blob: d71b656bcb977d7eb5933e446f07d0090f6822f6 [file] [log] [blame]
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
Russell King82491452011-05-08 18:55:19 +010011 select CLKSRC_I8253
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +010012
13config X86_64
14 def_bool 64BIT
Sam Ravnborg1032c0b2007-11-06 21:35:08 +010015
16### Arch settings
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010017config X86
Harvey Harrison3c2362e2008-01-30 13:31:03 +010018 def_bool y
David Woodhousee17c6d52008-06-17 12:19:34 +010019 select HAVE_AOUT if X86_32
Ingo Molnara5574cf2008-05-05 23:19:50 +020020 select HAVE_UNSTABLE_SCHED_CLOCK
Sam Ravnborgec7748b2008-02-09 10:46:40 +010021 select HAVE_IDE
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -050022 select HAVE_OPROFILE
Ralf Baechle8761f1a2011-06-01 19:05:09 +010023 select HAVE_PCSPKR_PLATFORM
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
Yinghai Lu141d55e2011-10-12 11:53:17 -070067 select SPARSE_IRQ
Jan Beulichc49aa5b2011-03-08 09:24:26 +000068 select GENERIC_FIND_FIRST_BIT
Thomas Gleixner3bb98082010-09-27 12:46:02 +000069 select GENERIC_IRQ_PROBE
70 select GENERIC_PENDING_IRQ if SMP
Thomas Gleixner517e4982010-12-16 17:59:57 +010071 select GENERIC_IRQ_SHOW
Martin Schwidefskyd1748302011-08-23 15:29:42 +020072 select GENERIC_CLOCKEVENTS_MIN_ADJUST
Thomas Gleixnerc01858082011-02-07 02:24:08 +010073 select IRQ_FORCED_THREADING
Amerigo Wang351f8f82011-01-12 16:59:39 -080074 select USE_GENERIC_SMP_HELPERS if SMP
Randy Dunlap9cddf152011-05-04 11:06:05 -070075 select HAVE_BPF_JIT if (X86_64 && NET)
Thomas Gleixner0a779c52011-06-09 13:08:26 +000076 select CLKEVT_I8253
Huang Yingdf013ff2011-07-13 13:14:22 +080077 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Balbir Singh7d8330a2008-02-10 12:46:28 +053078
Ingo Molnarba7e4d12009-06-06 13:58:12 +020079config INSTRUCTION_DECODER
80 def_bool (KPROBES || PERF_EVENTS)
81
Linus Torvalds51b26ad2009-04-26 10:12:47 -070082config OUTPUT_FORMAT
83 string
84 default "elf32-i386" if X86_32
85 default "elf64-x86-64" if X86_64
86
Sam Ravnborg73531902008-05-25 23:03:18 +020087config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020088 string
Sam Ravnborg73531902008-05-25 23:03:18 +020089 default "arch/x86/configs/i386_defconfig" if X86_32
90 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020091
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010092config GENERIC_CMOS_UPDATE
Harvey Harrison3c2362e2008-01-30 13:31:03 +010093 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010094
95config CLOCKSOURCE_WATCHDOG
Harvey Harrison3c2362e2008-01-30 13:31:03 +010096 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010097
98config GENERIC_CLOCKEVENTS
Harvey Harrison3c2362e2008-01-30 13:31:03 +010099 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100100
H. Peter Anvinae7bd112011-07-21 13:34:05 -0700101config ARCH_CLOCKSOURCE_DATA
102 def_bool y
103 depends on X86_64
104
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100105config GENERIC_CLOCKEVENTS_BROADCAST
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100106 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100107 depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
108
109config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100110 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100111
112config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100113 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100114
Heiko Carstensaa7d9352008-02-01 17:45:14 +0100115config HAVE_LATENCYTOP_SUPPORT
116 def_bool y
117
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100118config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100119 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100120
121config ZONE_DMA
David Rientjesdc382fd2011-05-16 13:54:10 -0700122 bool "DMA memory allocation support" if EXPERT
123 default y
124 help
125 DMA memory allocation support allows devices with less than 32-bit
126 addressing to allocate within the first 16MB of address space.
127 Disable if no such devices will be used.
128
129 If unsure, say Y.
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100130
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100131config SBUS
132 bool
133
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800134config NEED_DMA_MAP_STATE
Suresh Siddhad3f13812011-08-23 17:05:25 -0700135 def_bool (X86_64 || INTEL_IOMMU || DMA_API_DEBUG)
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800136
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700137config NEED_SG_DMA_LENGTH
Andrew Morton4a14d842010-05-26 14:44:33 -0700138 def_bool y
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700139
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100140config GENERIC_ISA_DMA
David Rientjes1c00f012011-03-22 16:34:59 -0700141 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100142
143config GENERIC_IOMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100144 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100145
146config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100147 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100148 depends on BUG
Jan Beulichb93a5312008-12-16 11:40:27 +0000149 select GENERIC_BUG_RELATIVE_POINTERS if X86_64
150
151config GENERIC_BUG_RELATIVE_POINTERS
152 bool
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100153
154config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100155 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100156
Florian Fainellia6082952008-01-30 13:33:35 +0100157config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -0700158 bool
Florian Fainellia6082952008-01-30 13:33:35 +0100159
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100160config ARCH_MAY_HAVE_PC_FDC
David Rientjes8df3bd92011-03-22 16:34:58 -0700161 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100162
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100163config RWSEM_GENERIC_SPINLOCK
164 def_bool !X86_XADD
165
166config RWSEM_XCHGADD_ALGORITHM
167 def_bool X86_XADD
168
Venki Pallipadia6869cc2008-02-08 17:05:44 -0800169config ARCH_HAS_CPU_IDLE_WAIT
170 def_bool y
171
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100172config GENERIC_CALIBRATE_DELAY
173 def_bool y
174
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100175config GENERIC_TIME_VSYSCALL
176 bool
177 default X86_64
178
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800179config ARCH_HAS_CPU_RELAX
180 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100181
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400182config ARCH_HAS_DEFAULT_IDLE
183 def_bool y
184
Pekka Enberg1b27d052008-04-28 02:12:22 -0700185config ARCH_HAS_CACHE_LINE_SIZE
186 def_bool y
187
Mike Travisdd5af902008-01-30 13:33:32 +0100188config HAVE_SETUP_PER_CPU_AREA
Brian Gerst89c9c4c2009-01-27 12:56:48 +0900189 def_bool y
travis@sgi.comb32ef632008-01-30 13:32:51 +0100190
Tejun Heo08fc4582009-08-14 15:00:49 +0900191config NEED_PER_CPU_EMBED_FIRST_CHUNK
192 def_bool y
193
194config NEED_PER_CPU_PAGE_FIRST_CHUNK
Tejun Heo11124412009-02-20 16:29:09 +0900195 def_bool y
196
Johannes Berg801e4062007-12-08 02:12:39 +0100197config ARCH_HIBERNATION_POSSIBLE
198 def_bool y
Johannes Berg801e4062007-12-08 02:12:39 +0100199
Johannes Bergf4cb5702007-12-08 02:14:00 +0100200config ARCH_SUSPEND_POSSIBLE
201 def_bool y
Johannes Bergf4cb5702007-12-08 02:14:00 +0100202
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100203config ZONE_DMA32
204 bool
205 default X86_64
206
207config ARCH_POPULATES_NODE_MAP
208 def_bool y
209
210config AUDIT_ARCH
211 bool
212 default X86_64
213
Ingo Molnar765c68b2008-04-09 11:03:37 +0200214config ARCH_SUPPORTS_OPTIMIZED_INLINING
215 def_bool y
216
Akinobu Mita6a11f752009-03-31 15:23:17 -0700217config ARCH_SUPPORTS_DEBUG_PAGEALLOC
218 def_bool y
219
Shane Wang69575d32009-09-01 18:25:07 -0700220config HAVE_INTEL_TXT
221 def_bool y
Suresh Siddhad3f13812011-08-23 17:05:25 -0700222 depends on EXPERIMENTAL && INTEL_IOMMU && ACPI
Shane Wang69575d32009-09-01 18:25:07 -0700223
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100224config X86_32_SMP
225 def_bool y
226 depends on X86_32 && SMP
227
228config X86_64_SMP
229 def_bool y
230 depends on X86_64 && SMP
231
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100232config X86_HT
Jan Beulich6fc108a2010-04-21 15:23:44 +0100233 def_bool y
Adrian Bunkee0011a2007-12-04 17:19:07 +0100234 depends on SMP
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100235
Tejun Heoccbeed32009-02-09 22:17:40 +0900236config X86_32_LAZY_GS
237 def_bool y
Tejun Heo60a53172009-02-09 22:17:40 +0900238 depends on X86_32 && !CC_STACKPROTECTOR
Tejun Heoccbeed32009-02-09 22:17:40 +0900239
Borislav Petkovd61931d2010-03-05 17:34:46 +0100240config ARCH_HWEIGHT_CFLAGS
241 string
242 default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
243 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
244
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100245config KTIME_SCALAR
246 def_bool X86_32
Borislav Petkovd7c53c92010-08-19 20:10:29 +0200247
248config ARCH_CPU_PROBE_RELEASE
249 def_bool y
250 depends on HOTPLUG_CPU
251
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100252source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700253source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100254
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100255menu "Processor type and features"
256
257source "kernel/time/Kconfig"
258
259config SMP
260 bool "Symmetric multi-processing support"
261 ---help---
262 This enables support for systems with more than one CPU. If you have
263 a system with only one CPU, like most personal computers, say N. If
264 you have a system with more than one CPU, say Y.
265
266 If you say N here, the kernel will run on single and multiprocessor
267 machines, but will use only one CPU of a multiprocessor machine. If
268 you say Y here, the kernel will run on many, but not all,
269 singleprocessor machines. On a singleprocessor machine, the kernel
270 will run faster if you say N here.
271
272 Note that if you say Y here and choose architecture "586" or
273 "Pentium" under "Processor family", the kernel will not work on 486
274 architectures. Similarly, multiprocessor kernels for the "PPro"
275 architecture may not work on all Pentium based boards.
276
277 People using multiprocessor machines who say Y here should also say
278 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
279 Management" code will be disabled if you say Y here.
280
Paul Bolle395cf962011-08-15 02:02:26 +0200281 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100282 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
283 <http://www.tldp.org/docs.html#howto>.
284
285 If you don't know what to do here, say N.
286
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800287config X86_X2APIC
288 bool "Support x2apic"
Suresh Siddhad3f13812011-08-23 17:05:25 -0700289 depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800290 ---help---
291 This enables x2apic support on CPUs that have this feature.
292
293 This allows 32-bit apic IDs (so it can support very large systems),
294 and accesses the local apic via MSRs not via mmio.
295
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800296 If you don't know what to do here, say N.
