1config MMU 2 def_bool y 3 4config ZONE_DMA 5 def_bool y 6 7config CPU_BIG_ENDIAN 8 def_bool y 9 10config LOCKDEP_SUPPORT 11 def_bool y 12 13config STACKTRACE_SUPPORT 14 def_bool y 15 16config RWSEM_GENERIC_SPINLOCK 17 bool 18 19config RWSEM_XCHGADD_ALGORITHM 20 def_bool y 21 22config ARCH_HAS_ILOG2_U32 23 def_bool n 24 25config ARCH_HAS_ILOG2_U64 26 def_bool n 27 28config GENERIC_HWEIGHT 29 def_bool y 30 31config GENERIC_BUG 32 def_bool y if BUG 33 34config GENERIC_BUG_RELATIVE_POINTERS 35 def_bool y 36 37config ARCH_DMA_ADDR_T_64BIT 38 def_bool y 39 40config GENERIC_LOCKBREAK 41 def_bool y if SMP && PREEMPT 42 43config PGSTE 44 def_bool y if KVM 45 46config ARCH_SUPPORTS_DEBUG_PAGEALLOC 47 def_bool y 48 49config KEXEC 50 def_bool y 51 select KEXEC_CORE 52 53config AUDIT_ARCH 54 def_bool y 55 56config NO_IOPORT_MAP 57 def_bool y 58 59config PCI_QUIRKS 60 def_bool n 61 62config ARCH_SUPPORTS_UPROBES 63 def_bool y 64 65config DEBUG_RODATA 66 def_bool y 67 68config S390 69 def_bool y 70 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 71 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS 72 select ARCH_HAS_DEVMEM_IS_ALLOWED 73 select ARCH_HAS_ELF_RANDOMIZE 74 select ARCH_HAS_GCOV_PROFILE_ALL 75 select ARCH_HAS_SG_CHAIN 76 select ARCH_HAVE_NMI_SAFE_CMPXCHG 77 select ARCH_INLINE_READ_LOCK 78 select ARCH_INLINE_READ_LOCK_BH 79 select ARCH_INLINE_READ_LOCK_IRQ 80 select ARCH_INLINE_READ_LOCK_IRQSAVE 81 select ARCH_INLINE_READ_TRYLOCK 82 select ARCH_INLINE_READ_UNLOCK 83 select ARCH_INLINE_READ_UNLOCK_BH 84 select ARCH_INLINE_READ_UNLOCK_IRQ 85 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE 86 select ARCH_INLINE_SPIN_LOCK 87 select ARCH_INLINE_SPIN_LOCK_BH 88 select ARCH_INLINE_SPIN_LOCK_IRQ 89 select ARCH_INLINE_SPIN_LOCK_IRQSAVE 90 select ARCH_INLINE_SPIN_TRYLOCK 91 select ARCH_INLINE_SPIN_TRYLOCK_BH 92 select ARCH_INLINE_SPIN_UNLOCK 93 select ARCH_INLINE_SPIN_UNLOCK_BH 94 select ARCH_INLINE_SPIN_UNLOCK_IRQ 95 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE 96 select ARCH_INLINE_WRITE_LOCK 97 select ARCH_INLINE_WRITE_LOCK_BH 98 select ARCH_INLINE_WRITE_LOCK_IRQ 99 select ARCH_INLINE_WRITE_LOCK_IRQSAVE 100 select ARCH_INLINE_WRITE_TRYLOCK 101 select ARCH_INLINE_WRITE_UNLOCK 102 select ARCH_INLINE_WRITE_UNLOCK_BH 103 select ARCH_INLINE_WRITE_UNLOCK_IRQ 104 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE 105 select ARCH_SAVE_PAGE_KEYS if HIBERNATION 106 select ARCH_SUPPORTS_ATOMIC_RMW 107 select ARCH_SUPPORTS_NUMA_BALANCING 108 select ARCH_USE_BUILTIN_BSWAP 109 select ARCH_USE_CMPXCHG_LOCKREF 110 select ARCH_WANTS_PROT_NUMA_PROT_NONE 111 select ARCH_WANT_IPC_PARSE_VERSION 112 select BUILDTIME_EXTABLE_SORT 113 select CLONE_BACKWARDS2 114 select DYNAMIC_FTRACE if FUNCTION_TRACER 115 select GENERIC_CLOCKEVENTS 116 select GENERIC_CPU_AUTOPROBE 117 select GENERIC_CPU_DEVICES if !SMP 118 select GENERIC_FIND_FIRST_BIT 119 select GENERIC_SMP_IDLE_THREAD 120 select GENERIC_TIME_VSYSCALL 121 select HAVE_ALIGNED_STRUCT_PAGE if SLUB 122 select HAVE_ARCH_AUDITSYSCALL 123 select HAVE_ARCH_EARLY_PFN_TO_NID 124 select HAVE_ARCH_JUMP_LABEL 125 select HAVE_ARCH_SECCOMP_FILTER 126 select HAVE_ARCH_SOFT_DIRTY 127 select HAVE_ARCH_TRACEHOOK 128 select HAVE_ARCH_TRANSPARENT_HUGEPAGE 129 select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES 130 select HAVE_CMPXCHG_DOUBLE 131 select HAVE_CMPXCHG_LOCAL 132 select HAVE_DEBUG_KMEMLEAK 133 select HAVE_DMA_API_DEBUG 134 select HAVE_DYNAMIC_FTRACE 135 select HAVE_DYNAMIC_FTRACE_WITH_REGS 136 select HAVE_FTRACE_MCOUNT_RECORD 137 select HAVE_FUNCTION_GRAPH_TRACER 138 select