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_KERNEL_BZIP2
 120         select HAVE_KERNEL_GZIP
 121         select HAVE_KERNEL_LZMA
 122         select HAVE_KERNEL_LZO
 123         select HAVE_KERNEL_XZ
 124         select HAVE_KPROBES
 125         select HAVE_KRETPROBES
 126         select HAVE_KVM if 64BIT
 127         select HAVE_MEMBLOCK
 128         select HAVE_MEMBLOCK_NODE_MAP
 129         select HAVE_MOD_ARCH_SPECIFIC
 130         select HAVE_OPROFILE
 131         select HAVE_PERF_EVENTS
 132         select HAVE_REGS_AND_STACK_ACCESS_API
 133         select HAVE_SYSCALL_TRACEPOINTS
 134         select HAVE_UID16 if 32BIT
 135         select HAVE_VIRT_CPU_ACCOUNTING
 136         select VIRT_TO_BUS
 137         select INIT_ALL_POSSIBLE
 138         select KTIME_SCALAR if 32BIT
 139         select MODULES_USE_ELF_RELA
 140         select OLD_SIGSUSPEND3
 141         select OLD_SIGACTION
 142         select SYSCTL_EXCEPTION_TRACE
 143         select USE_GENERIC_SMP_HELPERS if SMP
 144         select VIRT_CPU_ACCOUNTING
 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 zEC12"
 231         select HAVE_MARCH_ZEC12_FEATURES if 64BIT
 232         help
 233           Select this to enable optimizations for IBM zEC12 (2827 series). The
 234           kernel will be slightly faster but will not work on older machines.
 235
 236 endchoice
 237
 238 config 64BIT
 239         def_bool y
 240         prompt "64 bit kernel"
 241         help
 242           Select this option if you have an IBM z/Architecture machine
 243           and want to use the 64 bit addressing mode.
 244
 245 config 32BIT
 246         def_bool y if !64BIT
 247
 248 config COMPAT
 249         def_bool y
 250         prompt "Kernel support for 31 bit emulation"
 251         depends on 64BIT
 252         select COMPAT_BINFMT_ELF if BINFMT_ELF
 253         select ARCH_WANT_OLD_COMPAT_IPC
 254         select COMPAT_OLD_SIGACTION
 255         help
 256           Select this option if you want to enable your system kernel to
 257           handle system-calls from ELF binaries for 31 bit ESA.  This option
 258           (and some other stuff like libraries and such) is needed for
 259           executing 31 bit applications.  It is safe to say "Y".
 260
 261 config SYSVIPC_COMPAT
 262         def_bool y if COMPAT && SYSVIPC
 263
 264 config KEYS_COMPAT
 265         def_bool y if COMPAT && KEYS
 266
 267 config SMP
 268         def_bool y
 269         prompt "Symmetric multi-processing support"
 270         ---help---
 271           This enables support for systems with more than one CPU. If you have
 272           a system with only one CPU, like most personal computers, say N. If
 273           you have a system with more than one CPU, say Y.
 274
 275           If you say N here, the kernel will run on single and multiprocessor
 276           machines, but will use only one CPU of a multiprocessor machine. If
 277           you say Y here, the kernel will run on many, but not all,
 278           singleprocessor machines. On a singleprocessor machine, the kernel
 279           will run faster if you say N here.
 280
 281           See also the SMP-HOWTO available at
 282           <http://www.tldp.org/docs.html#howto>.
 283
 284           Even if you don't know what to do here, say Y.
 285
 286 config NR_CPUS
 287         int "Maximum number of CPUs (2-64)"
 288         range 2 64
 289         depends on SMP
 290         default "32" if !64BIT
 291         default "64" if 64BIT
 292         help
 293           This allows you to specify the maximum number of CPUs which this
 294           kernel will support.  The maximum supported value is 64 and the
 295           minimum value which makes sense is 2.
 296
 297           This is purely to save memory - each supported CPU adds
 298           approximately sixteen kilobytes to the kernel image.
 299
 300 config HOTPLUG_CPU
 301         def_bool y
 302         prompt "Support for hot-pluggable CPUs"
 303         depends on SMP
 304         select HOTPLUG
 305         help
 306           Say Y here to be able to turn CPUs off and on. CPUs
 307           can be controlled through /sys/devices/system/cpu/cpu#.
