blob: c03fef7a9c2220c45ca1584ad8f65191bb5c9e76 [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
Martin Schwidefskyb0206322008-12-25 13:38:36 +010031config GENERIC_TIME_VSYSCALL
32 def_bool y
33
Heiko Carstens5a62b192008-04-17 07:46:25 +020034config GENERIC_CLOCKEVENTS
35 def_bool y
36
Heiko Carstensc0007f12007-04-27 16:01:42 +020037config GENERIC_BUG
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010038 def_bool y if BUG
Heiko Carstensc0007f12007-04-27 16:01:42 +020039
Heiko Carstens52499f42010-02-26 22:37:44 +010040config GENERIC_BUG_RELATIVE_POINTERS
41 def_bool y
42
Al Viro23db7642007-02-11 18:15:29 +000043config NO_IOMEM
Al Viro5ea81762007-02-11 15:41:31 +000044 def_bool y
45
Heiko Carstens411f0f32007-05-06 14:49:09 -070046config NO_DMA
47 def_bool y
48
FUJITA Tomonorieca577e2010-10-25 16:10:50 +020049config ARCH_DMA_ADDR_T_64BIT
50 def_bool 64BIT
51
Martin Schwidefskyb6b40c52008-02-05 16:50:42 +010052config GENERIC_LOCKBREAK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010053 def_bool y if SMP && PREEMPT
Martin Schwidefskyb6b40c52008-02-05 16:50:42 +010054
Carsten Otte402b0862008-03-25 18:47:10 +010055config PGSTE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +010056 def_bool y if KVM
Carsten Otte402b0862008-03-25 18:47:10 +010057
Martin Schwidefskyc185b782008-12-25 13:39:25 +010058config VIRT_CPU_ACCOUNTING
59 def_bool y
60
Akinobu Mita6a11f752009-03-31 15:23:17 -070061config ARCH_SUPPORTS_DEBUG_PAGEALLOC
62 def_bool y
63
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -080064config S390
Martin Schwidefsky61d48c22007-05-10 15:46:00 +020065 def_bool y
Heiko Carstensca9fc752008-12-25 13:38:39 +010066 select USE_GENERIC_SMP_HELPERS if SMP
Heiko Carstensed6bb612009-01-14 14:14:01 +010067 select HAVE_SYSCALL_WRAPPERS
Heiko Carstens5d360a72008-12-25 13:38:56 +010068 select HAVE_FUNCTION_TRACER
Heiko Carstens8b4488f2009-06-12 10:26:45 +020069 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
Heiko Carstensdfd9f7a2009-06-12 10:26:44 +020070 select HAVE_FTRACE_MCOUNT_RECORD
Heiko Carstensb25c4772010-10-29 16:50:42 +020071 select HAVE_C_RECORDMCOUNT
Josh Stone66700002009-08-24 14:43:11 -070072 select HAVE_SYSCALL_TRACEPOINTS
Heiko Carstensdfd9f7a2009-06-12 10:26:44 +020073 select HAVE_DYNAMIC_FTRACE
Heiko Carstens88dbd202009-06-12 10:26:46 +020074 select HAVE_FUNCTION_GRAPH_TRACER
Heiko Carstens952974ac62010-02-12 13:38:40 +010075 select HAVE_REGS_AND_STACK_ACCESS_API
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -050076 select HAVE_OPROFILE
Mathieu Desnoyers3f550092008-02-02 15:10:35 -050077 select HAVE_KPROBES
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080078 select HAVE_KRETPROBES
Christian Borntraeger77b455f2008-03-25 18:47:36 +010079 select HAVE_KVM if 64BIT
Martin Schwidefsky753c4dd2008-10-10 21:33:20 +020080 select HAVE_ARCH_TRACEHOOK
Rusty Russell98a79d62008-12-13 21:19:41 +103081 select INIT_ALL_POSSIBLE
Peter Zijlstrae360adb2010-10-14 14:01:34 +080082 select HAVE_IRQ_WORK
Ingo Molnarcdd6c482009-09-21 12:02:48 +020083 select HAVE_PERF_EVENTS
Martin Schwidefsky1844c9b2010-02-26 22:37:53 +010084 select HAVE_KERNEL_GZIP
85 select HAVE_KERNEL_BZIP2
86 select HAVE_KERNEL_LZMA
Heiko Carstenscdf56642010-05-26 23:27:12 +020087 select HAVE_KERNEL_LZO
