blob: 314fced4fc14a50f2785d273c87fd590d241e9da [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
Jan Glauberc8717a32012-11-29 14:38:46 +010055config NO_IOPORT
56 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
Tejun Heoff38df32011-12-08 10:22:09 -080063 select ARCH_DISCARD_MEMBLOCK
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010064 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Heiko Carstens93bead42013-09-06 10:03:30 +020065 select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010066 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Thomas Gleixner6beb0002009-11-09 15:21:34 +000067 select ARCH_INLINE_READ_LOCK
68 select ARCH_INLINE_READ_LOCK_BH
69 select ARCH_INLINE_READ_LOCK_IRQ
70 select ARCH_INLINE_READ_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010071 select ARCH_INLINE_READ_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000072 select ARCH_INLINE_READ_UNLOCK
73 select ARCH_INLINE_READ_UNLOCK_BH
74 select ARCH_INLINE_READ_UNLOCK_IRQ
75 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010076 select ARCH_INLINE_SPIN_LOCK
77 select ARCH_INLINE_SPIN_LOCK_BH
78 select ARCH_INLINE_SPIN_LOCK_IRQ
79 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
80 select ARCH_INLINE_SPIN_TRYLOCK
81 select ARCH_INLINE_SPIN_TRYLOCK_BH
82 select ARCH_INLINE_SPIN_UNLOCK
83 select ARCH_INLINE_SPIN_UNLOCK_BH
84 select ARCH_INLINE_SPIN_UNLOCK_IRQ
85 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
Thomas Gleixner6beb0002009-11-09 15:21:34 +000086 select ARCH_INLINE_WRITE_LOCK
87 select ARCH_INLINE_WRITE_LOCK_BH
88 select ARCH_INLINE_WRITE_LOCK_IRQ
89 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010090 select ARCH_INLINE_WRITE_TRYLOCK
Thomas Gleixner6beb0002009-11-09 15:21:34 +000091 select ARCH_INLINE_WRITE_UNLOCK
92 select ARCH_INLINE_WRITE_UNLOCK_BH
93 select ARCH_INLINE_WRITE_UNLOCK_IRQ
94 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010095 select ARCH_SAVE_PAGE_KEYS if HIBERNATION
Heiko Carstensefc1d232013-09-05 13:26:17 +020096 select ARCH_USE_CMPXCHG_LOCKREF
Will Deaconc1d7e012012-07-30 14:42:46 -070097 select ARCH_WANT_IPC_PARSE_VERSION
Heiko Carstens0e0d04a2013-02-06 10:15:55 +010098 select BUILDTIME_EXTABLE_SORT
99 select CLONE_BACKWARDS2
100 select GENERIC_CLOCKEVENTS
101 select GENERIC_CPU_DEVICES if !SMP
Heiko Carstens746479c2013-09-18 11:45:36 +0200102 select GENERIC_FIND_FIRST_BIT
Thomas Gleixnere80e7812012-04-20 13:05:52 +0000103 select GENERIC_SMP_IDLE_THREAD
John Stultz70639422012-09-04 15:34:21 -0400104 select GENERIC_TIME_VSYSCALL_OLD
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100105 select HAVE_ALIGNED_STRUCT_PAGE if SLUB
106 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 Carstens0e0d04a2013-02-06 10:15:55 +0100120 select HAVE_KERNEL_BZIP2
121 select HAVE_KERNEL_GZIP
Heiko Carstens8e2872c2013-07-18 15:18:24 +0200122 select HAVE_KERNEL_LZ4
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100123 select HAVE_KERNEL_LZMA
124 select HAVE_KERNEL_LZO
125 select HAVE_KERNEL_XZ
126 select HAVE_KPROBES
127 select HAVE_KRETPROBES
128 select HAVE_KVM if 64BIT
129 select HAVE_MEMBLOCK
130 select HAVE_MEMBLOCK_NODE_MAP
David Howells786d35d2012-09-28 14:31:03 +0930131 select HAVE_MOD_ARCH_SPECIFIC
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100132 select HAVE_OPROFILE
133 select HAVE_PERF_EVENTS
134 select HAVE_REGS_AND_STACK_ACCESS_API
135 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100136 select HAVE_UID16 if 32BIT
137 select HAVE_VIRT_CPU_ACCOUNTING
138 select INIT_ALL_POSSIBLE
139 select KTIME_SCALAR if 32BIT
David Howells786d35d2012-09-28 14:31:03 +0930140 select MODULES_USE_ELF_RELA
