linux/arch/s390/Kconfig
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   1config MMU
   2        def_bool y
   3
   4config ZONE_DMA
   5        def_bool y
   6
   7config LOCKDEP_SUPPORT
   8        def_bool y
   9
  10config STACKTRACE_SUPPORT
  11        def_bool y
  12
  13config HAVE_LATENCYTOP_SUPPORT
  14        def_bool y
  15
  16config RWSEM_GENERIC_SPINLOCK
  17        bool
  18
  19config RWSEM_XCHGADD_ALGORITHM
  20        def_bool y
  21
  22config ARCH_HAS_ILOG2_U32
  23        def_bool n
  24
  25config ARCH_HAS_ILOG2_U64
  26        def_bool n
  27
  28config GENERIC_HWEIGHT
  29        def_bool y
  30
  31config GENERIC_BUG
  32        def_bool y if BUG
  33
  34config GENERIC_BUG_RELATIVE_POINTERS
  35        def_bool y
  36
  37config ARCH_DMA_ADDR_T_64BIT
  38        def_bool 64BIT
  39
  40config GENERIC_LOCKBREAK
  41        def_bool y if SMP && PREEMPT
  42
  43config PGSTE
  44        def_bool y if KVM
  45
  46config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  47        def_bool y
  48
  49config KEXEC
  50        def_bool y
  51
  52config AUDIT_ARCH
  53        def_bool y
  54
  55config NO_IOPORT
  56        def_bool y
  57
  58config PCI_QUIRKS
  59        def_bool n
  60
  61config 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_SAVE_PAGE_KEYS if HIBERNATION
  95        select ARCH_WANT_IPC_PARSE_VERSION
  96        select BUILDTIME_EXTABLE_SORT
  97        select CLONE_BACKWARDS2
  98        select GENERIC_CLOCKEVENTS
  99        select GENERIC_CPU_DEVICES if !SMP
 100        select GENERIC_KERNEL_THREAD
 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_SYSCALL_WRAPPERS
 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
 147config SCHED_OMIT_FRAME_POINTER
 148        def_bool y
 149
 150source "init/Kconfig"
 151
 152source "kernel/Kconfig.freezer"
 153
 154menu "Processor type and features"
 155
 156config HAVE_MARCH_Z900_FEATURES
 157        def_bool n
 158
 159config HAVE_MARCH_Z990_FEATURES
 160        def_bool n
 161        select HAVE_MARCH_Z900_FEATURES
 162
 163config HAVE_MARCH_Z9_109_FEATURES
 164        def_bool n
 165        select HAVE_MARCH_Z990_FEATURES
 166
 167config HAVE_MARCH_Z10_FEATURES
 168        def_bool n
 169        select HAVE_MARCH_Z9_109_FEATURES
 170
 171config HAVE_MARCH_Z196_FEATURES
 172        def_bool n
 173        select HAVE_MARCH_Z10_FEATURES
 174
 175config HAVE_MARCH_ZEC12_FEATURES
 176        def_bool n
 177        select HAVE_MARCH_Z196_FEATURES
 178
 179choice
 180        prompt "Processor type"
 181        default MARCH_G5
 182
 183config 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
 190config 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
 198config 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
 206config 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
 214config 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
 222config 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
 230config MARCH_ZEC12
 231        bool "IBM zEC12"
 232        select HAVE_MARCH_ZEC12_FEATURES if 64BIT
 233        help
 234          Select this to enable optimizations for IBM zEC12 (2827 series). The
 235          kernel will be slightly faster but will not work on older machines.
 236
 237endchoice
 238
 239config 64BIT
 240        def_bool y
 241        prompt "64 bit kernel"
 242        help
 243          Select this option if you have an IBM z/Architecture machine
 244          and want to use the 64 bit addressing mode.