Heiko Carstensd7b081a2011-03-15 17:08:32 +010088 select HAVE_KERNEL_XZ
Martin Schwidefsky80217142010-10-25 16:10:11 +020089 select HAVE_GET_USER_PAGES_FAST
Gerald Schaefer34b133f2011-01-05 12:48:14 +010090 select HAVE_ARCH_MUTEX_CPU_RELAX
Jan Glauber5373db82011-03-16 15:58:30 -040091 select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
Martin Schwidefsky36409f62011-06-06 14:14:41 +020092 select HAVE_RCU_TABLE_FREE if SMP
Thomas Gleixner6beb0002009-11-09 15:21:34 +000093 select ARCH_INLINE_SPIN_TRYLOCK
94 select ARCH_INLINE_SPIN_TRYLOCK_BH
95 select ARCH_INLINE_SPIN_LOCK
96 select ARCH_INLINE_SPIN_LOCK_BH
97 select ARCH_INLINE_SPIN_LOCK_IRQ
98 select ARCH_INLINE_SPIN_LOCK_IRQSAVE
99 select ARCH_INLINE_SPIN_UNLOCK
100 select ARCH_INLINE_SPIN_UNLOCK_BH
101 select ARCH_INLINE_SPIN_UNLOCK_IRQ
102 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
103 select ARCH_INLINE_READ_TRYLOCK
104 select ARCH_INLINE_READ_LOCK
105 select ARCH_INLINE_READ_LOCK_BH
106 select ARCH_INLINE_READ_LOCK_IRQ
107 select ARCH_INLINE_READ_LOCK_IRQSAVE
108 select ARCH_INLINE_READ_UNLOCK
109 select ARCH_INLINE_READ_UNLOCK_BH
110 select ARCH_INLINE_READ_UNLOCK_IRQ
111 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
112 select ARCH_INLINE_WRITE_TRYLOCK
113 select ARCH_INLINE_WRITE_LOCK
114 select ARCH_INLINE_WRITE_LOCK_BH
115 select ARCH_INLINE_WRITE_LOCK_IRQ
116 select ARCH_INLINE_WRITE_LOCK_IRQSAVE
117 select ARCH_INLINE_WRITE_UNLOCK
118 select ARCH_INLINE_WRITE_UNLOCK_BH
119 select ARCH_INLINE_WRITE_UNLOCK_IRQ
120 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200122config SCHED_OMIT_FRAME_POINTER
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100123 def_bool y
Martin Schwidefskyfca3e352009-07-07 16:37:10 +0200124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125source "init/Kconfig"
126
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700127source "kernel/Kconfig.freezer"
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129menu "Base setup"
130
131comment "Processor type and features"
132
Heiko Carstens5a62b192008-04-17 07:46:25 +0200133source "kernel/time/Kconfig"
134
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800135config 64BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100136 def_bool y
137 prompt "64 bit kernel"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200139 Select this option if you have an IBM z/Architecture machine
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 and want to use the 64 bit addressing mode.
141
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200142config 32BIT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100143 def_bool y if !64BIT
Martin Schwidefskyd9f7a742006-09-28 16:55:39 +0200144
Martin Schwidefsky07606302009-07-07 16:37:13 +0200145config KTIME_SCALAR
146 def_bool 32BIT
147
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148config SMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100149 def_bool y
150 prompt "Symmetric multi-processing support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 ---help---
152 This enables support for systems with more than one CPU. If you have
153 a system with only one CPU, like most personal computers, say N. If
154 you have a system with more than one CPU, say Y.
