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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 Molnar04da8a42009-08-11 10:40:08 +020027 select HAVE_PERF_COUNTERS 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
Frederic Weisbecker1b3fa2ce2009-03-07 05:53:00 +010041 select HAVE_FTRACE_SYSCALLS
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
Joerg Roedel2118d0c2009-01-09 15:13:15 +010048 select HAVE_DMA_API_DEBUG
H. Peter Anvin2e9f3bd2009-01-04 15:41:25 -080049 select HAVE_KERNEL_GZIP
50 select HAVE_KERNEL_BZIP2
51 select HAVE_KERNEL_LZMA
Pekka Enberg0a4af3b2009-02-26 21:38:56 +020052 select HAVE_ARCH_KMEMCHECK
Balbir Singh7d8330a2008-02-10 12:46:28 +053053
Linus Torvalds51b26ad2009-04-26 10:12:47 -070054config OUTPUT_FORMAT
55 string
56 default "elf32-i386" if X86_32
57 default "elf64-x86-64" if X86_64
58
Sam Ravnborg73531902008-05-25 23:03:18 +020059config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020060 string
Sam Ravnborg73531902008-05-25 23:03:18 +020061 default "arch/x86/configs/i386_defconfig" if X86_32
62 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020063
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010064config GENERIC_TIME
Harvey Harrison3c2362e2008-01-30 13:31:03 +010065 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010066
67config GENERIC_CMOS_UPDATE
Harvey Harrison3c2362e2008-01-30 13:31:03 +010068 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010069
70config CLOCKSOURCE_WATCHDOG
Harvey Harrison3c2362e2008-01-30 13:31:03 +010071 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010072
73config GENERIC_CLOCKEVENTS
Harvey Harrison3c2362e2008-01-30 13:31:03 +010074 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010075
76config GENERIC_CLOCKEVENTS_BROADCAST
Harvey Harrison3c2362e2008-01-30 13:31:03 +010077 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010078 depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
79
80config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010081 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010082
83config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010084 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010085
Heiko Carstensaa7d9352008-02-01 17:45:14 +010086config HAVE_LATENCYTOP_SUPPORT
87 def_bool y
88
Christoph Lameter1f842602008-01-07 23:20:30 -080089config FAST_CMPXCHG_LOCAL
90 bool
91 default y
92
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010093config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +010094 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010095
96config ZONE_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +010097 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010098
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010099config SBUS
100 bool
101
102config GENERIC_ISA_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100103 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100104
105config GENERIC_IOMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100106 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100107
108config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100109 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100110 depends on BUG
Jan Beulichb93a5312008-12-16 11:40:27 +0000111 select GENERIC_BUG_RELATIVE_POINTERS if X86_64
112
113config GENERIC_BUG_RELATIVE_POINTERS
114 bool
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100115
116config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100117 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100118
Florian Fainellia6082952008-01-30 13:33:35 +0100119config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -0700120 bool
Florian Fainellia6082952008-01-30 13:33:35 +0100121
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100122config ARCH_MAY_HAVE_PC_FDC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100123 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100124
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100125config RWSEM_GENERIC_SPINLOCK
126 def_bool !X86_XADD
127
128config RWSEM_XCHGADD_ALGORITHM
129 def_bool X86_XADD
130
Venki Pallipadia6869cc2008-02-08 17:05:44 -0800131config ARCH_HAS_CPU_IDLE_WAIT
132 def_bool y
133
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100134config GENERIC_CALIBRATE_DELAY
135 def_bool y
136
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100137config GENERIC_TIME_VSYSCALL
138 bool
139 default X86_64
140
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800141config ARCH_HAS_CPU_RELAX
142 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100143
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400144config ARCH_HAS_DEFAULT_IDLE
145 def_bool y
146
Pekka Enberg1b27d052008-04-28 02:12:22 -0700147config ARCH_HAS_CACHE_LINE_SIZE
148 def_bool y
149
Mike Travisdd5af902008-01-30 13:33:32 +0100150config HAVE_SETUP_PER_CPU_AREA
Brian Gerst89c9c4c2009-01-27 12:56:48 +0900151 def_bool y
travis@sgi.comb32ef632008-01-30 13:32:51 +0100152
Tejun Heo11124412009-02-20 16:29:09 +0900153config HAVE_DYNAMIC_PER_CPU_AREA
154 def_bool y
155
Mike Travis9f0e8d02008-04-04 18:11:01 -0700156config HAVE_CPUMASK_OF_CPU_MAP
157 def_bool X86_64_SMP
158
Johannes Berg801e4062007-12-08 02:12:39 +0100159config ARCH_HIBERNATION_POSSIBLE
160 def_bool y
Johannes Berg801e4062007-12-08 02:12:39 +0100161
Johannes Bergf4cb5702007-12-08 02:14:00 +0100162config ARCH_SUSPEND_POSSIBLE
163 def_bool y
Johannes Bergf4cb5702007-12-08 02:14:00 +0100164
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100165config ZONE_DMA32
166 bool
167 default X86_64
168
169config ARCH_POPULATES_NODE_MAP
170 def_bool y
171
172config AUDIT_ARCH
173 bool
174 default X86_64
175
Ingo Molnar765c68b2008-04-09 11:03:37 +0200176config ARCH_SUPPORTS_OPTIMIZED_INLINING
177 def_bool y
178
Akinobu Mita6a11f752009-03-31 15:23:17 -0700179config ARCH_SUPPORTS_DEBUG_PAGEALLOC
180 def_bool y
181
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100182# Use the generic interrupt handling code in kernel/irq/:
183config GENERIC_HARDIRQS
184 bool
185 default y
186
Thomas Gleixnerf9a36fa2009-03-13 16:37:48 +0100187config GENERIC_HARDIRQS_NO__DO_IRQ
188 def_bool y
189
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100190config GENERIC_IRQ_PROBE
191 bool
192 default y
193
194config GENERIC_PENDING_IRQ
195 bool
196 depends on GENERIC_HARDIRQS && SMP
197 default y
198
James Bottomley6cd10f82008-11-09 11:53:14 -0600199config USE_GENERIC_SMP_HELPERS
200 def_bool y
201 depends on SMP
202
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100203config X86_32_SMP
204 def_bool y
205 depends on X86_32 && SMP
206
207config X86_64_SMP
208 def_bool y
209 depends on X86_64 && SMP
210
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100211config X86_HT
212 bool
Adrian Bunkee0011a2007-12-04 17:19:07 +0100213 depends on SMP
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100214 default y
215
216config X86_TRAMPOLINE
217 bool
Ingo Molnar3e5095d2009-01-27 17:07:08 +0100218 depends on SMP || (64BIT && ACPI_SLEEP)
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100219 default y
220
Tejun Heoccbeed32009-02-09 22:17:40 +0900221config X86_32_LAZY_GS
222 def_bool y
Tejun Heo60a53172009-02-09 22:17:40 +0900223 depends on X86_32 && !CC_STACKPROTECTOR
Tejun Heoccbeed32009-02-09 22:17:40 +0900224
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100225config KTIME_SCALAR
226 def_bool X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100227source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700228source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100229
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100230menu "Processor type and features"
231
232source "kernel/time/Kconfig"
233
234config SMP
235 bool "Symmetric multi-processing support"
236 ---help---
237 This enables support for systems with more than one CPU. If you have
238 a system with only one CPU, like most personal computers, say N. If
239 you have a system with more than one CPU, say Y.
240
241 If you say N here, the kernel will run on single and multiprocessor
242 machines, but will use only one CPU of a multiprocessor machine. If
243 you say Y here, the kernel will run on many, but not all,
244 singleprocessor machines. On a singleprocessor machine, the kernel
245 will run faster if you say N here.
246
247 Note that if you say Y here and choose architecture "586" or
248 "Pentium" under "Processor family", the kernel will not work on 486
249 architectures. Similarly, multiprocessor kernels for the "PPro"
250 architecture may not work on all Pentium based boards.
251
252 People using multiprocessor machines who say Y here should also say
253 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
254 Management" code will be disabled if you say Y here.
255
Adrian Bunk03502fa2008-02-03 15:50:21 +0200256 See also <file:Documentation/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100257 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
258 <http://www.tldp.org/docs.html#howto>.
259
260 If you don't know what to do here, say N.
261
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800262config X86_X2APIC
263 bool "Support x2apic"
David Woodhousef7d7f862009-04-06 23:04:40 -0700264 depends on X86_LOCAL_APIC && X86_64 && INTR_REMAP
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800265 ---help---
266 This enables x2apic support on CPUs that have this feature.
267
268 This allows 32-bit apic IDs (so it can support very large systems),
269 and accesses the local apic via MSRs not via mmio.
270
Yinghai Lu06cd9a72009-02-16 17:29:58 -0800271 If you don't know what to do here, say N.
272
Yinghai Lu0b8f1ef2008-12-05 18:58:31 -0800273config SPARSE_IRQ
274 bool "Support sparse irq numbering"
Yinghai Lu17483a12008-12-12 13:14:18 -0800275 depends on PCI_MSI || HT_IRQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100276 ---help---
Ingo Molnar973656f2008-12-25 16:26:47 +0100277 This enables support for sparse irqs. This is useful for distro
278 kernels that want to define a high CONFIG_NR_CPUS value but still
279 want to have low kernel memory footprint on smaller machines.
