Kconfig 21 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700
  1. # SPDX-License-Identifier: GPL-2.0
  2. config ALPHA
  3. bool
  4. default y
  5. select ARCH_MIGHT_HAVE_PC_PARPORT
  6. select ARCH_MIGHT_HAVE_PC_SERIO
  7. select ARCH_NO_PREEMPT
  8. select ARCH_NO_SG_CHAIN
  9. select ARCH_USE_CMPXCHG_LOCKREF
  10. select DMA_OPS if PCI
  11. select FORCE_PCI if !ALPHA_JENSEN
  12. select PCI_DOMAINS if PCI
  13. select PCI_SYSCALL if PCI
  14. select HAVE_AOUT
  15. select HAVE_ASM_MODVERSIONS
  16. select HAVE_IDE
  17. select HAVE_OPROFILE
  18. select HAVE_PCSPKR_PLATFORM
  19. select HAVE_PERF_EVENTS
  20. select NEED_DMA_MAP_STATE
  21. select NEED_SG_DMA_LENGTH
  22. select VIRT_TO_BUS
  23. select GENERIC_IRQ_PROBE
  24. select GENERIC_PCI_IOMAP if PCI
  25. select AUTO_IRQ_AFFINITY if SMP
  26. select GENERIC_IRQ_SHOW
  27. select ARCH_WANT_IPC_PARSE_VERSION
  28. select ARCH_HAVE_NMI_SAFE_CMPXCHG
  29. select AUDIT_ARCH
  30. select GENERIC_CLOCKEVENTS
  31. select GENERIC_CPU_VULNERABILITIES
  32. select GENERIC_SMP_IDLE_THREAD
  33. select GENERIC_STRNCPY_FROM_USER
  34. select GENERIC_STRNLEN_USER
  35. select HAVE_ARCH_AUDITSYSCALL
  36. select HAVE_MOD_ARCH_SPECIFIC
  37. select MODULES_USE_ELF_RELA
  38. select ODD_RT_SIGACTION
  39. select OLD_SIGSUSPEND
  40. select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
  41. select MMU_GATHER_NO_RANGE
  42. select SET_FS
  43. help
  44. The Alpha is a 64-bit general-purpose processor designed and
  45. marketed by the Digital Equipment Corporation of blessed memory,
  46. now Hewlett-Packard. The Alpha Linux project has a home page at
  47. <http://www.alphalinux.org/>.
  48. config 64BIT
  49. def_bool y
  50. config MMU
  51. bool
  52. default y
  53. config ARCH_HAS_ILOG2_U32
  54. bool
  55. default n
  56. config ARCH_HAS_ILOG2_U64
  57. bool
  58. default n
  59. config GENERIC_CALIBRATE_DELAY
  60. bool
  61. default y
  62. config ZONE_DMA
  63. bool
  64. default y
  65. config GENERIC_ISA_DMA
  66. bool
  67. default y
  68. config PGTABLE_LEVELS
  69. int
  70. default 3
  71. config AUDIT_ARCH
  72. bool
  73. menu "System setup"
  74. choice
  75. prompt "Alpha system type"
  76. default ALPHA_GENERIC
  77. help
  78. This is the system type of your hardware. A "generic" kernel will
  79. run on any supported Alpha system. However, if you configure a
  80. kernel for your specific system, it will be faster and smaller.
  81. To find out what type of Alpha system you have, you may want to
  82. check out the Linux/Alpha FAQ, accessible on the WWW from
  83. <http://www.alphalinux.org/>. In summary:
