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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"
Sam Ravnborgdaa93fa2007-11-12 20:54:30 +01008 help
9 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
Ingo Molnara5574cf2008-05-05 23:19:50 +020022 select HAVE_UNSTABLE_SCHED_CLOCK
Sam Ravnborgec7748b2008-02-09 10:46:40 +010023 select HAVE_IDE
Mathieu Desnoyers42d4b832008-02-02 15:10:34 -050024 select HAVE_OPROFILE
Rik van Riel28b2ee22008-07-23 21:27:05 -070025 select HAVE_IOREMAP_PROT
Mathieu Desnoyers3f550092008-02-02 15:10:35 -050026 select HAVE_KPROBES
Ingo Molnar1f972762008-07-26 13:52:50 +020027 select ARCH_WANT_OPTIONAL_GPIOLIB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -080028 select HAVE_KRETPROBES
Steven Rostedte4b2b882008-08-14 15:45:11 -040029 select HAVE_FTRACE_MCOUNT_RECORD
Steven Rostedt677aa9f2008-05-17 00:01:36 -040030 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -040031 select HAVE_FUNCTION_TRACER
Randy Dunlap1a4e3f82008-02-20 09:20:08 -080032 select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)
Ingo Molnarfcbc04c2008-04-21 13:39:53 +020033 select HAVE_ARCH_KGDB if !X86_VOYAGER
Roland McGrath99bbc4b2008-04-20 14:35:12 -070034 select HAVE_ARCH_TRACEHOOK
Dmitry Baryshkov323ec002008-06-29 14:19:31 +040035 select HAVE_GENERIC_DMA_COHERENT if X86_32
Johannes Berg58340a02008-07-25 01:45:33 -070036 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Balbir Singh7d8330a2008-02-10 12:46:28 +053037
Sam Ravnborg73531902008-05-25 23:03:18 +020038config ARCH_DEFCONFIG
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020039 string
Sam Ravnborg73531902008-05-25 23:03:18 +020040 default "arch/x86/configs/i386_defconfig" if X86_32
41 default "arch/x86/configs/x86_64_defconfig" if X86_64
Sam Ravnborgb9b39bf2008-04-29 12:48:15 +020042
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010043config GENERIC_TIME
Harvey Harrison3c2362e2008-01-30 13:31:03 +010044 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010045
46config GENERIC_CMOS_UPDATE
Harvey Harrison3c2362e2008-01-30 13:31:03 +010047 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010048
49config CLOCKSOURCE_WATCHDOG
Harvey Harrison3c2362e2008-01-30 13:31:03 +010050 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010051
52config GENERIC_CLOCKEVENTS
Harvey Harrison3c2362e2008-01-30 13:31:03 +010053 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010054
55config GENERIC_CLOCKEVENTS_BROADCAST
Harvey Harrison3c2362e2008-01-30 13:31:03 +010056 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010057 depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
58
59config LOCKDEP_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010060 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010061
62config STACKTRACE_SUPPORT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010063 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010064
Heiko Carstensaa7d9352008-02-01 17:45:14 +010065config HAVE_LATENCYTOP_SUPPORT
66 def_bool y
67
Christoph Lameter1f842602008-01-07 23:20:30 -080068config FAST_CMPXCHG_LOCAL
69 bool
70 default y
71
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010072config MMU
Harvey Harrison3c2362e2008-01-30 13:31:03 +010073 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010074
75config ZONE_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +010076 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010077
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010078config SBUS
79 bool
80
81config GENERIC_ISA_DMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +010082 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010083
84config GENERIC_IOMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +010085 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010086
87config GENERIC_BUG
Harvey Harrison3c2362e2008-01-30 13:31:03 +010088 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010089 depends on BUG
90
91config GENERIC_HWEIGHT
Harvey Harrison3c2362e2008-01-30 13:31:03 +010092 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010093
Florian Fainellia6082952008-01-30 13:33:35 +010094config GENERIC_GPIO
Jan Beulich9ba16082008-10-15 22:01:38 -070095 bool
Florian Fainellia6082952008-01-30 13:33:35 +010096
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010097config ARCH_MAY_HAVE_PC_FDC
Harvey Harrison3c2362e2008-01-30 13:31:03 +010098 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +010099
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100100config RWSEM_GENERIC_SPINLOCK
101 def_bool !X86_XADD
102
103config RWSEM_XCHGADD_ALGORITHM
104 def_bool X86_XADD
105
Venki Pallipadia6869cc2008-02-08 17:05:44 -0800106config ARCH_HAS_CPU_IDLE_WAIT
107 def_bool y
108
Sam Ravnborg1032c0b2007-11-06 21:35:08 +0100109config GENERIC_CALIBRATE_DELAY
110 def_bool y
111
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100112config GENERIC_TIME_VSYSCALL
113 bool
114 default X86_64
115
venkatesh.pallipadi@intel.com9a0b8412008-01-31 17:35:06 -0800116config ARCH_HAS_CPU_RELAX
117 def_bool y
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100118
Venkatesh Pallipadi89cedfe2008-10-16 19:00:08 -0400119config ARCH_HAS_DEFAULT_IDLE
120 def_bool y
121
Pekka Enberg1b27d052008-04-28 02:12:22 -0700122config ARCH_HAS_CACHE_LINE_SIZE
123 def_bool y
124
Mike Travisdd5af902008-01-30 13:33:32 +0100125config HAVE_SETUP_PER_CPU_AREA
Mike Travis23ca4bb2008-05-12 21:21:12 +0200126 def_bool X86_64_SMP || (X86_SMP && !X86_VOYAGER)
travis@sgi.comb32ef632008-01-30 13:32:51 +0100127
Mike Travis9f0e8d02008-04-04 18:11:01 -0700128config HAVE_CPUMASK_OF_CPU_MAP
129 def_bool X86_64_SMP
130
Johannes Berg801e4062007-12-08 02:12:39 +0100131config ARCH_HIBERNATION_POSSIBLE
132 def_bool y
133 depends on !SMP || !X86_VOYAGER
134
Johannes Bergf4cb5702007-12-08 02:14:00 +0100135config ARCH_SUSPEND_POSSIBLE
136 def_bool y
137 depends on !X86_VOYAGER
138
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100139config ZONE_DMA32
140 bool
141 default X86_64
142
143config ARCH_POPULATES_NODE_MAP
144 def_bool y
145
146config AUDIT_ARCH
147 bool
148 default X86_64
149
Ingo Molnar765c68b2008-04-09 11:03:37 +0200150config ARCH_SUPPORTS_OPTIMIZED_INLINING
151 def_bool y
152
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100153# Use the generic interrupt handling code in kernel/irq/:
154config GENERIC_HARDIRQS
155 bool
156 default y
157
158config GENERIC_IRQ_PROBE
159 bool
160 default y
161
162config GENERIC_PENDING_IRQ
163 bool
164 depends on GENERIC_HARDIRQS && SMP
165 default y
166
167config X86_SMP
168 bool
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100169 depends on SMP && ((X86_32 && !X86_VOYAGER) || X86_64)
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100170 default y
171
James Bottomley6cd10f82008-11-09 11:53:14 -0600172config USE_GENERIC_SMP_HELPERS
173 def_bool y
174 depends on SMP
175
Sam Ravnborg6b0c3d42008-01-30 13:32:27 +0100176config X86_32_SMP
177 def_bool y
178 depends on X86_32 && SMP
179
180config X86_64_SMP
181 def_bool y
182 depends on X86_64 && SMP
183
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100184config X86_HT
185 bool
Adrian Bunkee0011a2007-12-04 17:19:07 +0100186 depends on SMP
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200187 depends on (X86_32 && !X86_VOYAGER) || X86_64
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100188 default y
189
190config X86_BIOS_REBOOT
191 bool
Ingo Molnar31ac4092008-07-10 13:31:04 +0200192 depends on !X86_VOYAGER
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100193 default y
194
195config X86_TRAMPOLINE
196 bool
Pavel Macheke44b7b72008-04-10 23:28:10 +0200197 depends on X86_SMP || (X86_VOYAGER && SMP) || (64BIT && ACPI_SLEEP)
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100198 default y
199
200config KTIME_SCALAR
201 def_bool X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100202source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700203source "kernel/Kconfig.freezer"
Sam Ravnborg8d5fffb2007-11-06 23:30:30 +0100204
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100205menu "Processor type and features"
206
207source "kernel/time/Kconfig"
208
209config SMP
210 bool "Symmetric multi-processing support"
211 ---help---
212 This enables support for systems with more than one CPU. If you have
213 a system with only one CPU, like most personal computers, say N. If
214 you have a system with more than one CPU, say Y.
215
216 If you say N here, the kernel will run on single and multiprocessor
217 machines, but will use only one CPU of a multiprocessor machine. If
218 you say Y here, the kernel will run on many, but not all,
219 singleprocessor machines. On a singleprocessor machine, the kernel
220 will run faster if you say N here.
221
222 Note that if you say Y here and choose architecture "586" or
223 "Pentium" under "Processor family", the kernel will not work on 486
224 architectures. Similarly, multiprocessor kernels for the "PPro"
225 architecture may not work on all Pentium based boards.
226
227 People using multiprocessor machines who say Y here should also say
228 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
229 Management" code will be disabled if you say Y here.
230
Adrian Bunk03502fa2008-02-03 15:50:21 +0200231 See also <file:Documentation/i386/IO-APIC.txt>,
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100232 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
233 <http://www.tldp.org/docs.html#howto>.
