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 y
  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_MAP
  56         def_bool y
  57
  58 config PCI_QUIRKS
  59         def_bool n
  60
  61 config ARCH_SUPPORTS_UPROBES
  62         def_bool y
  63
  64 config S390
  65         def_bool y
  66         select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  67         select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
  68         select ARCH_HAS_ELF_RANDOMIZE
  69         select ARCH_HAS_GCOV_PROFILE_ALL
  70         select ARCH_HAS_SG_CHAIN
  71         select ARCH_HAVE_NMI_SAFE_CMPXCHG
  72         select ARCH_INLINE_READ_LOCK
  73         select ARCH_INLINE_READ_LOCK_BH
  74         select ARCH_INLINE_READ_LOCK_IRQ
  75         select ARCH_INLINE_READ_LOCK_IRQSAVE
  76         select ARCH_INLINE_READ_TRYLOCK
  77         select ARCH_INLINE_READ_UNLOCK
  78         select ARCH_INLINE_READ_UNLOCK_BH
  79         select ARCH_INLINE_READ_UNLOCK_IRQ
  80         select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
  81         select ARCH_INLINE_SPIN_LOCK
  82         select ARCH_INLINE_SPIN_LOCK_BH
  83         select ARCH_INLINE_SPIN_LOCK_IRQ
  84         select ARCH_INLINE_SPIN_LOCK_IRQSAVE
  85         select ARCH_INLINE_SPIN_TRYLOCK
  86         select ARCH_INLINE_SPIN_TRYLOCK_BH
  87         select ARCH_INLINE_SPIN_UNLOCK
  88         select ARCH_INLINE_SPIN_UNLOCK_BH
  89         select ARCH_INLINE_SPIN_UNLOCK_IRQ
  90         select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
  91         select ARCH_INLINE_WRITE_LOCK
  92         select ARCH_INLINE_WRITE_LOCK_BH
  93         select ARCH_INLINE_WRITE_LOCK_IRQ
  94         select ARCH_INLINE_WRITE_LOCK_IRQSAVE
  95         select ARCH_INLINE_WRITE_TRYLOCK
  96         select ARCH_INLINE_WRITE_UNLOCK
  97         select ARCH_INLINE_WRITE_UNLOCK_BH
  98         select ARCH_INLINE_WRITE_UNLOCK_IRQ
  99         select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
 100         select ARCH_SAVE_PAGE_KEYS if HIBERNATION
 101         select ARCH_SUPPORTS_ATOMIC_RMW
 102         select ARCH_USE_CMPXCHG_LOCKREF
 103         select ARCH_WANT_IPC_PARSE_VERSION
 104         select BUILDTIME_EXTABLE_SORT
 105         select CLONE_BACKWARDS2
 106         select DYNAMIC_FTRACE if FUNCTION_TRACER
 107         select GENERIC_CLOCKEVENTS
 108         select GENERIC_CPU_AUTOPROBE
 109         select GENERIC_CPU_DEVICES if !SMP
 110         select GENERIC_FIND_FIRST_BIT
 111         select GENERIC_SMP_IDLE_THREAD
 112         select GENERIC_TIME_VSYSCALL
 113         select HAVE_ALIGNED_STRUCT_PAGE if SLUB
 114         select HAVE_ARCH_AUDITSYSCALL
 115         select HAVE_ARCH_JUMP_LABEL
 116         select HAVE_ARCH_SECCOMP_FILTER
 117         select HAVE_ARCH_TRACEHOOK
 118         select HAVE_ARCH_TRANSPARENT_HUGEPAGE
 119         select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
 120         select HAVE_CMPXCHG_DOUBLE
 121         select HAVE_CMPXCHG_LOCAL
 122         select HAVE_DEBUG_KMEMLEAK
 123         select HAVE_DYNAMIC_FTRACE
 124         select HAVE_DYNAMIC_FTRACE_WITH_REGS
 125         select HAVE_FTRACE_MCOUNT_RECORD
 126         select HAVE_FUNCTION_GRAPH_TRACER
 127         select HAVE_FUNCTION_TRACER
 128         select HAVE_FUTEX_CMPXCHG if FUTEX