 245
 246config 32BIT
 247        def_bool y if !64BIT
 248
 249config COMPAT
 250        def_bool y
 251        prompt "Kernel support for 31 bit emulation"
 252        depends on 64BIT
 253        select COMPAT_BINFMT_ELF if BINFMT_ELF
 254        select ARCH_WANT_OLD_COMPAT_IPC
 255        select COMPAT_OLD_SIGACTION
 256        help
 257          Select this option if you want to enable your system kernel to
 258          handle system-calls from ELF binaries for 31 bit ESA.  This option
 259          (and some other stuff like libraries and such) is needed for
 260          executing 31 bit applications.  It is safe to say "Y".
 261
 262config SYSVIPC_COMPAT
 263        def_bool y if COMPAT && SYSVIPC
 264
 265config KEYS_COMPAT
 266        def_bool y if COMPAT && KEYS
 267
 268config SMP
 269        def_bool y
 270        prompt "Symmetric multi-processing support"
 271        ---help---
 272          This enables support for systems with more than one CPU. If you have
 273          a system with only one CPU, like most personal computers, say N. If
 274          you have a system with more than one CPU, say Y.
 275
 276          If you say N here, the kernel will run on single and multiprocessor
 277          machines, but will use only one CPU of a multiprocessor machine. If
 278          you say Y here, the kernel will run on many, but not all,
 279          singleprocessor machines. On a singleprocessor machine, the kernel
 280          will run faster if you say N here.
 281
 282          See also the SMP-HOWTO available at
 283          <http://www.tldp.org/docs.html#howto>.
 284
 285          Even if you don't know what to do here, say Y.
 286
 287config NR_CPUS
 288        int "Maximum number of CPUs (2-64)"
 289        range 2 64
 290        depends on SMP
 291        default "32" if !64BIT
 292        default "64" if 64BIT
 293        help
 294          This allows you to specify the maximum number of CPUs which this
 295          kernel will support.  The maximum supported value is 64 and the
 296          minimum value which makes sense is 2.
 297
 298          This is purely to save memory - each supported CPU adds
 299          approximately sixteen kilobytes to the kernel image.
 300
 301config HOTPLUG_CPU
 302        def_bool y
 303        prompt "Support for hot-pluggable CPUs"
 304        depends on SMP
 305        select HOTPLUG
 306        help
 307          Say Y here to be able to turn CPUs off and on. CPUs
 308          can be controlled through /sys/devices/system/cpu/cpu#.
 309          Say N if you want to disable CPU hotplug.
 310
 311config SCHED_MC
 312        def_bool n
 313
 314config SCHED_BOOK
 315        def_bool y
 316        prompt "Book scheduler support"
 317        depends on SMP
 318        select SCHED_MC
 319        help
 320          Book scheduler support improves the CPU scheduler's decision making
 321          when dealing with machines that have several books.
 322
 323source kernel/Kconfig.preempt
 324
 325config MATHEMU
 326        def_bool y
 327        prompt "IEEE FPU emulation"
 328        depends on MARCH_G5
 329        help
 330          This option is required for IEEE compliant floating point arithmetic
 331          on older ESA/390 machines. Say Y unless you know your machine doesn't
 332          need this.
 333
 334source kernel/Kconfig.hz
 335
 336endmenu
 337
 338menu "Memory setup"
 339
 340config ARCH_SPARSEMEM_ENABLE
 341        def_bool y
 342        select SPARSEMEM_VMEMMAP_ENABLE
 343        select SPARSEMEM_VMEMMAP
 344        select SPARSEMEM_STATIC if !64BIT
 345
 346config ARCH_SPARSEMEM_DEFAULT
 347        def_bool y
 348
 349config ARCH_SELECT_MEMORY_MODEL
 350        def_bool y
 351
 352config ARCH_ENABLE_MEMORY_HOTPLUG
 353        def_bool y if SPARSEMEM
 354
 355config ARCH_ENABLE_MEMORY_HOTREMOVE
 356        def_bool y
 357
 358config FORCE_MAX_ZONEORDER
 359        int
 360        default "9"
 361
 362source "mm/Kconfig"
 363
 364config PACK_STACK
 365        def_bool y
 366        prompt "Pack kernel stack"
 367        help
 368          This option enables the compiler option -mkernel-backchain if it
 369          is available. If the option is available the compiler supports
 370          the new stack layout which dramatically reduces the minimum stack
 371          frame size. With an old compiler a non-leaf function needs a
 372          minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
 373          -mkernel-backchain the minimum size drops to 16 byte on 31 bit
 374          and 24 byte on 64 bit.