HAVE_FUNCTION_TRACER 139 select HAVE_FUTEX_CMPXCHG if FUTEX 140 select HAVE_KERNEL_BZIP2 141 select HAVE_KERNEL_GZIP 142 select HAVE_KERNEL_LZ4 143 select HAVE_KERNEL_LZMA 144 select HAVE_KERNEL_LZO 145 select HAVE_KERNEL_XZ 146 select HAVE_KPROBES 147 select HAVE_KRETPROBES 148 select HAVE_KVM 149 select HAVE_LIVEPATCH 150 select HAVE_MEMBLOCK 151 select HAVE_MEMBLOCK_NODE_MAP 152 select HAVE_MEMBLOCK_PHYS_MAP 153 select HAVE_MOD_ARCH_SPECIFIC 154 select HAVE_OPROFILE 155 select HAVE_PERF_EVENTS 156 select HAVE_REGS_AND_STACK_ACCESS_API 157 select HAVE_SYSCALL_TRACEPOINTS 158 select HAVE_VIRT_CPU_ACCOUNTING 159 select MODULES_USE_ELF_RELA 160 select NO_BOOTMEM 161 select OLD_SIGACTION 162 select OLD_SIGSUSPEND3 163 select SYSCTL_EXCEPTION_TRACE 164 select TTY 165 select VIRT_CPU_ACCOUNTING 166 select VIRT_TO_BUS 167 168 169config SCHED_OMIT_FRAME_POINTER 170 def_bool y 171 172config PGTABLE_LEVELS 173 int 174 default 4 175 176source "init/Kconfig" 177 178source "kernel/Kconfig.freezer" 179 180source "kernel/livepatch/Kconfig" 181 182menu "Processor type and features" 183 184config HAVE_MARCH_Z900_FEATURES 185 def_bool n 186 187config HAVE_MARCH_Z990_FEATURES 188 def_bool n 189 select HAVE_MARCH_Z900_FEATURES 190 191config HAVE_MARCH_Z9_109_FEATURES 192 def_bool n 193 select HAVE_MARCH_Z990_FEATURES 194 195config HAVE_MARCH_Z10_FEATURES 196 def_bool n 197 select HAVE_MARCH_Z9_109_FEATURES 198 199config HAVE_MARCH_Z196_FEATURES 200 def_bool n 201 select HAVE_MARCH_Z10_FEATURES 202 203config HAVE_MARCH_ZEC12_FEATURES 204 def_bool n 205 select HAVE_MARCH_Z196_FEATURES 206 207config HAVE_MARCH_Z13_FEATURES 208 def_bool n 209 select HAVE_MARCH_ZEC12_FEATURES 210 211choice 212 prompt "Processor type" 213 default MARCH_Z900 214 215config MARCH_Z900 216 bool "IBM zSeries model z800 and z900" 217 select HAVE_MARCH_Z900_FEATURES 218 help 219 Select this to enable optimizations for model z800/z900 (2064 and 220 2066 series). This will enable some optimizations that are not 221 available on older ESA/390 (31 Bit) only CPUs. 222 223config MARCH_Z990 224 bool "IBM zSeries model z890 and z990" 225 select HAVE_MARCH_Z990_FEATURES 226 help 227 Select this to enable optimizations for model z890/z990 (2084 and 228 2086 series). The kernel will be slightly faster but will not work 229 on older machines. 230 231config MARCH_Z9_109 232 bool "IBM System z9" 233 select HAVE_MARCH_Z9_109_FEATURES 234 help 235 Select this to enable optimizations for IBM System z9 (2094 and 236 2096 series). The kernel will be slightly faster but will not work 237 on older machines. 238 239config MARCH_Z10 240 bool "IBM System z10" 241 select HAVE_MARCH_Z10_FEATURES 242 help 243 Select this to enable optimizations for IBM System z10 (2097 and 244 2098 series). The kernel will be slightly faster but will not work 245 on older machines. 246 247config MARCH_Z196 248 bool "IBM zEnterprise 114 and 196" 249 select HAVE_MARCH_Z196_FEATURES 250 help 251 Select this to enable optimizations for IBM zEnterprise 114 and 196 252 (2818 and 2817 series). The kernel will be slightly faster but will 253 not work on older machines. 254 255config MARCH_ZEC12 256 bool "IBM zBC12 and zEC12" 257 select HAVE_MARCH_ZEC12_FEATURES 258 help 259 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and 260 2827 series). The kernel will be slightly faster but will not work on 261 older machines. 262 263config MARCH_Z13 264 bool "IBM z13s and z13" 265 select HAVE_MARCH_Z13_FEATURES 266 help 267 Select this to enable optimizations for IBM z13s and z13 (2965 and 268 2964 series). The kernel will be slightly faster but will not work on 269 older machines. 