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Sam Ravnborgdaa93fa2007-11-12 20:54:30 +01001# Select 32 or 64 bit
2config 64BIT
Sam Ravnborg68409992007-11-17 15:37:31 +01003 bool "64-bit kernel" if ARCH = "x86"
4 default ARCH = "x86_64"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01005 ---help---
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +01006 Say yes to build a 64-bit kernel - formerly known as x86_64
7 Say no to build a 32-bit kernel - formerly known as i386
8
9config X86_32
10 def_bool !64BIT
11
12config X86_64
13 def_bool 64BIT
Sam Ravnborg1032c0b2007-11-06 21:35:08 +010014
15### Arch settings
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010016config X86
Harvey Harrison3c2362e2008-01-30 13:31:03 +010017 def_bool y
David Woodhousee17c6d52008-06-17 12:19:34 +010018 select HAVE_AOUT if X86_32
Hitoshi Mitake2c5643b2008-11-30 17:16:04 +090019 select HAVE_READQ
20 select HAVE_WRITEQ
Ingo Molnara5574cf2008-05-05 23:19:50 +020021 select HAVE_UNSTABLE_SCHED_CLOCK
Sam Ravnborgec7748b2008-02-09 10:46:40 +010022 select HAVE_IDE
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -050023 select HAVE_OPROFILE
Peter Zijlstracc2067a2010-11-16 21:49:01 +010024 select HAVE_PERF_EVENTS
Peter Zijlstrae360adb2010-10-14 14:01:34 +080025 select HAVE_IRQ_WORK
Rik van Riel28b2ee22008-07-23 21:27:05 -070026 select HAVE_IOREMAP_PROT
Mathieu Desnoyers3f550092008-02-02 15:10:35 -050027 select HAVE_KPROBES
Yinghai Lu72d7c3b2010-08-25 13:39:17 -070028 select HAVE_MEMBLOCK
Ingo Molnar1f972762008-07-26 13:52:50 +020029 select ARCH_WANT_OPTIONAL_GPIOLIB
Ingo Molnarda4276b2009-01-07 11:05:10 +010030 select ARCH_WANT_FRAME_POINTERS
FUJITA Tomonori7c095e42009-06-17 16:28:12 -070031 select HAVE_DMA_ATTRS
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080032 select HAVE_KRETPROBES
Masami Hiramatsuc0f7ac32010-02-25 08:34:46 -050033 select HAVE_OPTPROBES
Steven Rostedte4b2b882008-08-14 15:45:11 -040034 select HAVE_FTRACE_MCOUNT_RECORD
Steven Rostedtcf4db252010-10-14 23:32:44 -040035 select HAVE_C_RECORDMCOUNT
Steven Rostedt677aa9f2008-05-17 00:01:36 -040036 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -040037 select HAVE_FUNCTION_TRACER
Frederic Weisbecker48d68b22008-12-02 00:20:39 +010038 select HAVE_FUNCTION_GRAPH_TRACER
Steven Rostedt71e308a2009-06-18 12:45:08 -040039 select HAVE_FUNCTION_GRAPH_FP_TEST
Steven Rostedt60a7ecf2008-11-05 16:05:44 -050040 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
Steven Rostedt9a5fd902009-02-06 01:14:26 -050041 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
Josh Stone66700002009-08-24 14:43:11 -070042 select HAVE_SYSCALL_TRACEPOINTS
Ingo Molnare0ec9482009-01-27 17:01:14 +010043 select HAVE_KVM
Ingo Molnar49793b02009-01-27 17:02:29 +010044 select HAVE_ARCH_KGDB
Roland McGrath99bbc4b2008-04-20 14:35:12 -070045 select HAVE_ARCH_TRACEHOOK
Dmitry Baryshkov323ec002008-06-29 14:19:31 +040046 select HAVE_GENERIC_DMA_COHERENT if X86_32
Johannes Berg58340a02008-07-25 01:45:33 -070047 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Török Edwin8d264872008-11-23 12:39:08 +020048 select USER_STACKTRACE_SUPPORT
Heiko Carstensf850c30c2010-02-10 17:25:17 +010049 select HAVE_REGS_AND_STACK_ACCESS_API
Joerg Roedel2118d0c2009-01-09 15:13:15 +010050 select HAVE_DMA_API_DEBUG
H. Peter Anvin2e9f3bd2009-01-04 15:41:25 -080051 select HAVE_KERNEL_GZIP
52 select HAVE_KERNEL_BZIP2
53 select HAVE_KERNEL_LZMA
Lasse Collin30314802011-01-12 17:01:24 -080054 select HAVE_KERNEL_XZ
Albin Tonnerre13510992010-01-08 14:42:45 -080055 select HAVE_KERNEL_LZO
K.Prasad0067f122009-06-01 23:43:57 +053056 select HAVE_HW_BREAKPOINT
Frederic Weisbecker01027522010-04-11 18:55:56 +020057 select HAVE_MIXED_BREAKPOINTS_REGS
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010058 select PERF_EVENTS
Frederic Weisbeckerc01d4322010-05-15 22:57:48 +020059 select HAVE_PERF_EVENTS_NMI
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010060 select ANON_INODES
Pekka Enberg0a4af3b2009-02-26 21:38:56 +020061 select HAVE_ARCH_KMEMCHECK
Avi Kivity7c68af62009-09-19 09:40:22 +030062 select HAVE_USER_RETURN_NOTIFIER
Steven Rostedt46eb3b62010-09-22 23:10:23 -040063 select HAVE_ARCH_JUMP_LABEL
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +090064 select HAVE_TEXT_POKE_SMP
Thomas Gleixner3bb98082010-09-27 12:46:02 +000065 select HAVE_GENERIC_HARDIRQS
66 select HAVE_SPARSE_IRQ
Thomas Gleixner3bb98082010-09-27 12:46:02 +000067 select GENERIC_IRQ_PROBE
68 select GENERIC_PENDING_IRQ if SMP
Amerigo Wang351f8f82011-01-12 16:59:39 -080069 select USE_GENERIC_SMP_HELPERS if SMP
Balbir Singh7d8330a2008-02-10 12:46:28 +053070
Ingo Molnarba7e4d12009-06-06 13:58:12 +020071config INSTRUCTION_DECODER
72 def_bool (KPROBES || PERF_EVENTS)
73
Linus Torvalds51b26ad2009-04-26 10:12:47 -070074config OUTPUT_FORMAT
75 string
76 default "elf32-i386" if X86_32
77 default "elf64-x86-64" if X86_64
78
Sam Ravnborg73531902008-05-25 23:03:18 +020079config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020080 string
Sam Ravnborg73531902008-05-25 23:03:18 +020081 default "arch/x86/configs/i386_defconfig" if X86_32
82 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020083
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010084config GENERIC_CMOS_UPDATE
Harvey Harrison3c2362e2008-01-30 13:31:03 +010085 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010086
87config CLOCKSOURCE_WATCHDOG
Harvey Harrison3c2362e2008-01-30 13:31:03 +010088 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010089
90config GENERIC_CLOCKEVENTS
Harvey Harrison3c2362e2008-01-30 13:31:03 +010091 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010092
93config GENERIC_CLOCKEVENTS_BROADCAST
Harvey Harrison3c2362e2008-01-30 13:31:03 +010094 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010095 depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
96
97config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010098 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010099
100config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100101 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100102
Heiko Carstensaa7d9352008-02-01 17:45:14 +0100103config HAVE_LATENCYTOP_SUPPORT
104 def_bool y
105
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100106config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100107 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100108
109config ZONE_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100110 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100111
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100112config SBUS
113 bool
114
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800115config NEED_DMA_MAP_STATE
116 def_bool (X86_64 || DMAR || DMA_API_DEBUG)
117
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700118config NEED_SG_DMA_LENGTH
Andrew Morton4a14d842010-05-26 14:44:33 -0700119 def_bool y
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700120
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100121config GENERIC_ISA_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100122 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100123
124config GENERIC_IOMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100125 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100126
127config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100128 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100129 depends on BUG
Jan Beulichb93a5312008-12-16 11:40:27 +0000130 select GENERIC_BUG_RELATIVE_POINTERS if X86_64
131
132config GENERIC_BUG_RELATIVE_POINTERS
133 bool
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100134
135config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100136 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100137
Florian Fainellia6082952008-01-30 13:33:35 +0100138config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -0700139 bool
Florian Fainellia6082952008-01-30 13:33:35 +0100140
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100141config ARCH_MAY_HAVE_PC_FDC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100142 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100143
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100144config RWSEM_GENERIC_SPINLOCK
145 def_bool !X86_XADD
146
147config RWSEM_XCHGADD_ALGORITHM
148 def_bool X86_XADD
149
Venki Pallipadia6869cc2008-02-08 17:05:44 -0800150config ARCH_HAS_CPU_IDLE_WAIT
151 def_bool y
152
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100153config GENERIC_CALIBRATE_DELAY
154 def_bool y
155
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100156config GENERIC_TIME_VSYSCALL
157 bool
158 default X86_64
159
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800160config ARCH_HAS_CPU_RELAX
161 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100162
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400163config ARCH_HAS_DEFAULT_IDLE
164 def_bool y
165
Pekka Enberg1b27d052008-04-28 02:12:22 -0700166config ARCH_HAS_CACHE_LINE_SIZE
167 def_bool y
168
Mike Travisdd5af902008-01-30 13:33:32 +0100169config HAVE_SETUP_PER_CPU_AREA
Brian Gerst89c9c4c2009-01-27 12:56:48 +0900170 def_bool y
travis@sgi.comb32ef632008-01-30 13:32:51 +0100171
Tejun Heo08fc4582009-08-14 15:00:49 +0900172config NEED_PER_CPU_EMBED_FIRST_CHUNK
173 def_bool y
174
175config NEED_PER_CPU_PAGE_FIRST_CHUNK
Tejun Heo11124412009-02-20 16:29:09 +0900176 def_bool y
177
Mike Travis9f0e8d02008-04-04 18:11:01 -0700178config HAVE_CPUMASK_OF_CPU_MAP
179 def_bool X86_64_SMP
180
Johannes Berg801e4062007-12-08 02:12:39 +0100181config ARCH_HIBERNATION_POSSIBLE
182 def_bool y
Johannes Berg801e4062007-12-08 02:12:39 +0100183
Johannes Bergf4cb5702007-12-08 02:14:00 +0100184config ARCH_SUSPEND_POSSIBLE
185 def_bool y
Johannes Bergf4cb5702007-12-08 02:14:00 +0100186
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100187config ZONE_DMA32
188 bool
189 default X86_64
190
191config ARCH_POPULATES_NODE_MAP
192 def_bool y
193
194config AUDIT_ARCH
195 bool
196 default X86_64
197
Ingo Molnar765c68b2008-04-09 11:03:37 +0200198config ARCH_SUPPORTS_OPTIMIZED_INLINING
199 def_bool y
200
Akinobu Mita6a11f752009-03-31 15:23:17 -0700201config ARCH_SUPPORTS_DEBUG_PAGEALLOC
202 def_bool y
203
Shane Wang69575d32009-09-01 18:25:07 -0700204config HAVE_INTEL_TXT
205 def_bool y
206 depends on EXPERIMENTAL && DMAR && ACPI
207
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100208config X86_32_SMP
209 def_bool y
210 depends on X86_32 && SMP
211
212config X86_64_SMP
213 def_bool y
214 depends on X86_64 && SMP
215
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100216config X86_HT
Jan Beulich6fc108a2010-04-21 15:23:44 +0100217 def_bool y
Adrian Bunkee0011a2007-12-04 17:19:07 +0100218 depends on SMP
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100219
220config X86_TRAMPOLINE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100221 def_bool y
Ingo Molnar3e5095d2009-01-27 17:07:08 +0100222 depends on SMP || (64BIT && ACPI_SLEEP)
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100223
Tejun Heoccbeed32009-02-09 22:17:40 +0900224config X86_32_LAZY_GS
225 def_bool y
Tejun Heo60a53172009-02-09 22:17:40 +0900226 depends on X86_32 && !CC_STACKPROTECTOR
Tejun Heoccbeed32009-02-09 22:17:40 +0900227
Borislav Petkovd61931d2010-03-05 17:34:46 +0100228config ARCH_HWEIGHT_CFLAGS
229 string
230 default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
231 default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64
232
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100233config KTIME_SCALAR
234 def_bool X86_32
Borislav Petkovd7c53c92010-08-19 20:10:29 +0200235
236config ARCH_CPU_PROBE_RELEASE
237 def_bool y
238 depends on HOTPLUG_CPU
239
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100240source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700241source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100242
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100243menu "Processor type and features"
244
245source "kernel/time/Kconfig"
246
247config SMP
248 bool "Symmetric multi-processing support"
249 ---help---
250 This enables support for systems with more than one CPU. If you have
251 a system with only one CPU, like most personal computers, say N. If
252 you have a system with more than one CPU, say Y.
