1HXCOMM See docs/devel/docs.rst for the format of this file. 2HXCOMM 3HXCOMM This file defines the contents of an array of HMPCommand structs 4HXCOMM which specify the name, behaviour and help text for HMP commands. 5HXCOMM Text between SRST and ERST is rST format documentation. 6HXCOMM HXCOMM can be used for comments, discarded from both rST and C. 7 8 9 { 10 .name = "help|?", 11 .args_type = "name:S?", 12 .params = "[cmd]", 13 .help = "show the help", 14 .cmd = hmp_help, 15 .flags = "p", 16 }, 17 18SRST 19``help`` or ``?`` [*cmd*] 20 Show the help for all commands or just for command *cmd*. 21ERST 22 23 { 24 .name = "commit", 25 .args_type = "device:B", 26 .params = "device|all", 27 .help = "commit changes to the disk images (if -snapshot is used) or backing files", 28 .cmd = hmp_commit, 29 }, 30 31SRST 32``commit`` 33 Commit changes to the disk images (if -snapshot is used) or backing files. 34 If the backing file is smaller than the snapshot, then the backing file 35 will be resized to be the same size as the snapshot. If the snapshot is 36 smaller than the backing file, the backing file will not be truncated. 37 If you want the backing file to match the size of the smaller snapshot, 38 you can safely truncate it yourself once the commit operation successfully 39 completes. 40ERST 41 42 { 43 .name = "quit|q", 44 .args_type = "", 45 .params = "", 46 .help = "quit the emulator", 47 .cmd = hmp_quit, 48 .flags = "p", 49 }, 50 51SRST 52``quit`` or ``q`` 53 Quit the emulator. 54ERST 55 56 { 57 .name = "exit_preconfig", 58 .args_type = "", 59 .params = "", 60 .help = "exit the preconfig state", 61 .cmd = hmp_exit_preconfig, 62 .flags = "p", 63 }, 64 65SRST 66``exit_preconfig`` 67 This command makes QEMU exit the preconfig state and proceed with 68 VM initialization using configuration data provided on the command line 69 and via the QMP monitor during the preconfig state. The command is only 70 available during the preconfig state (i.e. when the --preconfig command 71 line option was in use). 72ERST 73 74 { 75 .name = "block_resize", 76 .args_type = "device:B,size:o", 77 .params = "device size", 78 .help = "resize a block image", 79 .cmd = hmp_block_resize, 80 .coroutine = true, 81 .flags = "p", 82 }, 83 84SRST 85``block_resize`` 86 Resize a block image while a guest is running. Usually requires guest 87 action to see the updated size. Resize to a lower size is supported, 88 but should be used with extreme caution. Note that this command only 89 resizes image files, it can not resize block devices like LVM volumes. 90ERST 91 92 { 93 .name = "block_stream", 94 .args_type = "device:B,speed:o?,base:s?", 95 .params = "device [speed [base]]", 96 .help = "copy data from a backing file into a block device", 97 .cmd = hmp_block_stream, 98 .flags = "p", 99 }, 100 101SRST 102``block_stream`` 103 Copy data from a backing file into a block device. 104ERST 105 106 { 107 .name = "block_job_set_speed", 108 .args_type = "device:B,speed:o", 109 .params = "device speed", 110 .help = "set maximum speed for a background block operation", 111 .cmd = hmp_block_job_set_speed, 112 .flags = "p", 113 }, 114 115SRST 116``block_job_set_speed`` 117 Set maximum speed for a background block operation. 118ERST 119 120 { 121 .name = "block_job_cancel", 122 .args_type = "force:-f,device:B", 123 .params = "[-f] device", 124 .help = "stop an active background block operation (use -f" 125 "\n\t\t\t if you want to abort the operation immediately" 126 "\n\t\t\t instead of keep running until data is in sync)", 127 .cmd = hmp_block_job_cancel, 128 .flags = "p", 129 }, 130 131SRST 132``block_job_cancel`` 133 Stop an active background block operation (streaming, mirroring). 134ERST 135 136 { 137 .name = "block_job_complete", 138 .args_type = "device:B", 139 .params = "device", 140 .help = "stop an active background block operation", 141 .cmd = hmp_block_job_complete, 142 .flags = "p", 143 }, 144 145SRST 146``block_job_complete`` 147 Manually trigger completion of an active background block operation. 148 For mirroring, this will switch the device to the destination path. 149ERST 150 151 { 152 .name = "block_job_pause", 153 .args_type = "device:B", 154 .params = "device", 155 .help = "pause an active background block operation", 156 .cmd = hmp_block_job_pause, 157 .flags = "p", 158 }, 159 160SRST 161``block_job_pause`` 162 Pause an active block streaming operation. 163ERST 164 165 { 166 .name = "block_job_resume", 167 .args_type = "device:B", 168 .params = "device", 169 .help = "resume a paused background block operation", 170 .cmd = hmp_block_job_resume, 171 .flags = "p", 172 }, 173 174SRST 175``block_job_resume`` 176 Resume a paused block streaming operation. 177ERST 178 179 { 180 .name = "eject", 181 .args_type = "force:-f,device:B", 182 .params = "[-f] device", 183 .help = "eject a removable medium (use -f to force it)", 184 .cmd = hmp_eject, 185 }, 186 187SRST 188``eject [-f]`` *device* 189 Eject a removable medium (use -f to force it). 190ERST 191 192 { 193 .name = "drive_del", 194 .args_type = "id:B", 195 .params = "device", 196 .help = "remove host block device", 197 .cmd = hmp_drive_del, 198 }, 199 200SRST 201``drive_del`` *device* 202 Remove host block device. The result is that guest generated IO is no longer 203 submitted against the host device underlying the disk. Once a drive has 204 been deleted, the QEMU Block layer returns -EIO which results in IO 205 errors in the guest for applications that are reading/writing to the device. 206 These errors are always reported to the guest, regardless of the drive's error 207 actions (drive options rerror, werror). 208ERST 209 210 { 211 .name = "change", 212 .args_type = "device:B,force:-f,target:F,arg:s?,read-only-mode:s?", 213 .params = "device [-f] filename [format [read-only-mode]]", 214 .help = "change a removable medium, optional format, use -f to force the operation", 215 .cmd = hmp_change, 216 }, 217 218SRST 219``change`` *device* *setting* 220 Change the configuration of a device. 221 222 ``change`` *diskdevice* [-f] *filename* [*format* [*read-only-mode*]] 223 Change the medium for a removable disk device to point to *filename*. eg:: 224 225 (qemu) change ide1-cd0 /path/to/some.iso 226 227 ``-f`` 228 forces the operation even if the guest has locked the tray. 229 230 *format* is optional. 231 232 *read-only-mode* may be used to change the read-only status of the device. 233 It accepts the following values: 234 235 retain 236 Retains the current status; this is the default. 