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Linus Torvalds1da177e2005-04-16 15:20:36 -07001config MMU
Martin Schwidefsky61d48c22007-05-10 15:46:00 +02002 def_bool y
Linus Torvalds1da177e2005-04-16 15:20:36 -07003
Christoph Lameter66701b12007-02-10 01:43:09 -08004config ZONE_DMA
Heiko Carstens69dbb2f2011-05-26 09:48:31 +02005 def_bool y
Christoph Lameter66701b12007-02-10 01:43:09 -08006
Heiko Carstens2fd92272016-04-14 09:00:27 +02007config CPU_BIG_ENDIAN
8 def_bool y
9
Ingo Molnar2b105ff2006-07-03 00:25:02 -070010config LOCKDEP_SUPPORT
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020011 def_bool y
Ingo Molnar2b105ff2006-07-03 00:25:02 -070012
Heiko Carstens5bdc9b42006-07-03 00:24:41 -070013config STACKTRACE_SUPPORT
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020014 def_bool y
Heiko Carstens5bdc9b42006-07-03 00:24:41 -070015
Linus Torvalds1da177e2005-04-16 15:20:36 -070016config RWSEM_GENERIC_SPINLOCK
17 bool
18
19config RWSEM_XCHGADD_ALGORITHM
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020020 def_bool y
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
David Howellsf0d1b0b2006-12-08 02:37:49 -080022config ARCH_HAS_ILOG2_U32
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010023 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080024
25config ARCH_HAS_ILOG2_U64
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010026 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080027
Akinobu Mita7e33db42006-03-26 01:39:34 -080028config GENERIC_HWEIGHT
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020029 def_bool y
Akinobu Mita7e33db42006-03-26 01:39:34 -080030
Heiko Carstensc0007f12007-04-27 16:01:42 +020031config GENERIC_BUG
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010032 def_bool y if BUG
Heiko Carstensc0007f12007-04-27 16:01:42 +020033
Heiko Carstens52499f42010-02-26 22:37:44 +010034config GENERIC_BUG_RELATIVE_POINTERS
35 def_bool y
36
FUJITA Tomonorieca577e2010-10-25 16:10:50 +020037config ARCH_DMA_ADDR_T_64BIT
Heiko Carstens5a798592015-02-12 13:08:27 +010038 def_bool y
FUJITA Tomonorieca577e2010-10-25 16:10:50 +020039
Martin Schwidefskyb6b40c52008-02-05 16:50:42 +010040config GENERIC_LOCKBREAK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010041 def_bool y if SMP && PREEMPT
Martin Schwidefskyb6b40c52008-02-05 16:50:42 +010042
Carsten Otte402b0862008-03-25 18:47:10 +010043config PGSTE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010044 def_bool y if KVM
Carsten Otte402b0862008-03-25 18:47:10 +010045
Akinobu Mita6a11f752009-03-31 15:23:17 -070046config ARCH_SUPPORTS_DEBUG_PAGEALLOC
47 def_bool y
48
Jan Glauber843c48f2012-08-27 10:55:18 +020049config KEXEC
50 def_bool y
Dave Young2965faa2015-09-09 15:38:55 -070051 select KEXEC_CORE
Jan Glauber843c48f2012-08-27 10:55:18 +020052
53config AUDIT_ARCH
54 def_bool y
55
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -070056config NO_IOPORT_MAP
Jan Glauberc8717a32012-11-29 14:38:46 +010057 def_bool y
58
59config PCI_QUIRKS
60 def_bool n
61
Jan Willeke2a0a5b22014-09-22 16:39:06 +020062config ARCH_SUPPORTS_UPROBES
Heiko Carstens5a798592015-02-12 13:08:27 +010063 def_bool y
Jan Willeke2a0a5b22014-09-22 16:39:06 +020064
Heiko Carstens91d37212016-03-17 12:47:12 +010065config DEBUG_RODATA
66 def_bool y
67
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -080068config S390
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020069 def_bool y
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010070 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Heiko Carstens93bead42013-09-06 10:03:30 +020071 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
Dan Williams21266be2015-11-19 18:19:29 -080072 select ARCH_HAS_DEVMEM_IS_ALLOWED
Kees Cook2b68f6c2015-04-14 15:48:00 -070073 select ARCH_HAS_ELF_RANDOMIZE
Riku Voipio957e3fa2014-12-12 16:57:44 -080074 select ARCH_HAS_GCOV_PROFILE_ALL
Heiko Carstens47523c92014-12-22 10:07:04 +010075 select ARCH_HAS_SG_CHAIN
