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 NO_IOMEM
  38         def_bool y
  39
  40 config NO_DMA
  41         def_bool y
  42
  43 config ARCH_DMA_ADDR_T_64BIT
  44         def_bool 64BIT
  45
  46 config GENERIC_LOCKBREAK
  47         def_bool y if SMP && PREEMPT
  48
  49 config PGSTE
  50         def_bool y if KVM
  51
  52 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  53         def_bool y
  54
  55 config KEXEC
  56         def_bool y
  57
  58 config AUDIT_ARCH
  59         def_bool y
  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_VIRT_CPU_ACCOUNTING
 100         select VIRT_CPU_ACCOUNTING
 101         select ARCH_DISCARD_MEMBLOCK
 102         select BUILDTIME_EXTABLE_SORT
 103         select ARCH_INLINE_SPIN_TRYLOCK
 104         select ARCH_INLINE_SPIN_TRYLOCK_BH
 105         select ARCH_INLINE_SPIN_LOCK
 106         select ARCH_INLINE_SPIN_LOCK_BH
 107         select ARCH_INLINE_SPIN_LOCK_IRQ
 108         select ARCH_INLINE_SPIN_LOCK_IRQSAVE
 109         select ARCH_INLINE_SPIN_UNLOCK
 110         select ARCH_INLINE_SPIN_UNLOCK_BH
 111         select ARCH_INLINE_SPIN_UNLOCK_IRQ
 112         select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
 113         select ARCH_INLINE_READ_TRYLOCK
 114         select ARCH_INLINE_READ_LOCK
 115         select ARCH_INLINE_READ_LOCK_BH
 116         select ARCH_INLINE_READ_LOCK_IRQ
 117         select ARCH_INLINE_READ_LOCK_IRQSAVE
 118         select ARCH_INLINE_READ_UNLOCK
 119         select ARCH_INLINE_READ_UNLOCK_BH
 120         select ARCH_INLINE_READ_UNLOCK_IRQ
 121         select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
 122         select ARCH_INLINE_WRITE_TRYLOCK
 123         select ARCH_INLINE_WRITE_LOCK
 124         select ARCH_INLINE_WRITE_LOCK_BH
 125         select ARCH_INLINE_WRITE_LOCK_IRQ
 126         select ARCH_INLINE_WRITE_LOCK_IRQSAVE
 127         select ARCH_INLINE_WRITE_UNLOCK
 128         select ARCH_INLINE_WRITE_UNLOCK_BH
 129         select ARCH_INLINE_WRITE_UNLOCK_IRQ
 130         select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
 131         select HAVE_UID16 if 32BIT
 132         select ARCH_WANT_IPC_PARSE_VERSION
 133         select GENERIC_SMP_IDLE_THREAD
 134         select GENERIC_TIME_VSYSCALL_OLD
 135         select GENERIC_CLOCKEVENTS
 136         select KTIME_SCALAR if 32BIT
 137         select HAVE_ARCH_SECCOMP_FILTER
 138         select GENERIC_KERNEL_THREAD
 139         select HAVE_MOD_ARCH_SPECIFIC
 140         select MODULES_USE_ELF_RELA
 141
 142 config SCHED_OMIT_FRAME_POINTER
 143         def_bool y
 144
 145 source "init/Kconfig"
 146
 147 source "kernel/Kconfig.freezer"
 148
 149 menu "Processor type and features"
 150
 151 config HAVE_MARCH_Z900_FEATURES
 152         def_bool n
 153
 154 config HAVE_MARCH_Z990_FEATURES
 155         def_bool n
 156         select HAVE_MARCH_Z900_FEATURES
 157
 158 config HAVE_MARCH_Z9_109_FEATURES
 159         def_bool n
 160         select HAVE_MARCH_Z990_FEATURES
 161
 162 config HAVE_MARCH_Z10_FEATURES
 163         def_bool n
 164         select HAVE_MARCH_Z9_109_FEATURES
 165
 166 config HAVE_MARCH_Z196_FEATURES
 167         def_bool n
 168         select HAVE_MARCH_Z10_FEATURES
 169
 170 choice
 171         prompt "Processor type"
 172         default MARCH_G5
 173
 174 config MARCH_G5
 175         bool "System/390 model G5 and G6"
 176         depends on !64BIT
 177         help
 178           Select this to build a 31 bit kernel that works
 179           on all ESA/390 and z/Architecture machines.