 129         select HAVE_KERNEL_BZIP2
 130         select HAVE_KERNEL_GZIP
 131         select HAVE_KERNEL_LZ4
 132         select HAVE_KERNEL_LZMA
 133         select HAVE_KERNEL_LZO
 134         select HAVE_KERNEL_XZ
 135         select HAVE_KPROBES
 136         select HAVE_KRETPROBES
 137         select HAVE_KVM
 138         select HAVE_LIVEPATCH
 139         select HAVE_MEMBLOCK
 140         select HAVE_MEMBLOCK_NODE_MAP
 141         select HAVE_MEMBLOCK_PHYS_MAP
 142         select HAVE_MOD_ARCH_SPECIFIC
 143         select HAVE_OPROFILE
 144         select HAVE_PERF_EVENTS
 145         select HAVE_REGS_AND_STACK_ACCESS_API
 146         select HAVE_SYSCALL_TRACEPOINTS
 147         select HAVE_VIRT_CPU_ACCOUNTING
 148         select MODULES_USE_ELF_RELA
 149         select NO_BOOTMEM
 150         select OLD_SIGACTION
 151         select OLD_SIGSUSPEND3
 152         select SYSCTL_EXCEPTION_TRACE
 153         select TTY
 154         select VIRT_CPU_ACCOUNTING
 155         select VIRT_TO_BUS
 156         select ARCH_SUPPORTS_NUMA_BALANCING
 157         select ARCH_WANTS_PROT_NUMA_PROT_NONE
 158         select HAVE_ARCH_EARLY_PFN_TO_NID
 159
 160
 161 config SCHED_OMIT_FRAME_POINTER
 162         def_bool y
 163
 164 config PGTABLE_LEVELS
 165         int
 166         default 4 if 64BIT
 167         default 2
 168
 169 source "init/Kconfig"
 170
 171 source "kernel/Kconfig.freezer"
 172
 173 source "kernel/livepatch/Kconfig"
 174
 175 menu "Processor type and features"
 176
 177 config HAVE_MARCH_Z900_FEATURES
 178         def_bool n
 179
 180 config HAVE_MARCH_Z990_FEATURES
 181         def_bool n
 182         select HAVE_MARCH_Z900_FEATURES
 183
 184 config HAVE_MARCH_Z9_109_FEATURES
 185         def_bool n
 186         select HAVE_MARCH_Z990_FEATURES
 187
 188 config HAVE_MARCH_Z10_FEATURES
 189         def_bool n
 190         select HAVE_MARCH_Z9_109_FEATURES
 191
 192 config HAVE_MARCH_Z196_FEATURES
 193         def_bool n
 194         select HAVE_MARCH_Z10_FEATURES
 195
 196 config HAVE_MARCH_ZEC12_FEATURES
 197         def_bool n
 198         select HAVE_MARCH_Z196_FEATURES
 199
 200 config HAVE_MARCH_Z13_FEATURES
 201         def_bool n
 202         select HAVE_MARCH_ZEC12_FEATURES
 203
 204 choice
 205         prompt "Processor type"
 206         default MARCH_Z900
 207
 208 config MARCH_Z900
 209         bool "IBM zSeries model z800 and z900"
 210         select HAVE_MARCH_Z900_FEATURES
 211         help
 212           Select this to enable optimizations for model z800/z900 (2064 and
 213           2066 series). This will enable some optimizations that are not
 214           available on older ESA/390 (31 Bit) only CPUs.
 215
 216 config MARCH_Z990
 217         bool "IBM zSeries model z890 and z990"
 218         select HAVE_MARCH_Z990_FEATURES
 219         help
 220           Select this to enable optimizations for model z890/z990 (2084 and
 221           2086 series). The kernel will be slightly faster but will not work
 222           on older machines.
 223
 224 config MARCH_Z9_109
 225         bool "IBM System z9"
 226         select HAVE_MARCH_Z9_109_FEATURES
 227         help
 228           Select this to enable optimizations for IBM System z9 (2094 and
 229           2096 series). The kernel will be slightly faster but will not work
 230           on older machines.
