Kconfig 72.7 KB
Newer Older
S
Sam Ravnborg 已提交
1 2
# Select 32 or 64 bit
config 64BIT
3 4
	bool "64-bit kernel" if ARCH = "x86"
	default ARCH = "x86_64"
I
Ingo Molnar 已提交
5
	---help---
S
Sam Ravnborg 已提交
6 7 8 9
	  Say yes to build a 64-bit kernel - formerly known as x86_64
	  Say no to build a 32-bit kernel - formerly known as i386

config X86_32
10 11
	def_bool y
	depends on !64BIT
12
	select CLKSRC_I8253
13
	select HAVE_UID16
S
Sam Ravnborg 已提交
14 15

config X86_64
16 17
	def_bool y
	depends on 64BIT
18
	select X86_DEV_DMA_OPS
19 20

### Arch settings
21
config X86
22
	def_bool y
23
	select HAVE_AOUT if X86_32
24
	select HAVE_UNSTABLE_SCHED_CLOCK
25 26
	select ARCH_SUPPORTS_NUMA_BALANCING
	select ARCH_WANTS_PROT_NUMA_PROT_NONE
S
Sam Ravnborg 已提交
27
	select HAVE_IDE
M
Mathieu Desnoyers 已提交
28
	select HAVE_OPROFILE
29
	select HAVE_PCSPKR_PLATFORM
P
Peter Zijlstra 已提交
30
	select HAVE_PERF_EVENTS
31
	select HAVE_IRQ_WORK
32
	select HAVE_IOREMAP_PROT
M
Mathieu Desnoyers 已提交
33
	select HAVE_KPROBES
34
	select HAVE_MEMBLOCK
T
Tejun Heo 已提交
35
	select HAVE_MEMBLOCK_NODE_MAP
36
	select ARCH_DISCARD_MEMBLOCK
I
Ingo Molnar 已提交
37
	select ARCH_WANT_OPTIONAL_GPIOLIB
38
	select ARCH_WANT_FRAME_POINTERS
39
	select HAVE_DMA_ATTRS
40
	select HAVE_DMA_CONTIGUOUS if !SWIOTLB
41
	select HAVE_KRETPROBES
42
	select HAVE_OPTPROBES
43
	select HAVE_KPROBES_ON_FTRACE
44
	select HAVE_FTRACE_MCOUNT_RECORD
45
	select HAVE_FENTRY if X86_64
46
	select HAVE_C_RECORDMCOUNT
47
	select HAVE_DYNAMIC_FTRACE
48
	select HAVE_DYNAMIC_FTRACE_WITH_REGS
49
	select HAVE_FUNCTION_TRACER
50
	select HAVE_FUNCTION_GRAPH_TRACER
51
	select HAVE_FUNCTION_GRAPH_FP_TEST
52
	select HAVE_FUNCTION_TRACE_MCOUNT_TEST
53
	select HAVE_SYSCALL_TRACEPOINTS
54
	select SYSCTL_EXCEPTION_TRACE
55
	select HAVE_KVM
56
	select HAVE_ARCH_KGDB
57
	select HAVE_ARCH_TRACEHOOK
58
	select HAVE_GENERIC_DMA_COHERENT if X86_32
59
	select HAVE_EFFICIENT_UNALIGNED_ACCESS
60
	select USER_STACKTRACE_SUPPORT
61
	select HAVE_REGS_AND_STACK_ACCESS_API
62
	select HAVE_DMA_API_DEBUG
63 64 65
	select HAVE_KERNEL_GZIP
	select HAVE_KERNEL_BZIP2
	select HAVE_KERNEL_LZMA
L
Lasse Collin 已提交
66
	select HAVE_KERNEL_XZ
67
	select HAVE_KERNEL_LZO
68
	select HAVE_HW_BREAKPOINT
69
	select HAVE_MIXED_BREAKPOINTS_REGS
70
	select PERF_EVENTS
71
	select HAVE_PERF_EVENTS_NMI
72
	select HAVE_PERF_REGS
73
	select HAVE_PERF_USER_STACK_DUMP
74
	select HAVE_DEBUG_KMEMLEAK
75
	select ANON_INODES
76 77
	select HAVE_ALIGNED_STRUCT_PAGE if SLUB
	select HAVE_CMPXCHG_LOCAL
78
	select HAVE_CMPXCHG_DOUBLE
79
	select HAVE_ARCH_KMEMCHECK
A
Avi Kivity 已提交
80
	select HAVE_USER_RETURN_NOTIFIER
81
	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
82
	select HAVE_ARCH_JUMP_LABEL
83
	select HAVE_TEXT_POKE_SMP
T
Thomas Gleixner 已提交
84
	select HAVE_GENERIC_HARDIRQS
85
	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
86
	select SPARSE_IRQ
87
	select GENERIC_FIND_FIRST_BIT
T
Thomas Gleixner 已提交
88 89
	select GENERIC_IRQ_PROBE
	select GENERIC_PENDING_IRQ if SMP
90
	select GENERIC_IRQ_SHOW
91
	select GENERIC_CLOCKEVENTS_MIN_ADJUST
92
	select IRQ_FORCED_THREADING
93
	select USE_GENERIC_SMP_HELPERS if SMP
94
	select HAVE_BPF_JIT if X86_64
95
	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
96
	select CLKEVT_I8253
97
	select ARCH_HAVE_NMI_SAFE_CMPXCHG
98
	select GENERIC_IOMAP
99
	select DCACHE_WORD_ACCESS
100
	select GENERIC_SMP_IDLE_THREAD
101
	select ARCH_WANT_IPC_PARSE_VERSION if X86_32
102
	select HAVE_ARCH_SECCOMP_FILTER
103
	select BUILDTIME_EXTABLE_SORT
T
Thomas Gleixner 已提交
104 105 106 107 108 109 110
	select GENERIC_CMOS_UPDATE
	select CLOCKSOURCE_WATCHDOG
	select GENERIC_CLOCKEVENTS
	select ARCH_CLOCKSOURCE_DATA if X86_64
	select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC)
	select GENERIC_TIME_VSYSCALL if X86_64
	select KTIME_SCALAR if X86_32
111
	select GENERIC_STRNCPY_FROM_USER
112
	select GENERIC_STRNLEN_USER
113
	select HAVE_CONTEXT_TRACKING if X86_64
114
	select HAVE_IRQ_TIME_ACCOUNTING
115 116
	select MODULES_USE_ELF_REL if X86_32
	select MODULES_USE_ELF_RELA if X86_64
117
	select CLONE_BACKWARDS if X86_32
118
	select GENERIC_SIGALTSTACK
119

120
config INSTRUCTION_DECODER
121 122
	def_bool y
	depends on KPROBES || PERF_EVENTS || UPROBES
123

124 125 126 127 128
config OUTPUT_FORMAT
	string
	default "elf32-i386" if X86_32
	default "elf64-x86-64" if X86_64

129
config ARCH_DEFCONFIG
130
	string
131 132
	default "arch/x86/configs/i386_defconfig" if X86_32
	default "arch/x86/configs/x86_64_defconfig" if X86_64
133

134
config LOCKDEP_SUPPORT
135
	def_bool y
136 137

config STACKTRACE_SUPPORT
138
	def_bool y
139

140 141 142
config HAVE_LATENCYTOP_SUPPORT
	def_bool y

143
config MMU
144
	def_bool y
145 146 147 148

config SBUS
	bool

149
config NEED_DMA_MAP_STATE
150 151
	def_bool y
	depends on X86_64 || INTEL_IOMMU || DMA_API_DEBUG
152

153
config NEED_SG_DMA_LENGTH
154
	def_bool y
155

156
config GENERIC_ISA_DMA
157 158
	def_bool y
	depends on ISA_DMA_API
159 160

config GENERIC_BUG
161
	def_bool y
162
	depends on BUG
163 164 165 166
	select GENERIC_BUG_RELATIVE_POINTERS if X86_64

config GENERIC_BUG_RELATIVE_POINTERS
	bool
167 168

config GENERIC_HWEIGHT
169
	def_bool y
170

171
config GENERIC_GPIO
172
	bool
173

174
config ARCH_MAY_HAVE_PC_FDC
175 176
	def_bool y
	depends on ISA_DMA_API
177

178
config RWSEM_XCHGADD_ALGORITHM
179
	def_bool y
180 181 182 183

config GENERIC_CALIBRATE_DELAY
	def_bool y

184 185 186
config ARCH_HAS_CPU_RELAX
	def_bool y

187 188 189
config ARCH_HAS_DEFAULT_IDLE
	def_bool y

190 191 192
config ARCH_HAS_CACHE_LINE_SIZE
	def_bool y

193 194 195
config ARCH_HAS_CPU_AUTOPROBE
	def_bool y

196
config HAVE_SETUP_PER_CPU_AREA
197
	def_bool y
198

199 200 201 202
config NEED_PER_CPU_EMBED_FIRST_CHUNK
	def_bool y

config NEED_PER_CPU_PAGE_FIRST_CHUNK
203 204
	def_bool y

205 206 207
config ARCH_HIBERNATION_POSSIBLE
	def_bool y

J
Johannes Berg 已提交
208 209 210
config ARCH_SUSPEND_POSSIBLE
	def_bool y

211 212 213 214 215 216 217 218
config ZONE_DMA32
	bool
	default X86_64

config AUDIT_ARCH
	bool
	default X86_64

219 220 221
config ARCH_SUPPORTS_OPTIMIZED_INLINING
	def_bool y

A
Akinobu Mita 已提交
222 223 224
config ARCH_SUPPORTS_DEBUG_PAGEALLOC
	def_bool y

225 226
config HAVE_INTEL_TXT
	def_bool y
227
	depends on EXPERIMENTAL && INTEL_IOMMU && ACPI
228

229 230 231 232 233 234 235 236
config X86_32_SMP
	def_bool y
	depends on X86_32 && SMP

config X86_64_SMP
	def_bool y
	depends on X86_64 && SMP

237
config X86_HT
J
Jan Beulich 已提交
238
	def_bool y
239
	depends on SMP
240

241 242
config X86_32_LAZY_GS
	def_bool y
243
	depends on X86_32 && !CC_STACKPROTECTOR
244

245 246 247 248 249
config ARCH_HWEIGHT_CFLAGS
	string
	default "-fcall-saved-ecx -fcall-saved-edx" if X86_32
	default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64

250 251 252 253
config ARCH_CPU_PROBE_RELEASE
	def_bool y
	depends on HOTPLUG_CPU

254 255 256
config ARCH_SUPPORTS_UPROBES
	def_bool y

257
source "init/Kconfig"
258
source "kernel/Kconfig.freezer"
259

260 261
menu "Processor type and features"

262 263 264 265 266 267 268 269 270 271
config ZONE_DMA
	bool "DMA memory allocation support" if EXPERT
	default y
	help
	  DMA memory allocation support allows devices with less than 32-bit
	  addressing to allocate within the first 16MB of address space.
	  Disable if no such devices will be used.

	  If unsure, say Y.

272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293
config SMP
	bool "Symmetric multi-processing support"
	---help---
	  This enables support for systems with more than one CPU. If you have
	  a system with only one CPU, like most personal computers, say N. If
	  you have a system with more than one CPU, say Y.

	  If you say N here, the kernel will run on single and multiprocessor
	  machines, but will use only one CPU of a multiprocessor machine. If
	  you say Y here, the kernel will run on many, but not all,
	  singleprocessor machines. On a singleprocessor machine, the kernel
	  will run faster if you say N here.

	  Note that if you say Y here and choose architecture "586" or
	  "Pentium" under "Processor family", the kernel will not work on 486
	  architectures. Similarly, multiprocessor kernels for the "PPro"
	  architecture may not work on all Pentium based boards.

