Kconfig 58 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545154615471548154915501551155215531554155515561557155815591560156115621563156415651566156715681569157015711572157315741575157615771578157915801581158215831584158515861587158815891590159115921593159415951596159715981599160016011602160316041605160616071608160916101611161216131614161516161617161816191620162116221623162416251626162716281629163016311632163316341635163616371638163916401641164216431644164516461647164816491650165116521653165416551656165716581659166016611662166316641665166616671668166916701671167216731674167516761677167816791680168116821683168416851686168716881689169016911692169316941695169616971698169917001701170217031704170517061707170817091710171117121713171417151716171717181719172017211722172317241725172617271728172917301731173217331734173517361737173817391740174117421743174417451746174717481749175017511752175317541755175617571758175917601761176217631764176517661767176817691770177117721773177417751776177717781779178017811782178317841785178617871788178917901791179217931794179517961797179817991800180118021803180418051806180718081809181018111812181318141815181618171818181918201821182218231824182518261827182818291830183118321833183418351836183718381839184018411842
  1. # x86 configuration
  2. mainmenu "Linux Kernel Configuration for x86"
  3. # Select 32 or 64 bit
  4. config 64BIT
  5. bool "64-bit kernel" if ARCH = "x86"
  6. default ARCH = "x86_64"
  7. help
  8. Say yes to build a 64-bit kernel - formerly known as x86_64
  9. Say no to build a 32-bit kernel - formerly known as i386
  10. config X86_32
  11. def_bool !64BIT
  12. config X86_64
  13. def_bool 64BIT
  14. ### Arch settings
  15. config X86
  16. def_bool y
  17. select HAVE_UNSTABLE_SCHED_CLOCK
  18. select HAVE_IDE
  19. select HAVE_OPROFILE
  20. select HAVE_IOREMAP_PROT
  21. select HAVE_KPROBES
  22. select ARCH_WANT_OPTIONAL_GPIOLIB
  23. select HAVE_KRETPROBES
  24. select HAVE_DYNAMIC_FTRACE
  25. select HAVE_FTRACE
  26. select HAVE_KVM if ((X86_32 && !X86_VOYAGER && !X86_VISWS && !X86_NUMAQ) || X86_64)
  27. select HAVE_ARCH_KGDB if !X86_VOYAGER
  28. select HAVE_ARCH_TRACEHOOK
  29. select HAVE_GENERIC_DMA_COHERENT if X86_32
  30. select HAVE_EFFICIENT_UNALIGNED_ACCESS
  31. config ARCH_DEFCONFIG
  32. string
  33. default "arch/x86/configs/i386_defconfig" if X86_32
  34. default "arch/x86/configs/x86_64_defconfig" if X86_64
  35. config GENERIC_LOCKBREAK
  36. def_bool n
  37. config GENERIC_TIME
  38. def_bool y
  39. config GENERIC_CMOS_UPDATE
  40. def_bool y
  41. config CLOCKSOURCE_WATCHDOG
  42. def_bool y
  43. config GENERIC_CLOCKEVENTS
  44. def_bool y
  45. config GENERIC_CLOCKEVENTS_BROADCAST
  46. def_bool y
  47. depends on X86_64 || (X86_32 && X86_LOCAL_APIC)
  48. config LOCKDEP_SUPPORT
  49. def_bool y
  50. config STACKTRACE_SUPPORT
  51. def_bool y
  52. config HAVE_LATENCYTOP_SUPPORT
  53. def_bool y
  54. config FAST_CMPXCHG_LOCAL
  55. bool
  56. default y
  57. config MMU
  58. def_bool y
  59. config ZONE_DMA
  60. def_bool y
  61. config SBUS
  62. bool
  63. config GENERIC_ISA_DMA
  64. def_bool y
  65. config GENERIC_IOMAP
  66. def_bool y
  67. config GENERIC_BUG
  68. def_bool y
  69. depends on BUG
  70. config GENERIC_HWEIGHT
  71. def_bool y
  72. config GENERIC_GPIO
  73. def_bool n
  74. config ARCH_MAY_HAVE_PC_FDC
  75. def_bool y
  76. config RWSEM_GENERIC_SPINLOCK
  77. def_bool !X86_XADD
  78. config RWSEM_XCHGADD_ALGORITHM
  79. def_bool X86_XADD
  80. config ARCH_HAS_ILOG2_U32
  81. def_bool n
  82. config ARCH_HAS_ILOG2_U64
  83. def_bool n
  84. config ARCH_HAS_CPU_IDLE_WAIT
  85. def_bool y
  86. config GENERIC_CALIBRATE_DELAY
  87. def_bool y
  88. config GENERIC_TIME_VSYSCALL
  89. bool
  90. default X86_64
  91. config ARCH_HAS_CPU_RELAX
  92. def_bool y
  93. config ARCH_HAS_CACHE_LINE_SIZE
  94. def_bool y
  95. config HAVE_SETUP_PER_CPU_AREA
  96. def_bool X86_64_SMP || (X86_SMP && !X86_VOYAGER)
  97. config HAVE_CPUMASK_OF_CPU_MAP
  98. def_bool X86_64_SMP
  99. config ARCH_HIBERNATION_POSSIBLE
  100. def_bool y
  101. depends on !SMP || !X86_VOYAGER
  102. config ARCH_SUSPEND_POSSIBLE
  103. def_bool y
  104. depends on !X86_VOYAGER
  105. config ZONE_DMA32
  106. bool
  107. default X86_64
  108. config ARCH_POPULATES_NODE_MAP
  109. def_bool y
  110. config AUDIT_ARCH
  111. bool
  112. default X86_64
  113. config ARCH_SUPPORTS_AOUT
  114. def_bool y
  115. config ARCH_SUPPORTS_OPTIMIZED_INLINING
  116. def_bool y
  117. # Use the generic interrupt handling code in kernel/irq/:
  118. config GENERIC_HARDIRQS
  119. bool
  120. default y
  121. config GENERIC_IRQ_PROBE
  122. bool
  123. default y
  124. config GENERIC_PENDING_IRQ
  125. bool
  126. depends on GENERIC_HARDIRQS && SMP
  127. default y
  128. config X86_SMP
  129. bool
  130. depends on SMP && ((X86_32 && !X86_VOYAGER) || X86_64)
  131. select USE_GENERIC_SMP_HELPERS
  132. default y
  133. config X86_32_SMP
  134. def_bool y
  135. depends on X86_32 && SMP
  136. config X86_64_SMP
  137. def_bool y
  138. depends on X86_64 && SMP
  139. config X86_HT
  140. bool
  141. depends on SMP
  142. depends on (X86_32 && !X86_VOYAGER) || X86_64
  143. default y
  144. config X86_BIOS_REBOOT
  145. bool
  146. depends on !X86_VOYAGER
  147. default y
  148. config X86_TRAMPOLINE
  149. bool
  150. depends on X86_SMP || (X86_VOYAGER && SMP) || (64BIT && ACPI_SLEEP)
  151. default y
  152. config KTIME_SCALAR
  153. def_bool X86_32
  154. source "init/Kconfig"
  155. menu "Processor type and features"
  156. source "kernel/time/Kconfig"
  157. config SMP
  158. bool "Symmetric multi-processing support"
  159. ---help---
  160. This enables support for systems with more than one CPU. If you have
  161. a system with only one CPU, like most personal computers, say N. If
  162. you have a system with more than one CPU, say Y.
  163. If you say N here, the kernel will run on single and multiprocessor
  164. machines, but will use only one CPU of a multiprocessor machine. If
  165. you say Y here, the kernel will run on many, but not all,
  166. singleprocessor machines. On a singleprocessor machine, the kernel
  167. will run faster if you say N here.
  168. Note that if you say Y here and choose architecture "586" or
  169. "Pentium" under "Processor family", the kernel will not work on 486
  170. architectures. Similarly, multiprocessor kernels for the "PPro"
  171. architecture may not work on all Pentium based boards.
  172. People using multiprocessor machines who say Y here should also say
  173. Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
  174. Management" code will be disabled if you say Y here.
  175. See also <file:Documentation/i386/IO-APIC.txt>,
  176. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  177. <http://www.tldp.org/docs.html#howto>.
