arch/s390/Kconfig

   1 config MMU
   2         def_bool y
   3
   4 config ZONE_DMA
   5         def_bool y
   6
   7 config LOCKDEP_SUPPORT
   8         def_bool y
   9
  10 config STACKTRACE_SUPPORT
  11         def_bool y
  12
  13 config HAVE_LATENCYTOP_SUPPORT
  14         def_bool y
  15
  16 config RWSEM_GENERIC_SPINLOCK
  17         bool
  18
  19 config RWSEM_XCHGADD_ALGORITHM
  20         def_bool y
  21
  22 config ARCH_HAS_ILOG2_U32
  23         def_bool n
  24
  25 config ARCH_HAS_ILOG2_U64
  26         def_bool n
  27
  28 config GENERIC_HWEIGHT
  29         def_bool y
  30
  31 config GENERIC_BUG
  32         def_bool y if BUG
  33
  34 config GENERIC_BUG_RELATIVE_POINTERS
  35         def_bool y
  36
  37 config ARCH_DMA_ADDR_T_64BIT
  38         def_bool 64BIT
  39
  40 config GENERIC_LOCKBREAK
  41         def_bool y if SMP && PREEMPT
  42
  43 config PGSTE
  44         def_bool y if KVM
  45
  46 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  47         def_bool y
  48
  49 config KEXEC
  50         def_bool y
  51
  52 config AUDIT_ARCH
  53         def_bool y
  54
  55 config NO_IOPORT
  56         def_bool y
  57
  58 config PCI_QUIRKS
  59         def_bool n
  60
  61 config S390
  62         def_bool y
  63         select ARCH_DISCARD_MEMBLOCK
  64         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  65         select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
  66         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  67         select ARCH_INLINE_READ_LOCK
  68         select ARCH_INLINE_READ_LOCK_BH
  69         select ARCH_INLINE_READ_LOCK_IRQ
  70         select ARCH_INLINE_READ_LOCK_IRQSAVE
  71         select ARCH_INLINE_READ_TRYLOCK
  72         select ARCH_INLINE_READ_UNLOCK
  73         select ARCH_INLINE_READ_UNLOCK_BH
  74         select ARCH_INLINE_READ_UNLOCK_IRQ
  75         select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
  76         select ARCH_INLINE_SPIN_LOCK
  77         select ARCH_INLINE_SPIN_LOCK_BH
  78         select ARCH_INLINE_SPIN_LOCK_IRQ
  79         select ARCH_INLINE_SPIN_LOCK_IRQSAVE
  80         select ARCH_INLINE_SPIN_TRYLOCK
  81         select ARCH_INLINE_SPIN_TRYLOCK_BH
  82         select ARCH_INLINE_SPIN_UNLOCK
  83         select ARCH_INLINE_SPIN_UNLOCK_BH
  84         select ARCH_INLINE_SPIN_UNLOCK_IRQ
  85         select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
  86         select ARCH_INLINE_WRITE_LOCK
  87         select ARCH_INLINE_WRITE_LOCK_BH
  88         select ARCH_INLINE_WRITE_LOCK_IRQ
  89         select ARCH_INLINE_WRITE_LOCK_IRQSAVE
  90         select ARCH_INLINE_WRITE_TRYLOCK
  91         select ARCH_INLINE_WRITE_UNLOCK
  92         select ARCH_INLINE_WRITE_UNLOCK_BH
  93         select ARCH_INLINE_WRITE_UNLOCK_IRQ
  94         select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
  95         select ARCH_SAVE_PAGE_KEYS if HIBERNATION
  96         select ARCH_USE_CMPXCHG_LOCKREF
  97         select ARCH_WANT_IPC_PARSE_VERSION
  98         select BUILDTIME_EXTABLE_SORT
  99         select CLONE_BACKWARDS2
 100         select GENERIC_CLOCKEVENTS
 101         select GENERIC_CPU_DEVICES if !SMP
 102         select GENERIC_FIND_FIRST_BIT
 103         select GENERIC_SMP_IDLE_THREAD