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010076 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Thomas Gleixner6beb0002009-11-09 15:21:34 +000077 select ARCH_INLINE_READ_LOCK
78 select ARCH_INLINE_READ_LOCK_BH
79 select ARCH_INLINE_READ_LOCK_IRQ
80 select ARCH_INLINE_READ_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010081 select ARCH_INLINE_READ_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000082 select ARCH_INLINE_READ_UNLOCK
83 select ARCH_INLINE_READ_UNLOCK_BH
84 select ARCH_INLINE_READ_UNLOCK_IRQ
85 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010086 select ARCH_INLINE_SPIN_LOCK
87 select ARCH_INLINE_SPIN_LOCK_BH
88 select ARCH_INLINE_SPIN_LOCK_IRQ
89 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
90 select ARCH_INLINE_SPIN_TRYLOCK
91 select ARCH_INLINE_SPIN_TRYLOCK_BH
92 select ARCH_INLINE_SPIN_UNLOCK
93 select ARCH_INLINE_SPIN_UNLOCK_BH
94 select ARCH_INLINE_SPIN_UNLOCK_IRQ
95 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
Thomas Gleixner6beb0002009-11-09 15:21:34 +000096 select ARCH_INLINE_WRITE_LOCK
97 select ARCH_INLINE_WRITE_LOCK_BH
98 select ARCH_INLINE_WRITE_LOCK_IRQ
99 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100100 select ARCH_INLINE_WRITE_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +0000101 select ARCH_INLINE_WRITE_UNLOCK
102 select ARCH_INLINE_WRITE_UNLOCK_BH
103 select ARCH_INLINE_WRITE_UNLOCK_IRQ
104 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100105 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
Christian Borntraeger36e7fda2014-08-05 09:57:51 +0200106 select ARCH_SUPPORTS_ATOMIC_RMW
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200107 select ARCH_SUPPORTS_NUMA_BALANCING
Christian Borntraeger295d8fa2015-10-29 01:16:04 +0100108 select ARCH_USE_BUILTIN_BSWAP
Heiko Carstensefc1d232013-09-05 13:26:17 +0200109 select ARCH_USE_CMPXCHG_LOCKREF
Martin Schwidefsky3f6813b2016-04-01 15:42:15 +0200110 select ARCH_WANTS_DYNAMIC_TASK_STRUCT
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200111 select ARCH_WANTS_PROT_NUMA_PROT_NONE
Will Deaconc1d7e012012-07-30 14:42:46 -0700112 select ARCH_WANT_IPC_PARSE_VERSION
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100113 select BUILDTIME_EXTABLE_SORT
114 select CLONE_BACKWARDS2
Heiko Carstens5d6a0162014-08-15 13:16:09 +0200115 select DYNAMIC_FTRACE if FUNCTION_TRACER
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100116 select GENERIC_CLOCKEVENTS
Hendrik Brueckner8f00b3e2015-02-19 12:22:02 +0100117 select GENERIC_CPU_AUTOPROBE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100118 select GENERIC_CPU_DEVICES if !SMP
Heiko Carstens746479c2013-09-18 11:45:36 +0200119 select GENERIC_FIND_FIRST_BIT
Thomas Gleixnere80e7812012-04-20 13:05:52 +0000120 select GENERIC_SMP_IDLE_THREAD
Martin Schwidefsky79c74ec2013-11-22 10:04:53 +0100121 select GENERIC_TIME_VSYSCALL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100122 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
AKASHI Takahiro7a017722014-02-25 18:16:24 +0900123 select HAVE_ARCH_AUDITSYSCALL
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200124 select HAVE_ARCH_EARLY_PFN_TO_NID
Heiko Carstens5a798592015-02-12 13:08:27 +0100125 select HAVE_ARCH_JUMP_LABEL
Heiko Carstensc63cb462012-07-31 15:37:13 +0200126 select HAVE_ARCH_SECCOMP_FILTER
Martin Schwidefsky5614dd92015-04-22 14:47:42 +0200127 select HAVE_ARCH_SOFT_DIRTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100128 select HAVE_ARCH_TRACEHOOK
Heiko Carstens5a798592015-02-12 13:08:27 +0100129 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
Heiko Carstens77a87f02015-04-21 16:50:08 +0200130 select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100131 select HAVE_CMPXCHG_DOUBLE
132 select HAVE_CMPXCHG_LOCAL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100133 select HAVE_DEBUG_KMEMLEAK
Christian Borntraegere82becfc2016-02-02 21:46:34 -0800134 select HAVE_DMA_API_DEBUG
Heiko Carstens5a798592015-02-12 13:08:27 +0100135 select HAVE_DYNAMIC_FTRACE
