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Sam Ravnborg1032c0b2007-11-06 21:35:08 +01001# x86 configuration
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +01002mainmenu "Linux Kernel Configuration for x86"
3
4# Select 32 or 64 bit
5config 64BIT
Sam Ravnborg68409992007-11-17 15:37:31 +01006 bool "64-bit kernel" if ARCH = "x86"
7 default ARCH = "x86_64"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01008 ---help---
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +01009 Say yes to build a 64-bit kernel - formerly known as x86_64
10 Say no to build a 32-bit kernel - formerly known as i386
11
12config X86_32
13 def_bool !64BIT
14
15config X86_64
16 def_bool 64BIT
Sam Ravnborg1032c0b2007-11-06 21:35:08 +010017
18### Arch settings
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010019config X86
Harvey Harrison3c2362e2008-01-30 13:31:03 +010020 def_bool y
David Woodhousee17c6d52008-06-17 12:19:34 +010021 select HAVE_AOUT if X86_32
Hitoshi Mitake2c5643b2008-11-30 17:16:04 +090022 select HAVE_READQ
23 select HAVE_WRITEQ
Ingo Molnara5574cf2008-05-05 23:19:50 +020024 select HAVE_UNSTABLE_SCHED_CLOCK
Sam Ravnborgec7748b2008-02-09 10:46:40 +010025 select HAVE_IDE
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -050026 select HAVE_OPROFILE
Ingo Molnarcdd6c482009-09-21 12:02:48 +020027 select HAVE_PERF_EVENTS if (!M386 && !M486)
Rik van Riel28b2ee22008-07-23 21:27:05 -070028 select HAVE_IOREMAP_PROT
Mathieu Desnoyers3f550092008-02-02 15:10:35 -050029 select HAVE_KPROBES
Ingo Molnar1f972762008-07-26 13:52:50 +020030 select ARCH_WANT_OPTIONAL_GPIOLIB
Ingo Molnarda4276b2009-01-07 11:05:10 +010031 select ARCH_WANT_FRAME_POINTERS
FUJITA Tomonori7c095e42009-06-17 16:28:12 -070032 select HAVE_DMA_ATTRS
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080033 select HAVE_KRETPROBES
Steven Rostedte4b2b882008-08-14 15:45:11 -040034 select HAVE_FTRACE_MCOUNT_RECORD
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
Albin Tonnerre13510992010-01-08 14:42:45 -080053 select HAVE_KERNEL_LZO
K.Prasad0067f122009-06-01 23:43:57 +053054 select HAVE_HW_BREAKPOINT
Frederic Weisbecker99e8c5a2009-12-17 01:33:54 +010055 select PERF_EVENTS
56 select ANON_INODES
Pekka Enberg0a4af3b2009-02-26 21:38:56 +020057 select HAVE_ARCH_KMEMCHECK
Avi Kivity7c68af62009-09-19 09:40:22 +030058 select HAVE_USER_RETURN_NOTIFIER
Balbir Singh7d8330a2008-02-10 12:46:28 +053059
Linus Torvalds51b26ad2009-04-26 10:12:47 -070060config OUTPUT_FORMAT
61 string
62 default "elf32-i386" if X86_32
63 default "elf64-x86-64" if X86_64
64
Sam Ravnborg73531902008-05-25 23:03:18 +020065config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020066 string
Sam Ravnborg73531902008-05-25 23:03:18 +020067 default "arch/x86/configs/i386_defconfig" if X86_32
68 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020069
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010070config GENERIC_TIME
Harvey Harrison3c2362e2008-01-30 13:31:03 +010071 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010072
73config GENERIC_CMOS_UPDATE
Harvey Harrison3c2362e2008-01-30 13:31:03 +010074 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010075
76config CLOCKSOURCE_WATCHDOG
Harvey Harrison3c2362e2008-01-30 13:31:03 +010077 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010078
79config GENERIC_CLOCKEVENTS
Harvey Harrison3c2362e2008-01-30 13:31:03 +010080 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010081
82config GENERIC_CLOCKEVENTS_BROADCAST
Harvey Harrison3c2362e2008-01-30 13:31:03 +010083 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010084 depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
85
86config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010087 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010088
89config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010090 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010091
Heiko Carstensaa7d9352008-02-01 17:45:14 +010092config HAVE_LATENCYTOP_SUPPORT
93 def_bool y
94
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010095config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +010096 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010097
98config ZONE_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +010099 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100100
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100101config SBUS
102 bool
103
104config GENERIC_ISA_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100105 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100106
107config GENERIC_IOMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100108 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100109
110config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100111 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100112 depends on BUG
Jan Beulichb93a5312008-12-16 11:40:27 +0000113 select GENERIC_BUG_RELATIVE_POINTERS if X86_64
114
115config GENERIC_BUG_RELATIVE_POINTERS
116 bool
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100117
118config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100119 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100120
Florian Fainellia6082952008-01-30 13:33:35 +0100121config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -0700122 bool
Florian Fainellia6082952008-01-30 13:33:35 +0100123
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100124config ARCH_MAY_HAVE_PC_FDC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100125 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100126
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100127config RWSEM_GENERIC_SPINLOCK
128 def_bool !X86_XADD
129
130config RWSEM_XCHGADD_ALGORITHM
131 def_bool X86_XADD
132
Venki Pallipadia6869cc2008-02-08 17:05:44 -0800133config ARCH_HAS_CPU_IDLE_WAIT
134 def_bool y
135
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100136config GENERIC_CALIBRATE_DELAY
137 def_bool y
138
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100139config GENERIC_TIME_VSYSCALL
140 bool
141 default X86_64
142
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800143config ARCH_HAS_CPU_RELAX
144 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100145
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400146config ARCH_HAS_DEFAULT_IDLE
147 def_bool y
148
Pekka Enberg1b27d052008-04-28 02:12:22 -0700149config ARCH_HAS_CACHE_LINE_SIZE
150 def_bool y
151
Mike Travisdd5af902008-01-30 13:33:32 +0100152config HAVE_SETUP_PER_CPU_AREA
Brian Gerst89c9c4c2009-01-27 12:56:48 +0900153 def_bool y
travis@sgi.comb32ef632008-01-30 13:32:51 +0100154
Tejun Heo08fc4582009-08-14 15:00:49 +0900155config NEED_PER_CPU_EMBED_FIRST_CHUNK
156 def_bool y
157
158config NEED_PER_CPU_PAGE_FIRST_CHUNK
Tejun Heo11124412009-02-20 16:29:09 +0900159 def_bool y
160
Mike Travis9f0e8d02008-04-04 18:11:01 -0700161config HAVE_CPUMASK_OF_CPU_MAP
162 def_bool X86_64_SMP
163
Johannes Berg801e4062007-12-08 02:12:39 +0100164config ARCH_HIBERNATION_POSSIBLE
165 def_bool y
Johannes Berg801e4062007-12-08 02:12:39 +0100166
Johannes Bergf4cb5702007-12-08 02:14:00 +0100167config ARCH_SUSPEND_POSSIBLE
168 def_bool y
Johannes Bergf4cb5702007-12-08 02:14:00 +0100169
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100170config ZONE_DMA32
171 bool
172 default X86_64
173
174config ARCH_POPULATES_NODE_MAP
175 def_bool y
176
177config AUDIT_ARCH
178 bool
179 default X86_64
180
Ingo Molnar765c68b2008-04-09 11:03:37 +0200181config ARCH_SUPPORTS_OPTIMIZED_INLINING
182 def_bool y
183
Akinobu Mita6a11f752009-03-31 15:23:17 -0700184config ARCH_SUPPORTS_DEBUG_PAGEALLOC
185 def_bool y
186
Shane Wang69575d32009-09-01 18:25:07 -0700187config HAVE_INTEL_TXT
188 def_bool y
189 depends on EXPERIMENTAL && DMAR && ACPI
190
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100191# Use the generic interrupt handling code in kernel/irq/:
192config GENERIC_HARDIRQS
193 bool
194 default y
195
Thomas Gleixnerf9a36fa2009-03-13 16:37:48 +0100196config GENERIC_HARDIRQS_NO__DO_IRQ
197 def_bool y
198
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100199config GENERIC_IRQ_PROBE
200 bool
201 default y
202
203config GENERIC_PENDING_IRQ
204 bool
205 depends on GENERIC_HARDIRQS && SMP
206 default y
207
James Bottomley6cd10f82008-11-09 11:53:14 -0600208config USE_GENERIC_SMP_HELPERS
209 def_bool y
210 depends on SMP
211
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100212config X86_32_SMP
213 def_bool y
214 depends on X86_32 && SMP
215
216config X86_64_SMP
217 def_bool y
218 depends on X86_64 && SMP
219
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100220config X86_HT
221 bool
Adrian Bunkee0011a2007-12-04 17:19:07 +0100222 depends on SMP
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100223 default y
224
225config X86_TRAMPOLINE
226 bool
Ingo Molnar3e5095d2009-01-27 17:07:08 +0100227 depends on SMP || (64BIT && ACPI_SLEEP)
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100228 default y
229
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
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100234config KTIME_SCALAR
235 def_bool X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100236source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700237source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100238
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100239menu "Processor type and features"
240
241source "kernel/time/Kconfig"
242
243config SMP
244 bool "Symmetric multi-processing support"
245 ---help---
246 This enables support for systems with more than one CPU. If you have
247 a system with only one CPU, like most personal computers, say N. If
248 you have a system with more than one CPU, say Y.
249
250 If you say N here, the kernel will run on single and multiprocessor
251 machines, but will use only one CPU of a multiprocessor machine. If
252 you say Y here, the kernel will run on many, but not all,
253 singleprocessor machines. On a singleprocessor machine, the kernel
254 will run faster if you say N here.
255
256 Note that if you say Y here and choose architecture "586" or
257 "Pentium" under "Processor family", the kernel will not work on 486
258 architectures. Similarly, multiprocessor kernels for the "PPro"
259 architecture may not work on all Pentium based boards.
