Kconfig 17 KB

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  1. # For a description of the syntax of this configuration file,
  2. # see Documentation/kbuild/kconfig-language.txt.
  3. #
  4. mainmenu "Linux/PowerPC Kernel Configuration"
  5. source "arch/powerpc/platforms/Kconfig.cputype"
  6. config PPC32
  7. bool
  8. default y if !PPC64
  9. config 64BIT
  10. bool
  11. default y if PPC64
  12. config WORD_SIZE
  13. int
  14. default 64 if PPC64
  15. default 32 if !PPC64
  16. config PPC_MERGE
  17. def_bool y
  18. config MMU
  19. bool
  20. default y
  21. config GENERIC_CMOS_UPDATE
  22. def_bool y
  23. config GENERIC_TIME
  24. def_bool y
  25. config GENERIC_TIME_VSYSCALL
  26. def_bool y
  27. config GENERIC_CLOCKEVENTS
  28. def_bool y
  29. config GENERIC_HARDIRQS
  30. bool
  31. default y
  32. config IRQ_PER_CPU
  33. bool
  34. default y
  35. config RWSEM_GENERIC_SPINLOCK
  36. bool
  37. config RWSEM_XCHGADD_ALGORITHM
  38. bool
  39. default y
  40. config ARCH_HAS_ILOG2_U32
  41. bool
  42. default y
  43. config ARCH_HAS_ILOG2_U64
  44. bool
  45. default y if 64BIT
  46. config GENERIC_HWEIGHT
  47. bool
  48. default y
  49. config GENERIC_CALIBRATE_DELAY
  50. bool
  51. default y
  52. config GENERIC_FIND_NEXT_BIT
  53. bool
  54. default y
  55. config ARCH_NO_VIRT_TO_BUS
  56. def_bool PPC64
  57. config PPC
  58. bool
  59. default y
  60. config EARLY_PRINTK
  61. bool
  62. default y
  63. config COMPAT
  64. bool
  65. default y if PPC64
  66. config SYSVIPC_COMPAT
  67. bool
  68. depends on COMPAT && SYSVIPC
  69. default y
  70. # All PPC32s use generic nvram driver through ppc_md
  71. config GENERIC_NVRAM
  72. bool
  73. default y if PPC32
  74. config SCHED_NO_NO_OMIT_FRAME_POINTER
  75. bool
  76. default y
  77. config ARCH_MAY_HAVE_PC_FDC
  78. bool
  79. default !PPC_PSERIES || PCI
  80. config PPC_OF
  81. def_bool y
  82. config OF
  83. def_bool y
  84. config PPC_UDBG_16550
  85. bool
  86. default n
  87. config GENERIC_TBSYNC
  88. bool
  89. default y if PPC32 && SMP
  90. default n
  91. config AUDIT_ARCH
  92. bool
  93. default y
  94. config GENERIC_BUG
  95. bool
  96. default y
  97. depends on BUG
  98. config SYS_SUPPORTS_APM_EMULATION
  99. default y if PMAC_APM_EMU
  100. bool
  101. config DEFAULT_UIMAGE
  102. bool
  103. help
  104. Used to allow a board to specify it wants a uImage built by default
  105. default n
  106. config PPC64_SWSUSP
  107. bool
  108. depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
  109. default y
  110. config PPC_DCR_NATIVE
  111. bool
  112. default n
  113. config PPC_DCR_MMIO
  114. bool
  115. default n
  116. config PPC_DCR
  117. bool
  118. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  119. default y
  120. config PPC_OF_PLATFORM_PCI
  121. bool
  122. depends on PPC64 # not supported on 32 bits yet
  123. default n
  124. source "init/Kconfig"
  125. source "arch/powerpc/platforms/Kconfig"
  126. menu "Kernel options"
  127. config HIGHMEM
  128. bool "High memory support"
  129. depends on PPC32
  130. source kernel/time/Kconfig
  131. source kernel/Kconfig.hz
  132. source kernel/Kconfig.preempt
  133. source "fs/Kconfig.binfmt"
  134. # We optimistically allocate largepages from the VM, so make the limit
  135. # large enough (16MB). This badly named config option is actually
  136. # max order + 1
  137. config FORCE_MAX_ZONEORDER
  138. int
  139. depends on PPC64
  140. default "9" if PPC_64K_PAGES
  141. default "13"
  142. config MATH_EMULATION
  143. bool "Math emulation"
  144. depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
  145. ---help---
  146. Some PowerPC chips designed for embedded applications do not have
  147. a floating-point unit and therefore do not implement the
  148. floating-point instructions in the PowerPC instruction set. If you
  149. say Y here, the kernel will include code to emulate a floating-point
  150. unit, which will allow programs that use floating-point
  151. instructions to run.