 180
 181 config MARCH_Z900
 182         bool "IBM zSeries model z800 and z900"
 183         select HAVE_MARCH_Z900_FEATURES if 64BIT
 184         help
 185           Select this to enable optimizations for model z800/z900 (2064 and
 186           2066 series). This will enable some optimizations that are not
 187           available on older ESA/390 (31 Bit) only CPUs.
 188
 189 config MARCH_Z990
 190         bool "IBM zSeries model z890 and z990"
 191         select HAVE_MARCH_Z990_FEATURES if 64BIT
 192         help
 193           Select this to enable optimizations for model z890/z990 (2084 and
 194           2086 series). The kernel will be slightly faster but will not work
 195           on older machines.
 196
 197 config MARCH_Z9_109
 198         bool "IBM System z9"
 199         select HAVE_MARCH_Z9_109_FEATURES if 64BIT
 200         help
 201           Select this to enable optimizations for IBM System z9 (2094 and
 202           2096 series). The kernel will be slightly faster but will not work
 203           on older machines.
 204
 205 config MARCH_Z10
 206         bool "IBM System z10"
 207         select HAVE_MARCH_Z10_FEATURES if 64BIT
 208         help
 209           Select this to enable optimizations for IBM System z10 (2097 and
 210           2098 series). The kernel will be slightly faster but will not work
 211           on older machines.
 212
 213 config MARCH_Z196
 214         bool "IBM zEnterprise 114 and 196"
 215         select HAVE_MARCH_Z196_FEATURES if 64BIT
 216         help
 217           Select this to enable optimizations for IBM zEnterprise 114 and 196
 218           (2818 and 2817 series). The kernel will be slightly faster but will
 219           not work on older machines.
 220
 221 endchoice
 222
 223 config 64BIT
 224         def_bool y
 225         prompt "64 bit kernel"
 226         help
 227           Select this option if you have an IBM z/Architecture machine
 228           and want to use the 64 bit addressing mode.
 229
 230 config 32BIT
 231         def_bool y if !64BIT
 232
 233 config COMPAT
 234         def_bool y
 235         prompt "Kernel support for 31 bit emulation"
 236         depends on 64BIT
 237         select COMPAT_BINFMT_ELF if BINFMT_ELF
 238         select ARCH_WANT_OLD_COMPAT_IPC
 239         help
 240           Select this option if you want to enable your system kernel to
 241           handle system-calls from ELF binaries for 31 bit ESA.  This option
 242           (and some other stuff like libraries and such) is needed for
 243           executing 31 bit applications.  It is safe to say "Y".
 244
 245 config SYSVIPC_COMPAT
 246         def_bool y if COMPAT && SYSVIPC
 247
 248 config KEYS_COMPAT
 249         def_bool y if COMPAT && KEYS
 250
 251 config SMP
 252         def_bool y
 253         prompt "Symmetric multi-processing support"
 254         ---help---
 255           This enables support for systems with more than one CPU. If you have
 256           a system with only one CPU, like most personal computers, say N. If
 257           you have a system with more than one CPU, say Y.
 258
 259           If you say N here, the kernel will run on single and multiprocessor
 260           machines, but will use only one CPU of a multiprocessor machine. If
 261           you say Y here, the kernel will run on many, but not all,
 262           singleprocessor machines. On a singleprocessor machine, the kernel
 263           will run faster if you say N here.
 264
 265           See also the SMP-HOWTO available at
 266           <http://www.tldp.org/docs.html#howto>.
 267
 268           Even if you don't know what to do here, say Y.
 269
 270 config NR_CPUS
 271         int "Maximum number of CPUs (2-64)"
 272         range 2 64
 273         depends on SMP
 274         default "32" if !64BIT
 275         default "64" if 64BIT
 276         help
 277           This allows you to specify the maximum number of CPUs which this
 278           kernel will support.  The maximum supported value is 64 and the
 279           minimum value which makes sense is 2.
 280
 281           This is purely to save memory - each supported CPU adds
 282           approximately sixteen kilobytes to the kernel image.
 283
 284 config HOTPLUG_CPU
 285         def_bool y
 286         prompt "Support for hot-pluggable CPUs"
 287         depends on SMP
 288         select HOTPLUG
 289         help
 290           Say Y here to be able to turn CPUs off and on. CPUs
 291           can be controlled through /sys/devices/system/cpu/cpu#.