 308           Say N if you want to disable CPU hotplug.
 309
 310 config SCHED_MC
 311         def_bool n
 312
 313 config SCHED_BOOK
 314         def_bool y
 315         prompt "Book scheduler support"
 316         depends on SMP
 317         select SCHED_MC
 318         help
 319           Book scheduler support improves the CPU scheduler's decision making
 320           when dealing with machines that have several books.
 321
 322 source kernel/Kconfig.preempt
 323
 324 config MATHEMU
 325         def_bool y
 326         prompt "IEEE FPU emulation"
 327         depends on MARCH_G5
 328         help
 329           This option is required for IEEE compliant floating point arithmetic
 330           on older ESA/390 machines. Say Y unless you know your machine doesn't
 331           need this.
 332
 333 source kernel/Kconfig.hz
 334
 335 endmenu
 336
 337 menu "Memory setup"
 338
 339 config ARCH_SPARSEMEM_ENABLE
 340         def_bool y
 341         select SPARSEMEM_VMEMMAP_ENABLE
 342         select SPARSEMEM_VMEMMAP
 343         select SPARSEMEM_STATIC if !64BIT
 344
 345 config ARCH_SPARSEMEM_DEFAULT
 346         def_bool y
 347
 348 config ARCH_SELECT_MEMORY_MODEL
 349         def_bool y
 350
 351 config ARCH_ENABLE_MEMORY_HOTPLUG
 352         def_bool y if SPARSEMEM
 353
 354 config ARCH_ENABLE_MEMORY_HOTREMOVE
 355         def_bool y
 356
 357 config FORCE_MAX_ZONEORDER
 358         int
 359         default "9"
 360
 361 source "mm/Kconfig"
 362
 363 config PACK_STACK
 364         def_bool y
 365         prompt "Pack kernel stack"
 366         help
 367           This option enables the compiler option -mkernel-backchain if it
 368           is available. If the option is available the compiler supports
 369           the new stack layout which dramatically reduces the minimum stack
 370           frame size. With an old compiler a non-leaf function needs a
 371           minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
 372           -mkernel-backchain the minimum size drops to 16 byte on 31 bit
 373           and 24 byte on 64 bit.
 374
 375           Say Y if you are unsure.
 376
 377 config CHECK_STACK
 378         def_bool y
 379         prompt "Detect kernel stack overflow"
 380         help
 381           This option enables the compiler option -mstack-guard and
 382           -mstack-size if they are available. If the compiler supports them
 383           it will emit additional code to each function prolog to trigger
 384           an illegal operation if the kernel stack is about to overflow.
 385
 386           Say N if you are unsure.
 387
 388 config STACK_GUARD
 389         int "Size of the guard area (128-1024)"
 390         range 128 1024
 391         depends on CHECK_STACK
 392         default "256"
 393         help
 394           This allows you to specify the size of the guard area at the lower
 395           end of the kernel stack. If the kernel stack points into the guard
 396           area on function entry an illegal operation is triggered. The size
 397           needs to be a power of 2. Please keep in mind that the size of an
 398           interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
 399           The minimum size for the stack guard should be 256 for 31 bit and
 400           512 for 64 bit.
 401
 402 config WARN_DYNAMIC_STACK
 403         def_bool n
 404         prompt "Emit compiler warnings for function with dynamic stack usage"
 405         help
 406           This option enables the compiler option -mwarn-dynamicstack. If the
 407           compiler supports this options generates warnings for functions
 408           that dynamically allocate stack space using alloca.
 409
 410           Say N if you are unsure.
 411
 412 endmenu
 413
 414 menu "I/O subsystem"
 415
 416 config QDIO
 417         def_tristate y
 418         prompt "QDIO support"
 419         ---help---
 420           This driver provides the Queued Direct I/O base support for
 421           IBM System z.
 422
 423           To compile this driver as a module, choose M here: the
 424           module will be called qdio.
 425
 426           If unsure, say Y.
 427
 428 menuconfig PCI
 429         bool "PCI support"
 430         default n
 431         depends on 64BIT
 432         select ARCH_SUPPORTS_MSI
 433         select PCI_MSI
 434         help
 435           Enable PCI support.
 436
 437 if PCI
 438
 439 config PCI_NR_FUNCTIONS
 440         int "Maximum number of PCI functions (1-4096)"
 441         range 1 4096
 442         default "64"
 443         help
 444           This allows you to specify the maximum number of PCI functions which
 445           this kernel will support.
