blob: 3529a285dda816c1e93f4db28ef86e5aaee17541 [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
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
Zhaoxiu Zengfff7fb02016-05-20 17:03:57 -0700126 select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
Heiko Carstensc63cb462012-07-31 15:37:13 +0200127 select HAVE_ARCH_SECCOMP_FILTER
Martin Schwidefsky5614dd92015-04-22 14:47:42 +0200128 select HAVE_ARCH_SOFT_DIRTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100129 select HAVE_ARCH_TRACEHOOK
Heiko Carstens5a798592015-02-12 13:08:27 +0100130 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
Daniel Borkmann60777762016-05-13 19:08:28 +0200131 select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100132 select HAVE_CMPXCHG_DOUBLE
133 select HAVE_CMPXCHG_LOCAL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100134 select HAVE_DEBUG_KMEMLEAK
Christian Borntraegere82becfc2016-02-02 21:46:34 -0800135 select HAVE_DMA_API_DEBUG
Heiko Carstens5a798592015-02-12 13:08:27 +0100136 select HAVE_DYNAMIC_FTRACE
137 select HAVE_DYNAMIC_FTRACE_WITH_REGS
Jiri Slaby5f56a5d2016-05-20 17:00:16 -0700138 select HAVE_EXIT_THREAD
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100139 select HAVE_FTRACE_MCOUNT_RECORD
Heiko Carstens5a798592015-02-12 13:08:27 +0100140 select HAVE_FUNCTION_GRAPH_TRACER
141 select HAVE_FUNCTION_TRACER
Heiko Carstens03b8c7b2014-03-02 13:09:47 +0100142 select HAVE_FUTEX_CMPXCHG if FUTEX
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100143 select HAVE_KERNEL_BZIP2
144 select HAVE_KERNEL_GZIP
Heiko Carstens8e2872c2013-07-18 15:18:24 +0200145 select HAVE_KERNEL_LZ4
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100146 select HAVE_KERNEL_LZMA
147 select HAVE_KERNEL_LZO
148 select HAVE_KERNEL_XZ
149 select HAVE_KPROBES
150 select HAVE_KRETPROBES
Heiko Carstens5a798592015-02-12 13:08:27 +0100151 select HAVE_KVM
Jiri Slaby21042d42015-03-26 10:10:17 +0100152 select HAVE_LIVEPATCH
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100153 select HAVE_MEMBLOCK
154 select HAVE_MEMBLOCK_NODE_MAP
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100155 select HAVE_MEMBLOCK_PHYS_MAP
David Howells786d35d2012-09-28 14:31:03 +0930156 select HAVE_MOD_ARCH_SPECIFIC
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100157 select HAVE_OPROFILE
158 select HAVE_PERF_EVENTS
159 select HAVE_REGS_AND_STACK_ACCESS_API
160 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100161 select HAVE_VIRT_CPU_ACCOUNTING
David Howells786d35d2012-09-28 14:31:03 +0930162 select MODULES_USE_ELF_RELA
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100163 select NO_BOOTMEM
Al Viro7eddd992012-12-25 19:26:12 -0500164 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200165 select OLD_SIGSUSPEND3
Sebastian Ottbb98f392016-06-02 14:57:17 +0200166 select SPARSE_IRQ
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100167 select SYSCTL_EXCEPTION_TRACE
Josh Triplett05634162014-02-26 18:13:06 -0800168 select TTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100169 select VIRT_CPU_ACCOUNTING
Heiko Carstens93bead42013-09-06 10:03:30 +0200170 select VIRT_TO_BUS
Petr Mladek42a0bb32016-05-20 17:00:33 -0700171 select HAVE_NMI
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200174config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100175 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200176
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700177config PGTABLE_LEVELS
178 int
Heiko Carstensc095a942015-12-28 12:53:51 +0100179 default 4
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181source "init/Kconfig"
