blob: 59717fd17bc738720860e0b3f9d67ad3af211441 [file] [log] [blame]
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +01001# Select 32 or 64 bit
2config 64BIT
Sam Ravnborg68409992007-11-17 15:37:31 +01003 bool "64-bit kernel" if ARCH = "x86"
4 default ARCH = "x86_64"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01005 ---help---
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +01006 Say yes to build a 64-bit kernel - formerly known as x86_64
7 Say no to build a 32-bit kernel - formerly known as i386
8
9config X86_32
10 def_bool !64BIT
Russell King82491452011-05-08 18:55:19 +010011 select CLKSRC_I8253
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +010012
13config X86_64
14 def_bool 64BIT
Sam Ravnborg1032c0b2007-11-06 21:35:08 +010015
16### Arch settings
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010017config X86
Harvey Harrison3c2362e2008-01-30 13:31:03 +010018 def_bool y
David Woodhousee17c6d52008-06-17 12:19:34 +010019 select HAVE_AOUT if X86_32
Ingo Molnara5574cf2008-05-05 23:19:50 +020020 select HAVE_UNSTABLE_SCHED_CLOCK
Sam Ravnborgec7748b2008-02-09 10:46:40 +010021 select HAVE_IDE
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -050022 select HAVE_OPROFILE
Ralf Baechle8761f1a2011-06-01 19:05:09 +010023 select HAVE_PCSPKR_PLATFORM
Peter Zijlstracc2067a2010-11-16 21:49:01 +010024 select HAVE_PERF_EVENTS
Peter Zijlstrae360adb2010-10-14 14:01:34 +080025 select HAVE_IRQ_WORK
Rik van Riel28b2ee22008-07-23 21:27:05 -070026 select HAVE_IOREMAP_PROT
Mathieu Desnoyers3f550092008-02-02 15:10:35 -050027 select HAVE_KPROBES
Yinghai Lu72d7c3b2010-08-25 13:39:17 -070028 select HAVE_MEMBLOCK
Tejun Heo0608f702011-07-14 11:44:23 +020029 select HAVE_MEMBLOCK_NODE_MAP
Tejun Heoc378ddd2011-07-14 11:46:03 +020030 select ARCH_DISCARD_MEMBLOCK
Ingo Molnar1f972762008-07-26 13:52:50 +020031 select ARCH_WANT_OPTIONAL_GPIOLIB
Ingo Molnarda4276b2009-01-07 11:05:10 +010032 select ARCH_WANT_FRAME_POINTERS
FUJITA Tomonori7c095e42009-06-17 16:28:12 -070033 select HAVE_DMA_ATTRS
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080034 select HAVE_KRETPROBES
Masami Hiramatsuc0f7ac32010-02-25 08:34:46 -050035 select HAVE_OPTPROBES
Steven Rostedte4b2b882008-08-14 15:45:11 -040036 select HAVE_FTRACE_MCOUNT_RECORD
Steven Rostedtcf4db252010-10-14 23:32:44 -040037 select HAVE_C_RECORDMCOUNT
Steven Rostedt677aa9f2008-05-17 00:01:36 -040038 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -040039 select HAVE_FUNCTION_TRACER
Frederic Weisbecker48d68b22008-12-02 00:20:39 +010040 select HAVE_FUNCTION_GRAPH_TRACER
Steven Rostedt71e308a2009-06-18 12:45:08 -040041 select HAVE_FUNCTION_GRAPH_FP_TEST
Steven Rostedt60a7ecf2008-11-05 16:05:44 -050042 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
Steven Rostedt9a5fd902009-02-06 01:14:26 -050043 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
Josh Stone66700002009-08-24 14:43:11 -070044 select HAVE_SYSCALL_TRACEPOINTS
Ingo Molnare0ec9482009-01-27 17:01:14 +010045 select HAVE_KVM
Ingo Molnar49793b02009-01-27 17:02:29 +010046 select HAVE_ARCH_KGDB
Roland McGrath99bbc4b2008-04-20 14:35:12 -070047 select HAVE_ARCH_TRACEHOOK
Dmitry Baryshkov323ec002008-06-29 14:19:31 +040048 select HAVE_GENERIC_DMA_COHERENT if X86_32
Johannes Berg58340a02008-07-25 01:45:33 -070049 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Török Edwin8d264872008-11-23 12:39:08 +020050 select USER_STACKTRACE_SUPPORT
Heiko Carstensf850c30c2010-02-10 17:25:17 +010051 select HAVE_REGS_AND_STACK_ACCESS_API
Joerg Roedel2118d0c2009-01-09 15:13:15 +010052 select HAVE_DMA_API_DEBUG
H. Peter Anvin2e9f3bd2009-01-04 15:41:25 -080053 select HAVE_KERNEL_GZIP
54 select HAVE_KERNEL_BZIP2
55 select HAVE_KERNEL_LZMA
Lasse Collin30314802011-01-12 17:01:24 -080056 select HAVE_KERNEL_XZ
Albin Tonnerre13510992010-01-08 14:42:45 -080057 select HAVE_KERNEL_LZO
K.Prasad0067f122009-06-01 23:43:57 +053058 select HAVE_HW_BREAKPOINT
Frederic Weisbecker01027522010-04-11 18:55:56 +020059 select HAVE_MIXED_BREAKPOINTS_REGS
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010060 select PERF_EVENTS
Frederic Weisbeckerc01d4322010-05-15 22:57:48 +020061 select HAVE_PERF_EVENTS_NMI
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010062 select ANON_INODES
Heiko Carstens43570fd2012-01-12 17:17:27 -080063 select HAVE_ALIGNED_STRUCT_PAGE if SLUB && !M386
Heiko Carstens41561532012-01-12 17:17:30 -080064 select HAVE_CMPXCHG_LOCAL if !M386
Pekka Enberg0a4af3b2009-02-26 21:38:56 +020065 select HAVE_ARCH_KMEMCHECK
Avi Kivity7c68af62009-09-19 09:40:22 +030066 select HAVE_USER_RETURN_NOTIFIER
David Daneye39f5602012-01-10 15:10:21 -080067 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
Steven Rostedt46eb3b62010-09-22 23:10:23 -040068 select HAVE_ARCH_JUMP_LABEL
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +090069 select HAVE_TEXT_POKE_SMP
Thomas Gleixner3bb98082010-09-27 12:46:02 +000070 select HAVE_GENERIC_HARDIRQS
71 select HAVE_SPARSE_IRQ
Yinghai Lu141d55e2011-10-12 11:53:17 -070072 select SPARSE_IRQ
Jan Beulichc49aa5b2011-03-08 09:24:26 +000073 select GENERIC_FIND_FIRST_BIT
Thomas Gleixner3bb98082010-09-27 12:46:02 +000074 select GENERIC_IRQ_PROBE
75 select GENERIC_PENDING_IRQ if SMP
Thomas Gleixner517e4982010-12-16 17:59:57 +010076 select GENERIC_IRQ_SHOW
Martin Schwidefskyd1748302011-08-23 15:29:42 +020077 select GENERIC_CLOCKEVENTS_MIN_ADJUST
Thomas Gleixnerc01858082011-02-07 02:24:08 +010078 select IRQ_FORCED_THREADING
Amerigo Wang351f8f82011-01-12 16:59:39 -080079 select USE_GENERIC_SMP_HELPERS if SMP
Randy Dunlap9cddf152011-05-04 11:06:05 -070080 select HAVE_BPF_JIT if (X86_64 && NET)
Thomas Gleixner0a779c52011-06-09 13:08:26 +000081 select CLKEVT_I8253
Huang Yingdf013ff2011-07-13 13:14:22 +080082 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Michael S. Tsirkin4673ca82011-11-24 14:54:28 +020083 select GENERIC_IOMAP
Balbir Singh7d8330a2008-02-10 12:46:28 +053084
Ingo Molnarba7e4d12009-06-06 13:58:12 +020085config INSTRUCTION_DECODER
86 def_bool (KPROBES || PERF_EVENTS)
87
Linus Torvalds51b26ad2009-04-26 10:12:47 -070088config OUTPUT_FORMAT
89 string
90 default "elf32-i386" if X86_32
91 default "elf64-x86-64" if X86_64
92
Sam Ravnborg73531902008-05-25 23:03:18 +020093config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020094 string
Sam Ravnborg73531902008-05-25 23:03:18 +020095 default "arch/x86/configs/i386_defconfig" if X86_32
96 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020097
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010098config GENERIC_CMOS_UPDATE
Harvey Harrison3c2362e2008-01-30 13:31:03 +010099 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100100
101config CLOCKSOURCE_WATCHDOG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100102 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100103
104config GENERIC_CLOCKEVENTS
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100105 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100106
H. Peter Anvinae7bd112011-07-21 13:34:05 -0700107config ARCH_CLOCKSOURCE_DATA
108 def_bool y
109 depends on X86_64
110
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100111config GENERIC_CLOCKEVENTS_BROADCAST
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100112 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100113 depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
114
115config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100116 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100117
118config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100119 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100120
Heiko Carstensaa7d9352008-02-01 17:45:14 +0100121config HAVE_LATENCYTOP_SUPPORT
122 def_bool y
123
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100124config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100125 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100126
127config ZONE_DMA
David Rientjesdc382fd2011-05-16 13:54:10 -0700128 bool "DMA memory allocation support" if EXPERT
129 default y
130 help
131 DMA memory allocation support allows devices with less than 32-bit
132 addressing to allocate within the first 16MB of address space.