155
156 If you say N here, the kernel will run on single and multiprocessor
157 machines, but will use only one CPU of a multiprocessor machine. If
158 you say Y here, the kernel will run on many, but not all,
159 singleprocessor machines. On a singleprocessor machine, the kernel
160 will run faster if you say N here.
161
Adrian Bunk03502fa2008-02-03 15:50:21 +0200162 See also the SMP-HOWTO available at
163 <http://www.tldp.org/docs.html#howto>.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
165 Even if you don't know what to do here, say Y.
166
167config NR_CPUS
168 int "Maximum number of CPUs (2-64)"
169 range 2 64
170 depends on SMP
Heiko Carstens057c5cb2008-02-19 15:29:25 +0100171 default "32" if !64BIT
172 default "64" if 64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 help
174 This allows you to specify the maximum number of CPUs which this
175 kernel will support. The maximum supported value is 64 and the
176 minimum value which makes sense is 2.
177
178 This is purely to save memory - each supported CPU adds
179 approximately sixteen kilobytes to the kernel image.
180
181config HOTPLUG_CPU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100182 def_bool y
183 prompt "Support for hot-pluggable CPUs"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 depends on SMP
185 select HOTPLUG
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 help
187 Say Y here to be able to turn CPUs off and on. CPUs
188 can be controlled through /sys/devices/system/cpu/cpu#.
189 Say N if you want to disable CPU hotplug.
190
Heiko Carstens8d11e022010-10-29 16:50:37 +0200191config SCHED_MC
192 def_bool y
193 prompt "Multi-core scheduler support"
194 depends on SMP
195 help
196 Multi-core scheduler support improves the CPU scheduler's decision
197 making when dealing with multi-core CPU chips at a cost of slightly
198 increased overhead in some places.
199
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200200config SCHED_BOOK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100201 def_bool y
202 prompt "Book scheduler support"
Heiko Carstens8d11e022010-10-29 16:50:37 +0200203 depends on SMP && SCHED_MC
Heiko Carstens4cb14bc2010-08-31 10:28:18 +0200204 help
205 Book scheduler support improves the CPU scheduler's decision making
206 when dealing with machines that have several books.
207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208config MATHEMU
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100209 def_bool y
210 prompt "IEEE FPU emulation"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 depends on MARCH_G5
212 help
213 This option is required for IEEE compliant floating point arithmetic
Heiko Carstensdb81a232010-10-29 16:50:36 +0200214 on older ESA/390 machines. Say Y unless you know your machine doesn't
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 need this.
216
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800217config COMPAT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100218 def_bool y
219 prompt "Kernel support for 31 bit emulation"
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800220 depends on 64BIT
Martin Schwidefsky63506c42008-07-14 09:58:54 +0200221 select COMPAT_BINFMT_ELF
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 help
223 Select this option if you want to enable your system kernel to
224 handle system-calls from ELF binaries for 31 bit ESA. This option
225 (and some other stuff like libraries and such) is needed for
226 executing 31 bit applications. It is safe to say "Y".
227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228config SYSVIPC_COMPAT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100229 def_bool y if COMPAT && SYSVIPC
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Al Viroe65e1fc2006-09-12 03:04:40 -0400231config AUDIT_ARCH
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100232 def_bool y
Al Viroe65e1fc2006-09-12 03:04:40 -0400233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234comment "Code generation options"
235
236choice
237 prompt "Processor type"
238 default MARCH_G5
239
240config MARCH_G5
Heiko Carstensdb81a232010-10-29 16:50:36 +0200241 bool "System/390 model G5 and G6"
Martin Schwidefsky347a8dc2006-01-06 00:19:28 -0800242 depends on !64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 help
244 Select this to build a 31 bit kernel that works
Heiko Carstensdb81a232010-10-29 16:50:36 +0200245 on all ESA/390 and z/Architecture machines.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247config MARCH_Z900
Heiko Carstensdb81a232010-10-29 16:50:36 +0200248 bool "IBM zSeries model z800 and z900"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200250 Select this to enable optimizations for model z800/z900 (2064 and
251 2066 series). This will enable some optimizations that are not
252 available on older ESA/390 (31 Bit) only CPUs.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254config MARCH_Z990
Heiko Carstensdb81a232010-10-29 16:50:36 +0200255 bool "IBM zSeries model z890 and z990"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200257 Select this to enable optimizations for model z890/z990 (2084 and
258 2086 series). The kernel will be slightly faster but will not work
259 on older machines.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Christian Borntraeger0efa4702006-09-28 16:55:46 +0200261config MARCH_Z9_109
262 bool "IBM System z9"
263 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200264 Select this to enable optimizations for IBM System z9 (2094 and
265 2096 series). The kernel will be slightly faster but will not work
266 on older machines.