260
261 People using multiprocessor machines who say Y here should also say
262 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
263 Management" code will be disabled if you say Y here.
264
Adrian Bunk03502fa2008-02-03 15:50:21 +0200265 See also <file:Documentation/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100266 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
267 <http://www.tldp.org/docs.html#howto>.
268
269 If you don't know what to do here, say N.
270
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800271config X86_X2APIC
272 bool "Support x2apic"
David Woodhousef7d7f862009-04-06 23:04:40 -0700273 depends on X86_LOCAL_APIC && X86_64 && INTR_REMAP
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800274 ---help---
275 This enables x2apic support on CPUs that have this feature.
276
277 This allows 32-bit apic IDs (so it can support very large systems),
278 and accesses the local apic via MSRs not via mmio.
279
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800280 If you don't know what to do here, say N.
281
Yinghai Lu0b8f1ef2008-12-05 18:58:31 -0800282config SPARSE_IRQ
283 bool "Support sparse irq numbering"
Yinghai Lu17483a12008-12-12 13:14:18 -0800284 depends on PCI_MSI || HT_IRQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100285 ---help---
Ingo Molnar973656f2008-12-25 16:26:47 +0100286 This enables support for sparse irqs. This is useful for distro
287 kernels that want to define a high CONFIG_NR_CPUS value but still
288 want to have low kernel memory footprint on smaller machines.
Yinghai Lu0b8f1ef2008-12-05 18:58:31 -0800289
Ingo Molnar973656f2008-12-25 16:26:47 +0100290 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
291 out the irq_desc[] array in a more NUMA-friendly way. )
292
293 If you don't know what to do here, say N.
Yinghai Lu0b8f1ef2008-12-05 18:58:31 -0800294
Yinghai Lu15e957d2009-04-30 01:17:50 -0700295config NUMA_IRQ_DESC
296 def_bool y
Yinghai Lub9098952008-12-19 13:48:34 -0800297 depends on SPARSE_IRQ && NUMA
Yinghai Lu48a1b102008-12-11 00:15:01 -0800298
Yinghai Lu6695c852008-06-19 12:13:09 -0700299config X86_MPPARSE
Jan Beulich7a527682008-10-30 10:38:24 +0000300 bool "Enable MPS table" if ACPI
301 default y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200302 depends on X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100303 ---help---
Yinghai Lu6695c852008-06-19 12:13:09 -0700304 For old smp systems that do not have proper acpi support. Newer systems
305 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
Yinghai Lu6695c852008-06-19 12:13:09 -0700306
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800307config X86_BIGSMP
308 bool "Support for big SMP systems with more than 8 CPUs"
309 depends on X86_32 && SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100310 ---help---
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800311 This option is needed for the systems that have more than 8 CPUs
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100312
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800313if X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800314config X86_EXTENDED_PLATFORM
315 bool "Support for extended (non-PC) x86 platforms"
316 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100317 ---help---
Ingo Molnar06ac8342009-01-27 18:11:43 +0100318 If you disable this option then the kernel will only support
319 standard PC platforms. (which covers the vast majority of
320 systems out there.)
321
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800322 If you enable this option then you'll be able to select support
323 for the following (non-PC) 32 bit x86 platforms:
324 AMD Elan
325 NUMAQ (IBM/Sequent)
326 RDC R-321x SoC
327 SGI 320/540 (Visual Workstation)
328 Summit/EXA (IBM x440)
329 Unisys ES7000 IA32 series
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200330 Moorestown MID devices
Ingo Molnar06ac8342009-01-27 18:11:43 +0100331
332 If you have one of these systems, or if you want to build a
333 generic distribution kernel, say Y here - otherwise say N.
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800334endif
Ingo Molnar06ac8342009-01-27 18:11:43 +0100335
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800336if X86_64
337config X86_EXTENDED_PLATFORM
338 bool "Support for extended (non-PC) x86 platforms"
339 default y
340 ---help---
341 If you disable this option then the kernel will only support
342 standard PC platforms. (which covers the vast majority of
343 systems out there.)
344
345 If you enable this option then you'll be able to select support
346 for the following (non-PC) 64 bit x86 platforms:
347 ScaleMP vSMP
348 SGI Ultraviolet
349
350 If you have one of these systems, or if you want to build a
351 generic distribution kernel, say Y here - otherwise say N.
352endif
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800353# This is an alphabetically sorted list of 64 bit extended platforms
354# Please maintain the alphabetic order if and when there are additions
Nick Piggin03b48632009-01-20 04:36:04 +0100355
Ingo Molnar6a485652009-01-27 18:29:13 +0100356config X86_VSMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800357 bool "ScaleMP vSMP"
Ingo Molnar6a485652009-01-27 18:29:13 +0100358 select PARAVIRT
359 depends on X86_64 && PCI
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800360 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100361 ---help---
Ingo Molnar6a485652009-01-27 18:29:13 +0100362 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
363 supposed to run on these EM64T-based machines. Only choose this option
364 if you have one of these machines.
365
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800366config X86_UV
367 bool "SGI Ultraviolet"
368 depends on X86_64
369 depends on X86_EXTENDED_PLATFORM
Jack Steiner54c28d22009-04-03 15:39:42 -0500370 depends on NUMA
Suresh Siddha9d6c26e2009-04-20 13:02:31 -0700371 depends on X86_X2APIC
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800372 ---help---
373 This option is needed in order to support SGI Ultraviolet systems.
374 If you don't have one of these, you should say N here.
375
376# Following is an alphabetically sorted list of 32 bit extended platforms
377# Please maintain the alphabetic order if and when there are additions
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100378
379config X86_ELAN
380 bool "AMD Elan"
381 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800382 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100383 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100384 Select this for an AMD Elan processor.
385
386 Do not use this option for K6/Athlon/Opteron processors!
387
388 If unsure, choose "PC-compatible" instead.
389
Thomas Gleixner3f4110a2009-08-29 14:54:20 +0200390config X86_MRST
391 bool "Moorestown MID platform"
392 depends on X86_32
393 depends on X86_EXTENDED_PLATFORM
394 ---help---
395 Moorestown is Intel's Low Power Intel Architecture (LPIA) based Moblin
396 Internet Device(MID) platform. Moorestown consists of two chips:
397 Lincroft (CPU core, graphics, and memory controller) and Langwell IOH.
398 Unlike standard x86 PCs, Moorestown does not have many legacy devices
399 nor standard legacy replacement devices/features. e.g. Moorestown does
400 not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.
401
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800402config X86_RDC321X
403 bool "RDC R-321x SoC"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100404 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800405 depends on X86_EXTENDED_PLATFORM
406 select M486
407 select X86_REBOOTFIXUPS
408 ---help---
409 This option is needed for RDC R-321x system-on-chip, also known
410 as R-8610-(G).
411 If you don't have one of these chips, you should say N here.
412
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100413config X86_32_NON_STANDARD
Ingo Molnar9c398012009-01-27 18:24:57 +0100414 bool "Support non-standard 32-bit SMP architectures"
415 depends on X86_32 && SMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800416 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100417 ---help---
418 This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
Yinghai Lud49c4282008-06-08 18:31:54 -0700419 subarchitectures. It is intended for a generic binary kernel.
420 if you select them all, kernel will probe it one by one. and will
421 fallback to default.
422
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800423# Alphabetically sorted list of Non standard 32 bit platforms
Yinghai Lud49c4282008-06-08 18:31:54 -0700424
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100425config X86_NUMAQ
426 bool "NUMAQ (IBM/Sequent)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100427 depends on X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100428 select NUMA
Ingo Molnar9c398012009-01-27 18:24:57 +0100429 select X86_MPPARSE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100430 ---help---
Yinghai Lud49c4282008-06-08 18:31:54 -0700431 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
432 NUMA multiquad box. This changes the way that processors are
433 bootstrapped, and uses Clustered Logical APIC addressing mode instead
434 of Flat Logical. You will need a new lynxer.elf file to flash your
435 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100436
Linus Torvaldsd949f362009-09-26 09:35:07 -0700437config X86_SUPPORTS_MEMORY_FAILURE
438 bool
439 # MCE code calls memory_failure():
440 depends on X86_MCE
441 # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
442 depends on !X86_NUMAQ
443 # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
444 depends on X86_64 || !SPARSEMEM
445 select ARCH_SUPPORTS_MEMORY_FAILURE
446 default y
447
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200448config X86_VISWS
449 bool "SGI 320/540 (Visual Workstation)"
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800450 depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
451 depends on X86_32_NON_STANDARD
452 ---help---
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200453 The SGI Visual Workstation series is an IA32-based workstation
454 based on SGI systems chips with some legacy PC hardware attached.
455
456 Say Y here to create a kernel to run on the SGI 320 or 540.
457
458 A kernel compiled for the Visual Workstation will run on general
459 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
460
Ingo Molnar9c398012009-01-27 18:24:57 +0100461config X86_SUMMIT
462 bool "Summit/EXA (IBM x440)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100463 depends on X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100464 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100465 This option is needed for IBM systems that use the Summit/EXA chipset.
466 In particular, it is needed for the x440.
Ingo Molnar1f972762008-07-26 13:52:50 +0200467
Ingo Molnar9c398012009-01-27 18:24:57 +0100468config X86_ES7000
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800469 bool "Unisys ES7000 IA32 series"
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800470 depends on X86_32_NON_STANDARD && X86_BIGSMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100471 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100472 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
473 supposed to run on an IA32-based Unisys ES7000 system.
474
Ingo Molnarae1e9132008-11-11 09:05:16 +0100475config SCHED_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100476 def_bool y
477 prompt "Single-depth WCHAN output"
Ken Chena87d0912008-11-06 11:10:49 -0800478 depends on X86
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100479 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100480 Calculate simpler /proc/<PID>/wchan values. If this option
481 is disabled then wchan values will recurse back to the
482 caller function. This provides more accurate wchan values,
483 at the expense of slightly more scheduling overhead.
484
485 If in doubt, say "Y".
486
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100487menuconfig PARAVIRT_GUEST
488 bool "Paravirtualized guest support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100489 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100490 Say Y here to get to see options related to running Linux under
491 various hypervisors. This option alone does not add any kernel code.