 375
 376          Say Y if you are unsure.
 377
 378config SMALL_STACK
 379        def_bool n
 380        prompt "Use 8kb for kernel stack instead of 16kb"
 381        depends on PACK_STACK && 64BIT && !LOCKDEP
 382        help
 383          If you say Y here and the compiler supports the -mkernel-backchain
 384          option the kernel will use a smaller kernel stack size. The reduced
 385          size is 8kb instead of 16kb. This allows to run more threads on a
 386          system and reduces the pressure on the memory management for higher
 387          order page allocations.
 388
 389          Say N if you are unsure.
 390
 391config CHECK_STACK
 392        def_bool y
 393        prompt "Detect kernel stack overflow"
 394        help
 395          This option enables the compiler option -mstack-guard and
 396          -mstack-size if they are available. If the compiler supports them
 397          it will emit additional code to each function prolog to trigger
 398          an illegal operation if the kernel stack is about to overflow.
 399
 400          Say N if you are unsure.
 401
 402config STACK_GUARD
 403        int "Size of the guard area (128-1024)"
 404        range 128 1024
 405        depends on CHECK_STACK
 406        default "256"
 407        help
 408          This allows you to specify the size of the guard area at the lower
 409          end of the kernel stack. If the kernel stack points into the guard
 410          area on function entry an illegal operation is triggered. The size
 411          needs to be a power of 2. Please keep in mind that the size of an
 412          interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
 413          The minimum size for the stack guard should be 256 for 31 bit and
 414          512 for 64 bit.
 415
 416config WARN_DYNAMIC_STACK
 417        def_bool n
 418        prompt "Emit compiler warnings for function with dynamic stack usage"
 419        help
 420          This option enables the compiler option -mwarn-dynamicstack. If the
 421          compiler supports this options generates warnings for functions
 422          that dynamically allocate stack space using alloca.
 423
 424          Say N if you are unsure.
 425
 426endmenu
 427
 428menu "I/O subsystem"
 429
 430config QDIO
 431        def_tristate y
 432        prompt "QDIO support"
 433        ---help---
 434          This driver provides the Queued Direct I/O base support for
 435          IBM System z.
 436
 437          To compile this driver as a module, choose M here: the
 438          module will be called qdio.
 439
 440          If unsure, say Y.
 441
 442menuconfig PCI
 443        bool "PCI support"
 444        default n
 445        depends on 64BIT
 446        select ARCH_SUPPORTS_MSI
 447        select PCI_MSI
 448        help
 449          Enable PCI support.
 450
 451if PCI
 452
 453config PCI_NR_FUNCTIONS
 454        int "Maximum number of PCI functions (1-4096)"
 455        range 1 4096
 456        default "64"
 457        help
 458          This allows you to specify the maximum number of PCI functions which
 459          this kernel will support.
 460
 461source "drivers/pci/Kconfig"
 462source "drivers/pci/pcie/Kconfig"
 463source "drivers/pci/hotplug/Kconfig"
 464
 465endif   # PCI
 466
 467config PCI_DOMAINS
 468        def_bool PCI
 469
 470config HAS_IOMEM
 471        def_bool PCI
 472
 473config IOMMU_HELPER
 474        def_bool PCI
 475
 476config HAS_DMA
 477        def_bool PCI
 478        select HAVE_DMA_API_DEBUG
 479
 480config NEED_SG_DMA_LENGTH
 481        def_bool PCI
 482
 483config HAVE_DMA_ATTRS
 484        def_bool PCI
 485
 486config NEED_DMA_MAP_STATE
 487        def_bool PCI
 488
 489config CHSC_SCH
 490        def_tristate m
 491        prompt "Support for CHSC subchannels"
 492        help
 493          This driver allows usage of CHSC subchannels. A CHSC subchannel
 494          is usually present on LPAR only.
