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_HAVE_NMI_SAFE_CMPXCHG
  66         select ARCH_INLINE_READ_LOCK
  67         select ARCH_INLINE_READ_LOCK_BH
  68         select ARCH_INLINE_READ_LOCK_IRQ
  69         select ARCH_INLINE_READ_LOCK_IRQSAVE
  70         select ARCH_INLINE_READ_TRYLOCK
  71         select ARCH_INLINE_READ_UNLOCK
  72         select ARCH_INLINE_READ_UNLOCK_BH
  73         select ARCH_INLINE_READ_UNLOCK_IRQ
  74         select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
  75         select ARCH_INLINE_SPIN_LOCK
  76         select ARCH_INLINE_SPIN_LOCK_BH
  77         select ARCH_INLINE_SPIN_LOCK_IRQ
  78         select ARCH_INLINE_SPIN_LOCK_IRQSAVE
  79         select ARCH_INLINE_SPIN_TRYLOCK
  80         select ARCH_INLINE_SPIN_TRYLOCK_BH
  81         select ARCH_INLINE_SPIN_UNLOCK
  82         select ARCH_INLINE_SPIN_UNLOCK_BH
  83         select ARCH_INLINE_SPIN_UNLOCK_IRQ
  84         select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
  85         select ARCH_INLINE_WRITE_LOCK
  86         select ARCH_INLINE_WRITE_LOCK_BH
  87         select ARCH_INLINE_WRITE_LOCK_IRQ
  88         select ARCH_INLINE_WRITE_LOCK_IRQSAVE
  89         select ARCH_INLINE_WRITE_TRYLOCK
  90         select ARCH_INLINE_WRITE_UNLOCK
  91         select ARCH_INLINE_WRITE_UNLOCK_BH
  92         select ARCH_INLINE_WRITE_UNLOCK_IRQ
  93         select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
  94         select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
  95         select ARCH_SAVE_PAGE_KEYS if HIBERNATION
  96         select ARCH_WANT_IPC_PARSE_VERSION
  97         select BUILDTIME_EXTABLE_SORT
  98         select CLONE_BACKWARDS2
  99         select GENERIC_CLOCKEVENTS
 100         select GENERIC_CPU_DEVICES if !SMP
 101         select GENERIC_SMP_IDLE_THREAD
 102         select GENERIC_TIME_VSYSCALL_OLD
 103         select HAVE_ALIGNED_STRUCT_PAGE if SLUB
 104         select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
 105         select HAVE_ARCH_MUTEX_CPU_RELAX
 106         select HAVE_ARCH_SECCOMP_FILTER
 107         select HAVE_ARCH_TRACEHOOK
 108         select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
 109         select HAVE_BPF_JIT if 64BIT && PACK_STACK
 110         select HAVE_CMPXCHG_DOUBLE
 111         select HAVE_CMPXCHG_LOCAL
 112         select HAVE_C_RECORDMCOUNT
 113         select HAVE_DEBUG_KMEMLEAK
 114         select HAVE_DYNAMIC_FTRACE
 115         select HAVE_FTRACE_MCOUNT_RECORD
 116         select HAVE_FUNCTION_GRAPH_TRACER
 117         select HAVE_FUNCTION_TRACER
 118         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
 119         select HAVE_FUTEX_CMPXCHG if FUTEX
 120         select HAVE_KERNEL_BZIP2
 121         select HAVE_KERNEL_GZIP
 122         select HAVE_KERNEL_LZMA
 123         select HAVE_KERNEL_LZO
 124         select HAVE_KERNEL_XZ
 125         select HAVE_KPROBES
 126         select HAVE_KRETPROBES
 127         select HAVE_KVM if 64BIT
 128         select HAVE_MEMBLOCK
 129         select HAVE_MEMBLOCK_NODE_MAP
 130         select HAVE_MOD_ARCH_SPECIFIC
 131         select HAVE_OPROFILE
 132         select HAVE_PERF_EVENTS
 133         select HAVE_REGS_AND_STACK_ACCESS_API
 134         select HAVE_SYSCALL_TRACEPOINTS
 135         select HAVE_UID16 if 32BIT
 136         select HAVE_VIRT_CPU_ACCOUNTING
 137         select VIRT_TO_BUS
 138         select INIT_ALL_POSSIBLE
 139         select KTIME_SCALAR if 32BIT
 140         select MODULES_USE_ELF_RELA
 141         select OLD_SIGSUSPEND3
 142         select OLD_SIGACTION
 143         select SYSCTL_EXCEPTION_TRACE
 144         select USE_GENERIC_SMP_HELPERS if SMP
 145         select VIRT_CPU_ACCOUNTING
 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 64BIT
 241         def_bool y
 242         prompt "64 bit kernel"
 243         help
 244           Select this option if you have an IBM z/Architecture machine
 245           and want to use the 64 bit addressing mode.
