blob: a5ced5c3c1e0fe9eced298c30fd50ff2c8168274 [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
Heiko Carstensa3afe702008-02-05 16:50:45 +010013config HAVE_LATENCYTOP_SUPPORT
14 def_bool y
15
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
51
52config AUDIT_ARCH
53 def_bool y
54
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -070055config NO_IOPORT_MAP
Jan Glauberc8717a32012-11-29 14:38:46 +010056 def_bool y
57
58config PCI_QUIRKS
59 def_bool n
60
Jan Willeke2a0a5b22014-09-22 16:39:06 +020061config ARCH_SUPPORTS_UPROBES
Heiko Carstens5a798592015-02-12 13:08:27 +010062 def_bool y
Jan Willeke2a0a5b22014-09-22 16:39:06 +020063
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -080064config S390
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020065 def_bool y
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010066 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Heiko Carstens93bead42013-09-06 10:03:30 +020067 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
Kees Cook2b68f6c2015-04-14 15:48:00 -070068 select ARCH_HAS_ELF_RANDOMIZE
Riku Voipio957e3fa2014-12-12 16:57:44 -080069 select ARCH_HAS_GCOV_PROFILE_ALL
Heiko Carstens47523c92014-12-22 10:07:04 +010070 select ARCH_HAS_SG_CHAIN
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010071 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Thomas Gleixner6beb0002009-11-09 15:21:34 +000072 select ARCH_INLINE_READ_LOCK
73 select ARCH_INLINE_READ_LOCK_BH
74 select ARCH_INLINE_READ_LOCK_IRQ
75 select ARCH_INLINE_READ_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010076 select ARCH_INLINE_READ_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000077 select ARCH_INLINE_READ_UNLOCK
78 select ARCH_INLINE_READ_UNLOCK_BH
79 select ARCH_INLINE_READ_UNLOCK_IRQ
80 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010081 select ARCH_INLINE_SPIN_LOCK
82 select ARCH_INLINE_SPIN_LOCK_BH
83 select ARCH_INLINE_SPIN_LOCK_IRQ
84 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
85 select ARCH_INLINE_SPIN_TRYLOCK
86 select ARCH_INLINE_SPIN_TRYLOCK_BH
87 select ARCH_INLINE_SPIN_UNLOCK
88 select ARCH_INLINE_SPIN_UNLOCK_BH
89 select ARCH_INLINE_SPIN_UNLOCK_IRQ
90 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
Thomas Gleixner6beb0002009-11-09 15:21:34 +000091 select ARCH_INLINE_WRITE_LOCK
92 select ARCH_INLINE_WRITE_LOCK_BH
93 select ARCH_INLINE_WRITE_LOCK_IRQ
94 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010095 select ARCH_INLINE_WRITE_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000096 select ARCH_INLINE_WRITE_UNLOCK
97 select ARCH_INLINE_WRITE_UNLOCK_BH
98 select ARCH_INLINE_WRITE_UNLOCK_IRQ
99 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100100 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
Christian Borntraeger36e7fda2014-08-05 09:57:51 +0200101 select ARCH_SUPPORTS_ATOMIC_RMW
Heiko Carstensefc1d232013-09-05 13:26:17 +0200102 select ARCH_USE_CMPXCHG_LOCKREF
Will Deaconc1d7e012012-07-30 14:42:46 -0700103 select ARCH_WANT_IPC_PARSE_VERSION
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100104 select BUILDTIME_EXTABLE_SORT
105 select CLONE_BACKWARDS2
Heiko Carstens5d6a0162014-08-15 13:16:09 +0200106 select DYNAMIC_FTRACE if FUNCTION_TRACER
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100107 select GENERIC_CLOCKEVENTS
108 select GENERIC_CPU_DEVICES if !SMP
Heiko Carstens746479c2013-09-18 11:45:36 +0200109 select GENERIC_FIND_FIRST_BIT
Thomas Gleixnere80e7812012-04-20 13:05:52 +0000110 select GENERIC_SMP_IDLE_THREAD
Martin Schwidefsky79c74ec2013-11-22 10:04:53 +0100111 select GENERIC_TIME_VSYSCALL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100112 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
AKASHI Takahiro7a017722014-02-25 18:16:24 +0900113 select HAVE_ARCH_AUDITSYSCALL
Heiko Carstens5a798592015-02-12 13:08:27 +0100114 select HAVE_ARCH_JUMP_LABEL
Heiko Carstensc63cb462012-07-31 15:37:13 +0200115 select HAVE_ARCH_SECCOMP_FILTER
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100116 select HAVE_ARCH_TRACEHOOK
Heiko Carstens5a798592015-02-12 13:08:27 +0100117 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
118 select HAVE_BPF_JIT if PACK_STACK
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100119 select HAVE_CMPXCHG_DOUBLE