297
Yinghai Lu6695c852008-06-19 12:13:09 -0700298config X86_MPPARSE
Jan Beulich7a527682008-10-30 10:38:24 +0000299 bool "Enable MPS table" if ACPI
300 default y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200301 depends on X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100302 ---help---
Yinghai Lu6695c852008-06-19 12:13:09 -0700303 For old smp systems that do not have proper acpi support. Newer systems
304 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
Yinghai Lu6695c852008-06-19 12:13:09 -0700305
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800306config X86_BIGSMP
307 bool "Support for big SMP systems with more than 8 CPUs"
308 depends on X86_32 && SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100309 ---help---
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800310 This option is needed for the systems that have more than 8 CPUs
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100311
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800312if X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800313config X86_EXTENDED_PLATFORM
314 bool "Support for extended (non-PC) x86 platforms"
315 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100316 ---help---
Ingo Molnar06ac8342009-01-27 18:11:43 +0100317 If you disable this option then the kernel will only support
318 standard PC platforms. (which covers the vast majority of
319 systems out there.)
320
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800321 If you enable this option then you'll be able to select support
322 for the following (non-PC) 32 bit x86 platforms:
323 AMD Elan
324 NUMAQ (IBM/Sequent)
325 RDC R-321x SoC
326 SGI 320/540 (Visual Workstation)
327 Summit/EXA (IBM x440)
328 Unisys ES7000 IA32 series
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200329 Moorestown MID devices
Ingo Molnar06ac8342009-01-27 18:11:43 +0100330
331 If you have one of these systems, or if you want to build a
332 generic distribution kernel, say Y here - otherwise say N.
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800333endif
Ingo Molnar06ac8342009-01-27 18:11:43 +0100334
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800335if X86_64
336config X86_EXTENDED_PLATFORM
337 bool "Support for extended (non-PC) x86 platforms"
338 default y
339 ---help---
340 If you disable this option then the kernel will only support
341 standard PC platforms. (which covers the vast majority of
342 systems out there.)
343
344 If you enable this option then you'll be able to select support
345 for the following (non-PC) 64 bit x86 platforms:
346 ScaleMP vSMP
347 SGI Ultraviolet
348
349 If you have one of these systems, or if you want to build a
350 generic distribution kernel, say Y here - otherwise say N.
351endif
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800352# This is an alphabetically sorted list of 64 bit extended platforms
353# Please maintain the alphabetic order if and when there are additions
Nick Piggin03b48632009-01-20 04:36:04 +0100354
Ingo Molnar6a485652009-01-27 18:29:13 +0100355config X86_VSMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800356 bool "ScaleMP vSMP"
Randy Dunlap03f1a172010-10-13 21:00:23 -0700357 select PARAVIRT_GUEST
Ingo Molnar6a485652009-01-27 18:29:13 +0100358 select PARAVIRT
359 depends on X86_64 && PCI
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800360 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100361 ---help---
Ingo Molnar6a485652009-01-27 18:29:13 +0100362 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
363 supposed to run on these EM64T-based machines. Only choose this option
364 if you have one of these machines.
365
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800366config X86_UV
367 bool "SGI Ultraviolet"
368 depends on X86_64
369 depends on X86_EXTENDED_PLATFORM
Jack Steiner54c28d22009-04-03 15:39:42 -0500370 depends on NUMA
Suresh Siddha9d6c26e2009-04-20 13:02:31 -0700371 depends on X86_X2APIC
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800372 ---help---
373 This option is needed in order to support SGI Ultraviolet systems.
374 If you don't have one of these, you should say N here.
375
376# Following is an alphabetically sorted list of 32 bit extended platforms
377# Please maintain the alphabetic order if and when there are additions
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100378
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800379config X86_INTEL_CE
380 bool "CE4100 TV platform"
381 depends on PCI
382 depends on PCI_GODIRECT
383 depends on X86_32
384 depends on X86_EXTENDED_PLATFORM
Dirk Brandewie37bc9f52010-11-09 12:08:08 -0800385 select X86_REBOOTFIXUPS
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +0100386 select OF
387 select OF_EARLY_FLATTREE
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800388 ---help---
389 Select for the Intel CE media processor (CE4100) SOC.
390 This option compiles in support for the CE4100 SOC for settop
391 boxes and media devices.
392
Alan Coxdd137522011-12-05 23:14:39 +0000393config X86_WANT_INTEL_MID
Alan Cox43605ef2011-07-12 17:49:29 +0100394 bool "Intel MID platform support"
395 depends on X86_32
396 depends on X86_EXTENDED_PLATFORM
397 ---help---
398 Select to build a kernel capable of supporting Intel MID platform
399 systems which do not have the PCI legacy interfaces (Moorestown,
400 Medfield). If you are building for a PC class system say N here.
401
Alan Coxdd137522011-12-05 23:14:39 +0000402if X86_WANT_INTEL_MID
Alan Cox43605ef2011-07-12 17:49:29 +0100403
Alan Cox4e2b1c42011-12-06 13:28:22 +0000404config X86_INTEL_MID
405 bool
406
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200407config X86_MRST
408 bool "Moorestown MID platform"
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800409 depends on PCI
410 depends on PCI_GOANY
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800411 depends on X86_IO_APIC
Jacob Panbb24c472009-09-02 07:37:17 -0700412 select APB_TIMER
Feng Tang1da4b1c2010-11-09 11:22:58 +0000413 select I2C
414 select SPI
Alan Coxb9fc71f2010-11-15 17:31:19 +0000415 select INTEL_SCU_IPC
Randy Dunlapad025192010-11-15 10:14:06 -0800416 select X86_PLATFORM_DEVICES
Alan Coxdd137522011-12-05 23:14:39 +0000417 select X86_INTEL_MID
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200418 ---help---
419 Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
420 Internet Device(MID) platform. Moorestown consists of two chips:
421 Lincroft (CPU core, graphics, and memory controller) and Langwell IOH.
422 Unlike standard x86 PCs, Moorestown does not have many legacy devices
423 nor standard legacy replacement devices/features. e.g. Moorestown does
424 not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
425
Alan Cox43605ef2011-07-12 17:49:29 +0100426endif
427
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800428config X86_RDC321X
429 bool "RDC R-321x SoC"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100430 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800431 depends on X86_EXTENDED_PLATFORM
432 select M486
433 select X86_REBOOTFIXUPS
434 ---help---
435 This option is needed for RDC R-321x system-on-chip, also known
436 as R-8610-(G).
437 If you don't have one of these chips, you should say N here.
438
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100439config X86_32_NON_STANDARD
Ingo Molnar9c398012009-01-27 18:24:57 +0100440 bool "Support non-standard 32-bit SMP architectures"
441 depends on X86_32 && SMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800442 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100443 ---help---
444 This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
Yinghai Lud49c4282008-06-08 18:31:54 -0700445 subarchitectures. It is intended for a generic binary kernel.
446 if you select them all, kernel will probe it one by one. and will
447 fallback to default.
448
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800449# Alphabetically sorted list of Non standard 32 bit platforms
Yinghai Lud49c4282008-06-08 18:31:54 -0700450
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100451config X86_NUMAQ
452 bool "NUMAQ (IBM/Sequent)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100453 depends on X86_32_NON_STANDARD
Pan, Jacob juna92d1522010-02-24 16:59:55 -0800454 depends on PCI
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100455 select NUMA
Ingo Molnar9c398012009-01-27 18:24:57 +0100456 select X86_MPPARSE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100457 ---help---
Yinghai Lud49c4282008-06-08 18:31:54 -0700458 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
459 NUMA multiquad box. This changes the way that processors are
460 bootstrapped, and uses Clustered Logical APIC addressing mode instead
461 of Flat Logical. You will need a new lynxer.elf file to flash your
462 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100463
Linus Torvaldsd949f362009-09-26 09:35:07 -0700464config X86_SUPPORTS_MEMORY_FAILURE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100465 def_bool y
Linus Torvaldsd949f362009-09-26 09:35:07 -0700466 # MCE code calls memory_failure():
467 depends on X86_MCE
468 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
469 depends on !X86_NUMAQ
470 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
471 depends on X86_64 || !SPARSEMEM
472 select ARCH_SUPPORTS_MEMORY_FAILURE
Linus Torvaldsd949f362009-09-26 09:35:07 -0700473
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200474config X86_VISWS
475 bool "SGI 320/540 (Visual Workstation)"
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800476 depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
477 depends on X86_32_NON_STANDARD
478 ---help---
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200479 The SGI Visual Workstation series is an IA32-based workstation
480 based on SGI systems chips with some legacy PC hardware attached.
481
482 Say Y here to create a kernel to run on the SGI 320 or 540.
483
484 A kernel compiled for the Visual Workstation will run on general
485 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
486
Ingo Molnar9c398012009-01-27 18:24:57 +0100487config X86_SUMMIT
488 bool "Summit/EXA (IBM x440)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100489 depends on X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100490 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100491 This option is needed for IBM systems that use the Summit/EXA chipset.
492 In particular, it is needed for the x440.
Ingo Molnar1f972762008-07-26 13:52:50 +0200493
Ingo Molnar9c398012009-01-27 18:24:57 +0100494config X86_ES7000
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800495 bool "Unisys ES7000 IA32 series"
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800496 depends on X86_32_NON_STANDARD && X86_BIGSMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100497 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100498 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
499 supposed to run on an IA32-based Unisys ES7000 system.
500
Shérab82148d12010-09-25 06:06:57 +0200501config X86_32_IRIS
502 tristate "Eurobraille/Iris poweroff module"
503 depends on X86_32
504 ---help---
505 The Iris machines from EuroBraille do not have APM or ACPI support
506 to shut themselves down properly. A special I/O sequence is
507 needed to do so, which is what this module does at
508 kernel shutdown.
509
510 This is only for Iris machines from EuroBraille.
511
512 If unused, say N.
513
Ingo Molnarae1e9132008-11-11 09:05:16 +0100514config SCHED_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100515 def_bool y
516 prompt "Single-depth WCHAN output"
Ken Chena87d0912008-11-06 11:10:49 -0800517 depends on X86
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100518 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100519 Calculate simpler /proc/<PID>/wchan values. If this option
520 is disabled then wchan values will recurse back to the
521 caller function. This provides more accurate wchan values,
522 at the expense of slightly more scheduling overhead.
523
524 If in doubt, say "Y".
525
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100526menuconfig PARAVIRT_GUEST
527 bool "Paravirtualized guest support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100528 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100529 Say Y here to get to see options related to running Linux under
530 various hypervisors. This option alone does not add any kernel code.