136 select HAVE_DYNAMIC_FTRACE_WITH_REGS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100137 select HAVE_FTRACE_MCOUNT_RECORD
Heiko Carstens5a798592015-02-12 13:08:27 +0100138 select HAVE_FUNCTION_GRAPH_TRACER
139 select HAVE_FUNCTION_TRACER
Heiko Carstens03b8c7b2014-03-02 13:09:47 +0100140 select HAVE_FUTEX_CMPXCHG if FUTEX
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100141 select HAVE_KERNEL_BZIP2
142 select HAVE_KERNEL_GZIP
Heiko Carstens8e2872c2013-07-18 15:18:24 +0200143 select HAVE_KERNEL_LZ4
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100144 select HAVE_KERNEL_LZMA
145 select HAVE_KERNEL_LZO
146 select HAVE_KERNEL_XZ
147 select HAVE_KPROBES
148 select HAVE_KRETPROBES
Heiko Carstens5a798592015-02-12 13:08:27 +0100149 select HAVE_KVM
Jiri Slaby21042d42015-03-26 10:10:17 +0100150 select HAVE_LIVEPATCH
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100151 select HAVE_MEMBLOCK
152 select HAVE_MEMBLOCK_NODE_MAP
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100153 select HAVE_MEMBLOCK_PHYS_MAP
David Howells786d35d2012-09-28 14:31:03 +0930154 select HAVE_MOD_ARCH_SPECIFIC
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100155 select HAVE_OPROFILE
156 select HAVE_PERF_EVENTS
157 select HAVE_REGS_AND_STACK_ACCESS_API
158 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100159 select HAVE_VIRT_CPU_ACCOUNTING
David Howells786d35d2012-09-28 14:31:03 +0930160 select MODULES_USE_ELF_RELA
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100161 select NO_BOOTMEM
Al Viro7eddd992012-12-25 19:26:12 -0500162 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200163 select OLD_SIGSUSPEND3
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100164 select SYSCTL_EXCEPTION_TRACE
Josh Triplett05634162014-02-26 18:13:06 -0800165 select TTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100166 select VIRT_CPU_ACCOUNTING
Heiko Carstens93bead42013-09-06 10:03:30 +0200167 select VIRT_TO_BUS
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200170config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100171 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200172
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700173config PGTABLE_LEVELS
174 int
Heiko Carstensc095a942015-12-28 12:53:51 +0100175 default 4
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177source "init/Kconfig"
178
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700179source "kernel/Kconfig.freezer"
180
Jiri Slaby21042d42015-03-26 10:10:17 +0100181source "kernel/livepatch/Kconfig"
182
Jan Glauber843c48f2012-08-27 10:55:18 +0200183menu "Processor type and features"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184
Jan Glauber843c48f2012-08-27 10:55:18 +0200185config HAVE_MARCH_Z900_FEATURES
186 def_bool n
187
188config HAVE_MARCH_Z990_FEATURES
189 def_bool n
190 select HAVE_MARCH_Z900_FEATURES
191
192config HAVE_MARCH_Z9_109_FEATURES
193 def_bool n
194 select HAVE_MARCH_Z990_FEATURES
195
196config HAVE_MARCH_Z10_FEATURES
197 def_bool n
198 select HAVE_MARCH_Z9_109_FEATURES
199
200config HAVE_MARCH_Z196_FEATURES
201 def_bool n
202 select HAVE_MARCH_Z10_FEATURES
203
Heiko Carstens991c15052012-11-13 10:26:37 +0200204config HAVE_MARCH_ZEC12_FEATURES
205 def_bool n
206 select HAVE_MARCH_Z196_FEATURES
207
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100208config HAVE_MARCH_Z13_FEATURES
209 def_bool n
210 select HAVE_MARCH_ZEC12_FEATURES
211
Jan Glauber843c48f2012-08-27 10:55:18 +0200212choice
213 prompt "Processor type"
Heiko Carstens5a798592015-02-12 13:08:27 +0100214 default MARCH_Z900
Jan Glauber843c48f2012-08-27 10:55:18 +0200215
216config MARCH_Z900
217 bool "IBM zSeries model z800 and z900"
Heiko Carstens5a798592015-02-12 13:08:27 +0100218 select HAVE_MARCH_Z900_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200219 help
220 Select this to enable optimizations for model z800/z900 (2064 and
221 2066 series). This will enable some optimizations that are not
222 available on older ESA/390 (31 Bit) only CPUs.
