blob: 8ec3a1aa4abd3f612df4a5da31f30c67554d5182 [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
Alessandro Rubini4692d772012-04-04 19:39:58 +020015 select X86_DEV_DMA_OPS
Sam Ravnborg1032c0b2007-11-06 21:35:08 +010016
17### Arch settings
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010018config X86
Harvey Harrison3c2362e2008-01-30 13:31:03 +010019 def_bool y
David Woodhousee17c6d52008-06-17 12:19:34 +010020 select HAVE_AOUT if X86_32
Ingo Molnara5574cf2008-05-05 23:19:50 +020021 select HAVE_UNSTABLE_SCHED_CLOCK
Sam Ravnborgec7748b2008-02-09 10:46:40 +010022 select HAVE_IDE
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -050023 select HAVE_OPROFILE
Ralf Baechle8761f1a2011-06-01 19:05:09 +010024 select HAVE_PCSPKR_PLATFORM
Peter Zijlstracc2067a2010-11-16 21:49:01 +010025 select HAVE_PERF_EVENTS
Peter Zijlstrae360adb2010-10-14 14:01:34 +080026 select HAVE_IRQ_WORK
Rik van Riel28b2ee22008-07-23 21:27:05 -070027 select HAVE_IOREMAP_PROT
Mathieu Desnoyers3f550092008-02-02 15:10:35 -050028 select HAVE_KPROBES
Yinghai Lu72d7c3b2010-08-25 13:39:17 -070029 select HAVE_MEMBLOCK
Tejun Heo0608f702011-07-14 11:44:23 +020030 select HAVE_MEMBLOCK_NODE_MAP
Tejun Heoc378ddd2011-07-14 11:46:03 +020031 select ARCH_DISCARD_MEMBLOCK
Ingo Molnar1f972762008-07-26 13:52:50 +020032 select ARCH_WANT_OPTIONAL_GPIOLIB
Ingo Molnarda4276b2009-01-07 11:05:10 +010033 select ARCH_WANT_FRAME_POINTERS
FUJITA Tomonori7c095e42009-06-17 16:28:12 -070034 select HAVE_DMA_ATTRS
Marek Szyprowski0a2b9a62011-12-29 13:09:51 +010035 select HAVE_DMA_CONTIGUOUS if !SWIOTLB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080036 select HAVE_KRETPROBES
Masami Hiramatsuc0f7ac32010-02-25 08:34:46 -050037 select HAVE_OPTPROBES
Steven Rostedte4b2b882008-08-14 15:45:11 -040038 select HAVE_FTRACE_MCOUNT_RECORD
Steven Rostedtcf4db252010-10-14 23:32:44 -040039 select HAVE_C_RECORDMCOUNT
Steven Rostedt677aa9f2008-05-17 00:01:36 -040040 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -040041 select HAVE_FUNCTION_TRACER
Frederic Weisbecker48d68b22008-12-02 00:20:39 +010042 select HAVE_FUNCTION_GRAPH_TRACER
Steven Rostedt71e308a2009-06-18 12:45:08 -040043 select HAVE_FUNCTION_GRAPH_FP_TEST
Steven Rostedt60a7ecf2008-11-05 16:05:44 -050044 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
Josh Stone66700002009-08-24 14:43:11 -070045 select HAVE_SYSCALL_TRACEPOINTS
Ingo Molnare0ec9482009-01-27 17:01:14 +010046 select HAVE_KVM
Ingo Molnar49793b02009-01-27 17:02:29 +010047 select HAVE_ARCH_KGDB
Roland McGrath99bbc4b2008-04-20 14:35:12 -070048 select HAVE_ARCH_TRACEHOOK
Dmitry Baryshkov323ec002008-06-29 14:19:31 +040049 select HAVE_GENERIC_DMA_COHERENT if X86_32
Johannes Berg58340a02008-07-25 01:45:33 -070050 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Török Edwin8d264872008-11-23 12:39:08 +020051 select USER_STACKTRACE_SUPPORT
Heiko Carstensf850c30c2010-02-10 17:25:17 +010052 select HAVE_REGS_AND_STACK_ACCESS_API
Joerg Roedel2118d0c2009-01-09 15:13:15 +010053 select HAVE_DMA_API_DEBUG
H. Peter Anvin2e9f3bd2009-01-04 15:41:25 -080054 select HAVE_KERNEL_GZIP
55 select HAVE_KERNEL_BZIP2
56 select HAVE_KERNEL_LZMA
Lasse Collin30314802011-01-12 17:01:24 -080057 select HAVE_KERNEL_XZ
Albin Tonnerre13510992010-01-08 14:42:45 -080058 select HAVE_KERNEL_LZO
K.Prasad0067f122009-06-01 23:43:57 +053059 select HAVE_HW_BREAKPOINT
Frederic Weisbecker01027522010-04-11 18:55:56 +020060 select HAVE_MIXED_BREAKPOINTS_REGS
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010061 select PERF_EVENTS
Frederic Weisbeckerc01d4322010-05-15 22:57:48 +020062 select HAVE_PERF_EVENTS_NMI
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010063 select ANON_INODES
Heiko Carstens43570fd2012-01-12 17:17:27 -080064 select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
Heiko Carstens41561532012-01-12 17:17:30 -080065 select HAVE_CMPXCHG_LOCAL if !M386
Heiko Carstens25654092012-01-12 17:17:33 -080066 select HAVE_CMPXCHG_DOUBLE
Pekka Enberg0a4af3b2009-02-26 21:38:56 +020067 select HAVE_ARCH_KMEMCHECK
Avi Kivity7c68af62009-09-19 09:40:22 +030068 select HAVE_USER_RETURN_NOTIFIER
David Daneye39f5602012-01-10 15:10:21 -080069 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
Steven Rostedt46eb3b62010-09-22 23:10:23 -040070 select HAVE_ARCH_JUMP_LABEL
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +090071 select HAVE_TEXT_POKE_SMP
Thomas Gleixner3bb98082010-09-27 12:46:02 +000072 select HAVE_GENERIC_HARDIRQS
Catalin Marinas74634492012-07-30 14:41:09 -070073 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Yinghai Lu141d55e2011-10-12 11:53:17 -070074 select SPARSE_IRQ
Jan Beulichc49aa5b2011-03-08 09:24:26 +000075 select GENERIC_FIND_FIRST_BIT
Thomas Gleixner3bb98082010-09-27 12:46:02 +000076 select GENERIC_IRQ_PROBE
77 select GENERIC_PENDING_IRQ if SMP
Thomas Gleixner517e4982010-12-16 17:59:57 +010078 select GENERIC_IRQ_SHOW
Martin Schwidefskyd1748302011-08-23 15:29:42 +020079 select GENERIC_CLOCKEVENTS_MIN_ADJUST
Thomas Gleixnerc01858082011-02-07 02:24:08 +010080 select IRQ_FORCED_THREADING
Amerigo Wang351f8f82011-01-12 16:59:39 -080081 select USE_GENERIC_SMP_HELPERS if SMP
Sam Ravnborge47b65b2012-05-21 20:45:37 +020082 select HAVE_BPF_JIT if X86_64
Thomas Gleixner0a779c52011-06-09 13:08:26 +000083 select CLKEVT_I8253
Huang Yingdf013ff2011-07-13 13:14:22 +080084 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Michael S. Tsirkin4673ca82011-11-24 14:54:28 +020085 select GENERIC_IOMAP
Linus Torvaldse419b4c2012-05-03 10:16:43 -070086 select DCACHE_WORD_ACCESS
Thomas Gleixner7eb43a62012-04-20 13:05:48 +000087 select GENERIC_SMP_IDLE_THREAD
Will Deaconc1d7e012012-07-30 14:42:46 -070088 select ARCH_WANT_IPC_PARSE_VERSION if X86_32
Will Drewryc6cfbeb2012-04-12 16:48:03 -050089 select HAVE_ARCH_SECCOMP_FILTER
David Daney8b5ad472012-04-24 11:23:15 -070090 select BUILDTIME_EXTABLE_SORT
Thomas Gleixnerbdebaf82012-05-18 16:45:44 +000091 select GENERIC_CMOS_UPDATE
92 select CLOCKSOURCE_WATCHDOG
93 select GENERIC_CLOCKEVENTS
94 select ARCH_CLOCKSOURCE_DATA if X86_64
95 select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC)
96 select GENERIC_TIME_VSYSCALL if X86_64
97 select KTIME_SCALAR if X86_32
Linus Torvalds4ae73f22012-05-26 10:14:39 -070098 select GENERIC_STRNCPY_FROM_USER
Linus Torvalds5723aa92012-05-26 11:09:53 -070099 select GENERIC_STRNLEN_USER
Balbir Singh7d8330a2008-02-10 12:46:28 +0530100
Ingo Molnarba7e4d12009-06-06 13:58:12 +0200101config INSTRUCTION_DECODER
Srikar Dronamraju2b144492012-02-09 14:56:42 +0530102 def_bool (KPROBES || PERF_EVENTS || UPROBES)
Ingo Molnarba7e4d12009-06-06 13:58:12 +0200103
Linus Torvalds51b26ad2009-04-26 10:12:47 -0700104config OUTPUT_FORMAT
105 string
106 default "elf32-i386" if X86_32
107 default "elf64-x86-64" if X86_64
108
Sam Ravnborg73531902008-05-25 23:03:18 +0200109config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +0200110 string
Sam Ravnborg73531902008-05-25 23:03:18 +0200111 default "arch/x86/configs/i386_defconfig" if X86_32
112 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +0200113
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100114config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100115 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100116
117config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100118 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100119
Heiko Carstensaa7d9352008-02-01 17:45:14 +0100120config HAVE_LATENCYTOP_SUPPORT
121 def_bool y
122
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100123config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100124 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100125
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100126config SBUS
127 bool
128
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800129config NEED_DMA_MAP_STATE
Suresh Siddhad3f13812011-08-23 17:05:25 -0700130 def_bool (X86_64 || INTEL_IOMMU || DMA_API_DEBUG)
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800131
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700132config NEED_SG_DMA_LENGTH
Andrew Morton4a14d842010-05-26 14:44:33 -0700133 def_bool y
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700134
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100135config GENERIC_ISA_DMA
David Rientjes1c00f012011-03-22 16:34:59 -0700136 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100137
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100138config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100139 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100140 depends on BUG
Jan Beulichb93a5312008-12-16 11:40:27 +0000141 select GENERIC_BUG_RELATIVE_POINTERS if X86_64
142
143config GENERIC_BUG_RELATIVE_POINTERS
144 bool
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100145
146config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100147 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100148
Florian Fainellia6082952008-01-30 13:33:35 +0100149config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -0700150 bool
Florian Fainellia6082952008-01-30 13:33:35 +0100151
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100152config ARCH_MAY_HAVE_PC_FDC
David Rientjes8df3bd92011-03-22 16:34:58 -0700153 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100154
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100155config RWSEM_GENERIC_SPINLOCK
156 def_bool !X86_XADD
157
158config RWSEM_XCHGADD_ALGORITHM
159 def_bool X86_XADD
160
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100161config GENERIC_CALIBRATE_DELAY
162 def_bool y
163
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800164config ARCH_HAS_CPU_RELAX
165 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100166
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400167config ARCH_HAS_DEFAULT_IDLE
168 def_bool y
169
Pekka Enberg1b27d052008-04-28 02:12:22 -0700170config ARCH_HAS_CACHE_LINE_SIZE
171 def_bool y
172
Thomas Renningerfad12ac2012-01-26 00:09:14 +0100173config ARCH_HAS_CPU_AUTOPROBE
174 def_bool y
175
Mike Travisdd5af902008-01-30 13:33:32 +0100176config HAVE_SETUP_PER_CPU_AREA
Brian Gerst89c9c4c2009-01-27 12:56:48 +0900177 def_bool y
travis@sgi.comb32ef632008-01-30 13:32:51 +0100178
Tejun Heo08fc4582009-08-14 15:00:49 +0900179config NEED_PER_CPU_EMBED_FIRST_CHUNK
180 def_bool y
181
182config NEED_PER_CPU_PAGE_FIRST_CHUNK
Tejun Heo11124412009-02-20 16:29:09 +0900183 def_bool y
184
Johannes Berg801e4062007-12-08 02:12:39 +0100185config ARCH_HIBERNATION_POSSIBLE
186 def_bool y
Johannes Berg801e4062007-12-08 02:12:39 +0100187
Johannes Bergf4cb5702007-12-08 02:14:00 +0100188config ARCH_SUSPEND_POSSIBLE
189 def_bool y
Johannes Bergf4cb5702007-12-08 02:14:00 +0100190
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100191config ZONE_DMA32
192 bool
193 default X86_64
194
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100195config AUDIT_ARCH
196 bool
197 default X86_64
198
Ingo Molnar765c68b2008-04-09 11:03:37 +0200199config ARCH_SUPPORTS_OPTIMIZED_INLINING
200 def_bool y
201
Akinobu Mita6a11f752009-03-31 15:23:17 -0700202config ARCH_SUPPORTS_DEBUG_PAGEALLOC
203 def_bool y
204
Shane Wang69575d32009-09-01 18:25:07 -0700205config HAVE_INTEL_TXT
206 def_bool y
Suresh Siddhad3f13812011-08-23 17:05:25 -0700207 depends on EXPERIMENTAL && INTEL_IOMMU && ACPI
Shane Wang69575d32009-09-01 18:25:07 -0700208
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100209config X86_32_SMP
210 def_bool y
211 depends on X86_32 && SMP
212
213config X86_64_SMP
214 def_bool y
215 depends on X86_64 && SMP
216
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100217config X86_HT
Jan Beulich6fc108a2010-04-21 15:23:44 +0100218 def_bool y
Adrian Bunkee0011a2007-12-04 17:19:07 +0100219 depends on SMP
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100220
Tejun Heoccbeed32009-02-09 22:17:40 +0900221config X86_32_LAZY_GS
222 def_bool y
Tejun Heo60a53172009-02-09 22:17:40 +0900223 depends on X86_32 && !CC_STACKPROTECTOR
Tejun Heoccbeed32009-02-09 22:17:40 +0900224
Borislav Petkovd61931d2010-03-05 17:34:46 +0100225config ARCH_HWEIGHT_CFLAGS
226 string
227 default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
228 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
229
Borislav Petkovd7c53c92010-08-19 20:10:29 +0200230config ARCH_CPU_PROBE_RELEASE
231 def_bool y
232 depends on HOTPLUG_CPU
233
Srikar Dronamraju2b144492012-02-09 14:56:42 +0530234config ARCH_SUPPORTS_UPROBES
235 def_bool y
236
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100237source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700238source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100239
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100240menu "Processor type and features"
241
Randy Dunlap5ee71532012-01-16 11:57:18 -0800242config ZONE_DMA
243 bool "DMA memory allocation support" if EXPERT
244 default y
245 help
246 DMA memory allocation support allows devices with less than 32-bit
247 addressing to allocate within the first 16MB of address space.