234
235 If you don't know what to do here, say N.
236
James Bottomleyb3572e32008-10-30 16:00:59 -0500237config X86_HAS_BOOT_CPU_ID
238 def_bool y
239 depends on X86_VOYAGER
240
Yinghai Lu6695c852008-06-19 12:13:09 -0700241config X86_FIND_SMP_CONFIG
242 def_bool y
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200243 depends on X86_MPPARSE || X86_VOYAGER
Yinghai Lu6695c852008-06-19 12:13:09 -0700244
245if ACPI
246config X86_MPPARSE
247 def_bool y
248 bool "Enable MPS table"
Ingo Molnar5ab74722008-07-10 14:42:03 +0200249 depends on X86_LOCAL_APIC
Yinghai Lu6695c852008-06-19 12:13:09 -0700250 help
251 For old smp systems that do not have proper acpi support. Newer systems
252 (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
253endif
254
255if !ACPI
256config X86_MPPARSE
257 def_bool y
Ingo Molnar5ab74722008-07-10 14:42:03 +0200258 depends on X86_LOCAL_APIC
Yinghai Lu6695c852008-06-19 12:13:09 -0700259endif
260
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100261choice
262 prompt "Subarchitecture Type"
263 default X86_PC
264
265config X86_PC
266 bool "PC-compatible"
267 help
268 Choose this option if your computer is a standard PC or compatible.
269
270config X86_ELAN
271 bool "AMD Elan"
272 depends on X86_32
273 help
274 Select this for an AMD Elan processor.
275
276 Do not use this option for K6/Athlon/Opteron processors!
277
278 If unsure, choose "PC-compatible" instead.
279
280config X86_VOYAGER
281 bool "Voyager (NCR)"
Ingo Molnar1ac97012008-05-19 14:10:14 +0200282 depends on X86_32 && (SMP || BROKEN) && !PCI
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100283 help
284 Voyager is an MCA-based 32-way capable SMP architecture proprietary
285 to NCR Corp. Machine classes 345x/35xx/4100/51xx are Voyager-based.
286
287 *** WARNING ***
288
289 If you do not specifically know you have a Voyager based machine,
290 say N here, otherwise the kernel you build will not be bootable.
291
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100292config X86_GENERICARCH
Yinghai Lud49c4282008-06-08 18:31:54 -0700293 bool "Generic architecture"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100294 depends on X86_32
295 help
Yinghai Lud49c4282008-06-08 18:31:54 -0700296 This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
297 subarchitectures. It is intended for a generic binary kernel.
298 if you select them all, kernel will probe it one by one. and will
299 fallback to default.
300
301if X86_GENERICARCH
302
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100303config X86_NUMAQ
304 bool "NUMAQ (IBM/Sequent)"
Ingo Molnar3de352b2008-07-08 11:14:58 +0200305 depends on SMP && X86_32 && PCI && X86_MPPARSE
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100306 select NUMA
307 help
Yinghai Lud49c4282008-06-08 18:31:54 -0700308 This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
309 NUMA multiquad box. This changes the way that processors are
310 bootstrapped, and uses Clustered Logical APIC addressing mode instead
311 of Flat Logical. You will need a new lynxer.elf file to flash your
312 firmware with - send email to <Martin.Bligh@us.ibm.com>.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100313
314config X86_SUMMIT
315 bool "Summit/EXA (IBM x440)"
316 depends on X86_32 && SMP
317 help
318 This option is needed for IBM systems that use the Summit/EXA chipset.
319 In particular, it is needed for the x440.
320
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100321config X86_ES7000
322 bool "Support for Unisys ES7000 IA32 series"
323 depends on X86_32 && SMP
324 help
325 Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
326 supposed to run on an IA32-based Unisys ES7000 system.
Yinghai Lud49c4282008-06-08 18:31:54 -0700327
328config X86_BIGSMP
329 bool "Support for big SMP systems with more than 8 CPUs"
330 depends on X86_32 && SMP
331 help
332 This option is needed for the systems that have more than 8 CPUs
333 and if the system is not of any sub-arch type above.
334
335endif
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100336
337config X86_VSMP
338 bool "Support for ScaleMP vSMP"
Glauber Costa96597fd2008-02-11 17:16:04 -0200339 select PARAVIRT
Ingo Molnara6784ad2008-07-10 12:21:58 +0200340 depends on X86_64 && PCI
Glauber Costa96597fd2008-02-11 17:16:04 -0200341 help
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100342 Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
343 supposed to run on these EM64T-based machines. Only choose this option
344 if you have one of these machines.
345
346endchoice
347
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200348config X86_VISWS
349 bool "SGI 320/540 (Visual Workstation)"
Ingo Molnar39415a42008-07-10 20:06:30 +0200350 depends on X86_32 && PCI && !X86_VOYAGER && X86_MPPARSE && PCI_GODIRECT
Ingo Molnar1b84e1c2008-07-10 15:55:27 +0200351 help
352 The SGI Visual Workstation series is an IA32-based workstation
353 based on SGI systems chips with some legacy PC hardware attached.
354
355 Say Y here to create a kernel to run on the SGI 320 or 540.
356
357 A kernel compiled for the Visual Workstation will run on general
358 PCs as well. See <file:Documentation/sgi-visws.txt> for details.
359
Ingo Molnar1f972762008-07-26 13:52:50 +0200360config X86_RDC321X
361 bool "RDC R-321x SoC"
362 depends on X86_32
363 select M486
364 select X86_REBOOTFIXUPS
365 help
366 This option is needed for RDC R-321x system-on-chip, also known
367 as R-8610-(G).
368 If you don't have one of these chips, you should say N here.
369
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100370config SCHED_NO_NO_OMIT_FRAME_POINTER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100371 def_bool y
372 prompt "Single-depth WCHAN output"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100373 depends on X86_32
374 help
375 Calculate simpler /proc/<PID>/wchan values. If this option
376 is disabled then wchan values will recurse back to the
377 caller function. This provides more accurate wchan values,
378 at the expense of slightly more scheduling overhead.
379
380 If in doubt, say "Y".
381
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100382menuconfig PARAVIRT_GUEST
383 bool "Paravirtualized guest support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100384 help
385 Say Y here to get to see options related to running Linux under
386 various hypervisors. This option alone does not add any kernel code.
387
388 If you say N, all options in this submenu will be skipped and disabled.
389
390if PARAVIRT_GUEST
391
392source "arch/x86/xen/Kconfig"
393
394config VMI
395 bool "VMI Guest support"
396 select PARAVIRT
Eduardo Pereira Habkost42d545c2008-01-30 13:33:32 +0100397 depends on X86_32
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200398 depends on !X86_VOYAGER
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100399 help
400 VMI provides a paravirtualized interface to the VMware ESX server
401 (it could be used by other hypervisors in theory too, but is not
402 at the moment), by linking the kernel to a GPL-ed ROM module
403 provided by the hypervisor.
404
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200405config KVM_CLOCK
406 bool "KVM paravirtualized clock"
407 select PARAVIRT
Gerd Hoffmannf6e16d52008-06-03 16:17:32 +0200408 select PARAVIRT_CLOCK
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200409 depends on !X86_VOYAGER
Glauber de Oliveira Costa790c73f2008-02-15 17:52:48 -0200410 help
411 Turning on this option will allow you to run a paravirtualized clock
412 when running over the KVM hypervisor. Instead of relying on a PIT
413 (or probably other) emulation by the underlying device model, the host
414 provides the guest with timing infrastructure such as time of day, and
415 system time
416
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500417config KVM_GUEST
418 bool "KVM Guest support"
419 select PARAVIRT
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200420 depends on !X86_VOYAGER
Marcelo Tosatti0cf1bfd2008-02-22 12:21:36 -0500421 help
422 This option enables various optimizations for running under the KVM
423 hypervisor.
424
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100425source "arch/x86/lguest/Kconfig"
426
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100427config PARAVIRT
428 bool "Enable paravirtualization code"
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200429 depends on !X86_VOYAGER
Eduardo Pereira Habkoste61bd942008-01-30 13:33:32 +0100430 help
431 This changes the kernel so it can modify itself when it is run
432 under a hypervisor, potentially improving performance significantly
433 over full virtualization. However, when run without a hypervisor
434 the kernel is theoretically slower and slightly larger.
435
Gerd Hoffmann7af192c2008-06-03 16:17:29 +0200436config PARAVIRT_CLOCK
437 bool
438 default n
439
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100440endif
441
Jeremy Fitzhardinge97349132008-06-25 00:19:14 -0400442config PARAVIRT_DEBUG
443 bool "paravirt-ops debugging"
444 depends on PARAVIRT && DEBUG_KERNEL
445 help
446 Enable to debug paravirt_ops internals. Specifically, BUG if
447 a paravirt_op is missing when it is called.
448
Yinghai Lu03273182008-04-18 17:49:15 -0700449config MEMTEST
450 bool "Memtest"
Yinghai Luc64df702008-03-21 18:56:19 -0700451 help
452 This option adds a kernel parameter 'memtest', which allows memtest
Yinghai Lu03273182008-04-18 17:49:15 -0700453 to be set.
454 memtest=0, mean disabled; -- default
455 memtest=1, mean do 1 test pattern;
456 ...
457 memtest=4, mean do 4 test patterns.
Thomas Gleixneraba37282008-07-15 14:48:48 +0200458 If you are unsure how to answer this question, answer N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100459
460config X86_SUMMIT_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100461 def_bool y
Yinghai Lu0699eae2008-06-17 15:39:01 -0700462 depends on X86_32 && NUMA && X86_GENERICARCH
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100463
464config X86_CYCLONE_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100465 def_bool y
Yinghai Lu0699eae2008-06-17 15:39:01 -0700466 depends on X86_GENERICARCH
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100467
468config ES7000_CLUSTERED_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100469 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100470 depends on SMP && X86_ES7000 && MPENTIUMIII
471
472source "arch/x86/Kconfig.cpu"
473
474config HPET_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100475 def_bool X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100476 prompt "HPET Timer Support" if X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100477 help
478 Use the IA-PC HPET (High Precision Event Timer) to manage
479 time in preference to the PIT and RTC, if a HPET is
480 present.
481 HPET is the next generation timer replacing legacy 8254s.
482 The HPET provides a stable time base on SMP
483 systems, unlike the TSC, but it is more expensive to access,
484 as it is off-chip. You can find the HPET spec at
485 <http://www.intel.com/hardwaredesign/hpetspec.htm>.
486
487 You can safely choose Y here. However, HPET will only be
488 activated if the platform and the BIOS support this feature.
