blob: d239e6afb9238ea6f073ec1cfd330ea6af2a3fe4 [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
38 def_bool 64BIT
39
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
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -080061config S390
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020062 def_bool y
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010063 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Heiko Carstens93bead42013-09-06 10:03:30 +020064 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010065 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Thomas Gleixner6beb0002009-11-09 15:21:34 +000066 select ARCH_INLINE_READ_LOCK
67 select ARCH_INLINE_READ_LOCK_BH
68 select ARCH_INLINE_READ_LOCK_IRQ
69 select ARCH_INLINE_READ_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010070 select ARCH_INLINE_READ_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000071 select ARCH_INLINE_READ_UNLOCK
72 select ARCH_INLINE_READ_UNLOCK_BH
73 select ARCH_INLINE_READ_UNLOCK_IRQ
74 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010075 select ARCH_INLINE_SPIN_LOCK
76 select ARCH_INLINE_SPIN_LOCK_BH
77 select ARCH_INLINE_SPIN_LOCK_IRQ
78 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
79 select ARCH_INLINE_SPIN_TRYLOCK
80 select ARCH_INLINE_SPIN_TRYLOCK_BH
81 select ARCH_INLINE_SPIN_UNLOCK
82 select ARCH_INLINE_SPIN_UNLOCK_BH
83 select ARCH_INLINE_SPIN_UNLOCK_IRQ
84 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
Thomas Gleixner6beb0002009-11-09 15:21:34 +000085 select ARCH_INLINE_WRITE_LOCK
86 select ARCH_INLINE_WRITE_LOCK_BH
87 select ARCH_INLINE_WRITE_LOCK_IRQ
88 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010089 select ARCH_INLINE_WRITE_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000090 select ARCH_INLINE_WRITE_UNLOCK
91 select ARCH_INLINE_WRITE_UNLOCK_BH
92 select ARCH_INLINE_WRITE_UNLOCK_IRQ
93 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010094 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
Heiko Carstensefc1d232013-09-05 13:26:17 +020095 select ARCH_USE_CMPXCHG_LOCKREF
Will Deaconc1d7e012012-07-30 14:42:46 -070096 select ARCH_WANT_IPC_PARSE_VERSION
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010097 select BUILDTIME_EXTABLE_SORT
98 select CLONE_BACKWARDS2
99 select GENERIC_CLOCKEVENTS
100 select GENERIC_CPU_DEVICES if !SMP
Heiko Carstens746479c2013-09-18 11:45:36 +0200101 select GENERIC_FIND_FIRST_BIT
Thomas Gleixnere80e7812012-04-20 13:05:52 +0000102 select GENERIC_SMP_IDLE_THREAD
Martin Schwidefsky79c74ec2013-11-22 10:04:53 +0100103 select GENERIC_TIME_VSYSCALL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100104 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
AKASHI Takahiro7a017722014-02-25 18:16:24 +0900105 select HAVE_ARCH_AUDITSYSCALL
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100106 select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
Heiko Carstensc63cb462012-07-31 15:37:13 +0200107 select HAVE_ARCH_SECCOMP_FILTER
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100108 select HAVE_ARCH_TRACEHOOK
109 select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
110 select HAVE_BPF_JIT if 64BIT && PACK_STACK
111 select HAVE_CMPXCHG_DOUBLE
112 select HAVE_CMPXCHG_LOCAL
113 select HAVE_C_RECORDMCOUNT
114 select HAVE_DEBUG_KMEMLEAK
115 select HAVE_DYNAMIC_FTRACE
116 select HAVE_FTRACE_MCOUNT_RECORD
117 select HAVE_FUNCTION_GRAPH_TRACER
118 select HAVE_FUNCTION_TRACER
119 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
Heiko Carstens03b8c7b2014-03-02 13:09:47 +0100120 select HAVE_FUTEX_CMPXCHG if FUTEX
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100121 select HAVE_KERNEL_BZIP2
122 select HAVE_KERNEL_GZIP
Heiko Carstens8e2872c2013-07-18 15:18:24 +0200123 select HAVE_KERNEL_LZ4
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100124 select HAVE_KERNEL_LZMA
125 select HAVE_KERNEL_LZO
126 select HAVE_KERNEL_XZ
127 select HAVE_KPROBES
128 select HAVE_KRETPROBES
129 select HAVE_KVM if 64BIT
130 select HAVE_MEMBLOCK
131 select HAVE_MEMBLOCK_NODE_MAP
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100132 select HAVE_MEMBLOCK_PHYS_MAP
David Howells786d35d2012-09-28 14:31:03 +0930133 select HAVE_MOD_ARCH_SPECIFIC