182
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700183source "kernel/Kconfig.freezer"
184
Jiri Slaby21042d42015-03-26 10:10:17 +0100185source "kernel/livepatch/Kconfig"
186
Jan Glauber843c48f2012-08-27 10:55:18 +0200187menu "Processor type and features"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Jan Glauber843c48f2012-08-27 10:55:18 +0200189config HAVE_MARCH_Z900_FEATURES
190 def_bool n
191
192config HAVE_MARCH_Z990_FEATURES
193 def_bool n
194 select HAVE_MARCH_Z900_FEATURES
195
196config HAVE_MARCH_Z9_109_FEATURES
197 def_bool n
198 select HAVE_MARCH_Z990_FEATURES
199
200config HAVE_MARCH_Z10_FEATURES
201 def_bool n
202 select HAVE_MARCH_Z9_109_FEATURES
203
204config HAVE_MARCH_Z196_FEATURES
205 def_bool n
206 select HAVE_MARCH_Z10_FEATURES
207
Heiko Carstens991c15052012-11-13 10:26:37 +0200208config HAVE_MARCH_ZEC12_FEATURES
209 def_bool n
210 select HAVE_MARCH_Z196_FEATURES
211
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100212config HAVE_MARCH_Z13_FEATURES
213 def_bool n
214 select HAVE_MARCH_ZEC12_FEATURES
215
Jan Glauber843c48f2012-08-27 10:55:18 +0200216choice
217 prompt "Processor type"
Martin Schwidefsky7072276e2016-04-18 17:10:16 +0200218 default MARCH_Z196
Jan Glauber843c48f2012-08-27 10:55:18 +0200219
220config MARCH_Z900
221 bool "IBM zSeries model z800 and z900"
Heiko Carstens5a798592015-02-12 13:08:27 +0100222 select HAVE_MARCH_Z900_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200223 help
224 Select this to enable optimizations for model z800/z900 (2064 and
225 2066 series). This will enable some optimizations that are not
226 available on older ESA/390 (31 Bit) only CPUs.
227
228config MARCH_Z990
229 bool "IBM zSeries model z890 and z990"
Heiko Carstens5a798592015-02-12 13:08:27 +0100230 select HAVE_MARCH_Z990_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200231 help
232 Select this to enable optimizations for model z890/z990 (2084 and
233 2086 series). The kernel will be slightly faster but will not work
234 on older machines.
235
236config MARCH_Z9_109
237 bool "IBM System z9"
Heiko Carstens5a798592015-02-12 13:08:27 +0100238 select HAVE_MARCH_Z9_109_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200239 help
240 Select this to enable optimizations for IBM System z9 (2094 and
241 2096 series). The kernel will be slightly faster but will not work
242 on older machines.
243
244config MARCH_Z10
245 bool "IBM System z10"
Heiko Carstens5a798592015-02-12 13:08:27 +0100246 select HAVE_MARCH_Z10_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200247 help
248 Select this to enable optimizations for IBM System z10 (2097 and
249 2098 series). The kernel will be slightly faster but will not work
250 on older machines.
251
252config MARCH_Z196
253 bool "IBM zEnterprise 114 and 196"
Heiko Carstens5a798592015-02-12 13:08:27 +0100254 select HAVE_MARCH_Z196_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200255 help
256 Select this to enable optimizations for IBM zEnterprise 114 and 196
257 (2818 and 2817 series). The kernel will be slightly faster but will
258 not work on older machines.
259
Heiko Carstens991c15052012-11-13 10:26:37 +0200260config MARCH_ZEC12
Heiko Carstens59471222013-07-24 10:35:33 +0200261 bool "IBM zBC12 and zEC12"
Heiko Carstens5a798592015-02-12 13:08:27 +0100262 select HAVE_MARCH_ZEC12_FEATURES
Heiko Carstens991c15052012-11-13 10:26:37 +0200263 help
Heiko Carstens59471222013-07-24 10:35:33 +0200264 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
265 2827 series). The kernel will be slightly faster but will not work on
266 older machines.
