13c95fdefSPeter MaydellHXCOMM Use DEFHEADING() to define headings in both help text and rST. 23c95fdefSPeter MaydellHXCOMM Text between SRST and ERST is copied to the rST version and 33c95fdefSPeter MaydellHXCOMM discarded from C version. 4ad96090aSBlue SwirlHXCOMM DEF(option, HAS_ARG/0, opt_enum, opt_help, arch_mask) is used to 5ad96090aSBlue SwirlHXCOMM construct option structures, enums and help message for specified 6ad96090aSBlue SwirlHXCOMM architectures. 73c95fdefSPeter MaydellHXCOMM HXCOMM can be used for comments, discarded from both rST and C. 85824d651Sblueswir1 9de6b4f90SMarkus ArmbrusterDEFHEADING(Standard options:) 105824d651Sblueswir1 115824d651Sblueswir1DEF("help", 0, QEMU_OPTION_h, 12ad96090aSBlue Swirl "-h or -help display this help and exit\n", QEMU_ARCH_ALL) 13e2fcbf42SPeter MaydellSRST 14e2fcbf42SPeter Maydell``-h`` 15e2fcbf42SPeter Maydell Display help and exit 16e2fcbf42SPeter MaydellERST 175824d651Sblueswir1 189bd7e6d9SpbrookDEF("version", 0, QEMU_OPTION_version, 19ad96090aSBlue Swirl "-version display version information and exit\n", QEMU_ARCH_ALL) 20e2fcbf42SPeter MaydellSRST 21e2fcbf42SPeter Maydell``-version`` 22e2fcbf42SPeter Maydell Display version information and exit 23e2fcbf42SPeter MaydellERST 249bd7e6d9Spbrook 2580f52a66SJan KiszkaDEF("machine", HAS_ARG, QEMU_OPTION_machine, \ 2680f52a66SJan Kiszka "-machine [type=]name[,prop[=value][,...]]\n" 27585f6036SPeter Maydell " selects emulated machine ('-machine help' for list)\n" 2880f52a66SJan Kiszka " property accel=accel1[:accel2[:...]] selects accelerator\n" 29d661d9a4SJustin Terry (VM) " supported accelerators are kvm, xen, hax, hvf, whpx or tcg (default: tcg)\n" 30d1048befSDon Slutz " vmport=on|off|auto controls emulation of vmport (default: auto)\n" 318490fc78SLuiz Capitulino " dump-guest-core=on|off include guest memory in a core dump (default=on)\n" 32a52a7fdfSLe Tan " mem-merge=on|off controls memory merge support (default: on)\n" 332eb1cd07STony Krowiak " aes-key-wrap=on|off controls support for AES key wrapping (default=on)\n" 349850c604SAlexander Graf " dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n" 3587252e1bSXiao Guangrong " suppress-vmdesc=on|off disables self-describing migration (default=off)\n" 36902c053dSGreg Kurz " nvdimm=on|off controls NVDIMM support (default=off)\n" 37274250c3SXiao Feng Ren " enforce-config-section=on|off enforce configuration section migration (default=off)\n" 38244b3f44STao Xu " memory-encryption=@var{} memory encryption object to use (default=none)\n" 39244b3f44STao Xu " hmat=on|off controls ACPI HMAT support (default=off)\n", 4080f52a66SJan Kiszka QEMU_ARCH_ALL) 41e2fcbf42SPeter MaydellSRST 42e2fcbf42SPeter Maydell``-machine [type=]name[,prop=value[,...]]`` 43e2fcbf42SPeter Maydell Select the emulated machine by name. Use ``-machine help`` to list 44e2fcbf42SPeter Maydell available machines. 45e2fcbf42SPeter Maydell 46e2fcbf42SPeter Maydell For architectures which aim to support live migration compatibility 47e2fcbf42SPeter Maydell across releases, each release will introduce a new versioned machine 48e2fcbf42SPeter Maydell type. For example, the 2.8.0 release introduced machine types 49e2fcbf42SPeter Maydell "pc-i440fx-2.8" and "pc-q35-2.8" for the x86\_64/i686 architectures. 50e2fcbf42SPeter Maydell 51e2fcbf42SPeter Maydell To allow live migration of guests from QEMU version 2.8.0, to QEMU 52e2fcbf42SPeter Maydell version 2.9.0, the 2.9.0 version must support the "pc-i440fx-2.8" 53e2fcbf42SPeter Maydell and "pc-q35-2.8" machines too. To allow users live migrating VMs to 54e2fcbf42SPeter Maydell skip multiple intermediate releases when upgrading, new releases of 55e2fcbf42SPeter Maydell QEMU will support machine types from many previous versions. 56e2fcbf42SPeter Maydell 57e2fcbf42SPeter Maydell Supported machine properties are: 58e2fcbf42SPeter Maydell 59e2fcbf42SPeter Maydell ``accel=accels1[:accels2[:...]]`` 60e2fcbf42SPeter Maydell This is used to enable an accelerator. Depending on the target 61e2fcbf42SPeter Maydell architecture, kvm, xen, hax, hvf, whpx or tcg can be available. 62e2fcbf42SPeter Maydell By default, tcg is used. If there is more than one accelerator 63e2fcbf42SPeter Maydell specified, the next one is used if the previous one fails to 64e2fcbf42SPeter Maydell initialize. 65e2fcbf42SPeter Maydell 66e2fcbf42SPeter Maydell ``vmport=on|off|auto`` 67e2fcbf42SPeter Maydell Enables emulation of VMWare IO port, for vmmouse etc. auto says 68e2fcbf42SPeter Maydell to select the value based on accel. For accel=xen the default is 69e2fcbf42SPeter Maydell off otherwise the default is on. 70e2fcbf42SPeter Maydell 71e2fcbf42SPeter Maydell ``dump-guest-core=on|off`` 72e2fcbf42SPeter Maydell Include guest memory in a core dump. The default is on. 73e2fcbf42SPeter Maydell 74e2fcbf42SPeter Maydell ``mem-merge=on|off`` 75e2fcbf42SPeter Maydell Enables or disables memory merge support. This feature, when 76e2fcbf42SPeter Maydell supported by the host, de-duplicates identical memory pages 77e2fcbf42SPeter Maydell among VMs instances (enabled by default). 78e2fcbf42SPeter Maydell 79e2fcbf42SPeter Maydell ``aes-key-wrap=on|off`` 80e2fcbf42SPeter Maydell Enables or disables AES key wrapping support on s390-ccw hosts. 81e2fcbf42SPeter Maydell This feature controls whether AES wrapping keys will be created 82e2fcbf42SPeter Maydell to allow execution of AES cryptographic functions. The default 83e2fcbf42SPeter Maydell is on. 84e2fcbf42SPeter Maydell 85e2fcbf42SPeter Maydell ``dea-key-wrap=on|off`` 86e2fcbf42SPeter Maydell Enables or disables DEA key wrapping support on s390-ccw hosts. 87e2fcbf42SPeter Maydell This feature controls whether DEA wrapping keys will be created 88e2fcbf42SPeter Maydell to allow execution of DEA cryptographic functions. The default 89e2fcbf42SPeter Maydell is on. 90e2fcbf42SPeter Maydell 91e2fcbf42SPeter Maydell ``nvdimm=on|off`` 92e2fcbf42SPeter Maydell Enables or disables NVDIMM support. The default is off. 93e2fcbf42SPeter Maydell 94e2fcbf42SPeter Maydell ``enforce-config-section=on|off`` 95e2fcbf42SPeter Maydell If ``enforce-config-section`` is set to on, force migration code 96e2fcbf42SPeter Maydell to send configuration section even if the machine-type sets the 97e2fcbf42SPeter Maydell ``migration.send-configuration`` property to off. NOTE: this 98e2fcbf42SPeter Maydell parameter is deprecated. Please use ``-global`` 99e2fcbf42SPeter Maydell ``migration.send-configuration``\ =on\|off instead. 100e2fcbf42SPeter Maydell 101e2fcbf42SPeter Maydell ``memory-encryption=`` 102e2fcbf42SPeter Maydell Memory encryption object to use. The default is none. 103e2fcbf42SPeter Maydell 104e2fcbf42SPeter Maydell ``hmat=on|off`` 105e2fcbf42SPeter Maydell Enables or disables ACPI Heterogeneous Memory Attribute Table 106e2fcbf42SPeter Maydell (HMAT) support. The default is off. 107e2fcbf42SPeter MaydellERST 1085824d651Sblueswir1 10980f52a66SJan KiszkaHXCOMM Deprecated by -machine 11080f52a66SJan KiszkaDEF("M", HAS_ARG, QEMU_OPTION_M, "", QEMU_ARCH_ALL) 11180f52a66SJan Kiszka 1125824d651Sblueswir1DEF("cpu", HAS_ARG, QEMU_OPTION_cpu, 113585f6036SPeter Maydell "-cpu cpu select CPU ('-cpu help' for list)\n", QEMU_ARCH_ALL) 114e2fcbf42SPeter MaydellSRST 115e2fcbf42SPeter Maydell``-cpu model`` 116e2fcbf42SPeter Maydell Select CPU model (``-cpu help`` for list and additional feature 117e2fcbf42SPeter Maydell selection) 118e2fcbf42SPeter MaydellERST 1195824d651Sblueswir1 1208d4e9146SKONRAD FredericDEF("accel", HAS_ARG, QEMU_OPTION_accel, 121fe174132SPaolo Bonzini "-accel [accel=]accelerator[,prop[=value][,...]]\n" 122d661d9a4SJustin Terry (VM) " select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)\n" 12346472d82SPaolo Bonzini " igd-passthru=on|off (enable Xen integrated Intel graphics passthrough, default=off)\n" 12411bc4a13SPaolo Bonzini " kernel-irqchip=on|off|split controls accelerated irqchip support (default=on)\n" 12523b0898eSPaolo Bonzini " kvm-shadow-mem=size of KVM shadow MMU in bytes\n" 126fe174132SPaolo Bonzini " tb-size=n (TCG translation block cache size)\n" 1270b3c5c81SEduardo Habkost " thread=single|multi (enable multi-threaded TCG)\n", QEMU_ARCH_ALL) 128e2fcbf42SPeter MaydellSRST 129e2fcbf42SPeter Maydell``-accel name[,prop=value[,...]]`` 130e2fcbf42SPeter Maydell This is used to enable an accelerator. Depending on the target 131e2fcbf42SPeter Maydell architecture, kvm, xen, hax, hvf, whpx or tcg can be available. By 132e2fcbf42SPeter Maydell default, tcg is used. If there is more than one accelerator 133e2fcbf42SPeter Maydell specified, the next one is used if the previous one fails to 134e2fcbf42SPeter Maydell initialize. 135e2fcbf42SPeter Maydell 136e2fcbf42SPeter Maydell ``igd-passthru=on|off`` 137e2fcbf42SPeter Maydell When Xen is in use, this option controls whether Intel 138e2fcbf42SPeter Maydell integrated graphics devices can be passed through to the guest 139e2fcbf42SPeter Maydell (default=off) 140e2fcbf42SPeter Maydell 141e2fcbf42SPeter Maydell ``kernel-irqchip=on|off|split`` 142e2fcbf42SPeter Maydell Controls KVM in-kernel irqchip support. The default is full 143e2fcbf42SPeter Maydell acceleration of the interrupt controllers. On x86, split irqchip 144e2fcbf42SPeter Maydell reduces the kernel attack surface, at a performance cost for 145e2fcbf42SPeter Maydell non-MSI interrupts. Disabling the in-kernel irqchip completely 146e2fcbf42SPeter Maydell is not recommended except for debugging purposes. 147e2fcbf42SPeter Maydell 148e2fcbf42SPeter Maydell ``kvm-shadow-mem=size`` 149e2fcbf42SPeter Maydell Defines the size of the KVM shadow MMU. 150e2fcbf42SPeter Maydell 151e2fcbf42SPeter Maydell ``tb-size=n`` 152e2fcbf42SPeter Maydell Controls the size (in MiB) of the TCG translation block cache. 153e2fcbf42SPeter Maydell 154e2fcbf42SPeter Maydell ``thread=single|multi`` 155e2fcbf42SPeter Maydell Controls number of TCG threads. When the TCG is multi-threaded 156e2fcbf42SPeter Maydell there will be one thread per vCPU therefor taking advantage of 157e2fcbf42SPeter Maydell additional host cores. The default is to enable multi-threading 158e2fcbf42SPeter Maydell where both the back-end and front-ends support it and no 159e2fcbf42SPeter Maydell incompatible TCG features have been enabled (e.g. 160e2fcbf42SPeter Maydell icount/replay). 161e2fcbf42SPeter MaydellERST 1628d4e9146SKONRAD Frederic 1635824d651Sblueswir1DEF("smp", HAS_ARG, QEMU_OPTION_smp, 1641b458422SLike Xu "-smp [cpus=]n[,maxcpus=cpus][,cores=cores][,threads=threads][,dies=dies][,sockets=sockets]\n" 1656be68d7eSJes Sorensen " set the number of CPUs to 'n' [default=1]\n" 1666be68d7eSJes Sorensen " maxcpus= maximum number of total cpus, including\n" 167ca1a8a06SBruce Rogers " offline CPUs for hotplug, etc\n" 1681b458422SLike Xu " cores= number of CPU cores on one socket (for PC, it's on one die)\n" 16958a04db1SAndre Przywara " threads= number of threads on one CPU core\n" 1701b458422SLike Xu " dies= number of CPU dies on one socket (for PC only)\n" 171ad96090aSBlue Swirl " sockets= number of discrete sockets in the system\n", 172ad96090aSBlue Swirl QEMU_ARCH_ALL) 173e2fcbf42SPeter MaydellSRST 174e2fcbf42SPeter Maydell``-smp [cpus=]n[,cores=cores][,threads=threads][,dies=dies][,sockets=sockets][,maxcpus=maxcpus]`` 175e2fcbf42SPeter Maydell Simulate an SMP system with n CPUs. On the PC target, up to 255 CPUs 176e2fcbf42SPeter Maydell are supported. On Sparc32 target, Linux limits the number of usable 177e2fcbf42SPeter Maydell CPUs to 4. For the PC target, the number of cores per die, the 178e2fcbf42SPeter Maydell number of threads per cores, the number of dies per packages and the 179e2fcbf42SPeter Maydell total number of sockets can be specified. Missing values will be 180e2fcbf42SPeter Maydell computed. If any on the three values is given, the total number of 181e2fcbf42SPeter Maydell CPUs n can be omitted. maxcpus specifies the maximum number of 182e2fcbf42SPeter Maydell hotpluggable CPUs. 183e2fcbf42SPeter MaydellERST 1845824d651Sblueswir1 185268a362cSaliguoriDEF("numa", HAS_ARG, QEMU_OPTION_numa, 186244b3f44STao Xu "-numa node[,mem=size][,cpus=firstcpu[-lastcpu]][,nodeid=node][,initiator=node]\n" 187244b3f44STao Xu "-numa node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node][,initiator=node]\n" 1882d19c656SIgor Mammedov "-numa dist,src=source,dst=destination,val=distance\n" 1899b12dfa0SLiu Jingqi "-numa cpu,node-id=node[,socket-id=x][,core-id=y][,thread-id=z]\n" 190c412a48dSLiu Jingqi "-numa hmat-lb,initiator=node,target=node,hierarchy=memory|first-level|second-level|third-level,data-type=access-latency|read-latency|write-latency[,latency=lat][,bandwidth=bw]\n" 191c412a48dSLiu Jingqi "-numa hmat-cache,node-id=node,size=size,level=level[,associativity=none|direct|complex][,policy=none|write-back|write-through][,line=size]\n", 1922d19c656SIgor Mammedov QEMU_ARCH_ALL) 193e2fcbf42SPeter MaydellSRST 19409ce5f2dSPeter Maydell``-numa node[,mem=size][,cpus=firstcpu[-lastcpu]][,nodeid=node][,initiator=initiator]`` 19509ce5f2dSPeter Maydell \ 19609ce5f2dSPeter Maydell``-numa node[,memdev=id][,cpus=firstcpu[-lastcpu]][,nodeid=node][,initiator=initiator]`` 19709ce5f2dSPeter Maydell \ 19809ce5f2dSPeter Maydell``-numa dist,src=source,dst=destination,val=distance`` 19909ce5f2dSPeter Maydell \ 20009ce5f2dSPeter Maydell``-numa cpu,node-id=node[,socket-id=x][,core-id=y][,thread-id=z]`` 20109ce5f2dSPeter Maydell \ 20209ce5f2dSPeter Maydell``-numa hmat-lb,initiator=node,target=node,hierarchy=hierarchy,data-type=tpye[,latency=lat][,bandwidth=bw]`` 20309ce5f2dSPeter Maydell \ 20409ce5f2dSPeter Maydell``-numa hmat-cache,node-id=node,size=size,level=level[,associativity=str][,policy=str][,line=size]`` 205e2fcbf42SPeter Maydell Define a NUMA node and assign RAM and VCPUs to it. Set the NUMA 206e2fcbf42SPeter Maydell distance from a source node to a destination node. Set the ACPI 207e2fcbf42SPeter Maydell Heterogeneous Memory Attributes for the given nodes. 208e2fcbf42SPeter Maydell 209e2fcbf42SPeter Maydell Legacy VCPU assignment uses '\ ``cpus``\ ' option where firstcpu and 210e2fcbf42SPeter Maydell lastcpu are CPU indexes. Each '\ ``cpus``\ ' option represent a 211e2fcbf42SPeter Maydell contiguous range of CPU indexes (or a single VCPU if lastcpu is 212e2fcbf42SPeter Maydell omitted). A non-contiguous set of VCPUs can be represented by 213e2fcbf42SPeter Maydell providing multiple '\ ``cpus``\ ' options. If '\ ``cpus``\ ' is 214e2fcbf42SPeter Maydell omitted on all nodes, VCPUs are automatically split between them. 215e2fcbf42SPeter Maydell 216e2fcbf42SPeter Maydell For example, the following option assigns VCPUs 0, 1, 2 and 5 to a 217e2fcbf42SPeter Maydell NUMA node: 218e2fcbf42SPeter Maydell 219e2fcbf42SPeter Maydell :: 220e2fcbf42SPeter Maydell 221e2fcbf42SPeter Maydell -numa node,cpus=0-2,cpus=5 222e2fcbf42SPeter Maydell 223e2fcbf42SPeter Maydell '\ ``cpu``\ ' option is a new alternative to '\ ``cpus``\ ' option 224e2fcbf42SPeter Maydell which uses '\ ``socket-id|core-id|thread-id``\ ' properties to 225e2fcbf42SPeter Maydell assign CPU objects to a node using topology layout properties of 226e2fcbf42SPeter Maydell CPU. The set of properties is machine specific, and depends on used 227e2fcbf42SPeter Maydell machine type/'\ ``smp``\ ' options. It could be queried with 228e2fcbf42SPeter Maydell '\ ``hotpluggable-cpus``\ ' monitor command. '\ ``node-id``\ ' 229e2fcbf42SPeter Maydell property specifies node to which CPU object will be assigned, it's 230e2fcbf42SPeter Maydell required for node to be declared with '\ ``node``\ ' option before 231e2fcbf42SPeter Maydell it's used with '\ ``cpu``\ ' option. 232e2fcbf42SPeter Maydell 233e2fcbf42SPeter Maydell For example: 234e2fcbf42SPeter Maydell 235e2fcbf42SPeter Maydell :: 236e2fcbf42SPeter Maydell 237e2fcbf42SPeter Maydell -M pc \ 238e2fcbf42SPeter Maydell -smp 1,sockets=2,maxcpus=2 \ 239e2fcbf42SPeter Maydell -numa node,nodeid=0 -numa node,nodeid=1 \ 240e2fcbf42SPeter Maydell -numa cpu,node-id=0,socket-id=0 -numa cpu,node-id=1,socket-id=1 241e2fcbf42SPeter Maydell 24232a354dcSIgor Mammedov Legacy '\ ``mem``\ ' assigns a given RAM amount to a node (not supported 24332a354dcSIgor Mammedov for 5.1 and newer machine types). '\ ``memdev``\ ' assigns RAM from 24432a354dcSIgor Mammedov a given memory backend device to a node. If '\ ``mem``\ ' and 24532a354dcSIgor Mammedov '\ ``memdev``\ ' are omitted in all nodes, RAM is split equally between them. 24632a354dcSIgor Mammedov 247e2fcbf42SPeter Maydell 248e2fcbf42SPeter Maydell '\ ``mem``\ ' and '\ ``memdev``\ ' are mutually exclusive. 249e2fcbf42SPeter Maydell Furthermore, if one node uses '\ ``memdev``\ ', all of them have to 250e2fcbf42SPeter Maydell use it. 251e2fcbf42SPeter Maydell 252e2fcbf42SPeter Maydell '\ ``initiator``\ ' is an additional option that points to an 253e2fcbf42SPeter Maydell initiator NUMA node that has best performance (the lowest latency or 254e2fcbf42SPeter Maydell largest bandwidth) to this NUMA node. Note that this option can be 255e2fcbf42SPeter Maydell set only when the machine property 'hmat' is set to 'on'. 256e2fcbf42SPeter Maydell 257e2fcbf42SPeter Maydell Following example creates a machine with 2 NUMA nodes, node 0 has 258e2fcbf42SPeter Maydell CPU. node 1 has only memory, and its initiator is node 0. Note that 259e2fcbf42SPeter Maydell because node 0 has CPU, by default the initiator of node 0 is itself 260e2fcbf42SPeter Maydell and must be itself. 261e2fcbf42SPeter Maydell 262e2fcbf42SPeter Maydell :: 263e2fcbf42SPeter Maydell 264e2fcbf42SPeter Maydell -machine hmat=on \ 265e2fcbf42SPeter Maydell -m 2G,slots=2,maxmem=4G \ 266e2fcbf42SPeter Maydell -object memory-backend-ram,size=1G,id=m0 \ 267e2fcbf42SPeter Maydell -object memory-backend-ram,size=1G,id=m1 \ 268e2fcbf42SPeter Maydell -numa node,nodeid=0,memdev=m0 \ 269e2fcbf42SPeter Maydell -numa node,nodeid=1,memdev=m1,initiator=0 \ 270e2fcbf42SPeter Maydell -smp 2,sockets=2,maxcpus=2 \ 271e2fcbf42SPeter Maydell -numa cpu,node-id=0,socket-id=0 \ 272e2fcbf42SPeter Maydell -numa cpu,node-id=0,socket-id=1 273e2fcbf42SPeter Maydell 274e2fcbf42SPeter Maydell source and destination are NUMA node IDs. distance is the NUMA 275e2fcbf42SPeter Maydell distance from source to destination. The distance from a node to 276e2fcbf42SPeter Maydell itself is always 10. If any pair of nodes is given a distance, then 277e2fcbf42SPeter Maydell all pairs must be given distances. Although, when distances are only 278e2fcbf42SPeter Maydell given in one direction for each pair of nodes, then the distances in 279e2fcbf42SPeter Maydell the opposite directions are assumed to be the same. If, however, an 280e2fcbf42SPeter Maydell asymmetrical pair of distances is given for even one node pair, then 281e2fcbf42SPeter Maydell all node pairs must be provided distance values for both directions, 282e2fcbf42SPeter Maydell even when they are symmetrical. When a node is unreachable from 283e2fcbf42SPeter Maydell another node, set the pair's distance to 255. 284e2fcbf42SPeter Maydell 285e2fcbf42SPeter Maydell Note that the -``numa`` option doesn't allocate any of the specified 286e2fcbf42SPeter Maydell resources, it just assigns existing resources to NUMA nodes. This 287e2fcbf42SPeter Maydell means that one still has to use the ``-m``, ``-smp`` options to 288e2fcbf42SPeter Maydell allocate RAM and VCPUs respectively. 289e2fcbf42SPeter Maydell 290e2fcbf42SPeter Maydell Use '\ ``hmat-lb``\ ' to set System Locality Latency and Bandwidth 291e2fcbf42SPeter Maydell Information between initiator and target NUMA nodes in ACPI 292e2fcbf42SPeter Maydell Heterogeneous Attribute Memory Table (HMAT). Initiator NUMA node can 293e2fcbf42SPeter Maydell create memory requests, usually it has one or more processors. 294e2fcbf42SPeter Maydell Target NUMA node contains addressable memory. 295e2fcbf42SPeter Maydell 296e2fcbf42SPeter Maydell In '\ ``hmat-lb``\ ' option, node are NUMA node IDs. hierarchy is 297e2fcbf42SPeter Maydell the memory hierarchy of the target NUMA node: if hierarchy is 298e2fcbf42SPeter Maydell 'memory', the structure represents the memory performance; if 299e2fcbf42SPeter Maydell hierarchy is 'first-level\|second-level\|third-level', this 300e2fcbf42SPeter Maydell structure represents aggregated performance of memory side caches 301e2fcbf42SPeter Maydell for each domain. type of 'data-type' is type of data represented by 302e2fcbf42SPeter Maydell this structure instance: if 'hierarchy' is 'memory', 'data-type' is 303e2fcbf42SPeter Maydell 'access\|read\|write' latency or 'access\|read\|write' bandwidth of 304e2fcbf42SPeter Maydell the target memory; if 'hierarchy' is 305e2fcbf42SPeter Maydell 'first-level\|second-level\|third-level', 'data-type' is 306e2fcbf42SPeter Maydell 'access\|read\|write' hit latency or 'access\|read\|write' hit 307e2fcbf42SPeter Maydell bandwidth of the target memory side cache. 308e2fcbf42SPeter Maydell 309e2fcbf42SPeter Maydell lat is latency value in nanoseconds. bw is bandwidth value, the 310e2fcbf42SPeter Maydell possible value and units are NUM[M\|G\|T], mean that the bandwidth 311e2fcbf42SPeter Maydell value are NUM byte per second (or MB/s, GB/s or TB/s depending on 312e2fcbf42SPeter Maydell used suffix). Note that if latency or bandwidth value is 0, means 313e2fcbf42SPeter Maydell the corresponding latency or bandwidth information is not provided. 314e2fcbf42SPeter Maydell 315e2fcbf42SPeter Maydell In '\ ``hmat-cache``\ ' option, node-id is the NUMA-id of the memory 316e2fcbf42SPeter Maydell belongs. size is the size of memory side cache in bytes. level is 317e2fcbf42SPeter Maydell the cache level described in this structure, note that the cache 318e2fcbf42SPeter Maydell level 0 should not be used with '\ ``hmat-cache``\ ' option. 319e2fcbf42SPeter Maydell associativity is the cache associativity, the possible value is 320e2fcbf42SPeter Maydell 'none/direct(direct-mapped)/complex(complex cache indexing)'. policy 321e2fcbf42SPeter Maydell is the write policy. line is the cache Line size in bytes. 322e2fcbf42SPeter Maydell 323e2fcbf42SPeter Maydell For example, the following options describe 2 NUMA nodes. Node 0 has 324e2fcbf42SPeter Maydell 2 cpus and a ram, node 1 has only a ram. The processors in node 0 325e2fcbf42SPeter Maydell access memory in node 0 with access-latency 5 nanoseconds, 326e2fcbf42SPeter Maydell access-bandwidth is 200 MB/s; The processors in NUMA node 0 access 327e2fcbf42SPeter Maydell memory in NUMA node 1 with access-latency 10 nanoseconds, 328e2fcbf42SPeter Maydell access-bandwidth is 100 MB/s. And for memory side cache information, 329e2fcbf42SPeter Maydell NUMA node 0 and 1 both have 1 level memory cache, size is 10KB, 330e2fcbf42SPeter Maydell policy is write-back, the cache Line size is 8 bytes: 331e2fcbf42SPeter Maydell 332e2fcbf42SPeter Maydell :: 333e2fcbf42SPeter Maydell 334e2fcbf42SPeter Maydell -machine hmat=on \ 335e2fcbf42SPeter Maydell -m 2G \ 336e2fcbf42SPeter Maydell -object memory-backend-ram,size=1G,id=m0 \ 337e2fcbf42SPeter Maydell -object memory-backend-ram,size=1G,id=m1 \ 338e2fcbf42SPeter Maydell -smp 2 \ 339e2fcbf42SPeter Maydell -numa node,nodeid=0,memdev=m0 \ 340e2fcbf42SPeter Maydell -numa node,nodeid=1,memdev=m1,initiator=0 \ 341e2fcbf42SPeter Maydell -numa cpu,node-id=0,socket-id=0 \ 342e2fcbf42SPeter Maydell -numa cpu,node-id=0,socket-id=1 \ 343e2fcbf42SPeter Maydell -numa hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-latency,latency=5 \ 344e2fcbf42SPeter Maydell -numa hmat-lb,initiator=0,target=0,hierarchy=memory,data-type=access-bandwidth,bandwidth=200M \ 345e2fcbf42SPeter Maydell -numa hmat-lb,initiator=0,target=1,hierarchy=memory,data-type=access-latency,latency=10 \ 346e2fcbf42SPeter Maydell -numa hmat-lb,initiator=0,target=1,hierarchy=memory,data-type=access-bandwidth,bandwidth=100M \ 347e2fcbf42SPeter Maydell -numa hmat-cache,node-id=0,size=10K,level=1,associativity=direct,policy=write-back,line=8 \ 348e2fcbf42SPeter Maydell -numa hmat-cache,node-id=1,size=10K,level=1,associativity=direct,policy=write-back,line=8 349e2fcbf42SPeter MaydellERST 350268a362cSaliguori 35110adb8beSMarkus ArmbrusterDEF("add-fd", HAS_ARG, QEMU_OPTION_add_fd, 35210adb8beSMarkus Armbruster "-add-fd fd=fd,set=set[,opaque=opaque]\n" 35310adb8beSMarkus Armbruster " Add 'fd' to fd 'set'\n", QEMU_ARCH_ALL) 354e2fcbf42SPeter MaydellSRST 355e2fcbf42SPeter Maydell``-add-fd fd=fd,set=set[,opaque=opaque]`` 356e2fcbf42SPeter Maydell Add a file descriptor to an fd set. Valid options are: 357e2fcbf42SPeter Maydell 358e2fcbf42SPeter Maydell ``fd=fd`` 359e2fcbf42SPeter Maydell This option defines the file descriptor of which a duplicate is 360e2fcbf42SPeter Maydell added to fd set. The file descriptor cannot be stdin, stdout, or 361e2fcbf42SPeter Maydell stderr. 362e2fcbf42SPeter Maydell 363e2fcbf42SPeter Maydell ``set=set`` 364e2fcbf42SPeter Maydell This option defines the ID of the fd set to add the file 365e2fcbf42SPeter Maydell descriptor to. 366e2fcbf42SPeter Maydell 367e2fcbf42SPeter Maydell ``opaque=opaque`` 368e2fcbf42SPeter Maydell This option defines a free-form string that can be used to 369e2fcbf42SPeter Maydell describe fd. 370e2fcbf42SPeter Maydell 371e2fcbf42SPeter Maydell You can open an image using pre-opened file descriptors from an fd 372e2fcbf42SPeter Maydell set: 373e2fcbf42SPeter Maydell 374e2fcbf42SPeter Maydell .. parsed-literal:: 375e2fcbf42SPeter Maydell 376e2fcbf42SPeter Maydell |qemu_system| \ 377e2fcbf42SPeter Maydell -add-fd fd=3,set=2,opaque="rdwr:/path/to/file" \ 378e2fcbf42SPeter Maydell -add-fd fd=4,set=2,opaque="rdonly:/path/to/file" \ 379e2fcbf42SPeter Maydell -drive file=/dev/fdset/2,index=0,media=disk 380e2fcbf42SPeter MaydellERST 38110adb8beSMarkus Armbruster 38210adb8beSMarkus ArmbrusterDEF("set", HAS_ARG, QEMU_OPTION_set, 38310adb8beSMarkus Armbruster "-set group.id.arg=value\n" 38410adb8beSMarkus Armbruster " set <arg> parameter for item <id> of type <group>\n" 38510adb8beSMarkus Armbruster " i.e. -set drive.$id.file=/path/to/image\n", QEMU_ARCH_ALL) 386e2fcbf42SPeter MaydellSRST 387e2fcbf42SPeter Maydell``-set group.id.arg=value`` 388e2fcbf42SPeter Maydell Set parameter arg for item id of type group 389e2fcbf42SPeter MaydellERST 39010adb8beSMarkus Armbruster 39110adb8beSMarkus ArmbrusterDEF("global", HAS_ARG, QEMU_OPTION_global, 3923751d7c4SPaolo Bonzini "-global driver.property=value\n" 3933751d7c4SPaolo Bonzini "-global driver=driver,property=property,value=value\n" 39410adb8beSMarkus Armbruster " set a global default for a driver property\n", 39510adb8beSMarkus Armbruster QEMU_ARCH_ALL) 396e2fcbf42SPeter MaydellSRST 39709ce5f2dSPeter Maydell``-global driver.prop=value`` 39809ce5f2dSPeter Maydell \ 39909ce5f2dSPeter Maydell``-global driver=driver,property=property,value=value`` 400e2fcbf42SPeter Maydell Set default value of driver's property prop to value, e.g.: 401e2fcbf42SPeter Maydell 402e2fcbf42SPeter Maydell .. parsed-literal:: 403e2fcbf42SPeter Maydell 404e2fcbf42SPeter Maydell |qemu_system_x86| -global ide-hd.physical_block_size=4096 disk-image.img 405e2fcbf42SPeter Maydell 406e2fcbf42SPeter Maydell In particular, you can use this to set driver properties for devices 407e2fcbf42SPeter Maydell which are created automatically by the machine model. To create a 408e2fcbf42SPeter Maydell device which is not created automatically and set properties on it, 409e2fcbf42SPeter Maydell use -``device``. 410e2fcbf42SPeter Maydell 411e2fcbf42SPeter Maydell -global driver.prop=value is shorthand for -global 412e2fcbf42SPeter Maydell driver=driver,property=prop,value=value. The longhand syntax works 413e2fcbf42SPeter Maydell even when driver contains a dot. 414e2fcbf42SPeter MaydellERST 41510adb8beSMarkus Armbruster 41610adb8beSMarkus ArmbrusterDEF("boot", HAS_ARG, QEMU_OPTION_boot, 41710adb8beSMarkus Armbruster "-boot [order=drives][,once=drives][,menu=on|off]\n" 418c8a6ae8bSAmos Kong " [,splash=sp_name][,splash-time=sp_time][,reboot-timeout=rb_time][,strict=on|off]\n" 41910adb8beSMarkus Armbruster " 'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)\n" 42010adb8beSMarkus Armbruster " 'sp_name': the file's name that would be passed to bios as logo picture, if menu=on\n" 42110adb8beSMarkus Armbruster " 'sp_time': the period that splash picture last if menu=on, unit is ms\n" 42210adb8beSMarkus Armbruster " 'rb_timeout': the timeout before guest reboot when boot failed, unit is ms\n", 42310adb8beSMarkus Armbruster QEMU_ARCH_ALL) 424e2fcbf42SPeter MaydellSRST 425e2fcbf42SPeter Maydell``-boot [order=drives][,once=drives][,menu=on|off][,splash=sp_name][,splash-time=sp_time][,reboot-timeout=rb_timeout][,strict=on|off]`` 426e2fcbf42SPeter Maydell Specify boot order drives as a string of drive letters. Valid drive 427e2fcbf42SPeter Maydell letters depend on the target architecture. The x86 PC uses: a, b 428e2fcbf42SPeter Maydell (floppy 1 and 2), c (first hard disk), d (first CD-ROM), n-p 429e2fcbf42SPeter Maydell (Etherboot from network adapter 1-4), hard disk boot is the default. 430e2fcbf42SPeter Maydell To apply a particular boot order only on the first startup, specify 431e2fcbf42SPeter Maydell it via ``once``. Note that the ``order`` or ``once`` parameter 432e2fcbf42SPeter Maydell should not be used together with the ``bootindex`` property of 433e2fcbf42SPeter Maydell devices, since the firmware implementations normally do not support 434e2fcbf42SPeter Maydell both at the same time. 435e2fcbf42SPeter Maydell 436e2fcbf42SPeter Maydell Interactive boot menus/prompts can be enabled via ``menu=on`` as far 437e2fcbf42SPeter Maydell as firmware/BIOS supports them. The default is non-interactive boot. 438e2fcbf42SPeter Maydell 439e2fcbf42SPeter Maydell A splash picture could be passed to bios, enabling user to show it 440e2fcbf42SPeter Maydell as logo, when option splash=sp\_name is given and menu=on, If 441e2fcbf42SPeter Maydell firmware/BIOS supports them. Currently Seabios for X86 system 442e2fcbf42SPeter Maydell support it. limitation: The splash file could be a jpeg file or a 443e2fcbf42SPeter Maydell BMP file in 24 BPP format(true color). The resolution should be 444e2fcbf42SPeter Maydell supported by the SVGA mode, so the recommended is 320x240, 640x480, 445e2fcbf42SPeter Maydell 800x640. 446e2fcbf42SPeter Maydell 447e2fcbf42SPeter Maydell A timeout could be passed to bios, guest will pause for rb\_timeout 448e2fcbf42SPeter Maydell ms when boot failed, then reboot. If rb\_timeout is '-1', guest will 449e2fcbf42SPeter Maydell not reboot, qemu passes '-1' to bios by default. Currently Seabios 450e2fcbf42SPeter Maydell for X86 system support it. 451e2fcbf42SPeter Maydell 452e2fcbf42SPeter Maydell Do strict boot via ``strict=on`` as far as firmware/BIOS supports 453e2fcbf42SPeter Maydell it. This only effects when boot priority is changed by bootindex 454e2fcbf42SPeter Maydell options. The default is non-strict boot. 455e2fcbf42SPeter Maydell 45609ce5f2dSPeter Maydell .. parsed-literal:: 457e2fcbf42SPeter Maydell 458e2fcbf42SPeter Maydell # try to boot from network first, then from hard disk 459e2fcbf42SPeter Maydell |qemu_system_x86| -boot order=nc 460e2fcbf42SPeter Maydell # boot from CD-ROM first, switch back to default order after reboot 461e2fcbf42SPeter Maydell |qemu_system_x86| -boot once=d 462e2fcbf42SPeter Maydell # boot with a splash picture for 5 seconds. 463e2fcbf42SPeter Maydell |qemu_system_x86| -boot menu=on,splash=/root/boot.bmp,splash-time=5000 464e2fcbf42SPeter Maydell 465e2fcbf42SPeter Maydell Note: The legacy format '-boot drives' is still supported but its 466e2fcbf42SPeter Maydell use is discouraged as it may be removed from future versions. 467e2fcbf42SPeter MaydellERST 46810adb8beSMarkus Armbruster 46910adb8beSMarkus ArmbrusterDEF("m", HAS_ARG, QEMU_OPTION_m, 47089f3ea2bSMichael Tokarev "-m [size=]megs[,slots=n,maxmem=size]\n" 4716e1d3c1cSIgor Mammedov " configure guest RAM\n" 4720daba1f0SAlexander Graf " size: initial amount of guest memory\n" 473c270fb9eSIgor Mammedov " slots: number of hotplug slots (default: none)\n" 474b6fe0124SMatthew Rosato " maxmem: maximum amount of guest memory (default: none)\n" 475b6fe0124SMatthew Rosato "NOTE: Some architectures might enforce a specific granularity\n", 4766e1d3c1cSIgor Mammedov QEMU_ARCH_ALL) 477e2fcbf42SPeter MaydellSRST 478e2fcbf42SPeter Maydell``-m [size=]megs[,slots=n,maxmem=size]`` 479e2fcbf42SPeter Maydell Sets guest startup RAM size to megs megabytes. Default is 128 MiB. 480e2fcbf42SPeter Maydell Optionally, a suffix of "M" or "G" can be used to signify a value in 481e2fcbf42SPeter Maydell megabytes or gigabytes respectively. Optional pair slots, maxmem 482e2fcbf42SPeter Maydell could be used to set amount of hotpluggable memory slots and maximum 483e2fcbf42SPeter Maydell amount of memory. Note that maxmem must be aligned to the page size. 484e2fcbf42SPeter Maydell 485e2fcbf42SPeter Maydell For example, the following command-line sets the guest startup RAM 486e2fcbf42SPeter Maydell size to 1GB, creates 3 slots to hotplug additional memory and sets 487e2fcbf42SPeter Maydell the maximum memory the guest can reach to 4GB: 488e2fcbf42SPeter Maydell 489e2fcbf42SPeter Maydell .. parsed-literal:: 490e2fcbf42SPeter Maydell 491e2fcbf42SPeter Maydell |qemu_system| -m 1G,slots=3,maxmem=4G 492e2fcbf42SPeter Maydell 493e2fcbf42SPeter Maydell If slots and maxmem are not specified, memory hotplug won't be 494e2fcbf42SPeter Maydell enabled and the guest startup RAM will never increase. 495e2fcbf42SPeter MaydellERST 49610adb8beSMarkus Armbruster 49710adb8beSMarkus ArmbrusterDEF("mem-path", HAS_ARG, QEMU_OPTION_mempath, 49810adb8beSMarkus Armbruster "-mem-path FILE provide backing storage for guest RAM\n", QEMU_ARCH_ALL) 499e2fcbf42SPeter MaydellSRST 500e2fcbf42SPeter Maydell``-mem-path path`` 501e2fcbf42SPeter Maydell Allocate guest RAM from a temporarily created file in path. 502e2fcbf42SPeter MaydellERST 50310adb8beSMarkus Armbruster 50410adb8beSMarkus ArmbrusterDEF("mem-prealloc", 0, QEMU_OPTION_mem_prealloc, 50510adb8beSMarkus Armbruster "-mem-prealloc preallocate guest memory (use with -mem-path)\n", 50610adb8beSMarkus Armbruster QEMU_ARCH_ALL) 507e2fcbf42SPeter MaydellSRST 508e2fcbf42SPeter Maydell``-mem-prealloc`` 509e2fcbf42SPeter Maydell Preallocate memory when using -mem-path. 510e2fcbf42SPeter MaydellERST 51110adb8beSMarkus Armbruster 51210adb8beSMarkus ArmbrusterDEF("k", HAS_ARG, QEMU_OPTION_k, 51310adb8beSMarkus Armbruster "-k language use keyboard layout (for example 'fr' for French)\n", 51410adb8beSMarkus Armbruster QEMU_ARCH_ALL) 515e2fcbf42SPeter MaydellSRST 516e2fcbf42SPeter Maydell``-k language`` 517e2fcbf42SPeter Maydell Use keyboard layout language (for example ``fr`` for French). This 518e2fcbf42SPeter Maydell option is only needed where it is not easy to get raw PC keycodes 519e2fcbf42SPeter Maydell (e.g. on Macs, with some X11 servers or with a VNC or curses 520e2fcbf42SPeter Maydell display). You don't normally need to use it on PC/Linux or 521e2fcbf42SPeter Maydell PC/Windows hosts. 522e2fcbf42SPeter Maydell 523e2fcbf42SPeter Maydell The available layouts are: 524e2fcbf42SPeter Maydell 525e2fcbf42SPeter Maydell :: 526e2fcbf42SPeter Maydell 527e2fcbf42SPeter Maydell ar de-ch es fo fr-ca hu ja mk no pt-br sv 528e2fcbf42SPeter Maydell da en-gb et fr fr-ch is lt nl pl ru th 529e2fcbf42SPeter Maydell de en-us fi fr-be hr it lv nl-be pt sl tr 530e2fcbf42SPeter Maydell 531e2fcbf42SPeter Maydell The default is ``en-us``. 532e2fcbf42SPeter MaydellERST 53310adb8beSMarkus Armbruster 53410adb8beSMarkus Armbruster 535f0b3d811SKővágó, ZoltánHXCOMM Deprecated by -audiodev 53610adb8beSMarkus ArmbrusterDEF("audio-help", 0, QEMU_OPTION_audio_help, 537f0b3d811SKővágó, Zoltán "-audio-help show -audiodev equivalent of the currently specified audio settings\n", 53810adb8beSMarkus Armbruster QEMU_ARCH_ALL) 539e2fcbf42SPeter MaydellSRST 540e2fcbf42SPeter Maydell``-audio-help`` 541e2fcbf42SPeter Maydell Will show the -audiodev equivalent of the currently specified 542e2fcbf42SPeter Maydell (deprecated) environment variables. 543e2fcbf42SPeter MaydellERST 544f0b3d811SKővágó, Zoltán 545f0b3d811SKővágó, ZoltánDEF("audiodev", HAS_ARG, QEMU_OPTION_audiodev, 546f0b3d811SKővágó, Zoltán "-audiodev [driver=]driver,id=id[,prop[=value][,...]]\n" 547f0b3d811SKővágó, Zoltán " specifies the audio backend to use\n" 548f0b3d811SKővágó, Zoltán " id= identifier of the backend\n" 549f0b3d811SKővágó, Zoltán " timer-period= timer period in microseconds\n" 5508efac073SKővágó, Zoltán " in|out.mixing-engine= use mixing engine to mix streams inside QEMU\n" 551f0b3d811SKővágó, Zoltán " in|out.fixed-settings= use fixed settings for host audio\n" 552f0b3d811SKővágó, Zoltán " in|out.frequency= frequency to use with fixed settings\n" 553f0b3d811SKővágó, Zoltán " in|out.channels= number of channels to use with fixed settings\n" 554f0b3d811SKővágó, Zoltán " in|out.format= sample format to use with fixed settings\n" 55549f77e6fSVolker Rümelin " valid values: s8, s16, s32, u8, u16, u32, f32\n" 556f0b3d811SKővágó, Zoltán " in|out.voices= number of voices to use\n" 5578624725bSStefan Hajnoczi " in|out.buffer-length= length of buffer in microseconds\n" 558f0b3d811SKővágó, Zoltán "-audiodev none,id=id,[,prop[=value][,...]]\n" 559f0b3d811SKővágó, Zoltán " dummy driver that discards all output\n" 560f0b3d811SKővágó, Zoltán#ifdef CONFIG_AUDIO_ALSA 561f0b3d811SKővágó, Zoltán "-audiodev alsa,id=id[,prop[=value][,...]]\n" 562f0b3d811SKővágó, Zoltán " in|out.dev= name of the audio device to use\n" 563dfc54343SStefan Hajnoczi " in|out.period-length= length of period in microseconds\n" 564f0b3d811SKővágó, Zoltán " in|out.try-poll= attempt to use poll mode\n" 565f0b3d811SKővágó, Zoltán " threshold= threshold (in microseconds) when playback starts\n" 566f0b3d811SKővágó, Zoltán#endif 567f0b3d811SKővágó, Zoltán#ifdef CONFIG_AUDIO_COREAUDIO 568f0b3d811SKővágó, Zoltán "-audiodev coreaudio,id=id[,prop[=value][,...]]\n" 569f0b3d811SKővágó, Zoltán " in|out.buffer-count= number of buffers\n" 570f0b3d811SKővágó, Zoltán#endif 571f0b3d811SKővágó, Zoltán#ifdef CONFIG_AUDIO_DSOUND 572f0b3d811SKővágó, Zoltán "-audiodev dsound,id=id[,prop[=value][,...]]\n" 573f0b3d811SKővágó, Zoltán " latency= add extra latency to playback in microseconds\n" 574f0b3d811SKővágó, Zoltán#endif 575f0b3d811SKővágó, Zoltán#ifdef CONFIG_AUDIO_OSS 576f0b3d811SKővágó, Zoltán "-audiodev oss,id=id[,prop[=value][,...]]\n" 577f0b3d811SKővágó, Zoltán " in|out.dev= path of the audio device to use\n" 578f0b3d811SKővágó, Zoltán " in|out.buffer-count= number of buffers\n" 579f0b3d811SKővágó, Zoltán " in|out.try-poll= attempt to use poll mode\n" 580f0b3d811SKővágó, Zoltán " try-mmap= try using memory mapped access\n" 581f0b3d811SKővágó, Zoltán " exclusive= open device in exclusive mode\n" 582f0b3d811SKővágó, Zoltán " dsp-policy= set timing policy (0..10), -1 to use fragment mode\n" 583f0b3d811SKővágó, Zoltán#endif 584f0b3d811SKővágó, Zoltán#ifdef CONFIG_AUDIO_PA 585f0b3d811SKővágó, Zoltán "-audiodev pa,id=id[,prop[=value][,...]]\n" 586f0b3d811SKővágó, Zoltán " server= PulseAudio server address\n" 587f0b3d811SKővágó, Zoltán " in|out.name= source/sink device name\n" 58814d4f011SStefan Hajnoczi " in|out.latency= desired latency in microseconds\n" 589f0b3d811SKővágó, Zoltán#endif 590f0b3d811SKővágó, Zoltán#ifdef CONFIG_AUDIO_SDL 591f0b3d811SKővágó, Zoltán "-audiodev sdl,id=id[,prop[=value][,...]]\n" 592f0b3d811SKővágó, Zoltán#endif 593f0b3d811SKővágó, Zoltán#ifdef CONFIG_SPICE 594f0b3d811SKővágó, Zoltán "-audiodev spice,id=id[,prop[=value][,...]]\n" 595f0b3d811SKővágó, Zoltán#endif 596f0b3d811SKővágó, Zoltán "-audiodev wav,id=id[,prop[=value][,...]]\n" 597f0b3d811SKővágó, Zoltán " path= path of wav file to record\n", 598f0b3d811SKővágó, Zoltán QEMU_ARCH_ALL) 599e2fcbf42SPeter MaydellSRST 600e2fcbf42SPeter Maydell``-audiodev [driver=]driver,id=id[,prop[=value][,...]]`` 601e2fcbf42SPeter Maydell Adds a new audio backend driver identified by id. There are global 602e2fcbf42SPeter Maydell and driver specific properties. Some values can be set differently 603e2fcbf42SPeter Maydell for input and output, they're marked with ``in|out.``. You can set 604e2fcbf42SPeter Maydell the input's property with ``in.prop`` and the output's property with 605e2fcbf42SPeter Maydell ``out.prop``. For example: 606e2fcbf42SPeter Maydell 607e2fcbf42SPeter Maydell :: 608e2fcbf42SPeter Maydell 609e2fcbf42SPeter Maydell -audiodev alsa,id=example,in.frequency=44110,out.frequency=8000 610e2fcbf42SPeter Maydell -audiodev alsa,id=example,out.channels=1 # leaves in.channels unspecified 611e2fcbf42SPeter Maydell 612e2fcbf42SPeter Maydell NOTE: parameter validation is known to be incomplete, in many cases 613e2fcbf42SPeter Maydell specifying an invalid option causes QEMU to print an error message 614e2fcbf42SPeter Maydell and continue emulation without sound. 