Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

Linux/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_GCOV_PROFILE_ALL
 69         select ARCH_HAVE_NMI_SAFE_CMPXCHG
 70         select ARCH_INLINE_READ_LOCK
 71         select ARCH_INLINE_READ_LOCK_BH
 72         select ARCH_INLINE_READ_LOCK_IRQ
 73         select ARCH_INLINE_READ_LOCK_IRQSAVE
 74         select ARCH_INLINE_READ_TRYLOCK
 75         select ARCH_INLINE_READ_UNLOCK
 76         select ARCH_INLINE_READ_UNLOCK_BH
 77         select ARCH_INLINE_READ_UNLOCK_IRQ
 78         select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
 79         select ARCH_INLINE_SPIN_LOCK
 80         select ARCH_INLINE_SPIN_LOCK_BH
 81         select ARCH_INLINE_SPIN_LOCK_IRQ
 82         select ARCH_INLINE_SPIN_LOCK_IRQSAVE
 83         select ARCH_INLINE_SPIN_TRYLOCK
 84         select ARCH_INLINE_SPIN_TRYLOCK_BH
 85         select ARCH_INLINE_SPIN_UNLOCK
 86         select ARCH_INLINE_SPIN_UNLOCK_BH
 87         select ARCH_INLINE_SPIN_UNLOCK_IRQ
 88         select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
 89         select ARCH_INLINE_WRITE_LOCK
 90         select ARCH_INLINE_WRITE_LOCK_BH
 91         select ARCH_INLINE_WRITE_LOCK_IRQ
 92         select ARCH_INLINE_WRITE_LOCK_IRQSAVE
 93         select ARCH_INLINE_WRITE_TRYLOCK
 94         select ARCH_INLINE_WRITE_UNLOCK
 95         select ARCH_INLINE_WRITE_UNLOCK_BH
 96         select ARCH_INLINE_WRITE_UNLOCK_IRQ
 97         select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
 98         select ARCH_SAVE_PAGE_KEYS if HIBERNATION
 99         select ARCH_SUPPORTS_ATOMIC_RMW
100         select ARCH_USE_CMPXCHG_LOCKREF
101         select ARCH_WANT_IPC_PARSE_VERSION
102         select BUILDTIME_EXTABLE_SORT
103         select CLONE_BACKWARDS2
104         select DYNAMIC_FTRACE if FUNCTION_TRACER
105         select GENERIC_CLOCKEVENTS
106         select GENERIC_CPU_DEVICES if !SMP
107         select GENERIC_FIND_FIRST_BIT
108         select GENERIC_SMP_IDLE_THREAD
109         select GENERIC_TIME_VSYSCALL
110         select HAVE_ALIGNED_STRUCT_PAGE if SLUB
111         select HAVE_ARCH_AUDITSYSCALL
112         select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
113         select HAVE_ARCH_SECCOMP_FILTER
114         select HAVE_ARCH_TRACEHOOK
115         select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
116         select HAVE_BPF_JIT if 64BIT && PACK_STACK
117         select HAVE_CMPXCHG_DOUBLE
118         select HAVE_CMPXCHG_LOCAL
119         select HAVE_C_RECORDMCOUNT
120         select HAVE_DEBUG_KMEMLEAK
121         select HAVE_DYNAMIC_FTRACE if 64BIT
122         select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT
123         select HAVE_FTRACE_MCOUNT_RECORD
124         select HAVE_FUNCTION_GRAPH_TRACER if 64BIT
125         select HAVE_FUNCTION_TRACER if 64BIT
126         select HAVE_FUTEX_CMPXCHG if FUTEX
127         select HAVE_KERNEL_BZIP2
128         select HAVE_KERNEL_GZIP
129         select HAVE_KERNEL_LZ4
130         select HAVE_KERNEL_LZMA
131         select HAVE_KERNEL_LZO
132         select HAVE_KERNEL_XZ
133         select HAVE_KPROBES
134         select HAVE_KRETPROBES
135         select HAVE_KVM if 64BIT
136         select HAVE_MEMBLOCK
137         select HAVE_MEMBLOCK_NODE_MAP
138         select HAVE_MEMBLOCK_PHYS_MAP
139         select HAVE_MOD_ARCH_SPECIFIC
140         select HAVE_OPROFILE
141         select HAVE_PERF_EVENTS
142         select HAVE_REGS_AND_STACK_ACCESS_API
143         select HAVE_SYSCALL_TRACEPOINTS