489 Otherwise the 8254 will be used for timing services.
490
491 Choose N to continue using the legacy 8254 timer.
492
493config HPET_EMULATE_RTC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100494 def_bool y
Bernhard Walle9d8af782008-02-06 01:38:52 -0800495 depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100496
497# Mark as embedded because too many people got it wrong.
498# The code disables itself when not needed.
Thomas Petazzoni7ae93922008-04-28 02:14:14 -0700499config DMI
500 default y
501 bool "Enable DMI scanning" if EMBEDDED
502 help
503 Enabled scanning of DMI to identify machine quirks. Say Y
504 here unless you have verified that your setup is not
505 affected by entries in the DMI blacklist. Required by PNP
506 BIOS code.
507
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100508config GART_IOMMU
509 bool "GART IOMMU support" if EMBEDDED
510 default y
511 select SWIOTLB
512 select AGP
513 depends on X86_64 && PCI
514 help
515 Support for full DMA access of devices with 32bit memory access only
516 on systems with more than 3GB. This is usually needed for USB,
517 sound, many IDE/SATA chipsets and some other devices.
518 Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
519 based hardware IOMMU and a software bounce buffer based IOMMU used
520 on Intel systems and as fallback.
521 The code is only active when needed (enough memory and limited
522 device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
523 too.
524
525config CALGARY_IOMMU
526 bool "IBM Calgary IOMMU support"
527 select SWIOTLB
528 depends on X86_64 && PCI && EXPERIMENTAL
529 help
530 Support for hardware IOMMUs in IBM's xSeries x366 and x460
531 systems. Needed to run systems with more than 3GB of memory
532 properly with 32-bit PCI devices that do not support DAC
533 (Double Address Cycle). Calgary also supports bus level
534 isolation, where all DMAs pass through the IOMMU. This
535 prevents them from going anywhere except their intended
536 destination. This catches hard-to-find kernel bugs and
537 mis-behaving drivers and devices that do not use the DMA-API
538 properly to set up their DMA buffers. The IOMMU can be
539 turned off at boot time with the iommu=off parameter.
540 Normally the kernel will make the right choice by itself.
541 If unsure, say Y.
542
543config CALGARY_IOMMU_ENABLED_BY_DEFAULT
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100544 def_bool y
545 prompt "Should Calgary be enabled by default?"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100546 depends on CALGARY_IOMMU
547 help
548 Should Calgary be enabled by default? if you choose 'y', Calgary
549 will be used (if it exists). If you choose 'n', Calgary will not be
550 used even if it exists. If you choose 'n' and would like to use
551 Calgary anyway, pass 'iommu=calgary' on the kernel command line.
552 If unsure, say Y.
553
Joerg Roedel2b188722008-06-26 21:27:37 +0200554config AMD_IOMMU
555 bool "AMD IOMMU support"
Ingo Molnar07c40e82008-06-27 11:31:28 +0200556 select SWIOTLB
Joerg Roedela80dc3e2008-09-11 16:51:41 +0200557 select PCI_MSI
Ingo Molnar24d2ba02008-06-27 10:37:03 +0200558 depends on X86_64 && PCI && ACPI
Joerg Roedel2b188722008-06-26 21:27:37 +0200559 help
Joerg Roedel18d22202008-07-03 19:35:06 +0200560 With this option you can enable support for AMD IOMMU hardware in
561 your system. An IOMMU is a hardware component which provides
562 remapping of DMA memory accesses from devices. With an AMD IOMMU you
563 can isolate the the DMA memory of different devices and protect the
564 system from misbehaving device drivers or hardware.
565
566 You can find out if your system has an AMD IOMMU if you look into
567 your BIOS for an option to enable it or if you have an IVRS ACPI
568 table.
Joerg Roedel2b188722008-06-26 21:27:37 +0200569
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100570# need this always selected by IOMMU for the VIA workaround
571config SWIOTLB
572 bool
573 help
574 Support for software bounce buffers used on x86-64 systems
575 which don't have a hardware IOMMU (e.g. the current generation
576 of Intel's x86-64 CPUs). Using this PCI devices which can only
577 access 32-bits of memory can be used on systems with more than
578 3 GB of memory. If unsure, say Y.
579
FUJITA Tomonoria8522502008-04-29 00:59:36 -0700580config IOMMU_HELPER
FUJITA Tomonori18b743d2008-07-10 09:50:50 +0900581 def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700582
Mike Travis1184dc22008-05-12 21:21:12 +0200583config MAXSMP
584 bool "Configure Maximum number of SMP Processors and NUMA Nodes"
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700585 depends on X86_64 && SMP && BROKEN
Mike Travis1184dc22008-05-12 21:21:12 +0200586 default n
587 help
588 Configure maximum number of CPUS and NUMA Nodes for this architecture.
589 If unsure, say N.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100590
591config NR_CPUS
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700592 int "Maximum number of CPUs (2-512)" if !MAXSMP
593 range 2 512
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100594 depends on SMP
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700595 default "4096" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100596 default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
597 default "8"
598 help
599 This allows you to specify the maximum number of CPUs which this
Linus Torvaldsd25e26b2008-08-25 14:15:38 -0700600 kernel will support. The maximum supported value is 512 and the
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100601 minimum value which makes sense is 2.
602
603 This is purely to save memory - each supported CPU adds
604 approximately eight kilobytes to the kernel image.
605
606config SCHED_SMT
607 bool "SMT (Hyperthreading) scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800608 depends on X86_HT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100609 help
610 SMT scheduler support improves the CPU scheduler's decision making
611 when dealing with Intel Pentium 4 chips with HyperThreading at a
612 cost of slightly increased overhead in some places. If unsure say
613 N here.
614
615config SCHED_MC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100616 def_bool y
617 prompt "Multi-core scheduler support"
Hiroshi Shimamotob089c122008-02-27 13:16:30 -0800618 depends on X86_HT
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100619 help
620 Multi-core scheduler support improves the CPU scheduler's decision
621 making when dealing with multi-core CPU chips at a cost of slightly
622 increased overhead in some places. If unsure say N here.
623
624source "kernel/Kconfig.preempt"
625
626config X86_UP_APIC
627 bool "Local APIC support on uniprocessors"
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200628 depends on X86_32 && !SMP && !(X86_VOYAGER || X86_GENERICARCH)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100629 help
630 A local APIC (Advanced Programmable Interrupt Controller) is an
631 integrated interrupt controller in the CPU. If you have a single-CPU
632 system which has a processor with a local APIC, you can say Y here to
633 enable and use it. If you say Y here even though your machine doesn't
634 have a local APIC, then the kernel will still run with no slowdown at
635 all. The local APIC supports CPU-generated self-interrupts (timer,
636 performance counters), and the NMI watchdog which detects hard
637 lockups.
638
639config X86_UP_IOAPIC
640 bool "IO-APIC support on uniprocessors"
641 depends on X86_UP_APIC
642 help
643 An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
644 SMP-capable replacement for PC-style interrupt controllers. Most
645 SMP systems and many recent uniprocessor systems have one.
646
647 If you have a single-CPU system with an IO-APIC, you can say Y here
648 to use it. If you say Y here even though your machine doesn't have
649 an IO-APIC, then the kernel will still run with no slowdown at all.
650
651config X86_LOCAL_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100652 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200653 depends on X86_64 || (X86_32 && (X86_UP_APIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100654
655config X86_IO_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100656 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200657 depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100658
659config X86_VISWS_APIC
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100660 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100661 depends on X86_32 && X86_VISWS
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100662
663config X86_MCE
664 bool "Machine Check Exception"
665 depends on !X86_VOYAGER
666 ---help---
667 Machine Check Exception support allows the processor to notify the
668 kernel if it detects a problem (e.g. overheating, component failure).
669 The action the kernel takes depends on the severity of the problem,
670 ranging from a warning message on the console, to halting the machine.
671 Your processor must be a Pentium or newer to support this - check the
672 flags in /proc/cpuinfo for mce. Note that some older Pentium systems
673 have a design flaw which leads to false MCE events - hence MCE is
674 disabled on all P5 processors, unless explicitly enabled with "mce"
675 as a boot argument. Similarly, if MCE is built in and creates a
676 problem on some new non-standard machine, you can boot with "nomce"
677 to disable it. MCE support simply ignores non-MCE processors like
678 the 386 and 486, so nearly everyone can say Y here.
679
680config X86_MCE_INTEL
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100681 def_bool y
682 prompt "Intel MCE features"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100683 depends on X86_64 && X86_MCE && X86_LOCAL_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100684 help
685 Additional support for intel specific MCE features such as
686 the thermal monitor.
687
688config X86_MCE_AMD
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100689 def_bool y
690 prompt "AMD MCE features"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100691 depends on X86_64 && X86_MCE && X86_LOCAL_APIC
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100692 help
693 Additional support for AMD specific MCE features such as
694 the DRAM Error Threshold.
695
696config X86_MCE_NONFATAL
697 tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
698 depends on X86_32 && X86_MCE
699 help
700 Enabling this feature starts a timer that triggers every 5 seconds which
701 will look at the machine check registers to see if anything happened.
702 Non-fatal problems automatically get corrected (but still logged).
703 Disable this if you don't want to see these messages.
704 Seeing the messages this option prints out may be indicative of dying
705 or out-of-spec (ie, overclocked) hardware.
706 This option only does something on certain CPUs.
707 (AMD Athlon/Duron and Intel Pentium 4)
708
709config X86_MCE_P4THERMAL
710 bool "check for P4 thermal throttling interrupt."
Ingo Molnarefefa6f2008-07-10 16:09:50 +0200711 depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100712 help
713 Enabling this feature will cause a message to be printed when the P4
714 enters thermal throttling.
715
716config VM86
717 bool "Enable VM86 support" if EMBEDDED
718 default y
719 depends on X86_32
720 help
721 This option is required by programs like DOSEMU to run 16-bit legacy
722 code on X86 processors. It also may be needed by software like
723 XFree86 to initialize some video cards via BIOS. Disabling this
724 option saves about 6k.