Al Viro7eddd992012-12-25 19:26:12 -0500141 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200142 select OLD_SIGSUSPEND3
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100143 select SYSCTL_EXCEPTION_TRACE
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100144 select VIRT_CPU_ACCOUNTING
Heiko Carstens93bead42013-09-06 10:03:30 +0200145 select VIRT_TO_BUS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200147config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100148 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200149
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150source "init/Kconfig"
151
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700152source "kernel/Kconfig.freezer"
153
Jan Glauber843c48f2012-08-27 10:55:18 +0200154menu "Processor type and features"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
Jan Glauber843c48f2012-08-27 10:55:18 +0200156config HAVE_MARCH_Z900_FEATURES
157 def_bool n
158
159config HAVE_MARCH_Z990_FEATURES
160 def_bool n
161 select HAVE_MARCH_Z900_FEATURES
162
163config HAVE_MARCH_Z9_109_FEATURES
164 def_bool n
165 select HAVE_MARCH_Z990_FEATURES
166
167config HAVE_MARCH_Z10_FEATURES
168 def_bool n
169 select HAVE_MARCH_Z9_109_FEATURES
170
171config HAVE_MARCH_Z196_FEATURES
172 def_bool n
173 select HAVE_MARCH_Z10_FEATURES
174
Heiko Carstens991c15052012-11-13 10:26:37 +0200175config HAVE_MARCH_ZEC12_FEATURES
176 def_bool n
177 select HAVE_MARCH_Z196_FEATURES
178
Jan Glauber843c48f2012-08-27 10:55:18 +0200179choice
180 prompt "Processor type"
181 default MARCH_G5
182
183config MARCH_G5
184 bool "System/390 model G5 and G6"
185 depends on !64BIT
186 help
187 Select this to build a 31 bit kernel that works
188 on all ESA/390 and z/Architecture machines.
189
190config MARCH_Z900
191 bool "IBM zSeries model z800 and z900"
192 select HAVE_MARCH_Z900_FEATURES if 64BIT
193 help
194 Select this to enable optimizations for model z800/z900 (2064 and
195 2066 series). This will enable some optimizations that are not
196 available on older ESA/390 (31 Bit) only CPUs.
197
198config MARCH_Z990
199 bool "IBM zSeries model z890 and z990"
200 select HAVE_MARCH_Z990_FEATURES if 64BIT
201 help
202 Select this to enable optimizations for model z890/z990 (2084 and
203 2086 series). The kernel will be slightly faster but will not work
204 on older machines.
205
206config MARCH_Z9_109
207 bool "IBM System z9"
208 select HAVE_MARCH_Z9_109_FEATURES if 64BIT
209 help
210 Select this to enable optimizations for IBM System z9 (2094 and
211 2096 series). The kernel will be slightly faster but will not work
212 on older machines.
213
214config MARCH_Z10
215 bool "IBM System z10"
216 select HAVE_MARCH_Z10_FEATURES if 64BIT
217 help
218 Select this to enable optimizations for IBM System z10 (2097 and
219 2098 series). The kernel will be slightly faster but will not work
220 on older machines.
221
222config MARCH_Z196
223 bool "IBM zEnterprise 114 and 196"
224 select HAVE_MARCH_Z196_FEATURES if 64BIT
225 help
226 Select this to enable optimizations for IBM zEnterprise 114 and 196
227 (2818 and 2817 series). The kernel will be slightly faster but will
228 not work on older machines.
229
Heiko Carstens991c15052012-11-13 10:26:37 +0200230config MARCH_ZEC12
Heiko Carstens59471222013-07-24 10:35:33 +0200231 bool "IBM zBC12 and zEC12"
Heiko Carstens991c15052012-11-13 10:26:37 +0200232 select HAVE_MARCH_ZEC12_FEATURES if 64BIT
233 help
Heiko Carstens59471222013-07-24 10:35:33 +0200234 Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
235 2827 series). The kernel will be slightly faster but will not work on
236 older machines.