253
254 If you say N here, the kernel will run on single and multiprocessor
255 machines, but will use only one CPU of a multiprocessor machine. If
256 you say Y here, the kernel will run on many, but not all,
257 singleprocessor machines. On a singleprocessor machine, the kernel
258 will run faster if you say N here.
259
260 Note that if you say Y here and choose architecture "586" or
261 "Pentium" under "Processor family", the kernel will not work on 486
262 architectures. Similarly, multiprocessor kernels for the "PPro"
263 architecture may not work on all Pentium based boards.
264
265 People using multiprocessor machines who say Y here should also say
266 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
267 Management" code will be disabled if you say Y here.
268
Adrian Bunk03502fa2008-02-03 15:50:21 +0200269 See also <file:Documentation/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100270 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
271 <http://www.tldp.org/docs.html#howto>.
272
273 If you don't know what to do here, say N.
274
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800275config X86_X2APIC
276 bool "Support x2apic"
David Woodhousef7d7f862009-04-06 23:04:40 -0700277 depends on X86_LOCAL_APIC && X86_64 && INTR_REMAP
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800278 ---help---
279 This enables x2apic support on CPUs that have this feature.
280
281 This allows 32-bit apic IDs (so it can support very large systems),
282 and accesses the local apic via MSRs not via mmio.
283
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800284 If you don't know what to do here, say N.
285
Yinghai Lu6695c852008-06-19 12:13:09 -0700286config X86_MPPARSE
Jan Beulich7a527682008-10-30 10:38:24 +0000287 bool "Enable MPS table" if ACPI
288 default y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200289 depends on X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100290 ---help---
Yinghai Lu6695c852008-06-19 12:13:09 -0700291 For old smp systems that do not have proper acpi support. Newer systems
292 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
Yinghai Lu6695c852008-06-19 12:13:09 -0700293
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800294config X86_BIGSMP
295 bool "Support for big SMP systems with more than 8 CPUs"
296 depends on X86_32 && SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100297 ---help---
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800298 This option is needed for the systems that have more than 8 CPUs
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100299
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800300if X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800301config X86_EXTENDED_PLATFORM
302 bool "Support for extended (non-PC) x86 platforms"
303 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100304 ---help---
Ingo Molnar06ac8342009-01-27 18:11:43 +0100305 If you disable this option then the kernel will only support
306 standard PC platforms. (which covers the vast majority of
307 systems out there.)
308
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800309 If you enable this option then you'll be able to select support
310 for the following (non-PC) 32 bit x86 platforms:
311 AMD Elan
312 NUMAQ (IBM/Sequent)
313 RDC R-321x SoC
314 SGI 320/540 (Visual Workstation)
315 Summit/EXA (IBM x440)
316 Unisys ES7000 IA32 series
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200317 Moorestown MID devices
Ingo Molnar06ac8342009-01-27 18:11:43 +0100318
319 If you have one of these systems, or if you want to build a
320 generic distribution kernel, say Y here - otherwise say N.
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800321endif
Ingo Molnar06ac8342009-01-27 18:11:43 +0100322
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800323if X86_64
324config X86_EXTENDED_PLATFORM
325 bool "Support for extended (non-PC) x86 platforms"
326 default y
327 ---help---
328 If you disable this option then the kernel will only support
329 standard PC platforms. (which covers the vast majority of
330 systems out there.)
331
332 If you enable this option then you'll be able to select support
333 for the following (non-PC) 64 bit x86 platforms:
334 ScaleMP vSMP
335 SGI Ultraviolet
336
337 If you have one of these systems, or if you want to build a
338 generic distribution kernel, say Y here - otherwise say N.
339endif
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800340# This is an alphabetically sorted list of 64 bit extended platforms
341# Please maintain the alphabetic order if and when there are additions
Nick Piggin03b48632009-01-20 04:36:04 +0100342
Ingo Molnar6a485652009-01-27 18:29:13 +0100343config X86_VSMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800344 bool "ScaleMP vSMP"
Randy Dunlap03f1a172010-10-13 21:00:23 -0700345 select PARAVIRT_GUEST
Ingo Molnar6a485652009-01-27 18:29:13 +0100346 select PARAVIRT
347 depends on X86_64 && PCI
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800348 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100349 ---help---
Ingo Molnar6a485652009-01-27 18:29:13 +0100350 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
351 supposed to run on these EM64T-based machines. Only choose this option
352 if you have one of these machines.
353
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800354config X86_UV
355 bool "SGI Ultraviolet"
356 depends on X86_64
357 depends on X86_EXTENDED_PLATFORM
Jack Steiner54c28d22009-04-03 15:39:42 -0500358 depends on NUMA
Suresh Siddha9d6c26e2009-04-20 13:02:31 -0700359 depends on X86_X2APIC
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800360 ---help---
361 This option is needed in order to support SGI Ultraviolet systems.
362 If you don't have one of these, you should say N here.
363
364# Following is an alphabetically sorted list of 32 bit extended platforms
365# Please maintain the alphabetic order if and when there are additions
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100366
367config X86_ELAN
368 bool "AMD Elan"
369 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800370 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100371 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100372 Select this for an AMD Elan processor.
373
374 Do not use this option for K6/Athlon/Opteron processors!
375
376 If unsure, choose "PC-compatible" instead.
377
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800378config X86_INTEL_CE
379 bool "CE4100 TV platform"
380 depends on PCI
381 depends on PCI_GODIRECT
382 depends on X86_32
383 depends on X86_EXTENDED_PLATFORM
Dirk Brandewie37bc9f52010-11-09 12:08:08 -0800384 select X86_REBOOTFIXUPS
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800385 ---help---
386 Select for the Intel CE media processor (CE4100) SOC.
387 This option compiles in support for the CE4100 SOC for settop
388 boxes and media devices.
389
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200390config X86_MRST
391 bool "Moorestown MID platform"
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800392 depends on PCI
393 depends on PCI_GOANY
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200394 depends on X86_32
395 depends on X86_EXTENDED_PLATFORM
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800396 depends on X86_IO_APIC
Jacob Panbb24c472009-09-02 07:37:17 -0700397 select APB_TIMER
Feng Tang1da4b1c2010-11-09 11:22:58 +0000398 select I2C
399 select SPI
Alan Coxb9fc71f2010-11-15 17:31:19 +0000400 select INTEL_SCU_IPC
Randy Dunlapad025192010-11-15 10:14:06 -0800401 select X86_PLATFORM_DEVICES
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200402 ---help---
403 Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
404 Internet Device(MID) platform. Moorestown consists of two chips:
405 Lincroft (CPU core, graphics, and memory controller) and Langwell IOH.
406 Unlike standard x86 PCs, Moorestown does not have many legacy devices
407 nor standard legacy replacement devices/features. e.g. Moorestown does
408 not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
409
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800410config X86_RDC321X
411 bool "RDC R-321x SoC"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100412 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800413 depends on X86_EXTENDED_PLATFORM
414 select M486
415 select X86_REBOOTFIXUPS
416 ---help---
417 This option is needed for RDC R-321x system-on-chip, also known
418 as R-8610-(G).
419 If you don't have one of these chips, you should say N here.
420
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100421config X86_32_NON_STANDARD
Ingo Molnar9c398012009-01-27 18:24:57 +0100422 bool "Support non-standard 32-bit SMP architectures"
423 depends on X86_32 && SMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800424 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100425 ---help---
426 This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
Yinghai Lud49c4282008-06-08 18:31:54 -0700427 subarchitectures. It is intended for a generic binary kernel.
428 if you select them all, kernel will probe it one by one. and will
429 fallback to default.
430
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800431# Alphabetically sorted list of Non standard 32 bit platforms
Yinghai Lud49c4282008-06-08 18:31:54 -0700432
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100433config X86_NUMAQ
434 bool "NUMAQ (IBM/Sequent)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100435 depends on X86_32_NON_STANDARD
Pan, Jacob juna92d1522010-02-24 16:59:55 -0800436 depends on PCI
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100437 select NUMA
Ingo Molnar9c398012009-01-27 18:24:57 +0100438 select X86_MPPARSE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100439 ---help---
Yinghai Lud49c4282008-06-08 18:31:54 -0700440 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
441 NUMA multiquad box. This changes the way that processors are
442 bootstrapped, and uses Clustered Logical APIC addressing mode instead
443 of Flat Logical. You will need a new lynxer.elf file to flash your
444 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100445
Linus Torvaldsd949f362009-09-26 09:35:07 -0700446config X86_SUPPORTS_MEMORY_FAILURE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100447 def_bool y
Linus Torvaldsd949f362009-09-26 09:35:07 -0700448 # MCE code calls memory_failure():
449 depends on X86_MCE
450 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
451 depends on !X86_NUMAQ
452 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
453 depends on X86_64 || !SPARSEMEM
454 select ARCH_SUPPORTS_MEMORY_FAILURE
Linus Torvaldsd949f362009-09-26 09:35:07 -0700455
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200456config X86_VISWS
457 bool "SGI 320/540 (Visual Workstation)"
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800458 depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
459 depends on X86_32_NON_STANDARD
460 ---help---
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200461 The SGI Visual Workstation series is an IA32-based workstation
462 based on SGI systems chips with some legacy PC hardware attached.