248 Disable if no such devices will be used.
249
250 If unsure, say Y.
251
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100252config SMP
253 bool "Symmetric multi-processing support"
254 ---help---
255 This enables support for systems with more than one CPU. If you have
256 a system with only one CPU, like most personal computers, say N. If
257 you have a system with more than one CPU, say Y.
258
259 If you say N here, the kernel will run on single and multiprocessor
260 machines, but will use only one CPU of a multiprocessor machine. If
261 you say Y here, the kernel will run on many, but not all,
262 singleprocessor machines. On a singleprocessor machine, the kernel
263 will run faster if you say N here.
264
265 Note that if you say Y here and choose architecture "586" or
266 "Pentium" under "Processor family", the kernel will not work on 486
267 architectures. Similarly, multiprocessor kernels for the "PPro"
268 architecture may not work on all Pentium based boards.
269
270 People using multiprocessor machines who say Y here should also say
271 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
272 Management" code will be disabled if you say Y here.
273
Paul Bolle395cf962011-08-15 02:02:26 +0200274 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100275 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
276 <http://www.tldp.org/docs.html#howto>.
277
278 If you don't know what to do here, say N.
279
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800280config X86_X2APIC
281 bool "Support x2apic"
Suresh Siddhad3f13812011-08-23 17:05:25 -0700282 depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800283 ---help---
284 This enables x2apic support on CPUs that have this feature.
285
286 This allows 32-bit apic IDs (so it can support very large systems),
287 and accesses the local apic via MSRs not via mmio.
288
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800289 If you don't know what to do here, say N.
290
Yinghai Lu6695c852008-06-19 12:13:09 -0700291config X86_MPPARSE
Jan Beulich7a527682008-10-30 10:38:24 +0000292 bool "Enable MPS table" if ACPI
293 default y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200294 depends on X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100295 ---help---
Yinghai Lu6695c852008-06-19 12:13:09 -0700296 For old smp systems that do not have proper acpi support. Newer systems
297 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
Yinghai Lu6695c852008-06-19 12:13:09 -0700298
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800299config X86_BIGSMP
300 bool "Support for big SMP systems with more than 8 CPUs"
301 depends on X86_32 && SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100302 ---help---
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800303 This option is needed for the systems that have more than 8 CPUs
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100304
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800305if X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800306config X86_EXTENDED_PLATFORM
307 bool "Support for extended (non-PC) x86 platforms"
308 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100309 ---help---
Ingo Molnar06ac8342009-01-27 18:11:43 +0100310 If you disable this option then the kernel will only support
311 standard PC platforms. (which covers the vast majority of
312 systems out there.)
313
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800314 If you enable this option then you'll be able to select support
315 for the following (non-PC) 32 bit x86 platforms:
316 AMD Elan
317 NUMAQ (IBM/Sequent)
318 RDC R-321x SoC
319 SGI 320/540 (Visual Workstation)
Alessandro Rubini83125a32012-04-04 19:40:21 +0200320 STA2X11-based (e.g. Northville)
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800321 Summit/EXA (IBM x440)
322 Unisys ES7000 IA32 series
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200323 Moorestown MID devices
Ingo Molnar06ac8342009-01-27 18:11:43 +0100324
325 If you have one of these systems, or if you want to build a
326 generic distribution kernel, say Y here - otherwise say N.
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800327endif
Ingo Molnar06ac8342009-01-27 18:11:43 +0100328
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800329if X86_64
330config X86_EXTENDED_PLATFORM
331 bool "Support for extended (non-PC) x86 platforms"
332 default y
333 ---help---
334 If you disable this option then the kernel will only support
335 standard PC platforms. (which covers the vast majority of
336 systems out there.)
337
338 If you enable this option then you'll be able to select support
339 for the following (non-PC) 64 bit x86 platforms:
Steffen Persvold44b111b2011-12-06 00:07:26 +0800340 Numascale NumaChip
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800341 ScaleMP vSMP
342 SGI Ultraviolet
343
344 If you have one of these systems, or if you want to build a
345 generic distribution kernel, say Y here - otherwise say N.
346endif
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800347# This is an alphabetically sorted list of 64 bit extended platforms
348# Please maintain the alphabetic order if and when there are additions
Steffen Persvold44b111b2011-12-06 00:07:26 +0800349config X86_NUMACHIP
350 bool "Numascale NumaChip"
351 depends on X86_64
352 depends on X86_EXTENDED_PLATFORM
353 depends on NUMA
354 depends on SMP
355 depends on X86_X2APIC
Steffen Persvold44b111b2011-12-06 00:07:26 +0800356 ---help---
357 Adds support for Numascale NumaChip large-SMP systems. Needed to
358 enable more than ~168 cores.
359 If you don't have one of these, you should say N here.
Nick Piggin03b48632009-01-20 04:36:04 +0100360
Ingo Molnar6a485652009-01-27 18:29:13 +0100361config X86_VSMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800362 bool "ScaleMP vSMP"
Randy Dunlap03f1a172010-10-13 21:00:23 -0700363 select PARAVIRT_GUEST
Ingo Molnar6a485652009-01-27 18:29:13 +0100364 select PARAVIRT
365 depends on X86_64 && PCI
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800366 depends on X86_EXTENDED_PLATFORM
Shai Fultheimead91d42012-04-16 10:39:35 +0300367 depends on SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100368 ---help---
Ingo Molnar6a485652009-01-27 18:29:13 +0100369 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
370 supposed to run on these EM64T-based machines. Only choose this option
371 if you have one of these machines.
372
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800373config X86_UV
374 bool "SGI Ultraviolet"
375 depends on X86_64
376 depends on X86_EXTENDED_PLATFORM
Jack Steiner54c28d22009-04-03 15:39:42 -0500377 depends on NUMA
Suresh Siddha9d6c26e2009-04-20 13:02:31 -0700378 depends on X86_X2APIC
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800379 ---help---
380 This option is needed in order to support SGI Ultraviolet systems.
381 If you don't have one of these, you should say N here.
382
383# Following is an alphabetically sorted list of 32 bit extended platforms
384# Please maintain the alphabetic order if and when there are additions
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100385
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800386config X86_INTEL_CE
387 bool "CE4100 TV platform"
388 depends on PCI
389 depends on PCI_GODIRECT
390 depends on X86_32
391 depends on X86_EXTENDED_PLATFORM
Dirk Brandewie37bc9f52010-11-09 12:08:08 -0800392 select X86_REBOOTFIXUPS
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +0100393 select OF
394 select OF_EARLY_FLATTREE
Grant Likelyb4e51852011-12-16 15:50:17 -0700395 select IRQ_DOMAIN
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800396 ---help---
397 Select for the Intel CE media processor (CE4100) SOC.
398 This option compiles in support for the CE4100 SOC for settop
399 boxes and media devices.
400
Alan Coxdd137522011-12-05 23:14:39 +0000401config X86_WANT_INTEL_MID
Alan Cox43605ef2011-07-12 17:49:29 +0100402 bool "Intel MID platform support"
403 depends on X86_32
404 depends on X86_EXTENDED_PLATFORM
405 ---help---
406 Select to build a kernel capable of supporting Intel MID platform
407 systems which do not have the PCI legacy interfaces (Moorestown,
408 Medfield). If you are building for a PC class system say N here.
409
Alan Coxdd137522011-12-05 23:14:39 +0000410if X86_WANT_INTEL_MID
Alan Cox43605ef2011-07-12 17:49:29 +0100411
Alan Cox4e2b1c42011-12-06 13:28:22 +0000412config X86_INTEL_MID
413 bool
414
Alan Cox1ea7c672011-11-10 13:29:14 +0000415config X86_MDFLD
416 bool "Medfield MID platform"
417 depends on PCI
418 depends on PCI_GOANY
419 depends on X86_IO_APIC
Alan Cox7c9c3a12011-12-29 14:43:16 +0000420 select X86_INTEL_MID
421 select SFI
422 select DW_APB_TIMER
Alan Cox1ea7c672011-11-10 13:29:14 +0000423 select APB_TIMER
424 select I2C
425 select SPI
426 select INTEL_SCU_IPC
427 select X86_PLATFORM_DEVICES
Mika Westerberg15a713d2012-01-26 17:35:05 +0000428 select MFD_INTEL_MSIC
Alan Cox1ea7c672011-11-10 13:29:14 +0000429 ---help---
430 Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin
431 Internet Device(MID) platform.
432 Unlike standard x86 PCs, Medfield does not have many legacy devices
433 nor standard legacy replacement devices/features. e.g. Medfield does
434 not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
435
Alan Cox43605ef2011-07-12 17:49:29 +0100436endif
437
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800438config X86_RDC321X
439 bool "RDC R-321x SoC"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100440 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800441 depends on X86_EXTENDED_PLATFORM
442 select M486
443 select X86_REBOOTFIXUPS
444 ---help---
445 This option is needed for RDC R-321x system-on-chip, also known
446 as R-8610-(G).