Heiko Carstens991c15052012-11-13 10:26:37 +0200237
Jan Glauber843c48f2012-08-27 10:55:18 +0200238endchoice
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Heiko Carstens1db9e052013-10-30 12:12:50 +0100240config MARCH_G5_TUNE
241 def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT
242
243config MARCH_Z900_TUNE
244 def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
245
246config MARCH_Z990_TUNE
247 def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
248
249config MARCH_Z9_109_TUNE
250 def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
251
252config MARCH_Z10_TUNE
253 def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
254
255config MARCH_Z196_TUNE
256 def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
257
258config MARCH_ZEC12_TUNE
259 def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
260
261choice
262 prompt "Tune code generation"
263 default TUNE_DEFAULT
264 help
265 Cause the compiler to tune (-mtune) the generated code for a machine.
266 This will make the code run faster on the selected machine but
267 somewhat slower on other machines.
268 This option only changes how the compiler emits instructions, not the
269 selection of instructions itself, so the resulting kernel will run on
270 all other machines.
271
272config TUNE_DEFAULT
273 bool "Default"
274 help
275 Tune the generated code for the target processor for which the kernel
276 will be compiled.
277
278config TUNE_G5
279 bool "System/390 model G5 and G6"
280
281config TUNE_Z900
282 bool "IBM zSeries model z800 and z900"
283
284config TUNE_Z990
285 bool "IBM zSeries model z890 and z990"
286
287config TUNE_Z9_109
288 bool "IBM System z9"
289
290config TUNE_Z10
291 bool "IBM System z10"
292
293config TUNE_Z196
294 bool "IBM zEnterprise 114 and 196"
295
296config TUNE_ZEC12
297 bool "IBM zBC12 and zEC12"
298
299endchoice
300
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800301config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100302 def_bool y
303 prompt "64 bit kernel"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200305 Select this option if you have an IBM z/Architecture machine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 and want to use the 64 bit addressing mode.
307
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200308config 32BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100309 def_bool y if !64BIT
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200310
Jan Glauber843c48f2012-08-27 10:55:18 +0200311config COMPAT
312 def_bool y
313 prompt "Kernel support for 31 bit emulation"
314 depends on 64BIT
315 select COMPAT_BINFMT_ELF if BINFMT_ELF
316 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro7eddd992012-12-25 19:26:12 -0500317 select COMPAT_OLD_SIGACTION
Jan Glauber843c48f2012-08-27 10:55:18 +0200318 help
319 Select this option if you want to enable your system kernel to
320 handle system-calls from ELF binaries for 31 bit ESA. This option
321 (and some other stuff like libraries and such) is needed for
322 executing 31 bit applications. It is safe to say "Y".
323
324config SYSVIPC_COMPAT
325 def_bool y if COMPAT && SYSVIPC
326
327config KEYS_COMPAT
328 def_bool y if COMPAT && KEYS
329
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100331 def_bool y
332 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 ---help---
334 This enables support for systems with more than one CPU. If you have
335 a system with only one CPU, like most personal computers, say N. If
336 you have a system with more than one CPU, say Y.
337
338 If you say N here, the kernel will run on single and multiprocessor
339 machines, but will use only one CPU of a multiprocessor machine. If
340 you say Y here, the kernel will run on many, but not all,
341 singleprocessor machines. On a singleprocessor machine, the kernel
342 will run faster if you say N here.
343
Adrian Bunk03502fa2008-02-03 15:50:21 +0200344 See also the SMP-HOWTO available at
345 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346
347 Even if you don't know what to do here, say Y.
348
349config NR_CPUS
350 int "Maximum number of CPUs (2-64)"
351 range 2 64
352 depends on SMP
Heiko Carstens057c5cb2008-02-19 15:29:25 +0100353 default "32" if !64BIT
354 default "64" if 64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 help
356 This allows you to specify the maximum number of CPUs which this
357 kernel will support. The maximum supported value is 64 and the
358 minimum value which makes sense is 2.
359
360 This is purely to save memory - each supported CPU adds
361 approximately sixteen kilobytes to the kernel image.
362
363config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100364 def_bool y
365 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 depends on SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 help
368 Say Y here to be able to turn CPUs off and on. CPUs
369 can be controlled through /sys/devices/system/cpu/cpu#.