 231
 232 config MARCH_Z10
 233         bool "IBM System z10"
 234         select HAVE_MARCH_Z10_FEATURES
 235         help
 236           Select this to enable optimizations for IBM System z10 (2097 and
 237           2098 series). The kernel will be slightly faster but will not work
 238           on older machines.
 239
 240 config MARCH_Z196
 241         bool "IBM zEnterprise 114 and 196"
 242         select HAVE_MARCH_Z196_FEATURES
 243         help
 244           Select this to enable optimizations for IBM zEnterprise 114 and 196
 245           (2818 and 2817 series). The kernel will be slightly faster but will
 246           not work on older machines.
 247
 248 config MARCH_ZEC12
 249         bool "IBM zBC12 and zEC12"
 250         select HAVE_MARCH_ZEC12_FEATURES
 251         help
 252           Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
 253           2827 series). The kernel will be slightly faster but will not work on
 254           older machines.
 255
 256 config MARCH_Z13
 257         bool "IBM z13"
 258         select HAVE_MARCH_Z13_FEATURES
 259         help
 260           Select this to enable optimizations for IBM z13 (2964 series).
 261           The kernel will be slightly faster but will not work on older
 262           machines.
 263
 264 endchoice
 265
 266 config MARCH_Z900_TUNE
 267         def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
 268
 269 config MARCH_Z990_TUNE
 270         def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
 271
 272 config MARCH_Z9_109_TUNE
 273         def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
 274
 275 config MARCH_Z10_TUNE
 276         def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
 277
 278 config MARCH_Z196_TUNE
 279         def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
 280
 281 config MARCH_ZEC12_TUNE
 282         def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
 283
 284 config MARCH_Z13_TUNE
 285         def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
 286
 287 choice
 288         prompt "Tune code generation"
 289         default TUNE_DEFAULT
 290         help
 291           Cause the compiler to tune (-mtune) the generated code for a machine.
 292           This will make the code run faster on the selected machine but
 293           somewhat slower on other machines.
 294           This option only changes how the compiler emits instructions, not the
 295           selection of instructions itself, so the resulting kernel will run on
 296           all other machines.
 297
 298 config TUNE_DEFAULT
 299         bool "Default"
 300         help
 301           Tune the generated code for the target processor for which the kernel
 302           will be compiled.
 303
 304 config TUNE_Z900
 305         bool "IBM zSeries model z800 and z900"
 306
 307 config TUNE_Z990
 308         bool "IBM zSeries model z890 and z990"
 309
 310 config TUNE_Z9_109
 311         bool "IBM System z9"
 312
 313 config TUNE_Z10
 314         bool "IBM System z10"
 315
 316 config TUNE_Z196
 317         bool "IBM zEnterprise 114 and 196"
 318
 319 config TUNE_ZEC12
 320         bool "IBM zBC12 and zEC12"
 321
 322 config TUNE_Z13
 323         bool "IBM z13"
 324
 325 endchoice
 326
 327 config 64BIT
 328         def_bool y
 329
 330 config COMPAT
 331         def_bool y
 332         prompt "Kernel support for 31 bit emulation"
 333         select COMPAT_BINFMT_ELF if BINFMT_ELF
 334         select ARCH_WANT_OLD_COMPAT_IPC
 335         select COMPAT_OLD_SIGACTION
 336         depends on MULTIUSER
 337         help
 338           Select this option if you want to enable your system kernel to
 339           handle system-calls from ELF binaries for 31 bit ESA.  This option
 340           (and some other stuff like libraries and such) is needed for
 341           executing 31 bit applications.  It is safe to say "Y".
 342
 343 config SYSVIPC_COMPAT
 344         def_bool y if COMPAT && SYSVIPC
 345
 346 config KEYS_COMPAT
 347         def_bool y if COMPAT && KEYS
 348
 349 config SMP
 350         def_bool y
 351         prompt "Symmetric multi-processing support"
 352         ---help---
 353           This enables support for systems with more than one CPU. If you have
 354           a system with only one CPU, like most personal computers, say N. If
 355           you have a system with more than one CPU, say Y.