  178. If you don't know what to do here, say N.
  179. config X86_FIND_SMP_CONFIG
  180. def_bool y
  181. depends on X86_MPPARSE || X86_VOYAGER
  182. if ACPI
  183. config X86_MPPARSE
  184. def_bool y
  185. bool "Enable MPS table"
  186. depends on X86_LOCAL_APIC
  187. help
  188. For old smp systems that do not have proper acpi support. Newer systems
  189. (esp with 64bit cpus) with acpi support, MADT and DSDT will override it
  190. endif
  191. if !ACPI
  192. config X86_MPPARSE
  193. def_bool y
  194. depends on X86_LOCAL_APIC
  195. endif
  196. choice
  197. prompt "Subarchitecture Type"
  198. default X86_PC
  199. config X86_PC
  200. bool "PC-compatible"
  201. help
  202. Choose this option if your computer is a standard PC or compatible.
  203. config X86_ELAN
  204. bool "AMD Elan"
  205. depends on X86_32
  206. help
  207. Select this for an AMD Elan processor.
  208. Do not use this option for K6/Athlon/Opteron processors!
  209. If unsure, choose "PC-compatible" instead.
  210. config X86_VOYAGER
  211. bool "Voyager (NCR)"
  212. depends on X86_32 && (SMP || BROKEN) && !PCI
  213. help
  214. Voyager is an MCA-based 32-way capable SMP architecture proprietary
  215. to NCR Corp. Machine classes 345x/35xx/4100/51xx are Voyager-based.
  216. *** WARNING ***
  217. If you do not specifically know you have a Voyager based machine,
  218. say N here, otherwise the kernel you build will not be bootable.
  219. config X86_GENERICARCH
  220. bool "Generic architecture"
  221. depends on X86_32
  222. help
  223. This option compiles in the NUMAQ, Summit, bigsmp, ES7000, default
  224. subarchitectures. It is intended for a generic binary kernel.
  225. if you select them all, kernel will probe it one by one. and will
  226. fallback to default.
  227. if X86_GENERICARCH
  228. config X86_NUMAQ
  229. bool "NUMAQ (IBM/Sequent)"
  230. depends on SMP && X86_32 && PCI && X86_MPPARSE
  231. select NUMA
  232. help
  233. This option is used for getting Linux to run on a NUMAQ (IBM/Sequent)
  234. NUMA multiquad box. This changes the way that processors are
  235. bootstrapped, and uses Clustered Logical APIC addressing mode instead
  236. of Flat Logical. You will need a new lynxer.elf file to flash your
  237. firmware with - send email to <Martin.Bligh@us.ibm.com>.
  238. config X86_SUMMIT
  239. bool "Summit/EXA (IBM x440)"
  240. depends on X86_32 && SMP
  241. help
  242. This option is needed for IBM systems that use the Summit/EXA chipset.
  243. In particular, it is needed for the x440.
  244. config X86_ES7000
  245. bool "Support for Unisys ES7000 IA32 series"
  246. depends on X86_32 && SMP
  247. help
  248. Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
  249. supposed to run on an IA32-based Unisys ES7000 system.
  250. config X86_BIGSMP
  251. bool "Support for big SMP systems with more than 8 CPUs"
  252. depends on X86_32 && SMP
  253. help
  254. This option is needed for the systems that have more than 8 CPUs
  255. and if the system is not of any sub-arch type above.
  256. endif
  257. config X86_VSMP
  258. bool "Support for ScaleMP vSMP"
  259. select PARAVIRT
  260. depends on X86_64 && PCI
  261. help
  262. Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is
  263. supposed to run on these EM64T-based machines. Only choose this option
  264. if you have one of these machines.
  265. endchoice
  266. config X86_VISWS
  267. bool "SGI 320/540 (Visual Workstation)"
  268. depends on X86_32 && PCI && !X86_VOYAGER && X86_MPPARSE && PCI_GODIRECT
  269. help
  270. The SGI Visual Workstation series is an IA32-based workstation
  271. based on SGI systems chips with some legacy PC hardware attached.
  272. Say Y here to create a kernel to run on the SGI 320 or 540.
  273. A kernel compiled for the Visual Workstation will run on general
  274. PCs as well. See <file:Documentation/sgi-visws.txt> for details.
  275. config X86_RDC321X
  276. bool "RDC R-321x SoC"
  277. depends on X86_32
  278. select M486
  279. select X86_REBOOTFIXUPS
  280. help
  281. This option is needed for RDC R-321x system-on-chip, also known
  282. as R-8610-(G).
  283. If you don't have one of these chips, you should say N here.
  284. config SCHED_NO_NO_OMIT_FRAME_POINTER
  285. def_bool y
  286. prompt "Single-depth WCHAN output"
  287. depends on X86_32
  288. help
  289. Calculate simpler /proc/<PID>/wchan values. If this option
  290. is disabled then wchan values will recurse back to the
  291. caller function. This provides more accurate wchan values,
  292. at the expense of slightly more scheduling overhead.
  293. If in doubt, say "Y".
  294. menuconfig PARAVIRT_GUEST
  295. bool "Paravirtualized guest support"
  296. help
  297. Say Y here to get to see options related to running Linux under
  298. various hypervisors. This option alone does not add any kernel code.
  299. If you say N, all options in this submenu will be skipped and disabled.
  300. if PARAVIRT_GUEST
  301. source "arch/x86/xen/Kconfig"
  302. config VMI
  303. bool "VMI Guest support"
  304. select PARAVIRT
  305. depends on X86_32
  306. depends on !X86_VOYAGER
  307. help
  308. VMI provides a paravirtualized interface to the VMware ESX server
  309. (it could be used by other hypervisors in theory too, but is not
  310. at the moment), by linking the kernel to a GPL-ed ROM module
  311. provided by the hypervisor.
  312. config KVM_CLOCK
  313. bool "KVM paravirtualized clock"
  314. select PARAVIRT
  315. select PARAVIRT_CLOCK
  316. depends on !X86_VOYAGER
  317. help
  318. Turning on this option will allow you to run a paravirtualized clock
  319. when running over the KVM hypervisor. Instead of relying on a PIT
  320. (or probably other) emulation by the underlying device model, the host
  321. provides the guest with timing infrastructure such as time of day, and
  322. system time
  323. config KVM_GUEST
  324. bool "KVM Guest support"
  325. select PARAVIRT
  326. depends on !X86_VOYAGER
  327. help
  328. This option enables various optimizations for running under the KVM
  329. hypervisor.
  330. source "arch/x86/lguest/Kconfig"
  331. config PARAVIRT
  332. bool "Enable paravirtualization code"
  333. depends on !X86_VOYAGER
  334. help
  335. This changes the kernel so it can modify itself when it is run
  336. under a hypervisor, potentially improving performance significantly
  337. over full virtualization. However, when run without a hypervisor
  338. the kernel is theoretically slower and slightly larger.
  339. config PARAVIRT_CLOCK
  340. bool
  341. default n
  342. endif
  343. config PARAVIRT_DEBUG
  344. bool "paravirt-ops debugging"
  345. depends on PARAVIRT && DEBUG_KERNEL
  346. help
  347. Enable to debug paravirt_ops internals. Specifically, BUG if
  348. a paravirt_op is missing when it is called.
  349. config MEMTEST
  350. bool "Memtest"
  351. help
  352. This option adds a kernel parameter 'memtest', which allows memtest
  353. to be set.
  354. memtest=0, mean disabled; -- default
  355. memtest=1, mean do 1 test pattern;
  356. ...
  357. memtest=4, mean do 4 test patterns.
  358. If you are unsure how to answer this question, answer N.
  359. config X86_SUMMIT_NUMA
  360. def_bool y
  361. depends on X86_32 && NUMA && X86_GENERICARCH
  362. config X86_CYCLONE_TIMER
  363. def_bool y
  364. depends on X86_GENERICARCH
  365. config ES7000_CLUSTERED_APIC
  366. def_bool y
  367. depends on SMP && X86_ES7000 && MPENTIUMIII
  368. source "arch/x86/Kconfig.cpu"
  369. config HPET_TIMER
  370. def_bool X86_64
  371. prompt "HPET Timer Support" if X86_32
  372. help
  373. Use the IA-PC HPET (High Precision Event Timer) to manage
  374. time in preference to the PIT and RTC, if a HPET is
  375. present.
  376. HPET is the next generation timer replacing legacy 8254s.
  377. The HPET provides a stable time base on SMP
  378. systems, unlike the TSC, but it is more expensive to access,
  379. as it is off-chip. You can find the HPET spec at
  380. <http://www.intel.com/hardwaredesign/hpetspec.htm>.
  381. You can safely choose Y here. However, HPET will only be
  382. activated if the platform and the BIOS support this feature.
  383. Otherwise the 8254 will be used for timing services.
  384. Choose N to continue using the legacy 8254 timer.
  385. config HPET_EMULATE_RTC
  386. def_bool y
  387. depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y)
  388. # Mark as embedded because too many people got it wrong.
  389. # The code disables itself when not needed.