  84. Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
  85. Alpha-XL XL-233, XL-266
  86. AlphaBook1 Alpha laptop
  87. Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
  88. Cabriolet AlphaPC64, AlphaPCI64
  89. DP264 DP264 / DS20 / ES40 / DS10 / DS10L
  90. EB164 EB164 21164 evaluation board
  91. EB64+ EB64+ 21064 evaluation board
  92. EB66 EB66 21066 evaluation board
  93. EB66+ EB66+ 21066 evaluation board
  94. Jensen DECpc 150, DEC 2000 models 300, 500
  95. LX164 AlphaPC164-LX
  96. Lynx AS 2100A
  97. Miata Personal Workstation 433/500/600 a/au
  98. Marvel AlphaServer ES47 / ES80 / GS1280
  99. Mikasa AS 1000
  100. Noname AXPpci33, UDB (Multia)
  101. Noritake AS 1000A, AS 600A, AS 800
  102. PC164 AlphaPC164
  103. Rawhide AS 1200, AS 4000, AS 4100
  104. Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
  105. SX164 AlphaPC164-SX
  106. Sable AS 2000, AS 2100
  107. Shark DS 20L
  108. Takara Takara (OEM)
  109. Titan AlphaServer ES45 / DS25 / DS15
  110. Wildfire AlphaServer GS 40/80/160/320
  111. If you don't know what to do, choose "generic".
  112. config ALPHA_GENERIC
  113. bool "Generic"
  114. depends on TTY
  115. select HAVE_EISA
  116. help
  117. A generic kernel will run on all supported Alpha hardware.
  118. config ALPHA_ALCOR
  119. bool "Alcor/Alpha-XLT"
  120. select HAVE_EISA
  121. help
  122. For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
  123. slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
  124. Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
  125. controller (256-bit memory bus) and a PCI interface. It also does
  126. all the work required to support an external Bcache and to maintain
  127. memory coherence when a PCI device DMAs into (or out of) memory.
  128. config ALPHA_XL
  129. bool "Alpha-XL"
  130. help
  131. XL-233 and XL-266-based Alpha systems.
  132. config ALPHA_BOOK1
  133. bool "AlphaBook1"
  134. help
  135. Dec AlphaBook1/Burns Alpha-based laptops.
  136. config ALPHA_AVANTI_CH
  137. bool "Avanti"
  138. config ALPHA_CABRIOLET
  139. bool "Cabriolet"
  140. help
  141. Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
  142. baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
  143. slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
  144. Bcache SIMMs. Requires power supply with 3.3V output.
  145. config ALPHA_DP264
  146. bool "DP264"
  147. help
  148. Various 21264 systems with the tsunami core logic chipset.
  149. API Networks: 264DP, UP2000(+), CS20;
  150. Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
  151. config ALPHA_EB164
  152. bool "EB164"
  153. help
  154. EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
  155. ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
  156. shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
  157. Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
  158. MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
  159. motherboard. Requires power supply with 3.3V output.
  160. config ALPHA_EB64P_CH
  161. bool "EB64+"
  162. config ALPHA_EB66
  163. bool "EB66"
  164. help
  165. A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
  166. identical to EB64+. Baby PC-AT size. Runs from standard PC power
  167. supply. The EB66 schematic was published as a marketing poster
  168. advertising the 21066 as "the first microprocessor in the world with
  169. embedded PCI".
  170. config ALPHA_EB66P
  171. bool "EB66+"
  172. help
  173. Later variant of the EB66 board.
  174. config ALPHA_EIGER
  175. bool "Eiger"
  176. help
  177. Apparently an obscure OEM single-board computer based on the
  178. Typhoon/Tsunami chipset family. Information on it is scanty.
  179. config ALPHA_JENSEN
  180. bool "Jensen"
  181. depends on BROKEN
  182. select HAVE_EISA
  183. help
  184. DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
  185. of the first-generation Alpha systems. A number of these systems
  186. seem to be available on the second- hand market. The Jensen is a
  187. floor-standing tower system which originally used a 150MHz 21064 It
  188. used programmable logic to interface a 486 EISA I/O bridge to the
  189. CPU.
  190. config ALPHA_LX164
  191. bool "LX164"
  192. help
  193. A technical overview of this board is available at
  194. <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
  195. config ALPHA_LYNX
  196. bool "Lynx"
  197. select HAVE_EISA
  198. help
  199. AlphaServer 2100A-based systems.
  200. config ALPHA_MARVEL
  201. bool "Marvel"
  202. help
  203. AlphaServer ES47 / ES80 / GS1280 based on EV7.
  204. config ALPHA_MIATA
  205. bool "Miata"
  206. select HAVE_EISA
  207. help
  208. The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
  209. or 600au).
  210. config ALPHA_MIKASA
  211. bool "Mikasa"
  212. help
  213. AlphaServer 1000-based Alpha systems.
  214. config ALPHA_NAUTILUS
  215. bool "Nautilus"
  216. help
  217. Alpha systems based on the AMD 751 & ALI 1543C chipsets.
  218. config ALPHA_NONAME_CH
  219. bool "Noname"
  220. config ALPHA_NORITAKE
  221. bool "Noritake"
  222. select HAVE_EISA
  223. help
  224. AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
  225. systems.
  226. config ALPHA_PC164
  227. bool "PC164"
  228. config ALPHA_P2K
  229. bool "Platform2000"
  230. config ALPHA_RAWHIDE
  231. bool "Rawhide"
  232. select HAVE_EISA
  233. help
  234. AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
  235. See HOWTO at
  236. <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
  237. config ALPHA_RUFFIAN
  238. bool "Ruffian"
  239. help
  240. Samsung APC164UX. There is a page on known problems and workarounds
  241. at <http://www.alphalinux.org/faq/FAQ-11.html>.
