blob: bf24ab1889215abed3b8759dae2d45177ab960ab [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
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
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200110 select ARCH_WANTS_PROT_NUMA_PROT_NONE
Will Deaconc1d7e012012-07-30 14:42:46 -0700111 select ARCH_WANT_IPC_PARSE_VERSION
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100112 select BUILDTIME_EXTABLE_SORT
113 select CLONE_BACKWARDS2
Heiko Carstens5d6a0162014-08-15 13:16:09 +0200114 select DYNAMIC_FTRACE if FUNCTION_TRACER
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100115 select GENERIC_CLOCKEVENTS
Hendrik Brueckner8f00b3e2015-02-19 12:22:02 +0100116 select GENERIC_CPU_AUTOPROBE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100117 select GENERIC_CPU_DEVICES if !SMP
Heiko Carstens746479c2013-09-18 11:45:36 +0200118 select GENERIC_FIND_FIRST_BIT
Thomas Gleixnere80e7812012-04-20 13:05:52 +0000119 select GENERIC_SMP_IDLE_THREAD
Martin Schwidefsky79c74ec2013-11-22 10:04:53 +0100120 select GENERIC_TIME_VSYSCALL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100121 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
AKASHI Takahiro7a017722014-02-25 18:16:24 +0900122 select HAVE_ARCH_AUDITSYSCALL
Philipp Hachtmanna763bc82015-05-08 17:40:44 +0200123 select HAVE_ARCH_EARLY_PFN_TO_NID
Heiko Carstens5a798592015-02-12 13:08:27 +0100124 select HAVE_ARCH_JUMP_LABEL
Heiko Carstensc63cb462012-07-31 15:37:13 +0200125 select HAVE_ARCH_SECCOMP_FILTER
Martin Schwidefsky5614dd92015-04-22 14:47:42 +0200126 select HAVE_ARCH_SOFT_DIRTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100127 select HAVE_ARCH_TRACEHOOK
Heiko Carstens5a798592015-02-12 13:08:27 +0100128 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
Heiko Carstens77a87f02015-04-21 16:50:08 +0200129 select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100130 select HAVE_CMPXCHG_DOUBLE
131 select HAVE_CMPXCHG_LOCAL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100132 select HAVE_DEBUG_KMEMLEAK
Christian Borntraegere82becfc2016-02-02 21:46:34 -0800133 select HAVE_DMA_API_DEBUG
Heiko Carstens5a798592015-02-12 13:08:27 +0100134 select HAVE_DYNAMIC_FTRACE
135 select HAVE_DYNAMIC_FTRACE_WITH_REGS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100136 select HAVE_FTRACE_MCOUNT_RECORD
Heiko Carstens5a798592015-02-12 13:08:27 +0100137 select HAVE_FUNCTION_GRAPH_TRACER
138 select HAVE_FUNCTION_TRACER
Heiko Carstens03b8c7b2014-03-02 13:09:47 +0100139 select HAVE_FUTEX_CMPXCHG if FUTEX
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100140 select HAVE_KERNEL_BZIP2
141 select HAVE_KERNEL_GZIP
Heiko Carstens8e2872c2013-07-18 15:18:24 +0200142 select HAVE_KERNEL_LZ4
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100143 select HAVE_KERNEL_LZMA
144 select HAVE_KERNEL_LZO
145 select HAVE_KERNEL_XZ
146 select HAVE_KPROBES
147 select HAVE_KRETPROBES
Heiko Carstens5a798592015-02-12 13:08:27 +0100148 select HAVE_KVM
Jiri Slaby21042d42015-03-26 10:10:17 +0100149 select HAVE_LIVEPATCH
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100150 select HAVE_MEMBLOCK
151 select HAVE_MEMBLOCK_NODE_MAP
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100152 select HAVE_MEMBLOCK_PHYS_MAP
David Howells786d35d2012-09-28 14:31:03 +0930153 select HAVE_MOD_ARCH_SPECIFIC
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100154 select HAVE_OPROFILE
155 select HAVE_PERF_EVENTS
156 select HAVE_REGS_AND_STACK_ACCESS_API
157 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100158 select HAVE_VIRT_CPU_ACCOUNTING
David Howells786d35d2012-09-28 14:31:03 +0930159 select MODULES_USE_ELF_RELA
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100160 select NO_BOOTMEM
Al Viro7eddd992012-12-25 19:26:12 -0500161 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200162 select OLD_SIGSUSPEND3
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100163 select SYSCTL_EXCEPTION_TRACE
