blob: aad23e3dff2c17b0bba5a7d2740ea47c21839480 [file] [log] [blame]
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
Ingo Molnar2b105ff2006-07-03 00:25:02 -07007config LOCKDEP_SUPPORT
Martin Schwidefsky61d48c22007-05-10 15:46:00 +02008 def_bool y
Ingo Molnar2b105ff2006-07-03 00:25:02 -07009
Heiko Carstens5bdc9b42006-07-03 00:24:41 -070010config STACKTRACE_SUPPORT
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020011 def_bool y
Heiko Carstens5bdc9b42006-07-03 00:24:41 -070012
Linus Torvalds1da177e2005-04-16 15:20:36 -070013config RWSEM_GENERIC_SPINLOCK
14 bool
15
16config RWSEM_XCHGADD_ALGORITHM
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020017 def_bool y
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
David Howellsf0d1b0b2006-12-08 02:37:49 -080019config ARCH_HAS_ILOG2_U32
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010020 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080021
22config ARCH_HAS_ILOG2_U64
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010023 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080024
Akinobu Mita7e33db42006-03-26 01:39:34 -080025config GENERIC_HWEIGHT
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020026 def_bool y
Akinobu Mita7e33db42006-03-26 01:39:34 -080027
Heiko Carstensc0007f12007-04-27 16:01:42 +020028config GENERIC_BUG
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010029 def_bool y if BUG
Heiko Carstensc0007f12007-04-27 16:01:42 +020030
Heiko Carstens52499f42010-02-26 22:37:44 +010031config GENERIC_BUG_RELATIVE_POINTERS
32 def_bool y
33
FUJITA Tomonorieca577e2010-10-25 16:10:50 +020034config ARCH_DMA_ADDR_T_64BIT
Heiko Carstens5a79859a2015-02-12 13:08:27 +010035 def_bool y
FUJITA Tomonorieca577e2010-10-25 16:10:50 +020036
Martin Schwidefskyb6b40c52008-02-05 16:50:42 +010037config GENERIC_LOCKBREAK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010038 def_bool y if SMP && PREEMPT
Martin Schwidefskyb6b40c52008-02-05 16:50:42 +010039
Carsten Otte402b0862008-03-25 18:47:10 +010040config PGSTE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010041 def_bool y if KVM
Carsten Otte402b0862008-03-25 18:47:10 +010042
Akinobu Mita6a11f752009-03-31 15:23:17 -070043config ARCH_SUPPORTS_DEBUG_PAGEALLOC
44 def_bool y
45
Jan Glauber843c48f2012-08-27 10:55:18 +020046config KEXEC
47 def_bool y
Dave Young2965faa2015-09-09 15:38:55 -070048 select KEXEC_CORE
Jan Glauber843c48f2012-08-27 10:55:18 +020049
50config AUDIT_ARCH
51 def_bool y
52
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -070053config NO_IOPORT_MAP
Jan Glauberc8717a32012-11-29 14:38:46 +010054 def_bool y
55
56config PCI_QUIRKS
57 def_bool n
58
Jan Willeke2a0a5b22014-09-22 16:39:06 +020059config ARCH_SUPPORTS_UPROBES
Heiko Carstens5a79859a2015-02-12 13:08:27 +010060 def_bool y
Jan Willeke2a0a5b22014-09-22 16:39:06 +020061
Heiko Carstens91d37212016-03-17 12:47:12 +010062config DEBUG_RODATA
63 def_bool y
64
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -080065config S390
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020066 def_bool y
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010067 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Heiko Carstens93bead42013-09-06 10:03:30 +020068 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
Dan Williams21266be2015-11-19 18:19:29 -080069 select ARCH_HAS_DEVMEM_IS_ALLOWED
Kees Cook2b68f6c2015-04-14 15:48:00 -070070 select ARCH_HAS_ELF_RANDOMIZE
Riku Voipio957e3fa2014-12-12 16:57:44 -080071 select ARCH_HAS_GCOV_PROFILE_ALL
Heiko Carstens47523c92014-12-22 10:07:04 +010072 select ARCH_HAS_SG_CHAIN
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010073 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Thomas Gleixner6beb0002009-11-09 15:21:34 +000074 select ARCH_INLINE_READ_LOCK
75 select ARCH_INLINE_READ_LOCK_BH
76 select ARCH_INLINE_READ_LOCK_IRQ
77 select ARCH_INLINE_READ_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010078 select ARCH_INLINE_READ_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000079 select ARCH_INLINE_READ_UNLOCK