 246
 247 config 32BIT
 248         def_bool y if !64BIT
 249
 250 config COMPAT
 251         def_bool y
 252         prompt "Kernel support for 31 bit emulation"
 253         depends on 64BIT
 254         select COMPAT_BINFMT_ELF if BINFMT_ELF
 255         select ARCH_WANT_OLD_COMPAT_IPC
 256         select COMPAT_OLD_SIGACTION
 257         help
 258           Select this option if you want to enable your system kernel to
 259           handle system-calls from ELF binaries for 31 bit ESA.  This option
 260           (and some other stuff like libraries and such) is needed for
 261           executing 31 bit applications.  It is safe to say "Y".
 262
 263 config SYSVIPC_COMPAT
 264         def_bool y if COMPAT && SYSVIPC
 265
 266 config KEYS_COMPAT
 267         def_bool y if COMPAT && KEYS
 268
 269 config SMP
 270         def_bool y
 271         prompt "Symmetric multi-processing support"
 272         ---help---
 273           This enables support for systems with more than one CPU. If you have
 274           a system with only one CPU, like most personal computers, say N. If
 275           you have a system with more than one CPU, say Y.
 276
 277           If you say N here, the kernel will run on single and multiprocessor
 278           machines, but will use only one CPU of a multiprocessor machine. If
 279           you say Y here, the kernel will run on many, but not all,
 280           singleprocessor machines. On a singleprocessor machine, the kernel
 281           will run faster if you say N here.
 282
 283           See also the SMP-HOWTO available at
 284           <http://www.tldp.org/docs.html#howto>.
 285
 286           Even if you don't know what to do here, say Y.
 287
 288 config NR_CPUS
 289         int "Maximum number of CPUs (2-64)"
 290         range 2 64
 291         depends on SMP
 292         default "32" if !64BIT
 293         default "64" if 64BIT
 294         help
 295           This allows you to specify the maximum number of CPUs which this
 296           kernel will support.  The maximum supported value is 64 and the
 297           minimum value which makes sense is 2.
 298
 299           This is purely to save memory - each supported CPU adds
 300           approximately sixteen kilobytes to the kernel image.
 301
 302 config HOTPLUG_CPU
 303         def_bool y
 304         prompt "Support for hot-pluggable CPUs"
 305         depends on SMP
 306         select HOTPLUG
 307         help
 308           Say Y here to be able to turn CPUs off and on. CPUs
 309           can be controlled through /sys/devices/system/cpu/cpu#.
 310           Say N if you want to disable CPU hotplug.
 311
 312 config SCHED_MC
 313         def_bool n
 314
 315 config SCHED_BOOK
 316         def_bool y
 317         prompt "Book scheduler support"
 318         depends on SMP
 319         select SCHED_MC
 320         help
 321           Book scheduler support improves the CPU scheduler's decision making
 322           when dealing with machines that have several books.
 323
 324 source kernel/Kconfig.preempt
 325
 326 config MATHEMU
 327         def_bool y
 328         prompt "IEEE FPU emulation"
 329         depends on MARCH_G5
 330         help
 331           This option is required for IEEE compliant floating point arithmetic
 332           on older ESA/390 machines. Say Y unless you know your machine doesn't
 333           need this.
