Kconfig 42 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config X86
  7. bool
  8. default y
  9. help
  10. This is Linux's home port. Linux was originally native to the Intel
  11. 386, and runs on all the later x86 processors including the Intel
  12. 486, 586, Pentiums, and various instruction-set-compatible chips by
  13. AMD, Cyrix, and others.
  14. config MMU
  15. bool
  16. default y
  17. config SBUS
  18. bool
  19. config UID16
  20. bool
  21. default y
  22. config GENERIC_ISA_DMA
  23. bool
  24. default y
  25. config GENERIC_IOMAP
  26. bool
  27. default y
  28. source "init/Kconfig"
  29. menu "Processor type and features"
  30. choice
  31. prompt "Subarchitecture Type"
  32. default X86_PC
  33. config X86_PC
  34. bool "PC-compatible"
  35. help
  36. Choose this option if your computer is a standard PC or compatible.
  37. config X86_ELAN
  38. bool "AMD Elan"
  39. help
  40. Select this for an AMD Elan processor.
  41. Do not use this option for K6/Athlon/Opteron processors!
  42. If unsure, choose "PC-compatible" instead.
  43. config X86_VOYAGER
  44. bool "Voyager (NCR)"
  45. help
  46. Voyager is an MCA-based 32-way capable SMP architecture proprietary
  47. to NCR Corp. Machine classes 345x/35xx/4100/51xx are Voyager-based.
  48. *** WARNING ***
  49. If you do not specifically know you have a Voyager based machine,
  50. say N here, otherwise the kernel you build will not be bootable.
  51. config X86_NUMAQ
  52. bool "NUMAQ (IBM/Sequent)"
  53. select NUMA
  54. help
  55. This option is used for getting Linux to run on a (IBM/Sequent) NUMA
  56. multiquad box. This changes the way that processors are bootstrapped,
  57. and uses Clustered Logical APIC addressing mode instead of Flat Logical.
  58. You will need a new lynxer.elf file to flash your firmware with - send
  59. email to <Martin.Bligh@us.ibm.com>.
  60. config X86_SUMMIT
  61. bool "Summit/EXA (IBM x440)"
  62. depends on SMP
  63. help
  64. This option is needed for IBM systems that use the Summit/EXA chipset.
  65. In particular, it is needed for the x440.
  66. If you don't have one of these computers, you should say N here.
  67. config X86_BIGSMP
  68. bool "Support for other sub-arch SMP systems with more than 8 CPUs"
  69. depends on SMP
  70. help
  71. This option is needed for the systems that have more than 8 CPUs
  72. and if the system is not of any sub-arch type above.
  73. If you don't have such a system, you should say N here.
  74. config X86_VISWS
  75. bool "SGI 320/540 (Visual Workstation)"
  76. help
  77. The SGI Visual Workstation series is an IA32-based workstation
  78. based on SGI systems chips with some legacy PC hardware attached.
  79. Say Y here to create a kernel to run on the SGI 320 or 540.
  80. A kernel compiled for the Visual Workstation will not run on PCs
  81. and vice versa. See <file:Documentation/sgi-visws.txt> for details.
  82. config X86_GENERICARCH
  83. bool "Generic architecture (Summit, bigsmp, ES7000, default)"
  84. depends on SMP
  85. help
  86. This option compiles in the Summit, bigsmp, ES7000, default subarchitectures.
  87. It is intended for a generic binary kernel.
  88. config X86_ES7000
  89. bool "Support for Unisys ES7000 IA32 series"
  90. depends on SMP
  91. help
  92. Support for Unisys ES7000 systems. Say 'Y' here if this kernel is
  93. supposed to run on an IA32-based Unisys ES7000 system.
  94. Only choose this option if you have such a system, otherwise you
  95. should say N here.
  96. endchoice
  97. config ACPI_SRAT
  98. bool
  99. default y
  100. depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
  101. config X86_SUMMIT_NUMA
  102. bool
  103. default y
  104. depends on NUMA && (X86_SUMMIT || X86_GENERICARCH)
  105. config X86_CYCLONE_TIMER
  106. bool
  107. default y
  108. depends on X86_SUMMIT || X86_GENERICARCH
  109. config ES7000_CLUSTERED_APIC
  110. bool
  111. default y
  112. depends on SMP && X86_ES7000 && MPENTIUMIII
  113. if !X86_ELAN
  114. choice
  115. prompt "Processor family"
  116. default M686
  117. config M386
  118. bool "386"
  119. ---help---
  120. This is the processor type of your CPU. This information is used for
  121. optimizing purposes. In order to compile a kernel that can run on
  122. all x86 CPU types (albeit not optimally fast), you can specify
  123. "386" here.
  124. The kernel will not necessarily run on earlier architectures than
  125. the one you have chosen, e.g. a Pentium optimized kernel will run on
  126. a PPro, but not necessarily on a i486.
  127. Here are the settings recommended for greatest speed:
  128. - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
  129. 486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels
  130. will run on a 386 class machine.
  131. - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
  132. SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
  133. - "586" for generic Pentium CPUs lacking the TSC
  134. (time stamp counter) register.
  135. - "Pentium-Classic" for the Intel Pentium.
  136. - "Pentium-MMX" for the Intel Pentium MMX.
  137. - "Pentium-Pro" for the Intel Pentium Pro.
  138. - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
  139. - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
  140. - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
  141. - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
  142. - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
  143. - "Crusoe" for the Transmeta Crusoe series.
  144. - "Efficeon" for the Transmeta Efficeon series.
  145. - "Winchip-C6" for original IDT Winchip.
  146. - "Winchip-2" for IDT Winchip 2.
  147. - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
  148. - "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
  149. - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
  150. - "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).