237 238 read-only 239 Makes the device read-only. 240 241 read-write 242 Makes the device writable. 243 244 ``change vnc password`` [*password*] 245 246 Change the password associated with the VNC server. If the new password 247 is not supplied, the monitor will prompt for it to be entered. VNC 248 passwords are only significant up to 8 letters. eg:: 249 250 (qemu) change vnc password 251 Password: ******** 252 253ERST 254 255#ifdef CONFIG_PIXMAN 256 { 257 .name = "screendump", 258 .args_type = "filename:F,format:-fs,device:s?,head:i?", 259 .params = "filename [-f format] [device [head]]", 260 .help = "save screen from head 'head' of display device 'device'" 261 "in specified format 'format' as image 'filename'." 262 "Currently only 'png' and 'ppm' formats are supported.", 263 .cmd = hmp_screendump, 264 .coroutine = true, 265 }, 266 267SRST 268``screendump`` *filename* 269 Save screen into PPM image *filename*. 270ERST 271#endif 272 273 { 274 .name = "logfile", 275 .args_type = "filename:F", 276 .params = "filename", 277 .help = "output logs to 'filename'", 278 .cmd = hmp_logfile, 279 }, 280 281SRST 282``logfile`` *filename* 283 Output logs to *filename*. 284ERST 285 286 { 287 .name = "trace-event", 288 .args_type = "name:s,option:b,vcpu:i?", 289 .params = "name on|off [vcpu]", 290 .help = "changes status of a specific trace event " 291 "(vcpu: vCPU to set, default is all)", 292 .cmd = hmp_trace_event, 293 .command_completion = trace_event_completion, 294 }, 295 296SRST 297``trace-event`` 298 changes status of a trace event 299ERST 300 301#if defined(CONFIG_TRACE_SIMPLE) 302 { 303 .name = "trace-file", 304 .args_type = "op:s?,arg:F?", 305 .params = "on|off|flush|set [arg]", 306 .help = "open, close, or flush trace file, or set a new file name", 307 .cmd = hmp_trace_file, 308 }, 309 310SRST 311``trace-file on|off|flush`` 312 Open, close, or flush the trace file. If no argument is given, the 313 status of the trace file is displayed. 314ERST 315#endif 316 317 { 318 .name = "log", 319 .args_type = "items:s", 320 .params = "item1[,...]", 321 .help = "activate logging of the specified items", 322 .cmd = hmp_log, 323 }, 324 325SRST 326``log`` *item1*\ [,...] 327 Activate logging of the specified items. 328ERST 329 330 { 331 .name = "savevm", 332 .args_type = "name:s?", 333 .params = "tag", 334 .help = "save a VM snapshot. If no tag is provided, a new snapshot is created", 335 .cmd = hmp_savevm, 336 }, 337 338SRST 339``savevm`` *tag* 340 Create a snapshot of the whole virtual machine. If *tag* is 341 provided, it is used as human readable identifier. If there is already 342 a snapshot with the same tag, it is replaced. More info at 343 :ref:`vm_005fsnapshots`. 344 345 Since 4.0, savevm stopped allowing the snapshot id to be set, accepting 346 only *tag* as parameter. 347ERST 348 349 { 350 .name = "loadvm", 351 .args_type = "name:s", 352 .params = "tag", 353 .help = "restore a VM snapshot from its tag", 354 .cmd = hmp_loadvm, 355 .command_completion = loadvm_completion, 356 }, 357 358SRST 359``loadvm`` *tag* 360 Set the whole virtual machine to the snapshot identified by the tag 361 *tag*. 362 363 Since 4.0, loadvm stopped accepting snapshot id as parameter. 364ERST 365 366 { 367 .name = "delvm", 368 .args_type = "name:s", 369 .params = "tag", 370 .help = "delete a VM snapshot from its tag", 371 .cmd = hmp_delvm, 372 .command_completion = delvm_completion, 373 }, 374 375SRST 376``delvm`` *tag* 377 Delete the snapshot identified by *tag*. 378 379 Since 4.0, delvm stopped deleting snapshots by snapshot id, accepting 380 only *tag* as parameter. 381ERST 382 383 { 384 .name = "one-insn-per-tb", 385 .args_type = "option:s?", 386 .params = "[on|off]", 387 .help = "run emulation with one guest instruction per translation block", 388 .cmd = hmp_one_insn_per_tb, 389 }, 390 391SRST 392``one-insn-per-tb [off]`` 393 Run the emulation with one guest instruction per translation block. 394 This slows down emulation a lot, but can be useful in some situations, 395 such as when trying to analyse the logs produced by the ``-d`` option. 396 This only has an effect when using TCG, not with KVM or other accelerators. 397 398 If called with option off, the emulation returns to normal mode. 399ERST 400 401 { 402 .name = "stop|s", 403 .args_type = "", 404 .params = "", 405 .help = "stop emulation", 406 .cmd = hmp_stop, 407 }, 408 409SRST 410``stop`` or ``s`` 411 Stop emulation. 412ERST 413 414 { 415 .name = "cont|c", 416 .args_type = "", 417 .params = "", 418 .help = "resume emulation", 419 .cmd = hmp_cont, 420 }, 421 422SRST 423``cont`` or ``c`` 424 Resume emulation. 425ERST 426 427 { 428 .name = "system_wakeup", 429 .args_type = "", 430 .params = "", 431 .help = "wakeup guest from suspend", 432 .cmd = hmp_system_wakeup, 433 }, 434 435SRST 436``system_wakeup`` 437 Wakeup guest from suspend. 438ERST 439 440 { 441 .name = "gdbserver", 442 .args_type = "device:s?", 443 .params = "[device]", 444 .help = "start gdbserver on given device (default 'tcp::1234'), stop with 'none'", 445 .cmd = hmp_gdbserver, 446 }, 447 448SRST 449``gdbserver`` [*port*] 450 Start gdbserver session (default *port*\=1234) 451ERST 452 453 { 454 .name = "x", 455 .args_type = "fmt:/,addr:l", 456 .params = "/fmt addr", 457 .help = "virtual memory dump starting at 'addr'", 458 .cmd = hmp_memory_dump, 459 }, 460 461SRST 462``x/``\ *fmt* *addr* 463 Virtual memory dump starting at *addr*. 464ERST 465 466 { 467 .name = "xp", 468 .args_type = "fmt:/,addr:l", 469 .params = "/fmt addr", 470 .help = "physical memory dump starting at 'addr'", 471 .cmd = hmp_physical_memory_dump, 472 }, 473 474SRST 475``xp /``\ *fmt* *addr* 476 Physical memory dump starting at *addr*. 477 478 *fmt* is a format which tells the command how to format the 479 data. Its syntax is: ``/{count}{format}{size}`` 480 481 *count* 482 is the number of items to be dumped. 483 *format* 484 can be x (hex), d (signed decimal), u (unsigned decimal), o (octal), 485 c (char) or i (asm instruction). 