  390. config DMI
  391. default y
  392. bool "Enable DMI scanning" if EMBEDDED
  393. help
  394. Enabled scanning of DMI to identify machine quirks. Say Y
  395. here unless you have verified that your setup is not
  396. affected by entries in the DMI blacklist. Required by PNP
  397. BIOS code.
  398. config GART_IOMMU
  399. bool "GART IOMMU support" if EMBEDDED
  400. default y
  401. select SWIOTLB
  402. select AGP
  403. depends on X86_64 && PCI
  404. help
  405. Support for full DMA access of devices with 32bit memory access only
  406. on systems with more than 3GB. This is usually needed for USB,
  407. sound, many IDE/SATA chipsets and some other devices.
  408. Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART
  409. based hardware IOMMU and a software bounce buffer based IOMMU used
  410. on Intel systems and as fallback.
  411. The code is only active when needed (enough memory and limited
  412. device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified
  413. too.
  414. config CALGARY_IOMMU
  415. bool "IBM Calgary IOMMU support"
  416. select SWIOTLB
  417. depends on X86_64 && PCI && EXPERIMENTAL
  418. help
  419. Support for hardware IOMMUs in IBM's xSeries x366 and x460
  420. systems. Needed to run systems with more than 3GB of memory
  421. properly with 32-bit PCI devices that do not support DAC
  422. (Double Address Cycle). Calgary also supports bus level
  423. isolation, where all DMAs pass through the IOMMU. This
  424. prevents them from going anywhere except their intended
  425. destination. This catches hard-to-find kernel bugs and
  426. mis-behaving drivers and devices that do not use the DMA-API
  427. properly to set up their DMA buffers. The IOMMU can be
  428. turned off at boot time with the iommu=off parameter.
  429. Normally the kernel will make the right choice by itself.
  430. If unsure, say Y.
  431. config CALGARY_IOMMU_ENABLED_BY_DEFAULT
  432. def_bool y
  433. prompt "Should Calgary be enabled by default?"
  434. depends on CALGARY_IOMMU
  435. help
  436. Should Calgary be enabled by default? if you choose 'y', Calgary
  437. will be used (if it exists). If you choose 'n', Calgary will not be
  438. used even if it exists. If you choose 'n' and would like to use
  439. Calgary anyway, pass 'iommu=calgary' on the kernel command line.
  440. If unsure, say Y.
  441. config AMD_IOMMU
  442. bool "AMD IOMMU support"
  443. select SWIOTLB
  444. depends on X86_64 && PCI && ACPI
  445. help
  446. With this option you can enable support for AMD IOMMU hardware in
  447. your system. An IOMMU is a hardware component which provides
  448. remapping of DMA memory accesses from devices. With an AMD IOMMU you
  449. can isolate the the DMA memory of different devices and protect the
  450. system from misbehaving device drivers or hardware.
  451. You can find out if your system has an AMD IOMMU if you look into
  452. your BIOS for an option to enable it or if you have an IVRS ACPI
  453. table.
  454. # need this always selected by IOMMU for the VIA workaround
  455. config SWIOTLB
  456. bool
  457. help
  458. Support for software bounce buffers used on x86-64 systems
  459. which don't have a hardware IOMMU (e.g. the current generation
  460. of Intel's x86-64 CPUs). Using this PCI devices which can only
  461. access 32-bits of memory can be used on systems with more than
  462. 3 GB of memory. If unsure, say Y.
  463. config IOMMU_HELPER
  464. def_bool (CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU)
  465. config MAXSMP
  466. bool "Configure Maximum number of SMP Processors and NUMA Nodes"
  467. depends on X86_64 && SMP && BROKEN
  468. default n
  469. help
  470. Configure maximum number of CPUS and NUMA Nodes for this architecture.
  471. If unsure, say N.
  472. config NR_CPUS
  473. int "Maximum number of CPUs (2-512)" if !MAXSMP
  474. range 2 512
  475. depends on SMP
  476. default "4096" if MAXSMP
  477. default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
  478. default "8"
  479. help
  480. This allows you to specify the maximum number of CPUs which this
  481. kernel will support. The maximum supported value is 512 and the
  482. minimum value which makes sense is 2.
  483. This is purely to save memory - each supported CPU adds
  484. approximately eight kilobytes to the kernel image.
  485. config SCHED_SMT
  486. bool "SMT (Hyperthreading) scheduler support"
  487. depends on X86_HT
  488. help
  489. SMT scheduler support improves the CPU scheduler's decision making
  490. when dealing with Intel Pentium 4 chips with HyperThreading at a
  491. cost of slightly increased overhead in some places. If unsure say
  492. N here.
  493. config SCHED_MC
  494. def_bool y
  495. prompt "Multi-core scheduler support"
  496. depends on X86_HT
  497. help
  498. Multi-core scheduler support improves the CPU scheduler's decision
  499. making when dealing with multi-core CPU chips at a cost of slightly
  500. increased overhead in some places. If unsure say N here.
  501. source "kernel/Kconfig.preempt"
  502. config X86_UP_APIC
  503. bool "Local APIC support on uniprocessors"
  504. depends on X86_32 && !SMP && !(X86_VOYAGER || X86_GENERICARCH)
  505. help
  506. A local APIC (Advanced Programmable Interrupt Controller) is an
  507. integrated interrupt controller in the CPU. If you have a single-CPU
  508. system which has a processor with a local APIC, you can say Y here to
  509. enable and use it. If you say Y here even though your machine doesn't
  510. have a local APIC, then the kernel will still run with no slowdown at
  511. all. The local APIC supports CPU-generated self-interrupts (timer,
  512. performance counters), and the NMI watchdog which detects hard
  513. lockups.
  514. config X86_UP_IOAPIC
  515. bool "IO-APIC support on uniprocessors"
  516. depends on X86_UP_APIC
  517. help
  518. An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
  519. SMP-capable replacement for PC-style interrupt controllers. Most
  520. SMP systems and many recent uniprocessor systems have one.
  521. If you have a single-CPU system with an IO-APIC, you can say Y here
  522. to use it. If you say Y here even though your machine doesn't have
  523. an IO-APIC, then the kernel will still run with no slowdown at all.
  524. config X86_LOCAL_APIC
  525. def_bool y
  526. depends on X86_64 || (X86_32 && (X86_UP_APIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
  527. config X86_IO_APIC
  528. def_bool y
  529. depends on X86_64 || (X86_32 && (X86_UP_IOAPIC || (SMP && !X86_VOYAGER) || X86_GENERICARCH))
  530. config X86_VISWS_APIC
  531. def_bool y
  532. depends on X86_32 && X86_VISWS
  533. config X86_MCE
  534. bool "Machine Check Exception"
  535. depends on !X86_VOYAGER
  536. ---help---
  537. Machine Check Exception support allows the processor to notify the
  538. kernel if it detects a problem (e.g. overheating, component failure).
  539. The action the kernel takes depends on the severity of the problem,
  540. ranging from a warning message on the console, to halting the machine.
  541. Your processor must be a Pentium or newer to support this - check the
  542. flags in /proc/cpuinfo for mce. Note that some older Pentium systems
  543. have a design flaw which leads to false MCE events - hence MCE is
  544. disabled on all P5 processors, unless explicitly enabled with "mce"
  545. as a boot argument. Similarly, if MCE is built in and creates a
  546. problem on some new non-standard machine, you can boot with "nomce"
  547. to disable it. MCE support simply ignores non-MCE processors like
  548. the 386 and 486, so nearly everyone can say Y here.
  549. config X86_MCE_INTEL
  550. def_bool y
  551. prompt "Intel MCE features"
  552. depends on X86_64 && X86_MCE && X86_LOCAL_APIC
  553. help
  554. Additional support for intel specific MCE features such as
  555. the thermal monitor.
  556. config X86_MCE_AMD
  557. def_bool y
  558. prompt "AMD MCE features"
  559. depends on X86_64 && X86_MCE && X86_LOCAL_APIC
  560. help
  561. Additional support for AMD specific MCE features such as
  562. the DRAM Error Threshold.
  563. config X86_MCE_NONFATAL
  564. tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
  565. depends on X86_32 && X86_MCE
  566. help
  567. Enabling this feature starts a timer that triggers every 5 seconds which
  568. will look at the machine check registers to see if anything happened.
  569. Non-fatal problems automatically get corrected (but still logged).
  570. Disable this if you don't want to see these messages.
  571. Seeing the messages this option prints out may be indicative of dying
  572. or out-of-spec (ie, overclocked) hardware.
  573. This option only does something on certain CPUs.
  574. (AMD Athlon/Duron and Intel Pentium 4)
  575. config X86_MCE_P4THERMAL
  576. bool "check for P4 thermal throttling interrupt."
  577. depends on X86_32 && X86_MCE && (X86_UP_APIC || SMP)
  578. help
  579. Enabling this feature will cause a message to be printed when the P4
  580. enters thermal throttling.