 356
 357           If you say N here, the kernel will run on uni- and multiprocessor
 358           machines, but will use only one CPU of a multiprocessor machine. If
 359           you say Y here, the kernel will run on many, but not all,
 360           uniprocessor machines. On a uniprocessor machine, the kernel
 361           will run faster if you say N here.
 362
 363           See also the SMP-HOWTO available at
 364           <http://www.tldp.org/docs.html#howto>.
 365
 366           Even if you don't know what to do here, say Y.
 367
 368 config NR_CPUS
 369         int "Maximum number of CPUs (2-512)"
 370         range 2 512
 371         depends on SMP
 372         default "64"
 373         help
 374           This allows you to specify the maximum number of CPUs which this
 375           kernel will support. The maximum supported value is 512 and the
 376           minimum value which makes sense is 2.
 377
 378           This is purely to save memory - each supported CPU adds
 379           approximately sixteen kilobytes to the kernel image.
 380
 381 config HOTPLUG_CPU
 382         def_bool y
 383         prompt "Support for hot-pluggable CPUs"
 384         depends on SMP
 385         help
 386           Say Y here to be able to turn CPUs off and on. CPUs
 387           can be controlled through /sys/devices/system/cpu/cpu#.
 388           Say N if you want to disable CPU hotplug.
 389
 390 config SCHED_SMT
 391         def_bool n
 392
 393 # Some NUMA nodes have memory ranges that span
 394 # other nodes.  Even though a pfn is valid and
 395 # between a node's start and end pfns, it may not
 396 # reside on that node.  See memmap_init_zone()
 397 # for details. <- They meant memory holes!
 398 config NODES_SPAN_OTHER_NODES
 399         def_bool NUMA
 400
 401 config NUMA
 402         bool "NUMA support"
 403         depends on SMP && 64BIT && SCHED_TOPOLOGY
 404         default n
 405         help
 406           Enable NUMA support
 407
 408           This option adds NUMA support to the kernel.
 409
 410           An operation mode can be selected by appending
 411           numa=<method> to the kernel command line.
 412
 413           The default behaviour is identical to appending numa=plain to
 414           the command line. This will create just one node with all
 415           available memory and all CPUs in it.
 416
 417 config NODES_SHIFT
 418         int "Maximum NUMA nodes (as a power of 2)"
 419         range 1 10
 420         depends on NUMA
 421         default "4"
 422         help
 423           Specify the maximum number of NUMA nodes available on the target
 424           system. Increases memory reserved to accommodate various tables.
 425
 426 config SCHED_MC
 427         def_bool n
 428
 429 config SCHED_BOOK
 430         def_bool n
 431
 432 config SCHED_TOPOLOGY
 433         def_bool y
 434         prompt "Topology scheduler support"
 435         depends on SMP
 436         select SCHED_SMT
 437         select SCHED_MC
 438         select SCHED_BOOK
 439         help
 440           Topology scheduler support improves the CPU scheduler's decision
 441           making when dealing with machines that have multi-threading,
 442           multiple cores or multiple books.
 443
 444 source kernel/Kconfig.preempt
 445
 446 source kernel/Kconfig.hz
 447
 448 endmenu
 449
 450 menu "Memory setup"
 451
 452 config ARCH_SPARSEMEM_ENABLE
 453         def_bool y
 454         select SPARSEMEM_VMEMMAP_ENABLE
 455         select SPARSEMEM_VMEMMAP
 456
 457 config ARCH_SPARSEMEM_DEFAULT
 458         def_bool y
 459
 460 config ARCH_SELECT_MEMORY_MODEL
 461         def_bool y
 462
 463 config ARCH_ENABLE_MEMORY_HOTPLUG
 464         def_bool y if SPARSEMEM
 465
 466 config ARCH_ENABLE_MEMORY_HOTREMOVE
 467         def_bool y
 468
 469 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
 470         def_bool y
 471
 472 config FORCE_MAX_ZONEORDER
 473         int
 474         default "9"
 475
 476 source "mm/Kconfig"
 477
 478 config PACK_STACK
 479         def_bool y
 480         prompt "Pack kernel stack"
 481         help
 482           This option enables the compiler option -mkernel-backchain if it
 483           is available. If the option is available the compiler supports
 484           the new stack layout which dramatically reduces the minimum stack
 485           frame size. With an old compiler a non-leaf function needs a
 486           minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
 487           -mkernel-backchain the minimum size drops to 16 byte on 31 bit
 488           and 24 byte on 64 bit.