120 select HAVE_CMPXCHG_LOCAL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100121 select HAVE_DEBUG_KMEMLEAK
Heiko Carstens5a798592015-02-12 13:08:27 +0100122 select HAVE_DYNAMIC_FTRACE
123 select HAVE_DYNAMIC_FTRACE_WITH_REGS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100124 select HAVE_FTRACE_MCOUNT_RECORD
Heiko Carstens5a798592015-02-12 13:08:27 +0100125 select HAVE_FUNCTION_GRAPH_TRACER
126 select HAVE_FUNCTION_TRACER
Heiko Carstens03b8c7b2014-03-02 13:09:47 +0100127 select HAVE_FUTEX_CMPXCHG if FUTEX
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100128 select HAVE_KERNEL_BZIP2
129 select HAVE_KERNEL_GZIP
Heiko Carstens8e2872c2013-07-18 15:18:24 +0200130 select HAVE_KERNEL_LZ4
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100131 select HAVE_KERNEL_LZMA
132 select HAVE_KERNEL_LZO
133 select HAVE_KERNEL_XZ
134 select HAVE_KPROBES
135 select HAVE_KRETPROBES
Heiko Carstens5a798592015-02-12 13:08:27 +0100136 select HAVE_KVM
Jiri Slaby21042d42015-03-26 10:10:17 +0100137 select HAVE_LIVEPATCH
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100138 select HAVE_MEMBLOCK
139 select HAVE_MEMBLOCK_NODE_MAP
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100140 select HAVE_MEMBLOCK_PHYS_MAP
David Howells786d35d2012-09-28 14:31:03 +0930141 select HAVE_MOD_ARCH_SPECIFIC
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100142 select HAVE_OPROFILE
143 select HAVE_PERF_EVENTS
144 select HAVE_REGS_AND_STACK_ACCESS_API
145 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100146 select HAVE_VIRT_CPU_ACCOUNTING
David Howells786d35d2012-09-28 14:31:03 +0930147 select MODULES_USE_ELF_RELA
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100148 select NO_BOOTMEM
Al Viro7eddd992012-12-25 19:26:12 -0500149 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200150 select OLD_SIGSUSPEND3
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100151 select SYSCTL_EXCEPTION_TRACE
Josh Triplett05634162014-02-26 18:13:06 -0800152 select TTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100153 select VIRT_CPU_ACCOUNTING
Heiko Carstens93bead42013-09-06 10:03:30 +0200154 select VIRT_TO_BUS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200156config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100157 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200158
Kirill A. Shutemovc81956c2015-04-14 15:46:00 -0700159config PGTABLE_LEVELS
160 int
161 default 4 if 64BIT
162 default 2
163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164source "init/Kconfig"
165
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700166source "kernel/Kconfig.freezer"
167
Jiri Slaby21042d42015-03-26 10:10:17 +0100168source "kernel/livepatch/Kconfig"
169
Jan Glauber843c48f2012-08-27 10:55:18 +0200170menu "Processor type and features"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Jan Glauber843c48f2012-08-27 10:55:18 +0200172config HAVE_MARCH_Z900_FEATURES
173 def_bool n
174
175config HAVE_MARCH_Z990_FEATURES
176 def_bool n
177 select HAVE_MARCH_Z900_FEATURES
178
179config HAVE_MARCH_Z9_109_FEATURES
180 def_bool n
181 select HAVE_MARCH_Z990_FEATURES
182
183config HAVE_MARCH_Z10_FEATURES
184 def_bool n
185 select HAVE_MARCH_Z9_109_FEATURES
186
187config HAVE_MARCH_Z196_FEATURES
188 def_bool n
189 select HAVE_MARCH_Z10_FEATURES
190
Heiko Carstens991c15052012-11-13 10:26:37 +0200191config HAVE_MARCH_ZEC12_FEATURES
192 def_bool n
193 select HAVE_MARCH_Z196_FEATURES
194
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100195config HAVE_MARCH_Z13_FEATURES
196 def_bool n
197 select HAVE_MARCH_ZEC12_FEATURES
198
Jan Glauber843c48f2012-08-27 10:55:18 +0200199choice
200 prompt "Processor type"
Heiko Carstens5a798592015-02-12 13:08:27 +0100201 default MARCH_Z900
Jan Glauber843c48f2012-08-27 10:55:18 +0200202
203config MARCH_Z900
204 bool "IBM zSeries model z800 and z900"
Heiko Carstens5a798592015-02-12 13:08:27 +0100205 select HAVE_MARCH_Z900_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200206 help
207 Select this to enable optimizations for model z800/z900 (2064 and
208 2066 series). This will enable some optimizations that are not
209 available on older ESA/390 (31 Bit) only CPUs.