Heiko Carstens991c15052012-11-13 10:26:37 +0200267
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100268config MARCH_Z13
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100269 bool "IBM z13s and z13"
Heiko Carstens5a798592015-02-12 13:08:27 +0100270 select HAVE_MARCH_Z13_FEATURES
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100271 help
Heiko Carstensbb3aa612016-02-19 10:46:08 +0100272 Select this to enable optimizations for IBM z13s and z13 (2965 and
273 2964 series). The kernel will be slightly faster but will not work on
274 older machines.
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100275
Jan Glauber843c48f2012-08-27 10:55:18 +0200276endchoice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Heiko Carstens1db9e052013-10-30 12:12:50 +0100278config MARCH_Z900_TUNE
279 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
280
281config MARCH_Z990_TUNE
282 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
283
284config MARCH_Z9_109_TUNE
285 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
286
287config MARCH_Z10_TUNE
288 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
289
290config MARCH_Z196_TUNE
291 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
292
293config MARCH_ZEC12_TUNE
294 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
295
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100296config MARCH_Z13_TUNE
297 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
298
Heiko Carstens1db9e052013-10-30 12:12:50 +0100299choice
300 prompt "Tune code generation"
301 default TUNE_DEFAULT
302 help
303 Cause the compiler to tune (-mtune) the generated code for a machine.
304 This will make the code run faster on the selected machine but
305 somewhat slower on other machines.
306 This option only changes how the compiler emits instructions, not the
307 selection of instructions itself, so the resulting kernel will run on
308 all other machines.
309
310config TUNE_DEFAULT
311 bool "Default"
312 help
313 Tune the generated code for the target processor for which the kernel
314 will be compiled.
315
Heiko Carstens1db9e052013-10-30 12:12:50 +0100316config TUNE_Z900
317 bool "IBM zSeries model z800 and z900"
318
319config TUNE_Z990
320 bool "IBM zSeries model z890 and z990"
321
322config TUNE_Z9_109
323 bool "IBM System z9"
324
325config TUNE_Z10
326 bool "IBM System z10"
327
328config TUNE_Z196
329 bool "IBM zEnterprise 114 and 196"
330
331config TUNE_ZEC12
332 bool "IBM zBC12 and zEC12"
333
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100334config TUNE_Z13
335 bool "IBM z13"
336
Heiko Carstens1db9e052013-10-30 12:12:50 +0100337endchoice
338
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800339config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100340 def_bool y
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200341
Jan Glauber843c48f2012-08-27 10:55:18 +0200342config COMPAT
343 def_bool y
344 prompt "Kernel support for 31 bit emulation"
Jan Glauber843c48f2012-08-27 10:55:18 +0200345 select COMPAT_BINFMT_ELF if BINFMT_ELF
346 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro7eddd992012-12-25 19:26:12 -0500347 select COMPAT_OLD_SIGACTION
Iulia Manda28138932015-04-15 16:16:41 -0700348 depends on MULTIUSER
Jan Glauber843c48f2012-08-27 10:55:18 +0200349 help
350 Select this option if you want to enable your system kernel to
351 handle system-calls from ELF binaries for 31 bit ESA. This option
352 (and some other stuff like libraries and such) is needed for
353 executing 31 bit applications. It is safe to say "Y".
354
355config SYSVIPC_COMPAT
356 def_bool y if COMPAT && SYSVIPC
357
358config KEYS_COMPAT
359 def_bool y if COMPAT && KEYS
360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100362 def_bool y
363 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 ---help---
365 This enables support for systems with more than one CPU. If you have
366 a system with only one CPU, like most personal computers, say N. If
367 you have a system with more than one CPU, say Y.
368
Robert Graffham4a474152014-01-23 15:55:29 -0800369 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 machines, but will use only one CPU of a multiprocessor machine. If
371 you say Y here, the kernel will run on many, but not all,
Robert Graffham4a474152014-01-23 15:55:29 -0800372 uniprocessor machines. On a uniprocessor machine, the kernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 will run faster if you say N here.