	  People using multiprocessor machines who say Y here should also say
	  Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
	  Management" code will be disabled if you say Y here.

P
Paul Bolle 已提交
294
	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
295 296 297 298 299
	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
	  <http://www.tldp.org/docs.html#howto>.

	  If you don't know what to do here, say N.

Y
Yinghai Lu 已提交
300 301
config X86_X2APIC
	bool "Support x2apic"
302
	depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP
Y
Yinghai Lu 已提交
303 304 305 306 307 308 309 310
	---help---
	  This enables x2apic support on CPUs that have this feature.

	  This allows 32-bit apic IDs (so it can support very large systems),
	  and accesses the local apic via MSRs not via mmio.

	  If you don't know what to do here, say N.

311
config X86_MPPARSE
312
	bool "Enable MPS table" if ACPI || SFI
313
	default y
314
	depends on X86_LOCAL_APIC
I
Ingo Molnar 已提交
315
	---help---
316 317 318
	  For old smp systems that do not have proper acpi support. Newer systems
	  (esp with 64bit cpus) with acpi support, MADT and DSDT will override it

319 320 321
config X86_BIGSMP
	bool "Support for big SMP systems with more than 8 CPUs"
	depends on X86_32 && SMP
I
Ingo Molnar 已提交
322
	---help---
323
	  This option is needed for the systems that have more than 8 CPUs
324

325
if X86_32
326 327 328
config X86_EXTENDED_PLATFORM
	bool "Support for extended (non-PC) x86 platforms"
	default y
I
Ingo Molnar 已提交
329
	---help---
330 331 332 333
	  If you disable this option then the kernel will only support
	  standard PC platforms. (which covers the vast majority of
	  systems out there.)

334 335 336 337 338 339
	  If you enable this option then you'll be able to select support
	  for the following (non-PC) 32 bit x86 platforms:
		AMD Elan
		NUMAQ (IBM/Sequent)
		RDC R-321x SoC
		SGI 320/540 (Visual Workstation)
340
		STA2X11-based (e.g. Northville)
341 342
		Summit/EXA (IBM x440)
		Unisys ES7000 IA32 series
343
		Moorestown MID devices
344 345 346

	  If you have one of these systems, or if you want to build a
	  generic distribution kernel, say Y here - otherwise say N.
347
endif
348

349 350 351 352 353 354 355 356 357 358 359
if X86_64
config X86_EXTENDED_PLATFORM
	bool "Support for extended (non-PC) x86 platforms"
	default y
	---help---
	  If you disable this option then the kernel will only support
	  standard PC platforms. (which covers the vast majority of
	  systems out there.)

	  If you enable this option then you'll be able to select support
	  for the following (non-PC) 64 bit x86 platforms:
S
Steffen Persvold 已提交
360
		Numascale NumaChip
361 362 363 364 365 366
		ScaleMP vSMP
		SGI Ultraviolet

	  If you have one of these systems, or if you want to build a
	  generic distribution kernel, say Y here - otherwise say N.
endif
367 368
# This is an alphabetically sorted list of 64 bit extended platforms
# Please maintain the alphabetic order if and when there are additions
S
Steffen Persvold 已提交
369 370 371 372 373 374 375
config X86_NUMACHIP
	bool "Numascale NumaChip"
	depends on X86_64
	depends on X86_EXTENDED_PLATFORM
	depends on NUMA
	depends on SMP
	depends on X86_X2APIC
376
	depends on PCI_MMCONFIG
S
Steffen Persvold 已提交
377 378 379 380
	---help---
	  Adds support for Numascale NumaChip large-SMP systems. Needed to
	  enable more than ~168 cores.
	  If you don't have one of these, you should say N here.
381

382 383
config X86_VSMP
	bool "ScaleMP vSMP"
384
	select PARAVIRT_GUEST
385 386 387
	select PARAVIRT
	depends on X86_64 && PCI
	depends on X86_EXTENDED_PLATFORM
388
	depends on SMP
I
Ingo Molnar 已提交
389
	---help---
390 391 392
	  Support for ScaleMP vSMP systems.  Say 'Y' here if this kernel is
	  supposed to run on these EM64T-based machines.  Only choose this option
	  if you have one of these machines.
393

N
Nick Piggin 已提交
394 395 396
config X86_UV
	bool "SGI Ultraviolet"
	depends on X86_64
397
	depends on X86_EXTENDED_PLATFORM
398
	depends on NUMA
399
	depends on X86_X2APIC
I
Ingo Molnar 已提交
400
	---help---
N
Nick Piggin 已提交
401 402 403
	  This option is needed in order to support SGI Ultraviolet systems.
	  If you don't have one of these, you should say N here.

404 405
# Following is an alphabetically sorted list of 32 bit extended platforms
# Please maintain the alphabetic order if and when there are additions
406

T
Thomas Gleixner 已提交
407 408 409 410 411 412
config X86_INTEL_CE
	bool "CE4100 TV platform"
	depends on PCI
	depends on PCI_GODIRECT
	depends on X86_32
	depends on X86_EXTENDED_PLATFORM
413
	select X86_REBOOTFIXUPS
414 415
	select OF
	select OF_EARLY_FLATTREE
416
	select IRQ_DOMAIN
T
Thomas Gleixner 已提交
417 418 419 420 421
	---help---
	  Select for the Intel CE media processor (CE4100) SOC.
	  This option compiles in support for the CE4100 SOC for settop
	  boxes and media devices.

422
config X86_WANT_INTEL_MID
423 424 425 426 427 428 429 430
	bool "Intel MID platform support"
	depends on X86_32
	depends on X86_EXTENDED_PLATFORM
	---help---
	  Select to build a kernel capable of supporting Intel MID platform
	  systems which do not have the PCI legacy interfaces (Moorestown,
	  Medfield). If you are building for a PC class system say N here.

431
if X86_WANT_INTEL_MID
432

A
Alan Cox 已提交
433 434 435
config X86_INTEL_MID
	bool

436 437 438 439 440
config X86_MDFLD
       bool "Medfield MID platform"
	depends on PCI
	depends on PCI_GOANY
	depends on X86_IO_APIC
441 442 443
	select X86_INTEL_MID
	select SFI
	select DW_APB_TIMER
444 445 446 447 448
	select APB_TIMER
	select I2C
	select SPI
	select INTEL_SCU_IPC
	select X86_PLATFORM_DEVICES
449
	select MFD_INTEL_MSIC
450 451 452 453 454 455 456
	---help---
	  Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin
	  Internet Device(MID) platform. 
	  Unlike standard x86 PCs, Medfield does not have many legacy devices
	  nor standard legacy replacement devices/features. e.g. Medfield does
	  not contain i8259, i8254, HPET, legacy BIOS, most of the io ports.

457 458
endif

459 460
config X86_RDC321X
	bool "RDC R-321x SoC"
461
	depends on X86_32
462 463 464 465 466 467 468 469
	depends on X86_EXTENDED_PLATFORM
	select M486
	select X86_REBOOTFIXUPS
	---help---
	  This option is needed for RDC R-321x system-on-chip, also known
	  as R-8610-(G).
	  If you don't have one of these chips, you should say N here.

470
config X86_32_NON_STANDARD
471 472
	bool "Support non-standard 32-bit SMP architectures"
	depends on X86_32 && SMP
473
	depends on X86_EXTENDED_PLATFORM
I
Ingo Molnar 已提交
474
	---help---
475 476 477 478
	  This option compiles in the NUMAQ, Summit, bigsmp, ES7000,
	  STA2X11, default subarchitectures.  It is intended for a generic
	  binary kernel. If you select them all, kernel will probe it
	  one by one and will fallback to default.
479

480
# Alphabetically sorted list of Non standard 32 bit platforms
481

482 483
config X86_NUMAQ
	bool "NUMAQ (IBM/Sequent)"
484
	depends on X86_32_NON_STANDARD
485
	depends on PCI
486
	select NUMA
487
	select X86_MPPARSE
I
Ingo Molnar 已提交
488
	---help---
489 490 491 492 493
	  This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
	  NUMA multiquad box. This changes the way that processors are
	  bootstrapped, and uses Clustered Logical APIC addressing mode instead
	  of Flat Logical.  You will need a new lynxer.elf file to flash your
	  firmware with - send email to <Martin.Bligh@us.ibm.com>.
494

495
config X86_SUPPORTS_MEMORY_FAILURE
J
Jan Beulich 已提交
496
	def_bool y
497 498 499 500 501 502 503 504
	# MCE code calls memory_failure():
	depends on X86_MCE
	# On 32-bit this adds too big of NODES_SHIFT and we run out of page flags:
	depends on !X86_NUMAQ
	# On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH:
	depends on X86_64 || !SPARSEMEM
	select ARCH_SUPPORTS_MEMORY_FAILURE

505 506
config X86_VISWS
	bool "SGI 320/540 (Visual Workstation)"
507 508 509
	depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT
	depends on X86_32_NON_STANDARD
	---help---
510 511 512 513 514 515 516 517
	  The SGI Visual Workstation series is an IA32-based workstation
	  based on SGI systems chips with some legacy PC hardware attached.

	  Say Y here to create a kernel to run on the SGI 320 or 540.

	  A kernel compiled for the Visual Workstation will run on general
	  PCs as well. See <file:Documentation/sgi-visws.txt> for details.

518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533
config STA2X11
	bool "STA2X11 Companion Chip Support"
	depends on X86_32_NON_STANDARD && PCI
	select X86_DEV_DMA_OPS
	select X86_DMA_REMAP
	select SWIOTLB
	select MFD_STA2X11
	select ARCH_REQUIRE_GPIOLIB
	default n
	---help---
	  This adds support for boards based on the STA2X11 IO-Hub,
	  a.k.a. "ConneXt". The chip is used in place of the standard
	  PC chipset, so all "standard" peripherals are missing. If this
	  option is selected the kernel will still be able to boot on
	  standard PC machines.

534 535
config X86_SUMMIT
	bool "Summit/EXA (IBM x440)"
536
	depends on X86_32_NON_STANDARD
I
Ingo Molnar 已提交
537
	---help---
538 539
	  This option is needed for IBM systems that use the Summit/EXA chipset.
	  In particular, it is needed for the x440.
I
Ingo Molnar 已提交
540

541
config X86_ES7000
542
	bool "Unisys ES7000 IA32 series"
543
	depends on X86_32_NON_STANDARD && X86_BIGSMP
I
Ingo Molnar 已提交
544
	---help---
545 546 547
	  Support for Unisys ES7000 systems.  Say 'Y' here if this kernel is
	  supposed to run on an IA32-based Unisys ES7000 system.

548 549 550 551 552 553 554 555 556 557 558 559 560
config X86_32_IRIS
	tristate "Eurobraille/Iris poweroff module"
	depends on X86_32
	---help---
	  The Iris machines from EuroBraille do not have APM or ACPI support
	  to shut themselves down properly.  A special I/O sequence is
	  needed to do so, which is what this module does at
	  kernel shutdown.

	  This is only for Iris machines from EuroBraille.

	  If unused, say N.

561
config SCHED_OMIT_FRAME_POINTER
562 563
	def_bool y
	prompt "Single-depth WCHAN output"
564
	depends on X86
I
Ingo Molnar 已提交
565
	---help---
566 567 568 569 570 571 572 573 574
	  Calculate simpler /proc/<PID>/wchan values. If this option
	  is disabled then wchan values will recurse back to the
	  caller function. This provides more accurate wchan values,
	  at the expense of slightly more scheduling overhead.

