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 HAVE_SETUP_PER_CPU_AREA
  33. def_bool PPC64
  34. config IRQ_PER_CPU
  35. bool
  36. default y
  37. config RWSEM_GENERIC_SPINLOCK
  38. bool
  39. config RWSEM_XCHGADD_ALGORITHM
  40. bool
  41. default y
  42. config GENERIC_LOCKBREAK
  43. bool
  44. default y
  45. depends on SMP && PREEMPT
  46. config ARCH_HAS_ILOG2_U32
  47. bool
  48. default y
  49. config ARCH_HAS_ILOG2_U64
  50. bool
  51. default y if 64BIT
  52. config GENERIC_HWEIGHT
  53. bool
  54. default y
  55. config GENERIC_CALIBRATE_DELAY
  56. bool
  57. default y
  58. config GENERIC_FIND_NEXT_BIT
  59. bool
  60. default y
  61. config ARCH_NO_VIRT_TO_BUS
  62. def_bool PPC64
  63. config PPC
  64. bool
  65. default y
  66. select HAVE_IDE
  67. select HAVE_OPROFILE
  68. select HAVE_KPROBES
  69. config EARLY_PRINTK
  70. bool
  71. default y
  72. config COMPAT
  73. bool
  74. default y if PPC64
  75. select COMPAT_BINFMT_ELF
  76. config SYSVIPC_COMPAT
  77. bool
  78. depends on COMPAT && SYSVIPC
  79. default y
  80. # All PPC32s use generic nvram driver through ppc_md
  81. config GENERIC_NVRAM
  82. bool
  83. default y if PPC32
  84. config SCHED_NO_NO_OMIT_FRAME_POINTER
  85. bool
  86. default y
  87. config ARCH_MAY_HAVE_PC_FDC
  88. bool
  89. default !PPC_PSERIES || PCI
  90. config PPC_OF
  91. def_bool y
  92. config OF
  93. def_bool y
  94. config PPC_UDBG_16550
  95. bool
  96. default n
  97. config GENERIC_TBSYNC
  98. bool
  99. default y if PPC32 && SMP
  100. default n
  101. config AUDIT_ARCH
  102. bool
  103. default y
  104. config GENERIC_BUG
  105. bool
  106. default y
  107. depends on BUG
  108. config SYS_SUPPORTS_APM_EMULATION
  109. default y if PMAC_APM_EMU
  110. bool
  111. config DEFAULT_UIMAGE
  112. bool
  113. help
  114. Used to allow a board to specify it wants a uImage built by default
  115. default n
  116. config REDBOOT
  117. bool
  118. config HIBERNATE_32
  119. bool
  120. depends on (PPC_PMAC && !SMP) || BROKEN
  121. default y
  122. config HIBERNATE_64
  123. bool
  124. depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
  125. default y
  126. config ARCH_HIBERNATION_POSSIBLE
  127. bool
  128. depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
  129. default y
  130. config ARCH_SUSPEND_POSSIBLE
  131. def_bool y
  132. depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200
  133. config PPC_DCR_NATIVE
  134. bool
  135. default n
  136. config PPC_DCR_MMIO
  137. bool
  138. default n
  139. config PPC_DCR
  140. bool
  141. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  142. default y
  143. config PPC_OF_PLATFORM_PCI
  144. bool
  145. depends on PCI
  146. depends on PPC64 # not supported on 32 bits yet
  147. default n
  148. source "init/Kconfig"
  149. source "arch/powerpc/sysdev/Kconfig"
  150. source "arch/powerpc/platforms/Kconfig"
  151. menu "Kernel options"
  152. config HIGHMEM
  153. bool "High memory support"
  154. depends on PPC32
  155. source kernel/time/Kconfig
  156. source kernel/Kconfig.hz
  157. source kernel/Kconfig.preempt
  158. source "fs/Kconfig.binfmt"
  159. # We optimistically allocate largepages from the VM, so make the limit
  160. # large enough (16MB). This badly named config option is actually
  161. # max order + 1
  162. config FORCE_MAX_ZONEORDER
  163. int
  164. depends on PPC64
  165. default "9" if PPC_64K_PAGES
  166. default "13"
  167. config HUGETLB_PAGE_SIZE_VARIABLE
  168. bool
  169. depends on HUGETLB_PAGE
  170. default y
  171. config MATH_EMULATION
  172. bool "Math emulation"
  173. depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
  174. ---help---
  175. Some PowerPC chips designed for embedded applications do not have
  176. a floating-point unit and therefore do not implement the
  177. floating-point instructions in the PowerPC instruction set. If you
  178. say Y here, the kernel will include code to emulate a floating-point
  179. unit, which will allow programs that use floating-point
  180. instructions to run.