  152. config 8XX_MINIMAL_FPEMU
  153. bool "Minimal math emulation for 8xx"
  154. depends on 8xx && !MATH_EMULATION
  155. help
  156. Older arch/ppc kernels still emulated a few floating point
  157. instructions such as load and store, even when full math
  158. emulation is disabled. Say "Y" here if you want to preserve
  159. this behavior.
  160. It is recommended that you build a soft-float userspace instead.
  161. config IOMMU_VMERGE
  162. bool "Enable IOMMU virtual merging"
  163. depends on PPC64
  164. default y
  165. help
  166. Cause IO segments sent to a device for DMA to be merged virtually
  167. by the IOMMU when they happen to have been allocated contiguously.
  168. This doesn't add pressure to the IOMMU allocator. However, some
  169. drivers don't support getting large merged segments coming back
  170. from *_map_sg().
  171. Most drivers don't have this problem; it is safe to say Y here.
  172. config HOTPLUG_CPU
  173. bool "Support for enabling/disabling CPUs"
  174. depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
  175. ---help---
  176. Say Y here to be able to disable and re-enable individual
  177. CPUs at runtime on SMP machines.
  178. Say N if you are unsure.
  179. config ARCH_ENABLE_MEMORY_HOTPLUG
  180. def_bool y
  181. config KEXEC
  182. bool "kexec system call (EXPERIMENTAL)"
  183. depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
  184. help
  185. kexec is a system call that implements the ability to shutdown your
  186. current kernel, and to start another kernel. It is like a reboot
  187. but it is independent of the system firmware. And like a reboot
  188. you can start any kernel with it, not just Linux.
  189. The name comes from the similarity to the exec system call.
  190. It is an ongoing process to be certain the hardware in a machine
  191. is properly shutdown, so do not be surprised if this code does not
  192. initially work for you. It may help to enable device hotplugging
  193. support. As of this writing the exact hardware interface is
  194. strongly in flux, so no good recommendation can be made.
  195. config CRASH_DUMP
  196. bool "Build a kdump crash kernel (EXPERIMENTAL)"
  197. depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
  198. help
  199. Build a kernel suitable for use as a kdump capture kernel.
  200. The kernel will be linked at a different address than normal, and
  201. so can only be used for Kdump.
  202. Don't change this unless you know what you are doing.
  203. config PPCBUG_NVRAM
  204. bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
  205. default y if PPC_PREP
  206. config IRQ_ALL_CPUS
  207. bool "Distribute interrupts on all CPUs by default"
  208. depends on SMP && !MV64360
  209. help
  210. This option gives the kernel permission to distribute IRQs across
  211. multiple CPUs. Saying N here will route all IRQs to the first
  212. CPU. Generally saying Y is safe, although some problems have been
  213. reported with SMP Power Macintoshes with this option enabled.
  214. config NUMA
  215. bool "NUMA support"
  216. depends on PPC64
  217. default y if SMP && PPC_PSERIES
  218. config NODES_SHIFT
  219. int
  220. default "4"
  221. depends on NEED_MULTIPLE_NODES
  222. config ARCH_SELECT_MEMORY_MODEL
  223. def_bool y
  224. depends on PPC64
  225. config ARCH_FLATMEM_ENABLE
  226. def_bool y
  227. depends on (PPC64 && !NUMA) || PPC32
  228. config ARCH_SPARSEMEM_ENABLE
  229. def_bool y
  230. depends on PPC64
  231. config ARCH_SPARSEMEM_DEFAULT
  232. def_bool y
  233. depends on (SMP && PPC_PSERIES) || PPC_PS3
  234. config ARCH_POPULATES_NODE_MAP
  235. def_bool y
  236. source "mm/Kconfig"
  237. config ARCH_MEMORY_PROBE
  238. def_bool y
  239. depends on MEMORY_HOTPLUG
  240. # Some NUMA nodes have memory ranges that span
  241. # other nodes. Even though a pfn is valid and
  242. # between a node's start and end pfns, it may not
  243. # reside on that node. See memmap_init_zone()
  244. # for details.