492
493 If you say N, all options in this submenu will be skipped and disabled.
494
495if PARAVIRT_GUEST
496
497source "arch/x86/xen/Kconfig"
498
499config VMI
Alok Katariad0153ca2009-09-29 10:25:24 -0700500 bool "VMI Guest support (DEPRECATED)"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100501 select PARAVIRT
Eduardo Pereira Habkost42d545c2008-01-30 13:33:32 +0100502 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100503 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100504 VMI provides a paravirtualized interface to the VMware ESX server
505 (it could be used by other hypervisors in theory too, but is not
506 at the moment), by linking the kernel to a GPL-ed ROM module
507 provided by the hypervisor.
508
Alok Katariad0153ca2009-09-29 10:25:24 -0700509 As of September 2009, VMware has started a phased retirement
510 of this feature from VMware's products. Please see
511 feature-removal-schedule.txt for details. If you are
512 planning to enable this option, please note that you cannot
513 live migrate a VMI enabled VM to a future VMware product,
514 which doesn't support VMI. So if you expect your kernel to
515 seamlessly migrate to newer VMware products, keep this
516 disabled.
517
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200518config KVM_CLOCK
519 bool "KVM paravirtualized clock"
520 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200521 select PARAVIRT_CLOCK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100522 ---help---
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200523 Turning on this option will allow you to run a paravirtualized clock
524 when running over the KVM hypervisor. Instead of relying on a PIT
525 (or probably other) emulation by the underlying device model, the host
526 provides the guest with timing infrastructure such as time of day, and
527 system time
528
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500529config KVM_GUEST
530 bool "KVM Guest support"
531 select PARAVIRT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100532 ---help---
533 This option enables various optimizations for running under the KVM
534 hypervisor.
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500535
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100536source "arch/x86/lguest/Kconfig"
537
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100538config PARAVIRT
539 bool "Enable paravirtualization code"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100540 ---help---
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100541 This changes the kernel so it can modify itself when it is run
542 under a hypervisor, potentially improving performance significantly
543 over full virtualization. However, when run without a hypervisor
544 the kernel is theoretically slower and slightly larger.
545
Jeremy Fitzhardingeb4ecc122009-05-13 17:16:55 -0700546config PARAVIRT_SPINLOCKS
547 bool "Paravirtualization layer for spinlocks"
548 depends on PARAVIRT && SMP && EXPERIMENTAL
549 ---help---
550 Paravirtualized spinlocks allow a pvops backend to replace the
551 spinlock implementation with something virtualization-friendly
552 (for example, block the virtual CPU rather than spinning).
553
554 Unfortunately the downside is an up to 5% performance hit on
555 native kernels, with various workloads.
556
557 If you are unsure how to answer this question, answer N.
558
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200559config PARAVIRT_CLOCK
560 bool
561 default n
562
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100563endif
564
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400565config PARAVIRT_DEBUG
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100566 bool "paravirt-ops debugging"
567 depends on PARAVIRT && DEBUG_KERNEL
568 ---help---
569 Enable to debug paravirt_ops internals. Specifically, BUG if
570 a paravirt_op is missing when it is called.
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400571
Yinghai Lu03273182008-04-18 17:49:15 -0700572config MEMTEST
573 bool "Memtest"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100574 ---help---
Yinghai Luc64df702008-03-21 18:56:19 -0700575 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700576 to be set.
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100577 memtest=0, mean disabled; -- default
578 memtest=1, mean do 1 test pattern;
579 ...
580 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200581 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100582
583config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100584 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100585 depends on X86_32 && NUMA && X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100586
587config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100588 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100589 depends on X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100590
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100591source "arch/x86/Kconfig.cpu"
592
593config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100594 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100595 prompt "HPET Timer Support" if X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100596 ---help---
597 Use the IA-PC HPET (High Precision Event Timer) to manage
598 time in preference to the PIT and RTC, if a HPET is
599 present.
600 HPET is the next generation timer replacing legacy 8254s.
601 The HPET provides a stable time base on SMP
602 systems, unlike the TSC, but it is more expensive to access,
603 as it is off-chip. You can find the HPET spec at
604 <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100605
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100606 You can safely choose Y here. However, HPET will only be
607 activated if the platform and the BIOS support this feature.
608 Otherwise the 8254 will be used for timing services.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100609
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100610 Choose N to continue using the legacy 8254 timer.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100611
612config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100613 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800614 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100615
616# Mark as embedded because too many people got it wrong.
617# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700618config DMI
619 default y
620 bool "Enable DMI scanning" if EMBEDDED
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100621 ---help---
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700622 Enabled scanning of DMI to identify machine quirks. Say Y
623 here unless you have verified that your setup is not
624 affected by entries in the DMI blacklist. Required by PNP
625 BIOS code.
626
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100627config GART_IOMMU
628 bool "GART IOMMU support" if EMBEDDED
629 default y
630 select SWIOTLB
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100631 depends on X86_64 && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100632 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100633 Support for full DMA access of devices with 32bit memory access only
634 on systems with more than 3GB. This is usually needed for USB,
635 sound, many IDE/SATA chipsets and some other devices.
636 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
637 based hardware IOMMU and a software bounce buffer based IOMMU used
638 on Intel systems and as fallback.
639 The code is only active when needed (enough memory and limited
640 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
641 too.
642
643config CALGARY_IOMMU
644 bool "IBM Calgary IOMMU support"
645 select SWIOTLB
646 depends on X86_64 && PCI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100647 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100648 Support for hardware IOMMUs in IBM's xSeries x366 and x460
649 systems. Needed to run systems with more than 3GB of memory
650 properly with 32-bit PCI devices that do not support DAC
651 (Double Address Cycle). Calgary also supports bus level
652 isolation, where all DMAs pass through the IOMMU. This
653 prevents them from going anywhere except their intended
654 destination. This catches hard-to-find kernel bugs and
655 mis-behaving drivers and devices that do not use the DMA-API
656 properly to set up their DMA buffers. The IOMMU can be
657 turned off at boot time with the iommu=off parameter.
658 Normally the kernel will make the right choice by itself.
659 If unsure, say Y.
660
661config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100662 def_bool y
663 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100664 depends on CALGARY_IOMMU
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100665 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100666 Should Calgary be enabled by default? if you choose 'y', Calgary
667 will be used (if it exists). If you choose 'n', Calgary will not be
668 used even if it exists. If you choose 'n' and would like to use
669 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
670 If unsure, say Y.
671
Joerg Roedel2b188722008-06-26 21:27:37 +0200672config AMD_IOMMU
673 bool "AMD IOMMU support"
Ingo Molnar07c40e82008-06-27 11:31:28 +0200674 select SWIOTLB
Joerg Roedela80dc3e2008-09-11 16:51:41 +0200675 select PCI_MSI
Ingo Molnar24d2ba02008-06-27 10:37:03 +0200676 depends on X86_64 && PCI && ACPI
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100677 ---help---
Joerg Roedel18d22202008-07-03 19:35:06 +0200678 With this option you can enable support for AMD IOMMU hardware in
679 your system. An IOMMU is a hardware component which provides
680 remapping of DMA memory accesses from devices. With an AMD IOMMU you
681 can isolate the the DMA memory of different devices and protect the
682 system from misbehaving device drivers or hardware.
683
684 You can find out if your system has an AMD IOMMU if you look into
685 your BIOS for an option to enable it or if you have an IVRS ACPI
686 table.
Joerg Roedel2b188722008-06-26 21:27:37 +0200687
Joerg Roedel2e117602008-12-11 19:00:12 +0100688config AMD_IOMMU_STATS
689 bool "Export AMD IOMMU statistics to debugfs"
690 depends on AMD_IOMMU
691 select DEBUG_FS
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100692 ---help---
Joerg Roedel2e117602008-12-11 19:00:12 +0100693 This option enables code in the AMD IOMMU driver to collect various
694 statistics about whats happening in the driver and exports that
695 information to userspace via debugfs.
696 If unsure, say N.
697
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100698# need this always selected by IOMMU for the VIA workaround
699config SWIOTLB
Joerg Roedela1afd012008-11-18 12:44:21 +0100700 def_bool y if X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100701 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100702 Support for software bounce buffers used on x86-64 systems
703 which don't have a hardware IOMMU (e.g. the current generation
704 of Intel's x86-64 CPUs). Using this PCI devices which can only
705 access 32-bits of memory can be used on systems with more than
706 3 GB of memory. If unsure, say Y.
707
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700708config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900709 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700710
Joerg Roedel1aaf1182008-11-26 17:25:13 +0100711config IOMMU_API
712 def_bool (AMD_IOMMU || DMAR)
713
Mike Travis1184dc22008-05-12 21:21:12 +0200714config MAXSMP
715 bool "Configure Maximum number of SMP Processors and NUMA Nodes"
Mike Travis36f51012008-12-16 17:33:51 -0800716 depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
717 select CPUMASK_OFFSTACK
Mike Travis1184dc22008-05-12 21:21:12 +0200718 default n
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100719 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +0200720 Configure maximum number of CPUS and NUMA Nodes for this architecture.
721 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100722
723config NR_CPUS
Mike Travis36f51012008-12-16 17:33:51 -0800724 int "Maximum number of CPUs" if SMP && !MAXSMP
Michael K. Johnson2a3313f2009-04-21 21:44:48 -0400725 range 2 8 if SMP && X86_32 && !X86_BIGSMP
Mike Travis36f51012008-12-16 17:33:51 -0800726 range 2 512 if SMP && !MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800727 default "1" if !SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700728 default "4096" if MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800729 default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
730 default "8" if SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100731 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100732 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700733 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100734 minimum value which makes sense is 2.
735
736 This is purely to save memory - each supported CPU adds
737 approximately eight kilobytes to the kernel image.
738
739config SCHED_SMT
740 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800741 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100742 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100743 SMT scheduler support improves the CPU scheduler's decision making
744 when dealing with Intel Pentium 4 chips with HyperThreading at a
745 cost of slightly increased overhead in some places. If unsure say
746 N here.
747
748config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100749 def_bool y
750 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800751 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100752 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100753 Multi-core scheduler support improves the CPU scheduler's decision
754 making when dealing with multi-core CPU chips at a cost of slightly
755 increased overhead in some places. If unsure say N here.