531
532 If you say N, all options in this submenu will be skipped and disabled.
533
534if PARAVIRT_GUEST
535
Glauber Costa095c0aa2011-07-11 15:28:18 -0400536config PARAVIRT_TIME_ACCOUNTING
537 bool "Paravirtual steal time accounting"
538 select PARAVIRT
539 default n
540 ---help---
541 Select this option to enable fine granularity task steal time
542 accounting. Time spent executing other tasks in parallel with
543 the current vCPU is discounted from the vCPU power. To account for
544 that, there can be a small performance impact.
545
546 If in doubt, say N here.
547
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100548source "arch/x86/xen/Kconfig"
549
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200550config KVM_CLOCK
551 bool "KVM paravirtualized clock"
552 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200553 select PARAVIRT_CLOCK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100554 ---help---
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200555 Turning on this option will allow you to run a paravirtualized clock
556 when running over the KVM hypervisor. Instead of relying on a PIT
557 (or probably other) emulation by the underlying device model, the host
558 provides the guest with timing infrastructure such as time of day, and
559 system time
560
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500561config KVM_GUEST
562 bool "KVM Guest support"
563 select PARAVIRT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100564 ---help---
565 This option enables various optimizations for running under the KVM
566 hypervisor.
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500567
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100568source "arch/x86/lguest/Kconfig"
569
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100570config PARAVIRT
571 bool "Enable paravirtualization code"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100572 ---help---
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100573 This changes the kernel so it can modify itself when it is run
574 under a hypervisor, potentially improving performance significantly
575 over full virtualization. However, when run without a hypervisor
576 the kernel is theoretically slower and slightly larger.
577
Jeremy Fitzhardingeb4ecc122009-05-13 17:16:55 -0700578config PARAVIRT_SPINLOCKS
579 bool "Paravirtualization layer for spinlocks"
580 depends on PARAVIRT && SMP && EXPERIMENTAL
581 ---help---
582 Paravirtualized spinlocks allow a pvops backend to replace the
583 spinlock implementation with something virtualization-friendly
584 (for example, block the virtual CPU rather than spinning).
585
586 Unfortunately the downside is an up to 5% performance hit on
587 native kernels, with various workloads.
588
589 If you are unsure how to answer this question, answer N.
590
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200591config PARAVIRT_CLOCK
592 bool
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200593
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100594endif
595
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400596config PARAVIRT_DEBUG
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100597 bool "paravirt-ops debugging"
598 depends on PARAVIRT && DEBUG_KERNEL
599 ---help---
600 Enable to debug paravirt_ops internals. Specifically, BUG if
601 a paravirt_op is missing when it is called.
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400602
Yinghai Lu08677212010-02-10 01:20:20 -0800603config NO_BOOTMEM
Yinghai Lu774ea0b2010-08-25 13:39:18 -0700604 def_bool y
Yinghai Lu08677212010-02-10 01:20:20 -0800605
Yinghai Lu03273182008-04-18 17:49:15 -0700606config MEMTEST
607 bool "Memtest"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100608 ---help---
Yinghai Luc64df702008-03-21 18:56:19 -0700609 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700610 to be set.
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100611 memtest=0, mean disabled; -- default
612 memtest=1, mean do 1 test pattern;
613 ...
614 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200615 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100616
617config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100618 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100619 depends on X86_32 && NUMA && X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100620
621config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100622 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100623 depends on X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100624
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100625source "arch/x86/Kconfig.cpu"
626
627config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100628 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100629 prompt "HPET Timer Support" if X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100630 ---help---
631 Use the IA-PC HPET (High Precision Event Timer) to manage
632 time in preference to the PIT and RTC, if a HPET is
633 present.
634 HPET is the next generation timer replacing legacy 8254s.
635 The HPET provides a stable time base on SMP
636 systems, unlike the TSC, but it is more expensive to access,
637 as it is off-chip. You can find the HPET spec at
638 <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100639
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100640 You can safely choose Y here. However, HPET will only be
641 activated if the platform and the BIOS support this feature.
642 Otherwise the 8254 will be used for timing services.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100643
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100644 Choose N to continue using the legacy 8254 timer.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100645
646config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100647 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800648 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100649
Jacob Panbb24c472009-09-02 07:37:17 -0700650config APB_TIMER
651 def_bool y if MRST
652 prompt "Langwell APB Timer Support" if X86_MRST
Jamie Iles06c3df42011-06-06 12:43:07 +0100653 select DW_APB_TIMER
Jacob Panbb24c472009-09-02 07:37:17 -0700654 help
655 APB timer is the replacement for 8254, HPET on X86 MID platforms.
656 The APBT provides a stable time base on SMP
657 systems, unlike the TSC, but it is more expensive to access,
658 as it is off-chip. APB timers are always running regardless of CPU
659 C states, they are used as per CPU clockevent device when possible.
660
David Rientjes6a108a12011-01-20 14:44:16 -0800661# Mark as expert because too many people got it wrong.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100662# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700663config DMI
664 default y
David Rientjes6a108a12011-01-20 14:44:16 -0800665 bool "Enable DMI scanning" if EXPERT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100666 ---help---
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700667 Enabled scanning of DMI to identify machine quirks. Say Y
668 here unless you have verified that your setup is not
669 affected by entries in the DMI blacklist. Required by PNP
670 BIOS code.
671
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100672config GART_IOMMU
David Rientjes6a108a12011-01-20 14:44:16 -0800673 bool "GART IOMMU support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100674 default y
675 select SWIOTLB
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +0200676 depends on X86_64 && PCI && AMD_NB
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100677 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100678 Support for full DMA access of devices with 32bit memory access only
679 on systems with more than 3GB. This is usually needed for USB,
680 sound, many IDE/SATA chipsets and some other devices.
681 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
682 based hardware IOMMU and a software bounce buffer based IOMMU used
683 on Intel systems and as fallback.
684 The code is only active when needed (enough memory and limited
685 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
686 too.
687
688config CALGARY_IOMMU
689 bool "IBM Calgary IOMMU support"
690 select SWIOTLB
691 depends on X86_64 && PCI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100692 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100693 Support for hardware IOMMUs in IBM's xSeries x366 and x460
694 systems. Needed to run systems with more than 3GB of memory
695 properly with 32-bit PCI devices that do not support DAC
696 (Double Address Cycle). Calgary also supports bus level
697 isolation, where all DMAs pass through the IOMMU. This
698 prevents them from going anywhere except their intended
699 destination. This catches hard-to-find kernel bugs and
700 mis-behaving drivers and devices that do not use the DMA-API
701 properly to set up their DMA buffers. The IOMMU can be
702 turned off at boot time with the iommu=off parameter.
703 Normally the kernel will make the right choice by itself.
704 If unsure, say Y.
705
706config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100707 def_bool y
708 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100709 depends on CALGARY_IOMMU
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100710 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100711 Should Calgary be enabled by default? if you choose 'y', Calgary
712 will be used (if it exists). If you choose 'n', Calgary will not be
713 used even if it exists. If you choose 'n' and would like to use
714 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
715 If unsure, say Y.
716
717# need this always selected by IOMMU for the VIA workaround
718config SWIOTLB
Joerg Roedela1afd012008-11-18 12:44:21 +0100719 def_bool y if X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100720 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100721 Support for software bounce buffers used on x86-64 systems
722 which don't have a hardware IOMMU (e.g. the current generation
723 of Intel's x86-64 CPUs). Using this PCI devices which can only
724 access 32-bits of memory can be used on systems with more than
725 3 GB of memory. If unsure, say Y.
726
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700727config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900728 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700729
Mike Travis1184dc22008-05-12 21:21:12 +0200730config MAXSMP
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200731 bool "Enable Maximum number of SMP Processors and NUMA Nodes"
Mike Travis36f51012008-12-16 17:33:51 -0800732 depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
733 select CPUMASK_OFFSTACK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100734 ---help---
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200735 Enable maximum number of CPUS and NUMA Nodes for this architecture.
Mike Travis1184dc22008-05-12 21:21:12 +0200736 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100737
738config NR_CPUS
Mike Travis36f51012008-12-16 17:33:51 -0800739 int "Maximum number of CPUs" if SMP && !MAXSMP
Michael K. Johnson2a3313f2009-04-21 21:44:48 -0400740 range 2 8 if SMP && X86_32 && !X86_BIGSMP
Mike Travis36f51012008-12-16 17:33:51 -0800741 range 2 512 if SMP && !MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800742 default "1" if !SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700743 default "4096" if MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800744 default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
745 default "8" if SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100746 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100747 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700748 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100749 minimum value which makes sense is 2.
750
751 This is purely to save memory - each supported CPU adds
752 approximately eight kilobytes to the kernel image.
753
754config SCHED_SMT
755 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800756 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100757 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100758 SMT scheduler support improves the CPU scheduler's decision making
759 when dealing with Intel Pentium 4 chips with HyperThreading at a
760 cost of slightly increased overhead in some places. If unsure say
761 N here.
762
763config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100764 def_bool y
765 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800766 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100767 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100768 Multi-core scheduler support improves the CPU scheduler's decision
769 making when dealing with multi-core CPU chips at a cost of slightly
770 increased overhead in some places. If unsure say N here.
771
Venkatesh Pallipadie82b8e42010-10-04 17:03:20 -0700772config IRQ_TIME_ACCOUNTING
773 bool "Fine granularity task level IRQ time accounting"
774 default n
775 ---help---
776 Select this option to enable fine granularity task irq time
777 accounting. This is done by reading a timestamp on each
778 transitions between softirq and hardirq state, so there can be a
779 small performance impact.
780
781 If in doubt, say N here.
782
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100783source "kernel/Kconfig.preempt"
784
785config X86_UP_APIC
786 bool "Local APIC support on uniprocessors"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100787 depends on X86_32 && !SMP && !X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100788 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100789 A local APIC (Advanced Programmable Interrupt Controller) is an
790 integrated interrupt controller in the CPU. If you have a single-CPU
791 system which has a processor with a local APIC, you can say Y here to
792 enable and use it. If you say Y here even though your machine doesn't
793 have a local APIC, then the kernel will still run with no slowdown at
794 all. The local APIC supports CPU-generated self-interrupts (timer,
795 performance counters), and the NMI watchdog which detects hard
796 lockups.
797
798config X86_UP_IOAPIC
799 bool "IO-APIC support on uniprocessors"
800 depends on X86_UP_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100801 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100802 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
803 SMP-capable replacement for PC-style interrupt controllers. Most
804 SMP systems and many recent uniprocessor systems have one.
805
806 If you have a single-CPU system with an IO-APIC, you can say Y here
807 to use it. If you say Y here even though your machine doesn't have
808 an IO-APIC, then the kernel will still run with no slowdown at all.
809
810config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100811 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100812 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100813
814config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100815 def_bool y
Henrik Kretzschmar1444e0c2011-02-22 15:38:07 +0100816 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100817
818config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100819 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100820 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100821
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200822config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
823 bool "Reroute for broken boot IRQs"
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200824 depends on X86_IO_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100825 ---help---
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200826 This option enables a workaround that fixes a source of
827 spurious interrupts. This is recommended when threaded
828 interrupt handling is used on systems where the generation of
829 superfluous "boot interrupts" cannot be disabled.