  581. config VM86
  582. bool "Enable VM86 support" if EMBEDDED
  583. default y
  584. depends on X86_32
  585. help
  586. This option is required by programs like DOSEMU to run 16-bit legacy
  587. code on X86 processors. It also may be needed by software like
  588. XFree86 to initialize some video cards via BIOS. Disabling this
  589. option saves about 6k.
  590. config TOSHIBA
  591. tristate "Toshiba Laptop support"
  592. depends on X86_32
  593. ---help---
  594. This adds a driver to safely access the System Management Mode of
  595. the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
  596. not work on models with a Phoenix BIOS. The System Management Mode
  597. is used to set the BIOS and power saving options on Toshiba portables.
  598. For information on utilities to make use of this driver see the
  599. Toshiba Linux utilities web site at:
  600. <http://www.buzzard.org.uk/toshiba/>.
  601. Say Y if you intend to run this kernel on a Toshiba portable.
  602. Say N otherwise.
  603. config I8K
  604. tristate "Dell laptop support"
  605. ---help---
  606. This adds a driver to safely access the System Management Mode
  607. of the CPU on the Dell Inspiron 8000. The System Management Mode
  608. is used to read cpu temperature and cooling fan status and to
  609. control the fans on the I8K portables.
  610. This driver has been tested only on the Inspiron 8000 but it may
  611. also work with other Dell laptops. You can force loading on other
  612. models by passing the parameter `force=1' to the module. Use at
  613. your own risk.
  614. For information on utilities to make use of this driver see the
  615. I8K Linux utilities web site at:
  616. <http://people.debian.org/~dz/i8k/>
  617. Say Y if you intend to run this kernel on a Dell Inspiron 8000.
  618. Say N otherwise.
  619. config X86_REBOOTFIXUPS
  620. def_bool n
  621. prompt "Enable X86 board specific fixups for reboot"
  622. depends on X86_32 && X86
  623. ---help---
  624. This enables chipset and/or board specific fixups to be done
  625. in order to get reboot to work correctly. This is only needed on
  626. some combinations of hardware and BIOS. The symptom, for which
  627. this config is intended, is when reboot ends with a stalled/hung
  628. system.
  629. Currently, the only fixup is for the Geode machines using
  630. CS5530A and CS5536 chipsets and the RDC R-321x SoC.
  631. Say Y if you want to enable the fixup. Currently, it's safe to
  632. enable this option even if you don't need it.
  633. Say N otherwise.
  634. config MICROCODE
  635. tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
  636. select FW_LOADER
  637. ---help---
  638. If you say Y here, you will be able to update the microcode on
  639. Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
  640. Pentium III, Pentium 4, Xeon etc. You will obviously need the
  641. actual microcode binary data itself which is not shipped with the
  642. Linux kernel.
  643. For latest news and information on obtaining all the required
  644. ingredients for this driver, check:
  645. <http://www.urbanmyth.org/microcode/>.
  646. To compile this driver as a module, choose M here: the
  647. module will be called microcode.
  648. config MICROCODE_OLD_INTERFACE
  649. def_bool y
  650. depends on MICROCODE
  651. config X86_MSR
  652. tristate "/dev/cpu/*/msr - Model-specific register support"
  653. help
  654. This device gives privileged processes access to the x86
  655. Model-Specific Registers (MSRs). It is a character device with
  656. major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
  657. MSR accesses are directed to a specific CPU on multi-processor
  658. systems.
  659. config X86_CPUID
  660. tristate "/dev/cpu/*/cpuid - CPU information support"
  661. help
  662. This device gives processes access to the x86 CPUID instruction to
  663. be executed on a specific processor. It is a character device
  664. with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
  665. /dev/cpu/31/cpuid.
  666. choice
  667. prompt "High Memory Support"
  668. default HIGHMEM4G if !X86_NUMAQ
  669. default HIGHMEM64G if X86_NUMAQ
  670. depends on X86_32
  671. config NOHIGHMEM
  672. bool "off"
  673. depends on !X86_NUMAQ
  674. ---help---
  675. Linux can use up to 64 Gigabytes of physical memory on x86 systems.
  676. However, the address space of 32-bit x86 processors is only 4
  677. Gigabytes large. That means that, if you have a large amount of
  678. physical memory, not all of it can be "permanently mapped" by the
  679. kernel. The physical memory that's not permanently mapped is called
  680. "high memory".
  681. If you are compiling a kernel which will never run on a machine with
  682. more than 1 Gigabyte total physical RAM, answer "off" here (default
  683. choice and suitable for most users). This will result in a "3GB/1GB"
  684. split: 3GB are mapped so that each process sees a 3GB virtual memory
  685. space and the remaining part of the 4GB virtual memory space is used
  686. by the kernel to permanently map as much physical memory as
  687. possible.
  688. If the machine has between 1 and 4 Gigabytes physical RAM, then
  689. answer "4GB" here.
  690. If more than 4 Gigabytes is used then answer "64GB" here. This
  691. selection turns Intel PAE (Physical Address Extension) mode on.
  692. PAE implements 3-level paging on IA32 processors. PAE is fully
  693. supported by Linux, PAE mode is implemented on all recent Intel
  694. processors (Pentium Pro and better). NOTE: If you say "64GB" here,
  695. then the kernel will not boot on CPUs that don't support PAE!
  696. The actual amount of total physical memory will either be
  697. auto detected or can be forced by using a kernel command line option
  698. such as "mem=256M". (Try "man bootparam" or see the documentation of
  699. your boot loader (lilo or loadlin) about how to pass options to the
  700. kernel at boot time.)
  701. If unsure, say "off".
  702. config HIGHMEM4G
  703. bool "4GB"
  704. depends on !X86_NUMAQ
  705. help
  706. Select this if you have a 32-bit processor and between 1 and 4
  707. gigabytes of physical RAM.
  708. config HIGHMEM64G
  709. bool "64GB"
  710. depends on !M386 && !M486
  711. select X86_PAE
  712. help
  713. Select this if you have a 32-bit processor and more than 4
  714. gigabytes of physical RAM.
  715. endchoice
  716. choice
  717. depends on EXPERIMENTAL
  718. prompt "Memory split" if EMBEDDED
  719. default VMSPLIT_3G
  720. depends on X86_32
  721. help
  722. Select the desired split between kernel and user memory.
  723. If the address range available to the kernel is less than the
  724. physical memory installed, the remaining memory will be available
  725. as "high memory". Accessing high memory is a little more costly
  726. than low memory, as it needs to be mapped into the kernel first.
  727. Note that increasing the kernel address space limits the range
  728. available to user programs, making the address space there
  729. tighter. Selecting anything other than the default 3G/1G split
  730. will also likely make your kernel incompatible with binary-only
  731. kernel modules.
  732. If you are not absolutely sure what you are doing, leave this
  733. option alone!
  734. config VMSPLIT_3G
  735. bool "3G/1G user/kernel split"
  736. config VMSPLIT_3G_OPT
  737. depends on !X86_PAE
  738. bool "3G/1G user/kernel split (for full 1G low memory)"
  739. config VMSPLIT_2G
  740. bool "2G/2G user/kernel split"
  741. config VMSPLIT_2G_OPT
  742. depends on !X86_PAE
  743. bool "2G/2G user/kernel split (for full 2G low memory)"
  744. config VMSPLIT_1G
  745. bool "1G/3G user/kernel split"
  746. endchoice
  747. config PAGE_OFFSET
  748. hex
  749. default 0xB0000000 if VMSPLIT_3G_OPT
  750. default 0x80000000 if VMSPLIT_2G
  751. default 0x78000000 if VMSPLIT_2G_OPT
  752. default 0x40000000 if VMSPLIT_1G
  753. default 0xC0000000
  754. depends on X86_32
  755. config HIGHMEM
  756. def_bool y
  757. depends on X86_32 && (HIGHMEM64G || HIGHMEM4G)
  758. config X86_PAE
  759. def_bool n
  760. prompt "PAE (Physical Address Extension) Support"
  761. depends on X86_32 && !HIGHMEM4G
  762. select RESOURCES_64BIT
  763. help
  764. PAE is required for NX support, and furthermore enables
  765. larger swapspace support for non-overcommit purposes. It
  766. has the cost of more pagetable lookup overhead, and also
  767. consumes more pagetable space per process.
  768. # Common NUMA Features
  769. config NUMA
  770. bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)"
  771. depends on SMP
  772. depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL)
  773. default n if X86_PC
  774. default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP)
  775. help
  776. Enable NUMA (Non Uniform Memory Access) support.
  777. The kernel will try to allocate memory used by a CPU on the
  778. local memory controller of the CPU and add some more
  779. NUMA awareness to the kernel.
  780. For 32-bit this is currently highly experimental and should be only
  781. used for kernel development. It might also cause boot failures.