223
224config MARCH_Z990
225 bool "IBM zSeries model z890 and z990"
Heiko Carstens5a798592015-02-12 13:08:27 +0100226 select HAVE_MARCH_Z990_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200227 help
228 Select this to enable optimizations for model z890/z990 (2084 and
229 2086 series). The kernel will be slightly faster but will not work
230 on older machines.
231
232config MARCH_Z9_109
233 bool "IBM System z9"
Heiko Carstens5a798592015-02-12 13:08:27 +0100234 select HAVE_MARCH_Z9_109_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200235 help
236 Select this to enable optimizations for IBM System z9 (2094 and
237 2096 series). The kernel will be slightly faster but will not work
238 on older machines.
239
240config MARCH_Z10
241 bool "IBM System z10"
Heiko Carstens5a798592015-02-12 13:08:27 +0100242 select HAVE_MARCH_Z10_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200243 help
244 Select this to enable optimizations for IBM System z10 (2097 and
245 2098 series). The kernel will be slightly faster but will not work
246 on older machines.
247
248config MARCH_Z196
249 bool "IBM zEnterprise 114 and 196"
Heiko Carstens5a798592015-02-12 13:08:27 +0100250 select HAVE_MARCH_Z196_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200251 help
252 Select this to enable optimizations for IBM zEnterprise 114 and 196
253 (2818 and 2817 series). The kernel will be slightly faster but will
254 not work on older machines.
255
Heiko Carstens991c15052012-11-13 10:26:37 +0200256config MARCH_ZEC12
Heiko Carstens59471222013-07-24 10:35:33 +0200257 bool "IBM zBC12 and zEC12"
Heiko Carstens5a798592015-02-12 13:08:27 +0100258 select HAVE_MARCH_ZEC12_FEATURES
Heiko Carstens991c15052012-11-13 10:26:37 +0200259 help
Heiko Carstens59471222013-07-24 10:35:33 +0200260 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
261 2827 series). The kernel will be slightly faster but will not work on
262 older machines.
Heiko Carstens991c15052012-11-13 10:26:37 +0200263
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100264config MARCH_Z13
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100265 bool "IBM z13s and z13"
Heiko Carstens5a798592015-02-12 13:08:27 +0100266 select HAVE_MARCH_Z13_FEATURES
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100267 help
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100268 Select this to enable optimizations for IBM z13s and z13 (2965 and
269 2964 series). The kernel will be slightly faster but will not work on
270 older machines.
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100271
Jan Glauber843c48f2012-08-27 10:55:18 +0200272endchoice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Heiko Carstens1db9e052013-10-30 12:12:50 +0100274config MARCH_Z900_TUNE
275 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
276
277config MARCH_Z990_TUNE
278 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
279
280config MARCH_Z9_109_TUNE
281 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
282
283config MARCH_Z10_TUNE
284 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
285
286config MARCH_Z196_TUNE
287 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
288
289config MARCH_ZEC12_TUNE
290 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
291
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100292config MARCH_Z13_TUNE
293 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
294
Heiko Carstens1db9e052013-10-30 12:12:50 +0100295choice
296 prompt "Tune code generation"
297 default TUNE_DEFAULT
298 help
299 Cause the compiler to tune (-mtune) the generated code for a machine.
300 This will make the code run faster on the selected machine but
301 somewhat slower on other machines.
302 This option only changes how the compiler emits instructions, not the
303 selection of instructions itself, so the resulting kernel will run on
304 all other machines.
305
306config TUNE_DEFAULT
307 bool "Default"
308 help
309 Tune the generated code for the target processor for which the kernel
310 will be compiled.