447 If you don't have one of these chips, you should say N here.
448
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100449config X86_32_NON_STANDARD
Ingo Molnar9c398012009-01-27 18:24:57 +0100450 bool "Support non-standard 32-bit SMP architectures"
451 depends on X86_32 && SMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800452 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100453 ---help---
Alessandro Rubini83125a32012-04-04 19:40:21 +0200454 This option compiles in the NUMAQ, Summit, bigsmp, ES7000,
455 STA2X11, default subarchitectures. It is intended for a generic
456 binary kernel. If you select them all, kernel will probe it
457 one by one and will fallback to default.
Yinghai Lud49c4282008-06-08 18:31:54 -0700458
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800459# Alphabetically sorted list of Non standard 32 bit platforms
Yinghai Lud49c4282008-06-08 18:31:54 -0700460
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100461config X86_NUMAQ
462 bool "NUMAQ (IBM/Sequent)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100463 depends on X86_32_NON_STANDARD
Pan, Jacob juna92d1522010-02-24 16:59:55 -0800464 depends on PCI
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100465 select NUMA
Ingo Molnar9c398012009-01-27 18:24:57 +0100466 select X86_MPPARSE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100467 ---help---
Yinghai Lud49c4282008-06-08 18:31:54 -0700468 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
469 NUMA multiquad box. This changes the way that processors are
470 bootstrapped, and uses Clustered Logical APIC addressing mode instead
471 of Flat Logical. You will need a new lynxer.elf file to flash your
472 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100473
Linus Torvaldsd949f362009-09-26 09:35:07 -0700474config X86_SUPPORTS_MEMORY_FAILURE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100475 def_bool y
Linus Torvaldsd949f362009-09-26 09:35:07 -0700476 # MCE code calls memory_failure():
477 depends on X86_MCE
478 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
479 depends on !X86_NUMAQ
480 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
481 depends on X86_64 || !SPARSEMEM
482 select ARCH_SUPPORTS_MEMORY_FAILURE
Linus Torvaldsd949f362009-09-26 09:35:07 -0700483
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200484config X86_VISWS
485 bool "SGI 320/540 (Visual Workstation)"
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800486 depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
487 depends on X86_32_NON_STANDARD
488 ---help---
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200489 The SGI Visual Workstation series is an IA32-based workstation
490 based on SGI systems chips with some legacy PC hardware attached.
491
492 Say Y here to create a kernel to run on the SGI 320 or 540.
493
494 A kernel compiled for the Visual Workstation will run on general
495 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
496
Alessandro Rubini83125a32012-04-04 19:40:21 +0200497config STA2X11
498 bool "STA2X11 Companion Chip Support"
499 depends on X86_32_NON_STANDARD && PCI
500 select X86_DEV_DMA_OPS
501 select X86_DMA_REMAP
502 select SWIOTLB
503 select MFD_STA2X11
504 select ARCH_REQUIRE_GPIOLIB
505 default n
506 ---help---
507 This adds support for boards based on the STA2X11 IO-Hub,
508 a.k.a. "ConneXt". The chip is used in place of the standard
509 PC chipset, so all "standard" peripherals are missing. If this
510 option is selected the kernel will still be able to boot on
511 standard PC machines.
512
Ingo Molnar9c398012009-01-27 18:24:57 +0100513config X86_SUMMIT
514 bool "Summit/EXA (IBM x440)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100515 depends on X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100516 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100517 This option is needed for IBM systems that use the Summit/EXA chipset.
518 In particular, it is needed for the x440.
Ingo Molnar1f972762008-07-26 13:52:50 +0200519
Ingo Molnar9c398012009-01-27 18:24:57 +0100520config X86_ES7000
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800521 bool "Unisys ES7000 IA32 series"
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800522 depends on X86_32_NON_STANDARD && X86_BIGSMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100523 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100524 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
525 supposed to run on an IA32-based Unisys ES7000 system.
526
Shérab82148d12010-09-25 06:06:57 +0200527config X86_32_IRIS
528 tristate "Eurobraille/Iris poweroff module"
529 depends on X86_32
530 ---help---
531 The Iris machines from EuroBraille do not have APM or ACPI support
532 to shut themselves down properly. A special I/O sequence is
533 needed to do so, which is what this module does at
534 kernel shutdown.
535
536 This is only for Iris machines from EuroBraille.
537
538 If unused, say N.
539
Ingo Molnarae1e9132008-11-11 09:05:16 +0100540config SCHED_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100541 def_bool y
542 prompt "Single-depth WCHAN output"
Ken Chena87d0912008-11-06 11:10:49 -0800543 depends on X86
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100544 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100545 Calculate simpler /proc/<PID>/wchan values. If this option
546 is disabled then wchan values will recurse back to the
547 caller function. This provides more accurate wchan values,
548 at the expense of slightly more scheduling overhead.
549
550 If in doubt, say "Y".
551
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100552menuconfig PARAVIRT_GUEST
553 bool "Paravirtualized guest support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100554 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100555 Say Y here to get to see options related to running Linux under
556 various hypervisors. This option alone does not add any kernel code.
557
558 If you say N, all options in this submenu will be skipped and disabled.
559
560if PARAVIRT_GUEST
561
Glauber Costa095c0aa2011-07-11 15:28:18 -0400562config PARAVIRT_TIME_ACCOUNTING
563 bool "Paravirtual steal time accounting"
564 select PARAVIRT
565 default n
566 ---help---
567 Select this option to enable fine granularity task steal time
568 accounting. Time spent executing other tasks in parallel with
569 the current vCPU is discounted from the vCPU power. To account for
570 that, there can be a small performance impact.
571
572 If in doubt, say N here.
573
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100574source "arch/x86/xen/Kconfig"
575
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200576config KVM_CLOCK
577 bool "KVM paravirtualized clock"
578 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200579 select PARAVIRT_CLOCK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100580 ---help---
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200581 Turning on this option will allow you to run a paravirtualized clock
582 when running over the KVM hypervisor. Instead of relying on a PIT
583 (or probably other) emulation by the underlying device model, the host
584 provides the guest with timing infrastructure such as time of day, and
585 system time
586
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500587config KVM_GUEST
588 bool "KVM Guest support"
589 select PARAVIRT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100590 ---help---
591 This option enables various optimizations for running under the KVM
592 hypervisor.
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500593
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100594source "arch/x86/lguest/Kconfig"
595
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100596config PARAVIRT
597 bool "Enable paravirtualization code"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100598 ---help---
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100599 This changes the kernel so it can modify itself when it is run
600 under a hypervisor, potentially improving performance significantly
601 over full virtualization. However, when run without a hypervisor
602 the kernel is theoretically slower and slightly larger.
603
Jeremy Fitzhardingeb4ecc122009-05-13 17:16:55 -0700604config PARAVIRT_SPINLOCKS
605 bool "Paravirtualization layer for spinlocks"
606 depends on PARAVIRT && SMP && EXPERIMENTAL
607 ---help---
608 Paravirtualized spinlocks allow a pvops backend to replace the
609 spinlock implementation with something virtualization-friendly
610 (for example, block the virtual CPU rather than spinning).
611
612 Unfortunately the downside is an up to 5% performance hit on
613 native kernels, with various workloads.
614
615 If you are unsure how to answer this question, answer N.
616
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200617config PARAVIRT_CLOCK
618 bool
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200619
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100620endif
621
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400622config PARAVIRT_DEBUG
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100623 bool "paravirt-ops debugging"
624 depends on PARAVIRT && DEBUG_KERNEL
625 ---help---
626 Enable to debug paravirt_ops internals. Specifically, BUG if
627 a paravirt_op is missing when it is called.
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400628
Yinghai Lu08677212010-02-10 01:20:20 -0800629config NO_BOOTMEM
Yinghai Lu774ea0b2010-08-25 13:39:18 -0700630 def_bool y
Yinghai Lu08677212010-02-10 01:20:20 -0800631
Yinghai Lu03273182008-04-18 17:49:15 -0700632config MEMTEST
633 bool "Memtest"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100634 ---help---
Yinghai Luc64df702008-03-21 18:56:19 -0700635 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700636 to be set.
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100637 memtest=0, mean disabled; -- default
638 memtest=1, mean do 1 test pattern;
639 ...
640 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200641 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100642
643config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100644 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100645 depends on X86_32 && NUMA && X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100646
647config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100648 def_bool y
Alessandro Rubinif9b15df2011-10-29 00:48:42 +0200649 depends on X86_SUMMIT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100650
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100651source "arch/x86/Kconfig.cpu"
652
653config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100654 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100655 prompt "HPET Timer Support" if X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100656 ---help---
657 Use the IA-PC HPET (High Precision Event Timer) to manage
658 time in preference to the PIT and RTC, if a HPET is
659 present.
660 HPET is the next generation timer replacing legacy 8254s.
661 The HPET provides a stable time base on SMP
662 systems, unlike the TSC, but it is more expensive to access,
663 as it is off-chip. You can find the HPET spec at
664 <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100665
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100666 You can safely choose Y here. However, HPET will only be
667 activated if the platform and the BIOS support this feature.
668 Otherwise the 8254 will be used for timing services.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100669
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100670 Choose N to continue using the legacy 8254 timer.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100671
672config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100673 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800674 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100675
Jacob Panbb24c472009-09-02 07:37:17 -0700676config APB_TIMER
Alan Cox933b9462011-12-17 17:43:40 +0000677 def_bool y if X86_INTEL_MID
678 prompt "Intel MID APB Timer Support" if X86_INTEL_MID
Jamie Iles06c3df42011-06-06 12:43:07 +0100679 select DW_APB_TIMER
Alan Coxa0c38322011-12-17 21:57:25 +0000680 depends on X86_INTEL_MID && SFI
Jacob Panbb24c472009-09-02 07:37:17 -0700681 help
682 APB timer is the replacement for 8254, HPET on X86 MID platforms.
683 The APBT provides a stable time base on SMP
684 systems, unlike the TSC, but it is more expensive to access,
685 as it is off-chip. APB timers are always running regardless of CPU
686 C states, they are used as per CPU clockevent device when possible.
687
David Rientjes6a108a12011-01-20 14:44:16 -0800688# Mark as expert because too many people got it wrong.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100689# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700690config DMI
691 default y
David Rientjes6a108a12011-01-20 14:44:16 -0800692 bool "Enable DMI scanning" if EXPERT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100693 ---help---
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700694 Enabled scanning of DMI to identify machine quirks. Say Y
695 here unless you have verified that your setup is not
696 affected by entries in the DMI blacklist. Required by PNP
697 BIOS code.
698
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100699config GART_IOMMU
David Rientjes6a108a12011-01-20 14:44:16 -0800700 bool "GART IOMMU support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100701 default y
702 select SWIOTLB
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +0200703 depends on X86_64 && PCI && AMD_NB
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100704 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100705 Support for full DMA access of devices with 32bit memory access only
706 on systems with more than 3GB. This is usually needed for USB,
707 sound, many IDE/SATA chipsets and some other devices.
708 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
709 based hardware IOMMU and a software bounce buffer based IOMMU used
710 on Intel systems and as fallback.
711 The code is only active when needed (enough memory and limited
712 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
713 too.
714
715config CALGARY_IOMMU
716 bool "IBM Calgary IOMMU support"
717 select SWIOTLB
718 depends on X86_64 && PCI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100719 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100720 Support for hardware IOMMUs in IBM's xSeries x366 and x460
721 systems. Needed to run systems with more than 3GB of memory
722 properly with 32-bit PCI devices that do not support DAC
723 (Double Address Cycle). Calgary also supports bus level
724 isolation, where all DMAs pass through the IOMMU. This
725 prevents them from going anywhere except their intended
726 destination. This catches hard-to-find kernel bugs and
727 mis-behaving drivers and devices that do not use the DMA-API
728 properly to set up their DMA buffers. The IOMMU can be
729 turned off at boot time with the iommu=off parameter.