Yinghai Lu0b8f1ef2008-12-05 18:58:31 -0800280
Ingo Molnar973656f2008-12-25 16:26:47 +0100281 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
282 out the irq_desc[] array in a more NUMA-friendly way. )
283
284 If you don't know what to do here, say N.
Yinghai Lu0b8f1ef2008-12-05 18:58:31 -0800285
Yinghai Lu15e957d2009-04-30 01:17:50 -0700286config NUMA_IRQ_DESC
287 def_bool y
Yinghai Lub9098952008-12-19 13:48:34 -0800288 depends on SPARSE_IRQ && NUMA
Yinghai Lu48a1b102008-12-11 00:15:01 -0800289
Yinghai Lu6695c852008-06-19 12:13:09 -0700290config X86_MPPARSE
Jan Beulich7a527682008-10-30 10:38:24 +0000291 bool "Enable MPS table" if ACPI
292 default y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200293 depends on X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100294 ---help---
Yinghai Lu6695c852008-06-19 12:13:09 -0700295 For old smp systems that do not have proper acpi support. Newer systems
296 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
Yinghai Lu6695c852008-06-19 12:13:09 -0700297
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800298config X86_BIGSMP
299 bool "Support for big SMP systems with more than 8 CPUs"
300 depends on X86_32 && SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100301 ---help---
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800302 This option is needed for the systems that have more than 8 CPUs
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100303
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800304if X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800305config X86_EXTENDED_PLATFORM
306 bool "Support for extended (non-PC) x86 platforms"
307 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100308 ---help---
Ingo Molnar06ac8342009-01-27 18:11:43 +0100309 If you disable this option then the kernel will only support
310 standard PC platforms. (which covers the vast majority of
311 systems out there.)
312
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800313 If you enable this option then you'll be able to select support
314 for the following (non-PC) 32 bit x86 platforms:
315 AMD Elan
316 NUMAQ (IBM/Sequent)
317 RDC R-321x SoC
318 SGI 320/540 (Visual Workstation)
319 Summit/EXA (IBM x440)
320 Unisys ES7000 IA32 series
Ingo Molnar06ac8342009-01-27 18:11:43 +0100321
322 If you have one of these systems, or if you want to build a
323 generic distribution kernel, say Y here - otherwise say N.
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800324endif
Ingo Molnar06ac8342009-01-27 18:11:43 +0100325
Ravikiran G Thirumalai84250912009-02-20 16:59:11 -0800326if X86_64
327config X86_EXTENDED_PLATFORM
328 bool "Support for extended (non-PC) x86 platforms"
329 default y
330 ---help---
331 If you disable this option then the kernel will only support
332 standard PC platforms. (which covers the vast majority of
333 systems out there.)
334
335 If you enable this option then you'll be able to select support
336 for the following (non-PC) 64 bit x86 platforms:
337 ScaleMP vSMP
338 SGI Ultraviolet
339
340 If you have one of these systems, or if you want to build a
341 generic distribution kernel, say Y here - otherwise say N.
342endif
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800343# This is an alphabetically sorted list of 64 bit extended platforms
344# Please maintain the alphabetic order if and when there are additions
Nick Piggin03b48632009-01-20 04:36:04 +0100345
Ingo Molnar6a485652009-01-27 18:29:13 +0100346config X86_VSMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800347 bool "ScaleMP vSMP"
Ingo Molnar6a485652009-01-27 18:29:13 +0100348 select PARAVIRT
349 depends on X86_64 && PCI
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800350 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100351 ---help---
Ingo Molnar6a485652009-01-27 18:29:13 +0100352 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
353 supposed to run on these EM64T-based machines. Only choose this option
354 if you have one of these machines.
355
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800356config X86_UV
357 bool "SGI Ultraviolet"
358 depends on X86_64
359 depends on X86_EXTENDED_PLATFORM
Jack Steiner54c28d22009-04-03 15:39:42 -0500360 depends on NUMA
Suresh Siddha9d6c26e2009-04-20 13:02:31 -0700361 depends on X86_X2APIC
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800362 ---help---
363 This option is needed in order to support SGI Ultraviolet systems.
364 If you don't have one of these, you should say N here.
365
366# Following is an alphabetically sorted list of 32 bit extended platforms
367# Please maintain the alphabetic order if and when there are additions
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100368
369config X86_ELAN
370 bool "AMD Elan"
371 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800372 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100373 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100374 Select this for an AMD Elan processor.
375
376 Do not use this option for K6/Athlon/Opteron processors!
377
378 If unsure, choose "PC-compatible" instead.
379
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800380config X86_RDC321X
381 bool "RDC R-321x SoC"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100382 depends on X86_32
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800383 depends on X86_EXTENDED_PLATFORM
384 select M486
385 select X86_REBOOTFIXUPS
386 ---help---
387 This option is needed for RDC R-321x system-on-chip, also known
388 as R-8610-(G).
389 If you don't have one of these chips, you should say N here.
390
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100391config X86_32_NON_STANDARD
Ingo Molnar9c398012009-01-27 18:24:57 +0100392 bool "Support non-standard 32-bit SMP architectures"
393 depends on X86_32 && SMP
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800394 depends on X86_EXTENDED_PLATFORM
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100395 ---help---
396 This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
Yinghai Lud49c4282008-06-08 18:31:54 -0700397 subarchitectures. It is intended for a generic binary kernel.
398 if you select them all, kernel will probe it one by one. and will
399 fallback to default.
400
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800401# Alphabetically sorted list of Non standard 32 bit platforms
Yinghai Lud49c4282008-06-08 18:31:54 -0700402
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100403config X86_NUMAQ
404 bool "NUMAQ (IBM/Sequent)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100405 depends on X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100406 select NUMA
Ingo Molnar9c398012009-01-27 18:24:57 +0100407 select X86_MPPARSE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100408 ---help---
Yinghai Lud49c4282008-06-08 18:31:54 -0700409 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
410 NUMA multiquad box. This changes the way that processors are
411 bootstrapped, and uses Clustered Logical APIC addressing mode instead
412 of Flat Logical. You will need a new lynxer.elf file to flash your
413 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100414
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200415config X86_VISWS
416 bool "SGI 320/540 (Visual Workstation)"
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800417 depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
418 depends on X86_32_NON_STANDARD
419 ---help---
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200420 The SGI Visual Workstation series is an IA32-based workstation
421 based on SGI systems chips with some legacy PC hardware attached.
422
423 Say Y here to create a kernel to run on the SGI 320 or 540.
424
425 A kernel compiled for the Visual Workstation will run on general
426 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
427
Ingo Molnar9c398012009-01-27 18:24:57 +0100428config X86_SUMMIT
429 bool "Summit/EXA (IBM x440)"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100430 depends on X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100431 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100432 This option is needed for IBM systems that use the Summit/EXA chipset.
433 In particular, it is needed for the x440.
Ingo Molnar1f972762008-07-26 13:52:50 +0200434
Ingo Molnar9c398012009-01-27 18:24:57 +0100435config X86_ES7000
Ravikiran G Thirumalaic5c606d2009-02-09 18:18:14 -0800436 bool "Unisys ES7000 IA32 series"
Yinghai Lu26f7ef12009-01-29 14:19:22 -0800437 depends on X86_32_NON_STANDARD && X86_BIGSMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100438 ---help---
Ingo Molnar9c398012009-01-27 18:24:57 +0100439 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
440 supposed to run on an IA32-based Unisys ES7000 system.
441
Ingo Molnarae1e9132008-11-11 09:05:16 +0100442config SCHED_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100443 def_bool y
444 prompt "Single-depth WCHAN output"
Ken Chena87d0912008-11-06 11:10:49 -0800445 depends on X86
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100446 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100447 Calculate simpler /proc/<PID>/wchan values. If this option
448 is disabled then wchan values will recurse back to the
449 caller function. This provides more accurate wchan values,
450 at the expense of slightly more scheduling overhead.
451
452 If in doubt, say "Y".
453
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100454menuconfig PARAVIRT_GUEST
455 bool "Paravirtualized guest support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100456 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100457 Say Y here to get to see options related to running Linux under
458 various hypervisors. This option alone does not add any kernel code.
459
460 If you say N, all options in this submenu will be skipped and disabled.
461
462if PARAVIRT_GUEST
463
464source "arch/x86/xen/Kconfig"
465
466config VMI
467 bool "VMI Guest support"
468 select PARAVIRT
Eduardo Pereira Habkost42d545c2008-01-30 13:33:32 +0100469 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100470 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100471 VMI provides a paravirtualized interface to the VMware ESX server
472 (it could be used by other hypervisors in theory too, but is not
473 at the moment), by linking the kernel to a GPL-ed ROM module
474 provided by the hypervisor.
475
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200476config KVM_CLOCK
477 bool "KVM paravirtualized clock"
478 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200479 select PARAVIRT_CLOCK
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100480 ---help---
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200481 Turning on this option will allow you to run a paravirtualized clock
482 when running over the KVM hypervisor. Instead of relying on a PIT
483 (or probably other) emulation by the underlying device model, the host
484 provides the guest with timing infrastructure such as time of day, and
485 system time
486
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500487config KVM_GUEST
488 bool "KVM Guest support"
489 select PARAVIRT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100490 ---help---
491 This option enables various optimizations for running under the KVM
492 hypervisor.
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500493
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100494source "arch/x86/lguest/Kconfig"
495
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100496config PARAVIRT
497 bool "Enable paravirtualization code"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100498 ---help---
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100499 This changes the kernel so it can modify itself when it is run
500 under a hypervisor, potentially improving performance significantly
501 over full virtualization. However, when run without a hypervisor
502 the kernel is theoretically slower and slightly larger.