270 271endchoice 272 273config MARCH_Z900_TUNE 274 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT 275 276config MARCH_Z990_TUNE 277 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT 278 279config MARCH_Z9_109_TUNE 280 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT 281 282config MARCH_Z10_TUNE 283 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT 284 285config MARCH_Z196_TUNE 286 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT 287 288config MARCH_ZEC12_TUNE 289 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT 290 291config MARCH_Z13_TUNE 292 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT 293 294choice 295 prompt "Tune code generation" 296 default TUNE_DEFAULT 297 help 298 Cause the compiler to tune (-mtune) the generated code for a machine. 299 This will make the code run faster on the selected machine but 300 somewhat slower on other machines. 301 This option only changes how the compiler emits instructions, not the 302 selection of instructions itself, so the resulting kernel will run on 303 all other machines. 304 305config TUNE_DEFAULT 306 bool "Default" 307 help 308 Tune the generated code for the target processor for which the kernel 309 will be compiled. 310 311config TUNE_Z900 312 bool "IBM zSeries model z800 and z900" 313 314config TUNE_Z990 315 bool "IBM zSeries model z890 and z990" 316 317config TUNE_Z9_109 318 bool "IBM System z9" 319 320config TUNE_Z10 321 bool "IBM System z10" 322 323config TUNE_Z196 324 bool "IBM zEnterprise 114 and 196" 325 326config TUNE_ZEC12 327 bool "IBM zBC12 and zEC12" 328 329config TUNE_Z13 330 bool "IBM z13" 331 332endchoice 333 334config 64BIT 335 def_bool y 336 337config COMPAT 338 def_bool y 339 prompt "Kernel support for 31 bit emulation" 340 select COMPAT_BINFMT_ELF if BINFMT_ELF 341 select ARCH_WANT_OLD_COMPAT_IPC 342 select COMPAT_OLD_SIGACTION 343 depends on MULTIUSER 344 help 345 Select this option if you want to enable your system kernel to 346 handle system-calls from ELF binaries for 31 bit ESA. This option 347 (and some other stuff like libraries and such) is needed for 348 executing 31 bit applications. It is safe to say "Y". 349 350config SYSVIPC_COMPAT 351 def_bool y if COMPAT && SYSVIPC 352 353config KEYS_COMPAT 354 def_bool y if COMPAT && KEYS 355 356config SMP 357 def_bool y 358 prompt "Symmetric multi-processing support" 359 ---help--- 360 This enables support for systems with more than one CPU. If you have 361 a system with only one CPU, like most personal computers, say N. If 362 you have a system with more than one CPU, say Y. 363 364 If you say N here, the kernel will run on uni- and multiprocessor 365 machines, but will use only one CPU of a multiprocessor machine. If 366 you say Y here, the kernel will run on many, but not all, 367 uniprocessor machines. On a uniprocessor machine, the kernel 368 will run faster if you say N here. 369 370 See also the SMP-HOWTO available at 371 <http://www.tldp.org/docs.html#howto>. 372 373 Even if you don't know what to do here, say Y. 374 375config NR_CPUS 376 int "Maximum number of CPUs (2-512)" 377 range 2 512 378 depends on SMP 379 default "64" 380 help 381 This allows you to specify the maximum number of CPUs which this 382 kernel will support. The maximum supported value is 512 and the 383 minimum value which makes sense is 2. 384 385 This is purely to save memory - each supported CPU adds 386 approximately sixteen kilobytes to the kernel image. 