	  If in doubt, say "Y".

menuconfig PARAVIRT_GUEST
	bool "Paravirtualized guest support"
I
Ingo Molnar 已提交
575
	---help---
576 577 578 579 580 581 582
	  Say Y here to get to see options related to running Linux under
	  various hypervisors.  This option alone does not add any kernel code.

	  If you say N, all options in this submenu will be skipped and disabled.

if PARAVIRT_GUEST

583 584 585 586 587 588 589 590 591 592 593 594
config PARAVIRT_TIME_ACCOUNTING
	bool "Paravirtual steal time accounting"
	select PARAVIRT
	default n
	---help---
	  Select this option to enable fine granularity task steal time
	  accounting. Time spent executing other tasks in parallel with
	  the current vCPU is discounted from the vCPU power. To account for
	  that, there can be a small performance impact.

	  If in doubt, say N here.

595 596
source "arch/x86/xen/Kconfig"

597
config KVM_GUEST
598 599
	bool "KVM Guest support (including kvmclock)"
	select PARAVIRT
600
	select PARAVIRT
601 602
	select PARAVIRT_CLOCK
	default y if PARAVIRT_GUEST
I
Ingo Molnar 已提交
603 604
	---help---
	  This option enables various optimizations for running under the KVM
605 606 607 608
	  hypervisor. It includes a paravirtualized clock, so that instead
	  of relying on a PIT (or probably other) emulation by the
	  underlying device model, the host provides the guest with
	  timing infrastructure such as time of day, and system time
609

610 611
source "arch/x86/lguest/Kconfig"

612 613
config PARAVIRT
	bool "Enable paravirtualization code"
I
Ingo Molnar 已提交
614
	---help---
615 616 617 618 619
	  This changes the kernel so it can modify itself when it is run
	  under a hypervisor, potentially improving performance significantly
	  over full virtualization.  However, when run without a hypervisor
	  the kernel is theoretically slower and slightly larger.

620 621 622 623 624 625 626 627 628 629 630 631 632
config PARAVIRT_SPINLOCKS
	bool "Paravirtualization layer for spinlocks"
	depends on PARAVIRT && SMP && EXPERIMENTAL
	---help---
	  Paravirtualized spinlocks allow a pvops backend to replace the
	  spinlock implementation with something virtualization-friendly
	  (for example, block the virtual CPU rather than spinning).

	  Unfortunately the downside is an up to 5% performance hit on
	  native kernels, with various workloads.

	  If you are unsure how to answer this question, answer N.

633 634 635
config PARAVIRT_CLOCK
	bool

636 637
endif

638
config PARAVIRT_DEBUG
I
Ingo Molnar 已提交
639 640 641 642 643
	bool "paravirt-ops debugging"
	depends on PARAVIRT && DEBUG_KERNEL
	---help---
	  Enable to debug paravirt_ops internals.  Specifically, BUG if
	  a paravirt_op is missing when it is called.
644

645
config NO_BOOTMEM
Y
Yinghai Lu 已提交
646
	def_bool y
647

648 649
config MEMTEST
	bool "Memtest"
I
Ingo Molnar 已提交
650
	---help---
Y
Yinghai Lu 已提交
651
	  This option adds a kernel parameter 'memtest', which allows memtest
652
	  to be set.
I
Ingo Molnar 已提交
653 654 655 656
	        memtest=0, mean disabled; -- default
	        memtest=1, mean do 1 test pattern;
	        ...
	        memtest=4, mean do 4 test patterns.
T
Thomas Gleixner 已提交
657
	  If you are unsure how to answer this question, answer N.
658 659

config X86_SUMMIT_NUMA
660
	def_bool y
661
	depends on X86_32 && NUMA && X86_32_NON_STANDARD
662 663

config X86_CYCLONE_TIMER
664
	def_bool y
665
	depends on X86_SUMMIT
666 667 668 669

source "arch/x86/Kconfig.cpu"

config HPET_TIMER
670
	def_bool X86_64
671
	prompt "HPET Timer Support" if X86_32
I
Ingo Molnar 已提交
672 673 674 675 676 677 678 679 680
	---help---
	  Use the IA-PC HPET (High Precision Event Timer) to manage
	  time in preference to the PIT and RTC, if a HPET is
	  present.
	  HPET is the next generation timer replacing legacy 8254s.
	  The HPET provides a stable time base on SMP
	  systems, unlike the TSC, but it is more expensive to access,
	  as it is off-chip.  You can find the HPET spec at
	  <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>.
681

I
Ingo Molnar 已提交
682 683 684
	  You can safely choose Y here.  However, HPET will only be
	  activated if the platform and the BIOS support this feature.
	  Otherwise the 8254 will be used for timing services.
685

I
Ingo Molnar 已提交
686
	  Choose N to continue using the legacy 8254 timer.
687 688

config HPET_EMULATE_RTC
689
	def_bool y
690
	depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
691

692
config APB_TIMER
693 694
       def_bool y if X86_INTEL_MID
       prompt "Intel MID APB Timer Support" if X86_INTEL_MID
695
       select DW_APB_TIMER
A
Alan Cox 已提交
696
       depends on X86_INTEL_MID && SFI
697 698 699 700 701 702 703
       help
         APB timer is the replacement for 8254, HPET on X86 MID platforms.
         The APBT provides a stable time base on SMP
         systems, unlike the TSC, but it is more expensive to access,
         as it is off-chip. APB timers are always running regardless of CPU
         C states, they are used as per CPU clockevent device when possible.

704
# Mark as expert because too many people got it wrong.
705
# The code disables itself when not needed.
706 707
config DMI
	default y
708
	bool "Enable DMI scanning" if EXPERT
I
Ingo Molnar 已提交
709
	---help---
710 711 712 713 714
	  Enabled scanning of DMI to identify machine quirks. Say Y
	  here unless you have verified that your setup is not
	  affected by entries in the DMI blacklist. Required by PNP
	  BIOS code.

715
config GART_IOMMU
716
	bool "GART IOMMU support" if EXPERT
717 718
	default y
	select SWIOTLB
719
	depends on X86_64 && PCI && AMD_NB
I
Ingo Molnar 已提交
720
	---help---
721 722 723 724 725 726 727 728 729 730 731 732 733 734
	  Support for full DMA access of devices with 32bit memory access only
	  on systems with more than 3GB. This is usually needed for USB,
	  sound, many IDE/SATA chipsets and some other devices.
	  Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
	  based hardware IOMMU and a software bounce buffer based IOMMU used
	  on Intel systems and as fallback.
	  The code is only active when needed (enough memory and limited
	  device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
	  too.

config CALGARY_IOMMU
	bool "IBM Calgary IOMMU support"
	select SWIOTLB
	depends on X86_64 && PCI && EXPERIMENTAL
I
Ingo Molnar 已提交
735
	---help---
736 737 738 739 740 741 742 743 744 745 746 747 748 749
	  Support for hardware IOMMUs in IBM's xSeries x366 and x460
	  systems. Needed to run systems with more than 3GB of memory
	  properly with 32-bit PCI devices that do not support DAC
	  (Double Address Cycle). Calgary also supports bus level
	  isolation, where all DMAs pass through the IOMMU.  This
	  prevents them from going anywhere except their intended
	  destination. This catches hard-to-find kernel bugs and
	  mis-behaving drivers and devices that do not use the DMA-API
	  properly to set up their DMA buffers.  The IOMMU can be
	  turned off at boot time with the iommu=off parameter.
	  Normally the kernel will make the right choice by itself.
	  If unsure, say Y.

config CALGARY_IOMMU_ENABLED_BY_DEFAULT
750 751
	def_bool y
	prompt "Should Calgary be enabled by default?"
752
	depends on CALGARY_IOMMU
I
Ingo Molnar 已提交
753
	---help---
754 755 756 757 758 759 760 761
	  Should Calgary be enabled by default? if you choose 'y', Calgary
	  will be used (if it exists). If you choose 'n', Calgary will not be
	  used even if it exists. If you choose 'n' and would like to use
	  Calgary anyway, pass 'iommu=calgary' on the kernel command line.
	  If unsure, say Y.

# need this always selected by IOMMU for the VIA workaround
config SWIOTLB
J
Joerg Roedel 已提交
762
	def_bool y if X86_64
I
Ingo Molnar 已提交
763
	---help---
764
	  Support for software bounce buffers used on x86-64 systems
765 766 767 768
	  which don't have a hardware IOMMU. Using this PCI devices
	  which can only access 32-bits of memory can be used on systems
	  with more than 3 GB of memory.
	  If unsure, say Y.
769

770
config IOMMU_HELPER
771 772
	def_bool y
	depends on CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU
773

774
config MAXSMP
775
	bool "Enable Maximum number of SMP Processors and NUMA Nodes"
M
Mike Travis 已提交
776 777
	depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
	select CPUMASK_OFFSTACK
I
Ingo Molnar 已提交
778
	---help---
779
	  Enable maximum number of CPUS and NUMA Nodes for this architecture.
780
	  If unsure, say N.
781 782

config NR_CPUS
M
Mike Travis 已提交
783
	int "Maximum number of CPUs" if SMP && !MAXSMP
784
	range 2 8 if SMP && X86_32 && !X86_BIGSMP
M
Mike Travis 已提交
785
	range 2 512 if SMP && !MAXSMP
M
Mike Travis 已提交
786
	default "1" if !SMP
787
	default "4096" if MAXSMP
M
Mike Travis 已提交
788 789
	default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000)
	default "8" if SMP
I
Ingo Molnar 已提交
790
	---help---
791
	  This allows you to specify the maximum number of CPUs which this
792
	  kernel will support.  The maximum supported value is 512 and the
793 794 795 796 797 798 799
	  minimum value which makes sense is 2.

	  This is purely to save memory - each supported CPU adds
	  approximately eight kilobytes to the kernel image.

config SCHED_SMT
	bool "SMT (Hyperthreading) scheduler support"
800
	depends on X86_HT
I
Ingo Molnar 已提交
801
	---help---
802 803 804 805 806 807
	  SMT scheduler support improves the CPU scheduler's decision making
	  when dealing with Intel Pentium 4 chips with HyperThreading at a
	  cost of slightly increased overhead in some places. If unsure say
	  N here.

config SCHED_MC
808 809
	def_bool y
	prompt "Multi-core scheduler support"
810
	depends on X86_HT
I
Ingo Molnar 已提交
811
	---help---
812 813 814 815 816 817 818 819
	  Multi-core scheduler support improves the CPU scheduler's decision
	  making when dealing with multi-core CPU chips at a cost of slightly
	  increased overhead in some places. If unsure say N here.

source "kernel/Kconfig.preempt"

config X86_UP_APIC
	bool "Local APIC support on uniprocessors"
820
	depends on X86_32 && !SMP && !X86_32_NON_STANDARD
I
Ingo Molnar 已提交
821
	---help---
822 823 824 825 826 827 828 829 830 831 832 833
	  A local APIC (Advanced Programmable Interrupt Controller) is an
	  integrated interrupt controller in the CPU. If you have a single-CPU
	  system which has a processor with a local APIC, you can say Y here to
	  enable and use it. If you say Y here even though your machine doesn't
	  have a local APIC, then the kernel will still run with no slowdown at
	  all. The local APIC supports CPU-generated self-interrupts (timer,
	  performance counters), and the NMI watchdog which detects hard
	  lockups.

config X86_UP_IOAPIC
	bool "IO-APIC support on uniprocessors"
	depends on X86_UP_APIC
I
Ingo Molnar 已提交
834
	---help---
835 836 837 838 839 840 841 842 843
	  An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
	  SMP-capable replacement for PC-style interrupt controllers. Most
	  SMP systems and many recent uniprocessor systems have one.