  782. For 64-bit this is recommended on all multiprocessor Opteron systems.
  783. If the system is EM64T, you should say N unless your system is
  784. EM64T NUMA.
  785. comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
  786. depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI)
  787. config K8_NUMA
  788. def_bool y
  789. prompt "Old style AMD Opteron NUMA detection"
  790. depends on X86_64 && NUMA && PCI
  791. help
  792. Enable K8 NUMA node topology detection. You should say Y here if
  793. you have a multi processor AMD K8 system. This uses an old
  794. method to read the NUMA configuration directly from the builtin
  795. Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA
  796. instead, which also takes priority if both are compiled in.
  797. config X86_64_ACPI_NUMA
  798. def_bool y
  799. prompt "ACPI NUMA detection"
  800. depends on X86_64 && NUMA && ACPI && PCI
  801. select ACPI_NUMA
  802. help
  803. Enable ACPI SRAT based node topology detection.
  804. # Some NUMA nodes have memory ranges that span
  805. # other nodes. Even though a pfn is valid and
  806. # between a node's start and end pfns, it may not
  807. # reside on that node. See memmap_init_zone()
  808. # for details.
  809. config NODES_SPAN_OTHER_NODES
  810. def_bool y
  811. depends on X86_64_ACPI_NUMA
  812. config NUMA_EMU
  813. bool "NUMA emulation"
  814. depends on X86_64 && NUMA
  815. help
  816. Enable NUMA emulation. A flat machine will be split
  817. into virtual nodes when booted with "numa=fake=N", where N is the
  818. number of nodes. This is only useful for debugging.
  819. config NODES_SHIFT
  820. int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP
  821. range 1 9 if X86_64
  822. default "9" if MAXSMP
  823. default "6" if X86_64
  824. default "4" if X86_NUMAQ
  825. default "3"
  826. depends on NEED_MULTIPLE_NODES
  827. help
  828. Specify the maximum number of NUMA Nodes available on the target
  829. system. Increases memory reserved to accomodate various tables.
  830. config HAVE_ARCH_BOOTMEM_NODE
  831. def_bool y
  832. depends on X86_32 && NUMA
  833. config ARCH_HAVE_MEMORY_PRESENT
  834. def_bool y
  835. depends on X86_32 && DISCONTIGMEM
  836. config NEED_NODE_MEMMAP_SIZE
  837. def_bool y
  838. depends on X86_32 && (DISCONTIGMEM || SPARSEMEM)
  839. config HAVE_ARCH_ALLOC_REMAP
  840. def_bool y
  841. depends on X86_32 && NUMA
  842. config ARCH_FLATMEM_ENABLE
  843. def_bool y
  844. depends on X86_32 && ARCH_SELECT_MEMORY_MODEL && !NUMA
  845. config ARCH_DISCONTIGMEM_ENABLE
  846. def_bool y
  847. depends on NUMA && X86_32
  848. config ARCH_DISCONTIGMEM_DEFAULT
  849. def_bool y
  850. depends on NUMA && X86_32
  851. config ARCH_SPARSEMEM_DEFAULT
  852. def_bool y
  853. depends on X86_64
  854. config ARCH_SPARSEMEM_ENABLE
  855. def_bool y
  856. depends on X86_64 || NUMA || (EXPERIMENTAL && X86_PC) || X86_GENERICARCH
  857. select SPARSEMEM_STATIC if X86_32
  858. select SPARSEMEM_VMEMMAP_ENABLE if X86_64
  859. config ARCH_SELECT_MEMORY_MODEL
  860. def_bool y
  861. depends on ARCH_SPARSEMEM_ENABLE
  862. config ARCH_MEMORY_PROBE
  863. def_bool X86_64
  864. depends on MEMORY_HOTPLUG
  865. source "mm/Kconfig"
  866. config HIGHPTE
  867. bool "Allocate 3rd-level pagetables from highmem"
  868. depends on X86_32 && (HIGHMEM4G || HIGHMEM64G)
  869. help
  870. The VM uses one page table entry for each page of physical memory.
  871. For systems with a lot of RAM, this can be wasteful of precious
  872. low memory. Setting this option will put user-space page table
  873. entries in high memory.
  874. config MATH_EMULATION
  875. bool
  876. prompt "Math emulation" if X86_32
  877. ---help---
  878. Linux can emulate a math coprocessor (used for floating point
  879. operations) if you don't have one. 486DX and Pentium processors have
  880. a math coprocessor built in, 486SX and 386 do not, unless you added
  881. a 487DX or 387, respectively. (The messages during boot time can
  882. give you some hints here ["man dmesg"].) Everyone needs either a
  883. coprocessor or this emulation.
  884. If you don't have a math coprocessor, you need to say Y here; if you
  885. say Y here even though you have a coprocessor, the coprocessor will
  886. be used nevertheless. (This behavior can be changed with the kernel
  887. command line option "no387", which comes handy if your coprocessor
  888. is broken. Try "man bootparam" or see the documentation of your boot
  889. loader (lilo or loadlin) about how to pass options to the kernel at
  890. boot time.) This means that it is a good idea to say Y here if you
  891. intend to use this kernel on different machines.
  892. More information about the internals of the Linux math coprocessor
  893. emulation can be found in <file:arch/x86/math-emu/README>.
  894. If you are not sure, say Y; apart from resulting in a 66 KB bigger
  895. kernel, it won't hurt.
  896. config MTRR
  897. bool "MTRR (Memory Type Range Register) support"
  898. ---help---
  899. On Intel P6 family processors (Pentium Pro, Pentium II and later)
  900. the Memory Type Range Registers (MTRRs) may be used to control
  901. processor access to memory ranges. This is most useful if you have
  902. a video (VGA) card on a PCI or AGP bus. Enabling write-combining
  903. allows bus write transfers to be combined into a larger transfer
  904. before bursting over the PCI/AGP bus. This can increase performance
  905. of image write operations 2.5 times or more. Saying Y here creates a
  906. /proc/mtrr file which may be used to manipulate your processor's
  907. MTRRs. Typically the X server should use this.
  908. This code has a reasonably generic interface so that similar
  909. control registers on other processors can be easily supported
  910. as well:
  911. The Cyrix 6x86, 6x86MX and M II processors have Address Range
  912. Registers (ARRs) which provide a similar functionality to MTRRs. For
  913. these, the ARRs are used to emulate the MTRRs.
  914. The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
  915. MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
  916. write-combining. All of these processors are supported by this code
  917. and it makes sense to say Y here if you have one of them.
  918. Saying Y here also fixes a problem with buggy SMP BIOSes which only
  919. set the MTRRs for the boot CPU and not for the secondary CPUs. This
  920. can lead to all sorts of problems, so it's good to say Y here.
  921. You can safely say Y even if your machine doesn't have MTRRs, you'll
  922. just add about 9 KB to your kernel.
  923. See <file:Documentation/x86/mtrr.txt> for more information.
  924. config MTRR_SANITIZER
  925. def_bool y
  926. prompt "MTRR cleanup support"
  927. depends on MTRR
  928. help
  929. Convert MTRR layout from continuous to discrete, so X drivers can
  930. add writeback entries.
  931. Can be disabled with disable_mtrr_cleanup on the kernel command line.
  932. The largest mtrr entry size for a continous block can be set with
  933. mtrr_chunk_size.
  934. If unsure, say Y.
  935. config MTRR_SANITIZER_ENABLE_DEFAULT
  936. int "MTRR cleanup enable value (0-1)"
  937. range 0 1
  938. default "0"
  939. depends on MTRR_SANITIZER
  940. help
  941. Enable mtrr cleanup default value
  942. config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
  943. int "MTRR cleanup spare reg num (0-7)"
  944. range 0 7
  945. default "1"
  946. depends on MTRR_SANITIZER
  947. help
  948. mtrr cleanup spare entries default, it can be changed via
  949. mtrr_spare_reg_nr=N on the kernel command line.
  950. config X86_PAT
  951. bool
  952. prompt "x86 PAT support"
  953. depends on MTRR
  954. help
  955. Use PAT attributes to setup page level cache control.
  956. PATs are the modern equivalents of MTRRs and are much more
  957. flexible than MTRRs.
  958. Say N here if you see bootup problems (boot crash, boot hang,
  959. spontaneous reboots) or a non-working video driver.
  960. If unsure, say Y.
  961. config EFI
  962. def_bool n
  963. prompt "EFI runtime service support"
  964. depends on ACPI
  965. ---help---
  966. This enables the kernel to use EFI runtime services that are
  967. available (such as the EFI variable services).