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100134 select HAVE_OPROFILE
135 select HAVE_PERF_EVENTS
136 select HAVE_REGS_AND_STACK_ACCESS_API
137 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100138 select HAVE_UID16 if 32BIT
139 select HAVE_VIRT_CPU_ACCOUNTING
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100140 select KTIME_SCALAR if 32BIT
David Howells786d35d2012-09-28 14:31:03 +0930141 select MODULES_USE_ELF_RELA
Philipp Hachtmann50be6342014-01-29 18:16:01 +0100142 select NO_BOOTMEM
Al Viro7eddd992012-12-25 19:26:12 -0500143 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200144 select OLD_SIGSUSPEND3
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100145 select SYSCTL_EXCEPTION_TRACE
Josh Triplett05634162014-02-26 18:13:06 -0800146 select TTY
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100147 select VIRT_CPU_ACCOUNTING
Heiko Carstens93bead42013-09-06 10:03:30 +0200148 select VIRT_TO_BUS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200150config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100151 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200152
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153source "init/Kconfig"
154
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700155source "kernel/Kconfig.freezer"
156
Jan Glauber843c48f2012-08-27 10:55:18 +0200157menu "Processor type and features"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Jan Glauber843c48f2012-08-27 10:55:18 +0200159config HAVE_MARCH_Z900_FEATURES
160 def_bool n
161
162config HAVE_MARCH_Z990_FEATURES
163 def_bool n
164 select HAVE_MARCH_Z900_FEATURES
165
166config HAVE_MARCH_Z9_109_FEATURES
167 def_bool n
168 select HAVE_MARCH_Z990_FEATURES
169
170config HAVE_MARCH_Z10_FEATURES
171 def_bool n
172 select HAVE_MARCH_Z9_109_FEATURES
173
174config HAVE_MARCH_Z196_FEATURES
175 def_bool n
176 select HAVE_MARCH_Z10_FEATURES
177
Heiko Carstens991c15052012-11-13 10:26:37 +0200178config HAVE_MARCH_ZEC12_FEATURES
179 def_bool n
180 select HAVE_MARCH_Z196_FEATURES
181
Jan Glauber843c48f2012-08-27 10:55:18 +0200182choice
183 prompt "Processor type"
184 default MARCH_G5
185
186config MARCH_G5
187 bool "System/390 model G5 and G6"
188 depends on !64BIT
189 help
190 Select this to build a 31 bit kernel that works
191 on all ESA/390 and z/Architecture machines.
192
193config MARCH_Z900
194 bool "IBM zSeries model z800 and z900"
195 select HAVE_MARCH_Z900_FEATURES if 64BIT
196 help
197 Select this to enable optimizations for model z800/z900 (2064 and
198 2066 series). This will enable some optimizations that are not
199 available on older ESA/390 (31 Bit) only CPUs.
200
201config MARCH_Z990
202 bool "IBM zSeries model z890 and z990"
203 select HAVE_MARCH_Z990_FEATURES if 64BIT
204 help
205 Select this to enable optimizations for model z890/z990 (2084 and
206 2086 series). The kernel will be slightly faster but will not work
207 on older machines.
208
209config MARCH_Z9_109
210 bool "IBM System z9"
211 select HAVE_MARCH_Z9_109_FEATURES if 64BIT
212 help
213 Select this to enable optimizations for IBM System z9 (2094 and
214 2096 series). The kernel will be slightly faster but will not work
215 on older machines.
216
217config MARCH_Z10
218 bool "IBM System z10"
219 select HAVE_MARCH_Z10_FEATURES if 64BIT
220 help
221 Select this to enable optimizations for IBM System z10 (2097 and
222 2098 series). The kernel will be slightly faster but will not work
223 on older machines.
224
225config MARCH_Z196
226 bool "IBM zEnterprise 114 and 196"
227 select HAVE_MARCH_Z196_FEATURES if 64BIT
228 help
229 Select this to enable optimizations for IBM zEnterprise 114 and 196
230 (2818 and 2817 series). The kernel will be slightly faster but will
231 not work on older machines.
232
Heiko Carstens991c15052012-11-13 10:26:37 +0200233config MARCH_ZEC12
Heiko Carstens59471222013-07-24 10:35:33 +0200234 bool "IBM zBC12 and zEC12"
Heiko Carstens991c15052012-11-13 10:26:37 +0200235 select HAVE_MARCH_ZEC12_FEATURES if 64BIT
236 help
Heiko Carstens59471222013-07-24 10:35:33 +0200237 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
238 2827 series). The kernel will be slightly faster but will not work on
239 older machines.
