blob: 37357a599dcac02e4407467e844bbac0d9e8d224 [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
Peter Zijlstracc2067a2010-11-16 21:49:01 +010023 select HAVE_PERF_EVENTS
Peter Zijlstrae360adb2010-10-14 14:01:34 +080024 select HAVE_IRQ_WORK
Rik van Riel28b2ee22008-07-23 21:27:05 -070025 select HAVE_IOREMAP_PROT
Mathieu Desnoyers3f550092008-02-02 15:10:35 -050026 select HAVE_KPROBES
Yinghai Lu72d7c3b2010-08-25 13:39:17 -070027 select HAVE_MEMBLOCK
Ingo Molnar1f972762008-07-26 13:52:50 +020028 select ARCH_WANT_OPTIONAL_GPIOLIB
Ingo Molnarda4276b2009-01-07 11:05:10 +010029 select ARCH_WANT_FRAME_POINTERS
FUJITA Tomonori7c095e42009-06-17 16:28:12 -070030 select HAVE_DMA_ATTRS
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080031 select HAVE_KRETPROBES
Masami Hiramatsuc0f7ac32010-02-25 08:34:46 -050032 select HAVE_OPTPROBES
Steven Rostedte4b2b882008-08-14 15:45:11 -040033 select HAVE_FTRACE_MCOUNT_RECORD
Steven Rostedtcf4db252010-10-14 23:32:44 -040034 select HAVE_C_RECORDMCOUNT
Steven Rostedt677aa9f2008-05-17 00:01:36 -040035 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -040036 select HAVE_FUNCTION_TRACER
Frederic Weisbecker48d68b22008-12-02 00:20:39 +010037 select HAVE_FUNCTION_GRAPH_TRACER
Steven Rostedt71e308a2009-06-18 12:45:08 -040038 select HAVE_FUNCTION_GRAPH_FP_TEST
Steven Rostedt60a7ecf2008-11-05 16:05:44 -050039 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
Steven Rostedt9a5fd902009-02-06 01:14:26 -050040 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
Josh Stone66700002009-08-24 14:43:11 -070041 select HAVE_SYSCALL_TRACEPOINTS
Ingo Molnare0ec9482009-01-27 17:01:14 +010042 select HAVE_KVM
Ingo Molnar49793b02009-01-27 17:02:29 +010043 select HAVE_ARCH_KGDB
Roland McGrath99bbc4b2008-04-20 14:35:12 -070044 select HAVE_ARCH_TRACEHOOK
Dmitry Baryshkov323ec002008-06-29 14:19:31 +040045 select HAVE_GENERIC_DMA_COHERENT if X86_32
Johannes Berg58340a02008-07-25 01:45:33 -070046 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Török Edwin8d264872008-11-23 12:39:08 +020047 select USER_STACKTRACE_SUPPORT
Heiko Carstensf850c30c2010-02-10 17:25:17 +010048 select HAVE_REGS_AND_STACK_ACCESS_API
Joerg Roedel2118d0c2009-01-09 15:13:15 +010049 select HAVE_DMA_API_DEBUG
H. Peter Anvin2e9f3bd2009-01-04 15:41:25 -080050 select HAVE_KERNEL_GZIP
51 select HAVE_KERNEL_BZIP2
52 select HAVE_KERNEL_LZMA
Lasse Collin30314802011-01-12 17:01:24 -080053 select HAVE_KERNEL_XZ
Albin Tonnerre13510992010-01-08 14:42:45 -080054 select HAVE_KERNEL_LZO
K.Prasad0067f122009-06-01 23:43:57 +053055 select HAVE_HW_BREAKPOINT
Frederic Weisbecker01027522010-04-11 18:55:56 +020056 select HAVE_MIXED_BREAKPOINTS_REGS
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010057 select PERF_EVENTS
Frederic Weisbeckerc01d4322010-05-15 22:57:48 +020058 select HAVE_PERF_EVENTS_NMI
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010059 select ANON_INODES
Pekka Enberg0a4af3b2009-02-26 21:38:56 +020060 select HAVE_ARCH_KMEMCHECK
Avi Kivity7c68af62009-09-19 09:40:22 +030061 select HAVE_USER_RETURN_NOTIFIER
Steven Rostedt46eb3b62010-09-22 23:10:23 -040062 select HAVE_ARCH_JUMP_LABEL
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +090063 select HAVE_TEXT_POKE_SMP
Thomas Gleixner3bb98082010-09-27 12:46:02 +000064 select HAVE_GENERIC_HARDIRQS
65 select HAVE_SPARSE_IRQ
Jan Beulichc49aa5b2011-03-08 09:24:26 +000066 select GENERIC_FIND_FIRST_BIT
Thomas Gleixner3bb98082010-09-27 12:46:02 +000067 select GENERIC_IRQ_PROBE
68 select GENERIC_PENDING_IRQ if SMP
Thomas Gleixner517e4982010-12-16 17:59:57 +010069 select GENERIC_IRQ_SHOW
Thomas Gleixnerc01858082011-02-07 02:24:08 +010070 select IRQ_FORCED_THREADING
Amerigo Wang351f8f82011-01-12 16:59:39 -080071 select USE_GENERIC_SMP_HELPERS if SMP
Randy Dunlap9cddf152011-05-04 11:06:05 -070072 select HAVE_BPF_JIT if (X86_64 && NET)
Balbir Singh7d8330a2008-02-10 12:46:28 +053073
Ingo Molnarba7e4d12009-06-06 13:58:12 +020074config INSTRUCTION_DECODER
75 def_bool (KPROBES || PERF_EVENTS)
76
Linus Torvalds51b26ad2009-04-26 10:12:47 -070077config OUTPUT_FORMAT
78 string
79 default "elf32-i386" if X86_32
80 default "elf64-x86-64" if X86_64
81
Sam Ravnborg73531902008-05-25 23:03:18 +020082config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020083 string
Sam Ravnborg73531902008-05-25 23:03:18 +020084 default "arch/x86/configs/i386_defconfig" if X86_32
85 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020086
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010087config GENERIC_CMOS_UPDATE
Harvey Harrison3c2362e2008-01-30 13:31:03 +010088 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010089
90config CLOCKSOURCE_WATCHDOG
Harvey Harrison3c2362e2008-01-30 13:31:03 +010091 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010092
93config GENERIC_CLOCKEVENTS
Harvey Harrison3c2362e2008-01-30 13:31:03 +010094 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010095
96config GENERIC_CLOCKEVENTS_BROADCAST
Harvey Harrison3c2362e2008-01-30 13:31:03 +010097 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010098 depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
99
100config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100101 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100102
103config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100104 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100105
Heiko Carstensaa7d9352008-02-01 17:45:14 +0100106config HAVE_LATENCYTOP_SUPPORT
107 def_bool y
108
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100109config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100110 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100111
112config ZONE_DMA
David Rientjesdc382fd2011-05-16 13:54:10 -0700113 bool "DMA memory allocation support" if EXPERT
114 default y
115 help
116 DMA memory allocation support allows devices with less than 32-bit
117 addressing to allocate within the first 16MB of address space.
118 Disable if no such devices will be used.
119
120 If unsure, say Y.
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100121
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100122config SBUS
123 bool
124
FUJITA Tomonori3bc4e452010-03-10 15:23:22 -0800125config NEED_DMA_MAP_STATE
126 def_bool (X86_64 || DMAR || DMA_API_DEBUG)
127
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700128config NEED_SG_DMA_LENGTH
Andrew Morton4a14d842010-05-26 14:44:33 -0700129 def_bool y
FUJITA Tomonori18e98302010-05-26 14:44:32 -0700130
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100131config GENERIC_ISA_DMA
David Rientjes1c00f012011-03-22 16:34:59 -0700132 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100133
134config GENERIC_IOMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100135 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100136
137config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100138 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100139 depends on BUG
Jan Beulichb93a5312008-12-16 11:40:27 +0000140 select GENERIC_BUG_RELATIVE_POINTERS if X86_64
141
142config GENERIC_BUG_RELATIVE_POINTERS
143 bool
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100144
145config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100146 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100147
Florian Fainellia6082952008-01-30 13:33:35 +0100148config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -0700149 bool
Florian Fainellia6082952008-01-30 13:33:35 +0100150
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100151config ARCH_MAY_HAVE_PC_FDC
David Rientjes8df3bd92011-03-22 16:34:58 -0700152 def_bool ISA_DMA_API
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100153
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100154config RWSEM_GENERIC_SPINLOCK
155 def_bool !X86_XADD
156
157config RWSEM_XCHGADD_ALGORITHM
158 def_bool X86_XADD
159
Venki Pallipadia6869cc2008-02-08 17:05:44 -0800160config ARCH_HAS_CPU_IDLE_WAIT
161 def_bool y
162
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100163config GENERIC_CALIBRATE_DELAY
164 def_bool y
165
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100166config GENERIC_TIME_VSYSCALL
167 bool
168 default X86_64
169
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800170config ARCH_HAS_CPU_RELAX
171 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100172
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400173config ARCH_HAS_DEFAULT_IDLE
174 def_bool y
175
Pekka Enberg1b27d052008-04-28 02:12:22 -0700176config ARCH_HAS_CACHE_LINE_SIZE
177 def_bool y
178
Mike Travisdd5af902008-01-30 13:33:32 +0100179config HAVE_SETUP_PER_CPU_AREA
Brian Gerst89c9c4c2009-01-27 12:56:48 +0900180 def_bool y
travis@sgi.comb32ef632008-01-30 13:32:51 +0100181
Tejun Heo08fc4582009-08-14 15:00:49 +0900182config NEED_PER_CPU_EMBED_FIRST_CHUNK
183 def_bool y
184
185config NEED_PER_CPU_PAGE_FIRST_CHUNK
Tejun Heo11124412009-02-20 16:29:09 +0900186 def_bool y
187
Mike Travis9f0e8d02008-04-04 18:11:01 -0700188config HAVE_CPUMASK_OF_CPU_MAP
189 def_bool X86_64_SMP
190
Johannes Berg801e4062007-12-08 02:12:39 +0100191config ARCH_HIBERNATION_POSSIBLE
192 def_bool y
Johannes Berg801e4062007-12-08 02:12:39 +0100193
Johannes Bergf4cb5702007-12-08 02:14:00 +0100194config ARCH_SUSPEND_POSSIBLE
195 def_bool y
Johannes Bergf4cb5702007-12-08 02:14:00 +0100196
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100197config ZONE_DMA32
198 bool
199 default X86_64
200
201config ARCH_POPULATES_NODE_MAP
202 def_bool y
203
204config AUDIT_ARCH
205 bool
206 default X86_64
207
Ingo Molnar765c68b2008-04-09 11:03:37 +0200208config ARCH_SUPPORTS_OPTIMIZED_INLINING
209 def_bool y
210
Akinobu Mita6a11f752009-03-31 15:23:17 -0700211config ARCH_SUPPORTS_DEBUG_PAGEALLOC
212 def_bool y
213
Shane Wang69575d32009-09-01 18:25:07 -0700214config HAVE_INTEL_TXT
215 def_bool y
216 depends on EXPERIMENTAL && DMAR && ACPI
217
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100218config X86_32_SMP
219 def_bool y
220 depends on X86_32 && SMP
221
222config X86_64_SMP
223 def_bool y
224 depends on X86_64 && SMP
225
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100226config X86_HT
Jan Beulich6fc108a2010-04-21 15:23:44 +0100227 def_bool y
Adrian Bunkee0011a2007-12-04 17:19:07 +0100228 depends on SMP
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100229
Tejun Heoccbeed32009-02-09 22:17:40 +0900230config X86_32_LAZY_GS
231 def_bool y
Tejun Heo60a53172009-02-09 22:17:40 +0900232 depends on X86_32 && !CC_STACKPROTECTOR
Tejun Heoccbeed32009-02-09 22:17:40 +0900233
Borislav Petkovd61931d2010-03-05 17:34:46 +0100234config ARCH_HWEIGHT_CFLAGS
235 string
236 default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
237 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
238
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100239config KTIME_SCALAR
240 def_bool X86_32
Borislav Petkovd7c53c92010-08-19 20:10:29 +0200241
242config ARCH_CPU_PROBE_RELEASE
243 def_bool y
244 depends on HOTPLUG_CPU
245
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100246source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700247source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100248
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100249menu "Processor type and features"
250
251source "kernel/time/Kconfig"
252
253config SMP
254 bool "Symmetric multi-processing support"
255 ---help---
256 This enables support for systems with more than one CPU. If you have
257 a system with only one CPU, like most personal computers, say N. If
258 you have a system with more than one CPU, say Y.