  242. config ALPHA_RX164
  243. bool "RX164"
  244. config ALPHA_SX164
  245. bool "SX164"
  246. config ALPHA_SABLE
  247. bool "Sable"
  248. select HAVE_EISA
  249. help
  250. Digital AlphaServer 2000 and 2100-based systems.
  251. config ALPHA_SHARK
  252. bool "Shark"
  253. config ALPHA_TAKARA
  254. bool "Takara"
  255. help
  256. Alpha 11164-based OEM single-board computer.
  257. config ALPHA_TITAN
  258. bool "Titan"
  259. help
  260. AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
  261. config ALPHA_WILDFIRE
  262. bool "Wildfire"
  263. help
  264. AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
  265. endchoice
  266. # clear all implied options (don't want default values for those):
  267. # Most of these machines have ISA slots; not exactly sure which don't,
  268. # and this doesn't activate hordes of code, so do it always.
  269. config ISA
  270. bool
  271. default y
  272. help
  273. Find out whether you have ISA slots on your motherboard. ISA is the
  274. name of a bus system, i.e. the way the CPU talks to the other stuff
  275. inside your box. Other bus systems are PCI, EISA, MicroChannel
  276. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  277. newer boards don't support it. If you have ISA, say Y, otherwise N.
  278. config ISA_DMA_API
  279. bool
  280. default y
  281. config ALPHA_NONAME
  282. bool
  283. depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
  284. default y
  285. help
  286. The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
  287. UDB). This design was produced by Digital's Technical OEM (TOEM)
  288. group. It uses the 21066 processor running at 166MHz or 233MHz. It
  289. is a baby-AT size, and runs from a standard PC power supply. It has
  290. 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
  291. 2 versions, with either PS/2 or large DIN connectors for the
  292. keyboard.
  293. config ALPHA_EV4
  294. bool
  295. depends on ALPHA_JENSEN || (ALPHA_SABLE && !ALPHA_GAMMA) || ALPHA_LYNX || ALPHA_NORITAKE && !ALPHA_PRIMO || ALPHA_MIKASA && !ALPHA_PRIMO || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL || ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
  296. default y if !ALPHA_LYNX
  297. config ALPHA_LCA
  298. bool
  299. depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
  300. default y
  301. config ALPHA_APECS
  302. bool
  303. depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
  304. default y
  305. config ALPHA_EB64P
  306. bool
  307. depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
  308. default y
  309. help
  310. Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
  311. 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
  312. ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
  313. (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
  314. SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
  315. Runs from standard PC power supply.
  316. config ALPHA_EV5
  317. bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
  318. default y if ALPHA_RX164 || ALPHA_RAWHIDE || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_SABLE && ALPHA_GAMMA || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
  319. config ALPHA_EV4
  320. bool
  321. default y if ALPHA_LYNX && !ALPHA_EV5
  322. config ALPHA_CIA
  323. bool
  324. depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
  325. default y
  326. config ALPHA_EV56
  327. bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
  328. default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
  329. config ALPHA_EV56
  330. prompt "EV56 CPU (speed >= 333MHz)?"
  331. depends on ALPHA_NORITAKE || ALPHA_PRIMO
  332. config ALPHA_EV56
  333. prompt "EV56 CPU (speed >= 400MHz)?"
  334. depends on ALPHA_RAWHIDE
  335. config ALPHA_PRIMO
  336. bool "EV5 CPU daughtercard (model 5/xxx)?"
  337. depends on ALPHA_NORITAKE || ALPHA_MIKASA
  338. help
  339. Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
  340. config ALPHA_GAMMA
  341. bool "EV5 CPU(s) (model 5/xxx)?"
  342. depends on ALPHA_SABLE
  343. help
  344. Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
  345. config ALPHA_GAMMA
  346. bool
  347. depends on ALPHA_LYNX
  348. default y
  349. config ALPHA_T2
  350. bool
  351. depends on ALPHA_SABLE || ALPHA_LYNX
  352. default y
  353. config ALPHA_PYXIS
  354. bool
  355. depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
  356. default y
  357. config ALPHA_EV6
  358. bool
  359. depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
  360. default y
  361. config ALPHA_TSUNAMI
  362. bool
  363. depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
  364. default y
  365. config ALPHA_EV67
  366. bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
  367. default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
  368. help
  369. Is this a machine based on the EV67 core? If in doubt, select N here
  370. and the machine will be treated as an EV6.