370 Say N if you want to disable CPU hotplug.
371
Heiko Carstens8d11e022010-10-29 16:50:37 +0200372config SCHED_MC
Heiko Carstens83a24e32011-12-27 11:27:09 +0100373 def_bool n
Heiko Carstens8d11e022010-10-29 16:50:37 +0200374
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200375config SCHED_BOOK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100376 def_bool y
377 prompt "Book scheduler support"
Heiko Carstens83a24e32011-12-27 11:27:09 +0100378 depends on SMP
379 select SCHED_MC
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200380 help
381 Book scheduler support improves the CPU scheduler's decision making
382 when dealing with machines that have several books.
383
Jan Glauber843c48f2012-08-27 10:55:18 +0200384source kernel/Kconfig.preempt
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386config MATHEMU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100387 def_bool y
388 prompt "IEEE FPU emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 depends on MARCH_G5
390 help
391 This option is required for IEEE compliant floating point arithmetic
Heiko Carstensdb81a232010-10-29 16:50:36 +0200392 on older ESA/390 machines. Say Y unless you know your machine doesn't
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 need this.
394
Jan Glauber843c48f2012-08-27 10:55:18 +0200395source kernel/Kconfig.hz
396
397endmenu
398
399menu "Memory setup"
400
401config ARCH_SPARSEMEM_ENABLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100402 def_bool y
Jan Glauber843c48f2012-08-27 10:55:18 +0200403 select SPARSEMEM_VMEMMAP_ENABLE
404 select SPARSEMEM_VMEMMAP
405 select SPARSEMEM_STATIC if !64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Jan Glauber843c48f2012-08-27 10:55:18 +0200407config ARCH_SPARSEMEM_DEFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100408 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400409
Jan Glauber843c48f2012-08-27 10:55:18 +0200410config ARCH_SELECT_MEMORY_MODEL
411 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200412
Jan Glauber843c48f2012-08-27 10:55:18 +0200413config ARCH_ENABLE_MEMORY_HOTPLUG
414 def_bool y if SPARSEMEM
Heiko Carstens05445162012-05-14 10:12:41 +0200415
Jan Glauber843c48f2012-08-27 10:55:18 +0200416config ARCH_ENABLE_MEMORY_HOTREMOVE
417 def_bool y
Heiko Carstens05445162012-05-14 10:12:41 +0200418
Jan Glauber843c48f2012-08-27 10:55:18 +0200419config FORCE_MAX_ZONEORDER
420 int
421 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200422
Jan Glauber843c48f2012-08-27 10:55:18 +0200423source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
425config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100426 def_bool y
427 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 help
429 This option enables the compiler option -mkernel-backchain if it
430 is available. If the option is available the compiler supports
431 the new stack layout which dramatically reduces the minimum stack
432 frame size. With an old compiler a non-leaf function needs a
433 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
434 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
435 and 24 byte on 64 bit.
436
437 Say Y if you are unsure.
438
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100440 def_bool y
441 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 help
443 This option enables the compiler option -mstack-guard and
444 -mstack-size if they are available. If the compiler supports them
445 it will emit additional code to each function prolog to trigger
446 an illegal operation if the kernel stack is about to overflow.
447
448 Say N if you are unsure.
449
450config STACK_GUARD
451 int "Size of the guard area (128-1024)"
452 range 128 1024
453 depends on CHECK_STACK
454 default "256"
455 help
456 This allows you to specify the size of the guard area at the lower
457 end of the kernel stack. If the kernel stack points into the guard
458 area on function entry an illegal operation is triggered. The size
459 needs to be a power of 2. Please keep in mind that the size of an
460 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
461 The minimum size for the stack guard should be 256 for 31 bit and
462 512 for 64 bit.
463
Jan Glauber2c190da2011-03-15 17:08:19 +0100464config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100465 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100466 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100468 This option enables the compiler option -mwarn-dynamicstack. If the
469 compiler supports this options generates warnings for functions
470 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
472 Say N if you are unsure.
473
Jan Glauber843c48f2012-08-27 10:55:18 +0200474endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200475
Jan Glauber843c48f2012-08-27 10:55:18 +0200476menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100479 def_tristate y
480 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800482 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200483 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
485 To compile this driver as a module, choose M here: the
486 module will be called qdio.
487
488 If unsure, say Y.
489
Jan Glauberc8717a32012-11-29 14:38:46 +0100490menuconfig PCI
491 bool "PCI support"
492 default n
493 depends on 64BIT
Jan Glauberc8717a32012-11-29 14:38:46 +0100494 select PCI_MSI
495 help
496 Enable PCI support.
497
498if PCI
499
500config PCI_NR_FUNCTIONS
501 int "Maximum number of PCI functions (1-4096)"
502 range 1 4096
503 default "64"
504 help
505 This allows you to specify the maximum number of PCI functions which
506 this kernel will support.