503
Jeremy Fitzhardingeb4ecc122009-05-13 17:16:55 -0700504config PARAVIRT_SPINLOCKS
505 bool "Paravirtualization layer for spinlocks"
506 depends on PARAVIRT && SMP && EXPERIMENTAL
507 ---help---
508 Paravirtualized spinlocks allow a pvops backend to replace the
509 spinlock implementation with something virtualization-friendly
510 (for example, block the virtual CPU rather than spinning).
511
512 Unfortunately the downside is an up to 5% performance hit on
513 native kernels, with various workloads.
514
515 If you are unsure how to answer this question, answer N.
516
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200517config PARAVIRT_CLOCK
518 bool
519 default n
520
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100521endif
522
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400523config PARAVIRT_DEBUG
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100524 bool "paravirt-ops debugging"
525 depends on PARAVIRT && DEBUG_KERNEL
526 ---help---
527 Enable to debug paravirt_ops internals. Specifically, BUG if
528 a paravirt_op is missing when it is called.
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400529
Yinghai Lu03273182008-04-18 17:49:15 -0700530config MEMTEST
531 bool "Memtest"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100532 ---help---
Yinghai Luc64df702008-03-21 18:56:19 -0700533 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700534 to be set.
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100535 memtest=0, mean disabled; -- default
536 memtest=1, mean do 1 test pattern;
537 ...
538 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200539 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100540
541config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100542 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100543 depends on X86_32 && NUMA && X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100544
545config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100546 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100547 depends on X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100548
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100549source "arch/x86/Kconfig.cpu"
550
551config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100552 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100553 prompt "HPET Timer Support" if X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100554 ---help---
555 Use the IA-PC HPET (High Precision Event Timer) to manage
556 time in preference to the PIT and RTC, if a HPET is
557 present.
558 HPET is the next generation timer replacing legacy 8254s.
559 The HPET provides a stable time base on SMP
560 systems, unlike the TSC, but it is more expensive to access,
561 as it is off-chip. You can find the HPET spec at
562 <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100563
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100564 You can safely choose Y here. However, HPET will only be
565 activated if the platform and the BIOS support this feature.
566 Otherwise the 8254 will be used for timing services.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100567
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100568 Choose N to continue using the legacy 8254 timer.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100569
570config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100571 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800572 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100573
574# Mark as embedded because too many people got it wrong.
575# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700576config DMI
577 default y
578 bool "Enable DMI scanning" if EMBEDDED
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100579 ---help---
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700580 Enabled scanning of DMI to identify machine quirks. Say Y
581 here unless you have verified that your setup is not
582 affected by entries in the DMI blacklist. Required by PNP
583 BIOS code.
584
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100585config GART_IOMMU
586 bool "GART IOMMU support" if EMBEDDED
587 default y
588 select SWIOTLB
589 select AGP
590 depends on X86_64 && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100591 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100592 Support for full DMA access of devices with 32bit memory access only
593 on systems with more than 3GB. This is usually needed for USB,
594 sound, many IDE/SATA chipsets and some other devices.
595 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
596 based hardware IOMMU and a software bounce buffer based IOMMU used
597 on Intel systems and as fallback.
598 The code is only active when needed (enough memory and limited
599 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
600 too.
601
602config CALGARY_IOMMU
603 bool "IBM Calgary IOMMU support"
604 select SWIOTLB
605 depends on X86_64 && PCI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100606 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100607 Support for hardware IOMMUs in IBM's xSeries x366 and x460
608 systems. Needed to run systems with more than 3GB of memory
609 properly with 32-bit PCI devices that do not support DAC
610 (Double Address Cycle). Calgary also supports bus level
611 isolation, where all DMAs pass through the IOMMU. This
612 prevents them from going anywhere except their intended
613 destination. This catches hard-to-find kernel bugs and
614 mis-behaving drivers and devices that do not use the DMA-API
615 properly to set up their DMA buffers. The IOMMU can be
616 turned off at boot time with the iommu=off parameter.
617 Normally the kernel will make the right choice by itself.
618 If unsure, say Y.
619
620config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100621 def_bool y
622 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100623 depends on CALGARY_IOMMU
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100624 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100625 Should Calgary be enabled by default? if you choose 'y', Calgary
626 will be used (if it exists). If you choose 'n', Calgary will not be
627 used even if it exists. If you choose 'n' and would like to use
628 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
629 If unsure, say Y.
630
Joerg Roedel2b188722008-06-26 21:27:37 +0200631config AMD_IOMMU
632 bool "AMD IOMMU support"
Ingo Molnar07c40e82008-06-27 11:31:28 +0200633 select SWIOTLB
Joerg Roedela80dc3e2008-09-11 16:51:41 +0200634 select PCI_MSI
Ingo Molnar24d2ba02008-06-27 10:37:03 +0200635 depends on X86_64 && PCI && ACPI
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100636 ---help---
Joerg Roedel18d22202008-07-03 19:35:06 +0200637 With this option you can enable support for AMD IOMMU hardware in
638 your system. An IOMMU is a hardware component which provides
639 remapping of DMA memory accesses from devices. With an AMD IOMMU you
640 can isolate the the DMA memory of different devices and protect the
641 system from misbehaving device drivers or hardware.
642
643 You can find out if your system has an AMD IOMMU if you look into
644 your BIOS for an option to enable it or if you have an IVRS ACPI
645 table.
Joerg Roedel2b188722008-06-26 21:27:37 +0200646
Joerg Roedel2e117602008-12-11 19:00:12 +0100647config AMD_IOMMU_STATS
648 bool "Export AMD IOMMU statistics to debugfs"
649 depends on AMD_IOMMU
650 select DEBUG_FS
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100651 ---help---
Joerg Roedel2e117602008-12-11 19:00:12 +0100652 This option enables code in the AMD IOMMU driver to collect various
653 statistics about whats happening in the driver and exports that
654 information to userspace via debugfs.
655 If unsure, say N.
656
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100657# need this always selected by IOMMU for the VIA workaround
658config SWIOTLB
Joerg Roedela1afd012008-11-18 12:44:21 +0100659 def_bool y if X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100660 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100661 Support for software bounce buffers used on x86-64 systems
662 which don't have a hardware IOMMU (e.g. the current generation
663 of Intel's x86-64 CPUs). Using this PCI devices which can only
664 access 32-bits of memory can be used on systems with more than
665 3 GB of memory. If unsure, say Y.
666
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700667config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900668 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700669
Joerg Roedel1aaf1182008-11-26 17:25:13 +0100670config IOMMU_API
671 def_bool (AMD_IOMMU || DMAR)
672
Mike Travis1184dc22008-05-12 21:21:12 +0200673config MAXSMP
674 bool "Configure Maximum number of SMP Processors and NUMA Nodes"
Mike Travis36f51012008-12-16 17:33:51 -0800675 depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
676 select CPUMASK_OFFSTACK
Mike Travis1184dc22008-05-12 21:21:12 +0200677 default n
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100678 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +0200679 Configure maximum number of CPUS and NUMA Nodes for this architecture.
680 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100681
682config NR_CPUS
Mike Travis36f51012008-12-16 17:33:51 -0800683 int "Maximum number of CPUs" if SMP && !MAXSMP
Michael K. Johnson2a3313f2009-04-21 21:44:48 -0400684 range 2 8 if SMP && X86_32 && !X86_BIGSMP
Mike Travis36f51012008-12-16 17:33:51 -0800685 range 2 512 if SMP && !MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800686 default "1" if !SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700687 default "4096" if MAXSMP
Mike Travis78637a972008-12-16 17:34:00 -0800688 default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
689 default "8" if SMP
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100690 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100691 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700692 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100693 minimum value which makes sense is 2.
694
695 This is purely to save memory - each supported CPU adds
696 approximately eight kilobytes to the kernel image.
697
698config SCHED_SMT
699 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800700 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100701 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100702 SMT scheduler support improves the CPU scheduler's decision making
703 when dealing with Intel Pentium 4 chips with HyperThreading at a
704 cost of slightly increased overhead in some places. If unsure say
705 N here.
706
707config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100708 def_bool y
709 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800710 depends on X86_HT
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100711 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100712 Multi-core scheduler support improves the CPU scheduler's decision
713 making when dealing with multi-core CPU chips at a cost of slightly
714 increased overhead in some places. If unsure say N here.
715
716source "kernel/Kconfig.preempt"
717
718config X86_UP_APIC
719 bool "Local APIC support on uniprocessors"
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100720 depends on X86_32 && !SMP && !X86_32_NON_STANDARD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100721 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100722 A local APIC (Advanced Programmable Interrupt Controller) is an
723 integrated interrupt controller in the CPU. If you have a single-CPU
724 system which has a processor with a local APIC, you can say Y here to
725 enable and use it. If you say Y here even though your machine doesn't
726 have a local APIC, then the kernel will still run with no slowdown at
727 all. The local APIC supports CPU-generated self-interrupts (timer,
728 performance counters), and the NMI watchdog which detects hard
729 lockups.
730
731config X86_UP_IOAPIC
732 bool "IO-APIC support on uniprocessors"
733 depends on X86_UP_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100734 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100735 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
736 SMP-capable replacement for PC-style interrupt controllers. Most
737 SMP systems and many recent uniprocessor systems have one.
738
739 If you have a single-CPU system with an IO-APIC, you can say Y here
740 to use it. If you say Y here even though your machine doesn't have
741 an IO-APIC, then the kernel will still run with no slowdown at all.