486 *size* 487 can be b (8 bits), h (16 bits), w (32 bits) or g (64 bits). On x86, 488 ``h`` or ``w`` can be specified with the ``i`` format to 489 respectively select 16 or 32 bit code instruction size. 490 491 Examples: 492 493 Dump 10 instructions at the current instruction pointer:: 494 495 (qemu) x/10i $eip 496 0x90107063: ret 497 0x90107064: sti 498 0x90107065: lea 0x0(%esi,1),%esi 499 0x90107069: lea 0x0(%edi,1),%edi 500 0x90107070: ret 501 0x90107071: jmp 0x90107080 502 0x90107073: nop 503 0x90107074: nop 504 0x90107075: nop 505 0x90107076: nop 506 507 Dump 80 16 bit values at the start of the video memory:: 508 509 (qemu) xp/80hx 0xb8000 510 0x000b8000: 0x0b50 0x0b6c 0x0b65 0x0b78 0x0b38 0x0b36 0x0b2f 0x0b42 511 0x000b8010: 0x0b6f 0x0b63 0x0b68 0x0b73 0x0b20 0x0b56 0x0b47 0x0b41 512 0x000b8020: 0x0b42 0x0b69 0x0b6f 0x0b73 0x0b20 0x0b63 0x0b75 0x0b72 513 0x000b8030: 0x0b72 0x0b65 0x0b6e 0x0b74 0x0b2d 0x0b63 0x0b76 0x0b73 514 0x000b8040: 0x0b20 0x0b30 0x0b35 0x0b20 0x0b4e 0x0b6f 0x0b76 0x0b20 515 0x000b8050: 0x0b32 0x0b30 0x0b30 0x0b33 0x0720 0x0720 0x0720 0x0720 516 0x000b8060: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 517 0x000b8070: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 518 0x000b8080: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 519 0x000b8090: 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 0x0720 520 521ERST 522 523 { 524 .name = "gpa2hva", 525 .args_type = "addr:l", 526 .params = "addr", 527 .help = "print the host virtual address corresponding to a guest physical address", 528 .cmd = hmp_gpa2hva, 529 }, 530 531SRST 532``gpa2hva`` *addr* 533 Print the host virtual address at which the guest's physical address *addr* 534 is mapped. 535ERST 536 537#ifdef CONFIG_LINUX 538 { 539 .name = "gpa2hpa", 540 .args_type = "addr:l", 541 .params = "addr", 542 .help = "print the host physical address corresponding to a guest physical address", 543 .cmd = hmp_gpa2hpa, 544 }, 545#endif 546 547SRST 548``gpa2hpa`` *addr* 549 Print the host physical address at which the guest's physical address *addr* 550 is mapped. 551ERST 552 553 { 554 .name = "gva2gpa", 555 .args_type = "addr:l", 556 .params = "addr", 557 .help = "print the guest physical address corresponding to a guest virtual address", 558 .cmd = hmp_gva2gpa, 559 }, 560 561SRST 562``gva2gpa`` *addr* 563 Print the guest physical address at which the guest's virtual address *addr* 564 is mapped based on the mapping for the current CPU. 565ERST 566 567 { 568 .name = "print|p", 569 .args_type = "fmt:/,val:l", 570 .params = "/fmt expr", 571 .help = "print expression value (use $reg for CPU register access)", 572 .cmd = hmp_print, 573 }, 574 575SRST 576``print`` or ``p/``\ *fmt* *expr* 577 Print expression value. Only the *format* part of *fmt* is 578 used. 579ERST 580 581 { 582 .name = "i", 583 .args_type = "fmt:/,addr:i,index:i.", 584 .params = "/fmt addr", 585 .help = "I/O port read", 586 .cmd = hmp_ioport_read, 587 }, 588 589SRST 590``i/``\ *fmt* *addr* [.\ *index*\ ] 591 Read I/O port. 592ERST 593 594 { 595 .name = "o", 596 .args_type = "fmt:/,addr:i,val:i", 597 .params = "/fmt addr value", 598 .help = "I/O port write", 599 .cmd = hmp_ioport_write, 600 }, 601 602SRST 603``o/``\ *fmt* *addr* *val* 604 Write to I/O port. 605ERST 606 607 { 608 .name = "sendkey", 609 .args_type = "keys:s,hold-time:i?", 610 .params = "keys [hold_ms]", 611 .help = "send keys to the VM (e.g. 'sendkey ctrl-alt-f1', default hold time=100 ms)", 612 .cmd = hmp_sendkey, 613 .command_completion = sendkey_completion, 614 }, 615 616SRST 617``sendkey`` *keys* 618 Send *keys* to the guest. *keys* could be the name of the 619 key or the raw value in hexadecimal format. Use ``-`` to press 620 several keys simultaneously. Example:: 621 622 sendkey ctrl-alt-f1 623 624 This command is useful to send keys that your graphical user interface 625 intercepts at low level, such as ``ctrl-alt-f1`` in X Window. 626ERST 627 { 628 .name = "sync-profile", 629 .args_type = "op:s?", 630 .params = "[on|off|reset]", 631 .help = "enable, disable or reset synchronization profiling. " 632 "With no arguments, prints whether profiling is on or off.", 633 .cmd = hmp_sync_profile, 634 }, 635 636SRST 637``sync-profile [on|off|reset]`` 638 Enable, disable or reset synchronization profiling. With no arguments, prints 639 whether profiling is on or off. 640ERST 641 642 { 643 .name = "system_reset", 644 .args_type = "", 645 .params = "", 646 .help = "reset the system", 647 .cmd = hmp_system_reset, 648 }, 649 650SRST 651``system_reset`` 652 Reset the system. 653ERST 654 655 { 656 .name = "system_powerdown", 657 .args_type = "", 658 .params = "", 659 .help = "send system power down event", 660 .cmd = hmp_system_powerdown, 661 }, 662 663SRST 664``system_powerdown`` 665 Power down the system (if supported). 666ERST 667 668 { 669 .name = "sum", 670 .args_type = "start:i,size:i", 671 .params = "addr size", 672 .help = "compute the checksum of a memory region", 673 .cmd = hmp_sum, 674 }, 675 676SRST 677``sum`` *addr* *size* 678 Compute the checksum of a memory region. 679ERST 680 681 { 682 .name = "device_add", 683 .args_type = "device:O", 684 .params = "driver[,prop=value][,...]", 685 .help = "add device, like -device on the command line", 686 .cmd = hmp_device_add, 687 .command_completion = device_add_completion, 688 }, 689 690SRST 691``device_add`` *config* 692 Add device. 693ERST 694 695 { 696 .name = "device_del", 697 .args_type = "id:s", 698 .params = "device", 699 .help = "remove device", 700 .cmd = hmp_device_del, 701 .command_completion = device_del_completion, 702 }, 703 704SRST 705``device_del`` *id* 706 Remove device *id*. *id* may be a short ID 707 or a QOM object path. 708ERST 709 710 { 711 .name = "cpu", 712 .args_type = "index:i", 713 .params = "index", 714 .help = "set the default CPU", 715 .cmd = hmp_cpu, 716 }, 717 718SRST 719``cpu`` *index* 720 Set the default CPU. 721ERST 722 723 { 724 .name = "mouse_move", 725 .args_type = "dx_str:s,dy_str:s,dz_str:s?", 726 .params = "dx dy [dz]", 727 .help = "send mouse move events", 728 .cmd = hmp_mouse_move, 729 }, 730 731SRST 732``mouse_move`` *dx* *dy* [*dz*] 733 Move the active mouse to the specified coordinates *dx* *dy* 734 with optional scroll axis *dz*. 735ERST 736 737 { 738 .name = "mouse_button", 739 .args_type = "button_state:i", 740 .params = "state", 741 .help = "change mouse button state (1=L, 2=M, 4=R)", 742 .cmd = hmp_mouse_button, 743 }, 744 745SRST 746``mouse_button`` *val* 747 Change the active mouse button state *val* (1=L, 2=M, 4=R). 748ERST 749 750 { 751 .name = "mouse_set", 752 .args_type = "index:i", 753 .params = "index", 754 .help = "set which mouse device receives events", 755 .cmd = hmp_mouse_set, 756 }, 757 758SRST 759``mouse_set`` *index* 760 Set which mouse device receives events at given *index*, index 761 can be obtained with:: 762 763 info mice 764 765ERST 766 767 { 768 .name = "wavcapture", 769 .args_type = "path:F,audiodev:s,freq:i?,bits:i?,nchannels:i?", 770 .params = "path audiodev [frequency [bits [channels]]]", 771 .help = "capture audio to a wave file (default frequency=44100 bits=16 channels=2)", 772 .cmd = hmp_wavcapture, 773 }, 774SRST 775``wavcapture`` *filename* *audiodev* [*frequency* [*bits* [*channels*]]] 776 Capture audio into *filename* from *audiodev*, using sample rate 777 *frequency* bits per sample *bits* and number of channels 778 *channels*. 