756
757source "kernel/Kconfig.preempt"
758
759config X86_UP_APIC
760 bool "Local APIC support on uniprocessors"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100761 depends on X86_32 && !SMP && !X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100762 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100763 A local APIC (Advanced Programmable Interrupt Controller) is an
764 integrated interrupt controller in the CPU. If you have a single-CPU
765 system which has a processor with a local APIC, you can say Y here to
766 enable and use it. If you say Y here even though your machine doesn't
767 have a local APIC, then the kernel will still run with no slowdown at
768 all. The local APIC supports CPU-generated self-interrupts (timer,
769 performance counters), and the NMI watchdog which detects hard
770 lockups.
771
772config X86_UP_IOAPIC
773 bool "IO-APIC support on uniprocessors"
774 depends on X86_UP_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100775 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100776 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
777 SMP-capable replacement for PC-style interrupt controllers. Most
778 SMP systems and many recent uniprocessor systems have one.
779
780 If you have a single-CPU system with an IO-APIC, you can say Y here
781 to use it. If you say Y here even though your machine doesn't have
782 an IO-APIC, then the kernel will still run with no slowdown at all.
783
784config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100785 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100786 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100787
788config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100789 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100790 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100791
792config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100793 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100794 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100795
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200796config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
797 bool "Reroute for broken boot IRQs"
798 default n
799 depends on X86_IO_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100800 ---help---
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200801 This option enables a workaround that fixes a source of
802 spurious interrupts. This is recommended when threaded
803 interrupt handling is used on systems where the generation of
804 superfluous "boot interrupts" cannot be disabled.
805
806 Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
807 entry in the chipset's IO-APIC is masked (as, e.g. the RT
808 kernel does during interrupt handling). On chipsets where this
809 boot IRQ generation cannot be disabled, this workaround keeps
810 the original IRQ line masked so that only the equivalent "boot
811 IRQ" is delivered to the CPUs. The workaround also tells the
812 kernel to set up the IRQ handler on the boot IRQ line. In this
813 way only one interrupt is delivered to the kernel. Otherwise
814 the spurious second interrupt may cause the kernel to bring
815 down (vital) interrupt lines.
816
817 Only affects "broken" chipsets. Interrupt sharing may be
818 increased on these systems.
819
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100820config X86_MCE
Andi Kleenbab9bc62009-07-09 00:31:38 +0200821 bool "Machine Check / overheating reporting"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100822 ---help---
Andi Kleenbab9bc62009-07-09 00:31:38 +0200823 Machine Check support allows the processor to notify the
824 kernel if it detects a problem (e.g. overheating, data corruption).
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100825 The action the kernel takes depends on the severity of the problem,
Andi Kleenbab9bc62009-07-09 00:31:38 +0200826 ranging from warning messages to halting the machine.
Andi Kleen4efc0672009-04-28 19:07:31 +0200827
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100828config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100829 def_bool y
830 prompt "Intel MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200831 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100832 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100833 Additional support for intel specific MCE features such as
834 the thermal monitor.
835
836config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100837 def_bool y
838 prompt "AMD MCE features"
Andi Kleenc1ebf832009-07-09 00:31:41 +0200839 depends on X86_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100840 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100841 Additional support for AMD specific MCE features such as
842 the DRAM Error Threshold.
843
Andi Kleen4efc0672009-04-28 19:07:31 +0200844config X86_ANCIENT_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900845 def_bool n
Andi Kleenc31d9632009-07-09 00:31:37 +0200846 depends on X86_32 && X86_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900847 prompt "Support for old Pentium 5 / WinChip machine checks"
848 ---help---
849 Include support for machine check handling on old Pentium 5 or WinChip
850 systems. These typically need to be enabled explicitely on the command
851 line.
Andi Kleen4efc0672009-04-28 19:07:31 +0200852
Andi Kleenb2762682009-02-12 13:49:31 +0100853config X86_MCE_THRESHOLD
854 depends on X86_MCE_AMD || X86_MCE_INTEL
855 bool
856 default y
857
Andi Kleenea149b32009-04-29 19:31:00 +0200858config X86_MCE_INJECT
Andi Kleenc1ebf832009-07-09 00:31:41 +0200859 depends on X86_MCE
Andi Kleenea149b32009-04-29 19:31:00 +0200860 tristate "Machine check injector support"
861 ---help---
862 Provide support for injecting machine checks for testing purposes.
863 If you don't know what a machine check is and you don't do kernel
864 QA it is safe to say n.
865
Andi Kleen4efc0672009-04-28 19:07:31 +0200866config X86_THERMAL_VECTOR
867 def_bool y
Andi Kleen5bb38ad2009-07-09 00:31:39 +0200868 depends on X86_MCE_INTEL
Andi Kleen4efc0672009-04-28 19:07:31 +0200869
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100870config VM86
871 bool "Enable VM86 support" if EMBEDDED
872 default y
873 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100874 ---help---
875 This option is required by programs like DOSEMU to run 16-bit legacy
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100876 code on X86 processors. It also may be needed by software like
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100877 XFree86 to initialize some video cards via BIOS. Disabling this
878 option saves about 6k.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100879
880config TOSHIBA
881 tristate "Toshiba Laptop support"
882 depends on X86_32
883 ---help---
884 This adds a driver to safely access the System Management Mode of
885 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
886 not work on models with a Phoenix BIOS. The System Management Mode
887 is used to set the BIOS and power saving options on Toshiba portables.
888
889 For information on utilities to make use of this driver see the
890 Toshiba Linux utilities web site at:
891 <http://www.buzzard.org.uk/toshiba/>.
892
893 Say Y if you intend to run this kernel on a Toshiba portable.
894 Say N otherwise.
895
896config I8K
897 tristate "Dell laptop support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100898 ---help---
899 This adds a driver to safely access the System Management Mode
900 of the CPU on the Dell Inspiron 8000. The System Management Mode
901 is used to read cpu temperature and cooling fan status and to
902 control the fans on the I8K portables.
903
904 This driver has been tested only on the Inspiron 8000 but it may
905 also work with other Dell laptops. You can force loading on other
906 models by passing the parameter `force=1' to the module. Use at
907 your own risk.
908
909 For information on utilities to make use of this driver see the
910 I8K Linux utilities web site at:
911 <http://people.debian.org/~dz/i8k/>
912
913 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
914 Say N otherwise.
915
916config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700917 bool "Enable X86 board specific fixups for reboot"
918 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100919 ---help---
920 This enables chipset and/or board specific fixups to be done
921 in order to get reboot to work correctly. This is only needed on
922 some combinations of hardware and BIOS. The symptom, for which
923 this config is intended, is when reboot ends with a stalled/hung
924 system.
925
926 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100927 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100928
929 Say Y if you want to enable the fixup. Currently, it's safe to
930 enable this option even if you don't need it.
931 Say N otherwise.
932
933config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200934 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100935 select FW_LOADER
936 ---help---
937 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200938 certain Intel and AMD processors. The Intel support is for the
939 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
940 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
941 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
942 You will obviously need the actual microcode binary data itself
943 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100944
Peter Oruba8d86f392008-07-28 18:44:21 +0200945 This option selects the general module only, you need to select
946 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100947
948 To compile this driver as a module, choose M here: the
949 module will be called microcode.
950
Peter Oruba8d86f392008-07-28 18:44:21 +0200951config MICROCODE_INTEL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100952 bool "Intel microcode patch loading support"
953 depends on MICROCODE
954 default MICROCODE
955 select FW_LOADER
956 ---help---
957 This options enables microcode patch loading support for Intel
958 processors.
Peter Oruba8d86f392008-07-28 18:44:21 +0200959
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100960 For latest news and information on obtaining all the required
961 Intel ingredients for this driver, check:
962 <http://www.urbanmyth.org/microcode/>.
Peter Oruba8d86f392008-07-28 18:44:21 +0200963
Peter Oruba80cc9f12008-07-28 18:44:22 +0200964config MICROCODE_AMD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100965 bool "AMD microcode patch loading support"
966 depends on MICROCODE
967 select FW_LOADER
968 ---help---
969 If you select this option, microcode patch loading support for AMD
970 processors will be enabled.
Peter Oruba80cc9f12008-07-28 18:44:22 +0200971
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100972config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100973 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100974 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100975
976config X86_MSR
977 tristate "/dev/cpu/*/msr - Model-specific register support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100978 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100979 This device gives privileged processes access to the x86
980 Model-Specific Registers (MSRs). It is a character device with
981 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
982 MSR accesses are directed to a specific CPU on multi-processor
983 systems.
984
985config X86_CPUID
986 tristate "/dev/cpu/*/cpuid - CPU information support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100987 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100988 This device gives processes access to the x86 CPUID instruction to
989 be executed on a specific processor. It is a character device
990 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
991 /dev/cpu/31/cpuid.
992
993choice
994 prompt "High Memory Support"
995 default HIGHMEM4G if !X86_NUMAQ
996 default HIGHMEM64G if X86_NUMAQ
997 depends on X86_32
998
999config NOHIGHMEM
1000 bool "off"
1001 depends on !X86_NUMAQ
1002 ---help---
1003 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
1004 However, the address space of 32-bit x86 processors is only 4
1005 Gigabytes large. That means that, if you have a large amount of
1006 physical memory, not all of it can be "permanently mapped" by the
1007 kernel. The physical memory that's not permanently mapped is called
1008 "high memory".
1009
1010 If you are compiling a kernel which will never run on a machine with
1011 more than 1 Gigabyte total physical RAM, answer "off" here (default
1012 choice and suitable for most users). This will result in a "3GB/1GB"
1013 split: 3GB are mapped so that each process sees a 3GB virtual memory
1014 space and the remaining part of the 4GB virtual memory space is used
1015 by the kernel to permanently map as much physical memory as
1016 possible.
1017
1018 If the machine has between 1 and 4 Gigabytes physical RAM, then
1019 answer "4GB" here.
1020
1021 If more than 4 Gigabytes is used then answer "64GB" here. This
1022 selection turns Intel PAE (Physical Address Extension) mode on.