  151. If you don't know what to do, choose "386".
  152. config M486
  153. bool "486"
  154. help
  155. Select this for a 486 series processor, either Intel or one of the
  156. compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX,
  157. DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
  158. U5S.
  159. config M586
  160. bool "586/K5/5x86/6x86/6x86MX"
  161. help
  162. Select this for an 586 or 686 series processor such as the AMD K5,
  163. the Cyrix 5x86, 6x86 and 6x86MX. This choice does not
  164. assume the RDTSC (Read Time Stamp Counter) instruction.
  165. config M586TSC
  166. bool "Pentium-Classic"
  167. help
  168. Select this for a Pentium Classic processor with the RDTSC (Read
  169. Time Stamp Counter) instruction for benchmarking.
  170. config M586MMX
  171. bool "Pentium-MMX"
  172. help
  173. Select this for a Pentium with the MMX graphics/multimedia
  174. extended instructions.
  175. config M686
  176. bool "Pentium-Pro"
  177. help
  178. Select this for Intel Pentium Pro chips. This enables the use of
  179. Pentium Pro extended instructions, and disables the init-time guard
  180. against the f00f bug found in earlier Pentiums.
  181. config MPENTIUMII
  182. bool "Pentium-II/Celeron(pre-Coppermine)"
  183. help
  184. Select this for Intel chips based on the Pentium-II and
  185. pre-Coppermine Celeron core. This option enables an unaligned
  186. copy optimization, compiles the kernel with optimization flags
  187. tailored for the chip, and applies any applicable Pentium Pro
  188. optimizations.
  189. config MPENTIUMIII
  190. bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
  191. help
  192. Select this for Intel chips based on the Pentium-III and
  193. Celeron-Coppermine core. This option enables use of some
  194. extended prefetch instructions in addition to the Pentium II
  195. extensions.
  196. config MPENTIUMM
  197. bool "Pentium M"
  198. help
  199. Select this for Intel Pentium M (not Pentium-4 M)
  200. notebook chips.
  201. config MPENTIUM4
  202. bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon"
  203. help
  204. Select this for Intel Pentium 4 chips. This includes the
  205. Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M
  206. (not Pentium M) chips. This option enables compile flags
  207. optimized for the chip, uses the correct cache shift, and
  208. applies any applicable Pentium III optimizations.
  209. config MK6
  210. bool "K6/K6-II/K6-III"
  211. help
  212. Select this for an AMD K6-family processor. Enables use of
  213. some extended instructions, and passes appropriate optimization
  214. flags to GCC.
  215. config MK7
  216. bool "Athlon/Duron/K7"
  217. help
  218. Select this for an AMD Athlon K7-family processor. Enables use of
  219. some extended instructions, and passes appropriate optimization
  220. flags to GCC.
  221. config MK8
  222. bool "Opteron/Athlon64/Hammer/K8"
  223. help
  224. Select this for an AMD Opteron or Athlon64 Hammer-family processor. Enables
  225. use of some extended instructions, and passes appropriate optimization
  226. flags to GCC.
  227. config MCRUSOE
  228. bool "Crusoe"
  229. help
  230. Select this for a Transmeta Crusoe processor. Treats the processor
  231. like a 586 with TSC, and sets some GCC optimization flags (like a
  232. Pentium Pro with no alignment requirements).
  233. config MEFFICEON
  234. bool "Efficeon"
  235. help
  236. Select this for a Transmeta Efficeon processor.
  237. config MWINCHIPC6
  238. bool "Winchip-C6"
  239. help
  240. Select this for an IDT Winchip C6 chip. Linux and GCC
  241. treat this chip as a 586TSC with some extended instructions
  242. and alignment requirements.
  243. config MWINCHIP2
  244. bool "Winchip-2"
  245. help
  246. Select this for an IDT Winchip-2. Linux and GCC
  247. treat this chip as a 586TSC with some extended instructions
  248. and alignment requirements.
  249. config MWINCHIP3D
  250. bool "Winchip-2A/Winchip-3"
  251. help
  252. Select this for an IDT Winchip-2A or 3. Linux and GCC
  253. treat this chip as a 586TSC with some extended instructions
  254. and alignment reqirements. Also enable out of order memory
  255. stores for this CPU, which can increase performance of some
  256. operations.
  257. config MGEODEGX1
  258. bool "GeodeGX1"
  259. help
  260. Select this for a Geode GX1 (Cyrix MediaGX) chip.
  261. config MCYRIXIII
  262. bool "CyrixIII/VIA-C3"
  263. help
  264. Select this for a Cyrix III or C3 chip. Presently Linux and GCC
  265. treat this chip as a generic 586. Whilst the CPU is 686 class,
  266. it lacks the cmov extension which gcc assumes is present when
  267. generating 686 code.
  268. Note that Nehemiah (Model 9) and above will not boot with this
  269. kernel due to them lacking the 3DNow! instructions used in earlier
  270. incarnations of the CPU.
  271. config MVIAC3_2
  272. bool "VIA C3-2 (Nehemiah)"
  273. help
  274. Select this for a VIA C3 "Nehemiah". Selecting this enables usage
  275. of SSE and tells gcc to treat the CPU as a 686.
  276. Note, this kernel will not boot on older (pre model 9) C3s.
  277. endchoice
  278. config X86_GENERIC
  279. bool "Generic x86 support"
  280. help
  281. Instead of just including optimizations for the selected
  282. x86 variant (e.g. PII, Crusoe or Athlon), include some more
  283. generic optimizations as well. This will make the kernel
  284. perform better on x86 CPUs other than that selected.
  285. This is really intended for distributors who need more
  286. generic optimizations.