 495          The driver creates a device /dev/chsc, which may be used to
 496          obtain I/O configuration information about the machine and
 497          to issue asynchronous chsc commands (DANGEROUS).
 498          You will usually only want to use this interface on a special
 499          LPAR designated for system management.
 500
 501          To compile this driver as a module, choose M here: the
 502          module will be called chsc_sch.
 503
 504          If unsure, say N.
 505
 506config SCM_BUS
 507        def_bool y
 508        depends on 64BIT
 509        prompt "SCM bus driver"
 510        help
 511          Bus driver for Storage Class Memory.
 512
 513config EADM_SCH
 514        def_tristate m
 515        prompt "Support for EADM subchannels"
 516        depends on SCM_BUS
 517        help
 518          This driver allows usage of EADM subchannels. EADM subchannels act
 519          as a communication vehicle for SCM increments.
 520
 521          To compile this driver as a module, choose M here: the
 522          module will be called eadm_sch.
 523
 524endmenu
 525
 526menu "Dump support"
 527
 528config CRASH_DUMP
 529        bool "kernel crash dumps"
 530        depends on 64BIT && SMP
 531        select KEXEC
 532        help
 533          Generate crash dump after being started by kexec.
 534          Crash dump kernels are loaded in the main kernel with kexec-tools
 535          into a specially reserved region and then later executed after
 536          a crash by kdump/kexec.
 537          For more details see Documentation/kdump/kdump.txt
 538
 539config ZFCPDUMP
 540        def_bool n
 541        prompt "zfcpdump support"
 542        select SMP
 543        help
 544          Select this option if you want to build an zfcpdump enabled kernel.
 545          Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
 546
 547endmenu
 548
 549menu "Executable file formats / Emulations"
 550
 551source "fs/Kconfig.binfmt"
 552
 553config SECCOMP
 554        def_bool y
 555        prompt "Enable seccomp to safely compute untrusted bytecode"
 556        depends on PROC_FS
 557        help
 558          This kernel feature is useful for number crunching applications
 559          that may need to compute untrusted bytecode during their
 560          execution. By using pipes or other transports made available to
 561          the process as file descriptors supporting the read/write
 562          syscalls, it's possible to isolate those applications in
 563          their own address space using seccomp. Once seccomp is
 564          enabled via /proc/<pid>/seccomp, it cannot be disabled
 565          and the task is only allowed to execute a few safe syscalls
 566          defined by each seccomp mode.
 567
 568          If unsure, say Y.
 569
 570endmenu
 571
 572menu "Power Management"
 573
 574config ARCH_HIBERNATION_POSSIBLE
 575        def_bool y if 64BIT
 576
 577source "kernel/power/Kconfig"
 578
 579endmenu
 580
 581source "net/Kconfig"
 582
 583config PCMCIA
 584        def_bool n
 585
 586config CCW
 587        def_bool y
 588
 589source "drivers/Kconfig"
 590
 591source "fs/Kconfig"
 592
 593source "arch/s390/Kconfig.debug"
 594
 595source "security/Kconfig"
 596
 597source "crypto/Kconfig"
 598
 599source "lib/Kconfig"
 600
 601menu "Virtualization"
 602
 603config PFAULT
 604        def_bool y
 605        prompt "Pseudo page fault support"
 606        help
 607          Select this option, if you want to use PFAULT pseudo page fault
 608          handling under VM. If running native or in LPAR, this option
 609          has no effect. If your VM does not support PFAULT, PAGEEX
 610          pseudo page fault handling will be used.
 611          Note that VM 4.2 supports PFAULT but has a bug in its
 612          implementation that causes some problems.
 613          Everybody who wants to run Linux under VM != VM4.2 should select
 614          this option.
 615
 616config SHARED_KERNEL
 617        bool "VM shared kernel support"
 618        depends on !JUMP_LABEL
 619        help
 620          Select this option, if you want to share the text segment of the
 621          Linux kernel between different VM guests. This reduces memory
 622          usage with lots of guests but greatly increases kernel size.
