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_MAP
  56         def_bool y
  57
  58 config PCI_QUIRKS
  59         def_bool n
  60
  61 config ARCH_SUPPORTS_UPROBES
  62         def_bool 64BIT
  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_DEVICES if !SMP
 109         select GENERIC_FIND_FIRST_BIT
 110         select GENERIC_SMP_IDLE_THREAD
 111         select GENERIC_TIME_VSYSCALL
 112         select HAVE_ALIGNED_STRUCT_PAGE if SLUB
 113         select HAVE_ARCH_AUDITSYSCALL
 114         select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
 115         select HAVE_ARCH_SECCOMP_FILTER
 116         select HAVE_ARCH_TRACEHOOK
 117         select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
 118         select HAVE_BPF_JIT if 64BIT && PACK_STACK
 119         select HAVE_CMPXCHG_DOUBLE
 120         select HAVE_CMPXCHG_LOCAL
 121         select HAVE_DEBUG_KMEMLEAK
 122         select HAVE_DYNAMIC_FTRACE if 64BIT
 123         select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT
 124         select HAVE_FTRACE_MCOUNT_RECORD
 125         select HAVE_FUNCTION_GRAPH_TRACER if 64BIT
 126         select HAVE_FUNCTION_TRACER if 64BIT
 127         select HAVE_FUTEX_CMPXCHG if FUTEX
 128         select HAVE_KERNEL_BZIP2
 129         select HAVE_KERNEL_GZIP
 130         select HAVE_KERNEL_LZ4
 131         select HAVE_KERNEL_LZMA
 132         select HAVE_KERNEL_LZO
 133         select HAVE_KERNEL_XZ
 134         select HAVE_KPROBES
 135         select HAVE_KRETPROBES
 136         select HAVE_KVM if 64BIT
 137         select HAVE_MEMBLOCK
 138         select HAVE_MEMBLOCK_NODE_MAP
 139         select HAVE_MEMBLOCK_PHYS_MAP
 140         select HAVE_MOD_ARCH_SPECIFIC
 141         select HAVE_OPROFILE
 142         select HAVE_PERF_EVENTS
 143         select HAVE_REGS_AND_STACK_ACCESS_API
 144         select HAVE_SYSCALL_TRACEPOINTS
 145         select HAVE_UID16 if 32BIT
 146         select HAVE_VIRT_CPU_ACCOUNTING
 147         select MODULES_USE_ELF_RELA
 148         select NO_BOOTMEM
 149         select OLD_SIGACTION
 150         select OLD_SIGSUSPEND3
 151         select SYSCTL_EXCEPTION_TRACE
 152         select TTY
 153         select VIRT_CPU_ACCOUNTING
 154         select VIRT_TO_BUS
 155
 156 config SCHED_OMIT_FRAME_POINTER
 157         def_bool y
 158
 159 config PGTABLE_LEVELS
 160         int
 161         default 4 if 64BIT
 162         default 2
 163
 164 source "init/Kconfig"
 165
 166 source "kernel/Kconfig.freezer"
 167
 168 menu "Processor type and features"
 169
 170 config HAVE_MARCH_Z900_FEATURES
 171         def_bool n
 172
 173 config HAVE_MARCH_Z990_FEATURES
 174         def_bool n
 175         select HAVE_MARCH_Z900_FEATURES
 176
 177 config HAVE_MARCH_Z9_109_FEATURES
 178         def_bool n
 179         select HAVE_MARCH_Z990_FEATURES
 180
 181 config HAVE_MARCH_Z10_FEATURES
 182         def_bool n
 183         select HAVE_MARCH_Z9_109_FEATURES
 184
 185 config HAVE_MARCH_Z196_FEATURES
 186         def_bool n
 187         select HAVE_MARCH_Z10_FEATURES
 188
 189 config HAVE_MARCH_ZEC12_FEATURES
 190         def_bool n
 191         select HAVE_MARCH_Z196_FEATURES
 192
 193 config HAVE_MARCH_Z13_FEATURES
 194         def_bool n
 195         select HAVE_MARCH_ZEC12_FEATURES
 196
 197 choice
 198         prompt "Processor type"
 199         default MARCH_G5
 200
 201 config MARCH_G5
 202         bool "System/390 model G5 and G6"
 203         depends on !64BIT
 204         help
 205           Select this to build a 31 bit kernel that works
 206           on all ESA/390 and z/Architecture machines.