311
Heiko Carstens1db9e052013-10-30 12:12:50 +0100312config TUNE_Z900
313 bool "IBM zSeries model z800 and z900"
314
315config TUNE_Z990
316 bool "IBM zSeries model z890 and z990"
317
318config TUNE_Z9_109
319 bool "IBM System z9"
320
321config TUNE_Z10
322 bool "IBM System z10"
323
324config TUNE_Z196
325 bool "IBM zEnterprise 114 and 196"
326
327config TUNE_ZEC12
328 bool "IBM zBC12 and zEC12"
329
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100330config TUNE_Z13
331 bool "IBM z13"
332
Heiko Carstens1db9e052013-10-30 12:12:50 +0100333endchoice
334
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800335config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100336 def_bool y
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200337
Jan Glauber843c48f2012-08-27 10:55:18 +0200338config COMPAT
339 def_bool y
340 prompt "Kernel support for 31 bit emulation"
Jan Glauber843c48f2012-08-27 10:55:18 +0200341 select COMPAT_BINFMT_ELF if BINFMT_ELF
342 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro7eddd992012-12-25 19:26:12 -0500343 select COMPAT_OLD_SIGACTION
Iulia Manda28138932015-04-15 16:16:41 -0700344 depends on MULTIUSER
Jan Glauber843c48f2012-08-27 10:55:18 +0200345 help
346 Select this option if you want to enable your system kernel to
347 handle system-calls from ELF binaries for 31 bit ESA. This option
348 (and some other stuff like libraries and such) is needed for
349 executing 31 bit applications. It is safe to say "Y".
350
351config SYSVIPC_COMPAT
352 def_bool y if COMPAT && SYSVIPC
353
354config KEYS_COMPAT
355 def_bool y if COMPAT && KEYS
356
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100358 def_bool y
359 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 ---help---
361 This enables support for systems with more than one CPU. If you have
362 a system with only one CPU, like most personal computers, say N. If
363 you have a system with more than one CPU, say Y.
364
Robert Graffham4a474152014-01-23 15:55:29 -0800365 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 machines, but will use only one CPU of a multiprocessor machine. If
367 you say Y here, the kernel will run on many, but not all,
Robert Graffham4a474152014-01-23 15:55:29 -0800368 uniprocessor machines. On a uniprocessor machine, the kernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 will run faster if you say N here.
370
Adrian Bunk03502fa2008-02-03 15:50:21 +0200371 See also the SMP-HOWTO available at
372 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
374 Even if you don't know what to do here, say Y.
375
376config NR_CPUS
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100377 int "Maximum number of CPUs (2-512)"
378 range 2 512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 depends on SMP
Heiko Carstens5a798592015-02-12 13:08:27 +0100380 default "64"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 help
382 This allows you to specify the maximum number of CPUs which this
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100383 kernel will support. The maximum supported value is 512 and the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 minimum value which makes sense is 2.
385
386 This is purely to save memory - each supported CPU adds
387 approximately sixteen kilobytes to the kernel image.
388
389config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100390 def_bool y
391 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 depends on SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 help
394 Say Y here to be able to turn CPUs off and on. CPUs
395 can be controlled through /sys/devices/system/cpu/cpu#.
396 Say N if you want to disable CPU hotplug.
397
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100398# Some NUMA nodes have memory ranges that span
399# other nodes. Even though a pfn is valid and
400# between a node's start and end pfns, it may not
401# reside on that node. See memmap_init_zone()
402# for details. <- They meant memory holes!
403config NODES_SPAN_OTHER_NODES
404 def_bool NUMA
405
406config NUMA
407 bool "NUMA support"
Heiko Carstensc095a942015-12-28 12:53:51 +0100408 depends on SMP && SCHED_TOPOLOGY
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100409 default n
410 help
411 Enable NUMA support
412
413 This option adds NUMA support to the kernel.
414
415 An operation mode can be selected by appending
416 numa=<method> to the kernel command line.
417
418 The default behaviour is identical to appending numa=plain to
419 the command line. This will create just one node with all
420 available memory and all CPUs in it.
421
422config NODES_SHIFT
423 int "Maximum NUMA nodes (as a power of 2)"
424 range 1 10
425 depends on NUMA
426 default "4"
427 help
428 Specify the maximum number of NUMA nodes available on the target
429 system. Increases memory reserved to accommodate various tables.
430
Michael Holzheuc29a7ba2014-03-06 18:47:21 +0100431menu "Select NUMA modes"
432 depends on NUMA
433
434config NUMA_EMU
435 bool "NUMA emulation"
436 default y
437 help
438 Numa emulation mode will split the available system memory into
439 equal chunks which then are distributed over the configured number
440 of nodes in a round-robin manner.
441
442 The number of fake nodes is limited by the number of available memory
443 chunks (i.e. memory size / fake size) and the number of supported
444 nodes in the kernel.
445
446 The CPUs are assigned to the nodes in a way that partially respects
447 the original machine topology (if supported by the machine).
448 Fair distribution of the CPUs is not guaranteed.
449
450config EMU_SIZE
451 hex "NUMA emulation memory chunk size"
452 default 0x10000000
453 range 0x400000 0x100000000
454 depends on NUMA_EMU
455 help
456 Select the default size by which the memory is chopped and then
457 assigned to emulated NUMA nodes.