387 388config HOTPLUG_CPU 389 def_bool y 390 prompt "Support for hot-pluggable CPUs" 391 depends on SMP 392 help 393 Say Y here to be able to turn CPUs off and on. CPUs 394 can be controlled through /sys/devices/system/cpu/cpu#. 395 Say N if you want to disable CPU hotplug. 396 397# Some NUMA nodes have memory ranges that span 398# other nodes. Even though a pfn is valid and 399# between a node's start and end pfns, it may not 400# reside on that node. See memmap_init_zone() 401# for details. <- They meant memory holes! 402config NODES_SPAN_OTHER_NODES 403 def_bool NUMA 404 405config NUMA 406 bool "NUMA support" 407 depends on SMP && SCHED_TOPOLOGY 408 default n 409 help 410 Enable NUMA support 411 412 This option adds NUMA support to the kernel. 413 414 An operation mode can be selected by appending 415 numa=<method> to the kernel command line. 416 417 The default behaviour is identical to appending numa=plain to 418 the command line. This will create just one node with all 419 available memory and all CPUs in it. 420 421config NODES_SHIFT 422 int "Maximum NUMA nodes (as a power of 2)" 423 range 1 10 424 depends on NUMA 425 default "4" 426 help 427 Specify the maximum number of NUMA nodes available on the target 428 system. Increases memory reserved to accommodate various tables. 429 430menu "Select NUMA modes" 431 depends on NUMA 432 433config NUMA_EMU 434 bool "NUMA emulation" 435 default y 436 help 437 Numa emulation mode will split the available system memory into 438 equal chunks which then are distributed over the configured number 439 of nodes in a round-robin manner. 440 441 The number of fake nodes is limited by the number of available memory 442 chunks (i.e. memory size / fake size) and the number of supported 443 nodes in the kernel. 444 445 The CPUs are assigned to the nodes in a way that partially respects 446 the original machine topology (if supported by the machine). 447 Fair distribution of the CPUs is not guaranteed. 448 449config EMU_SIZE 450 hex "NUMA emulation memory chunk size" 451 default 0x10000000 452 range 0x400000 0x100000000 453 depends on NUMA_EMU 454 help 455 Select the default size by which the memory is chopped and then 456 assigned to emulated NUMA nodes. 457 458 This can be overridden by specifying 459 460 emu_size=<n> 461 462 on the kernel command line where also suffixes K, M, G, and T are 463 supported. 464 465endmenu 466 467config SCHED_SMT 468 def_bool n 469 470config SCHED_MC 471 def_bool n 472 473config SCHED_BOOK 474 def_bool n 475 476config SCHED_TOPOLOGY 477 def_bool y 478 prompt "Topology scheduler support" 479 depends on SMP 480 select SCHED_SMT 481 select SCHED_MC 482 select SCHED_BOOK 483 help 484 Topology scheduler support improves the CPU scheduler's decision 485 making when dealing with machines that have multi-threading, 486 multiple cores or multiple books. 487 488source kernel/Kconfig.preempt 489 490source kernel/Kconfig.hz 491 492endmenu 493 494menu "Memory setup" 495 496config ARCH_SPARSEMEM_ENABLE 497 def_bool y 498 select SPARSEMEM_VMEMMAP_ENABLE 499 select SPARSEMEM_VMEMMAP 500 501config ARCH_SPARSEMEM_DEFAULT 502 def_bool y 503 504config ARCH_SELECT_MEMORY_MODEL 505 def_bool y 506 507config ARCH_ENABLE_MEMORY_HOTPLUG 508 def_bool y if SPARSEMEM 509 510config ARCH_ENABLE_MEMORY_HOTREMOVE 511 def_bool y 512 513config ARCH_ENABLE_SPLIT_PMD_PTLOCK 514 def_bool y 515 516config FORCE_MAX_ZONEORDER 517 int 518 default "9" 519 520source "mm/Kconfig" 521 522config PACK_STACK 523 def_bool y 524 prompt "Pack kernel stack" 525 help 526 This option enables the compiler option -mkernel-backchain if it 527 is available. If the option is available the compiler supports 528 the new stack layout which dramatically reduces the minimum stack 529 frame size. With an old compiler a non-leaf function needs a 530 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With 531 -mkernel-backchain the minimum size drops to 16 byte on 31 bit 532 and 24 byte on 64 bit. 533 534 Say Y if you are unsure. 