  181. config 8XX_MINIMAL_FPEMU
  182. bool "Minimal math emulation for 8xx"
  183. depends on 8xx && !MATH_EMULATION
  184. help
  185. Older arch/ppc kernels still emulated a few floating point
  186. instructions such as load and store, even when full math
  187. emulation is disabled. Say "Y" here if you want to preserve
  188. this behavior.
  189. It is recommended that you build a soft-float userspace instead.
  190. config IOMMU_VMERGE
  191. bool "Enable IOMMU virtual merging"
  192. depends on PPC64
  193. default y
  194. help
  195. Cause IO segments sent to a device for DMA to be merged virtually
  196. by the IOMMU when they happen to have been allocated contiguously.
  197. This doesn't add pressure to the IOMMU allocator. However, some
  198. drivers don't support getting large merged segments coming back
  199. from *_map_sg().
  200. Most drivers don't have this problem; it is safe to say Y here.
  201. config IOMMU_HELPER
  202. def_bool PPC64
  203. config HOTPLUG_CPU
  204. bool "Support for enabling/disabling CPUs"
  205. depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
  206. ---help---
  207. Say Y here to be able to disable and re-enable individual
  208. CPUs at runtime on SMP machines.
  209. Say N if you are unsure.
  210. config ARCH_ENABLE_MEMORY_HOTPLUG
  211. def_bool y
  212. config ARCH_HAS_WALK_MEMORY
  213. def_bool y
  214. config ARCH_ENABLE_MEMORY_HOTREMOVE
  215. def_bool y
  216. config KEXEC
  217. bool "kexec system call (EXPERIMENTAL)"
  218. depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
  219. help
  220. kexec is a system call that implements the ability to shutdown your
  221. current kernel, and to start another kernel. It is like a reboot
  222. but it is independent of the system firmware. And like a reboot
  223. you can start any kernel with it, not just Linux.
  224. The name comes from the similarity to the exec system call.
  225. It is an ongoing process to be certain the hardware in a machine
  226. is properly shutdown, so do not be surprised if this code does not
  227. initially work for you. It may help to enable device hotplugging
  228. support. As of this writing the exact hardware interface is
  229. strongly in flux, so no good recommendation can be made.
  230. config CRASH_DUMP
  231. bool "Build a kdump crash kernel (EXPERIMENTAL)"
  232. depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
  233. help
  234. Build a kernel suitable for use as a kdump capture kernel.
  235. The kernel will be linked at a different address than normal, and
  236. so can only be used for Kdump.
  237. Don't change this unless you know what you are doing.
  238. config PPCBUG_NVRAM
  239. bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
  240. default y if PPC_PREP
  241. config IRQ_ALL_CPUS
  242. bool "Distribute interrupts on all CPUs by default"
  243. depends on SMP && !MV64360
  244. help
  245. This option gives the kernel permission to distribute IRQs across
  246. multiple CPUs. Saying N here will route all IRQs to the first
  247. CPU. Generally saying Y is safe, although some problems have been
  248. reported with SMP Power Macintoshes with this option enabled.
  249. config NUMA
  250. bool "NUMA support"
  251. depends on PPC64
  252. default y if SMP && PPC_PSERIES
  253. config NODES_SHIFT
  254. int
  255. default "4"
  256. depends on NEED_MULTIPLE_NODES
  257. config ARCH_SELECT_MEMORY_MODEL
  258. def_bool y
  259. depends on PPC64
  260. config ARCH_FLATMEM_ENABLE
  261. def_bool y
  262. depends on (PPC64 && !NUMA) || PPC32
  263. config ARCH_SPARSEMEM_ENABLE
  264. def_bool y
  265. depends on PPC64
  266. select SPARSEMEM_VMEMMAP_ENABLE
  267. config ARCH_SPARSEMEM_DEFAULT
  268. def_bool y
  269. depends on (SMP && PPC_PSERIES) || PPC_PS3
  270. config ARCH_POPULATES_NODE_MAP
  271. def_bool y
  272. source "mm/Kconfig"
  273. config ARCH_MEMORY_PROBE
  274. def_bool y
  275. depends on MEMORY_HOTPLUG
  276. # Some NUMA nodes have memory ranges that span
  277. # other nodes. Even though a pfn is valid and
  278. # between a node's start and end pfns, it may not
  279. # reside on that node. See memmap_init_zone()
  280. # for details.