458
459 This can be overridden by specifying
460
461 emu_size=<n>
462
463 on the kernel command line where also suffixes K, M, G, and T are
464 supported.
465
466endmenu
467
Heiko Carstens9236b4d2015-12-28 13:20:43 +0100468config SCHED_SMT
469 def_bool n
470
Heiko Carstens8d11e022010-10-29 16:50:37 +0200471config SCHED_MC
Heiko Carstens83a24e32011-12-27 11:27:09 +0100472 def_bool n
Heiko Carstens8d11e022010-10-29 16:50:37 +0200473
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200474config SCHED_BOOK
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100475 def_bool n
476
477config SCHED_TOPOLOGY
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100478 def_bool y
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100479 prompt "Topology scheduler support"
Heiko Carstens83a24e32011-12-27 11:27:09 +0100480 depends on SMP
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100481 select SCHED_SMT
Heiko Carstens83a24e32011-12-27 11:27:09 +0100482 select SCHED_MC
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100483 select SCHED_BOOK
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200484 help
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100485 Topology scheduler support improves the CPU scheduler's decision
486 making when dealing with machines that have multi-threading,
487 multiple cores or multiple books.
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200488
Jan Glauber843c48f2012-08-27 10:55:18 +0200489source kernel/Kconfig.preempt
490
Jan Glauber843c48f2012-08-27 10:55:18 +0200491source kernel/Kconfig.hz
492
493endmenu
494
495menu "Memory setup"
496
497config ARCH_SPARSEMEM_ENABLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100498 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200499 select SPARSEMEM_VMEMMAP_ENABLE
500 select SPARSEMEM_VMEMMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501
Jan Glauber843c48f2012-08-27 10:55:18 +0200502config ARCH_SPARSEMEM_DEFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100503 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400504
Jan Glauber843c48f2012-08-27 10:55:18 +0200505config ARCH_SELECT_MEMORY_MODEL
506 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200507
Jan Glauber843c48f2012-08-27 10:55:18 +0200508config ARCH_ENABLE_MEMORY_HOTPLUG
509 def_bool y if SPARSEMEM
Heiko Carstens05445162012-05-14 10:12:41 +0200510
Jan Glauber843c48f2012-08-27 10:55:18 +0200511config ARCH_ENABLE_MEMORY_HOTREMOVE
512 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200513
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100514config ARCH_ENABLE_SPLIT_PMD_PTLOCK
515 def_bool y
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100516
Jan Glauber843c48f2012-08-27 10:55:18 +0200517config FORCE_MAX_ZONEORDER
518 int
519 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200520
Jan Glauber843c48f2012-08-27 10:55:18 +0200521source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100524 def_bool y
525 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 help
527 This option enables the compiler option -mkernel-backchain if it
528 is available. If the option is available the compiler supports
529 the new stack layout which dramatically reduces the minimum stack
530 frame size. With an old compiler a non-leaf function needs a
531 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
532 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
533 and 24 byte on 64 bit.
534
535 Say Y if you are unsure.
536
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100538 def_bool y
539 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 help
541 This option enables the compiler option -mstack-guard and
542 -mstack-size if they are available. If the compiler supports them
543 it will emit additional code to each function prolog to trigger
544 an illegal operation if the kernel stack is about to overflow.
545
546 Say N if you are unsure.
547
548config STACK_GUARD
549 int "Size of the guard area (128-1024)"
550 range 128 1024
551 depends on CHECK_STACK
552 default "256"
553 help
554 This allows you to specify the size of the guard area at the lower
555 end of the kernel stack. If the kernel stack points into the guard
556 area on function entry an illegal operation is triggered. The size
557 needs to be a power of 2. Please keep in mind that the size of an
558 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
559 The minimum size for the stack guard should be 256 for 31 bit and
560 512 for 64 bit.
561
Jan Glauber2c190da2011-03-15 17:08:19 +0100562config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100563 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100564 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100566 This option enables the compiler option -mwarn-dynamicstack. If the
567 compiler supports this options generates warnings for functions
568 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
570 Say N if you are unsure.
571
Jan Glauber843c48f2012-08-27 10:55:18 +0200572endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200573
Jan Glauber843c48f2012-08-27 10:55:18 +0200574menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100577 def_tristate y
578 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800580 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200581 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582
583 To compile this driver as a module, choose M here: the
584 module will be called qdio.