725
726config TOSHIBA
727 tristate "Toshiba Laptop support"
728 depends on X86_32
729 ---help---
730 This adds a driver to safely access the System Management Mode of
731 the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
732 not work on models with a Phoenix BIOS. The System Management Mode
733 is used to set the BIOS and power saving options on Toshiba portables.
734
735 For information on utilities to make use of this driver see the
736 Toshiba Linux utilities web site at:
737 <http://www.buzzard.org.uk/toshiba/>.
738
739 Say Y if you intend to run this kernel on a Toshiba portable.
740 Say N otherwise.
741
742config I8K
743 tristate "Dell laptop support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100744 ---help---
745 This adds a driver to safely access the System Management Mode
746 of the CPU on the Dell Inspiron 8000. The System Management Mode
747 is used to read cpu temperature and cooling fan status and to
748 control the fans on the I8K portables.
749
750 This driver has been tested only on the Inspiron 8000 but it may
751 also work with other Dell laptops. You can force loading on other
752 models by passing the parameter `force=1' to the module. Use at
753 your own risk.
754
755 For information on utilities to make use of this driver see the
756 I8K Linux utilities web site at:
757 <http://people.debian.org/~dz/i8k/>
758
759 Say Y if you intend to run this kernel on a Dell Inspiron 8000.
760 Say N otherwise.
761
762config X86_REBOOTFIXUPS
Jan Beulich9ba16082008-10-15 22:01:38 -0700763 bool "Enable X86 board specific fixups for reboot"
764 depends on X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100765 ---help---
766 This enables chipset and/or board specific fixups to be done
767 in order to get reboot to work correctly. This is only needed on
768 some combinations of hardware and BIOS. The symptom, for which
769 this config is intended, is when reboot ends with a stalled/hung
770 system.
771
772 Currently, the only fixup is for the Geode machines using
Florian Fainelli5e3a77e2008-01-30 13:33:36 +0100773 CS5530A and CS5536 chipsets and the RDC R-321x SoC.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100774
775 Say Y if you want to enable the fixup. Currently, it's safe to
776 enable this option even if you don't need it.
777 Say N otherwise.
778
779config MICROCODE
Peter Oruba8d86f392008-07-28 18:44:21 +0200780 tristate "/dev/cpu/microcode - microcode support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100781 select FW_LOADER
782 ---help---
783 If you say Y here, you will be able to update the microcode on
Peter Oruba80cc9f12008-07-28 18:44:22 +0200784 certain Intel and AMD processors. The Intel support is for the
785 IA32 family, e.g. Pentium Pro, Pentium II, Pentium III,
786 Pentium 4, Xeon etc. The AMD support is for family 0x10 and
787 0x11 processors, e.g. Opteron, Phenom and Turion 64 Ultra.
788 You will obviously need the actual microcode binary data itself
789 which is not shipped with the Linux kernel.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100790
Peter Oruba8d86f392008-07-28 18:44:21 +0200791 This option selects the general module only, you need to select
792 at least one vendor specific module as well.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100793
794 To compile this driver as a module, choose M here: the
795 module will be called microcode.
796
Peter Oruba8d86f392008-07-28 18:44:21 +0200797config MICROCODE_INTEL
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200798 bool "Intel microcode patch loading support"
Peter Oruba8d86f392008-07-28 18:44:21 +0200799 depends on MICROCODE
800 default MICROCODE
801 select FW_LOADER
802 --help---
803 This options enables microcode patch loading support for Intel
804 processors.
805
806 For latest news and information on obtaining all the required
807 Intel ingredients for this driver, check:
808 <http://www.urbanmyth.org/microcode/>.
809
Peter Oruba80cc9f12008-07-28 18:44:22 +0200810config MICROCODE_AMD
Dmitry Adamushko18dbc912008-09-23 12:08:44 +0200811 bool "AMD microcode patch loading support"
Peter Oruba80cc9f12008-07-28 18:44:22 +0200812 depends on MICROCODE
813 select FW_LOADER
814 --help---
815 If you select this option, microcode patch loading support for AMD
816 processors will be enabled.
817
Peter Oruba8d86f392008-07-28 18:44:21 +0200818 config MICROCODE_OLD_INTERFACE
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100819 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100820 depends on MICROCODE
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100821
822config X86_MSR
823 tristate "/dev/cpu/*/msr - Model-specific register support"
824 help
825 This device gives privileged processes access to the x86
826 Model-Specific Registers (MSRs). It is a character device with
827 major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
828 MSR accesses are directed to a specific CPU on multi-processor
829 systems.
830
831config X86_CPUID
832 tristate "/dev/cpu/*/cpuid - CPU information support"
833 help
834 This device gives processes access to the x86 CPUID instruction to
835 be executed on a specific processor. It is a character device
836 with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
837 /dev/cpu/31/cpuid.
838
839choice
840 prompt "High Memory Support"
841 default HIGHMEM4G if !X86_NUMAQ
842 default HIGHMEM64G if X86_NUMAQ
843 depends on X86_32
844
845config NOHIGHMEM
846 bool "off"
847 depends on !X86_NUMAQ
848 ---help---
849 Linux can use up to 64 Gigabytes of physical memory on x86 systems.
850 However, the address space of 32-bit x86 processors is only 4
851 Gigabytes large. That means that, if you have a large amount of
852 physical memory, not all of it can be "permanently mapped" by the
853 kernel. The physical memory that's not permanently mapped is called
854 "high memory".
855
856 If you are compiling a kernel which will never run on a machine with
857 more than 1 Gigabyte total physical RAM, answer "off" here (default
858 choice and suitable for most users). This will result in a "3GB/1GB"
859 split: 3GB are mapped so that each process sees a 3GB virtual memory
860 space and the remaining part of the 4GB virtual memory space is used
861 by the kernel to permanently map as much physical memory as
862 possible.
863
864 If the machine has between 1 and 4 Gigabytes physical RAM, then
865 answer "4GB" here.
866
867 If more than 4 Gigabytes is used then answer "64GB" here. This
868 selection turns Intel PAE (Physical Address Extension) mode on.
869 PAE implements 3-level paging on IA32 processors. PAE is fully
870 supported by Linux, PAE mode is implemented on all recent Intel
871 processors (Pentium Pro and better). NOTE: If you say "64GB" here,
872 then the kernel will not boot on CPUs that don't support PAE!
873
874 The actual amount of total physical memory will either be
875 auto detected or can be forced by using a kernel command line option
876 such as "mem=256M". (Try "man bootparam" or see the documentation of
877 your boot loader (lilo or loadlin) about how to pass options to the
878 kernel at boot time.)
879
880 If unsure, say "off".
881
882config HIGHMEM4G
883 bool "4GB"
884 depends on !X86_NUMAQ
885 help
886 Select this if you have a 32-bit processor and between 1 and 4
887 gigabytes of physical RAM.
888
889config HIGHMEM64G
890 bool "64GB"
891 depends on !M386 && !M486
892 select X86_PAE
893 help
894 Select this if you have a 32-bit processor and more than 4
895 gigabytes of physical RAM.
896
897endchoice
898
899choice
900 depends on EXPERIMENTAL
901 prompt "Memory split" if EMBEDDED
902 default VMSPLIT_3G
903 depends on X86_32
904 help
905 Select the desired split between kernel and user memory.
906
907 If the address range available to the kernel is less than the
908 physical memory installed, the remaining memory will be available
909 as "high memory". Accessing high memory is a little more costly
910 than low memory, as it needs to be mapped into the kernel first.
911 Note that increasing the kernel address space limits the range
912 available to user programs, making the address space there
913 tighter. Selecting anything other than the default 3G/1G split
914 will also likely make your kernel incompatible with binary-only
915 kernel modules.
916
917 If you are not absolutely sure what you are doing, leave this
918 option alone!
919
920 config VMSPLIT_3G
921 bool "3G/1G user/kernel split"
922 config VMSPLIT_3G_OPT
923 depends on !X86_PAE
924 bool "3G/1G user/kernel split (for full 1G low memory)"
925 config VMSPLIT_2G
926 bool "2G/2G user/kernel split"
927 config VMSPLIT_2G_OPT
928 depends on !X86_PAE
929 bool "2G/2G user/kernel split (for full 2G low memory)"
930 config VMSPLIT_1G
931 bool "1G/3G user/kernel split"
932endchoice
933
934config PAGE_OFFSET
935 hex
936 default 0xB0000000 if VMSPLIT_3G_OPT
937 default 0x80000000 if VMSPLIT_2G
938 default 0x78000000 if VMSPLIT_2G_OPT
939 default 0x40000000 if VMSPLIT_1G
940 default 0xC0000000
941 depends on X86_32
942
943config HIGHMEM
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100944 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100945 depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100946
947config X86_PAE
Jan Beulich9ba16082008-10-15 22:01:38 -0700948 bool "PAE (Physical Address Extension) Support"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100949 depends on X86_32 && !HIGHMEM4G
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100950 help
951 PAE is required for NX support, and furthermore enables
952 larger swapspace support for non-overcommit purposes. It
953 has the cost of more pagetable lookup overhead, and also
954 consumes more pagetable space per process.
955
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -0700956config ARCH_PHYS_ADDR_T_64BIT
957 def_bool X86_64 || X86_PAE
958
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100959# Common NUMA Features
960config NUMA
961 bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
962 depends on SMP
Rafael J. Wysocki604d2052008-11-12 23:26:14 +0100963 depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100964 default n if X86_PC
Yinghai Lu0699eae2008-06-17 15:39:01 -0700965 default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100966 help
967 Enable NUMA (Non Uniform Memory Access) support.
968 The kernel will try to allocate memory used by a CPU on the
969 local memory controller of the CPU and add some more
970 NUMA awareness to the kernel.
971
Pavel Machek04b69442008-08-14 17:16:50 +0200972 For 32-bit this is currently highly experimental and should be only
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100973 used for kernel development. It might also cause boot failures.
Pavel Machek04b69442008-08-14 17:16:50 +0200974 For 64-bit this is recommended on all multiprocessor Opteron systems.