144         select HAVE_UID16 if 32BIT
145         select HAVE_VIRT_CPU_ACCOUNTING
146         select MODULES_USE_ELF_RELA
147         select NO_BOOTMEM
148         select OLD_SIGACTION
149         select OLD_SIGSUSPEND3
150         select SYSCTL_EXCEPTION_TRACE
151         select TTY
152         select VIRT_CPU_ACCOUNTING
153         select VIRT_TO_BUS
154         select ARCH_HAS_SG_CHAIN
155 
156 config SCHED_OMIT_FRAME_POINTER
157         def_bool y
158 
159 source "init/Kconfig"
160 
161 source "kernel/Kconfig.freezer"
162 
163 menu "Processor type and features"
164 
165 config HAVE_MARCH_Z900_FEATURES
166         def_bool n
167 
168 config HAVE_MARCH_Z990_FEATURES
169         def_bool n
170         select HAVE_MARCH_Z900_FEATURES
171 
172 config HAVE_MARCH_Z9_109_FEATURES
173         def_bool n
174         select HAVE_MARCH_Z990_FEATURES
175 
176 config HAVE_MARCH_Z10_FEATURES
177         def_bool n
178         select HAVE_MARCH_Z9_109_FEATURES
179 
180 config HAVE_MARCH_Z196_FEATURES
181         def_bool n
182         select HAVE_MARCH_Z10_FEATURES
183 
184 config HAVE_MARCH_ZEC12_FEATURES
185         def_bool n
186         select HAVE_MARCH_Z196_FEATURES
187 
188 choice
189         prompt "Processor type"
190         default MARCH_G5
191 
192 config MARCH_G5
193         bool "System/390 model G5 and G6"
194         depends on !64BIT
195         help
196           Select this to build a 31 bit kernel that works
197           on all ESA/390 and z/Architecture machines.
198 
199 config MARCH_Z900
200         bool "IBM zSeries model z800 and z900"
201         select HAVE_MARCH_Z900_FEATURES if 64BIT
202         help
203           Select this to enable optimizations for model z800/z900 (2064 and
204           2066 series). This will enable some optimizations that are not
205           available on older ESA/390 (31 Bit) only CPUs.
206 
207 config MARCH_Z990
208         bool "IBM zSeries model z890 and z990"
209         select HAVE_MARCH_Z990_FEATURES if 64BIT
210         help
211           Select this to enable optimizations for model z890/z990 (2084 and
212           2086 series). The kernel will be slightly faster but will not work
213           on older machines.
214 
215 config MARCH_Z9_109
216         bool "IBM System z9"
217         select HAVE_MARCH_Z9_109_FEATURES if 64BIT
218         help
219           Select this to enable optimizations for IBM System z9 (2094 and
220           2096 series). The kernel will be slightly faster but will not work
221           on older machines.
222 
223 config MARCH_Z10
224         bool "IBM System z10"
225         select HAVE_MARCH_Z10_FEATURES if 64BIT
226         help
227           Select this to enable optimizations for IBM System z10 (2097 and
228           2098 series). The kernel will be slightly faster but will not work
229           on older machines.
230 
231 config MARCH_Z196
232         bool "IBM zEnterprise 114 and 196"
233         select HAVE_MARCH_Z196_FEATURES if 64BIT
234         help
235           Select this to enable optimizations for IBM zEnterprise 114 and 196
236           (2818 and 2817 series). The kernel will be slightly faster but will
237           not work on older machines.
238 
239 config MARCH_ZEC12
240         bool "IBM zBC12 and zEC12"
241         select HAVE_MARCH_ZEC12_FEATURES if 64BIT
242         help
243           Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
244           2827 series). The kernel will be slightly faster but will not work on
245           older machines.