  968. This option is only useful on systems that have EFI firmware.
  969. In addition, you should use the latest ELILO loader available
  970. at <http://elilo.sourceforge.net> in order to take advantage
  971. of EFI runtime services. However, even with this option, the
  972. resultant kernel should continue to boot on existing non-EFI
  973. platforms.
  974. config IRQBALANCE
  975. def_bool y
  976. prompt "Enable kernel irq balancing"
  977. depends on X86_32 && SMP && X86_IO_APIC
  978. help
  979. The default yes will allow the kernel to do irq load balancing.
  980. Saying no will keep the kernel from doing irq load balancing.
  981. config SECCOMP
  982. def_bool y
  983. prompt "Enable seccomp to safely compute untrusted bytecode"
  984. help
  985. This kernel feature is useful for number crunching applications
  986. that may need to compute untrusted bytecode during their
  987. execution. By using pipes or other transports made available to
  988. the process as file descriptors supporting the read/write
  989. syscalls, it's possible to isolate those applications in
  990. their own address space using seccomp. Once seccomp is
  991. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  992. and the task is only allowed to execute a few safe syscalls
  993. defined by each seccomp mode.
  994. If unsure, say Y. Only embedded should say N here.
  995. config CC_STACKPROTECTOR
  996. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  997. depends on X86_64 && EXPERIMENTAL && BROKEN
  998. help
  999. This option turns on the -fstack-protector GCC feature. This
  1000. feature puts, at the beginning of critical functions, a canary
  1001. value on the stack just before the return address, and validates
  1002. the value just before actually returning. Stack based buffer
  1003. overflows (that need to overwrite this return address) now also
  1004. overwrite the canary, which gets detected and the attack is then
  1005. neutralized via a kernel panic.
  1006. This feature requires gcc version 4.2 or above, or a distribution
  1007. gcc with the feature backported. Older versions are automatically
  1008. detected and for those versions, this configuration option is ignored.
  1009. config CC_STACKPROTECTOR_ALL
  1010. bool "Use stack-protector for all functions"
  1011. depends on CC_STACKPROTECTOR
  1012. help
  1013. Normally, GCC only inserts the canary value protection for
  1014. functions that use large-ish on-stack buffers. By enabling
  1015. this option, GCC will be asked to do this for ALL functions.
  1016. source kernel/Kconfig.hz
  1017. config KEXEC
  1018. bool "kexec system call"
  1019. depends on X86_BIOS_REBOOT
  1020. help
  1021. kexec is a system call that implements the ability to shutdown your
  1022. current kernel, and to start another kernel. It is like a reboot
  1023. but it is independent of the system firmware. And like a reboot
  1024. you can start any kernel with it, not just Linux.
  1025. The name comes from the similarity to the exec system call.
  1026. It is an ongoing process to be certain the hardware in a machine
  1027. is properly shutdown, so do not be surprised if this code does not
  1028. initially work for you. It may help to enable device hotplugging
  1029. support. As of this writing the exact hardware interface is
  1030. strongly in flux, so no good recommendation can be made.
  1031. config CRASH_DUMP
  1032. bool "kernel crash dumps"
  1033. depends on X86_64 || (X86_32 && HIGHMEM)
  1034. help
  1035. Generate crash dump after being started by kexec.
  1036. This should be normally only set in special crash dump kernels
  1037. which are loaded in the main kernel with kexec-tools into
  1038. a specially reserved region and then later executed after
  1039. a crash by kdump/kexec. The crash dump kernel must be compiled
  1040. to a memory address not used by the main kernel or BIOS using
  1041. PHYSICAL_START, or it must be built as a relocatable image
  1042. (CONFIG_RELOCATABLE=y).
  1043. For more details see Documentation/kdump/kdump.txt
  1044. config KEXEC_JUMP
  1045. bool "kexec jump (EXPERIMENTAL)"
  1046. depends on EXPERIMENTAL
  1047. depends on KEXEC && HIBERNATION && X86_32
  1048. help
  1049. Jump between original kernel and kexeced kernel and invoke
  1050. code in physical address mode via KEXEC
  1051. config PHYSICAL_START
  1052. hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP)
  1053. default "0x1000000" if X86_NUMAQ
  1054. default "0x200000" if X86_64
  1055. default "0x100000"
  1056. help
  1057. This gives the physical address where the kernel is loaded.
  1058. If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then
  1059. bzImage will decompress itself to above physical address and
  1060. run from there. Otherwise, bzImage will run from the address where
  1061. it has been loaded by the boot loader and will ignore above physical
  1062. address.
  1063. In normal kdump cases one does not have to set/change this option
  1064. as now bzImage can be compiled as a completely relocatable image
  1065. (CONFIG_RELOCATABLE=y) and be used to load and run from a different
  1066. address. This option is mainly useful for the folks who don't want
  1067. to use a bzImage for capturing the crash dump and want to use a
  1068. vmlinux instead. vmlinux is not relocatable hence a kernel needs
  1069. to be specifically compiled to run from a specific memory area
  1070. (normally a reserved region) and this option comes handy.
  1071. So if you are using bzImage for capturing the crash dump, leave
  1072. the value here unchanged to 0x100000 and set CONFIG_RELOCATABLE=y.
  1073. Otherwise if you plan to use vmlinux for capturing the crash dump
  1074. change this value to start of the reserved region (Typically 16MB
  1075. 0x1000000). In other words, it can be set based on the "X" value as
  1076. specified in the "crashkernel=YM@XM" command line boot parameter
  1077. passed to the panic-ed kernel. Typically this parameter is set as
  1078. crashkernel=64M@16M. Please take a look at
  1079. Documentation/kdump/kdump.txt for more details about crash dumps.
  1080. Usage of bzImage for capturing the crash dump is recommended as
  1081. one does not have to build two kernels. Same kernel can be used
  1082. as production kernel and capture kernel. Above option should have
  1083. gone away after relocatable bzImage support is introduced. But it
  1084. is present because there are users out there who continue to use
  1085. vmlinux for dump capture. This option should go away down the
  1086. line.
  1087. Don't change this unless you know what you are doing.
  1088. config RELOCATABLE
  1089. bool "Build a relocatable kernel (EXPERIMENTAL)"
  1090. depends on EXPERIMENTAL
  1091. help
  1092. This builds a kernel image that retains relocation information
  1093. so it can be loaded someplace besides the default 1MB.
  1094. The relocations tend to make the kernel binary about 10% larger,
  1095. but are discarded at runtime.
  1096. One use is for the kexec on panic case where the recovery kernel
  1097. must live at a different physical address than the primary
  1098. kernel.
  1099. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  1100. it has been loaded at and the compile time physical address
  1101. (CONFIG_PHYSICAL_START) is ignored.
  1102. config PHYSICAL_ALIGN
  1103. hex
  1104. prompt "Alignment value to which kernel should be aligned" if X86_32
  1105. default "0x100000" if X86_32
  1106. default "0x200000" if X86_64
  1107. range 0x2000 0x400000
  1108. help
  1109. This value puts the alignment restrictions on physical address
  1110. where kernel is loaded and run from. Kernel is compiled for an
  1111. address which meets above alignment restriction.
  1112. If bootloader loads the kernel at a non-aligned address and
  1113. CONFIG_RELOCATABLE is set, kernel will move itself to nearest
  1114. address aligned to above value and run from there.
  1115. If bootloader loads the kernel at a non-aligned address and
  1116. CONFIG_RELOCATABLE is not set, kernel will ignore the run time
  1117. load address and decompress itself to the address it has been
  1118. compiled for and run from there. The address for which kernel is
  1119. compiled already meets above alignment restrictions. Hence the
  1120. end result is that kernel runs from a physical address meeting
  1121. above alignment restrictions.
  1122. Don't change this unless you know what you are doing.
  1123. config HOTPLUG_CPU
  1124. bool "Support for hot-pluggable CPUs"
  1125. depends on SMP && HOTPLUG && !X86_VOYAGER
  1126. ---help---
  1127. Say Y here to allow turning CPUs off and on. CPUs can be
  1128. controlled through /sys/devices/system/cpu.
  1129. ( Note: power management support will enable this option
  1130. automatically on SMP systems. )
  1131. Say N if you want to disable CPU hotplug.
  1132. config COMPAT_VDSO
  1133. def_bool y
  1134. prompt "Compat VDSO support"
  1135. depends on X86_32 || IA32_EMULATION
  1136. help
  1137. Map the 32-bit VDSO to the predictable old-style address too.
  1138. ---help---
  1139. Say N here if you are running a sufficiently recent glibc
  1140. version (2.3.3 or later), to remove the high-mapped
  1141. VDSO mapping and to exclusively use the randomized VDSO.
  1142. If unsure, say Y.
  1143. config CMDLINE_BOOL
  1144. bool "Built-in kernel command line"
  1145. default n
  1146. help
  1147. Allow for specifying boot arguments to the kernel at
  1148. build time. On some systems (e.g. embedded ones), it is
  1149. necessary or convenient to provide some or all of the
  1150. kernel boot arguments with the kernel itself (that is,
  1151. to not rely on the boot loader to provide them.)