259
260 If you say N here, the kernel will run on single and multiprocessor
261 machines, but will use only one CPU of a multiprocessor machine. If
262 you say Y here, the kernel will run on many, but not all,
263 singleprocessor machines. On a singleprocessor machine, the kernel
264 will run faster if you say N here.
265
266 Note that if you say Y here and choose architecture "586" or
267 "Pentium" under "Processor family", the kernel will not work on 486
268 architectures. Similarly, multiprocessor kernels for the "PPro"
269 architecture may not work on all Pentium based boards.
270
271 People using multiprocessor machines who say Y here should also say
272 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
273 Management" code will be disabled if you say Y here.
274
Adrian Bunk03502fa2008-02-03 15:50:21 +0200275 See also <file:Documentation/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100276 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
277 <http://www.tldp.org/docs.html#howto>.
278
279 If you don't know what to do here, say N.
280
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800281config X86_X2APIC
282 bool "Support x2apic"
David Woodhousef7d7f862009-04-06 23:04:40 -0700283 depends on X86_LOCAL_APIC && X86_64 && INTR_REMAP
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800284 ---help---
285 This enables x2apic support on CPUs that have this feature.
286
287 This allows 32-bit apic IDs (so it can support very large systems),
288 and accesses the local apic via MSRs not via mmio.
289
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800290 If you don't know what to do here, say N.
291
Yinghai Lu6695c852008-06-19 12:13:09 -0700292config X86_MPPARSE
Jan Beulich7a527682008-10-30 10:38:24 +0000293 bool "Enable MPS table" if ACPI
294 default y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200295 depends on X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100296 ---help---
Yinghai Lu6695c852008-06-19 12:13:09 -0700297 For old smp systems that do not have proper acpi support. Newer systems
298 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
Yinghai Lu6695c852008-06-19 12:13:09 -0700299
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800300config X86_BIGSMP
301 bool "Support for big SMP systems with more than 8 CPUs"
302 depends on X86_32 && SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100303 ---help---
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800304 This option is needed for the systems that have more than 8 CPUs
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100305
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800306if X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800307config X86_EXTENDED_PLATFORM
308 bool "Support for extended (non-PC) x86 platforms"
309 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100310 ---help---
Ingo Molnar06ac8342009-01-27 18:11:43 +0100311 If you disable this option then the kernel will only support
312 standard PC platforms. (which covers the vast majority of
313 systems out there.)
314
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800315 If you enable this option then you'll be able to select support
316 for the following (non-PC) 32 bit x86 platforms:
317 AMD Elan
318 NUMAQ (IBM/Sequent)
319 RDC R-321x SoC
320 SGI 320/540 (Visual Workstation)
321 Summit/EXA (IBM x440)
322 Unisys ES7000 IA32 series
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200323 Moorestown MID devices
Ingo Molnar06ac8342009-01-27 18:11:43 +0100324
325 If you have one of these systems, or if you want to build a
326 generic distribution kernel, say Y here - otherwise say N.
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800327endif
Ingo Molnar06ac8342009-01-27 18:11:43 +0100328
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800329if X86_64
330config X86_EXTENDED_PLATFORM
331 bool "Support for extended (non-PC) x86 platforms"
332 default y
333 ---help---
334 If you disable this option then the kernel will only support
335 standard PC platforms. (which covers the vast majority of
336 systems out there.)
337
338 If you enable this option then you'll be able to select support
339 for the following (non-PC) 64 bit x86 platforms:
340 ScaleMP vSMP
341 SGI Ultraviolet
342
343 If you have one of these systems, or if you want to build a
344 generic distribution kernel, say Y here - otherwise say N.
345endif
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800346# This is an alphabetically sorted list of 64 bit extended platforms
347# Please maintain the alphabetic order if and when there are additions
Nick Piggin03b48632009-01-20 04:36:04 +0100348
Ingo Molnar6a485652009-01-27 18:29:13 +0100349config X86_VSMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800350 bool "ScaleMP vSMP"
Randy Dunlap03f1a172010-10-13 21:00:23 -0700351 select PARAVIRT_GUEST
Ingo Molnar6a485652009-01-27 18:29:13 +0100352 select PARAVIRT
353 depends on X86_64 && PCI
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800354 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100355 ---help---
Ingo Molnar6a485652009-01-27 18:29:13 +0100356 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
357 supposed to run on these EM64T-based machines. Only choose this option
358 if you have one of these machines.
359
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800360config X86_UV
361 bool "SGI Ultraviolet"
362 depends on X86_64
363 depends on X86_EXTENDED_PLATFORM
Jack Steiner54c28d22009-04-03 15:39:42 -0500364 depends on NUMA
Suresh Siddha9d6c26e2009-04-20 13:02:31 -0700365 depends on X86_X2APIC
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800366 ---help---
367 This option is needed in order to support SGI Ultraviolet systems.
368 If you don't have one of these, you should say N here.
369
370# Following is an alphabetically sorted list of 32 bit extended platforms
371# Please maintain the alphabetic order if and when there are additions
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100372
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800373config X86_INTEL_CE
374 bool "CE4100 TV platform"
375 depends on PCI
376 depends on PCI_GODIRECT
377 depends on X86_32
378 depends on X86_EXTENDED_PLATFORM
Dirk Brandewie37bc9f52010-11-09 12:08:08 -0800379 select X86_REBOOTFIXUPS
Sebastian Andrzej Siewiorda6b7372011-02-22 21:07:37 +0100380 select OF
381 select OF_EARLY_FLATTREE
Thomas Gleixnerc751e172010-11-09 12:08:04 -0800382 ---help---
383 Select for the Intel CE media processor (CE4100) SOC.
384 This option compiles in support for the CE4100 SOC for settop
385 boxes and media devices.
386
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200387config X86_MRST
388 bool "Moorestown MID platform"
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800389 depends on PCI
390 depends on PCI_GOANY
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200391 depends on X86_32
392 depends on X86_EXTENDED_PLATFORM
Jacob Pan4b2f3f72010-02-25 10:02:14 -0800393 depends on X86_IO_APIC
Jacob Panbb24c472009-09-02 07:37:17 -0700394 select APB_TIMER
Feng Tang1da4b1c2010-11-09 11:22:58 +0000395 select I2C
396 select SPI
Alan Coxb9fc71f2010-11-15 17:31:19 +0000397 select INTEL_SCU_IPC
Randy Dunlapad025192010-11-15 10:14:06 -0800398 select X86_PLATFORM_DEVICES
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200399 ---help---
400 Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
401 Internet Device(MID) platform. Moorestown consists of two chips:
402 Lincroft (CPU core, graphics, and memory controller) and Langwell IOH.
403 Unlike standard x86 PCs, Moorestown does not have many legacy devices
404 nor standard legacy replacement devices/features. e.g. Moorestown does
405 not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
406
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800407config X86_RDC321X
408 bool "RDC R-321x SoC"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100409 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800410 depends on X86_EXTENDED_PLATFORM
411 select M486
412 select X86_REBOOTFIXUPS
413 ---help---
414 This option is needed for RDC R-321x system-on-chip, also known
415 as R-8610-(G).
416 If you don't have one of these chips, you should say N here.
417
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100418config X86_32_NON_STANDARD
Ingo Molnar9c398012009-01-27 18:24:57 +0100419 bool "Support non-standard 32-bit SMP architectures"
420 depends on X86_32 && SMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800421 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100422 ---help---
423 This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
Yinghai Lud49c4282008-06-08 18:31:54 -0700424 subarchitectures. It is intended for a generic binary kernel.
425 if you select them all, kernel will probe it one by one. and will
426 fallback to default.
427
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800428# Alphabetically sorted list of Non standard 32 bit platforms
Yinghai Lud49c4282008-06-08 18:31:54 -0700429
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100430config X86_NUMAQ
431 bool "NUMAQ (IBM/Sequent)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100432 depends on X86_32_NON_STANDARD
Pan, Jacob juna92d1522010-02-24 16:59:55 -0800433 depends on PCI
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100434 select NUMA
Ingo Molnar9c398012009-01-27 18:24:57 +0100435 select X86_MPPARSE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100436 ---help---
Yinghai Lud49c4282008-06-08 18:31:54 -0700437 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
438 NUMA multiquad box. This changes the way that processors are
439 bootstrapped, and uses Clustered Logical APIC addressing mode instead
440 of Flat Logical. You will need a new lynxer.elf file to flash your
441 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100442
Linus Torvaldsd949f362009-09-26 09:35:07 -0700443config X86_SUPPORTS_MEMORY_FAILURE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100444 def_bool y
Linus Torvaldsd949f362009-09-26 09:35:07 -0700445 # MCE code calls memory_failure():
446 depends on X86_MCE
447 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
448 depends on !X86_NUMAQ
449 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
450 depends on X86_64 || !SPARSEMEM
451 select ARCH_SUPPORTS_MEMORY_FAILURE
Linus Torvaldsd949f362009-09-26 09:35:07 -0700452
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200453config X86_VISWS
454 bool "SGI 320/540 (Visual Workstation)"
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800455 depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
456 depends on X86_32_NON_STANDARD
457 ---help---
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200458 The SGI Visual Workstation series is an IA32-based workstation
459 based on SGI systems chips with some legacy PC hardware attached.
460
461 Say Y here to create a kernel to run on the SGI 320 or 540.
462
463 A kernel compiled for the Visual Workstation will run on general
464 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
465
Ingo Molnar9c398012009-01-27 18:24:57 +0100466config X86_SUMMIT
467 bool "Summit/EXA (IBM x440)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100468 depends on X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100469 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100470 This option is needed for IBM systems that use the Summit/EXA chipset.