  281. config NODES_SPAN_OTHER_NODES
  282. def_bool y
  283. depends on NEED_MULTIPLE_NODES
  284. config PPC_HAS_HASH_64K
  285. bool
  286. depends on PPC64
  287. default n
  288. config PPC_64K_PAGES
  289. bool "64k page size"
  290. depends on PPC64
  291. select PPC_HAS_HASH_64K
  292. help
  293. This option changes the kernel logical page size to 64k. On machines
  294. without processor support for 64k pages, the kernel will simulate
  295. them by loading each individual 4k page on demand transparently,
  296. while on hardware with such support, it will be used to map
  297. normal application pages.
  298. config PPC_SUBPAGE_PROT
  299. bool "Support setting protections for 4k subpages"
  300. depends on PPC_64K_PAGES
  301. help
  302. This option adds support for a system call to allow user programs
  303. to set access permissions (read/write, readonly, or no access)
  304. on the 4k subpages of each 64k page.
  305. config SCHED_SMT
  306. bool "SMT (Hyperthreading) scheduler support"
  307. depends on PPC64 && SMP
  308. help
  309. SMT scheduler support improves the CPU scheduler's decision making
  310. when dealing with POWER5 cpus at a cost of slightly increased
  311. overhead in some places. If unsure say N here.
  312. config PROC_DEVICETREE
  313. bool "Support for device tree in /proc"
  314. depends on PROC_FS
  315. help
  316. This option adds a device-tree directory under /proc which contains
  317. an image of the device tree that the kernel copies from Open
  318. Firmware or other boot firmware. If unsure, say Y here.
  319. config CMDLINE_BOOL
  320. bool "Default bootloader kernel arguments"
  321. config CMDLINE
  322. string "Initial kernel command string"
  323. depends on CMDLINE_BOOL
  324. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  325. help
  326. On some platforms, there is currently no way for the boot loader to
  327. pass arguments to the kernel. For these platforms, you can supply
  328. some command-line options at build time by entering them here. In
  329. most cases you will need to specify the root device here.
  330. if !44x || BROKEN
  331. config ARCH_WANTS_FREEZER_CONTROL
  332. def_bool y
  333. depends on ADB_PMU
  334. source kernel/power/Kconfig
  335. endif
  336. config SECCOMP
  337. bool "Enable seccomp to safely compute untrusted bytecode"
  338. depends on PROC_FS
  339. default y
  340. help
  341. This kernel feature is useful for number crunching applications
  342. that may need to compute untrusted bytecode during their
  343. execution. By using pipes or other transports made available to
  344. the process as file descriptors supporting the read/write
  345. syscalls, it's possible to isolate those applications in
  346. their own address space using seccomp. Once seccomp is
  347. enabled via /proc/<pid>/seccomp, it cannot be disabled
  348. and the task is only allowed to execute a few safe syscalls
  349. defined by each seccomp mode.
  350. If unsure, say Y. Only embedded should say N here.
  351. endmenu
  352. config ISA_DMA_API
  353. bool
  354. default !PPC_ISERIES || PCI
  355. menu "Bus options"
  356. config ISA
  357. bool "Support for ISA-bus hardware"
  358. depends on PPC_PREP || PPC_CHRP
  359. select PPC_I8259
  360. help
  361. Find out whether you have ISA slots on your motherboard. ISA is the
  362. name of a bus system, i.e. the way the CPU talks to the other stuff
  363. inside your box. If you have an Apple machine, say N here; if you
  364. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  365. you have an embedded board, consult your board documentation.