830
831 Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
832 entry in the chipset's IO-APIC is masked (as, e.g. the RT
833 kernel does during interrupt handling). On chipsets where this
834 boot IRQ generation cannot be disabled, this workaround keeps
835 the original IRQ line masked so that only the equivalent "boot
836 IRQ" is delivered to the CPUs. The workaround also tells the
837 kernel to set up the IRQ handler on the boot IRQ line. In this
838 way only one interrupt is delivered to the kernel. Otherwise
839 the spurious second interrupt may cause the kernel to bring
840 down (vital) interrupt lines.
841
842 Only affects "broken" chipsets. Interrupt sharing may be
843 increased on these systems.
844
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100845config X86_MCE
Andi Kleenbab9bc62009-07-09 00:31:38 +0200846 bool "Machine Check / overheating reporting"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100847 ---help---
Andi Kleenbab9bc62009-07-09 00:31:38 +0200848 Machine Check support allows the processor to notify the
849 kernel if it detects a problem (e.g. overheating, data corruption).
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100850 The action the kernel takes depends on the severity of the problem,
Andi Kleenbab9bc62009-07-09 00:31:38 +0200851 ranging from warning messages to halting the machine.
Andi Kleen4efc0672009-04-28 19:07:31 +0200852
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100853config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100854 def_bool y
855 prompt "Intel MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200856 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100857 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100858 Additional support for intel specific MCE features such as
859 the thermal monitor.
860
861config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100862 def_bool y
863 prompt "AMD MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200864 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100865 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100866 Additional support for AMD specific MCE features such as
867 the DRAM Error Threshold.
868
Andi Kleen4efc0672009-04-28 19:07:31 +0200869config X86_ANCIENT_MCE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100870 bool "Support for old Pentium 5 / WinChip machine checks"
Andi Kleenc31d9632009-07-09 00:31:37 +0200871 depends on X86_32 && X86_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900872 ---help---
873 Include support for machine check handling on old Pentium 5 or WinChip
874 systems. These typically need to be enabled explicitely on the command
875 line.
Andi Kleen4efc0672009-04-28 19:07:31 +0200876
Andi Kleenb2762682009-02-12 13:49:31 +0100877config X86_MCE_THRESHOLD
878 depends on X86_MCE_AMD || X86_MCE_INTEL
Jan Beulich6fc108a2010-04-21 15:23:44 +0100879 def_bool y
Andi Kleenb2762682009-02-12 13:49:31 +0100880
Andi Kleenea149b32009-04-29 19:31:00 +0200881config X86_MCE_INJECT
Andi Kleenc1ebf832009-07-09 00:31:41 +0200882 depends on X86_MCE
Andi Kleenea149b32009-04-29 19:31:00 +0200883 tristate "Machine check injector support"
884 ---help---
885 Provide support for injecting machine checks for testing purposes.
886 If you don't know what a machine check is and you don't do kernel
887 QA it is safe to say n.
888
Andi Kleen4efc0672009-04-28 19:07:31 +0200889config X86_THERMAL_VECTOR
890 def_bool y
Andi Kleen5bb38ad2009-07-09 00:31:39 +0200891 depends on X86_MCE_INTEL
Andi Kleen4efc0672009-04-28 19:07:31 +0200892
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100893config VM86
David Rientjes6a108a12011-01-20 14:44:16 -0800894 bool "Enable VM86 support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100895 default y
896 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100897 ---help---
898 This option is required by programs like DOSEMU to run 16-bit legacy
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100899 code on X86 processors. It also may be needed by software like
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100900 XFree86 to initialize some video cards via BIOS. Disabling this
901 option saves about 6k.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100902
903config TOSHIBA
904 tristate "Toshiba Laptop support"
905 depends on X86_32
906 ---help---
907 This adds a driver to safely access the System Management Mode of
908 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
909 not work on models with a Phoenix BIOS. The System Management Mode
910 is used to set the BIOS and power saving options on Toshiba portables.
911
912 For information on utilities to make use of this driver see the
913 Toshiba Linux utilities web site at:
914 <http://www.buzzard.org.uk/toshiba/>.
915
916 Say Y if you intend to run this kernel on a Toshiba portable.
917 Say N otherwise.
918
919config I8K
920 tristate "Dell laptop support"
Jean Delvare949a9d72011-05-25 20:43:33 +0200921 select HWMON
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100922 ---help---
923 This adds a driver to safely access the System Management Mode
924 of the CPU on the Dell Inspiron 8000. The System Management Mode
925 is used to read cpu temperature and cooling fan status and to
926 control the fans on the I8K portables.
927
928 This driver has been tested only on the Inspiron 8000 but it may
929 also work with other Dell laptops. You can force loading on other
930 models by passing the parameter `force=1' to the module. Use at
931 your own risk.
932
933 For information on utilities to make use of this driver see the
934 I8K Linux utilities web site at:
935 <http://people.debian.org/~dz/i8k/>
936
937 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
938 Say N otherwise.
939
940config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700941 bool "Enable X86 board specific fixups for reboot"
942 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100943 ---help---
944 This enables chipset and/or board specific fixups to be done
945 in order to get reboot to work correctly. This is only needed on
946 some combinations of hardware and BIOS. The symptom, for which
947 this config is intended, is when reboot ends with a stalled/hung
948 system.
949
950 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100951 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100952
953 Say Y if you want to enable the fixup. Currently, it's safe to
954 enable this option even if you don't need it.
955 Say N otherwise.
956
957config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200958 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100959 select FW_LOADER
960 ---help---
961 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200962 certain Intel and AMD processors. The Intel support is for the
963 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
964 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
965 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
966 You will obviously need the actual microcode binary data itself
967 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100968
Peter Oruba8d86f392008-07-28 18:44:21 +0200969 This option selects the general module only, you need to select
970 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100971
972 To compile this driver as a module, choose M here: the
973 module will be called microcode.
974
Peter Oruba8d86f392008-07-28 18:44:21 +0200975config MICROCODE_INTEL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100976 bool "Intel microcode patch loading support"
977 depends on MICROCODE
978 default MICROCODE
979 select FW_LOADER
980 ---help---
981 This options enables microcode patch loading support for Intel
982 processors.
Peter Oruba8d86f392008-07-28 18:44:21 +0200983
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100984 For latest news and information on obtaining all the required
985 Intel ingredients for this driver, check:
986 <http://www.urbanmyth.org/microcode/>.
Peter Oruba8d86f392008-07-28 18:44:21 +0200987
Peter Oruba80cc9f12008-07-28 18:44:22 +0200988config MICROCODE_AMD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100989 bool "AMD microcode patch loading support"
990 depends on MICROCODE
991 select FW_LOADER
992 ---help---
993 If you select this option, microcode patch loading support for AMD
994 processors will be enabled.
Peter Oruba80cc9f12008-07-28 18:44:22 +0200995
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100996config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100997 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100998 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100999
1000config X86_MSR
1001 tristate "/dev/cpu/*/msr - Model-specific register support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001002 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001003 This device gives privileged processes access to the x86
1004 Model-Specific Registers (MSRs). It is a character device with
1005 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
1006 MSR accesses are directed to a specific CPU on multi-processor
1007 systems.
1008
1009config X86_CPUID
1010 tristate "/dev/cpu/*/cpuid - CPU information support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001011 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001012 This device gives processes access to the x86 CPUID instruction to
1013 be executed on a specific processor. It is a character device
1014 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
1015 /dev/cpu/31/cpuid.
1016
1017choice
1018 prompt "High Memory Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001019 default HIGHMEM64G if X86_NUMAQ
Jan Beulich6fc108a2010-04-21 15:23:44 +01001020 default HIGHMEM4G
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001021 depends on X86_32
1022
1023config NOHIGHMEM
1024 bool "off"
1025 depends on !X86_NUMAQ
1026 ---help---
1027 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
1028 However, the address space of 32-bit x86 processors is only 4
1029 Gigabytes large. That means that, if you have a large amount of
1030 physical memory, not all of it can be "permanently mapped" by the
1031 kernel. The physical memory that's not permanently mapped is called
1032 "high memory".
1033
1034 If you are compiling a kernel which will never run on a machine with
1035 more than 1 Gigabyte total physical RAM, answer "off" here (default
1036 choice and suitable for most users). This will result in a "3GB/1GB"
1037 split: 3GB are mapped so that each process sees a 3GB virtual memory
1038 space and the remaining part of the 4GB virtual memory space is used
1039 by the kernel to permanently map as much physical memory as
1040 possible.
1041
1042 If the machine has between 1 and 4 Gigabytes physical RAM, then
1043 answer "4GB" here.
1044
1045 If more than 4 Gigabytes is used then answer "64GB" here. This
1046 selection turns Intel PAE (Physical Address Extension) mode on.
1047 PAE implements 3-level paging on IA32 processors. PAE is fully
1048 supported by Linux, PAE mode is implemented on all recent Intel
1049 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
1050 then the kernel will not boot on CPUs that don't support PAE!
1051
1052 The actual amount of total physical memory will either be
1053 auto detected or can be forced by using a kernel command line option
1054 such as "mem=256M". (Try "man bootparam" or see the documentation of
1055 your boot loader (lilo or loadlin) about how to pass options to the
1056 kernel at boot time.)
1057
1058 If unsure, say "off".
1059
1060config HIGHMEM4G
1061 bool "4GB"
1062 depends on !X86_NUMAQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001063 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001064 Select this if you have a 32-bit processor and between 1 and 4
1065 gigabytes of physical RAM.
1066
1067config HIGHMEM64G
1068 bool "64GB"
1069 depends on !M386 && !M486
1070 select X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001071 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001072 Select this if you have a 32-bit processor and more than 4
1073 gigabytes of physical RAM.
1074
1075endchoice
1076
1077choice
1078 depends on EXPERIMENTAL
David Rientjes6a108a12011-01-20 14:44:16 -08001079 prompt "Memory split" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001080 default VMSPLIT_3G
1081 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001082 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001083 Select the desired split between kernel and user memory.
1084
1085 If the address range available to the kernel is less than the
1086 physical memory installed, the remaining memory will be available
1087 as "high memory". Accessing high memory is a little more costly
1088 than low memory, as it needs to be mapped into the kernel first.
1089 Note that increasing the kernel address space limits the range
1090 available to user programs, making the address space there
1091 tighter. Selecting anything other than the default 3G/1G split
1092 will also likely make your kernel incompatible with binary-only
1093 kernel modules.
1094
1095 If you are not absolutely sure what you are doing, leave this
1096 option alone!