463
464 Say Y here to create a kernel to run on the SGI 320 or 540.
465
466 A kernel compiled for the Visual Workstation will run on general
467 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
468
Ingo Molnar9c398012009-01-27 18:24:57 +0100469config X86_SUMMIT
470 bool "Summit/EXA (IBM x440)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100471 depends on X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100472 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100473 This option is needed for IBM systems that use the Summit/EXA chipset.
474 In particular, it is needed for the x440.
Ingo Molnar1f972762008-07-26 13:52:50 +0200475
Ingo Molnar9c398012009-01-27 18:24:57 +0100476config X86_ES7000
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800477 bool "Unisys ES7000 IA32 series"
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800478 depends on X86_32_NON_STANDARD && X86_BIGSMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100479 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100480 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
481 supposed to run on an IA32-based Unisys ES7000 system.
482
Shérab82148d12010-09-25 06:06:57 +0200483config X86_32_IRIS
484 tristate "Eurobraille/Iris poweroff module"
485 depends on X86_32
486 ---help---
487 The Iris machines from EuroBraille do not have APM or ACPI support
488 to shut themselves down properly. A special I/O sequence is
489 needed to do so, which is what this module does at
490 kernel shutdown.
491
492 This is only for Iris machines from EuroBraille.
493
494 If unused, say N.
495
Ingo Molnarae1e9132008-11-11 09:05:16 +0100496config SCHED_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100497 def_bool y
498 prompt "Single-depth WCHAN output"
Ken Chena87d0912008-11-06 11:10:49 -0800499 depends on X86
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100500 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100501 Calculate simpler /proc/<PID>/wchan values. If this option
502 is disabled then wchan values will recurse back to the
503 caller function. This provides more accurate wchan values,
504 at the expense of slightly more scheduling overhead.
505
506 If in doubt, say "Y".
507
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100508menuconfig PARAVIRT_GUEST
509 bool "Paravirtualized guest support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100510 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100511 Say Y here to get to see options related to running Linux under
512 various hypervisors. This option alone does not add any kernel code.
513
514 If you say N, all options in this submenu will be skipped and disabled.
515
516if PARAVIRT_GUEST
517
518source "arch/x86/xen/Kconfig"
519
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200520config KVM_CLOCK
521 bool "KVM paravirtualized clock"
522 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200523 select PARAVIRT_CLOCK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100524 ---help---
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200525 Turning on this option will allow you to run a paravirtualized clock
526 when running over the KVM hypervisor. Instead of relying on a PIT
527 (or probably other) emulation by the underlying device model, the host
528 provides the guest with timing infrastructure such as time of day, and
529 system time
530
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500531config KVM_GUEST
532 bool "KVM Guest support"
533 select PARAVIRT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100534 ---help---
535 This option enables various optimizations for running under the KVM
536 hypervisor.
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500537
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100538source "arch/x86/lguest/Kconfig"
539
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100540config PARAVIRT
541 bool "Enable paravirtualization code"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100542 ---help---
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100543 This changes the kernel so it can modify itself when it is run
544 under a hypervisor, potentially improving performance significantly
545 over full virtualization. However, when run without a hypervisor
546 the kernel is theoretically slower and slightly larger.
547
Jeremy Fitzhardingeb4ecc122009-05-13 17:16:55 -0700548config PARAVIRT_SPINLOCKS
549 bool "Paravirtualization layer for spinlocks"
550 depends on PARAVIRT && SMP && EXPERIMENTAL
551 ---help---
552 Paravirtualized spinlocks allow a pvops backend to replace the
553 spinlock implementation with something virtualization-friendly
554 (for example, block the virtual CPU rather than spinning).
555
556 Unfortunately the downside is an up to 5% performance hit on
557 native kernels, with various workloads.
558
559 If you are unsure how to answer this question, answer N.
560
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200561config PARAVIRT_CLOCK
562 bool
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200563
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100564endif
565
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400566config PARAVIRT_DEBUG
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100567 bool "paravirt-ops debugging"
568 depends on PARAVIRT && DEBUG_KERNEL
569 ---help---
570 Enable to debug paravirt_ops internals. Specifically, BUG if
571 a paravirt_op is missing when it is called.
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400572
Yinghai Lu08677212010-02-10 01:20:20 -0800573config NO_BOOTMEM
Yinghai Lu774ea0b2010-08-25 13:39:18 -0700574 def_bool y
Yinghai Lu08677212010-02-10 01:20:20 -0800575
Yinghai Lu03273182008-04-18 17:49:15 -0700576config MEMTEST
577 bool "Memtest"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100578 ---help---
Yinghai Luc64df702008-03-21 18:56:19 -0700579 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700580 to be set.
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100581 memtest=0, mean disabled; -- default
582 memtest=1, mean do 1 test pattern;
583 ...
584 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200585 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100586
587config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100588 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100589 depends on X86_32 && NUMA && X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100590
591config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100592 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100593 depends on X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100594
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100595source "arch/x86/Kconfig.cpu"
596
597config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100598 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100599 prompt "HPET Timer Support" if X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100600 ---help---
601 Use the IA-PC HPET (High Precision Event Timer) to manage
602 time in preference to the PIT and RTC, if a HPET is
603 present.
604 HPET is the next generation timer replacing legacy 8254s.
605 The HPET provides a stable time base on SMP
606 systems, unlike the TSC, but it is more expensive to access,
607 as it is off-chip. You can find the HPET spec at
608 <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100609
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100610 You can safely choose Y here. However, HPET will only be
611 activated if the platform and the BIOS support this feature.
612 Otherwise the 8254 will be used for timing services.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100613
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100614 Choose N to continue using the legacy 8254 timer.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100615
616config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100617 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800618 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100619
Jacob Panbb24c472009-09-02 07:37:17 -0700620config APB_TIMER
621 def_bool y if MRST
622 prompt "Langwell APB Timer Support" if X86_MRST
623 help
624 APB timer is the replacement for 8254, HPET on X86 MID platforms.
625 The APBT provides a stable time base on SMP
626 systems, unlike the TSC, but it is more expensive to access,
627 as it is off-chip. APB timers are always running regardless of CPU
628 C states, they are used as per CPU clockevent device when possible.
629
David Rientjes6a108a12011-01-20 14:44:16 -0800630# Mark as expert because too many people got it wrong.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100631# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700632config DMI
633 default y
David Rientjes6a108a12011-01-20 14:44:16 -0800634 bool "Enable DMI scanning" if EXPERT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100635 ---help---
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700636 Enabled scanning of DMI to identify machine quirks. Say Y
637 here unless you have verified that your setup is not
638 affected by entries in the DMI blacklist. Required by PNP
639 BIOS code.
640
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100641config GART_IOMMU
David Rientjes6a108a12011-01-20 14:44:16 -0800642 bool "GART IOMMU support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100643 default y
644 select SWIOTLB
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +0200645 depends on X86_64 && PCI && AMD_NB
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100646 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100647 Support for full DMA access of devices with 32bit memory access only
648 on systems with more than 3GB. This is usually needed for USB,
649 sound, many IDE/SATA chipsets and some other devices.
650 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
651 based hardware IOMMU and a software bounce buffer based IOMMU used
652 on Intel systems and as fallback.
653 The code is only active when needed (enough memory and limited
654 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
655 too.
656
657config CALGARY_IOMMU
658 bool "IBM Calgary IOMMU support"
659 select SWIOTLB
660 depends on X86_64 && PCI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100661 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100662 Support for hardware IOMMUs in IBM's xSeries x366 and x460
663 systems. Needed to run systems with more than 3GB of memory
664 properly with 32-bit PCI devices that do not support DAC
665 (Double Address Cycle). Calgary also supports bus level
666 isolation, where all DMAs pass through the IOMMU. This
667 prevents them from going anywhere except their intended
668 destination. This catches hard-to-find kernel bugs and
669 mis-behaving drivers and devices that do not use the DMA-API
670 properly to set up their DMA buffers. The IOMMU can be
671 turned off at boot time with the iommu=off parameter.
672 Normally the kernel will make the right choice by itself.
673 If unsure, say Y.
674
675config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100676 def_bool y
677 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100678 depends on CALGARY_IOMMU
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100679 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100680 Should Calgary be enabled by default? if you choose 'y', Calgary
681 will be used (if it exists). If you choose 'n', Calgary will not be
682 used even if it exists. If you choose 'n' and would like to use
683 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
684 If unsure, say Y.
685
Joerg Roedel2b188722008-06-26 21:27:37 +0200686config AMD_IOMMU
687 bool "AMD IOMMU support"
Ingo Molnar07c40e82008-06-27 11:31:28 +0200688 select SWIOTLB
Joerg Roedela80dc3e2008-09-11 16:51:41 +0200689 select PCI_MSI
Ingo Molnar24d2ba02008-06-27 10:37:03 +0200690 depends on X86_64 && PCI && ACPI
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100691 ---help---
Joerg Roedel18d22202008-07-03 19:35:06 +0200692 With this option you can enable support for AMD IOMMU hardware in
693 your system. An IOMMU is a hardware component which provides
694 remapping of DMA memory accesses from devices. With an AMD IOMMU you
695 can isolate the the DMA memory of different devices and protect the
696 system from misbehaving device drivers or hardware.
697
698 You can find out if your system has an AMD IOMMU if you look into
699 your BIOS for an option to enable it or if you have an IVRS ACPI
700 table.
Joerg Roedel2b188722008-06-26 21:27:37 +0200701
Joerg Roedel2e117602008-12-11 19:00:12 +0100702config AMD_IOMMU_STATS
703 bool "Export AMD IOMMU statistics to debugfs"
704 depends on AMD_IOMMU
705 select DEBUG_FS
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100706 ---help---
Joerg Roedel2e117602008-12-11 19:00:12 +0100707 This option enables code in the AMD IOMMU driver to collect various
708 statistics about whats happening in the driver and exports that
709 information to userspace via debugfs.
710 If unsure, say N.
711
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100712# need this always selected by IOMMU for the VIA workaround
713config SWIOTLB
Joerg Roedela1afd012008-11-18 12:44:21 +0100714 def_bool y if X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100715 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100716 Support for software bounce buffers used on x86-64 systems
717 which don't have a hardware IOMMU (e.g. the current generation
718 of Intel's x86-64 CPUs). Using this PCI devices which can only
719 access 32-bits of memory can be used on systems with more than
720 3 GB of memory. If unsure, say Y.
721
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700722config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900723 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700724
Joerg Roedel1aaf1182008-11-26 17:25:13 +0100725config IOMMU_API
726 def_bool (AMD_IOMMU || DMAR)
727
Mike Travis1184dc22008-05-12 21:21:12 +0200728config MAXSMP
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200729 bool "Enable Maximum number of SMP Processors and NUMA Nodes"
Mike Travis36f51012008-12-16 17:33:51 -0800730 depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
731 select CPUMASK_OFFSTACK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100732 ---help---
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200733 Enable maximum number of CPUS and NUMA Nodes for this architecture.