615e2fcbf42SPeter Maydell 616e2fcbf42SPeter Maydell Valid global options are: 617e2fcbf42SPeter Maydell 618e2fcbf42SPeter Maydell ``id=identifier`` 619e2fcbf42SPeter Maydell Identifies the audio backend. 620e2fcbf42SPeter Maydell 621e2fcbf42SPeter Maydell ``timer-period=period`` 622e2fcbf42SPeter Maydell Sets the timer period used by the audio subsystem in 623e2fcbf42SPeter Maydell microseconds. Default is 10000 (10 ms). 624e2fcbf42SPeter Maydell 625e2fcbf42SPeter Maydell ``in|out.mixing-engine=on|off`` 626e2fcbf42SPeter Maydell Use QEMU's mixing engine to mix all streams inside QEMU and 627e2fcbf42SPeter Maydell convert audio formats when not supported by the backend. When 628e2fcbf42SPeter Maydell off, fixed-settings must be off too. Note that disabling this 629e2fcbf42SPeter Maydell option means that the selected backend must support multiple 630e2fcbf42SPeter Maydell streams and the audio formats used by the virtual cards, 631e2fcbf42SPeter Maydell otherwise you'll get no sound. It's not recommended to disable 632e2fcbf42SPeter Maydell this option unless you want to use 5.1 or 7.1 audio, as mixing 633e2fcbf42SPeter Maydell engine only supports mono and stereo audio. Default is on. 634e2fcbf42SPeter Maydell 635e2fcbf42SPeter Maydell ``in|out.fixed-settings=on|off`` 636e2fcbf42SPeter Maydell Use fixed settings for host audio. When off, it will change 637e2fcbf42SPeter Maydell based on how the guest opens the sound card. In this case you 638e2fcbf42SPeter Maydell must not specify frequency, channels or format. Default is on. 639e2fcbf42SPeter Maydell 640e2fcbf42SPeter Maydell ``in|out.frequency=frequency`` 641e2fcbf42SPeter Maydell Specify the frequency to use when using fixed-settings. Default 642e2fcbf42SPeter Maydell is 44100Hz. 643e2fcbf42SPeter Maydell 644e2fcbf42SPeter Maydell ``in|out.channels=channels`` 645e2fcbf42SPeter Maydell Specify the number of channels to use when using fixed-settings. 646e2fcbf42SPeter Maydell Default is 2 (stereo). 647e2fcbf42SPeter Maydell 648e2fcbf42SPeter Maydell ``in|out.format=format`` 649e2fcbf42SPeter Maydell Specify the sample format to use when using fixed-settings. 650e2fcbf42SPeter Maydell Valid values are: ``s8``, ``s16``, ``s32``, ``u8``, ``u16``, 65149f77e6fSVolker Rümelin ``u32``, ``f32``. Default is ``s16``. 652e2fcbf42SPeter Maydell 653e2fcbf42SPeter Maydell ``in|out.voices=voices`` 654e2fcbf42SPeter Maydell Specify the number of voices to use. Default is 1. 655e2fcbf42SPeter Maydell 656e2fcbf42SPeter Maydell ``in|out.buffer-length=usecs`` 657e2fcbf42SPeter Maydell Sets the size of the buffer in microseconds. 658e2fcbf42SPeter Maydell 659e2fcbf42SPeter Maydell``-audiodev none,id=id[,prop[=value][,...]]`` 660e2fcbf42SPeter Maydell Creates a dummy backend that discards all outputs. This backend has 661e2fcbf42SPeter Maydell no backend specific properties. 662e2fcbf42SPeter Maydell 663e2fcbf42SPeter Maydell``-audiodev alsa,id=id[,prop[=value][,...]]`` 664e2fcbf42SPeter Maydell Creates backend using the ALSA. This backend is only available on 665e2fcbf42SPeter Maydell Linux. 666e2fcbf42SPeter Maydell 667e2fcbf42SPeter Maydell ALSA specific options are: 668e2fcbf42SPeter Maydell 669e2fcbf42SPeter Maydell ``in|out.dev=device`` 670e2fcbf42SPeter Maydell Specify the ALSA device to use for input and/or output. Default 671e2fcbf42SPeter Maydell is ``default``. 672e2fcbf42SPeter Maydell 673e2fcbf42SPeter Maydell ``in|out.period-length=usecs`` 674e2fcbf42SPeter Maydell Sets the period length in microseconds. 675e2fcbf42SPeter Maydell 676e2fcbf42SPeter Maydell ``in|out.try-poll=on|off`` 677e2fcbf42SPeter Maydell Attempt to use poll mode with the device. Default is on. 678e2fcbf42SPeter Maydell 679e2fcbf42SPeter Maydell ``threshold=threshold`` 680e2fcbf42SPeter Maydell Threshold (in microseconds) when playback starts. Default is 0. 681e2fcbf42SPeter Maydell 682e2fcbf42SPeter Maydell``-audiodev coreaudio,id=id[,prop[=value][,...]]`` 683e2fcbf42SPeter Maydell Creates a backend using Apple's Core Audio. This backend is only 684e2fcbf42SPeter Maydell available on Mac OS and only supports playback. 685e2fcbf42SPeter Maydell 686e2fcbf42SPeter Maydell Core Audio specific options are: 687e2fcbf42SPeter Maydell 688e2fcbf42SPeter Maydell ``in|out.buffer-count=count`` 689e2fcbf42SPeter Maydell Sets the count of the buffers. 690e2fcbf42SPeter Maydell 691e2fcbf42SPeter Maydell``-audiodev dsound,id=id[,prop[=value][,...]]`` 692e2fcbf42SPeter Maydell Creates a backend using Microsoft's DirectSound. This backend is 693e2fcbf42SPeter Maydell only available on Windows and only supports playback. 694e2fcbf42SPeter Maydell 695e2fcbf42SPeter Maydell DirectSound specific options are: 696e2fcbf42SPeter Maydell 697e2fcbf42SPeter Maydell ``latency=usecs`` 698e2fcbf42SPeter Maydell Add extra usecs microseconds latency to playback. Default is 699e2fcbf42SPeter Maydell 10000 (10 ms). 700e2fcbf42SPeter Maydell 701e2fcbf42SPeter Maydell``-audiodev oss,id=id[,prop[=value][,...]]`` 702e2fcbf42SPeter Maydell Creates a backend using OSS. This backend is available on most 703e2fcbf42SPeter Maydell Unix-like systems. 704e2fcbf42SPeter Maydell 705e2fcbf42SPeter Maydell OSS specific options are: 706e2fcbf42SPeter Maydell 707e2fcbf42SPeter Maydell ``in|out.dev=device`` 708e2fcbf42SPeter Maydell Specify the file name of the OSS device to use. Default is 709e2fcbf42SPeter Maydell ``/dev/dsp``. 710e2fcbf42SPeter Maydell 711e2fcbf42SPeter Maydell ``in|out.buffer-count=count`` 712e2fcbf42SPeter Maydell Sets the count of the buffers. 713e2fcbf42SPeter Maydell 714e2fcbf42SPeter Maydell ``in|out.try-poll=on|of`` 715e2fcbf42SPeter Maydell Attempt to use poll mode with the device. Default is on. 716e2fcbf42SPeter Maydell 717e2fcbf42SPeter Maydell ``try-mmap=on|off`` 718e2fcbf42SPeter Maydell Try using memory mapped device access. Default is off. 719e2fcbf42SPeter Maydell 720e2fcbf42SPeter Maydell ``exclusive=on|off`` 721e2fcbf42SPeter Maydell Open the device in exclusive mode (vmix won't work in this 722e2fcbf42SPeter Maydell case). Default is off. 723e2fcbf42SPeter Maydell 724e2fcbf42SPeter Maydell ``dsp-policy=policy`` 725e2fcbf42SPeter Maydell Sets the timing policy (between 0 and 10, where smaller number 726e2fcbf42SPeter Maydell means smaller latency but higher CPU usage). Use -1 to use 727e2fcbf42SPeter Maydell buffer sizes specified by ``buffer`` and ``buffer-count``. This 728e2fcbf42SPeter Maydell option is ignored if you do not have OSS 4. Default is 5. 729e2fcbf42SPeter Maydell 730e2fcbf42SPeter Maydell``-audiodev pa,id=id[,prop[=value][,...]]`` 731e2fcbf42SPeter Maydell Creates a backend using PulseAudio. This backend is available on 732e2fcbf42SPeter Maydell most systems. 733e2fcbf42SPeter Maydell 734e2fcbf42SPeter Maydell PulseAudio specific options are: 735e2fcbf42SPeter Maydell 736e2fcbf42SPeter Maydell ``server=server`` 737e2fcbf42SPeter Maydell Sets the PulseAudio server to connect to. 738e2fcbf42SPeter Maydell 739e2fcbf42SPeter Maydell ``in|out.name=sink`` 740e2fcbf42SPeter Maydell Use the specified source/sink for recording/playback. 741e2fcbf42SPeter Maydell 742e2fcbf42SPeter Maydell ``in|out.latency=usecs`` 743e2fcbf42SPeter Maydell Desired latency in microseconds. The PulseAudio server will try 744e2fcbf42SPeter Maydell to honor this value but actual latencies may be lower or higher. 745e2fcbf42SPeter Maydell 746e2fcbf42SPeter Maydell``-audiodev sdl,id=id[,prop[=value][,...]]`` 747e2fcbf42SPeter Maydell Creates a backend using SDL. This backend is available on most 748e2fcbf42SPeter Maydell systems, but you should use your platform's native backend if 749e2fcbf42SPeter Maydell possible. This backend has no backend specific properties. 750e2fcbf42SPeter Maydell 751e2fcbf42SPeter Maydell``-audiodev spice,id=id[,prop[=value][,...]]`` 752e2fcbf42SPeter Maydell Creates a backend that sends audio through SPICE. This backend 753e2fcbf42SPeter Maydell requires ``-spice`` and automatically selected in that case, so 754e2fcbf42SPeter Maydell usually you can ignore this option. This backend has no backend 755e2fcbf42SPeter Maydell specific properties. 756e2fcbf42SPeter Maydell 757e2fcbf42SPeter Maydell``-audiodev wav,id=id[,prop[=value][,...]]`` 758e2fcbf42SPeter Maydell Creates a backend that writes audio to a WAV file. 759e2fcbf42SPeter Maydell 760e2fcbf42SPeter Maydell Backend specific options are: 761e2fcbf42SPeter Maydell 762e2fcbf42SPeter Maydell ``path=path`` 763e2fcbf42SPeter Maydell Write recorded audio into the specified file. Default is 764e2fcbf42SPeter Maydell ``qemu.wav``. 765e2fcbf42SPeter MaydellERST 76610adb8beSMarkus Armbruster 76710adb8beSMarkus ArmbrusterDEF("soundhw", HAS_ARG, QEMU_OPTION_soundhw, 76810adb8beSMarkus Armbruster "-soundhw c1,... enable audio support\n" 76910adb8beSMarkus Armbruster " and only specified sound cards (comma separated list)\n" 77010adb8beSMarkus Armbruster " use '-soundhw help' to get the list of supported cards\n" 77110adb8beSMarkus Armbruster " use '-soundhw all' to enable all of them\n", QEMU_ARCH_ALL) 772e2fcbf42SPeter MaydellSRST 773e2fcbf42SPeter Maydell``-soundhw card1[,card2,...] or -soundhw all`` 774e2fcbf42SPeter Maydell Enable audio and selected sound hardware. Use 'help' to print all 775e2fcbf42SPeter Maydell available sound hardware. For example: 776e2fcbf42SPeter Maydell 777e2fcbf42SPeter Maydell .. parsed-literal:: 778e2fcbf42SPeter Maydell 779e2fcbf42SPeter Maydell |qemu_system_x86| -soundhw sb16,adlib disk.img 780e2fcbf42SPeter Maydell |qemu_system_x86| -soundhw es1370 disk.img 781e2fcbf42SPeter Maydell |qemu_system_x86| -soundhw ac97 disk.img 782e2fcbf42SPeter Maydell |qemu_system_x86| -soundhw hda disk.img 783e2fcbf42SPeter Maydell |qemu_system_x86| -soundhw all disk.img 784e2fcbf42SPeter Maydell |qemu_system_x86| -soundhw help 785e2fcbf42SPeter Maydell 786e2fcbf42SPeter Maydell Note that Linux's i810\_audio OSS kernel (for AC97) module might 787e2fcbf42SPeter Maydell require manually specifying clocking. 788e2fcbf42SPeter Maydell 789e2fcbf42SPeter Maydell :: 790e2fcbf42SPeter Maydell 791e2fcbf42SPeter Maydell modprobe i810_audio clocking=48000 792e2fcbf42SPeter MaydellERST 79310adb8beSMarkus Armbruster 79410adb8beSMarkus ArmbrusterDEF("device", HAS_ARG, QEMU_OPTION_device, 79510adb8beSMarkus Armbruster "-device driver[,prop[=value][,...]]\n" 79610adb8beSMarkus Armbruster " add device (based on driver)\n" 79710adb8beSMarkus Armbruster " prop=value,... sets driver properties\n" 79810adb8beSMarkus Armbruster " use '-device help' to print all possible drivers\n" 79910adb8beSMarkus Armbruster " use '-device driver,help' to print all possible properties\n", 80010adb8beSMarkus Armbruster QEMU_ARCH_ALL) 801e2fcbf42SPeter MaydellSRST 802e2fcbf42SPeter Maydell``-device driver[,prop[=value][,...]]`` 803e2fcbf42SPeter Maydell Add device driver. prop=value sets driver properties. Valid 804e2fcbf42SPeter Maydell properties depend on the driver. To get help on possible drivers and 805e2fcbf42SPeter Maydell properties, use ``-device help`` and ``-device driver,help``. 806e2fcbf42SPeter Maydell 807e2fcbf42SPeter Maydell Some drivers are: 808e2fcbf42SPeter Maydell 809789101b7SCorey Minyard``-device ipmi-bmc-sim,id=id[,prop[=value][,...]]`` 810e2fcbf42SPeter Maydell Add an IPMI BMC. This is a simulation of a hardware management 811e2fcbf42SPeter Maydell interface processor that normally sits on a system. It provides a 812e2fcbf42SPeter Maydell watchdog and the ability to reset and power control the system. You 813e2fcbf42SPeter Maydell need to connect this to an IPMI interface to make it useful 814e2fcbf42SPeter Maydell 815e2fcbf42SPeter Maydell The IPMI slave address to use for the BMC. The default is 0x20. This 816e2fcbf42SPeter Maydell address is the BMC's address on the I2C network of management 817e2fcbf42SPeter Maydell controllers. If you don't know what this means, it is safe to ignore 818e2fcbf42SPeter Maydell it. 819e2fcbf42SPeter Maydell 820e2fcbf42SPeter Maydell ``id=id`` 821e2fcbf42SPeter Maydell The BMC id for interfaces to use this device. 822e2fcbf42SPeter Maydell 823e2fcbf42SPeter Maydell ``slave_addr=val`` 824e2fcbf42SPeter Maydell Define slave address to use for the BMC. The default is 0x20. 825e2fcbf42SPeter Maydell 826e2fcbf42SPeter Maydell ``sdrfile=file`` 827e2fcbf42SPeter Maydell file containing raw Sensor Data Records (SDR) data. The default 828e2fcbf42SPeter Maydell is none. 829e2fcbf42SPeter Maydell 830e2fcbf42SPeter Maydell ``fruareasize=val`` 831e2fcbf42SPeter Maydell size of a Field Replaceable Unit (FRU) area. The default is 832e2fcbf42SPeter Maydell 1024. 833e2fcbf42SPeter Maydell 834e2fcbf42SPeter Maydell ``frudatafile=file`` 835e2fcbf42SPeter Maydell file containing raw Field Replaceable Unit (FRU) inventory data. 836e2fcbf42SPeter Maydell The default is none. 837e2fcbf42SPeter Maydell 838e2fcbf42SPeter Maydell ``guid=uuid`` 839e2fcbf42SPeter Maydell value for the GUID for the BMC, in standard UUID format. If this 840e2fcbf42SPeter Maydell is set, get "Get GUID" command to the BMC will return it. 841e2fcbf42SPeter Maydell Otherwise "Get GUID" will return an error. 842e2fcbf42SPeter Maydell 843e2fcbf42SPeter Maydell``-device ipmi-bmc-extern,id=id,chardev=id[,slave_addr=val]`` 844e2fcbf42SPeter Maydell Add a connection to an external IPMI BMC simulator. Instead of 845e2fcbf42SPeter Maydell locally emulating the BMC like the above item, instead connect to an 846e2fcbf42SPeter Maydell external entity that provides the IPMI services. 847e2fcbf42SPeter Maydell 848e2fcbf42SPeter Maydell A connection is made to an external BMC simulator. If you do this, 849e2fcbf42SPeter Maydell it is strongly recommended that you use the "reconnect=" chardev 850e2fcbf42SPeter Maydell option to reconnect to the simulator if the connection is lost. Note 851e2fcbf42SPeter Maydell that if this is not used carefully, it can be a security issue, as 852e2fcbf42SPeter Maydell the interface has the ability to send resets, NMIs, and power off 853e2fcbf42SPeter Maydell the VM. It's best if QEMU makes a connection to an external 854e2fcbf42SPeter Maydell simulator running on a secure port on localhost, so neither the 855e2fcbf42SPeter Maydell simulator nor QEMU is exposed to any outside network. 856e2fcbf42SPeter Maydell 857e2fcbf42SPeter Maydell See the "lanserv/README.vm" file in the OpenIPMI library for more 858e2fcbf42SPeter Maydell details on the external interface. 859e2fcbf42SPeter Maydell 860e2fcbf42SPeter Maydell``-device isa-ipmi-kcs,bmc=id[,ioport=val][,irq=val]`` 861e2fcbf42SPeter Maydell Add a KCS IPMI interafce on the ISA bus. This also adds a 862e2fcbf42SPeter Maydell corresponding ACPI and SMBIOS entries, if appropriate. 863e2fcbf42SPeter Maydell 864e2fcbf42SPeter Maydell ``bmc=id`` 865e2fcbf42SPeter Maydell The BMC to connect to, one of ipmi-bmc-sim or ipmi-bmc-extern 866e2fcbf42SPeter Maydell above. 867e2fcbf42SPeter Maydell 868e2fcbf42SPeter Maydell ``ioport=val`` 869e2fcbf42SPeter Maydell Define the I/O address of the interface. The default is 0xca0 870e2fcbf42SPeter Maydell for KCS. 871e2fcbf42SPeter Maydell 872e2fcbf42SPeter Maydell ``irq=val`` 873e2fcbf42SPeter Maydell Define the interrupt to use. The default is 5. To disable 874e2fcbf42SPeter Maydell interrupts, set this to 0. 875e2fcbf42SPeter Maydell 876e2fcbf42SPeter Maydell``-device isa-ipmi-bt,bmc=id[,ioport=val][,irq=val]`` 877e2fcbf42SPeter Maydell Like the KCS interface, but defines a BT interface. The default port 878e2fcbf42SPeter Maydell is 0xe4 and the default interrupt is 5. 879323679daSCorey Minyard 880323679daSCorey Minyard``-device pci-ipmi-kcs,bmc=id`` 881323679daSCorey Minyard Add a KCS IPMI interafce on the PCI bus. 882323679daSCorey Minyard 883323679daSCorey Minyard ``bmc=id`` 884323679daSCorey Minyard The BMC to connect to, one of ipmi-bmc-sim or ipmi-bmc-extern above. 885323679daSCorey Minyard 886323679daSCorey Minyard``-device pci-ipmi-bt,bmc=id`` 887323679daSCorey Minyard Like the KCS interface, but defines a BT interface on the PCI bus. 888e2fcbf42SPeter MaydellERST 88910adb8beSMarkus Armbruster 89010adb8beSMarkus ArmbrusterDEF("name", HAS_ARG, QEMU_OPTION_name, 8918f480de0SDr. David Alan Gilbert "-name string1[,process=string2][,debug-threads=on|off]\n" 89210adb8beSMarkus Armbruster " set the name of the guest\n" 893479a5747SRoman Bolshakov " string1 sets the window title and string2 the process name\n" 894479a5747SRoman Bolshakov " When debug-threads is enabled, individual threads are given a separate name\n" 8958f480de0SDr. David Alan Gilbert " NOTE: The thread names are for debugging and not a stable API.\n", 89610adb8beSMarkus Armbruster QEMU_ARCH_ALL) 897e2fcbf42SPeter MaydellSRST 898e2fcbf42SPeter Maydell``-name name`` 899e2fcbf42SPeter Maydell Sets the name of the guest. This name will be displayed in the SDL 900e2fcbf42SPeter Maydell window caption. The name will also be used for the VNC server. Also 901e2fcbf42SPeter Maydell optionally set the top visible process name in Linux. Naming of 902e2fcbf42SPeter Maydell individual threads can also be enabled on Linux to aid debugging. 903e2fcbf42SPeter MaydellERST 90410adb8beSMarkus Armbruster 90510adb8beSMarkus ArmbrusterDEF("uuid", HAS_ARG, QEMU_OPTION_uuid, 90610adb8beSMarkus Armbruster "-uuid %08x-%04x-%04x-%04x-%012x\n" 90710adb8beSMarkus Armbruster " specify machine UUID\n", QEMU_ARCH_ALL) 908e2fcbf42SPeter MaydellSRST 909e2fcbf42SPeter Maydell``-uuid uuid`` 910e2fcbf42SPeter Maydell Set system UUID. 911e2fcbf42SPeter MaydellERST 91210adb8beSMarkus Armbruster 91310adb8beSMarkus ArmbrusterDEFHEADING() 91410adb8beSMarkus Armbruster 915de6b4f90SMarkus ArmbrusterDEFHEADING(Block device options:) 91610adb8beSMarkus Armbruster 9175824d651Sblueswir1DEF("fda", HAS_ARG, QEMU_OPTION_fda, 918ad96090aSBlue Swirl "-fda/-fdb file use 'file' as floppy disk 0/1 image\n", QEMU_ARCH_ALL) 919ad96090aSBlue SwirlDEF("fdb", HAS_ARG, QEMU_OPTION_fdb, "", QEMU_ARCH_ALL) 920e2fcbf42SPeter MaydellSRST 92109ce5f2dSPeter Maydell``-fda file`` 92209ce5f2dSPeter Maydell \ 92309ce5f2dSPeter Maydell``-fdb file`` 924e2fcbf42SPeter Maydell Use file as floppy disk 0/1 image (see 925e2fcbf42SPeter Maydell :ref:`disk_005fimages`). 926e2fcbf42SPeter MaydellERST 9275824d651Sblueswir1 9285824d651Sblueswir1DEF("hda", HAS_ARG, QEMU_OPTION_hda, 929ad96090aSBlue Swirl "-hda/-hdb file use 'file' as IDE hard disk 0/1 image\n", QEMU_ARCH_ALL) 930ad96090aSBlue SwirlDEF("hdb", HAS_ARG, QEMU_OPTION_hdb, "", QEMU_ARCH_ALL) 9315824d651Sblueswir1DEF("hdc", HAS_ARG, QEMU_OPTION_hdc, 932ad96090aSBlue Swirl "-hdc/-hdd file use 'file' as IDE hard disk 2/3 image\n", QEMU_ARCH_ALL) 933ad96090aSBlue SwirlDEF("hdd", HAS_ARG, QEMU_OPTION_hdd, "", QEMU_ARCH_ALL) 934e2fcbf42SPeter MaydellSRST 93509ce5f2dSPeter Maydell``-hda file`` 93609ce5f2dSPeter Maydell \ 93709ce5f2dSPeter Maydell``-hdb file`` 93809ce5f2dSPeter Maydell \ 93909ce5f2dSPeter Maydell``-hdc file`` 94009ce5f2dSPeter Maydell \ 94109ce5f2dSPeter Maydell``-hdd file`` 942e2fcbf42SPeter Maydell Use file as hard disk 0, 1, 2 or 3 image (see 943e2fcbf42SPeter Maydell :ref:`disk_005fimages`). 944e2fcbf42SPeter MaydellERST 9455824d651Sblueswir1 9465824d651Sblueswir1DEF("cdrom", HAS_ARG, QEMU_OPTION_cdrom, 947ad96090aSBlue Swirl "-cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)\n", 948ad96090aSBlue Swirl QEMU_ARCH_ALL) 949e2fcbf42SPeter MaydellSRST 950e2fcbf42SPeter Maydell``-cdrom file`` 951e2fcbf42SPeter Maydell Use file as CD-ROM image (you cannot use ``-hdc`` and ``-cdrom`` at 952e2fcbf42SPeter Maydell the same time). You can use the host CD-ROM by using ``/dev/cdrom`` 953e2fcbf42SPeter Maydell as filename. 954e2fcbf42SPeter MaydellERST 9555824d651Sblueswir1 95642e5f393SMarkus ArmbrusterDEF("blockdev", HAS_ARG, QEMU_OPTION_blockdev, 95742e5f393SMarkus Armbruster "-blockdev [driver=]driver[,node-name=N][,discard=ignore|unmap]\n" 95842e5f393SMarkus Armbruster " [,cache.direct=on|off][,cache.no-flush=on|off]\n" 959c9b749d7SKevin Wolf " [,read-only=on|off][,auto-read-only=on|off]\n" 960c9b749d7SKevin Wolf " [,force-share=on|off][,detect-zeroes=on|off|unmap]\n" 96142e5f393SMarkus Armbruster " [,driver specific parameters...]\n" 96242e5f393SMarkus Armbruster " configure a block backend\n", QEMU_ARCH_ALL) 963e2fcbf42SPeter MaydellSRST 964e2fcbf42SPeter Maydell``-blockdev option[,option[,option[,...]]]`` 965e2fcbf42SPeter Maydell Define a new block driver node. Some of the options apply to all 966e2fcbf42SPeter Maydell block drivers, other options are only accepted for a specific block 967e2fcbf42SPeter Maydell driver. See below for a list of generic options and options for the 968e2fcbf42SPeter Maydell most common block drivers. 969e2fcbf42SPeter Maydell 970e2fcbf42SPeter Maydell Options that expect a reference to another node (e.g. ``file``) can 971e2fcbf42SPeter Maydell be given in two ways. Either you specify the node name of an already 972e2fcbf42SPeter Maydell existing node (file=node-name), or you define a new node inline, 973e2fcbf42SPeter Maydell adding options for the referenced node after a dot 974e2fcbf42SPeter Maydell (file.filename=path,file.aio=native). 975e2fcbf42SPeter Maydell 976e2fcbf42SPeter Maydell A block driver node created with ``-blockdev`` can be used for a 977e2fcbf42SPeter Maydell guest device by specifying its node name for the ``drive`` property 978e2fcbf42SPeter Maydell in a ``-device`` argument that defines a block device. 979e2fcbf42SPeter Maydell 980e2fcbf42SPeter Maydell ``Valid options for any block driver node:`` 981e2fcbf42SPeter Maydell ``driver`` 982e2fcbf42SPeter Maydell Specifies the block driver to use for the given node. 983e2fcbf42SPeter Maydell 984e2fcbf42SPeter Maydell ``node-name`` 985e2fcbf42SPeter Maydell This defines the name of the block driver node by which it 986e2fcbf42SPeter Maydell will be referenced later. The name must be unique, i.e. it 987e2fcbf42SPeter Maydell must not match the name of a different block driver node, or 988e2fcbf42SPeter Maydell (if you use ``-drive`` as well) the ID of a drive. 989e2fcbf42SPeter Maydell 990e2fcbf42SPeter Maydell If no node name is specified, it is automatically generated. 991e2fcbf42SPeter Maydell The generated node name is not intended to be predictable 992e2fcbf42SPeter Maydell and changes between QEMU invocations. For the top level, an 993e2fcbf42SPeter Maydell explicit node name must be specified. 994e2fcbf42SPeter Maydell 995e2fcbf42SPeter Maydell ``read-only`` 996e2fcbf42SPeter Maydell Open the node read-only. Guest write attempts will fail. 997e2fcbf42SPeter Maydell 998e2fcbf42SPeter Maydell Note that some block drivers support only read-only access, 999e2fcbf42SPeter Maydell either generally or in certain configurations. In this case, 1000e2fcbf42SPeter Maydell the default value ``read-only=off`` does not work and the 1001e2fcbf42SPeter Maydell option must be specified explicitly. 1002e2fcbf42SPeter Maydell 1003e2fcbf42SPeter Maydell ``auto-read-only`` 1004e2fcbf42SPeter Maydell If ``auto-read-only=on`` is set, QEMU may fall back to 1005e2fcbf42SPeter Maydell read-only usage even when ``read-only=off`` is requested, or 1006e2fcbf42SPeter Maydell even switch between modes as needed, e.g. depending on 1007e2fcbf42SPeter Maydell whether the image file is writable or whether a writing user 1008e2fcbf42SPeter Maydell is attached to the node. 1009e2fcbf42SPeter Maydell 1010e2fcbf42SPeter Maydell ``force-share`` 1011e2fcbf42SPeter Maydell Override the image locking system of QEMU by forcing the 1012e2fcbf42SPeter Maydell node to utilize weaker shared access for permissions where 1013e2fcbf42SPeter Maydell it would normally request exclusive access. When there is 1014e2fcbf42SPeter Maydell the potential for multiple instances to have the same file 1015e2fcbf42SPeter Maydell open (whether this invocation of QEMU is the first or the 1016e2fcbf42SPeter Maydell second instance), both instances must permit shared access 1017e2fcbf42SPeter Maydell for the second instance to succeed at opening the file. 1018e2fcbf42SPeter Maydell 1019e2fcbf42SPeter Maydell Enabling ``force-share=on`` requires ``read-only=on``. 1020e2fcbf42SPeter Maydell 1021e2fcbf42SPeter Maydell ``cache.direct`` 1022e2fcbf42SPeter Maydell The host page cache can be avoided with ``cache.direct=on``. 1023e2fcbf42SPeter Maydell This will attempt to do disk IO directly to the guest's 1024e2fcbf42SPeter Maydell memory. QEMU may still perform an internal copy of the data. 1025e2fcbf42SPeter Maydell 1026e2fcbf42SPeter Maydell ``cache.no-flush`` 1027e2fcbf42SPeter Maydell In case you don't care about data integrity over host 1028e2fcbf42SPeter Maydell failures, you can use ``cache.no-flush=on``. This option 1029e2fcbf42SPeter Maydell tells QEMU that it never needs to write any data to the disk 1030e2fcbf42SPeter Maydell but can instead keep things in cache. If anything goes 1031e2fcbf42SPeter Maydell wrong, like your host losing power, the disk storage getting 1032e2fcbf42SPeter Maydell disconnected accidentally, etc. your image will most 1033e2fcbf42SPeter Maydell probably be rendered unusable. 1034e2fcbf42SPeter Maydell 1035e2fcbf42SPeter Maydell ``discard=discard`` 1036e2fcbf42SPeter Maydell discard is one of "ignore" (or "off") or "unmap" (or "on") 1037e2fcbf42SPeter Maydell and controls whether ``discard`` (also known as ``trim`` or 1038e2fcbf42SPeter Maydell ``unmap``) requests are ignored or passed to the filesystem. 1039e2fcbf42SPeter Maydell Some machine types may not support discard requests. 1040e2fcbf42SPeter Maydell 1041e2fcbf42SPeter Maydell ``detect-zeroes=detect-zeroes`` 1042e2fcbf42SPeter Maydell detect-zeroes is "off", "on" or "unmap" and enables the 1043e2fcbf42SPeter Maydell automatic conversion of plain zero writes by the OS to 1044e2fcbf42SPeter Maydell driver specific optimized zero write commands. You may even 1045e2fcbf42SPeter Maydell choose "unmap" if discard is set to "unmap" to allow a zero 1046e2fcbf42SPeter Maydell write to be converted to an ``unmap`` operation. 1047e2fcbf42SPeter Maydell 1048e2fcbf42SPeter Maydell ``Driver-specific options for file`` 1049e2fcbf42SPeter Maydell This is the protocol-level block driver for accessing regular 1050e2fcbf42SPeter Maydell files. 1051e2fcbf42SPeter Maydell 1052e2fcbf42SPeter Maydell ``filename`` 1053e2fcbf42SPeter Maydell The path to the image file in the local filesystem 1054e2fcbf42SPeter Maydell 1055e2fcbf42SPeter Maydell ``aio`` 1056e2fcbf42SPeter Maydell Specifies the AIO backend (threads/native, default: threads) 1057e2fcbf42SPeter Maydell 1058e2fcbf42SPeter Maydell ``locking`` 1059e2fcbf42SPeter Maydell Specifies whether the image file is protected with Linux OFD 1060e2fcbf42SPeter Maydell / POSIX locks. The default is to use the Linux Open File 1061e2fcbf42SPeter Maydell Descriptor API if available, otherwise no lock is applied. 1062e2fcbf42SPeter Maydell (auto/on/off, default: auto) 1063e2fcbf42SPeter Maydell 1064e2fcbf42SPeter Maydell Example: 1065e2fcbf42SPeter Maydell 1066e2fcbf42SPeter Maydell :: 1067e2fcbf42SPeter Maydell 1068e2fcbf42SPeter Maydell -blockdev driver=file,node-name=disk,filename=disk.img 1069e2fcbf42SPeter Maydell 1070e2fcbf42SPeter Maydell ``Driver-specific options for raw`` 1071e2fcbf42SPeter Maydell This is the image format block driver for raw images. It is 1072e2fcbf42SPeter Maydell usually stacked on top of a protocol level block driver such as 1073e2fcbf42SPeter Maydell ``file``. 1074e2fcbf42SPeter Maydell 1075e2fcbf42SPeter Maydell ``file`` 1076e2fcbf42SPeter Maydell Reference to or definition of the data source block driver 1077e2fcbf42SPeter Maydell node (e.g. a ``file`` driver node) 1078e2fcbf42SPeter Maydell 1079e2fcbf42SPeter Maydell Example 1: 1080e2fcbf42SPeter Maydell 1081e2fcbf42SPeter Maydell :: 1082e2fcbf42SPeter Maydell 1083e2fcbf42SPeter Maydell -blockdev driver=file,node-name=disk_file,filename=disk.img 1084e2fcbf42SPeter Maydell -blockdev driver=raw,node-name=disk,file=disk_file 1085e2fcbf42SPeter Maydell 1086e2fcbf42SPeter Maydell Example 2: 1087e2fcbf42SPeter Maydell 1088e2fcbf42SPeter Maydell :: 1089e2fcbf42SPeter Maydell 1090e2fcbf42SPeter Maydell -blockdev driver=raw,node-name=disk,file.driver=file,file.filename=disk.img 1091e2fcbf42SPeter Maydell 1092e2fcbf42SPeter Maydell ``Driver-specific options for qcow2`` 1093e2fcbf42SPeter Maydell This is the image format block driver for qcow2 images. It is 1094e2fcbf42SPeter Maydell usually stacked on top of a protocol level block driver such as 1095e2fcbf42SPeter Maydell ``file``. 1096e2fcbf42SPeter Maydell 1097e2fcbf42SPeter Maydell ``file`` 1098e2fcbf42SPeter Maydell Reference to or definition of the data source block driver 1099e2fcbf42SPeter Maydell node (e.g. a ``file`` driver node) 1100e2fcbf42SPeter Maydell 1101e2fcbf42SPeter Maydell ``backing`` 1102e2fcbf42SPeter Maydell Reference to or definition of the backing file block device 1103e2fcbf42SPeter Maydell (default is taken from the image file). It is allowed to 1104e2fcbf42SPeter Maydell pass ``null`` here in order to disable the default backing 1105e2fcbf42SPeter Maydell file. 1106e2fcbf42SPeter Maydell 1107e2fcbf42SPeter Maydell ``lazy-refcounts`` 1108e2fcbf42SPeter Maydell Whether to enable the lazy refcounts feature (on/off; 1109e2fcbf42SPeter Maydell default is taken from the image file) 1110e2fcbf42SPeter Maydell 1111e2fcbf42SPeter Maydell ``cache-size`` 1112e2fcbf42SPeter Maydell The maximum total size of the L2 table and refcount block 1113e2fcbf42SPeter Maydell caches in bytes (default: the sum of l2-cache-size and 1114e2fcbf42SPeter Maydell refcount-cache-size) 1115e2fcbf42SPeter Maydell 1116e2fcbf42SPeter Maydell ``l2-cache-size`` 1117e2fcbf42SPeter Maydell The maximum size of the L2 table cache in bytes (default: if 1118e2fcbf42SPeter Maydell cache-size is not specified - 32M on Linux platforms, and 8M 1119e2fcbf42SPeter Maydell on non-Linux platforms; otherwise, as large as possible 1120e2fcbf42SPeter Maydell within the cache-size, while permitting the requested or the 1121e2fcbf42SPeter Maydell minimal refcount cache size) 1122e2fcbf42SPeter Maydell 1123e2fcbf42SPeter Maydell ``refcount-cache-size`` 1124e2fcbf42SPeter Maydell The maximum size of the refcount block cache in bytes 1125e2fcbf42SPeter Maydell (default: 4 times the cluster size; or if cache-size is 1126e2fcbf42SPeter Maydell specified, the part of it which is not used for the L2 1127e2fcbf42SPeter Maydell cache) 1128e2fcbf42SPeter Maydell 1129e2fcbf42SPeter Maydell ``cache-clean-interval`` 1130e2fcbf42SPeter Maydell Clean unused entries in the L2 and refcount caches. The 1131e2fcbf42SPeter Maydell interval is in seconds. The default value is 600 on 1132e2fcbf42SPeter Maydell supporting platforms, and 0 on other platforms. Setting it 1133e2fcbf42SPeter Maydell to 0 disables this feature. 1134e2fcbf42SPeter Maydell 1135e2fcbf42SPeter Maydell ``pass-discard-request`` 1136e2fcbf42SPeter Maydell Whether discard requests to the qcow2 device should be 1137e2fcbf42SPeter Maydell forwarded to the data source (on/off; default: on if 1138e2fcbf42SPeter Maydell discard=unmap is specified, off otherwise) 1139e2fcbf42SPeter Maydell 1140e2fcbf42SPeter Maydell ``pass-discard-snapshot`` 1141e2fcbf42SPeter Maydell Whether discard requests for the data source should be 1142e2fcbf42SPeter Maydell issued when a snapshot operation (e.g. deleting a snapshot) 1143e2fcbf42SPeter Maydell frees clusters in the qcow2 file (on/off; default: on) 1144e2fcbf42SPeter Maydell 1145e2fcbf42SPeter Maydell ``pass-discard-other`` 1146e2fcbf42SPeter Maydell Whether discard requests for the data source should be 1147e2fcbf42SPeter Maydell issued on other occasions where a cluster gets freed 1148e2fcbf42SPeter Maydell (on/off; default: off) 1149e2fcbf42SPeter Maydell 1150e2fcbf42SPeter Maydell ``overlap-check`` 1151e2fcbf42SPeter Maydell Which overlap checks to perform for writes to the image 1152e2fcbf42SPeter Maydell (none/constant/cached/all; default: cached). For details or 1153e2fcbf42SPeter Maydell finer granularity control refer to the QAPI documentation of 1154e2fcbf42SPeter Maydell ``blockdev-add``. 1155e2fcbf42SPeter Maydell 1156e2fcbf42SPeter Maydell Example 1: 1157e2fcbf42SPeter Maydell 1158e2fcbf42SPeter Maydell :: 1159e2fcbf42SPeter Maydell 1160e2fcbf42SPeter Maydell -blockdev driver=file,node-name=my_file,filename=/tmp/disk.qcow2 1161e2fcbf42SPeter Maydell -blockdev driver=qcow2,node-name=hda,file=my_file,overlap-check=none,cache-size=16777216 1162e2fcbf42SPeter Maydell 1163e2fcbf42SPeter Maydell Example 2: 1164e2fcbf42SPeter Maydell 1165e2fcbf42SPeter Maydell :: 1166e2fcbf42SPeter Maydell 1167e2fcbf42SPeter Maydell -blockdev driver=qcow2,node-name=disk,file.driver=http,file.filename=http://example.com/image.qcow2 1168e2fcbf42SPeter Maydell 1169e2fcbf42SPeter Maydell ``Driver-specific options for other drivers`` 1170e2fcbf42SPeter Maydell Please refer to the QAPI documentation of the ``blockdev-add`` 1171e2fcbf42SPeter Maydell QMP command. 1172e2fcbf42SPeter MaydellERST 117342e5f393SMarkus Armbruster 11745824d651Sblueswir1DEF("drive", HAS_ARG, QEMU_OPTION_drive, 11755824d651Sblueswir1 "-drive [file=file][,if=type][,bus=n][,unit=m][,media=d][,index=i]\n" 117692196b2fSStefan Hajnoczi " [,cache=writethrough|writeback|none|directsync|unsafe][,format=f]\n" 1177572023f7SKevin Wolf " [,snapshot=on|off][,rerror=ignore|stop|report]\n" 1178d1db760dSStefan Hajnoczi " [,werror=ignore|stop|report|enospc][,id=name][,aio=threads|native]\n" 1179fb0490f6SStefan Hajnoczi " [,readonly=on|off][,copy-on-read=on|off]\n" 11802f7133b2SPeter Lieven " [,discard=ignore|unmap][,detect-zeroes=on|off|unmap]\n" 11813e9fab69SBenoît Canet " [[,bps=b]|[[,bps_rd=r][,bps_wr=w]]]\n" 11823e9fab69SBenoît Canet " [[,iops=i]|[[,iops_rd=r][,iops_wr=w]]]\n" 11833e9fab69SBenoît Canet " [[,bps_max=bm]|[[,bps_rd_max=rm][,bps_wr_max=wm]]]\n" 11843e9fab69SBenoît Canet " [[,iops_max=im]|[[,iops_rd_max=irm][,iops_wr_max=iwm]]]\n" 11852024c1dfSBenoît Canet " [[,iops_size=is]]\n" 118676f4afb4SAlberto Garcia " [[,group=g]]\n" 1187ad96090aSBlue Swirl " use 'file' as a drive image\n", QEMU_ARCH_ALL) 1188e2fcbf42SPeter MaydellSRST 1189e2fcbf42SPeter Maydell``-drive option[,option[,option[,...]]]`` 1190e2fcbf42SPeter Maydell Define a new drive. This includes creating a block driver node (the 1191e2fcbf42SPeter Maydell backend) as well as a guest device, and is mostly a shortcut for 1192e2fcbf42SPeter Maydell defining the corresponding ``-blockdev`` and ``-device`` options. 1193e2fcbf42SPeter Maydell 1194e2fcbf42SPeter Maydell ``-drive`` accepts all options that are accepted by ``-blockdev``. 1195e2fcbf42SPeter Maydell In addition, it knows the following options: 1196e2fcbf42SPeter Maydell 1197e2fcbf42SPeter Maydell ``file=file`` 1198e2fcbf42SPeter Maydell This option defines which disk image (see 1199e2fcbf42SPeter Maydell :ref:`disk_005fimages`) to use with this drive. If 1200e2fcbf42SPeter Maydell the filename contains comma, you must double it (for instance, 1201e2fcbf42SPeter Maydell "file=my,,file" to use file "my,file"). 1202e2fcbf42SPeter Maydell 1203e2fcbf42SPeter Maydell Special files such as iSCSI devices can be specified using 1204e2fcbf42SPeter Maydell protocol specific URLs. See the section for "Device URL Syntax" 1205e2fcbf42SPeter Maydell for more information. 1206e2fcbf42SPeter Maydell 1207e2fcbf42SPeter Maydell ``if=interface`` 1208e2fcbf42SPeter Maydell This option defines on which type on interface the drive is 1209e2fcbf42SPeter Maydell connected. Available types are: ide, scsi, sd, mtd, floppy, 1210e2fcbf42SPeter Maydell pflash, virtio, none. 1211e2fcbf42SPeter Maydell 1212e2fcbf42SPeter Maydell ``bus=bus,unit=unit`` 1213e2fcbf42SPeter Maydell These options define where is connected the drive by defining 1214e2fcbf42SPeter Maydell the bus number and the unit id. 1215e2fcbf42SPeter Maydell 1216e2fcbf42SPeter Maydell ``index=index`` 1217e2fcbf42SPeter Maydell This option defines where is connected the drive by using an 1218e2fcbf42SPeter Maydell index in the list of available connectors of a given interface 1219e2fcbf42SPeter Maydell type. 1220e2fcbf42SPeter Maydell 1221e2fcbf42SPeter Maydell ``media=media`` 1222e2fcbf42SPeter Maydell This option defines the type of the media: disk or cdrom. 1223e2fcbf42SPeter Maydell 1224e2fcbf42SPeter Maydell ``snapshot=snapshot`` 1225e2fcbf42SPeter Maydell snapshot is "on" or "off" and controls snapshot mode for the 1226e2fcbf42SPeter Maydell given drive (see ``-snapshot``). 1227e2fcbf42SPeter Maydell 1228e2fcbf42SPeter Maydell ``cache=cache`` 1229e2fcbf42SPeter Maydell cache is "none", "writeback", "unsafe", "directsync" or 1230e2fcbf42SPeter Maydell "writethrough" and controls how the host cache is used to access 1231e2fcbf42SPeter Maydell block data. This is a shortcut that sets the ``cache.direct`` 1232e2fcbf42SPeter Maydell and ``cache.no-flush`` options (as in ``-blockdev``), and 1233e2fcbf42SPeter Maydell additionally ``cache.writeback``, which provides a default for 1234e2fcbf42SPeter Maydell the ``write-cache`` option of block guest devices (as in 1235e2fcbf42SPeter Maydell ``-device``). The modes correspond to the following settings: 1236e2fcbf42SPeter Maydell 123709ce5f2dSPeter Maydell ============= =============== ============ ============== 123809ce5f2dSPeter Maydell \ cache.writeback cache.direct cache.no-flush 123909ce5f2dSPeter Maydell ============= =============== ============ ============== 124009ce5f2dSPeter Maydell writeback on off off 124109ce5f2dSPeter Maydell none on on off 124209ce5f2dSPeter Maydell writethrough off off off 124309ce5f2dSPeter Maydell directsync off on off 124409ce5f2dSPeter Maydell unsafe on off on 124509ce5f2dSPeter Maydell ============= =============== ============ ============== 1246e2fcbf42SPeter Maydell 1247e2fcbf42SPeter Maydell The default mode is ``cache=writeback``. 1248e2fcbf42SPeter Maydell 1249e2fcbf42SPeter Maydell ``aio=aio`` 1250e2fcbf42SPeter Maydell aio is "threads", or "native" and selects between pthread based 1251e2fcbf42SPeter Maydell disk I/O and native Linux AIO. 1252e2fcbf42SPeter Maydell 1253e2fcbf42SPeter Maydell ``format=format`` 1254e2fcbf42SPeter Maydell Specify which disk format will be used rather than detecting the 1255e2fcbf42SPeter Maydell format. Can be used to specify format=raw to avoid interpreting 1256e2fcbf42SPeter Maydell an untrusted format header. 1257e2fcbf42SPeter Maydell 1258e2fcbf42SPeter Maydell ``werror=action,rerror=action`` 1259e2fcbf42SPeter Maydell Specify which action to take on write and read errors. Valid 1260e2fcbf42SPeter Maydell actions are: "ignore" (ignore the error and try to continue), 1261e2fcbf42SPeter Maydell "stop" (pause QEMU), "report" (report the error to the guest), 1262e2fcbf42SPeter Maydell "enospc" (pause QEMU only if the host disk is full; report the 1263e2fcbf42SPeter Maydell error to the guest otherwise). The default setting is 1264e2fcbf42SPeter Maydell ``werror=enospc`` and ``rerror=report``. 1265e2fcbf42SPeter Maydell 1266e2fcbf42SPeter Maydell ``copy-on-read=copy-on-read`` 1267e2fcbf42SPeter Maydell copy-on-read is "on" or "off" and enables whether to copy read 1268e2fcbf42SPeter Maydell backing file sectors into the image file. 1269e2fcbf42SPeter Maydell 1270e2fcbf42SPeter Maydell ``bps=b,bps_rd=r,bps_wr=w`` 1271e2fcbf42SPeter Maydell Specify bandwidth throttling limits in bytes per second, either 1272e2fcbf42SPeter Maydell for all request types or for reads or writes only. Small values 1273e2fcbf42SPeter Maydell can lead to timeouts or hangs inside the guest. A safe minimum 1274e2fcbf42SPeter Maydell for disks is 2 MB/s. 1275e2fcbf42SPeter Maydell 1276e2fcbf42SPeter Maydell ``bps_max=bm,bps_rd_max=rm,bps_wr_max=wm`` 1277e2fcbf42SPeter Maydell Specify bursts in bytes per second, either for all request types 1278e2fcbf42SPeter Maydell or for reads or writes only. Bursts allow the guest I/O to spike 1279e2fcbf42SPeter Maydell above the limit temporarily. 1280e2fcbf42SPeter Maydell 1281e2fcbf42SPeter Maydell ``iops=i,iops_rd=r,iops_wr=w`` 1282e2fcbf42SPeter Maydell Specify request rate limits in requests per second, either for 1283e2fcbf42SPeter Maydell all request types or for reads or writes only. 1284e2fcbf42SPeter Maydell 1285e2fcbf42SPeter Maydell ``iops_max=bm,iops_rd_max=rm,iops_wr_max=wm`` 1286e2fcbf42SPeter Maydell Specify bursts in requests per second, either for all request 1287e2fcbf42SPeter Maydell types or for reads or writes only. Bursts allow the guest I/O to 1288e2fcbf42SPeter Maydell spike above the limit temporarily. 