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