Mike Travis1184dc22008-05-12 21:21:12 +0200734 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100735
736config NR_CPUS
Mike Travis36f51012008-12-16 17:33:51 -0800737 int "Maximum number of CPUs" if SMP && !MAXSMP
Michael K. Johnson2a3313f2009-04-21 21:44:48 -0400738 range 2 8 if SMP && X86_32 && !X86_BIGSMP
Mike Travis36f51012008-12-16 17:33:51 -0800739 range 2 512 if SMP && !MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800740 default "1" if !SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700741 default "4096" if MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800742 default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
743 default "8" if SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100744 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100745 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700746 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100747 minimum value which makes sense is 2.
748
749 This is purely to save memory - each supported CPU adds
750 approximately eight kilobytes to the kernel image.
751
752config SCHED_SMT
753 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800754 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100755 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100756 SMT scheduler support improves the CPU scheduler's decision making
757 when dealing with Intel Pentium 4 chips with HyperThreading at a
758 cost of slightly increased overhead in some places. If unsure say
759 N here.
760
761config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100762 def_bool y
763 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800764 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100765 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100766 Multi-core scheduler support improves the CPU scheduler's decision
767 making when dealing with multi-core CPU chips at a cost of slightly
768 increased overhead in some places. If unsure say N here.
769
Venkatesh Pallipadie82b8e42010-10-04 17:03:20 -0700770config IRQ_TIME_ACCOUNTING
771 bool "Fine granularity task level IRQ time accounting"
772 default n
773 ---help---
774 Select this option to enable fine granularity task irq time
775 accounting. This is done by reading a timestamp on each
776 transitions between softirq and hardirq state, so there can be a
777 small performance impact.
778
779 If in doubt, say N here.
780
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100781source "kernel/Kconfig.preempt"
782
783config X86_UP_APIC
784 bool "Local APIC support on uniprocessors"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100785 depends on X86_32 && !SMP && !X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100786 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100787 A local APIC (Advanced Programmable Interrupt Controller) is an
788 integrated interrupt controller in the CPU. If you have a single-CPU
789 system which has a processor with a local APIC, you can say Y here to
790 enable and use it. If you say Y here even though your machine doesn't
791 have a local APIC, then the kernel will still run with no slowdown at
792 all. The local APIC supports CPU-generated self-interrupts (timer,
793 performance counters), and the NMI watchdog which detects hard
794 lockups.
795
796config X86_UP_IOAPIC
797 bool "IO-APIC support on uniprocessors"
798 depends on X86_UP_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100799 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100800 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
801 SMP-capable replacement for PC-style interrupt controllers. Most
802 SMP systems and many recent uniprocessor systems have one.
803
804 If you have a single-CPU system with an IO-APIC, you can say Y here
805 to use it. If you say Y here even though your machine doesn't have
806 an IO-APIC, then the kernel will still run with no slowdown at all.
807
808config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100809 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100810 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100811
812config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100813 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100814 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100815
816config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100817 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100818 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100819
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200820config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
821 bool "Reroute for broken boot IRQs"
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200822 depends on X86_IO_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100823 ---help---
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200824 This option enables a workaround that fixes a source of
825 spurious interrupts. This is recommended when threaded
826 interrupt handling is used on systems where the generation of
827 superfluous "boot interrupts" cannot be disabled.
828
829 Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
830 entry in the chipset's IO-APIC is masked (as, e.g. the RT
831 kernel does during interrupt handling). On chipsets where this
832 boot IRQ generation cannot be disabled, this workaround keeps
833 the original IRQ line masked so that only the equivalent "boot
834 IRQ" is delivered to the CPUs. The workaround also tells the
835 kernel to set up the IRQ handler on the boot IRQ line. In this
836 way only one interrupt is delivered to the kernel. Otherwise
837 the spurious second interrupt may cause the kernel to bring
838 down (vital) interrupt lines.
839
840 Only affects "broken" chipsets. Interrupt sharing may be
841 increased on these systems.
842
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100843config X86_MCE
Andi Kleenbab9bc62009-07-09 00:31:38 +0200844 bool "Machine Check / overheating reporting"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100845 ---help---
Andi Kleenbab9bc62009-07-09 00:31:38 +0200846 Machine Check support allows the processor to notify the
847 kernel if it detects a problem (e.g. overheating, data corruption).
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100848 The action the kernel takes depends on the severity of the problem,
Andi Kleenbab9bc62009-07-09 00:31:38 +0200849 ranging from warning messages to halting the machine.
Andi Kleen4efc0672009-04-28 19:07:31 +0200850
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100851config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100852 def_bool y
853 prompt "Intel MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200854 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100855 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100856 Additional support for intel specific MCE features such as
857 the thermal monitor.
858
859config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100860 def_bool y
861 prompt "AMD MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200862 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100863 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100864 Additional support for AMD specific MCE features such as
865 the DRAM Error Threshold.
866
Andi Kleen4efc0672009-04-28 19:07:31 +0200867config X86_ANCIENT_MCE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100868 bool "Support for old Pentium 5 / WinChip machine checks"
Andi Kleenc31d9632009-07-09 00:31:37 +0200869 depends on X86_32 && X86_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900870 ---help---
871 Include support for machine check handling on old Pentium 5 or WinChip
872 systems. These typically need to be enabled explicitely on the command
873 line.
Andi Kleen4efc0672009-04-28 19:07:31 +0200874
Andi Kleenb2762682009-02-12 13:49:31 +0100875config X86_MCE_THRESHOLD
876 depends on X86_MCE_AMD || X86_MCE_INTEL
Jan Beulich6fc108a2010-04-21 15:23:44 +0100877 def_bool y
Andi Kleenb2762682009-02-12 13:49:31 +0100878
Andi Kleenea149b32009-04-29 19:31:00 +0200879config X86_MCE_INJECT
Andi Kleenc1ebf832009-07-09 00:31:41 +0200880 depends on X86_MCE
Andi Kleenea149b32009-04-29 19:31:00 +0200881 tristate "Machine check injector support"
882 ---help---
883 Provide support for injecting machine checks for testing purposes.
884 If you don't know what a machine check is and you don't do kernel
885 QA it is safe to say n.
886
Andi Kleen4efc0672009-04-28 19:07:31 +0200887config X86_THERMAL_VECTOR
888 def_bool y
Andi Kleen5bb38ad2009-07-09 00:31:39 +0200889 depends on X86_MCE_INTEL
Andi Kleen4efc0672009-04-28 19:07:31 +0200890
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100891config VM86
David Rientjes6a108a12011-01-20 14:44:16 -0800892 bool "Enable VM86 support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100893 default y
894 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100895 ---help---
896 This option is required by programs like DOSEMU to run 16-bit legacy
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100897 code on X86 processors. It also may be needed by software like
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100898 XFree86 to initialize some video cards via BIOS. Disabling this
899 option saves about 6k.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100900
901config TOSHIBA
902 tristate "Toshiba Laptop support"
903 depends on X86_32
904 ---help---
905 This adds a driver to safely access the System Management Mode of
906 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
907 not work on models with a Phoenix BIOS. The System Management Mode
908 is used to set the BIOS and power saving options on Toshiba portables.
909
910 For information on utilities to make use of this driver see the
911 Toshiba Linux utilities web site at:
912 <http://www.buzzard.org.uk/toshiba/>.
913
914 Say Y if you intend to run this kernel on a Toshiba portable.
915 Say N otherwise.
916
917config I8K
918 tristate "Dell laptop support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100919 ---help---
920 This adds a driver to safely access the System Management Mode
921 of the CPU on the Dell Inspiron 8000. The System Management Mode
922 is used to read cpu temperature and cooling fan status and to
923 control the fans on the I8K portables.
924
925 This driver has been tested only on the Inspiron 8000 but it may
926 also work with other Dell laptops. You can force loading on other
927 models by passing the parameter `force=1' to the module. Use at
928 your own risk.
929
930 For information on utilities to make use of this driver see the
931 I8K Linux utilities web site at:
932 <http://people.debian.org/~dz/i8k/>
933
934 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
935 Say N otherwise.
936
937config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700938 bool "Enable X86 board specific fixups for reboot"
939 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100940 ---help---
941 This enables chipset and/or board specific fixups to be done
942 in order to get reboot to work correctly. This is only needed on
943 some combinations of hardware and BIOS. The symptom, for which
944 this config is intended, is when reboot ends with a stalled/hung
945 system.
946
947 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100948 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100949
950 Say Y if you want to enable the fixup. Currently, it's safe to
951 enable this option even if you don't need it.
952 Say N otherwise.
953
954config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200955 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100956 select FW_LOADER
957 ---help---
958 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200959 certain Intel and AMD processors. The Intel support is for the
960 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
961 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
962 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
963 You will obviously need the actual microcode binary data itself
964 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100965
Peter Oruba8d86f392008-07-28 18:44:21 +0200966 This option selects the general module only, you need to select
967 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100968
969 To compile this driver as a module, choose M here: the
970 module will be called microcode.
971
Peter Oruba8d86f392008-07-28 18:44:21 +0200972config MICROCODE_INTEL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100973 bool "Intel microcode patch loading support"
974 depends on MICROCODE
975 default MICROCODE
976 select FW_LOADER
977 ---help---
978 This options enables microcode patch loading support for Intel
979 processors.
Peter Oruba8d86f392008-07-28 18:44:21 +0200980
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100981 For latest news and information on obtaining all the required
982 Intel ingredients for this driver, check:
983 <http://www.urbanmyth.org/microcode/>.
Peter Oruba8d86f392008-07-28 18:44:21 +0200984
Peter Oruba80cc9f12008-07-28 18:44:22 +0200985config MICROCODE_AMD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100986 bool "AMD microcode patch loading support"
987 depends on MICROCODE
988 select FW_LOADER
989 ---help---
990 If you select this option, microcode patch loading support for AMD
991 processors will be enabled.
Peter Oruba80cc9f12008-07-28 18:44:22 +0200992
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100993config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100994 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100995 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100996
997config X86_MSR
998 tristate "/dev/cpu/*/msr - Model-specific register support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100999 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001000 This device gives privileged processes access to the x86
1001 Model-Specific Registers (MSRs). It is a character device with
1002 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
1003 MSR accesses are directed to a specific CPU on multi-processor
1004 systems.
1005
1006config X86_CPUID
1007 tristate "/dev/cpu/*/cpuid - CPU information support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001008 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001009 This device gives processes access to the x86 CPUID instruction to
1010 be executed on a specific processor. It is a character device
1011 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
1012 /dev/cpu/31/cpuid.
1013
1014choice
1015 prompt "High Memory Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001016 default HIGHMEM64G if X86_NUMAQ
Jan Beulich6fc108a2010-04-21 15:23:44 +01001017 default HIGHMEM4G
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001018 depends on X86_32
1019
1020config NOHIGHMEM
1021 bool "off"
1022 depends on !X86_NUMAQ
1023 ---help---
1024 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
1025 However, the address space of 32-bit x86 processors is only 4
1026 Gigabytes large. That means that, if you have a large amount of
1027 physical memory, not all of it can be "permanently mapped" by the
1028 kernel. The physical memory that's not permanently mapped is called
1029 "high memory".