779 780 Defaults: 781 782 - Sample rate = 44100 Hz - CD quality 783 - Bits = 16 784 - Number of channels = 2 - Stereo 785ERST 786 787 { 788 .name = "stopcapture", 789 .args_type = "n:i", 790 .params = "capture index", 791 .help = "stop capture", 792 .cmd = hmp_stopcapture, 793 }, 794SRST 795``stopcapture`` *index* 796 Stop capture with a given *index*, index can be obtained with:: 797 798 info capture 799 800ERST 801 802 { 803 .name = "memsave", 804 .args_type = "val:l,size:i,filename:s", 805 .params = "addr size file", 806 .help = "save to disk virtual memory dump starting at 'addr' of size 'size'", 807 .cmd = hmp_memsave, 808 }, 809 810SRST 811``memsave`` *addr* *size* *file* 812 save to disk virtual memory dump starting at *addr* of size *size*. 813ERST 814 815 { 816 .name = "pmemsave", 817 .args_type = "val:l,size:i,filename:s", 818 .params = "addr size file", 819 .help = "save to disk physical memory dump starting at 'addr' of size 'size'", 820 .cmd = hmp_pmemsave, 821 }, 822 823SRST 824``pmemsave`` *addr* *size* *file* 825 save to disk physical memory dump starting at *addr* of size *size*. 826ERST 827 828 { 829 .name = "boot_set", 830 .args_type = "bootdevice:s", 831 .params = "bootdevice", 832 .help = "define new values for the boot device list", 833 .cmd = hmp_boot_set, 834 }, 835 836SRST 837``boot_set`` *bootdevicelist* 838 Define new values for the boot device list. Those values will override 839 the values specified on the command line through the ``-boot`` option. 840 841 The values that can be specified here depend on the machine type, but are 842 the same that can be specified in the ``-boot`` command line option. 843ERST 844 845 { 846 .name = "nmi", 847 .args_type = "", 848 .params = "", 849 .help = "inject an NMI", 850 .cmd = hmp_nmi, 851 }, 852SRST 853``nmi`` *cpu* 854 Inject an NMI on the default CPU (x86/s390) or all CPUs (ppc64). 855ERST 856 857 { 858 .name = "ringbuf_write", 859 .args_type = "device:s,data:s", 860 .params = "device data", 861 .help = "Write to a ring buffer character device", 862 .cmd = hmp_ringbuf_write, 863 .command_completion = ringbuf_write_completion, 864 }, 865 866SRST 867``ringbuf_write`` *device* *data* 868 Write *data* to ring buffer character device *device*. 869 *data* must be a UTF-8 string. 870ERST 871 872 { 873 .name = "ringbuf_read", 874 .args_type = "device:s,size:i", 875 .params = "device size", 876 .help = "Read from a ring buffer character device", 877 .cmd = hmp_ringbuf_read, 878 .command_completion = ringbuf_write_completion, 879 }, 880 881SRST 882``ringbuf_read`` *device* 883 Read and print up to *size* bytes from ring buffer character 884 device *device*. 885 Certain non-printable characters are printed ``\uXXXX``, where ``XXXX`` is the 886 character code in hexadecimal. Character ``\`` is printed ``\\``. 887 Bug: can screw up when the buffer contains invalid UTF-8 sequences, 888 NUL characters, after the ring buffer lost data, and when reading 889 stops because the size limit is reached. 890ERST 891 892 { 893 .name = "announce_self", 894 .args_type = "interfaces:s?,id:s?", 895 .params = "[interfaces] [id]", 896 .help = "Trigger GARP/RARP announcements", 897 .cmd = hmp_announce_self, 898 }, 899 900SRST 901``announce_self`` 902 Trigger a round of GARP/RARP broadcasts; this is useful for explicitly 903 updating the network infrastructure after a reconfiguration or some forms 904 of migration. The timings of the round are set by the migration announce 905 parameters. An optional comma separated *interfaces* list restricts the 906 announce to the named set of interfaces. An optional *id* can be used to 907 start a separate announce timer and to change the parameters of it later. 908ERST 909 910 { 911 .name = "migrate", 912 .args_type = "detach:-d,resume:-r,uri:s", 913 .params = "[-d] [-r] uri", 914 .help = "migrate to URI (using -d to not wait for completion)" 915 "\n\t\t\t -r to resume a paused postcopy migration", 916 .cmd = hmp_migrate, 917 }, 918 919 920SRST 921``migrate [-d] [-r]`` *uri* 922 Migrate the VM to *uri*. 923 924 ``-d`` 925 Start the migration process, but do not wait for its completion. To 926 query an ongoing migration process, use "info migrate". 927 ``-r`` 928 Resume a paused postcopy migration. 929ERST 930 931 { 932 .name = "migrate_cancel", 933 .args_type = "", 934 .params = "", 935 .help = "cancel the current VM migration", 936 .cmd = hmp_migrate_cancel, 937 }, 938 939SRST 940``migrate_cancel`` 941 Cancel the current VM migration. 942ERST 943 944 { 945 .name = "migrate_continue", 946 .args_type = "state:s", 947 .params = "state", 948 .help = "Continue migration from the given paused state", 949 .cmd = hmp_migrate_continue, 950 }, 951SRST 952``migrate_continue`` *state* 953 Continue migration from the paused state *state* 954ERST 955 956 { 957 .name = "migrate_incoming", 958 .args_type = "uri:s", 959 .params = "uri", 960 .help = "Continue an incoming migration from an -incoming defer", 961 .cmd = hmp_migrate_incoming, 962 }, 963 964SRST 965``migrate_incoming`` *uri* 966 Continue an incoming migration using the *uri* (that has the same syntax 967 as the ``-incoming`` option). 968ERST 969 970 { 971 .name = "migrate_recover", 972 .args_type = "uri:s", 973 .params = "uri", 974 .help = "Continue a paused incoming postcopy migration", 975 .cmd = hmp_migrate_recover, 976 }, 977 978SRST 979``migrate_recover`` *uri* 980 Continue a paused incoming postcopy migration using the *uri*. 981ERST 982 983 { 984 .name = "migrate_pause", 985 .args_type = "", 986 .params = "", 987 .help = "Pause an ongoing migration (postcopy-only)", 988 .cmd = hmp_migrate_pause, 989 }, 990 991SRST 992``migrate_pause`` 993 Pause an ongoing migration. Currently it only supports postcopy. 994ERST 995 996 { 997 .name = "migrate_set_capability", 998 .args_type = "capability:s,state:b", 999 .params = "capability state", 1000 .help = "Enable/Disable the usage of a capability for migration", 1001 .cmd = hmp_migrate_set_capability, 1002 .command_completion = migrate_set_capability_completion, 1003 }, 1004 1005SRST 1006``migrate_set_capability`` *capability* *state* 1007 Enable/Disable the usage of a capability *capability* for migration. 