1097
1098 config VMSPLIT_3G
1099 bool "3G/1G user/kernel split"
1100 config VMSPLIT_3G_OPT
1101 depends on !X86_PAE
1102 bool "3G/1G user/kernel split (for full 1G low memory)"
1103 config VMSPLIT_2G
1104 bool "2G/2G user/kernel split"
1105 config VMSPLIT_2G_OPT
1106 depends on !X86_PAE
1107 bool "2G/2G user/kernel split (for full 2G low memory)"
1108 config VMSPLIT_1G
1109 bool "1G/3G user/kernel split"
1110endchoice
1111
1112config PAGE_OFFSET
1113 hex
1114 default 0xB0000000 if VMSPLIT_3G_OPT
1115 default 0x80000000 if VMSPLIT_2G
1116 default 0x78000000 if VMSPLIT_2G_OPT
1117 default 0x40000000 if VMSPLIT_1G
1118 default 0xC0000000
1119 depends on X86_32
1120
1121config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001122 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001123 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001124
1125config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -07001126 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001127 depends on X86_32 && !HIGHMEM4G
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001128 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001129 PAE is required for NX support, and furthermore enables
1130 larger swapspace support for non-overcommit purposes. It
1131 has the cost of more pagetable lookup overhead, and also
1132 consumes more pagetable space per process.
1133
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001134config ARCH_PHYS_ADDR_T_64BIT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001135 def_bool X86_64 || X86_PAE
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001136
FUJITA Tomonori66f2b062010-10-20 15:55:35 -07001137config ARCH_DMA_ADDR_T_64BIT
1138 def_bool X86_64 || HIGHMEM64G
1139
Nick Piggin9e899812008-10-22 12:33:16 +02001140config DIRECT_GBPAGES
David Rientjes6a108a12011-01-20 14:44:16 -08001141 bool "Enable 1GB pages for kernel pagetables" if EXPERT
Nick Piggin9e899812008-10-22 12:33:16 +02001142 default y
1143 depends on X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001144 ---help---
Nick Piggin9e899812008-10-22 12:33:16 +02001145 Allow the kernel linear mapping to use 1GB pages on CPUs that
1146 support it. This can improve the kernel's performance a tiny bit by
1147 reducing TLB pressure. If in doubt, say "Y".
1148
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001149# Common NUMA Features
1150config NUMA
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001151 bool "Numa Memory Allocation and Scheduler Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001152 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +01001153 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Yinghai Lu0699eae2008-06-17 15:39:01 -07001154 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001155 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001156 Enable NUMA (Non Uniform Memory Access) support.
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001157
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001158 The kernel will try to allocate memory used by a CPU on the
1159 local memory controller of the CPU and add some more
1160 NUMA awareness to the kernel.
1161
Ingo Molnarc280ea52008-11-08 13:29:45 +01001162 For 64-bit this is recommended if the system is Intel Core i7
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001163 (or later), AMD Opteron, or EM64T NUMA.
1164
1165 For 32-bit this is only needed on (rare) 32-bit-only platforms
1166 that support NUMA topologies, such as NUMAQ / Summit, or if you
1167 boot a 32-bit kernel on a 64-bit NUMA platform.
1168
1169 Otherwise, you should say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001170
1171comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
1172 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
1173
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001174config AMD_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001175 def_bool y
1176 prompt "Old style AMD Opteron NUMA detection"
Tejun Heo5da0ef92011-07-11 10:34:32 +02001177 depends on X86_64 && NUMA && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001178 ---help---
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001179 Enable AMD NUMA node topology detection. You should say Y here if
1180 you have a multi processor AMD system. This uses an old method to
1181 read the NUMA configuration directly from the builtin Northbridge
1182 of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
1183 which also takes priority if both are compiled in.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001184
1185config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001186 def_bool y
1187 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001188 depends on X86_64 && NUMA && ACPI && PCI
1189 select ACPI_NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001190 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001191 Enable ACPI SRAT based node topology detection.
1192
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001193# Some NUMA nodes have memory ranges that span
1194# other nodes. Even though a pfn is valid and
1195# between a node's start and end pfns, it may not
1196# reside on that node. See memmap_init_zone()
1197# for details.
1198config NODES_SPAN_OTHER_NODES
1199 def_bool y
1200 depends on X86_64_ACPI_NUMA
1201
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001202config NUMA_EMU
1203 bool "NUMA emulation"
Tejun Heo1b7e03e2011-05-02 17:24:48 +02001204 depends on NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001205 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001206 Enable NUMA emulation. A flat machine will be split
1207 into virtual nodes when booted with "numa=fake=N", where N is the
1208 number of nodes. This is only useful for debugging.
1209
1210config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001211 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
David Rientjes51591e32010-03-25 15:39:27 -07001212 range 1 10
1213 default "10" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001214 default "6" if X86_64
1215 default "4" if X86_NUMAQ
1216 default "3"
1217 depends on NEED_MULTIPLE_NODES
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001218 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +02001219 Specify the maximum number of NUMA Nodes available on the target
Matt LaPlante692105b2009-01-26 11:12:25 +01001220 system. Increases memory reserved to accommodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001221
Tejun Heoc1329372009-02-24 11:57:20 +09001222config HAVE_ARCH_BOOTMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001223 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001224 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001225
Tejun Heo3b166512011-04-01 11:15:12 +02001226config HAVE_ARCH_ALLOC_REMAP
1227 def_bool y
1228 depends on X86_32 && NUMA
1229
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001230config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001231 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001232 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001233
1234config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001235 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001236 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001237
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001238config ARCH_FLATMEM_ENABLE
1239 def_bool y
Tejun Heo3b166512011-04-01 11:15:12 +02001240 depends on X86_32 && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001241
1242config ARCH_DISCONTIGMEM_ENABLE
1243 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001244 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001245
1246config ARCH_DISCONTIGMEM_DEFAULT
1247 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001248 depends on NUMA && X86_32
1249
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001250config ARCH_SPARSEMEM_ENABLE
1251 def_bool y
Yinghai Lu4272ebf2009-01-29 15:14:46 -08001252 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001253 select SPARSEMEM_STATIC if X86_32
1254 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1255
Tejun Heo3b166512011-04-01 11:15:12 +02001256config ARCH_SPARSEMEM_DEFAULT
1257 def_bool y
1258 depends on X86_64
1259
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001260config ARCH_SELECT_MEMORY_MODEL
1261 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001262 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001263
1264config ARCH_MEMORY_PROBE
1265 def_bool X86_64
1266 depends on MEMORY_HOTPLUG
1267
Tejun Heo3b166512011-04-01 11:15:12 +02001268config ARCH_PROC_KCORE_TEXT
1269 def_bool y
1270 depends on X86_64 && PROC_KCORE
1271
Avi Kivitya29815a2010-01-10 16:28:09 +02001272config ILLEGAL_POINTER_VALUE
1273 hex
1274 default 0 if X86_32
1275 default 0xdead000000000000 if X86_64
1276
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001277source "mm/Kconfig"
1278
1279config HIGHPTE
1280 bool "Allocate 3rd-level pagetables from highmem"
Jan Beulich6fc108a2010-04-21 15:23:44 +01001281 depends on HIGHMEM
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001282 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001283 The VM uses one page table entry for each page of physical memory.
1284 For systems with a lot of RAM, this can be wasteful of precious
1285 low memory. Setting this option will put user-space page table
1286 entries in high memory.
1287
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001288config X86_CHECK_BIOS_CORRUPTION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001289 bool "Check for low memory corruption"
1290 ---help---
1291 Periodically check for memory corruption in low memory, which
1292 is suspected to be caused by BIOS. Even when enabled in the
1293 configuration, it is disabled at runtime. Enable it by
1294 setting "memory_corruption_check=1" on the kernel command
1295 line. By default it scans the low 64k of memory every 60
1296 seconds; see the memory_corruption_check_size and
1297 memory_corruption_check_period parameters in
1298 Documentation/kernel-parameters.txt to adjust this.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001299
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001300 When enabled with the default parameters, this option has
1301 almost no overhead, as it reserves a relatively small amount
1302 of memory and scans it infrequently. It both detects corruption
1303 and prevents it from affecting the running system.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001304
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001305 It is, however, intended as a diagnostic tool; if repeatable
1306 BIOS-originated corruption always affects the same memory,
1307 you can use memmap= to prevent the kernel from using that
1308 memory.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001309
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001310config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001311 bool "Set the default setting of memory_corruption_check"
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001312 depends on X86_CHECK_BIOS_CORRUPTION
1313 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001314 ---help---
1315 Set whether the default state of memory_corruption_check is
1316 on or off.
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001317
H. Peter Anvin9ea77bd2010-08-25 16:38:20 -07001318config X86_RESERVE_LOW
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001319 int "Amount of low memory, in kilobytes, to reserve for the BIOS"
1320 default 64
1321 range 4 640
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001322 ---help---
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001323 Specify the amount of low memory to reserve for the BIOS.
Ingo Molnarfc381512008-09-16 10:07:34 +02001324
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001325 The first page contains BIOS data structures that the kernel
1326 must not use, so that page must always be reserved.
Ingo Molnarfc381512008-09-16 10:07:34 +02001327
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001328 By default we reserve the first 64K of physical RAM, as a
1329 number of BIOSes are known to corrupt that memory range
1330 during events such as suspend/resume or monitor cable
1331 insertion, so it must not be used by the kernel.
Ingo Molnarfc381512008-09-16 10:07:34 +02001332
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001333 You can set this to 4 if you are absolutely sure that you
1334 trust the BIOS to get all its memory reservations and usages
1335 right. If you know your BIOS have problems beyond the
1336 default 64K area, you can set this to 640 to avoid using the
1337 entire low memory range.
1338
1339 If you have doubts about the BIOS (e.g. suspend/resume does
1340 not work or there's kernel crashes after certain hardware
1341 hotplug events) then you might want to enable
1342 X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check
1343 typical corruption patterns.
1344
1345 Leave this to the default value of 64 if you are unsure.
Ingo Molnarfc381512008-09-16 10:07:34 +02001346
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001347config MATH_EMULATION
1348 bool
1349 prompt "Math emulation" if X86_32
1350 ---help---
1351 Linux can emulate a math coprocessor (used for floating point
1352 operations) if you don't have one. 486DX and Pentium processors have
1353 a math coprocessor built in, 486SX and 386 do not, unless you added
1354 a 487DX or 387, respectively. (The messages during boot time can
1355 give you some hints here ["man dmesg"].) Everyone needs either a
1356 coprocessor or this emulation.
1357
1358 If you don't have a math coprocessor, you need to say Y here; if you
1359 say Y here even though you have a coprocessor, the coprocessor will
1360 be used nevertheless. (This behavior can be changed with the kernel
1361 command line option "no387", which comes handy if your coprocessor
1362 is broken. Try "man bootparam" or see the documentation of your boot
1363 loader (lilo or loadlin) about how to pass options to the kernel at
1364 boot time.) This means that it is a good idea to say Y here if you
1365 intend to use this kernel on different machines.