Christian Borntraeger0efa4702006-09-28 16:55:46 +0200267
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100268config MARCH_Z10
269 bool "IBM System z10"
270 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200271 Select this to enable optimizations for IBM System z10 (2097 and
272 2098 series). The kernel will be slightly faster but will not work
273 on older machines.
Martin Schwidefskye37f50e2008-12-25 13:39:19 +0100274
Heiko Carstensf861e402010-10-25 16:10:17 +0200275config MARCH_Z196
276 bool "IBM zEnterprise 196"
277 help
Heiko Carstensdb81a232010-10-29 16:50:36 +0200278 Select this to enable optimizations for IBM zEnterprise 196
279 (2817 series). The kernel will be slightly faster but will not work
280 on older machines.
Heiko Carstensf861e402010-10-25 16:10:17 +0200281
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282endchoice
283
284config PACK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100285 def_bool y
286 prompt "Pack kernel stack"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 help
288 This option enables the compiler option -mkernel-backchain if it
289 is available. If the option is available the compiler supports
290 the new stack layout which dramatically reduces the minimum stack
291 frame size. With an old compiler a non-leaf function needs a
292 minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
293 -mkernel-backchain the minimum size drops to 16 byte on 31 bit
294 and 24 byte on 64 bit.
295
296 Say Y if you are unsure.
297
298config SMALL_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100299 def_bool n
300 prompt "Use 8kb for kernel stack instead of 16kb"
Heiko Carstens7f5a8ba2008-10-28 11:10:21 +0100301 depends on PACK_STACK && 64BIT && !LOCKDEP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 help
303 If you say Y here and the compiler supports the -mkernel-backchain
Heiko Carstens7f5a8ba2008-10-28 11:10:21 +0100304 option the kernel will use a smaller kernel stack size. The reduced
305 size is 8kb instead of 16kb. This allows to run more threads on a
306 system and reduces the pressure on the memory management for higher
307 order page allocations.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
309 Say N if you are unsure.
310
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311config CHECK_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100312 def_bool y
313 prompt "Detect kernel stack overflow"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 help
315 This option enables the compiler option -mstack-guard and
316 -mstack-size if they are available. If the compiler supports them
317 it will emit additional code to each function prolog to trigger
318 an illegal operation if the kernel stack is about to overflow.
319
320 Say N if you are unsure.
321
322config STACK_GUARD
323 int "Size of the guard area (128-1024)"
324 range 128 1024
325 depends on CHECK_STACK
326 default "256"
327 help
328 This allows you to specify the size of the guard area at the lower
329 end of the kernel stack. If the kernel stack points into the guard
330 area on function entry an illegal operation is triggered. The size
331 needs to be a power of 2. Please keep in mind that the size of an
332 interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
333 The minimum size for the stack guard should be 256 for 31 bit and
334 512 for 64 bit.
335
Jan Glauber2c190da2011-03-15 17:08:19 +0100336config WARN_DYNAMIC_STACK
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100337 def_bool n
Jan Glauber2c190da2011-03-15 17:08:19 +0100338 prompt "Emit compiler warnings for function with dynamic stack usage"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 help
Jan Glauber2c190da2011-03-15 17:08:19 +0100340 This option enables the compiler option -mwarn-dynamicstack. If the
341 compiler supports this options generates warnings for functions
342 that dynamically allocate stack space using alloca.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344 Say N if you are unsure.