 207
 208 config MARCH_Z900
 209         bool "IBM zSeries model z800 and z900"
 210         select HAVE_MARCH_Z900_FEATURES if 64BIT
 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 if 64BIT
 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 if 64BIT
 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 if 64BIT
 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 if 64BIT
 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 if 64BIT
 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 if 64BIT
 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_G5_TUNE
 267         def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT
 268
 269 config MARCH_Z900_TUNE
 270         def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
 271
 272 config MARCH_Z990_TUNE
 273         def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
 274
 275 config MARCH_Z9_109_TUNE
 276         def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
 277
 278 config MARCH_Z10_TUNE
 279         def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
 280
 281 config MARCH_Z196_TUNE
 282         def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
 283
 284 config MARCH_ZEC12_TUNE
 285         def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
 286
 287 config MARCH_Z13_TUNE
 288         def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
 289
 290 choice
 291         prompt "Tune code generation"
 292         default TUNE_DEFAULT
 293         help
 294           Cause the compiler to tune (-mtune) the generated code for a machine.
 295           This will make the code run faster on the selected machine but
 296           somewhat slower on other machines.
 297           This option only changes how the compiler emits instructions, not the
 298           selection of instructions itself, so the resulting kernel will run on
 299           all other machines.
 300
 301 config TUNE_DEFAULT
 302         bool "Default"
 303         help
 304           Tune the generated code for the target processor for which the kernel
 305           will be compiled.
 306
 307 config TUNE_G5
 308         bool "System/390 model G5 and G6"
 309
 310 config TUNE_Z900
 311         bool "IBM zSeries model z800 and z900"
 312
 313 config TUNE_Z990
 314         bool "IBM zSeries model z890 and z990"
 315
 316 config TUNE_Z9_109
 317         bool "IBM System z9"
 318
 319 config TUNE_Z10
 320         bool "IBM System z10"
 321
 322 config TUNE_Z196
 323         bool "IBM zEnterprise 114 and 196"
 324
 325 config TUNE_ZEC12
 326         bool "IBM zBC12 and zEC12"
 327
 328 config TUNE_Z13
 329         bool "IBM z13"
 330
 331 endchoice
 332
 333 config 64BIT
 334         def_bool y
 335         prompt "64 bit kernel"
 336         help
 337           Select this option if you have an IBM z/Architecture machine
 338           and want to use the 64 bit addressing mode.
 339
 340 config 32BIT
 341         def_bool y if !64BIT
 342
 343 config COMPAT
 344         def_bool y
 345         prompt "Kernel support for 31 bit emulation"
 346         depends on 64BIT
 347         select COMPAT_BINFMT_ELF if BINFMT_ELF
 348         select ARCH_WANT_OLD_COMPAT_IPC
 349         select COMPAT_OLD_SIGACTION
 350         help
 351           Select this option if you want to enable your system kernel to
 352           handle system-calls from ELF binaries for 31 bit ESA.  This option
 353           (and some other stuff like libraries and such) is needed for
 354           executing 31 bit applications.  It is safe to say "Y".
 355
 356 config SYSVIPC_COMPAT
 357         def_bool y if COMPAT && SYSVIPC
 358
 359 config KEYS_COMPAT
 360         def_bool y if COMPAT && KEYS
 361
 362 config SMP
 363         def_bool y
 364         prompt "Symmetric multi-processing support"
 365         ---help---
 366           This enables support for systems with more than one CPU. If you have
 367           a system with only one CPU, like most personal computers, say N. If
 368           you have a system with more than one CPU, say Y.