730 Normally the kernel will make the right choice by itself.
731 If unsure, say Y.
732
733config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100734 def_bool y
735 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100736 depends on CALGARY_IOMMU
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100737 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100738 Should Calgary be enabled by default? if you choose 'y', Calgary
739 will be used (if it exists). If you choose 'n', Calgary will not be
740 used even if it exists. If you choose 'n' and would like to use
741 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
742 If unsure, say Y.
743
744# need this always selected by IOMMU for the VIA workaround
745config SWIOTLB
Joerg Roedela1afd012008-11-18 12:44:21 +0100746 def_bool y if X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100747 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100748 Support for software bounce buffers used on x86-64 systems
749 which don't have a hardware IOMMU (e.g. the current generation
750 of Intel's x86-64 CPUs). Using this PCI devices which can only
751 access 32-bits of memory can be used on systems with more than
752 3 GB of memory. If unsure, say Y.
753
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700754config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900755 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700756
Mike Travis1184dc22008-05-12 21:21:12 +0200757config MAXSMP
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200758 bool "Enable Maximum number of SMP Processors and NUMA Nodes"
Mike Travis36f51012008-12-16 17:33:51 -0800759 depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
760 select CPUMASK_OFFSTACK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100761 ---help---
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200762 Enable maximum number of CPUS and NUMA Nodes for this architecture.
Mike Travis1184dc22008-05-12 21:21:12 +0200763 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100764
765config NR_CPUS
Mike Travis36f51012008-12-16 17:33:51 -0800766 int "Maximum number of CPUs" if SMP && !MAXSMP
Michael K. Johnson2a3313f2009-04-21 21:44:48 -0400767 range 2 8 if SMP && X86_32 && !X86_BIGSMP
Mike Travis36f51012008-12-16 17:33:51 -0800768 range 2 512 if SMP && !MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800769 default "1" if !SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700770 default "4096" if MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800771 default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
772 default "8" if SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100773 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100774 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700775 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100776 minimum value which makes sense is 2.
777
778 This is purely to save memory - each supported CPU adds
779 approximately eight kilobytes to the kernel image.
780
781config SCHED_SMT
782 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800783 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100784 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100785 SMT scheduler support improves the CPU scheduler's decision making
786 when dealing with Intel Pentium 4 chips with HyperThreading at a
787 cost of slightly increased overhead in some places. If unsure say
788 N here.
789
790config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100791 def_bool y
792 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800793 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100794 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100795 Multi-core scheduler support improves the CPU scheduler's decision
796 making when dealing with multi-core CPU chips at a cost of slightly
797 increased overhead in some places. If unsure say N here.
798
Venkatesh Pallipadie82b8e42010-10-04 17:03:20 -0700799config IRQ_TIME_ACCOUNTING
800 bool "Fine granularity task level IRQ time accounting"
801 default n
802 ---help---
803 Select this option to enable fine granularity task irq time
804 accounting. This is done by reading a timestamp on each
805 transitions between softirq and hardirq state, so there can be a
806 small performance impact.
807
808 If in doubt, say N here.
809
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100810source "kernel/Kconfig.preempt"
811
812config X86_UP_APIC
813 bool "Local APIC support on uniprocessors"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100814 depends on X86_32 && !SMP && !X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100815 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100816 A local APIC (Advanced Programmable Interrupt Controller) is an
817 integrated interrupt controller in the CPU. If you have a single-CPU
818 system which has a processor with a local APIC, you can say Y here to
819 enable and use it. If you say Y here even though your machine doesn't
820 have a local APIC, then the kernel will still run with no slowdown at
821 all. The local APIC supports CPU-generated self-interrupts (timer,
822 performance counters), and the NMI watchdog which detects hard
823 lockups.
824
825config X86_UP_IOAPIC
826 bool "IO-APIC support on uniprocessors"
827 depends on X86_UP_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100828 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100829 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
830 SMP-capable replacement for PC-style interrupt controllers. Most
831 SMP systems and many recent uniprocessor systems have one.
832
833 If you have a single-CPU system with an IO-APIC, you can say Y here
834 to use it. If you say Y here even though your machine doesn't have
835 an IO-APIC, then the kernel will still run with no slowdown at all.
836
837config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100838 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100839 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100840
841config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100842 def_bool y
Henrik Kretzschmar1444e0c2011-02-22 15:38:07 +0100843 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100844
845config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100846 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100847 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100848
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200849config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
850 bool "Reroute for broken boot IRQs"
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200851 depends on X86_IO_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100852 ---help---
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200853 This option enables a workaround that fixes a source of
854 spurious interrupts. This is recommended when threaded
855 interrupt handling is used on systems where the generation of
856 superfluous "boot interrupts" cannot be disabled.
857
858 Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
859 entry in the chipset's IO-APIC is masked (as, e.g. the RT
860 kernel does during interrupt handling). On chipsets where this
861 boot IRQ generation cannot be disabled, this workaround keeps
862 the original IRQ line masked so that only the equivalent "boot
863 IRQ" is delivered to the CPUs. The workaround also tells the
864 kernel to set up the IRQ handler on the boot IRQ line. In this
865 way only one interrupt is delivered to the kernel. Otherwise
866 the spurious second interrupt may cause the kernel to bring
867 down (vital) interrupt lines.
868
869 Only affects "broken" chipsets. Interrupt sharing may be
870 increased on these systems.
871
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100872config X86_MCE
Andi Kleenbab9bc62009-07-09 00:31:38 +0200873 bool "Machine Check / overheating reporting"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100874 ---help---
Andi Kleenbab9bc62009-07-09 00:31:38 +0200875 Machine Check support allows the processor to notify the
876 kernel if it detects a problem (e.g. overheating, data corruption).
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100877 The action the kernel takes depends on the severity of the problem,
Andi Kleenbab9bc62009-07-09 00:31:38 +0200878 ranging from warning messages to halting the machine.
Andi Kleen4efc0672009-04-28 19:07:31 +0200879
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100880config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100881 def_bool y
882 prompt "Intel MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200883 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100884 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100885 Additional support for intel specific MCE features such as
886 the thermal monitor.
887
888config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100889 def_bool y
890 prompt "AMD MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200891 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100892 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100893 Additional support for AMD specific MCE features such as
894 the DRAM Error Threshold.
895
Andi Kleen4efc0672009-04-28 19:07:31 +0200896config X86_ANCIENT_MCE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100897 bool "Support for old Pentium 5 / WinChip machine checks"
Andi Kleenc31d9632009-07-09 00:31:37 +0200898 depends on X86_32 && X86_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900899 ---help---
900 Include support for machine check handling on old Pentium 5 or WinChip
901 systems. These typically need to be enabled explicitely on the command
902 line.
Andi Kleen4efc0672009-04-28 19:07:31 +0200903
Andi Kleenb2762682009-02-12 13:49:31 +0100904config X86_MCE_THRESHOLD
905 depends on X86_MCE_AMD || X86_MCE_INTEL
Jan Beulich6fc108a2010-04-21 15:23:44 +0100906 def_bool y
Andi Kleenb2762682009-02-12 13:49:31 +0100907
Andi Kleenea149b32009-04-29 19:31:00 +0200908config X86_MCE_INJECT
Andi Kleenc1ebf832009-07-09 00:31:41 +0200909 depends on X86_MCE
Andi Kleenea149b32009-04-29 19:31:00 +0200910 tristate "Machine check injector support"
911 ---help---
912 Provide support for injecting machine checks for testing purposes.
913 If you don't know what a machine check is and you don't do kernel
914 QA it is safe to say n.
915
Andi Kleen4efc0672009-04-28 19:07:31 +0200916config X86_THERMAL_VECTOR
917 def_bool y
Andi Kleen5bb38ad2009-07-09 00:31:39 +0200918 depends on X86_MCE_INTEL
Andi Kleen4efc0672009-04-28 19:07:31 +0200919
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100920config VM86
David Rientjes6a108a12011-01-20 14:44:16 -0800921 bool "Enable VM86 support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100922 default y
923 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100924 ---help---
925 This option is required by programs like DOSEMU to run 16-bit legacy
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100926 code on X86 processors. It also may be needed by software like
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100927 XFree86 to initialize some video cards via BIOS. Disabling this
928 option saves about 6k.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100929
930config TOSHIBA
931 tristate "Toshiba Laptop support"
932 depends on X86_32
933 ---help---
934 This adds a driver to safely access the System Management Mode of
935 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
936 not work on models with a Phoenix BIOS. The System Management Mode
937 is used to set the BIOS and power saving options on Toshiba portables.
938
939 For information on utilities to make use of this driver see the
940 Toshiba Linux utilities web site at:
941 <http://www.buzzard.org.uk/toshiba/>.
942
943 Say Y if you intend to run this kernel on a Toshiba portable.
944 Say N otherwise.
945
946config I8K
947 tristate "Dell laptop support"
Jean Delvare949a9d72011-05-25 20:43:33 +0200948 select HWMON
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100949 ---help---
950 This adds a driver to safely access the System Management Mode
951 of the CPU on the Dell Inspiron 8000. The System Management Mode
952 is used to read cpu temperature and cooling fan status and to
953 control the fans on the I8K portables.
954
955 This driver has been tested only on the Inspiron 8000 but it may
956 also work with other Dell laptops. You can force loading on other
957 models by passing the parameter `force=1' to the module. Use at
958 your own risk.
959
960 For information on utilities to make use of this driver see the
961 I8K Linux utilities web site at:
962 <http://people.debian.org/~dz/i8k/>
963
964 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
965 Say N otherwise.
966
967config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700968 bool "Enable X86 board specific fixups for reboot"
969 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100970 ---help---
971 This enables chipset and/or board specific fixups to be done
972 in order to get reboot to work correctly. This is only needed on
973 some combinations of hardware and BIOS. The symptom, for which
974 this config is intended, is when reboot ends with a stalled/hung
975 system.
976
977 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100978 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100979
980 Say Y if you want to enable the fixup. Currently, it's safe to
981 enable this option even if you don't need it.
982 Say N otherwise.
983
984config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200985 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100986 select FW_LOADER
987 ---help---
988 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200989 certain Intel and AMD processors. The Intel support is for the
990 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
991 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
992 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
993 You will obviously need the actual microcode binary data itself
994 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100995
Peter Oruba8d86f392008-07-28 18:44:21 +0200996 This option selects the general module only, you need to select
997 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100998
999 To compile this driver as a module, choose M here: the
1000 module will be called microcode.
1001
Peter Oruba8d86f392008-07-28 18:44:21 +02001002config MICROCODE_INTEL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001003 bool "Intel microcode patch loading support"
1004 depends on MICROCODE
1005 default MICROCODE
1006 select FW_LOADER
1007 ---help---
1008 This options enables microcode patch loading support for Intel
1009 processors.
Peter Oruba8d86f392008-07-28 18:44:21 +02001010
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001011 For latest news and information on obtaining all the required
1012 Intel ingredients for this driver, check:
1013 <http://www.urbanmyth.org/microcode/>.
Peter Oruba8d86f392008-07-28 18:44:21 +02001014
Peter Oruba80cc9f12008-07-28 18:44:22 +02001015config MICROCODE_AMD
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001016 bool "AMD microcode patch loading support"
1017 depends on MICROCODE
1018 select FW_LOADER
1019 ---help---
1020 If you select this option, microcode patch loading support for AMD
1021 processors will be enabled.
Peter Oruba80cc9f12008-07-28 18:44:22 +02001022
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001023config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001024 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001025 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001026
1027config X86_MSR
1028 tristate "/dev/cpu/*/msr - Model-specific register support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001029 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001030 This device gives privileged processes access to the x86
1031 Model-Specific Registers (MSRs). It is a character device with
1032 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
1033 MSR accesses are directed to a specific CPU on multi-processor
1034 systems.
1035
1036config X86_CPUID
1037 tristate "/dev/cpu/*/cpuid - CPU information support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001038 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001039 This device gives processes access to the x86 CPUID instruction to
1040 be executed on a specific processor. It is a character device
1041 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
1042 /dev/cpu/31/cpuid.