1366
1367 More information about the internals of the Linux math coprocessor
1368 emulation can be found in <file:arch/x86/math-emu/README>.
1369
1370 If you are not sure, say Y; apart from resulting in a 66 KB bigger
1371 kernel, it won't hurt.
1372
1373config MTRR
Jan Beulich6fc108a2010-04-21 15:23:44 +01001374 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001375 prompt "MTRR (Memory Type Range Register) support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001376 ---help---
1377 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1378 the Memory Type Range Registers (MTRRs) may be used to control
1379 processor access to memory ranges. This is most useful if you have
1380 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1381 allows bus write transfers to be combined into a larger transfer
1382 before bursting over the PCI/AGP bus. This can increase performance
1383 of image write operations 2.5 times or more. Saying Y here creates a
1384 /proc/mtrr file which may be used to manipulate your processor's
1385 MTRRs. Typically the X server should use this.
1386
1387 This code has a reasonably generic interface so that similar
1388 control registers on other processors can be easily supported
1389 as well:
1390
1391 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1392 Registers (ARRs) which provide a similar functionality to MTRRs. For
1393 these, the ARRs are used to emulate the MTRRs.
1394 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1395 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1396 write-combining. All of these processors are supported by this code
1397 and it makes sense to say Y here if you have one of them.
1398
1399 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1400 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1401 can lead to all sorts of problems, so it's good to say Y here.
1402
1403 You can safely say Y even if your machine doesn't have MTRRs, you'll
1404 just add about 9 KB to your kernel.
1405
Randy Dunlap7225e752008-07-26 17:54:22 -07001406 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001407
Yinghai Lu95ffa242008-04-29 03:52:33 -07001408config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001409 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001410 prompt "MTRR cleanup support"
1411 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001412 ---help---
Thomas Gleixneraba37282008-07-15 14:48:48 +02001413 Convert MTRR layout from continuous to discrete, so X drivers can
1414 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001415
Thomas Gleixneraba37282008-07-15 14:48:48 +02001416 Can be disabled with disable_mtrr_cleanup on the kernel command line.
Matt LaPlante692105b2009-01-26 11:12:25 +01001417 The largest mtrr entry size for a continuous block can be set with
Thomas Gleixneraba37282008-07-15 14:48:48 +02001418 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001419
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001420 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001421
1422config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001423 int "MTRR cleanup enable value (0-1)"
1424 range 0 1
1425 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001426 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001427 ---help---
Yinghai Luf5098d62008-04-29 20:25:58 -07001428 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001429
Yinghai Lu12031a62008-05-02 02:40:22 -07001430config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1431 int "MTRR cleanup spare reg num (0-7)"
1432 range 0 7
1433 default "1"
1434 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001435 ---help---
Yinghai Lu12031a62008-05-02 02:40:22 -07001436 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001437 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001438
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001439config X86_PAT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001440 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001441 prompt "x86 PAT support" if EXPERT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001442 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001443 ---help---
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001444 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001445
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001446 PATs are the modern equivalents of MTRRs and are much more
1447 flexible than MTRRs.
1448
1449 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001450 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001451
1452 If unsure, say Y.
1453
Venkatesh Pallipadi46cf98c2009-07-10 09:57:37 -07001454config ARCH_USES_PG_UNCACHED
1455 def_bool y
1456 depends on X86_PAT
1457
H. Peter Anvin628c6242011-07-31 13:59:29 -07001458config ARCH_RANDOM
1459 def_bool y
1460 prompt "x86 architectural random number generator" if EXPERT
1461 ---help---
1462 Enable the x86 architectural RDRAND instruction
1463 (Intel Bull Mountain technology) to generate random numbers.
1464 If supported, this is a high bandwidth, cryptographically
1465 secure hardware random number generator.
1466
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001467config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001468 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001469 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001470 ---help---
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001471 This enables the kernel to use EFI runtime services that are
1472 available (such as the EFI variable services).
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001473
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001474 This option is only useful on systems that have EFI firmware.
1475 In addition, you should use the latest ELILO loader available
1476 at <http://elilo.sourceforge.net> in order to take advantage
1477 of EFI runtime services. However, even with this option, the
1478 resultant kernel should continue to boot on existing non-EFI
1479 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001480
Matt Fleming291f3632011-12-12 21:27:52 +00001481config EFI_STUB
1482 bool "EFI stub support"
1483 depends on EFI
1484 ---help---
1485 This kernel feature allows a bzImage to be loaded directly
1486 by EFI firmware without the use of a bootloader.
1487
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001488config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001489 def_bool y
1490 prompt "Enable seccomp to safely compute untrusted bytecode"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001491 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001492 This kernel feature is useful for number crunching applications
1493 that may need to compute untrusted bytecode during their
1494 execution. By using pipes or other transports made available to
1495 the process as file descriptors supporting the read/write
1496 syscalls, it's possible to isolate those applications in
1497 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001498 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001499 and the task is only allowed to execute a few safe syscalls
1500 defined by each seccomp mode.
1501
1502 If unsure, say Y. Only embedded should say N here.
1503
1504config CC_STACKPROTECTOR
1505 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001506 ---help---
1507 This option turns on the -fstack-protector GCC feature. This
Ingo Molnar113c5412008-02-14 10:36:03 +01001508 feature puts, at the beginning of functions, a canary value on
1509 the stack just before the return address, and validates
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001510 the value just before actually returning. Stack based buffer
1511 overflows (that need to overwrite this return address) now also
1512 overwrite the canary, which gets detected and the attack is then
1513 neutralized via a kernel panic.
1514
1515 This feature requires gcc version 4.2 or above, or a distribution
1516 gcc with the feature backported. Older versions are automatically
Ingo Molnar113c5412008-02-14 10:36:03 +01001517 detected and for those versions, this configuration option is
1518 ignored. (and a warning is printed during bootup)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001519
1520source kernel/Kconfig.hz
1521
1522config KEXEC
1523 bool "kexec system call"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001524 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001525 kexec is a system call that implements the ability to shutdown your
1526 current kernel, and to start another kernel. It is like a reboot
1527 but it is independent of the system firmware. And like a reboot
1528 you can start any kernel with it, not just Linux.
1529
1530 The name comes from the similarity to the exec system call.
1531
1532 It is an ongoing process to be certain the hardware in a machine
1533 is properly shutdown, so do not be surprised if this code does not
1534 initially work for you. It may help to enable device hotplugging
1535 support. As of this writing the exact hardware interface is
1536 strongly in flux, so no good recommendation can be made.
1537
1538config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001539 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001540 depends on X86_64 || (X86_32 && HIGHMEM)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001541 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001542 Generate crash dump after being started by kexec.
1543 This should be normally only set in special crash dump kernels
1544 which are loaded in the main kernel with kexec-tools into
1545 a specially reserved region and then later executed after
1546 a crash by kdump/kexec. The crash dump kernel must be compiled
1547 to a memory address not used by the main kernel or BIOS using
1548 PHYSICAL_START, or it must be built as a relocatable image
1549 (CONFIG_RELOCATABLE=y).
1550 For more details see Documentation/kdump/kdump.txt
1551
Huang Ying3ab83522008-07-25 19:45:07 -07001552config KEXEC_JUMP
1553 bool "kexec jump (EXPERIMENTAL)"
1554 depends on EXPERIMENTAL
Huang Yingfee7b0d2009-03-10 10:57:16 +08001555 depends on KEXEC && HIBERNATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001556 ---help---
Huang Ying89081d12008-07-25 19:45:10 -07001557 Jump between original kernel and kexeced kernel and invoke
1558 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001559
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001560config PHYSICAL_START
David Rientjes6a108a12011-01-20 14:44:16 -08001561 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001562 default "0x1000000"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001563 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001564 This gives the physical address where the kernel is loaded.
1565
1566 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1567 bzImage will decompress itself to above physical address and
1568 run from there. Otherwise, bzImage will run from the address where
1569 it has been loaded by the boot loader and will ignore above physical
1570 address.
1571
1572 In normal kdump cases one does not have to set/change this option
1573 as now bzImage can be compiled as a completely relocatable image
1574 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1575 address. This option is mainly useful for the folks who don't want
1576 to use a bzImage for capturing the crash dump and want to use a
1577 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1578 to be specifically compiled to run from a specific memory area
1579 (normally a reserved region) and this option comes handy.
1580
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001581 So if you are using bzImage for capturing the crash dump,
1582 leave the value here unchanged to 0x1000000 and set
1583 CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
1584 for capturing the crash dump change this value to start of
1585 the reserved region. In other words, it can be set based on
1586 the "X" value as specified in the "crashkernel=YM@XM"
1587 command line boot parameter passed to the panic-ed
1588 kernel. Please take a look at Documentation/kdump/kdump.txt
1589 for more details about crash dumps.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001590
1591 Usage of bzImage for capturing the crash dump is recommended as
1592 one does not have to build two kernels. Same kernel can be used
1593 as production kernel and capture kernel. Above option should have
1594 gone away after relocatable bzImage support is introduced. But it
1595 is present because there are users out there who continue to use
1596 vmlinux for dump capture. This option should go away down the
1597 line.
1598
1599 Don't change this unless you know what you are doing.
1600
1601config RELOCATABLE
H. Peter Anvin26717802009-05-07 14:19:34 -07001602 bool "Build a relocatable kernel"
1603 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001604 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001605 This builds a kernel image that retains relocation information
1606 so it can be loaded someplace besides the default 1MB.
1607 The relocations tend to make the kernel binary about 10% larger,
1608 but are discarded at runtime.
1609
1610 One use is for the kexec on panic case where the recovery kernel
1611 must live at a different physical address than the primary
1612 kernel.
1613
1614 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1615 it has been loaded at and the compile time physical address
1616 (CONFIG_PHYSICAL_START) is ignored.
1617
H. Peter Anvin845adf72009-05-05 21:20:51 -07001618# Relocation on x86-32 needs some additional build support
1619config X86_NEED_RELOCS
1620 def_bool y
1621 depends on X86_32 && RELOCATABLE
1622
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001623config PHYSICAL_ALIGN
Jan Beulich6fc108a2010-04-21 15:23:44 +01001624 hex "Alignment value to which kernel should be aligned" if X86_32
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001625 default "0x1000000"
1626 range 0x2000 0x1000000
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001627 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001628 This value puts the alignment restrictions on physical address
1629 where kernel is loaded and run from. Kernel is compiled for an
1630 address which meets above alignment restriction.
1631
1632 If bootloader loads the kernel at a non-aligned address and
1633 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1634 address aligned to above value and run from there.