133 Disable if no such devices will be used.
134
135 If unsure, say Y.
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100136
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100137config SBUS
138 bool
139
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800140config NEED_DMA_MAP_STATE
Suresh Siddhad3f13812011-08-23 17:05:25 -0700141 def_bool (X86_64 || INTEL_IOMMU || DMA_API_DEBUG)
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800142
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700143config NEED_SG_DMA_LENGTH
Andrew Morton4a14d842010-05-26 14:44:33 -0700144 def_bool y
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700145
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100146config GENERIC_ISA_DMA
David Rientjes1c00f012011-03-22 16:34:59 -0700147 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100148
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100149config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100150 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100151 depends on BUG
Jan Beulichb93a5312008-12-16 11:40:27 +0000152 select GENERIC_BUG_RELATIVE_POINTERS if X86_64
153
154config GENERIC_BUG_RELATIVE_POINTERS
155 bool
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100156
157config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100158 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100159
Florian Fainellia6082952008-01-30 13:33:35 +0100160config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -0700161 bool
Florian Fainellia6082952008-01-30 13:33:35 +0100162
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100163config ARCH_MAY_HAVE_PC_FDC
David Rientjes8df3bd92011-03-22 16:34:58 -0700164 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100165
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100166config RWSEM_GENERIC_SPINLOCK
167 def_bool !X86_XADD
168
169config RWSEM_XCHGADD_ALGORITHM
170 def_bool X86_XADD
171
Venki Pallipadia6869cc2008-02-08 17:05:44 -0800172config ARCH_HAS_CPU_IDLE_WAIT
173 def_bool y
174
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100175config GENERIC_CALIBRATE_DELAY
176 def_bool y
177
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100178config GENERIC_TIME_VSYSCALL
179 bool
180 default X86_64
181
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800182config ARCH_HAS_CPU_RELAX
183 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100184
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400185config ARCH_HAS_DEFAULT_IDLE
186 def_bool y
187
Pekka Enberg1b27d052008-04-28 02:12:22 -0700188config ARCH_HAS_CACHE_LINE_SIZE
189 def_bool y
190
Mike Travisdd5af902008-01-30 13:33:32 +0100191config HAVE_SETUP_PER_CPU_AREA
Brian Gerst89c9c4c2009-01-27 12:56:48 +0900192 def_bool y
travis@sgi.comb32ef632008-01-30 13:32:51 +0100193
Tejun Heo08fc4582009-08-14 15:00:49 +0900194config NEED_PER_CPU_EMBED_FIRST_CHUNK
195 def_bool y
196
197config NEED_PER_CPU_PAGE_FIRST_CHUNK
Tejun Heo11124412009-02-20 16:29:09 +0900198 def_bool y
199
Johannes Berg801e4062007-12-08 02:12:39 +0100200config ARCH_HIBERNATION_POSSIBLE
201 def_bool y
Johannes Berg801e4062007-12-08 02:12:39 +0100202
Johannes Bergf4cb5702007-12-08 02:14:00 +0100203config ARCH_SUSPEND_POSSIBLE
204 def_bool y
Johannes Bergf4cb5702007-12-08 02:14:00 +0100205
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100206config ZONE_DMA32
207 bool
208 default X86_64
209
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100210config AUDIT_ARCH
211 bool
212 default X86_64
213
Ingo Molnar765c68b2008-04-09 11:03:37 +0200214config ARCH_SUPPORTS_OPTIMIZED_INLINING
215 def_bool y
216
Akinobu Mita6a11f752009-03-31 15:23:17 -0700217config ARCH_SUPPORTS_DEBUG_PAGEALLOC
218 def_bool y
219
Shane Wang69575d32009-09-01 18:25:07 -0700220config HAVE_INTEL_TXT
221 def_bool y
Suresh Siddhad3f13812011-08-23 17:05:25 -0700222 depends on EXPERIMENTAL && INTEL_IOMMU && ACPI
Shane Wang69575d32009-09-01 18:25:07 -0700223
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100224config X86_32_SMP
225 def_bool y
226 depends on X86_32 && SMP
227
228config X86_64_SMP
229 def_bool y
230 depends on X86_64 && SMP
231
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100232config X86_HT
Jan Beulich6fc108a2010-04-21 15:23:44 +0100233 def_bool y
Adrian Bunkee0011a2007-12-04 17:19:07 +0100234 depends on SMP
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100235
Tejun Heoccbeed32009-02-09 22:17:40 +0900236config X86_32_LAZY_GS
237 def_bool y
Tejun Heo60a53172009-02-09 22:17:40 +0900238 depends on X86_32 && !CC_STACKPROTECTOR
Tejun Heoccbeed32009-02-09 22:17:40 +0900239
Borislav Petkovd61931d2010-03-05 17:34:46 +0100240config ARCH_HWEIGHT_CFLAGS
241 string
242 default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
243 default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64
244
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100245config KTIME_SCALAR
246 def_bool X86_32
Borislav Petkovd7c53c92010-08-19 20:10:29 +0200247
248config ARCH_CPU_PROBE_RELEASE
249 def_bool y
250 depends on HOTPLUG_CPU
251
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100252source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700253source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100254
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100255menu "Processor type and features"
256
257source "kernel/time/Kconfig"
258
259config SMP
260 bool "Symmetric multi-processing support"
261 ---help---
262 This enables support for systems with more than one CPU. If you have
263 a system with only one CPU, like most personal computers, say N. If
264 you have a system with more than one CPU, say Y.
265
266 If you say N here, the kernel will run on single and multiprocessor
267 machines, but will use only one CPU of a multiprocessor machine. If
268 you say Y here, the kernel will run on many, but not all,
269 singleprocessor machines. On a singleprocessor machine, the kernel
270 will run faster if you say N here.
271
272 Note that if you say Y here and choose architecture "586" or
273 "Pentium" under "Processor family", the kernel will not work on 486
274 architectures. Similarly, multiprocessor kernels for the "PPro"
275 architecture may not work on all Pentium based boards.
276
277 People using multiprocessor machines who say Y here should also say
278 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
279 Management" code will be disabled if you say Y here.
280
Paul Bolle395cf962011-08-15 02:02:26 +0200281 See also <file:Documentation/x86/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100282 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
283 <http://www.tldp.org/docs.html#howto>.
284
285 If you don't know what to do here, say N.
286
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800287config X86_X2APIC
288 bool "Support x2apic"
Suresh Siddhad3f13812011-08-23 17:05:25 -0700289 depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800290 ---help---
291 This enables x2apic support on CPUs that have this feature.
292
293 This allows 32-bit apic IDs (so it can support very large systems),
294 and accesses the local apic via MSRs not via mmio.
295
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800296 If you don't know what to do here, say N.
297
Yinghai Lu6695c852008-06-19 12:13:09 -0700298config X86_MPPARSE
Jan Beulich7a527682008-10-30 10:38:24 +0000299 bool "Enable MPS table" if ACPI
300 default y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200301 depends on X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100302 ---help---
Yinghai Lu6695c852008-06-19 12:13:09 -0700303 For old smp systems that do not have proper acpi support. Newer systems
304 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
Yinghai Lu6695c852008-06-19 12:13:09 -0700305
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800306config X86_BIGSMP
307 bool "Support for big SMP systems with more than 8 CPUs"
308 depends on X86_32 && SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100309 ---help---
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800310 This option is needed for the systems that have more than 8 CPUs
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100311
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800312if X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800313config X86_EXTENDED_PLATFORM
314 bool "Support for extended (non-PC) x86 platforms"
315 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100316 ---help---
Ingo Molnar06ac8342009-01-27 18:11:43 +0100317 If you disable this option then the kernel will only support
318 standard PC platforms. (which covers the vast majority of
319 systems out there.)
320
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800321 If you enable this option then you'll be able to select support
322 for the following (non-PC) 32 bit x86 platforms:
323 AMD Elan
324 NUMAQ (IBM/Sequent)
325 RDC R-321x SoC
326 SGI 320/540 (Visual Workstation)
327 Summit/EXA (IBM x440)
328 Unisys ES7000 IA32 series
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200329 Moorestown MID devices
Ingo Molnar06ac8342009-01-27 18:11:43 +0100330
331 If you have one of these systems, or if you want to build a
332 generic distribution kernel, say Y here - otherwise say N.
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800333endif
Ingo Molnar06ac8342009-01-27 18:11:43 +0100334
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800335if X86_64
336config X86_EXTENDED_PLATFORM
337 bool "Support for extended (non-PC) x86 platforms"
338 default y
339 ---help---
340 If you disable this option then the kernel will only support
341 standard PC platforms. (which covers the vast majority of
342 systems out there.)
343
344 If you enable this option then you'll be able to select support
345 for the following (non-PC) 64 bit x86 platforms:
Steffen Persvold44b111b52011-12-06 00:07:26 +0800346 Numascale NumaChip
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800347 ScaleMP vSMP
348 SGI Ultraviolet
349
350 If you have one of these systems, or if you want to build a
351 generic distribution kernel, say Y here - otherwise say N.
352endif
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800353# This is an alphabetically sorted list of 64 bit extended platforms
354# Please maintain the alphabetic order if and when there are additions
Steffen Persvold44b111b52011-12-06 00:07:26 +0800355config X86_NUMACHIP
356 bool "Numascale NumaChip"
357 depends on X86_64
358 depends on X86_EXTENDED_PLATFORM
359 depends on NUMA
360 depends on SMP
361 depends on X86_X2APIC
362 depends on !EDAC_AMD64
363 ---help---
364 Adds support for Numascale NumaChip large-SMP systems. Needed to
365 enable more than ~168 cores.
366 If you don't have one of these, you should say N here.
Nick Piggin03b48632009-01-20 04:36:04 +0100367
Ingo Molnar6a485652009-01-27 18:29:13 +0100368config X86_VSMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800369 bool "ScaleMP vSMP"
Randy Dunlap03f1a172010-10-13 21:00:23 -0700370 select PARAVIRT_GUEST
Ingo Molnar6a485652009-01-27 18:29:13 +0100371 select PARAVIRT
372 depends on X86_64 && PCI
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800373 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100374 ---help---
Ingo Molnar6a485652009-01-27 18:29:13 +0100375 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
376 supposed to run on these EM64T-based machines. Only choose this option
377 if you have one of these machines.
378
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800379config X86_UV
380 bool "SGI Ultraviolet"
381 depends on X86_64
382 depends on X86_EXTENDED_PLATFORM
Jack Steiner54c28d22009-04-03 15:39:42 -0500383 depends on NUMA
Suresh Siddha9d6c26e2009-04-20 13:02:31 -0700384 depends on X86_X2APIC
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800385 ---help---
386 This option is needed in order to support SGI Ultraviolet systems.
387 If you don't have one of these, you should say N here.
388
389# Following is an alphabetically sorted list of 32 bit extended platforms
390# Please maintain the alphabetic order if and when there are additions
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100391
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800392config X86_INTEL_CE
393 bool "CE4100 TV platform"
394 depends on PCI
395 depends on PCI_GODIRECT
396 depends on X86_32
397 depends on X86_EXTENDED_PLATFORM
Dirk Brandewie37bc9f52010-11-09 12:08:08 -0800398 select X86_REBOOTFIXUPS
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +0100399 select OF
400 select OF_EARLY_FLATTREE
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800401 ---help---
402 Select for the Intel CE media processor (CE4100) SOC.
403 This option compiles in support for the CE4100 SOC for settop
404 boxes and media devices.
405
Alan Coxdd137522011-12-05 23:14:39 +0000406config X86_WANT_INTEL_MID
Alan Cox43605ef2011-07-12 17:49:29 +0100407 bool "Intel MID platform support"
408 depends on X86_32
409 depends on X86_EXTENDED_PLATFORM
410 ---help---
411 Select to build a kernel capable of supporting Intel MID platform
412 systems which do not have the PCI legacy interfaces (Moorestown,
413 Medfield). If you are building for a PC class system say N here.
414
Alan Coxdd137522011-12-05 23:14:39 +0000415if X86_WANT_INTEL_MID
Alan Cox43605ef2011-07-12 17:49:29 +0100416
Alan Cox4e2b1c42011-12-06 13:28:22 +0000417config X86_INTEL_MID
418 bool
419
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200420config X86_MRST
421 bool "Moorestown MID platform"
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800422 depends on PCI
423 depends on PCI_GOANY
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800424 depends on X86_IO_APIC
Alan Cox7c9c3a12011-12-29 14:43:16 +0000425 select X86_INTEL_MID
426 select SFI
427 select DW_APB_TIMER
Jacob Panbb24c472009-09-02 07:37:17 -0700428 select APB_TIMER
Feng Tang1da4b1c2010-11-09 11:22:58 +0000429 select I2C
430 select SPI
Alan Coxb9fc71f2010-11-15 17:31:19 +0000431 select INTEL_SCU_IPC
Randy Dunlapad025192010-11-15 10:14:06 -0800432 select X86_PLATFORM_DEVICES
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200433 ---help---
434 Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
435 Internet Device(MID) platform. Moorestown consists of two chips:
436 Lincroft (CPU core, graphics, and memory controller) and Langwell IOH.
437 Unlike standard x86 PCs, Moorestown does not have many legacy devices
438 nor standard legacy replacement devices/features. e.g. Moorestown does
439 not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
440
Alan Cox1ea7c672011-11-10 13:29:14 +0000441config X86_MDFLD
442 bool "Medfield MID platform"
443 depends on PCI
444 depends on PCI_GOANY
445 depends on X86_IO_APIC
Alan Cox7c9c3a12011-12-29 14:43:16 +0000446 select X86_INTEL_MID
447 select SFI
448 select DW_APB_TIMER
Alan Cox1ea7c672011-11-10 13:29:14 +0000449 select APB_TIMER
450 select I2C
451 select SPI
452 select INTEL_SCU_IPC
453 select X86_PLATFORM_DEVICES
454 ---help---
455 Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin
456 Internet Device(MID) platform.
457 Unlike standard x86 PCs, Medfield does not have many legacy devices
458 nor standard legacy replacement devices/features. e.g. Medfield does
459 not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
460
Alan Cox43605ef2011-07-12 17:49:29 +0100461endif
462
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800463config X86_RDC321X
464 bool "RDC R-321x SoC"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100465 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800466 depends on X86_EXTENDED_PLATFORM
467 select M486
468 select X86_REBOOTFIXUPS
469 ---help---
470 This option is needed for RDC R-321x system-on-chip, also known
471 as R-8610-(G).