1008ERST 1009 1010 { 1011 .name = "migrate_set_parameter", 1012 .args_type = "parameter:s,value:s", 1013 .params = "parameter value", 1014 .help = "Set the parameter for migration", 1015 .cmd = hmp_migrate_set_parameter, 1016 .command_completion = migrate_set_parameter_completion, 1017 }, 1018 1019SRST 1020``migrate_set_parameter`` *parameter* *value* 1021 Set the parameter *parameter* for migration. 1022ERST 1023 1024 { 1025 .name = "migrate_start_postcopy", 1026 .args_type = "", 1027 .params = "", 1028 .help = "Followup to a migration command to switch the migration" 1029 " to postcopy mode. The postcopy-ram capability must " 1030 "be set on both source and destination before the " 1031 "original migration command .", 1032 .cmd = hmp_migrate_start_postcopy, 1033 }, 1034 1035SRST 1036``migrate_start_postcopy`` 1037 Switch in-progress migration to postcopy mode. Ignored after the end of 1038 migration (or once already in postcopy). 1039ERST 1040 1041#ifdef CONFIG_REPLICATION 1042 { 1043 .name = "x_colo_lost_heartbeat", 1044 .args_type = "", 1045 .params = "", 1046 .help = "Tell COLO that heartbeat is lost,\n\t\t\t" 1047 "a failover or takeover is needed.", 1048 .cmd = hmp_x_colo_lost_heartbeat, 1049 }, 1050#endif 1051 1052SRST 1053``x_colo_lost_heartbeat`` 1054 Tell COLO that heartbeat is lost, a failover or takeover is needed. 1055ERST 1056 1057 { 1058 .name = "client_migrate_info", 1059 .args_type = "protocol:s,hostname:s,port:i?,tls-port:i?,cert-subject:s?", 1060 .params = "protocol hostname port tls-port cert-subject", 1061 .help = "set migration information for remote display", 1062 .cmd = hmp_client_migrate_info, 1063 }, 1064 1065SRST 1066``client_migrate_info`` *protocol* *hostname* *port* *tls-port* *cert-subject* 1067 Set migration information for remote display. This makes the server 1068 ask the client to automatically reconnect using the new parameters 1069 once migration finished successfully. Only implemented for SPICE. 1070ERST 1071 1072 { 1073 .name = "dump-guest-memory", 1074 .args_type = "paging:-p,detach:-d,windmp:-w,zlib:-z,lzo:-l,snappy:-s,raw:-R,filename:F,begin:l?,length:l?", 1075 .params = "[-p] [-d] [-z|-l|-s|-w] [-R] filename [begin length]", 1076 .help = "dump guest memory into file 'filename'.\n\t\t\t" 1077 "-p: do paging to get guest's memory mapping.\n\t\t\t" 1078 "-d: return immediately (do not wait for completion).\n\t\t\t" 1079 "-z: dump in kdump-compressed format, with zlib compression.\n\t\t\t" 1080 "-l: dump in kdump-compressed format, with lzo compression.\n\t\t\t" 1081 "-s: dump in kdump-compressed format, with snappy compression.\n\t\t\t" 1082 "-R: when using kdump (-z, -l, -s), use raw rather than makedumpfile-flattened\n\t\t\t" 1083 " format\n\t\t\t" 1084 "-w: dump in Windows crashdump format (can be used instead of ELF-dump converting),\n\t\t\t" 1085 " for Windows x86 and x64 guests with vmcoreinfo driver only.\n\t\t\t" 1086 "begin: the starting physical address.\n\t\t\t" 1087 "length: the memory size, in bytes.", 1088 .cmd = hmp_dump_guest_memory, 1089 }, 1090 1091SRST 1092``dump-guest-memory [-p]`` *filename* *begin* *length* 1093 \ 1094``dump-guest-memory [-z|-l|-s|-w]`` *filename* 1095 Dump guest memory to *protocol*. The file can be processed with crash or 1096 gdb. Without ``-z|-l|-s|-w``, the dump format is ELF. 1097 1098 ``-p`` 1099 do paging to get guest's memory mapping. 1100 ``-z`` 1101 dump in kdump-compressed format, with zlib compression. 1102 ``-l`` 1103 dump in kdump-compressed format, with lzo compression. 1104 ``-s`` 1105 dump in kdump-compressed format, with snappy compression. 1106 ``-R`` 1107 when using kdump (-z, -l, -s), use raw rather than makedumpfile-flattened 1108 format 1109 ``-w`` 1110 dump in Windows crashdump format (can be used instead of ELF-dump converting), 1111 for Windows x64 guests with vmcoreinfo driver only 1112 *filename* 1113 dump file name. 1114 *begin* 1115 the starting physical address. It's optional, and should be 1116 specified together with *length*. 1117 *length* 1118 the memory size, in bytes. It's optional, and should be specified 1119 together with *begin*. 1120 1121ERST 1122 1123#if defined(TARGET_S390X) 1124 { 1125 .name = "dump-skeys", 1126 .args_type = "filename:F", 1127 .params = "", 1128 .help = "Save guest storage keys into file 'filename'.\n", 1129 .cmd = hmp_dump_skeys, 1130 }, 1131#endif 1132 1133SRST 1134``dump-skeys`` *filename* 1135 Save guest storage keys to a file. 1136ERST 1137 1138#if defined(TARGET_S390X) 1139 { 1140 .name = "migration_mode", 1141 .args_type = "mode:i", 1142 .params = "mode", 1143 .help = "Enables or disables migration mode\n", 1144 .cmd = hmp_migrationmode, 1145 }, 1146#endif 1147 1148SRST 1149``migration_mode`` *mode* 1150 Enables or disables migration mode. 1151ERST 1152 1153 { 1154 .name = "snapshot_blkdev", 1155 .args_type = "reuse:-n,device:B,snapshot-file:s?,format:s?", 1156 .params = "[-n] device [new-image-file] [format]", 1157 .help = "initiates a live snapshot\n\t\t\t" 1158 "of device. If a new image file is specified, the\n\t\t\t" 1159 "new image file will become the new root image.\n\t\t\t" 1160 "If format is specified, the snapshot file will\n\t\t\t" 1161 "be created in that format.\n\t\t\t" 1162 "The default format is qcow2. The -n flag requests QEMU\n\t\t\t" 1163 "to reuse the image found in new-image-file, instead of\n\t\t\t" 1164 "recreating it from scratch.", 1165 .cmd = hmp_snapshot_blkdev, 1166 }, 1167 1168SRST 1169``snapshot_blkdev`` 1170 Snapshot device, using snapshot file as target if provided 1171ERST 1172 1173 { 1174 .name = "snapshot_blkdev_internal", 1175 .args_type = "device:B,name:s", 1176 .params = "device name", 1177 .help = "take an internal snapshot of device.\n\t\t\t" 1178 "The format of the image used by device must\n\t\t\t" 1179 "support it, such as qcow2.\n\t\t\t", 1180 .cmd = hmp_snapshot_blkdev_internal, 1181 }, 1182 1183SRST 1184``snapshot_blkdev_internal`` 1185 Take an internal snapshot on device if it support 1186ERST 1187 1188 { 1189 .name = "snapshot_delete_blkdev_internal", 1190 .args_type = "device:B,name:s,id:s?", 1191 .params = "device name [id]", 1192 .help = "delete an internal snapshot of device.\n\t\t\t" 1193 "If id is specified, qemu will try delete\n\t\t\t" 1194 "the snapshot matching both id and name.\n\t\t\t" 1195 "The format of the image used by device must\n\t\t\t" 1196 "support it, such as qcow2.