 104         select GENERIC_TIME_VSYSCALL
 105         select HAVE_ALIGNED_STRUCT_PAGE if SLUB
 106         select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
 107         select HAVE_ARCH_SECCOMP_FILTER
 108         select HAVE_ARCH_TRACEHOOK
 109         select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
 110         select HAVE_BPF_JIT if 64BIT && PACK_STACK
 111         select HAVE_CMPXCHG_DOUBLE
 112         select HAVE_CMPXCHG_LOCAL
 113         select HAVE_C_RECORDMCOUNT
 114         select HAVE_DEBUG_KMEMLEAK
 115         select HAVE_DYNAMIC_FTRACE
 116         select HAVE_FTRACE_MCOUNT_RECORD
 117         select HAVE_FUNCTION_GRAPH_TRACER
 118         select HAVE_FUNCTION_TRACER
 119         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
 120         select HAVE_KERNEL_BZIP2
 121         select HAVE_KERNEL_GZIP
 122         select HAVE_KERNEL_LZ4
 123         select HAVE_KERNEL_LZMA
 124         select HAVE_KERNEL_LZO
 125         select HAVE_KERNEL_XZ
 126         select HAVE_KPROBES
 127         select HAVE_KRETPROBES
 128         select HAVE_KVM if 64BIT
 129         select HAVE_MEMBLOCK
 130         select HAVE_MEMBLOCK_NODE_MAP
 131         select HAVE_MOD_ARCH_SPECIFIC
 132         select HAVE_OPROFILE
 133         select HAVE_PERF_EVENTS
 134         select HAVE_REGS_AND_STACK_ACCESS_API
 135         select HAVE_SYSCALL_TRACEPOINTS
 136         select HAVE_UID16 if 32BIT
 137         select HAVE_VIRT_CPU_ACCOUNTING
 138         select KTIME_SCALAR if 32BIT
 139         select MODULES_USE_ELF_RELA
 140         select OLD_SIGACTION
 141         select OLD_SIGSUSPEND3
 142         select SYSCTL_EXCEPTION_TRACE
 143         select VIRT_CPU_ACCOUNTING
 144         select VIRT_TO_BUS
 145
 146 config SCHED_OMIT_FRAME_POINTER
 147         def_bool y
 148
 149 source "init/Kconfig"
 150
 151 source "kernel/Kconfig.freezer"
 152
 153 menu "Processor type and features"
 154
 155 config HAVE_MARCH_Z900_FEATURES
 156         def_bool n
 157
 158 config HAVE_MARCH_Z990_FEATURES
 159         def_bool n
 160         select HAVE_MARCH_Z900_FEATURES
 161
 162 config HAVE_MARCH_Z9_109_FEATURES
 163         def_bool n
 164         select HAVE_MARCH_Z990_FEATURES
 165
 166 config HAVE_MARCH_Z10_FEATURES
 167         def_bool n
 168         select HAVE_MARCH_Z9_109_FEATURES
 169
 170 config HAVE_MARCH_Z196_FEATURES
 171         def_bool n
 172         select HAVE_MARCH_Z10_FEATURES
 173
 174 config HAVE_MARCH_ZEC12_FEATURES
 175         def_bool n
 176         select HAVE_MARCH_Z196_FEATURES
 177
 178 choice
 179         prompt "Processor type"
 180         default MARCH_G5
 181
 182 config MARCH_G5
 183         bool "System/390 model G5 and G6"
 184         depends on !64BIT
 185         help
 186           Select this to build a 31 bit kernel that works
 187           on all ESA/390 and z/Architecture machines.
 188
 189 config MARCH_Z900
 190         bool "IBM zSeries model z800 and z900"
 191         select HAVE_MARCH_Z900_FEATURES if 64BIT
 192         help
 193           Select this to enable optimizations for model z800/z900 (2064 and
 194           2066 series). This will enable some optimizations that are not
 195           available on older ESA/390 (31 Bit) only CPUs.