742
743config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100744 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100745 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100746
747config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100748 def_bool y
Ingo Molnare0c7ae32009-01-27 18:43:09 +0100749 depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100750
751config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100752 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100753 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100754
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200755config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
756 bool "Reroute for broken boot IRQs"
757 default n
758 depends on X86_IO_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100759 ---help---
Stefan Assmann41b9eb22008-07-15 13:48:55 +0200760 This option enables a workaround that fixes a source of
761 spurious interrupts. This is recommended when threaded
762 interrupt handling is used on systems where the generation of
763 superfluous "boot interrupts" cannot be disabled.
764
765 Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
766 entry in the chipset's IO-APIC is masked (as, e.g. the RT
767 kernel does during interrupt handling). On chipsets where this
768 boot IRQ generation cannot be disabled, this workaround keeps
769 the original IRQ line masked so that only the equivalent "boot
770 IRQ" is delivered to the CPUs. The workaround also tells the
771 kernel to set up the IRQ handler on the boot IRQ line. In this
772 way only one interrupt is delivered to the kernel. Otherwise
773 the spurious second interrupt may cause the kernel to bring
774 down (vital) interrupt lines.
775
776 Only affects "broken" chipsets. Interrupt sharing may be
777 increased on these systems.
778
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100779config X86_MCE
780 bool "Machine Check Exception"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100781 ---help---
782 Machine Check Exception support allows the processor to notify the
783 kernel if it detects a problem (e.g. overheating, component failure).
784 The action the kernel takes depends on the severity of the problem,
785 ranging from a warning message on the console, to halting the machine.
786 Your processor must be a Pentium or newer to support this - check the
787 flags in /proc/cpuinfo for mce. Note that some older Pentium systems
788 have a design flaw which leads to false MCE events - hence MCE is
789 disabled on all P5 processors, unless explicitly enabled with "mce"
790 as a boot argument. Similarly, if MCE is built in and creates a
791 problem on some new non-standard machine, you can boot with "nomce"
792 to disable it. MCE support simply ignores non-MCE processors like
793 the 386 and 486, so nearly everyone can say Y here.
794
Andi Kleen4efc0672009-04-28 19:07:31 +0200795config X86_OLD_MCE
796 depends on X86_32 && X86_MCE
797 bool "Use legacy machine check code (will go away)"
798 default n
799 select X86_ANCIENT_MCE
800 ---help---
801 Use the old i386 machine check code. This is merely intended for
802 testing in a transition period. Try this if you run into any machine
803 check related software problems, but report the problem to
804 linux-kernel. When in doubt say no.
805
806config X86_NEW_MCE
807 depends on X86_MCE
808 bool
809 default y if (!X86_OLD_MCE && X86_32) || X86_64
810
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100811config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100812 def_bool y
813 prompt "Intel MCE features"
Andi Kleen7856f6c2009-04-28 23:32:56 +0200814 depends on X86_NEW_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100815 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100816 Additional support for intel specific MCE features such as
817 the thermal monitor.
818
819config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100820 def_bool y
821 prompt "AMD MCE features"
Andi Kleende5619d2009-04-28 23:34:40 +0200822 depends on X86_NEW_MCE && X86_LOCAL_APIC
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100823 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100824 Additional support for AMD specific MCE features such as
825 the DRAM Error Threshold.
826
Andi Kleen4efc0672009-04-28 19:07:31 +0200827config X86_ANCIENT_MCE
Hidetoshi Setocd13adcc2009-05-27 16:57:31 +0900828 def_bool n
829 depends on X86_32
830 prompt "Support for old Pentium 5 / WinChip machine checks"
831 ---help---
832 Include support for machine check handling on old Pentium 5 or WinChip
833 systems. These typically need to be enabled explicitely on the command
834 line.
Andi Kleen4efc0672009-04-28 19:07:31 +0200835
Andi Kleenb2762682009-02-12 13:49:31 +0100836config X86_MCE_THRESHOLD
837 depends on X86_MCE_AMD || X86_MCE_INTEL
838 bool
839 default y
840
Andi Kleenea149b32009-04-29 19:31:00 +0200841config X86_MCE_INJECT
842 depends on X86_NEW_MCE
843 tristate "Machine check injector support"
844 ---help---
845 Provide support for injecting machine checks for testing purposes.
846 If you don't know what a machine check is and you don't do kernel
847 QA it is safe to say n.
848
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100849config X86_MCE_NONFATAL
850 tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
Andi Kleen4efc0672009-04-28 19:07:31 +0200851 depends on X86_OLD_MCE
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100852 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100853 Enabling this feature starts a timer that triggers every 5 seconds which
854 will look at the machine check registers to see if anything happened.
855 Non-fatal problems automatically get corrected (but still logged).
856 Disable this if you don't want to see these messages.
857 Seeing the messages this option prints out may be indicative of dying
858 or out-of-spec (ie, overclocked) hardware.
859 This option only does something on certain CPUs.
860 (AMD Athlon/Duron and Intel Pentium 4)
861
862config X86_MCE_P4THERMAL
863 bool "check for P4 thermal throttling interrupt."
Andi Kleen4efc0672009-04-28 19:07:31 +0200864 depends on X86_OLD_MCE && X86_MCE && (X86_UP_APIC || SMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100865 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100866 Enabling this feature will cause a message to be printed when the P4
867 enters thermal throttling.
868
Andi Kleen4efc0672009-04-28 19:07:31 +0200869config X86_THERMAL_VECTOR
870 def_bool y
871 depends on X86_MCE_P4THERMAL || X86_MCE_INTEL
872
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100873config VM86
874 bool "Enable VM86 support" if EMBEDDED
875 default y
876 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100877 ---help---
878 This option is required by programs like DOSEMU to run 16-bit legacy
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100879 code on X86 processors. It also may be needed by software like
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100880 XFree86 to initialize some video cards via BIOS. Disabling this
881 option saves about 6k.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100882
883config TOSHIBA
884 tristate "Toshiba Laptop support"
885 depends on X86_32
886 ---help---
887 This adds a driver to safely access the System Management Mode of
888 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
889 not work on models with a Phoenix BIOS. The System Management Mode
890 is used to set the BIOS and power saving options on Toshiba portables.
891
892 For information on utilities to make use of this driver see the
893 Toshiba Linux utilities web site at:
894 <http://www.buzzard.org.uk/toshiba/>.
895
896 Say Y if you intend to run this kernel on a Toshiba portable.
897 Say N otherwise.
898
899config I8K
900 tristate "Dell laptop support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100901 ---help---
902 This adds a driver to safely access the System Management Mode
903 of the CPU on the Dell Inspiron 8000. The System Management Mode
904 is used to read cpu temperature and cooling fan status and to
905 control the fans on the I8K portables.
906
907 This driver has been tested only on the Inspiron 8000 but it may
908 also work with other Dell laptops. You can force loading on other
909 models by passing the parameter `force=1' to the module. Use at
910 your own risk.
911
912 For information on utilities to make use of this driver see the
913 I8K Linux utilities web site at:
914 <http://people.debian.org/~dz/i8k/>
915
916 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
917 Say N otherwise.
918
919config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700920 bool "Enable X86 board specific fixups for reboot"
921 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100922 ---help---
923 This enables chipset and/or board specific fixups to be done
924 in order to get reboot to work correctly. This is only needed on
925 some combinations of hardware and BIOS. The symptom, for which
926 this config is intended, is when reboot ends with a stalled/hung
927 system.
928
929 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100930 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100931
932 Say Y if you want to enable the fixup. Currently, it's safe to
933 enable this option even if you don't need it.
934 Say N otherwise.
935
936config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200937 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100938 select FW_LOADER
939 ---help---
940 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200941 certain Intel and AMD processors. The Intel support is for the
942 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
943 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
944 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
945 You will obviously need the actual microcode binary data itself
946 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100947
Peter Oruba8d86f392008-07-28 18:44:21 +0200948 This option selects the general module only, you need to select
949 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100950
951 To compile this driver as a module, choose M here: the
952 module will be called microcode.
953
Peter Oruba8d86f392008-07-28 18:44:21 +0200954config MICROCODE_INTEL
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100955 bool "Intel microcode patch loading support"
956 depends on MICROCODE
957 default MICROCODE
958 select FW_LOADER
959 ---help---
960 This options enables microcode patch loading support for Intel
961 processors.
Peter Oruba8d86f392008-07-28 18:44:21 +0200962
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100963 For latest news and information on obtaining all the required
964 Intel ingredients for this driver, check:
965 <http://www.urbanmyth.org/microcode/>.
Peter Oruba8d86f392008-07-28 18:44:21 +0200966
Peter Oruba80cc9f12008-07-28 18:44:22 +0200967config MICROCODE_AMD
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100968 bool "AMD microcode patch loading support"
969 depends on MICROCODE
970 select FW_LOADER
971 ---help---
972 If you select this option, microcode patch loading support for AMD
973 processors will be enabled.
Peter Oruba80cc9f12008-07-28 18:44:22 +0200974
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100975config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100976 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100977 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100978
979config X86_MSR
980 tristate "/dev/cpu/*/msr - Model-specific register support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100981 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100982 This device gives privileged processes access to the x86
983 Model-Specific Registers (MSRs). It is a character device with
984 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
985 MSR accesses are directed to a specific CPU on multi-processor
986 systems.
987
988config X86_CPUID
989 tristate "/dev/cpu/*/cpuid - CPU information support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +0100990 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100991 This device gives processes access to the x86 CPUID instruction to
992 be executed on a specific processor. It is a character device
993 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
994 /dev/cpu/31/cpuid.