  1152. To compile command line arguments into the kernel,
  1153. set this option to 'Y', then fill in the
  1154. the boot arguments in CONFIG_CMDLINE.
  1155. Systems with fully functional boot loaders (i.e. non-embedded)
  1156. should leave this option set to 'N'.
  1157. config CMDLINE
  1158. string "Built-in kernel command string"
  1159. depends on CMDLINE_BOOL
  1160. default ""
  1161. help
  1162. Enter arguments here that should be compiled into the kernel
  1163. image and used at boot time. If the boot loader provides a
  1164. command line at boot time, it is appended to this string to
  1165. form the full kernel command line, when the system boots.
  1166. However, you can use the CONFIG_CMDLINE_OVERRIDE option to
  1167. change this behavior.
  1168. In most cases, the command line (whether built-in or provided
  1169. by the boot loader) should specify the device for the root
  1170. file system.
  1171. config CMDLINE_OVERRIDE
  1172. bool "Built-in command line overrides boot loader arguments"
  1173. default n
  1174. depends on CMDLINE_BOOL
  1175. help
  1176. Set this option to 'Y' to have the kernel ignore the boot loader
  1177. command line, and use ONLY the built-in command line.
  1178. This is used to work around broken boot loaders. This should
  1179. be set to 'N' under normal conditions.
  1180. endmenu
  1181. config ARCH_ENABLE_MEMORY_HOTPLUG
  1182. def_bool y
  1183. depends on X86_64 || (X86_32 && HIGHMEM)
  1184. config HAVE_ARCH_EARLY_PFN_TO_NID
  1185. def_bool X86_64
  1186. depends on NUMA
  1187. menu "Power management options"
  1188. depends on !X86_VOYAGER
  1189. config ARCH_HIBERNATION_HEADER
  1190. def_bool y
  1191. depends on X86_64 && HIBERNATION
  1192. source "kernel/power/Kconfig"
  1193. source "drivers/acpi/Kconfig"
  1194. config X86_APM_BOOT
  1195. bool
  1196. default y
  1197. depends on APM || APM_MODULE
  1198. menuconfig APM
  1199. tristate "APM (Advanced Power Management) BIOS support"
  1200. depends on X86_32 && PM_SLEEP
  1201. ---help---
  1202. APM is a BIOS specification for saving power using several different
  1203. techniques. This is mostly useful for battery powered laptops with
  1204. APM compliant BIOSes. If you say Y here, the system time will be
  1205. reset after a RESUME operation, the /proc/apm device will provide
  1206. battery status information, and user-space programs will receive
  1207. notification of APM "events" (e.g. battery status change).
  1208. If you select "Y" here, you can disable actual use of the APM
  1209. BIOS by passing the "apm=off" option to the kernel at boot time.
  1210. Note that the APM support is almost completely disabled for
  1211. machines with more than one CPU.
  1212. In order to use APM, you will need supporting software. For location
  1213. and more information, read <file:Documentation/power/pm.txt> and the
  1214. Battery Powered Linux mini-HOWTO, available from
  1215. <http://www.tldp.org/docs.html#howto>.
  1216. This driver does not spin down disk drives (see the hdparm(8)
  1217. manpage ("man 8 hdparm") for that), and it doesn't turn off
  1218. VESA-compliant "green" monitors.
  1219. This driver does not support the TI 4000M TravelMate and the ACER
  1220. 486/DX4/75 because they don't have compliant BIOSes. Many "green"
  1221. desktop machines also don't have compliant BIOSes, and this driver
  1222. may cause those machines to panic during the boot phase.
  1223. Generally, if you don't have a battery in your machine, there isn't
  1224. much point in using this driver and you should say N. If you get
  1225. random kernel OOPSes or reboots that don't seem to be related to
  1226. anything, try disabling/enabling this option (or disabling/enabling
  1227. APM in your BIOS).
  1228. Some other things you should try when experiencing seemingly random,
  1229. "weird" problems:
  1230. 1) make sure that you have enough swap space and that it is
  1231. enabled.
  1232. 2) pass the "no-hlt" option to the kernel
  1233. 3) switch on floating point emulation in the kernel and pass
  1234. the "no387" option to the kernel
  1235. 4) pass the "floppy=nodma" option to the kernel
  1236. 5) pass the "mem=4M" option to the kernel (thereby disabling
  1237. all but the first 4 MB of RAM)
  1238. 6) make sure that the CPU is not over clocked.
  1239. 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
  1240. 8) disable the cache from your BIOS settings
  1241. 9) install a fan for the video card or exchange video RAM
  1242. 10) install a better fan for the CPU
  1243. 11) exchange RAM chips
  1244. 12) exchange the motherboard.
  1245. To compile this driver as a module, choose M here: the
  1246. module will be called apm.
  1247. if APM
  1248. config APM_IGNORE_USER_SUSPEND
  1249. bool "Ignore USER SUSPEND"
  1250. help
  1251. This option will ignore USER SUSPEND requests. On machines with a
  1252. compliant APM BIOS, you want to say N. However, on the NEC Versa M
  1253. series notebooks, it is necessary to say Y because of a BIOS bug.
  1254. config APM_DO_ENABLE
  1255. bool "Enable PM at boot time"
  1256. ---help---
  1257. Enable APM features at boot time. From page 36 of the APM BIOS
  1258. specification: "When disabled, the APM BIOS does not automatically
  1259. power manage devices, enter the Standby State, enter the Suspend
  1260. State, or take power saving steps in response to CPU Idle calls."
  1261. This driver will make CPU Idle calls when Linux is idle (unless this
  1262. feature is turned off -- see "Do CPU IDLE calls", below). This
  1263. should always save battery power, but more complicated APM features
  1264. will be dependent on your BIOS implementation. You may need to turn
  1265. this option off if your computer hangs at boot time when using APM
  1266. support, or if it beeps continuously instead of suspending. Turn
  1267. this off if you have a NEC UltraLite Versa 33/C or a Toshiba
  1268. T400CDT. This is off by default since most machines do fine without
  1269. this feature.
  1270. config APM_CPU_IDLE
  1271. bool "Make CPU Idle calls when idle"
  1272. help
  1273. Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
  1274. On some machines, this can activate improved power savings, such as
  1275. a slowed CPU clock rate, when the machine is idle. These idle calls
  1276. are made after the idle loop has run for some length of time (e.g.,
  1277. 333 mS). On some machines, this will cause a hang at boot time or
  1278. whenever the CPU becomes idle. (On machines with more than one CPU,
  1279. this option does nothing.)
  1280. config APM_DISPLAY_BLANK
  1281. bool "Enable console blanking using APM"
  1282. help
  1283. Enable console blanking using the APM. Some laptops can use this to
  1284. turn off the LCD backlight when the screen blanker of the Linux
  1285. virtual console blanks the screen. Note that this is only used by
  1286. the virtual console screen blanker, and won't turn off the backlight
  1287. when using the X Window system. This also doesn't have anything to
  1288. do with your VESA-compliant power-saving monitor. Further, this
  1289. option doesn't work for all laptops -- it might not turn off your
  1290. backlight at all, or it might print a lot of errors to the console,
  1291. especially if you are using gpm.
  1292. config APM_ALLOW_INTS
  1293. bool "Allow interrupts during APM BIOS calls"
  1294. help
  1295. Normally we disable external interrupts while we are making calls to
  1296. the APM BIOS as a measure to lessen the effects of a badly behaving
  1297. BIOS implementation. The BIOS should reenable interrupts if it
  1298. needs to. Unfortunately, some BIOSes do not -- especially those in
  1299. many of the newer IBM Thinkpads. If you experience hangs when you
  1300. suspend, try setting this to Y. Otherwise, say N.
  1301. config APM_REAL_MODE_POWER_OFF
  1302. bool "Use real mode APM BIOS call to power off"
  1303. help
  1304. Use real mode APM BIOS calls to switch off the computer. This is
  1305. a work-around for a number of buggy BIOSes. Switch this option on if
  1306. your computer crashes instead of powering off properly.
  1307. endif # APM
  1308. source "arch/x86/kernel/cpu/cpufreq/Kconfig"
  1309. source "drivers/cpuidle/Kconfig"
  1310. endmenu
  1311. menu "Bus options (PCI etc.)"