210
211config MARCH_Z990
212 bool "IBM zSeries model z890 and z990"
Heiko Carstens5a798592015-02-12 13:08:27 +0100213 select HAVE_MARCH_Z990_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200214 help
215 Select this to enable optimizations for model z890/z990 (2084 and
216 2086 series). The kernel will be slightly faster but will not work
217 on older machines.
218
219config MARCH_Z9_109
220 bool "IBM System z9"
Heiko Carstens5a798592015-02-12 13:08:27 +0100221 select HAVE_MARCH_Z9_109_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200222 help
223 Select this to enable optimizations for IBM System z9 (2094 and
224 2096 series). The kernel will be slightly faster but will not work
225 on older machines.
226
227config MARCH_Z10
228 bool "IBM System z10"
Heiko Carstens5a798592015-02-12 13:08:27 +0100229 select HAVE_MARCH_Z10_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200230 help
231 Select this to enable optimizations for IBM System z10 (2097 and
232 2098 series). The kernel will be slightly faster but will not work
233 on older machines.
234
235config MARCH_Z196
236 bool "IBM zEnterprise 114 and 196"
Heiko Carstens5a798592015-02-12 13:08:27 +0100237 select HAVE_MARCH_Z196_FEATURES
Jan Glauber843c48f2012-08-27 10:55:18 +0200238 help
239 Select this to enable optimizations for IBM zEnterprise 114 and 196
240 (2818 and 2817 series). The kernel will be slightly faster but will
241 not work on older machines.
242
Heiko Carstens991c15052012-11-13 10:26:37 +0200243config MARCH_ZEC12
Heiko Carstens59471222013-07-24 10:35:33 +0200244 bool "IBM zBC12 and zEC12"
Heiko Carstens5a798592015-02-12 13:08:27 +0100245 select HAVE_MARCH_ZEC12_FEATURES
Heiko Carstens991c15052012-11-13 10:26:37 +0200246 help
Heiko Carstens59471222013-07-24 10:35:33 +0200247 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
248 2827 series). The kernel will be slightly faster but will not work on
249 older machines.
Heiko Carstens991c15052012-11-13 10:26:37 +0200250
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100251config MARCH_Z13
252 bool "IBM z13"
Heiko Carstens5a798592015-02-12 13:08:27 +0100253 select HAVE_MARCH_Z13_FEATURES
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100254 help
255 Select this to enable optimizations for IBM z13 (2964 series).
256 The kernel will be slightly faster but will not work on older
257 machines.
258
Jan Glauber843c48f2012-08-27 10:55:18 +0200259endchoice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Heiko Carstens1db9e052013-10-30 12:12:50 +0100261config MARCH_Z900_TUNE
262 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
263
264config MARCH_Z990_TUNE
265 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
266
267config MARCH_Z9_109_TUNE
268 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
269
270config MARCH_Z10_TUNE
271 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
272
273config MARCH_Z196_TUNE
274 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
275
276config MARCH_ZEC12_TUNE
277 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
278
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100279config MARCH_Z13_TUNE
280 def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
281
Heiko Carstens1db9e052013-10-30 12:12:50 +0100282choice
283 prompt "Tune code generation"
284 default TUNE_DEFAULT
285 help
286 Cause the compiler to tune (-mtune) the generated code for a machine.
287 This will make the code run faster on the selected machine but
288 somewhat slower on other machines.