  245. config NODES_SPAN_OTHER_NODES
  246. def_bool y
  247. depends on NEED_MULTIPLE_NODES
  248. config PPC_HAS_HASH_64K
  249. bool
  250. depends on PPC64
  251. default n
  252. config PPC_64K_PAGES
  253. bool "64k page size"
  254. depends on PPC64
  255. select PPC_HAS_HASH_64K
  256. help
  257. This option changes the kernel logical page size to 64k. On machines
  258. without processor support for 64k pages, the kernel will simulate
  259. them by loading each individual 4k page on demand transparently,
  260. while on hardware with such support, it will be used to map
  261. normal application pages.
  262. config SCHED_SMT
  263. bool "SMT (Hyperthreading) scheduler support"
  264. depends on PPC64 && SMP
  265. help
  266. SMT scheduler support improves the CPU scheduler's decision making
  267. when dealing with POWER5 cpus at a cost of slightly increased
  268. overhead in some places. If unsure say N here.
  269. config PROC_DEVICETREE
  270. bool "Support for device tree in /proc"
  271. depends on PROC_FS
  272. help
  273. This option adds a device-tree directory under /proc which contains
  274. an image of the device tree that the kernel copies from Open
  275. Firmware or other boot firmware. If unsure, say Y here.
  276. config CMDLINE_BOOL
  277. bool "Default bootloader kernel arguments"
  278. config CMDLINE
  279. string "Initial kernel command string"
  280. depends on CMDLINE_BOOL
  281. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  282. help
  283. On some platforms, there is currently no way for the boot loader to
  284. pass arguments to the kernel. For these platforms, you can supply
  285. some command-line options at build time by entering them here. In
  286. most cases you will need to specify the root device here.
  287. if !44x || BROKEN
  288. source kernel/power/Kconfig
  289. endif
  290. config SECCOMP
  291. bool "Enable seccomp to safely compute untrusted bytecode"
  292. depends on PROC_FS
  293. default y
  294. help
  295. This kernel feature is useful for number crunching applications
  296. that may need to compute untrusted bytecode during their
  297. execution. By using pipes or other transports made available to
  298. the process as file descriptors supporting the read/write
  299. syscalls, it's possible to isolate those applications in
  300. their own address space using seccomp. Once seccomp is
  301. enabled via /proc/<pid>/seccomp, it cannot be disabled
  302. and the task is only allowed to execute a few safe syscalls
  303. defined by each seccomp mode.
  304. If unsure, say Y. Only embedded should say N here.
  305. config WANT_DEVICE_TREE
  306. bool
  307. default n
  308. config DEVICE_TREE
  309. string "Static device tree source file"
  310. depends on WANT_DEVICE_TREE
  311. help
  312. This specifies the device tree source (.dts) file to be
  313. compiled and included when building the bootwrapper. If a
  314. relative filename is given, then it will be relative to
  315. arch/powerpc/boot/dts. If you are not using the bootwrapper,
  316. or do not need to build a dts into the bootwrapper, this
  317. field is ignored.
  318. For example, this is required when building a cuImage target
  319. for an older U-Boot, which cannot pass a device tree itself.
  320. Such a kernel will not work with a newer U-Boot that tries to
  321. pass a device tree (unless you tell it not to). If your U-Boot
  322. does not mention a device tree in "help bootm", then use the
  323. cuImage target and specify a device tree here. Otherwise, use
  324. the uImage target and leave this field blank.