 369
 370           If you say N here, the kernel will run on uni- and multiprocessor
 371           machines, but will use only one CPU of a multiprocessor machine. If
 372           you say Y here, the kernel will run on many, but not all,
 373           uniprocessor machines. On a uniprocessor machine, the kernel
 374           will run faster if you say N here.
 375
 376           See also the SMP-HOWTO available at
 377           <http://www.tldp.org/docs.html#howto>.
 378
 379           Even if you don't know what to do here, say Y.
 380
 381 config NR_CPUS
 382         int "Maximum number of CPUs (2-512)"
 383         range 2 512
 384         depends on SMP
 385         default "32" if !64BIT
 386         default "64" if 64BIT
 387         help
 388           This allows you to specify the maximum number of CPUs which this
 389           kernel will support. The maximum supported value is 512 and the
 390           minimum value which makes sense is 2.
 391
 392           This is purely to save memory - each supported CPU adds
 393           approximately sixteen kilobytes to the kernel image.
 394
 395 config HOTPLUG_CPU
 396         def_bool y
 397         prompt "Support for hot-pluggable CPUs"
 398         depends on SMP
 399         help
 400           Say Y here to be able to turn CPUs off and on. CPUs
 401           can be controlled through /sys/devices/system/cpu/cpu#.
 402           Say N if you want to disable CPU hotplug.
 403
 404 config SCHED_SMT
 405         def_bool n
 406
 407 config SCHED_MC
 408         def_bool n
 409
 410 config SCHED_BOOK
 411         def_bool n
 412
 413 config SCHED_TOPOLOGY
 414         def_bool y
 415         prompt "Topology scheduler support"
 416         depends on SMP
 417         select SCHED_SMT
 418         select SCHED_MC
 419         select SCHED_BOOK
 420         help
 421           Topology scheduler support improves the CPU scheduler's decision
 422           making when dealing with machines that have multi-threading,
 423           multiple cores or multiple books.
 424
 425 source kernel/Kconfig.preempt
 426
 427 config MATHEMU
 428         def_bool y
 429         prompt "IEEE FPU emulation"
 430         depends on MARCH_G5
 431         help
 432           This option is required for IEEE compliant floating point arithmetic
 433           on older ESA/390 machines. Say Y unless you know your machine doesn't
 434           need this.
 435
 436 source kernel/Kconfig.hz
 437
 438 endmenu
 439
 440 menu "Memory setup"
 441
 442 config ARCH_SPARSEMEM_ENABLE
 443         def_bool y
 444         select SPARSEMEM_VMEMMAP_ENABLE
 445         select SPARSEMEM_VMEMMAP
 446         select SPARSEMEM_STATIC if !64BIT
 447
 448 config ARCH_SPARSEMEM_DEFAULT
 449         def_bool y
 450
 451 config ARCH_SELECT_MEMORY_MODEL
 452         def_bool y
 453
 454 config ARCH_ENABLE_MEMORY_HOTPLUG
 455         def_bool y if SPARSEMEM
 456
 457 config ARCH_ENABLE_MEMORY_HOTREMOVE
 458         def_bool y
 459
 460 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
 461         def_bool y
 462         depends on 64BIT
 463
 464 config FORCE_MAX_ZONEORDER
 465         int
 466         default "9"
 467
 468 source "mm/Kconfig"
 469
 470 config PACK_STACK
 471         def_bool y
 472         prompt "Pack kernel stack"
 473         help
 474           This option enables the compiler option -mkernel-backchain if it
 475           is available. If the option is available the compiler supports
 476           the new stack layout which dramatically reduces the minimum stack
 477           frame size. With an old compiler a non-leaf function needs a
 478           minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
 479           -mkernel-backchain the minimum size drops to 16 byte on 31 bit
 480           and 24 byte on 64 bit.