995
Jaswinder Singh Rajput9b779ed2009-03-10 15:37:51 +0530996config X86_CPU_DEBUG
997 tristate "/sys/kernel/debug/x86/cpu/* - CPU Debug support"
998 ---help---
999 If you select this option, this will provide various x86 CPUs
1000 information through debugfs.
1001
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001002choice
1003 prompt "High Memory Support"
1004 default HIGHMEM4G if !X86_NUMAQ
1005 default HIGHMEM64G if X86_NUMAQ
1006 depends on X86_32
1007
1008config NOHIGHMEM
1009 bool "off"
1010 depends on !X86_NUMAQ
1011 ---help---
1012 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
1013 However, the address space of 32-bit x86 processors is only 4
1014 Gigabytes large. That means that, if you have a large amount of
1015 physical memory, not all of it can be "permanently mapped" by the
1016 kernel. The physical memory that's not permanently mapped is called
1017 "high memory".
1018
1019 If you are compiling a kernel which will never run on a machine with
1020 more than 1 Gigabyte total physical RAM, answer "off" here (default
1021 choice and suitable for most users). This will result in a "3GB/1GB"
1022 split: 3GB are mapped so that each process sees a 3GB virtual memory
1023 space and the remaining part of the 4GB virtual memory space is used
1024 by the kernel to permanently map as much physical memory as
1025 possible.
1026
1027 If the machine has between 1 and 4 Gigabytes physical RAM, then
1028 answer "4GB" here.
1029
1030 If more than 4 Gigabytes is used then answer "64GB" here. This
1031 selection turns Intel PAE (Physical Address Extension) mode on.
1032 PAE implements 3-level paging on IA32 processors. PAE is fully
1033 supported by Linux, PAE mode is implemented on all recent Intel
1034 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
1035 then the kernel will not boot on CPUs that don't support PAE!
1036
1037 The actual amount of total physical memory will either be
1038 auto detected or can be forced by using a kernel command line option
1039 such as "mem=256M". (Try "man bootparam" or see the documentation of
1040 your boot loader (lilo or loadlin) about how to pass options to the
1041 kernel at boot time.)
1042
1043 If unsure, say "off".
1044
1045config HIGHMEM4G
1046 bool "4GB"
1047 depends on !X86_NUMAQ
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001048 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001049 Select this if you have a 32-bit processor and between 1 and 4
1050 gigabytes of physical RAM.
1051
1052config HIGHMEM64G
1053 bool "64GB"
1054 depends on !M386 && !M486
1055 select X86_PAE
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001056 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001057 Select this if you have a 32-bit processor and more than 4
1058 gigabytes of physical RAM.
1059
1060endchoice
1061
1062choice
1063 depends on EXPERIMENTAL
1064 prompt "Memory split" if EMBEDDED
1065 default VMSPLIT_3G
1066 depends on X86_32
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001067 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001068 Select the desired split between kernel and user memory.
1069
1070 If the address range available to the kernel is less than the
1071 physical memory installed, the remaining memory will be available
1072 as "high memory". Accessing high memory is a little more costly
1073 than low memory, as it needs to be mapped into the kernel first.
1074 Note that increasing the kernel address space limits the range
1075 available to user programs, making the address space there
1076 tighter. Selecting anything other than the default 3G/1G split
1077 will also likely make your kernel incompatible with binary-only
1078 kernel modules.
1079
1080 If you are not absolutely sure what you are doing, leave this
1081 option alone!
1082
1083 config VMSPLIT_3G
1084 bool "3G/1G user/kernel split"
1085 config VMSPLIT_3G_OPT
1086 depends on !X86_PAE
1087 bool "3G/1G user/kernel split (for full 1G low memory)"
1088 config VMSPLIT_2G
1089 bool "2G/2G user/kernel split"
1090 config VMSPLIT_2G_OPT
1091 depends on !X86_PAE
1092 bool "2G/2G user/kernel split (for full 2G low memory)"
1093 config VMSPLIT_1G
1094 bool "1G/3G user/kernel split"
1095endchoice
1096
1097config PAGE_OFFSET
1098 hex
1099 default 0xB0000000 if VMSPLIT_3G_OPT
1100 default 0x80000000 if VMSPLIT_2G
1101 default 0x78000000 if VMSPLIT_2G_OPT
1102 default 0x40000000 if VMSPLIT_1G
1103 default 0xC0000000
1104 depends on X86_32
1105
1106config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001107 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001108 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001109
1110config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -07001111 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001112 depends on X86_32 && !HIGHMEM4G
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001113 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001114 PAE is required for NX support, and furthermore enables
1115 larger swapspace support for non-overcommit purposes. It
1116 has the cost of more pagetable lookup overhead, and also
1117 consumes more pagetable space per process.
1118
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001119config ARCH_PHYS_ADDR_T_64BIT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001120 def_bool X86_64 || X86_PAE
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -07001121
Nick Piggin9e899812008-10-22 12:33:16 +02001122config DIRECT_GBPAGES
1123 bool "Enable 1GB pages for kernel pagetables" if EMBEDDED
1124 default y
1125 depends on X86_64
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001126 ---help---
Nick Piggin9e899812008-10-22 12:33:16 +02001127 Allow the kernel linear mapping to use 1GB pages on CPUs that
1128 support it. This can improve the kernel's performance a tiny bit by
1129 reducing TLB pressure. If in doubt, say "Y".
1130
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001131# Common NUMA Features
1132config NUMA
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001133 bool "Numa Memory Allocation and Scheduler Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001134 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +01001135 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Yinghai Lu0699eae2008-06-17 15:39:01 -07001136 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001137 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001138 Enable NUMA (Non Uniform Memory Access) support.
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001139
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001140 The kernel will try to allocate memory used by a CPU on the
1141 local memory controller of the CPU and add some more
1142 NUMA awareness to the kernel.
1143
Ingo Molnarc280ea52008-11-08 13:29:45 +01001144 For 64-bit this is recommended if the system is Intel Core i7
KOSAKI Motohirofd51b2d2008-11-05 02:27:19 +09001145 (or later), AMD Opteron, or EM64T NUMA.
1146
1147 For 32-bit this is only needed on (rare) 32-bit-only platforms
1148 that support NUMA topologies, such as NUMAQ / Summit, or if you
1149 boot a 32-bit kernel on a 64-bit NUMA platform.
1150
1151 Otherwise, you should say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001152
1153comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
1154 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
1155
1156config K8_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001157 def_bool y
1158 prompt "Old style AMD Opteron NUMA detection"
1159 depends on X86_64 && NUMA && PCI
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001160 ---help---
1161 Enable K8 NUMA node topology detection. You should say Y here if
1162 you have a multi processor AMD K8 system. This uses an old
1163 method to read the NUMA configuration directly from the builtin
1164 Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
1165 instead, which also takes priority if both are compiled in.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001166
1167config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001168 def_bool y
1169 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001170 depends on X86_64 && NUMA && ACPI && PCI
1171 select ACPI_NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001172 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001173 Enable ACPI SRAT based node topology detection.
1174
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001175# Some NUMA nodes have memory ranges that span
1176# other nodes. Even though a pfn is valid and
1177# between a node's start and end pfns, it may not
1178# reside on that node. See memmap_init_zone()
1179# for details.
1180config NODES_SPAN_OTHER_NODES
1181 def_bool y
1182 depends on X86_64_ACPI_NUMA
1183
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001184config NUMA_EMU
1185 bool "NUMA emulation"
1186 depends on X86_64 && NUMA
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001187 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001188 Enable NUMA emulation. A flat machine will be split
1189 into virtual nodes when booted with "numa=fake=N", where N is the
1190 number of nodes. This is only useful for debugging.
1191
1192config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001193 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
Jan Beulich46d50c92009-03-12 12:33:06 +00001194 range 1 9
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001195 default "9" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001196 default "6" if X86_64
1197 default "4" if X86_NUMAQ
1198 default "3"
1199 depends on NEED_MULTIPLE_NODES
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001200 ---help---
Mike Travis1184dc22008-05-12 21:21:12 +02001201 Specify the maximum number of NUMA Nodes available on the target
Matt LaPlante692105b2009-01-26 11:12:25 +01001202 system. Increases memory reserved to accommodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001203
Tejun Heoc1329372009-02-24 11:57:20 +09001204config HAVE_ARCH_BOOTMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001205 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001206 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001207
1208config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001209 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001210 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001211
1212config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001213 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001214 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001215
1216config HAVE_ARCH_ALLOC_REMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001217 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001218 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001219
1220config ARCH_FLATMEM_ENABLE
1221 def_bool y
Jeff Chua99809962008-08-06 19:09:53 +08001222 depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001223
1224config ARCH_DISCONTIGMEM_ENABLE
1225 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001226 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001227
1228config ARCH_DISCONTIGMEM_DEFAULT
1229 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001230 depends on NUMA && X86_32
1231
1232config ARCH_SPARSEMEM_DEFAULT
1233 def_bool y
1234 depends on X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001235
1236config ARCH_SPARSEMEM_ENABLE
1237 def_bool y
Yinghai Lu4272ebf2009-01-29 15:14:46 -08001238 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001239 select SPARSEMEM_STATIC if X86_32
1240 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1241
1242config ARCH_SELECT_MEMORY_MODEL
1243 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001244 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001245
1246config ARCH_MEMORY_PROBE
1247 def_bool X86_64
1248 depends on MEMORY_HOTPLUG
1249
1250source "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
1338 bool "MTRR (Memory Type Range Register) support"
1339 ---help---
1340 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1341 the Memory Type Range Registers (MTRRs) may be used to control
1342 processor access to memory ranges. This is most useful if you have
1343 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1344 allows bus write transfers to be combined into a larger transfer
1345 before bursting over the PCI/AGP bus. This can increase performance
1346 of image write operations 2.5 times or more. Saying Y here creates a
1347 /proc/mtrr file which may be used to manipulate your processor's
1348 MTRRs. Typically the X server should use this.
1349
1350 This code has a reasonably generic interface so that similar
1351 control registers on other processors can be easily supported
1352 as well:
1353
1354 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1355 Registers (ARRs) which provide a similar functionality to MTRRs. For
1356 these, the ARRs are used to emulate the MTRRs.