80 select ARCH_INLINE_READ_UNLOCK_BH
81 select ARCH_INLINE_READ_UNLOCK_IRQ
82 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010083 select ARCH_INLINE_SPIN_LOCK
84 select ARCH_INLINE_SPIN_LOCK_BH
85 select ARCH_INLINE_SPIN_LOCK_IRQ
86 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
87 select ARCH_INLINE_SPIN_TRYLOCK
88 select ARCH_INLINE_SPIN_TRYLOCK_BH
89 select ARCH_INLINE_SPIN_UNLOCK
90 select ARCH_INLINE_SPIN_UNLOCK_BH
91 select ARCH_INLINE_SPIN_UNLOCK_IRQ
92 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
Thomas Gleixner6beb0002009-11-09 15:21:34 +000093 select ARCH_INLINE_WRITE_LOCK
94 select ARCH_INLINE_WRITE_LOCK_BH
95 select ARCH_INLINE_WRITE_LOCK_IRQ
96 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010097 select ARCH_INLINE_WRITE_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000098 select ARCH_INLINE_WRITE_UNLOCK
99 select ARCH_INLINE_WRITE_UNLOCK_BH
100 select ARCH_INLINE_WRITE_UNLOCK_IRQ
101 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100102 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
Christian Borntraeger36e7fda2014-08-05 09:57:51 +0200103 select ARCH_SUPPORTS_ATOMIC_RMW
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200104 select ARCH_SUPPORTS_NUMA_BALANCING
Christian Borntraeger295d8fa2015-10-29 01:16:04 +0100105 select ARCH_USE_BUILTIN_BSWAP
Heiko Carstensefc1d232013-09-05 13:26:17 +0200106 select ARCH_USE_CMPXCHG_LOCKREF
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200107 select ARCH_WANTS_PROT_NUMA_PROT_NONE
Will Deaconc1d7e012012-07-30 14:42:46 -0700108 select ARCH_WANT_IPC_PARSE_VERSION
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100109 select BUILDTIME_EXTABLE_SORT
110 select CLONE_BACKWARDS2
Heiko Carstens5d6a0162014-08-15 13:16:09 +0200111 select DYNAMIC_FTRACE if FUNCTION_TRACER
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100112 select GENERIC_CLOCKEVENTS
Hendrik Brueckner8f00b3e2015-02-19 12:22:02 +0100113 select GENERIC_CPU_AUTOPROBE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100114 select GENERIC_CPU_DEVICES if !SMP
Heiko Carstens746479c2013-09-18 11:45:36 +0200115 select GENERIC_FIND_FIRST_BIT
Thomas Gleixnere80e7812012-04-20 13:05:52 +0000116 select GENERIC_SMP_IDLE_THREAD
Martin Schwidefsky79c74ec2013-11-22 10:04:53 +0100117 select GENERIC_TIME_VSYSCALL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100118 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
AKASHI Takahiro7a017722014-02-25 18:16:24 +0900119 select HAVE_ARCH_AUDITSYSCALL
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200120 select HAVE_ARCH_EARLY_PFN_TO_NID
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100121 select HAVE_ARCH_JUMP_LABEL
Heiko Carstensc63cb462012-07-31 15:37:13 +0200122 select HAVE_ARCH_SECCOMP_FILTER
Martin Schwidefsky5614dd92015-04-22 14:47:42 +0200123 select HAVE_ARCH_SOFT_DIRTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100124 select HAVE_ARCH_TRACEHOOK
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100125 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
Heiko Carstens77a87f02015-04-21 16:50:08 +0200126 select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100127 select HAVE_CMPXCHG_DOUBLE
128 select HAVE_CMPXCHG_LOCAL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100129 select HAVE_DEBUG_KMEMLEAK
Christian Borntraegere82becfc2016-02-02 21:46:34 -0800130 select HAVE_DMA_API_DEBUG
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100131 select HAVE_DYNAMIC_FTRACE
132 select HAVE_DYNAMIC_FTRACE_WITH_REGS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100133 select HAVE_FTRACE_MCOUNT_RECORD
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100134 select HAVE_FUNCTION_GRAPH_TRACER
135 select HAVE_FUNCTION_TRACER
Heiko Carstens03b8c7b2014-03-02 13:09:47 +0100136 select HAVE_FUTEX_CMPXCHG if FUTEX
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100137 select HAVE_KERNEL_BZIP2
138 select HAVE_KERNEL_GZIP