	  If you have a single-CPU system with an IO-APIC, you can say Y here
	  to use it. If you say Y here even though your machine doesn't have
	  an IO-APIC, then the kernel will still run with no slowdown at all.

config X86_LOCAL_APIC
844
	def_bool y
845
	depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC
846 847

config X86_IO_APIC
848
	def_bool y
849
	depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC
850 851

config X86_VISWS_APIC
852
	def_bool y
853 854
	depends on X86_32 && X86_VISWS

855 856 857
config X86_REROUTE_FOR_BROKEN_BOOT_IRQS
	bool "Reroute for broken boot IRQs"
	depends on X86_IO_APIC
I
Ingo Molnar 已提交
858
	---help---
859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877
	  This option enables a workaround that fixes a source of
	  spurious interrupts. This is recommended when threaded
	  interrupt handling is used on systems where the generation of
	  superfluous "boot interrupts" cannot be disabled.

	  Some chipsets generate a legacy INTx "boot IRQ" when the IRQ
	  entry in the chipset's IO-APIC is masked (as, e.g. the RT
	  kernel does during interrupt handling). On chipsets where this
	  boot IRQ generation cannot be disabled, this workaround keeps
	  the original IRQ line masked so that only the equivalent "boot
	  IRQ" is delivered to the CPUs. The workaround also tells the
	  kernel to set up the IRQ handler on the boot IRQ line. In this
	  way only one interrupt is delivered to the kernel. Otherwise
	  the spurious second interrupt may cause the kernel to bring
	  down (vital) interrupt lines.

	  Only affects "broken" chipsets. Interrupt sharing may be
	  increased on these systems.

878
config X86_MCE
879
	bool "Machine Check / overheating reporting"
880
	default y
881
	---help---
882 883
	  Machine Check support allows the processor to notify the
	  kernel if it detects a problem (e.g. overheating, data corruption).
884
	  The action the kernel takes depends on the severity of the problem,
885
	  ranging from warning messages to halting the machine.
886

887
config X86_MCE_INTEL
888 889
	def_bool y
	prompt "Intel MCE features"
890
	depends on X86_MCE && X86_LOCAL_APIC
I
Ingo Molnar 已提交
891
	---help---
892 893 894 895
	   Additional support for intel specific MCE features such as
	   the thermal monitor.

config X86_MCE_AMD
896 897
	def_bool y
	prompt "AMD MCE features"
898
	depends on X86_MCE && X86_LOCAL_APIC
I
Ingo Molnar 已提交
899
	---help---
900 901 902
	   Additional support for AMD specific MCE features such as
	   the DRAM Error Threshold.

903
config X86_ANCIENT_MCE
J
Jan Beulich 已提交
904
	bool "Support for old Pentium 5 / WinChip machine checks"
905
	depends on X86_32 && X86_MCE
906 907 908 909
	---help---
	  Include support for machine check handling on old Pentium 5 or WinChip
	  systems. These typically need to be enabled explicitely on the command
	  line.
910

911 912
config X86_MCE_THRESHOLD
	depends on X86_MCE_AMD || X86_MCE_INTEL
J
Jan Beulich 已提交
913
	def_bool y
914

915
config X86_MCE_INJECT
916
	depends on X86_MCE
917 918 919 920 921 922
	tristate "Machine check injector support"
	---help---
	  Provide support for injecting machine checks for testing purposes.
	  If you don't know what a machine check is and you don't do kernel
	  QA it is safe to say n.

923 924
config X86_THERMAL_VECTOR
	def_bool y
925
	depends on X86_MCE_INTEL
926

927
config VM86
928
	bool "Enable VM86 support" if EXPERT
929 930
	default y
	depends on X86_32
I
Ingo Molnar 已提交
931 932
	---help---
	  This option is required by programs like DOSEMU to run 16-bit legacy
933
	  code on X86 processors. It also may be needed by software like
I
Ingo Molnar 已提交
934 935
	  XFree86 to initialize some video cards via BIOS. Disabling this
	  option saves about 6k.
936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954

config TOSHIBA
	tristate "Toshiba Laptop support"
	depends on X86_32
	---help---
	  This adds a driver to safely access the System Management Mode of
	  the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
	  not work on models with a Phoenix BIOS. The System Management Mode
	  is used to set the BIOS and power saving options on Toshiba portables.

	  For information on utilities to make use of this driver see the
	  Toshiba Linux utilities web site at:
	  <http://www.buzzard.org.uk/toshiba/>.

	  Say Y if you intend to run this kernel on a Toshiba portable.
	  Say N otherwise.

config I8K
	tristate "Dell laptop support"
955
	select HWMON
956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974
	---help---
	  This adds a driver to safely access the System Management Mode
	  of the CPU on the Dell Inspiron 8000. The System Management Mode
	  is used to read cpu temperature and cooling fan status and to
	  control the fans on the I8K portables.

	  This driver has been tested only on the Inspiron 8000 but it may
	  also work with other Dell laptops. You can force loading on other
	  models by passing the parameter `force=1' to the module. Use at
	  your own risk.

	  For information on utilities to make use of this driver see the
	  I8K Linux utilities web site at:
	  <http://people.debian.org/~dz/i8k/>

	  Say Y if you intend to run this kernel on a Dell Inspiron 8000.
	  Say N otherwise.

config X86_REBOOTFIXUPS
975 976
	bool "Enable X86 board specific fixups for reboot"
	depends on X86_32
977 978 979 980 981 982 983 984
	---help---
	  This enables chipset and/or board specific fixups to be done
	  in order to get reboot to work correctly. This is only needed on
	  some combinations of hardware and BIOS. The symptom, for which
	  this config is intended, is when reboot ends with a stalled/hung
	  system.

	  Currently, the only fixup is for the Geode machines using
985
	  CS5530A and CS5536 chipsets and the RDC R-321x SoC.
986 987 988 989 990 991

	  Say Y if you want to enable the fixup. Currently, it's safe to
	  enable this option even if you don't need it.
	  Say N otherwise.

config MICROCODE
992
	tristate "CPU microcode loading support"
993 994
	select FW_LOADER
	---help---
995

996
	  If you say Y here, you will be able to update the microcode on
997
	  certain Intel and AMD processors. The Intel support is for the
998 999 1000 1001
	  IA32 family, e.g. Pentium Pro, Pentium II, Pentium III, Pentium 4,
	  Xeon etc. The AMD support is for families 0x10 and later. You will
	  obviously need the actual microcode binary data itself which is not
	  shipped with the Linux kernel.
1002

P
Peter Oruba 已提交
1003 1004
	  This option selects the general module only, you need to select
	  at least one vendor specific module as well.
1005

1006 1007
	  To compile this driver as a module, choose M here: the module
	  will be called microcode.
1008

P
Peter Oruba 已提交
1009
config MICROCODE_INTEL
1010
	bool "Intel microcode loading support"
I
Ingo Molnar 已提交
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
	depends on MICROCODE
	default MICROCODE
	select FW_LOADER
	---help---
	  This options enables microcode patch loading support for Intel
	  processors.

	  For latest news and information on obtaining all the required
	  Intel ingredients for this driver, check:
	  <http://www.urbanmyth.org/microcode/>.
P
Peter Oruba 已提交
1021

1022
config MICROCODE_AMD
1023
	bool "AMD microcode loading support"
I
Ingo Molnar 已提交
1024 1025 1026 1027 1028
	depends on MICROCODE
	select FW_LOADER
	---help---
	  If you select this option, microcode patch loading support for AMD
	  processors will be enabled.
1029

I
Ingo Molnar 已提交
1030
config MICROCODE_OLD_INTERFACE
1031
	def_bool y
1032 1033 1034 1035
	depends on MICROCODE

config X86_MSR
	tristate "/dev/cpu/*/msr - Model-specific register support"
I
Ingo Molnar 已提交
1036
	---help---
1037 1038 1039 1040 1041 1042 1043 1044
	  This device gives privileged processes access to the x86
	  Model-Specific Registers (MSRs).  It is a character device with
	  major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
	  MSR accesses are directed to a specific CPU on multi-processor
	  systems.

config X86_CPUID
	tristate "/dev/cpu/*/cpuid - CPU information support"
I
Ingo Molnar 已提交
1045
	---help---
1046 1047 1048 1049 1050 1051 1052 1053
	  This device gives processes access to the x86 CPUID instruction to
	  be executed on a specific processor.  It is a character device
	  with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
	  /dev/cpu/31/cpuid.

choice
	prompt "High Memory Support"
	default HIGHMEM64G if X86_NUMAQ
J
Jan Beulich 已提交
1054
	default HIGHMEM4G
1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096
	depends on X86_32

config NOHIGHMEM
	bool "off"
	depends on !X86_NUMAQ
	---help---
	  Linux can use up to 64 Gigabytes of physical memory on x86 systems.
	  However, the address space of 32-bit x86 processors is only 4
	  Gigabytes large. That means that, if you have a large amount of
	  physical memory, not all of it can be "permanently mapped" by the
	  kernel. The physical memory that's not permanently mapped is called
	  "high memory".

	  If you are compiling a kernel which will never run on a machine with
	  more than 1 Gigabyte total physical RAM, answer "off" here (default
	  choice and suitable for most users). This will result in a "3GB/1GB"
	  split: 3GB are mapped so that each process sees a 3GB virtual memory
	  space and the remaining part of the 4GB virtual memory space is used
	  by the kernel to permanently map as much physical memory as
	  possible.

	  If the machine has between 1 and 4 Gigabytes physical RAM, then
	  answer "4GB" here.

	  If more than 4 Gigabytes is used then answer "64GB" here. This
	  selection turns Intel PAE (Physical Address Extension) mode on.
	  PAE implements 3-level paging on IA32 processors. PAE is fully
	  supported by Linux, PAE mode is implemented on all recent Intel
	  processors (Pentium Pro and better). NOTE: If you say "64GB" here,
	  then the kernel will not boot on CPUs that don't support PAE!

	  The actual amount of total physical memory will either be
	  auto detected or can be forced by using a kernel command line option
	  such as "mem=256M". (Try "man bootparam" or see the documentation of
	  your boot loader (lilo or loadlin) about how to pass options to the
	  kernel at boot time.)

	  If unsure, say "off".

config HIGHMEM4G
	bool "4GB"
	depends on !X86_NUMAQ
I
Ingo Molnar 已提交
1097
	---help---
1098 1099 1100 1101 1102
	  Select this if you have a 32-bit processor and between 1 and 4
	  gigabytes of physical RAM.

config HIGHMEM64G
	bool "64GB"
1103
	depends on !M486
1104
	select X86_PAE
I
Ingo Molnar 已提交
1105
	---help---
1106 1107 1108 1109 1110 1111 1112
	  Select this if you have a 32-bit processor and more than 4
	  gigabytes of physical RAM.

endchoice

choice
	depends on EXPERIMENTAL
1113
	prompt "Memory split" if EXPERT
1114 1115
	default VMSPLIT_3G
	depends on X86_32
I
Ingo Molnar 已提交
1116
	---help---
1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
	  Select the desired split between kernel and user memory.

	  If the address range available to the kernel is less than the
	  physical memory installed, the remaining memory will be available
	  as "high memory". Accessing high memory is a little more costly
	  than low memory, as it needs to be mapped into the kernel first.
	  Note that increasing the kernel address space limits the range
	  available to user programs, making the address space there
	  tighter.  Selecting anything other than the default 3G/1G split
	  will also likely make your kernel incompatible with binary-only
	  kernel modules.