 334
 335 source kernel/Kconfig.hz
 336
 337 endmenu
 338
 339 menu "Memory setup"
 340
 341 config ARCH_SPARSEMEM_ENABLE
 342         def_bool y
 343         select SPARSEMEM_VMEMMAP_ENABLE
 344         select SPARSEMEM_VMEMMAP
 345         select SPARSEMEM_STATIC if !64BIT
 346
 347 config ARCH_SPARSEMEM_DEFAULT
 348         def_bool y
 349
 350 config ARCH_SELECT_MEMORY_MODEL
 351         def_bool y
 352
 353 config ARCH_ENABLE_MEMORY_HOTPLUG
 354         def_bool y if SPARSEMEM
 355
 356 config ARCH_ENABLE_MEMORY_HOTREMOVE
 357         def_bool y
 358
 359 config FORCE_MAX_ZONEORDER
 360         int
 361         default "9"
 362
 363 source "mm/Kconfig"
 364
 365 config PACK_STACK
 366         def_bool y
 367         prompt "Pack kernel stack"
 368         help
 369           This option enables the compiler option -mkernel-backchain if it
 370           is available. If the option is available the compiler supports
 371           the new stack layout which dramatically reduces the minimum stack
 372           frame size. With an old compiler a non-leaf function needs a
 373           minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
 374           -mkernel-backchain the minimum size drops to 16 byte on 31 bit
 375           and 24 byte on 64 bit.
 376
 377           Say Y if you are unsure.
 378
 379 config CHECK_STACK
 380         def_bool y
 381         prompt "Detect kernel stack overflow"
 382         help
 383           This option enables the compiler option -mstack-guard and
 384           -mstack-size if they are available. If the compiler supports them
 385           it will emit additional code to each function prolog to trigger
 386           an illegal operation if the kernel stack is about to overflow.
 387
 388           Say N if you are unsure.
 389
 390 config STACK_GUARD
 391         int "Size of the guard area (128-1024)"
 392         range 128 1024
 393         depends on CHECK_STACK
 394         default "256"
 395         help
 396           This allows you to specify the size of the guard area at the lower
 397           end of the kernel stack. If the kernel stack points into the guard
 398           area on function entry an illegal operation is triggered. The size
 399           needs to be a power of 2. Please keep in mind that the size of an
 400           interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
 401           The minimum size for the stack guard should be 256 for 31 bit and
 402           512 for 64 bit.
 403
 404 config WARN_DYNAMIC_STACK
 405         def_bool n
 406         prompt "Emit compiler warnings for function with dynamic stack usage"
 407         help
 408           This option enables the compiler option -mwarn-dynamicstack. If the
 409           compiler supports this options generates warnings for functions
 410           that dynamically allocate stack space using alloca.
 411
 412           Say N if you are unsure.
 413
 414 endmenu
 415
 416 menu "I/O subsystem"
 417
 418 config QDIO
 419         def_tristate y
 420         prompt "QDIO support"
 421         ---help---
 422           This driver provides the Queued Direct I/O base support for
 423           IBM System z.
 424
 425           To compile this driver as a module, choose M here: the
 426           module will be called qdio.
 427
 428           If unsure, say Y.
 429
 430 menuconfig PCI
 431         bool "PCI support"
 432         default n
 433         depends on 64BIT
 434         select ARCH_SUPPORTS_MSI
 435         select PCI_MSI
 436         help
 437           Enable PCI support.
 438
 439 if PCI
 440
 441 config PCI_NR_FUNCTIONS
 442         int "Maximum number of PCI functions (1-4096)"
 443         range 1 4096
 444         default "64"
 445         help
 446           This allows you to specify the maximum number of PCI functions which
 447           this kernel will support.
 448
 449 source "drivers/pci/Kconfig"
 450 source "drivers/pci/pcie/Kconfig"
 451 source "drivers/pci/hotplug/Kconfig"
 452
 453 endif   # PCI
 454
 455 config PCI_DOMAINS
 456         def_bool PCI
 457
 458 config HAS_IOMEM
 459         def_bool PCI
 460
 461 config IOMMU_HELPER
 462         def_bool PCI
 463
 464 config HAS_DMA
 465         def_bool PCI
 466         select HAVE_DMA_API_DEBUG
 467
 468 config NEED_SG_DMA_LENGTH
 469         def_bool PCI
 470
 471 config HAVE_DMA_ATTRS
 472         def_bool PCI
 473
 474 config NEED_DMA_MAP_STATE
 475         def_bool PCI
 476
 477 config CHSC_SCH
 478         def_tristate m
 479         prompt "Support for CHSC subchannels"
 480         help
 481           This driver allows usage of CHSC subchannels. A CHSC subchannel
 482           is usually present on LPAR only.