289 This option only changes how the compiler emits instructions, not the
290 selection of instructions itself, so the resulting kernel will run on
291 all other machines.
292
293config TUNE_DEFAULT
294 bool "Default"
295 help
296 Tune the generated code for the target processor for which the kernel
297 will be compiled.
298
Heiko Carstens1db9e052013-10-30 12:12:50 +0100299config TUNE_Z900
300 bool "IBM zSeries model z800 and z900"
301
302config TUNE_Z990
303 bool "IBM zSeries model z890 and z990"
304
305config TUNE_Z9_109
306 bool "IBM System z9"
307
308config TUNE_Z10
309 bool "IBM System z10"
310
311config TUNE_Z196
312 bool "IBM zEnterprise 114 and 196"
313
314config TUNE_ZEC12
315 bool "IBM zBC12 and zEC12"
316
Martin Schwidefskyf8b2dcb2015-01-14 17:50:19 +0100317config TUNE_Z13
318 bool "IBM z13"
319
Heiko Carstens1db9e052013-10-30 12:12:50 +0100320endchoice
321
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800322config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100323 def_bool y
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200324
Jan Glauber843c48f2012-08-27 10:55:18 +0200325config COMPAT
326 def_bool y
327 prompt "Kernel support for 31 bit emulation"
Jan Glauber843c48f2012-08-27 10:55:18 +0200328 select COMPAT_BINFMT_ELF if BINFMT_ELF
329 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro7eddd992012-12-25 19:26:12 -0500330 select COMPAT_OLD_SIGACTION
Jan Glauber843c48f2012-08-27 10:55:18 +0200331 help
332 Select this option if you want to enable your system kernel to
333 handle system-calls from ELF binaries for 31 bit ESA. This option
334 (and some other stuff like libraries and such) is needed for
335 executing 31 bit applications. It is safe to say "Y".
336
337config SYSVIPC_COMPAT
338 def_bool y if COMPAT && SYSVIPC
339
340config KEYS_COMPAT
341 def_bool y if COMPAT && KEYS
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100344 def_bool y
345 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 ---help---
347 This enables support for systems with more than one CPU. If you have
348 a system with only one CPU, like most personal computers, say N. If
349 you have a system with more than one CPU, say Y.
350
Robert Graffham4a474152014-01-23 15:55:29 -0800351 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 machines, but will use only one CPU of a multiprocessor machine. If
353 you say Y here, the kernel will run on many, but not all,
Robert Graffham4a474152014-01-23 15:55:29 -0800354 uniprocessor machines. On a uniprocessor machine, the kernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 will run faster if you say N here.
356
Adrian Bunk03502fa2008-02-03 15:50:21 +0200357 See also the SMP-HOWTO available at
358 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
360 Even if you don't know what to do here, say Y.
361
362config NR_CPUS
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100363 int "Maximum number of CPUs (2-512)"
364 range 2 512
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 depends on SMP
Heiko Carstens5a798592015-02-12 13:08:27 +0100366 default "64"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 help
368 This allows you to specify the maximum number of CPUs which this
Heiko Carstens5c75a0d2015-01-28 16:52:01 +0100369 kernel will support. The maximum supported value is 512 and the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 minimum value which makes sense is 2.
371
372 This is purely to save memory - each supported CPU adds
373 approximately sixteen kilobytes to the kernel image.
374
375config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100376 def_bool y
377 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 depends on SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 help
380 Say Y here to be able to turn CPUs off and on. CPUs
381 can be controlled through /sys/devices/system/cpu/cpu#.