246 
247 endchoice
248 
249 config MARCH_G5_TUNE
250         def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT
251 
252 config MARCH_Z900_TUNE
253         def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
254 
255 config MARCH_Z990_TUNE
256         def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
257 
258 config MARCH_Z9_109_TUNE
259         def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
260 
261 config MARCH_Z10_TUNE
262         def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
263 
264 config MARCH_Z196_TUNE
265         def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
266 
267 config MARCH_ZEC12_TUNE
268         def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
269 
270 choice
271         prompt "Tune code generation"
272         default TUNE_DEFAULT
273         help
274           Cause the compiler to tune (-mtune) the generated code for a machine.
275           This will make the code run faster on the selected machine but
276           somewhat slower on other machines.
277           This option only changes how the compiler emits instructions, not the
278           selection of instructions itself, so the resulting kernel will run on
279           all other machines.
280 
281 config TUNE_DEFAULT
282         bool "Default"
283         help
284           Tune the generated code for the target processor for which the kernel
285           will be compiled.
286 
287 config TUNE_G5
288         bool "System/390 model G5 and G6"
289 
290 config TUNE_Z900
291         bool "IBM zSeries model z800 and z900"
292 
293 config TUNE_Z990
294         bool "IBM zSeries model z890 and z990"
295 
296 config TUNE_Z9_109
297         bool "IBM System z9"
298 
299 config TUNE_Z10
300         bool "IBM System z10"
301 
302 config TUNE_Z196
303         bool "IBM zEnterprise 114 and 196"
304 
305 config TUNE_ZEC12
306         bool "IBM zBC12 and zEC12"
307 
308 endchoice
309 
310 config 64BIT
311         def_bool y
312         prompt "64 bit kernel"
313         help
314           Select this option if you have an IBM z/Architecture machine
315           and want to use the 64 bit addressing mode.
316 
317 config 32BIT
318         def_bool y if !64BIT
319 
320 config COMPAT
321         def_bool y
322         prompt "Kernel support for 31 bit emulation"
323         depends on 64BIT
324         select COMPAT_BINFMT_ELF if BINFMT_ELF
325         select ARCH_WANT_OLD_COMPAT_IPC
326         select COMPAT_OLD_SIGACTION
327         help
328           Select this option if you want to enable your system kernel to
329           handle system-calls from ELF binaries for 31 bit ESA.  This option
330           (and some other stuff like libraries and such) is needed for
331           executing 31 bit applications.  It is safe to say "Y".
332 
333 config SYSVIPC_COMPAT
334         def_bool y if COMPAT && SYSVIPC
335 
336 config KEYS_COMPAT
337         def_bool y if COMPAT && KEYS
338 
339 config SMP
340         def_bool y
341         prompt "Symmetric multi-processing support"
342         ---help---
343           This enables support for systems with more than one CPU. If you have
344           a system with only one CPU, like most personal computers, say N. If
345           you have a system with more than one CPU, say Y.
346 
347           If you say N here, the kernel will run on uni- and multiprocessor
348           machines, but will use only one CPU of a multiprocessor machine. If
349           you say Y here, the kernel will run on many, but not all,
350           uniprocessor machines. On a uniprocessor machine, the kernel
351           will run faster if you say N here.
352 
353           See also the SMP-HOWTO available at
354           <http://www.tldp.org/docs.html#howto>.
355 
356           Even if you don't know what to do here, say Y.
357 
358 config NR_CPUS
359         int "Maximum number of CPUs (2-256)"
360         range 2 256
361         depends on SMP
362         default "32" if !64BIT
363         default "64" if 64BIT
364         help
365           This allows you to specify the maximum number of CPUs which this
366           kernel will support. The maximum supported value is 256 and the
367           minimum value which makes sense is 2.
368 
369           This is purely to save memory - each supported CPU adds
370           approximately sixteen kilobytes to the kernel image.
371 
372 config HOTPLUG_CPU
373         def_bool y
374         prompt "Support for hot-pluggable CPUs"
375         depends on SMP
376         help
377           Say Y here to be able to turn CPUs off and on. CPUs
378           can be controlled through /sys/devices/system/cpu/cpu#.
379           Say N if you want to disable CPU hotplug.
380 
381 config SCHED_MC
382         def_bool n
383 
384 config SCHED_BOOK
385         def_bool y
386         prompt "Book scheduler support"
387         depends on SMP
388         select SCHED_MC
389         help
390           Book scheduler support improves the CPU scheduler's decision making
391           when dealing with machines that have several books.