Heiko Carstens8e2872c2013-07-18 15:18:24 +0200139 select HAVE_KERNEL_LZ4
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100140 select HAVE_KERNEL_LZMA
141 select HAVE_KERNEL_LZO
142 select HAVE_KERNEL_XZ
143 select HAVE_KPROBES
144 select HAVE_KRETPROBES
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100145 select HAVE_KVM
Jiri Slaby21042d42015-03-26 10:10:17 +0100146 select HAVE_LIVEPATCH
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100147 select HAVE_MEMBLOCK
148 select HAVE_MEMBLOCK_NODE_MAP
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100149 select HAVE_MEMBLOCK_PHYS_MAP
David Howells786d35d2012-09-28 14:31:03 +0930150 select HAVE_MOD_ARCH_SPECIFIC
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100151 select HAVE_OPROFILE
152 select HAVE_PERF_EVENTS
153 select HAVE_REGS_AND_STACK_ACCESS_API
154 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100155 select HAVE_VIRT_CPU_ACCOUNTING
David Howells786d35d2012-09-28 14:31:03 +0930156 select MODULES_USE_ELF_RELA
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100157 select NO_BOOTMEM
Al Viro7eddd992012-12-25 19:26:12 -0500158 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200159 select OLD_SIGSUSPEND3
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100160 select SYSCTL_EXCEPTION_TRACE
Josh Triplett05634162014-02-26 18:13:06 -0800161 select TTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100162 select VIRT_CPU_ACCOUNTING
Heiko Carstens93bead42013-09-06 10:03:30 +0200163 select VIRT_TO_BUS
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200166config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100167 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200168
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700169config PGTABLE_LEVELS
170 int
Heiko Carstensc095a942015-12-28 12:53:51 +0100171 default 4
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173source "init/Kconfig"
174
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700175source "kernel/Kconfig.freezer"
176
Jiri Slaby21042d42015-03-26 10:10:17 +0100177source "kernel/livepatch/Kconfig"
178
Jan Glauber843c48f2012-08-27 10:55:18 +0200179menu "Processor type and features"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180
Jan Glauber843c48f2012-08-27 10:55:18 +0200181config HAVE_MARCH_Z900_FEATURES
182 def_bool n
183
184config HAVE_MARCH_Z990_FEATURES
185 def_bool n
186 select HAVE_MARCH_Z900_FEATURES
187
188config HAVE_MARCH_Z9_109_FEATURES
189 def_bool n
190 select HAVE_MARCH_Z990_FEATURES
191
192config HAVE_MARCH_Z10_FEATURES
193 def_bool n
194 select HAVE_MARCH_Z9_109_FEATURES
195
196config HAVE_MARCH_Z196_FEATURES
197 def_bool n
198 select HAVE_MARCH_Z10_FEATURES
199
Heiko Carstens991c15052012-11-13 10:26:37 +0200200config HAVE_MARCH_ZEC12_FEATURES
201 def_bool n
202 select HAVE_MARCH_Z196_FEATURES
203
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100204config HAVE_MARCH_Z13_FEATURES
205 def_bool n
206 select HAVE_MARCH_ZEC12_FEATURES
207
Jan Glauber843c48f2012-08-27 10:55:18 +0200208choice
209 prompt "Processor type"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100210 default MARCH_Z900
Jan Glauber843c48f2012-08-27 10:55:18 +0200211
212config MARCH_Z900
213 bool "IBM zSeries model z800 and z900"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100214 select HAVE_MARCH_Z900_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200215 help
216 Select this to enable optimizations for model z800/z900 (2064 and
217 2066 series). This will enable some optimizations that are not
218 available on older ESA/390 (31 Bit) only CPUs.
219
220config MARCH_Z990
221 bool "IBM zSeries model z890 and z990"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100222 select HAVE_MARCH_Z990_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200223 help
224 Select this to enable optimizations for model z890/z990 (2084 and
225 2086 series). The kernel will be slightly faster but will not work
226 on older machines.