\n\t\t\t", 1197 .cmd = hmp_snapshot_delete_blkdev_internal, 1198 }, 1199 1200SRST 1201``snapshot_delete_blkdev_internal`` 1202 Delete an internal snapshot on device if it support 1203ERST 1204 1205 { 1206 .name = "drive_mirror", 1207 .args_type = "reuse:-n,full:-f,device:B,target:s,format:s?", 1208 .params = "[-n] [-f] device target [format]", 1209 .help = "initiates live storage\n\t\t\t" 1210 "migration for a device. The device's contents are\n\t\t\t" 1211 "copied to the new image file, including data that\n\t\t\t" 1212 "is written after the command is started.\n\t\t\t" 1213 "The -n flag requests QEMU to reuse the image found\n\t\t\t" 1214 "in new-image-file, instead of recreating it from scratch.\n\t\t\t" 1215 "The -f flag requests QEMU to copy the whole disk,\n\t\t\t" 1216 "so that the result does not need a backing file.\n\t\t\t", 1217 .cmd = hmp_drive_mirror, 1218 }, 1219SRST 1220``drive_mirror`` 1221 Start mirroring a block device's writes to a new destination, 1222 using the specified target. 1223ERST 1224 1225 { 1226 .name = "drive_backup", 1227 .args_type = "reuse:-n,full:-f,compress:-c,device:B,target:s,format:s?", 1228 .params = "[-n] [-f] [-c] device target [format]", 1229 .help = "initiates a point-in-time\n\t\t\t" 1230 "copy for a device. The device's contents are\n\t\t\t" 1231 "copied to the new image file, excluding data that\n\t\t\t" 1232 "is written after the command is started.\n\t\t\t" 1233 "The -n flag requests QEMU to reuse the image found\n\t\t\t" 1234 "in new-image-file, instead of recreating it from scratch.\n\t\t\t" 1235 "The -f flag requests QEMU to copy the whole disk,\n\t\t\t" 1236 "so that the result does not need a backing file.\n\t\t\t" 1237 "The -c flag requests QEMU to compress backup data\n\t\t\t" 1238 "(if the target format supports it).\n\t\t\t", 1239 .cmd = hmp_drive_backup, 1240 }, 1241SRST 1242``drive_backup`` 1243 Start a point-in-time copy of a block device to a specified target. 1244ERST 1245 1246 { 1247 .name = "drive_add", 1248 .args_type = "node:-n,pci_addr:s,opts:s", 1249 .params = "[-n] [[<domain>:]<bus>:]<slot>\n" 1250 "[file=file][,if=type][,bus=n]\n" 1251 "[,unit=m][,media=d][,index=i]\n" 1252 "[,snapshot=on|off][,cache=on|off]\n" 1253 "[,readonly=on|off][,copy-on-read=on|off]", 1254 .help = "add drive to PCI storage controller", 1255 .cmd = hmp_drive_add, 1256 }, 1257 1258SRST 1259``drive_add`` 1260 Add drive to PCI storage controller. 1261ERST 1262 1263 { 1264 .name = "pcie_aer_inject_error", 1265 .args_type = "advisory_non_fatal:-a,correctable:-c," 1266 "id:s,error_status:s," 1267 "header0:i?,header1:i?,header2:i?,header3:i?," 1268 "prefix0:i?,prefix1:i?,prefix2:i?,prefix3:i?", 1269 .params = "[-a] [-c] id " 1270 "<error_status> [<tlp header> [<tlp header prefix>]]", 1271 .help = "inject pcie aer error\n\t\t\t" 1272 " -a for advisory non fatal error\n\t\t\t" 1273 " -c for correctable error\n\t\t\t" 1274 "<id> = qdev device id\n\t\t\t" 1275 "<error_status> = error string or 32bit\n\t\t\t" 1276 "<tlp header> = 32bit x 4\n\t\t\t" 1277 "<tlp header prefix> = 32bit x 4", 1278 .cmd = hmp_pcie_aer_inject_error, 1279 }, 1280 1281SRST 1282``pcie_aer_inject_error`` 1283 Inject PCIe AER error 1284ERST 1285 1286 { 1287 .name = "netdev_add", 1288 .args_type = "netdev:O", 1289 .params = "[user|tap|socket|stream|dgram|vde|bridge|hubport|netmap|vhost-user" 1290#ifdef CONFIG_AF_XDP 1291 "|af-xdp" 1292#endif 1293#ifdef CONFIG_VMNET 1294 "|vmnet-host|vmnet-shared|vmnet-bridged" 1295#endif 1296 "],id=str[,prop=value][,...]", 1297 .help = "add host network device", 1298 .cmd = hmp_netdev_add, 1299 .command_completion = netdev_add_completion, 1300 .flags = "p", 1301 }, 1302 1303SRST 1304``netdev_add`` 1305 Add host network device. 1306ERST 1307 1308 { 1309 .name = "netdev_del", 1310 .args_type = "id:s", 1311 .params = "id", 1312 .help = "remove host network device", 1313 .cmd = hmp_netdev_del, 1314 .command_completion = netdev_del_completion, 1315 .flags = "p", 1316 }, 1317 1318SRST 1319``netdev_del`` 1320 Remove host network device. 1321ERST 1322 1323 { 1324 .name = "object_add", 1325 .args_type = "object:S", 1326 .params = "[qom-type=]type,id=str[,prop=value][,...]", 1327 .help = "create QOM object", 1328 .cmd = hmp_object_add, 1329 .command_completion = object_add_completion, 1330 .flags = "p", 1331 }, 1332 1333SRST 1334``object_add`` 1335 Create QOM object. 1336ERST 1337 1338 { 1339 .name = "object_del", 1340 .args_type = "id:s", 1341 .params = "id", 1342 .help = "destroy QOM object", 1343 .cmd = hmp_object_del, 1344 .command_completion = object_del_completion, 1345 .flags = "p", 1346 }, 1347 1348SRST 1349``object_del`` 1350 Destroy QOM object. 1351ERST 1352 1353#ifdef CONFIG_SLIRP 1354 { 1355 .name = "hostfwd_add", 1356 .args_type = "arg1:s,arg2:s?", 1357 .params = "[netdev_id] [tcp|udp]:[hostaddr]:hostport-[guestaddr]:guestport", 1358 .help = "redirect TCP or UDP connections from host to guest (requires -net user)", 1359 .cmd = hmp_hostfwd_add, 1360 }, 1361#endif 1362SRST 1363``hostfwd_add`` 1364 Redirect TCP or UDP connections from host to guest (requires -net user). 1365ERST 1366 1367#ifdef CONFIG_SLIRP 1368 { 1369 .name = "hostfwd_remove", 1370 .args_type = "arg1:s,arg2:s?", 1371 .params = "[netdev_id] [tcp|udp]:[hostaddr]:hostport", 1372 .help = "remove host-to-guest TCP or UDP redirection", 1373 .cmd = hmp_hostfwd_remove, 1374 }, 1375 1376#endif 1377SRST 1378``hostfwd_remove`` 1379 Remove host-to-guest TCP or UDP redirection. 1380ERST 1381 1382 { 1383 .name = "balloon", 1384 .args_type = "value:M", 1385 .params = "target", 1386 .help = "request VM to change its memory allocation (in MB)", 1387 .cmd = hmp_balloon, 1388 }, 1389 1390SRST 1391``balloon`` *value* 1392 Request VM to change its memory allocation to *value* (in MB). 1393ERST 1394 1395 { 1396 .name = "set_link", 1397 .args_type = "name:s,up:b", 1398 .params = "name on|off", 1399 .help = "change the link status of a network adapter", 1400 .cmd = hmp_set_link, 1401 .command_completion = set_link_completion, 1402 }, 1403 1404SRST 1405``set_link`` *name* ``[on|off]`` 1406 Switch link *name* on (i.e. up) or off (i.e. down). 1407ERST 1408 1409 { 1410 .name = "watchdog_action", 1411 .args_type = "action:s", 1412 .params = "[reset|shutdown|poweroff|pause|debug|none|inject-nmi]", 1413 .help = "change watchdog action", 1414 .cmd = hmp_watchdog_action, 1415 .command_completion = watchdog_action_completion, 1416 }, 1417 1418SRST 1419``watchdog_action`` 1420 Change watchdog action. 