392 
393 source kernel/Kconfig.preempt
394 
395 config MATHEMU
396         def_bool y
397         prompt "IEEE FPU emulation"
398         depends on MARCH_G5
399         help
400           This option is required for IEEE compliant floating point arithmetic
401           on older ESA/390 machines. Say Y unless you know your machine doesn't
402           need this.
403 
404 source kernel/Kconfig.hz
405 
406 endmenu
407 
408 menu "Memory setup"
409 
410 config ARCH_SPARSEMEM_ENABLE
411         def_bool y
412         select SPARSEMEM_VMEMMAP_ENABLE
413         select SPARSEMEM_VMEMMAP
414         select SPARSEMEM_STATIC if !64BIT
415 
416 config ARCH_SPARSEMEM_DEFAULT
417         def_bool y
418 
419 config ARCH_SELECT_MEMORY_MODEL
420         def_bool y
421 
422 config ARCH_ENABLE_MEMORY_HOTPLUG
423         def_bool y if SPARSEMEM
424 
425 config ARCH_ENABLE_MEMORY_HOTREMOVE
426         def_bool y
427 
428 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
429         def_bool y
430         depends on 64BIT
431 
432 config FORCE_MAX_ZONEORDER
433         int
434         default "9"
435 
436 source "mm/Kconfig"
437 
438 config PACK_STACK
439         def_bool y
440         prompt "Pack kernel stack"
441         help
442           This option enables the compiler option -mkernel-backchain if it
443           is available. If the option is available the compiler supports
444           the new stack layout which dramatically reduces the minimum stack
445           frame size. With an old compiler a non-leaf function needs a
446           minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
447           -mkernel-backchain the minimum size drops to 16 byte on 31 bit
448           and 24 byte on 64 bit.
449 
450           Say Y if you are unsure.
451 
452 config CHECK_STACK
453         def_bool y
454         prompt "Detect kernel stack overflow"
455         help
456           This option enables the compiler option -mstack-guard and
457           -mstack-size if they are available. If the compiler supports them
458           it will emit additional code to each function prolog to trigger
459           an illegal operation if the kernel stack is about to overflow.
460 
461           Say N if you are unsure.
462 
463 config STACK_GUARD
464         int "Size of the guard area (128-1024)"
465         range 128 1024
466         depends on CHECK_STACK
467         default "256"
468         help
469           This allows you to specify the size of the guard area at the lower
470           end of the kernel stack. If the kernel stack points into the guard
471           area on function entry an illegal operation is triggered. The size
472           needs to be a power of 2. Please keep in mind that the size of an
473           interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
474           The minimum size for the stack guard should be 256 for 31 bit and
475           512 for 64 bit.
476 
477 config WARN_DYNAMIC_STACK
478         def_bool n
479         prompt "Emit compiler warnings for function with dynamic stack usage"
480         help
481           This option enables the compiler option -mwarn-dynamicstack. If the
482           compiler supports this options generates warnings for functions
483           that dynamically allocate stack space using alloca.
484 
485           Say N if you are unsure.
486 
487 endmenu
488 
489 menu "I/O subsystem"
490 
491 config QDIO
492         def_tristate y
493         prompt "QDIO support"
494         ---help---
495           This driver provides the Queued Direct I/O base support for
496           IBM System z.
497 
498           To compile this driver as a module, choose M here: the
499           module will be called qdio.
500 
501           If unsure, say Y.
502 
503 menuconfig PCI
504         bool "PCI support"
505         depends on 64BIT
506         select HAVE_DMA_ATTRS
507         select PCI_MSI
508         help
509           Enable PCI support.
510 
511 if PCI
512 
513 config PCI_NR_FUNCTIONS
514         int "Maximum number of PCI functions (1-4096)"
515         range 1 4096
516         default "64"
517         help
518           This allows you to specify the maximum number of PCI functions which
519           this kernel will support.