382 Say N if you want to disable CPU hotplug.
383
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100384config SCHED_SMT
385 def_bool n
386
Heiko Carstens8d11e022010-10-29 16:50:37 +0200387config SCHED_MC
Heiko Carstens83a24e32011-12-27 11:27:09 +0100388 def_bool n
Heiko Carstens8d11e022010-10-29 16:50:37 +0200389
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200390config SCHED_BOOK
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100391 def_bool n
392
393config SCHED_TOPOLOGY
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100394 def_bool y
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100395 prompt "Topology scheduler support"
Heiko Carstens83a24e32011-12-27 11:27:09 +0100396 depends on SMP
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100397 select SCHED_SMT
Heiko Carstens83a24e32011-12-27 11:27:09 +0100398 select SCHED_MC
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100399 select SCHED_BOOK
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200400 help
Martin Schwidefsky10ad34b2015-01-14 17:52:10 +0100401 Topology scheduler support improves the CPU scheduler's decision
402 making when dealing with machines that have multi-threading,
403 multiple cores or multiple books.
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200404
Jan Glauber843c48f2012-08-27 10:55:18 +0200405source kernel/Kconfig.preempt
406
Jan Glauber843c48f2012-08-27 10:55:18 +0200407source kernel/Kconfig.hz
408
409endmenu
410
411menu "Memory setup"
412
413config ARCH_SPARSEMEM_ENABLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100414 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200415 select SPARSEMEM_VMEMMAP_ENABLE
416 select SPARSEMEM_VMEMMAP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417
Jan Glauber843c48f2012-08-27 10:55:18 +0200418config ARCH_SPARSEMEM_DEFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100419 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400420
Jan Glauber843c48f2012-08-27 10:55:18 +0200421config ARCH_SELECT_MEMORY_MODEL
422 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200423
Jan Glauber843c48f2012-08-27 10:55:18 +0200424config ARCH_ENABLE_MEMORY_HOTPLUG
425 def_bool y if SPARSEMEM
Heiko Carstens05445162012-05-14 10:12:41 +0200426
Jan Glauber843c48f2012-08-27 10:55:18 +0200427config ARCH_ENABLE_MEMORY_HOTREMOVE
428 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200429
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100430config ARCH_ENABLE_SPLIT_PMD_PTLOCK
431 def_bool y
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100432
Jan Glauber843c48f2012-08-27 10:55:18 +0200433config FORCE_MAX_ZONEORDER
434 int
435 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200436
Jan Glauber843c48f2012-08-27 10:55:18 +0200437source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438
439config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100440 def_bool y
441 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 help
443 This option enables the compiler option -mkernel-backchain if it
444 is available. If the option is available the compiler supports
445 the new stack layout which dramatically reduces the minimum stack
446 frame size. With an old compiler a non-leaf function needs a
447 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
448 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
449 and 24 byte on 64 bit.
450
451 Say Y if you are unsure.
452
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100454 def_bool y
455 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 help
457 This option enables the compiler option -mstack-guard and
458 -mstack-size if they are available. If the compiler supports them
459 it will emit additional code to each function prolog to trigger
460 an illegal operation if the kernel stack is about to overflow.
461
462 Say N if you are unsure.
463
464config STACK_GUARD
465 int "Size of the guard area (128-1024)"
466 range 128 1024
467 depends on CHECK_STACK
468 default "256"
469 help
470 This allows you to specify the size of the guard area at the lower
471 end of the kernel stack. If the kernel stack points into the guard
472 area on function entry an illegal operation is triggered. The size
473 needs to be a power of 2. Please keep in mind that the size of an
474 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
475 The minimum size for the stack guard should be 256 for 31 bit and
476 512 for 64 bit.
477
Jan Glauber2c190da2011-03-15 17:08:19 +0100478config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100479 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100480 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100482 This option enables the compiler option -mwarn-dynamicstack. If the
483 compiler supports this options generates warnings for functions
484 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
486 Say N if you are unsure.
487
Jan Glauber843c48f2012-08-27 10:55:18 +0200488endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200489
Jan Glauber843c48f2012-08-27 10:55:18 +0200490menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100493 def_tristate y
494 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800496 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200497 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499 To compile this driver as a module, choose M here: the
500 module will be called qdio.
501
502 If unsure, say Y.
503
Jan Glauberc8717a32012-11-29 14:38:46 +0100504menuconfig PCI
505 bool "PCI support"
Thierry Reding90114d62014-08-25 13:02:52 +0200506 select HAVE_DMA_ATTRS
Jan Glauberc8717a32012-11-29 14:38:46 +0100507 select PCI_MSI
508 help
509 Enable PCI support.
510
511if PCI
512
513config PCI_NR_FUNCTIONS
514 int "Maximum number of PCI functions (1-4096)"
515 range 1 4096
516 default "64"
517 help
518 This allows you to specify the maximum number of PCI functions which
519 this kernel will support.