535 536config CHECK_STACK 537 def_bool y 538 prompt "Detect kernel stack overflow" 539 help 540 This option enables the compiler option -mstack-guard and 541 -mstack-size if they are available. If the compiler supports them 542 it will emit additional code to each function prolog to trigger 543 an illegal operation if the kernel stack is about to overflow. 544 545 Say N if you are unsure. 546 547config STACK_GUARD 548 int "Size of the guard area (128-1024)" 549 range 128 1024 550 depends on CHECK_STACK 551 default "256" 552 help 553 This allows you to specify the size of the guard area at the lower 554 end of the kernel stack. If the kernel stack points into the guard 555 area on function entry an illegal operation is triggered. The size 556 needs to be a power of 2. Please keep in mind that the size of an 557 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. 558 The minimum size for the stack guard should be 256 for 31 bit and 559 512 for 64 bit. 560 561config WARN_DYNAMIC_STACK 562 def_bool n 563 prompt "Emit compiler warnings for function with dynamic stack usage" 564 help 565 This option enables the compiler option -mwarn-dynamicstack. If the 566 compiler supports this options generates warnings for functions 567 that dynamically allocate stack space using alloca. 568 569 Say N if you are unsure. 570 571endmenu 572 573menu "I/O subsystem" 574 575config QDIO 576 def_tristate y 577 prompt "QDIO support" 578 ---help--- 579 This driver provides the Queued Direct I/O base support for 580 IBM System z. 581 582 To compile this driver as a module, choose M here: the 583 module will be called qdio. 584 585 If unsure, say Y. 586 587menuconfig PCI 588 bool "PCI support" 589 select PCI_MSI 590 select IOMMU_SUPPORT 591 help 592 Enable PCI support. 593 594if PCI 595 596config PCI_NR_FUNCTIONS 597 int "Maximum number of PCI functions (1-4096)" 598 range 1 4096 599 default "64" 600 help 601 This allows you to specify the maximum number of PCI functions which 602 this kernel will support. 603 604config PCI_NR_MSI 605 int "Maximum number of MSI interrupts (64-32768)" 606 range 64 32768 607 default "256" 608 help 609 This defines the number of virtual interrupts the kernel will 610 provide for MSI interrupts. If you configure your system to have 611 too few drivers will fail to allocate MSI interrupts for all 612 PCI devices. 613 614source "drivers/pci/Kconfig" 615 616endif # PCI 617 618config PCI_DOMAINS 619 def_bool PCI 620 621config HAS_IOMEM 622 def_bool PCI 623 624config IOMMU_HELPER 625 def_bool PCI 626 627config NEED_SG_DMA_LENGTH 628 def_bool PCI 629 630config NEED_DMA_MAP_STATE 631 def_bool PCI 632 633config CHSC_SCH 634 def_tristate m 635 prompt "Support for CHSC subchannels" 636 help 637 This driver allows usage of CHSC subchannels. A CHSC subchannel 638 is usually present on LPAR only. 639 The driver creates a device /dev/chsc, which may be used to 640 obtain I/O configuration information about the machine and 641 to issue asynchronous chsc commands (DANGEROUS). 642 You will usually only want to use this interface on a special 643 LPAR designated for system management. 