471 In particular, it is needed for the x440.
Ingo Molnar1f972762008-07-26 13:52:50 +0200472
Ingo Molnar9c398012009-01-27 18:24:57 +0100473config X86_ES7000
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800474 bool "Unisys ES7000 IA32 series"
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800475 depends on X86_32_NON_STANDARD && X86_BIGSMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100476 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100477 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
478 supposed to run on an IA32-based Unisys ES7000 system.
479
Shérab82148d12010-09-25 06:06:57 +0200480config X86_32_IRIS
481 tristate "Eurobraille/Iris poweroff module"
482 depends on X86_32
483 ---help---
484 The Iris machines from EuroBraille do not have APM or ACPI support
485 to shut themselves down properly. A special I/O sequence is
486 needed to do so, which is what this module does at
487 kernel shutdown.
488
489 This is only for Iris machines from EuroBraille.
490
491 If unused, say N.
492
Ingo Molnarae1e9132008-11-11 09:05:16 +0100493config SCHED_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100494 def_bool y
495 prompt "Single-depth WCHAN output"
Ken Chena87d0912008-11-06 11:10:49 -0800496 depends on X86
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100497 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100498 Calculate simpler /proc/<PID>/wchan values. If this option
499 is disabled then wchan values will recurse back to the
500 caller function. This provides more accurate wchan values,
501 at the expense of slightly more scheduling overhead.
502
503 If in doubt, say "Y".
504
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100505menuconfig PARAVIRT_GUEST
506 bool "Paravirtualized guest support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100507 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100508 Say Y here to get to see options related to running Linux under
509 various hypervisors. This option alone does not add any kernel code.
510
511 If you say N, all options in this submenu will be skipped and disabled.
512
513if PARAVIRT_GUEST
514
515source "arch/x86/xen/Kconfig"
516
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200517config KVM_CLOCK
518 bool "KVM paravirtualized clock"
519 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200520 select PARAVIRT_CLOCK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100521 ---help---
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200522 Turning on this option will allow you to run a paravirtualized clock
523 when running over the KVM hypervisor. Instead of relying on a PIT
524 (or probably other) emulation by the underlying device model, the host
525 provides the guest with timing infrastructure such as time of day, and
526 system time
527
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500528config KVM_GUEST
529 bool "KVM Guest support"
530 select PARAVIRT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100531 ---help---
532 This option enables various optimizations for running under the KVM
533 hypervisor.
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500534
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100535source "arch/x86/lguest/Kconfig"
536
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100537config PARAVIRT
538 bool "Enable paravirtualization code"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100539 ---help---
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100540 This changes the kernel so it can modify itself when it is run
541 under a hypervisor, potentially improving performance significantly
542 over full virtualization. However, when run without a hypervisor
543 the kernel is theoretically slower and slightly larger.
544
Jeremy Fitzhardingeb4ecc122009-05-13 17:16:55 -0700545config PARAVIRT_SPINLOCKS
546 bool "Paravirtualization layer for spinlocks"
547 depends on PARAVIRT && SMP && EXPERIMENTAL
548 ---help---
549 Paravirtualized spinlocks allow a pvops backend to replace the
550 spinlock implementation with something virtualization-friendly
551 (for example, block the virtual CPU rather than spinning).
552
553 Unfortunately the downside is an up to 5% performance hit on
554 native kernels, with various workloads.
555
556 If you are unsure how to answer this question, answer N.
557
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200558config PARAVIRT_CLOCK
559 bool
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200560
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100561endif
562
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400563config PARAVIRT_DEBUG
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100564 bool "paravirt-ops debugging"
565 depends on PARAVIRT && DEBUG_KERNEL
566 ---help---
567 Enable to debug paravirt_ops internals. Specifically, BUG if
568 a paravirt_op is missing when it is called.
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400569
Yinghai Lu08677212010-02-10 01:20:20 -0800570config NO_BOOTMEM
Yinghai Lu774ea0b2010-08-25 13:39:18 -0700571 def_bool y
Yinghai Lu08677212010-02-10 01:20:20 -0800572
Yinghai Lu03273182008-04-18 17:49:15 -0700573config MEMTEST
574 bool "Memtest"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100575 ---help---
Yinghai Luc64df702008-03-21 18:56:19 -0700576 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700577 to be set.
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100578 memtest=0, mean disabled; -- default
579 memtest=1, mean do 1 test pattern;
580 ...
581 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200582 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100583
584config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100585 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100586 depends on X86_32 && NUMA && X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100587
588config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100589 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100590 depends on X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100591
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100592source "arch/x86/Kconfig.cpu"
593
594config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100595 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100596 prompt "HPET Timer Support" if X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100597 ---help---
598 Use the IA-PC HPET (High Precision Event Timer) to manage
599 time in preference to the PIT and RTC, if a HPET is
600 present.
601 HPET is the next generation timer replacing legacy 8254s.
602 The HPET provides a stable time base on SMP
603 systems, unlike the TSC, but it is more expensive to access,
604 as it is off-chip. You can find the HPET spec at
605 <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100606
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100607 You can safely choose Y here. However, HPET will only be
608 activated if the platform and the BIOS support this feature.
609 Otherwise the 8254 will be used for timing services.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100610
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100611 Choose N to continue using the legacy 8254 timer.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100612
613config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100614 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800615 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100616
Jacob Panbb24c472009-09-02 07:37:17 -0700617config APB_TIMER
618 def_bool y if MRST
619 prompt "Langwell APB Timer Support" if X86_MRST
620 help
621 APB timer is the replacement for 8254, HPET on X86 MID platforms.
622 The APBT provides a stable time base on SMP
623 systems, unlike the TSC, but it is more expensive to access,
624 as it is off-chip. APB timers are always running regardless of CPU
625 C states, they are used as per CPU clockevent device when possible.
626
David Rientjes6a108a12011-01-20 14:44:16 -0800627# Mark as expert because too many people got it wrong.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100628# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700629config DMI
630 default y
David Rientjes6a108a12011-01-20 14:44:16 -0800631 bool "Enable DMI scanning" if EXPERT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100632 ---help---
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700633 Enabled scanning of DMI to identify machine quirks. Say Y
634 here unless you have verified that your setup is not
635 affected by entries in the DMI blacklist. Required by PNP
636 BIOS code.
637
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100638config GART_IOMMU
David Rientjes6a108a12011-01-20 14:44:16 -0800639 bool "GART IOMMU support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100640 default y
641 select SWIOTLB
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +0200642 depends on X86_64 && PCI && AMD_NB
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100643 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100644 Support for full DMA access of devices with 32bit memory access only
645 on systems with more than 3GB. This is usually needed for USB,
646 sound, many IDE/SATA chipsets and some other devices.
647 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
648 based hardware IOMMU and a software bounce buffer based IOMMU used
649 on Intel systems and as fallback.
650 The code is only active when needed (enough memory and limited
651 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
652 too.
653
654config CALGARY_IOMMU
655 bool "IBM Calgary IOMMU support"
656 select SWIOTLB
657 depends on X86_64 && PCI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100658 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100659 Support for hardware IOMMUs in IBM's xSeries x366 and x460
660 systems. Needed to run systems with more than 3GB of memory
661 properly with 32-bit PCI devices that do not support DAC
662 (Double Address Cycle). Calgary also supports bus level
663 isolation, where all DMAs pass through the IOMMU. This
664 prevents them from going anywhere except their intended
665 destination. This catches hard-to-find kernel bugs and
666 mis-behaving drivers and devices that do not use the DMA-API
667 properly to set up their DMA buffers. The IOMMU can be
668 turned off at boot time with the iommu=off parameter.
669 Normally the kernel will make the right choice by itself.
670 If unsure, say Y.
671
672config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100673 def_bool y
674 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100675 depends on CALGARY_IOMMU
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100676 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100677 Should Calgary be enabled by default? if you choose 'y', Calgary
678 will be used (if it exists). If you choose 'n', Calgary will not be
679 used even if it exists. If you choose 'n' and would like to use
680 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
681 If unsure, say Y.
682
Joerg Roedel2b188722008-06-26 21:27:37 +0200683config AMD_IOMMU
684 bool "AMD IOMMU support"
Ingo Molnar07c40e82008-06-27 11:31:28 +0200685 select SWIOTLB
Joerg Roedela80dc3e2008-09-11 16:51:41 +0200686 select PCI_MSI
Joerg Roedel9844b4e2011-04-05 09:22:56 +0200687 select PCI_IOV
Ingo Molnar24d2ba02008-06-27 10:37:03 +0200688 depends on X86_64 && PCI && ACPI
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100689 ---help---
Joerg Roedel18d22202008-07-03 19:35:06 +0200690 With this option you can enable support for AMD IOMMU hardware in
691 your system. An IOMMU is a hardware component which provides
692 remapping of DMA memory accesses from devices. With an AMD IOMMU you
693 can isolate the the DMA memory of different devices and protect the
694 system from misbehaving device drivers or hardware.
695
696 You can find out if your system has an AMD IOMMU if you look into
697 your BIOS for an option to enable it or if you have an IVRS ACPI
698 table.
Joerg Roedel2b188722008-06-26 21:27:37 +0200699
Joerg Roedel2e117602008-12-11 19:00:12 +0100700config AMD_IOMMU_STATS
701 bool "Export AMD IOMMU statistics to debugfs"
702 depends on AMD_IOMMU
703 select DEBUG_FS
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100704 ---help---
Joerg Roedel2e117602008-12-11 19:00:12 +0100705 This option enables code in the AMD IOMMU driver to collect various
706 statistics about whats happening in the driver and exports that
707 information to userspace via debugfs.
708 If unsure, say N.
709
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100710# need this always selected by IOMMU for the VIA workaround
711config SWIOTLB
Joerg Roedela1afd012008-11-18 12:44:21 +0100712 def_bool y if X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100713 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100714 Support for software bounce buffers used on x86-64 systems
715 which don't have a hardware IOMMU (e.g. the current generation
716 of Intel's x86-64 CPUs). Using this PCI devices which can only
717 access 32-bits of memory can be used on systems with more than
718 3 GB of memory. If unsure, say Y.
719
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700720config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900721 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700722
Joerg Roedel1aaf1182008-11-26 17:25:13 +0100723config IOMMU_API
724 def_bool (AMD_IOMMU || DMAR)
725
Mike Travis1184dc22008-05-12 21:21:12 +0200726config MAXSMP
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200727 bool "Enable Maximum number of SMP Processors and NUMA Nodes"
Mike Travis36f51012008-12-16 17:33:51 -0800728 depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
729 select CPUMASK_OFFSTACK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100730 ---help---
Samuel Thibaultddb0c5a2010-08-21 21:32:41 +0200731 Enable maximum number of CPUS and NUMA Nodes for this architecture.
Mike Travis1184dc22008-05-12 21:21:12 +0200732 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100733
734config NR_CPUS
Mike Travis36f51012008-12-16 17:33:51 -0800735 int "Maximum number of CPUs" if SMP && !MAXSMP
Michael K. Johnson2a3313f2009-04-21 21:44:48 -0400736 range 2 8 if SMP && X86_32 && !X86_BIGSMP
Mike Travis36f51012008-12-16 17:33:51 -0800737 range 2 512 if SMP && !MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800738 default "1" if !SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700739 default "4096" if MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800740 default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
741 default "8" if SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100742 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100743 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700744 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100745 minimum value which makes sense is 2.