1289e2fcbf42SPeter Maydell 1290e2fcbf42SPeter Maydell ``iops_size=is`` 1291e2fcbf42SPeter Maydell Let every is bytes of a request count as a new request for iops 1292e2fcbf42SPeter Maydell throttling purposes. Use this option to prevent guests from 1293e2fcbf42SPeter Maydell circumventing iops limits by sending fewer but larger requests. 1294e2fcbf42SPeter Maydell 1295e2fcbf42SPeter Maydell ``group=g`` 1296e2fcbf42SPeter Maydell Join a throttling quota group with given name g. All drives that 1297e2fcbf42SPeter Maydell are members of the same group are accounted for together. Use 1298e2fcbf42SPeter Maydell this option to prevent guests from circumventing throttling 1299e2fcbf42SPeter Maydell limits by using many small disks instead of a single larger 1300e2fcbf42SPeter Maydell disk. 1301e2fcbf42SPeter Maydell 1302e2fcbf42SPeter Maydell By default, the ``cache.writeback=on`` mode is used. It will report 1303e2fcbf42SPeter Maydell data writes as completed as soon as the data is present in the host 1304e2fcbf42SPeter Maydell page cache. This is safe as long as your guest OS makes sure to 1305e2fcbf42SPeter Maydell correctly flush disk caches where needed. If your guest OS does not 1306e2fcbf42SPeter Maydell handle volatile disk write caches correctly and your host crashes or 1307e2fcbf42SPeter Maydell loses power, then the guest may experience data corruption. 1308e2fcbf42SPeter Maydell 1309e2fcbf42SPeter Maydell For such guests, you should consider using ``cache.writeback=off``. 1310e2fcbf42SPeter Maydell This means that the host page cache will be used to read and write 1311e2fcbf42SPeter Maydell data, but write notification will be sent to the guest only after 1312e2fcbf42SPeter Maydell QEMU has made sure to flush each write to the disk. Be aware that 1313e2fcbf42SPeter Maydell this has a major impact on performance. 1314e2fcbf42SPeter Maydell 1315e2fcbf42SPeter Maydell When using the ``-snapshot`` option, unsafe caching is always used. 1316e2fcbf42SPeter Maydell 1317e2fcbf42SPeter Maydell Copy-on-read avoids accessing the same backing file sectors 1318e2fcbf42SPeter Maydell repeatedly and is useful when the backing file is over a slow 1319e2fcbf42SPeter Maydell network. By default copy-on-read is off. 1320e2fcbf42SPeter Maydell 1321e2fcbf42SPeter Maydell Instead of ``-cdrom`` you can use: 1322e2fcbf42SPeter Maydell 1323e2fcbf42SPeter Maydell .. parsed-literal:: 1324e2fcbf42SPeter Maydell 1325e2fcbf42SPeter Maydell |qemu_system| -drive file=file,index=2,media=cdrom 1326e2fcbf42SPeter Maydell 1327e2fcbf42SPeter Maydell Instead of ``-hda``, ``-hdb``, ``-hdc``, ``-hdd``, you can use: 1328e2fcbf42SPeter Maydell 1329e2fcbf42SPeter Maydell .. parsed-literal:: 1330e2fcbf42SPeter Maydell 1331e2fcbf42SPeter Maydell |qemu_system| -drive file=file,index=0,media=disk 1332e2fcbf42SPeter Maydell |qemu_system| -drive file=file,index=1,media=disk 1333e2fcbf42SPeter Maydell |qemu_system| -drive file=file,index=2,media=disk 1334e2fcbf42SPeter Maydell |qemu_system| -drive file=file,index=3,media=disk 1335e2fcbf42SPeter Maydell 1336e2fcbf42SPeter Maydell You can open an image using pre-opened file descriptors from an fd 1337e2fcbf42SPeter Maydell set: 1338e2fcbf42SPeter Maydell 1339e2fcbf42SPeter Maydell .. parsed-literal:: 1340e2fcbf42SPeter Maydell 1341e2fcbf42SPeter Maydell |qemu_system| \ 1342e2fcbf42SPeter Maydell -add-fd fd=3,set=2,opaque="rdwr:/path/to/file" \ 1343e2fcbf42SPeter Maydell -add-fd fd=4,set=2,opaque="rdonly:/path/to/file" \ 1344e2fcbf42SPeter Maydell -drive file=/dev/fdset/2,index=0,media=disk 1345e2fcbf42SPeter Maydell 1346e2fcbf42SPeter Maydell You can connect a CDROM to the slave of ide0: 1347e2fcbf42SPeter Maydell 1348e2fcbf42SPeter Maydell .. parsed-literal:: 1349e2fcbf42SPeter Maydell 1350e2fcbf42SPeter Maydell |qemu_system_x86| -drive file=file,if=ide,index=1,media=cdrom 1351e2fcbf42SPeter Maydell 1352e2fcbf42SPeter Maydell If you don't specify the "file=" argument, you define an empty 1353e2fcbf42SPeter Maydell drive: 1354e2fcbf42SPeter Maydell 1355e2fcbf42SPeter Maydell .. parsed-literal:: 1356e2fcbf42SPeter Maydell 1357e2fcbf42SPeter Maydell |qemu_system_x86| -drive if=ide,index=1,media=cdrom 1358e2fcbf42SPeter Maydell 1359e2fcbf42SPeter Maydell Instead of ``-fda``, ``-fdb``, you can use: 1360e2fcbf42SPeter Maydell 1361e2fcbf42SPeter Maydell .. parsed-literal:: 1362e2fcbf42SPeter Maydell 1363e2fcbf42SPeter Maydell |qemu_system_x86| -drive file=file,index=0,if=floppy 1364e2fcbf42SPeter Maydell |qemu_system_x86| -drive file=file,index=1,if=floppy 1365e2fcbf42SPeter Maydell 1366e2fcbf42SPeter Maydell By default, interface is "ide" and index is automatically 1367e2fcbf42SPeter Maydell incremented: 1368e2fcbf42SPeter Maydell 1369e2fcbf42SPeter Maydell .. parsed-literal:: 1370e2fcbf42SPeter Maydell 1371e2fcbf42SPeter Maydell |qemu_system_x86| -drive file=a -drive file=b" 1372e2fcbf42SPeter Maydell 1373e2fcbf42SPeter Maydell is interpreted like: 1374e2fcbf42SPeter Maydell 1375e2fcbf42SPeter Maydell .. parsed-literal:: 1376e2fcbf42SPeter Maydell 1377e2fcbf42SPeter Maydell |qemu_system_x86| -hda a -hdb b 1378e2fcbf42SPeter MaydellERST 13795824d651Sblueswir1 13805824d651Sblueswir1DEF("mtdblock", HAS_ARG, QEMU_OPTION_mtdblock, 1381ad96090aSBlue Swirl "-mtdblock file use 'file' as on-board Flash memory image\n", 1382ad96090aSBlue Swirl QEMU_ARCH_ALL) 1383e2fcbf42SPeter MaydellSRST 1384e2fcbf42SPeter Maydell``-mtdblock file`` 1385e2fcbf42SPeter Maydell Use file as on-board Flash memory image. 1386e2fcbf42SPeter MaydellERST 13875824d651Sblueswir1 13885824d651Sblueswir1DEF("sd", HAS_ARG, QEMU_OPTION_sd, 1389ad96090aSBlue Swirl "-sd file use 'file' as SecureDigital card image\n", QEMU_ARCH_ALL) 1390e2fcbf42SPeter MaydellSRST 1391e2fcbf42SPeter Maydell``-sd file`` 1392e2fcbf42SPeter Maydell Use file as SecureDigital card image. 1393e2fcbf42SPeter MaydellERST 13945824d651Sblueswir1 13955824d651Sblueswir1DEF("pflash", HAS_ARG, QEMU_OPTION_pflash, 1396ad96090aSBlue Swirl "-pflash file use 'file' as a parallel flash image\n", QEMU_ARCH_ALL) 1397e2fcbf42SPeter MaydellSRST 1398e2fcbf42SPeter Maydell``-pflash file`` 1399e2fcbf42SPeter Maydell Use file as a parallel flash image. 1400e2fcbf42SPeter MaydellERST 14015824d651Sblueswir1 14025824d651Sblueswir1DEF("snapshot", 0, QEMU_OPTION_snapshot, 1403ad96090aSBlue Swirl "-snapshot write to temporary files instead of disk image files\n", 1404ad96090aSBlue Swirl QEMU_ARCH_ALL) 1405e2fcbf42SPeter MaydellSRST 1406e2fcbf42SPeter Maydell``-snapshot`` 1407e2fcbf42SPeter Maydell Write to temporary files instead of disk image files. In this case, 1408e2fcbf42SPeter Maydell the raw disk image you use is not written back. You can however 1409e2fcbf42SPeter Maydell force the write back by pressing C-a s (see 1410e2fcbf42SPeter Maydell :ref:`disk_005fimages`). 1411e2fcbf42SPeter MaydellERST 14125824d651Sblueswir1 141374db920cSGautham R ShenoyDEF("fsdev", HAS_ARG, QEMU_OPTION_fsdev, 1414b44a6b09SGreg Kurz "-fsdev local,id=id,path=path,security_model=mapped-xattr|mapped-file|passthrough|none\n" 1415b44a6b09SGreg Kurz " [,writeout=immediate][,readonly][,fmode=fmode][,dmode=dmode]\n" 1416b8bbdb88SPradeep Jagadeesh " [[,throttling.bps-total=b]|[[,throttling.bps-read=r][,throttling.bps-write=w]]]\n" 1417b8bbdb88SPradeep Jagadeesh " [[,throttling.iops-total=i]|[[,throttling.iops-read=r][,throttling.iops-write=w]]]\n" 1418b8bbdb88SPradeep Jagadeesh " [[,throttling.bps-total-max=bm]|[[,throttling.bps-read-max=rm][,throttling.bps-write-max=wm]]]\n" 1419b8bbdb88SPradeep Jagadeesh " [[,throttling.iops-total-max=im]|[[,throttling.iops-read-max=irm][,throttling.iops-write-max=iwm]]]\n" 1420b44a6b09SGreg Kurz " [[,throttling.iops-size=is]]\n" 1421b44a6b09SGreg Kurz "-fsdev proxy,id=id,socket=socket[,writeout=immediate][,readonly]\n" 1422b44a6b09SGreg Kurz "-fsdev proxy,id=id,sock_fd=sock_fd[,writeout=immediate][,readonly]\n" 1423b44a6b09SGreg Kurz "-fsdev synth,id=id\n", 142474db920cSGautham R Shenoy QEMU_ARCH_ALL) 142574db920cSGautham R Shenoy 1426e2fcbf42SPeter MaydellSRST 142709ce5f2dSPeter Maydell``-fsdev local,id=id,path=path,security_model=security_model [,writeout=writeout][,readonly][,fmode=fmode][,dmode=dmode] [,throttling.option=value[,throttling.option=value[,...]]]`` 142809ce5f2dSPeter Maydell \ 142909ce5f2dSPeter Maydell``-fsdev proxy,id=id,socket=socket[,writeout=writeout][,readonly]`` 143009ce5f2dSPeter Maydell \ 143109ce5f2dSPeter Maydell``-fsdev proxy,id=id,sock_fd=sock_fd[,writeout=writeout][,readonly]`` 143209ce5f2dSPeter Maydell \ 143309ce5f2dSPeter Maydell``-fsdev synth,id=id[,readonly]`` 1434e2fcbf42SPeter Maydell Define a new file system device. Valid options are: 1435e2fcbf42SPeter Maydell 1436e2fcbf42SPeter Maydell ``local`` 1437e2fcbf42SPeter Maydell Accesses to the filesystem are done by QEMU. 1438e2fcbf42SPeter Maydell 1439e2fcbf42SPeter Maydell ``proxy`` 1440e2fcbf42SPeter Maydell Accesses to the filesystem are done by virtfs-proxy-helper(1). 1441e2fcbf42SPeter Maydell 1442e2fcbf42SPeter Maydell ``synth`` 1443e2fcbf42SPeter Maydell Synthetic filesystem, only used by QTests. 1444e2fcbf42SPeter Maydell 1445e2fcbf42SPeter Maydell ``id=id`` 1446e2fcbf42SPeter Maydell Specifies identifier for this device. 1447e2fcbf42SPeter Maydell 1448e2fcbf42SPeter Maydell ``path=path`` 1449e2fcbf42SPeter Maydell Specifies the export path for the file system device. Files 1450e2fcbf42SPeter Maydell under this path will be available to the 9p client on the guest. 1451e2fcbf42SPeter Maydell 1452e2fcbf42SPeter Maydell ``security_model=security_model`` 1453e2fcbf42SPeter Maydell Specifies the security model to be used for this export path. 1454e2fcbf42SPeter Maydell Supported security models are "passthrough", "mapped-xattr", 1455e2fcbf42SPeter Maydell "mapped-file" and "none". In "passthrough" security model, files 1456e2fcbf42SPeter Maydell are stored using the same credentials as they are created on the 1457e2fcbf42SPeter Maydell guest. This requires QEMU to run as root. In "mapped-xattr" 1458e2fcbf42SPeter Maydell security model, some of the file attributes like uid, gid, mode 1459e2fcbf42SPeter Maydell bits and link target are stored as file attributes. For 1460e2fcbf42SPeter Maydell "mapped-file" these attributes are stored in the hidden 1461e2fcbf42SPeter Maydell .virtfs\_metadata directory. Directories exported by this 1462e2fcbf42SPeter Maydell security model cannot interact with other unix tools. "none" 1463e2fcbf42SPeter Maydell security model is same as passthrough except the sever won't 1464e2fcbf42SPeter Maydell report failures if it fails to set file attributes like 1465e2fcbf42SPeter Maydell ownership. Security model is mandatory only for local fsdriver. 1466e2fcbf42SPeter Maydell Other fsdrivers (like proxy) don't take security model as a 1467e2fcbf42SPeter Maydell parameter. 1468e2fcbf42SPeter Maydell 1469e2fcbf42SPeter Maydell ``writeout=writeout`` 1470e2fcbf42SPeter Maydell This is an optional argument. The only supported value is 1471e2fcbf42SPeter Maydell "immediate". This means that host page cache will be used to 1472e2fcbf42SPeter Maydell read and write data but write notification will be sent to the 1473e2fcbf42SPeter Maydell guest only when the data has been reported as written by the 1474e2fcbf42SPeter Maydell storage subsystem. 1475e2fcbf42SPeter Maydell 1476e2fcbf42SPeter Maydell ``readonly`` 1477e2fcbf42SPeter Maydell Enables exporting 9p share as a readonly mount for guests. By 1478e2fcbf42SPeter Maydell default read-write access is given. 1479e2fcbf42SPeter Maydell 1480e2fcbf42SPeter Maydell ``socket=socket`` 1481e2fcbf42SPeter Maydell Enables proxy filesystem driver to use passed socket file for 1482e2fcbf42SPeter Maydell communicating with virtfs-proxy-helper(1). 1483e2fcbf42SPeter Maydell 1484e2fcbf42SPeter Maydell ``sock_fd=sock_fd`` 1485e2fcbf42SPeter Maydell Enables proxy filesystem driver to use passed socket descriptor 1486e2fcbf42SPeter Maydell for communicating with virtfs-proxy-helper(1). Usually a helper 1487e2fcbf42SPeter Maydell like libvirt will create socketpair and pass one of the fds as 1488e2fcbf42SPeter Maydell sock\_fd. 1489e2fcbf42SPeter Maydell 1490e2fcbf42SPeter Maydell ``fmode=fmode`` 1491e2fcbf42SPeter Maydell Specifies the default mode for newly created files on the host. 1492e2fcbf42SPeter Maydell Works only with security models "mapped-xattr" and 1493e2fcbf42SPeter Maydell "mapped-file". 1494e2fcbf42SPeter Maydell 1495e2fcbf42SPeter Maydell ``dmode=dmode`` 1496e2fcbf42SPeter Maydell Specifies the default mode for newly created directories on the 1497e2fcbf42SPeter Maydell host. Works only with security models "mapped-xattr" and 1498e2fcbf42SPeter Maydell "mapped-file". 1499e2fcbf42SPeter Maydell 1500e2fcbf42SPeter Maydell ``throttling.bps-total=b,throttling.bps-read=r,throttling.bps-write=w`` 1501e2fcbf42SPeter Maydell Specify bandwidth throttling limits in bytes per second, either 1502e2fcbf42SPeter Maydell for all request types or for reads or writes only. 1503e2fcbf42SPeter Maydell 1504e2fcbf42SPeter Maydell ``throttling.bps-total-max=bm,bps-read-max=rm,bps-write-max=wm`` 1505e2fcbf42SPeter Maydell Specify bursts in bytes per second, either for all request types 1506e2fcbf42SPeter Maydell or for reads or writes only. Bursts allow the guest I/O to spike 1507e2fcbf42SPeter Maydell above the limit temporarily. 1508e2fcbf42SPeter Maydell 1509e2fcbf42SPeter Maydell ``throttling.iops-total=i,throttling.iops-read=r, throttling.iops-write=w`` 1510e2fcbf42SPeter Maydell Specify request rate limits in requests per second, either for 1511e2fcbf42SPeter Maydell all request types or for reads or writes only. 1512e2fcbf42SPeter Maydell 1513e2fcbf42SPeter Maydell ``throttling.iops-total-max=im,throttling.iops-read-max=irm, throttling.iops-write-max=iwm`` 1514e2fcbf42SPeter Maydell Specify bursts in requests per second, either for all request 1515e2fcbf42SPeter Maydell types or for reads or writes only. Bursts allow the guest I/O to 1516e2fcbf42SPeter Maydell spike above the limit temporarily. 1517e2fcbf42SPeter Maydell 1518e2fcbf42SPeter Maydell ``throttling.iops-size=is`` 1519e2fcbf42SPeter Maydell Let every is bytes of a request count as a new request for iops 1520e2fcbf42SPeter Maydell throttling purposes. 1521e2fcbf42SPeter Maydell 1522e2fcbf42SPeter Maydell -fsdev option is used along with -device driver "virtio-9p-...". 1523e2fcbf42SPeter Maydell 1524e2fcbf42SPeter Maydell``-device virtio-9p-type,fsdev=id,mount_tag=mount_tag`` 1525e2fcbf42SPeter Maydell Options for virtio-9p-... driver are: 1526e2fcbf42SPeter Maydell 1527e2fcbf42SPeter Maydell ``type`` 1528e2fcbf42SPeter Maydell Specifies the variant to be used. Supported values are "pci", 1529e2fcbf42SPeter Maydell "ccw" or "device", depending on the machine type. 1530e2fcbf42SPeter Maydell 1531e2fcbf42SPeter Maydell ``fsdev=id`` 1532e2fcbf42SPeter Maydell Specifies the id value specified along with -fsdev option. 1533e2fcbf42SPeter Maydell 1534e2fcbf42SPeter Maydell ``mount_tag=mount_tag`` 1535e2fcbf42SPeter Maydell Specifies the tag name to be used by the guest to mount this 1536e2fcbf42SPeter Maydell export point. 1537e2fcbf42SPeter MaydellERST 153874db920cSGautham R Shenoy 15393d54abc7SGautham R ShenoyDEF("virtfs", HAS_ARG, QEMU_OPTION_virtfs, 1540b44a6b09SGreg Kurz "-virtfs local,path=path,mount_tag=tag,security_model=mapped-xattr|mapped-file|passthrough|none\n" 15411a6ed33cSAntonios Motakis " [,id=id][,writeout=immediate][,readonly][,fmode=fmode][,dmode=dmode][,multidevs=remap|forbid|warn]\n" 1542b44a6b09SGreg Kurz "-virtfs proxy,mount_tag=tag,socket=socket[,id=id][,writeout=immediate][,readonly]\n" 1543b44a6b09SGreg Kurz "-virtfs proxy,mount_tag=tag,sock_fd=sock_fd[,id=id][,writeout=immediate][,readonly]\n" 1544b44a6b09SGreg Kurz "-virtfs synth,mount_tag=tag[,id=id][,readonly]\n", 15453d54abc7SGautham R Shenoy QEMU_ARCH_ALL) 15463d54abc7SGautham R Shenoy 1547e2fcbf42SPeter MaydellSRST 154809ce5f2dSPeter Maydell``-virtfs local,path=path,mount_tag=mount_tag ,security_model=security_model[,writeout=writeout][,readonly] [,fmode=fmode][,dmode=dmode][,multidevs=multidevs]`` 154909ce5f2dSPeter Maydell \ 155009ce5f2dSPeter Maydell``-virtfs proxy,socket=socket,mount_tag=mount_tag [,writeout=writeout][,readonly]`` 155109ce5f2dSPeter Maydell \ 155209ce5f2dSPeter Maydell``-virtfs proxy,sock_fd=sock_fd,mount_tag=mount_tag [,writeout=writeout][,readonly]`` 155309ce5f2dSPeter Maydell \ 155409ce5f2dSPeter Maydell``-virtfs synth,mount_tag=mount_tag`` 155565abaa01SChristian Schoenebeck Define a new virtual filesystem device and expose it to the guest using 155665abaa01SChristian Schoenebeck a virtio-9p-device (a.k.a. 9pfs), which essentially means that a certain 155765abaa01SChristian Schoenebeck directory on host is made directly accessible by guest as a pass-through 155865abaa01SChristian Schoenebeck file system by using the 9P network protocol for communication between 155965abaa01SChristian Schoenebeck host and guests, if desired even accessible, shared by several guests 156065abaa01SChristian Schoenebeck simultaniously. 156165abaa01SChristian Schoenebeck 156265abaa01SChristian Schoenebeck Note that ``-virtfs`` is actually just a convenience shortcut for its 156365abaa01SChristian Schoenebeck generalized form ``-fsdev -device virtio-9p-pci``. 156465abaa01SChristian Schoenebeck 156565abaa01SChristian Schoenebeck The general form of pass-through file system options are: 1566e2fcbf42SPeter Maydell 1567e2fcbf42SPeter Maydell ``local`` 1568e2fcbf42SPeter Maydell Accesses to the filesystem are done by QEMU. 1569e2fcbf42SPeter Maydell 1570e2fcbf42SPeter Maydell ``proxy`` 1571e2fcbf42SPeter Maydell Accesses to the filesystem are done by virtfs-proxy-helper(1). 1572e2fcbf42SPeter Maydell 1573e2fcbf42SPeter Maydell ``synth`` 1574e2fcbf42SPeter Maydell Synthetic filesystem, only used by QTests. 1575e2fcbf42SPeter Maydell 1576e2fcbf42SPeter Maydell ``id=id`` 1577e2fcbf42SPeter Maydell Specifies identifier for the filesystem device 1578e2fcbf42SPeter Maydell 1579e2fcbf42SPeter Maydell ``path=path`` 1580e2fcbf42SPeter Maydell Specifies the export path for the file system device. Files 1581e2fcbf42SPeter Maydell under this path will be available to the 9p client on the guest. 1582e2fcbf42SPeter Maydell 1583e2fcbf42SPeter Maydell ``security_model=security_model`` 1584e2fcbf42SPeter Maydell Specifies the security model to be used for this export path. 1585e2fcbf42SPeter Maydell Supported security models are "passthrough", "mapped-xattr", 1586e2fcbf42SPeter Maydell "mapped-file" and "none". In "passthrough" security model, files 1587e2fcbf42SPeter Maydell are stored using the same credentials as they are created on the 1588e2fcbf42SPeter Maydell guest. This requires QEMU to run as root. In "mapped-xattr" 1589e2fcbf42SPeter Maydell security model, some of the file attributes like uid, gid, mode 1590e2fcbf42SPeter Maydell bits and link target are stored as file attributes. For 1591e2fcbf42SPeter Maydell "mapped-file" these attributes are stored in the hidden 1592e2fcbf42SPeter Maydell .virtfs\_metadata directory. Directories exported by this 1593e2fcbf42SPeter Maydell security model cannot interact with other unix tools. "none" 1594e2fcbf42SPeter Maydell security model is same as passthrough except the sever won't 1595e2fcbf42SPeter Maydell report failures if it fails to set file attributes like 1596e2fcbf42SPeter Maydell ownership. Security model is mandatory only for local fsdriver. 1597e2fcbf42SPeter Maydell Other fsdrivers (like proxy) don't take security model as a 1598e2fcbf42SPeter Maydell parameter. 1599e2fcbf42SPeter Maydell 1600e2fcbf42SPeter Maydell ``writeout=writeout`` 1601e2fcbf42SPeter Maydell This is an optional argument. The only supported value is 1602e2fcbf42SPeter Maydell "immediate". This means that host page cache will be used to 1603e2fcbf42SPeter Maydell read and write data but write notification will be sent to the 1604e2fcbf42SPeter Maydell guest only when the data has been reported as written by the 1605e2fcbf42SPeter Maydell storage subsystem. 1606e2fcbf42SPeter Maydell 1607e2fcbf42SPeter Maydell ``readonly`` 1608e2fcbf42SPeter Maydell Enables exporting 9p share as a readonly mount for guests. By 1609e2fcbf42SPeter Maydell default read-write access is given. 1610e2fcbf42SPeter Maydell 1611e2fcbf42SPeter Maydell ``socket=socket`` 1612e2fcbf42SPeter Maydell Enables proxy filesystem driver to use passed socket file for 1613e2fcbf42SPeter Maydell communicating with virtfs-proxy-helper(1). Usually a helper like 1614e2fcbf42SPeter Maydell libvirt will create socketpair and pass one of the fds as 1615e2fcbf42SPeter Maydell sock\_fd. 1616e2fcbf42SPeter Maydell 1617e2fcbf42SPeter Maydell ``sock_fd`` 1618e2fcbf42SPeter Maydell Enables proxy filesystem driver to use passed 'sock\_fd' as the 1619e2fcbf42SPeter Maydell socket descriptor for interfacing with virtfs-proxy-helper(1). 1620e2fcbf42SPeter Maydell 1621e2fcbf42SPeter Maydell ``fmode=fmode`` 1622e2fcbf42SPeter Maydell Specifies the default mode for newly created files on the host. 1623e2fcbf42SPeter Maydell Works only with security models "mapped-xattr" and 1624e2fcbf42SPeter Maydell "mapped-file". 1625e2fcbf42SPeter Maydell 1626e2fcbf42SPeter Maydell ``dmode=dmode`` 1627e2fcbf42SPeter Maydell Specifies the default mode for newly created directories on the 1628e2fcbf42SPeter Maydell host. Works only with security models "mapped-xattr" and 1629e2fcbf42SPeter Maydell "mapped-file". 1630e2fcbf42SPeter Maydell 1631e2fcbf42SPeter Maydell ``mount_tag=mount_tag`` 1632e2fcbf42SPeter Maydell Specifies the tag name to be used by the guest to mount this 1633e2fcbf42SPeter Maydell export point. 1634e2fcbf42SPeter Maydell 1635e2fcbf42SPeter Maydell ``multidevs=multidevs`` 1636e2fcbf42SPeter Maydell Specifies how to deal with multiple devices being shared with a 1637e2fcbf42SPeter Maydell 9p export. Supported behaviours are either "remap", "forbid" or 1638e2fcbf42SPeter Maydell "warn". The latter is the default behaviour on which virtfs 9p 1639e2fcbf42SPeter Maydell expects only one device to be shared with the same export, and 1640e2fcbf42SPeter Maydell if more than one device is shared and accessed via the same 9p 1641e2fcbf42SPeter Maydell export then only a warning message is logged (once) by qemu on 1642e2fcbf42SPeter Maydell host side. In order to avoid file ID collisions on guest you 1643e2fcbf42SPeter Maydell should either create a separate virtfs export for each device to 1644e2fcbf42SPeter Maydell be shared with guests (recommended way) or you might use "remap" 1645e2fcbf42SPeter Maydell instead which allows you to share multiple devices with only one 1646e2fcbf42SPeter Maydell export instead, which is achieved by remapping the original 1647e2fcbf42SPeter Maydell inode numbers from host to guest in a way that would prevent 1648e2fcbf42SPeter Maydell such collisions. Remapping inodes in such use cases is required 1649e2fcbf42SPeter Maydell because the original device IDs from host are never passed and 1650e2fcbf42SPeter Maydell exposed on guest. Instead all files of an export shared with 1651e2fcbf42SPeter Maydell virtfs always share the same device id on guest. So two files 1652e2fcbf42SPeter Maydell with identical inode numbers but from actually different devices 1653e2fcbf42SPeter Maydell on host would otherwise cause a file ID collision and hence 1654e2fcbf42SPeter Maydell potential misbehaviours on guest. "forbid" on the other hand 1655e2fcbf42SPeter Maydell assumes like "warn" that only one device is shared by the same 1656e2fcbf42SPeter Maydell export, however it will not only log a warning message but also 1657e2fcbf42SPeter Maydell deny access to additional devices on guest. Note though that 1658e2fcbf42SPeter Maydell "forbid" does currently not block all possible file access 1659e2fcbf42SPeter Maydell operations (e.g. readdir() would still return entries from other 1660e2fcbf42SPeter Maydell devices). 1661e2fcbf42SPeter MaydellERST 16623d54abc7SGautham R Shenoy 166361d70487SMarkus ArmbrusterDEF("iscsi", HAS_ARG, QEMU_OPTION_iscsi, 166461d70487SMarkus Armbruster "-iscsi [user=user][,password=password]\n" 166561d70487SMarkus Armbruster " [,header-digest=CRC32C|CR32C-NONE|NONE-CRC32C|NONE\n" 166661d70487SMarkus Armbruster " [,initiator-name=initiator-iqn][,id=target-iqn]\n" 166761d70487SMarkus Armbruster " [,timeout=timeout]\n" 166861d70487SMarkus Armbruster " iSCSI session parameters\n", QEMU_ARCH_ALL) 166961d70487SMarkus Armbruster 1670e2fcbf42SPeter MaydellSRST 1671e2fcbf42SPeter Maydell``-iscsi`` 1672e2fcbf42SPeter Maydell Configure iSCSI session parameters. 1673e2fcbf42SPeter MaydellERST 167444743148SMarkus Armbruster 16755824d651Sblueswir1DEFHEADING() 16765824d651Sblueswir1 1677de6b4f90SMarkus ArmbrusterDEFHEADING(USB options:) 167810adb8beSMarkus Armbruster 167910adb8beSMarkus ArmbrusterDEF("usb", 0, QEMU_OPTION_usb, 168073f46fefSStefan Hajnoczi "-usb enable on-board USB host controller (if not enabled by default)\n", 168110adb8beSMarkus Armbruster QEMU_ARCH_ALL) 1682e2fcbf42SPeter MaydellSRST 1683e2fcbf42SPeter Maydell``-usb`` 1684e2fcbf42SPeter Maydell Enable USB emulation on machine types with an on-board USB host 1685e2fcbf42SPeter Maydell controller (if not enabled by default). Note that on-board USB host 1686e2fcbf42SPeter Maydell controllers may not support USB 3.0. In this case 1687e2fcbf42SPeter Maydell ``-device qemu-xhci`` can be used instead on machines with PCI. 1688e2fcbf42SPeter MaydellERST 168910adb8beSMarkus Armbruster 169010adb8beSMarkus ArmbrusterDEF("usbdevice", HAS_ARG, QEMU_OPTION_usbdevice, 169110adb8beSMarkus Armbruster "-usbdevice name add the host or guest USB device 'name'\n", 169210adb8beSMarkus Armbruster QEMU_ARCH_ALL) 1693e2fcbf42SPeter MaydellSRST 1694e2fcbf42SPeter Maydell``-usbdevice devname`` 1695e2fcbf42SPeter Maydell Add the USB device devname. Note that this option is deprecated, 1696e2fcbf42SPeter Maydell please use ``-device usb-...`` instead. See 1697e2fcbf42SPeter Maydell :ref:`usb_005fdevices`. 1698e2fcbf42SPeter Maydell 1699e2fcbf42SPeter Maydell ``mouse`` 1700e2fcbf42SPeter Maydell Virtual Mouse. This will override the PS/2 mouse emulation when 1701e2fcbf42SPeter Maydell activated. 1702e2fcbf42SPeter Maydell 1703e2fcbf42SPeter Maydell ``tablet`` 1704e2fcbf42SPeter Maydell Pointer device that uses absolute coordinates (like a 1705e2fcbf42SPeter Maydell touchscreen). This means QEMU is able to report the mouse 1706e2fcbf42SPeter Maydell position without having to grab the mouse. Also overrides the 1707e2fcbf42SPeter Maydell PS/2 mouse emulation when activated. 1708e2fcbf42SPeter Maydell 1709e2fcbf42SPeter Maydell ``braille`` 1710e2fcbf42SPeter Maydell Braille device. This will use BrlAPI to display the braille 1711e2fcbf42SPeter Maydell output on a real or fake device. 1712e2fcbf42SPeter MaydellERST 171310adb8beSMarkus Armbruster 171410adb8beSMarkus ArmbrusterDEFHEADING() 171510adb8beSMarkus Armbruster 1716de6b4f90SMarkus ArmbrusterDEFHEADING(Display options:) 17175824d651Sblueswir1 17181472a95bSJes SorensenDEF("display", HAS_ARG, QEMU_OPTION_display, 171988b40c68SThomas Huth#if defined(CONFIG_SPICE) 1720d8aec9d9SMarc-André Lureau "-display spice-app[,gl=on|off]\n" 172188b40c68SThomas Huth#endif 172288b40c68SThomas Huth#if defined(CONFIG_SDL) 172388b40c68SThomas Huth "-display sdl[,alt_grab=on|off][,ctrl_grab=on|off]\n" 17244867e47cSElie Tournier " [,window_close=on|off][,gl=on|core|es|off]\n" 172588b40c68SThomas Huth#endif 172688b40c68SThomas Huth#if defined(CONFIG_GTK) 1727f04ec5afSRobert Ho "-display gtk[,grab_on_hover=on|off][,gl=on|off]|\n" 172888b40c68SThomas Huth#endif 172988b40c68SThomas Huth#if defined(CONFIG_VNC) 1730f04ec5afSRobert Ho "-display vnc=<display>[,<optargs>]\n" 173188b40c68SThomas Huth#endif 173288b40c68SThomas Huth#if defined(CONFIG_CURSES) 17332f8b7cd5SSamuel Thibault "-display curses[,charset=<encoding>]\n" 173488b40c68SThomas Huth#endif 173588b40c68SThomas Huth#if defined(CONFIG_OPENGL) 173688b40c68SThomas Huth "-display egl-headless[,rendernode=<file>]\n" 173788b40c68SThomas Huth#endif 1738144aaa99SErik Skultety "-display none\n" 173988b40c68SThomas Huth " select display backend type\n" 1740f04ec5afSRobert Ho " The default display is equivalent to\n " 1741f04ec5afSRobert Ho#if defined(CONFIG_GTK) 174288b40c68SThomas Huth "\"-display gtk\"\n" 1743f04ec5afSRobert Ho#elif defined(CONFIG_SDL) 174488b40c68SThomas Huth "\"-display sdl\"\n" 1745f04ec5afSRobert Ho#elif defined(CONFIG_COCOA) 174688b40c68SThomas Huth "\"-display cocoa\"\n" 1747f04ec5afSRobert Ho#elif defined(CONFIG_VNC) 174888b40c68SThomas Huth "\"-vnc localhost:0,to=99,id=default\"\n" 1749f04ec5afSRobert Ho#else 175088b40c68SThomas Huth "\"-display none\"\n" 1751f04ec5afSRobert Ho#endif 1752f04ec5afSRobert Ho , QEMU_ARCH_ALL) 1753e2fcbf42SPeter MaydellSRST 1754e2fcbf42SPeter Maydell``-display type`` 1755e2fcbf42SPeter Maydell Select type of display to use. This option is a replacement for the 1756e2fcbf42SPeter Maydell old style -sdl/-curses/... options. Use ``-display help`` to list 1757e2fcbf42SPeter Maydell the available display types. Valid values for type are 1758e2fcbf42SPeter Maydell 1759e2fcbf42SPeter Maydell ``sdl`` 1760e2fcbf42SPeter Maydell Display video output via SDL (usually in a separate graphics 1761e2fcbf42SPeter Maydell window; see the SDL documentation for other possibilities). 1762e2fcbf42SPeter Maydell 1763e2fcbf42SPeter Maydell ``curses`` 1764e2fcbf42SPeter Maydell Display video output via curses. For graphics device models 1765e2fcbf42SPeter Maydell which support a text mode, QEMU can display this output using a 1766e2fcbf42SPeter Maydell curses/ncurses interface. Nothing is displayed when the graphics 1767e2fcbf42SPeter Maydell device is in graphical mode or if the graphics device does not 1768e2fcbf42SPeter Maydell support a text mode. Generally only the VGA device models 1769e2fcbf42SPeter Maydell support text mode. The font charset used by the guest can be 1770e2fcbf42SPeter Maydell specified with the ``charset`` option, for example 1771e2fcbf42SPeter Maydell ``charset=CP850`` for IBM CP850 encoding. The default is 1772e2fcbf42SPeter Maydell ``CP437``. 1773e2fcbf42SPeter Maydell 1774e2fcbf42SPeter Maydell ``none`` 1775e2fcbf42SPeter Maydell Do not display video output. The guest will still see an 1776e2fcbf42SPeter Maydell emulated graphics card, but its output will not be displayed to 1777e2fcbf42SPeter Maydell the QEMU user. This option differs from the -nographic option in 1778e2fcbf42SPeter Maydell that it only affects what is done with video output; -nographic 1779e2fcbf42SPeter Maydell also changes the destination of the serial and parallel port 1780e2fcbf42SPeter Maydell data. 1781e2fcbf42SPeter Maydell 1782e2fcbf42SPeter Maydell ``gtk`` 1783e2fcbf42SPeter Maydell Display video output in a GTK window. This interface provides 1784e2fcbf42SPeter Maydell drop-down menus and other UI elements to configure and control 1785e2fcbf42SPeter Maydell the VM during runtime. 1786e2fcbf42SPeter Maydell 1787e2fcbf42SPeter Maydell ``vnc`` 1788e2fcbf42SPeter Maydell Start a VNC server on display <arg> 1789e2fcbf42SPeter Maydell 1790e2fcbf42SPeter Maydell ``egl-headless`` 1791e2fcbf42SPeter Maydell Offload all OpenGL operations to a local DRI device. For any 1792e2fcbf42SPeter Maydell graphical display, this display needs to be paired with either 1793e2fcbf42SPeter Maydell VNC or SPICE displays. 1794e2fcbf42SPeter Maydell 1795e2fcbf42SPeter Maydell ``spice-app`` 1796e2fcbf42SPeter Maydell Start QEMU as a Spice server and launch the default Spice client 1797e2fcbf42SPeter Maydell application. The Spice server will redirect the serial consoles 1798e2fcbf42SPeter Maydell and QEMU monitors. (Since 4.0) 1799e2fcbf42SPeter MaydellERST 18001472a95bSJes Sorensen 18015824d651Sblueswir1DEF("nographic", 0, QEMU_OPTION_nographic, 1802ad96090aSBlue Swirl "-nographic disable graphical output and redirect serial I/Os to console\n", 1803ad96090aSBlue Swirl QEMU_ARCH_ALL) 1804e2fcbf42SPeter MaydellSRST 1805e2fcbf42SPeter Maydell``-nographic`` 1806e2fcbf42SPeter Maydell Normally, if QEMU is compiled with graphical window support, it 1807e2fcbf42SPeter Maydell displays output such as guest graphics, guest console, and the QEMU 1808e2fcbf42SPeter Maydell monitor in a window. With this option, you can totally disable 1809e2fcbf42SPeter Maydell graphical output so that QEMU is a simple command line application. 1810e2fcbf42SPeter Maydell The emulated serial port is redirected on the console and muxed with 1811e2fcbf42SPeter Maydell the monitor (unless redirected elsewhere explicitly). Therefore, you 1812e2fcbf42SPeter Maydell can still use QEMU to debug a Linux kernel with a serial console. 1813e2fcbf42SPeter Maydell Use C-a h for help on switching between the console and monitor. 1814e2fcbf42SPeter MaydellERST 18155824d651Sblueswir1 18165824d651Sblueswir1DEF("curses", 0, QEMU_OPTION_curses, 1817f04ec5afSRobert Ho "-curses shorthand for -display curses\n", 1818ad96090aSBlue Swirl QEMU_ARCH_ALL) 1819e2fcbf42SPeter MaydellSRST 1820e2fcbf42SPeter Maydell``-curses`` 1821e2fcbf42SPeter Maydell Normally, if QEMU is compiled with graphical window support, it 1822e2fcbf42SPeter Maydell displays output such as guest graphics, guest console, and the QEMU 1823e2fcbf42SPeter Maydell monitor in a window. With this option, QEMU can display the VGA 1824e2fcbf42SPeter Maydell output when in text mode using a curses/ncurses interface. Nothing 1825e2fcbf42SPeter Maydell is displayed in graphical mode. 1826e2fcbf42SPeter MaydellERST 18275824d651Sblueswir1 18285824d651Sblueswir1DEF("alt-grab", 0, QEMU_OPTION_alt_grab, 1829ad96090aSBlue Swirl "-alt-grab use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt)\n", 1830ad96090aSBlue Swirl QEMU_ARCH_ALL) 1831e2fcbf42SPeter MaydellSRST 1832e2fcbf42SPeter Maydell``-alt-grab`` 1833e2fcbf42SPeter Maydell Use Ctrl-Alt-Shift to grab mouse (instead of Ctrl-Alt). Note that 1834e2fcbf42SPeter Maydell this also affects the special keys (for fullscreen, monitor-mode 1835e2fcbf42SPeter Maydell switching, etc). 1836e2fcbf42SPeter MaydellERST 18375824d651Sblueswir1 18380ca9f8a4SDustin KirklandDEF("ctrl-grab", 0, QEMU_OPTION_ctrl_grab, 1839ad96090aSBlue Swirl "-ctrl-grab use Right-Ctrl to grab mouse (instead of Ctrl-Alt)\n", 1840ad96090aSBlue Swirl QEMU_ARCH_ALL) 1841e2fcbf42SPeter MaydellSRST 1842e2fcbf42SPeter Maydell``-ctrl-grab`` 1843e2fcbf42SPeter Maydell Use Right-Ctrl to grab mouse (instead of Ctrl-Alt). Note that this 1844e2fcbf42SPeter Maydell also affects the special keys (for fullscreen, monitor-mode 1845e2fcbf42SPeter Maydell switching, etc). 1846e2fcbf42SPeter MaydellERST 18470ca9f8a4SDustin Kirkland 18485824d651Sblueswir1DEF("no-quit", 0, QEMU_OPTION_no_quit, 1849ad96090aSBlue Swirl "-no-quit disable SDL window close capability\n", QEMU_ARCH_ALL) 1850e2fcbf42SPeter MaydellSRST 1851e2fcbf42SPeter Maydell``-no-quit`` 1852e2fcbf42SPeter Maydell Disable SDL window close capability. 1853e2fcbf42SPeter MaydellERST 18545824d651Sblueswir1 18555824d651Sblueswir1DEF("sdl", 0, QEMU_OPTION_sdl, 1856f04ec5afSRobert Ho "-sdl shorthand for -display sdl\n", QEMU_ARCH_ALL) 1857e2fcbf42SPeter MaydellSRST 1858e2fcbf42SPeter Maydell``-sdl`` 1859e2fcbf42SPeter Maydell Enable SDL. 1860e2fcbf42SPeter MaydellERST 18615824d651Sblueswir1 186229b0040bSGerd HoffmannDEF("spice", HAS_ARG, QEMU_OPTION_spice, 186327af7788SYonit Halperin "-spice [port=port][,tls-port=secured-port][,x509-dir=<dir>]\n" 186427af7788SYonit Halperin " [,x509-key-file=<file>][,x509-key-password=<file>]\n" 186527af7788SYonit Halperin " [,x509-cert-file=<file>][,x509-cacert-file=<file>]\n" 1866fe4831b1SMarc-André Lureau " [,x509-dh-key-file=<file>][,addr=addr][,ipv4|ipv6|unix]\n" 186727af7788SYonit Halperin " [,tls-ciphers=<list>]\n" 186827af7788SYonit Halperin " [,tls-channel=[main|display|cursor|inputs|record|playback]]\n" 186927af7788SYonit Halperin " [,plaintext-channel=[main|display|cursor|inputs|record|playback]]\n" 187027af7788SYonit Halperin " [,sasl][,password=<secret>][,disable-ticketing]\n" 187127af7788SYonit Halperin " [,image-compression=[auto_glz|auto_lz|quic|glz|lz|off]]\n" 187227af7788SYonit Halperin " [,jpeg-wan-compression=[auto|never|always]]\n" 187327af7788SYonit Halperin " [,zlib-glz-wan-compression=[auto|never|always]]\n" 187427af7788SYonit Halperin " [,streaming-video=[off|all|filter]][,disable-copy-paste]\n" 18755ad24e5fSHans de Goede " [,disable-agent-file-xfer][,agent-mouse=[on|off]]\n" 18765ad24e5fSHans de Goede " [,playback-compression=[on|off]][,seamless-migration=[on|off]]\n" 18777b525508SMarc-André Lureau " [,gl=[on|off]][,rendernode=<file>]\n" 187827af7788SYonit Halperin " enable spice\n" 187927af7788SYonit Halperin " at least one of {port, tls-port} is mandatory\n", 188027af7788SYonit Halperin QEMU_ARCH_ALL) 1881e2fcbf42SPeter MaydellSRST 1882e2fcbf42SPeter Maydell``-spice option[,option[,...]]`` 1883e2fcbf42SPeter Maydell Enable the spice remote desktop protocol. Valid options are 1884e2fcbf42SPeter Maydell 1885e2fcbf42SPeter Maydell ``port=<nr>`` 1886e2fcbf42SPeter Maydell Set the TCP port spice is listening on for plaintext channels. 1887e2fcbf42SPeter Maydell 1888e2fcbf42SPeter Maydell ``addr=<addr>`` 1889e2fcbf42SPeter Maydell Set the IP address spice is listening on. Default is any 1890e2fcbf42SPeter Maydell address. 1891e2fcbf42SPeter Maydell 1892e2fcbf42SPeter Maydell ``ipv4``; \ ``ipv6``; \ ``unix`` 1893e2fcbf42SPeter Maydell Force using the specified IP version. 1894e2fcbf42SPeter Maydell 1895e2fcbf42SPeter Maydell ``password=<secret>`` 1896e2fcbf42SPeter Maydell Set the password you need to authenticate. 1897e2fcbf42SPeter Maydell 1898e2fcbf42SPeter Maydell ``sasl`` 1899e2fcbf42SPeter Maydell Require that the client use SASL to authenticate with the spice. 1900e2fcbf42SPeter Maydell The exact choice of authentication method used is controlled 1901e2fcbf42SPeter Maydell from the system / user's SASL configuration file for the 'qemu' 1902e2fcbf42SPeter Maydell service. This is typically found in /etc/sasl2/qemu.conf. If 1903e2fcbf42SPeter Maydell running QEMU as an unprivileged user, an environment variable 1904e2fcbf42SPeter Maydell SASL\_CONF\_PATH can be used to make it search alternate 1905e2fcbf42SPeter Maydell locations for the service config. While some SASL auth methods 1906e2fcbf42SPeter Maydell can also provide data encryption (eg GSSAPI), it is recommended 1907e2fcbf42SPeter Maydell that SASL always be combined with the 'tls' and 'x509' settings 1908e2fcbf42SPeter Maydell to enable use of SSL and server certificates. This ensures a 1909e2fcbf42SPeter Maydell data encryption preventing compromise of authentication 1910e2fcbf42SPeter Maydell credentials. 1911e2fcbf42SPeter Maydell 1912e2fcbf42SPeter Maydell ``disable-ticketing`` 1913e2fcbf42SPeter Maydell Allow client connects without authentication. 1914e2fcbf42SPeter Maydell 1915e2fcbf42SPeter Maydell ``disable-copy-paste`` 1916e2fcbf42SPeter Maydell Disable copy paste between the client and the guest. 1917e2fcbf42SPeter Maydell 1918e2fcbf42SPeter Maydell ``disable-agent-file-xfer`` 1919e2fcbf42SPeter Maydell Disable spice-vdagent based file-xfer between the client and the 1920e2fcbf42SPeter Maydell guest. 1921e2fcbf42SPeter Maydell 1922e2fcbf42SPeter Maydell ``tls-port=<nr>`` 1923e2fcbf42SPeter Maydell Set the TCP port spice is listening on for encrypted channels. 1924e2fcbf42SPeter Maydell 1925e2fcbf42SPeter Maydell ``x509-dir=<dir>`` 1926e2fcbf42SPeter Maydell Set the x509 file directory. Expects same filenames as -vnc 1927e2fcbf42SPeter Maydell $display,x509=$dir 1928e2fcbf42SPeter Maydell 1929e2fcbf42SPeter Maydell ``x509-key-file=<file>``; \ ``x509-key-password=<file>``; \ ``x509-cert-file=<file>``; \ ``x509-cacert-file=<file>``; \ ``x509-dh-key-file=<file>`` 1930e2fcbf42SPeter Maydell The x509 file names can also be configured individually. 1931e2fcbf42SPeter Maydell 1932e2fcbf42SPeter Maydell ``tls-ciphers=<list>`` 1933e2fcbf42SPeter Maydell Specify which ciphers to use. 1934e2fcbf42SPeter Maydell 1935e2fcbf42SPeter Maydell ``tls-channel=[main|display|cursor|inputs|record|playback]``; \ ``plaintext-channel=[main|display|cursor|inputs|record|playback]`` 1936e2fcbf42SPeter Maydell Force specific channel to be used with or without TLS 1937e2fcbf42SPeter Maydell encryption. The options can be specified multiple times to 1938e2fcbf42SPeter Maydell configure multiple channels. The special name "default" can be 1939e2fcbf42SPeter Maydell used to set the default mode. For channels which are not 1940e2fcbf42SPeter Maydell explicitly forced into one mode the spice client is allowed to 1941e2fcbf42SPeter Maydell pick tls/plaintext as he pleases. 