  287. endif
  288. #
  289. # Define implied options from the CPU selection here
  290. #
  291. config X86_CMPXCHG
  292. bool
  293. depends on !M386
  294. default y
  295. config X86_XADD
  296. bool
  297. depends on !M386
  298. default y
  299. config X86_L1_CACHE_SHIFT
  300. int
  301. default "7" if MPENTIUM4 || X86_GENERIC
  302. default "4" if X86_ELAN || M486 || M386
  303. default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODEGX1
  304. default "6" if MK7 || MK8 || MPENTIUMM
  305. config RWSEM_GENERIC_SPINLOCK
  306. bool
  307. depends on M386
  308. default y
  309. config RWSEM_XCHGADD_ALGORITHM
  310. bool
  311. depends on !M386
  312. default y
  313. config GENERIC_CALIBRATE_DELAY
  314. bool
  315. default y
  316. config X86_PPRO_FENCE
  317. bool
  318. depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1
  319. default y
  320. config X86_F00F_BUG
  321. bool
  322. depends on M586MMX || M586TSC || M586 || M486 || M386
  323. default y
  324. config X86_WP_WORKS_OK
  325. bool
  326. depends on !M386
  327. default y
  328. config X86_INVLPG
  329. bool
  330. depends on !M386
  331. default y
  332. config X86_BSWAP
  333. bool
  334. depends on !M386
  335. default y
  336. config X86_POPAD_OK
  337. bool
  338. depends on !M386
  339. default y
  340. config X86_ALIGNMENT_16
  341. bool
  342. depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
  343. default y
  344. config X86_GOOD_APIC
  345. bool
  346. depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON
  347. default y
  348. config X86_INTEL_USERCOPY
  349. bool
  350. depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON
  351. default y
  352. config X86_USE_PPRO_CHECKSUM
  353. bool
  354. depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON
  355. default y
  356. config X86_USE_3DNOW
  357. bool
  358. depends on MCYRIXIII || MK7
  359. default y
  360. config X86_OOSTORE
  361. bool
  362. depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
  363. default y
  364. config HPET_TIMER
  365. bool "HPET Timer Support"
  366. help
  367. This enables the use of the HPET for the kernel's internal timer.
  368. HPET is the next generation timer replacing legacy 8254s.
  369. You can safely choose Y here. However, HPET will only be
  370. activated if the platform and the BIOS support this feature.
  371. Otherwise the 8254 will be used for timing services.
  372. Choose N to continue using the legacy 8254 timer.
  373. config HPET_EMULATE_RTC
  374. bool "Provide RTC interrupt"
  375. depends on HPET_TIMER && RTC=y
  376. config SMP
  377. bool "Symmetric multi-processing support"
  378. ---help---
  379. This enables support for systems with more than one CPU. If you have
  380. a system with only one CPU, like most personal computers, say N. If
  381. you have a system with more than one CPU, say Y.
  382. If you say N here, the kernel will run on single and multiprocessor
  383. machines, but will use only one CPU of a multiprocessor machine. If
  384. you say Y here, the kernel will run on many, but not all,
  385. singleprocessor machines. On a singleprocessor machine, the kernel
  386. will run faster if you say N here.
  387. Note that if you say Y here and choose architecture "586" or
  388. "Pentium" under "Processor family", the kernel will not work on 486
  389. architectures. Similarly, multiprocessor kernels for the "PPro"
  390. architecture may not work on all Pentium based boards.
  391. People using multiprocessor machines who say Y here should also say
  392. Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
  393. Management" code will be disabled if you say Y here.
  394. See also the <file:Documentation/smp.txt>,
  395. <file:Documentation/i386/IO-APIC.txt>,
  396. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  397. <http://www.tldp.org/docs.html#howto>.
  398. If you don't know what to do here, say N.
  399. config NR_CPUS
  400. int "Maximum number of CPUs (2-255)"
  401. range 2 255
  402. depends on SMP
  403. default "32" if X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000
  404. default "8"
  405. help
  406. This allows you to specify the maximum number of CPUs which this
  407. kernel will support. The maximum supported value is 255 and the
  408. minimum value which makes sense is 2.
  409. This is purely to save memory - each supported CPU adds
  410. approximately eight kilobytes to the kernel image.
  411. config SCHED_SMT
  412. bool "SMT (Hyperthreading) scheduler support"
  413. depends on SMP
  414. default off
  415. help
  416. SMT scheduler support improves the CPU scheduler's decision making
  417. when dealing with Intel Pentium 4 chips with HyperThreading at a
  418. cost of slightly increased overhead in some places. If unsure say
  419. N here.
  420. source "kernel/Kconfig.preempt"
  421. config X86_UP_APIC
  422. bool "Local APIC support on uniprocessors"
  423. depends on !SMP && !(X86_VISWS || X86_VOYAGER)
  424. help
  425. A local APIC (Advanced Programmable Interrupt Controller) is an
  426. integrated interrupt controller in the CPU. If you have a single-CPU
  427. system which has a processor with a local APIC, you can say Y here to
  428. enable and use it. If you say Y here even though your machine doesn't
  429. have a local APIC, then the kernel will still run with no slowdown at
  430. all. The local APIC supports CPU-generated self-interrupts (timer,
  431. performance counters), and the NMI watchdog which detects hard
  432. lockups.
  433. config X86_UP_IOAPIC
  434. bool "IO-APIC support on uniprocessors"
  435. depends on X86_UP_APIC
  436. help
  437. An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an
  438. SMP-capable replacement for PC-style interrupt controllers. Most
  439. SMP systems and many recent uniprocessor systems have one.
  440. If you have a single-CPU system with an IO-APIC, you can say Y here
  441. to use it. If you say Y here even though your machine doesn't have
  442. an IO-APIC, then the kernel will still run with no slowdown at all.
  443. config X86_LOCAL_APIC
  444. bool
  445. depends on X86_UP_APIC || ((X86_VISWS || SMP) && !X86_VOYAGER)
  446. default y
  447. config X86_IO_APIC
  448. bool
  449. depends on X86_UP_IOAPIC || (SMP && !(X86_VISWS || X86_VOYAGER))
  450. default y
  451. config X86_VISWS_APIC
  452. bool
  453. depends on X86_VISWS
  454. default y
  455. config X86_TSC
  456. bool
  457. depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1) && !X86_NUMAQ
  458. default y
  459. config X86_MCE
  460. bool "Machine Check Exception"
  461. depends on !X86_VOYAGER
  462. ---help---
  463. Machine Check Exception support allows the processor to notify the
  464. kernel if it detects a problem (e.g. overheating, component failure).