	  If you are not absolutely sure what you are doing, leave this
	  option alone!

	config VMSPLIT_3G
		bool "3G/1G user/kernel split"
	config VMSPLIT_3G_OPT
		depends on !X86_PAE
		bool "3G/1G user/kernel split (for full 1G low memory)"
	config VMSPLIT_2G
		bool "2G/2G user/kernel split"
	config VMSPLIT_2G_OPT
		depends on !X86_PAE
		bool "2G/2G user/kernel split (for full 2G low memory)"
	config VMSPLIT_1G
		bool "1G/3G user/kernel split"
endchoice

config PAGE_OFFSET
	hex
	default 0xB0000000 if VMSPLIT_3G_OPT
	default 0x80000000 if VMSPLIT_2G
	default 0x78000000 if VMSPLIT_2G_OPT
	default 0x40000000 if VMSPLIT_1G
	default 0xC0000000
	depends on X86_32

config HIGHMEM
1156
	def_bool y
1157 1158 1159
	depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)

config X86_PAE
1160
	bool "PAE (Physical Address Extension) Support"
1161
	depends on X86_32 && !HIGHMEM4G
I
Ingo Molnar 已提交
1162
	---help---
1163 1164 1165 1166 1167
	  PAE is required for NX support, and furthermore enables
	  larger swapspace support for non-overcommit purposes. It
	  has the cost of more pagetable lookup overhead, and also
	  consumes more pagetable space per process.

1168
config ARCH_PHYS_ADDR_T_64BIT
1169 1170
	def_bool y
	depends on X86_64 || X86_PAE
1171

1172
config ARCH_DMA_ADDR_T_64BIT
1173 1174
	def_bool y
	depends on X86_64 || HIGHMEM64G
1175

1176
config DIRECT_GBPAGES
1177
	bool "Enable 1GB pages for kernel pagetables" if EXPERT
1178 1179
	default y
	depends on X86_64
I
Ingo Molnar 已提交
1180
	---help---
1181 1182 1183 1184
	  Allow the kernel linear mapping to use 1GB pages on CPUs that
	  support it. This can improve the kernel's performance a tiny bit by
	  reducing TLB pressure. If in doubt, say "Y".

1185 1186
# Common NUMA Features
config NUMA
1187
	bool "Numa Memory Allocation and Scheduler Support"
1188
	depends on SMP
1189
	depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
1190
	default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
I
Ingo Molnar 已提交
1191
	---help---
1192
	  Enable NUMA (Non Uniform Memory Access) support.
1193

1194 1195 1196 1197
	  The kernel will try to allocate memory used by a CPU on the
	  local memory controller of the CPU and add some more
	  NUMA awareness to the kernel.

1198
	  For 64-bit this is recommended if the system is Intel Core i7
1199 1200 1201 1202 1203 1204 1205
	  (or later), AMD Opteron, or EM64T NUMA.

	  For 32-bit this is only needed on (rare) 32-bit-only platforms
	  that support NUMA topologies, such as NUMAQ / Summit, or if you
	  boot a 32-bit kernel on a 64-bit NUMA platform.

	  Otherwise, you should say N.
1206 1207 1208 1209

comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
	depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)

1210
config AMD_NUMA
1211 1212
	def_bool y
	prompt "Old style AMD Opteron NUMA detection"
1213
	depends on X86_64 && NUMA && PCI
I
Ingo Molnar 已提交
1214
	---help---
1215 1216 1217 1218 1219
	  Enable AMD NUMA node topology detection.  You should say Y here if
	  you have a multi processor AMD system. This uses an old method to
	  read the NUMA configuration directly from the builtin Northbridge
	  of Opteron. It is recommended to use X86_64_ACPI_NUMA instead,
	  which also takes priority if both are compiled in.
1220 1221

config X86_64_ACPI_NUMA
1222 1223
	def_bool y
	prompt "ACPI NUMA detection"
1224 1225
	depends on X86_64 && NUMA && ACPI && PCI
	select ACPI_NUMA
I
Ingo Molnar 已提交
1226
	---help---
1227 1228
	  Enable ACPI SRAT based node topology detection.

1229 1230 1231 1232 1233 1234 1235 1236 1237
# Some NUMA nodes have memory ranges that span
# other nodes.  Even though a pfn is valid and
# between a node's start and end pfns, it may not
# reside on that node.  See memmap_init_zone()
# for details.
config NODES_SPAN_OTHER_NODES
	def_bool y
	depends on X86_64_ACPI_NUMA

1238 1239
config NUMA_EMU
	bool "NUMA emulation"
1240
	depends on NUMA
I
Ingo Molnar 已提交
1241
	---help---
1242 1243 1244 1245 1246
	  Enable NUMA emulation. A flat machine will be split
	  into virtual nodes when booted with "numa=fake=N", where N is the
	  number of nodes. This is only useful for debugging.

config NODES_SHIFT
1247
	int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
1248 1249
	range 1 10
	default "10" if MAXSMP
1250 1251 1252 1253
	default "6" if X86_64
	default "4" if X86_NUMAQ
	default "3"
	depends on NEED_MULTIPLE_NODES
I
Ingo Molnar 已提交
1254
	---help---
1255
	  Specify the maximum number of NUMA Nodes available on the target
1256
	  system.  Increases memory reserved to accommodate various tables.
1257

1258 1259 1260 1261
config HAVE_ARCH_ALLOC_REMAP
	def_bool y
	depends on X86_32 && NUMA

1262
config ARCH_HAVE_MEMORY_PRESENT
1263
	def_bool y
1264 1265 1266
	depends on X86_32 && DISCONTIGMEM

config NEED_NODE_MEMMAP_SIZE
1267
	def_bool y
1268 1269 1270 1271
	depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)

config ARCH_FLATMEM_ENABLE
	def_bool y
1272
	depends on X86_32 && !NUMA
1273 1274 1275

config ARCH_DISCONTIGMEM_ENABLE
	def_bool y
1276
	depends on NUMA && X86_32
1277 1278 1279

config ARCH_DISCONTIGMEM_DEFAULT
	def_bool y
1280 1281
	depends on NUMA && X86_32

1282 1283
config ARCH_SPARSEMEM_ENABLE
	def_bool y
1284
	depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD
1285 1286 1287
	select SPARSEMEM_STATIC if X86_32
	select SPARSEMEM_VMEMMAP_ENABLE if X86_64

1288 1289 1290 1291
config ARCH_SPARSEMEM_DEFAULT
	def_bool y
	depends on X86_64

1292 1293
config ARCH_SELECT_MEMORY_MODEL
	def_bool y
1294
	depends on ARCH_SPARSEMEM_ENABLE
1295 1296

config ARCH_MEMORY_PROBE
1297 1298
	def_bool y
	depends on X86_64 && MEMORY_HOTPLUG
1299

1300 1301 1302 1303
config ARCH_PROC_KCORE_TEXT
	def_bool y
	depends on X86_64 && PROC_KCORE

1304 1305 1306 1307 1308
config ILLEGAL_POINTER_VALUE
       hex
       default 0 if X86_32
       default 0xdead000000000000 if X86_64

1309 1310 1311 1312
source "mm/Kconfig"

config HIGHPTE
	bool "Allocate 3rd-level pagetables from highmem"
J
Jan Beulich 已提交
1313
	depends on HIGHMEM
I
Ingo Molnar 已提交
1314
	---help---
1315 1316 1317 1318 1319
	  The VM uses one page table entry for each page of physical memory.
	  For systems with a lot of RAM, this can be wasteful of precious
	  low memory.  Setting this option will put user-space page table
	  entries in high memory.

1320
config X86_CHECK_BIOS_CORRUPTION
I
Ingo Molnar 已提交
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
	bool "Check for low memory corruption"
	---help---
	  Periodically check for memory corruption in low memory, which
	  is suspected to be caused by BIOS.  Even when enabled in the
	  configuration, it is disabled at runtime.  Enable it by
	  setting "memory_corruption_check=1" on the kernel command
	  line.  By default it scans the low 64k of memory every 60
	  seconds; see the memory_corruption_check_size and
	  memory_corruption_check_period parameters in
	  Documentation/kernel-parameters.txt to adjust this.

	  When enabled with the default parameters, this option has
	  almost no overhead, as it reserves a relatively small amount
	  of memory and scans it infrequently.  It both detects corruption
	  and prevents it from affecting the running system.

	  It is, however, intended as a diagnostic tool; if repeatable
	  BIOS-originated corruption always affects the same memory,
	  you can use memmap= to prevent the kernel from using that
	  memory.
1341

1342
config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
I
Ingo Molnar 已提交
1343
	bool "Set the default setting of memory_corruption_check"
1344 1345
	depends on X86_CHECK_BIOS_CORRUPTION
	default y
I
Ingo Molnar 已提交
1346 1347 1348
	---help---
	  Set whether the default state of memory_corruption_check is
	  on or off.
1349

1350
config X86_RESERVE_LOW
1351 1352 1353
	int "Amount of low memory, in kilobytes, to reserve for the BIOS"
	default 64
	range 4 640
I
Ingo Molnar 已提交
1354
	---help---
1355 1356 1357 1358 1359 1360 1361 1362 1363
	  Specify the amount of low memory to reserve for the BIOS.

	  The first page contains BIOS data structures that the kernel
	  must not use, so that page must always be reserved.

	  By default we reserve the first 64K of physical RAM, as a
	  number of BIOSes are known to corrupt that memory range
	  during events such as suspend/resume or monitor cable
	  insertion, so it must not be used by the kernel.
I
Ingo Molnar 已提交
1364

1365 1366 1367 1368 1369
	  You can set this to 4 if you are absolutely sure that you
	  trust the BIOS to get all its memory reservations and usages
	  right.  If you know your BIOS have problems beyond the
	  default 64K area, you can set this to 640 to avoid using the
	  entire low memory range.
I
Ingo Molnar 已提交
1370

1371 1372 1373 1374 1375
	  If you have doubts about the BIOS (e.g. suspend/resume does
	  not work or there's kernel crashes after certain hardware
	  hotplug events) then you might want to enable
	  X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check
	  typical corruption patterns.
I
Ingo Molnar 已提交
1376

1377
	  Leave this to the default value of 64 if you are unsure.
I
Ingo Molnar 已提交
1378

1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405
config MATH_EMULATION
	bool
	prompt "Math emulation" if X86_32
	---help---
	  Linux can emulate a math coprocessor (used for floating point
	  operations) if you don't have one. 486DX and Pentium processors have
	  a math coprocessor built in, 486SX and 386 do not, unless you added
	  a 487DX or 387, respectively. (The messages during boot time can
	  give you some hints here ["man dmesg"].) Everyone needs either a
	  coprocessor or this emulation.

	  If you don't have a math coprocessor, you need to say Y here; if you
	  say Y here even though you have a coprocessor, the coprocessor will
	  be used nevertheless. (This behavior can be changed with the kernel
	  command line option "no387", which comes handy if your coprocessor
	  is broken. Try "man bootparam" or see the documentation of your boot
	  loader (lilo or loadlin) about how to pass options to the kernel at
	  boot time.) This means that it is a good idea to say Y here if you
	  intend to use this kernel on different machines.

	  More information about the internals of the Linux math coprocessor
	  emulation can be found in <file:arch/x86/math-emu/README>.

	  If you are not sure, say Y; apart from resulting in a 66 KB bigger
	  kernel, it won't hurt.

config MTRR
J
Jan Beulich 已提交
1406
	def_bool y
1407
	prompt "MTRR (Memory Type Range Register) support" if EXPERT
1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437
	---help---
	  On Intel P6 family processors (Pentium Pro, Pentium II and later)
	  the Memory Type Range Registers (MTRRs) may be used to control
	  processor access to memory ranges. This is most useful if you have
	  a video (VGA) card on a PCI or AGP bus. Enabling write-combining
	  allows bus write transfers to be combined into a larger transfer
	  before bursting over the PCI/AGP bus. This can increase performance
	  of image write operations 2.5 times or more. Saying Y here creates a
	  /proc/mtrr file which may be used to manipulate your processor's
	  MTRRs. Typically the X server should use this.