Josh Triplett05634162014-02-26 18:13:06 -0800164 select TTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100165 select VIRT_CPU_ACCOUNTING
Heiko Carstens93bead42013-09-06 10:03:30 +0200166 select VIRT_TO_BUS
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100167
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200169config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100170 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200171
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700172config PGTABLE_LEVELS
173 int
Heiko Carstensc095a942015-12-28 12:53:51 +0100174 default 4
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700175
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176source "init/Kconfig"
177
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700178source "kernel/Kconfig.freezer"
179
Jiri Slaby21042d42015-03-26 10:10:17 +0100180source "kernel/livepatch/Kconfig"
181
Jan Glauber843c48f2012-08-27 10:55:18 +0200182menu "Processor type and features"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Jan Glauber843c48f2012-08-27 10:55:18 +0200184config HAVE_MARCH_Z900_FEATURES
185 def_bool n
186
187config HAVE_MARCH_Z990_FEATURES
188 def_bool n
189 select HAVE_MARCH_Z900_FEATURES
190
191config HAVE_MARCH_Z9_109_FEATURES
192 def_bool n
193 select HAVE_MARCH_Z990_FEATURES
194
195config HAVE_MARCH_Z10_FEATURES
196 def_bool n
197 select HAVE_MARCH_Z9_109_FEATURES
198
199config HAVE_MARCH_Z196_FEATURES
200 def_bool n
201 select HAVE_MARCH_Z10_FEATURES
202
Heiko Carstens991c15052012-11-13 10:26:37 +0200203config HAVE_MARCH_ZEC12_FEATURES
204 def_bool n
205 select HAVE_MARCH_Z196_FEATURES
206
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100207config HAVE_MARCH_Z13_FEATURES
208 def_bool n
209 select HAVE_MARCH_ZEC12_FEATURES
210
Jan Glauber843c48f2012-08-27 10:55:18 +0200211choice
212 prompt "Processor type"
Heiko Carstens5a798592015-02-12 13:08:27 +0100213 default MARCH_Z900
Jan Glauber843c48f2012-08-27 10:55:18 +0200214
215config MARCH_Z900
216 bool "IBM zSeries model z800 and z900"
Heiko Carstens5a798592015-02-12 13:08:27 +0100217 select HAVE_MARCH_Z900_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200218 help
219 Select this to enable optimizations for model z800/z900 (2064 and
220 2066 series). This will enable some optimizations that are not
221 available on older ESA/390 (31 Bit) only CPUs.
222
223config MARCH_Z990
224 bool "IBM zSeries model z890 and z990"
Heiko Carstens5a798592015-02-12 13:08:27 +0100225 select HAVE_MARCH_Z990_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200226 help
227 Select this to enable optimizations for model z890/z990 (2084 and
228 2086 series). The kernel will be slightly faster but will not work
229 on older machines.
230
231config MARCH_Z9_109
232 bool "IBM System z9"
Heiko Carstens5a798592015-02-12 13:08:27 +0100233 select HAVE_MARCH_Z9_109_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200234 help
235 Select this to enable optimizations for IBM System z9 (2094 and
236 2096 series). The kernel will be slightly faster but will not work
237 on older machines.
238
239config MARCH_Z10
240 bool "IBM System z10"
Heiko Carstens5a798592015-02-12 13:08:27 +0100241 select HAVE_MARCH_Z10_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200242 help
243 Select this to enable optimizations for IBM System z10 (2097 and
244 2098 series). The kernel will be slightly faster but will not work
245 on older machines.
246
247config MARCH_Z196
248 bool "IBM zEnterprise 114 and 196"
Heiko Carstens5a798592015-02-12 13:08:27 +0100249 select HAVE_MARCH_Z196_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200250 help
251 Select this to enable optimizations for IBM zEnterprise 114 and 196
252 (2818 and 2817 series). The kernel will be slightly faster but will
253 not work on older machines.