 196
 197 config MARCH_Z990
 198         bool "IBM zSeries model z890 and z990"
 199         select HAVE_MARCH_Z990_FEATURES if 64BIT
 200         help
 201           Select this to enable optimizations for model z890/z990 (2084 and
 202           2086 series). The kernel will be slightly faster but will not work
 203           on older machines.
 204
 205 config MARCH_Z9_109
 206         bool "IBM System z9"
 207         select HAVE_MARCH_Z9_109_FEATURES if 64BIT
 208         help
 209           Select this to enable optimizations for IBM System z9 (2094 and
 210           2096 series). The kernel will be slightly faster but will not work
 211           on older machines.
 212
 213 config MARCH_Z10
 214         bool "IBM System z10"
 215         select HAVE_MARCH_Z10_FEATURES if 64BIT
 216         help
 217           Select this to enable optimizations for IBM System z10 (2097 and
 218           2098 series). The kernel will be slightly faster but will not work
 219           on older machines.
 220
 221 config MARCH_Z196
 222         bool "IBM zEnterprise 114 and 196"
 223         select HAVE_MARCH_Z196_FEATURES if 64BIT
 224         help
 225           Select this to enable optimizations for IBM zEnterprise 114 and 196
 226           (2818 and 2817 series). The kernel will be slightly faster but will
 227           not work on older machines.
 228
 229 config MARCH_ZEC12
 230         bool "IBM zBC12 and zEC12"
 231         select HAVE_MARCH_ZEC12_FEATURES if 64BIT
 232         help
 233           Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
 234           2827 series). The kernel will be slightly faster but will not work on
 235           older machines.
 236
 237 endchoice
 238
 239 config MARCH_G5_TUNE
 240         def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT
 241
 242 config MARCH_Z900_TUNE
 243         def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
 244
 245 config MARCH_Z990_TUNE
 246         def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
 247
 248 config MARCH_Z9_109_TUNE
 249         def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
 250
 251 config MARCH_Z10_TUNE
 252         def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
 253
 254 config MARCH_Z196_TUNE
 255         def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
 256
 257 config MARCH_ZEC12_TUNE
 258         def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
 259
 260 choice
 261         prompt "Tune code generation"
 262         default TUNE_DEFAULT
 263         help
 264           Cause the compiler to tune (-mtune) the generated code for a machine.
 265           This will make the code run faster on the selected machine but
 266           somewhat slower on other machines.
 267           This option only changes how the compiler emits instructions, not the
 268           selection of instructions itself, so the resulting kernel will run on
 269           all other machines.
 270
 271 config TUNE_DEFAULT
 272         bool "Default"
 273         help
 274           Tune the generated code for the target processor for which the kernel
 275           will be compiled.
 276
 277 config TUNE_G5
 278         bool "System/390 model G5 and G6"
 279
 280 config TUNE_Z900
 281         bool "IBM zSeries model z800 and z900"
 282
 283 config TUNE_Z990
 284         bool "IBM zSeries model z890 and z990"
 285
 286 config TUNE_Z9_109
 287         bool "IBM System z9"
 288
 289 config TUNE_Z10
 290         bool "IBM System z10"
 291
 292 config TUNE_Z196
 293         bool "IBM zEnterprise 114 and 196"
 294
 295 config TUNE_ZEC12
 296         bool "IBM zBC12 and zEC12"
 297
 298 endchoice
 299
 300 config 64BIT
 301         def_bool y
 302         prompt "64 bit kernel"
 303         help
 304           Select this option if you have an IBM z/Architecture machine
 305           and want to use the 64 bit addressing mode.
 306
 307 config 32BIT
 308         def_bool y if !64BIT
 309
 310 config COMPAT
 311         def_bool y
 312         prompt "Kernel support for 31 bit emulation"
 313         depends on 64BIT
 314         select COMPAT_BINFMT_ELF if BINFMT_ELF
 315         select ARCH_WANT_OLD_COMPAT_IPC
 316         select COMPAT_OLD_SIGACTION
 317         help
 318           Select this option if you want to enable your system kernel to
 319           handle system-calls from ELF binaries for 31 bit ESA.  This option
 320           (and some other stuff like libraries and such) is needed for
 321           executing 31 bit applications.  It is safe to say "Y".
