Kconfig 12 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 "IA-64 Linux Kernel Configuration"
  6. source "init/Kconfig"
  7. menu "Processor type and features"
  8. config IA64
  9. bool
  10. default y
  11. help
  12. The Itanium Processor Family is Intel's 64-bit successor to
  13. the 32-bit X86 line. The IA-64 Linux project has a home
  14. page at <http://www.linuxia64.org/> and a mailing list at
  15. <linux-ia64@vger.kernel.org>.
  16. config 64BIT
  17. bool
  18. default y
  19. config MMU
  20. bool
  21. default y
  22. config SWIOTLB
  23. bool
  24. default y
  25. config RWSEM_XCHGADD_ALGORITHM
  26. bool
  27. default y
  28. config GENERIC_CALIBRATE_DELAY
  29. bool
  30. default y
  31. config TIME_INTERPOLATION
  32. bool
  33. default y
  34. config EFI
  35. bool
  36. default y
  37. config GENERIC_IOMAP
  38. bool
  39. default y
  40. config SCHED_NO_NO_OMIT_FRAME_POINTER
  41. bool
  42. default y
  43. config IA64_UNCACHED_ALLOCATOR
  44. bool
  45. select GENERIC_ALLOCATOR
  46. config DMA_IS_DMA32
  47. bool
  48. default y
  49. choice
  50. prompt "System type"
  51. default IA64_GENERIC
  52. config IA64_GENERIC
  53. bool "generic"
  54. select ACPI
  55. select NUMA
  56. select ACPI_NUMA
  57. help
  58. This selects the system type of your hardware. A "generic" kernel
  59. will run on any supported IA-64 system. However, if you configure
  60. a kernel for your specific system, it will be faster and smaller.
  61. generic For any supported IA-64 system
  62. DIG-compliant For DIG ("Developer's Interface Guide") compliant systems
  63. HP-zx1/sx1000 For HP systems
  64. HP-zx1/sx1000+swiotlb For HP systems with (broken) DMA-constrained devices.
  65. SGI-SN2 For SGI Altix systems
  66. Ski-simulator For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
  67. If you don't know what to do, choose "generic".
  68. config IA64_DIG
  69. bool "DIG-compliant"
  70. config IA64_HP_ZX1
  71. bool "HP-zx1/sx1000"
  72. help
  73. Build a kernel that runs on HP zx1 and sx1000 systems. This adds
  74. support for the HP I/O MMU.
  75. config IA64_HP_ZX1_SWIOTLB
  76. bool "HP-zx1/sx1000 with software I/O TLB"
  77. help
  78. Build a kernel that runs on HP zx1 and sx1000 systems even when they
  79. have broken PCI devices which cannot DMA to full 32 bits. Apart
  80. from support for the HP I/O MMU, this includes support for the software
  81. I/O TLB, which allows supporting the broken devices at the expense of
  82. wasting some kernel memory (about 2MB by default).
  83. config IA64_SGI_SN2
  84. bool "SGI-SN2"
  85. help
  86. Selecting this option will optimize the kernel for use on sn2 based
  87. systems, but the resulting kernel binary will not run on other
  88. types of ia64 systems. If you have an SGI Altix system, it's safe
  89. to select this option. If in doubt, select ia64 generic support
  90. instead.
  91. config IA64_HP_SIM
  92. bool "Ski-simulator"
  93. endchoice
  94. choice
  95. prompt "Processor type"
  96. default ITANIUM
  97. config ITANIUM
  98. bool "Itanium"
  99. help
  100. Select your IA-64 processor type. The default is Itanium.
  101. This choice is safe for all IA-64 systems, but may not perform
  102. optimally on systems with, say, Itanium 2 or newer processors.