254
Heiko Carstens991c15052012-11-13 10:26:37 +0200255config MARCH_ZEC12
Heiko Carstens59471222013-07-24 10:35:33 +0200256 bool "IBM zBC12 and zEC12"
Heiko Carstens5a798592015-02-12 13:08:27 +0100257 select HAVE_MARCH_ZEC12_FEATURES
Heiko Carstens991c15052012-11-13 10:26:37 +0200258 help
Heiko Carstens59471222013-07-24 10:35:33 +0200259 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
260 2827 series). The kernel will be slightly faster but will not work on
261 older machines.
Heiko Carstens991c15052012-11-13 10:26:37 +0200262
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100263config MARCH_Z13
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100264 bool "IBM z13s and z13"
Heiko Carstens5a798592015-02-12 13:08:27 +0100265 select HAVE_MARCH_Z13_FEATURES
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100266 help
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100267 Select this to enable optimizations for IBM z13s and z13 (2965 and
268 2964 series). The kernel will be slightly faster but will not work on
269 older machines.
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100270
Jan Glauber843c48f2012-08-27 10:55:18 +0200271endchoice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Heiko Carstens1db9e052013-10-30 12:12:50 +0100273config MARCH_Z900_TUNE
274 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
275
276config MARCH_Z990_TUNE
277 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
278
279config MARCH_Z9_109_TUNE
280 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
281
282config MARCH_Z10_TUNE
283 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
284
285config MARCH_Z196_TUNE
286 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
287
288config MARCH_ZEC12_TUNE
289 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
290
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100291config MARCH_Z13_TUNE
292 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
293
Heiko Carstens1db9e052013-10-30 12:12:50 +0100294choice
295 prompt "Tune code generation"
296 default TUNE_DEFAULT
297 help
298 Cause the compiler to tune (-mtune) the generated code for a machine.
299 This will make the code run faster on the selected machine but
300 somewhat slower on other machines.
301 This option only changes how the compiler emits instructions, not the
302 selection of instructions itself, so the resulting kernel will run on
303 all other machines.
304
305config TUNE_DEFAULT
306 bool "Default"
307 help
308 Tune the generated code for the target processor for which the kernel
309 will be compiled.
310
Heiko Carstens1db9e052013-10-30 12:12:50 +0100311config TUNE_Z900
312 bool "IBM zSeries model z800 and z900"
313
314config TUNE_Z990
315 bool "IBM zSeries model z890 and z990"
316
317config TUNE_Z9_109
318 bool "IBM System z9"
319
320config TUNE_Z10
321 bool "IBM System z10"
322
323config TUNE_Z196
324 bool "IBM zEnterprise 114 and 196"
325
326config TUNE_ZEC12
327 bool "IBM zBC12 and zEC12"
328
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100329config TUNE_Z13
330 bool "IBM z13"
331
Heiko Carstens1db9e052013-10-30 12:12:50 +0100332endchoice
333
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800334config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100335 def_bool y
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200336
Jan Glauber843c48f2012-08-27 10:55:18 +0200337config COMPAT
338 def_bool y
339 prompt "Kernel support for 31 bit emulation"
Jan Glauber843c48f2012-08-27 10:55:18 +0200340 select COMPAT_BINFMT_ELF if BINFMT_ELF
341 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro7eddd992012-12-25 19:26:12 -0500342 select COMPAT_OLD_SIGACTION
Iulia Manda28138932015-04-15 16:16:41 -0700343 depends on MULTIUSER
Jan Glauber843c48f2012-08-27 10:55:18 +0200344 help
345 Select this option if you want to enable your system kernel to
346 handle system-calls from ELF binaries for 31 bit ESA. This option
347 (and some other stuff like libraries and such) is needed for
348 executing 31 bit applications. It is safe to say "Y".
349
350config SYSVIPC_COMPAT
351 def_bool y if COMPAT && SYSVIPC
352
353config KEYS_COMPAT
354 def_bool y if COMPAT && KEYS
355
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100357 def_bool y
358 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 ---help---
360 This enables support for systems with more than one CPU. If you have
361 a system with only one CPU, like most personal computers, say N. If
362 you have a system with more than one CPU, say Y.