1421ERST 1422 1423 { 1424 .name = "nbd_server_start", 1425 .args_type = "all:-a,writable:-w,uri:s", 1426 .params = "nbd_server_start [-a] [-w] host:port", 1427 .help = "serve block devices on the given host and port", 1428 .cmd = hmp_nbd_server_start, 1429 .flags = "p", 1430 }, 1431SRST 1432``nbd_server_start`` *host*:*port* 1433 Start an NBD server on the given host and/or port. If the ``-a`` 1434 option is included, all of the virtual machine's block devices that 1435 have an inserted media on them are automatically exported; in this case, 1436 the ``-w`` option makes the devices writable too. 1437ERST 1438 1439 { 1440 .name = "nbd_server_add", 1441 .args_type = "writable:-w,device:B,name:s?", 1442 .params = "nbd_server_add [-w] device [name]", 1443 .help = "export a block device via NBD", 1444 .cmd = hmp_nbd_server_add, 1445 .flags = "p", 1446 }, 1447SRST 1448``nbd_server_add`` *device* [ *name* ] 1449 Export a block device through QEMU's NBD server, which must be started 1450 beforehand with ``nbd_server_start``. The ``-w`` option makes the 1451 exported device writable too. The export name is controlled by *name*, 1452 defaulting to *device*. 1453ERST 1454 1455 { 1456 .name = "nbd_server_remove", 1457 .args_type = "force:-f,name:s", 1458 .params = "nbd_server_remove [-f] name", 1459 .help = "remove an export previously exposed via NBD", 1460 .cmd = hmp_nbd_server_remove, 1461 .flags = "p", 1462 }, 1463SRST 1464``nbd_server_remove [-f]`` *name* 1465 Stop exporting a block device through QEMU's NBD server, which was 1466 previously started with ``nbd_server_add``. The ``-f`` 1467 option forces the server to drop the export immediately even if 1468 clients are connected; otherwise the command fails unless there are no 1469 clients. 1470ERST 1471 1472 { 1473 .name = "nbd_server_stop", 1474 .args_type = "", 1475 .params = "nbd_server_stop", 1476 .help = "stop serving block devices using the NBD protocol", 1477 .cmd = hmp_nbd_server_stop, 1478 .flags = "p", 1479 }, 1480SRST 1481``nbd_server_stop`` 1482 Stop the QEMU embedded NBD server. 1483ERST 1484 1485 1486#if defined(TARGET_I386) 1487 1488 { 1489 .name = "mce", 1490 .args_type = "broadcast:-b,cpu_index:i,bank:i,status:l,mcg_status:l,addr:l,misc:l", 1491 .params = "[-b] cpu bank status mcgstatus addr misc", 1492 .help = "inject a MCE on the given CPU [and broadcast to other CPUs with -b option]", 1493 .cmd = hmp_mce, 1494 }, 1495 1496#endif 1497SRST 1498``mce`` *cpu* *bank* *status* *mcgstatus* *addr* *misc* 1499 Inject an MCE on the given CPU (x86 only). 1500ERST 1501 1502#ifdef CONFIG_POSIX 1503 { 1504 .name = "getfd", 1505 .args_type = "fdname:s", 1506 .params = "getfd name", 1507 .help = "receive a file descriptor via SCM rights and assign it a name", 1508 .cmd = hmp_getfd, 1509 .flags = "p", 1510 }, 1511 1512SRST 1513``getfd`` *fdname* 1514 If a file descriptor is passed alongside this command using the SCM_RIGHTS 1515 mechanism on unix sockets, it is stored using the name *fdname* for 1516 later use by other monitor commands. 1517ERST 1518#endif 1519 1520 { 1521 .name = "closefd", 1522 .args_type = "fdname:s", 1523 .params = "closefd name", 1524 .help = "close a file descriptor previously passed via SCM rights", 1525 .cmd = hmp_closefd, 1526 .flags = "p", 1527 }, 1528 1529SRST 1530``closefd`` *fdname* 1531 Close the file descriptor previously assigned to *fdname* using the 1532 ``getfd`` command. This is only needed if the file descriptor was never 1533 used by another monitor command. 1534ERST 1535 1536 { 1537 .name = "block_set_io_throttle", 1538 .args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l", 1539 .params = "device bps bps_rd bps_wr iops iops_rd iops_wr", 1540 .help = "change I/O throttle limits for a block drive", 1541 .cmd = hmp_block_set_io_throttle, 1542 .flags = "p", 1543 }, 1544 1545SRST 1546``block_set_io_throttle`` *device* *bps* *bps_rd* *bps_wr* *iops* *iops_rd* *iops_wr* 1547 Change I/O throttle limits for a block drive to 1548 *bps* *bps_rd* *bps_wr* *iops* *iops_rd* *iops_wr*. 1549 *device* can be a block device name, a qdev ID or a QOM path. 1550ERST 1551 1552 { 1553 .name = "set_password", 1554 .args_type = "protocol:s,password:s,display:-ds,connected:s?", 1555 .params = "protocol password [-d display] [action-if-connected]", 1556 .help = "set spice/vnc password", 1557 .cmd = hmp_set_password, 1558 }, 1559 1560SRST 1561``set_password [ vnc | spice ] password [ -d display ] [ action-if-connected ]`` 1562 Change spice/vnc password. *display* can be used with 'vnc' to specify 1563 which display to set the password on. *action-if-connected* specifies 1564 what should happen in case a connection is established: *fail* makes 1565 the password change fail. *disconnect* changes the password and 1566 disconnects the client. *keep* changes the password and keeps the 1567 connection up. *keep* is the default. 1568ERST 1569 1570 { 1571 .name = "expire_password", 1572 .args_type = "protocol:s,time:s,display:-ds", 1573 .params = "protocol time [-d display]", 1574 .help = "set spice/vnc password expire-time", 1575 .cmd = hmp_expire_password, 1576 }, 1577 1578SRST 1579``expire_password [ vnc | spice ] expire-time [ -d display ]`` 1580 Specify when a password for spice/vnc becomes invalid. 1581 *display* behaves the same as in ``set_password``. 1582 *expire-time* accepts: 1583 1584 ``now`` 1585 Invalidate password instantly. 1586 ``never`` 1587 Password stays valid forever. 1588 ``+``\ *nsec* 1589 Password stays valid for *nsec* seconds starting now. 1590 *nsec* 1591 Password is invalidated at the given time. *nsec* are the seconds 1592 passed since 1970, i.e. unix epoch. 1593 1594ERST 1595 1596 { 1597 .name = "chardev-add", 1598 .args_type = "args:s", 1599 .params = "args", 1600 .help = "add chardev", 1601 .cmd = hmp_chardev_add, 1602 .command_completion = chardev_add_completion, 1603 }, 1604 1605SRST 1606``chardev-add`` *args* 1607 chardev-add accepts the same parameters as the -chardev command line switch. 1608ERST 1609 1610 { 1611 .name = "chardev-change", 1612 .args_type = "id:s,args:s", 1613 .params = "id args", 1614 .help = "change chardev", 1615 .cmd = hmp_chardev_change, 1616 }, 1617 1618SRST 1619``chardev-change`` *args* 1620 chardev-change accepts existing chardev *id* and then the same arguments 1621 as the -chardev command line switch (except for "id"). 