520
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200521config PCI_NR_MSI
522 int "Maximum number of MSI interrupts (64-32768)"
523 range 64 32768
524 default "256"
525 help
526 This defines the number of virtual interrupts the kernel will
527 provide for MSI interrupts. If you configure your system to have
528 too few drivers will fail to allocate MSI interrupts for all
529 PCI devices.
530
Jan Glauberc8717a32012-11-29 14:38:46 +0100531source "drivers/pci/Kconfig"
532source "drivers/pci/pcie/Kconfig"
533source "drivers/pci/hotplug/Kconfig"
534
535endif # PCI
536
537config PCI_DOMAINS
538 def_bool PCI
539
540config HAS_IOMEM
541 def_bool PCI
542
543config IOMMU_HELPER
544 def_bool PCI
545
546config HAS_DMA
547 def_bool PCI
548 select HAVE_DMA_API_DEBUG
549
550config NEED_SG_DMA_LENGTH
551 def_bool PCI
552
Jan Glauber91630032012-12-05 15:06:01 +0100553config NEED_DMA_MAP_STATE
554 def_bool PCI
555
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200556config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100557 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100558 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200559 help
560 This driver allows usage of CHSC subchannels. A CHSC subchannel
561 is usually present on LPAR only.
562 The driver creates a device /dev/chsc, which may be used to
563 obtain I/O configuration information about the machine and
564 to issue asynchronous chsc commands (DANGEROUS).
565 You will usually only want to use this interface on a special
566 LPAR designated for system management.
567
568 To compile this driver as a module, choose M here: the
569 module will be called chsc_sch.
570
571 If unsure, say N.
572
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200573config SCM_BUS
574 def_bool y
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200575 prompt "SCM bus driver"
576 help
577 Bus driver for Storage Class Memory.
578
Sebastian Otteadb86a2012-08-28 16:48:16 +0200579config EADM_SCH
580 def_tristate m
581 prompt "Support for EADM subchannels"
582 depends on SCM_BUS
583 help
584 This driver allows usage of EADM subchannels. EADM subchannels act
585 as a communication vehicle for SCM increments.
586
587 To compile this driver as a module, choose M here: the
588 module will be called eadm_sch.
589
Jan Glauber843c48f2012-08-27 10:55:18 +0200590endmenu
591
592menu "Dump support"
593
594config CRASH_DUMP
595 bool "kernel crash dumps"
Heiko Carstens5a798592015-02-12 13:08:27 +0100596 depends on SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200597 select KEXEC
598 help
599 Generate crash dump after being started by kexec.
600 Crash dump kernels are loaded in the main kernel with kexec-tools
601 into a specially reserved region and then later executed after
602 a crash by kdump/kexec.
Jan Glauber843c48f2012-08-27 10:55:18 +0200603 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
Michael Holzheubf28a592014-04-14 10:38:05 +0200604 This option also enables s390 zfcpdump.
605 See also <file:Documentation/s390/zfcpdump.txt>
Jan Glauber843c48f2012-08-27 10:55:18 +0200606
607endmenu
608
609menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611source "fs/Kconfig.binfmt"
612
Jan Glauber843c48f2012-08-27 10:55:18 +0200613config SECCOMP
614 def_bool y
615 prompt "Enable seccomp to safely compute untrusted bytecode"
616 depends on PROC_FS
617 help
618 This kernel feature is useful for number crunching applications
619 that may need to compute untrusted bytecode during their
620 execution. By using pipes or other transports made available to
621 the process as file descriptors supporting the read/write
622 syscalls, it's possible to isolate those applications in
623 their own address space using seccomp. Once seccomp is
624 enabled via /proc/<pid>/seccomp, it cannot be disabled
625 and the task is only allowed to execute a few safe syscalls
626 defined by each seccomp mode.