345
Heiko Carstens39b742f2006-12-08 15:56:10 +0100346config ARCH_POPULATES_NODE_MAP
347 def_bool y
348
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200349comment "Kernel preemption"
350
351source "kernel/Kconfig.preempt"
352
Heiko Carstens17f34582008-04-30 13:38:47 +0200353config ARCH_SPARSEMEM_ENABLE
354 def_bool y
355 select SPARSEMEM_VMEMMAP_ENABLE
356 select SPARSEMEM_VMEMMAP
Heiko Carstens148f1672008-06-10 10:03:18 +0200357 select SPARSEMEM_STATIC if !64BIT
Heiko Carstens17f34582008-04-30 13:38:47 +0200358
359config ARCH_SPARSEMEM_DEFAULT
360 def_bool y
361
Hans-Joachim Picht97195d62008-05-30 10:03:24 +0200362config ARCH_SELECT_MEMORY_MODEL
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100363 def_bool y
Hans-Joachim Picht97195d62008-05-30 10:03:24 +0200364
Heiko Carstens421c1752008-07-14 09:59:18 +0200365config ARCH_ENABLE_MEMORY_HOTPLUG
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100366 def_bool y if SPARSEMEM
Heiko Carstens421c1752008-07-14 09:59:18 +0200367
Gerald Schaefer7e9238f2008-08-01 16:39:16 +0200368config ARCH_ENABLE_MEMORY_HOTREMOVE
369 def_bool y
370
Hans-Joachim Picht155af2f2009-06-16 10:30:52 +0200371config ARCH_HIBERNATION_POSSIBLE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100372 def_bool y if 64BIT
Hans-Joachim Picht155af2f2009-06-16 10:30:52 +0200373
Dave Hansen3f22ab22005-06-23 00:07:43 -0700374source "mm/Kconfig"
375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376comment "I/O subsystem configuration"
377
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378config QDIO
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100379 def_tristate y
380 prompt "QDIO support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 ---help---
Frank Pavlic8129ee12006-01-06 00:19:20 -0800382 This driver provides the Queued Direct I/O base support for
Ursula Braunefca13b2008-04-17 07:46:19 +0200383 IBM System z.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
385 To compile this driver as a module, choose M here: the
386 module will be called qdio.
387
388 If unsure, say Y.
389
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200390config CHSC_SCH
Sebastian Ottd9c11b12011-01-31 11:30:09 +0100391 def_tristate m
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100392 prompt "Support for CHSC subchannels"
Cornelia Huck9d92a7e2008-07-14 09:59:05 +0200393 help
394 This driver allows usage of CHSC subchannels. A CHSC subchannel
395 is usually present on LPAR only.
396 The driver creates a device /dev/chsc, which may be used to
397 obtain I/O configuration information about the machine and
398 to issue asynchronous chsc commands (DANGEROUS).
399 You will usually only want to use this interface on a special
400 LPAR designated for system management.
401
402 To compile this driver as a module, choose M here: the
403 module will be called chsc_sch.
404
405 If unsure, say N.
406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407comment "Misc"
408
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409config IPL
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100410 def_bool y
411 prompt "Builtin IPL record support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412 help
413 If you want to use the produced kernel to IPL directly from a
414 device, you have to merge a bootsector specific to the device
415 into the first bytes of the kernel. You will have to select the
416 IPL device.
417
418choice
419 prompt "IPL method generated into head.S"
420 depends on IPL
Heiko Carstens46e79512008-10-28 11:10:20 +0100421 default IPL_VM
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 help
423 Select "tape" if you want to IPL the image from a Tape.
424
425 Select "vm_reader" if you are running under VM/ESA and want
426 to IPL the image from the emulated card reader.