1635
1636 If bootloader loads the kernel at a non-aligned address and
1637 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1638 load address and decompress itself to the address it has been
1639 compiled for and run from there. The address for which kernel is
1640 compiled already meets above alignment restrictions. Hence the
1641 end result is that kernel runs from a physical address meeting
1642 above alignment restrictions.
1643
1644 Don't change this unless you know what you are doing.
1645
1646config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001647 bool "Support for hot-pluggable CPUs"
Ingo Molnar4b19ed912009-01-27 17:47:24 +01001648 depends on SMP && HOTPLUG
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001649 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001650 Say Y here to allow turning CPUs off and on. CPUs can be
1651 controlled through /sys/devices/system/cpu.
1652 ( Note: power management support will enable this option
1653 automatically on SMP systems. )
1654 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001655
1656config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001657 def_bool y
1658 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001659 depends on X86_32 || IA32_EMULATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001660 ---help---
Roland McGrathaf65d642008-01-30 13:30:43 +01001661 Map the 32-bit VDSO to the predictable old-style address too.
Randy Dunlape84446d2009-11-10 15:46:52 -08001662
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001663 Say N here if you are running a sufficiently recent glibc
1664 version (2.3.3 or later), to remove the high-mapped
1665 VDSO mapping and to exclusively use the randomized VDSO.
1666
1667 If unsure, say Y.
1668
Tim Bird516cbf32008-08-12 12:52:36 -07001669config CMDLINE_BOOL
1670 bool "Built-in kernel command line"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001671 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001672 Allow for specifying boot arguments to the kernel at
1673 build time. On some systems (e.g. embedded ones), it is
1674 necessary or convenient to provide some or all of the
1675 kernel boot arguments with the kernel itself (that is,
1676 to not rely on the boot loader to provide them.)
1677
1678 To compile command line arguments into the kernel,
1679 set this option to 'Y', then fill in the
1680 the boot arguments in CONFIG_CMDLINE.
1681
1682 Systems with fully functional boot loaders (i.e. non-embedded)
1683 should leave this option set to 'N'.
1684
1685config CMDLINE
1686 string "Built-in kernel command string"
1687 depends on CMDLINE_BOOL
1688 default ""
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001689 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001690 Enter arguments here that should be compiled into the kernel
1691 image and used at boot time. If the boot loader provides a
1692 command line at boot time, it is appended to this string to
1693 form the full kernel command line, when the system boots.
1694
1695 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1696 change this behavior.
1697
1698 In most cases, the command line (whether built-in or provided
1699 by the boot loader) should specify the device for the root
1700 file system.
1701
1702config CMDLINE_OVERRIDE
1703 bool "Built-in command line overrides boot loader arguments"
Tim Bird516cbf32008-08-12 12:52:36 -07001704 depends on CMDLINE_BOOL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001705 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001706 Set this option to 'Y' to have the kernel ignore the boot loader
1707 command line, and use ONLY the built-in command line.
1708
1709 This is used to work around broken boot loaders. This should
1710 be set to 'N' under normal conditions.
1711
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001712endmenu
1713
1714config ARCH_ENABLE_MEMORY_HOTPLUG
1715 def_bool y
1716 depends on X86_64 || (X86_32 && HIGHMEM)
1717
Gary Hade35551052008-10-31 10:52:03 -07001718config ARCH_ENABLE_MEMORY_HOTREMOVE
1719 def_bool y
1720 depends on MEMORY_HOTPLUG
1721
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001722config USE_PERCPU_NUMA_NODE_ID
Tejun Heo645a7912011-01-23 14:37:40 +01001723 def_bool y
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001724 depends on NUMA
1725
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001726menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001727
1728config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001729 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001730 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001731
1732source "kernel/power/Kconfig"
1733
1734source "drivers/acpi/Kconfig"
1735
Feng Tangefafc8b2009-08-14 15:23:29 -04001736source "drivers/sfi/Kconfig"
1737
Andi Kleena6b68072008-01-30 13:32:49 +01001738config X86_APM_BOOT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001739 def_bool y
Andi Kleena6b68072008-01-30 13:32:49 +01001740 depends on APM || APM_MODULE
1741
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001742menuconfig APM
1743 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001744 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001745 ---help---
1746 APM is a BIOS specification for saving power using several different
1747 techniques. This is mostly useful for battery powered laptops with
1748 APM compliant BIOSes. If you say Y here, the system time will be
1749 reset after a RESUME operation, the /proc/apm device will provide
1750 battery status information, and user-space programs will receive
1751 notification of APM "events" (e.g. battery status change).
1752
1753 If you select "Y" here, you can disable actual use of the APM
1754 BIOS by passing the "apm=off" option to the kernel at boot time.
1755
1756 Note that the APM support is almost completely disabled for
1757 machines with more than one CPU.
1758
1759 In order to use APM, you will need supporting software. For location
Michael Witten2dc98fd2011-07-08 21:11:16 +00001760 and more information, read <file:Documentation/power/apm-acpi.txt>
1761 and the Battery Powered Linux mini-HOWTO, available from
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001762 <http://www.tldp.org/docs.html#howto>.
1763
1764 This driver does not spin down disk drives (see the hdparm(8)
1765 manpage ("man 8 hdparm") for that), and it doesn't turn off
1766 VESA-compliant "green" monitors.
1767
1768 This driver does not support the TI 4000M TravelMate and the ACER
1769 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1770 desktop machines also don't have compliant BIOSes, and this driver
1771 may cause those machines to panic during the boot phase.
1772
1773 Generally, if you don't have a battery in your machine, there isn't
1774 much point in using this driver and you should say N. If you get
1775 random kernel OOPSes or reboots that don't seem to be related to
1776 anything, try disabling/enabling this option (or disabling/enabling
1777 APM in your BIOS).
1778
1779 Some other things you should try when experiencing seemingly random,
1780 "weird" problems:
1781
1782 1) make sure that you have enough swap space and that it is
1783 enabled.
1784 2) pass the "no-hlt" option to the kernel
1785 3) switch on floating point emulation in the kernel and pass
1786 the "no387" option to the kernel
1787 4) pass the "floppy=nodma" option to the kernel
1788 5) pass the "mem=4M" option to the kernel (thereby disabling
1789 all but the first 4 MB of RAM)
1790 6) make sure that the CPU is not over clocked.
1791 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1792 8) disable the cache from your BIOS settings
1793 9) install a fan for the video card or exchange video RAM
1794 10) install a better fan for the CPU
1795 11) exchange RAM chips
1796 12) exchange the motherboard.
1797
1798 To compile this driver as a module, choose M here: the
1799 module will be called apm.
1800
1801if APM
1802
1803config APM_IGNORE_USER_SUSPEND
1804 bool "Ignore USER SUSPEND"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001805 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001806 This option will ignore USER SUSPEND requests. On machines with a
1807 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1808 series notebooks, it is necessary to say Y because of a BIOS bug.
1809
1810config APM_DO_ENABLE
1811 bool "Enable PM at boot time"
1812 ---help---
1813 Enable APM features at boot time. From page 36 of the APM BIOS
1814 specification: "When disabled, the APM BIOS does not automatically
1815 power manage devices, enter the Standby State, enter the Suspend
1816 State, or take power saving steps in response to CPU Idle calls."
1817 This driver will make CPU Idle calls when Linux is idle (unless this
1818 feature is turned off -- see "Do CPU IDLE calls", below). This
1819 should always save battery power, but more complicated APM features
1820 will be dependent on your BIOS implementation. You may need to turn
1821 this option off if your computer hangs at boot time when using APM
1822 support, or if it beeps continuously instead of suspending. Turn
1823 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1824 T400CDT. This is off by default since most machines do fine without
1825 this feature.
1826
1827config APM_CPU_IDLE
1828 bool "Make CPU Idle calls when idle"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001829 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001830 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1831 On some machines, this can activate improved power savings, such as
1832 a slowed CPU clock rate, when the machine is idle. These idle calls
1833 are made after the idle loop has run for some length of time (e.g.,
1834 333 mS). On some machines, this will cause a hang at boot time or
1835 whenever the CPU becomes idle. (On machines with more than one CPU,
1836 this option does nothing.)
1837
1838config APM_DISPLAY_BLANK
1839 bool "Enable console blanking using APM"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001840 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001841 Enable console blanking using the APM. Some laptops can use this to
1842 turn off the LCD backlight when the screen blanker of the Linux
1843 virtual console blanks the screen. Note that this is only used by
1844 the virtual console screen blanker, and won't turn off the backlight
1845 when using the X Window system. This also doesn't have anything to
1846 do with your VESA-compliant power-saving monitor. Further, this
1847 option doesn't work for all laptops -- it might not turn off your
1848 backlight at all, or it might print a lot of errors to the console,
1849 especially if you are using gpm.
1850
1851config APM_ALLOW_INTS
1852 bool "Allow interrupts during APM BIOS calls"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001853 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001854 Normally we disable external interrupts while we are making calls to
1855 the APM BIOS as a measure to lessen the effects of a badly behaving
1856 BIOS implementation. The BIOS should reenable interrupts if it
1857 needs to. Unfortunately, some BIOSes do not -- especially those in
1858 many of the newer IBM Thinkpads. If you experience hangs when you
1859 suspend, try setting this to Y. Otherwise, say N.
1860
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001861endif # APM
1862
Dave Jonesbb0a56e2011-05-19 18:51:07 -04001863source "drivers/cpufreq/Kconfig"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001864
1865source "drivers/cpuidle/Kconfig"
1866
Andy Henroid27471fd2008-10-09 11:45:22 -07001867source "drivers/idle/Kconfig"
1868
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001869endmenu
1870
1871
1872menu "Bus options (PCI etc.)"
1873
1874config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001875 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001876 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001877 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001878 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001879 Find out whether you have a PCI motherboard. PCI is the name of a
1880 bus system, i.e. the way the CPU talks to the other stuff inside
1881 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1882 VESA. If you have PCI, say Y, otherwise N.
1883
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001884choice
1885 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001886 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001887 default PCI_GOANY
1888 ---help---
1889 On PCI systems, the BIOS can be used to detect the PCI devices and
1890 determine their configuration. However, some old PCI motherboards
1891 have BIOS bugs and may crash if this is done. Also, some embedded
1892 PCI-based systems don't have any BIOS at all. Linux can also try to
1893 detect the PCI hardware directly without using the BIOS.
1894
1895 With this option, you can specify how Linux should detect the
1896 PCI devices. If you choose "BIOS", the BIOS will be used,
1897 if you choose "Direct", the BIOS won't be used, and if you
1898 choose "MMConfig", then PCI Express MMCONFIG will be used.
1899 If you choose "Any", the kernel will try MMCONFIG, then the
1900 direct access method and falls back to the BIOS if that doesn't
1901 work. If unsure, go with the default, which is "Any".