374
Adrian Bunk03502fa2008-02-03 15:50:21 +0200375 See also the SMP-HOWTO available at
376 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
378 Even if you don't know what to do here, say Y.
379
380config NR_CPUS
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100381 int "Maximum number of CPUs (2-512)"
382 range 2 512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 depends on SMP
Heiko Carstens5a798592015-02-12 13:08:27 +0100384 default "64"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 help
386 This allows you to specify the maximum number of CPUs which this
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100387 kernel will support. The maximum supported value is 512 and the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 minimum value which makes sense is 2.
389
390 This is purely to save memory - each supported CPU adds
391 approximately sixteen kilobytes to the kernel image.
392
393config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100394 def_bool y
395 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 depends on SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397 help
398 Say Y here to be able to turn CPUs off and on. CPUs
399 can be controlled through /sys/devices/system/cpu/cpu#.
400 Say N if you want to disable CPU hotplug.
401
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100402# Some NUMA nodes have memory ranges that span
403# other nodes. Even though a pfn is valid and
404# between a node's start and end pfns, it may not
405# reside on that node. See memmap_init_zone()
406# for details. <- They meant memory holes!
407config NODES_SPAN_OTHER_NODES
408 def_bool NUMA
409
410config NUMA
411 bool "NUMA support"
Heiko Carstensc095a942015-12-28 12:53:51 +0100412 depends on SMP && SCHED_TOPOLOGY
Philipp Hachtmann3a368f72014-03-06 18:25:13 +0100413 default n
414 help
415 Enable NUMA support
416
417 This option adds NUMA support to the kernel.
418
419 An operation mode can be selected by appending
420 numa=<method> to the kernel command line.
421
422 The default behaviour is identical to appending numa=plain to
423 the command line. This will create just one node with all
424 available memory and all CPUs in it.
425
426config NODES_SHIFT
427 int "Maximum NUMA nodes (as a power of 2)"
428 range 1 10
429 depends on NUMA
430 default "4"
431 help
432 Specify the maximum number of NUMA nodes available on the target
433 system. Increases memory reserved to accommodate various tables.
434
Michael Holzheuc29a7ba2014-03-06 18:47:21 +0100435menu "Select NUMA modes"
436 depends on NUMA
437
438config NUMA_EMU
439 bool "NUMA emulation"
440 default y
441 help
442 Numa emulation mode will split the available system memory into
443 equal chunks which then are distributed over the configured number
444 of nodes in a round-robin manner.
445
446 The number of fake nodes is limited by the number of available memory
447 chunks (i.e. memory size / fake size) and the number of supported
448 nodes in the kernel.
449
450 The CPUs are assigned to the nodes in a way that partially respects
451 the original machine topology (if supported by the machine).
452 Fair distribution of the CPUs is not guaranteed.
453
454config EMU_SIZE
455 hex "NUMA emulation memory chunk size"
456 default 0x10000000
457 range 0x400000 0x100000000
458 depends on NUMA_EMU
459 help
460 Select the default size by which the memory is chopped and then
461 assigned to emulated NUMA nodes.
462
463 This can be overridden by specifying
464
465 emu_size=<n>
466
467 on the kernel command line where also suffixes K, M, G, and T are
468 supported.
469
470endmenu
471
Heiko Carstens9236b4d2015-12-28 13:20:43 +0100472config SCHED_SMT
473 def_bool n
474
Heiko Carstens8d11e022010-10-29 16:50:37 +0200475config SCHED_MC
Heiko Carstens83a24e32011-12-27 11:27:09 +0100476 def_bool n
Heiko Carstens8d11e022010-10-29 16:50:37 +0200477
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200478config SCHED_BOOK
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100479 def_bool n
480
481config SCHED_TOPOLOGY
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100482 def_bool y
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100483 prompt "Topology scheduler support"
Heiko Carstens83a24e32011-12-27 11:27:09 +0100484 depends on SMP
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100485 select SCHED_SMT
Heiko Carstens83a24e32011-12-27 11:27:09 +0100486 select SCHED_MC
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100487 select SCHED_BOOK
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200488 help
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100489 Topology scheduler support improves the CPU scheduler's decision
490 making when dealing with machines that have multi-threading,
491 multiple cores or multiple books.