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100975 If the system is EM64T, you should say N unless your system is
976 EM64T NUMA.
977
978comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
979 depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
980
981config K8_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100982 def_bool y
983 prompt "Old style AMD Opteron NUMA detection"
984 depends on X86_64 && NUMA && PCI
985 help
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100986 Enable K8 NUMA node topology detection. You should say Y here if
987 you have a multi processor AMD K8 system. This uses an old
988 method to read the NUMA configuration directly from the builtin
989 Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
990 instead, which also takes priority if both are compiled in.
991
992config X86_64_ACPI_NUMA
Harvey Harrison3c2362e2008-01-30 13:31:03 +0100993 def_bool y
994 prompt "ACPI NUMA detection"
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100995 depends on X86_64 && NUMA && ACPI && PCI
996 select ACPI_NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +0100997 help
998 Enable ACPI SRAT based node topology detection.
999
Suresh Siddha6ec6e0d2008-03-25 10:14:35 -07001000# Some NUMA nodes have memory ranges that span
1001# other nodes. Even though a pfn is valid and
1002# between a node's start and end pfns, it may not
1003# reside on that node. See memmap_init_zone()
1004# for details.
1005config NODES_SPAN_OTHER_NODES
1006 def_bool y
1007 depends on X86_64_ACPI_NUMA
1008
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001009config NUMA_EMU
1010 bool "NUMA emulation"
1011 depends on X86_64 && NUMA
1012 help
1013 Enable NUMA emulation. A flat machine will be split
1014 into virtual nodes when booted with "numa=fake=N", where N is the
1015 number of nodes. This is only useful for debugging.
1016
1017config NODES_SHIFT
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001018 int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
Mike Travis1184dc22008-05-12 21:21:12 +02001019 range 1 9 if X86_64
Linus Torvaldsd25e26b2008-08-25 14:15:38 -07001020 default "9" if MAXSMP
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001021 default "6" if X86_64
1022 default "4" if X86_NUMAQ
1023 default "3"
1024 depends on NEED_MULTIPLE_NODES
Mike Travis1184dc22008-05-12 21:21:12 +02001025 help
1026 Specify the maximum number of NUMA Nodes available on the target
1027 system. Increases memory reserved to accomodate various tables.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001028
1029config HAVE_ARCH_BOOTMEM_NODE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001030 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001031 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001032
1033config ARCH_HAVE_MEMORY_PRESENT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001034 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001035 depends on X86_32 && DISCONTIGMEM
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001036
1037config NEED_NODE_MEMMAP_SIZE
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001038 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001039 depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001040
1041config HAVE_ARCH_ALLOC_REMAP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001042 def_bool y
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001043 depends on X86_32 && NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001044
1045config ARCH_FLATMEM_ENABLE
1046 def_bool y
Jeff Chua99809962008-08-06 19:09:53 +08001047 depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001048
1049config ARCH_DISCONTIGMEM_ENABLE
1050 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001051 depends on NUMA && X86_32
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001052
1053config ARCH_DISCONTIGMEM_DEFAULT
1054 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001055 depends on NUMA && X86_32
1056
1057config ARCH_SPARSEMEM_DEFAULT
1058 def_bool y
1059 depends on X86_64
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001060
1061config ARCH_SPARSEMEM_ENABLE
1062 def_bool y
Jeff Chua99809962008-08-06 19:09:53 +08001063 depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC) || X86_GENERICARCH
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001064 select SPARSEMEM_STATIC if X86_32
1065 select SPARSEMEM_VMEMMAP_ENABLE if X86_64
1066
1067config ARCH_SELECT_MEMORY_MODEL
1068 def_bool y
Christoph Lameterb2632952008-01-30 13:30:47 +01001069 depends on ARCH_SPARSEMEM_ENABLE
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001070
1071config ARCH_MEMORY_PROBE
1072 def_bool X86_64
1073 depends on MEMORY_HOTPLUG
1074
1075source "mm/Kconfig"
1076
1077config HIGHPTE
1078 bool "Allocate 3rd-level pagetables from highmem"
1079 depends on X86_32 && (HIGHMEM4G || HIGHMEM64G)
1080 help
1081 The VM uses one page table entry for each page of physical memory.
1082 For systems with a lot of RAM, this can be wasteful of precious
1083 low memory. Setting this option will put user-space page table
1084 entries in high memory.
1085
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001086config X86_CHECK_BIOS_CORRUPTION
1087 bool "Check for low memory corruption"
Jeremy Fitzhardinge9f077872008-09-07 01:51:34 -07001088 help
1089 Periodically check for memory corruption in low memory, which
1090 is suspected to be caused by BIOS. Even when enabled in the
1091 configuration, it is disabled at runtime. Enable it by
1092 setting "memory_corruption_check=1" on the kernel command
1093 line. By default it scans the low 64k of memory every 60
1094 seconds; see the memory_corruption_check_size and
1095 memory_corruption_check_period parameters in
1096 Documentation/kernel-parameters.txt to adjust this.
1097
1098 When enabled with the default parameters, this option has
1099 almost no overhead, as it reserves a relatively small amount
1100 of memory and scans it infrequently. It both detects corruption
1101 and prevents it from affecting the running system.
1102
1103 It is, however, intended as a diagnostic tool; if repeatable
1104 BIOS-originated corruption always affects the same memory,
1105 you can use memmap= to prevent the kernel from using that
1106 memory.
1107
Jeremy Fitzhardingec885df52008-09-07 02:37:32 -07001108config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
1109 bool "Set the default setting of memory_corruption_check"
1110 depends on X86_CHECK_BIOS_CORRUPTION
1111 default y
1112 help
1113 Set whether the default state of memory_corruption_check is
1114 on or off.
1115
Ingo Molnarfc381512008-09-16 10:07:34 +02001116config X86_RESERVE_LOW_64K
1117 bool "Reserve low 64K of RAM on AMI/Phoenix BIOSen"
1118 default y
1119 help
1120 Reserve the first 64K of physical RAM on BIOSes that are known
1121 to potentially corrupt that memory range. A numbers of BIOSes are
1122 known to utilize this area during suspend/resume, so it must not
1123 be used by the kernel.
1124
1125 Set this to N if you are absolutely sure that you trust the BIOS
1126 to get all its memory reservations and usages right.
1127
1128 If you have doubts about the BIOS (e.g. suspend/resume does not
1129 work or there's kernel crashes after certain hardware hotplug
1130 events) and it's not AMI or Phoenix, then you might want to enable
1131 X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check typical
1132 corruption patterns.
1133
1134 Say Y if unsure.
1135
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001136config MATH_EMULATION
1137 bool
1138 prompt "Math emulation" if X86_32
1139 ---help---
1140 Linux can emulate a math coprocessor (used for floating point
1141 operations) if you don't have one. 486DX and Pentium processors have
1142 a math coprocessor built in, 486SX and 386 do not, unless you added
1143 a 487DX or 387, respectively. (The messages during boot time can
1144 give you some hints here ["man dmesg"].) Everyone needs either a
1145 coprocessor or this emulation.
1146
1147 If you don't have a math coprocessor, you need to say Y here; if you
1148 say Y here even though you have a coprocessor, the coprocessor will
1149 be used nevertheless. (This behavior can be changed with the kernel
1150 command line option "no387", which comes handy if your coprocessor
1151 is broken. Try "man bootparam" or see the documentation of your boot
1152 loader (lilo or loadlin) about how to pass options to the kernel at
1153 boot time.) This means that it is a good idea to say Y here if you
1154 intend to use this kernel on different machines.
1155
1156 More information about the internals of the Linux math coprocessor
1157 emulation can be found in <file:arch/x86/math-emu/README>.
1158
1159 If you are not sure, say Y; apart from resulting in a 66 KB bigger
1160 kernel, it won't hurt.
1161
1162config MTRR
1163 bool "MTRR (Memory Type Range Register) support"
1164 ---help---
1165 On Intel P6 family processors (Pentium Pro, Pentium II and later)
1166 the Memory Type Range Registers (MTRRs) may be used to control
1167 processor access to memory ranges. This is most useful if you have
1168 a video (VGA) card on a PCI or AGP bus. Enabling write-combining
1169 allows bus write transfers to be combined into a larger transfer
1170 before bursting over the PCI/AGP bus. This can increase performance
1171 of image write operations 2.5 times or more. Saying Y here creates a
1172 /proc/mtrr file which may be used to manipulate your processor's
1173 MTRRs. Typically the X server should use this.
1174
1175 This code has a reasonably generic interface so that similar
1176 control registers on other processors can be easily supported
1177 as well:
1178
1179 The Cyrix 6x86, 6x86MX and M II processors have Address Range
1180 Registers (ARRs) which provide a similar functionality to MTRRs. For
1181 these, the ARRs are used to emulate the MTRRs.
1182 The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
1183 MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
1184 write-combining. All of these processors are supported by this code
1185 and it makes sense to say Y here if you have one of them.
1186
1187 Saying Y here also fixes a problem with buggy SMP BIOSes which only
1188 set the MTRRs for the boot CPU and not for the secondary CPUs. This
1189 can lead to all sorts of problems, so it's good to say Y here.
1190
1191 You can safely say Y even if your machine doesn't have MTRRs, you'll
1192 just add about 9 KB to your kernel.
1193
Randy Dunlap7225e752008-07-26 17:54:22 -07001194 See <file:Documentation/x86/mtrr.txt> for more information.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001195
Yinghai Lu95ffa242008-04-29 03:52:33 -07001196config MTRR_SANITIZER
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001197 def_bool y
Yinghai Lu95ffa242008-04-29 03:52:33 -07001198 prompt "MTRR cleanup support"
1199 depends on MTRR
1200 help
Thomas Gleixneraba37282008-07-15 14:48:48 +02001201 Convert MTRR layout from continuous to discrete, so X drivers can
1202 add writeback entries.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001203
Thomas Gleixneraba37282008-07-15 14:48:48 +02001204 Can be disabled with disable_mtrr_cleanup on the kernel command line.