1942e2fcbf42SPeter Maydell 1943e2fcbf42SPeter Maydell ``image-compression=[auto_glz|auto_lz|quic|glz|lz|off]`` 1944e2fcbf42SPeter Maydell Configure image compression (lossless). Default is auto\_glz. 1945e2fcbf42SPeter Maydell 1946e2fcbf42SPeter Maydell ``jpeg-wan-compression=[auto|never|always]``; \ ``zlib-glz-wan-compression=[auto|never|always]`` 1947e2fcbf42SPeter Maydell Configure wan image compression (lossy for slow links). Default 1948e2fcbf42SPeter Maydell is auto. 1949e2fcbf42SPeter Maydell 1950e2fcbf42SPeter Maydell ``streaming-video=[off|all|filter]`` 1951e2fcbf42SPeter Maydell Configure video stream detection. Default is off. 1952e2fcbf42SPeter Maydell 1953e2fcbf42SPeter Maydell ``agent-mouse=[on|off]`` 1954e2fcbf42SPeter Maydell Enable/disable passing mouse events via vdagent. Default is on. 1955e2fcbf42SPeter Maydell 1956e2fcbf42SPeter Maydell ``playback-compression=[on|off]`` 1957e2fcbf42SPeter Maydell Enable/disable audio stream compression (using celt 0.5.1). 1958e2fcbf42SPeter Maydell Default is on. 1959e2fcbf42SPeter Maydell 1960e2fcbf42SPeter Maydell ``seamless-migration=[on|off]`` 1961e2fcbf42SPeter Maydell Enable/disable spice seamless migration. Default is off. 1962e2fcbf42SPeter Maydell 1963e2fcbf42SPeter Maydell ``gl=[on|off]`` 1964e2fcbf42SPeter Maydell Enable/disable OpenGL context. Default is off. 1965e2fcbf42SPeter Maydell 1966e2fcbf42SPeter Maydell ``rendernode=<file>`` 1967e2fcbf42SPeter Maydell DRM render node for OpenGL rendering. If not specified, it will 1968e2fcbf42SPeter Maydell pick the first available. (Since 2.9) 1969e2fcbf42SPeter MaydellERST 197029b0040bSGerd Hoffmann 19715824d651Sblueswir1DEF("portrait", 0, QEMU_OPTION_portrait, 1972ad96090aSBlue Swirl "-portrait rotate graphical output 90 deg left (only PXA LCD)\n", 1973ad96090aSBlue Swirl QEMU_ARCH_ALL) 1974e2fcbf42SPeter MaydellSRST 1975e2fcbf42SPeter Maydell``-portrait`` 1976e2fcbf42SPeter Maydell Rotate graphical output 90 deg left (only PXA LCD). 1977e2fcbf42SPeter MaydellERST 19785824d651Sblueswir1 19799312805dSVasily KhoruzhickDEF("rotate", HAS_ARG, QEMU_OPTION_rotate, 19809312805dSVasily Khoruzhick "-rotate <deg> rotate graphical output some deg left (only PXA LCD)\n", 19819312805dSVasily Khoruzhick QEMU_ARCH_ALL) 1982e2fcbf42SPeter MaydellSRST 1983e2fcbf42SPeter Maydell``-rotate deg`` 1984e2fcbf42SPeter Maydell Rotate graphical output some deg left (only PXA LCD). 1985e2fcbf42SPeter MaydellERST 19869312805dSVasily Khoruzhick 19875824d651Sblueswir1DEF("vga", HAS_ARG, QEMU_OPTION_vga, 1988a94f0c5cSGerd Hoffmann "-vga [std|cirrus|vmware|qxl|xenfb|tcx|cg3|virtio|none]\n" 1989ad96090aSBlue Swirl " select video card type\n", QEMU_ARCH_ALL) 1990e2fcbf42SPeter MaydellSRST 1991e2fcbf42SPeter Maydell``-vga type`` 1992e2fcbf42SPeter Maydell Select type of VGA card to emulate. Valid values for type are 1993e2fcbf42SPeter Maydell 1994e2fcbf42SPeter Maydell ``cirrus`` 1995e2fcbf42SPeter Maydell Cirrus Logic GD5446 Video card. All Windows versions starting 1996e2fcbf42SPeter Maydell from Windows 95 should recognize and use this graphic card. For 1997e2fcbf42SPeter Maydell optimal performances, use 16 bit color depth in the guest and 1998e2fcbf42SPeter Maydell the host OS. (This card was the default before QEMU 2.2) 1999e2fcbf42SPeter Maydell 2000e2fcbf42SPeter Maydell ``std`` 2001e2fcbf42SPeter Maydell Standard VGA card with Bochs VBE extensions. If your guest OS 2002e2fcbf42SPeter Maydell supports the VESA 2.0 VBE extensions (e.g. Windows XP) and if 2003e2fcbf42SPeter Maydell you want to use high resolution modes (>= 1280x1024x16) then you 2004e2fcbf42SPeter Maydell should use this option. (This card is the default since QEMU 2005e2fcbf42SPeter Maydell 2.2) 2006e2fcbf42SPeter Maydell 2007e2fcbf42SPeter Maydell ``vmware`` 2008e2fcbf42SPeter Maydell VMWare SVGA-II compatible adapter. Use it if you have 2009e2fcbf42SPeter Maydell sufficiently recent XFree86/XOrg server or Windows guest with a 2010e2fcbf42SPeter Maydell driver for this card. 2011e2fcbf42SPeter Maydell 2012e2fcbf42SPeter Maydell ``qxl`` 2013e2fcbf42SPeter Maydell QXL paravirtual graphic card. It is VGA compatible (including 2014e2fcbf42SPeter Maydell VESA 2.0 VBE support). Works best with qxl guest drivers 2015e2fcbf42SPeter Maydell installed though. Recommended choice when using the spice 2016e2fcbf42SPeter Maydell protocol. 2017e2fcbf42SPeter Maydell 2018e2fcbf42SPeter Maydell ``tcx`` 2019e2fcbf42SPeter Maydell (sun4m only) Sun TCX framebuffer. This is the default 2020e2fcbf42SPeter Maydell framebuffer for sun4m machines and offers both 8-bit and 24-bit 2021e2fcbf42SPeter Maydell colour depths at a fixed resolution of 1024x768. 2022e2fcbf42SPeter Maydell 2023e2fcbf42SPeter Maydell ``cg3`` 2024e2fcbf42SPeter Maydell (sun4m only) Sun cgthree framebuffer. This is a simple 8-bit 2025e2fcbf42SPeter Maydell framebuffer for sun4m machines available in both 1024x768 2026e2fcbf42SPeter Maydell (OpenBIOS) and 1152x900 (OBP) resolutions aimed at people 2027e2fcbf42SPeter Maydell wishing to run older Solaris versions. 2028e2fcbf42SPeter Maydell 2029e2fcbf42SPeter Maydell ``virtio`` 2030e2fcbf42SPeter Maydell Virtio VGA card. 2031e2fcbf42SPeter Maydell 2032e2fcbf42SPeter Maydell ``none`` 2033e2fcbf42SPeter Maydell Disable VGA card. 2034e2fcbf42SPeter MaydellERST 20355824d651Sblueswir1 20365824d651Sblueswir1DEF("full-screen", 0, QEMU_OPTION_full_screen, 2037ad96090aSBlue Swirl "-full-screen start in full screen\n", QEMU_ARCH_ALL) 2038e2fcbf42SPeter MaydellSRST 2039e2fcbf42SPeter Maydell``-full-screen`` 2040e2fcbf42SPeter Maydell Start in full screen. 2041e2fcbf42SPeter MaydellERST 20425824d651Sblueswir1 204360f9a4efSJohn SnowDEF("g", HAS_ARG, QEMU_OPTION_g , 2044ad96090aSBlue Swirl "-g WxH[xDEPTH] Set the initial graphical resolution and depth\n", 20458ac919a0SLaurent Vivier QEMU_ARCH_PPC | QEMU_ARCH_SPARC | QEMU_ARCH_M68K) 2046e2fcbf42SPeter MaydellSRST 204709ce5f2dSPeter Maydell``-g`` *width*\ ``x``\ *height*\ ``[x``\ *depth*\ ``]`` 2048e2fcbf42SPeter Maydell Set the initial graphical resolution and depth (PPC, SPARC only). 2049e2fcbf42SPeter Maydell 2050e2fcbf42SPeter Maydell For PPC the default is 800x600x32. 2051e2fcbf42SPeter Maydell 2052e2fcbf42SPeter Maydell For SPARC with the TCX graphics device, the default is 1024x768x8 2053e2fcbf42SPeter Maydell with the option of 1024x768x24. For cgthree, the default is 2054e2fcbf42SPeter Maydell 1024x768x8 with the option of 1152x900x8 for people who wish to use 2055e2fcbf42SPeter Maydell OBP. 2056e2fcbf42SPeter MaydellERST 20575824d651Sblueswir1 20585824d651Sblueswir1DEF("vnc", HAS_ARG, QEMU_OPTION_vnc , 2059f04ec5afSRobert Ho "-vnc <display> shorthand for -display vnc=<display>\n", QEMU_ARCH_ALL) 2060e2fcbf42SPeter MaydellSRST 2061e2fcbf42SPeter Maydell``-vnc display[,option[,option[,...]]]`` 2062e2fcbf42SPeter Maydell Normally, if QEMU is compiled with graphical window support, it 2063e2fcbf42SPeter Maydell displays output such as guest graphics, guest console, and the QEMU 2064e2fcbf42SPeter Maydell monitor in a window. With this option, you can have QEMU listen on 2065e2fcbf42SPeter Maydell VNC display display and redirect the VGA display over the VNC 2066e2fcbf42SPeter Maydell session. It is very useful to enable the usb tablet device when 2067e2fcbf42SPeter Maydell using this option (option ``-device usb-tablet``). When using the 2068e2fcbf42SPeter Maydell VNC display, you must use the ``-k`` parameter to set the keyboard 2069e2fcbf42SPeter Maydell layout if you are not using en-us. Valid syntax for the display is 2070e2fcbf42SPeter Maydell 2071e2fcbf42SPeter Maydell ``to=L`` 2072e2fcbf42SPeter Maydell With this option, QEMU will try next available VNC displays, 2073e2fcbf42SPeter Maydell until the number L, if the origianlly defined "-vnc display" is 2074e2fcbf42SPeter Maydell not available, e.g. port 5900+display is already used by another 2075e2fcbf42SPeter Maydell application. By default, to=0. 2076e2fcbf42SPeter Maydell 2077e2fcbf42SPeter Maydell ``host:d`` 2078e2fcbf42SPeter Maydell TCP connections will only be allowed from host on display d. By 2079e2fcbf42SPeter Maydell convention the TCP port is 5900+d. Optionally, host can be 2080e2fcbf42SPeter Maydell omitted in which case the server will accept connections from 2081e2fcbf42SPeter Maydell any host. 2082e2fcbf42SPeter Maydell 2083e2fcbf42SPeter Maydell ``unix:path`` 2084e2fcbf42SPeter Maydell Connections will be allowed over UNIX domain sockets where path 2085e2fcbf42SPeter Maydell is the location of a unix socket to listen for connections on. 2086e2fcbf42SPeter Maydell 2087e2fcbf42SPeter Maydell ``none`` 2088e2fcbf42SPeter Maydell VNC is initialized but not started. The monitor ``change`` 2089e2fcbf42SPeter Maydell command can be used to later start the VNC server. 2090e2fcbf42SPeter Maydell 2091e2fcbf42SPeter Maydell Following the display value there may be one or more option flags 2092e2fcbf42SPeter Maydell separated by commas. Valid options are 2093e2fcbf42SPeter Maydell 2094e2fcbf42SPeter Maydell ``reverse`` 2095e2fcbf42SPeter Maydell Connect to a listening VNC client via a "reverse" connection. 2096e2fcbf42SPeter Maydell The client is specified by the display. For reverse network 2097e2fcbf42SPeter Maydell connections (host:d,``reverse``), the d argument is a TCP port 2098e2fcbf42SPeter Maydell number, not a display number. 2099e2fcbf42SPeter Maydell 2100e2fcbf42SPeter Maydell ``websocket`` 2101e2fcbf42SPeter Maydell Opens an additional TCP listening port dedicated to VNC 2102e2fcbf42SPeter Maydell Websocket connections. If a bare websocket option is given, the 2103e2fcbf42SPeter Maydell Websocket port is 5700+display. An alternative port can be 2104e2fcbf42SPeter Maydell specified with the syntax ``websocket``\ =port. 2105e2fcbf42SPeter Maydell 2106e2fcbf42SPeter Maydell If host is specified connections will only be allowed from this 2107e2fcbf42SPeter Maydell host. It is possible to control the websocket listen address 2108e2fcbf42SPeter Maydell independently, using the syntax ``websocket``\ =host:port. 2109e2fcbf42SPeter Maydell 2110e2fcbf42SPeter Maydell If no TLS credentials are provided, the websocket connection 2111e2fcbf42SPeter Maydell runs in unencrypted mode. If TLS credentials are provided, the 2112e2fcbf42SPeter Maydell websocket connection requires encrypted client connections. 2113e2fcbf42SPeter Maydell 2114e2fcbf42SPeter Maydell ``password`` 2115e2fcbf42SPeter Maydell Require that password based authentication is used for client 2116e2fcbf42SPeter Maydell connections. 2117e2fcbf42SPeter Maydell 2118e2fcbf42SPeter Maydell The password must be set separately using the ``set_password`` 2119e2fcbf42SPeter Maydell command in the :ref:`pcsys_005fmonitor`. The 2120e2fcbf42SPeter Maydell syntax to change your password is: 2121e2fcbf42SPeter Maydell ``set_password <protocol> <password>`` where <protocol> could be 2122e2fcbf42SPeter Maydell either "vnc" or "spice". 2123e2fcbf42SPeter Maydell 2124e2fcbf42SPeter Maydell If you would like to change <protocol> password expiration, you 2125e2fcbf42SPeter Maydell should use ``expire_password <protocol> <expiration-time>`` 2126e2fcbf42SPeter Maydell where expiration time could be one of the following options: 2127e2fcbf42SPeter Maydell now, never, +seconds or UNIX time of expiration, e.g. +60 to 2128e2fcbf42SPeter Maydell make password expire in 60 seconds, or 1335196800 to make 2129e2fcbf42SPeter Maydell password expire on "Mon Apr 23 12:00:00 EDT 2012" (UNIX time for 2130e2fcbf42SPeter Maydell this date and time). 2131e2fcbf42SPeter Maydell 2132e2fcbf42SPeter Maydell You can also use keywords "now" or "never" for the expiration 2133e2fcbf42SPeter Maydell time to allow <protocol> password to expire immediately or never 2134e2fcbf42SPeter Maydell expire. 2135e2fcbf42SPeter Maydell 2136e2fcbf42SPeter Maydell ``tls-creds=ID`` 2137e2fcbf42SPeter Maydell Provides the ID of a set of TLS credentials to use to secure the 2138e2fcbf42SPeter Maydell VNC server. They will apply to both the normal VNC server socket 2139e2fcbf42SPeter Maydell and the websocket socket (if enabled). Setting TLS credentials 2140e2fcbf42SPeter Maydell will cause the VNC server socket to enable the VeNCrypt auth 2141e2fcbf42SPeter Maydell mechanism. The credentials should have been previously created 2142e2fcbf42SPeter Maydell using the ``-object tls-creds`` argument. 2143e2fcbf42SPeter Maydell 2144e2fcbf42SPeter Maydell ``tls-authz=ID`` 2145e2fcbf42SPeter Maydell Provides the ID of the QAuthZ authorization object against which 2146e2fcbf42SPeter Maydell the client's x509 distinguished name will validated. This object 2147e2fcbf42SPeter Maydell is only resolved at time of use, so can be deleted and recreated 2148e2fcbf42SPeter Maydell on the fly while the VNC server is active. If missing, it will 2149e2fcbf42SPeter Maydell default to denying access. 2150e2fcbf42SPeter Maydell 2151e2fcbf42SPeter Maydell ``sasl`` 2152e2fcbf42SPeter Maydell Require that the client use SASL to authenticate with the VNC 2153e2fcbf42SPeter Maydell server. The exact choice of authentication method used is 2154e2fcbf42SPeter Maydell controlled from the system / user's SASL configuration file for 2155e2fcbf42SPeter Maydell the 'qemu' service. This is typically found in 2156e2fcbf42SPeter Maydell /etc/sasl2/qemu.conf. If running QEMU as an unprivileged user, 2157e2fcbf42SPeter Maydell an environment variable SASL\_CONF\_PATH can be used to make it 2158e2fcbf42SPeter Maydell search alternate locations for the service config. While some 2159e2fcbf42SPeter Maydell SASL auth methods can also provide data encryption (eg GSSAPI), 2160e2fcbf42SPeter Maydell it is recommended that SASL always be combined with the 'tls' 2161e2fcbf42SPeter Maydell and 'x509' settings to enable use of SSL and server 2162e2fcbf42SPeter Maydell certificates. This ensures a data encryption preventing 2163e2fcbf42SPeter Maydell compromise of authentication credentials. See the 2164e2fcbf42SPeter Maydell :ref:`vnc_005fsecurity` section for details on 2165e2fcbf42SPeter Maydell using SASL authentication. 2166e2fcbf42SPeter Maydell 2167e2fcbf42SPeter Maydell ``sasl-authz=ID`` 2168e2fcbf42SPeter Maydell Provides the ID of the QAuthZ authorization object against which 2169e2fcbf42SPeter Maydell the client's SASL username will validated. This object is only 2170e2fcbf42SPeter Maydell resolved at time of use, so can be deleted and recreated on the 2171e2fcbf42SPeter Maydell fly while the VNC server is active. If missing, it will default 2172e2fcbf42SPeter Maydell to denying access. 2173e2fcbf42SPeter Maydell 2174e2fcbf42SPeter Maydell ``acl`` 2175e2fcbf42SPeter Maydell Legacy method for enabling authorization of clients against the 2176e2fcbf42SPeter Maydell x509 distinguished name and SASL username. It results in the 2177e2fcbf42SPeter Maydell creation of two ``authz-list`` objects with IDs of 2178e2fcbf42SPeter Maydell ``vnc.username`` and ``vnc.x509dname``. The rules for these 2179e2fcbf42SPeter Maydell objects must be configured with the HMP ACL commands. 2180e2fcbf42SPeter Maydell 2181e2fcbf42SPeter Maydell This option is deprecated and should no longer be used. The new 2182e2fcbf42SPeter Maydell ``sasl-authz`` and ``tls-authz`` options are a replacement. 2183e2fcbf42SPeter Maydell 2184e2fcbf42SPeter Maydell ``lossy`` 2185e2fcbf42SPeter Maydell Enable lossy compression methods (gradient, JPEG, ...). If this 2186e2fcbf42SPeter Maydell option is set, VNC client may receive lossy framebuffer updates 2187e2fcbf42SPeter Maydell depending on its encoding settings. Enabling this option can 2188e2fcbf42SPeter Maydell save a lot of bandwidth at the expense of quality. 2189e2fcbf42SPeter Maydell 2190e2fcbf42SPeter Maydell ``non-adaptive`` 2191e2fcbf42SPeter Maydell Disable adaptive encodings. Adaptive encodings are enabled by 2192e2fcbf42SPeter Maydell default. An adaptive encoding will try to detect frequently 2193e2fcbf42SPeter Maydell updated screen regions, and send updates in these regions using 2194e2fcbf42SPeter Maydell a lossy encoding (like JPEG). This can be really helpful to save 2195e2fcbf42SPeter Maydell bandwidth when playing videos. Disabling adaptive encodings 2196e2fcbf42SPeter Maydell restores the original static behavior of encodings like Tight. 2197e2fcbf42SPeter Maydell 2198e2fcbf42SPeter Maydell ``share=[allow-exclusive|force-shared|ignore]`` 2199e2fcbf42SPeter Maydell Set display sharing policy. 'allow-exclusive' allows clients to 2200e2fcbf42SPeter Maydell ask for exclusive access. As suggested by the rfb spec this is 2201e2fcbf42SPeter Maydell implemented by dropping other connections. Connecting multiple 2202e2fcbf42SPeter Maydell clients in parallel requires all clients asking for a shared 2203e2fcbf42SPeter Maydell session (vncviewer: -shared switch). This is the default. 2204e2fcbf42SPeter Maydell 'force-shared' disables exclusive client access. Useful for 2205e2fcbf42SPeter Maydell shared desktop sessions, where you don't want someone forgetting 2206e2fcbf42SPeter Maydell specify -shared disconnect everybody else. 'ignore' completely 2207e2fcbf42SPeter Maydell ignores the shared flag and allows everybody connect 2208e2fcbf42SPeter Maydell unconditionally. Doesn't conform to the rfb spec but is 2209e2fcbf42SPeter Maydell traditional QEMU behavior. 2210e2fcbf42SPeter Maydell 2211e2fcbf42SPeter Maydell ``key-delay-ms`` 2212e2fcbf42SPeter Maydell Set keyboard delay, for key down and key up events, in 2213e2fcbf42SPeter Maydell milliseconds. Default is 10. Keyboards are low-bandwidth 2214e2fcbf42SPeter Maydell devices, so this slowdown can help the device and guest to keep 2215e2fcbf42SPeter Maydell up and not lose events in case events are arriving in bulk. 2216e2fcbf42SPeter Maydell Possible causes for the latter are flaky network connections, or 2217e2fcbf42SPeter Maydell scripts for automated testing. 2218e2fcbf42SPeter Maydell 2219e2fcbf42SPeter Maydell ``audiodev=audiodev`` 2220e2fcbf42SPeter Maydell Use the specified audiodev when the VNC client requests audio 2221e2fcbf42SPeter Maydell transmission. When not using an -audiodev argument, this option 2222e2fcbf42SPeter Maydell must be omitted, otherwise is must be present and specify a 2223e2fcbf42SPeter Maydell valid audiodev. 2224e2fcbf42SPeter MaydellERST 22255824d651Sblueswir1 2226a3adb7adSMichael EllermanARCHHEADING(, QEMU_ARCH_I386) 22275824d651Sblueswir1 2228de6b4f90SMarkus ArmbrusterARCHHEADING(i386 target only:, QEMU_ARCH_I386) 22295824d651Sblueswir1 22305824d651Sblueswir1DEF("win2k-hack", 0, QEMU_OPTION_win2k_hack, 2231ad96090aSBlue Swirl "-win2k-hack use it when installing Windows 2000 to avoid a disk full bug\n", 2232ad96090aSBlue Swirl QEMU_ARCH_I386) 2233e2fcbf42SPeter MaydellSRST 2234e2fcbf42SPeter Maydell``-win2k-hack`` 2235e2fcbf42SPeter Maydell Use it when installing Windows 2000 to avoid a disk full bug. After 2236e2fcbf42SPeter Maydell Windows 2000 is installed, you no longer need this option (this 2237e2fcbf42SPeter Maydell option slows down the IDE transfers). 2238e2fcbf42SPeter MaydellERST 22395824d651Sblueswir1 22405824d651Sblueswir1DEF("no-fd-bootchk", 0, QEMU_OPTION_no_fd_bootchk, 2241ad96090aSBlue Swirl "-no-fd-bootchk disable boot signature checking for floppy disks\n", 2242ad96090aSBlue Swirl QEMU_ARCH_I386) 2243e2fcbf42SPeter MaydellSRST 2244e2fcbf42SPeter Maydell``-no-fd-bootchk`` 2245e2fcbf42SPeter Maydell Disable boot signature checking for floppy disks in BIOS. May be 2246e2fcbf42SPeter Maydell needed to boot from old floppy disks. 2247e2fcbf42SPeter MaydellERST 22485824d651Sblueswir1 22495824d651Sblueswir1DEF("no-acpi", 0, QEMU_OPTION_no_acpi, 2250f5d8c8cdSShannon Zhao "-no-acpi disable ACPI\n", QEMU_ARCH_I386 | QEMU_ARCH_ARM) 2251e2fcbf42SPeter MaydellSRST 2252e2fcbf42SPeter Maydell``-no-acpi`` 2253e2fcbf42SPeter Maydell Disable ACPI (Advanced Configuration and Power Interface) support. 2254e2fcbf42SPeter Maydell Use it if your guest OS complains about ACPI problems (PC target 2255e2fcbf42SPeter Maydell machine only). 2256e2fcbf42SPeter MaydellERST 22575824d651Sblueswir1 22585824d651Sblueswir1DEF("no-hpet", 0, QEMU_OPTION_no_hpet, 2259ad96090aSBlue Swirl "-no-hpet disable HPET\n", QEMU_ARCH_I386) 2260e2fcbf42SPeter MaydellSRST 2261e2fcbf42SPeter Maydell``-no-hpet`` 2262e2fcbf42SPeter Maydell Disable HPET support. 2263e2fcbf42SPeter MaydellERST 22645824d651Sblueswir1 22655824d651Sblueswir1DEF("acpitable", HAS_ARG, QEMU_OPTION_acpitable, 2266104bf02eSMichael Tokarev "-acpitable [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n][,asl_compiler_id=str][,asl_compiler_rev=n][,{data|file}=file1[:file2]...]\n" 2267ad96090aSBlue Swirl " ACPI table description\n", QEMU_ARCH_I386) 2268e2fcbf42SPeter MaydellSRST 2269e2fcbf42SPeter Maydell``-acpitable [sig=str][,rev=n][,oem_id=str][,oem_table_id=str][,oem_rev=n] [,asl_compiler_id=str][,asl_compiler_rev=n][,data=file1[:file2]...]`` 2270e2fcbf42SPeter Maydell Add ACPI table with specified header fields and context from 2271e2fcbf42SPeter Maydell specified files. For file=, take whole ACPI table from the specified 2272e2fcbf42SPeter Maydell files, including all ACPI headers (possible overridden by other 2273e2fcbf42SPeter Maydell options). For data=, only data portion of the table is used, all 2274e2fcbf42SPeter Maydell header information is specified in the command line. If a SLIC table 2275e2fcbf42SPeter Maydell is supplied to QEMU, then the SLIC's oem\_id and oem\_table\_id 2276e2fcbf42SPeter Maydell fields will override the same in the RSDT and the FADT (a.k.a. 2277e2fcbf42SPeter Maydell FACP), in order to ensure the field matches required by the 2278e2fcbf42SPeter Maydell Microsoft SLIC spec and the ACPI spec. 2279e2fcbf42SPeter MaydellERST 22805824d651Sblueswir1 2281b6f6e3d3SaliguoriDEF("smbios", HAS_ARG, QEMU_OPTION_smbios, 2282b6f6e3d3Saliguori "-smbios file=binary\n" 2283ca1a8a06SBruce Rogers " load SMBIOS entry from binary file\n" 2284b155eb1dSGabriel L. Somlo "-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d]\n" 2285b155eb1dSGabriel L. Somlo " [,uefi=on|off]\n" 2286ca1a8a06SBruce Rogers " specify SMBIOS type 0 fields\n" 2287b6f6e3d3Saliguori "-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str]\n" 2288b6f6e3d3Saliguori " [,uuid=uuid][,sku=str][,family=str]\n" 2289b155eb1dSGabriel L. Somlo " specify SMBIOS type 1 fields\n" 2290b155eb1dSGabriel L. Somlo "-smbios type=2[,manufacturer=str][,product=str][,version=str][,serial=str]\n" 2291b155eb1dSGabriel L. Somlo " [,asset=str][,location=str]\n" 2292b155eb1dSGabriel L. Somlo " specify SMBIOS type 2 fields\n" 2293b155eb1dSGabriel L. Somlo "-smbios type=3[,manufacturer=str][,version=str][,serial=str][,asset=str]\n" 2294b155eb1dSGabriel L. Somlo " [,sku=str]\n" 2295b155eb1dSGabriel L. Somlo " specify SMBIOS type 3 fields\n" 2296b155eb1dSGabriel L. Somlo "-smbios type=4[,sock_pfx=str][,manufacturer=str][,version=str][,serial=str]\n" 2297c906e039SYing Fang " [,asset=str][,part=str][,max-speed=%d][,current-speed=%d]\n" 2298b155eb1dSGabriel L. Somlo " specify SMBIOS type 4 fields\n" 2299b155eb1dSGabriel L. Somlo "-smbios type=17[,loc_pfx=str][,bank=str][,manufacturer=str][,serial=str]\n" 23003ebd6cc8SGabriel L. Somlo " [,asset=str][,part=str][,speed=%d]\n" 2301b155eb1dSGabriel L. Somlo " specify SMBIOS type 17 fields\n", 2302c30e1565SWei Huang QEMU_ARCH_I386 | QEMU_ARCH_ARM) 2303e2fcbf42SPeter MaydellSRST 2304e2fcbf42SPeter Maydell``-smbios file=binary`` 2305e2fcbf42SPeter Maydell Load SMBIOS entry from binary file. 2306e2fcbf42SPeter Maydell 2307e2fcbf42SPeter Maydell``-smbios type=0[,vendor=str][,version=str][,date=str][,release=%d.%d][,uefi=on|off]`` 2308e2fcbf42SPeter Maydell Specify SMBIOS type 0 fields 2309e2fcbf42SPeter Maydell 2310e2fcbf42SPeter Maydell``-smbios type=1[,manufacturer=str][,product=str][,version=str][,serial=str][,uuid=uuid][,sku=str][,family=str]`` 2311e2fcbf42SPeter Maydell Specify SMBIOS type 1 fields 2312e2fcbf42SPeter Maydell 2313e2fcbf42SPeter Maydell``-smbios type=2[,manufacturer=str][,product=str][,version=str][,serial=str][,asset=str][,location=str]`` 2314e2fcbf42SPeter Maydell Specify SMBIOS type 2 fields 2315e2fcbf42SPeter Maydell 2316e2fcbf42SPeter Maydell``-smbios type=3[,manufacturer=str][,version=str][,serial=str][,asset=str][,sku=str]`` 2317e2fcbf42SPeter Maydell Specify SMBIOS type 3 fields 2318e2fcbf42SPeter Maydell 2319e2fcbf42SPeter Maydell``-smbios type=4[,sock_pfx=str][,manufacturer=str][,version=str][,serial=str][,asset=str][,part=str]`` 2320e2fcbf42SPeter Maydell Specify SMBIOS type 4 fields 2321e2fcbf42SPeter Maydell 2322e2fcbf42SPeter Maydell``-smbios type=17[,loc_pfx=str][,bank=str][,manufacturer=str][,serial=str][,asset=str][,part=str][,speed=%d]`` 2323e2fcbf42SPeter Maydell Specify SMBIOS type 17 fields 2324e2fcbf42SPeter MaydellERST 2325b6f6e3d3Saliguori 2326c70a01e4SMarkus ArmbrusterDEFHEADING() 23275824d651Sblueswir1 2328de6b4f90SMarkus ArmbrusterDEFHEADING(Network options:) 23295824d651Sblueswir1 23306a8b4a5bSThomas HuthDEF("netdev", HAS_ARG, QEMU_OPTION_netdev, 23315824d651Sblueswir1#ifdef CONFIG_SLIRP 23320b11c036SSamuel Thibault "-netdev user,id=str[,ipv4[=on|off]][,net=addr[/mask]][,host=addr]\n" 23330b11c036SSamuel Thibault " [,ipv6[=on|off]][,ipv6-net=addr[/int]][,ipv6-host=addr]\n" 23340b11c036SSamuel Thibault " [,restrict=on|off][,hostname=host][,dhcpstart=addr]\n" 2335f18d1375SBenjamin Drung " [,dns=addr][,ipv6-dns=addr][,dnssearch=domain][,domainname=domain]\n" 23360fca92b9SFam Zheng " [,tftp=dir][,tftp-server-name=name][,bootfile=f][,hostfwd=rule][,guestfwd=rule]" 2337ad196a9dSJan Kiszka#ifndef _WIN32 2338c92ef6a2SJan Kiszka "[,smb=dir[,smbserver=addr]]\n" 2339ad196a9dSJan Kiszka#endif 23406a8b4a5bSThomas Huth " configure a user mode network backend with ID 'str',\n" 23416a8b4a5bSThomas Huth " its DHCP server and optional services\n" 23425824d651Sblueswir1#endif 23435824d651Sblueswir1#ifdef _WIN32 23446a8b4a5bSThomas Huth "-netdev tap,id=str,ifname=name\n" 23456a8b4a5bSThomas Huth " configure a host TAP network backend with ID 'str'\n" 23465824d651Sblueswir1#else 23476a8b4a5bSThomas Huth "-netdev tap,id=str[,fd=h][,fds=x:y:...:z][,ifname=name][,script=file][,downscript=dfile]\n" 2348584613eaSAlexey Kardashevskiy " [,br=bridge][,helper=helper][,sndbuf=nbytes][,vnet_hdr=on|off][,vhost=on|off]\n" 23496a8b4a5bSThomas Huth " [,vhostfd=h][,vhostfds=x:y:...:z][,vhostforce=on|off][,queues=n]\n" 235069e87b32SJason Wang " [,poll-us=n]\n" 23516a8b4a5bSThomas Huth " configure a host TAP network backend with ID 'str'\n" 2352584613eaSAlexey Kardashevskiy " connected to a bridge (default=" DEFAULT_BRIDGE_INTERFACE ")\n" 2353a7c36ee4SCorey Bryant " use network scripts 'file' (default=" DEFAULT_NETWORK_SCRIPT ")\n" 2354a7c36ee4SCorey Bryant " to configure it and 'dfile' (default=" DEFAULT_NETWORK_DOWN_SCRIPT ")\n" 2355a7c36ee4SCorey Bryant " to deconfigure it\n" 2356ca1a8a06SBruce Rogers " use '[down]script=no' to disable script execution\n" 2357a7c36ee4SCorey Bryant " use network helper 'helper' (default=" DEFAULT_BRIDGE_HELPER ") to\n" 2358a7c36ee4SCorey Bryant " configure it\n" 23595824d651Sblueswir1 " use 'fd=h' to connect to an already opened TAP interface\n" 23602ca81baaSJason Wang " use 'fds=x:y:...:z' to connect to already opened multiqueue capable TAP interfaces\n" 2361ca1a8a06SBruce Rogers " use 'sndbuf=nbytes' to limit the size of the send buffer (the\n" 2362f157ed20SMichael S. Tsirkin " default is disabled 'sndbuf=0' to enable flow control set 'sndbuf=1048576')\n" 2363ca1a8a06SBruce Rogers " use vnet_hdr=off to avoid enabling the IFF_VNET_HDR tap flag\n" 2364ca1a8a06SBruce Rogers " use vnet_hdr=on to make the lack of IFF_VNET_HDR support an error condition\n" 236582b0d80eSMichael S. Tsirkin " use vhost=on to enable experimental in kernel accelerator\n" 23665430a28fSmst@redhat.com " (only has effect for virtio guests which use MSIX)\n" 23675430a28fSmst@redhat.com " use vhostforce=on to force vhost on for non-MSIX virtio guests\n" 236882b0d80eSMichael S. Tsirkin " use 'vhostfd=h' to connect to an already opened vhost net device\n" 23692ca81baaSJason Wang " use 'vhostfds=x:y:...:z to connect to multiple already opened vhost net devices\n" 2370ec396014SJason Wang " use 'queues=n' to specify the number of queues to be created for multiqueue TAP\n" 237169e87b32SJason Wang " use 'poll-us=n' to speciy the maximum number of microseconds that could be\n" 237269e87b32SJason Wang " spent on busy polling for vhost net\n" 23736a8b4a5bSThomas Huth "-netdev bridge,id=str[,br=bridge][,helper=helper]\n" 23746a8b4a5bSThomas Huth " configure a host TAP network backend with ID 'str' that is\n" 23756a8b4a5bSThomas Huth " connected to a bridge (default=" DEFAULT_BRIDGE_INTERFACE ")\n" 23766a8b4a5bSThomas Huth " using the program 'helper (default=" DEFAULT_BRIDGE_HELPER ")\n" 23770df0ff6dSMark McLoughlin#endif 23783fb69aa1SAnton Ivanov#ifdef __linux__ 23796a8b4a5bSThomas Huth "-netdev l2tpv3,id=str,src=srcaddr,dst=dstaddr[,srcport=srcport][,dstport=dstport]\n" 23806a8b4a5bSThomas Huth " [,rxsession=rxsession],txsession=txsession[,ipv6=on/off][,udp=on/off]\n" 23816a8b4a5bSThomas Huth " [,cookie64=on/off][,counter][,pincounter][,txcookie=txcookie]\n" 23826a8b4a5bSThomas Huth " [,rxcookie=rxcookie][,offset=offset]\n" 23836a8b4a5bSThomas Huth " configure a network backend with ID 'str' connected to\n" 23846a8b4a5bSThomas Huth " an Ethernet over L2TPv3 pseudowire.\n" 23853fb69aa1SAnton Ivanov " Linux kernel 3.3+ as well as most routers can talk\n" 23862f47b403SMichael Tokarev " L2TPv3. This transport allows connecting a VM to a VM,\n" 23873fb69aa1SAnton Ivanov " VM to a router and even VM to Host. It is a nearly-universal\n" 238821843dc4SStefan Hajnoczi " standard (RFC3931). Note - this implementation uses static\n" 23893fb69aa1SAnton Ivanov " pre-configured tunnels (same as the Linux kernel).\n" 23903fb69aa1SAnton Ivanov " use 'src=' to specify source address\n" 23913fb69aa1SAnton Ivanov " use 'dst=' to specify destination address\n" 23923fb69aa1SAnton Ivanov " use 'udp=on' to specify udp encapsulation\n" 23933952651aSGonglei " use 'srcport=' to specify source udp port\n" 23943fb69aa1SAnton Ivanov " use 'dstport=' to specify destination udp port\n" 23953fb69aa1SAnton Ivanov " use 'ipv6=on' to force v6\n" 23963fb69aa1SAnton Ivanov " L2TPv3 uses cookies to prevent misconfiguration as\n" 23973fb69aa1SAnton Ivanov " well as a weak security measure\n" 23983fb69aa1SAnton Ivanov " use 'rxcookie=0x012345678' to specify a rxcookie\n" 23993fb69aa1SAnton Ivanov " use 'txcookie=0x012345678' to specify a txcookie\n" 24003fb69aa1SAnton Ivanov " use 'cookie64=on' to set cookie size to 64 bit, otherwise 32\n" 24013fb69aa1SAnton Ivanov " use 'counter=off' to force a 'cut-down' L2TPv3 with no counter\n" 24023fb69aa1SAnton Ivanov " use 'pincounter=on' to work around broken counter handling in peer\n" 24033fb69aa1SAnton Ivanov " use 'offset=X' to add an extra offset between header and data\n" 24043fb69aa1SAnton Ivanov#endif 24056a8b4a5bSThomas Huth "-netdev socket,id=str[,fd=h][,listen=[host]:port][,connect=host:port]\n" 24066a8b4a5bSThomas Huth " configure a network backend to connect to another network\n" 24076a8b4a5bSThomas Huth " using a socket connection\n" 24086a8b4a5bSThomas Huth "-netdev socket,id=str[,fd=h][,mcast=maddr:port[,localaddr=addr]]\n" 24096a8b4a5bSThomas Huth " configure a network backend to connect to a multicast maddr and port\n" 24103a75e74cSMike Ryan " use 'localaddr=addr' to specify the host address to send packets from\n" 24116a8b4a5bSThomas Huth "-netdev socket,id=str[,fd=h][,udp=host:port][,localaddr=host:port]\n" 24126a8b4a5bSThomas Huth " configure a network backend to connect to another network\n" 24136a8b4a5bSThomas Huth " using an UDP tunnel\n" 24145824d651Sblueswir1#ifdef CONFIG_VDE 24156a8b4a5bSThomas Huth "-netdev vde,id=str[,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]\n" 24166a8b4a5bSThomas Huth " configure a network backend to connect to port 'n' of a vde switch\n" 24176a8b4a5bSThomas Huth " running on host and listening for incoming connections on 'socketpath'.\n" 24185824d651Sblueswir1 " Use group 'groupname' and mode 'octalmode' to change default\n" 24195824d651Sblueswir1 " ownership and permissions for communication port.\n" 24205824d651Sblueswir1#endif 242158952137SVincenzo Maffione#ifdef CONFIG_NETMAP 24226a8b4a5bSThomas Huth "-netdev netmap,id=str,ifname=name[,devname=nmname]\n" 242358952137SVincenzo Maffione " attach to the existing netmap-enabled network interface 'name', or to a\n" 242458952137SVincenzo Maffione " VALE port (created on the fly) called 'name' ('nmname' is name of the \n" 242558952137SVincenzo Maffione " netmap device, defaults to '/dev/netmap')\n" 242658952137SVincenzo Maffione#endif 2427253dc14cSThomas Huth#ifdef CONFIG_POSIX 24286a8b4a5bSThomas Huth "-netdev vhost-user,id=str,chardev=dev[,vhostforce=on|off]\n" 24296a8b4a5bSThomas Huth " configure a vhost-user network, backed by a chardev 'dev'\n" 2430253dc14cSThomas Huth#endif 2431108a6481SCindy Lu#ifdef __linux__ 2432108a6481SCindy Lu "-netdev vhost-vdpa,id=str,vhostdev=/path/to/dev\n" 2433108a6481SCindy Lu " configure a vhost-vdpa network,Establish a vhost-vdpa netdev\n" 2434108a6481SCindy Lu#endif 243518d65d22SThomas Huth "-netdev hubport,id=str,hubid=n[,netdev=nd]\n" 2436af1a5c3eSThomas Huth " configure a hub port on the hub with ID 'n'\n", QEMU_ARCH_ALL) 243778cd6f7bSThomas HuthDEF("nic", HAS_ARG, QEMU_OPTION_nic, 2438dfaa7d50SBALATON Zoltan "-nic [tap|bridge|" 243978cd6f7bSThomas Huth#ifdef CONFIG_SLIRP 244078cd6f7bSThomas Huth "user|" 244178cd6f7bSThomas Huth#endif 244278cd6f7bSThomas Huth#ifdef __linux__ 244378cd6f7bSThomas Huth "l2tpv3|" 244478cd6f7bSThomas Huth#endif 244578cd6f7bSThomas Huth#ifdef CONFIG_VDE 244678cd6f7bSThomas Huth "vde|" 244778cd6f7bSThomas Huth#endif 244878cd6f7bSThomas Huth#ifdef CONFIG_NETMAP 244978cd6f7bSThomas Huth "netmap|" 245078cd6f7bSThomas Huth#endif 245178cd6f7bSThomas Huth#ifdef CONFIG_POSIX 245278cd6f7bSThomas Huth "vhost-user|" 245378cd6f7bSThomas Huth#endif 245478cd6f7bSThomas Huth "socket][,option][,...][mac=macaddr]\n" 245578cd6f7bSThomas Huth " initialize an on-board / default host NIC (using MAC address\n" 245678cd6f7bSThomas Huth " macaddr) and connect it to the given host network backend\n" 2457dfaa7d50SBALATON Zoltan "-nic none use it alone to have zero network devices (the default is to\n" 245878cd6f7bSThomas Huth " provided a 'user' network connection)\n", 245978cd6f7bSThomas Huth QEMU_ARCH_ALL) 24606a8b4a5bSThomas HuthDEF("net", HAS_ARG, QEMU_OPTION_net, 2461af1a5c3eSThomas Huth "-net nic[,macaddr=mac][,model=type][,name=str][,addr=str][,vectors=v]\n" 24620e60a82dSThomas Huth " configure or create an on-board (or machine default) NIC and\n" 2463af1a5c3eSThomas Huth " connect it to hub 0 (please use -nic unless you need a hub)\n" 24646a8b4a5bSThomas Huth "-net [" 2465a1ea458fSMark McLoughlin#ifdef CONFIG_SLIRP 2466a1ea458fSMark McLoughlin "user|" 2467a1ea458fSMark McLoughlin#endif 2468a1ea458fSMark McLoughlin "tap|" 2469a7c36ee4SCorey Bryant "bridge|" 2470a1ea458fSMark McLoughlin#ifdef CONFIG_VDE 2471a1ea458fSMark McLoughlin "vde|" 2472a1ea458fSMark McLoughlin#endif 247358952137SVincenzo Maffione#ifdef CONFIG_NETMAP 247458952137SVincenzo Maffione "netmap|" 247558952137SVincenzo Maffione#endif 2476af1a5c3eSThomas Huth "socket][,option][,option][,...]\n" 24776a8b4a5bSThomas Huth " old way to initialize a host network interface\n" 24786a8b4a5bSThomas Huth " (use the -netdev option if possible instead)\n", QEMU_ARCH_ALL) 2479e2fcbf42SPeter MaydellSRST 2480e2fcbf42SPeter Maydell``-nic [tap|bridge|user|l2tpv3|vde|netmap|vhost-user|socket][,...][,mac=macaddr][,model=mn]`` 2481e2fcbf42SPeter Maydell This option is a shortcut for configuring both the on-board 2482e2fcbf42SPeter Maydell (default) guest NIC hardware and the host network backend in one go. 2483e2fcbf42SPeter Maydell The host backend options are the same as with the corresponding 2484e2fcbf42SPeter Maydell ``-netdev`` options below. The guest NIC model can be set with 2485e2fcbf42SPeter Maydell ``model=modelname``. Use ``model=help`` to list the available device 2486e2fcbf42SPeter Maydell types. The hardware MAC address can be set with ``mac=macaddr``. 2487e2fcbf42SPeter Maydell 2488e2fcbf42SPeter Maydell The following two example do exactly the same, to show how ``-nic`` 2489e2fcbf42SPeter Maydell can be used to shorten the command line length: 2490e2fcbf42SPeter Maydell 2491e2fcbf42SPeter Maydell .. parsed-literal:: 2492e2fcbf42SPeter Maydell 2493e2fcbf42SPeter Maydell |qemu_system| -netdev user,id=n1,ipv6=off -device e1000,netdev=n1,mac=52:54:98:76:54:32 2494e2fcbf42SPeter Maydell |qemu_system| -nic user,ipv6=off,model=e1000,mac=52:54:98:76:54:32 2495e2fcbf42SPeter Maydell 2496e2fcbf42SPeter Maydell``-nic none`` 2497e2fcbf42SPeter Maydell Indicate that no network devices should be configured. It is used to 2498e2fcbf42SPeter Maydell override the default configuration (default NIC with "user" host 2499e2fcbf42SPeter Maydell network backend) which is activated if no other networking options 2500e2fcbf42SPeter Maydell are provided. 2501e2fcbf42SPeter Maydell 2502e2fcbf42SPeter Maydell``-netdev user,id=id[,option][,option][,...]`` 2503e2fcbf42SPeter Maydell Configure user mode host network backend which requires no 2504e2fcbf42SPeter Maydell administrator privilege to run. Valid options are: 2505e2fcbf42SPeter Maydell 2506e2fcbf42SPeter Maydell ``id=id`` 2507e2fcbf42SPeter Maydell Assign symbolic name for use in monitor commands. 2508e2fcbf42SPeter Maydell 2509e2fcbf42SPeter Maydell ``ipv4=on|off and ipv6=on|off`` 2510e2fcbf42SPeter Maydell Specify that either IPv4 or IPv6 must be enabled. If neither is 2511e2fcbf42SPeter Maydell specified both protocols are enabled. 2512e2fcbf42SPeter Maydell 2513e2fcbf42SPeter Maydell ``net=addr[/mask]`` 2514e2fcbf42SPeter Maydell Set IP network address the guest will see. Optionally specify 2515e2fcbf42SPeter Maydell the netmask, either in the form a.b.c.d or as number of valid 2516e2fcbf42SPeter Maydell top-most bits. Default is 10.0.2.0/24. 2517e2fcbf42SPeter Maydell 2518e2fcbf42SPeter Maydell ``host=addr`` 2519e2fcbf42SPeter Maydell Specify the guest-visible address of the host. Default is the 2520e2fcbf42SPeter Maydell 2nd IP in the guest network, i.e. x.x.x.2. 2521e2fcbf42SPeter Maydell 2522e2fcbf42SPeter Maydell ``ipv6-net=addr[/int]`` 2523e2fcbf42SPeter Maydell Set IPv6 network address the guest will see (default is 2524e2fcbf42SPeter Maydell fec0::/64). The network prefix is given in the usual hexadecimal 2525e2fcbf42SPeter Maydell IPv6 address notation. The prefix size is optional, and is given 2526e2fcbf42SPeter Maydell as the number of valid top-most bits (default is 64). 2527e2fcbf42SPeter Maydell 2528e2fcbf42SPeter Maydell ``ipv6-host=addr`` 2529e2fcbf42SPeter Maydell Specify the guest-visible IPv6 address of the host. Default is 2530e2fcbf42SPeter Maydell the 2nd IPv6 in the guest network, i.e. xxxx::2. 2531e2fcbf42SPeter Maydell 2532e2fcbf42SPeter Maydell ``restrict=on|off`` 2533e2fcbf42SPeter Maydell If this option is enabled, the guest will be isolated, i.e. it 2534e2fcbf42SPeter Maydell will not be able to contact the host and no guest IP packets 2535e2fcbf42SPeter Maydell will be routed over the host to the outside. This option does 2536e2fcbf42SPeter Maydell not affect any explicitly set forwarding rules. 2537e2fcbf42SPeter Maydell 2538e2fcbf42SPeter Maydell ``hostname=name`` 2539e2fcbf42SPeter Maydell Specifies the client hostname reported by the built-in DHCP 2540e2fcbf42SPeter Maydell server. 2541e2fcbf42SPeter Maydell 2542e2fcbf42SPeter Maydell ``dhcpstart=addr`` 2543e2fcbf42SPeter Maydell Specify the first of the 16 IPs the built-in DHCP server can 2544e2fcbf42SPeter Maydell assign. Default is the 15th to 31st IP in the guest network, 2545e2fcbf42SPeter Maydell i.e. x.x.x.15 to x.x.x.31. 2546e2fcbf42SPeter Maydell 2547e2fcbf42SPeter Maydell ``dns=addr`` 2548e2fcbf42SPeter Maydell Specify the guest-visible address of the virtual nameserver. The 2549e2fcbf42SPeter Maydell address must be different from the host address. Default is the 2550e2fcbf42SPeter Maydell 3rd IP in the guest network, i.e. x.x.x.3. 