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200492
Jan Glauber843c48f2012-08-27 10:55:18 +0200493source kernel/Kconfig.preempt
494
Jan Glauber843c48f2012-08-27 10:55:18 +0200495source kernel/Kconfig.hz
496
497endmenu
498
499menu "Memory setup"
500
501config ARCH_SPARSEMEM_ENABLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100502 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200503 select SPARSEMEM_VMEMMAP_ENABLE
504 select SPARSEMEM_VMEMMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
Jan Glauber843c48f2012-08-27 10:55:18 +0200506config ARCH_SPARSEMEM_DEFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100507 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400508
Jan Glauber843c48f2012-08-27 10:55:18 +0200509config ARCH_SELECT_MEMORY_MODEL
510 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200511
Jan Glauber843c48f2012-08-27 10:55:18 +0200512config ARCH_ENABLE_MEMORY_HOTPLUG
513 def_bool y if SPARSEMEM
Heiko Carstens05445162012-05-14 10:12:41 +0200514
Jan Glauber843c48f2012-08-27 10:55:18 +0200515config ARCH_ENABLE_MEMORY_HOTREMOVE
516 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200517
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100518config ARCH_ENABLE_SPLIT_PMD_PTLOCK
519 def_bool y
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100520
Jan Glauber843c48f2012-08-27 10:55:18 +0200521config FORCE_MAX_ZONEORDER
522 int
523 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200524
Jan Glauber843c48f2012-08-27 10:55:18 +0200525source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
527config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100528 def_bool y
529 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 help
531 This option enables the compiler option -mkernel-backchain if it
532 is available. If the option is available the compiler supports
533 the new stack layout which dramatically reduces the minimum stack
534 frame size. With an old compiler a non-leaf function needs a
535 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
536 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
537 and 24 byte on 64 bit.
538
539 Say Y if you are unsure.
540
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100542 def_bool y
543 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 help
545 This option enables the compiler option -mstack-guard and
546 -mstack-size if they are available. If the compiler supports them
547 it will emit additional code to each function prolog to trigger
548 an illegal operation if the kernel stack is about to overflow.
549
550 Say N if you are unsure.
551
552config STACK_GUARD
553 int "Size of the guard area (128-1024)"
554 range 128 1024
555 depends on CHECK_STACK
556 default "256"
557 help
558 This allows you to specify the size of the guard area at the lower
559 end of the kernel stack. If the kernel stack points into the guard
560 area on function entry an illegal operation is triggered. The size
561 needs to be a power of 2. Please keep in mind that the size of an
562 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
563 The minimum size for the stack guard should be 256 for 31 bit and
564 512 for 64 bit.
565
Jan Glauber2c190da2011-03-15 17:08:19 +0100566config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100567 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100568 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100570 This option enables the compiler option -mwarn-dynamicstack. If the
571 compiler supports this options generates warnings for functions
572 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
574 Say N if you are unsure.
575
Jan Glauber843c48f2012-08-27 10:55:18 +0200576endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200577
Jan Glauber843c48f2012-08-27 10:55:18 +0200578menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100581 def_tristate y
582 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800584 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200585 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586
587 To compile this driver as a module, choose M here: the
588 module will be called qdio.
589
590 If unsure, say Y.
591
Jan Glauberc8717a32012-11-29 14:38:46 +0100592menuconfig PCI
593 bool "PCI support"
Jan Glauberc8717a32012-11-29 14:38:46 +0100594 select PCI_MSI
Gerald Schaefer8128f23c2015-08-27 15:33:03 +0200595 select IOMMU_SUPPORT
Jan Glauberc8717a32012-11-29 14:38:46 +0100596 help
597 Enable PCI support.
598
599if PCI
600
601config PCI_NR_FUNCTIONS
602 int "Maximum number of PCI functions (1-4096)"
603 range 1 4096
604 default "64"
605 help
606 This allows you to specify the maximum number of PCI functions which
607 this kernel will support.