627
628 If unsure, say Y.
629
630endmenu
631
632menu "Power Management"
633
634config ARCH_HIBERNATION_POSSIBLE
Heiko Carstens5a798592015-02-12 13:08:27 +0100635 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200636
637source "kernel/power/Kconfig"
638
639endmenu
640
641source "net/Kconfig"
642
643config PCMCIA
644 def_bool n
645
646config CCW
647 def_bool y
648
649source "drivers/Kconfig"
650
651source "fs/Kconfig"
652
653source "arch/s390/Kconfig.debug"
654
655source "security/Kconfig"
656
657source "crypto/Kconfig"
658
659source "lib/Kconfig"
660
661menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100662
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100664 def_bool y
665 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 help
667 Select this option, if you want to use PFAULT pseudo page fault
668 handling under VM. If running native or in LPAR, this option
669 has no effect. If your VM does not support PFAULT, PAGEEX
670 pseudo page fault handling will be used.
671 Note that VM 4.2 supports PFAULT but has a bug in its
672 implementation that causes some problems.
673 Everybody who wants to run Linux under VM != VM4.2 should select
674 this option.
675
676config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200677 bool "VM shared kernel support"
678 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 help
680 Select this option, if you want to share the text segment of the
681 Linux kernel between different VM guests. This reduces memory
682 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100683 Also if a kernel was IPL'ed from a shared segment the kexec system
684 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 You should only select this option if you know what you are
686 doing and want to exploit this feature.
687
688config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100689 def_tristate n
690 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 help
692 Select this option, if you want to enable the kernel interface
693 to reduce the memory size of the system. This is accomplished
694 by allocating pages of memory and put them "on hold". This only
695 makes sense for a system running under VM where the unused pages
696 will be reused by VM for other guest systems. The interface
697 allows an external monitor to balance memory of many systems.
698 Everybody who wants to run Linux under VM should select this
699 option.
700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100702 def_bool y
703 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
705 help
706 Select this option to enable the special message interface to
707 the cooperative memory management.
708
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100710 def_bool n
711 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100712 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713 help
714 This provides a kernel interface for creating and updating z/VM APPLDATA
715 monitor records. The monitor records are updated at certain time
716 intervals, once the timer is started.
717 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
718 i.e. enables or disables monitoring on the Linux side.
719 A custom interval value (in seconds) can be written to
720 /proc/appldata/interval.
721
722 Defaults are 60 seconds interval and timer off.
723 The /proc entries can also be read from, showing the current settings.
724
725config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100726 def_tristate m
727 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800728 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 help
730 This provides memory management related data to the Linux - VM Monitor
731 Stream, like paging/swapping rate, memory utilisation, etc.
732 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
733 APPLDATA monitor record, i.e. enables or disables monitoring this record
734 on the z/VM side.
735
736 Default is disabled.
737 The /proc entry can also be read from, showing the current settings.
738
739 This can also be compiled as a module, which will be called
740 appldata_mem.o.
741
742config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100743 def_tristate m
744 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 depends on APPLDATA_BASE
746 help
747 This provides OS related data to the Linux - VM Monitor Stream, like
748 CPU utilisation, etc.
749 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
750 APPLDATA monitor record, i.e. enables or disables monitoring this record
751 on the z/VM side.
752
753 Default is disabled.
754 This can also be compiled as a module, which will be called
755 appldata_os.o.
756
757config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100758 def_tristate m
759 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100760 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 help
762 This provides network related data to the Linux - VM Monitor Stream,
763 currently there is only a total sum of network I/O statistics, no
764 per-interface data.
765 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
766 APPLDATA monitor record, i.e. enables or disables monitoring this record
767 on the z/VM side.
768
769 Default is disabled.
770 This can also be compiled as a module, which will be called
771 appldata_net_sum.o.
772
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700773config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100774 def_bool y
775 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700776 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700777 help
778 This is a virtual file system intended to provide accounting
779 information in an s390 hypervisor environment.
780
Jan Glauber843c48f2012-08-27 10:55:18 +0200781source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200782
Carsten Ottefa587742008-03-25 18:47:44 +0100783config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100784 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700785 prompt "s390 support for virtio devices"
Chen Gang79b6f7f2013-07-23 16:26:08 +0800786 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200787 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100788 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200789 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100790 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200791 Enabling this option adds support for virtio based paravirtual device
792 drivers on s390.
793
Christian Borntraeger20766c02008-08-29 13:30:56 +0200794 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200795 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200796
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797endmenu