363
Robert Graffham4a474152014-01-23 15:55:29 -0800364 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 machines, but will use only one CPU of a multiprocessor machine. If
366 you say Y here, the kernel will run on many, but not all,
Robert Graffham4a474152014-01-23 15:55:29 -0800367 uniprocessor machines. On a uniprocessor machine, the kernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 will run faster if you say N here.
369
Adrian Bunk03502fa2008-02-03 15:50:21 +0200370 See also the SMP-HOWTO available at
371 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
373 Even if you don't know what to do here, say Y.
374
375config NR_CPUS
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100376 int "Maximum number of CPUs (2-512)"
377 range 2 512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 depends on SMP
Heiko Carstens5a798592015-02-12 13:08:27 +0100379 default "64"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 help
381 This allows you to specify the maximum number of CPUs which this
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100382 kernel will support. The maximum supported value is 512 and the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 minimum value which makes sense is 2.
384
385 This is purely to save memory - each supported CPU adds
386 approximately sixteen kilobytes to the kernel image.
387
388config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100389 def_bool y
390 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 depends on SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 help
393 Say Y here to be able to turn CPUs off and on. CPUs
394 can be controlled through /sys/devices/system/cpu/cpu#.
395 Say N if you want to disable CPU hotplug.
396
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100397# Some NUMA nodes have memory ranges that span
398# other nodes. Even though a pfn is valid and
399# between a node's start and end pfns, it may not
400# reside on that node. See memmap_init_zone()
401# for details. <- They meant memory holes!
402config NODES_SPAN_OTHER_NODES
403 def_bool NUMA
404
405config NUMA
406 bool "NUMA support"
Heiko Carstensc095a942015-12-28 12:53:51 +0100407 depends on SMP && SCHED_TOPOLOGY
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100408 default n
409 help
410 Enable NUMA support
411
412 This option adds NUMA support to the kernel.
413
414 An operation mode can be selected by appending
415 numa=<method> to the kernel command line.
416
417 The default behaviour is identical to appending numa=plain to
418 the command line. This will create just one node with all
419 available memory and all CPUs in it.
420
421config NODES_SHIFT
422 int "Maximum NUMA nodes (as a power of 2)"
423 range 1 10
424 depends on NUMA
425 default "4"
426 help
427 Specify the maximum number of NUMA nodes available on the target
428 system. Increases memory reserved to accommodate various tables.
429
Michael Holzheuc29a7ba2014-03-06 18:47:21 +0100430menu "Select NUMA modes"
431 depends on NUMA
432
433config NUMA_EMU
434 bool "NUMA emulation"
435 default y
436 help
437 Numa emulation mode will split the available system memory into
438 equal chunks which then are distributed over the configured number
439 of nodes in a round-robin manner.
440
441 The number of fake nodes is limited by the number of available memory
442 chunks (i.e. memory size / fake size) and the number of supported
443 nodes in the kernel.
444
445 The CPUs are assigned to the nodes in a way that partially respects
446 the original machine topology (if supported by the machine).
447 Fair distribution of the CPUs is not guaranteed.
448
449config EMU_SIZE
450 hex "NUMA emulation memory chunk size"
451 default 0x10000000
452 range 0x400000 0x100000000
453 depends on NUMA_EMU
454 help
455 Select the default size by which the memory is chopped and then
456 assigned to emulated NUMA nodes.
457
458 This can be overridden by specifying
459
460 emu_size=<n>
461
462 on the kernel command line where also suffixes K, M, G, and T are
463 supported.
464
465endmenu
466
Heiko Carstens9236b4d2015-12-28 13:20:43 +0100467config SCHED_SMT
468 def_bool n
469
Heiko Carstens8d11e022010-10-29 16:50:37 +0200470config SCHED_MC
Heiko Carstens83a24e32011-12-27 11:27:09 +0100471 def_bool n
Heiko Carstens8d11e022010-10-29 16:50:37 +0200472
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200473config SCHED_BOOK
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100474 def_bool n
475
476config SCHED_TOPOLOGY
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100477 def_bool y
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100478 prompt "Topology scheduler support"
Heiko Carstens83a24e32011-12-27 11:27:09 +0100479 depends on SMP
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100480 select SCHED_SMT
Heiko Carstens83a24e32011-12-27 11:27:09 +0100481 select SCHED_MC
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100482 select SCHED_BOOK
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200483 help
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100484 Topology scheduler support improves the CPU scheduler's decision
485 making when dealing with machines that have multi-threading,
486 multiple cores or multiple books.