472 If you don't have one of these chips, you should say N here.
473
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100474config X86_32_NON_STANDARD
Ingo Molnar9c398012009-01-27 18:24:57 +0100475 bool "Support non-standard 32-bit SMP architectures"
476 depends on X86_32 && SMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800477 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100478 ---help---
479 This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
Yinghai Lud49c4282008-06-08 18:31:54 -0700480 subarchitectures. It is intended for a generic binary kernel.
481 if you select them all, kernel will probe it one by one. and will
482 fallback to default.
483
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800484# Alphabetically sorted list of Non standard 32 bit platforms
Yinghai Lud49c4282008-06-08 18:31:54 -0700485
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100486config X86_NUMAQ
487 bool "NUMAQ (IBM/Sequent)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100488 depends on X86_32_NON_STANDARD
Pan, Jacob juna92d1522010-02-24 16:59:55 -0800489 depends on PCI
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100490 select NUMA
Ingo Molnar9c398012009-01-27 18:24:57 +0100491 select X86_MPPARSE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100492 ---help---
Yinghai Lud49c4282008-06-08 18:31:54 -0700493 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
494 NUMA multiquad box. This changes the way that processors are
495 bootstrapped, and uses Clustered Logical APIC addressing mode instead
496 of Flat Logical. You will need a new lynxer.elf file to flash your
497 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100498
Linus Torvaldsd949f362009-09-26 09:35:07 -0700499config X86_SUPPORTS_MEMORY_FAILURE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100500 def_bool y
Linus Torvaldsd949f362009-09-26 09:35:07 -0700501 # MCE code calls memory_failure():
502 depends on X86_MCE
503 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
504 depends on !X86_NUMAQ
505 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
506 depends on X86_64 || !SPARSEMEM
507 select ARCH_SUPPORTS_MEMORY_FAILURE
Linus Torvaldsd949f362009-09-26 09:35:07 -0700508
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200509config X86_VISWS
510 bool "SGI 320/540 (Visual Workstation)"
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800511 depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
512 depends on X86_32_NON_STANDARD
513 ---help---
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200514 The SGI Visual Workstation series is an IA32-based workstation
515 based on SGI systems chips with some legacy PC hardware attached.
516
517 Say Y here to create a kernel to run on the SGI 320 or 540.
518
519 A kernel compiled for the Visual Workstation will run on general
520 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
521
Ingo Molnar9c398012009-01-27 18:24:57 +0100522config X86_SUMMIT
523 bool "Summit/EXA (IBM x440)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100524 depends on X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100525 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100526 This option is needed for IBM systems that use the Summit/EXA chipset.
527 In particular, it is needed for the x440.
Ingo Molnar1f972762008-07-26 13:52:50 +0200528
Ingo Molnar9c398012009-01-27 18:24:57 +0100529config X86_ES7000
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800530 bool "Unisys ES7000 IA32 series"
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800531 depends on X86_32_NON_STANDARD && X86_BIGSMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100532 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100533 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
534 supposed to run on an IA32-based Unisys ES7000 system.
535
Shérab82148d12010-09-25 06:06:57 +0200536config X86_32_IRIS
537 tristate "Eurobraille/Iris poweroff module"
538 depends on X86_32
539 ---help---
540 The Iris machines from EuroBraille do not have APM or ACPI support
541 to shut themselves down properly. A special I/O sequence is
542 needed to do so, which is what this module does at
543 kernel shutdown.
544
545 This is only for Iris machines from EuroBraille.
546
547 If unused, say N.
548
Ingo Molnarae1e9132008-11-11 09:05:16 +0100549config SCHED_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100550 def_bool y
551 prompt "Single-depth WCHAN output"
Ken Chena87d0912008-11-06 11:10:49 -0800552 depends on X86
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100553 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100554 Calculate simpler /proc/<PID>/wchan values. If this option
555 is disabled then wchan values will recurse back to the
556 caller function. This provides more accurate wchan values,
557 at the expense of slightly more scheduling overhead.
558
559 If in doubt, say "Y".
560
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100561menuconfig PARAVIRT_GUEST
562 bool "Paravirtualized guest support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100563 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100564 Say Y here to get to see options related to running Linux under
565 various hypervisors. This option alone does not add any kernel code.
566
567 If you say N, all options in this submenu will be skipped and disabled.
568
569if PARAVIRT_GUEST
570
Glauber Costa095c0aa2011-07-11 15:28:18 -0400571config PARAVIRT_TIME_ACCOUNTING
572 bool "Paravirtual steal time accounting"
573 select PARAVIRT
574 default n
575 ---help---
576 Select this option to enable fine granularity task steal time
577 accounting. Time spent executing other tasks in parallel with
578 the current vCPU is discounted from the vCPU power. To account for
579 that, there can be a small performance impact.
580
581 If in doubt, say N here.
582
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100583source "arch/x86/xen/Kconfig"
584
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200585config KVM_CLOCK
586 bool "KVM paravirtualized clock"
587 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200588 select PARAVIRT_CLOCK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100589 ---help---
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200590 Turning on this option will allow you to run a paravirtualized clock
591 when running over the KVM hypervisor. Instead of relying on a PIT
592 (or probably other) emulation by the underlying device model, the host
593 provides the guest with timing infrastructure such as time of day, and
594 system time
595
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500596config KVM_GUEST
597 bool "KVM Guest support"
598 select PARAVIRT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100599 ---help---
600 This option enables various optimizations for running under the KVM
601 hypervisor.
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500602
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100603source "arch/x86/lguest/Kconfig"
604
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100605config PARAVIRT
606 bool "Enable paravirtualization code"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100607 ---help---
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100608 This changes the kernel so it can modify itself when it is run
609 under a hypervisor, potentially improving performance significantly
610 over full virtualization. However, when run without a hypervisor
611 the kernel is theoretically slower and slightly larger.
612
Jeremy Fitzhardingeb4ecc122009-05-13 17:16:55 -0700613config PARAVIRT_SPINLOCKS
614 bool "Paravirtualization layer for spinlocks"
615 depends on PARAVIRT && SMP && EXPERIMENTAL
616 ---help---
617 Paravirtualized spinlocks allow a pvops backend to replace the
618 spinlock implementation with something virtualization-friendly
619 (for example, block the virtual CPU rather than spinning).
620
621 Unfortunately the downside is an up to 5% performance hit on
622 native kernels, with various workloads.
623
624 If you are unsure how to answer this question, answer N.
625
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200626config PARAVIRT_CLOCK
627 bool
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200628
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100629endif
630
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400631config PARAVIRT_DEBUG
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100632 bool "paravirt-ops debugging"
633 depends on PARAVIRT && DEBUG_KERNEL
634 ---help---
635 Enable to debug paravirt_ops internals. Specifically, BUG if
636 a paravirt_op is missing when it is called.
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400637
Yinghai Lu08677212010-02-10 01:20:20 -0800638config NO_BOOTMEM
Yinghai Lu774ea0b2010-08-25 13:39:18 -0700639 def_bool y
Yinghai Lu08677212010-02-10 01:20:20 -0800640
Yinghai Lu03273182008-04-18 17:49:15 -0700641config MEMTEST
642 bool "Memtest"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100643 ---help---
Yinghai Luc64df702008-03-21 18:56:19 -0700644 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700645 to be set.
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100646 memtest=0, mean disabled; -- default
647 memtest=1, mean do 1 test pattern;
648 ...
649 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200650 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100651
652config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100653 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100654 depends on X86_32 && NUMA && X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100655
656config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100657 def_bool y
Alessandro Rubinif9b15df2011-10-29 00:48:42 +0200658 depends on X86_SUMMIT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100659
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100660source "arch/x86/Kconfig.cpu"
661
662config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100663 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100664 prompt "HPET Timer Support" if X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100665 ---help---
666 Use the IA-PC HPET (High Precision Event Timer) to manage
667 time in preference to the PIT and RTC, if a HPET is
668 present.
669 HPET is the next generation timer replacing legacy 8254s.
670 The HPET provides a stable time base on SMP
671 systems, unlike the TSC, but it is more expensive to access,
672 as it is off-chip. You can find the HPET spec at
673 <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100674
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100675 You can safely choose Y here. However, HPET will only be
676 activated if the platform and the BIOS support this feature.
677 Otherwise the 8254 will be used for timing services.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100678
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100679 Choose N to continue using the legacy 8254 timer.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100680
681config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100682 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800683 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100684
Jacob Panbb24c472009-09-02 07:37:17 -0700685config APB_TIMER
Alan Cox933b9462011-12-17 17:43:40 +0000686 def_bool y if X86_INTEL_MID
687 prompt "Intel MID APB Timer Support" if X86_INTEL_MID
Jamie Iles06c3df42011-06-06 12:43:07 +0100688 select DW_APB_TIMER
Alan Coxa0c38322011-12-17 21:57:25 +0000689 depends on X86_INTEL_MID && SFI
Jacob Panbb24c472009-09-02 07:37:17 -0700690 help
691 APB timer is the replacement for 8254, HPET on X86 MID platforms.
692 The APBT provides a stable time base on SMP
693 systems, unlike the TSC, but it is more expensive to access,
694 as it is off-chip. APB timers are always running regardless of CPU
695 C states, they are used as per CPU clockevent device when possible.
696
David Rientjes6a108a12011-01-20 14:44:16 -0800697# Mark as expert because too many people got it wrong.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100698# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700699config DMI
700 default y
David Rientjes6a108a12011-01-20 14:44:16 -0800701 bool "Enable DMI scanning" if EXPERT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100702 ---help---
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700703 Enabled scanning of DMI to identify machine quirks. Say Y
704 here unless you have verified that your setup is not
705 affected by entries in the DMI blacklist. Required by PNP
706 BIOS code.
707
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100708config GART_IOMMU
David Rientjes6a108a12011-01-20 14:44:16 -0800709 bool "GART IOMMU support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100710 default y
711 select SWIOTLB
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +0200712 depends on X86_64 && PCI && AMD_NB
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100713 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100714 Support for full DMA access of devices with 32bit memory access only
715 on systems with more than 3GB. This is usually needed for USB,
716 sound, many IDE/SATA chipsets and some other devices.
717 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
718 based hardware IOMMU and a software bounce buffer based IOMMU used
719 on Intel systems and as fallback.
720 The code is only active when needed (enough memory and limited
721 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
722 too.
723
724config CALGARY_IOMMU
725 bool "IBM Calgary IOMMU support"
726 select SWIOTLB
727 depends on X86_64 && PCI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100728 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100729 Support for hardware IOMMUs in IBM's xSeries x366 and x460
730 systems. Needed to run systems with more than 3GB of memory
731 properly with 32-bit PCI devices that do not support DAC
732 (Double Address Cycle). Calgary also supports bus level
733 isolation, where all DMAs pass through the IOMMU. This
734 prevents them from going anywhere except their intended
735 destination. This catches hard-to-find kernel bugs and
736 mis-behaving drivers and devices that do not use the DMA-API
737 properly to set up their DMA buffers. The IOMMU can be
738 turned off at boot time with the iommu=off parameter.