  465. The action the kernel takes depends on the severity of the problem,
  466. ranging from a warning message on the console, to halting the machine.
  467. Your processor must be a Pentium or newer to support this - check the
  468. flags in /proc/cpuinfo for mce. Note that some older Pentium systems
  469. have a design flaw which leads to false MCE events - hence MCE is
  470. disabled on all P5 processors, unless explicitly enabled with "mce"
  471. as a boot argument. Similarly, if MCE is built in and creates a
  472. problem on some new non-standard machine, you can boot with "nomce"
  473. to disable it. MCE support simply ignores non-MCE processors like
  474. the 386 and 486, so nearly everyone can say Y here.
  475. config X86_MCE_NONFATAL
  476. tristate "Check for non-fatal errors on AMD Athlon/Duron / Intel Pentium 4"
  477. depends on X86_MCE
  478. help
  479. Enabling this feature starts a timer that triggers every 5 seconds which
  480. will look at the machine check registers to see if anything happened.
  481. Non-fatal problems automatically get corrected (but still logged).
  482. Disable this if you don't want to see these messages.
  483. Seeing the messages this option prints out may be indicative of dying hardware,
  484. or out-of-spec (ie, overclocked) hardware.
  485. This option only does something on certain CPUs.
  486. (AMD Athlon/Duron and Intel Pentium 4)
  487. config X86_MCE_P4THERMAL
  488. bool "check for P4 thermal throttling interrupt."
  489. depends on X86_MCE && (X86_UP_APIC || SMP) && !X86_VISWS
  490. help
  491. Enabling this feature will cause a message to be printed when the P4
  492. enters thermal throttling.
  493. config TOSHIBA
  494. tristate "Toshiba Laptop support"
  495. ---help---
  496. This adds a driver to safely access the System Management Mode of
  497. the CPU on Toshiba portables with a genuine Toshiba BIOS. It does
  498. not work on models with a Phoenix BIOS. The System Management Mode
  499. is used to set the BIOS and power saving options on Toshiba portables.
  500. For information on utilities to make use of this driver see the
  501. Toshiba Linux utilities web site at:
  502. <http://www.buzzard.org.uk/toshiba/>.
  503. Say Y if you intend to run this kernel on a Toshiba portable.
  504. Say N otherwise.
  505. config I8K
  506. tristate "Dell laptop support"
  507. ---help---
  508. This adds a driver to safely access the System Management Mode
  509. of the CPU on the Dell Inspiron 8000. The System Management Mode
  510. is used to read cpu temperature and cooling fan status and to
  511. control the fans on the I8K portables.
  512. This driver has been tested only on the Inspiron 8000 but it may
  513. also work with other Dell laptops. You can force loading on other
  514. models by passing the parameter `force=1' to the module. Use at
  515. your own risk.
  516. For information on utilities to make use of this driver see the
  517. I8K Linux utilities web site at:
  518. <http://people.debian.org/~dz/i8k/>
  519. Say Y if you intend to run this kernel on a Dell Inspiron 8000.
  520. Say N otherwise.
  521. config X86_REBOOTFIXUPS
  522. bool "Enable X86 board specific fixups for reboot"
  523. depends on X86
  524. default n
  525. ---help---
  526. This enables chipset and/or board specific fixups to be done
  527. in order to get reboot to work correctly. This is only needed on
  528. some combinations of hardware and BIOS. The symptom, for which
  529. this config is intended, is when reboot ends with a stalled/hung
  530. system.
  531. Currently, the only fixup is for the Geode GX1/CS5530A/TROM2.1.
  532. combination.
  533. Say Y if you want to enable the fixup. Currently, it's safe to
  534. enable this option even if you don't need it.
  535. Say N otherwise.
  536. config MICROCODE
  537. tristate "/dev/cpu/microcode - Intel IA32 CPU microcode support"
  538. ---help---
  539. If you say Y here and also to "/dev file system support" in the
  540. 'File systems' section, you will be able to update the microcode on
  541. Intel processors in the IA32 family, e.g. Pentium Pro, Pentium II,
  542. Pentium III, Pentium 4, Xeon etc. You will obviously need the
  543. actual microcode binary data itself which is not shipped with the
  544. Linux kernel.
  545. For latest news and information on obtaining all the required
  546. ingredients for this driver, check:
  547. <http://www.urbanmyth.org/microcode/>.
  548. To compile this driver as a module, choose M here: the
  549. module will be called microcode.
  550. config X86_MSR
  551. tristate "/dev/cpu/*/msr - Model-specific register support"
  552. help
  553. This device gives privileged processes access to the x86
  554. Model-Specific Registers (MSRs). It is a character device with
  555. major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr.
  556. MSR accesses are directed to a specific CPU on multi-processor
  557. systems.
  558. config X86_CPUID
  559. tristate "/dev/cpu/*/cpuid - CPU information support"
  560. help
  561. This device gives processes access to the x86 CPUID instruction to
  562. be executed on a specific processor. It is a character device
  563. with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
  564. /dev/cpu/31/cpuid.
  565. source "drivers/firmware/Kconfig"
  566. choice
  567. prompt "High Memory Support"
  568. default NOHIGHMEM
  569. config NOHIGHMEM
  570. bool "off"
  571. ---help---
  572. Linux can use up to 64 Gigabytes of physical memory on x86 systems.
  573. However, the address space of 32-bit x86 processors is only 4
  574. Gigabytes large. That means that, if you have a large amount of
  575. physical memory, not all of it can be "permanently mapped" by the
  576. kernel. The physical memory that's not permanently mapped is called
  577. "high memory".
  578. If you are compiling a kernel which will never run on a machine with
  579. more than 1 Gigabyte total physical RAM, answer "off" here (default
  580. choice and suitable for most users). This will result in a "3GB/1GB"
  581. split: 3GB are mapped so that each process sees a 3GB virtual memory
  582. space and the remaining part of the 4GB virtual memory space is used
  583. by the kernel to permanently map as much physical memory as
  584. possible.