1205 The largest mtrr entry size for a continous block can be set with
1206 mtrr_chunk_size.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001207
Yinghai Lu2ffb3502008-09-30 16:29:40 -07001208 If unsure, say Y.
Yinghai Lu95ffa242008-04-29 03:52:33 -07001209
1210config MTRR_SANITIZER_ENABLE_DEFAULT
Yinghai Luf5098d62008-04-29 20:25:58 -07001211 int "MTRR cleanup enable value (0-1)"
1212 range 0 1
1213 default "0"
Yinghai Lu95ffa242008-04-29 03:52:33 -07001214 depends on MTRR_SANITIZER
1215 help
Yinghai Luf5098d62008-04-29 20:25:58 -07001216 Enable mtrr cleanup default value
Yinghai Lu95ffa242008-04-29 03:52:33 -07001217
Yinghai Lu12031a62008-05-02 02:40:22 -07001218config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
1219 int "MTRR cleanup spare reg num (0-7)"
1220 range 0 7
1221 default "1"
1222 depends on MTRR_SANITIZER
1223 help
1224 mtrr cleanup spare entries default, it can be changed via
Thomas Gleixneraba37282008-07-15 14:48:48 +02001225 mtrr_spare_reg_nr=N on the kernel command line.
Yinghai Lu12031a62008-05-02 02:40:22 -07001226
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001227config X86_PAT
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001228 bool
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001229 prompt "x86 PAT support"
Ingo Molnar2a8a2712008-04-26 10:26:52 +02001230 depends on MTRR
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001231 help
1232 Use PAT attributes to setup page level cache control.
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001233
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001234 PATs are the modern equivalents of MTRRs and are much more
1235 flexible than MTRRs.
1236
1237 Say N here if you see bootup problems (boot crash, boot hang,
Venki Pallipadi042b78e2008-03-24 14:22:35 -07001238 spontaneous reboots) or a non-working video driver.
venkatesh.pallipadi@intel.com2e5d9c82008-03-18 17:00:14 -07001239
1240 If unsure, say Y.
1241
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001242config EFI
Jan Beulich9ba16082008-10-15 22:01:38 -07001243 bool "EFI runtime service support"
Huang, Ying5b836832008-01-30 13:31:19 +01001244 depends on ACPI
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001245 ---help---
Huang, Ying8b2cb7a2008-01-30 13:32:11 +01001246 This enables the kernel to use EFI runtime services that are
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001247 available (such as the EFI variable services).
1248
Huang, Ying8b2cb7a2008-01-30 13:32:11 +01001249 This option is only useful on systems that have EFI firmware.
1250 In addition, you should use the latest ELILO loader available
1251 at <http://elilo.sourceforge.net> in order to take advantage
1252 of EFI runtime services. However, even with this option, the
1253 resultant kernel should continue to boot on existing non-EFI
1254 platforms.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001255
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001256config SECCOMP
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001257 def_bool y
1258 prompt "Enable seccomp to safely compute untrusted bytecode"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001259 help
1260 This kernel feature is useful for number crunching applications
1261 that may need to compute untrusted bytecode during their
1262 execution. By using pipes or other transports made available to
1263 the process as file descriptors supporting the read/write
1264 syscalls, it's possible to isolate those applications in
1265 their own address space using seccomp. Once seccomp is
Alexey Dobriyan9c0bbee2008-09-09 11:01:31 +04001266 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001267 and the task is only allowed to execute a few safe syscalls
1268 defined by each seccomp mode.
1269
1270 If unsure, say Y. Only embedded should say N here.
1271
1272config CC_STACKPROTECTOR
1273 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
Linus Torvalds2c020a92008-02-22 08:21:38 -08001274 depends on X86_64 && EXPERIMENTAL && BROKEN
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001275 help
1276 This option turns on the -fstack-protector GCC feature. This
1277 feature puts, at the beginning of critical functions, a canary
1278 value on the stack just before the return address, and validates
1279 the value just before actually returning. Stack based buffer
1280 overflows (that need to overwrite this return address) now also
1281 overwrite the canary, which gets detected and the attack is then
1282 neutralized via a kernel panic.
1283
1284 This feature requires gcc version 4.2 or above, or a distribution
1285 gcc with the feature backported. Older versions are automatically
1286 detected and for those versions, this configuration option is ignored.
1287
1288config CC_STACKPROTECTOR_ALL
1289 bool "Use stack-protector for all functions"
1290 depends on CC_STACKPROTECTOR
1291 help
1292 Normally, GCC only inserts the canary value protection for
1293 functions that use large-ish on-stack buffers. By enabling
1294 this option, GCC will be asked to do this for ALL functions.
1295
1296source kernel/Kconfig.hz
1297
1298config KEXEC
1299 bool "kexec system call"
Ingo Molnar3e8f7e32008-04-28 10:46:58 +02001300 depends on X86_BIOS_REBOOT
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001301 help
1302 kexec is a system call that implements the ability to shutdown your
1303 current kernel, and to start another kernel. It is like a reboot
1304 but it is independent of the system firmware. And like a reboot
1305 you can start any kernel with it, not just Linux.
1306
1307 The name comes from the similarity to the exec system call.
1308
1309 It is an ongoing process to be certain the hardware in a machine
1310 is properly shutdown, so do not be surprised if this code does not
1311 initially work for you. It may help to enable device hotplugging
1312 support. As of this writing the exact hardware interface is
1313 strongly in flux, so no good recommendation can be made.
1314
1315config CRASH_DUMP
Pavel Machek04b69442008-08-14 17:16:50 +02001316 bool "kernel crash dumps"
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001317 depends on X86_64 || (X86_32 && HIGHMEM)
1318 help
1319 Generate crash dump after being started by kexec.
1320 This should be normally only set in special crash dump kernels
1321 which are loaded in the main kernel with kexec-tools into
1322 a specially reserved region and then later executed after
1323 a crash by kdump/kexec. The crash dump kernel must be compiled
1324 to a memory address not used by the main kernel or BIOS using
1325 PHYSICAL_START, or it must be built as a relocatable image
1326 (CONFIG_RELOCATABLE=y).
1327 For more details see Documentation/kdump/kdump.txt
1328
Huang Ying3ab83522008-07-25 19:45:07 -07001329config KEXEC_JUMP
1330 bool "kexec jump (EXPERIMENTAL)"
1331 depends on EXPERIMENTAL
Huang Ying89081d12008-07-25 19:45:10 -07001332 depends on KEXEC && HIBERNATION && X86_32
Huang Ying3ab83522008-07-25 19:45:07 -07001333 help
Huang Ying89081d12008-07-25 19:45:10 -07001334 Jump between original kernel and kexeced kernel and invoke
1335 code in physical address mode via KEXEC
Huang Ying3ab83522008-07-25 19:45:07 -07001336
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001337config PHYSICAL_START
1338 hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
1339 default "0x1000000" if X86_NUMAQ
1340 default "0x200000" if X86_64
1341 default "0x100000"
1342 help
1343 This gives the physical address where the kernel is loaded.
1344
1345 If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
1346 bzImage will decompress itself to above physical address and
1347 run from there. Otherwise, bzImage will run from the address where
1348 it has been loaded by the boot loader and will ignore above physical
1349 address.
1350
1351 In normal kdump cases one does not have to set/change this option
1352 as now bzImage can be compiled as a completely relocatable image
1353 (CONFIG_RELOCATABLE=y) and be used to load and run from a different
1354 address. This option is mainly useful for the folks who don't want
1355 to use a bzImage for capturing the crash dump and want to use a
1356 vmlinux instead. vmlinux is not relocatable hence a kernel needs
1357 to be specifically compiled to run from a specific memory area
1358 (normally a reserved region) and this option comes handy.
1359
1360 So if you are using bzImage for capturing the crash dump, leave
1361 the value here unchanged to 0x100000 and set CONFIG_RELOCATABLE=y.
1362 Otherwise if you plan to use vmlinux for capturing the crash dump
1363 change this value to start of the reserved region (Typically 16MB
1364 0x1000000). In other words, it can be set based on the "X" value as
1365 specified in the "crashkernel=YM@XM" command line boot parameter
1366 passed to the panic-ed kernel. Typically this parameter is set as
1367 crashkernel=64M@16M. Please take a look at
1368 Documentation/kdump/kdump.txt for more details about crash dumps.
1369
1370 Usage of bzImage for capturing the crash dump is recommended as
1371 one does not have to build two kernels. Same kernel can be used
1372 as production kernel and capture kernel. Above option should have
1373 gone away after relocatable bzImage support is introduced. But it
1374 is present because there are users out there who continue to use
1375 vmlinux for dump capture. This option should go away down the
1376 line.
1377
1378 Don't change this unless you know what you are doing.
1379
1380config RELOCATABLE
1381 bool "Build a relocatable kernel (EXPERIMENTAL)"
1382 depends on EXPERIMENTAL
1383 help
1384 This builds a kernel image that retains relocation information
1385 so it can be loaded someplace besides the default 1MB.
1386 The relocations tend to make the kernel binary about 10% larger,
1387 but are discarded at runtime.
1388
1389 One use is for the kexec on panic case where the recovery kernel
1390 must live at a different physical address than the primary
1391 kernel.
1392
1393 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
1394 it has been loaded at and the compile time physical address
1395 (CONFIG_PHYSICAL_START) is ignored.
1396
1397config PHYSICAL_ALIGN
1398 hex
1399 prompt "Alignment value to which kernel should be aligned" if X86_32
1400 default "0x100000" if X86_32
1401 default "0x200000" if X86_64
1402 range 0x2000 0x400000
1403 help
1404 This value puts the alignment restrictions on physical address
1405 where kernel is loaded and run from. Kernel is compiled for an
1406 address which meets above alignment restriction.
1407
1408 If bootloader loads the kernel at a non-aligned address and
1409 CONFIG_RELOCATABLE is set, kernel will move itself to nearest
1410 address aligned to above value and run from there.