1030
1031 If you are compiling a kernel which will never run on a machine with
1032 more than 1 Gigabyte total physical RAM, answer "off" here (default
1033 choice and suitable for most users). This will result in a "3GB/1GB"
1034 split: 3GB are mapped so that each process sees a 3GB virtual memory
1035 space and the remaining part of the 4GB virtual memory space is used
1036 by the kernel to permanently map as much physical memory as
1037 possible.
1038
1039 If the machine has between 1 and 4 Gigabytes physical RAM, then
1040 answer "4GB" here.
1041
1042 If more than 4 Gigabytes is used then answer "64GB" here. This
1043 selection turns Intel PAE (Physical Address Extension) mode on.
1044 PAE implements 3-level paging on IA32 processors. PAE is fully
1045 supported by Linux, PAE mode is implemented on all recent Intel
1046 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
1047 then the kernel will not boot on CPUs that don't support PAE!
1048
1049 The actual amount of total physical memory will either be
1050 auto detected or can be forced by using a kernel command line option
1051 such as "mem=256M". (Try "man bootparam" or see the documentation of
1052 your boot loader (lilo or loadlin) about how to pass options to the
1053 kernel at boot time.)
1054
1055 If unsure, say "off".
1056
1057config HIGHMEM4G
1058 bool "4GB"
1059 depends on !X86_NUMAQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001060 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001061 Select this if you have a 32-bit processor and between 1 and 4
1062 gigabytes of physical RAM.
1063
1064config HIGHMEM64G
1065 bool "64GB"
1066 depends on !M386 && !M486
1067 select X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001068 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001069 Select this if you have a 32-bit processor and more than 4
1070 gigabytes of physical RAM.
1071
1072endchoice
1073
1074choice
1075 depends on EXPERIMENTAL
David Rientjes6a108a12011-01-20 14:44:16 -08001076 prompt "Memory split" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001077 default VMSPLIT_3G
1078 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001079 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001080 Select the desired split between kernel and user memory.
1081
1082 If the address range available to the kernel is less than the
1083 physical memory installed, the remaining memory will be available
1084 as "high memory". Accessing high memory is a little more costly
1085 than low memory, as it needs to be mapped into the kernel first.
1086 Note that increasing the kernel address space limits the range
1087 available to user programs, making the address space there
1088 tighter. Selecting anything other than the default 3G/1G split
1089 will also likely make your kernel incompatible with binary-only
1090 kernel modules.
1091
1092 If you are not absolutely sure what you are doing, leave this
1093 option alone!
1094
1095 config VMSPLIT_3G
1096 bool "3G/1G user/kernel split"
1097 config VMSPLIT_3G_OPT
1098 depends on !X86_PAE
1099 bool "3G/1G user/kernel split (for full 1G low memory)"
1100 config VMSPLIT_2G
1101 bool "2G/2G user/kernel split"
1102 config VMSPLIT_2G_OPT
1103 depends on !X86_PAE
1104 bool "2G/2G user/kernel split (for full 2G low memory)"
1105 config VMSPLIT_1G
1106 bool "1G/3G user/kernel split"
1107endchoice
1108
1109config PAGE_OFFSET
1110 hex
1111 default 0xB0000000 if VMSPLIT_3G_OPT
1112 default 0x80000000 if VMSPLIT_2G
1113 default 0x78000000 if VMSPLIT_2G_OPT
1114 default 0x40000000 if VMSPLIT_1G
1115 default 0xC0000000
1116 depends on X86_32
1117
1118config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001119 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001120 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001121
1122config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -07001123 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001124 depends on X86_32 && !HIGHMEM4G
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001125 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001126 PAE is required for NX support, and furthermore enables
1127 larger swapspace support for non-overcommit purposes. It
1128 has the cost of more pagetable lookup overhead, and also
1129 consumes more pagetable space per process.
1130
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001131config ARCH_PHYS_ADDR_T_64BIT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001132 def_bool X86_64 || X86_PAE
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001133
FUJITA Tomonori66f2b062010-10-20 15:55:35 -07001134config ARCH_DMA_ADDR_T_64BIT
1135 def_bool X86_64 || HIGHMEM64G
1136
Nick Piggin9e899812008-10-22 12:33:16 +02001137config DIRECT_GBPAGES
David Rientjes6a108a12011-01-20 14:44:16 -08001138 bool "Enable 1GB pages for kernel pagetables" if EXPERT
Nick Piggin9e899812008-10-22 12:33:16 +02001139 default y
1140 depends on X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001141 ---help---
Nick Piggin9e899812008-10-22 12:33:16 +02001142 Allow the kernel linear mapping to use 1GB pages on CPUs that
1143 support it. This can improve the kernel's performance a tiny bit by
1144 reducing TLB pressure. If in doubt, say "Y".
1145
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001146# Common NUMA Features
1147config NUMA
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001148 bool "Numa Memory Allocation and Scheduler Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001149 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +01001150 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Yinghai Lu0699eae2008-06-17 15:39:01 -07001151 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001152 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001153 Enable NUMA (Non Uniform Memory Access) support.
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001154
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001155 The kernel will try to allocate memory used by a CPU on the
1156 local memory controller of the CPU and add some more
1157 NUMA awareness to the kernel.
1158
Ingo Molnarc280ea52008-11-08 13:29:45 +01001159 For 64-bit this is recommended if the system is Intel Core i7
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001160 (or later), AMD Opteron, or EM64T NUMA.
1161
1162 For 32-bit this is only needed on (rare) 32-bit-only platforms
1163 that support NUMA topologies, such as NUMAQ / Summit, or if you
1164 boot a 32-bit kernel on a 64-bit NUMA platform.
1165
1166 Otherwise, you should say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001167
1168comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
1169 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
1170
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001171config AMD_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001172 def_bool y
1173 prompt "Old style AMD Opteron NUMA detection"
1174 depends on X86_64 && NUMA && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001175 ---help---
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001176 Enable AMD NUMA node topology detection. You should say Y here if
1177 you have a multi processor AMD system. This uses an old method to
1178 read the NUMA configuration directly from the builtin Northbridge
1179 of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
1180 which also takes priority if both are compiled in.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001181
1182config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001183 def_bool y
1184 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001185 depends on X86_64 && NUMA && ACPI && PCI
1186 select ACPI_NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001187 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001188 Enable ACPI SRAT based node topology detection.
1189
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001190# Some NUMA nodes have memory ranges that span
1191# other nodes. Even though a pfn is valid and
1192# between a node's start and end pfns, it may not
1193# reside on that node. See memmap_init_zone()
1194# for details.
1195config NODES_SPAN_OTHER_NODES
1196 def_bool y
1197 depends on X86_64_ACPI_NUMA
1198
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001199config NUMA_EMU
1200 bool "NUMA emulation"
1201 depends on X86_64 && NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001202 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001203 Enable NUMA emulation. A flat machine will be split
1204 into virtual nodes when booted with "numa=fake=N", where N is the
1205 number of nodes. This is only useful for debugging.
1206
1207config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001208 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
David Rientjes51591e32010-03-25 15:39:27 -07001209 range 1 10
1210 default "10" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001211 default "6" if X86_64
1212 default "4" if X86_NUMAQ
1213 default "3"
1214 depends on NEED_MULTIPLE_NODES
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001215 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +02001216 Specify the maximum number of NUMA Nodes available on the target
Matt LaPlante692105b2009-01-26 11:12:25 +01001217 system. Increases memory reserved to accommodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001218
Tejun Heoc1329372009-02-24 11:57:20 +09001219config HAVE_ARCH_BOOTMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001220 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001221 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001222
1223config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001224 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001225 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001226
1227config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001228 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001229 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001230
1231config HAVE_ARCH_ALLOC_REMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001232 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001233 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001234
1235config ARCH_FLATMEM_ENABLE
1236 def_bool y
Jeff Chua99809962008-08-06 19:09:53 +08001237 depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001238
1239config ARCH_DISCONTIGMEM_ENABLE
1240 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001241 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001242
1243config ARCH_DISCONTIGMEM_DEFAULT
1244 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001245 depends on NUMA && X86_32
1246
KAMEZAWA Hiroyuki94925872009-09-22 16:45:45 -07001247config ARCH_PROC_KCORE_TEXT
1248 def_bool y
1249 depends on X86_64 && PROC_KCORE
1250
Christoph Lameterb2632952008-01-30 13:30:47 +01001251config ARCH_SPARSEMEM_DEFAULT
1252 def_bool y
1253 depends on X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001254
1255config ARCH_SPARSEMEM_ENABLE
1256 def_bool y
Yinghai Lu4272ebf2009-01-29 15:14:46 -08001257 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001258 select SPARSEMEM_STATIC if X86_32
1259 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1260
1261config ARCH_SELECT_MEMORY_MODEL
1262 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001263 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001264
1265config ARCH_MEMORY_PROBE
1266 def_bool X86_64
1267 depends on MEMORY_HOTPLUG
1268
Avi Kivitya29815a2010-01-10 16:28:09 +02001269config ILLEGAL_POINTER_VALUE
1270 hex
1271 default 0 if X86_32
1272 default 0xdead000000000000 if X86_64
1273
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001274source "mm/Kconfig"
1275
1276config HIGHPTE
1277 bool "Allocate 3rd-level pagetables from highmem"
Jan Beulich6fc108a2010-04-21 15:23:44 +01001278 depends on HIGHMEM
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001279 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001280 The VM uses one page table entry for each page of physical memory.
1281 For systems with a lot of RAM, this can be wasteful of precious
1282 low memory. Setting this option will put user-space page table
1283 entries in high memory.
1284
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001285config X86_CHECK_BIOS_CORRUPTION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001286 bool "Check for low memory corruption"
1287 ---help---
1288 Periodically check for memory corruption in low memory, which
1289 is suspected to be caused by BIOS. Even when enabled in the
1290 configuration, it is disabled at runtime. Enable it by
1291 setting "memory_corruption_check=1" on the kernel command
1292 line. By default it scans the low 64k of memory every 60
1293 seconds; see the memory_corruption_check_size and
1294 memory_corruption_check_period parameters in
1295 Documentation/kernel-parameters.txt to adjust this.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001296
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001297 When enabled with the default parameters, this option has
1298 almost no overhead, as it reserves a relatively small amount
1299 of memory and scans it infrequently. It both detects corruption
1300 and prevents it from affecting the running system.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001301
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001302 It is, however, intended as a diagnostic tool; if repeatable
1303 BIOS-originated corruption always affects the same memory,
1304 you can use memmap= to prevent the kernel from using that
1305 memory.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001306
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001307config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001308 bool "Set the default setting of memory_corruption_check"
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001309 depends on X86_CHECK_BIOS_CORRUPTION
1310 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001311 ---help---
1312 Set whether the default state of memory_corruption_check is
1313 on or off.
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001314
H. Peter Anvin9ea77bd2010-08-25 16:38:20 -07001315config X86_RESERVE_LOW
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001316 int "Amount of low memory, in kilobytes, to reserve for the BIOS"
1317 default 64
1318 range 4 640
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001319 ---help---
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001320 Specify the amount of low memory to reserve for the BIOS.