739 Normally the kernel will make the right choice by itself.
740 If unsure, say Y.
741
742config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100743 def_bool y
744 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100745 depends on CALGARY_IOMMU
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100746 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100747 Should Calgary be enabled by default? if you choose 'y', Calgary
748 will be used (if it exists). If you choose 'n', Calgary will not be
749 used even if it exists. If you choose 'n' and would like to use
750 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
751 If unsure, say Y.
752
753# need this always selected by IOMMU for the VIA workaround
754config SWIOTLB
Joerg Roedela1afd012008-11-18 12:44:21 +0100755 def_bool y if X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100756 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100757 Support for software bounce buffers used on x86-64 systems
758 which don't have a hardware IOMMU (e.g. the current generation
759 of Intel's x86-64 CPUs). Using this PCI devices which can only
760 access 32-bits of memory can be used on systems with more than
761 3 GB of memory. If unsure, say Y.
762
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700763config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900764 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700765
Mike Travis1184dc22008-05-12 21:21:12 +0200766config MAXSMP
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200767 bool "Enable Maximum number of SMP Processors and NUMA Nodes"
Mike Travis36f51012008-12-16 17:33:51 -0800768 depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
769 select CPUMASK_OFFSTACK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100770 ---help---
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200771 Enable maximum number of CPUS and NUMA Nodes for this architecture.
Mike Travis1184dc22008-05-12 21:21:12 +0200772 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100773
774config NR_CPUS
Mike Travis36f51012008-12-16 17:33:51 -0800775 int "Maximum number of CPUs" if SMP && !MAXSMP
Michael K. Johnson2a3313f2009-04-21 21:44:48 -0400776 range 2 8 if SMP && X86_32 && !X86_BIGSMP
Mike Travis36f51012008-12-16 17:33:51 -0800777 range 2 512 if SMP && !MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800778 default "1" if !SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700779 default "4096" if MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800780 default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
781 default "8" if SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100782 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100783 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700784 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100785 minimum value which makes sense is 2.
786
787 This is purely to save memory - each supported CPU adds
788 approximately eight kilobytes to the kernel image.
789
790config SCHED_SMT
791 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800792 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100793 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100794 SMT scheduler support improves the CPU scheduler's decision making
795 when dealing with Intel Pentium 4 chips with HyperThreading at a
796 cost of slightly increased overhead in some places. If unsure say
797 N here.
798
799config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100800 def_bool y
801 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800802 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100803 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100804 Multi-core scheduler support improves the CPU scheduler's decision
805 making when dealing with multi-core CPU chips at a cost of slightly
806 increased overhead in some places. If unsure say N here.
807
Venkatesh Pallipadie82b8e42010-10-04 17:03:20 -0700808config IRQ_TIME_ACCOUNTING
809 bool "Fine granularity task level IRQ time accounting"
810 default n
811 ---help---
812 Select this option to enable fine granularity task irq time
813 accounting. This is done by reading a timestamp on each
814 transitions between softirq and hardirq state, so there can be a
815 small performance impact.
816
817 If in doubt, say N here.
818
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100819source "kernel/Kconfig.preempt"
820
821config X86_UP_APIC
822 bool "Local APIC support on uniprocessors"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100823 depends on X86_32 && !SMP && !X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100824 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100825 A local APIC (Advanced Programmable Interrupt Controller) is an
826 integrated interrupt controller in the CPU. If you have a single-CPU
827 system which has a processor with a local APIC, you can say Y here to
828 enable and use it. If you say Y here even though your machine doesn't
829 have a local APIC, then the kernel will still run with no slowdown at
830 all. The local APIC supports CPU-generated self-interrupts (timer,
831 performance counters), and the NMI watchdog which detects hard
832 lockups.
833
834config X86_UP_IOAPIC
835 bool "IO-APIC support on uniprocessors"
836 depends on X86_UP_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100837 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100838 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
839 SMP-capable replacement for PC-style interrupt controllers. Most
840 SMP systems and many recent uniprocessor systems have one.
841
842 If you have a single-CPU system with an IO-APIC, you can say Y here
843 to use it. If you say Y here even though your machine doesn't have
844 an IO-APIC, then the kernel will still run with no slowdown at all.
845
846config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100847 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100848 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100849
850config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100851 def_bool y
Henrik Kretzschmar1444e0c2011-02-22 15:38:07 +0100852 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100853
854config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100855 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100856 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100857
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200858config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
859 bool "Reroute for broken boot IRQs"
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200860 depends on X86_IO_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100861 ---help---
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200862 This option enables a workaround that fixes a source of
863 spurious interrupts. This is recommended when threaded
864 interrupt handling is used on systems where the generation of
865 superfluous "boot interrupts" cannot be disabled.
866
867 Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
868 entry in the chipset's IO-APIC is masked (as, e.g. the RT
869 kernel does during interrupt handling). On chipsets where this
870 boot IRQ generation cannot be disabled, this workaround keeps
871 the original IRQ line masked so that only the equivalent "boot
872 IRQ" is delivered to the CPUs. The workaround also tells the
873 kernel to set up the IRQ handler on the boot IRQ line. In this
874 way only one interrupt is delivered to the kernel. Otherwise
875 the spurious second interrupt may cause the kernel to bring
876 down (vital) interrupt lines.
877
878 Only affects "broken" chipsets. Interrupt sharing may be
879 increased on these systems.
880
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100881config X86_MCE
Andi Kleenbab9bc62009-07-09 00:31:38 +0200882 bool "Machine Check / overheating reporting"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100883 ---help---
Andi Kleenbab9bc62009-07-09 00:31:38 +0200884 Machine Check support allows the processor to notify the
885 kernel if it detects a problem (e.g. overheating, data corruption).
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100886 The action the kernel takes depends on the severity of the problem,
Andi Kleenbab9bc62009-07-09 00:31:38 +0200887 ranging from warning messages to halting the machine.
Andi Kleen4efc0672009-04-28 19:07:31 +0200888
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100889config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100890 def_bool y
891 prompt "Intel MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200892 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100893 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100894 Additional support for intel specific MCE features such as
895 the thermal monitor.
896
897config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100898 def_bool y
899 prompt "AMD MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200900 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100901 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100902 Additional support for AMD specific MCE features such as
903 the DRAM Error Threshold.
904
Andi Kleen4efc0672009-04-28 19:07:31 +0200905config X86_ANCIENT_MCE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100906 bool "Support for old Pentium 5 / WinChip machine checks"
Andi Kleenc31d9632009-07-09 00:31:37 +0200907 depends on X86_32 && X86_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900908 ---help---
909 Include support for machine check handling on old Pentium 5 or WinChip
910 systems. These typically need to be enabled explicitely on the command
911 line.
Andi Kleen4efc0672009-04-28 19:07:31 +0200912
Andi Kleenb2762682009-02-12 13:49:31 +0100913config X86_MCE_THRESHOLD
914 depends on X86_MCE_AMD || X86_MCE_INTEL
Jan Beulich6fc108a2010-04-21 15:23:44 +0100915 def_bool y
Andi Kleenb2762682009-02-12 13:49:31 +0100916
Andi Kleenea149b32009-04-29 19:31:00 +0200917config X86_MCE_INJECT
Andi Kleenc1ebf832009-07-09 00:31:41 +0200918 depends on X86_MCE
Andi Kleenea149b32009-04-29 19:31:00 +0200919 tristate "Machine check injector support"
920 ---help---
921 Provide support for injecting machine checks for testing purposes.
922 If you don't know what a machine check is and you don't do kernel
923 QA it is safe to say n.
924
Andi Kleen4efc0672009-04-28 19:07:31 +0200925config X86_THERMAL_VECTOR
926 def_bool y
Andi Kleen5bb38ad2009-07-09 00:31:39 +0200927 depends on X86_MCE_INTEL
Andi Kleen4efc0672009-04-28 19:07:31 +0200928
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100929config VM86
David Rientjes6a108a12011-01-20 14:44:16 -0800930 bool "Enable VM86 support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100931 default y
932 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100933 ---help---
934 This option is required by programs like DOSEMU to run 16-bit legacy
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100935 code on X86 processors. It also may be needed by software like
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100936 XFree86 to initialize some video cards via BIOS. Disabling this
937 option saves about 6k.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100938
939config TOSHIBA
940 tristate "Toshiba Laptop support"
941 depends on X86_32
942 ---help---
943 This adds a driver to safely access the System Management Mode of
944 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
945 not work on models with a Phoenix BIOS. The System Management Mode
946 is used to set the BIOS and power saving options on Toshiba portables.
947
948 For information on utilities to make use of this driver see the
949 Toshiba Linux utilities web site at:
950 <http://www.buzzard.org.uk/toshiba/>.
951
952 Say Y if you intend to run this kernel on a Toshiba portable.
953 Say N otherwise.
954
955config I8K
956 tristate "Dell laptop support"
Jean Delvare949a9d72011-05-25 20:43:33 +0200957 select HWMON
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100958 ---help---
959 This adds a driver to safely access the System Management Mode
960 of the CPU on the Dell Inspiron 8000. The System Management Mode
961 is used to read cpu temperature and cooling fan status and to
962 control the fans on the I8K portables.
963
964 This driver has been tested only on the Inspiron 8000 but it may
965 also work with other Dell laptops. You can force loading on other
966 models by passing the parameter `force=1' to the module. Use at
967 your own risk.
968
969 For information on utilities to make use of this driver see the
970 I8K Linux utilities web site at:
971 <http://people.debian.org/~dz/i8k/>
972
973 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
974 Say N otherwise.
975
976config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700977 bool "Enable X86 board specific fixups for reboot"
978 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100979 ---help---
980 This enables chipset and/or board specific fixups to be done
981 in order to get reboot to work correctly. This is only needed on
982 some combinations of hardware and BIOS. The symptom, for which
983 this config is intended, is when reboot ends with a stalled/hung
984 system.
985
986 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100987 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100988
989 Say Y if you want to enable the fixup. Currently, it's safe to
990 enable this option even if you don't need it.
991 Say N otherwise.
992
993config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200994 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100995 select FW_LOADER
996 ---help---
997 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200998 certain Intel and AMD processors. The Intel support is for the
999 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
1000 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
1001 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
1002 You will obviously need the actual microcode binary data itself
1003 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001004
Peter Oruba8d86f392008-07-28 18:44:21 +02001005 This option selects the general module only, you need to select
1006 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001007
1008 To compile this driver as a module, choose M here: the
1009 module will be called microcode.
1010
Peter Oruba8d86f392008-07-28 18:44:21 +02001011config MICROCODE_INTEL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001012 bool "Intel microcode patch loading support"
1013 depends on MICROCODE
1014 default MICROCODE
1015 select FW_LOADER
1016 ---help---
1017 This options enables microcode patch loading support for Intel
1018 processors.
Peter Oruba8d86f392008-07-28 18:44:21 +02001019
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001020 For latest news and information on obtaining all the required
1021 Intel ingredients for this driver, check:
1022 <http://www.urbanmyth.org/microcode/>.
Peter Oruba8d86f392008-07-28 18:44:21 +02001023
Peter Oruba80cc9f12008-07-28 18:44:22 +02001024config MICROCODE_AMD
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001025 bool "AMD microcode patch loading support"
1026 depends on MICROCODE
1027 select FW_LOADER
1028 ---help---
1029 If you select this option, microcode patch loading support for AMD
1030 processors will be enabled.
Peter Oruba80cc9f12008-07-28 18:44:22 +02001031
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001032config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001033 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001034 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001035
1036config X86_MSR
1037 tristate "/dev/cpu/*/msr - Model-specific register support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001038 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001039 This device gives privileged processes access to the x86
1040 Model-Specific Registers (MSRs). It is a character device with
1041 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
1042 MSR accesses are directed to a specific CPU on multi-processor
1043 systems.