1411
1412 If bootloader loads the kernel at a non-aligned address and
1413 CONFIG_RELOCATABLE is not set, kernel will ignore the run time
1414 load address and decompress itself to the address it has been
1415 compiled for and run from there. The address for which kernel is
1416 compiled already meets above alignment restrictions. Hence the
1417 end result is that kernel runs from a physical address meeting
1418 above alignment restrictions.
1419
1420 Don't change this unless you know what you are doing.
1421
1422config HOTPLUG_CPU
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001423 bool "Support for hot-pluggable CPUs"
1424 depends on SMP && HOTPLUG && !X86_VOYAGER
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001425 ---help---
Dimitri Sivanich7c13e6a2008-08-11 10:46:46 -05001426 Say Y here to allow turning CPUs off and on. CPUs can be
1427 controlled through /sys/devices/system/cpu.
1428 ( Note: power management support will enable this option
1429 automatically on SMP systems. )
1430 Say N if you want to disable CPU hotplug.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001431
1432config COMPAT_VDSO
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001433 def_bool y
1434 prompt "Compat VDSO support"
Roland McGrathaf65d642008-01-30 13:30:43 +01001435 depends on X86_32 || IA32_EMULATION
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001436 help
Roland McGrathaf65d642008-01-30 13:30:43 +01001437 Map the 32-bit VDSO to the predictable old-style address too.
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001438 ---help---
1439 Say N here if you are running a sufficiently recent glibc
1440 version (2.3.3 or later), to remove the high-mapped
1441 VDSO mapping and to exclusively use the randomized VDSO.
1442
1443 If unsure, say Y.
1444
Tim Bird516cbf32008-08-12 12:52:36 -07001445config CMDLINE_BOOL
1446 bool "Built-in kernel command line"
1447 default n
1448 help
1449 Allow for specifying boot arguments to the kernel at
1450 build time. On some systems (e.g. embedded ones), it is
1451 necessary or convenient to provide some or all of the
1452 kernel boot arguments with the kernel itself (that is,
1453 to not rely on the boot loader to provide them.)
1454
1455 To compile command line arguments into the kernel,
1456 set this option to 'Y', then fill in the
1457 the boot arguments in CONFIG_CMDLINE.
1458
1459 Systems with fully functional boot loaders (i.e. non-embedded)
1460 should leave this option set to 'N'.
1461
1462config CMDLINE
1463 string "Built-in kernel command string"
1464 depends on CMDLINE_BOOL
1465 default ""
1466 help
1467 Enter arguments here that should be compiled into the kernel
1468 image and used at boot time. If the boot loader provides a
1469 command line at boot time, it is appended to this string to
1470 form the full kernel command line, when the system boots.
1471
1472 However, you can use the CONFIG_CMDLINE_OVERRIDE option to
1473 change this behavior.
1474
1475 In most cases, the command line (whether built-in or provided
1476 by the boot loader) should specify the device for the root
1477 file system.
1478
1479config CMDLINE_OVERRIDE
1480 bool "Built-in command line overrides boot loader arguments"
1481 default n
1482 depends on CMDLINE_BOOL
1483 help
1484 Set this option to 'Y' to have the kernel ignore the boot loader
1485 command line, and use ONLY the built-in command line.
1486
1487 This is used to work around broken boot loaders. This should
1488 be set to 'N' under normal conditions.
1489
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001490endmenu
1491
1492config ARCH_ENABLE_MEMORY_HOTPLUG
1493 def_bool y
1494 depends on X86_64 || (X86_32 && HIGHMEM)
1495
Sam Ravnborg506f1d02007-11-09 21:56:54 +01001496config HAVE_ARCH_EARLY_PFN_TO_NID
1497 def_bool X86_64
1498 depends on NUMA
1499
Bjorn Helgaasda85f862008-11-05 13:37:27 -06001500menu "Power management and ACPI options"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001501 depends on !X86_VOYAGER
1502
1503config ARCH_HIBERNATION_HEADER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001504 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001505 depends on X86_64 && HIBERNATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001506
1507source "kernel/power/Kconfig"
1508
1509source "drivers/acpi/Kconfig"
1510
Andi Kleena6b68072008-01-30 13:32:49 +01001511config X86_APM_BOOT
1512 bool
1513 default y
1514 depends on APM || APM_MODULE
1515
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001516menuconfig APM
1517 tristate "APM (Advanced Power Management) BIOS support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001518 depends on X86_32 && PM_SLEEP
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001519 ---help---
1520 APM is a BIOS specification for saving power using several different
1521 techniques. This is mostly useful for battery powered laptops with
1522 APM compliant BIOSes. If you say Y here, the system time will be
1523 reset after a RESUME operation, the /proc/apm device will provide
1524 battery status information, and user-space programs will receive
1525 notification of APM "events" (e.g. battery status change).
1526
1527 If you select "Y" here, you can disable actual use of the APM
1528 BIOS by passing the "apm=off" option to the kernel at boot time.
1529
1530 Note that the APM support is almost completely disabled for
1531 machines with more than one CPU.
1532
1533 In order to use APM, you will need supporting software. For location
Randy Dunlap53471122008-03-12 18:10:51 -04001534 and more information, read <file:Documentation/power/pm.txt> and the
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001535 Battery Powered Linux mini-HOWTO, available from
1536 <http://www.tldp.org/docs.html#howto>.
1537
1538 This driver does not spin down disk drives (see the hdparm(8)
1539 manpage ("man 8 hdparm") for that), and it doesn't turn off
1540 VESA-compliant "green" monitors.
1541
1542 This driver does not support the TI 4000M TravelMate and the ACER
1543 486/DX4/75 because they don't have compliant BIOSes. Many "green"
1544 desktop machines also don't have compliant BIOSes, and this driver
1545 may cause those machines to panic during the boot phase.
1546
1547 Generally, if you don't have a battery in your machine, there isn't
1548 much point in using this driver and you should say N. If you get
1549 random kernel OOPSes or reboots that don't seem to be related to
1550 anything, try disabling/enabling this option (or disabling/enabling
1551 APM in your BIOS).
1552
1553 Some other things you should try when experiencing seemingly random,
1554 "weird" problems:
1555
1556 1) make sure that you have enough swap space and that it is
1557 enabled.
1558 2) pass the "no-hlt" option to the kernel
1559 3) switch on floating point emulation in the kernel and pass
1560 the "no387" option to the kernel
1561 4) pass the "floppy=nodma" option to the kernel
1562 5) pass the "mem=4M" option to the kernel (thereby disabling
1563 all but the first 4 MB of RAM)
1564 6) make sure that the CPU is not over clocked.
1565 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
1566 8) disable the cache from your BIOS settings
1567 9) install a fan for the video card or exchange video RAM
1568 10) install a better fan for the CPU
1569 11) exchange RAM chips
1570 12) exchange the motherboard.
1571
1572 To compile this driver as a module, choose M here: the
1573 module will be called apm.
1574
1575if APM
1576
1577config APM_IGNORE_USER_SUSPEND
1578 bool "Ignore USER SUSPEND"
1579 help
1580 This option will ignore USER SUSPEND requests. On machines with a
1581 compliant APM BIOS, you want to say N. However, on the NEC Versa M
1582 series notebooks, it is necessary to say Y because of a BIOS bug.
1583
1584config APM_DO_ENABLE
1585 bool "Enable PM at boot time"
1586 ---help---
1587 Enable APM features at boot time. From page 36 of the APM BIOS
1588 specification: "When disabled, the APM BIOS does not automatically
1589 power manage devices, enter the Standby State, enter the Suspend
1590 State, or take power saving steps in response to CPU Idle calls."
1591 This driver will make CPU Idle calls when Linux is idle (unless this
1592 feature is turned off -- see "Do CPU IDLE calls", below). This
1593 should always save battery power, but more complicated APM features
1594 will be dependent on your BIOS implementation. You may need to turn
1595 this option off if your computer hangs at boot time when using APM
1596 support, or if it beeps continuously instead of suspending. Turn
1597 this off if you have a NEC UltraLite Versa 33/C or a Toshiba
1598 T400CDT. This is off by default since most machines do fine without
1599 this feature.
1600
1601config APM_CPU_IDLE
1602 bool "Make CPU Idle calls when idle"
1603 help
1604 Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
1605 On some machines, this can activate improved power savings, such as
1606 a slowed CPU clock rate, when the machine is idle. These idle calls
1607 are made after the idle loop has run for some length of time (e.g.,
1608 333 mS). On some machines, this will cause a hang at boot time or
1609 whenever the CPU becomes idle. (On machines with more than one CPU,
1610 this option does nothing.)
1611
1612config APM_DISPLAY_BLANK
1613 bool "Enable console blanking using APM"
1614 help
1615 Enable console blanking using the APM. Some laptops can use this to
1616 turn off the LCD backlight when the screen blanker of the Linux
1617 virtual console blanks the screen. Note that this is only used by
1618 the virtual console screen blanker, and won't turn off the backlight
1619 when using the X Window system. This also doesn't have anything to
1620 do with your VESA-compliant power-saving monitor. Further, this
1621 option doesn't work for all laptops -- it might not turn off your
1622 backlight at all, or it might print a lot of errors to the console,
1623 especially if you are using gpm.
1624
1625config APM_ALLOW_INTS
1626 bool "Allow interrupts during APM BIOS calls"
1627 help
1628 Normally we disable external interrupts while we are making calls to
1629 the APM BIOS as a measure to lessen the effects of a badly behaving
1630 BIOS implementation. The BIOS should reenable interrupts if it
1631 needs to. Unfortunately, some BIOSes do not -- especially those in
1632 many of the newer IBM Thinkpads. If you experience hangs when you
1633 suspend, try setting this to Y. Otherwise, say N.
1634
1635config APM_REAL_MODE_POWER_OFF
1636 bool "Use real mode APM BIOS call to power off"
1637 help
1638 Use real mode APM BIOS calls to switch off the computer. This is
1639 a work-around for a number of buggy BIOSes. Switch this option on if
1640 your computer crashes instead of powering off properly.