746
747 This is purely to save memory - each supported CPU adds
748 approximately eight kilobytes to the kernel image.
749
750config SCHED_SMT
751 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800752 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100753 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100754 SMT scheduler support improves the CPU scheduler's decision making
755 when dealing with Intel Pentium 4 chips with HyperThreading at a
756 cost of slightly increased overhead in some places. If unsure say
757 N here.
758
759config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100760 def_bool y
761 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800762 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100763 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100764 Multi-core scheduler support improves the CPU scheduler's decision
765 making when dealing with multi-core CPU chips at a cost of slightly
766 increased overhead in some places. If unsure say N here.
767
Venkatesh Pallipadie82b8e42010-10-04 17:03:20 -0700768config IRQ_TIME_ACCOUNTING
769 bool "Fine granularity task level IRQ time accounting"
770 default n
771 ---help---
772 Select this option to enable fine granularity task irq time
773 accounting. This is done by reading a timestamp on each
774 transitions between softirq and hardirq state, so there can be a
775 small performance impact.
776
777 If in doubt, say N here.
778
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100779source "kernel/Kconfig.preempt"
780
781config X86_UP_APIC
782 bool "Local APIC support on uniprocessors"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100783 depends on X86_32 && !SMP && !X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100784 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100785 A local APIC (Advanced Programmable Interrupt Controller) is an
786 integrated interrupt controller in the CPU. If you have a single-CPU
787 system which has a processor with a local APIC, you can say Y here to
788 enable and use it. If you say Y here even though your machine doesn't
789 have a local APIC, then the kernel will still run with no slowdown at
790 all. The local APIC supports CPU-generated self-interrupts (timer,
791 performance counters), and the NMI watchdog which detects hard
792 lockups.
793
794config X86_UP_IOAPIC
795 bool "IO-APIC support on uniprocessors"
796 depends on X86_UP_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100797 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100798 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
799 SMP-capable replacement for PC-style interrupt controllers. Most
800 SMP systems and many recent uniprocessor systems have one.
801
802 If you have a single-CPU system with an IO-APIC, you can say Y here
803 to use it. If you say Y here even though your machine doesn't have
804 an IO-APIC, then the kernel will still run with no slowdown at all.
805
806config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100807 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100808 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100809
810config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100811 def_bool y
Henrik Kretzschmar1444e0c2011-02-22 15:38:07 +0100812 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100813
814config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100815 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100816 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100817
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200818config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
819 bool "Reroute for broken boot IRQs"
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200820 depends on X86_IO_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100821 ---help---
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200822 This option enables a workaround that fixes a source of
823 spurious interrupts. This is recommended when threaded
824 interrupt handling is used on systems where the generation of
825 superfluous "boot interrupts" cannot be disabled.
826
827 Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
828 entry in the chipset's IO-APIC is masked (as, e.g. the RT
829 kernel does during interrupt handling). On chipsets where this
830 boot IRQ generation cannot be disabled, this workaround keeps
831 the original IRQ line masked so that only the equivalent "boot
832 IRQ" is delivered to the CPUs. The workaround also tells the
833 kernel to set up the IRQ handler on the boot IRQ line. In this
834 way only one interrupt is delivered to the kernel. Otherwise
835 the spurious second interrupt may cause the kernel to bring
836 down (vital) interrupt lines.
837
838 Only affects "broken" chipsets. Interrupt sharing may be
839 increased on these systems.
840
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100841config X86_MCE
Andi Kleenbab9bc62009-07-09 00:31:38 +0200842 bool "Machine Check / overheating reporting"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100843 ---help---
Andi Kleenbab9bc62009-07-09 00:31:38 +0200844 Machine Check support allows the processor to notify the
845 kernel if it detects a problem (e.g. overheating, data corruption).
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100846 The action the kernel takes depends on the severity of the problem,
Andi Kleenbab9bc62009-07-09 00:31:38 +0200847 ranging from warning messages to halting the machine.
Andi Kleen4efc0672009-04-28 19:07:31 +0200848
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100849config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100850 def_bool y
851 prompt "Intel MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200852 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100853 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100854 Additional support for intel specific MCE features such as
855 the thermal monitor.
856
857config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100858 def_bool y
859 prompt "AMD MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200860 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100861 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100862 Additional support for AMD specific MCE features such as
863 the DRAM Error Threshold.
864
Andi Kleen4efc0672009-04-28 19:07:31 +0200865config X86_ANCIENT_MCE
Jan Beulich6fc108a2010-04-21 15:23:44 +0100866 bool "Support for old Pentium 5 / WinChip machine checks"
Andi Kleenc31d9632009-07-09 00:31:37 +0200867 depends on X86_32 && X86_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900868 ---help---
869 Include support for machine check handling on old Pentium 5 or WinChip
870 systems. These typically need to be enabled explicitely on the command
871 line.
Andi Kleen4efc0672009-04-28 19:07:31 +0200872
Andi Kleenb2762682009-02-12 13:49:31 +0100873config X86_MCE_THRESHOLD
874 depends on X86_MCE_AMD || X86_MCE_INTEL
Jan Beulich6fc108a2010-04-21 15:23:44 +0100875 def_bool y
Andi Kleenb2762682009-02-12 13:49:31 +0100876
Andi Kleenea149b32009-04-29 19:31:00 +0200877config X86_MCE_INJECT
Andi Kleenc1ebf832009-07-09 00:31:41 +0200878 depends on X86_MCE
Andi Kleenea149b32009-04-29 19:31:00 +0200879 tristate "Machine check injector support"
880 ---help---
881 Provide support for injecting machine checks for testing purposes.
882 If you don't know what a machine check is and you don't do kernel
883 QA it is safe to say n.
884
Andi Kleen4efc0672009-04-28 19:07:31 +0200885config X86_THERMAL_VECTOR
886 def_bool y
Andi Kleen5bb38ad2009-07-09 00:31:39 +0200887 depends on X86_MCE_INTEL
Andi Kleen4efc0672009-04-28 19:07:31 +0200888
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100889config VM86
David Rientjes6a108a12011-01-20 14:44:16 -0800890 bool "Enable VM86 support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100891 default y
892 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100893 ---help---
894 This option is required by programs like DOSEMU to run 16-bit legacy
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100895 code on X86 processors. It also may be needed by software like
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100896 XFree86 to initialize some video cards via BIOS. Disabling this
897 option saves about 6k.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100898
899config TOSHIBA
900 tristate "Toshiba Laptop support"
901 depends on X86_32
902 ---help---
903 This adds a driver to safely access the System Management Mode of
904 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
905 not work on models with a Phoenix BIOS. The System Management Mode
906 is used to set the BIOS and power saving options on Toshiba portables.
907
908 For information on utilities to make use of this driver see the
909 Toshiba Linux utilities web site at:
910 <http://www.buzzard.org.uk/toshiba/>.
911
912 Say Y if you intend to run this kernel on a Toshiba portable.
913 Say N otherwise.
914
915config I8K
916 tristate "Dell laptop support"
Jean Delvare949a9d72011-05-25 20:43:33 +0200917 select HWMON
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100918 ---help---
919 This adds a driver to safely access the System Management Mode
920 of the CPU on the Dell Inspiron 8000. The System Management Mode
921 is used to read cpu temperature and cooling fan status and to
922 control the fans on the I8K portables.
923
924 This driver has been tested only on the Inspiron 8000 but it may
925 also work with other Dell laptops. You can force loading on other
926 models by passing the parameter `force=1' to the module. Use at
927 your own risk.
928
929 For information on utilities to make use of this driver see the
930 I8K Linux utilities web site at:
931 <http://people.debian.org/~dz/i8k/>
932
933 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
934 Say N otherwise.
935
936config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700937 bool "Enable X86 board specific fixups for reboot"
938 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100939 ---help---
940 This enables chipset and/or board specific fixups to be done
941 in order to get reboot to work correctly. This is only needed on
942 some combinations of hardware and BIOS. The symptom, for which
943 this config is intended, is when reboot ends with a stalled/hung
944 system.
945
946 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100947 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100948
949 Say Y if you want to enable the fixup. Currently, it's safe to
950 enable this option even if you don't need it.
951 Say N otherwise.
952
953config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200954 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100955 select FW_LOADER
956 ---help---
957 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200958 certain Intel and AMD processors. The Intel support is for the
959 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
960 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
961 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
962 You will obviously need the actual microcode binary data itself
963 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100964
Peter Oruba8d86f392008-07-28 18:44:21 +0200965 This option selects the general module only, you need to select
966 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100967
968 To compile this driver as a module, choose M here: the
969 module will be called microcode.
970
Peter Oruba8d86f392008-07-28 18:44:21 +0200971config MICROCODE_INTEL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100972 bool "Intel microcode patch loading support"
973 depends on MICROCODE
974 default MICROCODE
975 select FW_LOADER
976 ---help---
977 This options enables microcode patch loading support for Intel
978 processors.
Peter Oruba8d86f392008-07-28 18:44:21 +0200979
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100980 For latest news and information on obtaining all the required
981 Intel ingredients for this driver, check:
982 <http://www.urbanmyth.org/microcode/>.
Peter Oruba8d86f392008-07-28 18:44:21 +0200983
Peter Oruba80cc9f12008-07-28 18:44:22 +0200984config MICROCODE_AMD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100985 bool "AMD microcode patch loading support"
986 depends on MICROCODE
987 select FW_LOADER
988 ---help---
989 If you select this option, microcode patch loading support for AMD
990 processors will be enabled.
Peter Oruba80cc9f12008-07-28 18:44:22 +0200991
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100992config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100993 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100994 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100995
996config X86_MSR
997 tristate "/dev/cpu/*/msr - Model-specific register support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100998 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100999 This device gives privileged processes access to the x86
1000 Model-Specific Registers (MSRs). It is a character device with
1001 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
1002 MSR accesses are directed to a specific CPU on multi-processor
1003 systems.
1004
1005config X86_CPUID
1006 tristate "/dev/cpu/*/cpuid - CPU information support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001007 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001008 This device gives processes access to the x86 CPUID instruction to
1009 be executed on a specific processor. It is a character device
1010 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
1011 /dev/cpu/31/cpuid.
1012
1013choice
1014 prompt "High Memory Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001015 default HIGHMEM64G if X86_NUMAQ
Jan Beulich6fc108a2010-04-21 15:23:44 +01001016 default HIGHMEM4G
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001017 depends on X86_32
1018
1019config NOHIGHMEM
1020 bool "off"
1021 depends on !X86_NUMAQ
1022 ---help---
1023 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
1024 However, the address space of 32-bit x86 processors is only 4
1025 Gigabytes large. That means that, if you have a large amount of
1026 physical memory, not all of it can be "permanently mapped" by the
1027 kernel. The physical memory that's not permanently mapped is called
1028 "high memory".
1029
1030 If you are compiling a kernel which will never run on a machine with
1031 more than 1 Gigabyte total physical RAM, answer "off" here (default
1032 choice and suitable for most users). This will result in a "3GB/1GB"
1033 split: 3GB are mapped so that each process sees a 3GB virtual memory
1034 space and the remaining part of the 4GB virtual memory space is used
1035 by the kernel to permanently map as much physical memory as
1036 possible.