1043
1044choice
1045 prompt "High Memory Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001046 default HIGHMEM64G if X86_NUMAQ
Jan Beulich6fc108a2010-04-21 15:23:44 +01001047 default HIGHMEM4G
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001048 depends on X86_32
1049
1050config NOHIGHMEM
1051 bool "off"
1052 depends on !X86_NUMAQ
1053 ---help---
1054 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
1055 However, the address space of 32-bit x86 processors is only 4
1056 Gigabytes large. That means that, if you have a large amount of
1057 physical memory, not all of it can be "permanently mapped" by the
1058 kernel. The physical memory that's not permanently mapped is called
1059 "high memory".
1060
1061 If you are compiling a kernel which will never run on a machine with
1062 more than 1 Gigabyte total physical RAM, answer "off" here (default
1063 choice and suitable for most users). This will result in a "3GB/1GB"
1064 split: 3GB are mapped so that each process sees a 3GB virtual memory
1065 space and the remaining part of the 4GB virtual memory space is used
1066 by the kernel to permanently map as much physical memory as
1067 possible.
1068
1069 If the machine has between 1 and 4 Gigabytes physical RAM, then
1070 answer "4GB" here.
1071
1072 If more than 4 Gigabytes is used then answer "64GB" here. This
1073 selection turns Intel PAE (Physical Address Extension) mode on.
1074 PAE implements 3-level paging on IA32 processors. PAE is fully
1075 supported by Linux, PAE mode is implemented on all recent Intel
1076 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
1077 then the kernel will not boot on CPUs that don't support PAE!
1078
1079 The actual amount of total physical memory will either be
1080 auto detected or can be forced by using a kernel command line option
1081 such as "mem=256M". (Try "man bootparam" or see the documentation of
1082 your boot loader (lilo or loadlin) about how to pass options to the
1083 kernel at boot time.)
1084
1085 If unsure, say "off".
1086
1087config HIGHMEM4G
1088 bool "4GB"
1089 depends on !X86_NUMAQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001090 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001091 Select this if you have a 32-bit processor and between 1 and 4
1092 gigabytes of physical RAM.
1093
1094config HIGHMEM64G
1095 bool "64GB"
1096 depends on !M386 && !M486
1097 select X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001098 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001099 Select this if you have a 32-bit processor and more than 4
1100 gigabytes of physical RAM.
1101
1102endchoice
1103
1104choice
1105 depends on EXPERIMENTAL
David Rientjes6a108a12011-01-20 14:44:16 -08001106 prompt "Memory split" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001107 default VMSPLIT_3G
1108 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001109 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001110 Select the desired split between kernel and user memory.
1111
1112 If the address range available to the kernel is less than the
1113 physical memory installed, the remaining memory will be available
1114 as "high memory". Accessing high memory is a little more costly
1115 than low memory, as it needs to be mapped into the kernel first.
1116 Note that increasing the kernel address space limits the range
1117 available to user programs, making the address space there
1118 tighter. Selecting anything other than the default 3G/1G split
1119 will also likely make your kernel incompatible with binary-only
1120 kernel modules.
1121
1122 If you are not absolutely sure what you are doing, leave this
1123 option alone!
1124
1125 config VMSPLIT_3G
1126 bool "3G/1G user/kernel split"
1127 config VMSPLIT_3G_OPT
1128 depends on !X86_PAE
1129 bool "3G/1G user/kernel split (for full 1G low memory)"
1130 config VMSPLIT_2G
1131 bool "2G/2G user/kernel split"
1132 config VMSPLIT_2G_OPT
1133 depends on !X86_PAE
1134 bool "2G/2G user/kernel split (for full 2G low memory)"
1135 config VMSPLIT_1G
1136 bool "1G/3G user/kernel split"
1137endchoice
1138
1139config PAGE_OFFSET
1140 hex
1141 default 0xB0000000 if VMSPLIT_3G_OPT
1142 default 0x80000000 if VMSPLIT_2G
1143 default 0x78000000 if VMSPLIT_2G_OPT
1144 default 0x40000000 if VMSPLIT_1G
1145 default 0xC0000000
1146 depends on X86_32
1147
1148config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001149 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001150 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001151
1152config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -07001153 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001154 depends on X86_32 && !HIGHMEM4G
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001155 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001156 PAE is required for NX support, and furthermore enables
1157 larger swapspace support for non-overcommit purposes. It
1158 has the cost of more pagetable lookup overhead, and also
1159 consumes more pagetable space per process.
1160
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001161config ARCH_PHYS_ADDR_T_64BIT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001162 def_bool X86_64 || X86_PAE
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001163
FUJITA Tomonori66f2b062010-10-20 15:55:35 -07001164config ARCH_DMA_ADDR_T_64BIT
1165 def_bool X86_64 || HIGHMEM64G
1166
Nick Piggin9e899812008-10-22 12:33:16 +02001167config DIRECT_GBPAGES
David Rientjes6a108a12011-01-20 14:44:16 -08001168 bool "Enable 1GB pages for kernel pagetables" if EXPERT
Nick Piggin9e899812008-10-22 12:33:16 +02001169 default y
1170 depends on X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001171 ---help---
Nick Piggin9e899812008-10-22 12:33:16 +02001172 Allow the kernel linear mapping to use 1GB pages on CPUs that
1173 support it. This can improve the kernel's performance a tiny bit by
1174 reducing TLB pressure. If in doubt, say "Y".
1175
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001176# Common NUMA Features
1177config NUMA
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001178 bool "Numa Memory Allocation and Scheduler Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001179 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +01001180 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Yinghai Lu0699eae2008-06-17 15:39:01 -07001181 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001182 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001183 Enable NUMA (Non Uniform Memory Access) support.
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001184
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001185 The kernel will try to allocate memory used by a CPU on the
1186 local memory controller of the CPU and add some more
1187 NUMA awareness to the kernel.
1188
Ingo Molnarc280ea52008-11-08 13:29:45 +01001189 For 64-bit this is recommended if the system is Intel Core i7
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001190 (or later), AMD Opteron, or EM64T NUMA.
1191
1192 For 32-bit this is only needed on (rare) 32-bit-only platforms
1193 that support NUMA topologies, such as NUMAQ / Summit, or if you
1194 boot a 32-bit kernel on a 64-bit NUMA platform.
1195
1196 Otherwise, you should say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001197
1198comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
1199 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
1200
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001201config AMD_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001202 def_bool y
1203 prompt "Old style AMD Opteron NUMA detection"
Tejun Heo5da0ef92011-07-11 10:34:32 +02001204 depends on X86_64 && NUMA && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001205 ---help---
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001206 Enable AMD NUMA node topology detection. You should say Y here if
1207 you have a multi processor AMD system. This uses an old method to
1208 read the NUMA configuration directly from the builtin Northbridge
1209 of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
1210 which also takes priority if both are compiled in.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001211
1212config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001213 def_bool y
1214 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001215 depends on X86_64 && NUMA && ACPI && PCI
1216 select ACPI_NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001217 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001218 Enable ACPI SRAT based node topology detection.
1219
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001220# Some NUMA nodes have memory ranges that span
1221# other nodes. Even though a pfn is valid and
1222# between a node's start and end pfns, it may not
1223# reside on that node. See memmap_init_zone()
1224# for details.
1225config NODES_SPAN_OTHER_NODES
1226 def_bool y
1227 depends on X86_64_ACPI_NUMA
1228
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001229config NUMA_EMU
1230 bool "NUMA emulation"
Tejun Heo1b7e03e2011-05-02 17:24:48 +02001231 depends on NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001232 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001233 Enable NUMA emulation. A flat machine will be split
1234 into virtual nodes when booted with "numa=fake=N", where N is the
1235 number of nodes. This is only useful for debugging.
1236
1237config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001238 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
David Rientjes51591e32010-03-25 15:39:27 -07001239 range 1 10
1240 default "10" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001241 default "6" if X86_64
1242 default "4" if X86_NUMAQ
1243 default "3"
1244 depends on NEED_MULTIPLE_NODES
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001245 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +02001246 Specify the maximum number of NUMA Nodes available on the target
Matt LaPlante692105b2009-01-26 11:12:25 +01001247 system. Increases memory reserved to accommodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001248
Tejun Heo3b166512011-04-01 11:15:12 +02001249config HAVE_ARCH_ALLOC_REMAP
1250 def_bool y
1251 depends on X86_32 && NUMA
1252
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001253config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001254 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001255 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001256
1257config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001258 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001259 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001260
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001261config ARCH_FLATMEM_ENABLE
1262 def_bool y
Tejun Heo3b166512011-04-01 11:15:12 +02001263 depends on X86_32 && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001264
1265config ARCH_DISCONTIGMEM_ENABLE
1266 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001267 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001268
1269config ARCH_DISCONTIGMEM_DEFAULT
1270 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001271 depends on NUMA && X86_32
1272
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001273config ARCH_SPARSEMEM_ENABLE
1274 def_bool y
Yinghai Lu4272ebf2009-01-29 15:14:46 -08001275 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001276 select SPARSEMEM_STATIC if X86_32
1277 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1278
Tejun Heo3b166512011-04-01 11:15:12 +02001279config ARCH_SPARSEMEM_DEFAULT
1280 def_bool y
1281 depends on X86_64
1282
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001283config ARCH_SELECT_MEMORY_MODEL
1284 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001285 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001286
1287config ARCH_MEMORY_PROBE
1288 def_bool X86_64
1289 depends on MEMORY_HOTPLUG
1290
Tejun Heo3b166512011-04-01 11:15:12 +02001291config ARCH_PROC_KCORE_TEXT
1292 def_bool y
1293 depends on X86_64 && PROC_KCORE
1294
Avi Kivitya29815a2010-01-10 16:28:09 +02001295config ILLEGAL_POINTER_VALUE
1296 hex
1297 default 0 if X86_32
1298 default 0xdead000000000000 if X86_64
1299
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001300source "mm/Kconfig"
1301
1302config HIGHPTE
1303 bool "Allocate 3rd-level pagetables from highmem"
Jan Beulich6fc108a2010-04-21 15:23:44 +01001304 depends on HIGHMEM
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001305 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001306 The VM uses one page table entry for each page of physical memory.
1307 For systems with a lot of RAM, this can be wasteful of precious
1308 low memory. Setting this option will put user-space page table
1309 entries in high memory.
1310
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001311config X86_CHECK_BIOS_CORRUPTION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001312 bool "Check for low memory corruption"
1313 ---help---
1314 Periodically check for memory corruption in low memory, which
1315 is suspected to be caused by BIOS. Even when enabled in the
1316 configuration, it is disabled at runtime. Enable it by
1317 setting "memory_corruption_check=1" on the kernel command
1318 line. By default it scans the low 64k of memory every 60
1319 seconds; see the memory_corruption_check_size and
1320 memory_corruption_check_period parameters in
1321 Documentation/kernel-parameters.txt to adjust this.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001322
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001323 When enabled with the default parameters, this option has
1324 almost no overhead, as it reserves a relatively small amount
1325 of memory and scans it infrequently. It both detects corruption
1326 and prevents it from affecting the running system.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001327
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001328 It is, however, intended as a diagnostic tool; if repeatable
1329 BIOS-originated corruption always affects the same memory,
1330 you can use memmap= to prevent the kernel from using that
1331 memory.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001332
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001333config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001334 bool "Set the default setting of memory_corruption_check"
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001335 depends on X86_CHECK_BIOS_CORRUPTION
1336 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001337 ---help---
1338 Set whether the default state of memory_corruption_check is
1339 on or off.
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001340
H. Peter Anvin9ea77bd2010-08-25 16:38:20 -07001341config X86_RESERVE_LOW
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001342 int "Amount of low memory, in kilobytes, to reserve for the BIOS"
1343 default 64
1344 range 4 640
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001345 ---help---
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001346 Specify the amount of low memory to reserve for the BIOS.
Ingo Molnarfc381512008-09-16 10:07:34 +02001347
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001348 The first page contains BIOS data structures that the kernel
1349 must not use, so that page must always be reserved.
Ingo Molnarfc381512008-09-16 10:07:34 +02001350
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001351 By default we reserve the first 64K of physical RAM, as a
1352 number of BIOSes are known to corrupt that memory range
1353 during events such as suspend/resume or monitor cable
1354 insertion, so it must not be used by the kernel.