 322
 323 config SYSVIPC_COMPAT
 324         def_bool y if COMPAT && SYSVIPC
 325
 326 config KEYS_COMPAT
 327         def_bool y if COMPAT && KEYS
 328
 329 config SMP
 330         def_bool y
 331         prompt "Symmetric multi-processing support"
 332         ---help---
 333           This enables support for systems with more than one CPU. If you have
 334           a system with only one CPU, like most personal computers, say N. If
 335           you have a system with more than one CPU, say Y.
 336
 337           If you say N here, the kernel will run on uni- and multiprocessor
 338           machines, but will use only one CPU of a multiprocessor machine. If
 339           you say Y here, the kernel will run on many, but not all,
 340           uniprocessor machines. On a uniprocessor machine, the kernel
 341           will run faster if you say N here.
 342
 343           See also the SMP-HOWTO available at
 344           <http://www.tldp.org/docs.html#howto>.
 345
 346           Even if you don't know what to do here, say Y.
 347
 348 config NR_CPUS
 349         int "Maximum number of CPUs (2-256)"
 350         range 2 256
 351         depends on SMP
 352         default "32" if !64BIT
 353         default "64" if 64BIT
 354         help
 355           This allows you to specify the maximum number of CPUs which this
 356           kernel will support. The maximum supported value is 256 and the
 357           minimum value which makes sense is 2.
 358
 359           This is purely to save memory - each supported CPU adds
 360           approximately sixteen kilobytes to the kernel image.
 361
 362 config HOTPLUG_CPU
 363         def_bool y
 364         prompt "Support for hot-pluggable CPUs"
 365         depends on SMP
 366         help
 367           Say Y here to be able to turn CPUs off and on. CPUs
 368           can be controlled through /sys/devices/system/cpu/cpu#.
 369           Say N if you want to disable CPU hotplug.
 370
 371 config SCHED_MC
 372         def_bool n
 373
 374 config SCHED_BOOK
 375         def_bool y
 376         prompt "Book scheduler support"
 377         depends on SMP
 378         select SCHED_MC
 379         help
 380           Book scheduler support improves the CPU scheduler's decision making
 381           when dealing with machines that have several books.
 382
 383 source kernel/Kconfig.preempt
 384
 385 config MATHEMU
 386         def_bool y
 387         prompt "IEEE FPU emulation"
 388         depends on MARCH_G5
 389         help
 390           This option is required for IEEE compliant floating point arithmetic
 391           on older ESA/390 machines. Say Y unless you know your machine doesn't
 392           need this.
 393
 394 source kernel/Kconfig.hz
 395
 396 endmenu
 397
 398 menu "Memory setup"
 399
 400 config ARCH_SPARSEMEM_ENABLE
 401         def_bool y
 402         select SPARSEMEM_VMEMMAP_ENABLE
 403         select SPARSEMEM_VMEMMAP
 404         select SPARSEMEM_STATIC if !64BIT
 405
 406 config ARCH_SPARSEMEM_DEFAULT
 407         def_bool y
 408
 409 config ARCH_SELECT_MEMORY_MODEL
 410         def_bool y
 411
 412 config ARCH_ENABLE_MEMORY_HOTPLUG
 413         def_bool y if SPARSEMEM
 414
 415 config ARCH_ENABLE_MEMORY_HOTREMOVE
 416         def_bool y
 417
 418 config FORCE_MAX_ZONEORDER
 419         int
 420         default "9"
 421
 422 source "mm/Kconfig"
 423
 424 config PACK_STACK
 425         def_bool y
 426         prompt "Pack kernel stack"
 427         help
 428           This option enables the compiler option -mkernel-backchain if it
 429           is available. If the option is available the compiler supports
 430           the new stack layout which dramatically reduces the minimum stack
 431           frame size. With an old compiler a non-leaf function needs a
 432           minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
 433           -mkernel-backchain the minimum size drops to 16 byte on 31 bit
 434           and 24 byte on 64 bit.