	  This code has a reasonably generic interface so that similar
	  control registers on other processors can be easily supported
	  as well:

	  The Cyrix 6x86, 6x86MX and M II processors have Address Range
	  Registers (ARRs) which provide a similar functionality to MTRRs. For
	  these, the ARRs are used to emulate the MTRRs.
	  The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
	  MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
	  write-combining. All of these processors are supported by this code
	  and it makes sense to say Y here if you have one of them.

	  Saying Y here also fixes a problem with buggy SMP BIOSes which only
	  set the MTRRs for the boot CPU and not for the secondary CPUs. This
	  can lead to all sorts of problems, so it's good to say Y here.

	  You can safely say Y even if your machine doesn't have MTRRs, you'll
	  just add about 9 KB to your kernel.

1438
	  See <file:Documentation/x86/mtrr.txt> for more information.
1439

1440
config MTRR_SANITIZER
1441
	def_bool y
1442 1443
	prompt "MTRR cleanup support"
	depends on MTRR
I
Ingo Molnar 已提交
1444
	---help---
T
Thomas Gleixner 已提交
1445 1446
	  Convert MTRR layout from continuous to discrete, so X drivers can
	  add writeback entries.
1447

T
Thomas Gleixner 已提交
1448
	  Can be disabled with disable_mtrr_cleanup on the kernel command line.
1449
	  The largest mtrr entry size for a continuous block can be set with
T
Thomas Gleixner 已提交
1450
	  mtrr_chunk_size.
1451

1452
	  If unsure, say Y.
1453 1454

config MTRR_SANITIZER_ENABLE_DEFAULT
1455 1456 1457
	int "MTRR cleanup enable value (0-1)"
	range 0 1
	default "0"
1458
	depends on MTRR_SANITIZER
I
Ingo Molnar 已提交
1459
	---help---
1460
	  Enable mtrr cleanup default value
1461

1462 1463 1464 1465 1466
config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
	int "MTRR cleanup spare reg num (0-7)"
	range 0 7
	default "1"
	depends on MTRR_SANITIZER
I
Ingo Molnar 已提交
1467
	---help---
1468
	  mtrr cleanup spare entries default, it can be changed via
T
Thomas Gleixner 已提交
1469
	  mtrr_spare_reg_nr=N on the kernel command line.
1470

1471
config X86_PAT
J
Jan Beulich 已提交
1472
	def_bool y
1473
	prompt "x86 PAT support" if EXPERT
1474
	depends on MTRR
I
Ingo Molnar 已提交
1475
	---help---
1476
	  Use PAT attributes to setup page level cache control.
1477

1478 1479 1480 1481
	  PATs are the modern equivalents of MTRRs and are much more
	  flexible than MTRRs.

	  Say N here if you see bootup problems (boot crash, boot hang,
1482
	  spontaneous reboots) or a non-working video driver.
1483 1484 1485

	  If unsure, say Y.

1486 1487 1488 1489
config ARCH_USES_PG_UNCACHED
	def_bool y
	depends on X86_PAT

1490 1491 1492 1493 1494 1495 1496 1497 1498
config ARCH_RANDOM
	def_bool y
	prompt "x86 architectural random number generator" if EXPERT
	---help---
	  Enable the x86 architectural RDRAND instruction
	  (Intel Bull Mountain technology) to generate random numbers.
	  If supported, this is a high bandwidth, cryptographically
	  secure hardware random number generator.

1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509
config X86_SMAP
	def_bool y
	prompt "Supervisor Mode Access Prevention" if EXPERT
	---help---
	  Supervisor Mode Access Prevention (SMAP) is a security
	  feature in newer Intel processors.  There is a small
	  performance cost if this enabled and turned on; there is
	  also a small increase in the kernel size if this is enabled.

	  If unsure, say Y.

1510
config EFI
1511
	bool "EFI runtime service support"
H
Huang, Ying 已提交
1512
	depends on ACPI
1513
	---help---
I
Ingo Molnar 已提交
1514 1515
	  This enables the kernel to use EFI runtime services that are
	  available (such as the EFI variable services).
1516

I
Ingo Molnar 已提交
1517 1518 1519 1520 1521 1522
	  This option is only useful on systems that have EFI firmware.
	  In addition, you should use the latest ELILO loader available
	  at <http://elilo.sourceforge.net> in order to take advantage
	  of EFI runtime services. However, even with this option, the
	  resultant kernel should continue to boot on existing non-EFI
	  platforms.
1523

M
Matt Fleming 已提交
1524 1525 1526 1527 1528 1529 1530
config EFI_STUB
       bool "EFI stub support"
       depends on EFI
       ---help---
          This kernel feature allows a bzImage to be loaded directly
	  by EFI firmware without the use of a bootloader.

1531 1532
	  See Documentation/x86/efi-stub.txt for more information.

1533
config SECCOMP
1534 1535
	def_bool y
	prompt "Enable seccomp to safely compute untrusted bytecode"
I
Ingo Molnar 已提交
1536
	---help---
1537 1538 1539 1540 1541 1542
	  This kernel feature is useful for number crunching applications
	  that may need to compute untrusted bytecode during their
	  execution. By using pipes or other transports made available to
	  the process as file descriptors supporting the read/write
	  syscalls, it's possible to isolate those applications in
	  their own address space using seccomp. Once seccomp is
1543
	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1544 1545 1546 1547 1548 1549
	  and the task is only allowed to execute a few safe syscalls
	  defined by each seccomp mode.

	  If unsure, say Y. Only embedded should say N here.

config CC_STACKPROTECTOR
1550
	bool "Enable -fstack-protector buffer overflow detection"
I
Ingo Molnar 已提交
1551 1552
	---help---
	  This option turns on the -fstack-protector GCC feature. This
I
Ingo Molnar 已提交
1553 1554
	  feature puts, at the beginning of functions, a canary value on
	  the stack just before the return address, and validates
1555 1556 1557 1558 1559 1560 1561
	  the value just before actually returning.  Stack based buffer
	  overflows (that need to overwrite this return address) now also
	  overwrite the canary, which gets detected and the attack is then
	  neutralized via a kernel panic.

	  This feature requires gcc version 4.2 or above, or a distribution
	  gcc with the feature backported. Older versions are automatically
I
Ingo Molnar 已提交
1562 1563
	  detected and for those versions, this configuration option is
	  ignored. (and a warning is printed during bootup)
1564 1565 1566 1567 1568

source kernel/Kconfig.hz

config KEXEC
	bool "kexec system call"
I
Ingo Molnar 已提交
1569
	---help---
1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583
	  kexec is a system call that implements the ability to shutdown your
	  current kernel, and to start another kernel.  It is like a reboot
	  but it is independent of the system firmware.   And like a reboot
	  you can start any kernel with it, not just Linux.

	  The name comes from the similarity to the exec system call.

	  It is an ongoing process to be certain the hardware in a machine
	  is properly shutdown, so do not be surprised if this code does not
	  initially work for you.  It may help to enable device hotplugging
	  support.  As of this writing the exact hardware interface is
	  strongly in flux, so no good recommendation can be made.

config CRASH_DUMP
1584
	bool "kernel crash dumps"
1585
	depends on X86_64 || (X86_32 && HIGHMEM)
I
Ingo Molnar 已提交
1586
	---help---
1587 1588 1589 1590 1591 1592 1593 1594 1595 1596
	  Generate crash dump after being started by kexec.
	  This should be normally only set in special crash dump kernels
	  which are loaded in the main kernel with kexec-tools into
	  a specially reserved region and then later executed after
	  a crash by kdump/kexec. The crash dump kernel must be compiled
	  to a memory address not used by the main kernel or BIOS using
	  PHYSICAL_START, or it must be built as a relocatable image
	  (CONFIG_RELOCATABLE=y).
	  For more details see Documentation/kdump/kdump.txt

H
Huang Ying 已提交
1597 1598 1599
config KEXEC_JUMP
	bool "kexec jump (EXPERIMENTAL)"
	depends on EXPERIMENTAL
1600
	depends on KEXEC && HIBERNATION
I
Ingo Molnar 已提交
1601
	---help---
1602 1603
	  Jump between original kernel and kexeced kernel and invoke
	  code in physical address mode via KEXEC
H
Huang Ying 已提交
1604

1605
config PHYSICAL_START
1606
	hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
1607
	default "0x1000000"
I
Ingo Molnar 已提交
1608
	---help---
1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625
	  This gives the physical address where the kernel is loaded.

	  If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
	  bzImage will decompress itself to above physical address and
	  run from there. Otherwise, bzImage will run from the address where
	  it has been loaded by the boot loader and will ignore above physical
	  address.

	  In normal kdump cases one does not have to set/change this option
	  as now bzImage can be compiled as a completely relocatable image
	  (CONFIG_RELOCATABLE=y) and be used to load and run from a different
	  address. This option is mainly useful for the folks who don't want
	  to use a bzImage for capturing the crash dump and want to use a
	  vmlinux instead. vmlinux is not relocatable hence a kernel needs
	  to be specifically compiled to run from a specific memory area
	  (normally a reserved region) and this option comes handy.

1626 1627 1628 1629 1630 1631 1632 1633 1634
	  So if you are using bzImage for capturing the crash dump,
	  leave the value here unchanged to 0x1000000 and set
	  CONFIG_RELOCATABLE=y.  Otherwise if you plan to use vmlinux
	  for capturing the crash dump change this value to start of
	  the reserved region.  In other words, it can be set based on
	  the "X" value as specified in the "crashkernel=YM@XM"
	  command line boot parameter passed to the panic-ed
	  kernel. Please take a look at Documentation/kdump/kdump.txt
	  for more details about crash dumps.
1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646

	  Usage of bzImage for capturing the crash dump is recommended as
	  one does not have to build two kernels. Same kernel can be used
	  as production kernel and capture kernel. Above option should have
	  gone away after relocatable bzImage support is introduced. But it
	  is present because there are users out there who continue to use
	  vmlinux for dump capture. This option should go away down the
	  line.

	  Don't change this unless you know what you are doing.

config RELOCATABLE
1647 1648
	bool "Build a relocatable kernel"
	default y
I
Ingo Molnar 已提交
1649
	---help---
1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662
	  This builds a kernel image that retains relocation information
	  so it can be loaded someplace besides the default 1MB.
	  The relocations tend to make the kernel binary about 10% larger,
	  but are discarded at runtime.

	  One use is for the kexec on panic case where the recovery kernel
	  must live at a different physical address than the primary
	  kernel.

	  Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
	  it has been loaded at and the compile time physical address
	  (CONFIG_PHYSICAL_START) is ignored.

1663 1664 1665 1666 1667
# Relocation on x86-32 needs some additional build support
config X86_NEED_RELOCS
	def_bool y
	depends on X86_32 && RELOCATABLE

1668
config PHYSICAL_ALIGN
J
Jan Beulich 已提交
1669
	hex "Alignment value to which kernel should be aligned" if X86_32
1670 1671
	default "0x1000000"
	range 0x2000 0x1000000
I
Ingo Molnar 已提交
1672
	---help---
1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691
	  This value puts the alignment restrictions on physical address
	  where kernel is loaded and run from. Kernel is compiled for an
	  address which meets above alignment restriction.

	  If bootloader loads the kernel at a non-aligned address and
	  CONFIG_RELOCATABLE is set, kernel will move itself to nearest
	  address aligned to above value and run from there.