 446
 447 source "drivers/pci/Kconfig"
 448 source "drivers/pci/pcie/Kconfig"
 449 source "drivers/pci/hotplug/Kconfig"
 450
 451 endif   # PCI
 452
 453 config PCI_DOMAINS
 454         def_bool PCI
 455
 456 config HAS_IOMEM
 457         def_bool PCI
 458
 459 config IOMMU_HELPER
 460         def_bool PCI
 461
 462 config HAS_DMA
 463         def_bool PCI
 464         select HAVE_DMA_API_DEBUG
 465
 466 config NEED_SG_DMA_LENGTH
 467         def_bool PCI
 468
 469 config HAVE_DMA_ATTRS
 470         def_bool PCI
 471
 472 config NEED_DMA_MAP_STATE
 473         def_bool PCI
 474
 475 config CHSC_SCH
 476         def_tristate m
 477         prompt "Support for CHSC subchannels"
 478         help
 479           This driver allows usage of CHSC subchannels. A CHSC subchannel
 480           is usually present on LPAR only.
 481           The driver creates a device /dev/chsc, which may be used to
 482           obtain I/O configuration information about the machine and
 483           to issue asynchronous chsc commands (DANGEROUS).
 484           You will usually only want to use this interface on a special
 485           LPAR designated for system management.
 486
 487           To compile this driver as a module, choose M here: the
 488           module will be called chsc_sch.
 489
 490           If unsure, say N.
 491
 492 config SCM_BUS
 493         def_bool y
 494         depends on 64BIT
 495         prompt "SCM bus driver"
 496         help
 497           Bus driver for Storage Class Memory.
 498
 499 config EADM_SCH
 500         def_tristate m
 501         prompt "Support for EADM subchannels"
 502         depends on SCM_BUS
 503         help
 504           This driver allows usage of EADM subchannels. EADM subchannels act
 505           as a communication vehicle for SCM increments.
 506
 507           To compile this driver as a module, choose M here: the
 508           module will be called eadm_sch.
 509
 510 endmenu
 511
 512 menu "Dump support"
 513
 514 config CRASH_DUMP
 515         bool "kernel crash dumps"
 516         depends on 64BIT && SMP
 517         select KEXEC
 518         help
 519           Generate crash dump after being started by kexec.
 520           Crash dump kernels are loaded in the main kernel with kexec-tools
 521           into a specially reserved region and then later executed after
 522           a crash by kdump/kexec.
 523           For more details see Documentation/kdump/kdump.txt
 524
 525 config ZFCPDUMP
 526         def_bool n
 527         prompt "zfcpdump support"
 528         select SMP
 529         help
 530           Select this option if you want to build an zfcpdump enabled kernel.
 531           Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
 532
 533 endmenu
 534
 535 menu "Executable file formats / Emulations"
 536
 537 source "fs/Kconfig.binfmt"
 538
 539 config SECCOMP
 540         def_bool y
 541         prompt "Enable seccomp to safely compute untrusted bytecode"
 542         depends on PROC_FS
 543         help
 544           This kernel feature is useful for number crunching applications
 545           that may need to compute untrusted bytecode during their
 546           execution. By using pipes or other transports made available to
 547           the process as file descriptors supporting the read/write
 548           syscalls, it's possible to isolate those applications in
 549           their own address space using seccomp. Once seccomp is
 550           enabled via /proc/<pid>/seccomp, it cannot be disabled
 551           and the task is only allowed to execute a few safe syscalls
 552           defined by each seccomp mode.
 553
 554           If unsure, say Y.
 555
 556 endmenu
 557
 558 menu "Power Management"
 559
 560 config ARCH_HIBERNATION_POSSIBLE
 561         def_bool y if 64BIT
 562
 563 source "kernel/power/Kconfig"
 564
 565 endmenu
 566
 567 source "net/Kconfig"
 568
 569 config PCMCIA
 570         def_bool n
 571
 572 config CCW
 573         def_bool y
 574
 575 source "drivers/Kconfig"
 576
 577 source "fs/Kconfig"
 578
 579 source "arch/s390/Kconfig.debug"
 580
 581 source "security/Kconfig"
 582
 583 source "crypto/Kconfig"
 584
 585 source "lib/Kconfig"
 586
 587 menu "Virtualization"
 588
 589 config PFAULT
 590         def_bool y
 591         prompt "Pseudo page fault support"
 592         help
 593           Select this option, if you want to use PFAULT pseudo page fault
 594           handling under VM. If running native or in LPAR, this option
 595           has no effect. If your VM does not support PFAULT, PAGEEX
 596           pseudo page fault handling will be used.
 597           Note that VM 4.2 supports PFAULT but has a bug in its
 598           implementation that causes some problems.