2551e2fcbf42SPeter Maydell 2552e2fcbf42SPeter Maydell ``ipv6-dns=addr`` 2553e2fcbf42SPeter Maydell Specify the guest-visible address of the IPv6 virtual 2554e2fcbf42SPeter Maydell nameserver. The address must be different from the host address. 2555e2fcbf42SPeter Maydell Default is the 3rd IP in the guest network, i.e. xxxx::3. 2556e2fcbf42SPeter Maydell 2557e2fcbf42SPeter Maydell ``dnssearch=domain`` 2558e2fcbf42SPeter Maydell Provides an entry for the domain-search list sent by the 2559e2fcbf42SPeter Maydell built-in DHCP server. More than one domain suffix can be 2560e2fcbf42SPeter Maydell transmitted by specifying this option multiple times. If 2561e2fcbf42SPeter Maydell supported, this will cause the guest to automatically try to 2562e2fcbf42SPeter Maydell append the given domain suffix(es) in case a domain name can not 2563e2fcbf42SPeter Maydell be resolved. 2564e2fcbf42SPeter Maydell 2565e2fcbf42SPeter Maydell Example: 2566e2fcbf42SPeter Maydell 2567e2fcbf42SPeter Maydell .. parsed-literal:: 2568e2fcbf42SPeter Maydell 2569e2fcbf42SPeter Maydell |qemu_system| -nic user,dnssearch=mgmt.example.org,dnssearch=example.org 2570e2fcbf42SPeter Maydell 2571e2fcbf42SPeter Maydell ``domainname=domain`` 2572e2fcbf42SPeter Maydell Specifies the client domain name reported by the built-in DHCP 2573e2fcbf42SPeter Maydell server. 2574e2fcbf42SPeter Maydell 2575e2fcbf42SPeter Maydell ``tftp=dir`` 2576e2fcbf42SPeter Maydell When using the user mode network stack, activate a built-in TFTP 2577e2fcbf42SPeter Maydell server. The files in dir will be exposed as the root of a TFTP 2578e2fcbf42SPeter Maydell server. The TFTP client on the guest must be configured in 2579e2fcbf42SPeter Maydell binary mode (use the command ``bin`` of the Unix TFTP client). 2580e2fcbf42SPeter Maydell 2581e2fcbf42SPeter Maydell ``tftp-server-name=name`` 2582e2fcbf42SPeter Maydell In BOOTP reply, broadcast name as the "TFTP server name" 2583e2fcbf42SPeter Maydell (RFC2132 option 66). This can be used to advise the guest to 2584e2fcbf42SPeter Maydell load boot files or configurations from a different server than 2585e2fcbf42SPeter Maydell the host address. 2586e2fcbf42SPeter Maydell 2587e2fcbf42SPeter Maydell ``bootfile=file`` 2588e2fcbf42SPeter Maydell When using the user mode network stack, broadcast file as the 2589e2fcbf42SPeter Maydell BOOTP filename. In conjunction with ``tftp``, this can be used 2590e2fcbf42SPeter Maydell to network boot a guest from a local directory. 2591e2fcbf42SPeter Maydell 2592e2fcbf42SPeter Maydell Example (using pxelinux): 2593e2fcbf42SPeter Maydell 2594e2fcbf42SPeter Maydell .. parsed-literal:: 2595e2fcbf42SPeter Maydell 2596e2fcbf42SPeter Maydell |qemu_system| -hda linux.img -boot n -device e1000,netdev=n1 \ 2597e2fcbf42SPeter Maydell -netdev user,id=n1,tftp=/path/to/tftp/files,bootfile=/pxelinux.0 2598e2fcbf42SPeter Maydell 2599e2fcbf42SPeter Maydell ``smb=dir[,smbserver=addr]`` 2600e2fcbf42SPeter Maydell When using the user mode network stack, activate a built-in SMB 2601e2fcbf42SPeter Maydell server so that Windows OSes can access to the host files in 2602e2fcbf42SPeter Maydell ``dir`` transparently. The IP address of the SMB server can be 2603e2fcbf42SPeter Maydell set to addr. By default the 4th IP in the guest network is used, 2604e2fcbf42SPeter Maydell i.e. x.x.x.4. 2605e2fcbf42SPeter Maydell 2606e2fcbf42SPeter Maydell In the guest Windows OS, the line: 2607e2fcbf42SPeter Maydell 2608e2fcbf42SPeter Maydell :: 2609e2fcbf42SPeter Maydell 2610e2fcbf42SPeter Maydell 10.0.2.4 smbserver 2611e2fcbf42SPeter Maydell 2612e2fcbf42SPeter Maydell must be added in the file ``C:\WINDOWS\LMHOSTS`` (for windows 2613e2fcbf42SPeter Maydell 9x/Me) or ``C:\WINNT\SYSTEM32\DRIVERS\ETC\LMHOSTS`` (Windows 2614e2fcbf42SPeter Maydell NT/2000). 2615e2fcbf42SPeter Maydell 2616e2fcbf42SPeter Maydell Then ``dir`` can be accessed in ``\\smbserver\qemu``. 2617e2fcbf42SPeter Maydell 2618e2fcbf42SPeter Maydell Note that a SAMBA server must be installed on the host OS. 2619e2fcbf42SPeter Maydell 2620e2fcbf42SPeter Maydell ``hostfwd=[tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport`` 2621e2fcbf42SPeter Maydell Redirect incoming TCP or UDP connections to the host port 2622e2fcbf42SPeter Maydell hostport to the guest IP address guestaddr on guest port 2623e2fcbf42SPeter Maydell guestport. If guestaddr is not specified, its value is x.x.x.15 2624e2fcbf42SPeter Maydell (default first address given by the built-in DHCP server). By 2625e2fcbf42SPeter Maydell specifying hostaddr, the rule can be bound to a specific host 2626e2fcbf42SPeter Maydell interface. If no connection type is set, TCP is used. This 2627e2fcbf42SPeter Maydell option can be given multiple times. 2628e2fcbf42SPeter Maydell 2629e2fcbf42SPeter Maydell For example, to redirect host X11 connection from screen 1 to 2630e2fcbf42SPeter Maydell guest screen 0, use the following: 2631e2fcbf42SPeter Maydell 263209ce5f2dSPeter Maydell .. parsed-literal:: 2633e2fcbf42SPeter Maydell 2634e2fcbf42SPeter Maydell # on the host 2635e2fcbf42SPeter Maydell |qemu_system| -nic user,hostfwd=tcp:127.0.0.1:6001-:6000 2636e2fcbf42SPeter Maydell # this host xterm should open in the guest X11 server 2637e2fcbf42SPeter Maydell xterm -display :1 2638e2fcbf42SPeter Maydell 2639e2fcbf42SPeter Maydell To redirect telnet connections from host port 5555 to telnet 2640e2fcbf42SPeter Maydell port on the guest, use the following: 2641e2fcbf42SPeter Maydell 264209ce5f2dSPeter Maydell .. parsed-literal:: 2643e2fcbf42SPeter Maydell 2644e2fcbf42SPeter Maydell # on the host 2645e2fcbf42SPeter Maydell |qemu_system| -nic user,hostfwd=tcp::5555-:23 2646e2fcbf42SPeter Maydell telnet localhost 5555 2647e2fcbf42SPeter Maydell 2648e2fcbf42SPeter Maydell Then when you use on the host ``telnet localhost 5555``, you 2649e2fcbf42SPeter Maydell connect to the guest telnet server. 2650e2fcbf42SPeter Maydell 2651e2fcbf42SPeter Maydell ``guestfwd=[tcp]:server:port-dev``; \ ``guestfwd=[tcp]:server:port-cmd:command`` 2652e2fcbf42SPeter Maydell Forward guest TCP connections to the IP address server on port 2653e2fcbf42SPeter Maydell port to the character device dev or to a program executed by 2654e2fcbf42SPeter Maydell cmd:command which gets spawned for each connection. This option 2655e2fcbf42SPeter Maydell can be given multiple times. 2656e2fcbf42SPeter Maydell 2657e2fcbf42SPeter Maydell You can either use a chardev directly and have that one used 2658e2fcbf42SPeter Maydell throughout QEMU's lifetime, like in the following example: 2659e2fcbf42SPeter Maydell 266009ce5f2dSPeter Maydell .. parsed-literal:: 2661e2fcbf42SPeter Maydell 2662e2fcbf42SPeter Maydell # open 10.10.1.1:4321 on bootup, connect 10.0.2.100:1234 to it whenever 2663e2fcbf42SPeter Maydell # the guest accesses it 2664e2fcbf42SPeter Maydell |qemu_system| -nic user,guestfwd=tcp:10.0.2.100:1234-tcp:10.10.1.1:4321 2665e2fcbf42SPeter Maydell 2666e2fcbf42SPeter Maydell Or you can execute a command on every TCP connection established 2667e2fcbf42SPeter Maydell by the guest, so that QEMU behaves similar to an inetd process 2668e2fcbf42SPeter Maydell for that virtual server: 2669e2fcbf42SPeter Maydell 267009ce5f2dSPeter Maydell .. parsed-literal:: 2671e2fcbf42SPeter Maydell 2672e2fcbf42SPeter Maydell # call "netcat 10.10.1.1 4321" on every TCP connection to 10.0.2.100:1234 2673e2fcbf42SPeter Maydell # and connect the TCP stream to its stdin/stdout 2674e2fcbf42SPeter Maydell |qemu_system| -nic 'user,id=n1,guestfwd=tcp:10.0.2.100:1234-cmd:netcat 10.10.1.1 4321' 2675e2fcbf42SPeter Maydell 2676e2fcbf42SPeter Maydell``-netdev tap,id=id[,fd=h][,ifname=name][,script=file][,downscript=dfile][,br=bridge][,helper=helper]`` 2677e2fcbf42SPeter Maydell Configure a host TAP network backend with ID id. 2678e2fcbf42SPeter Maydell 2679e2fcbf42SPeter Maydell Use the network script file to configure it and the network script 2680e2fcbf42SPeter Maydell dfile to deconfigure it. If name is not provided, the OS 2681e2fcbf42SPeter Maydell automatically provides one. The default network configure script is 2682e2fcbf42SPeter Maydell ``/etc/qemu-ifup`` and the default network deconfigure script is 2683e2fcbf42SPeter Maydell ``/etc/qemu-ifdown``. Use ``script=no`` or ``downscript=no`` to 2684e2fcbf42SPeter Maydell disable script execution. 2685e2fcbf42SPeter Maydell 2686e2fcbf42SPeter Maydell If running QEMU as an unprivileged user, use the network helper 2687*8d73ec89STianjia Zhang to configure the TAP interface and attach it to the bridge. 2688e2fcbf42SPeter Maydell The default network helper executable is 2689e2fcbf42SPeter Maydell ``/path/to/qemu-bridge-helper`` and the default bridge device is 2690e2fcbf42SPeter Maydell ``br0``. 2691e2fcbf42SPeter Maydell 2692e2fcbf42SPeter Maydell ``fd``\ =h can be used to specify the handle of an already opened 2693e2fcbf42SPeter Maydell host TAP interface. 2694e2fcbf42SPeter Maydell 2695e2fcbf42SPeter Maydell Examples: 2696e2fcbf42SPeter Maydell 269709ce5f2dSPeter Maydell .. parsed-literal:: 2698e2fcbf42SPeter Maydell 2699e2fcbf42SPeter Maydell #launch a QEMU instance with the default network script 2700e2fcbf42SPeter Maydell |qemu_system| linux.img -nic tap 2701e2fcbf42SPeter Maydell 270209ce5f2dSPeter Maydell .. parsed-literal:: 2703e2fcbf42SPeter Maydell 2704e2fcbf42SPeter Maydell #launch a QEMU instance with two NICs, each one connected 2705e2fcbf42SPeter Maydell #to a TAP device 2706e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2707e2fcbf42SPeter Maydell -netdev tap,id=nd0,ifname=tap0 -device e1000,netdev=nd0 \ 2708e2fcbf42SPeter Maydell -netdev tap,id=nd1,ifname=tap1 -device rtl8139,netdev=nd1 2709e2fcbf42SPeter Maydell 271009ce5f2dSPeter Maydell .. parsed-literal:: 2711e2fcbf42SPeter Maydell 2712e2fcbf42SPeter Maydell #launch a QEMU instance with the default network helper to 2713e2fcbf42SPeter Maydell #connect a TAP device to bridge br0 2714e2fcbf42SPeter Maydell |qemu_system| linux.img -device virtio-net-pci,netdev=n1 \ 2715e2fcbf42SPeter Maydell -netdev tap,id=n1,"helper=/path/to/qemu-bridge-helper" 2716e2fcbf42SPeter Maydell 2717e2fcbf42SPeter Maydell``-netdev bridge,id=id[,br=bridge][,helper=helper]`` 2718e2fcbf42SPeter Maydell Connect a host TAP network interface to a host bridge device. 2719e2fcbf42SPeter Maydell 2720e2fcbf42SPeter Maydell Use the network helper helper to configure the TAP interface and 2721e2fcbf42SPeter Maydell attach it to the bridge. The default network helper executable is 2722e2fcbf42SPeter Maydell ``/path/to/qemu-bridge-helper`` and the default bridge device is 2723e2fcbf42SPeter Maydell ``br0``. 2724e2fcbf42SPeter Maydell 2725e2fcbf42SPeter Maydell Examples: 2726e2fcbf42SPeter Maydell 272709ce5f2dSPeter Maydell .. parsed-literal:: 2728e2fcbf42SPeter Maydell 2729e2fcbf42SPeter Maydell #launch a QEMU instance with the default network helper to 2730e2fcbf42SPeter Maydell #connect a TAP device to bridge br0 2731e2fcbf42SPeter Maydell |qemu_system| linux.img -netdev bridge,id=n1 -device virtio-net,netdev=n1 2732e2fcbf42SPeter Maydell 273309ce5f2dSPeter Maydell .. parsed-literal:: 2734e2fcbf42SPeter Maydell 2735e2fcbf42SPeter Maydell #launch a QEMU instance with the default network helper to 2736e2fcbf42SPeter Maydell #connect a TAP device to bridge qemubr0 2737e2fcbf42SPeter Maydell |qemu_system| linux.img -netdev bridge,br=qemubr0,id=n1 -device virtio-net,netdev=n1 2738e2fcbf42SPeter Maydell 2739e2fcbf42SPeter Maydell``-netdev socket,id=id[,fd=h][,listen=[host]:port][,connect=host:port]`` 2740e2fcbf42SPeter Maydell This host network backend can be used to connect the guest's network 2741e2fcbf42SPeter Maydell to another QEMU virtual machine using a TCP socket connection. If 2742e2fcbf42SPeter Maydell ``listen`` is specified, QEMU waits for incoming connections on port 2743e2fcbf42SPeter Maydell (host is optional). ``connect`` is used to connect to another QEMU 2744e2fcbf42SPeter Maydell instance using the ``listen`` option. ``fd``\ =h specifies an 2745e2fcbf42SPeter Maydell already opened TCP socket. 2746e2fcbf42SPeter Maydell 2747e2fcbf42SPeter Maydell Example: 2748e2fcbf42SPeter Maydell 274909ce5f2dSPeter Maydell .. parsed-literal:: 2750e2fcbf42SPeter Maydell 2751e2fcbf42SPeter Maydell # launch a first QEMU instance 2752e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2753e2fcbf42SPeter Maydell -device e1000,netdev=n1,mac=52:54:00:12:34:56 \ 2754e2fcbf42SPeter Maydell -netdev socket,id=n1,listen=:1234 2755e2fcbf42SPeter Maydell # connect the network of this instance to the network of the first instance 2756e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2757e2fcbf42SPeter Maydell -device e1000,netdev=n2,mac=52:54:00:12:34:57 \ 2758e2fcbf42SPeter Maydell -netdev socket,id=n2,connect=127.0.0.1:1234 2759e2fcbf42SPeter Maydell 2760e2fcbf42SPeter Maydell``-netdev socket,id=id[,fd=h][,mcast=maddr:port[,localaddr=addr]]`` 2761e2fcbf42SPeter Maydell Configure a socket host network backend to share the guest's network 2762e2fcbf42SPeter Maydell traffic with another QEMU virtual machines using a UDP multicast 2763e2fcbf42SPeter Maydell socket, effectively making a bus for every QEMU with same multicast 2764e2fcbf42SPeter Maydell address maddr and port. NOTES: 2765e2fcbf42SPeter Maydell 2766e2fcbf42SPeter Maydell 1. Several QEMU can be running on different hosts and share same bus 2767e2fcbf42SPeter Maydell (assuming correct multicast setup for these hosts). 2768e2fcbf42SPeter Maydell 2769e2fcbf42SPeter Maydell 2. mcast support is compatible with User Mode Linux (argument 2770e2fcbf42SPeter Maydell ``ethN=mcast``), see http://user-mode-linux.sf.net. 2771e2fcbf42SPeter Maydell 2772e2fcbf42SPeter Maydell 3. Use ``fd=h`` to specify an already opened UDP multicast socket. 2773e2fcbf42SPeter Maydell 2774e2fcbf42SPeter Maydell Example: 2775e2fcbf42SPeter Maydell 277609ce5f2dSPeter Maydell .. parsed-literal:: 2777e2fcbf42SPeter Maydell 2778e2fcbf42SPeter Maydell # launch one QEMU instance 2779e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2780e2fcbf42SPeter Maydell -device e1000,netdev=n1,mac=52:54:00:12:34:56 \ 2781e2fcbf42SPeter Maydell -netdev socket,id=n1,mcast=230.0.0.1:1234 2782e2fcbf42SPeter Maydell # launch another QEMU instance on same "bus" 2783e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2784e2fcbf42SPeter Maydell -device e1000,netdev=n2,mac=52:54:00:12:34:57 \ 2785e2fcbf42SPeter Maydell -netdev socket,id=n2,mcast=230.0.0.1:1234 2786e2fcbf42SPeter Maydell # launch yet another QEMU instance on same "bus" 2787e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2788e2fcbf42SPeter Maydell -device e1000,netdev=n3,mac=52:54:00:12:34:58 \ 2789e2fcbf42SPeter Maydell -netdev socket,id=n3,mcast=230.0.0.1:1234 2790e2fcbf42SPeter Maydell 2791e2fcbf42SPeter Maydell Example (User Mode Linux compat.): 2792e2fcbf42SPeter Maydell 279309ce5f2dSPeter Maydell .. parsed-literal:: 2794e2fcbf42SPeter Maydell 2795e2fcbf42SPeter Maydell # launch QEMU instance (note mcast address selected is UML's default) 2796e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2797e2fcbf42SPeter Maydell -device e1000,netdev=n1,mac=52:54:00:12:34:56 \ 2798e2fcbf42SPeter Maydell -netdev socket,id=n1,mcast=239.192.168.1:1102 2799e2fcbf42SPeter Maydell # launch UML 2800e2fcbf42SPeter Maydell /path/to/linux ubd0=/path/to/root_fs eth0=mcast 2801e2fcbf42SPeter Maydell 2802e2fcbf42SPeter Maydell Example (send packets from host's 1.2.3.4): 2803e2fcbf42SPeter Maydell 2804e2fcbf42SPeter Maydell .. parsed-literal:: 2805e2fcbf42SPeter Maydell 2806e2fcbf42SPeter Maydell |qemu_system| linux.img \ 2807e2fcbf42SPeter Maydell -device e1000,netdev=n1,mac=52:54:00:12:34:56 \ 2808e2fcbf42SPeter Maydell -netdev socket,id=n1,mcast=239.192.168.1:1102,localaddr=1.2.3.4 2809e2fcbf42SPeter Maydell 2810e2fcbf42SPeter Maydell``-netdev l2tpv3,id=id,src=srcaddr,dst=dstaddr[,srcport=srcport][,dstport=dstport],txsession=txsession[,rxsession=rxsession][,ipv6][,udp][,cookie64][,counter][,pincounter][,txcookie=txcookie][,rxcookie=rxcookie][,offset=offset]`` 2811e2fcbf42SPeter Maydell Configure a L2TPv3 pseudowire host network backend. L2TPv3 (RFC3931) 2812e2fcbf42SPeter Maydell is a popular protocol to transport Ethernet (and other Layer 2) data 2813e2fcbf42SPeter Maydell frames between two systems. It is present in routers, firewalls and 2814e2fcbf42SPeter Maydell the Linux kernel (from version 3.3 onwards). 2815e2fcbf42SPeter Maydell 2816e2fcbf42SPeter Maydell This transport allows a VM to communicate to another VM, router or 2817e2fcbf42SPeter Maydell firewall directly. 2818e2fcbf42SPeter Maydell 2819e2fcbf42SPeter Maydell ``src=srcaddr`` 2820e2fcbf42SPeter Maydell source address (mandatory) 2821e2fcbf42SPeter Maydell 2822e2fcbf42SPeter Maydell ``dst=dstaddr`` 2823e2fcbf42SPeter Maydell destination address (mandatory) 2824e2fcbf42SPeter Maydell 2825e2fcbf42SPeter Maydell ``udp`` 2826e2fcbf42SPeter Maydell select udp encapsulation (default is ip). 2827e2fcbf42SPeter Maydell 2828e2fcbf42SPeter Maydell ``srcport=srcport`` 2829e2fcbf42SPeter Maydell source udp port. 2830e2fcbf42SPeter Maydell 2831e2fcbf42SPeter Maydell ``dstport=dstport`` 2832e2fcbf42SPeter Maydell destination udp port. 2833e2fcbf42SPeter Maydell 2834e2fcbf42SPeter Maydell ``ipv6`` 2835e2fcbf42SPeter Maydell force v6, otherwise defaults to v4. 2836e2fcbf42SPeter Maydell 2837e2fcbf42SPeter Maydell ``rxcookie=rxcookie``; \ ``txcookie=txcookie`` 2838e2fcbf42SPeter Maydell Cookies are a weak form of security in the l2tpv3 specification. 2839e2fcbf42SPeter Maydell Their function is mostly to prevent misconfiguration. By default 2840e2fcbf42SPeter Maydell they are 32 bit. 2841e2fcbf42SPeter Maydell 2842e2fcbf42SPeter Maydell ``cookie64`` 2843e2fcbf42SPeter Maydell Set cookie size to 64 bit instead of the default 32 2844e2fcbf42SPeter Maydell 2845e2fcbf42SPeter Maydell ``counter=off`` 2846e2fcbf42SPeter Maydell Force a 'cut-down' L2TPv3 with no counter as in 2847e2fcbf42SPeter Maydell draft-mkonstan-l2tpext-keyed-ipv6-tunnel-00 2848e2fcbf42SPeter Maydell 2849e2fcbf42SPeter Maydell ``pincounter=on`` 2850e2fcbf42SPeter Maydell Work around broken counter handling in peer. This may also help 2851e2fcbf42SPeter Maydell on networks which have packet reorder. 2852e2fcbf42SPeter Maydell 2853e2fcbf42SPeter Maydell ``offset=offset`` 2854e2fcbf42SPeter Maydell Add an extra offset between header and data 2855e2fcbf42SPeter Maydell 2856e2fcbf42SPeter Maydell For example, to attach a VM running on host 4.3.2.1 via L2TPv3 to 2857e2fcbf42SPeter Maydell the bridge br-lan on the remote Linux host 1.2.3.4: 2858e2fcbf42SPeter Maydell 285909ce5f2dSPeter Maydell .. parsed-literal:: 2860e2fcbf42SPeter Maydell 2861e2fcbf42SPeter Maydell # Setup tunnel on linux host using raw ip as encapsulation 2862e2fcbf42SPeter Maydell # on 1.2.3.4 2863e2fcbf42SPeter Maydell ip l2tp add tunnel remote 4.3.2.1 local 1.2.3.4 tunnel_id 1 peer_tunnel_id 1 \ 2864e2fcbf42SPeter Maydell encap udp udp_sport 16384 udp_dport 16384 2865e2fcbf42SPeter Maydell ip l2tp add session tunnel_id 1 name vmtunnel0 session_id \ 2866e2fcbf42SPeter Maydell 0xFFFFFFFF peer_session_id 0xFFFFFFFF 2867e2fcbf42SPeter Maydell ifconfig vmtunnel0 mtu 1500 2868e2fcbf42SPeter Maydell ifconfig vmtunnel0 up 2869e2fcbf42SPeter Maydell brctl addif br-lan vmtunnel0 2870e2fcbf42SPeter Maydell 2871e2fcbf42SPeter Maydell 2872e2fcbf42SPeter Maydell # on 4.3.2.1 2873e2fcbf42SPeter Maydell # launch QEMU instance - if your network has reorder or is very lossy add ,pincounter 2874e2fcbf42SPeter Maydell 2875e2fcbf42SPeter Maydell |qemu_system| linux.img -device e1000,netdev=n1 \ 2876e2fcbf42SPeter Maydell -netdev l2tpv3,id=n1,src=4.2.3.1,dst=1.2.3.4,udp,srcport=16384,dstport=16384,rxsession=0xffffffff,txsession=0xffffffff,counter 2877e2fcbf42SPeter Maydell 2878e2fcbf42SPeter Maydell``-netdev vde,id=id[,sock=socketpath][,port=n][,group=groupname][,mode=octalmode]`` 2879e2fcbf42SPeter Maydell Configure VDE backend to connect to PORT n of a vde switch running 2880e2fcbf42SPeter Maydell on host and listening for incoming connections on socketpath. Use 2881e2fcbf42SPeter Maydell GROUP groupname and MODE octalmode to change default ownership and 2882e2fcbf42SPeter Maydell permissions for communication port. This option is only available if 2883e2fcbf42SPeter Maydell QEMU has been compiled with vde support enabled. 2884e2fcbf42SPeter Maydell 2885e2fcbf42SPeter Maydell Example: 2886e2fcbf42SPeter Maydell 288709ce5f2dSPeter Maydell .. parsed-literal:: 2888e2fcbf42SPeter Maydell 2889e2fcbf42SPeter Maydell # launch vde switch 2890e2fcbf42SPeter Maydell vde_switch -F -sock /tmp/myswitch 2891e2fcbf42SPeter Maydell # launch QEMU instance 2892e2fcbf42SPeter Maydell |qemu_system| linux.img -nic vde,sock=/tmp/myswitch 2893e2fcbf42SPeter Maydell 2894e2fcbf42SPeter Maydell``-netdev vhost-user,chardev=id[,vhostforce=on|off][,queues=n]`` 2895e2fcbf42SPeter Maydell Establish a vhost-user netdev, backed by a chardev id. The chardev 2896e2fcbf42SPeter Maydell should be a unix domain socket backed one. The vhost-user uses a 2897e2fcbf42SPeter Maydell specifically defined protocol to pass vhost ioctl replacement 2898e2fcbf42SPeter Maydell messages to an application on the other end of the socket. On 2899e2fcbf42SPeter Maydell non-MSIX guests, the feature can be forced with vhostforce. Use 2900e2fcbf42SPeter Maydell 'queues=n' to specify the number of queues to be created for 2901e2fcbf42SPeter Maydell multiqueue vhost-user. 2902e2fcbf42SPeter Maydell 2903e2fcbf42SPeter Maydell Example: 2904e2fcbf42SPeter Maydell 2905e2fcbf42SPeter Maydell :: 2906e2fcbf42SPeter Maydell 2907e2fcbf42SPeter Maydell qemu -m 512 -object memory-backend-file,id=mem,size=512M,mem-path=/hugetlbfs,share=on \ 2908e2fcbf42SPeter Maydell -numa node,memdev=mem \ 2909e2fcbf42SPeter Maydell -chardev socket,id=chr0,path=/path/to/socket \ 2910e2fcbf42SPeter Maydell -netdev type=vhost-user,id=net0,chardev=chr0 \ 2911e2fcbf42SPeter Maydell -device virtio-net-pci,netdev=net0 2912e2fcbf42SPeter Maydell 2913108a6481SCindy Lu``-netdev vhost-vdpa,vhostdev=/path/to/dev`` 2914108a6481SCindy Lu Establish a vhost-vdpa netdev. 2915108a6481SCindy Lu 2916108a6481SCindy Lu vDPA device is a device that uses a datapath which complies with 2917108a6481SCindy Lu the virtio specifications with a vendor specific control path. 2918108a6481SCindy Lu vDPA devices can be both physically located on the hardware or 2919108a6481SCindy Lu emulated by software. 2920108a6481SCindy Lu 2921e2fcbf42SPeter Maydell``-netdev hubport,id=id,hubid=hubid[,netdev=nd]`` 2922e2fcbf42SPeter Maydell Create a hub port on the emulated hub with ID hubid. 2923e2fcbf42SPeter Maydell 2924e2fcbf42SPeter Maydell The hubport netdev lets you connect a NIC to a QEMU emulated hub 2925e2fcbf42SPeter Maydell instead of a single netdev. Alternatively, you can also connect the 2926e2fcbf42SPeter Maydell hubport to another netdev with ID nd by using the ``netdev=nd`` 2927e2fcbf42SPeter Maydell option. 2928e2fcbf42SPeter Maydell 2929e2fcbf42SPeter Maydell``-net nic[,netdev=nd][,macaddr=mac][,model=type] [,name=name][,addr=addr][,vectors=v]`` 2930e2fcbf42SPeter Maydell Legacy option to configure or create an on-board (or machine 2931e2fcbf42SPeter Maydell default) Network Interface Card(NIC) and connect it either to the 2932e2fcbf42SPeter Maydell emulated hub with ID 0 (i.e. the default hub), or to the netdev nd. 2933e2fcbf42SPeter Maydell If model is omitted, then the default NIC model associated with the 2934e2fcbf42SPeter Maydell machine type is used. Note that the default NIC model may change in 2935e2fcbf42SPeter Maydell future QEMU releases, so it is highly recommended to always specify 2936e2fcbf42SPeter Maydell a model. Optionally, the MAC address can be changed to mac, the 2937e2fcbf42SPeter Maydell device address set to addr (PCI cards only), and a name can be 2938e2fcbf42SPeter Maydell assigned for use in monitor commands. Optionally, for PCI cards, you 2939e2fcbf42SPeter Maydell can specify the number v of MSI-X vectors that the card should have; 2940e2fcbf42SPeter Maydell this option currently only affects virtio cards; set v = 0 to 2941e2fcbf42SPeter Maydell disable MSI-X. If no ``-net`` option is specified, a single NIC is 2942e2fcbf42SPeter Maydell created. QEMU can emulate several different models of network card. 2943e2fcbf42SPeter Maydell Use ``-net nic,model=help`` for a list of available devices for your 2944e2fcbf42SPeter Maydell target. 2945e2fcbf42SPeter Maydell 2946e2fcbf42SPeter Maydell``-net user|tap|bridge|socket|l2tpv3|vde[,...][,name=name]`` 2947e2fcbf42SPeter Maydell Configure a host network backend (with the options corresponding to 2948e2fcbf42SPeter Maydell the same ``-netdev`` option) and connect it to the emulated hub 0 2949e2fcbf42SPeter Maydell (the default hub). Use name to specify the name of the hub port. 2950e2fcbf42SPeter MaydellERST 29515824d651Sblueswir1 29527273a2dbSMatthew BoothDEFHEADING() 29537273a2dbSMatthew Booth 2954de6b4f90SMarkus ArmbrusterDEFHEADING(Character device options:) 29557273a2dbSMatthew Booth 29567273a2dbSMatthew BoothDEF("chardev", HAS_ARG, QEMU_OPTION_chardev, 2957517b3d40SLin Ma "-chardev help\n" 2958d0d7708bSDaniel P. Berrange "-chardev null,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 29595dd1f02bSCorey Minyard "-chardev socket,id=id[,host=host],port=port[,to=to][,ipv4][,ipv6][,nodelay][,reconnect=seconds]\n" 2960981b06e7SJulia Suvorova " [,server][,nowait][,telnet][,websocket][,reconnect=seconds][,mux=on|off]\n" 2961fd4a5fd4SDaniel P. Berrange " [,logfile=PATH][,logappend=on|off][,tls-creds=ID][,tls-authz=ID] (tcp)\n" 2962981b06e7SJulia Suvorova "-chardev socket,id=id,path=path[,server][,nowait][,telnet][,websocket][,reconnect=seconds]\n" 2963e339273bSxiaoqiang zhao " [,mux=on|off][,logfile=PATH][,logappend=on|off][,abstract=on|off][,tight=on|off] (unix)\n" 29647273a2dbSMatthew Booth "-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr]\n" 296597331287SJan Kiszka " [,localport=localport][,ipv4][,ipv6][,mux=on|off]\n" 2966d0d7708bSDaniel P. Berrange " [,logfile=PATH][,logappend=on|off]\n" 2967d0d7708bSDaniel P. Berrange "-chardev msmouse,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 29687273a2dbSMatthew Booth "-chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]\n" 2969d0d7708bSDaniel P. Berrange " [,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 2970d0d7708bSDaniel P. Berrange "-chardev ringbuf,id=id[,size=size][,logfile=PATH][,logappend=on|off]\n" 2971d0d7708bSDaniel P. Berrange "-chardev file,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 2972d0d7708bSDaniel P. Berrange "-chardev pipe,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 29737273a2dbSMatthew Booth#ifdef _WIN32 2974d0d7708bSDaniel P. Berrange "-chardev console,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 2975d0d7708bSDaniel P. Berrange "-chardev serial,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 29767273a2dbSMatthew Booth#else 2977d0d7708bSDaniel P. Berrange "-chardev pty,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 2978d0d7708bSDaniel P. Berrange "-chardev stdio,id=id[,mux=on|off][,signal=on|off][,logfile=PATH][,logappend=on|off]\n" 29797273a2dbSMatthew Booth#endif 29807273a2dbSMatthew Booth#ifdef CONFIG_BRLAPI 2981d0d7708bSDaniel P. Berrange "-chardev braille,id=id[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 29827273a2dbSMatthew Booth#endif 29837273a2dbSMatthew Booth#if defined(__linux__) || defined(__sun__) || defined(__FreeBSD__) \ 29847273a2dbSMatthew Booth || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) 2985d0d7708bSDaniel P. Berrange "-chardev serial,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 2986d0d7708bSDaniel P. Berrange "-chardev tty,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 29877273a2dbSMatthew Booth#endif 29887273a2dbSMatthew Booth#if defined(__linux__) || defined(__FreeBSD__) || defined(__DragonFly__) 2989d0d7708bSDaniel P. Berrange "-chardev parallel,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 2990d0d7708bSDaniel P. Berrange "-chardev parport,id=id,path=path[,mux=on|off][,logfile=PATH][,logappend=on|off]\n" 29917273a2dbSMatthew Booth#endif 2992cbcc6336SAlon Levy#if defined(CONFIG_SPICE) 2993d0d7708bSDaniel P. Berrange "-chardev spicevmc,id=id,name=name[,debug=debug][,logfile=PATH][,logappend=on|off]\n" 2994d0d7708bSDaniel P. Berrange "-chardev spiceport,id=id,name=name[,debug=debug][,logfile=PATH][,logappend=on|off]\n" 2995cbcc6336SAlon Levy#endif 2996ad96090aSBlue Swirl , QEMU_ARCH_ALL 29977273a2dbSMatthew Booth) 29987273a2dbSMatthew Booth 2999e2fcbf42SPeter MaydellSRST 3000e2fcbf42SPeter MaydellThe general form of a character device option is: 3001e2fcbf42SPeter Maydell 3002e2fcbf42SPeter Maydell``-chardev backend,id=id[,mux=on|off][,options]`` 3003e2fcbf42SPeter Maydell Backend is one of: ``null``, ``socket``, ``udp``, ``msmouse``, 3004e2fcbf42SPeter Maydell ``vc``, ``ringbuf``, ``file``, ``pipe``, ``console``, ``serial``, 3005e2fcbf42SPeter Maydell ``pty``, ``stdio``, ``braille``, ``tty``, ``parallel``, ``parport``, 3006e2fcbf42SPeter Maydell ``spicevmc``, ``spiceport``. The specific backend will determine the 3007e2fcbf42SPeter Maydell applicable options. 3008e2fcbf42SPeter Maydell 3009e2fcbf42SPeter Maydell Use ``-chardev help`` to print all available chardev backend types. 3010e2fcbf42SPeter Maydell 3011e2fcbf42SPeter Maydell All devices must have an id, which can be any string up to 127 3012e2fcbf42SPeter Maydell characters long. It is used to uniquely identify this device in 3013e2fcbf42SPeter Maydell other command line directives. 3014e2fcbf42SPeter Maydell 3015e2fcbf42SPeter Maydell A character device may be used in multiplexing mode by multiple 3016e2fcbf42SPeter Maydell front-ends. Specify ``mux=on`` to enable this mode. A multiplexer is 3017e2fcbf42SPeter Maydell a "1:N" device, and here the "1" end is your specified chardev 3018e2fcbf42SPeter Maydell backend, and the "N" end is the various parts of QEMU that can talk 3019e2fcbf42SPeter Maydell to a chardev. If you create a chardev with ``id=myid`` and 3020e2fcbf42SPeter Maydell ``mux=on``, QEMU will create a multiplexer with your specified ID, 3021e2fcbf42SPeter Maydell and you can then configure multiple front ends to use that chardev 3022e2fcbf42SPeter Maydell ID for their input/output. Up to four different front ends can be 3023e2fcbf42SPeter Maydell connected to a single multiplexed chardev. (Without multiplexing 3024e2fcbf42SPeter Maydell enabled, a chardev can only be used by a single front end.) For 3025e2fcbf42SPeter Maydell instance you could use this to allow a single stdio chardev to be 3026e2fcbf42SPeter Maydell used by two serial ports and the QEMU monitor: 3027e2fcbf42SPeter Maydell 3028e2fcbf42SPeter Maydell :: 3029e2fcbf42SPeter Maydell 3030e2fcbf42SPeter Maydell -chardev stdio,mux=on,id=char0 \ 3031e2fcbf42SPeter Maydell -mon chardev=char0,mode=readline \ 3032e2fcbf42SPeter Maydell -serial chardev:char0 \ 3033e2fcbf42SPeter Maydell -serial chardev:char0 3034e2fcbf42SPeter Maydell 3035e2fcbf42SPeter Maydell You can have more than one multiplexer in a system configuration; 3036e2fcbf42SPeter Maydell for instance you could have a TCP port multiplexed between UART 0 3037e2fcbf42SPeter Maydell and UART 1, and stdio multiplexed between the QEMU monitor and a 3038e2fcbf42SPeter Maydell parallel port: 3039e2fcbf42SPeter Maydell 3040e2fcbf42SPeter Maydell :: 3041e2fcbf42SPeter Maydell 3042e2fcbf42SPeter Maydell -chardev stdio,mux=on,id=char0 \ 3043e2fcbf42SPeter Maydell -mon chardev=char0,mode=readline \ 3044e2fcbf42SPeter Maydell -parallel chardev:char0 \ 3045e2fcbf42SPeter Maydell -chardev tcp,...,mux=on,id=char1 \ 3046e2fcbf42SPeter Maydell -serial chardev:char1 \ 3047e2fcbf42SPeter Maydell -serial chardev:char1 3048e2fcbf42SPeter Maydell 3049e2fcbf42SPeter Maydell When you're using a multiplexed character device, some escape 3050e2fcbf42SPeter Maydell sequences are interpreted in the input. See :ref:`mux_005fkeys`. 3051e2fcbf42SPeter Maydell 3052e2fcbf42SPeter Maydell Note that some other command line options may implicitly create 3053e2fcbf42SPeter Maydell multiplexed character backends; for instance ``-serial mon:stdio`` 3054e2fcbf42SPeter Maydell creates a multiplexed stdio backend connected to the serial port and 3055e2fcbf42SPeter Maydell the QEMU monitor, and ``-nographic`` also multiplexes the console 3056e2fcbf42SPeter Maydell and the monitor to stdio. 3057e2fcbf42SPeter Maydell 3058e2fcbf42SPeter Maydell There is currently no support for multiplexing in the other 3059e2fcbf42SPeter Maydell direction (where a single QEMU front end takes input and output from 3060e2fcbf42SPeter Maydell multiple chardevs). 3061e2fcbf42SPeter Maydell 3062e2fcbf42SPeter Maydell Every backend supports the ``logfile`` option, which supplies the 3063e2fcbf42SPeter Maydell path to a file to record all data transmitted via the backend. The 3064e2fcbf42SPeter Maydell ``logappend`` option controls whether the log file will be truncated 3065e2fcbf42SPeter Maydell or appended to when opened. 3066e2fcbf42SPeter Maydell 3067e2fcbf42SPeter MaydellThe available backends are: 3068e2fcbf42SPeter Maydell 3069e2fcbf42SPeter Maydell``-chardev null,id=id`` 3070e2fcbf42SPeter Maydell A void device. This device will not emit any data, and will drop any 3071e2fcbf42SPeter Maydell data it receives. The null backend does not take any options. 3072e2fcbf42SPeter Maydell 3073e2fcbf42SPeter Maydell``-chardev socket,id=id[,TCP options or unix options][,server][,nowait][,telnet][,websocket][,reconnect=seconds][,tls-creds=id][,tls-authz=id]`` 3074e2fcbf42SPeter Maydell Create a two-way stream socket, which can be either a TCP or a unix 3075e2fcbf42SPeter Maydell socket. A unix socket will be created if ``path`` is specified. 3076e2fcbf42SPeter Maydell Behaviour is undefined if TCP options are specified for a unix 3077e2fcbf42SPeter Maydell socket. 3078e2fcbf42SPeter Maydell 3079e2fcbf42SPeter Maydell ``server`` specifies that the socket shall be a listening socket. 3080e2fcbf42SPeter Maydell 3081e2fcbf42SPeter Maydell ``nowait`` specifies that QEMU should not block waiting for a client 3082e2fcbf42SPeter Maydell to connect to a listening socket. 3083e2fcbf42SPeter Maydell 3084e2fcbf42SPeter Maydell ``telnet`` specifies that traffic on the socket should interpret 3085e2fcbf42SPeter Maydell telnet escape sequences. 3086e2fcbf42SPeter Maydell 3087e2fcbf42SPeter Maydell ``websocket`` specifies that the socket uses WebSocket protocol for 3088e2fcbf42SPeter Maydell communication. 3089e2fcbf42SPeter Maydell 3090e2fcbf42SPeter Maydell ``reconnect`` sets the timeout for reconnecting on non-server 3091e2fcbf42SPeter Maydell sockets when the remote end goes away. qemu will delay this many 3092e2fcbf42SPeter Maydell seconds and then attempt to reconnect. Zero disables reconnecting, 3093e2fcbf42SPeter Maydell and is the default. 3094e2fcbf42SPeter Maydell 3095e2fcbf42SPeter Maydell ``tls-creds`` requests enablement of the TLS protocol for 3096e2fcbf42SPeter Maydell encryption, and specifies the id of the TLS credentials to use for 3097e2fcbf42SPeter Maydell the handshake. The credentials must be previously created with the 3098e2fcbf42SPeter Maydell ``-object tls-creds`` argument. 3099e2fcbf42SPeter Maydell 3100e2fcbf42SPeter Maydell ``tls-auth`` provides the ID of the QAuthZ authorization object 3101e2fcbf42SPeter Maydell against which the client's x509 distinguished name will be 3102e2fcbf42SPeter Maydell validated. This object is only resolved at time of use, so can be 3103e2fcbf42SPeter Maydell deleted and recreated on the fly while the chardev server is active. 3104e2fcbf42SPeter Maydell If missing, it will default to denying access. 3105e2fcbf42SPeter Maydell 3106e2fcbf42SPeter Maydell TCP and unix socket options are given below: 3107e2fcbf42SPeter Maydell 3108e2fcbf42SPeter Maydell ``TCP options: port=port[,host=host][,to=to][,ipv4][,ipv6][,nodelay]`` 3109e2fcbf42SPeter Maydell ``host`` for a listening socket specifies the local address to 3110e2fcbf42SPeter Maydell be bound. For a connecting socket species the remote host to 3111e2fcbf42SPeter Maydell connect to. ``host`` is optional for listening sockets. If not 3112e2fcbf42SPeter Maydell specified it defaults to ``0.0.0.0``. 3113e2fcbf42SPeter Maydell 3114e2fcbf42SPeter Maydell ``port`` for a listening socket specifies the local port to be 3115e2fcbf42SPeter Maydell bound. For a connecting socket specifies the port on the remote 3116e2fcbf42SPeter Maydell host to connect to. ``port`` can be given as either a port 3117e2fcbf42SPeter Maydell number or a service name. ``port`` is required. 3118e2fcbf42SPeter Maydell 3119e2fcbf42SPeter Maydell ``to`` is only relevant to listening sockets. If it is 3120e2fcbf42SPeter Maydell specified, and ``port`` cannot be bound, QEMU will attempt to 3121e2fcbf42SPeter Maydell bind to subsequent ports up to and including ``to`` until it 3122e2fcbf42SPeter Maydell succeeds. ``to`` must be specified as a port number. 3123e2fcbf42SPeter Maydell 3124e2fcbf42SPeter Maydell ``ipv4`` and ``ipv6`` specify that either IPv4 or IPv6 must be 3125e2fcbf42SPeter Maydell used. If neither is specified the socket may use either 3126e2fcbf42SPeter Maydell protocol. 3127e2fcbf42SPeter Maydell 3128e2fcbf42SPeter Maydell ``nodelay`` disables the Nagle algorithm. 3129e2fcbf42SPeter Maydell 3130e339273bSxiaoqiang zhao ``unix options: path=path[,abstract=on|off][,tight=on|off]`` 3131e2fcbf42SPeter Maydell ``path`` specifies the local path of the unix socket. ``path`` 3132e2fcbf42SPeter Maydell is required. 3133e339273bSxiaoqiang zhao ``abstract`` specifies the use of the abstract socket namespace, 3134e339273bSxiaoqiang zhao rather than the filesystem. Optional, defaults to false. 3135e339273bSxiaoqiang zhao ``tight`` sets the socket length of abstract sockets to their minimum, 3136e339273bSxiaoqiang zhao rather than the full sun_path length. Optional, defaults to true. 3137e2fcbf42SPeter Maydell 3138e2fcbf42SPeter Maydell``-chardev udp,id=id[,host=host],port=port[,localaddr=localaddr][,localport=localport][,ipv4][,ipv6]`` 3139e2fcbf42SPeter Maydell Sends all traffic from the guest to a remote host over UDP. 3140e2fcbf42SPeter Maydell 3141e2fcbf42SPeter Maydell ``host`` specifies the remote host to connect to. If not specified 3142e2fcbf42SPeter Maydell it defaults to ``localhost``. 3143e2fcbf42SPeter Maydell 3144e2fcbf42SPeter Maydell ``port`` specifies the port on the remote host to connect to. 3145e2fcbf42SPeter Maydell ``port`` is required. 3146e2fcbf42SPeter Maydell 3147e2fcbf42SPeter Maydell ``localaddr`` specifies the local address to bind to. If not 3148e2fcbf42SPeter Maydell specified it defaults to ``0.0.0.0``. 3149e2fcbf42SPeter Maydell 3150e2fcbf42SPeter Maydell ``localport`` specifies the local port to bind to. If not specified 3151e2fcbf42SPeter Maydell any available local port will be used. 3152e2fcbf42SPeter Maydell 3153e2fcbf42SPeter Maydell ``ipv4`` and ``ipv6`` specify that either IPv4 or IPv6 must be used. 3154e2fcbf42SPeter Maydell If neither is specified the device may use either protocol. 3155e2fcbf42SPeter Maydell 3156e2fcbf42SPeter Maydell``-chardev msmouse,id=id`` 3157e2fcbf42SPeter Maydell Forward QEMU's emulated msmouse events to the guest. ``msmouse`` 3158e2fcbf42SPeter Maydell does not take any options. 3159e2fcbf42SPeter Maydell 3160e2fcbf42SPeter Maydell``-chardev vc,id=id[[,width=width][,height=height]][[,cols=cols][,rows=rows]]`` 3161e2fcbf42SPeter Maydell Connect to a QEMU text console. ``vc`` may optionally be given a 3162e2fcbf42SPeter Maydell specific size. 3163e2fcbf42SPeter Maydell 3164e2fcbf42SPeter Maydell ``width`` and ``height`` specify the width and height respectively 3165e2fcbf42SPeter Maydell of the console, in pixels. 3166e2fcbf42SPeter Maydell 3167e2fcbf42SPeter Maydell ``cols`` and ``rows`` specify that the console be sized to fit a 3168e2fcbf42SPeter Maydell text console with the given dimensions. 3169e2fcbf42SPeter Maydell 3170e2fcbf42SPeter Maydell``-chardev ringbuf,id=id[,size=size]`` 3171e2fcbf42SPeter Maydell Create a ring buffer with fixed size ``size``. size must be a power 3172e2fcbf42SPeter Maydell of two and defaults to ``64K``. 3173e2fcbf42SPeter Maydell 3174e2fcbf42SPeter Maydell``-chardev file,id=id,path=path`` 3175e2fcbf42SPeter Maydell Log all traffic received from the guest to a file. 3176e2fcbf42SPeter Maydell 3177e2fcbf42SPeter Maydell ``path`` specifies the path of the file to be opened. This file will 3178e2fcbf42SPeter Maydell be created if it does not already exist, and overwritten if it does. 3179e2fcbf42SPeter Maydell ``path`` is required. 