 292           Say N if you want to disable CPU hotplug.
 293
 294 config SCHED_MC
 295         def_bool n
 296
 297 config SCHED_BOOK
 298         def_bool y
 299         prompt "Book scheduler support"
 300         depends on SMP
 301         select SCHED_MC
 302         help
 303           Book scheduler support improves the CPU scheduler's decision making
 304           when dealing with machines that have several books.
 305
 306 source kernel/Kconfig.preempt
 307
 308 config MATHEMU
 309         def_bool y
 310         prompt "IEEE FPU emulation"
 311         depends on MARCH_G5
 312         help
 313           This option is required for IEEE compliant floating point arithmetic
 314           on older ESA/390 machines. Say Y unless you know your machine doesn't
 315           need this.
 316
 317 source kernel/Kconfig.hz
 318
 319 endmenu
 320
 321 menu "Memory setup"
 322
 323 config ARCH_SPARSEMEM_ENABLE
 324         def_bool y
 325         select SPARSEMEM_VMEMMAP_ENABLE
 326         select SPARSEMEM_VMEMMAP
 327         select SPARSEMEM_STATIC if !64BIT
 328
 329 config ARCH_SPARSEMEM_DEFAULT
 330         def_bool y
 331
 332 config ARCH_SELECT_MEMORY_MODEL
 333         def_bool y
 334
 335 config ARCH_ENABLE_MEMORY_HOTPLUG
 336         def_bool y if SPARSEMEM
 337
 338 config ARCH_ENABLE_MEMORY_HOTREMOVE
 339         def_bool y
 340
 341 config FORCE_MAX_ZONEORDER
 342         int
 343         default "9"
 344
 345 source "mm/Kconfig"
 346
 347 config PACK_STACK
 348         def_bool y
 349         prompt "Pack kernel stack"
 350         help
 351           This option enables the compiler option -mkernel-backchain if it
 352           is available. If the option is available the compiler supports
 353           the new stack layout which dramatically reduces the minimum stack
 354           frame size. With an old compiler a non-leaf function needs a
 355           minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
 356           -mkernel-backchain the minimum size drops to 16 byte on 31 bit
 357           and 24 byte on 64 bit.
 358
 359           Say Y if you are unsure.
 360
 361 config SMALL_STACK
 362         def_bool n
 363         prompt "Use 8kb for kernel stack instead of 16kb"
 364         depends on PACK_STACK && 64BIT && !LOCKDEP
 365         help
 366           If you say Y here and the compiler supports the -mkernel-backchain
 367           option the kernel will use a smaller kernel stack size. The reduced
 368           size is 8kb instead of 16kb. This allows to run more threads on a
 369           system and reduces the pressure on the memory management for higher
 370           order page allocations.
 371
 372           Say N if you are unsure.
 373
 374 config CHECK_STACK
 375         def_bool y
 376         prompt "Detect kernel stack overflow"
 377         help
 378           This option enables the compiler option -mstack-guard and
 379           -mstack-size if they are available. If the compiler supports them
 380           it will emit additional code to each function prolog to trigger
 381           an illegal operation if the kernel stack is about to overflow.
 382
 383           Say N if you are unsure.
 384
 385 config STACK_GUARD
 386         int "Size of the guard area (128-1024)"
 387         range 128 1024
 388         depends on CHECK_STACK
 389         default "256"
 390         help
 391           This allows you to specify the size of the guard area at the lower
 392           end of the kernel stack. If the kernel stack points into the guard
 393           area on function entry an illegal operation is triggered. The size
 394           needs to be a power of 2. Please keep in mind that the size of an
 395           interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
 396           The minimum size for the stack guard should be 256 for 31 bit and
 397           512 for 64 bit.
 398
 399 config WARN_DYNAMIC_STACK
 400         def_bool n
 401         prompt "Emit compiler warnings for function with dynamic stack usage"
 402         help
 403           This option enables the compiler option -mwarn-dynamicstack. If the
 404           compiler supports this options generates warnings for functions
 405           that dynamically allocate stack space using alloca.
 406
 407           Say N if you are unsure.
 408
 409 endmenu
 410
 411 menu "I/O subsystem"
 412
 413 config QDIO
 414         def_tristate y
 415         prompt "QDIO support"
 416         ---help---
 417           This driver provides the Queued Direct I/O base support for
 418           IBM System z.
 419
 420           To compile this driver as a module, choose M here: the
 421           module will be called qdio.