1641
1642endif # APM
1643
1644source "arch/x86/kernel/cpu/cpufreq/Kconfig"
1645
1646source "drivers/cpuidle/Kconfig"
1647
Andy Henroid27471fd2008-10-09 11:45:22 -07001648source "drivers/idle/Kconfig"
1649
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001650endmenu
1651
1652
1653menu "Bus options (PCI etc.)"
1654
1655config PCI
Ingo Molnar1ac97012008-05-19 14:10:14 +02001656 bool "PCI support"
Adrian Bunk1c858082008-01-30 13:32:32 +01001657 default y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001658 select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
1659 help
1660 Find out whether you have a PCI motherboard. PCI is the name of a
1661 bus system, i.e. the way the CPU talks to the other stuff inside
1662 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1663 VESA. If you have PCI, say Y, otherwise N.
1664
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001665choice
1666 prompt "PCI access mode"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001667 depends on X86_32 && PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001668 default PCI_GOANY
1669 ---help---
1670 On PCI systems, the BIOS can be used to detect the PCI devices and
1671 determine their configuration. However, some old PCI motherboards
1672 have BIOS bugs and may crash if this is done. Also, some embedded
1673 PCI-based systems don't have any BIOS at all. Linux can also try to
1674 detect the PCI hardware directly without using the BIOS.
1675
1676 With this option, you can specify how Linux should detect the
1677 PCI devices. If you choose "BIOS", the BIOS will be used,
1678 if you choose "Direct", the BIOS won't be used, and if you
1679 choose "MMConfig", then PCI Express MMCONFIG will be used.
1680 If you choose "Any", the kernel will try MMCONFIG, then the
1681 direct access method and falls back to the BIOS if that doesn't
1682 work. If unsure, go with the default, which is "Any".
1683
1684config PCI_GOBIOS
1685 bool "BIOS"
1686
1687config PCI_GOMMCONFIG
1688 bool "MMConfig"
1689
1690config PCI_GODIRECT
1691 bool "Direct"
1692
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001693config PCI_GOOLPC
1694 bool "OLPC"
1695 depends on OLPC
1696
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001697config PCI_GOANY
1698 bool "Any"
1699
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001700endchoice
1701
1702config PCI_BIOS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001703 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001704 depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001705
1706# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
1707config PCI_DIRECT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001708 def_bool y
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001709 depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001710
1711config PCI_MMCONFIG
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001712 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001713 depends on X86_32 && PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001714
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001715config PCI_OLPC
Andres Salomon2bdd1b02008-06-05 14:14:41 -07001716 def_bool y
1717 depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001718
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001719config PCI_DOMAINS
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001720 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001721 depends on PCI
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001722
1723config PCI_MMCONFIG
1724 bool "Support mmconfig PCI config space access"
1725 depends on X86_64 && PCI && ACPI
1726
1727config DMAR
1728 bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
1729 depends on X86_64 && PCI_MSI && ACPI && EXPERIMENTAL
1730 help
1731 DMA remapping (DMAR) devices support enables independent address
1732 translations for Direct Memory Access (DMA) from devices.
1733 These DMA remapping devices are reported via ACPI tables
1734 and include PCI device scope covered by these DMA
1735 remapping devices.
1736
1737config DMAR_GFX_WA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001738 def_bool y
1739 prompt "Support for Graphics workaround"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001740 depends on DMAR
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001741 help
1742 Current Graphics drivers tend to use physical address
1743 for DMA and avoid using DMA APIs. Setting this config
1744 option permits the IOMMU driver to set a unity map for
1745 all the OS-visible memory. Hence the driver can continue
1746 to use physical addresses for DMA.
1747
1748config DMAR_FLOPPY_WA
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001749 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001750 depends on DMAR
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001751 help
1752 Floppy disk drivers are know to bypass DMA API calls
1753 thereby failing to work when IOMMU is enabled. This
1754 workaround will setup a 1:1 mapping for the first
1755 16M to make floppy (an ISA device) work.
1756
Suresh Siddha9fa8c482008-07-10 11:17:00 -07001757config INTR_REMAP
1758 bool "Support for Interrupt Remapping (EXPERIMENTAL)"
1759 depends on X86_64 && X86_IO_APIC && PCI_MSI && ACPI && EXPERIMENTAL
1760 help
1761 Supports Interrupt remapping for IO-APIC and MSI devices.
1762 To use x2apic mode in the CPU's which support x2APIC enhancements or
1763 to support platforms with CPU's having > 8 bit APIC ID, say Y.
1764
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001765source "drivers/pci/pcie/Kconfig"
1766
1767source "drivers/pci/Kconfig"
1768
1769# x86_64 have no ISA slots, but do have ISA-style DMA.
1770config ISA_DMA_API
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001771 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001772
1773if X86_32
1774
1775config ISA
1776 bool "ISA support"
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001777 depends on !X86_VOYAGER
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001778 help
1779 Find out whether you have ISA slots on your motherboard. ISA is the
1780 name of a bus system, i.e. the way the CPU talks to the other stuff
1781 inside your box. Other bus systems are PCI, EISA, MicroChannel
1782 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1783 newer boards don't support it. If you have ISA, say Y, otherwise N.
1784
1785config EISA
1786 bool "EISA support"
1787 depends on ISA
1788 ---help---
1789 The Extended Industry Standard Architecture (EISA) bus was
1790 developed as an open alternative to the IBM MicroChannel bus.
1791
1792 The EISA bus provided some of the features of the IBM MicroChannel
1793 bus while maintaining backward compatibility with cards made for
1794 the older ISA bus. The EISA bus saw limited use between 1988 and
1795 1995 when it was made obsolete by the PCI bus.
1796
1797 Say Y here if you are building a kernel for an EISA-based machine.
1798
1799 Otherwise, say N.
1800
1801source "drivers/eisa/Kconfig"
1802
1803config MCA
Ingo Molnarefefa6f2008-07-10 16:09:50 +02001804 bool "MCA support" if !X86_VOYAGER
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001805 default y if X86_VOYAGER
1806 help
1807 MicroChannel Architecture is found in some IBM PS/2 machines and
1808 laptops. It is a bus system similar to PCI or ISA. See
1809 <file:Documentation/mca.txt> (and especially the web page given
1810 there) before attempting to build an MCA bus kernel.
1811
1812source "drivers/mca/Kconfig"
1813
1814config SCx200
1815 tristate "NatSemi SCx200 support"
1816 depends on !X86_VOYAGER
1817 help
1818 This provides basic support for National Semiconductor's
1819 (now AMD's) Geode processors. The driver probes for the
1820 PCI-IDs of several on-chip devices, so its a good dependency
1821 for other scx200_* drivers.
1822
1823 If compiled as a module, the driver is named scx200.
1824
1825config SCx200HR_TIMER
1826 tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
1827 depends on SCx200 && GENERIC_TIME
1828 default y
1829 help
1830 This driver provides a clocksource built upon the on-chip
1831 27MHz high-resolution timer. Its also a workaround for
1832 NSC Geode SC-1100's buggy TSC, which loses time when the
1833 processor goes idle (as is done by the scheduler). The
1834 other workaround is idle=poll boot option.
1835
1836config GEODE_MFGPT_TIMER
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001837 def_bool y
1838 prompt "Geode Multi-Function General Purpose Timer (MFGPT) events"
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001839 depends on MGEODE_LX && GENERIC_TIME && GENERIC_CLOCKEVENTS
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001840 help
1841 This driver provides a clock event source based on the MFGPT
1842 timer(s) in the CS5535 and CS5536 companion chip for the geode.
1843 MFGPTs have a better resolution and max interval than the
1844 generic PIT, and are suitable for use as high-res timers.
1845
Andres Salomon3ef0e1f2008-04-29 00:59:53 -07001846config OLPC
1847 bool "One Laptop Per Child support"
1848 default n
1849 help
1850 Add support for detecting the unique features of the OLPC
1851 XO hardware.
1852
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01001853endif # X86_32
1854
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001855config K8_NB
1856 def_bool y
Sam Ravnborgbc0120f2007-11-06 23:10:39 +01001857 depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA)))
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001858
1859source "drivers/pcmcia/Kconfig"
1860
1861source "drivers/pci/hotplug/Kconfig"
1862
1863endmenu
1864
1865
1866menu "Executable file formats / Emulations"
1867
1868source "fs/Kconfig.binfmt"
1869
1870config IA32_EMULATION
1871 bool "IA32 Emulation"
1872 depends on X86_64
Roland McGratha97f52e2008-01-30 13:31:55 +01001873 select COMPAT_BINFMT_ELF
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001874 help
1875 Include code to run 32-bit programs under a 64-bit kernel. You should
1876 likely turn this on, unless you're 100% sure that you don't have any
1877 32-bit programs left.
1878
1879config IA32_AOUT
1880 tristate "IA32 a.out support"
David Woodhouse6b213e12008-06-16 12:39:13 +01001881 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001882 help
1883 Support old a.out binaries in the 32bit emulation.
1884
1885config COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001886 def_bool y
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001887 depends on IA32_EMULATION
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001888
1889config COMPAT_FOR_U64_ALIGNMENT
1890 def_bool COMPAT
1891 depends on X86_64
1892
1893config SYSVIPC_COMPAT
Harvey Harrison3c2362e2008-01-30 13:31:03 +01001894 def_bool y
Alexey Dobriyanb8992192008-09-14 13:44:41 +04001895 depends on COMPAT && SYSVIPC
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001896
1897endmenu
1898
1899
Keith Packarde5beae12008-11-03 18:21:45 +01001900config HAVE_ATOMIC_IOMAP
1901 def_bool y
1902 depends on X86_32
1903
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001904source "net/Kconfig"
1905
1906source "drivers/Kconfig"
1907
1908source "drivers/firmware/Kconfig"
1909
1910source "fs/Kconfig"
1911
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001912source "arch/x86/Kconfig.debug"
1913
1914source "security/Kconfig"
1915
1916source "crypto/Kconfig"
1917
Avi Kivityedf88412007-12-16 11:02:48 +02001918source "arch/x86/kvm/Kconfig"
1919
Sam Ravnborge279b6c2007-11-06 20:41:05 +01001920source "lib/Kconfig"