 435
 436           Say Y if you are unsure.
 437
 438 config CHECK_STACK
 439         def_bool y
 440         prompt "Detect kernel stack overflow"
 441         help
 442           This option enables the compiler option -mstack-guard and
 443           -mstack-size if they are available. If the compiler supports them
 444           it will emit additional code to each function prolog to trigger
 445           an illegal operation if the kernel stack is about to overflow.
 446
 447           Say N if you are unsure.
 448
 449 config STACK_GUARD
 450         int "Size of the guard area (128-1024)"
 451         range 128 1024
 452         depends on CHECK_STACK
 453         default "256"
 454         help
 455           This allows you to specify the size of the guard area at the lower
 456           end of the kernel stack. If the kernel stack points into the guard
 457           area on function entry an illegal operation is triggered. The size
 458           needs to be a power of 2. Please keep in mind that the size of an
 459           interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
 460           The minimum size for the stack guard should be 256 for 31 bit and
 461           512 for 64 bit.
 462
 463 config WARN_DYNAMIC_STACK
 464         def_bool n
 465         prompt "Emit compiler warnings for function with dynamic stack usage"
 466         help
 467           This option enables the compiler option -mwarn-dynamicstack. If the
 468           compiler supports this options generates warnings for functions
 469           that dynamically allocate stack space using alloca.
 470
 471           Say N if you are unsure.
 472
 473 endmenu
 474
 475 menu "I/O subsystem"
 476
 477 config QDIO
 478         def_tristate y
 479         prompt "QDIO support"
 480         ---help---
 481           This driver provides the Queued Direct I/O base support for
 482           IBM System z.
 483
 484           To compile this driver as a module, choose M here: the
 485           module will be called qdio.
 486
 487           If unsure, say Y.
 488
 489 menuconfig PCI
 490         bool "PCI support"
 491         default n
 492         depends on 64BIT
 493         select PCI_MSI
 494         help
 495           Enable PCI support.
 496
 497 if PCI
 498
 499 config PCI_NR_FUNCTIONS
 500         int "Maximum number of PCI functions (1-4096)"
 501         range 1 4096
 502         default "64"
 503         help
 504           This allows you to specify the maximum number of PCI functions which
 505           this kernel will support.
 506
 507 config PCI_NR_MSI
 508         int "Maximum number of MSI interrupts (64-32768)"
 509         range 64 32768
 510         default "256"
 511         help
 512           This defines the number of virtual interrupts the kernel will
 513           provide for MSI interrupts. If you configure your system to have
 514           too few drivers will fail to allocate MSI interrupts for all
 515           PCI devices.
 516
 517 source "drivers/pci/Kconfig"
 518 source "drivers/pci/pcie/Kconfig"
 519 source "drivers/pci/hotplug/Kconfig"
 520
 521 endif   # PCI
 522
 523 config PCI_DOMAINS
 524         def_bool PCI
 525
 526 config HAS_IOMEM
 527         def_bool PCI
 528
 529 config IOMMU_HELPER
 530         def_bool PCI
 531
 532 config HAS_DMA
 533         def_bool PCI
 534         select HAVE_DMA_API_DEBUG
 535
 536 config NEED_SG_DMA_LENGTH
 537         def_bool PCI
 538
 539 config HAVE_DMA_ATTRS
 540         def_bool PCI
 541
 542 config NEED_DMA_MAP_STATE
 543         def_bool PCI
 544
 545 config CHSC_SCH
 546         def_tristate m
 547         prompt "Support for CHSC subchannels"
 548         help
 549           This driver allows usage of CHSC subchannels. A CHSC subchannel
 550           is usually present on LPAR only.
 551           The driver creates a device /dev/chsc, which may be used to
 552           obtain I/O configuration information about the machine and
 553           to issue asynchronous chsc commands (DANGEROUS).