585
586 If unsure, say Y.
587
Jan Glauberc8717a32012-11-29 14:38:46 +0100588menuconfig PCI
589 bool "PCI support"
Jan Glauberc8717a32012-11-29 14:38:46 +0100590 select PCI_MSI
Gerald Schaefer8128f23c2015-08-27 15:33:03 +0200591 select IOMMU_SUPPORT
Jan Glauberc8717a32012-11-29 14:38:46 +0100592 help
593 Enable PCI support.
594
595if PCI
596
597config PCI_NR_FUNCTIONS
598 int "Maximum number of PCI functions (1-4096)"
599 range 1 4096
600 default "64"
601 help
602 This allows you to specify the maximum number of PCI functions which
603 this kernel will support.
604
Martin Schwidefsky1f44a2252013-06-27 09:01:09 +0200605config PCI_NR_MSI
606 int "Maximum number of MSI interrupts (64-32768)"
607 range 64 32768
608 default "256"
609 help
610 This defines the number of virtual interrupts the kernel will
611 provide for MSI interrupts. If you configure your system to have
612 too few drivers will fail to allocate MSI interrupts for all
613 PCI devices.
614
Jan Glauberc8717a32012-11-29 14:38:46 +0100615source "drivers/pci/Kconfig"
Jan Glauberc8717a32012-11-29 14:38:46 +0100616
617endif # PCI
618
619config PCI_DOMAINS
620 def_bool PCI
621
622config HAS_IOMEM
623 def_bool PCI
624
625config IOMMU_HELPER
626 def_bool PCI
627
Jan Glauberc8717a32012-11-29 14:38:46 +0100628config NEED_SG_DMA_LENGTH
629 def_bool PCI
630
Jan Glauber91630032012-12-05 15:06:01 +0100631config NEED_DMA_MAP_STATE
632 def_bool PCI
633
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200634config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100635 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100636 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200637 help
638 This driver allows usage of CHSC subchannels. A CHSC subchannel
639 is usually present on LPAR only.
640 The driver creates a device /dev/chsc, which may be used to
641 obtain I/O configuration information about the machine and
642 to issue asynchronous chsc commands (DANGEROUS).
643 You will usually only want to use this interface on a special
644 LPAR designated for system management.
645
646 To compile this driver as a module, choose M here: the
647 module will be called chsc_sch.
648
649 If unsure, say N.
650
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200651config SCM_BUS
652 def_bool y
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200653 prompt "SCM bus driver"
654 help
655 Bus driver for Storage Class Memory.
656
Sebastian Otteadb86a2012-08-28 16:48:16 +0200657config EADM_SCH
658 def_tristate m
659 prompt "Support for EADM subchannels"
660 depends on SCM_BUS
661 help
662 This driver allows usage of EADM subchannels. EADM subchannels act
663 as a communication vehicle for SCM increments.
664
665 To compile this driver as a module, choose M here: the
666 module will be called eadm_sch.
667
Jan Glauber843c48f2012-08-27 10:55:18 +0200668endmenu
669
670menu "Dump support"
671
672config CRASH_DUMP
673 bool "kernel crash dumps"
Heiko Carstens5a798592015-02-12 13:08:27 +0100674 depends on SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200675 select KEXEC
676 help
677 Generate crash dump after being started by kexec.
678 Crash dump kernels are loaded in the main kernel with kexec-tools
679 into a specially reserved region and then later executed after
680 a crash by kdump/kexec.
Jan Glauber843c48f2012-08-27 10:55:18 +0200681 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
Michael Holzheubf28a592014-04-14 10:38:05 +0200682 This option also enables s390 zfcpdump.
683 See also <file:Documentation/s390/zfcpdump.txt>
Jan Glauber843c48f2012-08-27 10:55:18 +0200684
685endmenu
686
687menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689source "fs/Kconfig.binfmt"
690
Jan Glauber843c48f2012-08-27 10:55:18 +0200691config SECCOMP
692 def_bool y
693 prompt "Enable seccomp to safely compute untrusted bytecode"
694 depends on PROC_FS
695 help
696 This kernel feature is useful for number crunching applications
697 that may need to compute untrusted bytecode during their
698 execution. By using pipes or other transports made available to
699 the process as file descriptors supporting the read/write
700 syscalls, it's possible to isolate those applications in
701 their own address space using seccomp. Once seccomp is
702 enabled via /proc/<pid>/seccomp, it cannot be disabled
703 and the task is only allowed to execute a few safe syscalls
704 defined by each seccomp mode.