1044
1045config X86_CPUID
1046 tristate "/dev/cpu/*/cpuid - CPU information support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001047 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001048 This device gives processes access to the x86 CPUID instruction to
1049 be executed on a specific processor. It is a character device
1050 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
1051 /dev/cpu/31/cpuid.
1052
1053choice
1054 prompt "High Memory Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001055 default HIGHMEM64G if X86_NUMAQ
Jan Beulich6fc108a2010-04-21 15:23:44 +01001056 default HIGHMEM4G
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001057 depends on X86_32
1058
1059config NOHIGHMEM
1060 bool "off"
1061 depends on !X86_NUMAQ
1062 ---help---
1063 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
1064 However, the address space of 32-bit x86 processors is only 4
1065 Gigabytes large. That means that, if you have a large amount of
1066 physical memory, not all of it can be "permanently mapped" by the
1067 kernel. The physical memory that's not permanently mapped is called
1068 "high memory".
1069
1070 If you are compiling a kernel which will never run on a machine with
1071 more than 1 Gigabyte total physical RAM, answer "off" here (default
1072 choice and suitable for most users). This will result in a "3GB/1GB"
1073 split: 3GB are mapped so that each process sees a 3GB virtual memory
1074 space and the remaining part of the 4GB virtual memory space is used
1075 by the kernel to permanently map as much physical memory as
1076 possible.
1077
1078 If the machine has between 1 and 4 Gigabytes physical RAM, then
1079 answer "4GB" here.
1080
1081 If more than 4 Gigabytes is used then answer "64GB" here. This
1082 selection turns Intel PAE (Physical Address Extension) mode on.
1083 PAE implements 3-level paging on IA32 processors. PAE is fully
1084 supported by Linux, PAE mode is implemented on all recent Intel
1085 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
1086 then the kernel will not boot on CPUs that don't support PAE!
1087
1088 The actual amount of total physical memory will either be
1089 auto detected or can be forced by using a kernel command line option
1090 such as "mem=256M". (Try "man bootparam" or see the documentation of
1091 your boot loader (lilo or loadlin) about how to pass options to the
1092 kernel at boot time.)
1093
1094 If unsure, say "off".
1095
1096config HIGHMEM4G
1097 bool "4GB"
1098 depends on !X86_NUMAQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001099 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001100 Select this if you have a 32-bit processor and between 1 and 4
1101 gigabytes of physical RAM.
1102
1103config HIGHMEM64G
1104 bool "64GB"
1105 depends on !M386 && !M486
1106 select X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001107 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001108 Select this if you have a 32-bit processor and more than 4
1109 gigabytes of physical RAM.
1110
1111endchoice
1112
1113choice
1114 depends on EXPERIMENTAL
David Rientjes6a108a12011-01-20 14:44:16 -08001115 prompt "Memory split" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001116 default VMSPLIT_3G
1117 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001118 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001119 Select the desired split between kernel and user memory.
1120
1121 If the address range available to the kernel is less than the
1122 physical memory installed, the remaining memory will be available
1123 as "high memory". Accessing high memory is a little more costly
1124 than low memory, as it needs to be mapped into the kernel first.
1125 Note that increasing the kernel address space limits the range
1126 available to user programs, making the address space there
1127 tighter. Selecting anything other than the default 3G/1G split
1128 will also likely make your kernel incompatible with binary-only
1129 kernel modules.
1130
1131 If you are not absolutely sure what you are doing, leave this
1132 option alone!
1133
1134 config VMSPLIT_3G
1135 bool "3G/1G user/kernel split"
1136 config VMSPLIT_3G_OPT
1137 depends on !X86_PAE
1138 bool "3G/1G user/kernel split (for full 1G low memory)"
1139 config VMSPLIT_2G
1140 bool "2G/2G user/kernel split"
1141 config VMSPLIT_2G_OPT
1142 depends on !X86_PAE
1143 bool "2G/2G user/kernel split (for full 2G low memory)"
1144 config VMSPLIT_1G
1145 bool "1G/3G user/kernel split"
1146endchoice
1147
1148config PAGE_OFFSET
1149 hex
1150 default 0xB0000000 if VMSPLIT_3G_OPT
1151 default 0x80000000 if VMSPLIT_2G
1152 default 0x78000000 if VMSPLIT_2G_OPT
1153 default 0x40000000 if VMSPLIT_1G
1154 default 0xC0000000
1155 depends on X86_32
1156
1157config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001158 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001159 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001160
1161config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -07001162 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001163 depends on X86_32 && !HIGHMEM4G
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001164 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001165 PAE is required for NX support, and furthermore enables
1166 larger swapspace support for non-overcommit purposes. It
1167 has the cost of more pagetable lookup overhead, and also
1168 consumes more pagetable space per process.
1169
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001170config ARCH_PHYS_ADDR_T_64BIT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001171 def_bool X86_64 || X86_PAE
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001172
FUJITA Tomonori66f2b062010-10-20 15:55:35 -07001173config ARCH_DMA_ADDR_T_64BIT
1174 def_bool X86_64 || HIGHMEM64G
1175
Nick Piggin9e899812008-10-22 12:33:16 +02001176config DIRECT_GBPAGES
David Rientjes6a108a12011-01-20 14:44:16 -08001177 bool "Enable 1GB pages for kernel pagetables" if EXPERT
Nick Piggin9e899812008-10-22 12:33:16 +02001178 default y
1179 depends on X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001180 ---help---
Nick Piggin9e899812008-10-22 12:33:16 +02001181 Allow the kernel linear mapping to use 1GB pages on CPUs that
1182 support it. This can improve the kernel's performance a tiny bit by
1183 reducing TLB pressure. If in doubt, say "Y".
1184
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001185# Common NUMA Features
1186config NUMA
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001187 bool "Numa Memory Allocation and Scheduler Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001188 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +01001189 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Yinghai Lu0699eae2008-06-17 15:39:01 -07001190 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001191 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001192 Enable NUMA (Non Uniform Memory Access) support.
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001193
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001194 The kernel will try to allocate memory used by a CPU on the
1195 local memory controller of the CPU and add some more
1196 NUMA awareness to the kernel.
1197
Ingo Molnarc280ea52008-11-08 13:29:45 +01001198 For 64-bit this is recommended if the system is Intel Core i7
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001199 (or later), AMD Opteron, or EM64T NUMA.
1200
1201 For 32-bit this is only needed on (rare) 32-bit-only platforms
1202 that support NUMA topologies, such as NUMAQ / Summit, or if you
1203 boot a 32-bit kernel on a 64-bit NUMA platform.
1204
1205 Otherwise, you should say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001206
1207comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
1208 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
1209
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001210config AMD_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001211 def_bool y
1212 prompt "Old style AMD Opteron NUMA detection"
Tejun Heo5da0ef92011-07-11 10:34:32 +02001213 depends on X86_64 && NUMA && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001214 ---help---
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001215 Enable AMD NUMA node topology detection. You should say Y here if
1216 you have a multi processor AMD system. This uses an old method to
1217 read the NUMA configuration directly from the builtin Northbridge
1218 of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
1219 which also takes priority if both are compiled in.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001220
1221config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001222 def_bool y
1223 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001224 depends on X86_64 && NUMA && ACPI && PCI
1225 select ACPI_NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001226 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001227 Enable ACPI SRAT based node topology detection.
1228
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001229# Some NUMA nodes have memory ranges that span
1230# other nodes. Even though a pfn is valid and
1231# between a node's start and end pfns, it may not
1232# reside on that node. See memmap_init_zone()
1233# for details.
1234config NODES_SPAN_OTHER_NODES
1235 def_bool y
1236 depends on X86_64_ACPI_NUMA
1237
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001238config NUMA_EMU
1239 bool "NUMA emulation"
Tejun Heo1b7e03e2011-05-02 17:24:48 +02001240 depends on NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001241 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001242 Enable NUMA emulation. A flat machine will be split
1243 into virtual nodes when booted with "numa=fake=N", where N is the
1244 number of nodes. This is only useful for debugging.
1245
1246config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001247 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
David Rientjes51591e32010-03-25 15:39:27 -07001248 range 1 10
1249 default "10" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001250 default "6" if X86_64
1251 default "4" if X86_NUMAQ
1252 default "3"
1253 depends on NEED_MULTIPLE_NODES
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001254 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +02001255 Specify the maximum number of NUMA Nodes available on the target
Matt LaPlante692105b2009-01-26 11:12:25 +01001256 system. Increases memory reserved to accommodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001257
Tejun Heoc1329372009-02-24 11:57:20 +09001258config HAVE_ARCH_BOOTMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001259 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001260 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001261
Tejun Heo3b166512011-04-01 11:15:12 +02001262config HAVE_ARCH_ALLOC_REMAP
1263 def_bool y
1264 depends on X86_32 && NUMA
1265
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001266config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001267 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001268 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001269
1270config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001271 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001272 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001273
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001274config ARCH_FLATMEM_ENABLE
1275 def_bool y
Tejun Heo3b166512011-04-01 11:15:12 +02001276 depends on X86_32 && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001277
1278config ARCH_DISCONTIGMEM_ENABLE
1279 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001280 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001281
1282config ARCH_DISCONTIGMEM_DEFAULT
1283 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001284 depends on NUMA && X86_32
1285
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001286config ARCH_SPARSEMEM_ENABLE
1287 def_bool y
Yinghai Lu4272ebf2009-01-29 15:14:46 -08001288 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001289 select SPARSEMEM_STATIC if X86_32
1290 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1291
Tejun Heo3b166512011-04-01 11:15:12 +02001292config ARCH_SPARSEMEM_DEFAULT
1293 def_bool y
1294 depends on X86_64
1295
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001296config ARCH_SELECT_MEMORY_MODEL
1297 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001298 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001299
1300config ARCH_MEMORY_PROBE
1301 def_bool X86_64
1302 depends on MEMORY_HOTPLUG
1303
Tejun Heo3b166512011-04-01 11:15:12 +02001304config ARCH_PROC_KCORE_TEXT
1305 def_bool y
1306 depends on X86_64 && PROC_KCORE
1307
Avi Kivitya29815a2010-01-10 16:28:09 +02001308config ILLEGAL_POINTER_VALUE
1309 hex
1310 default 0 if X86_32
1311 default 0xdead000000000000 if X86_64
1312
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001313source "mm/Kconfig"
1314
1315config HIGHPTE
1316 bool "Allocate 3rd-level pagetables from highmem"
Jan Beulich6fc108a2010-04-21 15:23:44 +01001317 depends on HIGHMEM
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001318 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001319 The VM uses one page table entry for each page of physical memory.
1320 For systems with a lot of RAM, this can be wasteful of precious
1321 low memory. Setting this option will put user-space page table
1322 entries in high memory.
1323
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001324config X86_CHECK_BIOS_CORRUPTION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001325 bool "Check for low memory corruption"
1326 ---help---
1327 Periodically check for memory corruption in low memory, which
1328 is suspected to be caused by BIOS. Even when enabled in the
1329 configuration, it is disabled at runtime. Enable it by
1330 setting "memory_corruption_check=1" on the kernel command
1331 line. By default it scans the low 64k of memory every 60
1332 seconds; see the memory_corruption_check_size and
1333 memory_corruption_check_period parameters in
1334 Documentation/kernel-parameters.txt to adjust this.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001335
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001336 When enabled with the default parameters, this option has
1337 almost no overhead, as it reserves a relatively small amount
1338 of memory and scans it infrequently. It both detects corruption
1339 and prevents it from affecting the running system.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001340
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001341 It is, however, intended as a diagnostic tool; if repeatable
1342 BIOS-originated corruption always affects the same memory,
1343 you can use memmap= to prevent the kernel from using that
1344 memory.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001345
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001346config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001347 bool "Set the default setting of memory_corruption_check"
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001348 depends on X86_CHECK_BIOS_CORRUPTION
1349 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001350 ---help---
1351 Set whether the default state of memory_corruption_check is
1352 on or off.