  585. If the machine has between 1 and 4 Gigabytes physical RAM, then
  586. answer "4GB" here.
  587. If more than 4 Gigabytes is used then answer "64GB" here. This
  588. selection turns Intel PAE (Physical Address Extension) mode on.
  589. PAE implements 3-level paging on IA32 processors. PAE is fully
  590. supported by Linux, PAE mode is implemented on all recent Intel
  591. processors (Pentium Pro and better). NOTE: If you say "64GB" here,
  592. then the kernel will not boot on CPUs that don't support PAE!
  593. The actual amount of total physical memory will either be
  594. auto detected or can be forced by using a kernel command line option
  595. such as "mem=256M". (Try "man bootparam" or see the documentation of
  596. your boot loader (lilo or loadlin) about how to pass options to the
  597. kernel at boot time.)
  598. If unsure, say "off".
  599. config HIGHMEM4G
  600. bool "4GB"
  601. help
  602. Select this if you have a 32-bit processor and between 1 and 4
  603. gigabytes of physical RAM.
  604. config HIGHMEM64G
  605. bool "64GB"
  606. help
  607. Select this if you have a 32-bit processor and more than 4
  608. gigabytes of physical RAM.
  609. endchoice
  610. config HIGHMEM
  611. bool
  612. depends on HIGHMEM64G || HIGHMEM4G
  613. default y
  614. config X86_PAE
  615. bool
  616. depends on HIGHMEM64G
  617. default y
  618. # Common NUMA Features
  619. config NUMA
  620. bool "Numa Memory Allocation and Scheduler Support"
  621. depends on SMP && HIGHMEM64G && (X86_NUMAQ || X86_GENERICARCH || (X86_SUMMIT && ACPI))
  622. default n if X86_PC
  623. default y if (X86_NUMAQ || X86_SUMMIT)
  624. # Need comments to help the hapless user trying to turn on NUMA support
  625. comment "NUMA (NUMA-Q) requires SMP, 64GB highmem support"
  626. depends on X86_NUMAQ && (!HIGHMEM64G || !SMP)
  627. comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI"
  628. depends on X86_SUMMIT && (!HIGHMEM64G || !ACPI)
  629. config HAVE_ARCH_BOOTMEM_NODE
  630. bool
  631. depends on NUMA
  632. default y
  633. config ARCH_HAVE_MEMORY_PRESENT
  634. bool
  635. depends on DISCONTIGMEM
  636. default y
  637. config NEED_NODE_MEMMAP_SIZE
  638. bool
  639. depends on DISCONTIGMEM || SPARSEMEM
  640. default y
  641. config HAVE_ARCH_ALLOC_REMAP
  642. bool
  643. depends on NUMA
  644. default y
  645. config ARCH_DISCONTIGMEM_ENABLE
  646. def_bool y
  647. depends on NUMA
  648. config ARCH_DISCONTIGMEM_DEFAULT
  649. def_bool y
  650. depends on NUMA
  651. config ARCH_SPARSEMEM_ENABLE
  652. def_bool y
  653. depends on NUMA
  654. config ARCH_SELECT_MEMORY_MODEL
  655. def_bool y
  656. depends on ARCH_SPARSEMEM_ENABLE
  657. source "mm/Kconfig"
  658. config HAVE_ARCH_EARLY_PFN_TO_NID
  659. bool
  660. default y
  661. depends on NUMA
  662. config HIGHPTE
  663. bool "Allocate 3rd-level pagetables from highmem"
  664. depends on HIGHMEM4G || HIGHMEM64G
  665. help
  666. The VM uses one page table entry for each page of physical memory.
  667. For systems with a lot of RAM, this can be wasteful of precious
  668. low memory. Setting this option will put user-space page table
  669. entries in high memory.
  670. config MATH_EMULATION
  671. bool "Math emulation"
  672. ---help---
  673. Linux can emulate a math coprocessor (used for floating point
  674. operations) if you don't have one. 486DX and Pentium processors have
  675. a math coprocessor built in, 486SX and 386 do not, unless you added
  676. a 487DX or 387, respectively. (The messages during boot time can
  677. give you some hints here ["man dmesg"].) Everyone needs either a
  678. coprocessor or this emulation.
  679. If you don't have a math coprocessor, you need to say Y here; if you
  680. say Y here even though you have a coprocessor, the coprocessor will
  681. be used nevertheless. (This behavior can be changed with the kernel
  682. command line option "no387", which comes handy if your coprocessor
  683. is broken. Try "man bootparam" or see the documentation of your boot
  684. loader (lilo or loadlin) about how to pass options to the kernel at
  685. boot time.) This means that it is a good idea to say Y here if you
  686. intend to use this kernel on different machines.
  687. More information about the internals of the Linux math coprocessor
  688. emulation can be found in <file:arch/i386/math-emu/README>.
  689. If you are not sure, say Y; apart from resulting in a 66 KB bigger
  690. kernel, it won't hurt.
  691. config MTRR
  692. bool "MTRR (Memory Type Range Register) support"
  693. ---help---
  694. On Intel P6 family processors (Pentium Pro, Pentium II and later)
  695. the Memory Type Range Registers (MTRRs) may be used to control
  696. processor access to memory ranges. This is most useful if you have
  697. a video (VGA) card on a PCI or AGP bus. Enabling write-combining
  698. allows bus write transfers to be combined into a larger transfer
  699. before bursting over the PCI/AGP bus. This can increase performance
  700. of image write operations 2.5 times or more. Saying Y here creates a
  701. /proc/mtrr file which may be used to manipulate your processor's
  702. MTRRs. Typically the X server should use this.
  703. This code has a reasonably generic interface so that similar
  704. control registers on other processors can be easily supported
  705. as well:
  706. The Cyrix 6x86, 6x86MX and M II processors have Address Range
  707. Registers (ARRs) which provide a similar functionality to MTRRs. For
  708. these, the ARRs are used to emulate the MTRRs.