507
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200508config PCI_NR_MSI
509 int "Maximum number of MSI interrupts (64-32768)"
510 range 64 32768
511 default "256"
512 help
513 This defines the number of virtual interrupts the kernel will
514 provide for MSI interrupts. If you configure your system to have
515 too few drivers will fail to allocate MSI interrupts for all
516 PCI devices.
517
Jan Glauberc8717a32012-11-29 14:38:46 +0100518source "drivers/pci/Kconfig"
519source "drivers/pci/pcie/Kconfig"
520source "drivers/pci/hotplug/Kconfig"
521
522endif # PCI
523
524config PCI_DOMAINS
525 def_bool PCI
526
527config HAS_IOMEM
528 def_bool PCI
529
530config IOMMU_HELPER
531 def_bool PCI
532
533config HAS_DMA
534 def_bool PCI
535 select HAVE_DMA_API_DEBUG
536
537config NEED_SG_DMA_LENGTH
538 def_bool PCI
539
540config HAVE_DMA_ATTRS
541 def_bool PCI
542
Jan Glauber91630032012-12-05 15:06:01 +0100543config NEED_DMA_MAP_STATE
544 def_bool PCI
545
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200546config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100547 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100548 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200549 help
550 This driver allows usage of CHSC subchannels. A CHSC subchannel
551 is usually present on LPAR only.
552 The driver creates a device /dev/chsc, which may be used to
553 obtain I/O configuration information about the machine and
554 to issue asynchronous chsc commands (DANGEROUS).
555 You will usually only want to use this interface on a special
556 LPAR designated for system management.
557
558 To compile this driver as a module, choose M here: the
559 module will be called chsc_sch.
560
561 If unsure, say N.
562
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200563config SCM_BUS
564 def_bool y
565 depends on 64BIT
566 prompt "SCM bus driver"
567 help
568 Bus driver for Storage Class Memory.
569
Sebastian Otteadb86a2012-08-28 16:48:16 +0200570config EADM_SCH
571 def_tristate m
572 prompt "Support for EADM subchannels"
573 depends on SCM_BUS
574 help
575 This driver allows usage of EADM subchannels. EADM subchannels act
576 as a communication vehicle for SCM increments.
577
578 To compile this driver as a module, choose M here: the
579 module will be called eadm_sch.
580
Jan Glauber843c48f2012-08-27 10:55:18 +0200581endmenu
582
583menu "Dump support"
584
585config CRASH_DUMP
586 bool "kernel crash dumps"
587 depends on 64BIT && SMP
588 select KEXEC
Michael Holzheu6f79d332013-09-11 14:24:54 -0700589 select ZFCPDUMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200590 help
591 Generate crash dump after being started by kexec.
592 Crash dump kernels are loaded in the main kernel with kexec-tools
593 into a specially reserved region and then later executed after
594 a crash by kdump/kexec.
595 For more details see Documentation/kdump/kdump.txt
596
597config ZFCPDUMP
598 def_bool n
599 prompt "zfcpdump support"
Michael Holzheu6f79d332013-09-11 14:24:54 -0700600 depends on SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200601 help
602 Select this option if you want to build an zfcpdump enabled kernel.
603 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
604
605endmenu
606
607menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609source "fs/Kconfig.binfmt"
610
Jan Glauber843c48f2012-08-27 10:55:18 +0200611config SECCOMP
612 def_bool y
613 prompt "Enable seccomp to safely compute untrusted bytecode"
614 depends on PROC_FS
615 help
616 This kernel feature is useful for number crunching applications
617 that may need to compute untrusted bytecode during their
618 execution. By using pipes or other transports made available to
619 the process as file descriptors supporting the read/write
620 syscalls, it's possible to isolate those applications in
621 their own address space using seccomp. Once seccomp is
622 enabled via /proc/<pid>/seccomp, it cannot be disabled
623 and the task is only allowed to execute a few safe syscalls
624 defined by each seccomp mode.