3180e2fcbf42SPeter Maydell 3181e2fcbf42SPeter Maydell``-chardev pipe,id=id,path=path`` 3182e2fcbf42SPeter Maydell Create a two-way connection to the guest. The behaviour differs 3183e2fcbf42SPeter Maydell slightly between Windows hosts and other hosts: 3184e2fcbf42SPeter Maydell 3185e2fcbf42SPeter Maydell On Windows, a single duplex pipe will be created at 3186e2fcbf42SPeter Maydell ``\\.pipe\path``. 3187e2fcbf42SPeter Maydell 3188e2fcbf42SPeter Maydell On other hosts, 2 pipes will be created called ``path.in`` and 3189e2fcbf42SPeter Maydell ``path.out``. Data written to ``path.in`` will be received by the 3190e2fcbf42SPeter Maydell guest. Data written by the guest can be read from ``path.out``. QEMU 3191e2fcbf42SPeter Maydell will not create these fifos, and requires them to be present. 3192e2fcbf42SPeter Maydell 3193e2fcbf42SPeter Maydell ``path`` forms part of the pipe path as described above. ``path`` is 3194e2fcbf42SPeter Maydell required. 3195e2fcbf42SPeter Maydell 3196e2fcbf42SPeter Maydell``-chardev console,id=id`` 3197e2fcbf42SPeter Maydell Send traffic from the guest to QEMU's standard output. ``console`` 3198e2fcbf42SPeter Maydell does not take any options. 3199e2fcbf42SPeter Maydell 3200e2fcbf42SPeter Maydell ``console`` is only available on Windows hosts. 3201e2fcbf42SPeter Maydell 3202e2fcbf42SPeter Maydell``-chardev serial,id=id,path=path`` 3203e2fcbf42SPeter Maydell Send traffic from the guest to a serial device on the host. 3204e2fcbf42SPeter Maydell 3205e2fcbf42SPeter Maydell On Unix hosts serial will actually accept any tty device, not only 3206e2fcbf42SPeter Maydell serial lines. 3207e2fcbf42SPeter Maydell 3208e2fcbf42SPeter Maydell ``path`` specifies the name of the serial device to open. 3209e2fcbf42SPeter Maydell 3210e2fcbf42SPeter Maydell``-chardev pty,id=id`` 3211e2fcbf42SPeter Maydell Create a new pseudo-terminal on the host and connect to it. ``pty`` 3212e2fcbf42SPeter Maydell does not take any options. 3213e2fcbf42SPeter Maydell 3214e2fcbf42SPeter Maydell ``pty`` is not available on Windows hosts. 3215e2fcbf42SPeter Maydell 3216e2fcbf42SPeter Maydell``-chardev stdio,id=id[,signal=on|off]`` 3217e2fcbf42SPeter Maydell Connect to standard input and standard output of the QEMU process. 3218e2fcbf42SPeter Maydell 3219e2fcbf42SPeter Maydell ``signal`` controls if signals are enabled on the terminal, that 3220e2fcbf42SPeter Maydell includes exiting QEMU with the key sequence Control-c. This option 3221e2fcbf42SPeter Maydell is enabled by default, use ``signal=off`` to disable it. 3222e2fcbf42SPeter Maydell 3223e2fcbf42SPeter Maydell``-chardev braille,id=id`` 3224e2fcbf42SPeter Maydell Connect to a local BrlAPI server. ``braille`` does not take any 3225e2fcbf42SPeter Maydell options. 3226e2fcbf42SPeter Maydell 3227e2fcbf42SPeter Maydell``-chardev tty,id=id,path=path`` 3228e2fcbf42SPeter Maydell ``tty`` is only available on Linux, Sun, FreeBSD, NetBSD, OpenBSD 3229e2fcbf42SPeter Maydell and DragonFlyBSD hosts. It is an alias for ``serial``. 3230e2fcbf42SPeter Maydell 3231e2fcbf42SPeter Maydell ``path`` specifies the path to the tty. ``path`` is required. 3232e2fcbf42SPeter Maydell 323309ce5f2dSPeter Maydell``-chardev parallel,id=id,path=path`` 323409ce5f2dSPeter Maydell \ 323509ce5f2dSPeter Maydell``-chardev parport,id=id,path=path`` 3236e2fcbf42SPeter Maydell ``parallel`` is only available on Linux, FreeBSD and DragonFlyBSD 3237e2fcbf42SPeter Maydell hosts. 3238e2fcbf42SPeter Maydell 3239e2fcbf42SPeter Maydell Connect to a local parallel port. 3240e2fcbf42SPeter Maydell 3241e2fcbf42SPeter Maydell ``path`` specifies the path to the parallel port device. ``path`` is 3242e2fcbf42SPeter Maydell required. 3243e2fcbf42SPeter Maydell 3244e2fcbf42SPeter Maydell``-chardev spicevmc,id=id,debug=debug,name=name`` 3245e2fcbf42SPeter Maydell ``spicevmc`` is only available when spice support is built in. 3246e2fcbf42SPeter Maydell 3247e2fcbf42SPeter Maydell ``debug`` debug level for spicevmc 3248e2fcbf42SPeter Maydell 3249e2fcbf42SPeter Maydell ``name`` name of spice channel to connect to 3250e2fcbf42SPeter Maydell 3251e2fcbf42SPeter Maydell Connect to a spice virtual machine channel, such as vdiport. 3252e2fcbf42SPeter Maydell 3253e2fcbf42SPeter Maydell``-chardev spiceport,id=id,debug=debug,name=name`` 3254e2fcbf42SPeter Maydell ``spiceport`` is only available when spice support is built in. 3255e2fcbf42SPeter Maydell 3256e2fcbf42SPeter Maydell ``debug`` debug level for spicevmc 3257e2fcbf42SPeter Maydell 3258e2fcbf42SPeter Maydell ``name`` name of spice port to connect to 3259e2fcbf42SPeter Maydell 3260e2fcbf42SPeter Maydell Connect to a spice port, allowing a Spice client to handle the 3261e2fcbf42SPeter Maydell traffic identified by a name (preferably a fqdn). 3262e2fcbf42SPeter MaydellERST 32637273a2dbSMatthew Booth 32647273a2dbSMatthew BoothDEFHEADING() 32657273a2dbSMatthew Booth 3266d1a0cf73SStefan Berger#ifdef CONFIG_TPM 3267de6b4f90SMarkus ArmbrusterDEFHEADING(TPM device options:) 3268d1a0cf73SStefan Berger 3269d1a0cf73SStefan BergerDEF("tpmdev", HAS_ARG, QEMU_OPTION_tpmdev, \ 327092dcc234SStefan Berger "-tpmdev passthrough,id=id[,path=path][,cancel-path=path]\n" 327192dcc234SStefan Berger " use path to provide path to a character device; default is /dev/tpm0\n" 327292dcc234SStefan Berger " use cancel-path to provide path to TPM's cancel sysfs entry; if\n" 3273f4ede81eSAmarnath Valluri " not provided it will be searched for in /sys/class/misc/tpm?/device\n" 3274f4ede81eSAmarnath Valluri "-tpmdev emulator,id=id,chardev=dev\n" 3275f4ede81eSAmarnath Valluri " configure the TPM device using chardev backend\n", 3276d1a0cf73SStefan Berger QEMU_ARCH_ALL) 3277e2fcbf42SPeter MaydellSRST 3278e2fcbf42SPeter MaydellThe general form of a TPM device option is: 3279e2fcbf42SPeter Maydell 3280e2fcbf42SPeter Maydell``-tpmdev backend,id=id[,options]`` 3281e2fcbf42SPeter Maydell The specific backend type will determine the applicable options. The 3282e2fcbf42SPeter Maydell ``-tpmdev`` option creates the TPM backend and requires a 3283e2fcbf42SPeter Maydell ``-device`` option that specifies the TPM frontend interface model. 3284e2fcbf42SPeter Maydell 3285e2fcbf42SPeter Maydell Use ``-tpmdev help`` to print all available TPM backend types. 3286e2fcbf42SPeter Maydell 3287e2fcbf42SPeter MaydellThe available backends are: 3288e2fcbf42SPeter Maydell 3289e2fcbf42SPeter Maydell``-tpmdev passthrough,id=id,path=path,cancel-path=cancel-path`` 3290e2fcbf42SPeter Maydell (Linux-host only) Enable access to the host's TPM using the 3291e2fcbf42SPeter Maydell passthrough driver. 3292e2fcbf42SPeter Maydell 3293e2fcbf42SPeter Maydell ``path`` specifies the path to the host's TPM device, i.e., on a 3294e2fcbf42SPeter Maydell Linux host this would be ``/dev/tpm0``. ``path`` is optional and by 3295e2fcbf42SPeter Maydell default ``/dev/tpm0`` is used. 3296e2fcbf42SPeter Maydell 3297e2fcbf42SPeter Maydell ``cancel-path`` specifies the path to the host TPM device's sysfs 3298e2fcbf42SPeter Maydell entry allowing for cancellation of an ongoing TPM command. 3299e2fcbf42SPeter Maydell ``cancel-path`` is optional and by default QEMU will search for the 3300e2fcbf42SPeter Maydell sysfs entry to use. 3301e2fcbf42SPeter Maydell 3302e2fcbf42SPeter Maydell Some notes about using the host's TPM with the passthrough driver: 3303e2fcbf42SPeter Maydell 3304e2fcbf42SPeter Maydell The TPM device accessed by the passthrough driver must not be used 3305e2fcbf42SPeter Maydell by any other application on the host. 3306e2fcbf42SPeter Maydell 3307e2fcbf42SPeter Maydell Since the host's firmware (BIOS/UEFI) has already initialized the 3308e2fcbf42SPeter Maydell TPM, the VM's firmware (BIOS/UEFI) will not be able to initialize 3309e2fcbf42SPeter Maydell the TPM again and may therefore not show a TPM-specific menu that 3310e2fcbf42SPeter Maydell would otherwise allow the user to configure the TPM, e.g., allow the 3311e2fcbf42SPeter Maydell user to enable/disable or activate/deactivate the TPM. Further, if 3312e2fcbf42SPeter Maydell TPM ownership is released from within a VM then the host's TPM will 3313e2fcbf42SPeter Maydell get disabled and deactivated. To enable and activate the TPM again 3314e2fcbf42SPeter Maydell afterwards, the host has to be rebooted and the user is required to 3315e2fcbf42SPeter Maydell enter the firmware's menu to enable and activate the TPM. If the TPM 3316e2fcbf42SPeter Maydell is left disabled and/or deactivated most TPM commands will fail. 3317e2fcbf42SPeter Maydell 3318e2fcbf42SPeter Maydell To create a passthrough TPM use the following two options: 3319e2fcbf42SPeter Maydell 3320e2fcbf42SPeter Maydell :: 3321e2fcbf42SPeter Maydell 3322e2fcbf42SPeter Maydell -tpmdev passthrough,id=tpm0 -device tpm-tis,tpmdev=tpm0 3323e2fcbf42SPeter Maydell 3324e2fcbf42SPeter Maydell Note that the ``-tpmdev`` id is ``tpm0`` and is referenced by 3325e2fcbf42SPeter Maydell ``tpmdev=tpm0`` in the device option. 3326e2fcbf42SPeter Maydell 3327e2fcbf42SPeter Maydell``-tpmdev emulator,id=id,chardev=dev`` 3328e2fcbf42SPeter Maydell (Linux-host only) Enable access to a TPM emulator using Unix domain 3329e2fcbf42SPeter Maydell socket based chardev backend. 3330e2fcbf42SPeter Maydell 3331e2fcbf42SPeter Maydell ``chardev`` specifies the unique ID of a character device backend 3332e2fcbf42SPeter Maydell that provides connection to the software TPM server. 3333e2fcbf42SPeter Maydell 3334e2fcbf42SPeter Maydell To create a TPM emulator backend device with chardev socket backend: 3335e2fcbf42SPeter Maydell 3336e2fcbf42SPeter Maydell :: 3337e2fcbf42SPeter Maydell 3338e2fcbf42SPeter Maydell -chardev socket,id=chrtpm,path=/tmp/swtpm-sock -tpmdev emulator,id=tpm0,chardev=chrtpm -device tpm-tis,tpmdev=tpm0 3339e2fcbf42SPeter MaydellERST 3340d1a0cf73SStefan Berger 3341d1a0cf73SStefan BergerDEFHEADING() 3342d1a0cf73SStefan Berger 3343d1a0cf73SStefan Berger#endif 3344d1a0cf73SStefan Berger 3345de6b4f90SMarkus ArmbrusterDEFHEADING(Linux/Multiboot boot specific:) 3346e2fcbf42SPeter MaydellSRST 3347e2fcbf42SPeter MaydellWhen using these options, you can use a given Linux or Multiboot kernel 3348e2fcbf42SPeter Maydellwithout installing it in the disk image. It can be useful for easier 3349e2fcbf42SPeter Maydelltesting of various kernels. 3350e2fcbf42SPeter Maydell 3351e2fcbf42SPeter Maydell 3352e2fcbf42SPeter MaydellERST 33535824d651Sblueswir1 33545824d651Sblueswir1DEF("kernel", HAS_ARG, QEMU_OPTION_kernel, \ 3355ad96090aSBlue Swirl "-kernel bzImage use 'bzImage' as kernel image\n", QEMU_ARCH_ALL) 3356e2fcbf42SPeter MaydellSRST 3357e2fcbf42SPeter Maydell``-kernel bzImage`` 3358e2fcbf42SPeter Maydell Use bzImage as kernel image. The kernel can be either a Linux kernel 3359e2fcbf42SPeter Maydell or in multiboot format. 3360e2fcbf42SPeter MaydellERST 33615824d651Sblueswir1 33625824d651Sblueswir1DEF("append", HAS_ARG, QEMU_OPTION_append, \ 3363ad96090aSBlue Swirl "-append cmdline use 'cmdline' as kernel command line\n", QEMU_ARCH_ALL) 3364e2fcbf42SPeter MaydellSRST 3365e2fcbf42SPeter Maydell``-append cmdline`` 3366e2fcbf42SPeter Maydell Use cmdline as kernel command line 3367e2fcbf42SPeter MaydellERST 33685824d651Sblueswir1 33695824d651Sblueswir1DEF("initrd", HAS_ARG, QEMU_OPTION_initrd, \ 3370ad96090aSBlue Swirl "-initrd file use 'file' as initial ram disk\n", QEMU_ARCH_ALL) 3371e2fcbf42SPeter MaydellSRST 3372e2fcbf42SPeter Maydell``-initrd file`` 3373e2fcbf42SPeter Maydell Use file as initial ram disk. 3374e2fcbf42SPeter Maydell 3375e2fcbf42SPeter Maydell``-initrd "file1 arg=foo,file2"`` 3376e2fcbf42SPeter Maydell This syntax is only available with multiboot. 3377e2fcbf42SPeter Maydell 3378e2fcbf42SPeter Maydell Use file1 and file2 as modules and pass arg=foo as parameter to the 3379e2fcbf42SPeter Maydell first module. 3380e2fcbf42SPeter MaydellERST 33815824d651Sblueswir1 3382412beee6SGrant LikelyDEF("dtb", HAS_ARG, QEMU_OPTION_dtb, \ 3383379b5c7cSPeter A. G. Crosthwaite "-dtb file use 'file' as device tree image\n", QEMU_ARCH_ALL) 3384e2fcbf42SPeter MaydellSRST 3385e2fcbf42SPeter Maydell``-dtb file`` 3386e2fcbf42SPeter Maydell Use file as a device tree binary (dtb) image and pass it to the 3387e2fcbf42SPeter Maydell kernel on boot. 3388e2fcbf42SPeter MaydellERST 3389412beee6SGrant Likely 33905824d651Sblueswir1DEFHEADING() 33915824d651Sblueswir1 3392de6b4f90SMarkus ArmbrusterDEFHEADING(Debug/Expert options:) 33935824d651Sblueswir1 339481b2b810SGabriel L. SomloDEF("fw_cfg", HAS_ARG, QEMU_OPTION_fwcfg, 339581b2b810SGabriel L. Somlo "-fw_cfg [name=]<name>,file=<file>\n" 339663d3145aSMarkus Armbruster " add named fw_cfg entry with contents from file\n" 33976407d76eSGabriel L. Somlo "-fw_cfg [name=]<name>,string=<str>\n" 339863d3145aSMarkus Armbruster " add named fw_cfg entry with contents from string\n", 339981b2b810SGabriel L. Somlo QEMU_ARCH_ALL) 3400e2fcbf42SPeter MaydellSRST 3401e2fcbf42SPeter Maydell``-fw_cfg [name=]name,file=file`` 3402e2fcbf42SPeter Maydell Add named fw\_cfg entry with contents from file file. 3403e2fcbf42SPeter Maydell 3404e2fcbf42SPeter Maydell``-fw_cfg [name=]name,string=str`` 3405e2fcbf42SPeter Maydell Add named fw\_cfg entry with contents from string str. 3406e2fcbf42SPeter Maydell 3407e2fcbf42SPeter Maydell The terminating NUL character of the contents of str will not be 3408e2fcbf42SPeter Maydell included as part of the fw\_cfg item data. To insert contents with 3409e2fcbf42SPeter Maydell embedded NUL characters, you have to use the file parameter. 3410e2fcbf42SPeter Maydell 3411e2fcbf42SPeter Maydell The fw\_cfg entries are passed by QEMU through to the guest. 3412e2fcbf42SPeter Maydell 3413e2fcbf42SPeter Maydell Example: 3414e2fcbf42SPeter Maydell 3415e2fcbf42SPeter Maydell :: 3416e2fcbf42SPeter Maydell 3417e2fcbf42SPeter Maydell -fw_cfg name=opt/com.mycompany/blob,file=./my_blob.bin 3418e2fcbf42SPeter Maydell 3419e2fcbf42SPeter Maydell creates an fw\_cfg entry named opt/com.mycompany/blob with contents 3420e2fcbf42SPeter Maydell from ./my\_blob.bin. 3421e2fcbf42SPeter MaydellERST 342281b2b810SGabriel L. Somlo 34235824d651Sblueswir1DEF("serial", HAS_ARG, QEMU_OPTION_serial, \ 3424ad96090aSBlue Swirl "-serial dev redirect the serial port to char device 'dev'\n", 3425ad96090aSBlue Swirl QEMU_ARCH_ALL) 3426e2fcbf42SPeter MaydellSRST 3427e2fcbf42SPeter Maydell``-serial dev`` 3428e2fcbf42SPeter Maydell Redirect the virtual serial port to host character device dev. The 3429e2fcbf42SPeter Maydell default device is ``vc`` in graphical mode and ``stdio`` in non 3430e2fcbf42SPeter Maydell graphical mode. 3431e2fcbf42SPeter Maydell 3432e2fcbf42SPeter Maydell This option can be used several times to simulate up to 4 serial 3433e2fcbf42SPeter Maydell ports. 3434e2fcbf42SPeter Maydell 3435e2fcbf42SPeter Maydell Use ``-serial none`` to disable all serial ports. 3436e2fcbf42SPeter Maydell 3437e2fcbf42SPeter Maydell Available character devices are: 3438e2fcbf42SPeter Maydell 3439e2fcbf42SPeter Maydell ``vc[:WxH]`` 3440e2fcbf42SPeter Maydell Virtual console. Optionally, a width and height can be given in 3441e2fcbf42SPeter Maydell pixel with 3442e2fcbf42SPeter Maydell 3443e2fcbf42SPeter Maydell :: 3444e2fcbf42SPeter Maydell 3445e2fcbf42SPeter Maydell vc:800x600 3446e2fcbf42SPeter Maydell 3447e2fcbf42SPeter Maydell It is also possible to specify width or height in characters: 3448e2fcbf42SPeter Maydell 3449e2fcbf42SPeter Maydell :: 3450e2fcbf42SPeter Maydell 3451e2fcbf42SPeter Maydell vc:80Cx24C 3452e2fcbf42SPeter Maydell 3453e2fcbf42SPeter Maydell ``pty`` 3454e2fcbf42SPeter Maydell [Linux only] Pseudo TTY (a new PTY is automatically allocated) 3455e2fcbf42SPeter Maydell 3456e2fcbf42SPeter Maydell ``none`` 3457e2fcbf42SPeter Maydell No device is allocated. 3458e2fcbf42SPeter Maydell 3459e2fcbf42SPeter Maydell ``null`` 3460e2fcbf42SPeter Maydell void device 3461e2fcbf42SPeter Maydell 3462e2fcbf42SPeter Maydell ``chardev:id`` 3463e2fcbf42SPeter Maydell Use a named character device defined with the ``-chardev`` 3464e2fcbf42SPeter Maydell option. 3465e2fcbf42SPeter Maydell 3466e2fcbf42SPeter Maydell ``/dev/XXX`` 3467e2fcbf42SPeter Maydell [Linux only] Use host tty, e.g. ``/dev/ttyS0``. The host serial 3468e2fcbf42SPeter Maydell port parameters are set according to the emulated ones. 3469e2fcbf42SPeter Maydell 3470e2fcbf42SPeter Maydell ``/dev/parportN`` 3471e2fcbf42SPeter Maydell [Linux only, parallel port only] Use host parallel port N. 3472e2fcbf42SPeter Maydell Currently SPP and EPP parallel port features can be used. 3473e2fcbf42SPeter Maydell 3474e2fcbf42SPeter Maydell ``file:filename`` 3475e2fcbf42SPeter Maydell Write output to filename. No character can be read. 3476e2fcbf42SPeter Maydell 3477e2fcbf42SPeter Maydell ``stdio`` 3478e2fcbf42SPeter Maydell [Unix only] standard input/output 3479e2fcbf42SPeter Maydell 3480e2fcbf42SPeter Maydell ``pipe:filename`` 3481e2fcbf42SPeter Maydell name pipe filename 3482e2fcbf42SPeter Maydell 3483e2fcbf42SPeter Maydell ``COMn`` 3484e2fcbf42SPeter Maydell [Windows only] Use host serial port n 3485e2fcbf42SPeter Maydell 3486e2fcbf42SPeter Maydell ``udp:[remote_host]:remote_port[@[src_ip]:src_port]`` 3487e2fcbf42SPeter Maydell This implements UDP Net Console. When remote\_host or src\_ip 3488e2fcbf42SPeter Maydell are not specified they default to ``0.0.0.0``. When not using a 3489e2fcbf42SPeter Maydell specified src\_port a random port is automatically chosen. 3490e2fcbf42SPeter Maydell 3491e2fcbf42SPeter Maydell If you just want a simple readonly console you can use 3492e2fcbf42SPeter Maydell ``netcat`` or ``nc``, by starting QEMU with: 3493e2fcbf42SPeter Maydell ``-serial udp::4555`` and nc as: ``nc -u -l -p 4555``. Any time 3494e2fcbf42SPeter Maydell QEMU writes something to that port it will appear in the 3495e2fcbf42SPeter Maydell netconsole session. 3496e2fcbf42SPeter Maydell 3497e2fcbf42SPeter Maydell If you plan to send characters back via netconsole or you want 3498e2fcbf42SPeter Maydell to stop and start QEMU a lot of times, you should have QEMU use 3499e2fcbf42SPeter Maydell the same source port each time by using something like ``-serial 3500e2fcbf42SPeter Maydell udp::4555@:4556`` to QEMU. Another approach is to use a patched 3501e2fcbf42SPeter Maydell version of netcat which can listen to a TCP port and send and 3502e2fcbf42SPeter Maydell receive characters via udp. If you have a patched version of 3503e2fcbf42SPeter Maydell netcat which activates telnet remote echo and single char 3504e2fcbf42SPeter Maydell transfer, then you can use the following options to set up a 3505e2fcbf42SPeter Maydell netcat redirector to allow telnet on port 5555 to access the 3506e2fcbf42SPeter Maydell QEMU port. 3507e2fcbf42SPeter Maydell 3508e2fcbf42SPeter Maydell ``QEMU Options:`` 3509e2fcbf42SPeter Maydell -serial udp::4555@:4556 3510e2fcbf42SPeter Maydell 3511e2fcbf42SPeter Maydell ``netcat options:`` 3512e2fcbf42SPeter Maydell -u -P 4555 -L 0.0.0.0:4556 -t -p 5555 -I -T 3513e2fcbf42SPeter Maydell 3514e2fcbf42SPeter Maydell ``telnet options:`` 3515e2fcbf42SPeter Maydell localhost 5555 3516e2fcbf42SPeter Maydell 3517e2fcbf42SPeter Maydell ``tcp:[host]:port[,server][,nowait][,nodelay][,reconnect=seconds]`` 3518e2fcbf42SPeter Maydell The TCP Net Console has two modes of operation. It can send the 3519e2fcbf42SPeter Maydell serial I/O to a location or wait for a connection from a 3520e2fcbf42SPeter Maydell location. By default the TCP Net Console is sent to host at the 3521e2fcbf42SPeter Maydell port. If you use the server option QEMU will wait for a client 3522e2fcbf42SPeter Maydell socket application to connect to the port before continuing, 3523e2fcbf42SPeter Maydell unless the ``nowait`` option was specified. The ``nodelay`` 3524e2fcbf42SPeter Maydell option disables the Nagle buffering algorithm. The ``reconnect`` 3525e2fcbf42SPeter Maydell option only applies if noserver is set, if the connection goes 3526e2fcbf42SPeter Maydell down it will attempt to reconnect at the given interval. If host 3527e2fcbf42SPeter Maydell is omitted, 0.0.0.0 is assumed. Only one TCP connection at a 3528e2fcbf42SPeter Maydell time is accepted. You can use ``telnet`` to connect to the 3529e2fcbf42SPeter Maydell corresponding character device. 3530e2fcbf42SPeter Maydell 3531e2fcbf42SPeter Maydell ``Example to send tcp console to 192.168.0.2 port 4444`` 3532e2fcbf42SPeter Maydell -serial tcp:192.168.0.2:4444 3533e2fcbf42SPeter Maydell 3534e2fcbf42SPeter Maydell ``Example to listen and wait on port 4444 for connection`` 3535e2fcbf42SPeter Maydell -serial tcp::4444,server 3536e2fcbf42SPeter Maydell 3537e2fcbf42SPeter Maydell ``Example to not wait and listen on ip 192.168.0.100 port 4444`` 3538e2fcbf42SPeter Maydell -serial tcp:192.168.0.100:4444,server,nowait 3539e2fcbf42SPeter Maydell 3540e2fcbf42SPeter Maydell ``telnet:host:port[,server][,nowait][,nodelay]`` 3541e2fcbf42SPeter Maydell The telnet protocol is used instead of raw tcp sockets. The 3542e2fcbf42SPeter Maydell options work the same as if you had specified ``-serial tcp``. 3543e2fcbf42SPeter Maydell The difference is that the port acts like a telnet server or 3544e2fcbf42SPeter Maydell client using telnet option negotiation. This will also allow you 3545e2fcbf42SPeter Maydell to send the MAGIC\_SYSRQ sequence if you use a telnet that 3546e2fcbf42SPeter Maydell supports sending the break sequence. Typically in unix telnet 3547e2fcbf42SPeter Maydell you do it with Control-] and then type "send break" followed by 3548e2fcbf42SPeter Maydell pressing the enter key. 3549e2fcbf42SPeter Maydell 3550e2fcbf42SPeter Maydell ``websocket:host:port,server[,nowait][,nodelay]`` 3551e2fcbf42SPeter Maydell The WebSocket protocol is used instead of raw tcp socket. The 3552e2fcbf42SPeter Maydell port acts as a WebSocket server. Client mode is not supported. 3553e2fcbf42SPeter Maydell 3554e2fcbf42SPeter Maydell ``unix:path[,server][,nowait][,reconnect=seconds]`` 3555e2fcbf42SPeter Maydell A unix domain socket is used instead of a tcp socket. The option 3556e2fcbf42SPeter Maydell works the same as if you had specified ``-serial tcp`` except 3557e2fcbf42SPeter Maydell the unix domain socket path is used for connections. 3558e2fcbf42SPeter Maydell 3559e2fcbf42SPeter Maydell ``mon:dev_string`` 3560e2fcbf42SPeter Maydell This is a special option to allow the monitor to be multiplexed 3561e2fcbf42SPeter Maydell onto another serial port. The monitor is accessed with key 3562e2fcbf42SPeter Maydell sequence of Control-a and then pressing c. dev\_string should be 3563e2fcbf42SPeter Maydell any one of the serial devices specified above. An example to 3564e2fcbf42SPeter Maydell multiplex the monitor onto a telnet server listening on port 3565e2fcbf42SPeter Maydell 4444 would be: 3566e2fcbf42SPeter Maydell 3567e2fcbf42SPeter Maydell ``-serial mon:telnet::4444,server,nowait`` 3568e2fcbf42SPeter Maydell 3569e2fcbf42SPeter Maydell When the monitor is multiplexed to stdio in this way, Ctrl+C 3570e2fcbf42SPeter Maydell will not terminate QEMU any more but will be passed to the guest 3571e2fcbf42SPeter Maydell instead. 3572e2fcbf42SPeter Maydell 3573e2fcbf42SPeter Maydell ``braille`` 3574e2fcbf42SPeter Maydell Braille device. This will use BrlAPI to display the braille 3575e2fcbf42SPeter Maydell output on a real or fake device. 3576e2fcbf42SPeter Maydell 3577e2fcbf42SPeter Maydell ``msmouse`` 3578e2fcbf42SPeter Maydell Three button serial mouse. Configure the guest to use Microsoft 3579e2fcbf42SPeter Maydell protocol. 3580e2fcbf42SPeter MaydellERST 35815824d651Sblueswir1 35825824d651Sblueswir1DEF("parallel", HAS_ARG, QEMU_OPTION_parallel, \ 3583ad96090aSBlue Swirl "-parallel dev redirect the parallel port to char device 'dev'\n", 3584ad96090aSBlue Swirl QEMU_ARCH_ALL) 3585e2fcbf42SPeter MaydellSRST 3586e2fcbf42SPeter Maydell``-parallel dev`` 3587e2fcbf42SPeter Maydell Redirect the virtual parallel port to host device dev (same devices 3588e2fcbf42SPeter Maydell as the serial port). On Linux hosts, ``/dev/parportN`` can be used 3589e2fcbf42SPeter Maydell to use hardware devices connected on the corresponding host parallel 3590e2fcbf42SPeter Maydell port. 3591e2fcbf42SPeter Maydell 3592e2fcbf42SPeter Maydell This option can be used several times to simulate up to 3 parallel 3593e2fcbf42SPeter Maydell ports. 3594e2fcbf42SPeter Maydell 3595e2fcbf42SPeter Maydell Use ``-parallel none`` to disable all parallel ports. 3596e2fcbf42SPeter MaydellERST 35975824d651Sblueswir1 35985824d651Sblueswir1DEF("monitor", HAS_ARG, QEMU_OPTION_monitor, \ 3599ad96090aSBlue Swirl "-monitor dev redirect the monitor to char device 'dev'\n", 3600ad96090aSBlue Swirl QEMU_ARCH_ALL) 3601e2fcbf42SPeter MaydellSRST 3602e2fcbf42SPeter Maydell``-monitor dev`` 3603e2fcbf42SPeter Maydell Redirect the monitor to host device dev (same devices as the serial 3604e2fcbf42SPeter Maydell port). The default device is ``vc`` in graphical mode and ``stdio`` 3605e2fcbf42SPeter Maydell in non graphical mode. Use ``-monitor none`` to disable the default 3606e2fcbf42SPeter Maydell monitor. 3607e2fcbf42SPeter MaydellERST 36086ca5582dSGerd HoffmannDEF("qmp", HAS_ARG, QEMU_OPTION_qmp, \ 3609ad96090aSBlue Swirl "-qmp dev like -monitor but opens in 'control' mode\n", 3610ad96090aSBlue Swirl QEMU_ARCH_ALL) 3611e2fcbf42SPeter MaydellSRST 3612e2fcbf42SPeter Maydell``-qmp dev`` 3613e2fcbf42SPeter Maydell Like -monitor but opens in 'control' mode. 3614e2fcbf42SPeter MaydellERST 36154821cd4cSMax ReitzDEF("qmp-pretty", HAS_ARG, QEMU_OPTION_qmp_pretty, \ 36164821cd4cSMax Reitz "-qmp-pretty dev like -qmp but uses pretty JSON formatting\n", 36174821cd4cSMax Reitz QEMU_ARCH_ALL) 3618e2fcbf42SPeter MaydellSRST 3619e2fcbf42SPeter Maydell``-qmp-pretty dev`` 3620e2fcbf42SPeter Maydell Like -qmp but uses pretty JSON formatting. 3621e2fcbf42SPeter MaydellERST 36225824d651Sblueswir1 362322a0e04bSGerd HoffmannDEF("mon", HAS_ARG, QEMU_OPTION_mon, \ 3624ef670726SVicente Jimenez Aguilar "-mon [chardev=]name[,mode=readline|control][,pretty[=on|off]]\n", QEMU_ARCH_ALL) 3625e2fcbf42SPeter MaydellSRST 3626e2fcbf42SPeter Maydell``-mon [chardev=]name[,mode=readline|control][,pretty[=on|off]]`` 3627e2fcbf42SPeter Maydell Setup monitor on chardev name. ``pretty`` turns on JSON pretty 3628e2fcbf42SPeter Maydell printing easing human reading and debugging. 3629e2fcbf42SPeter MaydellERST 363022a0e04bSGerd Hoffmann 3631c9f398e5SH. Peter AnvinDEF("debugcon", HAS_ARG, QEMU_OPTION_debugcon, \ 3632ad96090aSBlue Swirl "-debugcon dev redirect the debug console to char device 'dev'\n", 3633ad96090aSBlue Swirl QEMU_ARCH_ALL) 3634e2fcbf42SPeter MaydellSRST 3635e2fcbf42SPeter Maydell``-debugcon dev`` 3636e2fcbf42SPeter Maydell Redirect the debug console to host device dev (same devices as the 3637e2fcbf42SPeter Maydell serial port). The debug console is an I/O port which is typically 3638e2fcbf42SPeter Maydell port 0xe9; writing to that I/O port sends output to this device. The 3639e2fcbf42SPeter Maydell default device is ``vc`` in graphical mode and ``stdio`` in non 3640e2fcbf42SPeter Maydell graphical mode. 3641e2fcbf42SPeter MaydellERST 3642c9f398e5SH. Peter Anvin 36435824d651Sblueswir1DEF("pidfile", HAS_ARG, QEMU_OPTION_pidfile, \ 3644ad96090aSBlue Swirl "-pidfile file write PID to 'file'\n", QEMU_ARCH_ALL) 3645e2fcbf42SPeter MaydellSRST 3646e2fcbf42SPeter Maydell``-pidfile file`` 3647e2fcbf42SPeter Maydell Store the QEMU process PID in file. It is useful if you launch QEMU 3648e2fcbf42SPeter Maydell from a script. 3649e2fcbf42SPeter MaydellERST 36505824d651Sblueswir1 36511b530a6dSaurel32DEF("singlestep", 0, QEMU_OPTION_singlestep, \ 3652ad96090aSBlue Swirl "-singlestep always run in singlestep mode\n", QEMU_ARCH_ALL) 3653e2fcbf42SPeter MaydellSRST 3654e2fcbf42SPeter Maydell``-singlestep`` 3655e2fcbf42SPeter Maydell Run the emulation in single step mode. 3656e2fcbf42SPeter MaydellERST 36571b530a6dSaurel32 3658047f7038SIgor MammedovDEF("preconfig", 0, QEMU_OPTION_preconfig, \ 3659361ac948SMarkus Armbruster "--preconfig pause QEMU before machine is initialized (experimental)\n", 3660047f7038SIgor Mammedov QEMU_ARCH_ALL) 3661e2fcbf42SPeter MaydellSRST 3662e2fcbf42SPeter Maydell``--preconfig`` 3663e2fcbf42SPeter Maydell Pause QEMU for interactive configuration before the machine is 3664e2fcbf42SPeter Maydell created, which allows querying and configuring properties that will 3665e2fcbf42SPeter Maydell affect machine initialization. Use QMP command 'x-exit-preconfig' to 3666e2fcbf42SPeter Maydell exit the preconfig state and move to the next state (i.e. run guest 3667e2fcbf42SPeter Maydell if -S isn't used or pause the second time if -S is used). This 3668e2fcbf42SPeter Maydell option is experimental. 3669e2fcbf42SPeter MaydellERST 3670047f7038SIgor Mammedov 36715824d651Sblueswir1DEF("S", 0, QEMU_OPTION_S, \ 3672ad96090aSBlue Swirl "-S freeze CPU at startup (use 'c' to start execution)\n", 3673ad96090aSBlue Swirl QEMU_ARCH_ALL) 3674e2fcbf42SPeter MaydellSRST 3675e2fcbf42SPeter Maydell``-S`` 3676e2fcbf42SPeter Maydell Do not start CPU at startup (you must type 'c' in the monitor). 3677e2fcbf42SPeter MaydellERST 36785824d651Sblueswir1 3679888a6bc6SSatoru MoriyaDEF("realtime", HAS_ARG, QEMU_OPTION_realtime, 3680888a6bc6SSatoru Moriya "-realtime [mlock=on|off]\n" 3681888a6bc6SSatoru Moriya " run qemu with realtime features\n" 3682888a6bc6SSatoru Moriya " mlock=on|off controls mlock support (default: on)\n", 3683888a6bc6SSatoru Moriya QEMU_ARCH_ALL) 3684e2fcbf42SPeter MaydellSRST 3685e2fcbf42SPeter Maydell``-realtime mlock=on|off`` 3686e2fcbf42SPeter Maydell Run qemu with realtime features. mlocking qemu and guest memory can 3687e2fcbf42SPeter Maydell be enabled via ``mlock=on`` (enabled by default). 3688e2fcbf42SPeter MaydellERST 3689888a6bc6SSatoru Moriya 36906f131f13SMichael S. TsirkinDEF("overcommit", HAS_ARG, QEMU_OPTION_overcommit, 3691dfaa7d50SBALATON Zoltan "-overcommit [mem-lock=on|off][cpu-pm=on|off]\n" 36926f131f13SMichael S. Tsirkin " run qemu with overcommit hints\n" 36936f131f13SMichael S. Tsirkin " mem-lock=on|off controls memory lock support (default: off)\n" 36946f131f13SMichael S. Tsirkin " cpu-pm=on|off controls cpu power management (default: off)\n", 36956f131f13SMichael S. Tsirkin QEMU_ARCH_ALL) 3696e2fcbf42SPeter MaydellSRST 3697e2fcbf42SPeter Maydell``-overcommit mem-lock=on|off`` 369809ce5f2dSPeter Maydell \ 3699e2fcbf42SPeter Maydell``-overcommit cpu-pm=on|off`` 3700e2fcbf42SPeter Maydell Run qemu with hints about host resource overcommit. The default is 3701e2fcbf42SPeter Maydell to assume that host overcommits all resources. 3702e2fcbf42SPeter Maydell 3703e2fcbf42SPeter Maydell Locking qemu and guest memory can be enabled via ``mem-lock=on`` 3704e2fcbf42SPeter Maydell (disabled by default). This works when host memory is not 3705e2fcbf42SPeter Maydell overcommitted and reduces the worst-case latency for guest. This is 3706e2fcbf42SPeter Maydell equivalent to ``realtime``. 3707e2fcbf42SPeter Maydell 3708e2fcbf42SPeter Maydell Guest ability to manage power state of host cpus (increasing latency 3709e2fcbf42SPeter Maydell for other processes on the same host cpu, but decreasing latency for 3710e2fcbf42SPeter Maydell guest) can be enabled via ``cpu-pm=on`` (disabled by default). This 3711e2fcbf42SPeter Maydell works best when host CPU is not overcommitted. When used, host 3712e2fcbf42SPeter Maydell estimates of CPU cycle and power utilization will be incorrect, not 3713e2fcbf42SPeter Maydell taking into account guest idle time. 3714e2fcbf42SPeter MaydellERST 37156f131f13SMichael S. Tsirkin 371659030a8cSaliguoriDEF("gdb", HAS_ARG, QEMU_OPTION_gdb, \ 3717e5910d42SPeter Maydell "-gdb dev accept gdb connection on 'dev'. (QEMU defaults to starting\n" 3718e5910d42SPeter Maydell " the guest without waiting for gdb to connect; use -S too\n" 3719e5910d42SPeter Maydell " if you want it to not start execution.)\n", 3720e5910d42SPeter Maydell QEMU_ARCH_ALL) 3721e2fcbf42SPeter MaydellSRST 3722e2fcbf42SPeter Maydell``-gdb dev`` 3723e5910d42SPeter Maydell Accept a gdb connection on device dev (see 3724e5910d42SPeter Maydell :ref:`gdb_005fusage`). Note that this option does not pause QEMU 3725e5910d42SPeter Maydell execution -- if you want QEMU to not start the guest until you 3726e5910d42SPeter Maydell connect with gdb and issue a ``continue`` command, you will need to 3727e5910d42SPeter Maydell also pass the ``-S`` option to QEMU. 3728e5910d42SPeter Maydell 3729e5910d42SPeter Maydell The most usual configuration is to listen on a local TCP socket:: 3730e5910d42SPeter Maydell 3731e5910d42SPeter Maydell -gdb tcp::3117 3732e5910d42SPeter Maydell 3733e5910d42SPeter Maydell but you can specify other backends; UDP, pseudo TTY, or even stdio 3734e5910d42SPeter Maydell are all reasonable use cases. For example, a stdio connection 3735e5910d42SPeter Maydell allows you to start QEMU from within gdb and establish the 3736e5910d42SPeter Maydell connection via a pipe: 3737e2fcbf42SPeter Maydell 373809ce5f2dSPeter Maydell .. parsed-literal:: 3739e2fcbf42SPeter Maydell 3740e2fcbf42SPeter Maydell (gdb) target remote | exec |qemu_system| -gdb stdio ... 3741e2fcbf42SPeter MaydellERST 37425824d651Sblueswir1 374359030a8cSaliguoriDEF("s", 0, QEMU_OPTION_s, \ 3744ad96090aSBlue Swirl "-s shorthand for -gdb tcp::" DEFAULT_GDBSTUB_PORT "\n", 3745ad96090aSBlue Swirl QEMU_ARCH_ALL) 3746e2fcbf42SPeter MaydellSRST 3747e2fcbf42SPeter Maydell``-s`` 3748e2fcbf42SPeter Maydell Shorthand for -gdb tcp::1234, i.e. open a gdbserver on TCP port 1234 3749e2fcbf42SPeter Maydell (see :ref:`gdb_005fusage`). 3750e2fcbf42SPeter MaydellERST 37515824d651Sblueswir1 37525824d651Sblueswir1DEF("d", HAS_ARG, QEMU_OPTION_d, \ 3753989b697dSPeter Maydell "-d item1,... enable logging of specified items (use '-d help' for a list of log items)\n", 3754ad96090aSBlue Swirl QEMU_ARCH_ALL) 3755e2fcbf42SPeter MaydellSRST 3756e2fcbf42SPeter Maydell``-d item1[,...]`` 3757e2fcbf42SPeter Maydell Enable logging of specified items. Use '-d help' for a list of log 3758e2fcbf42SPeter Maydell items. 3759e2fcbf42SPeter MaydellERST 37605824d651Sblueswir1 3761c235d738SMatthew FernandezDEF("D", HAS_ARG, QEMU_OPTION_D, \ 3762989b697dSPeter Maydell "-D logfile output log to logfile (default stderr)\n", 3763c235d738SMatthew Fernandez QEMU_ARCH_ALL) 3764e2fcbf42SPeter MaydellSRST 3765e2fcbf42SPeter Maydell``-D logfile`` 3766e2fcbf42SPeter Maydell Output log in logfile instead of to stderr 3767e2fcbf42SPeter MaydellERST 3768c235d738SMatthew Fernandez 37693514552eSAlex BennéeDEF("dfilter", HAS_ARG, QEMU_OPTION_DFILTER, \ 37703514552eSAlex Bennée "-dfilter range,.. filter debug output to range of addresses (useful for -d cpu,exec,etc..)\n", 37713514552eSAlex Bennée QEMU_ARCH_ALL) 3772e2fcbf42SPeter MaydellSRST 3773e2fcbf42SPeter Maydell``-dfilter range1[,...]`` 3774e2fcbf42SPeter Maydell Filter debug output to that relevant to a range of target addresses. 3775e2fcbf42SPeter Maydell The filter spec can be either start+size, start-size or start..end 3776e2fcbf42SPeter Maydell where start end and size are the addresses and sizes required. For 3777e2fcbf42SPeter Maydell example: 3778e2fcbf42SPeter Maydell 3779e2fcbf42SPeter Maydell :: 3780e2fcbf42SPeter Maydell 3781e2fcbf42SPeter Maydell -dfilter 0x8000..0x8fff,0xffffffc000080000+0x200,0xffffffc000060000-0x1000 3782e2fcbf42SPeter Maydell 3783e2fcbf42SPeter Maydell Will dump output for any code in the 0x1000 sized block starting at 3784e2fcbf42SPeter Maydell 0x8000 and the 0x200 sized block starting at 0xffffffc000080000 and 3785e2fcbf42SPeter Maydell another 0x1000 sized block starting at 0xffffffc00005f000. 3786e2fcbf42SPeter MaydellERST 37873514552eSAlex Bennée 37889c09a251SRichard HendersonDEF("seed", HAS_ARG, QEMU_OPTION_seed, \ 37899c09a251SRichard Henderson "-seed number seed the pseudo-random number generator\n", 37909c09a251SRichard Henderson QEMU_ARCH_ALL) 3791e2fcbf42SPeter MaydellSRST 3792e2fcbf42SPeter Maydell``-seed number`` 3793e2fcbf42SPeter Maydell Force the guest to use a deterministic pseudo-random number 3794e2fcbf42SPeter Maydell generator, seeded with number. This does not affect crypto routines 3795e2fcbf42SPeter Maydell within the host. 3796e2fcbf42SPeter MaydellERST 37979c09a251SRichard Henderson 37985824d651Sblueswir1DEF("L", HAS_ARG, QEMU_OPTION_L, \ 3799ad96090aSBlue Swirl "-L path set the directory for the BIOS, VGA BIOS and keymaps\n", 3800ad96090aSBlue Swirl QEMU_ARCH_ALL) 3801e2fcbf42SPeter MaydellSRST 3802e2fcbf42SPeter Maydell``-L path`` 3803e2fcbf42SPeter Maydell Set the directory for the BIOS, VGA BIOS and keymaps. 3804e2fcbf42SPeter Maydell 3805e2fcbf42SPeter Maydell To list all the data directories, use ``-L help``. 3806e2fcbf42SPeter MaydellERST 38075824d651Sblueswir1 38085824d651Sblueswir1DEF("bios", HAS_ARG, QEMU_OPTION_bios, \ 3809ad96090aSBlue Swirl "-bios file set the filename for the BIOS\n", QEMU_ARCH_ALL) 3810e2fcbf42SPeter MaydellSRST 3811e2fcbf42SPeter Maydell``-bios file`` 3812e2fcbf42SPeter Maydell Set the filename for the BIOS. 3813e2fcbf42SPeter MaydellERST 38145824d651Sblueswir1 38155824d651Sblueswir1DEF("enable-kvm", 0, QEMU_OPTION_enable_kvm, \ 3816ad96090aSBlue Swirl "-enable-kvm enable KVM full virtualization support\n", QEMU_ARCH_ALL) 3817e2fcbf42SPeter MaydellSRST 3818e2fcbf42SPeter Maydell``-enable-kvm`` 3819e2fcbf42SPeter Maydell Enable KVM full virtualization support. This option is only 3820e2fcbf42SPeter Maydell available if KVM support is enabled when compiling. 3821e2fcbf42SPeter MaydellERST 38225824d651Sblueswir1 3823e37630caSaliguoriDEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid, 3824ad96090aSBlue Swirl "-xen-domid id specify xen guest domain id\n", QEMU_ARCH_ALL) 3825e37630caSaliguoriDEF("xen-attach", 0, QEMU_OPTION_xen_attach, 3826e37630caSaliguori "-xen-attach attach to existing xen domain\n" 38271077bcacSAnthony PERARD " libxl will use this when starting QEMU\n", 3828ad96090aSBlue Swirl QEMU_ARCH_ALL) 38291c599472SPaul DurrantDEF("xen-domid-restrict", 0, QEMU_OPTION_xen_domid_restrict, 38301c599472SPaul Durrant "-xen-domid-restrict restrict set of available xen operations\n" 38311c599472SPaul Durrant " to specified domain id. (Does not affect\n" 38321c599472SPaul Durrant " xenpv machine type).\n", 38331c599472SPaul Durrant QEMU_ARCH_ALL) 3834e2fcbf42SPeter MaydellSRST 3835e2fcbf42SPeter Maydell``-xen-domid id`` 3836e2fcbf42SPeter Maydell Specify xen guest domain id (XEN only). 3837e2fcbf42SPeter Maydell 3838e2fcbf42SPeter Maydell``-xen-attach`` 3839e2fcbf42SPeter Maydell Attach to existing xen domain. libxl will use this when starting 3840e2fcbf42SPeter Maydell QEMU (XEN only). Restrict set of available xen operations to 3841e2fcbf42SPeter Maydell specified domain id (XEN only). 3842e2fcbf42SPeter MaydellERST 3843e37630caSaliguori 38445824d651Sblueswir1DEF("no-reboot", 0, QEMU_OPTION_no_reboot, \ 3845ad96090aSBlue Swirl "-no-reboot exit instead of rebooting\n", QEMU_ARCH_ALL) 3846e2fcbf42SPeter MaydellSRST 3847e2fcbf42SPeter Maydell``-no-reboot`` 3848e2fcbf42SPeter Maydell Exit instead of rebooting. 3849e2fcbf42SPeter MaydellERST 38505824d651Sblueswir1 38515824d651Sblueswir1DEF("no-shutdown", 0, QEMU_OPTION_no_shutdown, \ 3852ad96090aSBlue Swirl "-no-shutdown stop before shutdown\n", QEMU_ARCH_ALL) 3853e2fcbf42SPeter MaydellSRST 3854e2fcbf42SPeter Maydell``-no-shutdown`` 3855e2fcbf42SPeter Maydell Don't exit QEMU on guest shutdown, but instead only stop the 3856e2fcbf42SPeter Maydell emulation. This allows for instance switching to monitor to commit 3857e2fcbf42SPeter Maydell changes to the disk image. 3858e2fcbf42SPeter MaydellERST 38595824d651Sblueswir1 38605824d651Sblueswir1DEF("loadvm", HAS_ARG, QEMU_OPTION_loadvm, \ 38615824d651Sblueswir1 "-loadvm [tag|id]\n" \ 3862ad96090aSBlue Swirl " start right away with a saved state (loadvm in monitor)\n", 3863ad96090aSBlue Swirl QEMU_ARCH_ALL) 3864e2fcbf42SPeter MaydellSRST 3865e2fcbf42SPeter Maydell``-loadvm file`` 3866e2fcbf42SPeter Maydell Start right away with a saved state (``loadvm`` in monitor) 3867e2fcbf42SPeter MaydellERST 38685824d651Sblueswir1 38695824d651Sblueswir1#ifndef _WIN32 38705824d651Sblueswir1DEF("daemonize", 0, QEMU_OPTION_daemonize, \ 3871ad96090aSBlue Swirl "-daemonize daemonize QEMU after initializing\n", QEMU_ARCH_ALL) 38725824d651Sblueswir1#endif 3873e2fcbf42SPeter MaydellSRST 3874e2fcbf42SPeter Maydell``-daemonize`` 3875e2fcbf42SPeter Maydell Daemonize the QEMU process after initialization. QEMU will not 3876e2fcbf42SPeter Maydell detach from standard IO until it is ready to receive connections on 3877e2fcbf42SPeter Maydell any of its devices. This option is a useful way for external 3878e2fcbf42SPeter Maydell programs to launch QEMU without having to cope with initialization 3879e2fcbf42SPeter Maydell race conditions. 