644 645 To compile this driver as a module, choose M here: the 646 module will be called chsc_sch. 647 648 If unsure, say N. 649 650config SCM_BUS 651 def_bool y 652 prompt "SCM bus driver" 653 help 654 Bus driver for Storage Class Memory. 655 656config EADM_SCH 657 def_tristate m 658 prompt "Support for EADM subchannels" 659 depends on SCM_BUS 660 help 661 This driver allows usage of EADM subchannels. EADM subchannels act 662 as a communication vehicle for SCM increments. 663 664 To compile this driver as a module, choose M here: the 665 module will be called eadm_sch. 666 667endmenu 668 669menu "Dump support" 670 671config CRASH_DUMP 672 bool "kernel crash dumps" 673 depends on SMP 674 select KEXEC 675 help 676 Generate crash dump after being started by kexec. 677 Crash dump kernels are loaded in the main kernel with kexec-tools 678 into a specially reserved region and then later executed after 679 a crash by kdump/kexec. 680 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. 681 This option also enables s390 zfcpdump. 682 See also <file:Documentation/s390/zfcpdump.txt> 683 684endmenu 685 686menu "Executable file formats / Emulations" 687 688source "fs/Kconfig.binfmt" 689 690config SECCOMP 691 def_bool y 692 prompt "Enable seccomp to safely compute untrusted bytecode" 693 depends on PROC_FS 694 help 695 This kernel feature is useful for number crunching applications 696 that may need to compute untrusted bytecode during their 697 execution. By using pipes or other transports made available to 698 the process as file descriptors supporting the read/write 699 syscalls, it's possible to isolate those applications in 700 their own address space using seccomp. Once seccomp is 701 enabled via /proc/<pid>/seccomp, it cannot be disabled 702 and the task is only allowed to execute a few safe syscalls 703 defined by each seccomp mode. 704 705 If unsure, say Y. 706 707endmenu 708 709menu "Power Management" 710 711config ARCH_HIBERNATION_POSSIBLE 712 def_bool y 713 714source "kernel/power/Kconfig" 715 716endmenu 717 718source "net/Kconfig" 719 720config PCMCIA 721 def_bool n 722 723config CCW 724 def_bool y 725 726source "drivers/Kconfig" 727 728source "fs/Kconfig" 729 730source "arch/s390/Kconfig.debug" 731 732source "security/Kconfig" 733 734source "crypto/Kconfig" 735 736source "lib/Kconfig" 737 738menu "Virtualization" 739 740config PFAULT 741 def_bool y 742 prompt "Pseudo page fault support" 743 help 744 Select this option, if you want to use PFAULT pseudo page fault 745 handling under VM. If running native or in LPAR, this option 746 has no effect. If your VM does not support PFAULT, PAGEEX 747 pseudo page fault handling will be used. 748 Note that VM 4.2 supports PFAULT but has a bug in its 749 implementation that causes some problems. 750 Everybody who wants to run Linux under VM != VM4.2 should select 751 this option. 752 753config SHARED_KERNEL 754 bool "VM shared kernel support" 755 depends on !JUMP_LABEL 756 help 757 Select this option, if you want to share the text segment of the 758 Linux kernel between different VM guests. This reduces memory 759 usage with lots of guests but greatly increases kernel size. 760 Also if a kernel was IPL'ed from a shared segment the kexec system 761 call will not work. 762 You should only select this option if you know what you are 763 doing and want to exploit this feature. 764 765config CMM 766 def_tristate n 767 prompt "Cooperative memory management" 768 help 769 Select this option, if you want to enable the kernel interface 770 to reduce the memory size of the system. This is accomplished 771 by allocating pages of memory and put them "on hold". This only 772 makes sense for a system running under VM where the unused pages 773 will be reused by VM for other guest systems. The interface 774 allows an external monitor to balance memory of many systems. 