 599           Everybody who wants to run Linux under VM != VM4.2 should select
 600           this option.
 601
 602 config SHARED_KERNEL
 603         bool "VM shared kernel support"
 604         depends on !JUMP_LABEL
 605         help
 606           Select this option, if you want to share the text segment of the
 607           Linux kernel between different VM guests. This reduces memory
 608           usage with lots of guests but greatly increases kernel size.
 609           Also if a kernel was IPL'ed from a shared segment the kexec system
 610           call will not work.
 611           You should only select this option if you know what you are
 612           doing and want to exploit this feature.
 613
 614 config CMM
 615         def_tristate n
 616         prompt "Cooperative memory management"
 617         help
 618           Select this option, if you want to enable the kernel interface
 619           to reduce the memory size of the system. This is accomplished
 620           by allocating pages of memory and put them "on hold". This only
 621           makes sense for a system running under VM where the unused pages
 622           will be reused by VM for other guest systems. The interface
 623           allows an external monitor to balance memory of many systems.
 624           Everybody who wants to run Linux under VM should select this
 625           option.
 626
 627 config CMM_IUCV
 628         def_bool y
 629         prompt "IUCV special message interface to cooperative memory management"
 630         depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
 631         help
 632           Select this option to enable the special message interface to
 633           the cooperative memory management.
 634
 635 config APPLDATA_BASE
 636         def_bool n
 637         prompt "Linux - VM Monitor Stream, base infrastructure"
 638         depends on PROC_FS
 639         help
 640           This provides a kernel interface for creating and updating z/VM APPLDATA
 641           monitor records. The monitor records are updated at certain time
 642           intervals, once the timer is started.
 643           Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
 644           i.e. enables or disables monitoring on the Linux side.
 645           A custom interval value (in seconds) can be written to
 646           /proc/appldata/interval.
 647
 648           Defaults are 60 seconds interval and timer off.
 649           The /proc entries can also be read from, showing the current settings.
 650
 651 config APPLDATA_MEM
 652         def_tristate m
 653         prompt "Monitor memory management statistics"
 654         depends on APPLDATA_BASE && VM_EVENT_COUNTERS
 655         help
 656           This provides memory management related data to the Linux - VM Monitor
 657           Stream, like paging/swapping rate, memory utilisation, etc.
 658           Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
 659           APPLDATA monitor record, i.e. enables or disables monitoring this record
 660           on the z/VM side.
 661
 662           Default is disabled.
 663           The /proc entry can also be read from, showing the current settings.
 664
 665           This can also be compiled as a module, which will be called
 666           appldata_mem.o.
 667
 668 config APPLDATA_OS
 669         def_tristate m
 670         prompt "Monitor OS statistics"
 671         depends on APPLDATA_BASE
 672         help
 673           This provides OS related data to the Linux - VM Monitor Stream, like
 674           CPU utilisation, etc.
 675           Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
 676           APPLDATA monitor record, i.e. enables or disables monitoring this record
 677           on the z/VM side.
 678
 679           Default is disabled.
 680           This can also be compiled as a module, which will be called
 681           appldata_os.o.
 682
 683 config APPLDATA_NET_SUM
 684         def_tristate m
 685         prompt "Monitor overall network statistics"
 686         depends on APPLDATA_BASE && NET
 687         help
 688           This provides network related data to the Linux - VM Monitor Stream,
 689           currently there is only a total sum of network I/O statistics, no
 690           per-interface data.
 691           Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
 692           APPLDATA monitor record, i.e. enables or disables monitoring this record
 693           on the z/VM side.
 694
 695           Default is disabled.
 696           This can also be compiled as a module, which will be called
 697           appldata_net_sum.o.
 698
 699 config S390_HYPFS_FS
 700         def_bool y
 701         prompt "s390 hypervisor file system support"
 702         select SYS_HYPERVISOR
 703         help
 704           This is a virtual file system intended to provide accounting
 705           information in an s390 hypervisor environment.
 706
 707 source "arch/s390/kvm/Kconfig"
 708
 709 config S390_GUEST
 710         def_bool y
 711         prompt "s390 support for virtio devices"
 712         depends on 64BIT
 713         select VIRTUALIZATION
 714         select VIRTIO
 715         select VIRTIO_CONSOLE
 716         help
 717           Enabling this option adds support for virtio based paravirtual device
 718           drivers on s390.
 719
 720           Select this option if you want to run the kernel as a guest under
 721           the KVM hypervisor.
 722
 723 endmenu