Ingo Molnarfc381512008-09-16 10:07:34 +02001355
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001356 You can set this to 4 if you are absolutely sure that you
1357 trust the BIOS to get all its memory reservations and usages
1358 right. If you know your BIOS have problems beyond the
1359 default 64K area, you can set this to 640 to avoid using the
1360 entire low memory range.
1361
1362 If you have doubts about the BIOS (e.g. suspend/resume does
1363 not work or there's kernel crashes after certain hardware
1364 hotplug events) then you might want to enable
1365 X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check
1366 typical corruption patterns.
1367
1368 Leave this to the default value of 64 if you are unsure.
Ingo Molnarfc381512008-09-16 10:07:34 +02001369
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001370config MATH_EMULATION
1371 bool
1372 prompt "Math emulation" if X86_32
1373 ---help---
1374 Linux can emulate a math coprocessor (used for floating point
1375 operations) if you don't have one. 486DX and Pentium processors have
1376 a math coprocessor built in, 486SX and 386 do not, unless you added
1377 a 487DX or 387, respectively. (The messages during boot time can
1378 give you some hints here ["man dmesg"].) Everyone needs either a
1379 coprocessor or this emulation.
1380
1381 If you don't have a math coprocessor, you need to say Y here; if you
1382 say Y here even though you have a coprocessor, the coprocessor will
1383 be used nevertheless. (This behavior can be changed with the kernel
1384 command line option "no387", which comes handy if your coprocessor
1385 is broken. Try "man bootparam" or see the documentation of your boot
1386 loader (lilo or loadlin) about how to pass options to the kernel at
1387 boot time.) This means that it is a good idea to say Y here if you
1388 intend to use this kernel on different machines.
1389
1390 More information about the internals of the Linux math coprocessor
1391 emulation can be found in <file:arch/x86/math-emu/README>.
1392
1393 If you are not sure, say Y; apart from resulting in a 66 KB bigger
1394 kernel, it won't hurt.
1395
1396config MTRR
Jan Beulich6fc108a2010-04-21 15:23:44 +01001397 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001398 prompt "MTRR (Memory Type Range Register) support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001399 ---help---
1400 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1401 the Memory Type Range Registers (MTRRs) may be used to control
1402 processor access to memory ranges. This is most useful if you have
1403 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1404 allows bus write transfers to be combined into a larger transfer
1405 before bursting over the PCI/AGP bus. This can increase performance
1406 of image write operations 2.5 times or more. Saying Y here creates a
1407 /proc/mtrr file which may be used to manipulate your processor's
1408 MTRRs. Typically the X server should use this.
1409
1410 This code has a reasonably generic interface so that similar
1411 control registers on other processors can be easily supported
1412 as well:
1413
1414 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1415 Registers (ARRs) which provide a similar functionality to MTRRs. For
1416 these, the ARRs are used to emulate the MTRRs.
1417 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1418 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1419 write-combining. All of these processors are supported by this code
1420 and it makes sense to say Y here if you have one of them.
1421
1422 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1423 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1424 can lead to all sorts of problems, so it's good to say Y here.
1425
1426 You can safely say Y even if your machine doesn't have MTRRs, you'll
1427 just add about 9 KB to your kernel.
1428
Randy Dunlap7225e752008-07-26 17:54:22 -07001429 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001430
Yinghai Lu95ffa242008-04-29 03:52:33 -07001431config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001432 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001433 prompt "MTRR cleanup support"
1434 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001435 ---help---
Thomas Gleixneraba37282008-07-15 14:48:48 +02001436 Convert MTRR layout from continuous to discrete, so X drivers can
1437 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001438
Thomas Gleixneraba37282008-07-15 14:48:48 +02001439 Can be disabled with disable_mtrr_cleanup on the kernel command line.
Matt LaPlante692105b2009-01-26 11:12:25 +01001440 The largest mtrr entry size for a continuous block can be set with
Thomas Gleixneraba37282008-07-15 14:48:48 +02001441 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001442
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001443 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001444
1445config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001446 int "MTRR cleanup enable value (0-1)"
1447 range 0 1
1448 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001449 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001450 ---help---
Yinghai Luf5098d62008-04-29 20:25:58 -07001451 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001452
Yinghai Lu12031a62008-05-02 02:40:22 -07001453config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1454 int "MTRR cleanup spare reg num (0-7)"
1455 range 0 7
1456 default "1"
1457 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001458 ---help---
Yinghai Lu12031a62008-05-02 02:40:22 -07001459 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001460 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001461
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001462config X86_PAT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001463 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001464 prompt "x86 PAT support" if EXPERT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001465 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001466 ---help---
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001467 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001468
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001469 PATs are the modern equivalents of MTRRs and are much more
1470 flexible than MTRRs.
1471
1472 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001473 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001474
1475 If unsure, say Y.
1476
Venkatesh Pallipadi46cf98c2009-07-10 09:57:37 -07001477config ARCH_USES_PG_UNCACHED
1478 def_bool y
1479 depends on X86_PAT
1480
H. Peter Anvin628c6242011-07-31 13:59:29 -07001481config ARCH_RANDOM
1482 def_bool y
1483 prompt "x86 architectural random number generator" if EXPERT
1484 ---help---
1485 Enable the x86 architectural RDRAND instruction
1486 (Intel Bull Mountain technology) to generate random numbers.
1487 If supported, this is a high bandwidth, cryptographically
1488 secure hardware random number generator.
1489
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001490config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001491 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001492 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001493 ---help---
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001494 This enables the kernel to use EFI runtime services that are
1495 available (such as the EFI variable services).
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001496
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001497 This option is only useful on systems that have EFI firmware.
1498 In addition, you should use the latest ELILO loader available
1499 at <http://elilo.sourceforge.net> in order to take advantage
1500 of EFI runtime services. However, even with this option, the
1501 resultant kernel should continue to boot on existing non-EFI
1502 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001503
Matt Fleming291f3632011-12-12 21:27:52 +00001504config EFI_STUB
1505 bool "EFI stub support"
1506 depends on EFI
1507 ---help---
1508 This kernel feature allows a bzImage to be loaded directly
1509 by EFI firmware without the use of a bootloader.
1510
Matt Fleming0c759662012-03-16 12:03:13 +00001511 See Documentation/x86/efi-stub.txt for more information.
1512
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001513config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001514 def_bool y
1515 prompt "Enable seccomp to safely compute untrusted bytecode"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001516 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001517 This kernel feature is useful for number crunching applications
1518 that may need to compute untrusted bytecode during their
1519 execution. By using pipes or other transports made available to
1520 the process as file descriptors supporting the read/write
1521 syscalls, it's possible to isolate those applications in
1522 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001523 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001524 and the task is only allowed to execute a few safe syscalls
1525 defined by each seccomp mode.
1526
1527 If unsure, say Y. Only embedded should say N here.
1528
1529config CC_STACKPROTECTOR
Jean Delvare2a8ac742012-07-06 16:08:25 +02001530 bool "Enable -fstack-protector buffer overflow detection"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001531 ---help---
1532 This option turns on the -fstack-protector GCC feature. This
Ingo Molnar113c5412008-02-14 10:36:03 +01001533 feature puts, at the beginning of functions, a canary value on
1534 the stack just before the return address, and validates
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001535 the value just before actually returning. Stack based buffer
1536 overflows (that need to overwrite this return address) now also
1537 overwrite the canary, which gets detected and the attack is then
1538 neutralized via a kernel panic.
1539
1540 This feature requires gcc version 4.2 or above, or a distribution
1541 gcc with the feature backported. Older versions are automatically
Ingo Molnar113c5412008-02-14 10:36:03 +01001542 detected and for those versions, this configuration option is
1543 ignored. (and a warning is printed during bootup)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001544
1545source kernel/Kconfig.hz
1546
1547config KEXEC
1548 bool "kexec system call"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001549 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001550 kexec is a system call that implements the ability to shutdown your
1551 current kernel, and to start another kernel. It is like a reboot
1552 but it is independent of the system firmware. And like a reboot
1553 you can start any kernel with it, not just Linux.
1554
1555 The name comes from the similarity to the exec system call.
1556
1557 It is an ongoing process to be certain the hardware in a machine
1558 is properly shutdown, so do not be surprised if this code does not
1559 initially work for you. It may help to enable device hotplugging
1560 support. As of this writing the exact hardware interface is
1561 strongly in flux, so no good recommendation can be made.
1562
1563config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001564 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001565 depends on X86_64 || (X86_32 && HIGHMEM)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001566 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001567 Generate crash dump after being started by kexec.
1568 This should be normally only set in special crash dump kernels
1569 which are loaded in the main kernel with kexec-tools into
1570 a specially reserved region and then later executed after
1571 a crash by kdump/kexec. The crash dump kernel must be compiled
1572 to a memory address not used by the main kernel or BIOS using
1573 PHYSICAL_START, or it must be built as a relocatable image
1574 (CONFIG_RELOCATABLE=y).
1575 For more details see Documentation/kdump/kdump.txt
1576
Huang Ying3ab83522008-07-25 19:45:07 -07001577config KEXEC_JUMP
1578 bool "kexec jump (EXPERIMENTAL)"
1579 depends on EXPERIMENTAL
Huang Yingfee7b0d2009-03-10 10:57:16 +08001580 depends on KEXEC && HIBERNATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001581 ---help---
Huang Ying89081d12008-07-25 19:45:10 -07001582 Jump between original kernel and kexeced kernel and invoke
1583 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001584
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001585config PHYSICAL_START
David Rientjes6a108a12011-01-20 14:44:16 -08001586 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001587 default "0x1000000"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001588 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001589 This gives the physical address where the kernel is loaded.
1590
1591 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1592 bzImage will decompress itself to above physical address and
1593 run from there. Otherwise, bzImage will run from the address where
1594 it has been loaded by the boot loader and will ignore above physical
1595 address.
1596
1597 In normal kdump cases one does not have to set/change this option
1598 as now bzImage can be compiled as a completely relocatable image
1599 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1600 address. This option is mainly useful for the folks who don't want
1601 to use a bzImage for capturing the crash dump and want to use a
1602 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1603 to be specifically compiled to run from a specific memory area
1604 (normally a reserved region) and this option comes handy.
1605
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001606 So if you are using bzImage for capturing the crash dump,
1607 leave the value here unchanged to 0x1000000 and set
1608 CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
1609 for capturing the crash dump change this value to start of
1610 the reserved region. In other words, it can be set based on
1611 the "X" value as specified in the "crashkernel=YM@XM"
1612 command line boot parameter passed to the panic-ed
1613 kernel. Please take a look at Documentation/kdump/kdump.txt
1614 for more details about crash dumps.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001615
1616 Usage of bzImage for capturing the crash dump is recommended as
1617 one does not have to build two kernels. Same kernel can be used
1618 as production kernel and capture kernel. Above option should have
1619 gone away after relocatable bzImage support is introduced. But it
1620 is present because there are users out there who continue to use
1621 vmlinux for dump capture. This option should go away down the
1622 line.
1623
1624 Don't change this unless you know what you are doing.
1625
1626config RELOCATABLE
H. Peter Anvin26717802009-05-07 14:19:34 -07001627 bool "Build a relocatable kernel"
1628 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001629 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001630 This builds a kernel image that retains relocation information
1631 so it can be loaded someplace besides the default 1MB.
1632 The relocations tend to make the kernel binary about 10% larger,
1633 but are discarded at runtime.
1634
1635 One use is for the kexec on panic case where the recovery kernel
1636 must live at a different physical address than the primary
1637 kernel.
1638
1639 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1640 it has been loaded at and the compile time physical address
1641 (CONFIG_PHYSICAL_START) is ignored.