1357 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1358 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1359 write-combining. All of these processors are supported by this code
1360 and it makes sense to say Y here if you have one of them.
1361
1362 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1363 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1364 can lead to all sorts of problems, so it's good to say Y here.
1365
1366 You can safely say Y even if your machine doesn't have MTRRs, you'll
1367 just add about 9 KB to your kernel.
1368
Randy Dunlap7225e752008-07-26 17:54:22 -07001369 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001370
Yinghai Lu95ffa242008-04-29 03:52:33 -07001371config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001372 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001373 prompt "MTRR cleanup support"
1374 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001375 ---help---
Thomas Gleixneraba37282008-07-15 14:48:48 +02001376 Convert MTRR layout from continuous to discrete, so X drivers can
1377 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001378
Thomas Gleixneraba37282008-07-15 14:48:48 +02001379 Can be disabled with disable_mtrr_cleanup on the kernel command line.
Matt LaPlante692105b2009-01-26 11:12:25 +01001380 The largest mtrr entry size for a continuous block can be set with
Thomas Gleixneraba37282008-07-15 14:48:48 +02001381 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001382
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001383 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001384
1385config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001386 int "MTRR cleanup enable value (0-1)"
1387 range 0 1
1388 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001389 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001390 ---help---
Yinghai Luf5098d62008-04-29 20:25:58 -07001391 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001392
Yinghai Lu12031a62008-05-02 02:40:22 -07001393config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1394 int "MTRR cleanup spare reg num (0-7)"
1395 range 0 7
1396 default "1"
1397 depends on MTRR_SANITIZER
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001398 ---help---
Yinghai Lu12031a62008-05-02 02:40:22 -07001399 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001400 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001401
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001402config X86_PAT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001403 bool
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001404 prompt "x86 PAT support"
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001405 depends on MTRR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001406 ---help---
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001407 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001408
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001409 PATs are the modern equivalents of MTRRs and are much more
1410 flexible than MTRRs.
1411
1412 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001413 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001414
1415 If unsure, say Y.
1416
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001417config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001418 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001419 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001420 ---help---
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001421 This enables the kernel to use EFI runtime services that are
1422 available (such as the EFI variable services).
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001423
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001424 This option is only useful on systems that have EFI firmware.
1425 In addition, you should use the latest ELILO loader available
1426 at <http://elilo.sourceforge.net> in order to take advantage
1427 of EFI runtime services. However, even with this option, the
1428 resultant kernel should continue to boot on existing non-EFI
1429 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001430
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001431config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001432 def_bool y
1433 prompt "Enable seccomp to safely compute untrusted bytecode"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001434 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001435 This kernel feature is useful for number crunching applications
1436 that may need to compute untrusted bytecode during their
1437 execution. By using pipes or other transports made available to
1438 the process as file descriptors supporting the read/write
1439 syscalls, it's possible to isolate those applications in
1440 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001441 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001442 and the task is only allowed to execute a few safe syscalls
1443 defined by each seccomp mode.
1444
1445 If unsure, say Y. Only embedded should say N here.
1446
Ingo Molnar113c5412008-02-14 10:36:03 +01001447config CC_STACKPROTECTOR_ALL
1448 bool
1449
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001450config CC_STACKPROTECTOR
1451 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
Ingo Molnar113c5412008-02-14 10:36:03 +01001452 select CC_STACKPROTECTOR_ALL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001453 ---help---
1454 This option turns on the -fstack-protector GCC feature. This
Ingo Molnar113c5412008-02-14 10:36:03 +01001455 feature puts, at the beginning of functions, a canary value on
1456 the stack just before the return address, and validates
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001457 the value just before actually returning. Stack based buffer
1458 overflows (that need to overwrite this return address) now also
1459 overwrite the canary, which gets detected and the attack is then
1460 neutralized via a kernel panic.
1461
1462 This feature requires gcc version 4.2 or above, or a distribution
1463 gcc with the feature backported. Older versions are automatically
Ingo Molnar113c5412008-02-14 10:36:03 +01001464 detected and for those versions, this configuration option is
1465 ignored. (and a warning is printed during bootup)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001466
1467source kernel/Kconfig.hz
1468
1469config KEXEC
1470 bool "kexec system call"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001471 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001472 kexec is a system call that implements the ability to shutdown your
1473 current kernel, and to start another kernel. It is like a reboot
1474 but it is independent of the system firmware. And like a reboot
1475 you can start any kernel with it, not just Linux.
1476
1477 The name comes from the similarity to the exec system call.
1478
1479 It is an ongoing process to be certain the hardware in a machine
1480 is properly shutdown, so do not be surprised if this code does not
1481 initially work for you. It may help to enable device hotplugging
1482 support. As of this writing the exact hardware interface is
1483 strongly in flux, so no good recommendation can be made.
1484
1485config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001486 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001487 depends on X86_64 || (X86_32 && HIGHMEM)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001488 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001489 Generate crash dump after being started by kexec.
1490 This should be normally only set in special crash dump kernels
1491 which are loaded in the main kernel with kexec-tools into
1492 a specially reserved region and then later executed after
1493 a crash by kdump/kexec. The crash dump kernel must be compiled
1494 to a memory address not used by the main kernel or BIOS using
1495 PHYSICAL_START, or it must be built as a relocatable image
1496 (CONFIG_RELOCATABLE=y).
1497 For more details see Documentation/kdump/kdump.txt
1498
Huang Ying3ab83522008-07-25 19:45:07 -07001499config KEXEC_JUMP
1500 bool "kexec jump (EXPERIMENTAL)"
1501 depends on EXPERIMENTAL
Huang Yingfee7b0d2009-03-10 10:57:16 +08001502 depends on KEXEC && HIBERNATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001503 ---help---
Huang Ying89081d12008-07-25 19:45:10 -07001504 Jump between original kernel and kexeced kernel and invoke
1505 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001506
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001507config PHYSICAL_START
1508 hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001509 default "0x1000000"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001510 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001511 This gives the physical address where the kernel is loaded.
1512
1513 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1514 bzImage will decompress itself to above physical address and
1515 run from there. Otherwise, bzImage will run from the address where
1516 it has been loaded by the boot loader and will ignore above physical
1517 address.
1518
1519 In normal kdump cases one does not have to set/change this option
1520 as now bzImage can be compiled as a completely relocatable image
1521 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1522 address. This option is mainly useful for the folks who don't want
1523 to use a bzImage for capturing the crash dump and want to use a
1524 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1525 to be specifically compiled to run from a specific memory area
1526 (normally a reserved region) and this option comes handy.
1527
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001528 So if you are using bzImage for capturing the crash dump,
1529 leave the value here unchanged to 0x1000000 and set
1530 CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux
1531 for capturing the crash dump change this value to start of
1532 the reserved region. In other words, it can be set based on
1533 the "X" value as specified in the "crashkernel=YM@XM"
1534 command line boot parameter passed to the panic-ed
1535 kernel. Please take a look at Documentation/kdump/kdump.txt
1536 for more details about crash dumps.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001537
1538 Usage of bzImage for capturing the crash dump is recommended as
1539 one does not have to build two kernels. Same kernel can be used
1540 as production kernel and capture kernel. Above option should have
1541 gone away after relocatable bzImage support is introduced. But it
1542 is present because there are users out there who continue to use
1543 vmlinux for dump capture. This option should go away down the
1544 line.
1545
1546 Don't change this unless you know what you are doing.
1547
1548config RELOCATABLE
H. Peter Anvin26717802009-05-07 14:19:34 -07001549 bool "Build a relocatable kernel"
1550 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001551 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001552 This builds a kernel image that retains relocation information
1553 so it can be loaded someplace besides the default 1MB.
1554 The relocations tend to make the kernel binary about 10% larger,
1555 but are discarded at runtime.
1556
1557 One use is for the kexec on panic case where the recovery kernel
1558 must live at a different physical address than the primary
1559 kernel.
1560
1561 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1562 it has been loaded at and the compile time physical address
1563 (CONFIG_PHYSICAL_START) is ignored.
1564
H. Peter Anvin845adf72009-05-05 21:20:51 -07001565# Relocation on x86-32 needs some additional build support
1566config X86_NEED_RELOCS
1567 def_bool y
1568 depends on X86_32 && RELOCATABLE
1569
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001570config PHYSICAL_ALIGN
1571 hex
1572 prompt "Alignment value to which kernel should be aligned" if X86_32
H. Peter Anvinceefccc2009-05-11 16:12:16 -07001573 default "0x1000000"
1574 range 0x2000 0x1000000
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001575 ---help---
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001576 This value puts the alignment restrictions on physical address
1577 where kernel is loaded and run from. Kernel is compiled for an
1578 address which meets above alignment restriction.
1579
1580 If bootloader loads the kernel at a non-aligned address and
1581 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1582 address aligned to above value and run from there.