Ingo Molnarfc381512008-09-16 10:07:34 +02001321
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001322 The first page contains BIOS data structures that the kernel
1323 must not use, so that page must always be reserved.
Ingo Molnarfc381512008-09-16 10:07:34 +02001324
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001325 By default we reserve the first 64K of physical RAM, as a
1326 number of BIOSes are known to corrupt that memory range
1327 during events such as suspend/resume or monitor cable
1328 insertion, so it must not be used by the kernel.
Ingo Molnarfc381512008-09-16 10:07:34 +02001329
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001330 You can set this to 4 if you are absolutely sure that you
1331 trust the BIOS to get all its memory reservations and usages
1332 right. If you know your BIOS have problems beyond the
1333 default 64K area, you can set this to 640 to avoid using the
1334 entire low memory range.
1335
1336 If you have doubts about the BIOS (e.g. suspend/resume does
1337 not work or there's kernel crashes after certain hardware
1338 hotplug events) then you might want to enable
1339 X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check
1340 typical corruption patterns.
1341
1342 Leave this to the default value of 64 if you are unsure.
Ingo Molnarfc381512008-09-16 10:07:34 +02001343
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001344config MATH_EMULATION
1345 bool
1346 prompt "Math emulation" if X86_32
1347 ---help---
1348 Linux can emulate a math coprocessor (used for floating point
1349 operations) if you don't have one. 486DX and Pentium processors have
1350 a math coprocessor built in, 486SX and 386 do not, unless you added
1351 a 487DX or 387, respectively. (The messages during boot time can
1352 give you some hints here ["man dmesg"].) Everyone needs either a
1353 coprocessor or this emulation.
1354
1355 If you don't have a math coprocessor, you need to say Y here; if you
1356 say Y here even though you have a coprocessor, the coprocessor will
1357 be used nevertheless. (This behavior can be changed with the kernel
1358 command line option "no387", which comes handy if your coprocessor
1359 is broken. Try "man bootparam" or see the documentation of your boot
1360 loader (lilo or loadlin) about how to pass options to the kernel at
1361 boot time.) This means that it is a good idea to say Y here if you
1362 intend to use this kernel on different machines.
1363
1364 More information about the internals of the Linux math coprocessor
1365 emulation can be found in <file:arch/x86/math-emu/README>.
1366
1367 If you are not sure, say Y; apart from resulting in a 66 KB bigger
1368 kernel, it won't hurt.
1369
1370config MTRR
Jan Beulich6fc108a2010-04-21 15:23:44 +01001371 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001372 prompt "MTRR (Memory Type Range Register) support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001373 ---help---
1374 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1375 the Memory Type Range Registers (MTRRs) may be used to control
1376 processor access to memory ranges. This is most useful if you have
1377 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1378 allows bus write transfers to be combined into a larger transfer
1379 before bursting over the PCI/AGP bus. This can increase performance
1380 of image write operations 2.5 times or more. Saying Y here creates a
1381 /proc/mtrr file which may be used to manipulate your processor's
1382 MTRRs. Typically the X server should use this.
1383
1384 This code has a reasonably generic interface so that similar
1385 control registers on other processors can be easily supported
1386 as well:
1387
1388 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1389 Registers (ARRs) which provide a similar functionality to MTRRs. For
1390 these, the ARRs are used to emulate the MTRRs.
1391 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1392 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1393 write-combining. All of these processors are supported by this code
1394 and it makes sense to say Y here if you have one of them.
1395
1396 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1397 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1398 can lead to all sorts of problems, so it's good to say Y here.
1399
1400 You can safely say Y even if your machine doesn't have MTRRs, you'll
1401 just add about 9 KB to your kernel.
1402
Randy Dunlap7225e752008-07-26 17:54:22 -07001403 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001404
Yinghai Lu95ffa242008-04-29 03:52:33 -07001405config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001406 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001407 prompt "MTRR cleanup support"
1408 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001409 ---help---
Thomas Gleixneraba37282008-07-15 14:48:48 +02001410 Convert MTRR layout from continuous to discrete, so X drivers can
1411 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001412
Thomas Gleixneraba37282008-07-15 14:48:48 +02001413 Can be disabled with disable_mtrr_cleanup on the kernel command line.
Matt LaPlante692105b2009-01-26 11:12:25 +01001414 The largest mtrr entry size for a continuous block can be set with
Thomas Gleixneraba37282008-07-15 14:48:48 +02001415 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001416
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001417 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001418
1419config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001420 int "MTRR cleanup enable value (0-1)"
1421 range 0 1
1422 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001423 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001424 ---help---
Yinghai Luf5098d62008-04-29 20:25:58 -07001425 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001426
Yinghai Lu12031a62008-05-02 02:40:22 -07001427config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1428 int "MTRR cleanup spare reg num (0-7)"
1429 range 0 7
1430 default "1"
1431 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001432 ---help---
Yinghai Lu12031a62008-05-02 02:40:22 -07001433 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001434 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001435
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001436config X86_PAT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001437 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001438 prompt "x86 PAT support" if EXPERT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001439 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001440 ---help---
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001441 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001442
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001443 PATs are the modern equivalents of MTRRs and are much more
1444 flexible than MTRRs.
1445
1446 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001447 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001448
1449 If unsure, say Y.
1450
Venkatesh Pallipadi46cf98c2009-07-10 09:57:37 -07001451config ARCH_USES_PG_UNCACHED
1452 def_bool y
1453 depends on X86_PAT
1454
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001455config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001456 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001457 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001458 ---help---
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001459 This enables the kernel to use EFI runtime services that are
1460 available (such as the EFI variable services).
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001461
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001462 This option is only useful on systems that have EFI firmware.
1463 In addition, you should use the latest ELILO loader available
1464 at <http://elilo.sourceforge.net> in order to take advantage
1465 of EFI runtime services. However, even with this option, the
1466 resultant kernel should continue to boot on existing non-EFI
1467 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001468
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001469config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001470 def_bool y
1471 prompt "Enable seccomp to safely compute untrusted bytecode"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001472 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001473 This kernel feature is useful for number crunching applications
1474 that may need to compute untrusted bytecode during their
1475 execution. By using pipes or other transports made available to
1476 the process as file descriptors supporting the read/write
1477 syscalls, it's possible to isolate those applications in
1478 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001479 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001480 and the task is only allowed to execute a few safe syscalls
1481 defined by each seccomp mode.
1482
1483 If unsure, say Y. Only embedded should say N here.
1484
1485config CC_STACKPROTECTOR
1486 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001487 ---help---
1488 This option turns on the -fstack-protector GCC feature. This
Ingo Molnar113c5412008-02-14 10:36:03 +01001489 feature puts, at the beginning of functions, a canary value on
1490 the stack just before the return address, and validates
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001491 the value just before actually returning. Stack based buffer
1492 overflows (that need to overwrite this return address) now also
1493 overwrite the canary, which gets detected and the attack is then
1494 neutralized via a kernel panic.
1495
1496 This feature requires gcc version 4.2 or above, or a distribution
1497 gcc with the feature backported. Older versions are automatically
Ingo Molnar113c5412008-02-14 10:36:03 +01001498 detected and for those versions, this configuration option is
1499 ignored. (and a warning is printed during bootup)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001500
1501source kernel/Kconfig.hz
1502
1503config KEXEC
1504 bool "kexec system call"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001505 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001506 kexec is a system call that implements the ability to shutdown your
1507 current kernel, and to start another kernel. It is like a reboot
1508 but it is independent of the system firmware. And like a reboot
1509 you can start any kernel with it, not just Linux.
1510
1511 The name comes from the similarity to the exec system call.
1512
1513 It is an ongoing process to be certain the hardware in a machine
1514 is properly shutdown, so do not be surprised if this code does not
1515 initially work for you. It may help to enable device hotplugging
1516 support. As of this writing the exact hardware interface is
1517 strongly in flux, so no good recommendation can be made.
1518
1519config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001520 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001521 depends on X86_64 || (X86_32 && HIGHMEM)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001522 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001523 Generate crash dump after being started by kexec.
1524 This should be normally only set in special crash dump kernels
1525 which are loaded in the main kernel with kexec-tools into
1526 a specially reserved region and then later executed after
1527 a crash by kdump/kexec. The crash dump kernel must be compiled
1528 to a memory address not used by the main kernel or BIOS using
1529 PHYSICAL_START, or it must be built as a relocatable image
1530 (CONFIG_RELOCATABLE=y).
1531 For more details see Documentation/kdump/kdump.txt
1532
Huang Ying3ab83522008-07-25 19:45:07 -07001533config KEXEC_JUMP
1534 bool "kexec jump (EXPERIMENTAL)"
1535 depends on EXPERIMENTAL
Huang Yingfee7b0d2009-03-10 10:57:16 +08001536 depends on KEXEC && HIBERNATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001537 ---help---
Huang Ying89081d12008-07-25 19:45:10 -07001538 Jump between original kernel and kexeced kernel and invoke
1539 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001540
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001541config PHYSICAL_START
David Rientjes6a108a12011-01-20 14:44:16 -08001542 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001543 default "0x1000000"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001544 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001545 This gives the physical address where the kernel is loaded.
1546
1547 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1548 bzImage will decompress itself to above physical address and
1549 run from there. Otherwise, bzImage will run from the address where
1550 it has been loaded by the boot loader and will ignore above physical
1551 address.
1552
1553 In normal kdump cases one does not have to set/change this option
1554 as now bzImage can be compiled as a completely relocatable image
1555 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1556 address. This option is mainly useful for the folks who don't want
1557 to use a bzImage for capturing the crash dump and want to use a
1558 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1559 to be specifically compiled to run from a specific memory area
1560 (normally a reserved region) and this option comes handy.
1561
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001562 So if you are using bzImage for capturing the crash dump,
1563 leave the value here unchanged to 0x1000000 and set
1564 CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
1565 for capturing the crash dump change this value to start of
1566 the reserved region. In other words, it can be set based on
1567 the "X" value as specified in the "crashkernel=YM@XM"
1568 command line boot parameter passed to the panic-ed
1569 kernel. Please take a look at Documentation/kdump/kdump.txt
1570 for more details about crash dumps.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001571
1572 Usage of bzImage for capturing the crash dump is recommended as
1573 one does not have to build two kernels. Same kernel can be used
1574 as production kernel and capture kernel. Above option should have
1575 gone away after relocatable bzImage support is introduced. But it
1576 is present because there are users out there who continue to use
1577 vmlinux for dump capture. This option should go away down the
1578 line.
1579
1580 Don't change this unless you know what you are doing.
1581
1582config RELOCATABLE
H. Peter Anvin26717802009-05-07 14:19:34 -07001583 bool "Build a relocatable kernel"
1584 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001585 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001586 This builds a kernel image that retains relocation information
1587 so it can be loaded someplace besides the default 1MB.
1588 The relocations tend to make the kernel binary about 10% larger,
1589 but are discarded at runtime.
1590
1591 One use is for the kexec on panic case where the recovery kernel
1592 must live at a different physical address than the primary
1593 kernel.