1037
1038 If the machine has between 1 and 4 Gigabytes physical RAM, then
1039 answer "4GB" here.
1040
1041 If more than 4 Gigabytes is used then answer "64GB" here. This
1042 selection turns Intel PAE (Physical Address Extension) mode on.
1043 PAE implements 3-level paging on IA32 processors. PAE is fully
1044 supported by Linux, PAE mode is implemented on all recent Intel
1045 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
1046 then the kernel will not boot on CPUs that don't support PAE!
1047
1048 The actual amount of total physical memory will either be
1049 auto detected or can be forced by using a kernel command line option
1050 such as "mem=256M". (Try "man bootparam" or see the documentation of
1051 your boot loader (lilo or loadlin) about how to pass options to the
1052 kernel at boot time.)
1053
1054 If unsure, say "off".
1055
1056config HIGHMEM4G
1057 bool "4GB"
1058 depends on !X86_NUMAQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001059 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001060 Select this if you have a 32-bit processor and between 1 and 4
1061 gigabytes of physical RAM.
1062
1063config HIGHMEM64G
1064 bool "64GB"
1065 depends on !M386 && !M486
1066 select X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001067 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001068 Select this if you have a 32-bit processor and more than 4
1069 gigabytes of physical RAM.
1070
1071endchoice
1072
1073choice
1074 depends on EXPERIMENTAL
David Rientjes6a108a12011-01-20 14:44:16 -08001075 prompt "Memory split" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001076 default VMSPLIT_3G
1077 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001078 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001079 Select the desired split between kernel and user memory.
1080
1081 If the address range available to the kernel is less than the
1082 physical memory installed, the remaining memory will be available
1083 as "high memory". Accessing high memory is a little more costly
1084 than low memory, as it needs to be mapped into the kernel first.
1085 Note that increasing the kernel address space limits the range
1086 available to user programs, making the address space there
1087 tighter. Selecting anything other than the default 3G/1G split
1088 will also likely make your kernel incompatible with binary-only
1089 kernel modules.
1090
1091 If you are not absolutely sure what you are doing, leave this
1092 option alone!
1093
1094 config VMSPLIT_3G
1095 bool "3G/1G user/kernel split"
1096 config VMSPLIT_3G_OPT
1097 depends on !X86_PAE
1098 bool "3G/1G user/kernel split (for full 1G low memory)"
1099 config VMSPLIT_2G
1100 bool "2G/2G user/kernel split"
1101 config VMSPLIT_2G_OPT
1102 depends on !X86_PAE
1103 bool "2G/2G user/kernel split (for full 2G low memory)"
1104 config VMSPLIT_1G
1105 bool "1G/3G user/kernel split"
1106endchoice
1107
1108config PAGE_OFFSET
1109 hex
1110 default 0xB0000000 if VMSPLIT_3G_OPT
1111 default 0x80000000 if VMSPLIT_2G
1112 default 0x78000000 if VMSPLIT_2G_OPT
1113 default 0x40000000 if VMSPLIT_1G
1114 default 0xC0000000
1115 depends on X86_32
1116
1117config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001118 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001119 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001120
1121config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -07001122 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001123 depends on X86_32 && !HIGHMEM4G
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001124 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001125 PAE is required for NX support, and furthermore enables
1126 larger swapspace support for non-overcommit purposes. It
1127 has the cost of more pagetable lookup overhead, and also
1128 consumes more pagetable space per process.
1129
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001130config ARCH_PHYS_ADDR_T_64BIT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001131 def_bool X86_64 || X86_PAE
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001132
FUJITA Tomonori66f2b062010-10-20 15:55:35 -07001133config ARCH_DMA_ADDR_T_64BIT
1134 def_bool X86_64 || HIGHMEM64G
1135
Nick Piggin9e899812008-10-22 12:33:16 +02001136config DIRECT_GBPAGES
David Rientjes6a108a12011-01-20 14:44:16 -08001137 bool "Enable 1GB pages for kernel pagetables" if EXPERT
Nick Piggin9e899812008-10-22 12:33:16 +02001138 default y
1139 depends on X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001140 ---help---
Nick Piggin9e899812008-10-22 12:33:16 +02001141 Allow the kernel linear mapping to use 1GB pages on CPUs that
1142 support it. This can improve the kernel's performance a tiny bit by
1143 reducing TLB pressure. If in doubt, say "Y".
1144
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001145# Common NUMA Features
1146config NUMA
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001147 bool "Numa Memory Allocation and Scheduler Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001148 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +01001149 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Yinghai Lu0699eae2008-06-17 15:39:01 -07001150 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001151 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001152 Enable NUMA (Non Uniform Memory Access) support.
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001153
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001154 The kernel will try to allocate memory used by a CPU on the
1155 local memory controller of the CPU and add some more
1156 NUMA awareness to the kernel.
1157
Ingo Molnarc280ea52008-11-08 13:29:45 +01001158 For 64-bit this is recommended if the system is Intel Core i7
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001159 (or later), AMD Opteron, or EM64T NUMA.
1160
1161 For 32-bit this is only needed on (rare) 32-bit-only platforms
1162 that support NUMA topologies, such as NUMAQ / Summit, or if you
1163 boot a 32-bit kernel on a 64-bit NUMA platform.
1164
1165 Otherwise, you should say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001166
1167comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
1168 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
1169
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001170config AMD_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001171 def_bool y
1172 prompt "Old style AMD Opteron NUMA detection"
Tejun Heo5da0ef92011-07-11 10:34:32 +02001173 depends on X86_64 && NUMA && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001174 ---help---
Hans Rosenfeldeec1d4f2010-10-29 17:14:30 +02001175 Enable AMD NUMA node topology detection. You should say Y here if
1176 you have a multi processor AMD system. This uses an old method to
1177 read the NUMA configuration directly from the builtin Northbridge
1178 of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
1179 which also takes priority if both are compiled in.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001180
1181config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001182 def_bool y
1183 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001184 depends on X86_64 && NUMA && ACPI && PCI
1185 select ACPI_NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001186 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001187 Enable ACPI SRAT based node topology detection.
1188
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001189# Some NUMA nodes have memory ranges that span
1190# other nodes. Even though a pfn is valid and
1191# between a node's start and end pfns, it may not
1192# reside on that node. See memmap_init_zone()
1193# for details.
1194config NODES_SPAN_OTHER_NODES
1195 def_bool y
1196 depends on X86_64_ACPI_NUMA
1197
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001198config NUMA_EMU
1199 bool "NUMA emulation"
Tejun Heo1b7e03e2011-05-02 17:24:48 +02001200 depends on NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001201 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001202 Enable NUMA emulation. A flat machine will be split
1203 into virtual nodes when booted with "numa=fake=N", where N is the
1204 number of nodes. This is only useful for debugging.
1205
1206config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001207 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
David Rientjes51591e32010-03-25 15:39:27 -07001208 range 1 10
1209 default "10" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001210 default "6" if X86_64
1211 default "4" if X86_NUMAQ
1212 default "3"
1213 depends on NEED_MULTIPLE_NODES
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001214 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +02001215 Specify the maximum number of NUMA Nodes available on the target
Matt LaPlante692105b2009-01-26 11:12:25 +01001216 system. Increases memory reserved to accommodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001217
Tejun Heoc1329372009-02-24 11:57:20 +09001218config HAVE_ARCH_BOOTMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001219 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001220 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001221
Tejun Heo3b166512011-04-01 11:15:12 +02001222config HAVE_ARCH_ALLOC_REMAP
1223 def_bool y
1224 depends on X86_32 && NUMA
1225
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001226config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001227 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001228 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001229
1230config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001231 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001232 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001233
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001234config ARCH_FLATMEM_ENABLE
1235 def_bool y
Tejun Heo3b166512011-04-01 11:15:12 +02001236 depends on X86_32 && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001237
1238config ARCH_DISCONTIGMEM_ENABLE
1239 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001240 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001241
1242config ARCH_DISCONTIGMEM_DEFAULT
1243 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001244 depends on NUMA && X86_32
1245
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001246config ARCH_SPARSEMEM_ENABLE
1247 def_bool y
Yinghai Lu4272ebf2009-01-29 15:14:46 -08001248 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001249 select SPARSEMEM_STATIC if X86_32
1250 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1251
Tejun Heo3b166512011-04-01 11:15:12 +02001252config ARCH_SPARSEMEM_DEFAULT
1253 def_bool y
1254 depends on X86_64
1255
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001256config ARCH_SELECT_MEMORY_MODEL
1257 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001258 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001259
1260config ARCH_MEMORY_PROBE
1261 def_bool X86_64
1262 depends on MEMORY_HOTPLUG
1263
Tejun Heo3b166512011-04-01 11:15:12 +02001264config ARCH_PROC_KCORE_TEXT
1265 def_bool y
1266 depends on X86_64 && PROC_KCORE
1267
Avi Kivitya29815a2010-01-10 16:28:09 +02001268config ILLEGAL_POINTER_VALUE
1269 hex
1270 default 0 if X86_32
1271 default 0xdead000000000000 if X86_64
1272
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001273source "mm/Kconfig"
1274
1275config HIGHPTE
1276 bool "Allocate 3rd-level pagetables from highmem"
Jan Beulich6fc108a2010-04-21 15:23:44 +01001277 depends on HIGHMEM
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001278 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001279 The VM uses one page table entry for each page of physical memory.
1280 For systems with a lot of RAM, this can be wasteful of precious
1281 low memory. Setting this option will put user-space page table
1282 entries in high memory.
1283
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001284config X86_CHECK_BIOS_CORRUPTION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001285 bool "Check for low memory corruption"
1286 ---help---
1287 Periodically check for memory corruption in low memory, which
1288 is suspected to be caused by BIOS. Even when enabled in the
1289 configuration, it is disabled at runtime. Enable it by
1290 setting "memory_corruption_check=1" on the kernel command
1291 line. By default it scans the low 64k of memory every 60
1292 seconds; see the memory_corruption_check_size and
1293 memory_corruption_check_period parameters in
1294 Documentation/kernel-parameters.txt to adjust this.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001295
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001296 When enabled with the default parameters, this option has
1297 almost no overhead, as it reserves a relatively small amount
1298 of memory and scans it infrequently. It both detects corruption
1299 and prevents it from affecting the running system.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001300
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001301 It is, however, intended as a diagnostic tool; if repeatable
1302 BIOS-originated corruption always affects the same memory,
1303 you can use memmap= to prevent the kernel from using that
1304 memory.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001305
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001306config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001307 bool "Set the default setting of memory_corruption_check"
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001308 depends on X86_CHECK_BIOS_CORRUPTION
1309 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001310 ---help---
1311 Set whether the default state of memory_corruption_check is
1312 on or off.
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001313
H. Peter Anvin9ea77bd2010-08-25 16:38:20 -07001314config X86_RESERVE_LOW
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001315 int "Amount of low memory, in kilobytes, to reserve for the BIOS"
1316 default 64
1317 range 4 640
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001318 ---help---
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001319 Specify the amount of low memory to reserve for the BIOS.
Ingo Molnarfc381512008-09-16 10:07:34 +02001320
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001321 The first page contains BIOS data structures that the kernel
1322 must not use, so that page must always be reserved.