 481
 482           Say Y if you are unsure.
 483
 484 config CHECK_STACK
 485         def_bool y
 486         prompt "Detect kernel stack overflow"
 487         help
 488           This option enables the compiler option -mstack-guard and
 489           -mstack-size if they are available. If the compiler supports them
 490           it will emit additional code to each function prolog to trigger
 491           an illegal operation if the kernel stack is about to overflow.
 492
 493           Say N if you are unsure.
 494
 495 config STACK_GUARD
 496         int "Size of the guard area (128-1024)"
 497         range 128 1024
 498         depends on CHECK_STACK
 499         default "256"
 500         help
 501           This allows you to specify the size of the guard area at the lower
 502           end of the kernel stack. If the kernel stack points into the guard
 503           area on function entry an illegal operation is triggered. The size
 504           needs to be a power of 2. Please keep in mind that the size of an
 505           interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
 506           The minimum size for the stack guard should be 256 for 31 bit and
 507           512 for 64 bit.
 508
 509 config WARN_DYNAMIC_STACK
 510         def_bool n
 511         prompt "Emit compiler warnings for function with dynamic stack usage"
 512         help
 513           This option enables the compiler option -mwarn-dynamicstack. If the
 514           compiler supports this options generates warnings for functions
 515           that dynamically allocate stack space using alloca.
 516
 517           Say N if you are unsure.
 518
 519 endmenu
 520
 521 menu "I/O subsystem"
 522
 523 config QDIO
 524         def_tristate y
 525         prompt "QDIO support"
 526         ---help---
 527           This driver provides the Queued Direct I/O base support for
 528           IBM System z.
 529
 530           To compile this driver as a module, choose M here: the
 531           module will be called qdio.
 532
 533           If unsure, say Y.
 534
 535 menuconfig PCI
 536         bool "PCI support"
 537         depends on 64BIT
 538         select HAVE_DMA_ATTRS
 539         select PCI_MSI
 540         help
 541           Enable PCI support.
 542
 543 if PCI
 544
 545 config PCI_NR_FUNCTIONS
 546         int "Maximum number of PCI functions (1-4096)"
 547         range 1 4096
 548         default "64"
 549         help
 550           This allows you to specify the maximum number of PCI functions which
 551           this kernel will support.
 552
 553 config PCI_NR_MSI
 554         int "Maximum number of MSI interrupts (64-32768)"
 555         range 64 32768
 556         default "256"
 557         help
 558           This defines the number of virtual interrupts the kernel will
 559           provide for MSI interrupts. If you configure your system to have
 560           too few drivers will fail to allocate MSI interrupts for all
 561           PCI devices.
 562
 563 source "drivers/pci/Kconfig"
 564 source "drivers/pci/pcie/Kconfig"
 565 source "drivers/pci/hotplug/Kconfig"
 566
 567 endif   # PCI
 568
 569 config PCI_DOMAINS
 570         def_bool PCI
 571
 572 config HAS_IOMEM
 573         def_bool PCI
 574
 575 config IOMMU_HELPER
 576         def_bool PCI
 577
 578 config HAS_DMA
 579         def_bool PCI
 580         select HAVE_DMA_API_DEBUG
 581
 582 config NEED_SG_DMA_LENGTH
 583         def_bool PCI
 584
 585 config NEED_DMA_MAP_STATE
 586         def_bool PCI
 587
 588 config CHSC_SCH
 589         def_tristate m
 590         prompt "Support for CHSC subchannels"
 591         help
 592           This driver allows usage of CHSC subchannels. A CHSC subchannel
 593           is usually present on LPAR only.
 594           The driver creates a device /dev/chsc, which may be used to
 595           obtain I/O configuration information about the machine and
 596           to issue asynchronous chsc commands (DANGEROUS).
