blob: cbe56154c6e307e5bc8333a1786bd2c8e771a48e [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
Martin Schwidefsky79c74ec2013-11-22 10:04:53 +0100104 select GENERIC_TIME_VSYSCALL
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
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100138 select KTIME_SCALAR if 32BIT
David Howells786d35d2012-09-28 14:31:03 +0930139 select MODULES_USE_ELF_RELA
Al Viro7eddd992012-12-25 19:26:12 -0500140 select OLD_SIGACTION
Heiko Carstens93bead42013-09-06 10:03:30 +0200141 select OLD_SIGSUSPEND3
Heiko Carstens0e0d04a2013-02-06 10:15:55 +0100142 select SYSCTL_EXCEPTION_TRACE
Josh Triplett05634162014-02-26 18:13:06 -0800143 select TTY
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
Robert Graffham4a474152014-01-23 15:55:29 -0800338 If you say N here, the kernel will run on uni- and multiprocessor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 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,
Robert Graffham4a474152014-01-23 15:55:29 -0800341 uniprocessor machines. On a uniprocessor machine, the kernel
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 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
Xose Vazquez Perez8cb04be2013-11-29 16:33:02 +0100350 int "Maximum number of CPUs (2-256)"
351 range 2 256
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 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
Xose Vazquez Perez8cb04be2013-11-29 16:33:02 +0100357 kernel will support. The maximum supported value is 256 and the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 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
Martin Schwidefskyec66ad62014-02-12 14:16:18 +0100419config ARCH_ENABLE_SPLIT_PMD_PTLOCK
420 def_bool y
421 depends on 64BIT
422
Jan Glauber843c48f2012-08-27 10:55:18 +0200423config FORCE_MAX_ZONEORDER
424 int
425 default "9"
Heiko Carstens05445162012-05-14 10:12:41 +0200426
Jan Glauber843c48f2012-08-27 10:55:18 +0200427source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100430 def_bool y
431 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 help
433 This option enables the compiler option -mkernel-backchain if it
434 is available. If the option is available the compiler supports
435 the new stack layout which dramatically reduces the minimum stack
436 frame size. With an old compiler a non-leaf function needs a
437 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
438 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
439 and 24 byte on 64 bit.
440
441 Say Y if you are unsure.
442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100444 def_bool y
445 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 help
447 This option enables the compiler option -mstack-guard and
448 -mstack-size if they are available. If the compiler supports them
449 it will emit additional code to each function prolog to trigger
450 an illegal operation if the kernel stack is about to overflow.
451
452 Say N if you are unsure.
453
454config STACK_GUARD
455 int "Size of the guard area (128-1024)"
456 range 128 1024
457 depends on CHECK_STACK
458 default "256"
459 help
460 This allows you to specify the size of the guard area at the lower
461 end of the kernel stack. If the kernel stack points into the guard
462 area on function entry an illegal operation is triggered. The size
463 needs to be a power of 2. Please keep in mind that the size of an
464 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
465 The minimum size for the stack guard should be 256 for 31 bit and
466 512 for 64 bit.
467
Jan Glauber2c190da2011-03-15 17:08:19 +0100468config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100469 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100470 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100472 This option enables the compiler option -mwarn-dynamicstack. If the
473 compiler supports this options generates warnings for functions
474 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
476 Say N if you are unsure.
477
Jan Glauber843c48f2012-08-27 10:55:18 +0200478endmenu
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200479
Jan Glauber843c48f2012-08-27 10:55:18 +0200480menu "I/O subsystem"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100483 def_tristate y
484 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800486 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200487 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
489 To compile this driver as a module, choose M here: the
490 module will be called qdio.
491
492 If unsure, say Y.
493
Jan Glauberc8717a32012-11-29 14:38:46 +0100494menuconfig PCI
495 bool "PCI support"
496 default n
497 depends on 64BIT
Jan Glauberc8717a32012-11-29 14:38:46 +0100498 select PCI_MSI
499 help
500 Enable PCI support.
501
502if PCI
503
504config PCI_NR_FUNCTIONS
505 int "Maximum number of PCI functions (1-4096)"
506 range 1 4096
507 default "64"
508 help
509 This allows you to specify the maximum number of PCI functions which
510 this kernel will support.