227
228config MARCH_Z9_109
229 bool "IBM System z9"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100230 select HAVE_MARCH_Z9_109_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200231 help
232 Select this to enable optimizations for IBM System z9 (2094 and
233 2096 series). The kernel will be slightly faster but will not work
234 on older machines.
235
236config MARCH_Z10
237 bool "IBM System z10"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100238 select HAVE_MARCH_Z10_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200239 help
240 Select this to enable optimizations for IBM System z10 (2097 and
241 2098 series). The kernel will be slightly faster but will not work
242 on older machines.
243
244config MARCH_Z196
245 bool "IBM zEnterprise 114 and 196"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100246 select HAVE_MARCH_Z196_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200247 help
248 Select this to enable optimizations for IBM zEnterprise 114 and 196
249 (2818 and 2817 series). The kernel will be slightly faster but will
250 not work on older machines.
251
Heiko Carstens991c15052012-11-13 10:26:37 +0200252config MARCH_ZEC12
Heiko Carstens59471222013-07-24 10:35:33 +0200253 bool "IBM zBC12 and zEC12"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100254 select HAVE_MARCH_ZEC12_FEATURES
Heiko Carstens991c15052012-11-13 10:26:37 +0200255 help
Heiko Carstens59471222013-07-24 10:35:33 +0200256 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
257 2827 series). The kernel will be slightly faster but will not work on
258 older machines.
Heiko Carstens991c15052012-11-13 10:26:37 +0200259
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100260config MARCH_Z13
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100261 bool "IBM z13s and z13"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100262 select HAVE_MARCH_Z13_FEATURES
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100263 help
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100264 Select this to enable optimizations for IBM z13s and z13 (2965 and
265 2964 series). The kernel will be slightly faster but will not work on
266 older machines.
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100267
Jan Glauber843c48f2012-08-27 10:55:18 +0200268endchoice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
Heiko Carstens1db9e052013-10-30 12:12:50 +0100270config MARCH_Z900_TUNE
271 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
272
273config MARCH_Z990_TUNE
274 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
275
276config MARCH_Z9_109_TUNE
277 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
278
279config MARCH_Z10_TUNE
280 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
281
282config MARCH_Z196_TUNE
283 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
284
285config MARCH_ZEC12_TUNE
286 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
287
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100288config MARCH_Z13_TUNE
289 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
290
Heiko Carstens1db9e052013-10-30 12:12:50 +0100291choice
292 prompt "Tune code generation"
293 default TUNE_DEFAULT
294 help
295 Cause the compiler to tune (-mtune) the generated code for a machine.
296 This will make the code run faster on the selected machine but
297 somewhat slower on other machines.
298 This option only changes how the compiler emits instructions, not the
299 selection of instructions itself, so the resulting kernel will run on
300 all other machines.
301
302config TUNE_DEFAULT
303 bool "Default"
304 help
305 Tune the generated code for the target processor for which the kernel
306 will be compiled.
307
Heiko Carstens1db9e052013-10-30 12:12:50 +0100308config TUNE_Z900
309 bool "IBM zSeries model z800 and z900"
310
311config TUNE_Z990
312 bool "IBM zSeries model z890 and z990"
313
314config TUNE_Z9_109
315 bool "IBM System z9"
316
317config TUNE_Z10
318 bool "IBM System z10"
319
320config TUNE_Z196
321 bool "IBM zEnterprise 114 and 196"
322
323config TUNE_ZEC12
324 bool "IBM zBC12 and zEC12"
325
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100326config TUNE_Z13
327 bool "IBM z13"
328
Heiko Carstens1db9e052013-10-30 12:12:50 +0100329endchoice
330
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800331config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100332 def_bool y
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200333
Jan Glauber843c48f2012-08-27 10:55:18 +0200334config COMPAT
335 def_bool y
336 prompt "Kernel support for 31 bit emulation"
Jan Glauber843c48f2012-08-27 10:55:18 +0200337 select COMPAT_BINFMT_ELF if BINFMT_ELF
338 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro7eddd992012-12-25 19:26:12 -0500339 select COMPAT_OLD_SIGACTION
Iulia Manda28138932015-04-15 16:16:41 -0700340 depends on MULTIUSER
Jan Glauber843c48f2012-08-27 10:55:18 +0200341 help
342 Select this option if you want to enable your system kernel to
343 handle system-calls from ELF binaries for 31 bit ESA. This option
344 (and some other stuff like libraries and such) is needed for
345 executing 31 bit applications. It is safe to say "Y".