1594
1595 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1596 it has been loaded at and the compile time physical address
1597 (CONFIG_PHYSICAL_START) is ignored.
1598
H. Peter Anvin845adf72009-05-05 21:20:51 -07001599# Relocation on x86-32 needs some additional build support
1600config X86_NEED_RELOCS
1601 def_bool y
1602 depends on X86_32 && RELOCATABLE
1603
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001604config PHYSICAL_ALIGN
Jan Beulich6fc108a2010-04-21 15:23:44 +01001605 hex "Alignment value to which kernel should be aligned" if X86_32
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001606 default "0x1000000"
1607 range 0x2000 0x1000000
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001608 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001609 This value puts the alignment restrictions on physical address
1610 where kernel is loaded and run from. Kernel is compiled for an
1611 address which meets above alignment restriction.
1612
1613 If bootloader loads the kernel at a non-aligned address and
1614 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1615 address aligned to above value and run from there.
1616
1617 If bootloader loads the kernel at a non-aligned address and
1618 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1619 load address and decompress itself to the address it has been
1620 compiled for and run from there. The address for which kernel is
1621 compiled already meets above alignment restrictions. Hence the
1622 end result is that kernel runs from a physical address meeting
1623 above alignment restrictions.
1624
1625 Don't change this unless you know what you are doing.
1626
1627config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001628 bool "Support for hot-pluggable CPUs"
Ingo Molnar4b19ed912009-01-27 17:47:24 +01001629 depends on SMP && HOTPLUG
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001630 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001631 Say Y here to allow turning CPUs off and on. CPUs can be
1632 controlled through /sys/devices/system/cpu.
1633 ( Note: power management support will enable this option
1634 automatically on SMP systems. )
1635 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001636
1637config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001638 def_bool y
1639 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001640 depends on X86_32 || IA32_EMULATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001641 ---help---
Roland McGrathaf65d642008-01-30 13:30:43 +01001642 Map the 32-bit VDSO to the predictable old-style address too.
Randy Dunlape84446d2009-11-10 15:46:52 -08001643
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001644 Say N here if you are running a sufficiently recent glibc
1645 version (2.3.3 or later), to remove the high-mapped
1646 VDSO mapping and to exclusively use the randomized VDSO.
1647
1648 If unsure, say Y.
1649
Tim Bird516cbf32008-08-12 12:52:36 -07001650config CMDLINE_BOOL
1651 bool "Built-in kernel command line"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001652 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001653 Allow for specifying boot arguments to the kernel at
1654 build time. On some systems (e.g. embedded ones), it is
1655 necessary or convenient to provide some or all of the
1656 kernel boot arguments with the kernel itself (that is,
1657 to not rely on the boot loader to provide them.)
1658
1659 To compile command line arguments into the kernel,
1660 set this option to 'Y', then fill in the
1661 the boot arguments in CONFIG_CMDLINE.
1662
1663 Systems with fully functional boot loaders (i.e. non-embedded)
1664 should leave this option set to 'N'.
1665
1666config CMDLINE
1667 string "Built-in kernel command string"
1668 depends on CMDLINE_BOOL
1669 default ""
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001670 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001671 Enter arguments here that should be compiled into the kernel
1672 image and used at boot time. If the boot loader provides a
1673 command line at boot time, it is appended to this string to
1674 form the full kernel command line, when the system boots.
1675
1676 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1677 change this behavior.
1678
1679 In most cases, the command line (whether built-in or provided
1680 by the boot loader) should specify the device for the root
1681 file system.
1682
1683config CMDLINE_OVERRIDE
1684 bool "Built-in command line overrides boot loader arguments"
Tim Bird516cbf32008-08-12 12:52:36 -07001685 depends on CMDLINE_BOOL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001686 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001687 Set this option to 'Y' to have the kernel ignore the boot loader
1688 command line, and use ONLY the built-in command line.
1689
1690 This is used to work around broken boot loaders. This should
1691 be set to 'N' under normal conditions.
1692
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001693endmenu
1694
1695config ARCH_ENABLE_MEMORY_HOTPLUG
1696 def_bool y
1697 depends on X86_64 || (X86_32 && HIGHMEM)
1698
Gary Hade35551052008-10-31 10:52:03 -07001699config ARCH_ENABLE_MEMORY_HOTREMOVE
1700 def_bool y
1701 depends on MEMORY_HOTPLUG
1702
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001703config HAVE_ARCH_EARLY_PFN_TO_NID
1704 def_bool X86_64
1705 depends on NUMA
1706
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001707config USE_PERCPU_NUMA_NODE_ID
Tejun Heo645a7912011-01-23 14:37:40 +01001708 def_bool y
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001709 depends on NUMA
1710
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001711menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001712
1713config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001714 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001715 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001716
1717source "kernel/power/Kconfig"
1718
1719source "drivers/acpi/Kconfig"
1720
Feng Tangefafc8b2009-08-14 15:23:29 -04001721source "drivers/sfi/Kconfig"
1722
Andi Kleena6b68072008-01-30 13:32:49 +01001723config X86_APM_BOOT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001724 def_bool y
Andi Kleena6b68072008-01-30 13:32:49 +01001725 depends on APM || APM_MODULE
1726
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001727menuconfig APM
1728 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001729 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001730 ---help---
1731 APM is a BIOS specification for saving power using several different
1732 techniques. This is mostly useful for battery powered laptops with
1733 APM compliant BIOSes. If you say Y here, the system time will be
1734 reset after a RESUME operation, the /proc/apm device will provide
1735 battery status information, and user-space programs will receive
1736 notification of APM "events" (e.g. battery status change).
1737
1738 If you select "Y" here, you can disable actual use of the APM
1739 BIOS by passing the "apm=off" option to the kernel at boot time.
1740
1741 Note that the APM support is almost completely disabled for
1742 machines with more than one CPU.
1743
1744 In order to use APM, you will need supporting software. For location
Randy Dunlap53471122008-03-12 18:10:51 -04001745 and more information, read <file:Documentation/power/pm.txt> and the
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001746 Battery Powered Linux mini-HOWTO, available from
1747 <http://www.tldp.org/docs.html#howto>.
1748
1749 This driver does not spin down disk drives (see the hdparm(8)
1750 manpage ("man 8 hdparm") for that), and it doesn't turn off
1751 VESA-compliant "green" monitors.
1752
1753 This driver does not support the TI 4000M TravelMate and the ACER
1754 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1755 desktop machines also don't have compliant BIOSes, and this driver
1756 may cause those machines to panic during the boot phase.
1757
1758 Generally, if you don't have a battery in your machine, there isn't
1759 much point in using this driver and you should say N. If you get
1760 random kernel OOPSes or reboots that don't seem to be related to
1761 anything, try disabling/enabling this option (or disabling/enabling
1762 APM in your BIOS).
1763
1764 Some other things you should try when experiencing seemingly random,
1765 "weird" problems:
1766
1767 1) make sure that you have enough swap space and that it is
1768 enabled.
1769 2) pass the "no-hlt" option to the kernel
1770 3) switch on floating point emulation in the kernel and pass
1771 the "no387" option to the kernel
1772 4) pass the "floppy=nodma" option to the kernel
1773 5) pass the "mem=4M" option to the kernel (thereby disabling
1774 all but the first 4 MB of RAM)
1775 6) make sure that the CPU is not over clocked.
1776 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1777 8) disable the cache from your BIOS settings
1778 9) install a fan for the video card or exchange video RAM
1779 10) install a better fan for the CPU
1780 11) exchange RAM chips
1781 12) exchange the motherboard.
1782
1783 To compile this driver as a module, choose M here: the
1784 module will be called apm.
1785
1786if APM
1787
1788config APM_IGNORE_USER_SUSPEND
1789 bool "Ignore USER SUSPEND"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001790 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001791 This option will ignore USER SUSPEND requests. On machines with a
1792 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1793 series notebooks, it is necessary to say Y because of a BIOS bug.
1794
1795config APM_DO_ENABLE
1796 bool "Enable PM at boot time"
1797 ---help---
1798 Enable APM features at boot time. From page 36 of the APM BIOS
1799 specification: "When disabled, the APM BIOS does not automatically
1800 power manage devices, enter the Standby State, enter the Suspend
1801 State, or take power saving steps in response to CPU Idle calls."
1802 This driver will make CPU Idle calls when Linux is idle (unless this
1803 feature is turned off -- see "Do CPU IDLE calls", below). This
1804 should always save battery power, but more complicated APM features
1805 will be dependent on your BIOS implementation. You may need to turn
1806 this option off if your computer hangs at boot time when using APM
1807 support, or if it beeps continuously instead of suspending. Turn
1808 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1809 T400CDT. This is off by default since most machines do fine without
1810 this feature.
1811
1812config APM_CPU_IDLE
1813 bool "Make CPU Idle calls when idle"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001814 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001815 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1816 On some machines, this can activate improved power savings, such as
1817 a slowed CPU clock rate, when the machine is idle. These idle calls
1818 are made after the idle loop has run for some length of time (e.g.,
1819 333 mS). On some machines, this will cause a hang at boot time or
1820 whenever the CPU becomes idle. (On machines with more than one CPU,
1821 this option does nothing.)
1822
1823config APM_DISPLAY_BLANK
1824 bool "Enable console blanking using APM"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001825 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001826 Enable console blanking using the APM. Some laptops can use this to
1827 turn off the LCD backlight when the screen blanker of the Linux
1828 virtual console blanks the screen. Note that this is only used by
1829 the virtual console screen blanker, and won't turn off the backlight
1830 when using the X Window system. This also doesn't have anything to
1831 do with your VESA-compliant power-saving monitor. Further, this
1832 option doesn't work for all laptops -- it might not turn off your
1833 backlight at all, or it might print a lot of errors to the console,
1834 especially if you are using gpm.
1835
1836config APM_ALLOW_INTS
1837 bool "Allow interrupts during APM BIOS calls"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001838 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001839 Normally we disable external interrupts while we are making calls to
1840 the APM BIOS as a measure to lessen the effects of a badly behaving
1841 BIOS implementation. The BIOS should reenable interrupts if it
1842 needs to. Unfortunately, some BIOSes do not -- especially those in
1843 many of the newer IBM Thinkpads. If you experience hangs when you
1844 suspend, try setting this to Y. Otherwise, say N.
1845
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001846endif # APM
1847
1848source "arch/x86/kernel/cpu/cpufreq/Kconfig"
1849
1850source "drivers/cpuidle/Kconfig"
1851
Andy Henroid27471fd2008-10-09 11:45:22 -07001852source "drivers/idle/Kconfig"
1853
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001854endmenu
1855
1856
1857menu "Bus options (PCI etc.)"
1858
1859config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001860 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001861 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001862 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001863 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001864 Find out whether you have a PCI motherboard. PCI is the name of a
1865 bus system, i.e. the way the CPU talks to the other stuff inside
1866 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1867 VESA. If you have PCI, say Y, otherwise N.