705
706 If unsure, say Y.
707
708endmenu
709
710menu "Power Management"
711
712config ARCH_HIBERNATION_POSSIBLE
Heiko Carstens5a798592015-02-12 13:08:27 +0100713 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200714
715source "kernel/power/Kconfig"
716
717endmenu
718
719source "net/Kconfig"
720
721config PCMCIA
722 def_bool n
723
724config CCW
725 def_bool y
726
727source "drivers/Kconfig"
728
729source "fs/Kconfig"
730
731source "arch/s390/Kconfig.debug"
732
733source "security/Kconfig"
734
735source "crypto/Kconfig"
736
737source "lib/Kconfig"
738
739menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100740
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100742 def_bool y
743 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744 help
745 Select this option, if you want to use PFAULT pseudo page fault
746 handling under VM. If running native or in LPAR, this option
747 has no effect. If your VM does not support PFAULT, PAGEEX
748 pseudo page fault handling will be used.
749 Note that VM 4.2 supports PFAULT but has a bug in its
750 implementation that causes some problems.
751 Everybody who wants to run Linux under VM != VM4.2 should select
752 this option.
753
754config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200755 bool "VM shared kernel support"
756 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 help
758 Select this option, if you want to share the text segment of the
759 Linux kernel between different VM guests. This reduces memory
760 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100761 Also if a kernel was IPL'ed from a shared segment the kexec system
762 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 You should only select this option if you know what you are
764 doing and want to exploit this feature.
765
766config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100767 def_tristate n
768 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 help
770 Select this option, if you want to enable the kernel interface
771 to reduce the memory size of the system. This is accomplished
772 by allocating pages of memory and put them "on hold". This only
773 makes sense for a system running under VM where the unused pages
774 will be reused by VM for other guest systems. The interface
775 allows an external monitor to balance memory of many systems.
776 Everybody who wants to run Linux under VM should select this
777 option.
778
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100780 def_bool y
781 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
783 help
784 Select this option to enable the special message interface to
785 the cooperative memory management.
786
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100788 def_bool n
789 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100790 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 help
792 This provides a kernel interface for creating and updating z/VM APPLDATA
793 monitor records. The monitor records are updated at certain time
794 intervals, once the timer is started.
795 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
796 i.e. enables or disables monitoring on the Linux side.
797 A custom interval value (in seconds) can be written to
798 /proc/appldata/interval.
799
800 Defaults are 60 seconds interval and timer off.
801 The /proc entries can also be read from, showing the current settings.
802
803config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100804 def_tristate m
805 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800806 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 help
808 This provides memory management related data to the Linux - VM Monitor
809 Stream, like paging/swapping rate, memory utilisation, etc.
810 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
811 APPLDATA monitor record, i.e. enables or disables monitoring this record
812 on the z/VM side.
813
814 Default is disabled.
815 The /proc entry can also be read from, showing the current settings.
816
817 This can also be compiled as a module, which will be called
818 appldata_mem.o.
819
820config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100821 def_tristate m
822 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 depends on APPLDATA_BASE
824 help
825 This provides OS related data to the Linux - VM Monitor Stream, like
826 CPU utilisation, etc.
827 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
828 APPLDATA monitor record, i.e. enables or disables monitoring this record
829 on the z/VM side.
830
831 Default is disabled.
832 This can also be compiled as a module, which will be called
833 appldata_os.o.
834
835config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100836 def_tristate m
837 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100838 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 help
840 This provides network related data to the Linux - VM Monitor Stream,
841 currently there is only a total sum of network I/O statistics, no
842 per-interface data.
843 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
844 APPLDATA monitor record, i.e. enables or disables monitoring this record
845 on the z/VM side.
846
847 Default is disabled.
848 This can also be compiled as a module, which will be called
849 appldata_net_sum.o.
850
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700851config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100852 def_bool y
853 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700854 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700855 help
856 This is a virtual file system intended to provide accounting
857 information in an s390 hypervisor environment.
858
Jan Glauber843c48f2012-08-27 10:55:18 +0200859source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200860
Carsten Ottefa587742008-03-25 18:47:44 +0100861config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100862 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700863 prompt "s390 support for virtio devices"
Chen Gang79b6f7f2013-07-23 16:26:08 +0800864 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200865 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100866 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200867 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100868 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200869 Enabling this option adds support for virtio based paravirtual device
870 drivers on s390.
871
Christian Borntraeger20766c02008-08-29 13:30:56 +0200872 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200873 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200874
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875endmenu