 483           The driver creates a device /dev/chsc, which may be used to
 484           obtain I/O configuration information about the machine and
 485           to issue asynchronous chsc commands (DANGEROUS).
 486           You will usually only want to use this interface on a special
 487           LPAR designated for system management.
 488
 489           To compile this driver as a module, choose M here: the
 490           module will be called chsc_sch.
 491
 492           If unsure, say N.
 493
 494 config SCM_BUS
 495         def_bool y
 496         depends on 64BIT
 497         prompt "SCM bus driver"
 498         help
 499           Bus driver for Storage Class Memory.
 500
 501 config EADM_SCH
 502         def_tristate m
 503         prompt "Support for EADM subchannels"
 504         depends on SCM_BUS
 505         help
 506           This driver allows usage of EADM subchannels. EADM subchannels act
 507           as a communication vehicle for SCM increments.
 508
 509           To compile this driver as a module, choose M here: the
 510           module will be called eadm_sch.
 511
 512 endmenu
 513
 514 menu "Dump support"
 515
 516 config CRASH_DUMP
 517         bool "kernel crash dumps"
 518         depends on 64BIT && SMP
 519         select KEXEC
 520         help
 521           Generate crash dump after being started by kexec.
 522           Crash dump kernels are loaded in the main kernel with kexec-tools
 523           into a specially reserved region and then later executed after
 524           a crash by kdump/kexec.
 525           For more details see Documentation/kdump/kdump.txt
 526
 527 config ZFCPDUMP
 528         def_bool n
 529         prompt "zfcpdump support"
 530         select SMP
 531         help
 532           Select this option if you want to build an zfcpdump enabled kernel.
 533           Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
 534
 535 endmenu
 536
 537 menu "Executable file formats / Emulations"
 538
 539 source "fs/Kconfig.binfmt"
 540
 541 config SECCOMP
 542         def_bool y
 543         prompt "Enable seccomp to safely compute untrusted bytecode"
 544         depends on PROC_FS
 545         help
 546           This kernel feature is useful for number crunching applications
 547           that may need to compute untrusted bytecode during their
 548           execution. By using pipes or other transports made available to
 549           the process as file descriptors supporting the read/write
 550           syscalls, it's possible to isolate those applications in
 551           their own address space using seccomp. Once seccomp is
 552           enabled via /proc/<pid>/seccomp, it cannot be disabled
 553           and the task is only allowed to execute a few safe syscalls
 554           defined by each seccomp mode.
 555
 556           If unsure, say Y.
 557
 558 endmenu
 559
 560 menu "Power Management"
 561
 562 config ARCH_HIBERNATION_POSSIBLE
 563         def_bool y if 64BIT
 564
 565 source "kernel/power/Kconfig"
 566
 567 endmenu
 568
 569 source "net/Kconfig"
 570
 571 config PCMCIA
 572         def_bool n
 573
 574 config CCW
 575         def_bool y
 576
 577 source "drivers/Kconfig"
 578
 579 source "fs/Kconfig"
 580
 581 source "arch/s390/Kconfig.debug"
 582
 583 source "security/Kconfig"
 584
 585 source "crypto/Kconfig"
 586
 587 source "lib/Kconfig"
 588
 589 menu "Virtualization"
 590
 591 config PFAULT
 592         def_bool y
 593         prompt "Pseudo page fault support"
 594         help
 595           Select this option, if you want to use PFAULT pseudo page fault
 596           handling under VM. If running native or in LPAR, this option
 597           has no effect. If your VM does not support PFAULT, PAGEEX
 598           pseudo page fault handling will be used.
 599           Note that VM 4.2 supports PFAULT but has a bug in its
 600           implementation that causes some problems.
 601           Everybody who wants to run Linux under VM != VM4.2 should select
 602           this option.
 603
 604 config SHARED_KERNEL
 605         bool "VM shared kernel support"
 606         depends on !JUMP_LABEL
 607         help
 608           Select this option, if you want to share the text segment of the
 609           Linux kernel between different VM guests. This reduces memory
 610           usage with lots of guests but greatly increases kernel size.