1642
H. Peter Anvin845adf72009-05-05 21:20:51 -07001643# Relocation on x86-32 needs some additional build support
1644config X86_NEED_RELOCS
1645 def_bool y
1646 depends on X86_32 && RELOCATABLE
1647
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001648config PHYSICAL_ALIGN
Jan Beulich6fc108a2010-04-21 15:23:44 +01001649 hex "Alignment value to which kernel should be aligned" if X86_32
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001650 default "0x1000000"
1651 range 0x2000 0x1000000
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001652 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001653 This value puts the alignment restrictions on physical address
1654 where kernel is loaded and run from. Kernel is compiled for an
1655 address which meets above alignment restriction.
1656
1657 If bootloader loads the kernel at a non-aligned address and
1658 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1659 address aligned to above value and run from there.
1660
1661 If bootloader loads the kernel at a non-aligned address and
1662 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1663 load address and decompress itself to the address it has been
1664 compiled for and run from there. The address for which kernel is
1665 compiled already meets above alignment restrictions. Hence the
1666 end result is that kernel runs from a physical address meeting
1667 above alignment restrictions.
1668
1669 Don't change this unless you know what you are doing.
1670
1671config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001672 bool "Support for hot-pluggable CPUs"
Ingo Molnar4b19ed912009-01-27 17:47:24 +01001673 depends on SMP && HOTPLUG
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001674 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001675 Say Y here to allow turning CPUs off and on. CPUs can be
1676 controlled through /sys/devices/system/cpu.
1677 ( Note: power management support will enable this option
1678 automatically on SMP systems. )
1679 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001680
1681config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001682 def_bool y
1683 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001684 depends on X86_32 || IA32_EMULATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001685 ---help---
Roland McGrathaf65d642008-01-30 13:30:43 +01001686 Map the 32-bit VDSO to the predictable old-style address too.
Randy Dunlape84446d2009-11-10 15:46:52 -08001687
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001688 Say N here if you are running a sufficiently recent glibc
1689 version (2.3.3 or later), to remove the high-mapped
1690 VDSO mapping and to exclusively use the randomized VDSO.
1691
1692 If unsure, say Y.
1693
Tim Bird516cbf32008-08-12 12:52:36 -07001694config CMDLINE_BOOL
1695 bool "Built-in kernel command line"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001696 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001697 Allow for specifying boot arguments to the kernel at
1698 build time. On some systems (e.g. embedded ones), it is
1699 necessary or convenient to provide some or all of the
1700 kernel boot arguments with the kernel itself (that is,
1701 to not rely on the boot loader to provide them.)
1702
1703 To compile command line arguments into the kernel,
1704 set this option to 'Y', then fill in the
1705 the boot arguments in CONFIG_CMDLINE.
1706
1707 Systems with fully functional boot loaders (i.e. non-embedded)
1708 should leave this option set to 'N'.
1709
1710config CMDLINE
1711 string "Built-in kernel command string"
1712 depends on CMDLINE_BOOL
1713 default ""
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001714 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001715 Enter arguments here that should be compiled into the kernel
1716 image and used at boot time. If the boot loader provides a
1717 command line at boot time, it is appended to this string to
1718 form the full kernel command line, when the system boots.
1719
1720 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1721 change this behavior.
1722
1723 In most cases, the command line (whether built-in or provided
1724 by the boot loader) should specify the device for the root
1725 file system.
1726
1727config CMDLINE_OVERRIDE
1728 bool "Built-in command line overrides boot loader arguments"
Tim Bird516cbf32008-08-12 12:52:36 -07001729 depends on CMDLINE_BOOL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001730 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001731 Set this option to 'Y' to have the kernel ignore the boot loader
1732 command line, and use ONLY the built-in command line.
1733
1734 This is used to work around broken boot loaders. This should
1735 be set to 'N' under normal conditions.
1736
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001737endmenu
1738
1739config ARCH_ENABLE_MEMORY_HOTPLUG
1740 def_bool y
1741 depends on X86_64 || (X86_32 && HIGHMEM)
1742
Gary Hade35551052008-10-31 10:52:03 -07001743config ARCH_ENABLE_MEMORY_HOTREMOVE
1744 def_bool y
1745 depends on MEMORY_HOTPLUG
1746
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001747config USE_PERCPU_NUMA_NODE_ID
Tejun Heo645a7912011-01-23 14:37:40 +01001748 def_bool y
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001749 depends on NUMA
1750
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001751menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001752
1753config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001754 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001755 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001756
1757source "kernel/power/Kconfig"
1758
1759source "drivers/acpi/Kconfig"
1760
Feng Tangefafc8b2009-08-14 15:23:29 -04001761source "drivers/sfi/Kconfig"
1762
Andi Kleena6b68072008-01-30 13:32:49 +01001763config X86_APM_BOOT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001764 def_bool y
Paul Bolle282e5aa2011-11-17 11:41:31 +01001765 depends on APM
Andi Kleena6b68072008-01-30 13:32:49 +01001766
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001767menuconfig APM
1768 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001769 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001770 ---help---
1771 APM is a BIOS specification for saving power using several different
1772 techniques. This is mostly useful for battery powered laptops with
1773 APM compliant BIOSes. If you say Y here, the system time will be
1774 reset after a RESUME operation, the /proc/apm device will provide
1775 battery status information, and user-space programs will receive
1776 notification of APM "events" (e.g. battery status change).
1777
1778 If you select "Y" here, you can disable actual use of the APM
1779 BIOS by passing the "apm=off" option to the kernel at boot time.
1780
1781 Note that the APM support is almost completely disabled for
1782 machines with more than one CPU.
1783
1784 In order to use APM, you will need supporting software. For location
Michael Witten2dc98fd2011-07-08 21:11:16 +00001785 and more information, read <file:Documentation/power/apm-acpi.txt>
1786 and the Battery Powered Linux mini-HOWTO, available from
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001787 <http://www.tldp.org/docs.html#howto>.
1788
1789 This driver does not spin down disk drives (see the hdparm(8)
1790 manpage ("man 8 hdparm") for that), and it doesn't turn off
1791 VESA-compliant "green" monitors.
1792
1793 This driver does not support the TI 4000M TravelMate and the ACER
1794 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1795 desktop machines also don't have compliant BIOSes, and this driver
1796 may cause those machines to panic during the boot phase.
1797
1798 Generally, if you don't have a battery in your machine, there isn't
1799 much point in using this driver and you should say N. If you get
1800 random kernel OOPSes or reboots that don't seem to be related to
1801 anything, try disabling/enabling this option (or disabling/enabling
1802 APM in your BIOS).
1803
1804 Some other things you should try when experiencing seemingly random,
1805 "weird" problems:
1806
1807 1) make sure that you have enough swap space and that it is
1808 enabled.
1809 2) pass the "no-hlt" option to the kernel
1810 3) switch on floating point emulation in the kernel and pass
1811 the "no387" option to the kernel
1812 4) pass the "floppy=nodma" option to the kernel
1813 5) pass the "mem=4M" option to the kernel (thereby disabling
1814 all but the first 4 MB of RAM)
1815 6) make sure that the CPU is not over clocked.
1816 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1817 8) disable the cache from your BIOS settings
1818 9) install a fan for the video card or exchange video RAM
1819 10) install a better fan for the CPU
1820 11) exchange RAM chips
1821 12) exchange the motherboard.
1822
1823 To compile this driver as a module, choose M here: the
1824 module will be called apm.
1825
1826if APM
1827
1828config APM_IGNORE_USER_SUSPEND
1829 bool "Ignore USER SUSPEND"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001830 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001831 This option will ignore USER SUSPEND requests. On machines with a
1832 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1833 series notebooks, it is necessary to say Y because of a BIOS bug.
1834
1835config APM_DO_ENABLE
1836 bool "Enable PM at boot time"
1837 ---help---
1838 Enable APM features at boot time. From page 36 of the APM BIOS
1839 specification: "When disabled, the APM BIOS does not automatically
1840 power manage devices, enter the Standby State, enter the Suspend
1841 State, or take power saving steps in response to CPU Idle calls."
1842 This driver will make CPU Idle calls when Linux is idle (unless this
1843 feature is turned off -- see "Do CPU IDLE calls", below). This
1844 should always save battery power, but more complicated APM features
1845 will be dependent on your BIOS implementation. You may need to turn
1846 this option off if your computer hangs at boot time when using APM
1847 support, or if it beeps continuously instead of suspending. Turn
1848 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1849 T400CDT. This is off by default since most machines do fine without
1850 this feature.
1851
1852config APM_CPU_IDLE
1853 bool "Make CPU Idle calls when idle"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001854 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001855 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1856 On some machines, this can activate improved power savings, such as
1857 a slowed CPU clock rate, when the machine is idle. These idle calls
1858 are made after the idle loop has run for some length of time (e.g.,
1859 333 mS). On some machines, this will cause a hang at boot time or
1860 whenever the CPU becomes idle. (On machines with more than one CPU,
1861 this option does nothing.)
1862
1863config APM_DISPLAY_BLANK
1864 bool "Enable console blanking using APM"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001865 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001866 Enable console blanking using the APM. Some laptops can use this to
1867 turn off the LCD backlight when the screen blanker of the Linux
1868 virtual console blanks the screen. Note that this is only used by
1869 the virtual console screen blanker, and won't turn off the backlight
1870 when using the X Window system. This also doesn't have anything to
1871 do with your VESA-compliant power-saving monitor. Further, this
1872 option doesn't work for all laptops -- it might not turn off your
1873 backlight at all, or it might print a lot of errors to the console,
1874 especially if you are using gpm.
1875
1876config APM_ALLOW_INTS
1877 bool "Allow interrupts during APM BIOS calls"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001878 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001879 Normally we disable external interrupts while we are making calls to
1880 the APM BIOS as a measure to lessen the effects of a badly behaving
1881 BIOS implementation. The BIOS should reenable interrupts if it
1882 needs to. Unfortunately, some BIOSes do not -- especially those in
1883 many of the newer IBM Thinkpads. If you experience hangs when you
1884 suspend, try setting this to Y. Otherwise, say N.
1885
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001886endif # APM
1887
Dave Jonesbb0a56e2011-05-19 18:51:07 -04001888source "drivers/cpufreq/Kconfig"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001889
1890source "drivers/cpuidle/Kconfig"
1891
Andy Henroid27471fd2008-10-09 11:45:22 -07001892source "drivers/idle/Kconfig"
1893
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001894endmenu
1895
1896
1897menu "Bus options (PCI etc.)"
1898
1899config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001900 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001901 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001902 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001903 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001904 Find out whether you have a PCI motherboard. PCI is the name of a
1905 bus system, i.e. the way the CPU talks to the other stuff inside
1906 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1907 VESA. If you have PCI, say Y, otherwise N.
1908
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001909choice
1910 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001911 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001912 default PCI_GOANY
1913 ---help---
1914 On PCI systems, the BIOS can be used to detect the PCI devices and
1915 determine their configuration. However, some old PCI motherboards
1916 have BIOS bugs and may crash if this is done. Also, some embedded
1917 PCI-based systems don't have any BIOS at all. Linux can also try to
1918 detect the PCI hardware directly without using the BIOS.
1919
1920 With this option, you can specify how Linux should detect the
1921 PCI devices. If you choose "BIOS", the BIOS will be used,
1922 if you choose "Direct", the BIOS won't be used, and if you
1923 choose "MMConfig", then PCI Express MMCONFIG will be used.
1924 If you choose "Any", the kernel will try MMCONFIG, then the
1925 direct access method and falls back to the BIOS if that doesn't
1926 work. If unsure, go with the default, which is "Any".