Heiko Carstens991c15052012-11-13 10:26:37 +0200240
Jan Glauber843c48f2012-08-27 10:55:18 +0200241endchoice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Heiko Carstens1db9e052013-10-30 12:12:50 +0100243config MARCH_G5_TUNE
244 def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT
245
246config MARCH_Z900_TUNE
247 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
248
249config MARCH_Z990_TUNE
250 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
251
252config MARCH_Z9_109_TUNE
253 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
254
255config MARCH_Z10_TUNE
256 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
257
258config MARCH_Z196_TUNE
259 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
260
261config MARCH_ZEC12_TUNE
262 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
263
264choice
265 prompt "Tune code generation"
266 default TUNE_DEFAULT
267 help
268 Cause the compiler to tune (-mtune) the generated code for a machine.
269 This will make the code run faster on the selected machine but
270 somewhat slower on other machines.
271 This option only changes how the compiler emits instructions, not the
272 selection of instructions itself, so the resulting kernel will run on
273 all other machines.
274
275config TUNE_DEFAULT
276 bool "Default"
277 help
278 Tune the generated code for the target processor for which the kernel
279 will be compiled.
280
281config TUNE_G5
282 bool "System/390 model G5 and G6"
283
284config TUNE_Z900
285 bool "IBM zSeries model z800 and z900"
286
287config TUNE_Z990
288 bool "IBM zSeries model z890 and z990"
289
290config TUNE_Z9_109
291 bool "IBM System z9"
292
293config TUNE_Z10
294 bool "IBM System z10"
295
296config TUNE_Z196
297 bool "IBM zEnterprise 114 and 196"
298
299config TUNE_ZEC12
300 bool "IBM zBC12 and zEC12"
301
302endchoice
303
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800304config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100305 def_bool y
306 prompt "64 bit kernel"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200308 Select this option if you have an IBM z/Architecture machine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 and want to use the 64 bit addressing mode.
310
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200311config 32BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100312 def_bool y if !64BIT
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200313
Jan Glauber843c48f2012-08-27 10:55:18 +0200314config COMPAT
315 def_bool y
316 prompt "Kernel support for 31 bit emulation"
317 depends on 64BIT
318 select COMPAT_BINFMT_ELF if BINFMT_ELF
319 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro7eddd992012-12-25 19:26:12 -0500320 select COMPAT_OLD_SIGACTION
Jan Glauber843c48f2012-08-27 10:55:18 +0200321 help
322 Select this option if you want to enable your system kernel to
323 handle system-calls from ELF binaries for 31 bit ESA. This option
324 (and some other stuff like libraries and such) is needed for
325 executing 31 bit applications. It is safe to say "Y".
326
327config SYSVIPC_COMPAT
328 def_bool y if COMPAT && SYSVIPC
329
330config KEYS_COMPAT
331 def_bool y if COMPAT && KEYS
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100334 def_bool y
335 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 ---help---
337 This enables support for systems with more than one CPU. If you have
338 a system with only one CPU, like most personal computers, say N. If
339 you have a system with more than one CPU, say Y.
340
Robert Graffham4a474152014-01-23 15:55:29 -0800341 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 machines, but will use only one CPU of a multiprocessor machine. If
343 you say Y here, the kernel will run on many, but not all,
Robert Graffham4a474152014-01-23 15:55:29 -0800344 uniprocessor machines. On a uniprocessor machine, the kernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 will run faster if you say N here.
346
Adrian Bunk03502fa2008-02-03 15:50:21 +0200347 See also the SMP-HOWTO available at
348 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350 Even if you don't know what to do here, say Y.
351
352config NR_CPUS
Xose Vazquez Perez8cb04be2013-11-29 16:33:02 +0100353 int "Maximum number of CPUs (2-256)"
354 range 2 256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 depends on SMP
Heiko Carstens057c5cb2008-02-19 15:29:25 +0100356 default "32" if !64BIT
357 default "64" if 64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 help
359 This allows you to specify the maximum number of CPUs which this
Xose Vazquez Perez8cb04be2013-11-29 16:33:02 +0100360 kernel will support. The maximum supported value is 256 and the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 minimum value which makes sense is 2.
362
363 This is purely to save memory - each supported CPU adds
364 approximately sixteen kilobytes to the kernel image.