625
626 If unsure, say Y.
627
628endmenu
629
630menu "Power Management"
631
632config ARCH_HIBERNATION_POSSIBLE
633 def_bool y if 64BIT
634
635source "kernel/power/Kconfig"
636
637endmenu
638
639source "net/Kconfig"
640
641config PCMCIA
642 def_bool n
643
644config CCW
645 def_bool y
646
647source "drivers/Kconfig"
648
649source "fs/Kconfig"
650
651source "arch/s390/Kconfig.debug"
652
653source "security/Kconfig"
654
655source "crypto/Kconfig"
656
657source "lib/Kconfig"
658
659menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100660
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100662 def_bool y
663 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 help
665 Select this option, if you want to use PFAULT pseudo page fault
666 handling under VM. If running native or in LPAR, this option
667 has no effect. If your VM does not support PFAULT, PAGEEX
668 pseudo page fault handling will be used.
669 Note that VM 4.2 supports PFAULT but has a bug in its
670 implementation that causes some problems.
671 Everybody who wants to run Linux under VM != VM4.2 should select
672 this option.
673
674config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200675 bool "VM shared kernel support"
676 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 help
678 Select this option, if you want to share the text segment of the
679 Linux kernel between different VM guests. This reduces memory
680 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100681 Also if a kernel was IPL'ed from a shared segment the kexec system
682 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 You should only select this option if you know what you are
684 doing and want to exploit this feature.
685
686config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100687 def_tristate n
688 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 help
690 Select this option, if you want to enable the kernel interface
691 to reduce the memory size of the system. This is accomplished
692 by allocating pages of memory and put them "on hold". This only
693 makes sense for a system running under VM where the unused pages
694 will be reused by VM for other guest systems. The interface
695 allows an external monitor to balance memory of many systems.
696 Everybody who wants to run Linux under VM should select this
697 option.
698
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100700 def_bool y
701 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
703 help
704 Select this option to enable the special message interface to
705 the cooperative memory management.
706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100708 def_bool n
709 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100710 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 help
712 This provides a kernel interface for creating and updating z/VM APPLDATA
713 monitor records. The monitor records are updated at certain time
714 intervals, once the timer is started.
715 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
716 i.e. enables or disables monitoring on the Linux side.
717 A custom interval value (in seconds) can be written to
718 /proc/appldata/interval.
719
720 Defaults are 60 seconds interval and timer off.
721 The /proc entries can also be read from, showing the current settings.
722
723config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100724 def_tristate m
725 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800726 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 help
728 This provides memory management related data to the Linux - VM Monitor
729 Stream, like paging/swapping rate, memory utilisation, etc.
730 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
731 APPLDATA monitor record, i.e. enables or disables monitoring this record
732 on the z/VM side.
733
734 Default is disabled.
735 The /proc entry can also be read from, showing the current settings.
736
737 This can also be compiled as a module, which will be called
738 appldata_mem.o.
739
740config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100741 def_tristate m
742 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743 depends on APPLDATA_BASE
744 help
745 This provides OS related data to the Linux - VM Monitor Stream, like
746 CPU utilisation, etc.
747 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
748 APPLDATA monitor record, i.e. enables or disables monitoring this record
749 on the z/VM side.
750
751 Default is disabled.
752 This can also be compiled as a module, which will be called
753 appldata_os.o.
754
755config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100756 def_tristate m
757 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100758 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 help
760 This provides network related data to the Linux - VM Monitor Stream,
761 currently there is only a total sum of network I/O statistics, no
762 per-interface data.
763 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
764 APPLDATA monitor record, i.e. enables or disables monitoring this record
765 on the z/VM side.
766
767 Default is disabled.
768 This can also be compiled as a module, which will be called
769 appldata_net_sum.o.
770
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700771config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100772 def_bool y
773 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700774 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700775 help
776 This is a virtual file system intended to provide accounting
777 information in an s390 hypervisor environment.
778
Jan Glauber843c48f2012-08-27 10:55:18 +0200779source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200780
Carsten Ottefa587742008-03-25 18:47:44 +0100781config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100782 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700783 prompt "s390 support for virtio devices"
784 depends on 64BIT
Chen Gang79b6f7f2013-07-23 16:26:08 +0800785 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200786 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100787 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200788 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100789 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200790 Enabling this option adds support for virtio based paravirtual device
791 drivers on s390.
792
Christian Borntraeger20766c02008-08-29 13:30:56 +0200793 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200794 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200795
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796endmenu