1927
1928config PCI_GOBIOS
1929 bool "BIOS"
1930
1931config PCI_GOMMCONFIG
1932 bool "MMConfig"
1933
1934config PCI_GODIRECT
1935 bool "Direct"
1936
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001937config PCI_GOOLPC
Daniel Drake76fb6572010-09-23 17:28:04 +01001938 bool "OLPC XO-1"
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001939 depends on OLPC
1940
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001941config PCI_GOANY
1942 bool "Any"
1943
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001944endchoice
1945
1946config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001947 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001948 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001949
1950# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1951config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001952 def_bool y
Shaohua Li0aba4962011-05-27 14:59:39 +08001953 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001954
1955config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001956 def_bool y
Feng Tang5f0db7a2009-08-14 15:37:50 -04001957 depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001958
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001959config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001960 def_bool y
1961 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001962
Alex Nixonb5401a92010-03-18 16:31:34 -04001963config PCI_XEN
1964 def_bool y
1965 depends on PCI && XEN
1966 select SWIOTLB_XEN
1967
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001968config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001969 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001970 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001971
1972config PCI_MMCONFIG
1973 bool "Support mmconfig PCI config space access"
1974 depends on X86_64 && PCI && ACPI
1975
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001976config PCI_CNB20LE_QUIRK
David Rientjes6a108a12011-01-20 14:44:16 -08001977 bool "Read CNB20LE Host Bridge Windows" if EXPERT
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001978 default n
1979 depends on PCI && EXPERIMENTAL
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001980 help
1981 Read the PCI windows out of the CNB20LE host bridge. This allows
1982 PCI hotplug to work on systems with the CNB20LE chipset which do
1983 not have ACPI.
1984
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001985 There's no public spec for this chipset, and this functionality
1986 is known to be incomplete.
1987
1988 You should say N unless you know you need this.
1989
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001990source "drivers/pci/pcie/Kconfig"
1991
1992source "drivers/pci/Kconfig"
1993
David Rientjes1c00f012011-03-22 16:34:59 -07001994# x86_64 have no ISA slots, but can have ISA-style DMA.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001995config ISA_DMA_API
David Rientjes1c00f012011-03-22 16:34:59 -07001996 bool "ISA-style DMA support" if (X86_64 && EXPERT)
1997 default y
1998 help
1999 Enables ISA-style DMA support for devices requiring such controllers.
2000 If unsure, say Y.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002001
2002if X86_32
2003
2004config ISA
2005 bool "ISA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002006 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002007 Find out whether you have ISA slots on your motherboard. ISA is the
2008 name of a bus system, i.e. the way the CPU talks to the other stuff
2009 inside your box. Other bus systems are PCI, EISA, MicroChannel
2010 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
2011 newer boards don't support it. If you have ISA, say Y, otherwise N.
2012
2013config EISA
2014 bool "EISA support"
2015 depends on ISA
2016 ---help---
2017 The Extended Industry Standard Architecture (EISA) bus was
2018 developed as an open alternative to the IBM MicroChannel bus.
2019
2020 The EISA bus provided some of the features of the IBM MicroChannel
2021 bus while maintaining backward compatibility with cards made for
2022 the older ISA bus. The EISA bus saw limited use between 1988 and
2023 1995 when it was made obsolete by the PCI bus.
2024
2025 Say Y here if you are building a kernel for an EISA-based machine.
2026
2027 Otherwise, say N.
2028
2029source "drivers/eisa/Kconfig"
2030
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002031config SCx200
2032 tristate "NatSemi SCx200 support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002033 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002034 This provides basic support for National Semiconductor's
2035 (now AMD's) Geode processors. The driver probes for the
2036 PCI-IDs of several on-chip devices, so its a good dependency
2037 for other scx200_* drivers.
2038
2039 If compiled as a module, the driver is named scx200.
2040
2041config SCx200HR_TIMER
2042 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
John Stultz592913e2010-07-13 17:56:20 -07002043 depends on SCx200
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002044 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002045 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002046 This driver provides a clocksource built upon the on-chip
2047 27MHz high-resolution timer. Its also a workaround for
2048 NSC Geode SC-1100's buggy TSC, which loses time when the
2049 processor goes idle (as is done by the scheduler). The
2050 other workaround is idle=poll boot option.
2051
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002052config OLPC
2053 bool "One Laptop Per Child support"
Thomas Gleixner54008972011-02-23 09:50:15 +01002054 depends on !X86_PAE
Andres Salomon3c554942009-12-14 18:00:36 -08002055 select GPIOLIB
Thomas Gleixnerdc3119e72011-02-23 10:08:31 +01002056 select OF
Daniel Drake45bb1672011-03-13 15:10:17 +00002057 select OF_PROMTREE
Grant Likelyb4e51852011-12-16 15:50:17 -07002058 select IRQ_DOMAIN
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002059 ---help---
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002060 Add support for detecting the unique features of the OLPC
2061 XO hardware.
2062
Daniel Drakea3128582011-06-25 17:34:10 +01002063config OLPC_XO1_PM
2064 bool "OLPC XO-1 Power Management"
Daniel Drake97c4cb72011-06-25 17:34:11 +01002065 depends on OLPC && MFD_CS5535 && PM_SLEEP
Daniel Drakea3128582011-06-25 17:34:10 +01002066 select MFD_CORE
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002067 ---help---
Daniel Drake97c4cb72011-06-25 17:34:11 +01002068 Add support for poweroff and suspend of the OLPC XO-1 laptop.
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002069
Daniel Drakecfee9592011-06-25 17:34:17 +01002070config OLPC_XO1_RTC
2071 bool "OLPC XO-1 Real Time Clock"
2072 depends on OLPC_XO1_PM && RTC_DRV_CMOS
2073 ---help---
2074 Add support for the XO-1 real time clock, which can be used as a
2075 programmable wakeup source.
2076
Daniel Drake7feda8e2011-06-25 17:34:12 +01002077config OLPC_XO1_SCI
2078 bool "OLPC XO-1 SCI extras"
Daniel Draked8d01a62011-07-24 18:33:21 +01002079 depends on OLPC && OLPC_XO1_PM
2080 select POWER_SUPPLY
Daniel Drake7feda8e2011-06-25 17:34:12 +01002081 select GPIO_CS5535
2082 select MFD_CORE
2083 ---help---
2084 Add support for SCI-based features of the OLPC XO-1 laptop:
Daniel Drake7bc74b32011-06-25 17:34:14 +01002085 - EC-driven system wakeups
Daniel Drake7feda8e2011-06-25 17:34:12 +01002086 - Power button
Daniel Drake7bc74b32011-06-25 17:34:14 +01002087 - Ebook switch
Daniel Drake2cf2bae2011-06-25 17:34:15 +01002088 - Lid switch
Daniel Drakee1040ac2011-06-25 17:34:16 +01002089 - AC adapter status updates
2090 - Battery status updates
Daniel Drake7feda8e2011-06-25 17:34:12 +01002091
Daniel Drakea0f30f52011-06-25 17:34:18 +01002092config OLPC_XO15_SCI
2093 bool "OLPC XO-1.5 SCI extras"
Daniel Draked8d01a62011-07-24 18:33:21 +01002094 depends on OLPC && ACPI
2095 select POWER_SUPPLY
Daniel Drakea0f30f52011-06-25 17:34:18 +01002096 ---help---
2097 Add support for SCI-based features of the OLPC XO-1.5 laptop:
2098 - EC-driven system wakeups
2099 - AC adapter status updates
2100 - Battery status updates
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002101
Ed Wildgoosed4f3e352011-09-20 14:00:12 -07002102config ALIX
2103 bool "PCEngines ALIX System Support (LED setup)"
2104 select GPIOLIB
2105 ---help---
2106 This option enables system support for the PCEngines ALIX.
2107 At present this just sets up LEDs for GPIO control on
2108 ALIX2/3/6 boards. However, other system specific setup should
2109 get added here.
2110
2111 Note: You must still enable the drivers for GPIO and LED support
2112 (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs
2113
2114 Note: You have to set alix.force=1 for boards with Award BIOS.
2115
Philip Prindevilleda4e3302012-03-05 15:05:15 -08002116config NET5501
2117 bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)"
2118 select GPIOLIB
2119 ---help---
2120 This option enables system support for the Soekris Engineering net5501.
2121
Philip A. Prindeville31970592012-01-14 01:45:39 -07002122config GEOS
2123 bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)"
2124 select GPIOLIB
2125 depends on DMI
2126 ---help---
2127 This option enables system support for the Traverse Technologies GEOS.
2128
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002129endif # X86_32
2130
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +02002131config AMD_NB
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002132 def_bool y
Borislav Petkov0e152cd2010-03-12 15:43:03 +01002133 depends on CPU_SUP_AMD && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002134
2135source "drivers/pcmcia/Kconfig"
2136
2137source "drivers/pci/hotplug/Kconfig"
2138
Alexandre Bounine388b78a2011-03-23 16:43:03 -07002139config RAPIDIO
2140 bool "RapidIO support"
2141 depends on PCI
2142 default n
2143 help
2144 If you say Y here, the kernel will include drivers and
2145 infrastructure code to support RapidIO interconnect devices.
2146
2147source "drivers/rapidio/Kconfig"
2148
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002149endmenu
2150
2151
2152menu "Executable file formats / Emulations"
2153
2154source "fs/Kconfig.binfmt"
2155
2156config IA32_EMULATION
2157 bool "IA32 Emulation"
2158 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01002159 select COMPAT_BINFMT_ELF
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002160 ---help---
H. J. Lu5fd92e62012-02-19 10:40:03 -08002161 Include code to run legacy 32-bit programs under a
2162 64-bit kernel. You should likely turn this on, unless you're
2163 100% sure that you don't have any 32-bit programs left.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002164
2165config IA32_AOUT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002166 tristate "IA32 a.out support"
2167 depends on IA32_EMULATION
2168 ---help---
2169 Support old a.out binaries in the 32bit emulation.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002170
H. Peter Anvin0bf62762012-02-27 14:09:10 -08002171config X86_X32
H. J. Lu5fd92e62012-02-19 10:40:03 -08002172 bool "x32 ABI for 64-bit mode (EXPERIMENTAL)"
2173 depends on X86_64 && IA32_EMULATION && EXPERIMENTAL
2174 ---help---
2175 Include code to run binaries for the x32 native 32-bit ABI
2176 for 64-bit processors. An x32 process gets access to the
2177 full 64-bit register file and wide data path while leaving
2178 pointers at 32 bits for smaller memory footprint.
2179
2180 You will need a recent binutils (2.22 or later) with
2181 elf32_x86_64 support enabled to compile a kernel with this
2182 option set.
2183
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002184config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002185 def_bool y
H. Peter Anvin0bf62762012-02-27 14:09:10 -08002186 depends on IA32_EMULATION || X86_X32
Chris Metcalf48b25c42012-03-15 13:13:38 -04002187 select ARCH_WANT_OLD_COMPAT_IPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002188
2189config COMPAT_FOR_U64_ALIGNMENT
2190 def_bool COMPAT
2191 depends on X86_64
2192
2193config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002194 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04002195 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002196
David Howellsee009e4a02011-03-07 15:06:20 +00002197config KEYS_COMPAT
2198 bool
2199 depends on COMPAT && KEYS
2200 default y
2201
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002202endmenu
2203
2204
Keith Packarde5beae12008-11-03 18:21:45 +01002205config HAVE_ATOMIC_IOMAP
2206 def_bool y
2207 depends on X86_32
2208
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +09002209config HAVE_TEXT_POKE_SMP
2210 bool
2211 select STOP_MACHINE if SMP
2212
Alessandro Rubini4692d772012-04-04 19:39:58 +02002213config X86_DEV_DMA_OPS
2214 bool
Alessandro Rubini83125a32012-04-04 19:40:21 +02002215 depends on X86_64 || STA2X11
Alessandro Rubini4692d772012-04-04 19:39:58 +02002216
Alessandro Rubinif7219a52012-04-04 19:40:10 +02002217config X86_DMA_REMAP
2218 bool
Alessandro Rubini83125a32012-04-04 19:40:21 +02002219 depends on STA2X11
Alessandro Rubinif7219a52012-04-04 19:40:10 +02002220
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002221source "net/Kconfig"
2222
2223source "drivers/Kconfig"
2224
2225source "drivers/firmware/Kconfig"
2226
2227source "fs/Kconfig"
2228
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002229source "arch/x86/Kconfig.debug"
2230
2231source "security/Kconfig"
2232
2233source "crypto/Kconfig"
2234
Avi Kivityedf88412007-12-16 11:02:48 +02002235source "arch/x86/kvm/Kconfig"
2236
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002237source "lib/Kconfig"