  103. config MCKINLEY
  104. bool "Itanium 2"
  105. help
  106. Select this to configure for an Itanium 2 (McKinley) processor.
  107. endchoice
  108. choice
  109. prompt "Kernel page size"
  110. default IA64_PAGE_SIZE_16KB
  111. config IA64_PAGE_SIZE_4KB
  112. bool "4KB"
  113. help
  114. This lets you select the page size of the kernel. For best IA-64
  115. performance, a page size of 8KB or 16KB is recommended. For best
  116. IA-32 compatibility, a page size of 4KB should be selected (the vast
  117. majority of IA-32 binaries work perfectly fine with a larger page
  118. size). For Itanium 2 or newer systems, a page size of 64KB can also
  119. be selected.
  120. 4KB For best IA-32 compatibility
  121. 8KB For best IA-64 performance
  122. 16KB For best IA-64 performance
  123. 64KB Requires Itanium 2 or newer processor.
  124. If you don't know what to do, choose 16KB.
  125. config IA64_PAGE_SIZE_8KB
  126. bool "8KB"
  127. config IA64_PAGE_SIZE_16KB
  128. bool "16KB"
  129. config IA64_PAGE_SIZE_64KB
  130. depends on !ITANIUM
  131. bool "64KB"
  132. endchoice
  133. choice
  134. prompt "Page Table Levels"
  135. default PGTABLE_3
  136. config PGTABLE_3
  137. bool "3 Levels"
  138. config PGTABLE_4
  139. depends on !IA64_PAGE_SIZE_64KB
  140. bool "4 Levels"
  141. endchoice
  142. source kernel/Kconfig.hz
  143. config IA64_BRL_EMU
  144. bool
  145. depends on ITANIUM
  146. default y
  147. # align cache-sensitive data to 128 bytes
  148. config IA64_L1_CACHE_SHIFT
  149. int
  150. default "7" if MCKINLEY
  151. default "6" if ITANIUM
  152. # align cache-sensitive data to 64 bytes
  153. config IA64_CYCLONE
  154. bool "Cyclone (EXA) Time Source support"
  155. help
  156. Say Y here to enable support for IBM EXA Cyclone time source.
  157. If you're unsure, answer N.
  158. config IOSAPIC
  159. bool
  160. depends on !IA64_HP_SIM
  161. default y
  162. config IA64_SGI_SN_XP
  163. tristate "Support communication between SGI SSIs"
  164. depends on IA64_GENERIC || IA64_SGI_SN2
  165. select IA64_UNCACHED_ALLOCATOR
  166. help
  167. An SGI machine can be divided into multiple Single System
  168. Images which act independently of each other and have
  169. hardware based memory protection from the others. Enabling
  170. this feature will allow for direct communication between SSIs
  171. based on a network adapter and DMA messaging.
  172. config FORCE_MAX_ZONEORDER
  173. int "MAX_ORDER (11 - 17)" if !HUGETLB_PAGE
  174. range 11 17 if !HUGETLB_PAGE
  175. default "17" if HUGETLB_PAGE
  176. default "11"
  177. config SMP
  178. bool "Symmetric multi-processing support"
  179. help
  180. This enables support for systems with more than one CPU. If you have
  181. a system with only one CPU, say N. If you have a system with more
  182. than one CPU, say Y.
  183. If you say N here, the kernel will run on single and multiprocessor
  184. systems, but will use only one CPU of a multiprocessor system. If
  185. you say Y here, the kernel will run on many, but not all,
  186. single processor systems. On a single processor system, the kernel
  187. will run faster if you say N here.
  188. See also the <file:Documentation/smp.txt> and the SMP-HOWTO
  189. available at <http://www.tldp.org/docs.html#howto>.
  190. If you don't know what to do here, say N.
  191. config NR_CPUS
  192. int "Maximum number of CPUs (2-1024)"
  193. range 2 1024
  194. depends on SMP
  195. default "64"
  196. help
  197. You should set this to the number of CPUs in your system, but
  198. keep in mind that a kernel compiled for, e.g., 2 CPUs will boot but
  199. only use 2 CPUs on a >2 CPU system. Setting this to a value larger
  200. than 64 will cause the use of a CPU mask array, causing a small
  201. performance hit.