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200487
Jan Glauber843c48f2012-08-27 10:55:18 +0200488source kernel/Kconfig.preempt
489
Jan Glauber843c48f2012-08-27 10:55:18 +0200490source kernel/Kconfig.hz
491
492endmenu
493
494menu "Memory setup"
495
496config ARCH_SPARSEMEM_ENABLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100497 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200498 select SPARSEMEM_VMEMMAP_ENABLE
499 select SPARSEMEM_VMEMMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Jan Glauber843c48f2012-08-27 10:55:18 +0200501config ARCH_SPARSEMEM_DEFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100502 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400503
Jan Glauber843c48f2012-08-27 10:55:18 +0200504config ARCH_SELECT_MEMORY_MODEL
505 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200506
Jan Glauber843c48f2012-08-27 10:55:18 +0200507config ARCH_ENABLE_MEMORY_HOTPLUG
508 def_bool y if SPARSEMEM
Heiko Carstens05445162012-05-14 10:12:41 +0200509
Jan Glauber843c48f2012-08-27 10:55:18 +0200510config ARCH_ENABLE_MEMORY_HOTREMOVE
511 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200512
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100513config ARCH_ENABLE_SPLIT_PMD_PTLOCK
514 def_bool y
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100515
Jan Glauber843c48f2012-08-27 10:55:18 +0200516config FORCE_MAX_ZONEORDER
517 int
518 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200519
Jan Glauber843c48f2012-08-27 10:55:18 +0200520source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
522config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100523 def_bool y
524 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 help
526 This option enables the compiler option -mkernel-backchain if it
527 is available. If the option is available the compiler supports
528 the new stack layout which dramatically reduces the minimum stack
529 frame size. With an old compiler a non-leaf function needs a
530 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
531 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
532 and 24 byte on 64 bit.
533
534 Say Y if you are unsure.
535
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100537 def_bool y
538 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 help
540 This option enables the compiler option -mstack-guard and
541 -mstack-size if they are available. If the compiler supports them
542 it will emit additional code to each function prolog to trigger
543 an illegal operation if the kernel stack is about to overflow.
544
545 Say N if you are unsure.
546
547config STACK_GUARD
548 int "Size of the guard area (128-1024)"
549 range 128 1024
550 depends on CHECK_STACK
551 default "256"
552 help
553 This allows you to specify the size of the guard area at the lower
554 end of the kernel stack. If the kernel stack points into the guard
555 area on function entry an illegal operation is triggered. The size
556 needs to be a power of 2. Please keep in mind that the size of an
557 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
558 The minimum size for the stack guard should be 256 for 31 bit and
559 512 for 64 bit.
560
Jan Glauber2c190da2011-03-15 17:08:19 +0100561config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100562 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100563 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100565 This option enables the compiler option -mwarn-dynamicstack. If the
566 compiler supports this options generates warnings for functions
567 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568
569 Say N if you are unsure.
570
Jan Glauber843c48f2012-08-27 10:55:18 +0200571endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200572
Jan Glauber843c48f2012-08-27 10:55:18 +0200573menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100576 def_tristate y
577 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800579 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200580 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581
582 To compile this driver as a module, choose M here: the
583 module will be called qdio.
584
585 If unsure, say Y.
586
Jan Glauberc8717a32012-11-29 14:38:46 +0100587menuconfig PCI
588 bool "PCI support"
Jan Glauberc8717a32012-11-29 14:38:46 +0100589 select PCI_MSI
Gerald Schaefer8128f232015-08-27 15:33:03 +0200590 select IOMMU_SUPPORT
Jan Glauberc8717a32012-11-29 14:38:46 +0100591 help
592 Enable PCI support.
593
594if PCI
595
596config PCI_NR_FUNCTIONS
597 int "Maximum number of PCI functions (1-4096)"
598 range 1 4096
599 default "64"
600 help
601 This allows you to specify the maximum number of PCI functions which
602 this kernel will support.