  325. endmenu
  326. config ISA_DMA_API
  327. bool
  328. default y
  329. menu "Bus options"
  330. config ISA
  331. bool "Support for ISA-bus hardware"
  332. depends on PPC_PREP || PPC_CHRP
  333. select PPC_I8259
  334. help
  335. Find out whether you have ISA slots on your motherboard. ISA is the
  336. name of a bus system, i.e. the way the CPU talks to the other stuff
  337. inside your box. If you have an Apple machine, say N here; if you
  338. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  339. you have an embedded board, consult your board documentation.
  340. config ZONE_DMA
  341. bool
  342. default y
  343. config GENERIC_ISA_DMA
  344. bool
  345. depends on PPC64 || POWER4 || 6xx && !CPM2
  346. default y
  347. config PPC_INDIRECT_PCI
  348. bool
  349. depends on PCI
  350. default y if 40x || 44x
  351. default n
  352. config EISA
  353. bool
  354. config SBUS
  355. bool
  356. config FSL_SOC
  357. bool
  358. config FSL_PCI
  359. bool
  360. select PPC_INDIRECT_PCI
  361. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  362. config MCA
  363. bool
  364. config PCI
  365. bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
  366. || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
  367. || PPC_PS3
  368. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  369. && !PPC_85xx && !PPC_86xx
  370. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  371. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  372. select ARCH_SUPPORTS_MSI
  373. help
  374. Find out whether your system includes a PCI bus. PCI is the name of
  375. a bus system, i.e. the way the CPU talks to the other stuff inside
  376. your box. If you say Y here, the kernel will include drivers and
  377. infrastructure code to support PCI bus devices.
  378. config PCI_DOMAINS
  379. def_bool PCI
  380. config PCI_SYSCALL
  381. def_bool PCI
  382. config PCI_QSPAN
  383. bool "QSpan PCI"
  384. depends on !4xx && !CPM2 && 8xx
  385. select PPC_I8259
  386. help
  387. Say Y here if you have a system based on a Motorola 8xx-series
  388. embedded processor with a QSPAN PCI interface, otherwise say N.
  389. config PCI_8260
  390. bool
  391. depends on PCI && 8260
  392. select PPC_INDIRECT_PCI
  393. default y
  394. config 8260_PCI9
  395. bool "Enable workaround for MPC826x erratum PCI 9"
  396. depends on PCI_8260 && !8272
  397. default y
  398. choice
  399. prompt "IDMA channel for PCI 9 workaround"
  400. depends on 8260_PCI9
  401. config 8260_PCI9_IDMA1
  402. bool "IDMA1"
  403. config 8260_PCI9_IDMA2
  404. bool "IDMA2"
  405. config 8260_PCI9_IDMA3
  406. bool "IDMA3"
  407. config 8260_PCI9_IDMA4
  408. bool "IDMA4"
  409. endchoice
  410. source "drivers/pci/pcie/Kconfig"
  411. source "drivers/pci/Kconfig"
  412. source "drivers/pcmcia/Kconfig"
  413. source "drivers/pci/hotplug/Kconfig"
  414. endmenu
  415. menu "Advanced setup"
  416. depends on PPC32
  417. config ADVANCED_OPTIONS
  418. bool "Prompt for advanced kernel configuration options"
  419. help
  420. This option will enable prompting for a variety of advanced kernel
  421. configuration options. These options can cause the kernel to not
  422. work if they are set incorrectly, but can be used to optimize certain
  423. aspects of kernel memory management.
  424. Unless you know what you are doing, say N here.
  425. comment "Default settings for advanced configuration options are used"
  426. depends on !ADVANCED_OPTIONS
  427. config HIGHMEM_START_BOOL
  428. bool "Set high memory pool address"
  429. depends on ADVANCED_OPTIONS && HIGHMEM
  430. help
  431. This option allows you to set the base address of the kernel virtual
  432. area used to map high memory pages. This can be useful in
  433. optimizing the layout of kernel virtual memory.
  434. Say N here unless you know what you are doing.
  435. config HIGHMEM_START
  436. hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
  437. default "0xfe000000"
  438. config LOWMEM_SIZE_BOOL
  439. bool "Set maximum low memory"
  440. depends on ADVANCED_OPTIONS
  441. help
  442. This option allows you to set the maximum amount of memory which
  443. will be used as "low memory", that is, memory which the kernel can
  444. access directly, without having to set up a kernel virtual mapping.