Ingo Molnarfc381512008-09-16 10:07:34 +02001323
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001324 By default we reserve the first 64K of physical RAM, as a
1325 number of BIOSes are known to corrupt that memory range
1326 during events such as suspend/resume or monitor cable
1327 insertion, so it must not be used by the kernel.
Ingo Molnarfc381512008-09-16 10:07:34 +02001328
H. Peter Anvind0cd7422010-08-24 17:32:04 -07001329 You can set this to 4 if you are absolutely sure that you
1330 trust the BIOS to get all its memory reservations and usages
1331 right. If you know your BIOS have problems beyond the
1332 default 64K area, you can set this to 640 to avoid using the
1333 entire low memory range.
1334
1335 If you have doubts about the BIOS (e.g. suspend/resume does
1336 not work or there's kernel crashes after certain hardware
1337 hotplug events) then you might want to enable
1338 X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check
1339 typical corruption patterns.
1340
1341 Leave this to the default value of 64 if you are unsure.
Ingo Molnarfc381512008-09-16 10:07:34 +02001342
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001343config MATH_EMULATION
1344 bool
1345 prompt "Math emulation" if X86_32
1346 ---help---
1347 Linux can emulate a math coprocessor (used for floating point
1348 operations) if you don't have one. 486DX and Pentium processors have
1349 a math coprocessor built in, 486SX and 386 do not, unless you added
1350 a 487DX or 387, respectively. (The messages during boot time can
1351 give you some hints here ["man dmesg"].) Everyone needs either a
1352 coprocessor or this emulation.
1353
1354 If you don't have a math coprocessor, you need to say Y here; if you
1355 say Y here even though you have a coprocessor, the coprocessor will
1356 be used nevertheless. (This behavior can be changed with the kernel
1357 command line option "no387", which comes handy if your coprocessor
1358 is broken. Try "man bootparam" or see the documentation of your boot
1359 loader (lilo or loadlin) about how to pass options to the kernel at
1360 boot time.) This means that it is a good idea to say Y here if you
1361 intend to use this kernel on different machines.
1362
1363 More information about the internals of the Linux math coprocessor
1364 emulation can be found in <file:arch/x86/math-emu/README>.
1365
1366 If you are not sure, say Y; apart from resulting in a 66 KB bigger
1367 kernel, it won't hurt.
1368
1369config MTRR
Jan Beulich6fc108a2010-04-21 15:23:44 +01001370 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001371 prompt "MTRR (Memory Type Range Register) support" if EXPERT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001372 ---help---
1373 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1374 the Memory Type Range Registers (MTRRs) may be used to control
1375 processor access to memory ranges. This is most useful if you have
1376 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1377 allows bus write transfers to be combined into a larger transfer
1378 before bursting over the PCI/AGP bus. This can increase performance
1379 of image write operations 2.5 times or more. Saying Y here creates a
1380 /proc/mtrr file which may be used to manipulate your processor's
1381 MTRRs. Typically the X server should use this.
1382
1383 This code has a reasonably generic interface so that similar
1384 control registers on other processors can be easily supported
1385 as well:
1386
1387 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1388 Registers (ARRs) which provide a similar functionality to MTRRs. For
1389 these, the ARRs are used to emulate the MTRRs.
1390 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1391 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1392 write-combining. All of these processors are supported by this code
1393 and it makes sense to say Y here if you have one of them.
1394
1395 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1396 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1397 can lead to all sorts of problems, so it's good to say Y here.
1398
1399 You can safely say Y even if your machine doesn't have MTRRs, you'll
1400 just add about 9 KB to your kernel.
1401
Randy Dunlap7225e752008-07-26 17:54:22 -07001402 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001403
Yinghai Lu95ffa242008-04-29 03:52:33 -07001404config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001405 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001406 prompt "MTRR cleanup support"
1407 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001408 ---help---
Thomas Gleixneraba37282008-07-15 14:48:48 +02001409 Convert MTRR layout from continuous to discrete, so X drivers can
1410 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001411
Thomas Gleixneraba37282008-07-15 14:48:48 +02001412 Can be disabled with disable_mtrr_cleanup on the kernel command line.
Matt LaPlante692105b2009-01-26 11:12:25 +01001413 The largest mtrr entry size for a continuous block can be set with
Thomas Gleixneraba37282008-07-15 14:48:48 +02001414 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001415
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001416 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001417
1418config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001419 int "MTRR cleanup enable value (0-1)"
1420 range 0 1
1421 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001422 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001423 ---help---
Yinghai Luf5098d62008-04-29 20:25:58 -07001424 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001425
Yinghai Lu12031a62008-05-02 02:40:22 -07001426config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1427 int "MTRR cleanup spare reg num (0-7)"
1428 range 0 7
1429 default "1"
1430 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001431 ---help---
Yinghai Lu12031a62008-05-02 02:40:22 -07001432 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001433 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001434
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001435config X86_PAT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001436 def_bool y
David Rientjes6a108a12011-01-20 14:44:16 -08001437 prompt "x86 PAT support" if EXPERT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001438 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001439 ---help---
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001440 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001441
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001442 PATs are the modern equivalents of MTRRs and are much more
1443 flexible than MTRRs.
1444
1445 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001446 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001447
1448 If unsure, say Y.
1449
Venkatesh Pallipadi46cf98c2009-07-10 09:57:37 -07001450config ARCH_USES_PG_UNCACHED
1451 def_bool y
1452 depends on X86_PAT
1453
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001454config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001455 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001456 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001457 ---help---
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001458 This enables the kernel to use EFI runtime services that are
1459 available (such as the EFI variable services).
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001460
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001461 This option is only useful on systems that have EFI firmware.
1462 In addition, you should use the latest ELILO loader available
1463 at <http://elilo.sourceforge.net> in order to take advantage
1464 of EFI runtime services. However, even with this option, the
1465 resultant kernel should continue to boot on existing non-EFI
1466 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001467
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001468config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001469 def_bool y
1470 prompt "Enable seccomp to safely compute untrusted bytecode"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001471 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001472 This kernel feature is useful for number crunching applications
1473 that may need to compute untrusted bytecode during their
1474 execution. By using pipes or other transports made available to
1475 the process as file descriptors supporting the read/write
1476 syscalls, it's possible to isolate those applications in
1477 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001478 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001479 and the task is only allowed to execute a few safe syscalls
1480 defined by each seccomp mode.
1481
1482 If unsure, say Y. Only embedded should say N here.
1483
1484config CC_STACKPROTECTOR
1485 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001486 ---help---
1487 This option turns on the -fstack-protector GCC feature. This
Ingo Molnar113c5412008-02-14 10:36:03 +01001488 feature puts, at the beginning of functions, a canary value on
1489 the stack just before the return address, and validates
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001490 the value just before actually returning. Stack based buffer
1491 overflows (that need to overwrite this return address) now also
1492 overwrite the canary, which gets detected and the attack is then
1493 neutralized via a kernel panic.
1494
1495 This feature requires gcc version 4.2 or above, or a distribution
1496 gcc with the feature backported. Older versions are automatically
Ingo Molnar113c5412008-02-14 10:36:03 +01001497 detected and for those versions, this configuration option is
1498 ignored. (and a warning is printed during bootup)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001499
1500source kernel/Kconfig.hz
1501
1502config KEXEC
1503 bool "kexec system call"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001504 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001505 kexec is a system call that implements the ability to shutdown your
1506 current kernel, and to start another kernel. It is like a reboot
1507 but it is independent of the system firmware. And like a reboot
1508 you can start any kernel with it, not just Linux.
1509
1510 The name comes from the similarity to the exec system call.
1511
1512 It is an ongoing process to be certain the hardware in a machine
1513 is properly shutdown, so do not be surprised if this code does not
1514 initially work for you. It may help to enable device hotplugging
1515 support. As of this writing the exact hardware interface is
1516 strongly in flux, so no good recommendation can be made.
1517
1518config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001519 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001520 depends on X86_64 || (X86_32 && HIGHMEM)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001521 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001522 Generate crash dump after being started by kexec.
1523 This should be normally only set in special crash dump kernels
1524 which are loaded in the main kernel with kexec-tools into
1525 a specially reserved region and then later executed after
1526 a crash by kdump/kexec. The crash dump kernel must be compiled
1527 to a memory address not used by the main kernel or BIOS using
1528 PHYSICAL_START, or it must be built as a relocatable image
1529 (CONFIG_RELOCATABLE=y).
1530 For more details see Documentation/kdump/kdump.txt
1531
Huang Ying3ab83522008-07-25 19:45:07 -07001532config KEXEC_JUMP
1533 bool "kexec jump (EXPERIMENTAL)"
1534 depends on EXPERIMENTAL
Huang Yingfee7b0d2009-03-10 10:57:16 +08001535 depends on KEXEC && HIBERNATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001536 ---help---
Huang Ying89081d12008-07-25 19:45:10 -07001537 Jump between original kernel and kexeced kernel and invoke
1538 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001539
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001540config PHYSICAL_START
David Rientjes6a108a12011-01-20 14:44:16 -08001541 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001542 default "0x1000000"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001543 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001544 This gives the physical address where the kernel is loaded.
1545
1546 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1547 bzImage will decompress itself to above physical address and
1548 run from there. Otherwise, bzImage will run from the address where
1549 it has been loaded by the boot loader and will ignore above physical
1550 address.
1551
1552 In normal kdump cases one does not have to set/change this option
1553 as now bzImage can be compiled as a completely relocatable image
1554 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1555 address. This option is mainly useful for the folks who don't want
1556 to use a bzImage for capturing the crash dump and want to use a
1557 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1558 to be specifically compiled to run from a specific memory area
1559 (normally a reserved region) and this option comes handy.
1560
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001561 So if you are using bzImage for capturing the crash dump,
1562 leave the value here unchanged to 0x1000000 and set
1563 CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
1564 for capturing the crash dump change this value to start of
1565 the reserved region. In other words, it can be set based on
1566 the "X" value as specified in the "crashkernel=YM@XM"
1567 command line boot parameter passed to the panic-ed
1568 kernel. Please take a look at Documentation/kdump/kdump.txt
1569 for more details about crash dumps.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001570
1571 Usage of bzImage for capturing the crash dump is recommended as
1572 one does not have to build two kernels. Same kernel can be used
1573 as production kernel and capture kernel. Above option should have
1574 gone away after relocatable bzImage support is introduced. But it
1575 is present because there are users out there who continue to use
1576 vmlinux for dump capture. This option should go away down the
1577 line.
1578
1579 Don't change this unless you know what you are doing.
1580
1581config RELOCATABLE
H. Peter Anvin26717802009-05-07 14:19:34 -07001582 bool "Build a relocatable kernel"
1583 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001584 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001585 This builds a kernel image that retains relocation information
1586 so it can be loaded someplace besides the default 1MB.
1587 The relocations tend to make the kernel binary about 10% larger,
1588 but are discarded at runtime.
1589
1590 One use is for the kexec on panic case where the recovery kernel
1591 must live at a different physical address than the primary
1592 kernel.
1593
1594 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1595 it has been loaded at and the compile time physical address
1596 (CONFIG_PHYSICAL_START) is ignored.