 597           You will usually only want to use this interface on a special
 598           LPAR designated for system management.
 599
 600           To compile this driver as a module, choose M here: the
 601           module will be called chsc_sch.
 602
 603           If unsure, say N.
 604
 605 config SCM_BUS
 606         def_bool y
 607         depends on 64BIT
 608         prompt "SCM bus driver"
 609         help
 610           Bus driver for Storage Class Memory.
 611
 612 config EADM_SCH
 613         def_tristate m
 614         prompt "Support for EADM subchannels"
 615         depends on SCM_BUS
 616         help
 617           This driver allows usage of EADM subchannels. EADM subchannels act
 618           as a communication vehicle for SCM increments.
 619
 620           To compile this driver as a module, choose M here: the
 621           module will be called eadm_sch.
 622
 623 endmenu
 624
 625 menu "Dump support"
 626
 627 config CRASH_DUMP
 628         bool "kernel crash dumps"
 629         depends on 64BIT && SMP
 630         select KEXEC
 631         help
 632           Generate crash dump after being started by kexec.
 633           Crash dump kernels are loaded in the main kernel with kexec-tools
 634           into a specially reserved region and then later executed after
 635           a crash by kdump/kexec.
 636           Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
 637           This option also enables s390 zfcpdump.
 638           See also <file:Documentation/s390/zfcpdump.txt>
 639
 640 endmenu
 641
 642 menu "Executable file formats / Emulations"
 643
 644 source "fs/Kconfig.binfmt"
 645
 646 config SECCOMP
 647         def_bool y
 648         prompt "Enable seccomp to safely compute untrusted bytecode"
 649         depends on PROC_FS
 650         help
 651           This kernel feature is useful for number crunching applications
 652           that may need to compute untrusted bytecode during their
 653           execution. By using pipes or other transports made available to
 654           the process as file descriptors supporting the read/write
 655           syscalls, it's possible to isolate those applications in
 656           their own address space using seccomp. Once seccomp is
 657           enabled via /proc/<pid>/seccomp, it cannot be disabled
 658           and the task is only allowed to execute a few safe syscalls
 659           defined by each seccomp mode.
 660
 661           If unsure, say Y.
 662
 663 endmenu
 664
 665 menu "Power Management"
 666
 667 config ARCH_HIBERNATION_POSSIBLE
 668         def_bool y if 64BIT
 669
 670 source "kernel/power/Kconfig"
 671
 672 endmenu
 673
 674 source "net/Kconfig"
 675
 676 config PCMCIA
 677         def_bool n
 678
 679 config CCW
 680         def_bool y
 681
 682 source "drivers/Kconfig"
 683
 684 source "fs/Kconfig"
 685
 686 source "arch/s390/Kconfig.debug"
 687
 688 source "security/Kconfig"
 689
 690 source "crypto/Kconfig"
 691
 692 source "lib/Kconfig"
 693
 694 menu "Virtualization"
 695
 696 config PFAULT
 697         def_bool y
 698         prompt "Pseudo page fault support"
 699         help
 700           Select this option, if you want to use PFAULT pseudo page fault
 701           handling under VM. If running native or in LPAR, this option
 702           has no effect. If your VM does not support PFAULT, PAGEEX
 703           pseudo page fault handling will be used.
 704           Note that VM 4.2 supports PFAULT but has a bug in its
 705           implementation that causes some problems.
 706           Everybody who wants to run Linux under VM != VM4.2 should select
 707           this option.
 708
 709 config SHARED_KERNEL
 710         bool "VM shared kernel support"
 711         depends on !JUMP_LABEL
 712         help
 713           Select this option, if you want to share the text segment of the
 714           Linux kernel between different VM guests. This reduces memory
 715           usage with lots of guests but greatly increases kernel size.
 716           Also if a kernel was IPL'ed from a shared segment the kexec system
 717           call will not work.
 718           You should only select this option if you know what you are
 719           doing and want to exploit this feature.