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001353
H. Peter Anvin9ea77bd2010-08-25 16:38:20 -07001354config X86_RESERVE_LOW
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001355 int "Amount of low memory, in kilobytes, to reserve for the BIOS"
1356 default 64
1357 range 4 640
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001358 ---help---
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001359 Specify the amount of low memory to reserve for the BIOS.
Ingo Molnarfc381512008-09-16 10:07:34 +02001360
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001361 The first page contains BIOS data structures that the kernel
1362 must not use, so that page must always be reserved.
Ingo Molnarfc381512008-09-16 10:07:34 +02001363
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001364 By default we reserve the first 64K of physical RAM, as a
1365 number of BIOSes are known to corrupt that memory range
1366 during events such as suspend/resume or monitor cable
1367 insertion, so it must not be used by the kernel.
Ingo Molnarfc381512008-09-16 10:07:34 +02001368
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001369 You can set this to 4 if you are absolutely sure that you
1370 trust the BIOS to get all its memory reservations and usages
1371 right. If you know your BIOS have problems beyond the
1372 default 64K area, you can set this to 640 to avoid using the
1373 entire low memory range.
1374
1375 If you have doubts about the BIOS (e.g. suspend/resume does
1376 not work or there's kernel crashes after certain hardware
1377 hotplug events) then you might want to enable
1378 X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check
1379 typical corruption patterns.
1380
1381 Leave this to the default value of 64 if you are unsure.
Ingo Molnarfc381512008-09-16 10:07:34 +02001382
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001383config MATH_EMULATION
1384 bool
1385 prompt "Math emulation" if X86_32
1386 ---help---
1387 Linux can emulate a math coprocessor (used for floating point
1388 operations) if you don't have one. 486DX and Pentium processors have
1389 a math coprocessor built in, 486SX and 386 do not, unless you added
1390 a 487DX or 387, respectively. (The messages during boot time can
1391 give you some hints here ["man dmesg"].) Everyone needs either a
1392 coprocessor or this emulation.
1393
1394 If you don't have a math coprocessor, you need to say Y here; if you
1395 say Y here even though you have a coprocessor, the coprocessor will
1396 be used nevertheless. (This behavior can be changed with the kernel
1397 command line option "no387", which comes handy if your coprocessor
1398 is broken. Try "man bootparam" or see the documentation of your boot
1399 loader (lilo or loadlin) about how to pass options to the kernel at
1400 boot time.) This means that it is a good idea to say Y here if you
1401 intend to use this kernel on different machines.
1402
1403 More information about the internals of the Linux math coprocessor
1404 emulation can be found in <file:arch/x86/math-emu/README>.
1405
1406 If you are not sure, say Y; apart from resulting in a 66 KB bigger
1407 kernel, it won't hurt.
1408
1409config MTRR
Jan Beulich6fc108a2010-04-21 15:23:44 +01001410 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001411 prompt "MTRR (Memory Type Range Register) support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001412 ---help---
1413 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1414 the Memory Type Range Registers (MTRRs) may be used to control
1415 processor access to memory ranges. This is most useful if you have
1416 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1417 allows bus write transfers to be combined into a larger transfer
1418 before bursting over the PCI/AGP bus. This can increase performance
1419 of image write operations 2.5 times or more. Saying Y here creates a
1420 /proc/mtrr file which may be used to manipulate your processor's
1421 MTRRs. Typically the X server should use this.
1422
1423 This code has a reasonably generic interface so that similar
1424 control registers on other processors can be easily supported
1425 as well:
1426
1427 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1428 Registers (ARRs) which provide a similar functionality to MTRRs. For
1429 these, the ARRs are used to emulate the MTRRs.
1430 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1431 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1432 write-combining. All of these processors are supported by this code
1433 and it makes sense to say Y here if you have one of them.
1434
1435 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1436 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1437 can lead to all sorts of problems, so it's good to say Y here.
1438
1439 You can safely say Y even if your machine doesn't have MTRRs, you'll
1440 just add about 9 KB to your kernel.
1441
Randy Dunlap7225e752008-07-26 17:54:22 -07001442 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001443
Yinghai Lu95ffa242008-04-29 03:52:33 -07001444config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001445 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001446 prompt "MTRR cleanup support"
1447 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001448 ---help---
Thomas Gleixneraba37282008-07-15 14:48:48 +02001449 Convert MTRR layout from continuous to discrete, so X drivers can
1450 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001451
Thomas Gleixneraba37282008-07-15 14:48:48 +02001452 Can be disabled with disable_mtrr_cleanup on the kernel command line.
Matt LaPlante692105b2009-01-26 11:12:25 +01001453 The largest mtrr entry size for a continuous block can be set with
Thomas Gleixneraba37282008-07-15 14:48:48 +02001454 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001455
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001456 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001457
1458config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001459 int "MTRR cleanup enable value (0-1)"
1460 range 0 1
1461 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001462 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001463 ---help---
Yinghai Luf5098d62008-04-29 20:25:58 -07001464 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001465
Yinghai Lu12031a62008-05-02 02:40:22 -07001466config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1467 int "MTRR cleanup spare reg num (0-7)"
1468 range 0 7
1469 default "1"
1470 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001471 ---help---
Yinghai Lu12031a62008-05-02 02:40:22 -07001472 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001473 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001474
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001475config X86_PAT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001476 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001477 prompt "x86 PAT support" if EXPERT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001478 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001479 ---help---
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001480 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001481
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001482 PATs are the modern equivalents of MTRRs and are much more
1483 flexible than MTRRs.
1484
1485 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001486 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001487
1488 If unsure, say Y.
1489
Venkatesh Pallipadi46cf98c2009-07-10 09:57:37 -07001490config ARCH_USES_PG_UNCACHED
1491 def_bool y
1492 depends on X86_PAT
1493
H. Peter Anvin628c6242011-07-31 13:59:29 -07001494config ARCH_RANDOM
1495 def_bool y
1496 prompt "x86 architectural random number generator" if EXPERT
1497 ---help---
1498 Enable the x86 architectural RDRAND instruction
1499 (Intel Bull Mountain technology) to generate random numbers.
1500 If supported, this is a high bandwidth, cryptographically
1501 secure hardware random number generator.
1502
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001503config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001504 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001505 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001506 ---help---
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001507 This enables the kernel to use EFI runtime services that are
1508 available (such as the EFI variable services).
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001509
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001510 This option is only useful on systems that have EFI firmware.
1511 In addition, you should use the latest ELILO loader available
1512 at <http://elilo.sourceforge.net> in order to take advantage
1513 of EFI runtime services. However, even with this option, the
1514 resultant kernel should continue to boot on existing non-EFI
1515 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001516
Matt Fleming291f3632011-12-12 21:27:52 +00001517config EFI_STUB
1518 bool "EFI stub support"
1519 depends on EFI
1520 ---help---
1521 This kernel feature allows a bzImage to be loaded directly
1522 by EFI firmware without the use of a bootloader.
1523
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001524config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001525 def_bool y
1526 prompt "Enable seccomp to safely compute untrusted bytecode"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001527 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001528 This kernel feature is useful for number crunching applications
1529 that may need to compute untrusted bytecode during their
1530 execution. By using pipes or other transports made available to
1531 the process as file descriptors supporting the read/write
1532 syscalls, it's possible to isolate those applications in
1533 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001534 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001535 and the task is only allowed to execute a few safe syscalls
1536 defined by each seccomp mode.
1537
1538 If unsure, say Y. Only embedded should say N here.
1539
1540config CC_STACKPROTECTOR
1541 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001542 ---help---
1543 This option turns on the -fstack-protector GCC feature. This
Ingo Molnar113c5412008-02-14 10:36:03 +01001544 feature puts, at the beginning of functions, a canary value on
1545 the stack just before the return address, and validates
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001546 the value just before actually returning. Stack based buffer
1547 overflows (that need to overwrite this return address) now also
1548 overwrite the canary, which gets detected and the attack is then
1549 neutralized via a kernel panic.
1550
1551 This feature requires gcc version 4.2 or above, or a distribution
1552 gcc with the feature backported. Older versions are automatically
Ingo Molnar113c5412008-02-14 10:36:03 +01001553 detected and for those versions, this configuration option is
1554 ignored. (and a warning is printed during bootup)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001555
1556source kernel/Kconfig.hz
1557
1558config KEXEC
1559 bool "kexec system call"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001560 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001561 kexec is a system call that implements the ability to shutdown your
1562 current kernel, and to start another kernel. It is like a reboot
1563 but it is independent of the system firmware. And like a reboot
1564 you can start any kernel with it, not just Linux.
1565
1566 The name comes from the similarity to the exec system call.
1567
1568 It is an ongoing process to be certain the hardware in a machine
1569 is properly shutdown, so do not be surprised if this code does not
1570 initially work for you. It may help to enable device hotplugging
1571 support. As of this writing the exact hardware interface is
1572 strongly in flux, so no good recommendation can be made.
1573
1574config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001575 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001576 depends on X86_64 || (X86_32 && HIGHMEM)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001577 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001578 Generate crash dump after being started by kexec.
1579 This should be normally only set in special crash dump kernels
1580 which are loaded in the main kernel with kexec-tools into
1581 a specially reserved region and then later executed after
1582 a crash by kdump/kexec. The crash dump kernel must be compiled
1583 to a memory address not used by the main kernel or BIOS using
1584 PHYSICAL_START, or it must be built as a relocatable image
1585 (CONFIG_RELOCATABLE=y).
1586 For more details see Documentation/kdump/kdump.txt
1587
Huang Ying3ab83522008-07-25 19:45:07 -07001588config KEXEC_JUMP
1589 bool "kexec jump (EXPERIMENTAL)"
1590 depends on EXPERIMENTAL
Huang Yingfee7b0d2009-03-10 10:57:16 +08001591 depends on KEXEC && HIBERNATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001592 ---help---
Huang Ying89081d12008-07-25 19:45:10 -07001593 Jump between original kernel and kexeced kernel and invoke
1594 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001595
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001596config PHYSICAL_START
David Rientjes6a108a12011-01-20 14:44:16 -08001597 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001598 default "0x1000000"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001599 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001600 This gives the physical address where the kernel is loaded.
1601
1602 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1603 bzImage will decompress itself to above physical address and
1604 run from there. Otherwise, bzImage will run from the address where
1605 it has been loaded by the boot loader and will ignore above physical
1606 address.
1607
1608 In normal kdump cases one does not have to set/change this option
1609 as now bzImage can be compiled as a completely relocatable image
1610 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1611 address. This option is mainly useful for the folks who don't want
1612 to use a bzImage for capturing the crash dump and want to use a
1613 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1614 to be specifically compiled to run from a specific memory area
1615 (normally a reserved region) and this option comes handy.
1616
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001617 So if you are using bzImage for capturing the crash dump,
1618 leave the value here unchanged to 0x1000000 and set
1619 CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
1620 for capturing the crash dump change this value to start of
1621 the reserved region. In other words, it can be set based on
1622 the "X" value as specified in the "crashkernel=YM@XM"
1623 command line boot parameter passed to the panic-ed
1624 kernel. Please take a look at Documentation/kdump/kdump.txt
1625 for more details about crash dumps.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001626
1627 Usage of bzImage for capturing the crash dump is recommended as
1628 one does not have to build two kernels. Same kernel can be used
1629 as production kernel and capture kernel. Above option should have
1630 gone away after relocatable bzImage support is introduced. But it
1631 is present because there are users out there who continue to use
1632 vmlinux for dump capture. This option should go away down the
1633 line.