608
609source "drivers/pci/Kconfig"
Jan Glauberc8717a32012-11-29 14:38:46 +0100610
611endif # PCI
612
613config PCI_DOMAINS
614 def_bool PCI
615
616config HAS_IOMEM
617 def_bool PCI
618
619config IOMMU_HELPER
620 def_bool PCI
621
Jan Glauberc8717a32012-11-29 14:38:46 +0100622config NEED_SG_DMA_LENGTH
623 def_bool PCI
624
Jan Glauber91630032012-12-05 15:06:01 +0100625config NEED_DMA_MAP_STATE
626 def_bool PCI
627
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200628config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100629 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100630 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200631 help
632 This driver allows usage of CHSC subchannels. A CHSC subchannel
633 is usually present on LPAR only.
634 The driver creates a device /dev/chsc, which may be used to
635 obtain I/O configuration information about the machine and
636 to issue asynchronous chsc commands (DANGEROUS).
637 You will usually only want to use this interface on a special
638 LPAR designated for system management.
639
640 To compile this driver as a module, choose M here: the
641 module will be called chsc_sch.
642
643 If unsure, say N.
644
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200645config SCM_BUS
646 def_bool y
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200647 prompt "SCM bus driver"
648 help
649 Bus driver for Storage Class Memory.
650
Sebastian Otteadb86a2012-08-28 16:48:16 +0200651config EADM_SCH
652 def_tristate m
653 prompt "Support for EADM subchannels"
654 depends on SCM_BUS
655 help
656 This driver allows usage of EADM subchannels. EADM subchannels act
657 as a communication vehicle for SCM increments.
658
659 To compile this driver as a module, choose M here: the
660 module will be called eadm_sch.
661
Jan Glauber843c48f2012-08-27 10:55:18 +0200662endmenu
663
664menu "Dump support"
665
666config CRASH_DUMP
667 bool "kernel crash dumps"
Heiko Carstens5a798592015-02-12 13:08:27 +0100668 depends on SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200669 select KEXEC
670 help
671 Generate crash dump after being started by kexec.
672 Crash dump kernels are loaded in the main kernel with kexec-tools
673 into a specially reserved region and then later executed after
674 a crash by kdump/kexec.
Jan Glauber843c48f2012-08-27 10:55:18 +0200675 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
Michael Holzheubf28a592014-04-14 10:38:05 +0200676 This option also enables s390 zfcpdump.
677 See also <file:Documentation/s390/zfcpdump.txt>
Jan Glauber843c48f2012-08-27 10:55:18 +0200678
679endmenu
680
681menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683source "fs/Kconfig.binfmt"
684
Jan Glauber843c48f2012-08-27 10:55:18 +0200685config SECCOMP
686 def_bool y
687 prompt "Enable seccomp to safely compute untrusted bytecode"
688 depends on PROC_FS
689 help
690 This kernel feature is useful for number crunching applications
691 that may need to compute untrusted bytecode during their
692 execution. By using pipes or other transports made available to
693 the process as file descriptors supporting the read/write
694 syscalls, it's possible to isolate those applications in
695 their own address space using seccomp. Once seccomp is
696 enabled via /proc/<pid>/seccomp, it cannot be disabled
697 and the task is only allowed to execute a few safe syscalls
698 defined by each seccomp mode.
699
700 If unsure, say Y.
701
702endmenu
703
704menu "Power Management"
705
706config ARCH_HIBERNATION_POSSIBLE
Heiko Carstens5a798592015-02-12 13:08:27 +0100707 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200708
709source "kernel/power/Kconfig"
710
711endmenu
712
713source "net/Kconfig"
714
715config PCMCIA
716 def_bool n
717
718config CCW
719 def_bool y
720
721source "drivers/Kconfig"
722
723source "fs/Kconfig"
724
725source "arch/s390/Kconfig.debug"
726
727source "security/Kconfig"
728
729source "crypto/Kconfig"
730
731source "lib/Kconfig"
732
733menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100734
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100736 def_bool y
737 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738 help
739 Select this option, if you want to use PFAULT pseudo page fault
740 handling under VM. If running native or in LPAR, this option
741 has no effect. If your VM does not support PFAULT, PAGEEX
742 pseudo page fault handling will be used.