346
347config SYSVIPC_COMPAT
348 def_bool y if COMPAT && SYSVIPC
349
350config KEYS_COMPAT
351 def_bool y if COMPAT && KEYS
352
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100354 def_bool y
355 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 ---help---
357 This enables support for systems with more than one CPU. If you have
358 a system with only one CPU, like most personal computers, say N. If
359 you have a system with more than one CPU, say Y.
360
Robert Graffham4a474152014-01-23 15:55:29 -0800361 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 machines, but will use only one CPU of a multiprocessor machine. If
363 you say Y here, the kernel will run on many, but not all,
Robert Graffham4a474152014-01-23 15:55:29 -0800364 uniprocessor machines. On a uniprocessor machine, the kernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 will run faster if you say N here.
366
Adrian Bunk03502fa2008-02-03 15:50:21 +0200367 See also the SMP-HOWTO available at
368 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 Even if you don't know what to do here, say Y.
371
372config NR_CPUS
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100373 int "Maximum number of CPUs (2-512)"
374 range 2 512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 depends on SMP
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100376 default "64"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 help
378 This allows you to specify the maximum number of CPUs which this
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100379 kernel will support. The maximum supported value is 512 and the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 minimum value which makes sense is 2.
381
382 This is purely to save memory - each supported CPU adds
383 approximately sixteen kilobytes to the kernel image.
384
385config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100386 def_bool y
387 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 depends on SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 help
390 Say Y here to be able to turn CPUs off and on. CPUs
391 can be controlled through /sys/devices/system/cpu/cpu#.
392 Say N if you want to disable CPU hotplug.
393
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100394# Some NUMA nodes have memory ranges that span
395# other nodes. Even though a pfn is valid and
396# between a node's start and end pfns, it may not
397# reside on that node. See memmap_init_zone()
398# for details. <- They meant memory holes!
399config NODES_SPAN_OTHER_NODES
400 def_bool NUMA
401
402config NUMA
403 bool "NUMA support"
Heiko Carstensc095a942015-12-28 12:53:51 +0100404 depends on SMP && SCHED_TOPOLOGY
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100405 default n
406 help
407 Enable NUMA support
408
409 This option adds NUMA support to the kernel.
410
411 An operation mode can be selected by appending
412 numa=<method> to the kernel command line.
413
414 The default behaviour is identical to appending numa=plain to
415 the command line. This will create just one node with all
416 available memory and all CPUs in it.
417
418config NODES_SHIFT
419 int "Maximum NUMA nodes (as a power of 2)"
420 range 1 10
421 depends on NUMA
422 default "4"
423 help
424 Specify the maximum number of NUMA nodes available on the target
425 system. Increases memory reserved to accommodate various tables.
426
Michael Holzheuc29a7ba2014-03-06 18:47:21 +0100427menu "Select NUMA modes"
428 depends on NUMA
429
430config NUMA_EMU
431 bool "NUMA emulation"
432 default y
433 help
434 Numa emulation mode will split the available system memory into
435 equal chunks which then are distributed over the configured number
436 of nodes in a round-robin manner.
437
438 The number of fake nodes is limited by the number of available memory
439 chunks (i.e. memory size / fake size) and the number of supported
440 nodes in the kernel.
441
442 The CPUs are assigned to the nodes in a way that partially respects
443 the original machine topology (if supported by the machine).
444 Fair distribution of the CPUs is not guaranteed.
445
446config EMU_SIZE
447 hex "NUMA emulation memory chunk size"
448 default 0x10000000
449 range 0x400000 0x100000000
450 depends on NUMA_EMU
451 help
452 Select the default size by which the memory is chopped and then
453 assigned to emulated NUMA nodes.
454
455 This can be overridden by specifying
456
457 emu_size=<n>
458
459 on the kernel command line where also suffixes K, M, G, and T are
460 supported.