3880e2fcbf42SPeter MaydellERST 38815824d651Sblueswir1 38825824d651Sblueswir1DEF("option-rom", HAS_ARG, QEMU_OPTION_option_rom, \ 3883ad96090aSBlue Swirl "-option-rom rom load a file, rom, into the option ROM space\n", 3884ad96090aSBlue Swirl QEMU_ARCH_ALL) 3885e2fcbf42SPeter MaydellSRST 3886e2fcbf42SPeter Maydell``-option-rom file`` 3887e2fcbf42SPeter Maydell Load the contents of file as an option ROM. This option is useful to 3888e2fcbf42SPeter Maydell load things like EtherBoot. 3889e2fcbf42SPeter MaydellERST 38905824d651Sblueswir1 38911ed2fc1fSJan KiszkaDEF("rtc", HAS_ARG, QEMU_OPTION_rtc, \ 3892238d1240SArtem Pisarenko "-rtc [base=utc|localtime|<datetime>][,clock=host|rt|vm][,driftfix=none|slew]\n" \ 3893ad96090aSBlue Swirl " set the RTC base and clock, enable drift fix for clock ticks (x86 only)\n", 3894ad96090aSBlue Swirl QEMU_ARCH_ALL) 38951ed2fc1fSJan Kiszka 3896e2fcbf42SPeter MaydellSRST 3897e2fcbf42SPeter Maydell``-rtc [base=utc|localtime|datetime][,clock=host|rt|vm][,driftfix=none|slew]`` 3898e2fcbf42SPeter Maydell Specify ``base`` as ``utc`` or ``localtime`` to let the RTC start at 3899e2fcbf42SPeter Maydell the current UTC or local time, respectively. ``localtime`` is 3900e2fcbf42SPeter Maydell required for correct date in MS-DOS or Windows. To start at a 3901e2fcbf42SPeter Maydell specific point in time, provide datetime in the format 3902e2fcbf42SPeter Maydell ``2006-06-17T16:01:21`` or ``2006-06-17``. The default base is UTC. 3903e2fcbf42SPeter Maydell 3904e2fcbf42SPeter Maydell By default the RTC is driven by the host system time. This allows 3905e2fcbf42SPeter Maydell using of the RTC as accurate reference clock inside the guest, 3906e2fcbf42SPeter Maydell specifically if the host time is smoothly following an accurate 3907e2fcbf42SPeter Maydell external reference clock, e.g. via NTP. If you want to isolate the 3908e2fcbf42SPeter Maydell guest time from the host, you can set ``clock`` to ``rt`` instead, 3909e2fcbf42SPeter Maydell which provides a host monotonic clock if host support it. To even 3910e2fcbf42SPeter Maydell prevent the RTC from progressing during suspension, you can set 3911e2fcbf42SPeter Maydell ``clock`` to ``vm`` (virtual clock). '\ ``clock=vm``\ ' is 3912e2fcbf42SPeter Maydell recommended especially in icount mode in order to preserve 3913e2fcbf42SPeter Maydell determinism; however, note that in icount mode the speed of the 3914e2fcbf42SPeter Maydell virtual clock is variable and can in general differ from the host 3915e2fcbf42SPeter Maydell clock. 3916e2fcbf42SPeter Maydell 3917e2fcbf42SPeter Maydell Enable ``driftfix`` (i386 targets only) if you experience time drift 3918e2fcbf42SPeter Maydell problems, specifically with Windows' ACPI HAL. This option will try 3919e2fcbf42SPeter Maydell to figure out how many timer interrupts were not processed by the 3920e2fcbf42SPeter Maydell Windows guest and will re-inject them. 3921e2fcbf42SPeter MaydellERST 39225824d651Sblueswir1 39235824d651Sblueswir1DEF("icount", HAS_ARG, QEMU_OPTION_icount, \ 39249c2037d0SPavel Dovgalyuk "-icount [shift=N|auto][,align=on|off][,sleep=on|off,rr=record|replay,rrfile=<filename>,rrsnapshot=<snapshot>]\n" \ 3925bc14ca24Saliguori " enable virtual instruction counter with 2^N clock ticks per\n" \ 3926f1f4b57eSVictor CLEMENT " instruction, enable aligning the host and virtual clocks\n" \ 3927f1f4b57eSVictor CLEMENT " or disable real time cpu sleeping\n", QEMU_ARCH_ALL) 3928e2fcbf42SPeter MaydellSRST 3929e2fcbf42SPeter Maydell``-icount [shift=N|auto][,rr=record|replay,rrfile=filename,rrsnapshot=snapshot]`` 3930e2fcbf42SPeter Maydell Enable virtual instruction counter. The virtual cpu will execute one 3931e2fcbf42SPeter Maydell instruction every 2^N ns of virtual time. If ``auto`` is specified 3932e2fcbf42SPeter Maydell then the virtual cpu speed will be automatically adjusted to keep 3933e2fcbf42SPeter Maydell virtual time within a few seconds of real time. 3934e2fcbf42SPeter Maydell 3935e2fcbf42SPeter Maydell When the virtual cpu is sleeping, the virtual time will advance at 3936e2fcbf42SPeter Maydell default speed unless ``sleep=on|off`` is specified. With 3937e2fcbf42SPeter Maydell ``sleep=on|off``, the virtual time will jump to the next timer 3938e2fcbf42SPeter Maydell deadline instantly whenever the virtual cpu goes to sleep mode and 3939e2fcbf42SPeter Maydell will not advance if no timer is enabled. This behavior give 3940e2fcbf42SPeter Maydell deterministic execution times from the guest point of view. 3941e2fcbf42SPeter Maydell 3942e2fcbf42SPeter Maydell Note that while this option can give deterministic behavior, it does 3943e2fcbf42SPeter Maydell not provide cycle accurate emulation. Modern CPUs contain 3944e2fcbf42SPeter Maydell superscalar out of order cores with complex cache hierarchies. The 3945e2fcbf42SPeter Maydell number of instructions executed often has little or no correlation 3946e2fcbf42SPeter Maydell with actual performance. 3947e2fcbf42SPeter Maydell 3948e2fcbf42SPeter Maydell ``align=on`` will activate the delay algorithm which will try to 3949e2fcbf42SPeter Maydell synchronise the host clock and the virtual clock. The goal is to 3950e2fcbf42SPeter Maydell have a guest running at the real frequency imposed by the shift 3951e2fcbf42SPeter Maydell option. Whenever the guest clock is behind the host clock and if 3952e2fcbf42SPeter Maydell ``align=on`` is specified then we print a message to the user to 3953e2fcbf42SPeter Maydell inform about the delay. Currently this option does not work when 3954e2fcbf42SPeter Maydell ``shift`` is ``auto``. Note: The sync algorithm will work for those 3955e2fcbf42SPeter Maydell shift values for which the guest clock runs ahead of the host clock. 3956e2fcbf42SPeter Maydell Typically this happens when the shift value is high (how high 3957e2fcbf42SPeter Maydell depends on the host machine). 3958e2fcbf42SPeter Maydell 3959e2fcbf42SPeter Maydell When ``rr`` option is specified deterministic record/replay is 3960e2fcbf42SPeter Maydell enabled. Replay log is written into filename file in record mode and 3961e2fcbf42SPeter Maydell read from this file in replay mode. 3962e2fcbf42SPeter Maydell 3963e2fcbf42SPeter Maydell Option rrsnapshot is used to create new vm snapshot named snapshot 3964e2fcbf42SPeter Maydell at the start of execution recording. In replay mode this option is 3965e2fcbf42SPeter Maydell used to load the initial VM state. 3966e2fcbf42SPeter MaydellERST 39675824d651Sblueswir1 39689dd986ccSRichard W.M. JonesDEF("watchdog", HAS_ARG, QEMU_OPTION_watchdog, \ 3969d7933ef3SXu Wang "-watchdog model\n" \ 3970ad96090aSBlue Swirl " enable virtual hardware watchdog [default=none]\n", 3971ad96090aSBlue Swirl QEMU_ARCH_ALL) 3972e2fcbf42SPeter MaydellSRST 3973e2fcbf42SPeter Maydell``-watchdog model`` 3974e2fcbf42SPeter Maydell Create a virtual hardware watchdog device. Once enabled (by a guest 3975e2fcbf42SPeter Maydell action), the watchdog must be periodically polled by an agent inside 3976e2fcbf42SPeter Maydell the guest or else the guest will be restarted. Choose a model for 3977e2fcbf42SPeter Maydell which your guest has drivers. 3978e2fcbf42SPeter Maydell 3979e2fcbf42SPeter Maydell The model is the model of hardware watchdog to emulate. Use 3980e2fcbf42SPeter Maydell ``-watchdog help`` to list available hardware models. Only one 3981e2fcbf42SPeter Maydell watchdog can be enabled for a guest. 3982e2fcbf42SPeter Maydell 3983e2fcbf42SPeter Maydell The following models may be available: 3984e2fcbf42SPeter Maydell 3985e2fcbf42SPeter Maydell ``ib700`` 3986e2fcbf42SPeter Maydell iBASE 700 is a very simple ISA watchdog with a single timer. 3987e2fcbf42SPeter Maydell 3988e2fcbf42SPeter Maydell ``i6300esb`` 3989e2fcbf42SPeter Maydell Intel 6300ESB I/O controller hub is a much more featureful 3990e2fcbf42SPeter Maydell PCI-based dual-timer watchdog. 3991e2fcbf42SPeter Maydell 3992e2fcbf42SPeter Maydell ``diag288`` 3993e2fcbf42SPeter Maydell A virtual watchdog for s390x backed by the diagnose 288 3994e2fcbf42SPeter Maydell hypercall (currently KVM only). 3995e2fcbf42SPeter MaydellERST 39969dd986ccSRichard W.M. Jones 39979dd986ccSRichard W.M. JonesDEF("watchdog-action", HAS_ARG, QEMU_OPTION_watchdog_action, \ 39987ad9270eSMarkus Armbruster "-watchdog-action reset|shutdown|poweroff|inject-nmi|pause|debug|none\n" \ 3999ad96090aSBlue Swirl " action when watchdog fires [default=reset]\n", 4000ad96090aSBlue Swirl QEMU_ARCH_ALL) 4001e2fcbf42SPeter MaydellSRST 4002e2fcbf42SPeter Maydell``-watchdog-action action`` 4003e2fcbf42SPeter Maydell The action controls what QEMU will do when the watchdog timer 4004e2fcbf42SPeter Maydell expires. The default is ``reset`` (forcefully reset the guest). 4005e2fcbf42SPeter Maydell Other possible actions are: ``shutdown`` (attempt to gracefully 4006e2fcbf42SPeter Maydell shutdown the guest), ``poweroff`` (forcefully poweroff the guest), 4007e2fcbf42SPeter Maydell ``inject-nmi`` (inject a NMI into the guest), ``pause`` (pause the 4008e2fcbf42SPeter Maydell guest), ``debug`` (print a debug message and continue), or ``none`` 4009e2fcbf42SPeter Maydell (do nothing). 4010e2fcbf42SPeter Maydell 4011e2fcbf42SPeter Maydell Note that the ``shutdown`` action requires that the guest responds 4012e2fcbf42SPeter Maydell to ACPI signals, which it may not be able to do in the sort of 4013e2fcbf42SPeter Maydell situations where the watchdog would have expired, and thus 4014e2fcbf42SPeter Maydell ``-watchdog-action shutdown`` is not recommended for production use. 4015e2fcbf42SPeter Maydell 4016e2fcbf42SPeter Maydell Examples: 4017e2fcbf42SPeter Maydell 4018e2fcbf42SPeter Maydell ``-watchdog i6300esb -watchdog-action pause``; \ ``-watchdog ib700`` 4019e2fcbf42SPeter Maydell 4020e2fcbf42SPeter MaydellERST 40219dd986ccSRichard W.M. Jones 40225824d651Sblueswir1DEF("echr", HAS_ARG, QEMU_OPTION_echr, \ 4023ad96090aSBlue Swirl "-echr chr set terminal escape character instead of ctrl-a\n", 4024ad96090aSBlue Swirl QEMU_ARCH_ALL) 4025e2fcbf42SPeter MaydellSRST 4026e2fcbf42SPeter Maydell``-echr numeric_ascii_value`` 4027e2fcbf42SPeter Maydell Change the escape character used for switching to the monitor when 4028e2fcbf42SPeter Maydell using monitor and serial sharing. The default is ``0x01`` when using 4029e2fcbf42SPeter Maydell the ``-nographic`` option. ``0x01`` is equal to pressing 4030e2fcbf42SPeter Maydell ``Control-a``. You can select a different character from the ascii 4031e2fcbf42SPeter Maydell control keys where 1 through 26 map to Control-a through Control-z. 4032e2fcbf42SPeter Maydell For instance you could use the either of the following to change the 4033e2fcbf42SPeter Maydell escape character to Control-t. 4034e2fcbf42SPeter Maydell 4035e2fcbf42SPeter Maydell ``-echr 0x14``; \ ``-echr 20`` 4036e2fcbf42SPeter Maydell 4037e2fcbf42SPeter MaydellERST 40385824d651Sblueswir1 40395824d651Sblueswir1DEF("show-cursor", 0, QEMU_OPTION_show_cursor, \ 4040ad96090aSBlue Swirl "-show-cursor show cursor\n", QEMU_ARCH_ALL) 4041e2fcbf42SPeter MaydellSRST 4042e2fcbf42SPeter Maydell``-show-cursor`` 4043e2fcbf42SPeter Maydell Show cursor. 4044e2fcbf42SPeter MaydellERST 40455824d651Sblueswir1 40465824d651Sblueswir1DEF("tb-size", HAS_ARG, QEMU_OPTION_tb_size, \ 4047ad96090aSBlue Swirl "-tb-size n set TB size\n", QEMU_ARCH_ALL) 4048e2fcbf42SPeter MaydellSRST 4049e2fcbf42SPeter Maydell``-tb-size n`` 4050e2fcbf42SPeter Maydell Set TCG translation block cache size. Deprecated, use 4051e2fcbf42SPeter Maydell '\ ``-accel tcg,tb-size=n``\ ' instead. 4052e2fcbf42SPeter MaydellERST 40535824d651Sblueswir1 40545824d651Sblueswir1DEF("incoming", HAS_ARG, QEMU_OPTION_incoming, \ 40557c601803SMichael Tokarev "-incoming tcp:[host]:port[,to=maxport][,ipv4][,ipv6]\n" \ 40567c601803SMichael Tokarev "-incoming rdma:host:port[,ipv4][,ipv6]\n" \ 40577c601803SMichael Tokarev "-incoming unix:socketpath\n" \ 40587c601803SMichael Tokarev " prepare for incoming migration, listen on\n" \ 40597c601803SMichael Tokarev " specified protocol and socket address\n" \ 40607c601803SMichael Tokarev "-incoming fd:fd\n" \ 40617c601803SMichael Tokarev "-incoming exec:cmdline\n" \ 40627c601803SMichael Tokarev " accept incoming migration on given file descriptor\n" \ 40631597051bSDr. David Alan Gilbert " or from given external command\n" \ 40641597051bSDr. David Alan Gilbert "-incoming defer\n" \ 40651597051bSDr. David Alan Gilbert " wait for the URI to be specified via migrate_incoming\n", 4066ad96090aSBlue Swirl QEMU_ARCH_ALL) 4067e2fcbf42SPeter MaydellSRST 406809ce5f2dSPeter Maydell``-incoming tcp:[host]:port[,to=maxport][,ipv4][,ipv6]`` 406909ce5f2dSPeter Maydell \ 407009ce5f2dSPeter Maydell``-incoming rdma:host:port[,ipv4][,ipv6]`` 4071e2fcbf42SPeter Maydell Prepare for incoming migration, listen on a given tcp port. 4072e2fcbf42SPeter Maydell 4073e2fcbf42SPeter Maydell``-incoming unix:socketpath`` 4074e2fcbf42SPeter Maydell Prepare for incoming migration, listen on a given unix socket. 4075e2fcbf42SPeter Maydell 4076e2fcbf42SPeter Maydell``-incoming fd:fd`` 4077e2fcbf42SPeter Maydell Accept incoming migration from a given filedescriptor. 4078e2fcbf42SPeter Maydell 4079e2fcbf42SPeter Maydell``-incoming exec:cmdline`` 4080e2fcbf42SPeter Maydell Accept incoming migration as an output from specified external 4081e2fcbf42SPeter Maydell command. 4082e2fcbf42SPeter Maydell 4083e2fcbf42SPeter Maydell``-incoming defer`` 4084e2fcbf42SPeter Maydell Wait for the URI to be specified via migrate\_incoming. The monitor 4085e2fcbf42SPeter Maydell can be used to change settings (such as migration parameters) prior 4086e2fcbf42SPeter Maydell to issuing the migrate\_incoming to allow the migration to begin. 4087e2fcbf42SPeter MaydellERST 40885824d651Sblueswir1 4089d15c05fcSAshijeet AcharyaDEF("only-migratable", 0, QEMU_OPTION_only_migratable, \ 4090d15c05fcSAshijeet Acharya "-only-migratable allow only migratable devices\n", QEMU_ARCH_ALL) 4091e2fcbf42SPeter MaydellSRST 4092e2fcbf42SPeter Maydell``-only-migratable`` 4093e2fcbf42SPeter Maydell Only allow migratable devices. Devices will not be allowed to enter 4094e2fcbf42SPeter Maydell an unmigratable state. 4095e2fcbf42SPeter MaydellERST 4096d15c05fcSAshijeet Acharya 4097d8c208ddSGerd HoffmannDEF("nodefaults", 0, QEMU_OPTION_nodefaults, \ 4098ad96090aSBlue Swirl "-nodefaults don't create default devices\n", QEMU_ARCH_ALL) 4099e2fcbf42SPeter MaydellSRST 4100e2fcbf42SPeter Maydell``-nodefaults`` 4101e2fcbf42SPeter Maydell Don't create default devices. Normally, QEMU sets the default 4102e2fcbf42SPeter Maydell devices like serial port, parallel port, virtual console, monitor 4103e2fcbf42SPeter Maydell device, VGA adapter, floppy and CD-ROM drive and others. The 4104e2fcbf42SPeter Maydell ``-nodefaults`` option will disable all those default devices. 4105e2fcbf42SPeter MaydellERST 4106d8c208ddSGerd Hoffmann 41075824d651Sblueswir1#ifndef _WIN32 41085824d651Sblueswir1DEF("chroot", HAS_ARG, QEMU_OPTION_chroot, \ 4109ad96090aSBlue Swirl "-chroot dir chroot to dir just before starting the VM\n", 4110ad96090aSBlue Swirl QEMU_ARCH_ALL) 41115824d651Sblueswir1#endif 4112e2fcbf42SPeter MaydellSRST 4113e2fcbf42SPeter Maydell``-chroot dir`` 4114e2fcbf42SPeter Maydell Immediately before starting guest execution, chroot to the specified 4115e2fcbf42SPeter Maydell directory. Especially useful in combination with -runas. 4116e2fcbf42SPeter MaydellERST 41175824d651Sblueswir1 41185824d651Sblueswir1#ifndef _WIN32 41195824d651Sblueswir1DEF("runas", HAS_ARG, QEMU_OPTION_runas, \ 41202c42f1e8SIan Jackson "-runas user change to user id user just before starting the VM\n" \ 41212c42f1e8SIan Jackson " user can be numeric uid:gid instead\n", 4122ad96090aSBlue Swirl QEMU_ARCH_ALL) 41235824d651Sblueswir1#endif 4124e2fcbf42SPeter MaydellSRST 4125e2fcbf42SPeter Maydell``-runas user`` 4126e2fcbf42SPeter Maydell Immediately before starting guest execution, drop root privileges, 4127e2fcbf42SPeter Maydell switching to the specified user. 4128e2fcbf42SPeter MaydellERST 41295824d651Sblueswir1 41305824d651Sblueswir1DEF("prom-env", HAS_ARG, QEMU_OPTION_prom_env, 41315824d651Sblueswir1 "-prom-env variable=value\n" 4132ad96090aSBlue Swirl " set OpenBIOS nvram variables\n", 4133ad96090aSBlue Swirl QEMU_ARCH_PPC | QEMU_ARCH_SPARC) 4134e2fcbf42SPeter MaydellSRST 4135e2fcbf42SPeter Maydell``-prom-env variable=value`` 4136e2fcbf42SPeter Maydell Set OpenBIOS nvram variable to given value (PPC, SPARC only). 4137e2fcbf42SPeter Maydell 4138e2fcbf42SPeter Maydell :: 4139e2fcbf42SPeter Maydell 4140e2fcbf42SPeter Maydell qemu-system-sparc -prom-env 'auto-boot?=false' \ 4141e2fcbf42SPeter Maydell -prom-env 'boot-device=sd(0,2,0):d' -prom-env 'boot-args=linux single' 4142e2fcbf42SPeter Maydell 4143e2fcbf42SPeter Maydell :: 4144e2fcbf42SPeter Maydell 4145e2fcbf42SPeter Maydell qemu-system-ppc -prom-env 'auto-boot?=false' \ 4146e2fcbf42SPeter Maydell -prom-env 'boot-device=hd:2,\yaboot' \ 4147e2fcbf42SPeter Maydell -prom-env 'boot-args=conf=hd:2,\yaboot.conf' 4148e2fcbf42SPeter MaydellERST 41495824d651Sblueswir1DEF("semihosting", 0, QEMU_OPTION_semihosting, 4150f7bbcfb5SMichael Walle "-semihosting semihosting mode\n", 41513b3c1694SLeon Alrae QEMU_ARCH_ARM | QEMU_ARCH_M68K | QEMU_ARCH_XTENSA | QEMU_ARCH_LM32 | 4152413a99a9SSandra Loosemore QEMU_ARCH_MIPS | QEMU_ARCH_NIOS2) 4153e2fcbf42SPeter MaydellSRST 4154e2fcbf42SPeter Maydell``-semihosting`` 4155e2fcbf42SPeter Maydell Enable semihosting mode (ARM, M68K, Xtensa, MIPS, Nios II only). 4156e2fcbf42SPeter Maydell 4157e2fcbf42SPeter Maydell Note that this allows guest direct access to the host filesystem, so 4158e2fcbf42SPeter Maydell should only be used with a trusted guest OS. 4159e2fcbf42SPeter Maydell 4160e2fcbf42SPeter Maydell See the -semihosting-config option documentation for further 4161e2fcbf42SPeter Maydell information about the facilities this enables. 4162e2fcbf42SPeter MaydellERST 4163a38bb079SLiviu IonescuDEF("semihosting-config", HAS_ARG, QEMU_OPTION_semihosting_config, 41644e7f9032SAlex Bennée "-semihosting-config [enable=on|off][,target=native|gdb|auto][,chardev=id][,arg=str[,...]]\n" \ 4165a59d31a1SLeon Alrae " semihosting configuration\n", 41663b3c1694SLeon AlraeQEMU_ARCH_ARM | QEMU_ARCH_M68K | QEMU_ARCH_XTENSA | QEMU_ARCH_LM32 | 4167413a99a9SSandra LoosemoreQEMU_ARCH_MIPS | QEMU_ARCH_NIOS2) 4168e2fcbf42SPeter MaydellSRST 4169e2fcbf42SPeter Maydell``-semihosting-config [enable=on|off][,target=native|gdb|auto][,chardev=id][,arg=str[,...]]`` 4170e2fcbf42SPeter Maydell Enable and configure semihosting (ARM, M68K, Xtensa, MIPS, Nios II 4171e2fcbf42SPeter Maydell only). 4172e2fcbf42SPeter Maydell 4173e2fcbf42SPeter Maydell Note that this allows guest direct access to the host filesystem, so 4174e2fcbf42SPeter Maydell should only be used with a trusted guest OS. 4175e2fcbf42SPeter Maydell 4176e2fcbf42SPeter Maydell On Arm this implements the standard semihosting API, version 2.0. 4177e2fcbf42SPeter Maydell 4178e2fcbf42SPeter Maydell On M68K this implements the "ColdFire GDB" interface used by 4179e2fcbf42SPeter Maydell libgloss. 4180e2fcbf42SPeter Maydell 4181e2fcbf42SPeter Maydell Xtensa semihosting provides basic file IO calls, such as 4182e2fcbf42SPeter Maydell open/read/write/seek/select. Tensilica baremetal libc for ISS and 4183e2fcbf42SPeter Maydell linux platform "sim" use this interface. 4184e2fcbf42SPeter Maydell 4185e2fcbf42SPeter Maydell ``target=native|gdb|auto`` 4186e2fcbf42SPeter Maydell Defines where the semihosting calls will be addressed, to QEMU 4187e2fcbf42SPeter Maydell (``native``) or to GDB (``gdb``). The default is ``auto``, which 4188e2fcbf42SPeter Maydell means ``gdb`` during debug sessions and ``native`` otherwise. 4189e2fcbf42SPeter Maydell 4190e2fcbf42SPeter Maydell ``chardev=str1`` 4191e2fcbf42SPeter Maydell Send the output to a chardev backend output for native or auto 4192e2fcbf42SPeter Maydell output when not in gdb 4193e2fcbf42SPeter Maydell 4194e2fcbf42SPeter Maydell ``arg=str1,arg=str2,...`` 4195e2fcbf42SPeter Maydell Allows the user to pass input arguments, and can be used 4196e2fcbf42SPeter Maydell multiple times to build up a list. The old-style 4197e2fcbf42SPeter Maydell ``-kernel``/``-append`` method of passing a command line is 4198e2fcbf42SPeter Maydell still supported for backward compatibility. If both the 4199e2fcbf42SPeter Maydell ``--semihosting-config arg`` and the ``-kernel``/``-append`` are 4200e2fcbf42SPeter Maydell specified, the former is passed to semihosting as it always 4201e2fcbf42SPeter Maydell takes precedence. 4202e2fcbf42SPeter MaydellERST 42035824d651Sblueswir1DEF("old-param", 0, QEMU_OPTION_old_param, 4204ad96090aSBlue Swirl "-old-param old param mode\n", QEMU_ARCH_ARM) 4205e2fcbf42SPeter MaydellSRST 4206e2fcbf42SPeter Maydell``-old-param`` 4207e2fcbf42SPeter Maydell Old param mode (ARM only). 4208e2fcbf42SPeter MaydellERST 420995d5f08bSStefan Weil 42107d76ad4fSEduardo OtuboDEF("sandbox", HAS_ARG, QEMU_OPTION_sandbox, \ 421173a1e647SEduardo Otubo "-sandbox on[,obsolete=allow|deny][,elevateprivileges=allow|deny|children]\n" \ 421224f8cdc5SEduardo Otubo " [,spawn=allow|deny][,resourcecontrol=allow|deny]\n" \ 42132b716fa6SEduardo Otubo " Enable seccomp mode 2 system call filter (default 'off').\n" \ 42142b716fa6SEduardo Otubo " use 'obsolete' to allow obsolete system calls that are provided\n" \ 42152b716fa6SEduardo Otubo " by the kernel, but typically no longer used by modern\n" \ 421673a1e647SEduardo Otubo " C library implementations.\n" \ 421773a1e647SEduardo Otubo " use 'elevateprivileges' to allow or deny QEMU process to elevate\n" \ 421873a1e647SEduardo Otubo " its privileges by blacklisting all set*uid|gid system calls.\n" \ 421973a1e647SEduardo Otubo " The value 'children' will deny set*uid|gid system calls for\n" \ 4220995a226fSEduardo Otubo " main QEMU process but will allow forks and execves to run unprivileged\n" \ 4221995a226fSEduardo Otubo " use 'spawn' to avoid QEMU to spawn new threads or processes by\n" \ 422224f8cdc5SEduardo Otubo " blacklisting *fork and execve\n" \ 422324f8cdc5SEduardo Otubo " use 'resourcecontrol' to disable process affinity and schedular priority\n", 42247d76ad4fSEduardo Otubo QEMU_ARCH_ALL) 4225e2fcbf42SPeter MaydellSRST 4226e2fcbf42SPeter Maydell``-sandbox arg[,obsolete=string][,elevateprivileges=string][,spawn=string][,resourcecontrol=string]`` 4227e2fcbf42SPeter Maydell Enable Seccomp mode 2 system call filter. 'on' will enable syscall 4228e2fcbf42SPeter Maydell filtering and 'off' will disable it. The default is 'off'. 4229e2fcbf42SPeter Maydell 4230e2fcbf42SPeter Maydell ``obsolete=string`` 4231e2fcbf42SPeter Maydell Enable Obsolete system calls 4232e2fcbf42SPeter Maydell 4233e2fcbf42SPeter Maydell ``elevateprivileges=string`` 4234e2fcbf42SPeter Maydell Disable set\*uid\|gid system calls 4235e2fcbf42SPeter Maydell 4236e2fcbf42SPeter Maydell ``spawn=string`` 4237e2fcbf42SPeter Maydell Disable \*fork and execve 4238e2fcbf42SPeter Maydell 4239e2fcbf42SPeter Maydell ``resourcecontrol=string`` 4240e2fcbf42SPeter Maydell Disable process affinity and schedular priority 4241e2fcbf42SPeter MaydellERST 42427d76ad4fSEduardo Otubo 4243715a664aSGerd HoffmannDEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig, 4244ad96090aSBlue Swirl "-readconfig <file>\n", QEMU_ARCH_ALL) 4245e2fcbf42SPeter MaydellSRST 4246e2fcbf42SPeter Maydell``-readconfig file`` 4247e2fcbf42SPeter Maydell Read device configuration from file. This approach is useful when 4248e2fcbf42SPeter Maydell you want to spawn QEMU process with many command line options but 4249e2fcbf42SPeter Maydell you don't want to exceed the command line character limit. 4250e2fcbf42SPeter MaydellERST 4251715a664aSGerd HoffmannDEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig, 4252715a664aSGerd Hoffmann "-writeconfig <file>\n" 4253ad96090aSBlue Swirl " read/write config file\n", QEMU_ARCH_ALL) 4254e2fcbf42SPeter MaydellSRST 4255e2fcbf42SPeter Maydell``-writeconfig file`` 4256e2fcbf42SPeter Maydell Write device configuration to file. The file can be either filename 4257e2fcbf42SPeter Maydell to save command line and device configuration into file or dash 4258e2fcbf42SPeter Maydell ``-``) character to print the output to stdout. This can be later 4259e2fcbf42SPeter Maydell used as input file for ``-readconfig`` option. 4260e2fcbf42SPeter MaydellERST 42612feac451SThomas Huth 4262f29a5614SEduardo HabkostDEF("no-user-config", 0, QEMU_OPTION_nouserconfig, 4263f29a5614SEduardo Habkost "-no-user-config\n" 42643478eae9SEduardo Habkost " do not load default user-provided config files at startup\n", 4265f29a5614SEduardo Habkost QEMU_ARCH_ALL) 4266e2fcbf42SPeter MaydellSRST 4267e2fcbf42SPeter Maydell``-no-user-config`` 4268e2fcbf42SPeter Maydell The ``-no-user-config`` option makes QEMU not load any of the 4269e2fcbf42SPeter Maydell user-provided config files on sysconfdir. 4270e2fcbf42SPeter MaydellERST 42712feac451SThomas Huth 4272ab6540d5SPrerna SaxenaDEF("trace", HAS_ARG, QEMU_OPTION_trace, 427310578a25SPaolo Bonzini "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 427423d15e86SLluís " specify tracing options\n", 4275ab6540d5SPrerna Saxena QEMU_ARCH_ALL) 4276e2fcbf42SPeter MaydellSRST 4277e2fcbf42SPeter Maydell``-trace [[enable=]pattern][,events=file][,file=file]`` 427809ce5f2dSPeter Maydell .. include:: ../qemu-option-trace.rst.inc 4279e2fcbf42SPeter Maydell 4280e2fcbf42SPeter MaydellERST 428142229a75SLluís VilanovaDEF("plugin", HAS_ARG, QEMU_OPTION_plugin, 428242229a75SLluís Vilanova "-plugin [file=]<file>[,arg=<string>]\n" 428342229a75SLluís Vilanova " load a plugin\n", 428442229a75SLluís Vilanova QEMU_ARCH_ALL) 4285e2fcbf42SPeter MaydellSRST 4286e2fcbf42SPeter Maydell``-plugin file=file[,arg=string]`` 4287e2fcbf42SPeter Maydell Load a plugin. 4288e2fcbf42SPeter Maydell 4289e2fcbf42SPeter Maydell ``file=file`` 4290e2fcbf42SPeter Maydell Load the given plugin from a shared library file. 4291e2fcbf42SPeter Maydell 4292e2fcbf42SPeter Maydell ``arg=string`` 4293e2fcbf42SPeter Maydell Argument string passed to the plugin. (Can be given multiple 4294e2fcbf42SPeter Maydell times.) 4295e2fcbf42SPeter MaydellERST 42963dbf2c7fSStefan Weil 429731e70d6cSMarkus ArmbrusterHXCOMM Internal use 429831e70d6cSMarkus ArmbrusterDEF("qtest", HAS_ARG, QEMU_OPTION_qtest, "", QEMU_ARCH_ALL) 429931e70d6cSMarkus ArmbrusterDEF("qtest-log", HAS_ARG, QEMU_OPTION_qtest_log, "", QEMU_ARCH_ALL) 4300c7f0f3b1SAnthony Liguori 43010f66998fSPaul Moore#ifdef __linux__ 43020f66998fSPaul MooreDEF("enable-fips", 0, QEMU_OPTION_enablefips, 43030f66998fSPaul Moore "-enable-fips enable FIPS 140-2 compliance\n", 43040f66998fSPaul Moore QEMU_ARCH_ALL) 43050f66998fSPaul Moore#endif 4306e2fcbf42SPeter MaydellSRST 4307e2fcbf42SPeter Maydell``-enable-fips`` 4308e2fcbf42SPeter Maydell Enable FIPS 140-2 compliance mode. 4309e2fcbf42SPeter MaydellERST 43100f66998fSPaul Moore 4311976e8c54SThomas HuthHXCOMM Deprecated by -accel tcg 4312c6e88b3bSBruce RogersDEF("no-kvm", 0, QEMU_OPTION_no_kvm, "", QEMU_ARCH_I386) 4313a0dac021SJan Kiszka 43145e2ac519SSeiji AguchiDEF("msg", HAS_ARG, QEMU_OPTION_msg, 43152880ffb0SMario Smarduch "-msg [timestamp[=on|off]][,guest-name=[on|off]]\n" 4316deda497bSMarkus Armbruster " control error message format\n" 43172880ffb0SMario Smarduch " timestamp=on enables timestamps (default: off)\n" 43182880ffb0SMario Smarduch " guest-name=on enables guest name prefix but only if\n" 43192880ffb0SMario Smarduch " -name guest option is set (default: off)\n", 43205e2ac519SSeiji Aguchi QEMU_ARCH_ALL) 4321e2fcbf42SPeter MaydellSRST 43222880ffb0SMario Smarduch``-msg [timestamp[=on|off]][,guest-name[=on|off]]`` 4323e2fcbf42SPeter Maydell Control error message format. 4324e2fcbf42SPeter Maydell 4325e2fcbf42SPeter Maydell ``timestamp=on|off`` 4326e2fcbf42SPeter Maydell Prefix messages with a timestamp. Default is off. 43272880ffb0SMario Smarduch 43282880ffb0SMario Smarduch ``guest-name=on|off`` 43292880ffb0SMario Smarduch Prefix messages with guest name but only if -name guest option is set 43302880ffb0SMario Smarduch otherwise the option is ignored. Default is off. 4331e2fcbf42SPeter MaydellERST 43325e2ac519SSeiji Aguchi 4333abfd9ce3SAmit ShahDEF("dump-vmstate", HAS_ARG, QEMU_OPTION_dump_vmstate, 4334abfd9ce3SAmit Shah "-dump-vmstate <file>\n" 4335abfd9ce3SAmit Shah " Output vmstate information in JSON format to file.\n" 4336abfd9ce3SAmit Shah " Use the scripts/vmstate-static-checker.py file to\n" 4337abfd9ce3SAmit Shah " check for possible regressions in migration code\n" 43382382053fSLaurent Vivier " by comparing two such vmstate dumps.\n", 4339abfd9ce3SAmit Shah QEMU_ARCH_ALL) 4340e2fcbf42SPeter MaydellSRST 4341e2fcbf42SPeter Maydell``-dump-vmstate file`` 4342e2fcbf42SPeter Maydell Dump json-encoded vmstate information for current machine type to 4343e2fcbf42SPeter Maydell file in file 4344e2fcbf42SPeter MaydellERST 4345abfd9ce3SAmit Shah 434612df189dSEmilio G. CotaDEF("enable-sync-profile", 0, QEMU_OPTION_enable_sync_profile, 434712df189dSEmilio G. Cota "-enable-sync-profile\n" 434812df189dSEmilio G. Cota " enable synchronization profiling\n", 434912df189dSEmilio G. Cota QEMU_ARCH_ALL) 4350e2fcbf42SPeter MaydellSRST 4351e2fcbf42SPeter Maydell``-enable-sync-profile`` 4352e2fcbf42SPeter Maydell Enable synchronization profiling. 4353e2fcbf42SPeter MaydellERST 435412df189dSEmilio G. Cota 435543f187a5SPaolo BonziniDEFHEADING() 4356de6b4f90SMarkus Armbruster 4357de6b4f90SMarkus ArmbrusterDEFHEADING(Generic object creation:) 4358b9174d4fSDaniel P. Berrange 4359b9174d4fSDaniel P. BerrangeDEF("object", HAS_ARG, QEMU_OPTION_object, 4360b9174d4fSDaniel P. Berrange "-object TYPENAME[,PROP1=VALUE1,...]\n" 4361b9174d4fSDaniel P. Berrange " create a new object of type TYPENAME setting properties\n" 4362b9174d4fSDaniel P. Berrange " in the order they are specified. Note that the 'id'\n" 4363b9174d4fSDaniel P. Berrange " property must be set. These objects are placed in the\n" 4364b9174d4fSDaniel P. Berrange " '/objects' path.\n", 4365b9174d4fSDaniel P. Berrange QEMU_ARCH_ALL) 4366e2fcbf42SPeter MaydellSRST 4367e2fcbf42SPeter Maydell``-object typename[,prop1=value1,...]`` 4368e2fcbf42SPeter Maydell Create a new object of type typename setting properties in the order 4369e2fcbf42SPeter Maydell they are specified. Note that the 'id' property must be set. These 4370e2fcbf42SPeter Maydell objects are placed in the '/objects' path. 4371e2fcbf42SPeter Maydell 4372e2fcbf42SPeter Maydell ``-object memory-backend-file,id=id,size=size,mem-path=dir,share=on|off,discard-data=on|off,merge=on|off,dump=on|off,prealloc=on|off,host-nodes=host-nodes,policy=default|preferred|bind|interleave,align=align`` 4373e2fcbf42SPeter Maydell Creates a memory file backend object, which can be used to back 4374e2fcbf42SPeter Maydell the guest RAM with huge pages. 4375e2fcbf42SPeter Maydell 4376e2fcbf42SPeter Maydell The ``id`` parameter is a unique ID that will be used to 4377e2fcbf42SPeter Maydell reference this memory region when configuring the ``-numa`` 4378e2fcbf42SPeter Maydell argument. 4379e2fcbf42SPeter Maydell 4380e2fcbf42SPeter Maydell The ``size`` option provides the size of the memory region, and 4381e2fcbf42SPeter Maydell accepts common suffixes, eg ``500M``. 4382e2fcbf42SPeter Maydell 4383e2fcbf42SPeter Maydell The ``mem-path`` provides the path to either a shared memory or 4384e2fcbf42SPeter Maydell huge page filesystem mount. 4385e2fcbf42SPeter Maydell 4386e2fcbf42SPeter Maydell The ``share`` boolean option determines whether the memory 4387e2fcbf42SPeter Maydell region is marked as private to QEMU, or shared. The latter 4388e2fcbf42SPeter Maydell allows a co-operating external process to access the QEMU memory 4389e2fcbf42SPeter Maydell region. 4390e2fcbf42SPeter Maydell 4391e2fcbf42SPeter Maydell The ``share`` is also required for pvrdma devices due to 4392e2fcbf42SPeter Maydell limitations in the RDMA API provided by Linux. 4393e2fcbf42SPeter Maydell 4394e2fcbf42SPeter Maydell Setting share=on might affect the ability to configure NUMA 4395e2fcbf42SPeter Maydell bindings for the memory backend under some circumstances, see 4396e2fcbf42SPeter Maydell Documentation/vm/numa\_memory\_policy.txt on the Linux kernel 4397e2fcbf42SPeter Maydell source tree for additional details. 4398e2fcbf42SPeter Maydell 4399e2fcbf42SPeter Maydell Setting the ``discard-data`` boolean option to on indicates that 4400e2fcbf42SPeter Maydell file contents can be destroyed when QEMU exits, to avoid 4401e2fcbf42SPeter Maydell unnecessarily flushing data to the backing file. Note that 4402e2fcbf42SPeter Maydell ``discard-data`` is only an optimization, and QEMU might not 4403e2fcbf42SPeter Maydell discard file contents if it aborts unexpectedly or is terminated 4404e2fcbf42SPeter Maydell using SIGKILL. 4405e2fcbf42SPeter Maydell 4406e2fcbf42SPeter Maydell The ``merge`` boolean option enables memory merge, also known as 4407e2fcbf42SPeter Maydell MADV\_MERGEABLE, so that Kernel Samepage Merging will consider 4408e2fcbf42SPeter Maydell the pages for memory deduplication. 4409e2fcbf42SPeter Maydell 4410e2fcbf42SPeter Maydell Setting the ``dump`` boolean option to off excludes the memory 4411e2fcbf42SPeter Maydell from core dumps. This feature is also known as MADV\_DONTDUMP. 4412e2fcbf42SPeter Maydell 4413e2fcbf42SPeter Maydell The ``prealloc`` boolean option enables memory preallocation. 4414e2fcbf42SPeter Maydell 4415e2fcbf42SPeter Maydell The ``host-nodes`` option binds the memory range to a list of 4416e2fcbf42SPeter Maydell NUMA host nodes. 4417e2fcbf42SPeter Maydell 4418e2fcbf42SPeter Maydell The ``policy`` option sets the NUMA policy to one of the 4419e2fcbf42SPeter Maydell following values: 4420e2fcbf42SPeter Maydell 4421e2fcbf42SPeter Maydell ``default`` 4422e2fcbf42SPeter Maydell default host policy 4423e2fcbf42SPeter Maydell 4424e2fcbf42SPeter Maydell ``preferred`` 4425e2fcbf42SPeter Maydell prefer the given host node list for allocation 4426e2fcbf42SPeter Maydell 4427e2fcbf42SPeter Maydell ``bind`` 4428e2fcbf42SPeter Maydell restrict memory allocation to the given host node list 4429e2fcbf42SPeter Maydell 4430e2fcbf42SPeter Maydell ``interleave`` 4431e2fcbf42SPeter Maydell interleave memory allocations across the given host node 4432e2fcbf42SPeter Maydell list 4433e2fcbf42SPeter Maydell 4434e2fcbf42SPeter Maydell The ``align`` option specifies the base address alignment when 4435e2fcbf42SPeter Maydell QEMU mmap(2) ``mem-path``, and accepts common suffixes, eg 4436e2fcbf42SPeter Maydell ``2M``. Some backend store specified by ``mem-path`` requires an 4437e2fcbf42SPeter Maydell alignment different than the default one used by QEMU, eg the 4438e2fcbf42SPeter Maydell device DAX /dev/dax0.0 requires 2M alignment rather than 4K. In 4439e2fcbf42SPeter Maydell such cases, users can specify the required alignment via this 4440e2fcbf42SPeter Maydell option. 4441e2fcbf42SPeter Maydell 4442e2fcbf42SPeter Maydell The ``pmem`` option specifies whether the backing file specified 4443e2fcbf42SPeter Maydell by ``mem-path`` is in host persistent memory that can be 4444e2fcbf42SPeter Maydell accessed using the SNIA NVM programming model (e.g. Intel 4445e2fcbf42SPeter Maydell NVDIMM). If ``pmem`` is set to 'on', QEMU will take necessary 4446e2fcbf42SPeter Maydell operations to guarantee the persistence of its own writes to 4447e2fcbf42SPeter Maydell ``mem-path`` (e.g. in vNVDIMM label emulation and live 4448e2fcbf42SPeter Maydell migration). Also, we will map the backend-file with MAP\_SYNC 4449e2fcbf42SPeter Maydell flag, which ensures the file metadata is in sync for 4450e2fcbf42SPeter Maydell ``mem-path`` in case of host crash or a power failure. MAP\_SYNC 4451e2fcbf42SPeter Maydell requires support from both the host kernel (since Linux kernel 4452e2fcbf42SPeter Maydell 4.15) and the filesystem of ``mem-path`` mounted with DAX 4453e2fcbf42SPeter Maydell option. 4454e2fcbf42SPeter Maydell 4455e2fcbf42SPeter Maydell ``-object memory-backend-ram,id=id,merge=on|off,dump=on|off,share=on|off,prealloc=on|off,size=size,host-nodes=host-nodes,policy=default|preferred|bind|interleave`` 4456e2fcbf42SPeter Maydell Creates a memory backend object, which can be used to back the 4457e2fcbf42SPeter Maydell guest RAM. Memory backend objects offer more control than the 4458e2fcbf42SPeter Maydell ``-m`` option that is traditionally used to define guest RAM. 4459e2fcbf42SPeter Maydell Please refer to ``memory-backend-file`` for a description of the 4460e2fcbf42SPeter Maydell options. 4461e2fcbf42SPeter Maydell 4462e2fcbf42SPeter Maydell ``-object memory-backend-memfd,id=id,merge=on|off,dump=on|off,share=on|off,prealloc=on|off,size=size,host-nodes=host-nodes,policy=default|preferred|bind|interleave,seal=on|off,hugetlb=on|off,hugetlbsize=size`` 4463e2fcbf42SPeter Maydell Creates an anonymous memory file backend object, which allows 4464e2fcbf42SPeter Maydell QEMU to share the memory with an external process (e.g. when 4465e2fcbf42SPeter Maydell using vhost-user). The memory is allocated with memfd and 4466e2fcbf42SPeter Maydell optional sealing. (Linux only) 4467e2fcbf42SPeter Maydell 4468e2fcbf42SPeter Maydell The ``seal`` option creates a sealed-file, that will block 4469e2fcbf42SPeter Maydell further resizing the memory ('on' by default). 4470e2fcbf42SPeter Maydell 4471e2fcbf42SPeter Maydell The ``hugetlb`` option specify the file to be created resides in 4472e2fcbf42SPeter Maydell the hugetlbfs filesystem (since Linux 4.14). Used in conjunction 4473e2fcbf42SPeter Maydell with the ``hugetlb`` option, the ``hugetlbsize`` option specify 4474e2fcbf42SPeter Maydell the hugetlb page size on systems that support multiple hugetlb 4475e2fcbf42SPeter Maydell page sizes (it must be a power of 2 value supported by the 4476e2fcbf42SPeter Maydell system). 4477e2fcbf42SPeter Maydell 4478e2fcbf42SPeter Maydell In some versions of Linux, the ``hugetlb`` option is 4479e2fcbf42SPeter Maydell incompatible with the ``seal`` option (requires at least Linux 4480e2fcbf42SPeter Maydell 4.16). 4481e2fcbf42SPeter Maydell 4482e2fcbf42SPeter Maydell Please refer to ``memory-backend-file`` for a description of the 4483e2fcbf42SPeter Maydell other options. 4484e2fcbf42SPeter Maydell 4485e2fcbf42SPeter Maydell The ``share`` boolean option is on by default with memfd. 4486e2fcbf42SPeter Maydell 4487e2fcbf42SPeter Maydell ``-object rng-builtin,id=id`` 4488e2fcbf42SPeter Maydell Creates a random number generator backend which obtains entropy 4489e2fcbf42SPeter Maydell from QEMU builtin functions. The ``id`` parameter is a unique ID 4490e2fcbf42SPeter Maydell that will be used to reference this entropy backend from the 4491e2fcbf42SPeter Maydell ``virtio-rng`` device. By default, the ``virtio-rng`` device 4492e2fcbf42SPeter Maydell uses this RNG backend. 4493e2fcbf42SPeter Maydell 4494e2fcbf42SPeter Maydell ``-object rng-random,id=id,filename=/dev/random`` 4495e2fcbf42SPeter Maydell Creates a random number generator backend which obtains entropy 4496e2fcbf42SPeter Maydell from a device on the host. The ``id`` parameter is a unique ID 4497e2fcbf42SPeter Maydell that will be used to reference this entropy backend from the 4498e2fcbf42SPeter Maydell ``virtio-rng`` device. The ``filename`` parameter specifies 4499e2fcbf42SPeter Maydell which file to obtain entropy from and if omitted defaults to 4500e2fcbf42SPeter Maydell ``/dev/urandom``. 4501e2fcbf42SPeter Maydell 4502e2fcbf42SPeter Maydell ``-object rng-egd,id=id,chardev=chardevid`` 4503e2fcbf42SPeter Maydell Creates a random number generator backend which obtains entropy 4504e2fcbf42SPeter Maydell from an external daemon running on the host. The ``id`` 4505e2fcbf42SPeter Maydell parameter is a unique ID that will be used to reference this 4506e2fcbf42SPeter Maydell entropy backend from the ``virtio-rng`` device. The ``chardev`` 4507e2fcbf42SPeter Maydell parameter is the unique ID of a character device backend that 4508e2fcbf42SPeter Maydell provides the connection to the RNG daemon. 