1023 PAE implements 3-level paging on IA32 processors. PAE is fully
1024 supported by Linux, PAE mode is implemented on all recent Intel
1025 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
1026 then the kernel will not boot on CPUs that don't support PAE!
1027
1028 The actual amount of total physical memory will either be
1029 auto detected or can be forced by using a kernel command line option
1030 such as "mem=256M". (Try "man bootparam" or see the documentation of
1031 your boot loader (lilo or loadlin) about how to pass options to the
1032 kernel at boot time.)
1033
1034 If unsure, say "off".
1035
1036config HIGHMEM4G
1037 bool "4GB"
1038 depends on !X86_NUMAQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001039 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001040 Select this if you have a 32-bit processor and between 1 and 4
1041 gigabytes of physical RAM.
1042
1043config HIGHMEM64G
1044 bool "64GB"
1045 depends on !M386 && !M486
1046 select X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001047 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001048 Select this if you have a 32-bit processor and more than 4
1049 gigabytes of physical RAM.
1050
1051endchoice
1052
1053choice
1054 depends on EXPERIMENTAL
1055 prompt "Memory split" if EMBEDDED
1056 default VMSPLIT_3G
1057 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001058 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001059 Select the desired split between kernel and user memory.
1060
1061 If the address range available to the kernel is less than the
1062 physical memory installed, the remaining memory will be available
1063 as "high memory". Accessing high memory is a little more costly
1064 than low memory, as it needs to be mapped into the kernel first.
1065 Note that increasing the kernel address space limits the range
1066 available to user programs, making the address space there
1067 tighter. Selecting anything other than the default 3G/1G split
1068 will also likely make your kernel incompatible with binary-only
1069 kernel modules.
1070
1071 If you are not absolutely sure what you are doing, leave this
1072 option alone!
1073
1074 config VMSPLIT_3G
1075 bool "3G/1G user/kernel split"
1076 config VMSPLIT_3G_OPT
1077 depends on !X86_PAE
1078 bool "3G/1G user/kernel split (for full 1G low memory)"
1079 config VMSPLIT_2G
1080 bool "2G/2G user/kernel split"
1081 config VMSPLIT_2G_OPT
1082 depends on !X86_PAE
1083 bool "2G/2G user/kernel split (for full 2G low memory)"
1084 config VMSPLIT_1G
1085 bool "1G/3G user/kernel split"
1086endchoice
1087
1088config PAGE_OFFSET
1089 hex
1090 default 0xB0000000 if VMSPLIT_3G_OPT
1091 default 0x80000000 if VMSPLIT_2G
1092 default 0x78000000 if VMSPLIT_2G_OPT
1093 default 0x40000000 if VMSPLIT_1G
1094 default 0xC0000000
1095 depends on X86_32
1096
1097config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001098 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001099 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001100
1101config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -07001102 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001103 depends on X86_32 && !HIGHMEM4G
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001104 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001105 PAE is required for NX support, and furthermore enables
1106 larger swapspace support for non-overcommit purposes. It
1107 has the cost of more pagetable lookup overhead, and also
1108 consumes more pagetable space per process.
1109
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001110config ARCH_PHYS_ADDR_T_64BIT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001111 def_bool X86_64 || X86_PAE
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001112
Nick Piggin9e899812008-10-22 12:33:16 +02001113config DIRECT_GBPAGES
1114 bool "Enable 1GB pages for kernel pagetables" if EMBEDDED
1115 default y
1116 depends on X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001117 ---help---
Nick Piggin9e899812008-10-22 12:33:16 +02001118 Allow the kernel linear mapping to use 1GB pages on CPUs that
1119 support it. This can improve the kernel's performance a tiny bit by
1120 reducing TLB pressure. If in doubt, say "Y".
1121
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001122# Common NUMA Features
1123config NUMA
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001124 bool "Numa Memory Allocation and Scheduler Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001125 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +01001126 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Yinghai Lu0699eae2008-06-17 15:39:01 -07001127 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001128 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001129 Enable NUMA (Non Uniform Memory Access) support.
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001130
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001131 The kernel will try to allocate memory used by a CPU on the
1132 local memory controller of the CPU and add some more
1133 NUMA awareness to the kernel.
1134
Ingo Molnarc280ea52008-11-08 13:29:45 +01001135 For 64-bit this is recommended if the system is Intel Core i7
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001136 (or later), AMD Opteron, or EM64T NUMA.
1137
1138 For 32-bit this is only needed on (rare) 32-bit-only platforms
1139 that support NUMA topologies, such as NUMAQ / Summit, or if you
1140 boot a 32-bit kernel on a 64-bit NUMA platform.
1141
1142 Otherwise, you should say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001143
1144comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
1145 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
1146
1147config K8_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001148 def_bool y
1149 prompt "Old style AMD Opteron NUMA detection"
1150 depends on X86_64 && NUMA && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001151 ---help---
1152 Enable K8 NUMA node topology detection. You should say Y here if
1153 you have a multi processor AMD K8 system. This uses an old
1154 method to read the NUMA configuration directly from the builtin
1155 Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
1156 instead, which also takes priority if both are compiled in.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001157
1158config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001159 def_bool y
1160 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001161 depends on X86_64 && NUMA && ACPI && PCI
1162 select ACPI_NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001163 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001164 Enable ACPI SRAT based node topology detection.
1165
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001166# Some NUMA nodes have memory ranges that span
1167# other nodes. Even though a pfn is valid and
1168# between a node's start and end pfns, it may not
1169# reside on that node. See memmap_init_zone()
1170# for details.
1171config NODES_SPAN_OTHER_NODES
1172 def_bool y
1173 depends on X86_64_ACPI_NUMA
1174
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001175config NUMA_EMU
1176 bool "NUMA emulation"
1177 depends on X86_64 && NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001178 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001179 Enable NUMA emulation. A flat machine will be split
1180 into virtual nodes when booted with "numa=fake=N", where N is the
1181 number of nodes. This is only useful for debugging.
1182
1183config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001184 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
Jan Beulich46d50c92009-03-12 12:33:06 +00001185 range 1 9
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001186 default "9" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001187 default "6" if X86_64
1188 default "4" if X86_NUMAQ
1189 default "3"
1190 depends on NEED_MULTIPLE_NODES
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001191 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +02001192 Specify the maximum number of NUMA Nodes available on the target
Matt LaPlante692105b2009-01-26 11:12:25 +01001193 system. Increases memory reserved to accommodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001194
Tejun Heoc1329372009-02-24 11:57:20 +09001195config HAVE_ARCH_BOOTMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001196 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001197 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001198
1199config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001200 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001201 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001202
1203config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001204 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001205 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001206
1207config HAVE_ARCH_ALLOC_REMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001208 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001209 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001210
1211config ARCH_FLATMEM_ENABLE
1212 def_bool y
Jeff Chua99809962008-08-06 19:09:53 +08001213 depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001214
1215config ARCH_DISCONTIGMEM_ENABLE
1216 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001217 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001218
1219config ARCH_DISCONTIGMEM_DEFAULT
1220 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001221 depends on NUMA && X86_32
1222
KAMEZAWA Hiroyuki94925872009-09-22 16:45:45 -07001223config ARCH_PROC_KCORE_TEXT
1224 def_bool y
1225 depends on X86_64 && PROC_KCORE
1226
Christoph Lameterb2632952008-01-30 13:30:47 +01001227config ARCH_SPARSEMEM_DEFAULT
1228 def_bool y
1229 depends on X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001230
1231config ARCH_SPARSEMEM_ENABLE
1232 def_bool y
Yinghai Lu4272ebf2009-01-29 15:14:46 -08001233 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001234 select SPARSEMEM_STATIC if X86_32
1235 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1236
1237config ARCH_SELECT_MEMORY_MODEL
1238 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001239 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001240
1241config ARCH_MEMORY_PROBE
1242 def_bool X86_64
1243 depends on MEMORY_HOTPLUG
1244
Avi Kivitya29815a2010-01-10 16:28:09 +02001245config ILLEGAL_POINTER_VALUE
1246 hex
1247 default 0 if X86_32
1248 default 0xdead000000000000 if X86_64
1249
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001250source "mm/Kconfig"
1251
1252config HIGHPTE
1253 bool "Allocate 3rd-level pagetables from highmem"
1254 depends on X86_32 && (HIGHMEM4G || HIGHMEM64G)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001255 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001256 The VM uses one page table entry for each page of physical memory.
1257 For systems with a lot of RAM, this can be wasteful of precious
1258 low memory. Setting this option will put user-space page table
1259 entries in high memory.
1260
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001261config X86_CHECK_BIOS_CORRUPTION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001262 bool "Check for low memory corruption"
1263 ---help---
1264 Periodically check for memory corruption in low memory, which
1265 is suspected to be caused by BIOS. Even when enabled in the
1266 configuration, it is disabled at runtime. Enable it by
1267 setting "memory_corruption_check=1" on the kernel command
1268 line. By default it scans the low 64k of memory every 60
1269 seconds; see the memory_corruption_check_size and
1270 memory_corruption_check_period parameters in
1271 Documentation/kernel-parameters.txt to adjust this.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001272
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001273 When enabled with the default parameters, this option has
1274 almost no overhead, as it reserves a relatively small amount
1275 of memory and scans it infrequently. It both detects corruption
1276 and prevents it from affecting the running system.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001277
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001278 It is, however, intended as a diagnostic tool; if repeatable
1279 BIOS-originated corruption always affects the same memory,
1280 you can use memmap= to prevent the kernel from using that
1281 memory.
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001282
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001283config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001284 bool "Set the default setting of memory_corruption_check"
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001285 depends on X86_CHECK_BIOS_CORRUPTION
1286 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001287 ---help---
1288 Set whether the default state of memory_corruption_check is
1289 on or off.
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001290
Ingo Molnarfc381512008-09-16 10:07:34 +02001291config X86_RESERVE_LOW_64K
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001292 bool "Reserve low 64K of RAM on AMI/Phoenix BIOSen"
Ingo Molnarfc381512008-09-16 10:07:34 +02001293 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001294 ---help---
1295 Reserve the first 64K of physical RAM on BIOSes that are known
1296 to potentially corrupt that memory range. A numbers of BIOSes are
1297 known to utilize this area during suspend/resume, so it must not
1298 be used by the kernel.