427
428config IPL_TAPE
429 bool "tape"
430
431config IPL_VM
432 bool "vm_reader"
433
434endchoice
435
436source "fs/Kconfig.binfmt"
437
Heiko Carstens684de392008-03-05 12:37:14 +0100438config FORCE_MAX_ZONEORDER
439 int
440 default "9"
441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442config PFAULT
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100443 def_bool y
444 prompt "Pseudo page fault support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 help
446 Select this option, if you want to use PFAULT pseudo page fault
447 handling under VM. If running native or in LPAR, this option
448 has no effect. If your VM does not support PFAULT, PAGEEX
449 pseudo page fault handling will be used.
450 Note that VM 4.2 supports PFAULT but has a bug in its
451 implementation that causes some problems.
452 Everybody who wants to run Linux under VM != VM4.2 should select
453 this option.
454
455config SHARED_KERNEL
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100456 def_bool y
457 prompt "VM shared kernel support"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 help
459 Select this option, if you want to share the text segment of the
460 Linux kernel between different VM guests. This reduces memory
461 usage with lots of guests but greatly increases kernel size.
Heiko Carstens9c9c1762007-03-05 23:35:45 +0100462 Also if a kernel was IPL'ed from a shared segment the kexec system
463 call will not work.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 You should only select this option if you know what you are
465 doing and want to exploit this feature.
466
467config CMM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100468 def_tristate n
469 prompt "Cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 help
471 Select this option, if you want to enable the kernel interface
472 to reduce the memory size of the system. This is accomplished
473 by allocating pages of memory and put them "on hold". This only
474 makes sense for a system running under VM where the unused pages
475 will be reused by VM for other guest systems. The interface
476 allows an external monitor to balance memory of many systems.
477 Everybody who wants to run Linux under VM should select this
478 option.
479
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480config CMM_IUCV
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100481 def_bool y
482 prompt "IUCV special message interface to cooperative memory management"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
484 help
485 Select this option to enable the special message interface to
486 the cooperative memory management.
487
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488config APPLDATA_BASE
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100489 def_bool n
490 prompt "Linux - VM Monitor Stream, base infrastructure"
Martin Schwidefskyc185b782008-12-25 13:39:25 +0100491 depends on PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 help
493 This provides a kernel interface for creating and updating z/VM APPLDATA
494 monitor records. The monitor records are updated at certain time
495 intervals, once the timer is started.
496 Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
497 i.e. enables or disables monitoring on the Linux side.
498 A custom interval value (in seconds) can be written to
499 /proc/appldata/interval.
500
501 Defaults are 60 seconds interval and timer off.
502 The /proc entries can also be read from, showing the current settings.
503
504config APPLDATA_MEM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100505 def_tristate m
506 prompt "Monitor memory management statistics"
Al Viro62fb2ba2006-12-13 00:34:59 -0800507 depends on APPLDATA_BASE && VM_EVENT_COUNTERS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 help
509 This provides memory management related data to the Linux - VM Monitor
510 Stream, like paging/swapping rate, memory utilisation, etc.
511 Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
512 APPLDATA monitor record, i.e. enables or disables monitoring this record
513 on the z/VM side.
514
515 Default is disabled.
516 The /proc entry can also be read from, showing the current settings.
517
518 This can also be compiled as a module, which will be called
519 appldata_mem.o.
520
521config APPLDATA_OS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100522 def_tristate m
523 prompt "Monitor OS statistics"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 depends on APPLDATA_BASE
525 help
526 This provides OS related data to the Linux - VM Monitor Stream, like
527 CPU utilisation, etc.
528 Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
529 APPLDATA monitor record, i.e. enables or disables monitoring this record
530 on the z/VM side.
531
532 Default is disabled.
533 This can also be compiled as a module, which will be called
534 appldata_os.o.
535
536config APPLDATA_NET_SUM
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100537 def_tristate m
538 prompt "Monitor overall network statistics"
Sachin Sant70193af2009-03-26 15:24:00 +0100539 depends on APPLDATA_BASE && NET
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 help
541 This provides network related data to the Linux - VM Monitor Stream,
542 currently there is only a total sum of network I/O statistics, no
543 per-interface data.
544 Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
545 APPLDATA monitor record, i.e. enables or disables monitoring this record
546 on the z/VM side.