  709. The AMD K6-2 (stepping 8 and above) and K6-3 processors have two
  710. MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing
  711. write-combining. All of these processors are supported by this code
  712. and it makes sense to say Y here if you have one of them.
  713. Saying Y here also fixes a problem with buggy SMP BIOSes which only
  714. set the MTRRs for the boot CPU and not for the secondary CPUs. This
  715. can lead to all sorts of problems, so it's good to say Y here.
  716. You can safely say Y even if your machine doesn't have MTRRs, you'll
  717. just add about 9 KB to your kernel.
  718. See <file:Documentation/mtrr.txt> for more information.
  719. config EFI
  720. bool "Boot from EFI support (EXPERIMENTAL)"
  721. depends on ACPI
  722. default n
  723. ---help---
  724. This enables the the kernel to boot on EFI platforms using
  725. system configuration information passed to it from the firmware.
  726. This also enables the kernel to use any EFI runtime services that are
  727. available (such as the EFI variable services).
  728. This option is only useful on systems that have EFI firmware
  729. and will result in a kernel image that is ~8k larger. In addition,
  730. you must use the latest ELILO loader available at
  731. <http://elilo.sourceforge.net> in order to take advantage of
  732. kernel initialization using EFI information (neither GRUB nor LILO know
  733. anything about EFI). However, even with this option, the resultant
  734. kernel should continue to boot on existing non-EFI platforms.
  735. config IRQBALANCE
  736. bool "Enable kernel irq balancing"
  737. depends on SMP && X86_IO_APIC
  738. default y
  739. help
  740. The default yes will allow the kernel to do irq load balancing.
  741. Saying no will keep the kernel from doing irq load balancing.
  742. config HAVE_DEC_LOCK
  743. bool
  744. depends on (SMP || PREEMPT) && X86_CMPXCHG
  745. default y
  746. # turning this on wastes a bunch of space.
  747. # Summit needs it only when NUMA is on
  748. config BOOT_IOREMAP
  749. bool
  750. depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA) || (X86 && EFI))
  751. default y
  752. config REGPARM
  753. bool "Use register arguments (EXPERIMENTAL)"
  754. depends on EXPERIMENTAL
  755. default n
  756. help
  757. Compile the kernel with -mregparm=3. This uses a different ABI
  758. and passes the first three arguments of a function call in registers.
  759. This will probably break binary only modules.
  760. This feature is only enabled for gcc-3.0 and later - earlier compilers
  761. generate incorrect output with certain kernel constructs when
  762. -mregparm=3 is used.
  763. config SECCOMP
  764. bool "Enable seccomp to safely compute untrusted bytecode"
  765. depends on PROC_FS
  766. default y
  767. help
  768. This kernel feature is useful for number crunching applications
  769. that may need to compute untrusted bytecode during their
  770. execution. By using pipes or other transports made available to
  771. the process as file descriptors supporting the read/write
  772. syscalls, it's possible to isolate those applications in
  773. their own address space using seccomp. Once seccomp is
  774. enabled via /proc/<pid>/seccomp, it cannot be disabled
  775. and the task is only allowed to execute a few safe syscalls
  776. defined by each seccomp mode.
  777. If unsure, say Y. Only embedded should say N here.
  778. source kernel/Kconfig.hz
  779. config PHYSICAL_START
  780. hex "Physical address where the kernel is loaded" if EMBEDDED
  781. default "0x100000"
  782. help
  783. This gives the physical address where the kernel is loaded.
  784. Primarily used in the case of kexec on panic where the
  785. fail safe kernel needs to run at a different address than
  786. the panic-ed kernel.
  787. Don't change this unless you know what you are doing.
  788. config KEXEC
  789. bool "kexec system call (EXPERIMENTAL)"
  790. depends on EXPERIMENTAL
  791. help
  792. kexec is a system call that implements the ability to shutdown your
  793. current kernel, and to start another kernel. It is like a reboot
  794. but it is indepedent of the system firmware. And like a reboot
  795. you can start any kernel with it, not just Linux.
  796. The name comes from the similiarity to the exec system call.
  797. It is an ongoing process to be certain the hardware in a machine
  798. is properly shutdown, so do not be surprised if this code does not
  799. initially work for you. It may help to enable device hotplugging
  800. support. As of this writing the exact hardware interface is
  801. strongly in flux, so no good recommendation can be made.
  802. config CRASH_DUMP
  803. bool "kernel crash dumps (EXPERIMENTAL)"
  804. depends on EMBEDDED
  805. depends on EXPERIMENTAL
  806. depends on HIGHMEM
  807. help
  808. Generate crash dump after being started by kexec.
  809. endmenu
  810. menu "Power management options (ACPI, APM)"
  811. depends on !X86_VOYAGER
  812. source kernel/power/Kconfig
  813. source "drivers/acpi/Kconfig"
  814. menu "APM (Advanced Power Management) BIOS Support"
  815. depends on PM && !X86_VISWS
  816. config APM
  817. tristate "APM (Advanced Power Management) BIOS support"
  818. depends on PM
  819. ---help---
  820. APM is a BIOS specification for saving power using several different
  821. techniques. This is mostly useful for battery powered laptops with
  822. APM compliant BIOSes. If you say Y here, the system time will be
  823. reset after a RESUME operation, the /proc/apm device will provide
  824. battery status information, and user-space programs will receive
  825. notification of APM "events" (e.g. battery status change).
  826. If you select "Y" here, you can disable actual use of the APM
  827. BIOS by passing the "apm=off" option to the kernel at boot time.
  828. Note that the APM support is almost completely disabled for
  829. machines with more than one CPU.
  830. In order to use APM, you will need supporting software. For location
  831. and more information, read <file:Documentation/pm.txt> and the
  832. Battery Powered Linux mini-HOWTO, available from
  833. <http://www.tldp.org/docs.html#howto>.