520 
521 config PCI_NR_MSI
522         int "Maximum number of MSI interrupts (64-32768)"
523         range 64 32768
524         default "256"
525         help
526           This defines the number of virtual interrupts the kernel will
527           provide for MSI interrupts. If you configure your system to have
528           too few drivers will fail to allocate MSI interrupts for all
529           PCI devices.
530 
531 source "drivers/pci/Kconfig"
532 source "drivers/pci/pcie/Kconfig"
533 source "drivers/pci/hotplug/Kconfig"
534 
535 endif   # PCI
536 
537 config PCI_DOMAINS
538         def_bool PCI
539 
540 config HAS_IOMEM
541         def_bool PCI
542 
543 config IOMMU_HELPER
544         def_bool PCI
545 
546 config HAS_DMA
547         def_bool PCI
548         select HAVE_DMA_API_DEBUG
549 
550 config NEED_SG_DMA_LENGTH
551         def_bool PCI
552 
553 config NEED_DMA_MAP_STATE
554         def_bool PCI
555 
556 config CHSC_SCH
557         def_tristate m
558         prompt "Support for CHSC subchannels"
559         help
560           This driver allows usage of CHSC subchannels. A CHSC subchannel
561           is usually present on LPAR only.
562           The driver creates a device /dev/chsc, which may be used to
563           obtain I/O configuration information about the machine and
564           to issue asynchronous chsc commands (DANGEROUS).
565           You will usually only want to use this interface on a special
566           LPAR designated for system management.
567 
568           To compile this driver as a module, choose M here: the
569           module will be called chsc_sch.
570 
571           If unsure, say N.
572 
573 config SCM_BUS
574         def_bool y
575         depends on 64BIT
576         prompt "SCM bus driver"
577         help
578           Bus driver for Storage Class Memory.
579 
580 config EADM_SCH
581         def_tristate m
582         prompt "Support for EADM subchannels"
583         depends on SCM_BUS
584         help
585           This driver allows usage of EADM subchannels. EADM subchannels act
586           as a communication vehicle for SCM increments.
587 
588           To compile this driver as a module, choose M here: the
589           module will be called eadm_sch.
590 
591 endmenu
592 
593 menu "Dump support"
594 
595 config CRASH_DUMP
596         bool "kernel crash dumps"
597         depends on 64BIT && SMP
598         select KEXEC
599         help
600           Generate crash dump after being started by kexec.
601           Crash dump kernels are loaded in the main kernel with kexec-tools
602           into a specially reserved region and then later executed after
603           a crash by kdump/kexec.
604           Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
605           This option also enables s390 zfcpdump.
606           See also <file:Documentation/s390/zfcpdump.txt>
607 
608 endmenu
609 
610 menu "Executable file formats / Emulations"
611 
612 source "fs/Kconfig.binfmt"
613 
614 config SECCOMP
615         def_bool y
616         prompt "Enable seccomp to safely compute untrusted bytecode"
617         depends on PROC_FS
618         help
619           This kernel feature is useful for number crunching applications
620           that may need to compute untrusted bytecode during their
621           execution. By using pipes or other transports made available to
622           the process as file descriptors supporting the read/write
623           syscalls, it's possible to isolate those applications in
624           their own address space using seccomp. Once seccomp is
625           enabled via /proc/<pid>/seccomp, it cannot be disabled
626           and the task is only allowed to execute a few safe syscalls
627           defined by each seccomp mode.
628 
629           If unsure, say Y.
630 
631 endmenu
632 
633 menu "Power Management"
634 
635 config ARCH_HIBERNATION_POSSIBLE
636         def_bool y if 64BIT
637 
638 source "kernel/power/Kconfig"
639 
640 endmenu
641 
642 source "net/Kconfig"
643 
644 config PCMCIA
645         def_bool n
646 
647 config CCW
648         def_bool y
649 
650 source "drivers/Kconfig"
651 
652 source "fs/Kconfig"
653 
654 source "arch/s390/Kconfig.debug"
655 
656 source "security/Kconfig"
657 
658 source "crypto/Kconfig"
659 
660 source "lib/Kconfig"
661 
662 menu "Virtualization"
663 
664 config PFAULT
665         def_bool y
666         prompt "Pseudo page fault support"
667         help
668           Select this option, if you want to use PFAULT pseudo page fault
669           handling under VM. If running native or in LPAR, this option
670           has no effect. If your VM does not support PFAULT, PAGEEX
671           pseudo page fault handling will be used.
672           Note that VM 4.2 supports PFAULT but has a bug in its
673           implementation that causes some problems.