511
Martin Schwidefsky1f44a222013-06-27 09:01:09 +0200512config PCI_NR_MSI
513 int "Maximum number of MSI interrupts (64-32768)"
514 range 64 32768
515 default "256"
516 help
517 This defines the number of virtual interrupts the kernel will
518 provide for MSI interrupts. If you configure your system to have
519 too few drivers will fail to allocate MSI interrupts for all
520 PCI devices.
521
Jan Glauberc8717a32012-11-29 14:38:46 +0100522source "drivers/pci/Kconfig"
523source "drivers/pci/pcie/Kconfig"
524source "drivers/pci/hotplug/Kconfig"
525
526endif # PCI
527
528config PCI_DOMAINS
529 def_bool PCI
530
531config HAS_IOMEM
532 def_bool PCI
533
534config IOMMU_HELPER
535 def_bool PCI
536
537config HAS_DMA
538 def_bool PCI
539 select HAVE_DMA_API_DEBUG
540
541config NEED_SG_DMA_LENGTH
542 def_bool PCI
543
544config HAVE_DMA_ATTRS
545 def_bool PCI
546
Jan Glauber91630032012-12-05 15:06:01 +0100547config NEED_DMA_MAP_STATE
548 def_bool PCI
549
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200550config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100551 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100552 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200553 help
554 This driver allows usage of CHSC subchannels. A CHSC subchannel
555 is usually present on LPAR only.
556 The driver creates a device /dev/chsc, which may be used to
557 obtain I/O configuration information about the machine and
558 to issue asynchronous chsc commands (DANGEROUS).
559 You will usually only want to use this interface on a special
560 LPAR designated for system management.
561
562 To compile this driver as a module, choose M here: the
563 module will be called chsc_sch.
564
565 If unsure, say N.
566
Sebastian Ott1d1c8f72012-08-28 16:46:26 +0200567config SCM_BUS
568 def_bool y
569 depends on 64BIT
570 prompt "SCM bus driver"
571 help
572 Bus driver for Storage Class Memory.
573
Sebastian Otteadb86a2012-08-28 16:48:16 +0200574config EADM_SCH
575 def_tristate m
576 prompt "Support for EADM subchannels"
577 depends on SCM_BUS
578 help
579 This driver allows usage of EADM subchannels. EADM subchannels act
580 as a communication vehicle for SCM increments.
581
582 To compile this driver as a module, choose M here: the
583 module will be called eadm_sch.
584
Jan Glauber843c48f2012-08-27 10:55:18 +0200585endmenu
586
587menu "Dump support"
588
589config CRASH_DUMP
590 bool "kernel crash dumps"
591 depends on 64BIT && SMP
592 select KEXEC
Michael Holzheu6f79d332013-09-11 14:24:54 -0700593 select ZFCPDUMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200594 help
595 Generate crash dump after being started by kexec.
596 Crash dump kernels are loaded in the main kernel with kexec-tools
597 into a specially reserved region and then later executed after
598 a crash by kdump/kexec.
599 For more details see Documentation/kdump/kdump.txt
600
601config ZFCPDUMP
602 def_bool n
603 prompt "zfcpdump support"
Heiko Carstens05e91812014-01-21 14:08:38 +0100604 depends on 64BIT && SMP
Jan Glauber843c48f2012-08-27 10:55:18 +0200605 help
606 Select this option if you want to build an zfcpdump enabled kernel.
607 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
608
609endmenu
610
611menu "Executable file formats / Emulations"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613source "fs/Kconfig.binfmt"
614
Jan Glauber843c48f2012-08-27 10:55:18 +0200615config SECCOMP
616 def_bool y
617 prompt "Enable seccomp to safely compute untrusted bytecode"
618 depends on PROC_FS
619 help
620 This kernel feature is useful for number crunching applications
621 that may need to compute untrusted bytecode during their
622 execution. By using pipes or other transports made available to
623 the process as file descriptors supporting the read/write
624 syscalls, it's possible to isolate those applications in
625 their own address space using seccomp. Once seccomp is
626 enabled via /proc/<pid>/seccomp, it cannot be disabled
627 and the task is only allowed to execute a few safe syscalls
628 defined by each seccomp mode.
629
630 If unsure, say Y.
631
632endmenu
633
634menu "Power Management"
635
636config ARCH_HIBERNATION_POSSIBLE
637 def_bool y if 64BIT
638
639source "kernel/power/Kconfig"
640
641endmenu
642
643source "net/Kconfig"
644
645config PCMCIA
646 def_bool n
647
648config CCW
649 def_bool y
650
651source "drivers/Kconfig"
652
653source "fs/Kconfig"
654
655source "arch/s390/Kconfig.debug"
656
657source "security/Kconfig"
658
659source "crypto/Kconfig"
660
661source "lib/Kconfig"
662
663menu "Virtualization"
Heiko Carstens684de392008-03-05 12:37:14 +0100664
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100666 def_bool y
667 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 help
669 Select this option, if you want to use PFAULT pseudo page fault
670 handling under VM. If running native or in LPAR, this option
671 has no effect. If your VM does not support PFAULT, PAGEEX
672 pseudo page fault handling will be used.