1622ERST 1623 1624 { 1625 .name = "chardev-remove", 1626 .args_type = "id:s", 1627 .params = "id", 1628 .help = "remove chardev", 1629 .cmd = hmp_chardev_remove, 1630 .command_completion = chardev_remove_completion, 1631 }, 1632 1633SRST 1634``chardev-remove`` *id* 1635 Removes the chardev *id*. 1636ERST 1637 1638 { 1639 .name = "chardev-send-break", 1640 .args_type = "id:s", 1641 .params = "id", 1642 .help = "send a break on chardev", 1643 .cmd = hmp_chardev_send_break, 1644 .command_completion = chardev_remove_completion, 1645 }, 1646 1647SRST 1648``chardev-send-break`` *id* 1649 Send a break on the chardev *id*. 1650ERST 1651 1652 { 1653 .name = "qemu-io", 1654 .args_type = "qdev:-d,device:B,command:s", 1655 .params = "[-d] [device] \"[command]\"", 1656 .help = "run a qemu-io command on a block device\n\t\t\t" 1657 "-d: [device] is a device ID rather than a " 1658 "drive ID or node name", 1659 .cmd = hmp_qemu_io, 1660 }, 1661 1662SRST 1663``qemu-io`` *device* *command* 1664 Executes a qemu-io command on the given block device. 1665ERST 1666 1667 { 1668 .name = "qom-list", 1669 .args_type = "path:s?", 1670 .params = "path", 1671 .help = "list QOM properties", 1672 .cmd = hmp_qom_list, 1673 .flags = "p", 1674 }, 1675 1676SRST 1677``qom-list`` [*path*] 1678 Print QOM properties of object at location *path* 1679ERST 1680 1681 { 1682 .name = "qom-get", 1683 .args_type = "path:s,property:s", 1684 .params = "path property", 1685 .help = "print QOM property", 1686 .cmd = hmp_qom_get, 1687 .flags = "p", 1688 }, 1689 1690SRST 1691``qom-get`` *path* *property* 1692 Print QOM property *property* of object at location *path* 1693ERST 1694 1695 { 1696 .name = "qom-set", 1697 .args_type = "json:-j,path:s,property:s,value:S", 1698 .params = "[-j] path property value", 1699 .help = "set QOM property.\n\t\t\t" 1700 "-j: the value is specified in json format.", 1701 .cmd = hmp_qom_set, 1702 .flags = "p", 1703 }, 1704 1705SRST 1706``qom-set`` *path* *property* *value* 1707 Set QOM property *property* of object at location *path* to value *value* 1708ERST 1709 1710 { 1711 .name = "replay_break", 1712 .args_type = "icount:l", 1713 .params = "icount", 1714 .help = "set breakpoint at the specified instruction count", 1715 .cmd = hmp_replay_break, 1716 }, 1717 1718SRST 1719``replay_break`` *icount* 1720 Set replay breakpoint at instruction count *icount*. 1721 Execution stops when the specified instruction is reached. 1722 There can be at most one breakpoint. When breakpoint is set, any prior 1723 one is removed. The breakpoint may be set only in replay mode and only 1724 "in the future", i.e. at instruction counts greater than the current one. 1725 The current instruction count can be observed with ``info replay``. 1726ERST 1727 1728 { 1729 .name = "replay_delete_break", 1730 .args_type = "", 1731 .params = "", 1732 .help = "remove replay breakpoint", 1733 .cmd = hmp_replay_delete_break, 1734 }, 1735 1736SRST 1737``replay_delete_break`` 1738 Remove replay breakpoint which was previously set with ``replay_break``. 1739 The command is ignored when there are no replay breakpoints. 1740ERST 1741 1742 { 1743 .name = "replay_seek", 1744 .args_type = "icount:l", 1745 .params = "icount", 1746 .help = "replay execution to the specified instruction count", 1747 .cmd = hmp_replay_seek, 1748 }, 1749 1750SRST 1751``replay_seek`` *icount* 1752 Automatically proceed to the instruction count *icount*, when 1753 replaying the execution. The command automatically loads nearest 1754 snapshot and replays the execution to find the desired instruction. 1755 When there is no preceding snapshot or the execution is not replayed, 1756 then the command fails. 1757 *icount* for the reference may be observed with ``info replay`` command. 1758ERST 1759 1760 { 1761 .name = "calc_dirty_rate", 1762 .args_type = "dirty_ring:-r,dirty_bitmap:-b,second:l,sample_pages_per_GB:l?", 1763 .params = "[-r] [-b] second [sample_pages_per_GB]", 1764 .help = "start a round of guest dirty rate measurement (using -r to" 1765 "\n\t\t\t specify dirty ring as the method of calculation and" 1766 "\n\t\t\t -b to specify dirty bitmap as method of calculation)", 1767 .cmd = hmp_calc_dirty_rate, 1768 }, 1769 1770SRST 1771``calc_dirty_rate`` *second* 1772 Start a round of dirty rate measurement with the period specified in *second*. 1773 The result of the dirty rate measurement may be observed with ``info 1774 dirty_rate`` command. 1775ERST 1776 1777 { 1778 .name = "set_vcpu_dirty_limit", 1779 .args_type = "dirty_rate:l,cpu_index:l?", 1780 .params = "dirty_rate [cpu_index]", 1781 .help = "set dirty page rate limit, use cpu_index to set limit" 1782 "\n\t\t\t\t\t on a specified virtual cpu", 1783 .cmd = hmp_set_vcpu_dirty_limit, 1784 }, 1785 1786SRST 1787``set_vcpu_dirty_limit`` 1788 Set dirty page rate limit on virtual CPU, the information about all the 1789 virtual CPU dirty limit status can be observed with ``info vcpu_dirty_limit`` 1790 command. 1791ERST 1792 1793 { 1794 .name = "cancel_vcpu_dirty_limit", 1795 .args_type = "cpu_index:l?", 1796 .params = "[cpu_index]", 1797 .help = "cancel dirty page rate limit, use cpu_index to cancel" 1798 "\n\t\t\t\t\t limit on a specified virtual cpu", 1799 .cmd = hmp_cancel_vcpu_dirty_limit, 1800 }, 1801 1802SRST 1803``cancel_vcpu_dirty_limit`` 1804 Cancel dirty page rate limit on virtual CPU, the information about all the 1805 virtual CPU dirty limit status can be observed with ``info vcpu_dirty_limit`` 1806 command. 1807ERST 1808 1809 { 1810 .name = "info", 1811 .args_type = "item:s?", 1812 .params = "[subcommand]", 1813 .help = "show various information about the system state", 1814 .cmd = hmp_info_help, 1815 .sub_table = hmp_info_cmds, 1816 .flags = "p", 1817 }, 1818 1819#if defined(CONFIG_FDT) 1820 { 1821 .name = "dumpdtb", 1822 .args_type = "filename:F", 1823 .params = "filename", 1824 .help = "dump the FDT in dtb format to 'filename'", 1825 .cmd = hmp_dumpdtb, 1826 }, 1827 1828SRST 1829``dumpdtb`` *filename* 1830 Dump the FDT in dtb format to *filename*. 1831ERST 1832#endif 1833 1834#if defined(CONFIG_XEN_EMU) 1835 { 1836 .name = "xen-event-inject", 1837 .args_type = "port:i", 1838 .params = "port", 1839 .help = "inject event channel", 1840 .cmd = hmp_xen_event_inject, 1841 }, 1842 1843SRST 1844``xen-event-inject`` *port* 1845 Notify guest via event channel on port *port*. 1846ERST 1847 1848 1849 { 1850 .name = "xen-event-list", 1851 .args_type = "", 1852 .params = "", 1853 .help = "list event channel state", 1854 .cmd = hmp_xen_event_list, 1855 }, 1856 1857SRST 1858``xen-event-list`` 1859 List event channels in the guest 1860ERST 1861#endif 1862