743 Note that VM 4.2 supports PFAULT but has a bug in its
744 implementation that causes some problems.
745 Everybody who wants to run Linux under VM != VM4.2 should select
746 this option.
747
748config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200749 bool "VM shared kernel support"
750 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 help
752 Select this option, if you want to share the text segment of the
753 Linux kernel between different VM guests. This reduces memory
754 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100755 Also if a kernel was IPL'ed from a shared segment the kexec system
756 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 You should only select this option if you know what you are
758 doing and want to exploit this feature.
759
760config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100761 def_tristate n
762 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 help
764 Select this option, if you want to enable the kernel interface
765 to reduce the memory size of the system. This is accomplished
766 by allocating pages of memory and put them "on hold". This only
767 makes sense for a system running under VM where the unused pages
768 will be reused by VM for other guest systems. The interface
769 allows an external monitor to balance memory of many systems.
770 Everybody who wants to run Linux under VM should select this
771 option.
772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100774 def_bool y
775 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
777 help
778 Select this option to enable the special message interface to
779 the cooperative memory management.
780
Linus Torvalds1da177e2005-04-16 15:20:36 -0700781config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100782 def_bool n
783 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100784 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785 help
786 This provides a kernel interface for creating and updating z/VM APPLDATA
787 monitor records. The monitor records are updated at certain time
788 intervals, once the timer is started.
789 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
790 i.e. enables or disables monitoring on the Linux side.
791 A custom interval value (in seconds) can be written to
792 /proc/appldata/interval.
793
794 Defaults are 60 seconds interval and timer off.
795 The /proc entries can also be read from, showing the current settings.
796
797config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100798 def_tristate m
799 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800800 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 help
802 This provides memory management related data to the Linux - VM Monitor
803 Stream, like paging/swapping rate, memory utilisation, etc.
804 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
805 APPLDATA monitor record, i.e. enables or disables monitoring this record
806 on the z/VM side.
807
808 Default is disabled.
809 The /proc entry can also be read from, showing the current settings.
810
811 This can also be compiled as a module, which will be called
812 appldata_mem.o.
813
814config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100815 def_tristate m
816 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 depends on APPLDATA_BASE
818 help
819 This provides OS related data to the Linux - VM Monitor Stream, like
820 CPU utilisation, etc.
821 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
822 APPLDATA monitor record, i.e. enables or disables monitoring this record
823 on the z/VM side.
824
825 Default is disabled.
826 This can also be compiled as a module, which will be called
827 appldata_os.o.
828
829config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100830 def_tristate m
831 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100832 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 help
834 This provides network related data to the Linux - VM Monitor Stream,
835 currently there is only a total sum of network I/O statistics, no
836 per-interface data.
837 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
838 APPLDATA monitor record, i.e. enables or disables monitoring this record
839 on the z/VM side.
840
841 Default is disabled.
842 This can also be compiled as a module, which will be called
843 appldata_net_sum.o.
844
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700845config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100846 def_bool y
847 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700848 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700849 help
850 This is a virtual file system intended to provide accounting
851 information in an s390 hypervisor environment.
852
Jan Glauber843c48f2012-08-27 10:55:18 +0200853source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200854
Carsten Ottefa587742008-03-25 18:47:44 +0100855config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100856 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700857 prompt "s390 support for virtio devices"
Chen Gang79b6f7f2013-07-23 16:26:08 +0800858 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200859 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100860 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200861 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100862 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200863 Enabling this option adds support for virtio based paravirtual device
864 drivers on s390.
865
Christian Borntraeger20766c02008-08-29 13:30:56 +0200866 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200867 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200868
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869endmenu