1597
H. Peter Anvin845adf72009-05-05 21:20:51 -07001598# Relocation on x86-32 needs some additional build support
1599config X86_NEED_RELOCS
1600 def_bool y
1601 depends on X86_32 && RELOCATABLE
1602
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001603config PHYSICAL_ALIGN
Jan Beulich6fc108a2010-04-21 15:23:44 +01001604 hex "Alignment value to which kernel should be aligned" if X86_32
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001605 default "0x1000000"
1606 range 0x2000 0x1000000
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001607 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001608 This value puts the alignment restrictions on physical address
1609 where kernel is loaded and run from. Kernel is compiled for an
1610 address which meets above alignment restriction.
1611
1612 If bootloader loads the kernel at a non-aligned address and
1613 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1614 address aligned to above value and run from there.
1615
1616 If bootloader loads the kernel at a non-aligned address and
1617 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1618 load address and decompress itself to the address it has been
1619 compiled for and run from there. The address for which kernel is
1620 compiled already meets above alignment restrictions. Hence the
1621 end result is that kernel runs from a physical address meeting
1622 above alignment restrictions.
1623
1624 Don't change this unless you know what you are doing.
1625
1626config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001627 bool "Support for hot-pluggable CPUs"
Ingo Molnar4b19ed912009-01-27 17:47:24 +01001628 depends on SMP && HOTPLUG
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001629 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001630 Say Y here to allow turning CPUs off and on. CPUs can be
1631 controlled through /sys/devices/system/cpu.
1632 ( Note: power management support will enable this option
1633 automatically on SMP systems. )
1634 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001635
1636config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001637 def_bool y
1638 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001639 depends on X86_32 || IA32_EMULATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001640 ---help---
Roland McGrathaf65d642008-01-30 13:30:43 +01001641 Map the 32-bit VDSO to the predictable old-style address too.
Randy Dunlape84446d2009-11-10 15:46:52 -08001642
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001643 Say N here if you are running a sufficiently recent glibc
1644 version (2.3.3 or later), to remove the high-mapped
1645 VDSO mapping and to exclusively use the randomized VDSO.
1646
1647 If unsure, say Y.
1648
Tim Bird516cbf32008-08-12 12:52:36 -07001649config CMDLINE_BOOL
1650 bool "Built-in kernel command line"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001651 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001652 Allow for specifying boot arguments to the kernel at
1653 build time. On some systems (e.g. embedded ones), it is
1654 necessary or convenient to provide some or all of the
1655 kernel boot arguments with the kernel itself (that is,
1656 to not rely on the boot loader to provide them.)
1657
1658 To compile command line arguments into the kernel,
1659 set this option to 'Y', then fill in the
1660 the boot arguments in CONFIG_CMDLINE.
1661
1662 Systems with fully functional boot loaders (i.e. non-embedded)
1663 should leave this option set to 'N'.
1664
1665config CMDLINE
1666 string "Built-in kernel command string"
1667 depends on CMDLINE_BOOL
1668 default ""
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001669 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001670 Enter arguments here that should be compiled into the kernel
1671 image and used at boot time. If the boot loader provides a
1672 command line at boot time, it is appended to this string to
1673 form the full kernel command line, when the system boots.
1674
1675 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1676 change this behavior.
1677
1678 In most cases, the command line (whether built-in or provided
1679 by the boot loader) should specify the device for the root
1680 file system.
1681
1682config CMDLINE_OVERRIDE
1683 bool "Built-in command line overrides boot loader arguments"
Tim Bird516cbf32008-08-12 12:52:36 -07001684 depends on CMDLINE_BOOL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001685 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001686 Set this option to 'Y' to have the kernel ignore the boot loader
1687 command line, and use ONLY the built-in command line.
1688
1689 This is used to work around broken boot loaders. This should
1690 be set to 'N' under normal conditions.
1691
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001692endmenu
1693
1694config ARCH_ENABLE_MEMORY_HOTPLUG
1695 def_bool y
1696 depends on X86_64 || (X86_32 && HIGHMEM)
1697
Gary Hade35551052008-10-31 10:52:03 -07001698config ARCH_ENABLE_MEMORY_HOTREMOVE
1699 def_bool y
1700 depends on MEMORY_HOTPLUG
1701
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001702config USE_PERCPU_NUMA_NODE_ID
Tejun Heo645a7912011-01-23 14:37:40 +01001703 def_bool y
Lee Schermerhorne534c7c2010-05-26 14:44:58 -07001704 depends on NUMA
1705
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001706menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001707
1708config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001709 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001710 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001711
1712source "kernel/power/Kconfig"
1713
1714source "drivers/acpi/Kconfig"
1715
Feng Tangefafc8b2009-08-14 15:23:29 -04001716source "drivers/sfi/Kconfig"
1717
Andi Kleena6b68072008-01-30 13:32:49 +01001718config X86_APM_BOOT
Jan Beulich6fc108a2010-04-21 15:23:44 +01001719 def_bool y
Andi Kleena6b68072008-01-30 13:32:49 +01001720 depends on APM || APM_MODULE
1721
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001722menuconfig APM
1723 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001724 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001725 ---help---
1726 APM is a BIOS specification for saving power using several different
1727 techniques. This is mostly useful for battery powered laptops with
1728 APM compliant BIOSes. If you say Y here, the system time will be
1729 reset after a RESUME operation, the /proc/apm device will provide
1730 battery status information, and user-space programs will receive
1731 notification of APM "events" (e.g. battery status change).
1732
1733 If you select "Y" here, you can disable actual use of the APM
1734 BIOS by passing the "apm=off" option to the kernel at boot time.
1735
1736 Note that the APM support is almost completely disabled for
1737 machines with more than one CPU.
1738
1739 In order to use APM, you will need supporting software. For location
Randy Dunlap53471122008-03-12 18:10:51 -04001740 and more information, read <file:Documentation/power/pm.txt> and the
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001741 Battery Powered Linux mini-HOWTO, available from
1742 <http://www.tldp.org/docs.html#howto>.
1743
1744 This driver does not spin down disk drives (see the hdparm(8)
1745 manpage ("man 8 hdparm") for that), and it doesn't turn off
1746 VESA-compliant "green" monitors.
1747
1748 This driver does not support the TI 4000M TravelMate and the ACER
1749 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1750 desktop machines also don't have compliant BIOSes, and this driver
1751 may cause those machines to panic during the boot phase.
1752
1753 Generally, if you don't have a battery in your machine, there isn't
1754 much point in using this driver and you should say N. If you get
1755 random kernel OOPSes or reboots that don't seem to be related to
1756 anything, try disabling/enabling this option (or disabling/enabling
1757 APM in your BIOS).
1758
1759 Some other things you should try when experiencing seemingly random,
1760 "weird" problems:
1761
1762 1) make sure that you have enough swap space and that it is
1763 enabled.
1764 2) pass the "no-hlt" option to the kernel
1765 3) switch on floating point emulation in the kernel and pass
1766 the "no387" option to the kernel
1767 4) pass the "floppy=nodma" option to the kernel
1768 5) pass the "mem=4M" option to the kernel (thereby disabling
1769 all but the first 4 MB of RAM)
1770 6) make sure that the CPU is not over clocked.
1771 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1772 8) disable the cache from your BIOS settings
1773 9) install a fan for the video card or exchange video RAM
1774 10) install a better fan for the CPU
1775 11) exchange RAM chips
1776 12) exchange the motherboard.
1777
1778 To compile this driver as a module, choose M here: the
1779 module will be called apm.
1780
1781if APM
1782
1783config APM_IGNORE_USER_SUSPEND
1784 bool "Ignore USER SUSPEND"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001785 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001786 This option will ignore USER SUSPEND requests. On machines with a
1787 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1788 series notebooks, it is necessary to say Y because of a BIOS bug.
1789
1790config APM_DO_ENABLE
1791 bool "Enable PM at boot time"
1792 ---help---
1793 Enable APM features at boot time. From page 36 of the APM BIOS
1794 specification: "When disabled, the APM BIOS does not automatically
1795 power manage devices, enter the Standby State, enter the Suspend
1796 State, or take power saving steps in response to CPU Idle calls."
1797 This driver will make CPU Idle calls when Linux is idle (unless this
1798 feature is turned off -- see "Do CPU IDLE calls", below). This
1799 should always save battery power, but more complicated APM features
1800 will be dependent on your BIOS implementation. You may need to turn
1801 this option off if your computer hangs at boot time when using APM
1802 support, or if it beeps continuously instead of suspending. Turn
1803 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1804 T400CDT. This is off by default since most machines do fine without
1805 this feature.
1806
1807config APM_CPU_IDLE
1808 bool "Make CPU Idle calls when idle"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001809 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001810 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1811 On some machines, this can activate improved power savings, such as
1812 a slowed CPU clock rate, when the machine is idle. These idle calls
1813 are made after the idle loop has run for some length of time (e.g.,
1814 333 mS). On some machines, this will cause a hang at boot time or
1815 whenever the CPU becomes idle. (On machines with more than one CPU,
1816 this option does nothing.)
1817
1818config APM_DISPLAY_BLANK
1819 bool "Enable console blanking using APM"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001820 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001821 Enable console blanking using the APM. Some laptops can use this to
1822 turn off the LCD backlight when the screen blanker of the Linux
1823 virtual console blanks the screen. Note that this is only used by
1824 the virtual console screen blanker, and won't turn off the backlight
1825 when using the X Window system. This also doesn't have anything to
1826 do with your VESA-compliant power-saving monitor. Further, this
1827 option doesn't work for all laptops -- it might not turn off your
1828 backlight at all, or it might print a lot of errors to the console,
1829 especially if you are using gpm.
1830
1831config APM_ALLOW_INTS
1832 bool "Allow interrupts during APM BIOS calls"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001833 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001834 Normally we disable external interrupts while we are making calls to
1835 the APM BIOS as a measure to lessen the effects of a badly behaving
1836 BIOS implementation. The BIOS should reenable interrupts if it
1837 needs to. Unfortunately, some BIOSes do not -- especially those in
1838 many of the newer IBM Thinkpads. If you experience hangs when you
1839 suspend, try setting this to Y. Otherwise, say N.
1840
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001841endif # APM
1842
Dave Jonesbb0a56e2011-05-19 18:51:07 -04001843source "drivers/cpufreq/Kconfig"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001844
1845source "drivers/cpuidle/Kconfig"
1846
Andy Henroid27471fd2008-10-09 11:45:22 -07001847source "drivers/idle/Kconfig"
1848
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001849endmenu
1850
1851
1852menu "Bus options (PCI etc.)"
1853
1854config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001855 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001856 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001857 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001858 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001859 Find out whether you have a PCI motherboard. PCI is the name of a
1860 bus system, i.e. the way the CPU talks to the other stuff inside
1861 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1862 VESA. If you have PCI, say Y, otherwise N.
1863
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001864choice
1865 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001866 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001867 default PCI_GOANY
1868 ---help---
1869 On PCI systems, the BIOS can be used to detect the PCI devices and
1870 determine their configuration. However, some old PCI motherboards
1871 have BIOS bugs and may crash if this is done. Also, some embedded
1872 PCI-based systems don't have any BIOS at all. Linux can also try to
1873 detect the PCI hardware directly without using the BIOS.