Ingo Molnarfc381512008-09-16 10:07:34 +02001299
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001300 Set this to N if you are absolutely sure that you trust the BIOS
1301 to get all its memory reservations and usages right.
Ingo Molnarfc381512008-09-16 10:07:34 +02001302
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001303 If you have doubts about the BIOS (e.g. suspend/resume does not
1304 work or there's kernel crashes after certain hardware hotplug
1305 events) and it's not AMI or Phoenix, then you might want to enable
1306 X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check typical
1307 corruption patterns.
Ingo Molnarfc381512008-09-16 10:07:34 +02001308
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001309 Say Y if unsure.
Ingo Molnarfc381512008-09-16 10:07:34 +02001310
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001311config MATH_EMULATION
1312 bool
1313 prompt "Math emulation" if X86_32
1314 ---help---
1315 Linux can emulate a math coprocessor (used for floating point
1316 operations) if you don't have one. 486DX and Pentium processors have
1317 a math coprocessor built in, 486SX and 386 do not, unless you added
1318 a 487DX or 387, respectively. (The messages during boot time can
1319 give you some hints here ["man dmesg"].) Everyone needs either a
1320 coprocessor or this emulation.
1321
1322 If you don't have a math coprocessor, you need to say Y here; if you
1323 say Y here even though you have a coprocessor, the coprocessor will
1324 be used nevertheless. (This behavior can be changed with the kernel
1325 command line option "no387", which comes handy if your coprocessor
1326 is broken. Try "man bootparam" or see the documentation of your boot
1327 loader (lilo or loadlin) about how to pass options to the kernel at
1328 boot time.) This means that it is a good idea to say Y here if you
1329 intend to use this kernel on different machines.
1330
1331 More information about the internals of the Linux math coprocessor
1332 emulation can be found in <file:arch/x86/math-emu/README>.
1333
1334 If you are not sure, say Y; apart from resulting in a 66 KB bigger
1335 kernel, it won't hurt.
1336
1337config MTRR
Arjan van de Venc03cb312009-10-11 10:33:02 -07001338 bool
1339 default y
1340 prompt "MTRR (Memory Type Range Register) support" if EMBEDDED
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001341 ---help---
1342 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1343 the Memory Type Range Registers (MTRRs) may be used to control
1344 processor access to memory ranges. This is most useful if you have
1345 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1346 allows bus write transfers to be combined into a larger transfer
1347 before bursting over the PCI/AGP bus. This can increase performance
1348 of image write operations 2.5 times or more. Saying Y here creates a
1349 /proc/mtrr file which may be used to manipulate your processor's
1350 MTRRs. Typically the X server should use this.
1351
1352 This code has a reasonably generic interface so that similar
1353 control registers on other processors can be easily supported
1354 as well:
1355
1356 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1357 Registers (ARRs) which provide a similar functionality to MTRRs. For
1358 these, the ARRs are used to emulate the MTRRs.
1359 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1360 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1361 write-combining. All of these processors are supported by this code
1362 and it makes sense to say Y here if you have one of them.
1363
1364 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1365 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1366 can lead to all sorts of problems, so it's good to say Y here.
1367
1368 You can safely say Y even if your machine doesn't have MTRRs, you'll
1369 just add about 9 KB to your kernel.
1370
Randy Dunlap7225e752008-07-26 17:54:22 -07001371 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001372
Yinghai Lu95ffa242008-04-29 03:52:33 -07001373config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001374 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001375 prompt "MTRR cleanup support"
1376 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001377 ---help---
Thomas Gleixneraba37282008-07-15 14:48:48 +02001378 Convert MTRR layout from continuous to discrete, so X drivers can
1379 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001380
Thomas Gleixneraba37282008-07-15 14:48:48 +02001381 Can be disabled with disable_mtrr_cleanup on the kernel command line.
Matt LaPlante692105b2009-01-26 11:12:25 +01001382 The largest mtrr entry size for a continuous block can be set with
Thomas Gleixneraba37282008-07-15 14:48:48 +02001383 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001384
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001385 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001386
1387config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001388 int "MTRR cleanup enable value (0-1)"
1389 range 0 1
1390 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001391 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001392 ---help---
Yinghai Luf5098d62008-04-29 20:25:58 -07001393 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001394
Yinghai Lu12031a62008-05-02 02:40:22 -07001395config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1396 int "MTRR cleanup spare reg num (0-7)"
1397 range 0 7
1398 default "1"
1399 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001400 ---help---
Yinghai Lu12031a62008-05-02 02:40:22 -07001401 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001402 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001403
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001404config X86_PAT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001405 bool
Arjan van de Venc03cb312009-10-11 10:33:02 -07001406 default y
1407 prompt "x86 PAT support" if EMBEDDED
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001408 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001409 ---help---
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001410 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001411
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001412 PATs are the modern equivalents of MTRRs and are much more
1413 flexible than MTRRs.
1414
1415 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001416 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001417
1418 If unsure, say Y.
1419
Venkatesh Pallipadi46cf98c2009-07-10 09:57:37 -07001420config ARCH_USES_PG_UNCACHED
1421 def_bool y
1422 depends on X86_PAT
1423
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001424config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001425 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001426 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001427 ---help---
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001428 This enables the kernel to use EFI runtime services that are
1429 available (such as the EFI variable services).
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001430
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001431 This option is only useful on systems that have EFI firmware.
1432 In addition, you should use the latest ELILO loader available
1433 at <http://elilo.sourceforge.net> in order to take advantage
1434 of EFI runtime services. However, even with this option, the
1435 resultant kernel should continue to boot on existing non-EFI
1436 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001437
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001438config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001439 def_bool y
1440 prompt "Enable seccomp to safely compute untrusted bytecode"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001441 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001442 This kernel feature is useful for number crunching applications
1443 that may need to compute untrusted bytecode during their
1444 execution. By using pipes or other transports made available to
1445 the process as file descriptors supporting the read/write
1446 syscalls, it's possible to isolate those applications in
1447 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001448 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001449 and the task is only allowed to execute a few safe syscalls
1450 defined by each seccomp mode.
1451
1452 If unsure, say Y. Only embedded should say N here.
1453
1454config CC_STACKPROTECTOR
1455 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001456 ---help---
1457 This option turns on the -fstack-protector GCC feature. This
Ingo Molnar113c5412008-02-14 10:36:03 +01001458 feature puts, at the beginning of functions, a canary value on
1459 the stack just before the return address, and validates
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001460 the value just before actually returning. Stack based buffer
1461 overflows (that need to overwrite this return address) now also
1462 overwrite the canary, which gets detected and the attack is then
1463 neutralized via a kernel panic.
1464
1465 This feature requires gcc version 4.2 or above, or a distribution
1466 gcc with the feature backported. Older versions are automatically
Ingo Molnar113c5412008-02-14 10:36:03 +01001467 detected and for those versions, this configuration option is
1468 ignored. (and a warning is printed during bootup)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001469
1470source kernel/Kconfig.hz
1471
1472config KEXEC
1473 bool "kexec system call"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001474 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001475 kexec is a system call that implements the ability to shutdown your
1476 current kernel, and to start another kernel. It is like a reboot
1477 but it is independent of the system firmware. And like a reboot
1478 you can start any kernel with it, not just Linux.
1479
1480 The name comes from the similarity to the exec system call.
1481
1482 It is an ongoing process to be certain the hardware in a machine
1483 is properly shutdown, so do not be surprised if this code does not
1484 initially work for you. It may help to enable device hotplugging
1485 support. As of this writing the exact hardware interface is
1486 strongly in flux, so no good recommendation can be made.
1487
1488config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001489 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001490 depends on X86_64 || (X86_32 && HIGHMEM)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001491 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001492 Generate crash dump after being started by kexec.
1493 This should be normally only set in special crash dump kernels
1494 which are loaded in the main kernel with kexec-tools into
1495 a specially reserved region and then later executed after
1496 a crash by kdump/kexec. The crash dump kernel must be compiled
1497 to a memory address not used by the main kernel or BIOS using
1498 PHYSICAL_START, or it must be built as a relocatable image
1499 (CONFIG_RELOCATABLE=y).
1500 For more details see Documentation/kdump/kdump.txt
1501
Huang Ying3ab83522008-07-25 19:45:07 -07001502config KEXEC_JUMP
1503 bool "kexec jump (EXPERIMENTAL)"
1504 depends on EXPERIMENTAL
Huang Yingfee7b0d2009-03-10 10:57:16 +08001505 depends on KEXEC && HIBERNATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001506 ---help---
Huang Ying89081d12008-07-25 19:45:10 -07001507 Jump between original kernel and kexeced kernel and invoke
1508 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001509
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001510config PHYSICAL_START
1511 hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001512 default "0x1000000"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001513 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001514 This gives the physical address where the kernel is loaded.
1515
1516 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1517 bzImage will decompress itself to above physical address and
1518 run from there. Otherwise, bzImage will run from the address where
1519 it has been loaded by the boot loader and will ignore above physical
1520 address.
1521
1522 In normal kdump cases one does not have to set/change this option
1523 as now bzImage can be compiled as a completely relocatable image
1524 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1525 address. This option is mainly useful for the folks who don't want
1526 to use a bzImage for capturing the crash dump and want to use a
1527 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1528 to be specifically compiled to run from a specific memory area
1529 (normally a reserved region) and this option comes handy.
1530
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001531 So if you are using bzImage for capturing the crash dump,
1532 leave the value here unchanged to 0x1000000 and set
1533 CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
1534 for capturing the crash dump change this value to start of
1535 the reserved region. In other words, it can be set based on
1536 the "X" value as specified in the "crashkernel=YM@XM"
1537 command line boot parameter passed to the panic-ed
1538 kernel. Please take a look at Documentation/kdump/kdump.txt
1539 for more details about crash dumps.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001540
1541 Usage of bzImage for capturing the crash dump is recommended as
1542 one does not have to build two kernels. Same kernel can be used
1543 as production kernel and capture kernel. Above option should have
1544 gone away after relocatable bzImage support is introduced. But it
1545 is present because there are users out there who continue to use
1546 vmlinux for dump capture. This option should go away down the
1547 line.