  202. config HOTPLUG_CPU
  203. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  204. depends on SMP && EXPERIMENTAL
  205. select HOTPLUG
  206. default n
  207. ---help---
  208. Say Y here to experiment with turning CPUs off and on. CPUs
  209. can be controlled through /sys/devices/system/cpu/cpu#.
  210. Say N if you want to disable CPU hotplug.
  211. config SCHED_SMT
  212. bool "SMT scheduler support"
  213. depends on SMP
  214. default off
  215. help
  216. Improves the CPU scheduler's decision making when dealing with
  217. Intel IA64 chips with MultiThreading at a cost of slightly increased
  218. overhead in some places. If unsure say N here.
  219. config PERMIT_BSP_REMOVE
  220. bool "Support removal of Bootstrap Processor"
  221. depends on HOTPLUG_CPU
  222. default n
  223. ---help---
  224. Say Y here if your platform SAL will support removal of BSP with HOTPLUG_CPU
  225. support.
  226. config FORCE_CPEI_RETARGET
  227. bool "Force assumption that CPEI can be re-targetted"
  228. depends on PERMIT_BSP_REMOVE
  229. default n
  230. ---help---
  231. Say Y if you need to force the assumption that CPEI can be re-targetted to
  232. any cpu in the system. This hint is available via ACPI 3.0 specifications.
  233. Tiger4 systems are capable of re-directing CPEI to any CPU other than BSP.
  234. This option it useful to enable this feature on older BIOS's as well.
  235. You can also enable this by using boot command line option force_cpei=1.
  236. config PREEMPT
  237. bool "Preemptible Kernel"
  238. help
  239. This option reduces the latency of the kernel when reacting to
  240. real-time or interactive events by allowing a low priority process to
  241. be preempted even if it is in kernel mode executing a system call.
  242. This allows applications to run more reliably even when the system is
  243. under load.
  244. Say Y here if you are building a kernel for a desktop, embedded
  245. or real-time system. Say N if you are unsure.
  246. source "mm/Kconfig"
  247. config ARCH_SELECT_MEMORY_MODEL
  248. def_bool y
  249. config ARCH_DISCONTIGMEM_ENABLE
  250. def_bool y
  251. help
  252. Say Y to support efficient handling of discontiguous physical memory,
  253. for architectures which are either NUMA (Non-Uniform Memory Access)
  254. or have huge holes in the physical address space for other reasons.
  255. See <file:Documentation/vm/numa> for more.
  256. config ARCH_FLATMEM_ENABLE
  257. def_bool y
  258. config ARCH_SPARSEMEM_ENABLE
  259. def_bool y
  260. depends on ARCH_DISCONTIGMEM_ENABLE
  261. config ARCH_DISCONTIGMEM_DEFAULT
  262. def_bool y if (IA64_SGI_SN2 || IA64_GENERIC || IA64_HP_ZX1 || IA64_HP_ZX1_SWIOTLB)
  263. depends on ARCH_DISCONTIGMEM_ENABLE
  264. config NUMA
  265. bool "NUMA support"
  266. depends on !IA64_HP_SIM && !FLATMEM
  267. default y if IA64_SGI_SN2
  268. help
  269. Say Y to compile the kernel to support NUMA (Non-Uniform Memory
  270. Access). This option is for configuring high-end multiprocessor
  271. server systems. If in doubt, say N.
  272. # VIRTUAL_MEM_MAP and FLAT_NODE_MEM_MAP are functionally equivalent.
  273. # VIRTUAL_MEM_MAP has been retained for historical reasons.
  274. config VIRTUAL_MEM_MAP
  275. bool "Virtual mem map"
  276. depends on !SPARSEMEM
  277. default y if !IA64_HP_SIM
  278. help
  279. Say Y to compile the kernel with support for a virtual mem map.
  280. This code also only takes effect if a memory hole of greater than
  281. 1 Gb is found during boot. You must turn this option on if you
  282. require the DISCONTIGMEM option for your machine. If you are
  283. unsure, say Y.