 489
 490           Say Y if you are unsure.
 491
 492 config CHECK_STACK
 493         def_bool y
 494         prompt "Detect kernel stack overflow"
 495         help
 496           This option enables the compiler option -mstack-guard and
 497           -mstack-size if they are available. If the compiler supports them
 498           it will emit additional code to each function prolog to trigger
 499           an illegal operation if the kernel stack is about to overflow.
 500
 501           Say N if you are unsure.
 502
 503 config STACK_GUARD
 504         int "Size of the guard area (128-1024)"
 505         range 128 1024
 506         depends on CHECK_STACK
 507         default "256"
 508         help
 509           This allows you to specify the size of the guard area at the lower
 510           end of the kernel stack. If the kernel stack points into the guard
 511           area on function entry an illegal operation is triggered. The size
 512           needs to be a power of 2. Please keep in mind that the size of an
 513           interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
 514           The minimum size for the stack guard should be 256 for 31 bit and
 515           512 for 64 bit.
 516
 517 config WARN_DYNAMIC_STACK
 518         def_bool n
 519         prompt "Emit compiler warnings for function with dynamic stack usage"
 520         help
 521           This option enables the compiler option -mwarn-dynamicstack. If the
 522           compiler supports this options generates warnings for functions
 523           that dynamically allocate stack space using alloca.
 524
 525           Say N if you are unsure.
 526
 527 endmenu
 528
 529 menu "I/O subsystem"
 530
 531 config QDIO
 532         def_tristate y
 533         prompt "QDIO support"
 534         ---help---
 535           This driver provides the Queued Direct I/O base support for
 536           IBM System z.
 537
 538           To compile this driver as a module, choose M here: the
 539           module will be called qdio.
 540
 541           If unsure, say Y.
 542
 543 menuconfig PCI
 544         bool "PCI support"
 545         select HAVE_DMA_ATTRS
 546         select PCI_MSI
 547         help
 548           Enable PCI support.
 549
 550 if PCI
 551
 552 config PCI_NR_FUNCTIONS
 553         int "Maximum number of PCI functions (1-4096)"
 554         range 1 4096
 555         default "64"
 556         help
 557           This allows you to specify the maximum number of PCI functions which
 558           this kernel will support.
 559
 560 config PCI_NR_MSI
 561         int "Maximum number of MSI interrupts (64-32768)"
 562         range 64 32768
 563         default "256"
 564         help
 565           This defines the number of virtual interrupts the kernel will
 566           provide for MSI interrupts. If you configure your system to have
 567           too few drivers will fail to allocate MSI interrupts for all
 568           PCI devices.
 569
 570 source "drivers/pci/Kconfig"
 571 source "drivers/pci/pcie/Kconfig"
 572 source "drivers/pci/hotplug/Kconfig"
 573
 574 endif   # PCI
 575
 576 config PCI_DOMAINS
 577         def_bool PCI
 578
 579 config HAS_IOMEM
 580         def_bool PCI
 581
 582 config IOMMU_HELPER
 583         def_bool PCI
 584
 585 config HAS_DMA
 586         def_bool PCI
 587         select HAVE_DMA_API_DEBUG
 588
 589 config NEED_SG_DMA_LENGTH
 590         def_bool PCI
 591
 592 config NEED_DMA_MAP_STATE
 593         def_bool PCI
 594
 595 config CHSC_SCH
 596         def_tristate m
 597         prompt "Support for CHSC subchannels"
 598         help
 599           This driver allows usage of CHSC subchannels. A CHSC subchannel
 600           is usually present on LPAR only.