775 Everybody who wants to run Linux under VM should select this 776 option. 777 778config CMM_IUCV 779 def_bool y 780 prompt "IUCV special message interface to cooperative memory management" 781 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) 782 help 783 Select this option to enable the special message interface to 784 the cooperative memory management. 785 786config APPLDATA_BASE 787 def_bool n 788 prompt "Linux - VM Monitor Stream, base infrastructure" 789 depends on PROC_FS 790 help 791 This provides a kernel interface for creating and updating z/VM APPLDATA 792 monitor records. The monitor records are updated at certain time 793 intervals, once the timer is started. 794 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, 795 i.e. enables or disables monitoring on the Linux side. 796 A custom interval value (in seconds) can be written to 797 /proc/appldata/interval. 798 799 Defaults are 60 seconds interval and timer off. 800 The /proc entries can also be read from, showing the current settings. 801 802config APPLDATA_MEM 803 def_tristate m 804 prompt "Monitor memory management statistics" 805 depends on APPLDATA_BASE && VM_EVENT_COUNTERS 806 help 807 This provides memory management related data to the Linux - VM Monitor 808 Stream, like paging/swapping rate, memory utilisation, etc. 809 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM 810 APPLDATA monitor record, i.e. enables or disables monitoring this record 811 on the z/VM side. 812 813 Default is disabled. 814 The /proc entry can also be read from, showing the current settings. 815 816 This can also be compiled as a module, which will be called 817 appldata_mem.o. 818 819config APPLDATA_OS 820 def_tristate m 821 prompt "Monitor OS statistics" 822 depends on APPLDATA_BASE 823 help 824 This provides OS related data to the Linux - VM Monitor Stream, like 825 CPU utilisation, etc. 826 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM 827 APPLDATA monitor record, i.e. enables or disables monitoring this record 828 on the z/VM side. 829 830 Default is disabled. 831 This can also be compiled as a module, which will be called 832 appldata_os.o. 833 834config APPLDATA_NET_SUM 835 def_tristate m 836 prompt "Monitor overall network statistics" 837 depends on APPLDATA_BASE && NET 838 help 839 This provides network related data to the Linux - VM Monitor Stream, 840 currently there is only a total sum of network I/O statistics, no 841 per-interface data. 842 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM 843 APPLDATA monitor record, i.e. enables or disables monitoring this record 844 on the z/VM side. 845 846 Default is disabled. 847 This can also be compiled as a module, which will be called 848 appldata_net_sum.o. 849 850config S390_HYPFS_FS 851 def_bool y 852 prompt "s390 hypervisor file system support" 853 select SYS_HYPERVISOR 854 help 855 This is a virtual file system intended to provide accounting 856 information in an s390 hypervisor environment. 857 858source "arch/s390/kvm/Kconfig" 859 860config S390_GUEST 861 def_bool y 862 prompt "s390 support for virtio devices" 863 select TTY 864 select VIRTUALIZATION 865 select VIRTIO 866 select VIRTIO_CONSOLE 867 help 868 Enabling this option adds support for virtio based paravirtual device 869 drivers on s390. 870 871 Select this option if you want to run the kernel as a guest under 872 the KVM hypervisor. 873 874endmenu 875