674           Everybody who wants to run Linux under VM != VM4.2 should select
675           this option.
676 
677 config SHARED_KERNEL
678         bool "VM shared kernel support"
679         depends on !JUMP_LABEL
680         help
681           Select this option, if you want to share the text segment of the
682           Linux kernel between different VM guests. This reduces memory
683           usage with lots of guests but greatly increases kernel size.
684           Also if a kernel was IPL'ed from a shared segment the kexec system
685           call will not work.
686           You should only select this option if you know what you are
687           doing and want to exploit this feature.
688 
689 config CMM
690         def_tristate n
691         prompt "Cooperative memory management"
692         help
693           Select this option, if you want to enable the kernel interface
694           to reduce the memory size of the system. This is accomplished
695           by allocating pages of memory and put them "on hold". This only
696           makes sense for a system running under VM where the unused pages
697           will be reused by VM for other guest systems. The interface
698           allows an external monitor to balance memory of many systems.
699           Everybody who wants to run Linux under VM should select this
700           option.
701 
702 config CMM_IUCV
703         def_bool y
704         prompt "IUCV special message interface to cooperative memory management"
705         depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
706         help
707           Select this option to enable the special message interface to
708           the cooperative memory management.
709 
710 config APPLDATA_BASE
711         def_bool n
712         prompt "Linux - VM Monitor Stream, base infrastructure"
713         depends on PROC_FS
714         help
715           This provides a kernel interface for creating and updating z/VM APPLDATA
716           monitor records. The monitor records are updated at certain time
717           intervals, once the timer is started.
718           Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
719           i.e. enables or disables monitoring on the Linux side.
720           A custom interval value (in seconds) can be written to
721           /proc/appldata/interval.
722 
723           Defaults are 60 seconds interval and timer off.
724           The /proc entries can also be read from, showing the current settings.
725 
726 config APPLDATA_MEM
727         def_tristate m
728         prompt "Monitor memory management statistics"
729         depends on APPLDATA_BASE && VM_EVENT_COUNTERS
730         help
731           This provides memory management related data to the Linux - VM Monitor
732           Stream, like paging/swapping rate, memory utilisation, etc.
733           Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
734           APPLDATA monitor record, i.e. enables or disables monitoring this record
735           on the z/VM side.
736 
737           Default is disabled.
738           The /proc entry can also be read from, showing the current settings.
739 
740           This can also be compiled as a module, which will be called
741           appldata_mem.o.
742 
743 config APPLDATA_OS
744         def_tristate m
745         prompt "Monitor OS statistics"
746         depends on APPLDATA_BASE
747         help
748           This provides OS related data to the Linux - VM Monitor Stream, like
749           CPU utilisation, etc.
750           Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
751           APPLDATA monitor record, i.e. enables or disables monitoring this record
752           on the z/VM side.
753 
754           Default is disabled.
755           This can also be compiled as a module, which will be called
756           appldata_os.o.
757 
758 config APPLDATA_NET_SUM
759         def_tristate m
760         prompt "Monitor overall network statistics"
761         depends on APPLDATA_BASE && NET
762         help
763           This provides network related data to the Linux - VM Monitor Stream,
764           currently there is only a total sum of network I/O statistics, no
765           per-interface data.
766           Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
767           APPLDATA monitor record, i.e. enables or disables monitoring this record
768           on the z/VM side.
769 
770           Default is disabled.
771           This can also be compiled as a module, which will be called
772           appldata_net_sum.o.
773 
774 config S390_HYPFS_FS
775         def_bool y
776         prompt "s390 hypervisor file system support"
777         select SYS_HYPERVISOR
778         help
779           This is a virtual file system intended to provide accounting
780           information in an s390 hypervisor environment.
781 
782 source "arch/s390/kvm/Kconfig"
783 
784 config S390_GUEST
785         def_bool y
786         prompt "s390 support for virtio devices"
787         depends on 64BIT
788         select TTY
789         select VIRTUALIZATION
790         select VIRTIO
791         select VIRTIO_CONSOLE
792         help
793           Enabling this option adds support for virtio based paravirtual device
794           drivers on s390.
795 
796           Select this option if you want to run the kernel as a guest under
797           the KVM hypervisor.
798 
799 endmenu

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