  445. This can be useful in optimizing the layout of kernel virtual
  446. memory.
  447. Say N here unless you know what you are doing.
  448. config LOWMEM_SIZE
  449. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  450. default "0x30000000"
  451. config KERNEL_START_BOOL
  452. bool "Set custom kernel base address"
  453. depends on ADVANCED_OPTIONS
  454. help
  455. This option allows you to set the kernel virtual address at which
  456. the kernel will map low memory (the kernel image will be linked at
  457. this address). This can be useful in optimizing the virtual memory
  458. layout of the system.
  459. Say N here unless you know what you are doing.
  460. config KERNEL_START
  461. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  462. default "0xc0000000"
  463. config TASK_SIZE_BOOL
  464. bool "Set custom user task size"
  465. depends on ADVANCED_OPTIONS
  466. help
  467. This option allows you to set the amount of virtual address space
  468. allocated to user tasks. This can be useful in optimizing the
  469. virtual memory layout of the system.
  470. Say N here unless you know what you are doing.
  471. config TASK_SIZE
  472. hex "Size of user task space" if TASK_SIZE_BOOL
  473. default "0x80000000" if PPC_PREP || PPC_8xx
  474. default "0xc0000000"
  475. config CONSISTENT_START_BOOL
  476. bool "Set custom consistent memory pool address"
  477. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  478. help
  479. This option allows you to set the base virtual address
  480. of the consistent memory pool. This pool of virtual
  481. memory is used to make consistent memory allocations.
  482. config CONSISTENT_START
  483. hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
  484. default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
  485. default "0xff100000" if NOT_COHERENT_CACHE
  486. config CONSISTENT_SIZE_BOOL
  487. bool "Set custom consistent memory pool size"
  488. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  489. help
  490. This option allows you to set the size of the
  491. consistent memory pool. This pool of virtual memory
  492. is used to make consistent memory allocations.
  493. config CONSISTENT_SIZE
  494. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  495. default "0x00200000" if NOT_COHERENT_CACHE
  496. config BOOT_LOAD_BOOL
  497. bool "Set the boot link/load address"
  498. depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
  499. help
  500. This option allows you to set the initial load address of the zImage
  501. or zImage.initrd file. This can be useful if you are on a board
  502. which has a small amount of memory.
  503. Say N here unless you know what you are doing.
  504. config BOOT_LOAD
  505. hex "Link/load address for booting" if BOOT_LOAD_BOOL
  506. default "0x00400000" if 40x || 8xx || 8260
  507. default "0x01000000" if 44x
  508. default "0x00800000"
  509. config PIN_TLB
  510. bool "Pinned Kernel TLBs (860 ONLY)"
  511. depends on ADVANCED_OPTIONS && 8xx
  512. endmenu
  513. if PPC64
  514. config KERNEL_START
  515. hex
  516. default "0xc000000000000000"
  517. endif
  518. source "net/Kconfig"
  519. source "drivers/Kconfig"
  520. source "fs/Kconfig"
  521. # XXX source "arch/ppc/8xx_io/Kconfig"
  522. # XXX source "arch/ppc/8260_io/Kconfig"
  523. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  524. source "lib/Kconfig"
  525. menu "Instrumentation Support"
  526. depends on EXPERIMENTAL
  527. source "arch/powerpc/oprofile/Kconfig"
  528. config KPROBES
  529. bool "Kprobes"
  530. depends on !BOOKE && !4xx && KALLSYMS && MODULES
  531. help
  532. Kprobes allows you to trap at almost any kernel address and
  533. execute a callback function. register_kprobe() establishes
  534. a probepoint and specifies the callback. Kprobes is useful
  535. for kernel debugging, non-intrusive instrumentation and testing.
  536. If in doubt, say "N".
  537. endmenu
  538. source "arch/powerpc/Kconfig.debug"
  539. source "security/Kconfig"
  540. config KEYS_COMPAT
  541. bool
  542. depends on COMPAT && KEYS
  543. default y
  544. source "crypto/Kconfig"
  545. config PPC_CLOCK
  546. bool
  547. default n