  371. config ALPHA_MCPCIA
  372. bool
  373. depends on ALPHA_RAWHIDE
  374. default y
  375. config ALPHA_POLARIS
  376. bool
  377. depends on ALPHA_RX164
  378. default y
  379. config ALPHA_IRONGATE
  380. bool
  381. depends on ALPHA_NAUTILUS
  382. default y
  383. config GENERIC_HWEIGHT
  384. bool
  385. default y if !ALPHA_EV67
  386. config ALPHA_AVANTI
  387. bool
  388. depends on ALPHA_XL || ALPHA_AVANTI_CH
  389. default y
  390. help
  391. Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
  392. Alphas. Info at
  393. <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
  394. config ALPHA_BROKEN_IRQ_MASK
  395. bool
  396. depends on ALPHA_GENERIC || ALPHA_PC164
  397. default y
  398. config VGA_HOSE
  399. bool
  400. depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
  401. default y
  402. help
  403. Support VGA on an arbitrary hose; needed for several platforms
  404. which always have multiple hoses, and whose consoles support it.
  405. config ALPHA_QEMU
  406. bool "Run under QEMU emulation"
  407. depends on !ALPHA_GENERIC
  408. help
  409. Assume the presence of special features supported by QEMU PALcode
  410. that reduce the overhead of system emulation.
  411. Generic kernels will auto-detect QEMU. But when building a
  412. system-specific kernel, the assumption is that we want to
  413. eliminate as many runtime tests as possible.
  414. If unsure, say N.
  415. config ALPHA_SRM
  416. bool "Use SRM as bootloader" if ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS || ALPHA_NONAME
  417. depends on TTY
  418. default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
  419. help
  420. There are two different types of booting firmware on Alphas: SRM,
  421. which is command line driven, and ARC, which uses menus and arrow
  422. keys. Details about the Linux/Alpha booting process are contained in
  423. the Linux/Alpha FAQ, accessible on the WWW from
  424. <http://www.alphalinux.org/>.
  425. The usual way to load Linux on an Alpha machine is to use MILO
  426. (a bootloader that lets you pass command line parameters to the
  427. kernel just like lilo does for the x86 architecture) which can be
  428. loaded either from ARC or can be installed directly as a permanent
  429. firmware replacement from floppy (which requires changing a certain
  430. jumper on the motherboard). If you want to do either of these, say N
  431. here. If MILO doesn't work on your system (true for Jensen
  432. motherboards), you can bypass it altogether and boot Linux directly
  433. from an SRM console; say Y here in order to do that. Note that you
  434. won't be able to boot from an IDE disk using SRM.
  435. If unsure, say N.
  436. config ARCH_MAY_HAVE_PC_FDC
  437. def_bool y
  438. config SMP
  439. bool "Symmetric multi-processing support"
  440. depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
  441. help
  442. This enables support for systems with more than one CPU. If you have
  443. a system with only one CPU, say N. If you have a system with more
  444. than one CPU, say Y.
  445. If you say N here, the kernel will run on uni- and multiprocessor
  446. machines, but will use only one CPU of a multiprocessor machine. If
  447. you say Y here, the kernel will run on many, but not all,
  448. uniprocessor machines. On a uniprocessor machine, the kernel
  449. will run faster if you say N here.
  450. See also the SMP-HOWTO available at
  451. <http://www.tldp.org/docs.html#howto>.
  452. If you don't know what to do here, say N.
  453. config NR_CPUS
  454. int "Maximum number of CPUs (2-32)"
  455. range 2 32
  456. depends on SMP
  457. default "32" if ALPHA_GENERIC || ALPHA_MARVEL
  458. default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
  459. help
  460. MARVEL support can handle a maximum of 32 CPUs, all the others
  461. with working support have a maximum of 4 CPUs.
  462. config ARCH_DISCONTIGMEM_ENABLE
  463. bool "Discontiguous Memory Support"
  464. help
  465. Say Y to support efficient handling of discontiguous physical memory,
  466. for architectures which are either NUMA (Non-Uniform Memory Access)
  467. or have huge holes in the physical address space for other reasons.
  468. See <file:Documentation/vm/numa.rst> for more.
  469. config NUMA
  470. bool "NUMA Support (EXPERIMENTAL)"
  471. depends on DISCONTIGMEM && BROKEN
  472. help
  473. Say Y to compile the kernel to support NUMA (Non-Uniform Memory
  474. Access). This option is for configuring high-end multiprocessor
  475. server machines. If in doubt, say N.