673 Note that VM 4.2 supports PFAULT but has a bug in its
674 implementation that causes some problems.
675 Everybody who wants to run Linux under VM != VM4.2 should select
676 this option.
677
678config SHARED_KERNEL
Heiko Carstens0eccc782012-09-25 14:53:15 +0200679 bool "VM shared kernel support"
680 depends on !JUMP_LABEL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681 help
682 Select this option, if you want to share the text segment of the
683 Linux kernel between different VM guests. This reduces memory
684 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100685 Also if a kernel was IPL'ed from a shared segment the kexec system
686 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 You should only select this option if you know what you are
688 doing and want to exploit this feature.
689
690config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100691 def_tristate n
692 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 help
694 Select this option, if you want to enable the kernel interface
695 to reduce the memory size of the system. This is accomplished
696 by allocating pages of memory and put them "on hold". This only
697 makes sense for a system running under VM where the unused pages
698 will be reused by VM for other guest systems. The interface
699 allows an external monitor to balance memory of many systems.
700 Everybody who wants to run Linux under VM should select this
701 option.
702
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100704 def_bool y
705 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
707 help
708 Select this option to enable the special message interface to
709 the cooperative memory management.
710
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100712 def_bool n
713 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100714 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 help
716 This provides a kernel interface for creating and updating z/VM APPLDATA
717 monitor records. The monitor records are updated at certain time
718 intervals, once the timer is started.
719 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
720 i.e. enables or disables monitoring on the Linux side.
721 A custom interval value (in seconds) can be written to
722 /proc/appldata/interval.
723
724 Defaults are 60 seconds interval and timer off.
725 The /proc entries can also be read from, showing the current settings.
726
727config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100728 def_tristate m
729 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800730 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 help
732 This provides memory management related data to the Linux - VM Monitor
733 Stream, like paging/swapping rate, memory utilisation, etc.
734 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
735 APPLDATA monitor record, i.e. enables or disables monitoring this record
736 on the z/VM side.
737
738 Default is disabled.
739 The /proc entry can also be read from, showing the current settings.
740
741 This can also be compiled as a module, which will be called
742 appldata_mem.o.
743
744config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100745 def_tristate m
746 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 depends on APPLDATA_BASE
748 help
749 This provides OS related data to the Linux - VM Monitor Stream, like
750 CPU utilisation, etc.
751 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
752 APPLDATA monitor record, i.e. enables or disables monitoring this record
753 on the z/VM side.
754
755 Default is disabled.
756 This can also be compiled as a module, which will be called
757 appldata_os.o.
758
759config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100760 def_tristate m
761 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100762 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 help
764 This provides network related data to the Linux - VM Monitor Stream,
765 currently there is only a total sum of network I/O statistics, no
766 per-interface data.
767 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
768 APPLDATA monitor record, i.e. enables or disables monitoring this record
769 on the z/VM side.
770
771 Default is disabled.
772 This can also be compiled as a module, which will be called
773 appldata_net_sum.o.
774
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700775config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100776 def_bool y
777 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700778 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700779 help
780 This is a virtual file system intended to provide accounting
781 information in an s390 hypervisor environment.
782
Jan Glauber843c48f2012-08-27 10:55:18 +0200783source "arch/s390/kvm/Kconfig"
Michael Holzheu411ed322007-04-27 16:01:49 +0200784
Carsten Ottefa587742008-03-25 18:47:44 +0100785config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100786 def_bool y
Kees Cook510cf5a2012-10-02 11:16:42 -0700787 prompt "s390 support for virtio devices"
788 depends on 64BIT
Chen Gang79b6f7f2013-07-23 16:26:08 +0800789 select TTY
Christian Borntraeger80629b02011-06-22 16:24:07 +0200790 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100791 select VIRTIO
Christian Borntraegerfaeba8302008-06-20 15:24:18 +0200792 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100793 help
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200794 Enabling this option adds support for virtio based paravirtual device
795 drivers on s390.
796
Christian Borntraeger20766c02008-08-29 13:30:56 +0200797 Select this option if you want to run the kernel as a guest under
Cornelia Huckbdd1fc22012-08-27 12:56:48 +0200798 the KVM hypervisor.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200799
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800endmenu