1583
1584 If bootloader loads the kernel at a non-aligned address and
1585 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1586 load address and decompress itself to the address it has been
1587 compiled for and run from there. The address for which kernel is
1588 compiled already meets above alignment restrictions. Hence the
1589 end result is that kernel runs from a physical address meeting
1590 above alignment restrictions.
1591
1592 Don't change this unless you know what you are doing.
1593
1594config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001595 bool "Support for hot-pluggable CPUs"
Ingo Molnar4b19ed912009-01-27 17:47:24 +01001596 depends on SMP && HOTPLUG
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001597 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001598 Say Y here to allow turning CPUs off and on. CPUs can be
1599 controlled through /sys/devices/system/cpu.
1600 ( Note: power management support will enable this option
1601 automatically on SMP systems. )
1602 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001603
1604config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001605 def_bool y
1606 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001607 depends on X86_32 || IA32_EMULATION
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001608 ---help---
Roland McGrathaf65d642008-01-30 13:30:43 +01001609 Map the 32-bit VDSO to the predictable old-style address too.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001610 ---help---
1611 Say N here if you are running a sufficiently recent glibc
1612 version (2.3.3 or later), to remove the high-mapped
1613 VDSO mapping and to exclusively use the randomized VDSO.
1614
1615 If unsure, say Y.
1616
Tim Bird516cbf32008-08-12 12:52:36 -07001617config CMDLINE_BOOL
1618 bool "Built-in kernel command line"
1619 default n
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001620 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001621 Allow for specifying boot arguments to the kernel at
1622 build time. On some systems (e.g. embedded ones), it is
1623 necessary or convenient to provide some or all of the
1624 kernel boot arguments with the kernel itself (that is,
1625 to not rely on the boot loader to provide them.)
1626
1627 To compile command line arguments into the kernel,
1628 set this option to 'Y', then fill in the
1629 the boot arguments in CONFIG_CMDLINE.
1630
1631 Systems with fully functional boot loaders (i.e. non-embedded)
1632 should leave this option set to 'N'.
1633
1634config CMDLINE
1635 string "Built-in kernel command string"
1636 depends on CMDLINE_BOOL
1637 default ""
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001638 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001639 Enter arguments here that should be compiled into the kernel
1640 image and used at boot time. If the boot loader provides a
1641 command line at boot time, it is appended to this string to
1642 form the full kernel command line, when the system boots.
1643
1644 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1645 change this behavior.
1646
1647 In most cases, the command line (whether built-in or provided
1648 by the boot loader) should specify the device for the root
1649 file system.
1650
1651config CMDLINE_OVERRIDE
1652 bool "Built-in command line overrides boot loader arguments"
1653 default n
1654 depends on CMDLINE_BOOL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001655 ---help---
Tim Bird516cbf32008-08-12 12:52:36 -07001656 Set this option to 'Y' to have the kernel ignore the boot loader
1657 command line, and use ONLY the built-in command line.
1658
1659 This is used to work around broken boot loaders. This should
1660 be set to 'N' under normal conditions.
1661
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001662endmenu
1663
1664config ARCH_ENABLE_MEMORY_HOTPLUG
1665 def_bool y
1666 depends on X86_64 || (X86_32 && HIGHMEM)
1667
Gary Hade35551052008-10-31 10:52:03 -07001668config ARCH_ENABLE_MEMORY_HOTREMOVE
1669 def_bool y
1670 depends on MEMORY_HOTPLUG
1671
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001672config HAVE_ARCH_EARLY_PFN_TO_NID
1673 def_bool X86_64
1674 depends on NUMA
1675
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001676menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001677
1678config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001679 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001680 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001681
1682source "kernel/power/Kconfig"
1683
1684source "drivers/acpi/Kconfig"
1685
Feng Tangefafc8b2009-08-14 15:23:29 -04001686source "drivers/sfi/Kconfig"
1687
Andi Kleena6b68072008-01-30 13:32:49 +01001688config X86_APM_BOOT
1689 bool
1690 default y
1691 depends on APM || APM_MODULE
1692
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001693menuconfig APM
1694 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001695 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001696 ---help---
1697 APM is a BIOS specification for saving power using several different
1698 techniques. This is mostly useful for battery powered laptops with
1699 APM compliant BIOSes. If you say Y here, the system time will be
1700 reset after a RESUME operation, the /proc/apm device will provide
1701 battery status information, and user-space programs will receive
1702 notification of APM "events" (e.g. battery status change).
1703
1704 If you select "Y" here, you can disable actual use of the APM
1705 BIOS by passing the "apm=off" option to the kernel at boot time.
1706
1707 Note that the APM support is almost completely disabled for
1708 machines with more than one CPU.
1709
1710 In order to use APM, you will need supporting software. For location
Randy Dunlap53471122008-03-12 18:10:51 -04001711 and more information, read <file:Documentation/power/pm.txt> and the
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001712 Battery Powered Linux mini-HOWTO, available from
1713 <http://www.tldp.org/docs.html#howto>.
1714
1715 This driver does not spin down disk drives (see the hdparm(8)
1716 manpage ("man 8 hdparm") for that), and it doesn't turn off
1717 VESA-compliant "green" monitors.
1718
1719 This driver does not support the TI 4000M TravelMate and the ACER
1720 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1721 desktop machines also don't have compliant BIOSes, and this driver
1722 may cause those machines to panic during the boot phase.
1723
1724 Generally, if you don't have a battery in your machine, there isn't
1725 much point in using this driver and you should say N. If you get
1726 random kernel OOPSes or reboots that don't seem to be related to
1727 anything, try disabling/enabling this option (or disabling/enabling
1728 APM in your BIOS).
1729
1730 Some other things you should try when experiencing seemingly random,
1731 "weird" problems:
1732
1733 1) make sure that you have enough swap space and that it is
1734 enabled.
1735 2) pass the "no-hlt" option to the kernel
1736 3) switch on floating point emulation in the kernel and pass
1737 the "no387" option to the kernel
1738 4) pass the "floppy=nodma" option to the kernel
1739 5) pass the "mem=4M" option to the kernel (thereby disabling
1740 all but the first 4 MB of RAM)
1741 6) make sure that the CPU is not over clocked.
1742 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1743 8) disable the cache from your BIOS settings
1744 9) install a fan for the video card or exchange video RAM
1745 10) install a better fan for the CPU
1746 11) exchange RAM chips
1747 12) exchange the motherboard.
1748
1749 To compile this driver as a module, choose M here: the
1750 module will be called apm.
1751
1752if APM
1753
1754config APM_IGNORE_USER_SUSPEND
1755 bool "Ignore USER SUSPEND"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001756 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001757 This option will ignore USER SUSPEND requests. On machines with a
1758 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1759 series notebooks, it is necessary to say Y because of a BIOS bug.
1760
1761config APM_DO_ENABLE
1762 bool "Enable PM at boot time"
1763 ---help---
1764 Enable APM features at boot time. From page 36 of the APM BIOS
1765 specification: "When disabled, the APM BIOS does not automatically
1766 power manage devices, enter the Standby State, enter the Suspend
1767 State, or take power saving steps in response to CPU Idle calls."
1768 This driver will make CPU Idle calls when Linux is idle (unless this
1769 feature is turned off -- see "Do CPU IDLE calls", below). This
1770 should always save battery power, but more complicated APM features
1771 will be dependent on your BIOS implementation. You may need to turn
1772 this option off if your computer hangs at boot time when using APM
1773 support, or if it beeps continuously instead of suspending. Turn
1774 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1775 T400CDT. This is off by default since most machines do fine without
1776 this feature.
1777
1778config APM_CPU_IDLE
1779 bool "Make CPU Idle calls when idle"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001780 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001781 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1782 On some machines, this can activate improved power savings, such as
1783 a slowed CPU clock rate, when the machine is idle. These idle calls
1784 are made after the idle loop has run for some length of time (e.g.,
1785 333 mS). On some machines, this will cause a hang at boot time or
1786 whenever the CPU becomes idle. (On machines with more than one CPU,
1787 this option does nothing.)
1788
1789config APM_DISPLAY_BLANK
1790 bool "Enable console blanking using APM"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001791 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001792 Enable console blanking using the APM. Some laptops can use this to
1793 turn off the LCD backlight when the screen blanker of the Linux
1794 virtual console blanks the screen. Note that this is only used by
1795 the virtual console screen blanker, and won't turn off the backlight
1796 when using the X Window system. This also doesn't have anything to
1797 do with your VESA-compliant power-saving monitor. Further, this
1798 option doesn't work for all laptops -- it might not turn off your
1799 backlight at all, or it might print a lot of errors to the console,
1800 especially if you are using gpm.
1801
1802config APM_ALLOW_INTS
1803 bool "Allow interrupts during APM BIOS calls"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001804 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001805 Normally we disable external interrupts while we are making calls to
1806 the APM BIOS as a measure to lessen the effects of a badly behaving
1807 BIOS implementation. The BIOS should reenable interrupts if it
1808 needs to. Unfortunately, some BIOSes do not -- especially those in
1809 many of the newer IBM Thinkpads. If you experience hangs when you
1810 suspend, try setting this to Y. Otherwise, say N.
1811
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001812endif # APM
1813
1814source "arch/x86/kernel/cpu/cpufreq/Kconfig"
1815
1816source "drivers/cpuidle/Kconfig"
1817
Andy Henroid27471fd2008-10-09 11:45:22 -07001818source "drivers/idle/Kconfig"
1819
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001820endmenu
1821
1822
1823menu "Bus options (PCI etc.)"