  284. config HOLES_IN_ZONE
  285. bool
  286. default y if VIRTUAL_MEM_MAP
  287. config HAVE_ARCH_EARLY_PFN_TO_NID
  288. def_bool y
  289. depends on NEED_MULTIPLE_NODES
  290. config IA32_SUPPORT
  291. bool "Support for Linux/x86 binaries"
  292. help
  293. IA-64 processors can execute IA-32 (X86) instructions. By
  294. saying Y here, the kernel will include IA-32 system call
  295. emulation support which makes it possible to transparently
  296. run IA-32 Linux binaries on an IA-64 Linux system.
  297. If in doubt, say Y.
  298. config COMPAT
  299. bool
  300. depends on IA32_SUPPORT
  301. default y
  302. config IA64_MCA_RECOVERY
  303. tristate "MCA recovery from errors other than TLB."
  304. config PERFMON
  305. bool "Performance monitor support"
  306. help
  307. Selects whether support for the IA-64 performance monitor hardware
  308. is included in the kernel. This makes some kernel data-structures a
  309. little bigger and slows down execution a bit, but it is generally
  310. a good idea to turn this on. If you're unsure, say Y.
  311. config IA64_PALINFO
  312. tristate "/proc/pal support"
  313. help
  314. If you say Y here, you are able to get PAL (Processor Abstraction
  315. Layer) information in /proc/pal. This contains useful information
  316. about the processors in your systems, such as cache and TLB sizes
  317. and the PAL firmware version in use.
  318. To use this option, you have to ensure that the "/proc file system
  319. support" (CONFIG_PROC_FS) is enabled, too.
  320. source "drivers/firmware/Kconfig"
  321. source "fs/Kconfig.binfmt"
  322. endmenu
  323. menu "Power management and ACPI"
  324. source "kernel/power/Kconfig"
  325. source "drivers/acpi/Kconfig"
  326. if PM
  327. source "arch/ia64/kernel/cpufreq/Kconfig"
  328. endif
  329. endmenu
  330. if !IA64_HP_SIM
  331. menu "Bus options (PCI, PCMCIA)"
  332. config PCI
  333. bool "PCI support"
  334. help
  335. Real IA-64 machines all have PCI/PCI-X/PCI Express busses. Say Y
  336. here unless you are using a simulator without PCI support.
  337. config PCI_DOMAINS
  338. bool
  339. default PCI
  340. source "drivers/pci/Kconfig"
  341. source "drivers/pci/hotplug/Kconfig"
  342. source "drivers/pcmcia/Kconfig"
  343. endmenu
  344. endif
  345. source "net/Kconfig"
  346. source "drivers/Kconfig"
  347. source "fs/Kconfig"
  348. source "lib/Kconfig"
  349. #
  350. # Use the generic interrupt handling code in kernel/irq/:
  351. #
  352. config GENERIC_HARDIRQS
  353. bool
  354. default y
  355. config GENERIC_IRQ_PROBE
  356. bool
  357. default y
  358. config GENERIC_PENDING_IRQ
  359. bool
  360. depends on GENERIC_HARDIRQS && SMP
  361. default y
  362. source "arch/ia64/hp/sim/Kconfig"
  363. menu "Instrumentation Support"
  364. depends on EXPERIMENTAL
  365. source "arch/ia64/oprofile/Kconfig"
  366. config KPROBES
  367. bool "Kprobes (EXPERIMENTAL)"
  368. help
  369. Kprobes allows you to trap at almost any kernel address and
  370. execute a callback function. register_kprobe() establishes
  371. a probepoint and specifies the callback. Kprobes is useful
  372. for kernel debugging, non-intrusive instrumentation and testing.
  373. If in doubt, say "N".
  374. endmenu
  375. source "arch/ia64/Kconfig.debug"
  376. source "security/Kconfig"
  377. source "crypto/Kconfig"