  476. config ALPHA_WTINT
  477. bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
  478. default y if ALPHA_QEMU
  479. default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
  480. default n if !ALPHA_SRM && !ALPHA_GENERIC
  481. default y if SMP
  482. help
  483. The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
  484. to sleep until the next interrupt. This may reduce the power
  485. consumed, and the heat produced by the computer. However, it has
  486. the side effect of making the cycle counter unreliable as a timing
  487. device across the sleep.
  488. For emulation under QEMU, definitely say Y here, as we have other
  489. mechanisms for measuring time than the cycle counter.
  490. For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
  491. MILO, sleep mode is not supported so you might as well say N here.
  492. For SMP systems we cannot use the cycle counter for timing anyway,
  493. so you might as well say Y here.
  494. If unsure, say N.
  495. config NODES_SHIFT
  496. int
  497. default "7"
  498. depends on NEED_MULTIPLE_NODES
  499. # LARGE_VMALLOC is racy, if you *really* need it then fix it first
  500. config ALPHA_LARGE_VMALLOC
  501. bool
  502. help
  503. Process creation and other aspects of virtual memory management can
  504. be streamlined if we restrict the kernel to one PGD for all vmalloc
  505. allocations. This equates to about 8GB.
  506. Under normal circumstances, this is so far and above what is needed
  507. as to be laughable. However, there are certain applications (such
  508. as benchmark-grade in-kernel web serving) that can make use of as
  509. much vmalloc space as is available.
  510. Say N unless you know you need gobs and gobs of vmalloc space.
  511. config VERBOSE_MCHECK
  512. bool "Verbose Machine Checks"
  513. config VERBOSE_MCHECK_ON
  514. int "Verbose Printing Mode (0=off, 1=on, 2=all)"
  515. depends on VERBOSE_MCHECK
  516. default 1
  517. help
  518. This option allows the default printing mode to be set, and then
  519. possibly overridden by a boot command argument.
  520. For example, if one wanted the option of printing verbose
  521. machine checks, but wanted the default to be as if verbose
  522. machine check printing was turned off, then one would choose
  523. the printing mode to be 0. Then, upon reboot, one could add
  524. the boot command line "verbose_mcheck=1" to get the normal
  525. verbose machine check printing, or "verbose_mcheck=2" to get
  526. the maximum information available.
  527. Take the default (1) unless you want more control or more info.
  528. choice
  529. prompt "Timer interrupt frequency (HZ)?"
  530. default HZ_128 if ALPHA_QEMU
  531. default HZ_1200 if ALPHA_RAWHIDE
  532. default HZ_1024
  533. help
  534. The frequency at which timer interrupts occur. A high frequency
  535. minimizes latency, whereas a low frequency minimizes overhead of
  536. process accounting. The later effect is especially significant
  537. when being run under QEMU.
  538. Note that some Alpha hardware cannot change the interrupt frequency
  539. of the timer. If unsure, say 1024 (or 1200 for Rawhide).
  540. config HZ_32
  541. bool "32 Hz"
  542. config HZ_64
  543. bool "64 Hz"
  544. config HZ_128
  545. bool "128 Hz"
  546. config HZ_256
  547. bool "256 Hz"
  548. config HZ_1024
  549. bool "1024 Hz"
  550. config HZ_1200
  551. bool "1200 Hz"
  552. endchoice
  553. config HZ
  554. int
  555. default 32 if HZ_32
  556. default 64 if HZ_64
  557. default 128 if HZ_128
  558. default 256 if HZ_256
  559. default 1200 if HZ_1200
  560. default 1024
  561. config SRM_ENV
  562. tristate "SRM environment through procfs"
  563. depends on PROC_FS
  564. help
  565. If you enable this option, a subdirectory inside /proc called
  566. /proc/srm_environment will give you access to the all important
  567. SRM environment variables (those which have a name) and also
  568. to all others (by their internal number).
  569. SRM is something like a BIOS for Alpha machines. There are some
  570. other such BIOSes, like AlphaBIOS, which this driver cannot
  571. support (hey, that's not SRM!).
  572. Despite the fact that this driver doesn't work on all Alphas (but
  573. only on those which have SRM as their firmware), it's save to
  574. build it even if your particular machine doesn't know about SRM
  575. (or if you intend to compile a generic kernel). It will simply
  576. not create those subdirectory in /proc (and give you some warning,
  577. of course).
  578. This driver is also available as a module and will be called
  579. srm_env then.
  580. endmenu
  581. # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
  582. # but we also need it if VGA_HOSE is set
  583. config DUMMY_CONSOLE
  584. bool
  585. depends on VGA_HOSE
  586. default y