461
462endmenu
463
Heiko Carstens9236b4d2015-12-28 13:20:43 +0100464config SCHED_SMT
465 def_bool n
466
Heiko Carstens8d11e022010-10-29 16:50:37 +0200467config SCHED_MC
Heiko Carstens83a24e32011-12-27 11:27:09 +0100468 def_bool n
Heiko Carstens8d11e022010-10-29 16:50:37 +0200469
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200470config SCHED_BOOK
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100471 def_bool n
472
473config SCHED_TOPOLOGY
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100474 def_bool y
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100475 prompt "Topology scheduler support"
Heiko Carstens83a24e32011-12-27 11:27:09 +0100476 depends on SMP
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100477 select SCHED_SMT
Heiko Carstens83a24e32011-12-27 11:27:09 +0100478 select SCHED_MC
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100479 select SCHED_BOOK
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200480 help
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100481 Topology scheduler support improves the CPU scheduler's decision
482 making when dealing with machines that have multi-threading,
483 multiple cores or multiple books.
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200484
Jan Glauber843c48f2012-08-27 10:55:18 +0200485source kernel/Kconfig.preempt
486
Jan Glauber843c48f2012-08-27 10:55:18 +0200487source kernel/Kconfig.hz
488
489endmenu
490
491menu "Memory setup"
492
493config ARCH_SPARSEMEM_ENABLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100494 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200495 select SPARSEMEM_VMEMMAP_ENABLE
496 select SPARSEMEM_VMEMMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
Jan Glauber843c48f2012-08-27 10:55:18 +0200498config ARCH_SPARSEMEM_DEFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100499 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400500
Jan Glauber843c48f2012-08-27 10:55:18 +0200501config ARCH_SELECT_MEMORY_MODEL
502 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200503
Jan Glauber843c48f2012-08-27 10:55:18 +0200504config ARCH_ENABLE_MEMORY_HOTPLUG
505 def_bool y if SPARSEMEM
Heiko Carstens05445162012-05-14 10:12:41 +0200506
Jan Glauber843c48f2012-08-27 10:55:18 +0200507config ARCH_ENABLE_MEMORY_HOTREMOVE
508 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200509
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100510config ARCH_ENABLE_SPLIT_PMD_PTLOCK
511 def_bool y
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100512
Jan Glauber843c48f2012-08-27 10:55:18 +0200513config FORCE_MAX_ZONEORDER
514 int
515 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200516
Jan Glauber843c48f2012-08-27 10:55:18 +0200517source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
519config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100520 def_bool y
521 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522 help
523 This option enables the compiler option -mkernel-backchain if it
524 is available. If the option is available the compiler supports
525 the new stack layout which dramatically reduces the minimum stack
526 frame size. With an old compiler a non-leaf function needs a
527 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
528 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
529 and 24 byte on 64 bit.
530
531 Say Y if you are unsure.
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100534 def_bool y
535 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 help
537 This option enables the compiler option -mstack-guard and
538 -mstack-size if they are available. If the compiler supports them
539 it will emit additional code to each function prolog to trigger
540 an illegal operation if the kernel stack is about to overflow.
541
542 Say N if you are unsure.
543
544config STACK_GUARD
545 int "Size of the guard area (128-1024)"
546 range 128 1024
547 depends on CHECK_STACK
548 default "256"
549 help
550 This allows you to specify the size of the guard area at the lower
551 end of the kernel stack. If the kernel stack points into the guard
552 area on function entry an illegal operation is triggered. The size
553 needs to be a power of 2. Please keep in mind that the size of an
554 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
555 The minimum size for the stack guard should be 256 for 31 bit and
556 512 for 64 bit.
557
Jan Glauber2c190da2011-03-15 17:08:19 +0100558config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100559 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100560 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100562 This option enables the compiler option -mwarn-dynamicstack. If the
563 compiler supports this options generates warnings for functions
564 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
566 Say N if you are unsure.
567
Jan Glauber843c48f2012-08-27 10:55:18 +0200568endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200569
Jan Glauber843c48f2012-08-27 10:55:18 +0200570menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100573 def_tristate y
574 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800576 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200577 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
579 To compile this driver as a module, choose M here: the
580 module will be called qdio.