1824
1825config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001826 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001827 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001828 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001829 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001830 Find out whether you have a PCI motherboard. PCI is the name of a
1831 bus system, i.e. the way the CPU talks to the other stuff inside
1832 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1833 VESA. If you have PCI, say Y, otherwise N.
1834
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001835choice
1836 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001837 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001838 default PCI_GOANY
1839 ---help---
1840 On PCI systems, the BIOS can be used to detect the PCI devices and
1841 determine their configuration. However, some old PCI motherboards
1842 have BIOS bugs and may crash if this is done. Also, some embedded
1843 PCI-based systems don't have any BIOS at all. Linux can also try to
1844 detect the PCI hardware directly without using the BIOS.
1845
1846 With this option, you can specify how Linux should detect the
1847 PCI devices. If you choose "BIOS", the BIOS will be used,
1848 if you choose "Direct", the BIOS won't be used, and if you
1849 choose "MMConfig", then PCI Express MMCONFIG will be used.
1850 If you choose "Any", the kernel will try MMCONFIG, then the
1851 direct access method and falls back to the BIOS if that doesn't
1852 work. If unsure, go with the default, which is "Any".
1853
1854config PCI_GOBIOS
1855 bool "BIOS"
1856
1857config PCI_GOMMCONFIG
1858 bool "MMConfig"
1859
1860config PCI_GODIRECT
1861 bool "Direct"
1862
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001863config PCI_GOOLPC
1864 bool "OLPC"
1865 depends on OLPC
1866
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001867config PCI_GOANY
1868 bool "Any"
1869
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001870endchoice
1871
1872config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001873 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001874 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001875
1876# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1877config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001878 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001879 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001880
1881config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001882 def_bool y
Feng Tang5f0db7a2009-08-14 15:37:50 -04001883 depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001884
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001885config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001886 def_bool y
1887 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001888
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001889config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001890 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001891 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001892
1893config PCI_MMCONFIG
1894 bool "Support mmconfig PCI config space access"
1895 depends on X86_64 && PCI && ACPI
1896
1897config DMAR
1898 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
David Woodhouse4cf2e752009-02-11 17:23:43 +00001899 depends on PCI_MSI && ACPI && EXPERIMENTAL
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001900 help
1901 DMA remapping (DMAR) devices support enables independent address
1902 translations for Direct Memory Access (DMA) from devices.
1903 These DMA remapping devices are reported via ACPI tables
1904 and include PCI device scope covered by these DMA
1905 remapping devices.
1906
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001907config DMAR_DEFAULT_ON
Kyle McMartinf6be37f2009-02-26 12:57:56 -05001908 def_bool y
Kyle McMartin0cd5c3c2009-02-04 14:29:19 -08001909 prompt "Enable DMA Remapping Devices by default"
1910 depends on DMAR
1911 help
1912 Selecting this option will enable a DMAR device at boot time if
1913 one is found. If this option is not selected, DMAR support can
1914 be enabled by passing intel_iommu=on to the kernel. It is
1915 recommended you say N here while the DMAR code remains
1916 experimental.
1917
David Woodhouse62edf5d2009-07-04 10:59:46 +01001918config DMAR_BROKEN_GFX_WA
1919 def_bool n
1920 prompt "Workaround broken graphics drivers (going away soon)"
1921 depends on DMAR
1922 ---help---
1923 Current Graphics drivers tend to use physical address
1924 for DMA and avoid using DMA APIs. Setting this config
1925 option permits the IOMMU driver to set a unity map for
1926 all the OS-visible memory. Hence the driver can continue
1927 to use physical addresses for DMA, at least until this
1928 option is removed in the 2.6.32 kernel.
1929
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001930config DMAR_FLOPPY_WA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001931 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001932 depends on DMAR
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001933 ---help---
David Woodhousec7ab48d2009-06-26 19:10:36 +01001934 Floppy disk drivers are known to bypass DMA API calls
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001935 thereby failing to work when IOMMU is enabled. This
1936 workaround will setup a 1:1 mapping for the first
David Woodhousec7ab48d2009-06-26 19:10:36 +01001937 16MiB to make floppy (an ISA device) work.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001938
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001939config INTR_REMAP
1940 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
1941 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001942 ---help---
1943 Supports Interrupt remapping for IO-APIC and MSI devices.
1944 To use x2apic mode in the CPU's which support x2APIC enhancements or
1945 to support platforms with CPU's having > 8 bit APIC ID, say Y.
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001946
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001947source "drivers/pci/pcie/Kconfig"
1948
1949source "drivers/pci/Kconfig"
1950
1951# x86_64 have no ISA slots, but do have ISA-style DMA.
1952config ISA_DMA_API
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001953 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001954
1955if X86_32
1956
1957config ISA
1958 bool "ISA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001959 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001960 Find out whether you have ISA slots on your motherboard. ISA is the
1961 name of a bus system, i.e. the way the CPU talks to the other stuff
1962 inside your box. Other bus systems are PCI, EISA, MicroChannel
1963 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1964 newer boards don't support it. If you have ISA, say Y, otherwise N.
1965
1966config EISA
1967 bool "EISA support"
1968 depends on ISA
1969 ---help---
1970 The Extended Industry Standard Architecture (EISA) bus was
1971 developed as an open alternative to the IBM MicroChannel bus.
1972
1973 The EISA bus provided some of the features of the IBM MicroChannel
1974 bus while maintaining backward compatibility with cards made for
1975 the older ISA bus. The EISA bus saw limited use between 1988 and
1976 1995 when it was made obsolete by the PCI bus.
1977
1978 Say Y here if you are building a kernel for an EISA-based machine.
1979
1980 Otherwise, say N.
1981
1982source "drivers/eisa/Kconfig"
1983
1984config MCA
Ingo Molnar72ee6eb2009-01-27 16:57:49 +01001985 bool "MCA support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001986 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001987 MicroChannel Architecture is found in some IBM PS/2 machines and
1988 laptops. It is a bus system similar to PCI or ISA. See
1989 <file:Documentation/mca.txt> (and especially the web page given
1990 there) before attempting to build an MCA bus kernel.
1991
1992source "drivers/mca/Kconfig"
1993
1994config SCx200
1995 tristate "NatSemi SCx200 support"
Ingo Molnar8f9ca472009-02-05 16:21:53 +01001996 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001997 This provides basic support for National Semiconductor's
1998 (now AMD's) Geode processors. The driver probes for the
1999 PCI-IDs of several on-chip devices, so its a good dependency
2000 for other scx200_* drivers.
2001
2002 If compiled as a module, the driver is named scx200.
2003
2004config SCx200HR_TIMER
2005 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
2006 depends on SCx200 && GENERIC_TIME
2007 default y
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002008 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002009 This driver provides a clocksource built upon the on-chip
2010 27MHz high-resolution timer. Its also a workaround for
2011 NSC Geode SC-1100's buggy TSC, which loses time when the
2012 processor goes idle (as is done by the scheduler). The
2013 other workaround is idle=poll boot option.
2014
2015config GEODE_MFGPT_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002016 def_bool y
2017 prompt "Geode Multi-Function General Purpose Timer (MFGPT) events"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002018 depends on MGEODE_LX && GENERIC_TIME && GENERIC_CLOCKEVENTS
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002019 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002020 This driver provides a clock event source based on the MFGPT
2021 timer(s) in the CS5535 and CS5536 companion chip for the geode.
2022 MFGPTs have a better resolution and max interval than the
2023 generic PIT, and are suitable for use as high-res timers.
2024
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002025config OLPC
2026 bool "One Laptop Per Child support"
2027 default n
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002028 ---help---
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07002029 Add support for detecting the unique features of the OLPC
2030 XO hardware.
2031
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01002032endif # X86_32
2033
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002034config K8_NB
2035 def_bool y
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01002036 depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA)))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002037
2038source "drivers/pcmcia/Kconfig"
2039
2040source "drivers/pci/hotplug/Kconfig"
2041
2042endmenu
2043
2044
2045menu "Executable file formats / Emulations"
2046
2047source "fs/Kconfig.binfmt"
2048
2049config IA32_EMULATION
2050 bool "IA32 Emulation"
2051 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01002052 select COMPAT_BINFMT_ELF
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002053 ---help---
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002054 Include code to run 32-bit programs under a 64-bit kernel. You should
2055 likely turn this on, unless you're 100% sure that you don't have any
2056 32-bit programs left.
2057
2058config IA32_AOUT
Ingo Molnar8f9ca472009-02-05 16:21:53 +01002059 tristate "IA32 a.out support"
2060 depends on IA32_EMULATION
2061 ---help---
2062 Support old a.out binaries in the 32bit emulation.
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002063
2064config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002065 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002066 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002067
2068config COMPAT_FOR_U64_ALIGNMENT
2069 def_bool COMPAT
2070 depends on X86_64
2071
2072config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01002073 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04002074 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002075
2076endmenu
2077
2078
Keith Packarde5beae12008-11-03 18:21:45 +01002079config HAVE_ATOMIC_IOMAP
2080 def_bool y
2081 depends on X86_32
2082
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002083source "net/Kconfig"
2084
2085source "drivers/Kconfig"
2086
2087source "drivers/firmware/Kconfig"
2088
2089source "fs/Kconfig"
2090
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002091source "arch/x86/Kconfig.debug"
2092
2093source "security/Kconfig"
2094
2095source "crypto/Kconfig"
2096
Avi Kivityedf88412007-12-16 11:02:48 +02002097source "arch/x86/kvm/Kconfig"
2098
Sam Ravnborge279b6c2007-11-06 20:41:05 +01002099source "lib/Kconfig"