	  If bootloader loads the kernel at a non-aligned address and
	  CONFIG_RELOCATABLE is not set, kernel will ignore the run time
	  load address and decompress itself to the address it has been
	  compiled for and run from there. The address for which kernel is
	  compiled already meets above alignment restrictions. Hence the
	  end result is that kernel runs from a physical address meeting
	  above alignment restrictions.

	  Don't change this unless you know what you are doing.

config HOTPLUG_CPU
1692
	bool "Support for hot-pluggable CPUs"
1693
	depends on SMP && HOTPLUG
1694
	---help---
1695 1696 1697 1698 1699
	  Say Y here to allow turning CPUs off and on. CPUs can be
	  controlled through /sys/devices/system/cpu.
	  ( Note: power management support will enable this option
	    automatically on SMP systems. )
	  Say N if you want to disable CPU hotplug.
1700

1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729
config BOOTPARAM_HOTPLUG_CPU0
	bool "Set default setting of cpu0_hotpluggable"
	default n
	depends on HOTPLUG_CPU && EXPERIMENTAL
	---help---
	  Set whether default state of cpu0_hotpluggable is on or off.

	  Say Y here to enable CPU0 hotplug by default. If this switch
	  is turned on, there is no need to give cpu0_hotplug kernel
	  parameter and the CPU0 hotplug feature is enabled by default.

	  Please note: there are two known CPU0 dependencies if you want
	  to enable the CPU0 hotplug feature either by this switch or by
	  cpu0_hotplug kernel parameter.

	  First, resume from hibernate or suspend always starts from CPU0.
	  So hibernate and suspend are prevented if CPU0 is offline.

	  Second dependency is PIC interrupts always go to CPU0. CPU0 can not
	  offline if any interrupt can not migrate out of CPU0. There may
	  be other CPU0 dependencies.

	  Please make sure the dependencies are under your control before
	  you enable this feature.

	  Say N if you don't want to enable CPU0 hotplug feature by default.
	  You still can enable the CPU0 hotplug feature at boot by kernel
	  parameter cpu0_hotplug.

F
Fenghua Yu 已提交
1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744
config DEBUG_HOTPLUG_CPU0
	def_bool n
	prompt "Debug CPU0 hotplug"
	depends on HOTPLUG_CPU && EXPERIMENTAL
	---help---
	  Enabling this option offlines CPU0 (if CPU0 can be offlined) as
	  soon as possible and boots up userspace with CPU0 offlined. User
	  can online CPU0 back after boot time.

	  To debug CPU0 hotplug, you need to enable CPU0 offline/online
	  feature by either turning on CONFIG_BOOTPARAM_HOTPLUG_CPU0 during
	  compilation or giving cpu0_hotplug kernel parameter at boot.

	  If unsure, say N.

1745
config COMPAT_VDSO
1746 1747
	def_bool y
	prompt "Compat VDSO support"
R
Roland McGrath 已提交
1748
	depends on X86_32 || IA32_EMULATION
I
Ingo Molnar 已提交
1749
	---help---
R
Roland McGrath 已提交
1750
	  Map the 32-bit VDSO to the predictable old-style address too.
R
Randy Dunlap 已提交
1751

1752 1753 1754 1755 1756 1757
	  Say N here if you are running a sufficiently recent glibc
	  version (2.3.3 or later), to remove the high-mapped
	  VDSO mapping and to exclusively use the randomized VDSO.

	  If unsure, say Y.

1758 1759
config CMDLINE_BOOL
	bool "Built-in kernel command line"
I
Ingo Molnar 已提交
1760
	---help---
1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777
	  Allow for specifying boot arguments to the kernel at
	  build time.  On some systems (e.g. embedded ones), it is
	  necessary or convenient to provide some or all of the
	  kernel boot arguments with the kernel itself (that is,
	  to not rely on the boot loader to provide them.)

	  To compile command line arguments into the kernel,
	  set this option to 'Y', then fill in the
	  the boot arguments in CONFIG_CMDLINE.

	  Systems with fully functional boot loaders (i.e. non-embedded)
	  should leave this option set to 'N'.

config CMDLINE
	string "Built-in kernel command string"
	depends on CMDLINE_BOOL
	default ""
I
Ingo Molnar 已提交
1778
	---help---
1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793
	  Enter arguments here that should be compiled into the kernel
	  image and used at boot time.  If the boot loader provides a
	  command line at boot time, it is appended to this string to
	  form the full kernel command line, when the system boots.

	  However, you can use the CONFIG_CMDLINE_OVERRIDE option to
	  change this behavior.

	  In most cases, the command line (whether built-in or provided
	  by the boot loader) should specify the device for the root
	  file system.

config CMDLINE_OVERRIDE
	bool "Built-in command line overrides boot loader arguments"
	depends on CMDLINE_BOOL
I
Ingo Molnar 已提交
1794
	---help---
1795 1796 1797 1798 1799 1800
	  Set this option to 'Y' to have the kernel ignore the boot loader
	  command line, and use ONLY the built-in command line.

	  This is used to work around broken boot loaders.  This should
	  be set to 'N' under normal conditions.

1801 1802 1803 1804 1805 1806
endmenu

config ARCH_ENABLE_MEMORY_HOTPLUG
	def_bool y
	depends on X86_64 || (X86_32 && HIGHMEM)

1807 1808 1809 1810
config ARCH_ENABLE_MEMORY_HOTREMOVE
	def_bool y
	depends on MEMORY_HOTPLUG

1811
config USE_PERCPU_NUMA_NODE_ID
1812
	def_bool y
1813 1814
	depends on NUMA

1815
menu "Power management and ACPI options"
1816 1817

config ARCH_HIBERNATION_HEADER
1818
	def_bool y
1819 1820 1821 1822 1823 1824
	depends on X86_64 && HIBERNATION

source "kernel/power/Kconfig"

source "drivers/acpi/Kconfig"

F
Feng Tang 已提交
1825 1826
source "drivers/sfi/Kconfig"

1827
config X86_APM_BOOT
J
Jan Beulich 已提交
1828
	def_bool y
1829
	depends on APM
1830

1831 1832
menuconfig APM
	tristate "APM (Advanced Power Management) BIOS support"
1833
	depends on X86_32 && PM_SLEEP
1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
	---help---
	  APM is a BIOS specification for saving power using several different
	  techniques. This is mostly useful for battery powered laptops with
	  APM compliant BIOSes. If you say Y here, the system time will be
	  reset after a RESUME operation, the /proc/apm device will provide
	  battery status information, and user-space programs will receive
	  notification of APM "events" (e.g. battery status change).

	  If you select "Y" here, you can disable actual use of the APM
	  BIOS by passing the "apm=off" option to the kernel at boot time.

	  Note that the APM support is almost completely disabled for
	  machines with more than one CPU.

	  In order to use APM, you will need supporting software. For location
1849 1850
	  and more information, read <file:Documentation/power/apm-acpi.txt>
	  and the Battery Powered Linux mini-HOWTO, available from
1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893
	  <http://www.tldp.org/docs.html#howto>.

	  This driver does not spin down disk drives (see the hdparm(8)
	  manpage ("man 8 hdparm") for that), and it doesn't turn off
	  VESA-compliant "green" monitors.

	  This driver does not support the TI 4000M TravelMate and the ACER
	  486/DX4/75 because they don't have compliant BIOSes. Many "green"
	  desktop machines also don't have compliant BIOSes, and this driver
	  may cause those machines to panic during the boot phase.

	  Generally, if you don't have a battery in your machine, there isn't
	  much point in using this driver and you should say N. If you get
	  random kernel OOPSes or reboots that don't seem to be related to
	  anything, try disabling/enabling this option (or disabling/enabling
	  APM in your BIOS).

	  Some other things you should try when experiencing seemingly random,
	  "weird" problems:

	  1) make sure that you have enough swap space and that it is
	  enabled.
	  2) pass the "no-hlt" option to the kernel
	  3) switch on floating point emulation in the kernel and pass
	  the "no387" option to the kernel
	  4) pass the "floppy=nodma" option to the kernel
	  5) pass the "mem=4M" option to the kernel (thereby disabling
	  all but the first 4 MB of RAM)
	  6) make sure that the CPU is not over clocked.
	  7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
	  8) disable the cache from your BIOS settings
	  9) install a fan for the video card or exchange video RAM
	  10) install a better fan for the CPU
	  11) exchange RAM chips
	  12) exchange the motherboard.

	  To compile this driver as a module, choose M here: the
	  module will be called apm.

if APM

config APM_IGNORE_USER_SUSPEND
	bool "Ignore USER SUSPEND"
I
Ingo Molnar 已提交
1894
	---help---
1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917
	  This option will ignore USER SUSPEND requests. On machines with a
	  compliant APM BIOS, you want to say N. However, on the NEC Versa M
	  series notebooks, it is necessary to say Y because of a BIOS bug.

config APM_DO_ENABLE
	bool "Enable PM at boot time"
	---help---
	  Enable APM features at boot time. From page 36 of the APM BIOS
	  specification: "When disabled, the APM BIOS does not automatically
	  power manage devices, enter the Standby State, enter the Suspend
	  State, or take power saving steps in response to CPU Idle calls."
	  This driver will make CPU Idle calls when Linux is idle (unless this
	  feature is turned off -- see "Do CPU IDLE calls", below). This
	  should always save battery power, but more complicated APM features
	  will be dependent on your BIOS implementation. You may need to turn
	  this option off if your computer hangs at boot time when using APM
	  support, or if it beeps continuously instead of suspending. Turn
	  this off if you have a NEC UltraLite Versa 33/C or a Toshiba
	  T400CDT. This is off by default since most machines do fine without
	  this feature.

config APM_CPU_IDLE
	bool "Make CPU Idle calls when idle"
I
Ingo Molnar 已提交
1918
	---help---
1919 1920 1921 1922 1923 1924 1925 1926 1927 1928
	  Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
	  On some machines, this can activate improved power savings, such as
	  a slowed CPU clock rate, when the machine is idle. These idle calls
	  are made after the idle loop has run for some length of time (e.g.,
	  333 mS). On some machines, this will cause a hang at boot time or
	  whenever the CPU becomes idle. (On machines with more than one CPU,
	  this option does nothing.)

config APM_DISPLAY_BLANK
	bool "Enable console blanking using APM"
I
Ingo Molnar 已提交
1929
	---help---
1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941
	  Enable console blanking using the APM. Some laptops can use this to
	  turn off the LCD backlight when the screen blanker of the Linux
	  virtual console blanks the screen. Note that this is only used by
	  the virtual console screen blanker, and won't turn off the backlight
	  when using the X Window system. This also doesn't have anything to
	  do with your VESA-compliant power-saving monitor. Further, this
	  option doesn't work for all laptops -- it might not turn off your
	  backlight at all, or it might print a lot of errors to the console,
	  especially if you are using gpm.

config APM_ALLOW_INTS
	bool "Allow interrupts during APM BIOS calls"
I
Ingo Molnar 已提交
1942
	---help---
1943 1944 1945 1946 1947 1948 1949 1950 1951
	  Normally we disable external interrupts while we are making calls to
	  the APM BIOS as a measure to lessen the effects of a badly behaving
	  BIOS implementation.  The BIOS should reenable interrupts if it
	  needs to.  Unfortunately, some BIOSes do not -- especially those in
	  many of the newer IBM Thinkpads.  If you experience hangs when you
	  suspend, try setting this to Y.  Otherwise, say N.

endif # APM

1952
source "drivers/cpufreq/Kconfig"
1953 1954 1955

source "drivers/cpuidle/Kconfig"

A
Andy Henroid 已提交
1956 1957
source "drivers/idle/Kconfig"

1958 1959 1960 1961 1962 1963
endmenu


menu "Bus options (PCI etc.)"

config PCI
I
Ingo Molnar 已提交
1964
	bool "PCI support"
A
Adrian Bunk 已提交
1965
	default y
1966
	select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
I
Ingo Molnar 已提交
1967
	---help---
1968 1969 1970 1971 1972 1973 1974
	  Find out whether you have a PCI motherboard. PCI is the name of a
	  bus system, i.e. the way the CPU talks to the other stuff inside
	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
	  VESA. If you have PCI, say Y, otherwise N.

choice
	prompt "PCI access mode"
1975
	depends on X86_32 && PCI
1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000
	default PCI_GOANY
	---help---
	  On PCI systems, the BIOS can be used to detect the PCI devices and
	  determine their configuration. However, some old PCI motherboards
	  have BIOS bugs and may crash if this is done. Also, some embedded
	  PCI-based systems don't have any BIOS at all. Linux can also try to
	  detect the PCI hardware directly without using the BIOS.