 611           Also if a kernel was IPL'ed from a shared segment the kexec system
 612           call will not work.
 613           You should only select this option if you know what you are
 614           doing and want to exploit this feature.
 615
 616 config CMM
 617         def_tristate n
 618         prompt "Cooperative memory management"
 619         help
 620           Select this option, if you want to enable the kernel interface
 621           to reduce the memory size of the system. This is accomplished
 622           by allocating pages of memory and put them "on hold". This only
 623           makes sense for a system running under VM where the unused pages
 624           will be reused by VM for other guest systems. The interface
 625           allows an external monitor to balance memory of many systems.
 626           Everybody who wants to run Linux under VM should select this
 627           option.
 628
 629 config CMM_IUCV
 630         def_bool y
 631         prompt "IUCV special message interface to cooperative memory management"
 632         depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
 633         help
 634           Select this option to enable the special message interface to
 635           the cooperative memory management.
 636
 637 config APPLDATA_BASE
 638         def_bool n
 639         prompt "Linux - VM Monitor Stream, base infrastructure"
 640         depends on PROC_FS
 641         help
 642           This provides a kernel interface for creating and updating z/VM APPLDATA
 643           monitor records. The monitor records are updated at certain time
 644           intervals, once the timer is started.
 645           Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
 646           i.e. enables or disables monitoring on the Linux side.
 647           A custom interval value (in seconds) can be written to
 648           /proc/appldata/interval.
 649
 650           Defaults are 60 seconds interval and timer off.
 651           The /proc entries can also be read from, showing the current settings.
 652
 653 config APPLDATA_MEM
 654         def_tristate m
 655         prompt "Monitor memory management statistics"
 656         depends on APPLDATA_BASE && VM_EVENT_COUNTERS
 657         help
 658           This provides memory management related data to the Linux - VM Monitor
 659           Stream, like paging/swapping rate, memory utilisation, etc.
 660           Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
 661           APPLDATA monitor record, i.e. enables or disables monitoring this record
 662           on the z/VM side.
 663
 664           Default is disabled.
 665           The /proc entry can also be read from, showing the current settings.
 666
 667           This can also be compiled as a module, which will be called
 668           appldata_mem.o.
 669
 670 config APPLDATA_OS
 671         def_tristate m
 672         prompt "Monitor OS statistics"
 673         depends on APPLDATA_BASE
 674         help
 675           This provides OS related data to the Linux - VM Monitor Stream, like
 676           CPU utilisation, etc.
 677           Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
 678           APPLDATA monitor record, i.e. enables or disables monitoring this record
 679           on the z/VM side.
 680
 681           Default is disabled.
 682           This can also be compiled as a module, which will be called
 683           appldata_os.o.
 684
 685 config APPLDATA_NET_SUM
 686         def_tristate m
 687         prompt "Monitor overall network statistics"
 688         depends on APPLDATA_BASE && NET
 689         help
 690           This provides network related data to the Linux - VM Monitor Stream,
 691           currently there is only a total sum of network I/O statistics, no
 692           per-interface data.
 693           Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
 694           APPLDATA monitor record, i.e. enables or disables monitoring this record
 695           on the z/VM side.
 696
 697           Default is disabled.
 698           This can also be compiled as a module, which will be called
 699           appldata_net_sum.o.
 700
 701 config S390_HYPFS_FS
 702         def_bool y
 703         prompt "s390 hypervisor file system support"
 704         select SYS_HYPERVISOR
 705         help
 706           This is a virtual file system intended to provide accounting
 707           information in an s390 hypervisor environment.
 708
 709 source "arch/s390/kvm/Kconfig"
 710
 711 config S390_GUEST
 712         def_bool y
 713         prompt "s390 support for virtio devices"
 714         depends on 64BIT
 715         select VIRTUALIZATION
 716         select VIRTIO
 717         select VIRTIO_CONSOLE
 718         help
 719           Enabling this option adds support for virtio based paravirtual device
 720           drivers on s390.
 721
 722           Select this option if you want to run the kernel as a guest under
 723           the KVM hypervisor.
 724
 725 endmenu