 422
 423           If unsure, say Y.
 424
 425 config CHSC_SCH
 426         def_tristate m
 427         prompt "Support for CHSC subchannels"
 428         help
 429           This driver allows usage of CHSC subchannels. A CHSC subchannel
 430           is usually present on LPAR only.
 431           The driver creates a device /dev/chsc, which may be used to
 432           obtain I/O configuration information about the machine and
 433           to issue asynchronous chsc commands (DANGEROUS).
 434           You will usually only want to use this interface on a special
 435           LPAR designated for system management.
 436
 437           To compile this driver as a module, choose M here: the
 438           module will be called chsc_sch.
 439
 440           If unsure, say N.
 441
 442 config SCM_BUS
 443         def_bool y
 444         depends on 64BIT
 445         prompt "SCM bus driver"
 446         help
 447           Bus driver for Storage Class Memory.
 448
 449 config EADM_SCH
 450         def_tristate m
 451         prompt "Support for EADM subchannels"
 452         depends on SCM_BUS
 453         help
 454           This driver allows usage of EADM subchannels. EADM subchannels act
 455           as a communication vehicle for SCM increments.
 456
 457           To compile this driver as a module, choose M here: the
 458           module will be called eadm_sch.
 459
 460 endmenu
 461
 462 menu "Dump support"
 463
 464 config CRASH_DUMP
 465         bool "kernel crash dumps"
 466         depends on 64BIT && SMP
 467         select KEXEC
 468         help
 469           Generate crash dump after being started by kexec.
 470           Crash dump kernels are loaded in the main kernel with kexec-tools
 471           into a specially reserved region and then later executed after
 472           a crash by kdump/kexec.
 473           For more details see Documentation/kdump/kdump.txt
 474
 475 config ZFCPDUMP
 476         def_bool n
 477         prompt "zfcpdump support"
 478         select SMP
 479         help
 480           Select this option if you want to build an zfcpdump enabled kernel.
 481           Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
 482
 483 endmenu
 484
 485 menu "Executable file formats / Emulations"
 486
 487 source "fs/Kconfig.binfmt"
 488
 489 config SECCOMP
 490         def_bool y
 491         prompt "Enable seccomp to safely compute untrusted bytecode"
 492         depends on PROC_FS
 493         help
 494           This kernel feature is useful for number crunching applications
 495           that may need to compute untrusted bytecode during their
 496           execution. By using pipes or other transports made available to
 497           the process as file descriptors supporting the read/write
 498           syscalls, it's possible to isolate those applications in
 499           their own address space using seccomp. Once seccomp is
 500           enabled via /proc/<pid>/seccomp, it cannot be disabled
 501           and the task is only allowed to execute a few safe syscalls
 502           defined by each seccomp mode.
 503
 504           If unsure, say Y.
 505
 506 endmenu
 507
 508 menu "Power Management"
 509
 510 config ARCH_HIBERNATION_POSSIBLE
 511         def_bool y if 64BIT
 512
 513 source "kernel/power/Kconfig"
 514
 515 endmenu
 516
 517 source "net/Kconfig"
 518
 519 config PCMCIA
 520         def_bool n
 521
 522 config CCW
 523         def_bool y
 524
 525 source "drivers/Kconfig"
 526
 527 source "fs/Kconfig"
 528
 529 source "arch/s390/Kconfig.debug"
 530
 531 source "security/Kconfig"
 532
 533 source "crypto/Kconfig"
 534
 535 source "lib/Kconfig"
 536
 537 menu "Virtualization"
 538
 539 config PFAULT
 540         def_bool y
 541         prompt "Pseudo page fault support"
 542         help
 543           Select this option, if you want to use PFAULT pseudo page fault
 544           handling under VM. If running native or in LPAR, this option
 545           has no effect. If your VM does not support PFAULT, PAGEEX
 546           pseudo page fault handling will be used.
 547           Note that VM 4.2 supports PFAULT but has a bug in its
 548           implementation that causes some problems.
 549           Everybody who wants to run Linux under VM != VM4.2 should select
 550           this option.