1902
1903config PCI_GOBIOS
1904 bool "BIOS"
1905
1906config PCI_GOMMCONFIG
1907 bool "MMConfig"
1908
1909config PCI_GODIRECT
1910 bool "Direct"
1911
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001912config PCI_GOOLPC
Daniel Drake76fb6572010-09-23 17:28:04 +01001913 bool "OLPC XO-1"
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001914 depends on OLPC
1915
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001916config PCI_GOANY
1917 bool "Any"
1918
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001919endchoice
1920
1921config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001922 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001923 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001924
1925# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1926config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001927 def_bool y
Shaohua Li0aba4962011-05-27 14:59:39 +08001928 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001929
1930config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001931 def_bool y
Feng Tang5f0db7a2009-08-14 15:37:50 -04001932 depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001933
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001934config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001935 def_bool y
1936 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001937
Alex Nixonb5401a92010-03-18 16:31:34 -04001938config PCI_XEN
1939 def_bool y
1940 depends on PCI && XEN
1941 select SWIOTLB_XEN
1942
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001943config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001944 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001945 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001946
1947config PCI_MMCONFIG
1948 bool "Support mmconfig PCI config space access"
1949 depends on X86_64 && PCI && ACPI
1950
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001951config PCI_CNB20LE_QUIRK
David Rientjes6a108a12011-01-20 14:44:16 -08001952 bool "Read CNB20LE Host Bridge Windows" if EXPERT
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001953 default n
1954 depends on PCI && EXPERIMENTAL
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001955 help
1956 Read the PCI windows out of the CNB20LE host bridge. This allows
1957 PCI hotplug to work on systems with the CNB20LE chipset which do
1958 not have ACPI.
1959
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001960 There's no public spec for this chipset, and this functionality
1961 is known to be incomplete.
1962
1963 You should say N unless you know you need this.
1964
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001965source "drivers/pci/pcie/Kconfig"
1966
1967source "drivers/pci/Kconfig"
1968
David Rientjes1c00f012011-03-22 16:34:59 -07001969# x86_64 have no ISA slots, but can have ISA-style DMA.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001970config ISA_DMA_API
David Rientjes1c00f012011-03-22 16:34:59 -07001971 bool "ISA-style DMA support" if (X86_64 && EXPERT)
1972 default y
1973 help
1974 Enables ISA-style DMA support for devices requiring such controllers.
1975 If unsure, say Y.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001976
1977if X86_32
1978
1979config ISA
1980 bool "ISA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001981 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001982 Find out whether you have ISA slots on your motherboard. ISA is the
1983 name of a bus system, i.e. the way the CPU talks to the other stuff
1984 inside your box. Other bus systems are PCI, EISA, MicroChannel
1985 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1986 newer boards don't support it. If you have ISA, say Y, otherwise N.
1987
1988config EISA
1989 bool "EISA support"
1990 depends on ISA
1991 ---help---
1992 The Extended Industry Standard Architecture (EISA) bus was
1993 developed as an open alternative to the IBM MicroChannel bus.
1994
1995 The EISA bus provided some of the features of the IBM MicroChannel
1996 bus while maintaining backward compatibility with cards made for
1997 the older ISA bus. The EISA bus saw limited use between 1988 and
1998 1995 when it was made obsolete by the PCI bus.
1999
2000 Say Y here if you are building a kernel for an EISA-based machine.
2001
2002 Otherwise, say N.
2003
2004source "drivers/eisa/Kconfig"
2005
2006config MCA
Ingo Molnar72ee6eb2009-01-27 16:57:49 +01002007 bool "MCA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002008 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002009 MicroChannel Architecture is found in some IBM PS/2 machines and
2010 laptops. It is a bus system similar to PCI or ISA. See
2011 <file:Documentation/mca.txt> (and especially the web page given
2012 there) before attempting to build an MCA bus kernel.
2013
2014source "drivers/mca/Kconfig"
2015
2016config SCx200
2017 tristate "NatSemi SCx200 support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002018 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002019 This provides basic support for National Semiconductor's
2020 (now AMD's) Geode processors. The driver probes for the
2021 PCI-IDs of several on-chip devices, so its a good dependency
2022 for other scx200_* drivers.
2023
2024 If compiled as a module, the driver is named scx200.
2025
2026config SCx200HR_TIMER
2027 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
John Stultz592913e2010-07-13 17:56:20 -07002028 depends on SCx200
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002029 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002030 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002031 This driver provides a clocksource built upon the on-chip
2032 27MHz high-resolution timer. Its also a workaround for
2033 NSC Geode SC-1100's buggy TSC, which loses time when the
2034 processor goes idle (as is done by the scheduler). The
2035 other workaround is idle=poll boot option.
2036
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002037config OLPC
2038 bool "One Laptop Per Child support"
Thomas Gleixner54008972011-02-23 09:50:15 +01002039 depends on !X86_PAE
Andres Salomon3c554942009-12-14 18:00:36 -08002040 select GPIOLIB
Thomas Gleixnerdc3119e72011-02-23 10:08:31 +01002041 select OF
Daniel Drake45bb1672011-03-13 15:10:17 +00002042 select OF_PROMTREE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002043 ---help---
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002044 Add support for detecting the unique features of the OLPC
2045 XO hardware.
2046
Daniel Drakea3128582011-06-25 17:34:10 +01002047config OLPC_XO1_PM
2048 bool "OLPC XO-1 Power Management"
Daniel Drake97c4cb72011-06-25 17:34:11 +01002049 depends on OLPC && MFD_CS5535 && PM_SLEEP
Daniel Drakea3128582011-06-25 17:34:10 +01002050 select MFD_CORE
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002051 ---help---
Daniel Drake97c4cb72011-06-25 17:34:11 +01002052 Add support for poweroff and suspend of the OLPC XO-1 laptop.
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002053
Daniel Drakecfee9592011-06-25 17:34:17 +01002054config OLPC_XO1_RTC
2055 bool "OLPC XO-1 Real Time Clock"
2056 depends on OLPC_XO1_PM && RTC_DRV_CMOS
2057 ---help---
2058 Add support for the XO-1 real time clock, which can be used as a
2059 programmable wakeup source.
2060
Daniel Drake7feda8e2011-06-25 17:34:12 +01002061config OLPC_XO1_SCI
2062 bool "OLPC XO-1 SCI extras"
Daniel Draked8d01a62011-07-24 18:33:21 +01002063 depends on OLPC && OLPC_XO1_PM
2064 select POWER_SUPPLY
Daniel Drake7feda8e2011-06-25 17:34:12 +01002065 select GPIO_CS5535
2066 select MFD_CORE
2067 ---help---
2068 Add support for SCI-based features of the OLPC XO-1 laptop:
Daniel Drake7bc74b32011-06-25 17:34:14 +01002069 - EC-driven system wakeups
Daniel Drake7feda8e2011-06-25 17:34:12 +01002070 - Power button
Daniel Drake7bc74b32011-06-25 17:34:14 +01002071 - Ebook switch
Daniel Drake2cf2bae2011-06-25 17:34:15 +01002072 - Lid switch
Daniel Drakee1040ac2011-06-25 17:34:16 +01002073 - AC adapter status updates
2074 - Battery status updates
Daniel Drake7feda8e2011-06-25 17:34:12 +01002075
Daniel Drakea0f30f52011-06-25 17:34:18 +01002076config OLPC_XO15_SCI
2077 bool "OLPC XO-1.5 SCI extras"
Daniel Draked8d01a62011-07-24 18:33:21 +01002078 depends on OLPC && ACPI
2079 select POWER_SUPPLY
Daniel Drakea0f30f52011-06-25 17:34:18 +01002080 ---help---
2081 Add support for SCI-based features of the OLPC XO-1.5 laptop:
2082 - EC-driven system wakeups
2083 - AC adapter status updates
2084 - Battery status updates
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002085
Ed Wildgoosed4f3e352011-09-20 14:00:12 -07002086config ALIX
2087 bool "PCEngines ALIX System Support (LED setup)"
2088 select GPIOLIB
2089 ---help---
2090 This option enables system support for the PCEngines ALIX.
2091 At present this just sets up LEDs for GPIO control on
2092 ALIX2/3/6 boards. However, other system specific setup should
2093 get added here.
2094
2095 Note: You must still enable the drivers for GPIO and LED support
2096 (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs
2097
2098 Note: You have to set alix.force=1 for boards with Award BIOS.
2099
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002100endif # X86_32
2101
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +02002102config AMD_NB
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002103 def_bool y
Borislav Petkov0e152cd2010-03-12 15:43:03 +01002104 depends on CPU_SUP_AMD && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002105
2106source "drivers/pcmcia/Kconfig"
2107
2108source "drivers/pci/hotplug/Kconfig"
2109
Alexandre Bounine388b78a2011-03-23 16:43:03 -07002110config RAPIDIO
2111 bool "RapidIO support"
2112 depends on PCI
2113 default n
2114 help
2115 If you say Y here, the kernel will include drivers and
2116 infrastructure code to support RapidIO interconnect devices.
2117
2118source "drivers/rapidio/Kconfig"
2119
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002120endmenu
2121
2122
2123menu "Executable file formats / Emulations"
2124
2125source "fs/Kconfig.binfmt"
2126
2127config IA32_EMULATION
2128 bool "IA32 Emulation"
2129 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01002130 select COMPAT_BINFMT_ELF
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002131 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002132 Include code to run 32-bit programs under a 64-bit kernel. You should
2133 likely turn this on, unless you're 100% sure that you don't have any
2134 32-bit programs left.
2135
2136config IA32_AOUT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002137 tristate "IA32 a.out support"
2138 depends on IA32_EMULATION
2139 ---help---
2140 Support old a.out binaries in the 32bit emulation.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002141
2142config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002143 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002144 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002145
2146config COMPAT_FOR_U64_ALIGNMENT
2147 def_bool COMPAT
2148 depends on X86_64
2149
2150config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002151 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04002152 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002153
David Howellsee009e4a02011-03-07 15:06:20 +00002154config KEYS_COMPAT
2155 bool
2156 depends on COMPAT && KEYS
2157 default y
2158
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002159endmenu
2160
2161
Keith Packarde5beae12008-11-03 18:21:45 +01002162config HAVE_ATOMIC_IOMAP
2163 def_bool y
2164 depends on X86_32
2165
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +09002166config HAVE_TEXT_POKE_SMP
2167 bool
2168 select STOP_MACHINE if SMP
2169
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002170source "net/Kconfig"
2171
2172source "drivers/Kconfig"
2173
2174source "drivers/firmware/Kconfig"
2175
2176source "fs/Kconfig"
2177
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002178source "arch/x86/Kconfig.debug"
2179
2180source "security/Kconfig"
2181
2182source "crypto/Kconfig"
2183
Avi Kivityedf88412007-12-16 11:02:48 +02002184source "arch/x86/kvm/Kconfig"
2185
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002186source "lib/Kconfig"