1868
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001869choice
1870 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001871 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001872 default PCI_GOANY
1873 ---help---
1874 On PCI systems, the BIOS can be used to detect the PCI devices and
1875 determine their configuration. However, some old PCI motherboards
1876 have BIOS bugs and may crash if this is done. Also, some embedded
1877 PCI-based systems don't have any BIOS at all. Linux can also try to
1878 detect the PCI hardware directly without using the BIOS.
1879
1880 With this option, you can specify how Linux should detect the
1881 PCI devices. If you choose "BIOS", the BIOS will be used,
1882 if you choose "Direct", the BIOS won't be used, and if you
1883 choose "MMConfig", then PCI Express MMCONFIG will be used.
1884 If you choose "Any", the kernel will try MMCONFIG, then the
1885 direct access method and falls back to the BIOS if that doesn't
1886 work. If unsure, go with the default, which is "Any".
1887
1888config PCI_GOBIOS
1889 bool "BIOS"
1890
1891config PCI_GOMMCONFIG
1892 bool "MMConfig"
1893
1894config PCI_GODIRECT
1895 bool "Direct"
1896
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001897config PCI_GOOLPC
Daniel Drake76fb6572010-09-23 17:28:04 +01001898 bool "OLPC XO-1"
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001899 depends on OLPC
1900
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001901config PCI_GOANY
1902 bool "Any"
1903
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001904endchoice
1905
1906config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001907 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001908 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001909
1910# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1911config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001912 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001913 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001914
1915config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001916 def_bool y
Feng Tang5f0db7a2009-08-14 15:37:50 -04001917 depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001918
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001919config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001920 def_bool y
1921 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001922
Alex Nixonb5401a92010-03-18 16:31:34 -04001923config PCI_XEN
1924 def_bool y
1925 depends on PCI && XEN
1926 select SWIOTLB_XEN
1927
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001928config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001929 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001930 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001931
1932config PCI_MMCONFIG
1933 bool "Support mmconfig PCI config space access"
1934 depends on X86_64 && PCI && ACPI
1935
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001936config PCI_CNB20LE_QUIRK
David Rientjes6a108a12011-01-20 14:44:16 -08001937 bool "Read CNB20LE Host Bridge Windows" if EXPERT
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001938 default n
1939 depends on PCI && EXPERIMENTAL
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001940 help
1941 Read the PCI windows out of the CNB20LE host bridge. This allows
1942 PCI hotplug to work on systems with the CNB20LE chipset which do
1943 not have ACPI.
1944
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001945 There's no public spec for this chipset, and this functionality
1946 is known to be incomplete.
1947
1948 You should say N unless you know you need this.
1949
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001950config DMAR
1951 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
David Woodhouse4cf2e752009-02-11 17:23:43 +00001952 depends on PCI_MSI && ACPI && EXPERIMENTAL
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001953 help
1954 DMA remapping (DMAR) devices support enables independent address
1955 translations for Direct Memory Access (DMA) from devices.
1956 These DMA remapping devices are reported via ACPI tables
1957 and include PCI device scope covered by these DMA
1958 remapping devices.
1959
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001960config DMAR_DEFAULT_ON
Kyle McMartinf6be37f2009-02-26 12:57:56 -05001961 def_bool y
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001962 prompt "Enable DMA Remapping Devices by default"
1963 depends on DMAR
1964 help
1965 Selecting this option will enable a DMAR device at boot time if
1966 one is found. If this option is not selected, DMAR support can
1967 be enabled by passing intel_iommu=on to the kernel. It is
1968 recommended you say N here while the DMAR code remains
1969 experimental.
1970
David Woodhouse62edf5d2009-07-04 10:59:46 +01001971config DMAR_BROKEN_GFX_WA
Jan Beulich6fc108a2010-04-21 15:23:44 +01001972 bool "Workaround broken graphics drivers (going away soon)"
David Woodhouse0c02a202009-09-19 09:37:23 -07001973 depends on DMAR && BROKEN
David Woodhouse62edf5d2009-07-04 10:59:46 +01001974 ---help---
1975 Current Graphics drivers tend to use physical address
1976 for DMA and avoid using DMA APIs. Setting this config
1977 option permits the IOMMU driver to set a unity map for
1978 all the OS-visible memory. Hence the driver can continue
1979 to use physical addresses for DMA, at least until this
1980 option is removed in the 2.6.32 kernel.
1981
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001982config DMAR_FLOPPY_WA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001983 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001984 depends on DMAR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001985 ---help---
David Woodhousec7ab48d2009-06-26 19:10:36 +01001986 Floppy disk drivers are known to bypass DMA API calls
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001987 thereby failing to work when IOMMU is enabled. This
1988 workaround will setup a 1:1 mapping for the first
David Woodhousec7ab48d2009-06-26 19:10:36 +01001989 16MiB to make floppy (an ISA device) work.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001990
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001991config INTR_REMAP
1992 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
1993 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001994 ---help---
1995 Supports Interrupt remapping for IO-APIC and MSI devices.
1996 To use x2apic mode in the CPU's which support x2APIC enhancements or
1997 to support platforms with CPU's having > 8 bit APIC ID, say Y.
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001998
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001999source "drivers/pci/pcie/Kconfig"
2000
2001source "drivers/pci/Kconfig"
2002
2003# x86_64 have no ISA slots, but do have ISA-style DMA.
2004config ISA_DMA_API
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002005 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002006
2007if X86_32
2008
2009config ISA
2010 bool "ISA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002011 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002012 Find out whether you have ISA slots on your motherboard. ISA is the
2013 name of a bus system, i.e. the way the CPU talks to the other stuff
2014 inside your box. Other bus systems are PCI, EISA, MicroChannel
2015 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
2016 newer boards don't support it. If you have ISA, say Y, otherwise N.
2017
2018config EISA
2019 bool "EISA support"
2020 depends on ISA
2021 ---help---
2022 The Extended Industry Standard Architecture (EISA) bus was
2023 developed as an open alternative to the IBM MicroChannel bus.
2024
2025 The EISA bus provided some of the features of the IBM MicroChannel
2026 bus while maintaining backward compatibility with cards made for
2027 the older ISA bus. The EISA bus saw limited use between 1988 and
2028 1995 when it was made obsolete by the PCI bus.
2029
2030 Say Y here if you are building a kernel for an EISA-based machine.
2031
2032 Otherwise, say N.
2033
2034source "drivers/eisa/Kconfig"
2035
2036config MCA
Ingo Molnar72ee6eb2009-01-27 16:57:49 +01002037 bool "MCA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002038 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002039 MicroChannel Architecture is found in some IBM PS/2 machines and
2040 laptops. It is a bus system similar to PCI or ISA. See
2041 <file:Documentation/mca.txt> (and especially the web page given
2042 there) before attempting to build an MCA bus kernel.
2043
2044source "drivers/mca/Kconfig"
2045
2046config SCx200
2047 tristate "NatSemi SCx200 support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002048 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002049 This provides basic support for National Semiconductor's
2050 (now AMD's) Geode processors. The driver probes for the
2051 PCI-IDs of several on-chip devices, so its a good dependency
2052 for other scx200_* drivers.
2053
2054 If compiled as a module, the driver is named scx200.
2055
2056config SCx200HR_TIMER
2057 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
John Stultz592913e2010-07-13 17:56:20 -07002058 depends on SCx200
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002059 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002060 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002061 This driver provides a clocksource built upon the on-chip
2062 27MHz high-resolution timer. Its also a workaround for
2063 NSC Geode SC-1100's buggy TSC, which loses time when the
2064 processor goes idle (as is done by the scheduler). The
2065 other workaround is idle=poll boot option.
2066
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002067config OLPC
2068 bool "One Laptop Per Child support"
Andres Salomon3c554942009-12-14 18:00:36 -08002069 select GPIOLIB
Daniel Drake3e3c4862010-09-23 17:28:46 +01002070 select OLPC_OPENFIRMWARE
H. Peter Anvin76d1f7b2011-01-14 11:57:06 -08002071 depends on !X86_64 && !X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002072 ---help---
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002073 Add support for detecting the unique features of the OLPC
2074 XO hardware.
2075
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002076config OLPC_XO1
2077 tristate "OLPC XO-1 support"
Andres Salomon419cdc52010-11-29 15:45:06 -08002078 depends on OLPC && MFD_CS5535
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002079 ---help---
2080 Add support for non-essential features of the OLPC XO-1 laptop.
2081
Andres Salomonfd699c72010-06-18 17:46:53 -04002082config OLPC_OPENFIRMWARE
2083 bool "Support for OLPC's Open Firmware"
2084 depends on !X86_64 && !X86_PAE
Daniel Drake3e3c4862010-09-23 17:28:46 +01002085 default n
Andres Salomonc10d1e22010-11-17 06:09:52 +00002086 select OF
Andres Salomonfd699c72010-06-18 17:46:53 -04002087 help
2088 This option adds support for the implementation of Open Firmware
2089 that is used on the OLPC XO-1 Children's Machine.
2090 If unsure, say N here.
2091
Andres Salomonc10d1e22010-11-17 06:09:52 +00002092config OLPC_OPENFIRMWARE_DT
2093 bool
2094 default y if OLPC_OPENFIRMWARE && PROC_DEVICETREE
2095 select OF_PROMTREE
2096
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01002097endif # X86_32
2098
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +02002099config AMD_NB
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002100 def_bool y
Borislav Petkov0e152cd2010-03-12 15:43:03 +01002101 depends on CPU_SUP_AMD && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002102
2103source "drivers/pcmcia/Kconfig"
2104
2105source "drivers/pci/hotplug/Kconfig"
2106
2107endmenu
2108
2109
2110menu "Executable file formats / Emulations"
2111
2112source "fs/Kconfig.binfmt"
2113
2114config IA32_EMULATION
2115 bool "IA32 Emulation"
2116 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01002117 select COMPAT_BINFMT_ELF
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002118 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002119 Include code to run 32-bit programs under a 64-bit kernel. You should
2120 likely turn this on, unless you're 100% sure that you don't have any
2121 32-bit programs left.
2122
2123config IA32_AOUT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002124 tristate "IA32 a.out support"
2125 depends on IA32_EMULATION
2126 ---help---
2127 Support old a.out binaries in the 32bit emulation.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002128
2129config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002130 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002131 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002132
2133config COMPAT_FOR_U64_ALIGNMENT
2134 def_bool COMPAT
2135 depends on X86_64
2136
2137config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002138 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04002139 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002140
2141endmenu
2142
2143
Keith Packarde5beae12008-11-03 18:21:45 +01002144config HAVE_ATOMIC_IOMAP
2145 def_bool y
2146 depends on X86_32
2147
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +09002148config HAVE_TEXT_POKE_SMP
2149 bool
2150 select STOP_MACHINE if SMP
2151
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002152source "net/Kconfig"
2153
2154source "drivers/Kconfig"
2155
2156source "drivers/firmware/Kconfig"
2157
2158source "fs/Kconfig"
2159
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002160source "arch/x86/Kconfig.debug"
2161
2162source "security/Kconfig"
2163
2164source "crypto/Kconfig"
2165
Avi Kivityedf88412007-12-16 11:02:48 +02002166source "arch/x86/kvm/Kconfig"
2167
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002168source "lib/Kconfig"