1874
1875 With this option, you can specify how Linux should detect the
1876 PCI devices. If you choose "BIOS", the BIOS will be used,
1877 if you choose "Direct", the BIOS won't be used, and if you
1878 choose "MMConfig", then PCI Express MMCONFIG will be used.
1879 If you choose "Any", the kernel will try MMCONFIG, then the
1880 direct access method and falls back to the BIOS if that doesn't
1881 work. If unsure, go with the default, which is "Any".
1882
1883config PCI_GOBIOS
1884 bool "BIOS"
1885
1886config PCI_GOMMCONFIG
1887 bool "MMConfig"
1888
1889config PCI_GODIRECT
1890 bool "Direct"
1891
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001892config PCI_GOOLPC
Daniel Drake76fb6572010-09-23 17:28:04 +01001893 bool "OLPC XO-1"
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001894 depends on OLPC
1895
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001896config PCI_GOANY
1897 bool "Any"
1898
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001899endchoice
1900
1901config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001902 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001903 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001904
1905# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1906config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001907 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001908 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001909
1910config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001911 def_bool y
Feng Tang5f0db7a2009-08-14 15:37:50 -04001912 depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001913
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001914config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001915 def_bool y
1916 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001917
Alex Nixonb5401a92010-03-18 16:31:34 -04001918config PCI_XEN
1919 def_bool y
1920 depends on PCI && XEN
1921 select SWIOTLB_XEN
1922
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001923config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001924 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001925 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001926
1927config PCI_MMCONFIG
1928 bool "Support mmconfig PCI config space access"
1929 depends on X86_64 && PCI && ACPI
1930
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001931config PCI_CNB20LE_QUIRK
David Rientjes6a108a12011-01-20 14:44:16 -08001932 bool "Read CNB20LE Host Bridge Windows" if EXPERT
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001933 default n
1934 depends on PCI && EXPERIMENTAL
Ira W. Snyder3f6ea842010-04-01 11:43:30 -07001935 help
1936 Read the PCI windows out of the CNB20LE host bridge. This allows
1937 PCI hotplug to work on systems with the CNB20LE chipset which do
1938 not have ACPI.
1939
Bjorn Helgaas64a5fed2011-01-06 10:12:30 -07001940 There's no public spec for this chipset, and this functionality
1941 is known to be incomplete.
1942
1943 You should say N unless you know you need this.
1944
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001945config DMAR
1946 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
David Woodhouse4cf2e752009-02-11 17:23:43 +00001947 depends on PCI_MSI && ACPI && EXPERIMENTAL
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001948 help
1949 DMA remapping (DMAR) devices support enables independent address
1950 translations for Direct Memory Access (DMA) from devices.
1951 These DMA remapping devices are reported via ACPI tables
1952 and include PCI device scope covered by these DMA
1953 remapping devices.
1954
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001955config DMAR_DEFAULT_ON
Kyle McMartinf6be37f2009-02-26 12:57:56 -05001956 def_bool y
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001957 prompt "Enable DMA Remapping Devices by default"
1958 depends on DMAR
1959 help
1960 Selecting this option will enable a DMAR device at boot time if
1961 one is found. If this option is not selected, DMAR support can
1962 be enabled by passing intel_iommu=on to the kernel. It is
1963 recommended you say N here while the DMAR code remains
1964 experimental.
1965
David Woodhouse62edf5d2009-07-04 10:59:46 +01001966config DMAR_BROKEN_GFX_WA
Jan Beulich6fc108a2010-04-21 15:23:44 +01001967 bool "Workaround broken graphics drivers (going away soon)"
David Woodhouse0c02a202009-09-19 09:37:23 -07001968 depends on DMAR && BROKEN
David Woodhouse62edf5d2009-07-04 10:59:46 +01001969 ---help---
1970 Current Graphics drivers tend to use physical address
1971 for DMA and avoid using DMA APIs. Setting this config
1972 option permits the IOMMU driver to set a unity map for
1973 all the OS-visible memory. Hence the driver can continue
1974 to use physical addresses for DMA, at least until this
1975 option is removed in the 2.6.32 kernel.
1976
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001977config DMAR_FLOPPY_WA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001978 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001979 depends on DMAR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001980 ---help---
David Woodhousec7ab48d2009-06-26 19:10:36 +01001981 Floppy disk drivers are known to bypass DMA API calls
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001982 thereby failing to work when IOMMU is enabled. This
1983 workaround will setup a 1:1 mapping for the first
David Woodhousec7ab48d2009-06-26 19:10:36 +01001984 16MiB to make floppy (an ISA device) work.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001985
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001986config INTR_REMAP
1987 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
1988 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001989 ---help---
1990 Supports Interrupt remapping for IO-APIC and MSI devices.
1991 To use x2apic mode in the CPU's which support x2APIC enhancements or
1992 to support platforms with CPU's having > 8 bit APIC ID, say Y.
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001993
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001994source "drivers/pci/pcie/Kconfig"
1995
1996source "drivers/pci/Kconfig"
1997
David Rientjes1c00f012011-03-22 16:34:59 -07001998# x86_64 have no ISA slots, but can have ISA-style DMA.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001999config ISA_DMA_API
David Rientjes1c00f012011-03-22 16:34:59 -07002000 bool "ISA-style DMA support" if (X86_64 && EXPERT)
2001 default y
2002 help
2003 Enables ISA-style DMA support for devices requiring such controllers.
2004 If unsure, say Y.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002005
2006if X86_32
2007
2008config ISA
2009 bool "ISA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002010 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002011 Find out whether you have ISA slots on your motherboard. ISA is the
2012 name of a bus system, i.e. the way the CPU talks to the other stuff
2013 inside your box. Other bus systems are PCI, EISA, MicroChannel
2014 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
2015 newer boards don't support it. If you have ISA, say Y, otherwise N.
2016
2017config EISA
2018 bool "EISA support"
2019 depends on ISA
2020 ---help---
2021 The Extended Industry Standard Architecture (EISA) bus was
2022 developed as an open alternative to the IBM MicroChannel bus.
2023
2024 The EISA bus provided some of the features of the IBM MicroChannel
2025 bus while maintaining backward compatibility with cards made for
2026 the older ISA bus. The EISA bus saw limited use between 1988 and
2027 1995 when it was made obsolete by the PCI bus.
2028
2029 Say Y here if you are building a kernel for an EISA-based machine.
2030
2031 Otherwise, say N.
2032
2033source "drivers/eisa/Kconfig"
2034
2035config MCA
Ingo Molnar72ee6eb2009-01-27 16:57:49 +01002036 bool "MCA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002037 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002038 MicroChannel Architecture is found in some IBM PS/2 machines and
2039 laptops. It is a bus system similar to PCI or ISA. See
2040 <file:Documentation/mca.txt> (and especially the web page given
2041 there) before attempting to build an MCA bus kernel.
2042
2043source "drivers/mca/Kconfig"
2044
2045config SCx200
2046 tristate "NatSemi SCx200 support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002047 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002048 This provides basic support for National Semiconductor's
2049 (now AMD's) Geode processors. The driver probes for the
2050 PCI-IDs of several on-chip devices, so its a good dependency
2051 for other scx200_* drivers.
2052
2053 If compiled as a module, the driver is named scx200.
2054
2055config SCx200HR_TIMER
2056 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
John Stultz592913e2010-07-13 17:56:20 -07002057 depends on SCx200
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002058 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002059 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002060 This driver provides a clocksource built upon the on-chip
2061 27MHz high-resolution timer. Its also a workaround for
2062 NSC Geode SC-1100's buggy TSC, which loses time when the
2063 processor goes idle (as is done by the scheduler). The
2064 other workaround is idle=poll boot option.
2065
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002066config OLPC
2067 bool "One Laptop Per Child support"
Thomas Gleixner54008972011-02-23 09:50:15 +01002068 depends on !X86_PAE
Andres Salomon3c554942009-12-14 18:00:36 -08002069 select GPIOLIB
Thomas Gleixnerdc3119e72011-02-23 10:08:31 +01002070 select OF
Daniel Drake45bb1672011-03-13 15:10:17 +00002071 select OF_PROMTREE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002072 ---help---
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002073 Add support for detecting the unique features of the OLPC
2074 XO hardware.
2075
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002076config OLPC_XO1
2077 tristate "OLPC XO-1 support"
Andres Salomon419cdc52010-11-29 15:45:06 -08002078 depends on OLPC && MFD_CS5535
Daniel Drakebf1ebf02010-10-10 10:40:32 +01002079 ---help---
2080 Add support for non-essential features of the OLPC XO-1 laptop.
2081
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01002082endif # X86_32
2083
Andreas Herrmann23ac4ae2010-09-17 18:03:43 +02002084config AMD_NB
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002085 def_bool y
Borislav Petkov0e152cd2010-03-12 15:43:03 +01002086 depends on CPU_SUP_AMD && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002087
2088source "drivers/pcmcia/Kconfig"
2089
2090source "drivers/pci/hotplug/Kconfig"
2091
Alexandre Bounine388b78a2011-03-23 16:43:03 -07002092config RAPIDIO
2093 bool "RapidIO support"
2094 depends on PCI
2095 default n
2096 help
2097 If you say Y here, the kernel will include drivers and
2098 infrastructure code to support RapidIO interconnect devices.
2099
2100source "drivers/rapidio/Kconfig"
2101
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002102endmenu
2103
2104
2105menu "Executable file formats / Emulations"
2106
2107source "fs/Kconfig.binfmt"
2108
2109config IA32_EMULATION
2110 bool "IA32 Emulation"
2111 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01002112 select COMPAT_BINFMT_ELF
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002113 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002114 Include code to run 32-bit programs under a 64-bit kernel. You should
2115 likely turn this on, unless you're 100% sure that you don't have any
2116 32-bit programs left.
2117
2118config IA32_AOUT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002119 tristate "IA32 a.out support"
2120 depends on IA32_EMULATION
2121 ---help---
2122 Support old a.out binaries in the 32bit emulation.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002123
2124config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002125 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002126 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002127
2128config COMPAT_FOR_U64_ALIGNMENT
2129 def_bool COMPAT
2130 depends on X86_64
2131
2132config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002133 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04002134 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002135
David Howellsee009e4a02011-03-07 15:06:20 +00002136config KEYS_COMPAT
2137 bool
2138 depends on COMPAT && KEYS
2139 default y
2140
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002141endmenu
2142
2143
Keith Packarde5beae12008-11-03 18:21:45 +01002144config HAVE_ATOMIC_IOMAP
2145 def_bool y
2146 depends on X86_32
2147
Masami Hiramatsu3cba11d2010-10-14 12:10:42 +09002148config HAVE_TEXT_POKE_SMP
2149 bool
2150 select STOP_MACHINE if SMP
2151
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002152source "net/Kconfig"
2153
2154source "drivers/Kconfig"
2155
2156source "drivers/firmware/Kconfig"
2157
2158source "fs/Kconfig"
2159
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002160source "arch/x86/Kconfig.debug"
2161
2162source "security/Kconfig"
2163
2164source "crypto/Kconfig"
2165
Avi Kivityedf88412007-12-16 11:02:48 +02002166source "arch/x86/kvm/Kconfig"
2167
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002168source "lib/Kconfig"