  834. This driver does not spin down disk drives (see the hdparm(8)
  835. manpage ("man 8 hdparm") for that), and it doesn't turn off
  836. VESA-compliant "green" monitors.
  837. This driver does not support the TI 4000M TravelMate and the ACER
  838. 486/DX4/75 because they don't have compliant BIOSes. Many "green"
  839. desktop machines also don't have compliant BIOSes, and this driver
  840. may cause those machines to panic during the boot phase.
  841. Generally, if you don't have a battery in your machine, there isn't
  842. much point in using this driver and you should say N. If you get
  843. random kernel OOPSes or reboots that don't seem to be related to
  844. anything, try disabling/enabling this option (or disabling/enabling
  845. APM in your BIOS).
  846. Some other things you should try when experiencing seemingly random,
  847. "weird" problems:
  848. 1) make sure that you have enough swap space and that it is
  849. enabled.
  850. 2) pass the "no-hlt" option to the kernel
  851. 3) switch on floating point emulation in the kernel and pass
  852. the "no387" option to the kernel
  853. 4) pass the "floppy=nodma" option to the kernel
  854. 5) pass the "mem=4M" option to the kernel (thereby disabling
  855. all but the first 4 MB of RAM)
  856. 6) make sure that the CPU is not over clocked.
  857. 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/>
  858. 8) disable the cache from your BIOS settings
  859. 9) install a fan for the video card or exchange video RAM
  860. 10) install a better fan for the CPU
  861. 11) exchange RAM chips
  862. 12) exchange the motherboard.
  863. To compile this driver as a module, choose M here: the
  864. module will be called apm.
  865. config APM_IGNORE_USER_SUSPEND
  866. bool "Ignore USER SUSPEND"
  867. depends on APM
  868. help
  869. This option will ignore USER SUSPEND requests. On machines with a
  870. compliant APM BIOS, you want to say N. However, on the NEC Versa M
  871. series notebooks, it is necessary to say Y because of a BIOS bug.
  872. config APM_DO_ENABLE
  873. bool "Enable PM at boot time"
  874. depends on APM
  875. ---help---
  876. Enable APM features at boot time. From page 36 of the APM BIOS
  877. specification: "When disabled, the APM BIOS does not automatically
  878. power manage devices, enter the Standby State, enter the Suspend
  879. State, or take power saving steps in response to CPU Idle calls."
  880. This driver will make CPU Idle calls when Linux is idle (unless this
  881. feature is turned off -- see "Do CPU IDLE calls", below). This
  882. should always save battery power, but more complicated APM features
  883. will be dependent on your BIOS implementation. You may need to turn
  884. this option off if your computer hangs at boot time when using APM
  885. support, or if it beeps continuously instead of suspending. Turn
  886. this off if you have a NEC UltraLite Versa 33/C or a Toshiba
  887. T400CDT. This is off by default since most machines do fine without
  888. this feature.
  889. config APM_CPU_IDLE
  890. bool "Make CPU Idle calls when idle"
  891. depends on APM
  892. help
  893. Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop.
  894. On some machines, this can activate improved power savings, such as
  895. a slowed CPU clock rate, when the machine is idle. These idle calls
  896. are made after the idle loop has run for some length of time (e.g.,
  897. 333 mS). On some machines, this will cause a hang at boot time or
  898. whenever the CPU becomes idle. (On machines with more than one CPU,
  899. this option does nothing.)
  900. config APM_DISPLAY_BLANK
  901. bool "Enable console blanking using APM"
  902. depends on APM
  903. help
  904. Enable console blanking using the APM. Some laptops can use this to
  905. turn off the LCD backlight when the screen blanker of the Linux
  906. virtual console blanks the screen. Note that this is only used by
  907. the virtual console screen blanker, and won't turn off the backlight
  908. when using the X Window system. This also doesn't have anything to
  909. do with your VESA-compliant power-saving monitor. Further, this
  910. option doesn't work for all laptops -- it might not turn off your
  911. backlight at all, or it might print a lot of errors to the console,
  912. especially if you are using gpm.
  913. config APM_RTC_IS_GMT
  914. bool "RTC stores time in GMT"
  915. depends on APM
  916. help
  917. Say Y here if your RTC (Real Time Clock a.k.a. hardware clock)
  918. stores the time in GMT (Greenwich Mean Time). Say N if your RTC
  919. stores localtime.
  920. It is in fact recommended to store GMT in your RTC, because then you
  921. don't have to worry about daylight savings time changes. The only
  922. reason not to use GMT in your RTC is if you also run a broken OS
  923. that doesn't understand GMT.
  924. config APM_ALLOW_INTS
  925. bool "Allow interrupts during APM BIOS calls"
  926. depends on APM
  927. help
  928. Normally we disable external interrupts while we are making calls to
  929. the APM BIOS as a measure to lessen the effects of a badly behaving
  930. BIOS implementation. The BIOS should reenable interrupts if it
  931. needs to. Unfortunately, some BIOSes do not -- especially those in
  932. many of the newer IBM Thinkpads. If you experience hangs when you
  933. suspend, try setting this to Y. Otherwise, say N.
  934. config APM_REAL_MODE_POWER_OFF
  935. bool "Use real mode APM BIOS call to power off"
  936. depends on APM
  937. help
  938. Use real mode APM BIOS calls to switch off the computer. This is
  939. a work-around for a number of buggy BIOSes. Switch this option on if
  940. your computer crashes instead of powering off properly.
  941. endmenu
  942. source "arch/i386/kernel/cpu/cpufreq/Kconfig"
  943. endmenu
  944. menu "Bus options (PCI, PCMCIA, EISA, MCA, ISA)"
  945. config PCI
  946. bool "PCI support" if !X86_VISWS
  947. depends on !X86_VOYAGER
  948. default y if X86_VISWS
  949. help
  950. Find out whether you have a PCI motherboard. PCI is the name of a
  951. bus system, i.e. the way the CPU talks to the other stuff inside
  952. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  953. VESA. If you have PCI, say Y, otherwise N.