1634
1635 Don't change this unless you know what you are doing.
1636
1637config RELOCATABLE
H. Peter Anvin26717802009-05-07 14:19:34 -07001638 bool "Build a relocatable kernel"
1639 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001640 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001641 This builds a kernel image that retains relocation information
1642 so it can be loaded someplace besides the default 1MB.
1643 The relocations tend to make the kernel binary about 10% larger,
1644 but are discarded at runtime.
1645
1646 One use is for the kexec on panic case where the recovery kernel
1647 must live at a different physical address than the primary
1648 kernel.
1649
1650 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1651 it has been loaded at and the compile time physical address
1652 (CONFIG_PHYSICAL_START) is ignored.
1653
H. Peter Anvin845adf72009-05-05 21:20:51 -07001654# Relocation on x86-32 needs some additional build support
1655config X86_NEED_RELOCS
1656 def_bool y
1657 depends on X86_32 && RELOCATABLE
1658
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001659config PHYSICAL_ALIGN
Jan Beulich6fc108a2010-04-21 15:23:44 +01001660 hex "Alignment value to which kernel should be aligned" if X86_32
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001661 default "0x1000000"
1662 range 0x2000 0x1000000
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001663 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001664 This value puts the alignment restrictions on physical address
1665 where kernel is loaded and run from. Kernel is compiled for an
1666 address which meets above alignment restriction.
1667
1668 If bootloader loads the kernel at a non-aligned address and
1669 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1670 address aligned to above value and run from there.
1671
1672 If bootloader loads the kernel at a non-aligned address and
1673 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1674 load address and decompress itself to the address it has been
1675 compiled for and run from there. The address for which kernel is
1676 compiled already meets above alignment restrictions. Hence the
1677 end result is that kernel runs from a physical address meeting
1678 above alignment restrictions.
1679
1680 Don't change this unless you know what you are doing.
1681
1682config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001683 bool "Support for hot-pluggable CPUs"
Ingo Molnar4b19ed912009-01-27 17:47:24 +01001684 depends on SMP && HOTPLUG
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001685 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001686 Say Y here to allow turning CPUs off and on. CPUs can be
1687 controlled through /sys/devices/system/cpu.
1688 ( Note: power management support will enable this option
1689 automatically on SMP systems. )
1690 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001691
1692config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001693 def_bool y
1694 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001695 depends on X86_32 || IA32_EMULATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001696 ---help---
Roland McGrathaf65d642008-01-30 13:30:43 +01001697 Map the 32-bit VDSO to the predictable old-style address too.
Randy Dunlape84446d2009-11-10 15:46:52 -08001698
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001699 Say N here if you are running a sufficiently recent glibc
1700 version (2.3.3 or later), to remove the high-mapped
1701 VDSO mapping and to exclusively use the randomized VDSO.
1702
1703 If unsure, say Y.
1704
Tim Bird516cbf32008-08-12 12:52:36 -07001705config CMDLINE_BOOL
1706 bool "Built-in kernel command line"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001707 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001708 Allow for specifying boot arguments to the kernel at
1709 build time. On some systems (e.g. embedded ones), it is
1710 necessary or convenient to provide some or all of the
1711 kernel boot arguments with the kernel itself (that is,
1712 to not rely on the boot loader to provide them.)
1713
1714 To compile command line arguments into the kernel,
1715 set this option to 'Y', then fill in the
1716 the boot arguments in CONFIG_CMDLINE.
1717
1718 Systems with fully functional boot loaders (i.e. non-embedded)
1719 should leave this option set to 'N'.
1720
1721config CMDLINE
1722 string "Built-in kernel command string"
1723 depends on CMDLINE_BOOL
1724 default ""
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001725 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001726 Enter arguments here that should be compiled into the kernel
1727 image and used at boot time. If the boot loader provides a
1728 command line at boot time, it is appended to this string to
1729 form the full kernel command line, when the system boots.
1730
1731 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1732 change this behavior.
1733
1734 In most cases, the command line (whether built-in or provided
1735 by the boot loader) should specify the device for the root
1736 file system.
1737
1738config CMDLINE_OVERRIDE
1739 bool "Built-in command line overrides boot loader arguments"
Tim Bird516cbf32008-08-12 12:52:36 -07001740 depends on CMDLINE_BOOL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001741 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001742 Set this option to 'Y' to have the kernel ignore the boot loader
1743 command line, and use ONLY the built-in command line.
1744
1745 This is used to work around broken boot loaders. This should
1746 be set to 'N' under normal conditions.
1747
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001748endmenu
1749
1750config ARCH_ENABLE_MEMORY_HOTPLUG
1751 def_bool y
1752 depends on X86_64 || (X86_32 && HIGHMEM)
1753
Gary Hade35551052008-10-31 10:52:03 -07001754config ARCH_ENABLE_MEMORY_HOTREMOVE
1755 def_bool y
1756 depends on MEMORY_HOTPLUG
1757
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001758config USE_PERCPU_NUMA_NODE_ID
Tejun Heo645a7912011-01-23 14:37:40 +01001759 def_bool y
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001760 depends on NUMA
1761
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001762menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001763
1764config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001765 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001766 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001767
1768source "kernel/power/Kconfig"
1769
1770source "drivers/acpi/Kconfig"
1771
Feng Tangefafc8b2009-08-14 15:23:29 -04001772source "drivers/sfi/Kconfig"
1773
Andi Kleena6b68072008-01-30 13:32:49 +01001774config X86_APM_BOOT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001775 def_bool y
Paul Bolle282e5aa2011-11-17 11:41:31 +01001776 depends on APM
Andi Kleena6b68072008-01-30 13:32:49 +01001777
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001778menuconfig APM
1779 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001780 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001781 ---help---
1782 APM is a BIOS specification for saving power using several different
1783 techniques. This is mostly useful for battery powered laptops with
1784 APM compliant BIOSes. If you say Y here, the system time will be
1785 reset after a RESUME operation, the /proc/apm device will provide
1786 battery status information, and user-space programs will receive
1787 notification of APM "events" (e.g. battery status change).
1788
1789 If you select "Y" here, you can disable actual use of the APM
1790 BIOS by passing the "apm=off" option to the kernel at boot time.
1791
1792 Note that the APM support is almost completely disabled for
1793 machines with more than one CPU.
1794
1795 In order to use APM, you will need supporting software. For location
Michael Witten2dc98fd2011-07-08 21:11:16 +00001796 and more information, read <file:Documentation/power/apm-acpi.txt>
1797 and the Battery Powered Linux mini-HOWTO, available from
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001798 <http://www.tldp.org/docs.html#howto>.
1799
1800 This driver does not spin down disk drives (see the hdparm(8)
1801 manpage ("man 8 hdparm") for that), and it doesn't turn off
1802 VESA-compliant "green" monitors.
1803
1804 This driver does not support the TI 4000M TravelMate and the ACER
1805 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1806 desktop machines also don't have compliant BIOSes, and this driver
1807 may cause those machines to panic during the boot phase.
1808
1809 Generally, if you don't have a battery in your machine, there isn't
1810 much point in using this driver and you should say N. If you get
1811 random kernel OOPSes or reboots that don't seem to be related to
1812 anything, try disabling/enabling this option (or disabling/enabling
1813 APM in your BIOS).
1814
1815 Some other things you should try when experiencing seemingly random,
1816 "weird" problems:
1817
1818 1) make sure that you have enough swap space and that it is
1819 enabled.
1820 2) pass the "no-hlt" option to the kernel
1821 3) switch on floating point emulation in the kernel and pass
1822 the "no387" option to the kernel
1823 4) pass the "floppy=nodma" option to the kernel
1824 5) pass the "mem=4M" option to the kernel (thereby disabling
1825 all but the first 4 MB of RAM)
1826 6) make sure that the CPU is not over clocked.
1827 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1828 8) disable the cache from your BIOS settings
1829 9) install a fan for the video card or exchange video RAM
1830 10) install a better fan for the CPU
1831 11) exchange RAM chips
1832 12) exchange the motherboard.
1833
1834 To compile this driver as a module, choose M here: the
1835 module will be called apm.
1836
1837if APM
1838
1839config APM_IGNORE_USER_SUSPEND
1840 bool "Ignore USER SUSPEND"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001841 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001842 This option will ignore USER SUSPEND requests. On machines with a
1843 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1844 series notebooks, it is necessary to say Y because of a BIOS bug.
1845
1846config APM_DO_ENABLE
1847 bool "Enable PM at boot time"
1848 ---help---
1849 Enable APM features at boot time. From page 36 of the APM BIOS
1850 specification: "When disabled, the APM BIOS does not automatically
1851 power manage devices, enter the Standby State, enter the Suspend
1852 State, or take power saving steps in response to CPU Idle calls."
1853 This driver will make CPU Idle calls when Linux is idle (unless this
1854 feature is turned off -- see "Do CPU IDLE calls", below). This
1855 should always save battery power, but more complicated APM features
1856 will be dependent on your BIOS implementation. You may need to turn
1857 this option off if your computer hangs at boot time when using APM
1858 support, or if it beeps continuously instead of suspending. Turn
1859 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1860 T400CDT. This is off by default since most machines do fine without
1861 this feature.
1862
1863config APM_CPU_IDLE
1864 bool "Make CPU Idle calls when idle"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001865 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001866 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1867 On some machines, this can activate improved power savings, such as
1868 a slowed CPU clock rate, when the machine is idle. These idle calls
1869 are made after the idle loop has run for some length of time (e.g.,
1870 333 mS). On some machines, this will cause a hang at boot time or
1871 whenever the CPU becomes idle. (On machines with more than one CPU,
1872 this option does nothing.)
1873
1874config APM_DISPLAY_BLANK
1875 bool "Enable console blanking using APM"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001876 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001877 Enable console blanking using the APM. Some laptops can use this to
1878 turn off the LCD backlight when the screen blanker of the Linux
1879 virtual console blanks the screen. Note that this is only used by
1880 the virtual console screen blanker, and won't turn off the backlight
1881 when using the X Window system. This also doesn't have anything to
1882 do with your VESA-compliant power-saving monitor. Further, this
1883 option doesn't work for all laptops -- it might not turn off your
1884 backlight at all, or it might print a lot of errors to the console,
1885 especially if you are using gpm.
1886
1887config APM_ALLOW_INTS
1888 bool "Allow interrupts during APM BIOS calls"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001889 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001890 Normally we disable external interrupts while we are making calls to
1891 the APM BIOS as a measure to lessen the effects of a badly behaving
1892 BIOS implementation. The BIOS should reenable interrupts if it
1893 needs to. Unfortunately, some BIOSes do not -- especially those in
1894 many of the newer IBM Thinkpads. If you experience hangs when you
1895 suspend, try setting this to Y. Otherwise, say N.
1896
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001897endif # APM
1898
Dave Jonesbb0a56e2011-05-19 18:51:07 -04001899source "drivers/cpufreq/Kconfig"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001900
1901source "drivers/cpuidle/Kconfig"
1902
Andy Henroid27471fd2008-10-09 11:45:22 -07001903source "drivers/idle/Kconfig"
1904
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001905endmenu
1906
1907
1908menu "Bus options (PCI etc.)"
1909
1910config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001911 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001912 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001913 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001914 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001915 Find out whether you have a PCI motherboard. PCI is the name of a
1916 bus system, i.e. the way the CPU talks to the other stuff inside
1917 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1918 VESA. If you have PCI, say Y, otherwise N.