581
582 If unsure, say Y.
583
Jan Glauberc8717a32012-11-29 14:38:46 +0100584menuconfig PCI
585 bool "PCI support"
Jan Glauberc8717a32012-11-29 14:38:46 +0100586 select PCI_MSI
Gerald Schaefer8128f23c2015-08-27 15:33:03 +0200587 select IOMMU_SUPPORT
Jan Glauberc8717a32012-11-29 14:38:46 +0100588 help
589 Enable PCI support.
590
591if PCI
592
593config PCI_NR_FUNCTIONS
594 int "Maximum number of PCI functions (1-4096)"
595 range 1 4096
596 default "64"
597 help
598 This allows you to specify the maximum number of PCI functions which
599 this kernel will support.
600
Martin Schwidefsky1f44a2252013-06-27 09:01:09 +0200601config PCI_NR_MSI
602 int "Maximum number of MSI interrupts (64-32768)"
603 range 64 32768
604 default "256"
605 help
606 This defines the number of virtual interrupts the kernel will
607 provide for MSI interrupts. If you configure your system to have
608 too few drivers will fail to allocate MSI interrupts for all
609 PCI devices.
610
Jan Glauberc8717a32012-11-29 14:38:46 +0100611source "drivers/pci/Kconfig"
Jan Glauberc8717a32012-11-29 14:38:46 +0100612
613endif # PCI
614
615config PCI_DOMAINS
616 def_bool PCI
617
618config HAS_IOMEM
619 def_bool PCI
620
621config IOMMU_HELPER
622 def_bool PCI
623
Jan Glauberc8717a32012-11-29 14:38:46 +0100624config NEED_SG_DMA_LENGTH
625 def_bool PCI
626
Jan Glauber91630032012-12-05 15:06:01 +0100627config NEED_DMA_MAP_STATE
628 def_bool PCI
629
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200630config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100631 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100632 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200633 help
634 This driver allows usage of CHSC subchannels. A CHSC subchannel
635 is usually present on LPAR only.
636 The driver creates a device /dev/chsc, which may be used to
637 obtain I/O configuration information about the machine and
638 to issue asynchronous chsc commands (DANGEROUS).
639 You will usually only want to use this interface on a special
640 LPAR designated for system management.
641
642 To compile this driver as a module, choose M here: the
643 module will be called chsc_sch.
644
645 If unsure, say N.
646
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200647config SCM_BUS
648 def_bool y
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200649 prompt "SCM bus driver"
650 help
651 Bus driver for Storage Class Memory.
652
Sebastian Otteadb86a2012-08-28 16:48:16 +0200653config EADM_SCH
654 def_tristate m
655 prompt "Support for EADM subchannels"
656 depends on SCM_BUS
657 help
658 This driver allows usage of EADM subchannels. EADM subchannels act
659 as a communication vehicle for SCM increments.
660
661 To compile this driver as a module, choose M here: the
662 module will be called eadm_sch.
663
Jan Glauber843c48f2012-08-27 10:55:18 +0200664endmenu
665
666menu "Dump support"
667
668config CRASH_DUMP
669 bool "kernel crash dumps"
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100670 depends on SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200671 select KEXEC
672 help
673 Generate crash dump after being started by kexec.
674 Crash dump kernels are loaded in the main kernel with kexec-tools
675 into a specially reserved region and then later executed after
676 a crash by kdump/kexec.
Jan Glauber843c48f2012-08-27 10:55:18 +0200677 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
Michael Holzheubf28a592014-04-14 10:38:05 +0200678 This option also enables s390 zfcpdump.
679 See also <file:Documentation/s390/zfcpdump.txt>
Jan Glauber843c48f2012-08-27 10:55:18 +0200680
681endmenu
682
683menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685source "fs/Kconfig.binfmt"
686
Jan Glauber843c48f2012-08-27 10:55:18 +0200687config SECCOMP
688 def_bool y
689 prompt "Enable seccomp to safely compute untrusted bytecode"
690 depends on PROC_FS
691 help
692 This kernel feature is useful for number crunching applications
693 that may need to compute untrusted bytecode during their
694 execution. By using pipes or other transports made available to
695 the process as file descriptors supporting the read/write
696 syscalls, it's possible to isolate those applications in
697 their own address space using seccomp. Once seccomp is
698 enabled via /proc/<pid>/seccomp, it cannot be disabled
699 and the task is only allowed to execute a few safe syscalls
700 defined by each seccomp mode.