 601           The driver creates a device /dev/chsc, which may be used to
 602           obtain I/O configuration information about the machine and
 603           to issue asynchronous chsc commands (DANGEROUS).
 604           You will usually only want to use this interface on a special
 605           LPAR designated for system management.
 606
 607           To compile this driver as a module, choose M here: the
 608           module will be called chsc_sch.
 609
 610           If unsure, say N.
 611
 612 config SCM_BUS
 613         def_bool y
 614         prompt "SCM bus driver"
 615         help
 616           Bus driver for Storage Class Memory.
 617
 618 config EADM_SCH
 619         def_tristate m
 620         prompt "Support for EADM subchannels"
 621         depends on SCM_BUS
 622         help
 623           This driver allows usage of EADM subchannels. EADM subchannels act
 624           as a communication vehicle for SCM increments.
 625
 626           To compile this driver as a module, choose M here: the
 627           module will be called eadm_sch.
 628
 629 endmenu
 630
 631 menu "Dump support"
 632
 633 config CRASH_DUMP
 634         bool "kernel crash dumps"
 635         depends on SMP
 636         select KEXEC
 637         help
 638           Generate crash dump after being started by kexec.
 639           Crash dump kernels are loaded in the main kernel with kexec-tools
 640           into a specially reserved region and then later executed after
 641           a crash by kdump/kexec.
 642           Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
 643           This option also enables s390 zfcpdump.
 644           See also <file:Documentation/s390/zfcpdump.txt>
 645
 646 endmenu
 647
 648 menu "Executable file formats / Emulations"
 649
 650 source "fs/Kconfig.binfmt"
 651
 652 config SECCOMP
 653         def_bool y
 654         prompt "Enable seccomp to safely compute untrusted bytecode"
 655         depends on PROC_FS
 656         help
 657           This kernel feature is useful for number crunching applications
 658           that may need to compute untrusted bytecode during their
 659           execution. By using pipes or other transports made available to
 660           the process as file descriptors supporting the read/write
 661           syscalls, it's possible to isolate those applications in
 662           their own address space using seccomp. Once seccomp is
 663           enabled via /proc/<pid>/seccomp, it cannot be disabled
 664           and the task is only allowed to execute a few safe syscalls
 665           defined by each seccomp mode.
 666
 667           If unsure, say Y.
 668
 669 endmenu
 670
 671 menu "Power Management"
 672
 673 config ARCH_HIBERNATION_POSSIBLE
 674         def_bool y
 675
 676 source "kernel/power/Kconfig"
 677
 678 endmenu
 679
 680 source "net/Kconfig"
 681
 682 config PCMCIA
 683         def_bool n
 684
 685 config CCW
 686         def_bool y
 687
 688 source "drivers/Kconfig"
 689
 690 source "fs/Kconfig"
 691
 692 source "arch/s390/Kconfig.debug"
 693
 694 source "security/Kconfig"
 695
 696 source "crypto/Kconfig"
 697
 698 source "lib/Kconfig"
 699
 700 menu "Virtualization"
 701
 702 config PFAULT
 703         def_bool y
 704         prompt "Pseudo page fault support"
 705         help
 706           Select this option, if you want to use PFAULT pseudo page fault
 707           handling under VM. If running native or in LPAR, this option
 708           has no effect. If your VM does not support PFAULT, PAGEEX
 709           pseudo page fault handling will be used.
 710           Note that VM 4.2 supports PFAULT but has a bug in its
 711           implementation that causes some problems.
 712           Everybody who wants to run Linux under VM != VM4.2 should select
 713           this option.
 714
 715 config SHARED_KERNEL
 716         bool "VM shared kernel support"
 717         depends on !JUMP_LABEL
 718         help
 719           Select this option, if you want to share the text segment of the
 720           Linux kernel between different VM guests. This reduces memory
 721           usage with lots of guests but greatly increases kernel size.
