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