701
702 If unsure, say Y.
703
704endmenu
705
706menu "Power Management"
707
708config ARCH_HIBERNATION_POSSIBLE
Heiko Carstens5a79859a2015-02-12 13:08:27 +0100709 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200710
711source "kernel/power/Kconfig"
712
713endmenu
714
715source "net/Kconfig"
716
717config PCMCIA
718 def_bool n
719
720config CCW
721 def_bool y
722
723source "drivers/Kconfig"
724
725source "fs/Kconfig"
726
727source "arch/s390/Kconfig.debug"
728
729source "security/Kconfig"
730
731source "crypto/Kconfig"
732
733source "lib/Kconfig"
734
735menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100736
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100738 def_bool y
739 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 help
741 Select this option, if you want to use PFAULT pseudo page fault
742 handling under VM. If running native or in LPAR, this option
743 has no effect. If your VM does not support PFAULT, PAGEEX
744 pseudo page fault handling will be used.
745 Note that VM 4.2 supports PFAULT but has a bug in its
746 implementation that causes some problems.
747 Everybody who wants to run Linux under VM != VM4.2 should select
748 this option.
749
750config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200751 bool "VM shared kernel support"
752 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753 help
754 Select this option, if you want to share the text segment of the
755 Linux kernel between different VM guests. This reduces memory
756 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100757 Also if a kernel was IPL'ed from a shared segment the kexec system
758 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 You should only select this option if you know what you are
760 doing and want to exploit this feature.
761
762config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100763 def_tristate n
764 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 help
766 Select this option, if you want to enable the kernel interface
767 to reduce the memory size of the system. This is accomplished
768 by allocating pages of memory and put them "on hold". This only
769 makes sense for a system running under VM where the unused pages
770 will be reused by VM for other guest systems. The interface
771 allows an external monitor to balance memory of many systems.
772 Everybody who wants to run Linux under VM should select this
773 option.
774
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100776 def_bool y
777 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
779 help
780 Select this option to enable the special message interface to
781 the cooperative memory management.
782
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100784 def_bool n
785 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100786 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 help
788 This provides a kernel interface for creating and updating z/VM APPLDATA
789 monitor records. The monitor records are updated at certain time
790 intervals, once the timer is started.
791 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
792 i.e. enables or disables monitoring on the Linux side.
793 A custom interval value (in seconds) can be written to
794 /proc/appldata/interval.
795
796 Defaults are 60 seconds interval and timer off.
797 The /proc entries can also be read from, showing the current settings.
798
799config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100800 def_tristate m
801 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800802 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 help
804 This provides memory management related data to the Linux - VM Monitor
805 Stream, like paging/swapping rate, memory utilisation, etc.
806 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
807 APPLDATA monitor record, i.e. enables or disables monitoring this record
808 on the z/VM side.
809
810 Default is disabled.
811 The /proc entry can also be read from, showing the current settings.
812
813 This can also be compiled as a module, which will be called
814 appldata_mem.o.
815
816config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100817 def_tristate m
818 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 depends on APPLDATA_BASE
820 help
821 This provides OS related data to the Linux - VM Monitor Stream, like
822 CPU utilisation, etc.
823 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
824 APPLDATA monitor record, i.e. enables or disables monitoring this record
825 on the z/VM side.
826
827 Default is disabled.
828 This can also be compiled as a module, which will be called
829 appldata_os.o.
830
831config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100832 def_tristate m
833 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100834 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 help
836 This provides network related data to the Linux - VM Monitor Stream,
837 currently there is only a total sum of network I/O statistics, no
838 per-interface data.
839 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
840 APPLDATA monitor record, i.e. enables or disables monitoring this record
841 on the z/VM side.
842
843 Default is disabled.
844 This can also be compiled as a module, which will be called
845 appldata_net_sum.o.
846
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700847config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100848 def_bool y
849 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700850 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700851 help
852 This is a virtual file system intended to provide accounting
853 information in an s390 hypervisor environment.
854
Jan Glauber843c48f2012-08-27 10:55:18 +0200855source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200856
Carsten Ottefa587742008-03-25 18:47:44 +0100857config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100858 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700859 prompt "s390 support for virtio devices"
Chen Gang79b6f7f2013-07-23 16:26:08 +0800860 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200861 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100862 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200863 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100864 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200865 Enabling this option adds support for virtio based paravirtual device
866 drivers on s390.
867
Christian Borntraeger20766c02008-08-29 13:30:56 +0200868 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200869 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871endmenu