 554           You will usually only want to use this interface on a special
 555           LPAR designated for system management.
 556
 557           To compile this driver as a module, choose M here: the
 558           module will be called chsc_sch.
 559
 560           If unsure, say N.
 561
 562 config SCM_BUS
 563         def_bool y
 564         depends on 64BIT
 565         prompt "SCM bus driver"
 566         help
 567           Bus driver for Storage Class Memory.
 568
 569 config EADM_SCH
 570         def_tristate m
 571         prompt "Support for EADM subchannels"
 572         depends on SCM_BUS
 573         help
 574           This driver allows usage of EADM subchannels. EADM subchannels act
 575           as a communication vehicle for SCM increments.
 576
 577           To compile this driver as a module, choose M here: the
 578           module will be called eadm_sch.
 579
 580 endmenu
 581
 582 menu "Dump support"
 583
 584 config CRASH_DUMP
 585         bool "kernel crash dumps"
 586         depends on 64BIT && SMP
 587         select KEXEC
 588         select ZFCPDUMP
 589         help
 590           Generate crash dump after being started by kexec.
 591           Crash dump kernels are loaded in the main kernel with kexec-tools
 592           into a specially reserved region and then later executed after
 593           a crash by kdump/kexec.
 594           For more details see Documentation/kdump/kdump.txt
 595
 596 config ZFCPDUMP
 597         def_bool n
 598         prompt "zfcpdump support"
 599         depends on 64BIT && SMP
 600         help
 601           Select this option if you want to build an zfcpdump enabled kernel.
 602           Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
 603
 604 endmenu
 605
 606 menu "Executable file formats / Emulations"
 607
 608 source "fs/Kconfig.binfmt"
 609
 610 config SECCOMP
 611         def_bool y
 612         prompt "Enable seccomp to safely compute untrusted bytecode"
 613         depends on PROC_FS
 614         help
 615           This kernel feature is useful for number crunching applications
 616           that may need to compute untrusted bytecode during their
 617           execution. By using pipes or other transports made available to
 618           the process as file descriptors supporting the read/write
 619           syscalls, it's possible to isolate those applications in
 620           their own address space using seccomp. Once seccomp is
 621           enabled via /proc/<pid>/seccomp, it cannot be disabled
 622           and the task is only allowed to execute a few safe syscalls
 623           defined by each seccomp mode.
 624
 625           If unsure, say Y.
 626
 627 endmenu
 628
 629 menu "Power Management"
 630
 631 config ARCH_HIBERNATION_POSSIBLE
 632         def_bool y if 64BIT
 633
 634 source "kernel/power/Kconfig"
 635
 636 endmenu
 637
 638 source "net/Kconfig"
 639
 640 config PCMCIA
 641         def_bool n
 642
 643 config CCW
 644         def_bool y
 645
 646 source "drivers/Kconfig"
 647
 648 source "fs/Kconfig"
 649
 650 source "arch/s390/Kconfig.debug"
 651
 652 source "security/Kconfig"
 653
 654 source "crypto/Kconfig"
 655
 656 source "lib/Kconfig"
 657
 658 menu "Virtualization"
 659
 660 config PFAULT
 661         def_bool y
 662         prompt "Pseudo page fault support"
 663         help
 664           Select this option, if you want to use PFAULT pseudo page fault
 665           handling under VM. If running native or in LPAR, this option
 666           has no effect. If your VM does not support PFAULT, PAGEEX
 667           pseudo page fault handling will be used.
 668           Note that VM 4.2 supports PFAULT but has a bug in its
 669           implementation that causes some problems.
 670           Everybody who wants to run Linux under VM != VM4.2 should select
 671           this option.
 672
 673 config SHARED_KERNEL
 674         bool "VM shared kernel support"
 675         depends on !JUMP_LABEL
 676         help
 677           Select this option, if you want to share the text segment of the
 678           Linux kernel between different VM guests. This reduces memory
 679           usage with lots of guests but greatly increases kernel size.
 680           Also if a kernel was IPL'ed from a shared segment the kexec system
 681           call will not work.