 722           Also if a kernel was IPL'ed from a shared segment the kexec system
 723           call will not work.
 724           You should only select this option if you know what you are
 725           doing and want to exploit this feature.
 726
 727 config CMM
 728         def_tristate n
 729         prompt "Cooperative memory management"
 730         help
 731           Select this option, if you want to enable the kernel interface
 732           to reduce the memory size of the system. This is accomplished
 733           by allocating pages of memory and put them "on hold". This only
 734           makes sense for a system running under VM where the unused pages
 735           will be reused by VM for other guest systems. The interface
 736           allows an external monitor to balance memory of many systems.
 737           Everybody who wants to run Linux under VM should select this
 738           option.
 739
 740 config CMM_IUCV
 741         def_bool y
 742         prompt "IUCV special message interface to cooperative memory management"
 743         depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
 744         help
 745           Select this option to enable the special message interface to
 746           the cooperative memory management.
 747
 748 config APPLDATA_BASE
 749         def_bool n
 750         prompt "Linux - VM Monitor Stream, base infrastructure"
 751         depends on PROC_FS
 752         help
 753           This provides a kernel interface for creating and updating z/VM APPLDATA
 754           monitor records. The monitor records are updated at certain time
 755           intervals, once the timer is started.
 756           Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
 757           i.e. enables or disables monitoring on the Linux side.
 758           A custom interval value (in seconds) can be written to
 759           /proc/appldata/interval.
 760
 761           Defaults are 60 seconds interval and timer off.
 762           The /proc entries can also be read from, showing the current settings.
 763
 764 config APPLDATA_MEM
 765         def_tristate m
 766         prompt "Monitor memory management statistics"
 767         depends on APPLDATA_BASE && VM_EVENT_COUNTERS
 768         help
 769           This provides memory management related data to the Linux - VM Monitor
 770           Stream, like paging/swapping rate, memory utilisation, etc.
 771           Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
 772           APPLDATA monitor record, i.e. enables or disables monitoring this record
 773           on the z/VM side.
 774
 775           Default is disabled.
 776           The /proc entry can also be read from, showing the current settings.
 777
 778           This can also be compiled as a module, which will be called
 779           appldata_mem.o.
 780
 781 config APPLDATA_OS
 782         def_tristate m
 783         prompt "Monitor OS statistics"
 784         depends on APPLDATA_BASE
 785         help
 786           This provides OS related data to the Linux - VM Monitor Stream, like
 787           CPU utilisation, etc.
 788           Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
 789           APPLDATA monitor record, i.e. enables or disables monitoring this record
 790           on the z/VM side.
 791
 792           Default is disabled.
 793           This can also be compiled as a module, which will be called
 794           appldata_os.o.
 795
 796 config APPLDATA_NET_SUM
 797         def_tristate m
 798         prompt "Monitor overall network statistics"
 799         depends on APPLDATA_BASE && NET
 800         help
 801           This provides network related data to the Linux - VM Monitor Stream,
 802           currently there is only a total sum of network I/O statistics, no
 803           per-interface data.
 804           Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
 805           APPLDATA monitor record, i.e. enables or disables monitoring this record
 806           on the z/VM side.
 807
 808           Default is disabled.
 809           This can also be compiled as a module, which will be called
 810           appldata_net_sum.o.
 811
 812 config S390_HYPFS_FS
 813         def_bool y
 814         prompt "s390 hypervisor file system support"
 815         select SYS_HYPERVISOR
 816         help
 817           This is a virtual file system intended to provide accounting
 818           information in an s390 hypervisor environment.
 819
 820 source "arch/s390/kvm/Kconfig"
 821
 822 config S390_GUEST
 823         def_bool y
 824         prompt "s390 support for virtio devices"
 825         select TTY
 826         select VIRTUALIZATION
 827         select VIRTIO
 828         select VIRTIO_CONSOLE
 829         help
 830           Enabling this option adds support for virtio based paravirtual device
 831           drivers on s390.
 832
 833           Select this option if you want to run the kernel as a guest under
 834           the KVM hypervisor.
 835
 836 endmenu