1919
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001920choice
1921 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001922 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001923 default PCI_GOANY
1924 ---help---
1925 On PCI systems, the BIOS can be used to detect the PCI devices and
1926 determine their configuration. However, some old PCI motherboards
1927 have BIOS bugs and may crash if this is done. Also, some embedded
1928 PCI-based systems don't have any BIOS at all. Linux can also try to
1929 detect the PCI hardware directly without using the BIOS.
1930
1931 With this option, you can specify how Linux should detect the
1932 PCI devices. If you choose "BIOS", the BIOS will be used,
1933 if you choose "Direct", the BIOS won't be used, and if you
1934 choose "MMConfig", then PCI Express MMCONFIG will be used.
1935 If you choose "Any", the kernel will try MMCONFIG, then the
1936 direct access method and falls back to the BIOS if that doesn't
1937 work. If unsure, go with the default, which is "Any".
1938
1939config PCI_GOBIOS
1940 bool "BIOS"
1941
1942config PCI_GOMMCONFIG
1943 bool "MMConfig"
1944
1945config PCI_GODIRECT
1946 bool "Direct"
1947
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001948config PCI_GOOLPC
Daniel Drake76fb6572010-09-23 17:28:04 +01001949 bool "OLPC XO-1"
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001950 depends on OLPC
1951
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001952config PCI_GOANY
1953 bool "Any"
1954
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001955endchoice
1956
1957config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001958 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001959 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001960
1961# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1962config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001963 def_bool y
Shaohua Li0aba4962011-05-27 14:59:39 +08001964 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001965
1966config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001967 def_bool y
Feng Tang5f0db7a2009-08-14 15:37:50 -04001968 depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001969
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001970config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001971 def_bool y
1972 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001973
Alex Nixonb5401a92010-03-18 16:31:34 -04001974config PCI_XEN
1975 def_bool y
1976 depends on PCI && XEN
1977 select SWIOTLB_XEN
1978
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001979config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001980 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001981 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001982
1983config PCI_MMCONFIG
1984 bool "Support mmconfig PCI config space access"
1985 depends on X86_64 && PCI && ACPI
1986
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001987config PCI_CNB20LE_QUIRK
David Rientjes6a108a12011-01-20 14:44:16 -08001988 bool "Read CNB20LE Host Bridge Windows" if EXPERT
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001989 default n
1990 depends on PCI && EXPERIMENTAL
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001991 help
1992 Read the PCI windows out of the CNB20LE host bridge. This allows
1993 PCI hotplug to work on systems with the CNB20LE chipset which do
1994 not have ACPI.
1995
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001996 There's no public spec for this chipset, and this functionality
1997 is known to be incomplete.
1998
1999 You should say N unless you know you need this.
2000
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002001source "drivers/pci/pcie/Kconfig"
2002
2003source "drivers/pci/Kconfig"
2004
David Rientjes1c00f012011-03-22 16:34:59 -07002005# x86_64 have no ISA slots, but can have ISA-style DMA.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002006config ISA_DMA_API
David Rientjes1c00f012011-03-22 16:34:59 -07002007 bool "ISA-style DMA support" if (X86_64 && EXPERT)
2008 default y
2009 help
2010 Enables ISA-style DMA support for devices requiring such controllers.
2011 If unsure, say Y.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002012
2013if X86_32
2014
2015config ISA
2016 bool "ISA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002017 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002018 Find out whether you have ISA slots on your motherboard. ISA is the
2019 name of a bus system, i.e. the way the CPU talks to the other stuff
2020 inside your box. Other bus systems are PCI, EISA, MicroChannel
2021 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
2022 newer boards don't support it. If you have ISA, say Y, otherwise N.
2023
2024config EISA
2025 bool "EISA support"
2026 depends on ISA
2027 ---help---
2028 The Extended Industry Standard Architecture (EISA) bus was
2029 developed as an open alternative to the IBM MicroChannel bus.
2030
2031 The EISA bus provided some of the features of the IBM MicroChannel
2032 bus while maintaining backward compatibility with cards made for
2033 the older ISA bus. The EISA bus saw limited use between 1988 and
2034 1995 when it was made obsolete by the PCI bus.
2035
2036 Say Y here if you are building a kernel for an EISA-based machine.
2037
2038 Otherwise, say N.
2039
2040source "drivers/eisa/Kconfig"
2041
2042config MCA
Ingo Molnar72ee6eb2009-01-27 16:57:49 +01002043 bool "MCA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002044 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002045 MicroChannel Architecture is found in some IBM PS/2 machines and
2046 laptops. It is a bus system similar to PCI or ISA. See
2047 <file:Documentation/mca.txt> (and especially the web page given
2048 there) before attempting to build an MCA bus kernel.
2049
2050source "drivers/mca/Kconfig"
2051
2052config SCx200
2053 tristate "NatSemi SCx200 support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002054 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002055 This provides basic support for National Semiconductor's
2056 (now AMD's) Geode processors. The driver probes for the
2057 PCI-IDs of several on-chip devices, so its a good dependency
2058 for other scx200_* drivers.
2059
2060 If compiled as a module, the driver is named scx200.
2061
2062config SCx200HR_TIMER
2063 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
John Stultz592913e2010-07-13 17:56:20 -07002064 depends on SCx200
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002065 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002066 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002067 This driver provides a clocksource built upon the on-chip
2068 27MHz high-resolution timer. Its also a workaround for
2069 NSC Geode SC-1100's buggy TSC, which loses time when the
2070 processor goes idle (as is done by the scheduler). The
2071 other workaround is idle=poll boot option.
2072
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002073config OLPC
2074 bool "One Laptop Per Child support"
Thomas Gleixner54008972011-02-23 09:50:15 +01002075 depends on !X86_PAE
Andres Salomon3c554942009-12-14 18:00:36 -08002076 select GPIOLIB
Thomas Gleixnerdc3119e72011-02-23 10:08:31 +01002077 select OF
Daniel Drake45bb1672011-03-13 15:10:17 +00002078 select OF_PROMTREE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002079 ---help---
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002080 Add support for detecting the unique features of the OLPC
2081 XO hardware.
2082
Daniel Drakea3128582011-06-25 17:34:10 +01002083config OLPC_XO1_PM
2084 bool "OLPC XO-1 Power Management"
Daniel Drake97c4cb72011-06-25 17:34:11 +01002085 depends on OLPC && MFD_CS5535 && PM_SLEEP
Daniel Drakea3128582011-06-25 17:34:10 +01002086 select MFD_CORE
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002087 ---help---
Daniel Drake97c4cb72011-06-25 17:34:11 +01002088 Add support for poweroff and suspend of the OLPC XO-1 laptop.
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002089
Daniel Drakecfee9592011-06-25 17:34:17 +01002090config OLPC_XO1_RTC
2091 bool "OLPC XO-1 Real Time Clock"
2092 depends on OLPC_XO1_PM && RTC_DRV_CMOS
2093 ---help---
2094 Add support for the XO-1 real time clock, which can be used as a
2095 programmable wakeup source.
2096
Daniel Drake7feda8e2011-06-25 17:34:12 +01002097config OLPC_XO1_SCI
2098 bool "OLPC XO-1 SCI extras"
Daniel Draked8d01a62011-07-24 18:33:21 +01002099 depends on OLPC && OLPC_XO1_PM
2100 select POWER_SUPPLY
Daniel Drake7feda8e2011-06-25 17:34:12 +01002101 select GPIO_CS5535
2102 select MFD_CORE
2103 ---help---
2104 Add support for SCI-based features of the OLPC XO-1 laptop:
Daniel Drake7bc74b32011-06-25 17:34:14 +01002105 - EC-driven system wakeups
Daniel Drake7feda8e2011-06-25 17:34:12 +01002106 - Power button
Daniel Drake7bc74b32011-06-25 17:34:14 +01002107 - Ebook switch
Daniel Drake2cf2bae2011-06-25 17:34:15 +01002108 - Lid switch
Daniel Drakee1040ac2011-06-25 17:34:16 +01002109 - AC adapter status updates
2110 - Battery status updates
Daniel Drake7feda8e2011-06-25 17:34:12 +01002111
Daniel Drakea0f30f52011-06-25 17:34:18 +01002112config OLPC_XO15_SCI
2113 bool "OLPC XO-1.5 SCI extras"
Daniel Draked8d01a62011-07-24 18:33:21 +01002114 depends on OLPC && ACPI
2115 select POWER_SUPPLY
Daniel Drakea0f30f52011-06-25 17:34:18 +01002116 ---help---
2117 Add support for SCI-based features of the OLPC XO-1.5 laptop:
2118 - EC-driven system wakeups
2119 - AC adapter status updates
2120 - Battery status updates
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002121
Ed Wildgoosed4f3e352011-09-20 14:00:12 -07002122config ALIX
2123 bool "PCEngines ALIX System Support (LED setup)"
2124 select GPIOLIB
2125 ---help---
2126 This option enables system support for the PCEngines ALIX.
2127 At present this just sets up LEDs for GPIO control on
2128 ALIX2/3/6 boards. However, other system specific setup should
2129 get added here.
2130
2131 Note: You must still enable the drivers for GPIO and LED support
2132 (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs
2133
2134 Note: You have to set alix.force=1 for boards with Award BIOS.
2135
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002136endif # X86_32
2137
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +02002138config AMD_NB
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002139 def_bool y
Borislav Petkov0e152cd2010-03-12 15:43:03 +01002140 depends on CPU_SUP_AMD && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002141
2142source "drivers/pcmcia/Kconfig"
2143
2144source "drivers/pci/hotplug/Kconfig"
2145
Alexandre Bounine388b78a2011-03-23 16:43:03 -07002146config RAPIDIO
2147 bool "RapidIO support"
2148 depends on PCI
2149 default n
2150 help
2151 If you say Y here, the kernel will include drivers and
2152 infrastructure code to support RapidIO interconnect devices.
2153
2154source "drivers/rapidio/Kconfig"
2155
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002156endmenu
2157
2158
2159menu "Executable file formats / Emulations"
2160
2161source "fs/Kconfig.binfmt"
2162
2163config IA32_EMULATION
2164 bool "IA32 Emulation"
2165 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01002166 select COMPAT_BINFMT_ELF
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002167 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002168 Include code to run 32-bit programs under a 64-bit kernel. You should
2169 likely turn this on, unless you're 100% sure that you don't have any
2170 32-bit programs left.
2171
2172config IA32_AOUT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002173 tristate "IA32 a.out support"
2174 depends on IA32_EMULATION
2175 ---help---
2176 Support old a.out binaries in the 32bit emulation.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002177
2178config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002179 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002180 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002181
2182config COMPAT_FOR_U64_ALIGNMENT
2183 def_bool COMPAT
2184 depends on X86_64
2185
2186config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002187 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04002188 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002189
David Howellsee009e4a02011-03-07 15:06:20 +00002190config KEYS_COMPAT
2191 bool
2192 depends on COMPAT && KEYS
2193 default y
2194
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002195endmenu
2196
2197
Keith Packarde5beae12008-11-03 18:21:45 +01002198config HAVE_ATOMIC_IOMAP
2199 def_bool y
2200 depends on X86_32
2201
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +09002202config HAVE_TEXT_POKE_SMP
2203 bool
2204 select STOP_MACHINE if SMP
2205
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002206source "net/Kconfig"
2207
2208source "drivers/Kconfig"
2209
2210source "drivers/firmware/Kconfig"
2211
2212source "fs/Kconfig"
2213
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002214source "arch/x86/Kconfig.debug"
2215
2216source "security/Kconfig"
2217
2218source "crypto/Kconfig"
2219
Avi Kivityedf88412007-12-16 11:02:48 +02002220source "arch/x86/kvm/Kconfig"
2221
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002222source "lib/Kconfig"