 682           You should only select this option if you know what you are
 683           doing and want to exploit this feature.
 684
 685 config CMM
 686         def_tristate n
 687         prompt "Cooperative memory management"
 688         help
 689           Select this option, if you want to enable the kernel interface
 690           to reduce the memory size of the system. This is accomplished
 691           by allocating pages of memory and put them "on hold". This only
 692           makes sense for a system running under VM where the unused pages
 693           will be reused by VM for other guest systems. The interface
 694           allows an external monitor to balance memory of many systems.
 695           Everybody who wants to run Linux under VM should select this
 696           option.
 697
 698 config CMM_IUCV
 699         def_bool y
 700         prompt "IUCV special message interface to cooperative memory management"
 701         depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
 702         help
 703           Select this option to enable the special message interface to
 704           the cooperative memory management.
 705
 706 config APPLDATA_BASE
 707         def_bool n
 708         prompt "Linux - VM Monitor Stream, base infrastructure"
 709         depends on PROC_FS
 710         help
 711           This provides a kernel interface for creating and updating z/VM APPLDATA
 712           monitor records. The monitor records are updated at certain time
 713           intervals, once the timer is started.
 714           Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
 715           i.e. enables or disables monitoring on the Linux side.
 716           A custom interval value (in seconds) can be written to
 717           /proc/appldata/interval.
 718
 719           Defaults are 60 seconds interval and timer off.
 720           The /proc entries can also be read from, showing the current settings.
 721
 722 config APPLDATA_MEM
 723         def_tristate m
 724         prompt "Monitor memory management statistics"
 725         depends on APPLDATA_BASE && VM_EVENT_COUNTERS
 726         help
 727           This provides memory management related data to the Linux - VM Monitor
 728           Stream, like paging/swapping rate, memory utilisation, etc.
 729           Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
 730           APPLDATA monitor record, i.e. enables or disables monitoring this record
 731           on the z/VM side.
 732
 733           Default is disabled.
 734           The /proc entry can also be read from, showing the current settings.
 735
 736           This can also be compiled as a module, which will be called
 737           appldata_mem.o.
 738
 739 config APPLDATA_OS
 740         def_tristate m
 741         prompt "Monitor OS statistics"
 742         depends on APPLDATA_BASE
 743         help
 744           This provides OS related data to the Linux - VM Monitor Stream, like
 745           CPU utilisation, etc.
 746           Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
 747           APPLDATA monitor record, i.e. enables or disables monitoring this record
 748           on the z/VM side.
 749
 750           Default is disabled.
 751           This can also be compiled as a module, which will be called
 752           appldata_os.o.
 753
 754 config APPLDATA_NET_SUM
 755         def_tristate m
 756         prompt "Monitor overall network statistics"
 757         depends on APPLDATA_BASE && NET
 758         help
 759           This provides network related data to the Linux - VM Monitor Stream,
 760           currently there is only a total sum of network I/O statistics, no
 761           per-interface data.
 762           Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
 763           APPLDATA monitor record, i.e. enables or disables monitoring this record
 764           on the z/VM side.
 765
 766           Default is disabled.
 767           This can also be compiled as a module, which will be called
 768           appldata_net_sum.o.
 769
 770 config S390_HYPFS_FS
 771         def_bool y
 772         prompt "s390 hypervisor file system support"
 773         select SYS_HYPERVISOR
 774         help
 775           This is a virtual file system intended to provide accounting
 776           information in an s390 hypervisor environment.
 777
 778 source "arch/s390/kvm/Kconfig"
 779
 780 config S390_GUEST
 781         def_bool y
 782         prompt "s390 support for virtio devices"
 783         depends on 64BIT
 784         select TTY
 785         select VIRTUALIZATION
 786         select VIRTIO
 787         select VIRTIO_CONSOLE
 788         help
 789           Enabling this option adds support for virtio based paravirtual device
 790           drivers on s390.
 791
 792           Select this option if you want to run the kernel as a guest under
 793           the KVM hypervisor.
 794
 795 endmenu