547
548 Default is disabled.
549 This can also be compiled as a module, which will be called
550 appldata_net_sum.o.
551
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200552source kernel/Kconfig.hz
553
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700554config S390_HYPFS_FS
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100555 def_bool y
556 prompt "s390 hypervisor file system support"
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700557 select SYS_HYPERVISOR
Michael Holzheu24bbb1f2006-06-23 02:05:06 -0700558 help
559 This is a virtual file system intended to provide accounting
560 information in an s390 hypervisor environment.
561
Heiko Carstenscf13f0e2005-06-25 14:58:11 -0700562config KEXEC
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100563 def_bool n
564 prompt "kexec system call"
Heiko Carstenscf13f0e2005-06-25 14:58:11 -0700565 help
566 kexec is a system call that implements the ability to shutdown your
567 current kernel, and to start another kernel. It is like a reboot
568 but is independent of hardware/microcode support.
569
Michael Holzheu411ed322007-04-27 16:01:49 +0200570config ZFCPDUMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100571 def_bool n
572 prompt "zfcpdump support"
Michael Holzheu411ed322007-04-27 16:01:49 +0200573 select SMP
Michael Holzheu411ed322007-04-27 16:01:49 +0200574 help
575 Select this option if you want to build an zfcpdump enabled kernel.
Dirk Hohndele4031492007-10-30 13:37:19 -0700576 Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
Michael Holzheu411ed322007-04-27 16:01:49 +0200577
Carsten Ottefa587742008-03-25 18:47:44 +0100578config S390_GUEST
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100579 def_bool y
580 prompt "s390 guest support for KVM (EXPERIMENTAL)"
Carsten Ottefa587742008-03-25 18:47:44 +0100581 depends on 64BIT && EXPERIMENTAL
Christian Borntraeger80629b02011-06-22 16:24:07 +0200582 select VIRTUALIZATION
Carsten Ottefa587742008-03-25 18:47:44 +0100583 select VIRTIO
584 select VIRTIO_RING
Christian Borntraegerfaeba832008-06-20 15:24:18 +0200585 select VIRTIO_CONSOLE
Carsten Ottefa587742008-03-25 18:47:44 +0100586 help
Christian Borntraeger20766c02008-08-29 13:30:56 +0200587 Select this option if you want to run the kernel as a guest under
588 the KVM hypervisor. This will add detection for KVM as well as a
589 virtio transport. If KVM is detected, the virtio console will be
590 the default console.
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200591
592config SECCOMP
Martin Schwidefsky6f9a3c32011-01-05 12:47:15 +0100593 def_bool y
594 prompt "Enable seccomp to safely compute untrusted bytecode"
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200595 depends on PROC_FS
Heiko Carstensbcf5cef2009-06-12 10:26:26 +0200596 help
597 This kernel feature is useful for number crunching applications
598 that may need to compute untrusted bytecode during their
599 execution. By using pipes or other transports made available to
600 the process as file descriptors supporting the read/write
601 syscalls, it's possible to isolate those applications in
602 their own address space using seccomp. Once seccomp is
603 enabled via /proc/<pid>/seccomp, it cannot be disabled
604 and the task is only allowed to execute a few safe syscalls
605 defined by each seccomp mode.
606
607 If unsure, say Y.
608
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609endmenu
610
Hans-Joachim Picht155af2f2009-06-16 10:30:52 +0200611menu "Power Management"
612
613source "kernel/power/Kconfig"
614
615endmenu
616
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700617source "net/Kconfig"
618
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619config PCMCIA
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200620 def_bool n
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200622config CCW
623 def_bool y
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Martin Schwidefsky61d48c22007-05-10 15:46:00 +0200625source "drivers/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700626
627source "fs/Kconfig"
628
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629source "arch/s390/Kconfig.debug"
630
631source "security/Kconfig"
632
633source "crypto/Kconfig"
634
635source "lib/Kconfig"
Christian Borntraeger77b455f2008-03-25 18:47:36 +0100636
637source "arch/s390/kvm/Kconfig"