  954. The PCI-HOWTO, available from
  955. <http://www.tldp.org/docs.html#howto>, contains valuable
  956. information about which PCI hardware does work under Linux and which
  957. doesn't.
  958. choice
  959. prompt "PCI access mode"
  960. depends on PCI && !X86_VISWS
  961. default PCI_GOANY
  962. ---help---
  963. On PCI systems, the BIOS can be used to detect the PCI devices and
  964. determine their configuration. However, some old PCI motherboards
  965. have BIOS bugs and may crash if this is done. Also, some embedded
  966. PCI-based systems don't have any BIOS at all. Linux can also try to
  967. detect the PCI hardware directly without using the BIOS.
  968. With this option, you can specify how Linux should detect the
  969. PCI devices. If you choose "BIOS", the BIOS will be used,
  970. if you choose "Direct", the BIOS won't be used, and if you
  971. choose "MMConfig", then PCI Express MMCONFIG will be used.
  972. If you choose "Any", the kernel will try MMCONFIG, then the
  973. direct access method and falls back to the BIOS if that doesn't
  974. work. If unsure, go with the default, which is "Any".
  975. config PCI_GOBIOS
  976. bool "BIOS"
  977. config PCI_GOMMCONFIG
  978. bool "MMConfig"
  979. config PCI_GODIRECT
  980. bool "Direct"
  981. config PCI_GOANY
  982. bool "Any"
  983. endchoice
  984. config PCI_BIOS
  985. bool
  986. depends on !X86_VISWS && PCI && (PCI_GOBIOS || PCI_GOANY)
  987. default y
  988. config PCI_DIRECT
  989. bool
  990. depends on PCI && ((PCI_GODIRECT || PCI_GOANY) || X86_VISWS)
  991. default y
  992. config PCI_MMCONFIG
  993. bool
  994. depends on PCI && ACPI && (PCI_GOMMCONFIG || PCI_GOANY)
  995. select ACPI_BOOT
  996. default y
  997. source "drivers/pci/pcie/Kconfig"
  998. source "drivers/pci/Kconfig"
  999. config ISA_DMA_API
  1000. bool
  1001. default y
  1002. config ISA
  1003. bool "ISA support"
  1004. depends on !(X86_VOYAGER || X86_VISWS)
  1005. help
  1006. Find out whether you have ISA slots on your motherboard. ISA is the
  1007. name of a bus system, i.e. the way the CPU talks to the other stuff
  1008. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1009. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1010. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1011. config EISA
  1012. bool "EISA support"
  1013. depends on ISA
  1014. ---help---
  1015. The Extended Industry Standard Architecture (EISA) bus was
  1016. developed as an open alternative to the IBM MicroChannel bus.
  1017. The EISA bus provided some of the features of the IBM MicroChannel
  1018. bus while maintaining backward compatibility with cards made for
  1019. the older ISA bus. The EISA bus saw limited use between 1988 and
  1020. 1995 when it was made obsolete by the PCI bus.
  1021. Say Y here if you are building a kernel for an EISA-based machine.
  1022. Otherwise, say N.
  1023. source "drivers/eisa/Kconfig"
  1024. config MCA
  1025. bool "MCA support" if !(X86_VISWS || X86_VOYAGER)
  1026. default y if X86_VOYAGER
  1027. help
  1028. MicroChannel Architecture is found in some IBM PS/2 machines and
  1029. laptops. It is a bus system similar to PCI or ISA. See
  1030. <file:Documentation/mca.txt> (and especially the web page given
  1031. there) before attempting to build an MCA bus kernel.
  1032. source "drivers/mca/Kconfig"
  1033. config SCx200
  1034. tristate "NatSemi SCx200 support"
  1035. depends on !X86_VOYAGER
  1036. help
  1037. This provides basic support for the National Semiconductor SCx200
  1038. processor. Right now this is just a driver for the GPIO pins.
  1039. If you don't know what to do here, say N.
  1040. This support is also available as a module. If compiled as a
  1041. module, it will be called scx200.
  1042. config HOTPLUG_CPU
  1043. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1044. depends on SMP && HOTPLUG && EXPERIMENTAL
  1045. ---help---
  1046. Say Y here to experiment with turning CPUs off and on. CPUs
  1047. can be controlled through /sys/devices/system/cpu.
  1048. Say N.
  1049. source "drivers/pcmcia/Kconfig"
  1050. source "drivers/pci/hotplug/Kconfig"
  1051. endmenu
  1052. menu "Executable file formats"
  1053. source "fs/Kconfig.binfmt"
  1054. endmenu
  1055. source "drivers/Kconfig"
  1056. source "fs/Kconfig"
  1057. source "arch/i386/oprofile/Kconfig"
  1058. source "arch/i386/Kconfig.debug"
  1059. source "security/Kconfig"
  1060. source "crypto/Kconfig"
  1061. source "lib/Kconfig"
  1062. #
  1063. # Use the generic interrupt handling code in kernel/irq/:
  1064. #
  1065. config GENERIC_HARDIRQS
  1066. bool
  1067. default y
  1068. config GENERIC_IRQ_PROBE
  1069. bool
  1070. default y
  1071. config X86_SMP
  1072. bool
  1073. depends on SMP && !X86_VOYAGER
  1074. default y
  1075. config X86_HT
  1076. bool
  1077. depends on SMP && !(X86_VISWS || X86_VOYAGER)
  1078. default y
  1079. config X86_BIOS_REBOOT
  1080. bool
  1081. depends on !(X86_VISWS || X86_VOYAGER)
  1082. default y
  1083. config X86_TRAMPOLINE
  1084. bool
  1085. depends on X86_SMP || (X86_VOYAGER && SMP)
  1086. default y
  1087. config PC
  1088. bool
  1089. depends on X86 && !EMBEDDED
  1090. default y