365
366config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100367 def_bool y
368 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 depends on SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 help
371 Say Y here to be able to turn CPUs off and on. CPUs
372 can be controlled through /sys/devices/system/cpu/cpu#.
373 Say N if you want to disable CPU hotplug.
374
Heiko Carstens8d11e022010-10-29 16:50:37 +0200375config SCHED_MC
Heiko Carstens83a24e32011-12-27 11:27:09 +0100376 def_bool n
Heiko Carstens8d11e022010-10-29 16:50:37 +0200377
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200378config SCHED_BOOK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100379 def_bool y
380 prompt "Book scheduler support"
Heiko Carstens83a24e32011-12-27 11:27:09 +0100381 depends on SMP
382 select SCHED_MC
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200383 help
384 Book scheduler support improves the CPU scheduler's decision making
385 when dealing with machines that have several books.
386
Jan Glauber843c48f2012-08-27 10:55:18 +0200387source kernel/Kconfig.preempt
388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389config MATHEMU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100390 def_bool y
391 prompt "IEEE FPU emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 depends on MARCH_G5
393 help
394 This option is required for IEEE compliant floating point arithmetic
Heiko Carstensdb81a232010-10-29 16:50:36 +0200395 on older ESA/390 machines. Say Y unless you know your machine doesn't
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 need this.
397
Jan Glauber843c48f2012-08-27 10:55:18 +0200398source kernel/Kconfig.hz
399
400endmenu
401
402menu "Memory setup"
403
404config ARCH_SPARSEMEM_ENABLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100405 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200406 select SPARSEMEM_VMEMMAP_ENABLE
407 select SPARSEMEM_VMEMMAP
408 select SPARSEMEM_STATIC if !64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Jan Glauber843c48f2012-08-27 10:55:18 +0200410config ARCH_SPARSEMEM_DEFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100411 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400412
Jan Glauber843c48f2012-08-27 10:55:18 +0200413config ARCH_SELECT_MEMORY_MODEL
414 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200415
Jan Glauber843c48f2012-08-27 10:55:18 +0200416config ARCH_ENABLE_MEMORY_HOTPLUG
417 def_bool y if SPARSEMEM
Heiko Carstens05445162012-05-14 10:12:41 +0200418
Jan Glauber843c48f2012-08-27 10:55:18 +0200419config ARCH_ENABLE_MEMORY_HOTREMOVE
420 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200421
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100422config ARCH_ENABLE_SPLIT_PMD_PTLOCK
423 def_bool y
424 depends on 64BIT
425
Jan Glauber843c48f2012-08-27 10:55:18 +0200426config FORCE_MAX_ZONEORDER
427 int
428 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200429
Jan Glauber843c48f2012-08-27 10:55:18 +0200430source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
432config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100433 def_bool y
434 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 help
436 This option enables the compiler option -mkernel-backchain if it
437 is available. If the option is available the compiler supports
438 the new stack layout which dramatically reduces the minimum stack
439 frame size. With an old compiler a non-leaf function needs a
440 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
441 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
442 and 24 byte on 64 bit.
443
444 Say Y if you are unsure.
445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100447 def_bool y
448 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 help
450 This option enables the compiler option -mstack-guard and
451 -mstack-size if they are available. If the compiler supports them
452 it will emit additional code to each function prolog to trigger
453 an illegal operation if the kernel stack is about to overflow.
454
455 Say N if you are unsure.
456
457config STACK_GUARD
458 int "Size of the guard area (128-1024)"
459 range 128 1024
460 depends on CHECK_STACK
461 default "256"
462 help
463 This allows you to specify the size of the guard area at the lower
464 end of the kernel stack. If the kernel stack points into the guard
465 area on function entry an illegal operation is triggered. The size
466 needs to be a power of 2. Please keep in mind that the size of an
467 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
468 The minimum size for the stack guard should be 256 for 31 bit and
469 512 for 64 bit.
470
Jan Glauber2c190da2011-03-15 17:08:19 +0100471config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100472 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100473 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100475 This option enables the compiler option -mwarn-dynamicstack. If the
476 compiler supports this options generates warnings for functions
477 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
479 Say N if you are unsure.
480
Jan Glauber843c48f2012-08-27 10:55:18 +0200481endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200482
Jan Glauber843c48f2012-08-27 10:55:18 +0200483menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100486 def_tristate y
487 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800489 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200490 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
492 To compile this driver as a module, choose M here: the
493 module will be called qdio.