4509e2fcbf42SPeter Maydell 4510e2fcbf42SPeter Maydell ``-object tls-creds-anon,id=id,endpoint=endpoint,dir=/path/to/cred/dir,verify-peer=on|off`` 4511e2fcbf42SPeter Maydell Creates a TLS anonymous credentials object, which can be used to 4512e2fcbf42SPeter Maydell provide TLS support on network backends. The ``id`` parameter is 4513e2fcbf42SPeter Maydell a unique ID which network backends will use to access the 4514e2fcbf42SPeter Maydell credentials. The ``endpoint`` is either ``server`` or ``client`` 4515e2fcbf42SPeter Maydell depending on whether the QEMU network backend that uses the 4516e2fcbf42SPeter Maydell credentials will be acting as a client or as a server. If 4517e2fcbf42SPeter Maydell ``verify-peer`` is enabled (the default) then once the handshake 4518e2fcbf42SPeter Maydell is completed, the peer credentials will be verified, though this 4519e2fcbf42SPeter Maydell is a no-op for anonymous credentials. 4520e2fcbf42SPeter Maydell 4521e2fcbf42SPeter Maydell The dir parameter tells QEMU where to find the credential files. 4522e2fcbf42SPeter Maydell For server endpoints, this directory may contain a file 4523e2fcbf42SPeter Maydell dh-params.pem providing diffie-hellman parameters to use for the 4524e2fcbf42SPeter Maydell TLS server. If the file is missing, QEMU will generate a set of 4525e2fcbf42SPeter Maydell DH parameters at startup. This is a computationally expensive 4526e2fcbf42SPeter Maydell operation that consumes random pool entropy, so it is 4527e2fcbf42SPeter Maydell recommended that a persistent set of parameters be generated 4528e2fcbf42SPeter Maydell upfront and saved. 4529e2fcbf42SPeter Maydell 4530e2fcbf42SPeter Maydell ``-object tls-creds-psk,id=id,endpoint=endpoint,dir=/path/to/keys/dir[,username=username]`` 4531e2fcbf42SPeter Maydell Creates a TLS Pre-Shared Keys (PSK) credentials object, which 4532e2fcbf42SPeter Maydell can be used to provide TLS support on network backends. The 4533e2fcbf42SPeter Maydell ``id`` parameter is a unique ID which network backends will use 4534e2fcbf42SPeter Maydell to access the credentials. The ``endpoint`` is either ``server`` 4535e2fcbf42SPeter Maydell or ``client`` depending on whether the QEMU network backend that 4536e2fcbf42SPeter Maydell uses the credentials will be acting as a client or as a server. 4537e2fcbf42SPeter Maydell For clients only, ``username`` is the username which will be 4538e2fcbf42SPeter Maydell sent to the server. If omitted it defaults to "qemu". 4539e2fcbf42SPeter Maydell 4540e2fcbf42SPeter Maydell The dir parameter tells QEMU where to find the keys file. It is 4541e2fcbf42SPeter Maydell called "dir/keys.psk" and contains "username:key" pairs. This 4542e2fcbf42SPeter Maydell file can most easily be created using the GnuTLS ``psktool`` 4543e2fcbf42SPeter Maydell program. 4544e2fcbf42SPeter Maydell 4545e2fcbf42SPeter Maydell For server endpoints, dir may also contain a file dh-params.pem 4546e2fcbf42SPeter Maydell providing diffie-hellman parameters to use for the TLS server. 4547e2fcbf42SPeter Maydell If the file is missing, QEMU will generate a set of DH 4548e2fcbf42SPeter Maydell parameters at startup. This is a computationally expensive 4549e2fcbf42SPeter Maydell operation that consumes random pool entropy, so it is 4550e2fcbf42SPeter Maydell recommended that a persistent set of parameters be generated up 4551e2fcbf42SPeter Maydell front and saved. 4552e2fcbf42SPeter Maydell 4553e2fcbf42SPeter Maydell ``-object tls-creds-x509,id=id,endpoint=endpoint,dir=/path/to/cred/dir,priority=priority,verify-peer=on|off,passwordid=id`` 4554e2fcbf42SPeter Maydell Creates a TLS anonymous credentials object, which can be used to 4555e2fcbf42SPeter Maydell provide TLS support on network backends. The ``id`` parameter is 4556e2fcbf42SPeter Maydell a unique ID which network backends will use to access the 4557e2fcbf42SPeter Maydell credentials. The ``endpoint`` is either ``server`` or ``client`` 4558e2fcbf42SPeter Maydell depending on whether the QEMU network backend that uses the 4559e2fcbf42SPeter Maydell credentials will be acting as a client or as a server. If 4560e2fcbf42SPeter Maydell ``verify-peer`` is enabled (the default) then once the handshake 4561e2fcbf42SPeter Maydell is completed, the peer credentials will be verified. With x509 4562e2fcbf42SPeter Maydell certificates, this implies that the clients must be provided 4563e2fcbf42SPeter Maydell with valid client certificates too. 4564e2fcbf42SPeter Maydell 4565e2fcbf42SPeter Maydell The dir parameter tells QEMU where to find the credential files. 4566e2fcbf42SPeter Maydell For server endpoints, this directory may contain a file 4567e2fcbf42SPeter Maydell dh-params.pem providing diffie-hellman parameters to use for the 4568e2fcbf42SPeter Maydell TLS server. If the file is missing, QEMU will generate a set of 4569e2fcbf42SPeter Maydell DH parameters at startup. This is a computationally expensive 4570e2fcbf42SPeter Maydell operation that consumes random pool entropy, so it is 4571e2fcbf42SPeter Maydell recommended that a persistent set of parameters be generated 4572e2fcbf42SPeter Maydell upfront and saved. 4573e2fcbf42SPeter Maydell 4574e2fcbf42SPeter Maydell For x509 certificate credentials the directory will contain 4575e2fcbf42SPeter Maydell further files providing the x509 certificates. The certificates 4576e2fcbf42SPeter Maydell must be stored in PEM format, in filenames ca-cert.pem, 4577e2fcbf42SPeter Maydell ca-crl.pem (optional), server-cert.pem (only servers), 4578e2fcbf42SPeter Maydell server-key.pem (only servers), client-cert.pem (only clients), 4579e2fcbf42SPeter Maydell and client-key.pem (only clients). 4580e2fcbf42SPeter Maydell 4581e2fcbf42SPeter Maydell For the server-key.pem and client-key.pem files which contain 4582e2fcbf42SPeter Maydell sensitive private keys, it is possible to use an encrypted 4583e2fcbf42SPeter Maydell version by providing the passwordid parameter. This provides the 4584e2fcbf42SPeter Maydell ID of a previously created ``secret`` object containing the 4585e2fcbf42SPeter Maydell password for decryption. 4586e2fcbf42SPeter Maydell 4587e2fcbf42SPeter Maydell The priority parameter allows to override the global default 4588e2fcbf42SPeter Maydell priority used by gnutls. This can be useful if the system 4589e2fcbf42SPeter Maydell administrator needs to use a weaker set of crypto priorities for 4590e2fcbf42SPeter Maydell QEMU without potentially forcing the weakness onto all 4591e2fcbf42SPeter Maydell applications. Or conversely if one wants wants a stronger 4592e2fcbf42SPeter Maydell default for QEMU than for all other applications, they can do 4593e2fcbf42SPeter Maydell this through this parameter. Its format is a gnutls priority 4594e2fcbf42SPeter Maydell string as described at 4595e2fcbf42SPeter Maydell https://gnutls.org/manual/html_node/Priority-Strings.html. 4596e2fcbf42SPeter Maydell 4597993aec27SPhilippe Mathieu-Daudé ``-object tls-cipher-suites,id=id,priority=priority`` 4598993aec27SPhilippe Mathieu-Daudé Creates a TLS cipher suites object, which can be used to control 4599993aec27SPhilippe Mathieu-Daudé the TLS cipher/protocol algorithms that applications are permitted 4600993aec27SPhilippe Mathieu-Daudé to use. 4601993aec27SPhilippe Mathieu-Daudé 4602993aec27SPhilippe Mathieu-Daudé The ``id`` parameter is a unique ID which frontends will use to 4603993aec27SPhilippe Mathieu-Daudé access the ordered list of permitted TLS cipher suites from the 4604993aec27SPhilippe Mathieu-Daudé host. 4605993aec27SPhilippe Mathieu-Daudé 4606993aec27SPhilippe Mathieu-Daudé The ``priority`` parameter allows to override the global default 4607993aec27SPhilippe Mathieu-Daudé priority used by gnutls. This can be useful if the system 4608993aec27SPhilippe Mathieu-Daudé administrator needs to use a weaker set of crypto priorities for 4609993aec27SPhilippe Mathieu-Daudé QEMU without potentially forcing the weakness onto all 4610993aec27SPhilippe Mathieu-Daudé applications. Or conversely if one wants wants a stronger 4611993aec27SPhilippe Mathieu-Daudé default for QEMU than for all other applications, they can do 4612993aec27SPhilippe Mathieu-Daudé this through this parameter. Its format is a gnutls priority 4613993aec27SPhilippe Mathieu-Daudé string as described at 4614993aec27SPhilippe Mathieu-Daudé https://gnutls.org/manual/html_node/Priority-Strings.html. 4615993aec27SPhilippe Mathieu-Daudé 461669699f30SPhilippe Mathieu-Daudé An example of use of this object is to control UEFI HTTPS Boot. 461769699f30SPhilippe Mathieu-Daudé The tls-cipher-suites object exposes the ordered list of permitted 461869699f30SPhilippe Mathieu-Daudé TLS cipher suites from the host side to the guest firmware, via 461969699f30SPhilippe Mathieu-Daudé fw_cfg. The list is represented as an array of IANA_TLS_CIPHER 462069699f30SPhilippe Mathieu-Daudé objects. The firmware uses the IANA_TLS_CIPHER array for configuring 462169699f30SPhilippe Mathieu-Daudé guest-side TLS. 462269699f30SPhilippe Mathieu-Daudé 462369699f30SPhilippe Mathieu-Daudé In the following example, the priority at which the host-side policy 462469699f30SPhilippe Mathieu-Daudé is retrieved is given by the ``priority`` property. 462569699f30SPhilippe Mathieu-Daudé Given that QEMU uses GNUTLS, ``priority=@SYSTEM`` may be used to 462669699f30SPhilippe Mathieu-Daudé refer to /etc/crypto-policies/back-ends/gnutls.config. 462769699f30SPhilippe Mathieu-Daudé 462869699f30SPhilippe Mathieu-Daudé .. parsed-literal:: 462969699f30SPhilippe Mathieu-Daudé 463069699f30SPhilippe Mathieu-Daudé # |qemu_system| \ 463169699f30SPhilippe Mathieu-Daudé -object tls-cipher-suites,id=mysuite0,priority=@SYSTEM \ 463269699f30SPhilippe Mathieu-Daudé -fw_cfg name=etc/edk2/https/ciphers,gen_id=mysuite0 463369699f30SPhilippe Mathieu-Daudé 4634e2fcbf42SPeter Maydell ``-object filter-buffer,id=id,netdev=netdevid,interval=t[,queue=all|rx|tx][,status=on|off][,position=head|tail|id=<id>][,insert=behind|before]`` 4635e2fcbf42SPeter Maydell Interval t can't be 0, this filter batches the packet delivery: 4636e2fcbf42SPeter Maydell all packets arriving in a given interval on netdev netdevid are 4637e2fcbf42SPeter Maydell delayed until the end of the interval. Interval is in 4638e2fcbf42SPeter Maydell microseconds. ``status`` is optional that indicate whether the 4639e2fcbf42SPeter Maydell netfilter is on (enabled) or off (disabled), the default status 4640e2fcbf42SPeter Maydell for netfilter will be 'on'. 4641e2fcbf42SPeter Maydell 4642e2fcbf42SPeter Maydell queue all\|rx\|tx is an option that can be applied to any 4643e2fcbf42SPeter Maydell netfilter. 4644e2fcbf42SPeter Maydell 4645e2fcbf42SPeter Maydell ``all``: the filter is attached both to the receive and the 4646e2fcbf42SPeter Maydell transmit queue of the netdev (default). 4647e2fcbf42SPeter Maydell 4648e2fcbf42SPeter Maydell ``rx``: the filter is attached to the receive queue of the 4649e2fcbf42SPeter Maydell netdev, where it will receive packets sent to the netdev. 4650e2fcbf42SPeter Maydell 4651e2fcbf42SPeter Maydell ``tx``: the filter is attached to the transmit queue of the 4652e2fcbf42SPeter Maydell netdev, where it will receive packets sent by the netdev. 4653e2fcbf42SPeter Maydell 4654e2fcbf42SPeter Maydell position head\|tail\|id=<id> is an option to specify where the 4655e2fcbf42SPeter Maydell filter should be inserted in the filter list. It can be applied 4656e2fcbf42SPeter Maydell to any netfilter. 4657e2fcbf42SPeter Maydell 4658e2fcbf42SPeter Maydell ``head``: the filter is inserted at the head of the filter list, 4659e2fcbf42SPeter Maydell before any existing filters. 4660e2fcbf42SPeter Maydell 4661e2fcbf42SPeter Maydell ``tail``: the filter is inserted at the tail of the filter list, 4662e2fcbf42SPeter Maydell behind any existing filters (default). 4663e2fcbf42SPeter Maydell 4664e2fcbf42SPeter Maydell ``id=<id>``: the filter is inserted before or behind the filter 4665e2fcbf42SPeter Maydell specified by <id>, see the insert option below. 4666e2fcbf42SPeter Maydell 4667e2fcbf42SPeter Maydell insert behind\|before is an option to specify where to insert 4668e2fcbf42SPeter Maydell the new filter relative to the one specified with 4669e2fcbf42SPeter Maydell position=id=<id>. It can be applied to any netfilter. 4670e2fcbf42SPeter Maydell 4671e2fcbf42SPeter Maydell ``before``: insert before the specified filter. 4672e2fcbf42SPeter Maydell 4673e2fcbf42SPeter Maydell ``behind``: insert behind the specified filter (default). 4674e2fcbf42SPeter Maydell 4675e2fcbf42SPeter Maydell ``-object filter-mirror,id=id,netdev=netdevid,outdev=chardevid,queue=all|rx|tx[,vnet_hdr_support][,position=head|tail|id=<id>][,insert=behind|before]`` 4676e2fcbf42SPeter Maydell filter-mirror on netdev netdevid,mirror net packet to 4677e2fcbf42SPeter Maydell chardevchardevid, if it has the vnet\_hdr\_support flag, 4678e2fcbf42SPeter Maydell filter-mirror will mirror packet with vnet\_hdr\_len. 4679e2fcbf42SPeter Maydell 4680e2fcbf42SPeter Maydell ``-object filter-redirector,id=id,netdev=netdevid,indev=chardevid,outdev=chardevid,queue=all|rx|tx[,vnet_hdr_support][,position=head|tail|id=<id>][,insert=behind|before]`` 4681e2fcbf42SPeter Maydell filter-redirector on netdev netdevid,redirect filter's net 4682e2fcbf42SPeter Maydell packet to chardev chardevid,and redirect indev's packet to 4683e2fcbf42SPeter Maydell filter.if it has the vnet\_hdr\_support flag, filter-redirector 4684e2fcbf42SPeter Maydell will redirect packet with vnet\_hdr\_len. Create a 4685e2fcbf42SPeter Maydell filter-redirector we need to differ outdev id from indev id, id 4686e2fcbf42SPeter Maydell can not be the same. we can just use indev or outdev, but at 4687e2fcbf42SPeter Maydell least one of indev or outdev need to be specified. 4688e2fcbf42SPeter Maydell 4689e2fcbf42SPeter Maydell ``-object filter-rewriter,id=id,netdev=netdevid,queue=all|rx|tx,[vnet_hdr_support][,position=head|tail|id=<id>][,insert=behind|before]`` 4690e2fcbf42SPeter Maydell Filter-rewriter is a part of COLO project.It will rewrite tcp 4691e2fcbf42SPeter Maydell packet to secondary from primary to keep secondary tcp 4692e2fcbf42SPeter Maydell connection,and rewrite tcp packet to primary from secondary make 4693e2fcbf42SPeter Maydell tcp packet can be handled by client.if it has the 4694e2fcbf42SPeter Maydell vnet\_hdr\_support flag, we can parse packet with vnet header. 4695e2fcbf42SPeter Maydell 4696e2fcbf42SPeter Maydell usage: colo secondary: -object 4697e2fcbf42SPeter Maydell filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 -object 4698e2fcbf42SPeter Maydell filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 -object 4699e2fcbf42SPeter Maydell filter-rewriter,id=rew0,netdev=hn0,queue=all 4700e2fcbf42SPeter Maydell 4701e2fcbf42SPeter Maydell ``-object filter-dump,id=id,netdev=dev[,file=filename][,maxlen=len][,position=head|tail|id=<id>][,insert=behind|before]`` 4702e2fcbf42SPeter Maydell Dump the network traffic on netdev dev to the file specified by 4703e2fcbf42SPeter Maydell filename. At most len bytes (64k by default) per packet are 4704e2fcbf42SPeter Maydell stored. The file format is libpcap, so it can be analyzed with 4705e2fcbf42SPeter Maydell tools such as tcpdump or Wireshark. 4706e2fcbf42SPeter Maydell 4707a2e5cb7aSZhang Chen ``-object colo-compare,id=id,primary_in=chardevid,secondary_in=chardevid,outdev=chardevid,iothread=id[,vnet_hdr_support][,notify_dev=id][,compare_timeout=@var{ms}][,expired_scan_cycle=@var{ms}][,max_queue_size=@var{size}]`` 4708e2fcbf42SPeter Maydell Colo-compare gets packet from primary\_in chardevid and 47092b28a7efSZhang Chen secondary\_in, then compare whether the payload of primary packet 47102b28a7efSZhang Chen and secondary packet are the same. If same, it will output 47112b28a7efSZhang Chen primary packet to out\_dev, else it will notify COLO-framework to do 47122b28a7efSZhang Chen checkpoint and send primary packet to out\_dev. In order to 47132b28a7efSZhang Chen improve efficiency, we need to put the task of comparison in 47142b28a7efSZhang Chen another iothread. If it has the vnet\_hdr\_support flag, 47152b28a7efSZhang Chen colo compare will send/recv packet with vnet\_hdr\_len. 47162b28a7efSZhang Chen The compare\_timeout=@var{ms} determines the maximum time of the 47172b28a7efSZhang Chen colo-compare hold the packet. The expired\_scan\_cycle=@var{ms} 47182b28a7efSZhang Chen is to set the period of scanning expired primary node network packets. 47192b28a7efSZhang Chen The max\_queue\_size=@var{size} is to set the max compare queue 47202b28a7efSZhang Chen size depend on user environment. 47212b28a7efSZhang Chen If user want to use Xen COLO, need to add the notify\_dev to 47229cc43c94SZhang Chen notify Xen colo-frame to do checkpoint. 4723e2fcbf42SPeter Maydell 47242b28a7efSZhang Chen COLO-compare must be used with the help of filter-mirror, 47252b28a7efSZhang Chen filter-redirector and filter-rewriter. 4726e2fcbf42SPeter Maydell 4727e2fcbf42SPeter Maydell :: 4728e2fcbf42SPeter Maydell 4729e2fcbf42SPeter Maydell KVM COLO 4730e2fcbf42SPeter Maydell 4731e2fcbf42SPeter Maydell primary: 4732e2fcbf42SPeter Maydell -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown 4733e2fcbf42SPeter Maydell -device e1000,id=e0,netdev=hn0,mac=52:a4:00:12:78:66 4734e2fcbf42SPeter Maydell -chardev socket,id=mirror0,host=3.3.3.3,port=9003,server,nowait 4735e2fcbf42SPeter Maydell -chardev socket,id=compare1,host=3.3.3.3,port=9004,server,nowait 4736e2fcbf42SPeter Maydell -chardev socket,id=compare0,host=3.3.3.3,port=9001,server,nowait 4737e2fcbf42SPeter Maydell -chardev socket,id=compare0-0,host=3.3.3.3,port=9001 4738e2fcbf42SPeter Maydell -chardev socket,id=compare_out,host=3.3.3.3,port=9005,server,nowait 4739e2fcbf42SPeter Maydell -chardev socket,id=compare_out0,host=3.3.3.3,port=9005 4740e2fcbf42SPeter Maydell -object iothread,id=iothread1 4741e2fcbf42SPeter Maydell -object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0 4742e2fcbf42SPeter Maydell -object filter-redirector,netdev=hn0,id=redire0,queue=rx,indev=compare_out 4743e2fcbf42SPeter Maydell -object filter-redirector,netdev=hn0,id=redire1,queue=rx,outdev=compare0 4744e2fcbf42SPeter Maydell -object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0,iothread=iothread1 4745e2fcbf42SPeter Maydell 4746e2fcbf42SPeter Maydell secondary: 4747e2fcbf42SPeter Maydell -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,down script=/etc/qemu-ifdown 4748e2fcbf42SPeter Maydell -device e1000,netdev=hn0,mac=52:a4:00:12:78:66 4749e2fcbf42SPeter Maydell -chardev socket,id=red0,host=3.3.3.3,port=9003 4750e2fcbf42SPeter Maydell -chardev socket,id=red1,host=3.3.3.3,port=9004 4751e2fcbf42SPeter Maydell -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 4752e2fcbf42SPeter Maydell -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 4753e2fcbf42SPeter Maydell 4754e2fcbf42SPeter Maydell 4755e2fcbf42SPeter Maydell Xen COLO 4756e2fcbf42SPeter Maydell 4757e2fcbf42SPeter Maydell primary: 4758e2fcbf42SPeter Maydell -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown 4759e2fcbf42SPeter Maydell -device e1000,id=e0,netdev=hn0,mac=52:a4:00:12:78:66 4760e2fcbf42SPeter Maydell -chardev socket,id=mirror0,host=3.3.3.3,port=9003,server,nowait 4761e2fcbf42SPeter Maydell -chardev socket,id=compare1,host=3.3.3.3,port=9004,server,nowait 4762e2fcbf42SPeter Maydell -chardev socket,id=compare0,host=3.3.3.3,port=9001,server,nowait 4763e2fcbf42SPeter Maydell -chardev socket,id=compare0-0,host=3.3.3.3,port=9001 4764e2fcbf42SPeter Maydell -chardev socket,id=compare_out,host=3.3.3.3,port=9005,server,nowait 4765e2fcbf42SPeter Maydell -chardev socket,id=compare_out0,host=3.3.3.3,port=9005 4766e2fcbf42SPeter Maydell -chardev socket,id=notify_way,host=3.3.3.3,port=9009,server,nowait 4767e2fcbf42SPeter Maydell -object filter-mirror,id=m0,netdev=hn0,queue=tx,outdev=mirror0 4768e2fcbf42SPeter Maydell -object filter-redirector,netdev=hn0,id=redire0,queue=rx,indev=compare_out 4769e2fcbf42SPeter Maydell -object filter-redirector,netdev=hn0,id=redire1,queue=rx,outdev=compare0 4770e2fcbf42SPeter Maydell -object iothread,id=iothread1 4771e2fcbf42SPeter Maydell -object colo-compare,id=comp0,primary_in=compare0-0,secondary_in=compare1,outdev=compare_out0,notify_dev=nofity_way,iothread=iothread1 4772e2fcbf42SPeter Maydell 4773e2fcbf42SPeter Maydell secondary: 4774e2fcbf42SPeter Maydell -netdev tap,id=hn0,vhost=off,script=/etc/qemu-ifup,down script=/etc/qemu-ifdown 4775e2fcbf42SPeter Maydell -device e1000,netdev=hn0,mac=52:a4:00:12:78:66 4776e2fcbf42SPeter Maydell -chardev socket,id=red0,host=3.3.3.3,port=9003 4777e2fcbf42SPeter Maydell -chardev socket,id=red1,host=3.3.3.3,port=9004 4778e2fcbf42SPeter Maydell -object filter-redirector,id=f1,netdev=hn0,queue=tx,indev=red0 4779e2fcbf42SPeter Maydell -object filter-redirector,id=f2,netdev=hn0,queue=rx,outdev=red1 4780e2fcbf42SPeter Maydell 4781e2fcbf42SPeter Maydell If you want to know the detail of above command line, you can 4782e2fcbf42SPeter Maydell read the colo-compare git log. 4783e2fcbf42SPeter Maydell 4784e2fcbf42SPeter Maydell ``-object cryptodev-backend-builtin,id=id[,queues=queues]`` 4785e2fcbf42SPeter Maydell Creates a cryptodev backend which executes crypto opreation from 4786e2fcbf42SPeter Maydell the QEMU cipher APIS. The id parameter is a unique ID that will 4787e2fcbf42SPeter Maydell be used to reference this cryptodev backend from the 4788e2fcbf42SPeter Maydell ``virtio-crypto`` device. The queues parameter is optional, 4789e2fcbf42SPeter Maydell which specify the queue number of cryptodev backend, the default 4790e2fcbf42SPeter Maydell of queues is 1. 4791e2fcbf42SPeter Maydell 479209ce5f2dSPeter Maydell .. parsed-literal:: 4793e2fcbf42SPeter Maydell 4794e2fcbf42SPeter Maydell # |qemu_system| \ 4795e2fcbf42SPeter Maydell [...] \ 4796e2fcbf42SPeter Maydell -object cryptodev-backend-builtin,id=cryptodev0 \ 4797e2fcbf42SPeter Maydell -device virtio-crypto-pci,id=crypto0,cryptodev=cryptodev0 \ 4798e2fcbf42SPeter Maydell [...] 4799e2fcbf42SPeter Maydell 4800e2fcbf42SPeter Maydell ``-object cryptodev-vhost-user,id=id,chardev=chardevid[,queues=queues]`` 4801e2fcbf42SPeter Maydell Creates a vhost-user cryptodev backend, backed by a chardev 4802e2fcbf42SPeter Maydell chardevid. The id parameter is a unique ID that will be used to 4803e2fcbf42SPeter Maydell reference this cryptodev backend from the ``virtio-crypto`` 4804e2fcbf42SPeter Maydell device. The chardev should be a unix domain socket backed one. 4805e2fcbf42SPeter Maydell The vhost-user uses a specifically defined protocol to pass 4806e2fcbf42SPeter Maydell vhost ioctl replacement messages to an application on the other 4807e2fcbf42SPeter Maydell end of the socket. The queues parameter is optional, which 4808e2fcbf42SPeter Maydell specify the queue number of cryptodev backend for multiqueue 4809e2fcbf42SPeter Maydell vhost-user, the default of queues is 1. 4810e2fcbf42SPeter Maydell 481109ce5f2dSPeter Maydell .. parsed-literal:: 4812e2fcbf42SPeter Maydell 4813e2fcbf42SPeter Maydell # |qemu_system| \ 4814e2fcbf42SPeter Maydell [...] \ 4815e2fcbf42SPeter Maydell -chardev socket,id=chardev0,path=/path/to/socket \ 4816e2fcbf42SPeter Maydell -object cryptodev-vhost-user,id=cryptodev0,chardev=chardev0 \ 4817e2fcbf42SPeter Maydell -device virtio-crypto-pci,id=crypto0,cryptodev=cryptodev0 \ 4818e2fcbf42SPeter Maydell [...] 4819e2fcbf42SPeter Maydell 4820e2fcbf42SPeter Maydell ``-object secret,id=id,data=string,format=raw|base64[,keyid=secretid,iv=string]`` 482109ce5f2dSPeter Maydell \ 4822e2fcbf42SPeter Maydell ``-object secret,id=id,file=filename,format=raw|base64[,keyid=secretid,iv=string]`` 4823e2fcbf42SPeter Maydell Defines a secret to store a password, encryption key, or some 4824e2fcbf42SPeter Maydell other sensitive data. The sensitive data can either be passed 4825e2fcbf42SPeter Maydell directly via the data parameter, or indirectly via the file 4826e2fcbf42SPeter Maydell parameter. Using the data parameter is insecure unless the 4827e2fcbf42SPeter Maydell sensitive data is encrypted. 4828e2fcbf42SPeter Maydell 4829e2fcbf42SPeter Maydell The sensitive data can be provided in raw format (the default), 4830e2fcbf42SPeter Maydell or base64. When encoded as JSON, the raw format only supports 4831e2fcbf42SPeter Maydell valid UTF-8 characters, so base64 is recommended for sending 4832e2fcbf42SPeter Maydell binary data. QEMU will convert from which ever format is 4833e2fcbf42SPeter Maydell provided to the format it needs internally. eg, an RBD password 4834e2fcbf42SPeter Maydell can be provided in raw format, even though it will be base64 4835e2fcbf42SPeter Maydell encoded when passed onto the RBD sever. 4836e2fcbf42SPeter Maydell 4837e2fcbf42SPeter Maydell For added protection, it is possible to encrypt the data 4838e2fcbf42SPeter Maydell associated with a secret using the AES-256-CBC cipher. Use of 4839e2fcbf42SPeter Maydell encryption is indicated by providing the keyid and iv 4840e2fcbf42SPeter Maydell parameters. The keyid parameter provides the ID of a previously 4841e2fcbf42SPeter Maydell defined secret that contains the AES-256 decryption key. This 4842e2fcbf42SPeter Maydell key should be 32-bytes long and be base64 encoded. The iv 4843e2fcbf42SPeter Maydell parameter provides the random initialization vector used for 4844e2fcbf42SPeter Maydell encryption of this particular secret and should be a base64 4845e2fcbf42SPeter Maydell encrypted string of the 16-byte IV. 4846e2fcbf42SPeter Maydell 4847e2fcbf42SPeter Maydell The simplest (insecure) usage is to provide the secret inline 4848e2fcbf42SPeter Maydell 484909ce5f2dSPeter Maydell .. parsed-literal:: 4850e2fcbf42SPeter Maydell 4851e2fcbf42SPeter Maydell # |qemu_system| -object secret,id=sec0,data=letmein,format=raw 4852e2fcbf42SPeter Maydell 4853e2fcbf42SPeter Maydell The simplest secure usage is to provide the secret via a file 4854e2fcbf42SPeter Maydell 4855e2fcbf42SPeter Maydell # printf "letmein" > mypasswd.txt # QEMU\_SYSTEM\_MACRO -object 4856e2fcbf42SPeter Maydell secret,id=sec0,file=mypasswd.txt,format=raw 4857e2fcbf42SPeter Maydell 4858e2fcbf42SPeter Maydell For greater security, AES-256-CBC should be used. To illustrate 4859e2fcbf42SPeter Maydell usage, consider the openssl command line tool which can encrypt 4860e2fcbf42SPeter Maydell the data. Note that when encrypting, the plaintext must be 4861e2fcbf42SPeter Maydell padded to the cipher block size (32 bytes) using the standard 4862e2fcbf42SPeter Maydell PKCS#5/6 compatible padding algorithm. 4863e2fcbf42SPeter Maydell 4864e2fcbf42SPeter Maydell First a master key needs to be created in base64 encoding: 4865e2fcbf42SPeter Maydell 4866e2fcbf42SPeter Maydell :: 4867e2fcbf42SPeter Maydell 4868e2fcbf42SPeter Maydell # openssl rand -base64 32 > key.b64 4869e2fcbf42SPeter Maydell # KEY=$(base64 -d key.b64 | hexdump -v -e '/1 "%02X"') 4870e2fcbf42SPeter Maydell 4871e2fcbf42SPeter Maydell Each secret to be encrypted needs to have a random 4872e2fcbf42SPeter Maydell initialization vector generated. These do not need to be kept 4873e2fcbf42SPeter Maydell secret 4874e2fcbf42SPeter Maydell 4875e2fcbf42SPeter Maydell :: 4876e2fcbf42SPeter Maydell 4877e2fcbf42SPeter Maydell # openssl rand -base64 16 > iv.b64 4878e2fcbf42SPeter Maydell # IV=$(base64 -d iv.b64 | hexdump -v -e '/1 "%02X"') 4879e2fcbf42SPeter Maydell 4880e2fcbf42SPeter Maydell The secret to be defined can now be encrypted, in this case 4881e2fcbf42SPeter Maydell we're telling openssl to base64 encode the result, but it could 4882e2fcbf42SPeter Maydell be left as raw bytes if desired. 4883e2fcbf42SPeter Maydell 4884e2fcbf42SPeter Maydell :: 4885e2fcbf42SPeter Maydell 4886e2fcbf42SPeter Maydell # SECRET=$(printf "letmein" | 4887e2fcbf42SPeter Maydell openssl enc -aes-256-cbc -a -K $KEY -iv $IV) 4888e2fcbf42SPeter Maydell 4889e2fcbf42SPeter Maydell When launching QEMU, create a master secret pointing to 4890e2fcbf42SPeter Maydell ``key.b64`` and specify that to be used to decrypt the user 4891e2fcbf42SPeter Maydell password. Pass the contents of ``iv.b64`` to the second secret 4892e2fcbf42SPeter Maydell 489309ce5f2dSPeter Maydell .. parsed-literal:: 4894e2fcbf42SPeter Maydell 4895e2fcbf42SPeter Maydell # |qemu_system| \ 4896e2fcbf42SPeter Maydell -object secret,id=secmaster0,format=base64,file=key.b64 \ 4897e2fcbf42SPeter Maydell -object secret,id=sec0,keyid=secmaster0,format=base64,\ 4898e2fcbf42SPeter Maydell data=$SECRET,iv=$(<iv.b64) 4899e2fcbf42SPeter Maydell 4900e2fcbf42SPeter Maydell ``-object sev-guest,id=id,cbitpos=cbitpos,reduced-phys-bits=val,[sev-device=string,policy=policy,handle=handle,dh-cert-file=file,session-file=file]`` 4901e2fcbf42SPeter Maydell Create a Secure Encrypted Virtualization (SEV) guest object, 4902e2fcbf42SPeter Maydell which can be used to provide the guest memory encryption support 4903e2fcbf42SPeter Maydell on AMD processors. 4904e2fcbf42SPeter Maydell 4905e2fcbf42SPeter Maydell When memory encryption is enabled, one of the physical address 4906e2fcbf42SPeter Maydell bit (aka the C-bit) is utilized to mark if a memory page is 4907e2fcbf42SPeter Maydell protected. The ``cbitpos`` is used to provide the C-bit 4908e2fcbf42SPeter Maydell position. The C-bit position is Host family dependent hence user 4909e2fcbf42SPeter Maydell must provide this value. On EPYC, the value should be 47. 4910e2fcbf42SPeter Maydell 4911e2fcbf42SPeter Maydell When memory encryption is enabled, we loose certain bits in 4912e2fcbf42SPeter Maydell physical address space. The ``reduced-phys-bits`` is used to 4913e2fcbf42SPeter Maydell provide the number of bits we loose in physical address space. 4914e2fcbf42SPeter Maydell Similar to C-bit, the value is Host family dependent. On EPYC, 4915e2fcbf42SPeter Maydell the value should be 5. 4916e2fcbf42SPeter Maydell 4917e2fcbf42SPeter Maydell The ``sev-device`` provides the device file to use for 4918e2fcbf42SPeter Maydell communicating with the SEV firmware running inside AMD Secure 4919e2fcbf42SPeter Maydell Processor. The default device is '/dev/sev'. If hardware 4920e2fcbf42SPeter Maydell supports memory encryption then /dev/sev devices are created by 4921e2fcbf42SPeter Maydell CCP driver. 4922e2fcbf42SPeter Maydell 4923e2fcbf42SPeter Maydell The ``policy`` provides the guest policy to be enforced by the 4924e2fcbf42SPeter Maydell SEV firmware and restrict what configuration and operational 4925e2fcbf42SPeter Maydell commands can be performed on this guest by the hypervisor. The 4926e2fcbf42SPeter Maydell policy should be provided by the guest owner and is bound to the 4927e2fcbf42SPeter Maydell guest and cannot be changed throughout the lifetime of the 4928e2fcbf42SPeter Maydell guest. The default is 0. 4929e2fcbf42SPeter Maydell 4930e2fcbf42SPeter Maydell If guest ``policy`` allows sharing the key with another SEV 4931e2fcbf42SPeter Maydell guest then ``handle`` can be use to provide handle of the guest 4932e2fcbf42SPeter Maydell from which to share the key. 4933e2fcbf42SPeter Maydell 4934e2fcbf42SPeter Maydell The ``dh-cert-file`` and ``session-file`` provides the guest 4935e2fcbf42SPeter Maydell owner's Public Diffie-Hillman key defined in SEV spec. The PDH 4936e2fcbf42SPeter Maydell and session parameters are used for establishing a cryptographic 4937e2fcbf42SPeter Maydell session with the guest owner to negotiate keys used for 4938e2fcbf42SPeter Maydell attestation. The file must be encoded in base64. 4939e2fcbf42SPeter Maydell 4940e2fcbf42SPeter Maydell e.g to launch a SEV guest 4941e2fcbf42SPeter Maydell 494209ce5f2dSPeter Maydell .. parsed-literal:: 4943e2fcbf42SPeter Maydell 4944e2fcbf42SPeter Maydell # |qemu_system_x86| \ 4945e2fcbf42SPeter Maydell ...... 4946e2fcbf42SPeter Maydell -object sev-guest,id=sev0,cbitpos=47,reduced-phys-bits=5 \ 4947e2fcbf42SPeter Maydell -machine ...,memory-encryption=sev0 4948e2fcbf42SPeter Maydell ..... 4949e2fcbf42SPeter Maydell 4950e2fcbf42SPeter Maydell ``-object authz-simple,id=id,identity=string`` 4951e2fcbf42SPeter Maydell Create an authorization object that will control access to 4952e2fcbf42SPeter Maydell network services. 4953e2fcbf42SPeter Maydell 4954e2fcbf42SPeter Maydell The ``identity`` parameter is identifies the user and its format 4955e2fcbf42SPeter Maydell depends on the network service that authorization object is 4956e2fcbf42SPeter Maydell associated with. For authorizing based on TLS x509 certificates, 4957e2fcbf42SPeter Maydell the identity must be the x509 distinguished name. Note that care 4958e2fcbf42SPeter Maydell must be taken to escape any commas in the distinguished name. 4959e2fcbf42SPeter Maydell 4960e2fcbf42SPeter Maydell An example authorization object to validate a x509 distinguished 4961e2fcbf42SPeter Maydell name would look like: 4962e2fcbf42SPeter Maydell 496309ce5f2dSPeter Maydell .. parsed-literal:: 4964e2fcbf42SPeter Maydell 4965e2fcbf42SPeter Maydell # |qemu_system| \ 4966e2fcbf42SPeter Maydell ... 4967e2fcbf42SPeter Maydell -object 'authz-simple,id=auth0,identity=CN=laptop.example.com,,O=Example Org,,L=London,,ST=London,,C=GB' \ 4968e2fcbf42SPeter Maydell ... 4969e2fcbf42SPeter Maydell 4970e2fcbf42SPeter Maydell Note the use of quotes due to the x509 distinguished name 4971e2fcbf42SPeter Maydell containing whitespace, and escaping of ','. 4972e2fcbf42SPeter Maydell 4973e2fcbf42SPeter Maydell ``-object authz-listfile,id=id,filename=path,refresh=yes|no`` 4974e2fcbf42SPeter Maydell Create an authorization object that will control access to 4975e2fcbf42SPeter Maydell network services. 4976e2fcbf42SPeter Maydell 4977e2fcbf42SPeter Maydell The ``filename`` parameter is the fully qualified path to a file 4978e2fcbf42SPeter Maydell containing the access control list rules in JSON format. 4979e2fcbf42SPeter Maydell 4980e2fcbf42SPeter Maydell An example set of rules that match against SASL usernames might 4981e2fcbf42SPeter Maydell look like: 4982e2fcbf42SPeter Maydell 4983e2fcbf42SPeter Maydell :: 4984e2fcbf42SPeter Maydell 4985e2fcbf42SPeter Maydell { 4986e2fcbf42SPeter Maydell "rules": [ 4987e2fcbf42SPeter Maydell { "match": "fred", "policy": "allow", "format": "exact" }, 4988e2fcbf42SPeter Maydell { "match": "bob", "policy": "allow", "format": "exact" }, 4989e2fcbf42SPeter Maydell { "match": "danb", "policy": "deny", "format": "glob" }, 4990e2fcbf42SPeter Maydell { "match": "dan*", "policy": "allow", "format": "exact" }, 4991e2fcbf42SPeter Maydell ], 4992e2fcbf42SPeter Maydell "policy": "deny" 4993e2fcbf42SPeter Maydell } 4994e2fcbf42SPeter Maydell 4995e2fcbf42SPeter Maydell When checking access the object will iterate over all the rules 4996e2fcbf42SPeter Maydell and the first rule to match will have its ``policy`` value 4997e2fcbf42SPeter Maydell returned as the result. If no rules match, then the default 4998e2fcbf42SPeter Maydell ``policy`` value is returned. 4999e2fcbf42SPeter Maydell 5000e2fcbf42SPeter Maydell The rules can either be an exact string match, or they can use 5001e2fcbf42SPeter Maydell the simple UNIX glob pattern matching to allow wildcards to be 5002e2fcbf42SPeter Maydell used. 5003e2fcbf42SPeter Maydell 5004e2fcbf42SPeter Maydell If ``refresh`` is set to true the file will be monitored and 5005e2fcbf42SPeter Maydell automatically reloaded whenever its content changes. 5006e2fcbf42SPeter Maydell 5007e2fcbf42SPeter Maydell As with the ``authz-simple`` object, the format of the identity 5008e2fcbf42SPeter Maydell strings being matched depends on the network service, but is 5009e2fcbf42SPeter Maydell usually a TLS x509 distinguished name, or a SASL username. 5010e2fcbf42SPeter Maydell 5011e2fcbf42SPeter Maydell An example authorization object to validate a SASL username 5012e2fcbf42SPeter Maydell would look like: 5013e2fcbf42SPeter Maydell 501409ce5f2dSPeter Maydell .. parsed-literal:: 5015e2fcbf42SPeter Maydell 5016e2fcbf42SPeter Maydell # |qemu_system| \ 5017e2fcbf42SPeter Maydell ... 5018e2fcbf42SPeter Maydell -object authz-simple,id=auth0,filename=/etc/qemu/vnc-sasl.acl,refresh=yes 5019e2fcbf42SPeter Maydell ... 5020e2fcbf42SPeter Maydell 5021e2fcbf42SPeter Maydell ``-object authz-pam,id=id,service=string`` 5022e2fcbf42SPeter Maydell Create an authorization object that will control access to 5023e2fcbf42SPeter Maydell network services. 5024e2fcbf42SPeter Maydell 5025e2fcbf42SPeter Maydell The ``service`` parameter provides the name of a PAM service to 5026e2fcbf42SPeter Maydell use for authorization. It requires that a file 5027e2fcbf42SPeter Maydell ``/etc/pam.d/service`` exist to provide the configuration for 5028e2fcbf42SPeter Maydell the ``account`` subsystem. 5029e2fcbf42SPeter Maydell 5030e2fcbf42SPeter Maydell An example authorization object to validate a TLS x509 5031e2fcbf42SPeter Maydell distinguished name would look like: 5032e2fcbf42SPeter Maydell 503309ce5f2dSPeter Maydell .. parsed-literal:: 5034e2fcbf42SPeter Maydell 5035e2fcbf42SPeter Maydell # |qemu_system| \ 5036e2fcbf42SPeter Maydell ... 5037e2fcbf42SPeter Maydell -object authz-pam,id=auth0,service=qemu-vnc 5038e2fcbf42SPeter Maydell ... 5039e2fcbf42SPeter Maydell 5040e2fcbf42SPeter Maydell There would then be a corresponding config file for PAM at 5041e2fcbf42SPeter Maydell ``/etc/pam.d/qemu-vnc`` that contains: 5042e2fcbf42SPeter Maydell 5043e2fcbf42SPeter Maydell :: 5044e2fcbf42SPeter Maydell 5045e2fcbf42SPeter Maydell account requisite pam_listfile.so item=user sense=allow \ 5046e2fcbf42SPeter Maydell file=/etc/qemu/vnc.allow 5047e2fcbf42SPeter Maydell 5048e2fcbf42SPeter Maydell Finally the ``/etc/qemu/vnc.allow`` file would contain the list 5049e2fcbf42SPeter Maydell of x509 distingished names that are permitted access 5050e2fcbf42SPeter Maydell 5051e2fcbf42SPeter Maydell :: 5052e2fcbf42SPeter Maydell 5053e2fcbf42SPeter Maydell CN=laptop.example.com,O=Example Home,L=London,ST=London,C=GB 5054e2fcbf42SPeter Maydell 5055e2fcbf42SPeter Maydell ``-object iothread,id=id,poll-max-ns=poll-max-ns,poll-grow=poll-grow,poll-shrink=poll-shrink`` 5056e2fcbf42SPeter Maydell Creates a dedicated event loop thread that devices can be 5057e2fcbf42SPeter Maydell assigned to. This is known as an IOThread. By default device 5058e2fcbf42SPeter Maydell emulation happens in vCPU threads or the main event loop thread. 5059e2fcbf42SPeter Maydell This can become a scalability bottleneck. IOThreads allow device 5060e2fcbf42SPeter Maydell emulation and I/O to run on other host CPUs. 5061e2fcbf42SPeter Maydell 5062e2fcbf42SPeter Maydell The ``id`` parameter is a unique ID that will be used to 5063e2fcbf42SPeter Maydell reference this IOThread from ``-device ...,iothread=id``. 5064e2fcbf42SPeter Maydell Multiple devices can be assigned to an IOThread. Note that not 5065e2fcbf42SPeter Maydell all devices support an ``iothread`` parameter. 5066e2fcbf42SPeter Maydell 5067e2fcbf42SPeter Maydell The ``query-iothreads`` QMP command lists IOThreads and reports 5068e2fcbf42SPeter Maydell their thread IDs so that the user can configure host CPU 5069e2fcbf42SPeter Maydell pinning/affinity. 5070e2fcbf42SPeter Maydell 5071e2fcbf42SPeter Maydell IOThreads use an adaptive polling algorithm to reduce event loop 5072e2fcbf42SPeter Maydell latency. Instead of entering a blocking system call to monitor 5073e2fcbf42SPeter Maydell file descriptors and then pay the cost of being woken up when an 5074e2fcbf42SPeter Maydell event occurs, the polling algorithm spins waiting for events for 5075e2fcbf42SPeter Maydell a short time. The algorithm's default parameters are suitable 5076e2fcbf42SPeter Maydell for many cases but can be adjusted based on knowledge of the 5077e2fcbf42SPeter Maydell workload and/or host device latency. 5078e2fcbf42SPeter Maydell 5079e2fcbf42SPeter Maydell The ``poll-max-ns`` parameter is the maximum number of 5080e2fcbf42SPeter Maydell nanoseconds to busy wait for events. Polling can be disabled by 5081e2fcbf42SPeter Maydell setting this value to 0. 5082e2fcbf42SPeter Maydell 5083e2fcbf42SPeter Maydell The ``poll-grow`` parameter is the multiplier used to increase 5084e2fcbf42SPeter Maydell the polling time when the algorithm detects it is missing events 5085e2fcbf42SPeter Maydell due to not polling long enough. 5086e2fcbf42SPeter Maydell 5087e2fcbf42SPeter Maydell The ``poll-shrink`` parameter is the divisor used to decrease 5088e2fcbf42SPeter Maydell the polling time when the algorithm detects it is spending too 5089e2fcbf42SPeter Maydell long polling without encountering events. 5090e2fcbf42SPeter Maydell 5091e2fcbf42SPeter Maydell The polling parameters can be modified at run-time using the 5092e2fcbf42SPeter Maydell ``qom-set`` command (where ``iothread1`` is the IOThread's 5093e2fcbf42SPeter Maydell ``id``): 5094e2fcbf42SPeter Maydell 5095e2fcbf42SPeter Maydell :: 5096e2fcbf42SPeter Maydell 5097e2fcbf42SPeter Maydell (qemu) qom-set /objects/iothread1 poll-max-ns 100000 5098e2fcbf42SPeter MaydellERST 5099b9174d4fSDaniel P. Berrange 5100b9174d4fSDaniel P. Berrange 51013dbf2c7fSStefan WeilHXCOMM This is the last statement. Insert new options before this line! 5102