1548
1549 Don't change this unless you know what you are doing.
1550
1551config RELOCATABLE
H. Peter Anvin26717802009-05-07 14:19:34 -07001552 bool "Build a relocatable kernel"
1553 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001554 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001555 This builds a kernel image that retains relocation information
1556 so it can be loaded someplace besides the default 1MB.
1557 The relocations tend to make the kernel binary about 10% larger,
1558 but are discarded at runtime.
1559
1560 One use is for the kexec on panic case where the recovery kernel
1561 must live at a different physical address than the primary
1562 kernel.
1563
1564 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1565 it has been loaded at and the compile time physical address
1566 (CONFIG_PHYSICAL_START) is ignored.
1567
H. Peter Anvin845adf72009-05-05 21:20:51 -07001568# Relocation on x86-32 needs some additional build support
1569config X86_NEED_RELOCS
1570 def_bool y
1571 depends on X86_32 && RELOCATABLE
1572
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001573config PHYSICAL_ALIGN
1574 hex
1575 prompt "Alignment value to which kernel should be aligned" if X86_32
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001576 default "0x1000000"
1577 range 0x2000 0x1000000
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001578 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001579 This value puts the alignment restrictions on physical address
1580 where kernel is loaded and run from. Kernel is compiled for an
1581 address which meets above alignment restriction.
1582
1583 If bootloader loads the kernel at a non-aligned address and
1584 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1585 address aligned to above value and run from there.
1586
1587 If bootloader loads the kernel at a non-aligned address and
1588 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1589 load address and decompress itself to the address it has been
1590 compiled for and run from there. The address for which kernel is
1591 compiled already meets above alignment restrictions. Hence the
1592 end result is that kernel runs from a physical address meeting
1593 above alignment restrictions.
1594
1595 Don't change this unless you know what you are doing.
1596
1597config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001598 bool "Support for hot-pluggable CPUs"
Ingo Molnar4b19ed912009-01-27 17:47:24 +01001599 depends on SMP && HOTPLUG
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001600 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001601 Say Y here to allow turning CPUs off and on. CPUs can be
1602 controlled through /sys/devices/system/cpu.
1603 ( Note: power management support will enable this option
1604 automatically on SMP systems. )
1605 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001606
1607config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001608 def_bool y
1609 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001610 depends on X86_32 || IA32_EMULATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001611 ---help---
Roland McGrathaf65d642008-01-30 13:30:43 +01001612 Map the 32-bit VDSO to the predictable old-style address too.
Randy Dunlape84446d2009-11-10 15:46:52 -08001613
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001614 Say N here if you are running a sufficiently recent glibc
1615 version (2.3.3 or later), to remove the high-mapped
1616 VDSO mapping and to exclusively use the randomized VDSO.
1617
1618 If unsure, say Y.
1619
Tim Bird516cbf32008-08-12 12:52:36 -07001620config CMDLINE_BOOL
1621 bool "Built-in kernel command line"
1622 default n
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001623 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001624 Allow for specifying boot arguments to the kernel at
1625 build time. On some systems (e.g. embedded ones), it is
1626 necessary or convenient to provide some or all of the
1627 kernel boot arguments with the kernel itself (that is,
1628 to not rely on the boot loader to provide them.)
1629
1630 To compile command line arguments into the kernel,
1631 set this option to 'Y', then fill in the
1632 the boot arguments in CONFIG_CMDLINE.
1633
1634 Systems with fully functional boot loaders (i.e. non-embedded)
1635 should leave this option set to 'N'.
1636
1637config CMDLINE
1638 string "Built-in kernel command string"
1639 depends on CMDLINE_BOOL
1640 default ""
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001641 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001642 Enter arguments here that should be compiled into the kernel
1643 image and used at boot time. If the boot loader provides a
1644 command line at boot time, it is appended to this string to
1645 form the full kernel command line, when the system boots.
1646
1647 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1648 change this behavior.
1649
1650 In most cases, the command line (whether built-in or provided
1651 by the boot loader) should specify the device for the root
1652 file system.
1653
1654config CMDLINE_OVERRIDE
1655 bool "Built-in command line overrides boot loader arguments"
1656 default n
1657 depends on CMDLINE_BOOL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001658 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001659 Set this option to 'Y' to have the kernel ignore the boot loader
1660 command line, and use ONLY the built-in command line.
1661
1662 This is used to work around broken boot loaders. This should
1663 be set to 'N' under normal conditions.
1664
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001665endmenu
1666
1667config ARCH_ENABLE_MEMORY_HOTPLUG
1668 def_bool y
1669 depends on X86_64 || (X86_32 && HIGHMEM)
1670
Gary Hade35551052008-10-31 10:52:03 -07001671config ARCH_ENABLE_MEMORY_HOTREMOVE
1672 def_bool y
1673 depends on MEMORY_HOTPLUG
1674
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001675config HAVE_ARCH_EARLY_PFN_TO_NID
1676 def_bool X86_64
1677 depends on NUMA
1678
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001679menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001680
1681config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001682 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001683 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001684
1685source "kernel/power/Kconfig"
1686
1687source "drivers/acpi/Kconfig"
1688
Feng Tangefafc8b2009-08-14 15:23:29 -04001689source "drivers/sfi/Kconfig"
1690
Andi Kleena6b68072008-01-30 13:32:49 +01001691config X86_APM_BOOT
1692 bool
1693 default y
1694 depends on APM || APM_MODULE
1695
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001696menuconfig APM
1697 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001698 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001699 ---help---
1700 APM is a BIOS specification for saving power using several different
1701 techniques. This is mostly useful for battery powered laptops with
1702 APM compliant BIOSes. If you say Y here, the system time will be
1703 reset after a RESUME operation, the /proc/apm device will provide
1704 battery status information, and user-space programs will receive
1705 notification of APM "events" (e.g. battery status change).
1706
1707 If you select "Y" here, you can disable actual use of the APM
1708 BIOS by passing the "apm=off" option to the kernel at boot time.
1709
1710 Note that the APM support is almost completely disabled for
1711 machines with more than one CPU.
1712
1713 In order to use APM, you will need supporting software. For location
Randy Dunlap53471122008-03-12 18:10:51 -04001714 and more information, read <file:Documentation/power/pm.txt> and the
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001715 Battery Powered Linux mini-HOWTO, available from
1716 <http://www.tldp.org/docs.html#howto>.
1717
1718 This driver does not spin down disk drives (see the hdparm(8)
1719 manpage ("man 8 hdparm") for that), and it doesn't turn off
1720 VESA-compliant "green" monitors.
1721
1722 This driver does not support the TI 4000M TravelMate and the ACER
1723 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1724 desktop machines also don't have compliant BIOSes, and this driver
1725 may cause those machines to panic during the boot phase.
1726
1727 Generally, if you don't have a battery in your machine, there isn't
1728 much point in using this driver and you should say N. If you get
1729 random kernel OOPSes or reboots that don't seem to be related to
1730 anything, try disabling/enabling this option (or disabling/enabling
1731 APM in your BIOS).
1732
1733 Some other things you should try when experiencing seemingly random,
1734 "weird" problems:
1735
1736 1) make sure that you have enough swap space and that it is
1737 enabled.
1738 2) pass the "no-hlt" option to the kernel
1739 3) switch on floating point emulation in the kernel and pass
1740 the "no387" option to the kernel
1741 4) pass the "floppy=nodma" option to the kernel
1742 5) pass the "mem=4M" option to the kernel (thereby disabling
1743 all but the first 4 MB of RAM)
1744 6) make sure that the CPU is not over clocked.
1745 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1746 8) disable the cache from your BIOS settings
1747 9) install a fan for the video card or exchange video RAM
1748 10) install a better fan for the CPU
1749 11) exchange RAM chips
1750 12) exchange the motherboard.
1751
1752 To compile this driver as a module, choose M here: the
1753 module will be called apm.
1754
1755if APM
1756
1757config APM_IGNORE_USER_SUSPEND
1758 bool "Ignore USER SUSPEND"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001759 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001760 This option will ignore USER SUSPEND requests. On machines with a
1761 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1762 series notebooks, it is necessary to say Y because of a BIOS bug.
1763
1764config APM_DO_ENABLE
1765 bool "Enable PM at boot time"
1766 ---help---
1767 Enable APM features at boot time. From page 36 of the APM BIOS
1768 specification: "When disabled, the APM BIOS does not automatically
1769 power manage devices, enter the Standby State, enter the Suspend
1770 State, or take power saving steps in response to CPU Idle calls."
1771 This driver will make CPU Idle calls when Linux is idle (unless this
1772 feature is turned off -- see "Do CPU IDLE calls", below). This
1773 should always save battery power, but more complicated APM features
1774 will be dependent on your BIOS implementation. You may need to turn
1775 this option off if your computer hangs at boot time when using APM
1776 support, or if it beeps continuously instead of suspending. Turn
1777 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1778 T400CDT. This is off by default since most machines do fine without
1779 this feature.
1780
1781config APM_CPU_IDLE
1782 bool "Make CPU Idle calls when idle"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001783 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001784 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1785 On some machines, this can activate improved power savings, such as
1786 a slowed CPU clock rate, when the machine is idle. These idle calls
1787 are made after the idle loop has run for some length of time (e.g.,
1788 333 mS). On some machines, this will cause a hang at boot time or
1789 whenever the CPU becomes idle. (On machines with more than one CPU,
1790 this option does nothing.)
1791
1792config APM_DISPLAY_BLANK
1793 bool "Enable console blanking using APM"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001794 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001795 Enable console blanking using the APM. Some laptops can use this to
1796 turn off the LCD backlight when the screen blanker of the Linux
1797 virtual console blanks the screen. Note that this is only used by
1798 the virtual console screen blanker, and won't turn off the backlight
1799 when using the X Window system. This also doesn't have anything to
1800 do with your VESA-compliant power-saving monitor. Further, this
1801 option doesn't work for all laptops -- it might not turn off your
1802 backlight at all, or it might print a lot of errors to the console,
1803 especially if you are using gpm.