  1312. config PCI
  1313. bool "PCI support"
  1314. default y
  1315. select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC)
  1316. help
  1317. Find out whether you have a PCI motherboard. PCI is the name of a
  1318. bus system, i.e. the way the CPU talks to the other stuff inside
  1319. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1320. VESA. If you have PCI, say Y, otherwise N.
  1321. choice
  1322. prompt "PCI access mode"
  1323. depends on X86_32 && PCI
  1324. default PCI_GOANY
  1325. ---help---
  1326. On PCI systems, the BIOS can be used to detect the PCI devices and
  1327. determine their configuration. However, some old PCI motherboards
  1328. have BIOS bugs and may crash if this is done. Also, some embedded
  1329. PCI-based systems don't have any BIOS at all. Linux can also try to
  1330. detect the PCI hardware directly without using the BIOS.
  1331. With this option, you can specify how Linux should detect the
  1332. PCI devices. If you choose "BIOS", the BIOS will be used,
  1333. if you choose "Direct", the BIOS won't be used, and if you
  1334. choose "MMConfig", then PCI Express MMCONFIG will be used.
  1335. If you choose "Any", the kernel will try MMCONFIG, then the
  1336. direct access method and falls back to the BIOS if that doesn't
  1337. work. If unsure, go with the default, which is "Any".
  1338. config PCI_GOBIOS
  1339. bool "BIOS"
  1340. config PCI_GOMMCONFIG
  1341. bool "MMConfig"
  1342. config PCI_GODIRECT
  1343. bool "Direct"
  1344. config PCI_GOOLPC
  1345. bool "OLPC"
  1346. depends on OLPC
  1347. config PCI_GOANY
  1348. bool "Any"
  1349. endchoice
  1350. config PCI_BIOS
  1351. def_bool y
  1352. depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY)
  1353. # x86-64 doesn't support PCI BIOS access from long mode so always go direct.
  1354. config PCI_DIRECT
  1355. def_bool y
  1356. depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC))
  1357. config PCI_MMCONFIG
  1358. def_bool y
  1359. depends on X86_32 && PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
  1360. config PCI_OLPC
  1361. def_bool y
  1362. depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY)
  1363. config PCI_DOMAINS
  1364. def_bool y
  1365. depends on PCI
  1366. config PCI_MMCONFIG
  1367. bool "Support mmconfig PCI config space access"
  1368. depends on X86_64 && PCI && ACPI
  1369. config DMAR
  1370. bool "Support for DMA Remapping Devices (EXPERIMENTAL)"
  1371. depends on X86_64 && PCI_MSI && ACPI && EXPERIMENTAL
  1372. help
  1373. DMA remapping (DMAR) devices support enables independent address
  1374. translations for Direct Memory Access (DMA) from devices.
  1375. These DMA remapping devices are reported via ACPI tables
  1376. and include PCI device scope covered by these DMA
  1377. remapping devices.
  1378. config DMAR_GFX_WA
  1379. def_bool y
  1380. prompt "Support for Graphics workaround"
  1381. depends on DMAR
  1382. help
  1383. Current Graphics drivers tend to use physical address
  1384. for DMA and avoid using DMA APIs. Setting this config
  1385. option permits the IOMMU driver to set a unity map for
  1386. all the OS-visible memory. Hence the driver can continue
  1387. to use physical addresses for DMA.
  1388. config DMAR_FLOPPY_WA
  1389. def_bool y
  1390. depends on DMAR
  1391. help
  1392. Floppy disk drivers are know to bypass DMA API calls
  1393. thereby failing to work when IOMMU is enabled. This
  1394. workaround will setup a 1:1 mapping for the first
  1395. 16M to make floppy (an ISA device) work.
  1396. source "drivers/pci/pcie/Kconfig"
  1397. source "drivers/pci/Kconfig"
  1398. # x86_64 have no ISA slots, but do have ISA-style DMA.
  1399. config ISA_DMA_API
  1400. def_bool y
  1401. if X86_32
  1402. config ISA
  1403. bool "ISA support"
  1404. depends on !X86_VOYAGER
  1405. help
  1406. Find out whether you have ISA slots on your motherboard. ISA is the
  1407. name of a bus system, i.e. the way the CPU talks to the other stuff
  1408. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1409. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1410. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1411. config EISA
  1412. bool "EISA support"
  1413. depends on ISA
  1414. ---help---
  1415. The Extended Industry Standard Architecture (EISA) bus was
  1416. developed as an open alternative to the IBM MicroChannel bus.
  1417. The EISA bus provided some of the features of the IBM MicroChannel
  1418. bus while maintaining backward compatibility with cards made for
  1419. the older ISA bus. The EISA bus saw limited use between 1988 and
  1420. 1995 when it was made obsolete by the PCI bus.
  1421. Say Y here if you are building a kernel for an EISA-based machine.
  1422. Otherwise, say N.
  1423. source "drivers/eisa/Kconfig"
  1424. config MCA
  1425. bool "MCA support" if !X86_VOYAGER
  1426. default y if X86_VOYAGER
  1427. help
  1428. MicroChannel Architecture is found in some IBM PS/2 machines and
  1429. laptops. It is a bus system similar to PCI or ISA. See
  1430. <file:Documentation/mca.txt> (and especially the web page given
  1431. there) before attempting to build an MCA bus kernel.
  1432. source "drivers/mca/Kconfig"
  1433. config SCx200
  1434. tristate "NatSemi SCx200 support"
  1435. depends on !X86_VOYAGER
  1436. help
  1437. This provides basic support for National Semiconductor's
  1438. (now AMD's) Geode processors. The driver probes for the
  1439. PCI-IDs of several on-chip devices, so its a good dependency
  1440. for other scx200_* drivers.
  1441. If compiled as a module, the driver is named scx200.
  1442. config SCx200HR_TIMER
  1443. tristate "NatSemi SCx200 27MHz High-Resolution Timer Support"
  1444. depends on SCx200 && GENERIC_TIME
  1445. default y
  1446. help
  1447. This driver provides a clocksource built upon the on-chip
  1448. 27MHz high-resolution timer. Its also a workaround for
  1449. NSC Geode SC-1100's buggy TSC, which loses time when the
  1450. processor goes idle (as is done by the scheduler). The
  1451. other workaround is idle=poll boot option.
  1452. config GEODE_MFGPT_TIMER
  1453. def_bool y
  1454. prompt "Geode Multi-Function General Purpose Timer (MFGPT) events"
  1455. depends on MGEODE_LX && GENERIC_TIME && GENERIC_CLOCKEVENTS
  1456. help
  1457. This driver provides a clock event source based on the MFGPT
  1458. timer(s) in the CS5535 and CS5536 companion chip for the geode.
  1459. MFGPTs have a better resolution and max interval than the
  1460. generic PIT, and are suitable for use as high-res timers.
  1461. config OLPC
  1462. bool "One Laptop Per Child support"
  1463. default n
  1464. help
  1465. Add support for detecting the unique features of the OLPC
  1466. XO hardware.
  1467. endif # X86_32
  1468. config K8_NB
  1469. def_bool y
  1470. depends on AGP_AMD64 || (X86_64 && (GART_IOMMU || (PCI && NUMA)))
  1471. source "drivers/pcmcia/Kconfig"
  1472. source "drivers/pci/hotplug/Kconfig"
  1473. endmenu
  1474. menu "Executable file formats / Emulations"
  1475. source "fs/Kconfig.binfmt"
  1476. config IA32_EMULATION
  1477. bool "IA32 Emulation"
  1478. depends on X86_64
  1479. select COMPAT_BINFMT_ELF
  1480. help
  1481. Include code to run 32-bit programs under a 64-bit kernel. You should
  1482. likely turn this on, unless you're 100% sure that you don't have any
  1483. 32-bit programs left.
  1484. config IA32_AOUT
  1485. tristate "IA32 a.out support"
  1486. depends on IA32_EMULATION && ARCH_SUPPORTS_AOUT
  1487. help
  1488. Support old a.out binaries in the 32bit emulation.
  1489. config COMPAT
  1490. def_bool y
  1491. depends on IA32_EMULATION
  1492. config COMPAT_FOR_U64_ALIGNMENT
  1493. def_bool COMPAT
  1494. depends on X86_64
  1495. config SYSVIPC_COMPAT
  1496. def_bool y
  1497. depends on COMPAT && SYSVIPC
  1498. endmenu
  1499. source "net/Kconfig"
  1500. source "drivers/Kconfig"
  1501. source "drivers/firmware/Kconfig"
  1502. source "fs/Kconfig"
  1503. source "arch/x86/Kconfig.debug"
  1504. source "security/Kconfig"
  1505. source "crypto/Kconfig"
  1506. source "arch/x86/kvm/Kconfig"
  1507. source "lib/Kconfig"