494
495 If unsure, say Y.
496
Jan Glauberc8717a32012-11-29 14:38:46 +0100497menuconfig PCI
498 bool "PCI support"
499 default n
500 depends on 64BIT
Jan Glauberc8717a32012-11-29 14:38:46 +0100501 select PCI_MSI
502 help
503 Enable PCI support.
504
505if PCI
506
507config PCI_NR_FUNCTIONS
508 int "Maximum number of PCI functions (1-4096)"
509 range 1 4096
510 default "64"
511 help
512 This allows you to specify the maximum number of PCI functions which
513 this kernel will support.
514
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200515config PCI_NR_MSI
516 int "Maximum number of MSI interrupts (64-32768)"
517 range 64 32768
518 default "256"
519 help
520 This defines the number of virtual interrupts the kernel will
521 provide for MSI interrupts. If you configure your system to have
522 too few drivers will fail to allocate MSI interrupts for all
523 PCI devices.
524
Jan Glauberc8717a32012-11-29 14:38:46 +0100525source "drivers/pci/Kconfig"
526source "drivers/pci/pcie/Kconfig"
527source "drivers/pci/hotplug/Kconfig"
528
529endif # PCI
530
531config PCI_DOMAINS
532 def_bool PCI
533
534config HAS_IOMEM
535 def_bool PCI
536
537config IOMMU_HELPER
538 def_bool PCI
539
540config HAS_DMA
541 def_bool PCI
542 select HAVE_DMA_API_DEBUG
543
544config NEED_SG_DMA_LENGTH
545 def_bool PCI
546
547config HAVE_DMA_ATTRS
548 def_bool PCI
549
Jan Glauber91630032012-12-05 15:06:01 +0100550config NEED_DMA_MAP_STATE
551 def_bool PCI
552
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200553config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100554 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100555 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200556 help
557 This driver allows usage of CHSC subchannels. A CHSC subchannel
558 is usually present on LPAR only.
559 The driver creates a device /dev/chsc, which may be used to
560 obtain I/O configuration information about the machine and
561 to issue asynchronous chsc commands (DANGEROUS).
562 You will usually only want to use this interface on a special
563 LPAR designated for system management.
564
565 To compile this driver as a module, choose M here: the
566 module will be called chsc_sch.
567
568 If unsure, say N.
569
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200570config SCM_BUS
571 def_bool y
572 depends on 64BIT
573 prompt "SCM bus driver"
574 help
575 Bus driver for Storage Class Memory.
576
Sebastian Otteadb86a2012-08-28 16:48:16 +0200577config EADM_SCH
578 def_tristate m
579 prompt "Support for EADM subchannels"
580 depends on SCM_BUS
581 help
582 This driver allows usage of EADM subchannels. EADM subchannels act
583 as a communication vehicle for SCM increments.
584
585 To compile this driver as a module, choose M here: the
586 module will be called eadm_sch.
587
Jan Glauber843c48f2012-08-27 10:55:18 +0200588endmenu
589
590menu "Dump support"
591
592config CRASH_DUMP
593 bool "kernel crash dumps"
594 depends on 64BIT && SMP
595 select KEXEC
Michael Holzheu6f79d332013-09-11 14:24:54 -0700596 select ZFCPDUMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200597 help
598 Generate crash dump after being started by kexec.
599 Crash dump kernels are loaded in the main kernel with kexec-tools
600 into a specially reserved region and then later executed after
601 a crash by kdump/kexec.
602 For more details see Documentation/kdump/kdump.txt
603
604config ZFCPDUMP
605 def_bool n
606 prompt "zfcpdump support"
Heiko Carstens05e91812014-01-21 14:08:38 +0100607 depends on 64BIT && SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200608 help
609 Select this option if you want to build an zfcpdump enabled kernel.
610 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
611
612endmenu
613
614menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616source "fs/Kconfig.binfmt"
617
Jan Glauber843c48f2012-08-27 10:55:18 +0200618config SECCOMP
619 def_bool y
620 prompt "Enable seccomp to safely compute untrusted bytecode"
621 depends on PROC_FS
622 help
623 This kernel feature is useful for number crunching applications
624 that may need to compute untrusted bytecode during their
625 execution. By using pipes or other transports made available to
626 the process as file descriptors supporting the read/write
627 syscalls, it's possible to isolate those applications in
628 their own address space using seccomp. Once seccomp is
629 enabled via /proc/<pid>/seccomp, it cannot be disabled
630 and the task is only allowed to execute a few safe syscalls
631 defined by each seccomp mode.