1804
1805config APM_ALLOW_INTS
1806 bool "Allow interrupts during APM BIOS calls"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001807 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001808 Normally we disable external interrupts while we are making calls to
1809 the APM BIOS as a measure to lessen the effects of a badly behaving
1810 BIOS implementation. The BIOS should reenable interrupts if it
1811 needs to. Unfortunately, some BIOSes do not -- especially those in
1812 many of the newer IBM Thinkpads. If you experience hangs when you
1813 suspend, try setting this to Y. Otherwise, say N.
1814
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001815endif # APM
1816
1817source "arch/x86/kernel/cpu/cpufreq/Kconfig"
1818
1819source "drivers/cpuidle/Kconfig"
1820
Andy Henroid27471fd2008-10-09 11:45:22 -07001821source "drivers/idle/Kconfig"
1822
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001823endmenu
1824
1825
1826menu "Bus options (PCI etc.)"
1827
1828config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001829 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001830 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001831 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001832 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001833 Find out whether you have a PCI motherboard. PCI is the name of a
1834 bus system, i.e. the way the CPU talks to the other stuff inside
1835 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1836 VESA. If you have PCI, say Y, otherwise N.
1837
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001838choice
1839 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001840 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001841 default PCI_GOANY
1842 ---help---
1843 On PCI systems, the BIOS can be used to detect the PCI devices and
1844 determine their configuration. However, some old PCI motherboards
1845 have BIOS bugs and may crash if this is done. Also, some embedded
1846 PCI-based systems don't have any BIOS at all. Linux can also try to
1847 detect the PCI hardware directly without using the BIOS.
1848
1849 With this option, you can specify how Linux should detect the
1850 PCI devices. If you choose "BIOS", the BIOS will be used,
1851 if you choose "Direct", the BIOS won't be used, and if you
1852 choose "MMConfig", then PCI Express MMCONFIG will be used.
1853 If you choose "Any", the kernel will try MMCONFIG, then the
1854 direct access method and falls back to the BIOS if that doesn't
1855 work. If unsure, go with the default, which is "Any".
1856
1857config PCI_GOBIOS
1858 bool "BIOS"
1859
1860config PCI_GOMMCONFIG
1861 bool "MMConfig"
1862
1863config PCI_GODIRECT
1864 bool "Direct"
1865
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001866config PCI_GOOLPC
1867 bool "OLPC"
1868 depends on OLPC
1869
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001870config PCI_GOANY
1871 bool "Any"
1872
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001873endchoice
1874
1875config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001876 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001877 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001878
1879# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1880config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001881 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001882 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001883
1884config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001885 def_bool y
Feng Tang5f0db7a2009-08-14 15:37:50 -04001886 depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001887
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001888config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001889 def_bool y
1890 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001891
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001892config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001893 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001894 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001895
1896config PCI_MMCONFIG
1897 bool "Support mmconfig PCI config space access"
1898 depends on X86_64 && PCI && ACPI
1899
1900config DMAR
1901 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
David Woodhouse4cf2e752009-02-11 17:23:43 +00001902 depends on PCI_MSI && ACPI && EXPERIMENTAL
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001903 help
1904 DMA remapping (DMAR) devices support enables independent address
1905 translations for Direct Memory Access (DMA) from devices.
1906 These DMA remapping devices are reported via ACPI tables
1907 and include PCI device scope covered by these DMA
1908 remapping devices.
1909
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001910config DMAR_DEFAULT_ON
Kyle McMartinf6be37f2009-02-26 12:57:56 -05001911 def_bool y
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001912 prompt "Enable DMA Remapping Devices by default"
1913 depends on DMAR
1914 help
1915 Selecting this option will enable a DMAR device at boot time if
1916 one is found. If this option is not selected, DMAR support can
1917 be enabled by passing intel_iommu=on to the kernel. It is
1918 recommended you say N here while the DMAR code remains
1919 experimental.
1920
David Woodhouse62edf5d2009-07-04 10:59:46 +01001921config DMAR_BROKEN_GFX_WA
1922 def_bool n
1923 prompt "Workaround broken graphics drivers (going away soon)"
David Woodhouse0c02a202009-09-19 09:37:23 -07001924 depends on DMAR && BROKEN
David Woodhouse62edf5d2009-07-04 10:59:46 +01001925 ---help---
1926 Current Graphics drivers tend to use physical address
1927 for DMA and avoid using DMA APIs. Setting this config
1928 option permits the IOMMU driver to set a unity map for
1929 all the OS-visible memory. Hence the driver can continue
1930 to use physical addresses for DMA, at least until this
1931 option is removed in the 2.6.32 kernel.
1932
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001933config DMAR_FLOPPY_WA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001934 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001935 depends on DMAR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001936 ---help---
David Woodhousec7ab48d2009-06-26 19:10:36 +01001937 Floppy disk drivers are known to bypass DMA API calls
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001938 thereby failing to work when IOMMU is enabled. This
1939 workaround will setup a 1:1 mapping for the first
David Woodhousec7ab48d2009-06-26 19:10:36 +01001940 16MiB to make floppy (an ISA device) work.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001941
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001942config INTR_REMAP
1943 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
1944 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001945 ---help---
1946 Supports Interrupt remapping for IO-APIC and MSI devices.
1947 To use x2apic mode in the CPU's which support x2APIC enhancements or
1948 to support platforms with CPU's having > 8 bit APIC ID, say Y.
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001949
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001950source "drivers/pci/pcie/Kconfig"
1951
1952source "drivers/pci/Kconfig"
1953
1954# x86_64 have no ISA slots, but do have ISA-style DMA.
1955config ISA_DMA_API
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001956 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001957
1958if X86_32
1959
1960config ISA
1961 bool "ISA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001962 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001963 Find out whether you have ISA slots on your motherboard. ISA is the
1964 name of a bus system, i.e. the way the CPU talks to the other stuff
1965 inside your box. Other bus systems are PCI, EISA, MicroChannel
1966 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1967 newer boards don't support it. If you have ISA, say Y, otherwise N.
1968
1969config EISA
1970 bool "EISA support"
1971 depends on ISA
1972 ---help---
1973 The Extended Industry Standard Architecture (EISA) bus was
1974 developed as an open alternative to the IBM MicroChannel bus.
1975
1976 The EISA bus provided some of the features of the IBM MicroChannel
1977 bus while maintaining backward compatibility with cards made for
1978 the older ISA bus. The EISA bus saw limited use between 1988 and
1979 1995 when it was made obsolete by the PCI bus.
1980
1981 Say Y here if you are building a kernel for an EISA-based machine.
1982
1983 Otherwise, say N.
1984
1985source "drivers/eisa/Kconfig"
1986
1987config MCA
Ingo Molnar72ee6eb2009-01-27 16:57:49 +01001988 bool "MCA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001989 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001990 MicroChannel Architecture is found in some IBM PS/2 machines and
1991 laptops. It is a bus system similar to PCI or ISA. See
1992 <file:Documentation/mca.txt> (and especially the web page given
1993 there) before attempting to build an MCA bus kernel.
1994
1995source "drivers/mca/Kconfig"
1996
1997config SCx200
1998 tristate "NatSemi SCx200 support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001999 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002000 This provides basic support for National Semiconductor's
2001 (now AMD's) Geode processors. The driver probes for the
2002 PCI-IDs of several on-chip devices, so its a good dependency
2003 for other scx200_* drivers.
2004
2005 If compiled as a module, the driver is named scx200.
2006
2007config SCx200HR_TIMER
2008 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
2009 depends on SCx200 && GENERIC_TIME
2010 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002011 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002012 This driver provides a clocksource built upon the on-chip
2013 27MHz high-resolution timer. Its also a workaround for
2014 NSC Geode SC-1100's buggy TSC, which loses time when the
2015 processor goes idle (as is done by the scheduler). The
2016 other workaround is idle=poll boot option.
2017
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002018config OLPC
2019 bool "One Laptop Per Child support"
Andres Salomon3c554942009-12-14 18:00:36 -08002020 select GPIOLIB
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002021 default n
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002022 ---help---
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002023 Add support for detecting the unique features of the OLPC
2024 XO hardware.
2025
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01002026endif # X86_32
2027
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002028config K8_NB
2029 def_bool y
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01002030 depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA)))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002031
2032source "drivers/pcmcia/Kconfig"
2033
2034source "drivers/pci/hotplug/Kconfig"
2035
2036endmenu
2037
2038
2039menu "Executable file formats / Emulations"
2040
2041source "fs/Kconfig.binfmt"
2042
2043config IA32_EMULATION
2044 bool "IA32 Emulation"
2045 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01002046 select COMPAT_BINFMT_ELF
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002047 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002048 Include code to run 32-bit programs under a 64-bit kernel. You should
2049 likely turn this on, unless you're 100% sure that you don't have any
2050 32-bit programs left.
2051
2052config IA32_AOUT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002053 tristate "IA32 a.out support"
2054 depends on IA32_EMULATION
2055 ---help---
2056 Support old a.out binaries in the 32bit emulation.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002057
2058config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002059 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002060 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002061
2062config COMPAT_FOR_U64_ALIGNMENT
2063 def_bool COMPAT
2064 depends on X86_64
2065
2066config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002067 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04002068 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002069
2070endmenu
2071
2072
Keith Packarde5beae12008-11-03 18:21:45 +01002073config HAVE_ATOMIC_IOMAP
2074 def_bool y
2075 depends on X86_32
2076
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002077source "net/Kconfig"
2078
2079source "drivers/Kconfig"
2080
2081source "drivers/firmware/Kconfig"
2082
2083source "fs/Kconfig"
2084
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002085source "arch/x86/Kconfig.debug"
2086
2087source "security/Kconfig"
2088
2089source "crypto/Kconfig"
2090
Avi Kivityedf88412007-12-16 11:02:48 +02002091source "arch/x86/kvm/Kconfig"
2092
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002093source "lib/Kconfig"