 551
 552 config SHARED_KERNEL
 553         bool "VM shared kernel support"
 554         depends on !JUMP_LABEL
 555         help
 556           Select this option, if you want to share the text segment of the
 557           Linux kernel between different VM guests. This reduces memory
 558           usage with lots of guests but greatly increases kernel size.
 559           Also if a kernel was IPL'ed from a shared segment the kexec system
 560           call will not work.
 561           You should only select this option if you know what you are
 562           doing and want to exploit this feature.
 563
 564 config CMM
 565         def_tristate n
 566         prompt "Cooperative memory management"
 567         help
 568           Select this option, if you want to enable the kernel interface
 569           to reduce the memory size of the system. This is accomplished
 570           by allocating pages of memory and put them "on hold". This only
 571           makes sense for a system running under VM where the unused pages
 572           will be reused by VM for other guest systems. The interface
 573           allows an external monitor to balance memory of many systems.
 574           Everybody who wants to run Linux under VM should select this
 575           option.
 576
 577 config CMM_IUCV
 578         def_bool y
 579         prompt "IUCV special message interface to cooperative memory management"
 580         depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
 581         help
 582           Select this option to enable the special message interface to
 583           the cooperative memory management.
 584
 585 config APPLDATA_BASE
 586         def_bool n
 587         prompt "Linux - VM Monitor Stream, base infrastructure"
 588         depends on PROC_FS
 589         help
 590           This provides a kernel interface for creating and updating z/VM APPLDATA
 591           monitor records. The monitor records are updated at certain time
 592           intervals, once the timer is started.
 593           Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
 594           i.e. enables or disables monitoring on the Linux side.
 595           A custom interval value (in seconds) can be written to
 596           /proc/appldata/interval.
 597
 598           Defaults are 60 seconds interval and timer off.
 599           The /proc entries can also be read from, showing the current settings.
 600
 601 config APPLDATA_MEM
 602         def_tristate m
 603         prompt "Monitor memory management statistics"
 604         depends on APPLDATA_BASE && VM_EVENT_COUNTERS
 605         help
 606           This provides memory management related data to the Linux - VM Monitor
 607           Stream, like paging/swapping rate, memory utilisation, etc.
 608           Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
 609           APPLDATA monitor record, i.e. enables or disables monitoring this record
 610           on the z/VM side.
 611
 612           Default is disabled.
 613           The /proc entry can also be read from, showing the current settings.
 614
 615           This can also be compiled as a module, which will be called
 616           appldata_mem.o.
 617
 618 config APPLDATA_OS
 619         def_tristate m
 620         prompt "Monitor OS statistics"
 621         depends on APPLDATA_BASE
 622         help
 623           This provides OS related data to the Linux - VM Monitor Stream, like
 624           CPU utilisation, etc.
 625           Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
 626           APPLDATA monitor record, i.e. enables or disables monitoring this record
 627           on the z/VM side.
 628
 629           Default is disabled.
 630           This can also be compiled as a module, which will be called
 631           appldata_os.o.
 632
 633 config APPLDATA_NET_SUM
 634         def_tristate m
 635         prompt "Monitor overall network statistics"
 636         depends on APPLDATA_BASE && NET
 637         help
 638           This provides network related data to the Linux - VM Monitor Stream,
 639           currently there is only a total sum of network I/O statistics, no
 640           per-interface data.
 641           Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
 642           APPLDATA monitor record, i.e. enables or disables monitoring this record
 643           on the z/VM side.
 644
 645           Default is disabled.
 646           This can also be compiled as a module, which will be called
 647           appldata_net_sum.o.
 648
 649 config S390_HYPFS_FS
 650         def_bool y
 651         prompt "s390 hypervisor file system support"
 652         select SYS_HYPERVISOR
 653         help
 654           This is a virtual file system intended to provide accounting
 655           information in an s390 hypervisor environment.
 656
 657 source "arch/s390/kvm/Kconfig"
 658
 659 config S390_GUEST
 660         def_bool y
 661         prompt "s390 support for virtio devices (EXPERIMENTAL)"
 662         depends on 64BIT && EXPERIMENTAL
 663         select VIRTUALIZATION
 664         select VIRTIO
 665         select VIRTIO_CONSOLE
 666         help
 667           Enabling this option adds support for virtio based paravirtual device
 668           drivers on s390.
 669
 670           Select this option if you want to run the kernel as a guest under
 671           the KVM hypervisor.
 672
 673 endmenu