632
633 If unsure, say Y.
634
635endmenu
636
637menu "Power Management"
638
639config ARCH_HIBERNATION_POSSIBLE
640 def_bool y if 64BIT
641
642source "kernel/power/Kconfig"
643
644endmenu
645
646source "net/Kconfig"
647
648config PCMCIA
649 def_bool n
650
651config CCW
652 def_bool y
653
654source "drivers/Kconfig"
655
656source "fs/Kconfig"
657
658source "arch/s390/Kconfig.debug"
659
660source "security/Kconfig"
661
662source "crypto/Kconfig"
663
664source "lib/Kconfig"
665
666menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100667
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100669 def_bool y
670 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 help
672 Select this option, if you want to use PFAULT pseudo page fault
673 handling under VM. If running native or in LPAR, this option
674 has no effect. If your VM does not support PFAULT, PAGEEX
675 pseudo page fault handling will be used.
676 Note that VM 4.2 supports PFAULT but has a bug in its
677 implementation that causes some problems.
678 Everybody who wants to run Linux under VM != VM4.2 should select
679 this option.
680
681config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200682 bool "VM shared kernel support"
683 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684 help
685 Select this option, if you want to share the text segment of the
686 Linux kernel between different VM guests. This reduces memory
687 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100688 Also if a kernel was IPL'ed from a shared segment the kexec system
689 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690 You should only select this option if you know what you are
691 doing and want to exploit this feature.
692
693config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100694 def_tristate n
695 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 help
697 Select this option, if you want to enable the kernel interface
698 to reduce the memory size of the system. This is accomplished
699 by allocating pages of memory and put them "on hold". This only
700 makes sense for a system running under VM where the unused pages
701 will be reused by VM for other guest systems. The interface
702 allows an external monitor to balance memory of many systems.
703 Everybody who wants to run Linux under VM should select this
704 option.
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100707 def_bool y
708 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
710 help
711 Select this option to enable the special message interface to
712 the cooperative memory management.
713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100715 def_bool n
716 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100717 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 help
719 This provides a kernel interface for creating and updating z/VM APPLDATA
720 monitor records. The monitor records are updated at certain time
721 intervals, once the timer is started.
722 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
723 i.e. enables or disables monitoring on the Linux side.
724 A custom interval value (in seconds) can be written to
725 /proc/appldata/interval.
726
727 Defaults are 60 seconds interval and timer off.
728 The /proc entries can also be read from, showing the current settings.
729
730config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100731 def_tristate m
732 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800733 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700734 help
735 This provides memory management related data to the Linux - VM Monitor
736 Stream, like paging/swapping rate, memory utilisation, etc.
737 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
738 APPLDATA monitor record, i.e. enables or disables monitoring this record
739 on the z/VM side.
740
741 Default is disabled.
742 The /proc entry can also be read from, showing the current settings.
743
744 This can also be compiled as a module, which will be called
745 appldata_mem.o.
746
747config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100748 def_tristate m
749 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 depends on APPLDATA_BASE
751 help
752 This provides OS related data to the Linux - VM Monitor Stream, like
753 CPU utilisation, etc.
754 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
755 APPLDATA monitor record, i.e. enables or disables monitoring this record
756 on the z/VM side.
757
758 Default is disabled.
759 This can also be compiled as a module, which will be called
760 appldata_os.o.
761
762config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100763 def_tristate m
764 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100765 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 help
767 This provides network related data to the Linux - VM Monitor Stream,
768 currently there is only a total sum of network I/O statistics, no
769 per-interface data.
770 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
771 APPLDATA monitor record, i.e. enables or disables monitoring this record
772 on the z/VM side.
773
774 Default is disabled.
775 This can also be compiled as a module, which will be called
776 appldata_net_sum.o.
777
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700778config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100779 def_bool y
780 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700781 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700782 help
783 This is a virtual file system intended to provide accounting
784 information in an s390 hypervisor environment.
785
Jan Glauber843c48f2012-08-27 10:55:18 +0200786source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200787
Carsten Ottefa587742008-03-25 18:47:44 +0100788config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100789 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700790 prompt "s390 support for virtio devices"
791 depends on 64BIT
Chen Gang79b6f7f2013-07-23 16:26:08 +0800792 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200793 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100794 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200795 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100796 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200797 Enabling this option adds support for virtio based paravirtual device
798 drivers on s390.
799
Christian Borntraeger20766c02008-08-29 13:30:56 +0200800 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200801 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200802
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803endmenu