 720
 721 config CMM
 722         def_tristate n
 723         prompt "Cooperative memory management"
 724         help
 725           Select this option, if you want to enable the kernel interface
 726           to reduce the memory size of the system. This is accomplished
 727           by allocating pages of memory and put them "on hold". This only
 728           makes sense for a system running under VM where the unused pages
 729           will be reused by VM for other guest systems. The interface
 730           allows an external monitor to balance memory of many systems.
 731           Everybody who wants to run Linux under VM should select this
 732           option.
 733
 734 config CMM_IUCV
 735         def_bool y
 736         prompt "IUCV special message interface to cooperative memory management"
 737         depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
 738         help
 739           Select this option to enable the special message interface to
 740           the cooperative memory management.
 741
 742 config APPLDATA_BASE
 743         def_bool n
 744         prompt "Linux - VM Monitor Stream, base infrastructure"
 745         depends on PROC_FS
 746         help
 747           This provides a kernel interface for creating and updating z/VM APPLDATA
 748           monitor records. The monitor records are updated at certain time
 749           intervals, once the timer is started.
 750           Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
 751           i.e. enables or disables monitoring on the Linux side.
 752           A custom interval value (in seconds) can be written to
 753           /proc/appldata/interval.
 754
 755           Defaults are 60 seconds interval and timer off.
 756           The /proc entries can also be read from, showing the current settings.
 757
 758 config APPLDATA_MEM
 759         def_tristate m
 760         prompt "Monitor memory management statistics"
 761         depends on APPLDATA_BASE && VM_EVENT_COUNTERS
 762         help
 763           This provides memory management related data to the Linux - VM Monitor
 764           Stream, like paging/swapping rate, memory utilisation, etc.
 765           Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
 766           APPLDATA monitor record, i.e. enables or disables monitoring this record
 767           on the z/VM side.
 768
 769           Default is disabled.
 770           The /proc entry can also be read from, showing the current settings.
 771
 772           This can also be compiled as a module, which will be called
 773           appldata_mem.o.
 774
 775 config APPLDATA_OS
 776         def_tristate m
 777         prompt "Monitor OS statistics"
 778         depends on APPLDATA_BASE
 779         help
 780           This provides OS related data to the Linux - VM Monitor Stream, like
 781           CPU utilisation, etc.
 782           Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
 783           APPLDATA monitor record, i.e. enables or disables monitoring this record
 784           on the z/VM side.
 785
 786           Default is disabled.
 787           This can also be compiled as a module, which will be called
 788           appldata_os.o.
 789
 790 config APPLDATA_NET_SUM
 791         def_tristate m
 792         prompt "Monitor overall network statistics"
 793         depends on APPLDATA_BASE && NET
 794         help
 795           This provides network related data to the Linux - VM Monitor Stream,
 796           currently there is only a total sum of network I/O statistics, no
 797           per-interface data.
 798           Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
 799           APPLDATA monitor record, i.e. enables or disables monitoring this record
 800           on the z/VM side.
 801
 802           Default is disabled.
 803           This can also be compiled as a module, which will be called
 804           appldata_net_sum.o.
 805
 806 config S390_HYPFS_FS
 807         def_bool y
 808         prompt "s390 hypervisor file system support"
 809         select SYS_HYPERVISOR
 810         help
 811           This is a virtual file system intended to provide accounting
 812           information in an s390 hypervisor environment.
 813
 814 source "arch/s390/kvm/Kconfig"
 815
 816 config S390_GUEST
 817         def_bool y
 818         prompt "s390 support for virtio devices"
 819         depends on 64BIT
 820         select TTY
 821         select VIRTUALIZATION
 822         select VIRTIO
 823         select VIRTIO_CONSOLE
 824         help
 825           Enabling this option adds support for virtio based paravirtual device
 826           drivers on s390.
 827
 828           Select this option if you want to run the kernel as a guest under
 829           the KVM hypervisor.
 830
 831 endmenu