 623          Also if a kernel was IPL'ed from a shared segment the kexec system
 624          call will not work.
 625          You should only select this option if you know what you are
 626          doing and want to exploit this feature.
 627
 628config CMM
 629        def_tristate n
 630        prompt "Cooperative memory management"
 631        help
 632          Select this option, if you want to enable the kernel interface
 633          to reduce the memory size of the system. This is accomplished
 634          by allocating pages of memory and put them "on hold". This only
 635          makes sense for a system running under VM where the unused pages
 636          will be reused by VM for other guest systems. The interface
 637          allows an external monitor to balance memory of many systems.
 638          Everybody who wants to run Linux under VM should select this
 639          option.
 640
 641config CMM_IUCV
 642        def_bool y
 643        prompt "IUCV special message interface to cooperative memory management"
 644        depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
 645        help
 646          Select this option to enable the special message interface to
 647          the cooperative memory management.
 648
 649config APPLDATA_BASE
 650        def_bool n
 651        prompt "Linux - VM Monitor Stream, base infrastructure"
 652        depends on PROC_FS
 653        help
 654          This provides a kernel interface for creating and updating z/VM APPLDATA
 655          monitor records. The monitor records are updated at certain time
 656          intervals, once the timer is started.
 657          Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
 658          i.e. enables or disables monitoring on the Linux side.
 659          A custom interval value (in seconds) can be written to
 660          /proc/appldata/interval.
 661
 662          Defaults are 60 seconds interval and timer off.
 663          The /proc entries can also be read from, showing the current settings.
 664
 665config APPLDATA_MEM
 666        def_tristate m
 667        prompt "Monitor memory management statistics"
 668        depends on APPLDATA_BASE && VM_EVENT_COUNTERS
 669        help
 670          This provides memory management related data to the Linux - VM Monitor
 671          Stream, like paging/swapping rate, memory utilisation, etc.
 672          Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
 673          APPLDATA monitor record, i.e. enables or disables monitoring this record
 674          on the z/VM side.
 675
 676          Default is disabled.
 677          The /proc entry can also be read from, showing the current settings.
 678
 679          This can also be compiled as a module, which will be called
 680          appldata_mem.o.
 681
 682config APPLDATA_OS
 683        def_tristate m
 684        prompt "Monitor OS statistics"
 685        depends on APPLDATA_BASE
 686        help
 687          This provides OS related data to the Linux - VM Monitor Stream, like
 688          CPU utilisation, etc.
 689          Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
 690          APPLDATA monitor record, i.e. enables or disables monitoring this record
 691          on the z/VM side.
 692
 693          Default is disabled.
 694          This can also be compiled as a module, which will be called
 695          appldata_os.o.
 696
 697config APPLDATA_NET_SUM
 698        def_tristate m
 699        prompt "Monitor overall network statistics"
 700        depends on APPLDATA_BASE && NET
 701        help
 702          This provides network related data to the Linux - VM Monitor Stream,
 703          currently there is only a total sum of network I/O statistics, no
 704          per-interface data.
 705          Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
 706          APPLDATA monitor record, i.e. enables or disables monitoring this record
 707          on the z/VM side.
 708
 709          Default is disabled.
 710          This can also be compiled as a module, which will be called
 711          appldata_net_sum.o.
 712
 713config S390_HYPFS_FS
 714        def_bool y
 715        prompt "s390 hypervisor file system support"
 716        select SYS_HYPERVISOR
 717        help
 718          This is a virtual file system intended to provide accounting
 719          information in an s390 hypervisor environment.
 720
 721source "arch/s390/kvm/Kconfig"
 722
 723config S390_GUEST
 724        def_bool y
 725        prompt "s390 support for virtio devices"
 726        depends on 64BIT
 727        select VIRTUALIZATION
 728        select VIRTIO
 729        select VIRTIO_CONSOLE
 730        help
 731          Enabling this option adds support for virtio based paravirtual device
 732          drivers on s390.
 733
 734          Select this option if you want to run the kernel as a guest under
 735          the KVM hypervisor.
 736
 737endmenu
 738
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