603
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200604config PCI_NR_MSI
605 int "Maximum number of MSI interrupts (64-32768)"
606 range 64 32768
607 default "256"
608 help
609 This defines the number of virtual interrupts the kernel will
610 provide for MSI interrupts. If you configure your system to have
611 too few drivers will fail to allocate MSI interrupts for all
612 PCI devices.
613
Jan Glauberc8717a32012-11-29 14:38:46 +0100614source "drivers/pci/Kconfig"
Jan Glauberc8717a32012-11-29 14:38:46 +0100615
616endif # PCI
617
618config PCI_DOMAINS
619 def_bool PCI
620
621config HAS_IOMEM
622 def_bool PCI
623
624config IOMMU_HELPER
625 def_bool PCI
626
Jan Glauberc8717a32012-11-29 14:38:46 +0100627config NEED_SG_DMA_LENGTH
628 def_bool PCI
629
Jan Glauber91630032012-12-05 15:06:01 +0100630config NEED_DMA_MAP_STATE
631 def_bool PCI
632
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200633config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100634 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100635 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200636 help
637 This driver allows usage of CHSC subchannels. A CHSC subchannel
638 is usually present on LPAR only.
639 The driver creates a device /dev/chsc, which may be used to
640 obtain I/O configuration information about the machine and
641 to issue asynchronous chsc commands (DANGEROUS).
642 You will usually only want to use this interface on a special
643 LPAR designated for system management.
644
645 To compile this driver as a module, choose M here: the
646 module will be called chsc_sch.
647
648 If unsure, say N.
649
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200650config SCM_BUS
651 def_bool y
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200652 prompt "SCM bus driver"
653 help
654 Bus driver for Storage Class Memory.
655
Sebastian Otteadb86a2012-08-28 16:48:16 +0200656config EADM_SCH
657 def_tristate m
658 prompt "Support for EADM subchannels"
659 depends on SCM_BUS
660 help
661 This driver allows usage of EADM subchannels. EADM subchannels act
662 as a communication vehicle for SCM increments.
663
664 To compile this driver as a module, choose M here: the
665 module will be called eadm_sch.
666
Jan Glauber843c48f2012-08-27 10:55:18 +0200667endmenu
668
669menu "Dump support"
670
671config CRASH_DUMP
672 bool "kernel crash dumps"
Heiko Carstens5a798592015-02-12 13:08:27 +0100673 depends on SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200674 select KEXEC
675 help
676 Generate crash dump after being started by kexec.
677 Crash dump kernels are loaded in the main kernel with kexec-tools
678 into a specially reserved region and then later executed after
679 a crash by kdump/kexec.
Jan Glauber843c48f2012-08-27 10:55:18 +0200680 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
Michael Holzheubf28a592014-04-14 10:38:05 +0200681 This option also enables s390 zfcpdump.
682 See also <file:Documentation/s390/zfcpdump.txt>
Jan Glauber843c48f2012-08-27 10:55:18 +0200683
684endmenu
685
686menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688source "fs/Kconfig.binfmt"
689
Jan Glauber843c48f2012-08-27 10:55:18 +0200690config SECCOMP
691 def_bool y
692 prompt "Enable seccomp to safely compute untrusted bytecode"
693 depends on PROC_FS
694 help
695 This kernel feature is useful for number crunching applications
696 that may need to compute untrusted bytecode during their
697 execution. By using pipes or other transports made available to
698 the process as file descriptors supporting the read/write
699 syscalls, it's possible to isolate those applications in
700 their own address space using seccomp. Once seccomp is
701 enabled via /proc/<pid>/seccomp, it cannot be disabled
702 and the task is only allowed to execute a few safe syscalls
703 defined by each seccomp mode.