	  With this option, you can specify how Linux should detect the
	  PCI devices. If you choose "BIOS", the BIOS will be used,
	  if you choose "Direct", the BIOS won't be used, and if you
	  choose "MMConfig", then PCI Express MMCONFIG will be used.
	  If you choose "Any", the kernel will try MMCONFIG, then the
	  direct access method and falls back to the BIOS if that doesn't
	  work. If unsure, go with the default, which is "Any".

config PCI_GOBIOS
	bool "BIOS"

config PCI_GOMMCONFIG
	bool "MMConfig"

config PCI_GODIRECT
	bool "Direct"

2001
config PCI_GOOLPC
2002
	bool "OLPC XO-1"
2003 2004
	depends on OLPC

2005 2006 2007
config PCI_GOANY
	bool "Any"

2008 2009 2010
endchoice

config PCI_BIOS
2011
	def_bool y
2012
	depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
2013 2014 2015

# x86-64 doesn't support PCI BIOS access from long mode so always go direct.
config PCI_DIRECT
2016
	def_bool y
2017
	depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG))
2018 2019

config PCI_MMCONFIG
2020
	def_bool y
F
Feng Tang 已提交
2021
	depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY)
2022

2023
config PCI_OLPC
2024 2025
	def_bool y
	depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
2026

2027 2028 2029 2030 2031
config PCI_XEN
	def_bool y
	depends on PCI && XEN
	select SWIOTLB_XEN

2032
config PCI_DOMAINS
2033
	def_bool y
2034 2035 2036 2037 2038 2039
	depends on PCI

config PCI_MMCONFIG
	bool "Support mmconfig PCI config space access"
	depends on X86_64 && PCI && ACPI

2040
config PCI_CNB20LE_QUIRK
2041
	bool "Read CNB20LE Host Bridge Windows" if EXPERT
2042
	depends on PCI && EXPERIMENTAL
2043 2044 2045 2046 2047
	help
	  Read the PCI windows out of the CNB20LE host bridge. This allows
	  PCI hotplug to work on systems with the CNB20LE chipset which do
	  not have ACPI.

2048 2049 2050 2051 2052
	  There's no public spec for this chipset, and this functionality
	  is known to be incomplete.

	  You should say N unless you know you need this.

2053 2054 2055 2056
source "drivers/pci/pcie/Kconfig"

source "drivers/pci/Kconfig"

2057
# x86_64 have no ISA slots, but can have ISA-style DMA.
2058
config ISA_DMA_API
2059 2060 2061 2062 2063
	bool "ISA-style DMA support" if (X86_64 && EXPERT)
	default y
	help
	  Enables ISA-style DMA support for devices requiring such controllers.
	  If unsure, say Y.
2064 2065 2066 2067 2068

if X86_32

config ISA
	bool "ISA support"
I
Ingo Molnar 已提交
2069
	---help---
2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095
	  Find out whether you have ISA slots on your motherboard.  ISA is the
	  name of a bus system, i.e. the way the CPU talks to the other stuff
	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
	  newer boards don't support it.  If you have ISA, say Y, otherwise N.

config EISA
	bool "EISA support"
	depends on ISA
	---help---
	  The Extended Industry Standard Architecture (EISA) bus was
	  developed as an open alternative to the IBM MicroChannel bus.

	  The EISA bus provided some of the features of the IBM MicroChannel
	  bus while maintaining backward compatibility with cards made for
	  the older ISA bus.  The EISA bus saw limited use between 1988 and
	  1995 when it was made obsolete by the PCI bus.

	  Say Y here if you are building a kernel for an EISA-based machine.

	  Otherwise, say N.

source "drivers/eisa/Kconfig"

config SCx200
	tristate "NatSemi SCx200 support"
I
Ingo Molnar 已提交
2096
	---help---
2097 2098 2099 2100 2101 2102 2103 2104 2105
	  This provides basic support for National Semiconductor's
	  (now AMD's) Geode processors.  The driver probes for the
	  PCI-IDs of several on-chip devices, so its a good dependency
	  for other scx200_* drivers.

	  If compiled as a module, the driver is named scx200.

config SCx200HR_TIMER
	tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
J
John Stultz 已提交
2106
	depends on SCx200
2107
	default y
I
Ingo Molnar 已提交
2108
	---help---
2109 2110 2111 2112 2113 2114
	  This driver provides a clocksource built upon the on-chip
	  27MHz high-resolution timer.  Its also a workaround for
	  NSC Geode SC-1100's buggy TSC, which loses time when the
	  processor goes idle (as is done by the scheduler).  The
	  other workaround is idle=poll boot option.

2115 2116
config OLPC
	bool "One Laptop Per Child support"
2117
	depends on !X86_PAE
2118
	select GPIOLIB
2119
	select OF
2120
	select OF_PROMTREE
2121
	select IRQ_DOMAIN
I
Ingo Molnar 已提交
2122
	---help---
2123 2124 2125
	  Add support for detecting the unique features of the OLPC
	  XO hardware.

2126 2127
config OLPC_XO1_PM
	bool "OLPC XO-1 Power Management"
2128
	depends on OLPC && MFD_CS5535 && PM_SLEEP
2129
	select MFD_CORE
2130
	---help---
2131
	  Add support for poweroff and suspend of the OLPC XO-1 laptop.
2132

D
Daniel Drake 已提交
2133 2134 2135 2136 2137 2138 2139
config OLPC_XO1_RTC
	bool "OLPC XO-1 Real Time Clock"
	depends on OLPC_XO1_PM && RTC_DRV_CMOS
	---help---
	  Add support for the XO-1 real time clock, which can be used as a
	  programmable wakeup source.

2140 2141
config OLPC_XO1_SCI
	bool "OLPC XO-1 SCI extras"
2142 2143
	depends on OLPC && OLPC_XO1_PM
	select POWER_SUPPLY
2144 2145 2146 2147
	select GPIO_CS5535
	select MFD_CORE
	---help---
	  Add support for SCI-based features of the OLPC XO-1 laptop:
2148
	   - EC-driven system wakeups
2149
	   - Power button
2150
	   - Ebook switch
2151
	   - Lid switch
2152 2153
	   - AC adapter status updates
	   - Battery status updates
2154

D
Daniel Drake 已提交
2155 2156
config OLPC_XO15_SCI
	bool "OLPC XO-1.5 SCI extras"
2157 2158
	depends on OLPC && ACPI
	select POWER_SUPPLY
D
Daniel Drake 已提交
2159 2160 2161 2162 2163
	---help---
	  Add support for SCI-based features of the OLPC XO-1.5 laptop:
	   - EC-driven system wakeups
	   - AC adapter status updates
	   - Battery status updates
2164

2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178
config ALIX
	bool "PCEngines ALIX System Support (LED setup)"
	select GPIOLIB
	---help---
	  This option enables system support for the PCEngines ALIX.
	  At present this just sets up LEDs for GPIO control on
	  ALIX2/3/6 boards.  However, other system specific setup should
	  get added here.

	  Note: You must still enable the drivers for GPIO and LED support
	  (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs

	  Note: You have to set alix.force=1 for boards with Award BIOS.

2179 2180 2181 2182 2183 2184
config NET5501
	bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)"
	select GPIOLIB
	---help---
	  This option enables system support for the Soekris Engineering net5501.

2185 2186 2187 2188 2189 2190 2191
config GEOS
	bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)"
	select GPIOLIB
	depends on DMI
	---help---
	  This option enables system support for the Traverse Technologies GEOS.

2192 2193
endif # X86_32

2194
config AMD_NB
2195
	def_bool y
2196
	depends on CPU_SUP_AMD && PCI
2197 2198 2199 2200 2201

source "drivers/pcmcia/Kconfig"

source "drivers/pci/hotplug/Kconfig"

2202 2203 2204 2205 2206 2207 2208 2209 2210 2211
config RAPIDIO
	bool "RapidIO support"
	depends on PCI
	default n
	help
	  If you say Y here, the kernel will include drivers and
	  infrastructure code to support RapidIO interconnect devices.

source "drivers/rapidio/Kconfig"

2212 2213 2214 2215 2216 2217 2218 2219 2220 2221
endmenu


menu "Executable file formats / Emulations"

source "fs/Kconfig.binfmt"

config IA32_EMULATION
	bool "IA32 Emulation"
	depends on X86_64
R
Roland McGrath 已提交
2222
	select COMPAT_BINFMT_ELF
2223
	select HAVE_UID16
I
Ingo Molnar 已提交
2224
	---help---
H
H. J. Lu 已提交
2225 2226 2227
	  Include code to run legacy 32-bit programs under a
	  64-bit kernel. You should likely turn this on, unless you're
	  100% sure that you don't have any 32-bit programs left.
2228 2229

config IA32_AOUT
I
Ingo Molnar 已提交
2230 2231 2232 2233
	tristate "IA32 a.out support"
	depends on IA32_EMULATION
	---help---
	  Support old a.out binaries in the 32bit emulation.
2234

2235
config X86_X32
H
H. J. Lu 已提交
2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247
	bool "x32 ABI for 64-bit mode (EXPERIMENTAL)"
	depends on X86_64 && IA32_EMULATION && EXPERIMENTAL
	---help---
	  Include code to run binaries for the x32 native 32-bit ABI
	  for 64-bit processors.  An x32 process gets access to the
	  full 64-bit register file and wide data path while leaving
	  pointers at 32 bits for smaller memory footprint.

	  You will need a recent binutils (2.22 or later) with
	  elf32_x86_64 support enabled to compile a kernel with this
	  option set.

2248
config COMPAT
2249
	def_bool y
2250
	depends on IA32_EMULATION || X86_X32
2251
	select ARCH_WANT_OLD_COMPAT_IPC
2252

2253
if COMPAT
2254
config COMPAT_FOR_U64_ALIGNMENT
2255
	def_bool y
2256 2257

config SYSVIPC_COMPAT
2258
	def_bool y
2259
	depends on SYSVIPC
2260

2261
config KEYS_COMPAT
2262 2263 2264
	def_bool y
	depends on KEYS
endif
2265

2266 2267 2268
endmenu


K
Keith Packard 已提交
2269 2270 2271 2272
config HAVE_ATOMIC_IOMAP
	def_bool y
	depends on X86_32

2273 2274 2275 2276
config HAVE_TEXT_POKE_SMP
	bool
	select STOP_MACHINE if SMP

2277 2278
config X86_DEV_DMA_OPS
	bool
2279
	depends on X86_64 || STA2X11
2280

2281 2282
config X86_DMA_REMAP
	bool
2283
	depends on STA2X11
2284

2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298
source "net/Kconfig"

source "drivers/Kconfig"

source "drivers/firmware/Kconfig"

source "fs/Kconfig"

source "arch/x86/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

2299 2300
source "arch/x86/kvm/Kconfig"

2301
source "lib/Kconfig"