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