704
705 If unsure, say Y.
706
707endmenu
708
709menu "Power Management"
710
711config ARCH_HIBERNATION_POSSIBLE
Heiko Carstens5a798592015-02-12 13:08:27 +0100712 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200713
714source "kernel/power/Kconfig"
715
716endmenu
717
718source "net/Kconfig"
719
720config PCMCIA
721 def_bool n
722
723config CCW
724 def_bool y
725
726source "drivers/Kconfig"
727
728source "fs/Kconfig"
729
730source "arch/s390/Kconfig.debug"
731
732source "security/Kconfig"
733
734source "crypto/Kconfig"
735
736source "lib/Kconfig"
737
738menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100739
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100741 def_bool y
742 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 help
744 Select this option, if you want to use PFAULT pseudo page fault
745 handling under VM. If running native or in LPAR, this option
746 has no effect. If your VM does not support PFAULT, PAGEEX
747 pseudo page fault handling will be used.
748 Note that VM 4.2 supports PFAULT but has a bug in its
749 implementation that causes some problems.
750 Everybody who wants to run Linux under VM != VM4.2 should select
751 this option.
752
753config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200754 bool "VM shared kernel support"
755 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 help
757 Select this option, if you want to share the text segment of the
758 Linux kernel between different VM guests. This reduces memory
759 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100760 Also if a kernel was IPL'ed from a shared segment the kexec system
761 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 You should only select this option if you know what you are
763 doing and want to exploit this feature.
764
765config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100766 def_tristate n
767 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700768 help
769 Select this option, if you want to enable the kernel interface
770 to reduce the memory size of the system. This is accomplished
771 by allocating pages of memory and put them "on hold". This only
772 makes sense for a system running under VM where the unused pages
773 will be reused by VM for other guest systems. The interface
774 allows an external monitor to balance memory of many systems.
775 Everybody who wants to run Linux under VM should select this
776 option.
777
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100779 def_bool y
780 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
782 help
783 Select this option to enable the special message interface to
784 the cooperative memory management.
785
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100787 def_bool n
788 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100789 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 help
791 This provides a kernel interface for creating and updating z/VM APPLDATA
792 monitor records. The monitor records are updated at certain time
793 intervals, once the timer is started.
794 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
795 i.e. enables or disables monitoring on the Linux side.
796 A custom interval value (in seconds) can be written to
797 /proc/appldata/interval.
798
799 Defaults are 60 seconds interval and timer off.
800 The /proc entries can also be read from, showing the current settings.
801
802config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100803 def_tristate m
804 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800805 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 help
807 This provides memory management related data to the Linux - VM Monitor
808 Stream, like paging/swapping rate, memory utilisation, etc.
809 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
810 APPLDATA monitor record, i.e. enables or disables monitoring this record
811 on the z/VM side.
812
813 Default is disabled.
814 The /proc entry can also be read from, showing the current settings.
815
816 This can also be compiled as a module, which will be called
817 appldata_mem.o.
818
819config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100820 def_tristate m
821 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 depends on APPLDATA_BASE
823 help
824 This provides OS related data to the Linux - VM Monitor Stream, like
825 CPU utilisation, etc.
826 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
827 APPLDATA monitor record, i.e. enables or disables monitoring this record
828 on the z/VM side.
829
830 Default is disabled.
831 This can also be compiled as a module, which will be called
832 appldata_os.o.
833
834config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100835 def_tristate m
836 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100837 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 help
839 This provides network related data to the Linux - VM Monitor Stream,
840 currently there is only a total sum of network I/O statistics, no
841 per-interface data.
842 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
843 APPLDATA monitor record, i.e. enables or disables monitoring this record
844 on the z/VM side.
845
846 Default is disabled.
847 This can also be compiled as a module, which will be called
848 appldata_net_sum.o.
849
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700850config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100851 def_bool y
852 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700853 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700854 help
855 This is a virtual file system intended to provide accounting
856 information in an s390 hypervisor environment.
857
Jan Glauber843c48f2012-08-27 10:55:18 +0200858source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200859
Carsten Ottefa587742008-03-25 18:47:44 +0100860config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100861 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700862 prompt "s390 support for virtio devices"
Chen Gang79b6f7f2013-07-23 16:26:08 +0800863 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200864 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100865 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200866 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100867 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200868 Enabling this option adds support for virtio based paravirtual device
869 drivers on s390.
870
Christian Borntraeger20766c02008-08-29 13:30:56 +0200871 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200872 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200873
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874endmenu