  366. config ZONE_DMA
  367. bool
  368. default y
  369. config GENERIC_ISA_DMA
  370. bool
  371. depends on PPC64 || POWER4 || 6xx && !CPM2
  372. default y
  373. config PPC_INDIRECT_PCI
  374. bool
  375. depends on PCI
  376. default y if 40x || 44x
  377. default n
  378. config EISA
  379. bool
  380. config SBUS
  381. bool
  382. config FSL_SOC
  383. bool
  384. config FSL_PCI
  385. bool
  386. select PPC_INDIRECT_PCI
  387. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  388. config MCA
  389. bool
  390. config PCI
  391. bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
  392. || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
  393. || PPC_PS3 || 44x
  394. default y if !40x && !CPM2 && !8xx && !PPC_MPC512x && !PPC_83xx \
  395. && !PPC_85xx && !PPC_86xx
  396. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  397. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  398. select ARCH_SUPPORTS_MSI
  399. help
  400. Find out whether your system includes a PCI bus. PCI is the name of
  401. a bus system, i.e. the way the CPU talks to the other stuff inside
  402. your box. If you say Y here, the kernel will include drivers and
  403. infrastructure code to support PCI bus devices.
  404. config PCI_DOMAINS
  405. def_bool PCI
  406. config PCI_SYSCALL
  407. def_bool PCI
  408. config PCI_QSPAN
  409. bool "QSpan PCI"
  410. depends on !4xx && !CPM2 && 8xx
  411. select PPC_I8259
  412. help
  413. Say Y here if you have a system based on a Motorola 8xx-series
  414. embedded processor with a QSPAN PCI interface, otherwise say N.
  415. config PCI_8260
  416. bool
  417. depends on PCI && 8260
  418. select PPC_INDIRECT_PCI
  419. default y
  420. config 8260_PCI9
  421. bool "Enable workaround for MPC826x erratum PCI 9"
  422. depends on PCI_8260 && !8272
  423. default y
  424. choice
  425. prompt "IDMA channel for PCI 9 workaround"
  426. depends on 8260_PCI9
  427. config 8260_PCI9_IDMA1
  428. bool "IDMA1"
  429. config 8260_PCI9_IDMA2
  430. bool "IDMA2"
  431. config 8260_PCI9_IDMA3
  432. bool "IDMA3"
  433. config 8260_PCI9_IDMA4
  434. bool "IDMA4"
  435. endchoice
  436. source "drivers/pci/pcie/Kconfig"
  437. source "drivers/pci/Kconfig"
  438. source "drivers/pcmcia/Kconfig"
  439. source "drivers/pci/hotplug/Kconfig"
  440. endmenu
  441. menu "Advanced setup"
  442. depends on PPC32
  443. config ADVANCED_OPTIONS
  444. bool "Prompt for advanced kernel configuration options"
  445. help
  446. This option will enable prompting for a variety of advanced kernel
  447. configuration options. These options can cause the kernel to not
  448. work if they are set incorrectly, but can be used to optimize certain
  449. aspects of kernel memory management.
  450. Unless you know what you are doing, say N here.
  451. comment "Default settings for advanced configuration options are used"
  452. depends on !ADVANCED_OPTIONS
  453. config HIGHMEM_START_BOOL
  454. bool "Set high memory pool address"
  455. depends on ADVANCED_OPTIONS && HIGHMEM
  456. help
  457. This option allows you to set the base address of the kernel virtual
  458. area used to map high memory pages. This can be useful in
  459. optimizing the layout of kernel virtual memory.
  460. Say N here unless you know what you are doing.
  461. config HIGHMEM_START
  462. hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
  463. default "0xfe000000"
  464. config LOWMEM_SIZE_BOOL
  465. bool "Set maximum low memory"
  466. depends on ADVANCED_OPTIONS
  467. help
  468. This option allows you to set the maximum amount of memory which
  469. will be used as "low memory", that is, memory which the kernel can
  470. access directly, without having to set up a kernel virtual mapping.
  471. This can be useful in optimizing the layout of kernel virtual
  472. memory.
  473. Say N here unless you know what you are doing.
  474. config LOWMEM_SIZE
  475. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  476. default "0x30000000"
  477. config KERNEL_START_BOOL
  478. bool "Set custom kernel base address"
  479. depends on ADVANCED_OPTIONS
  480. help
  481. This option allows you to set the kernel virtual address at which
  482. the kernel will map low memory (the kernel image will be linked at
  483. this address). This can be useful in optimizing the virtual memory
  484. layout of the system.
  485. Say N here unless you know what you are doing.
  486. config KERNEL_START
  487. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  488. default "0xc0000000"
  489. config TASK_SIZE_BOOL
  490. bool "Set custom user task size"
  491. depends on ADVANCED_OPTIONS
  492. help
  493. This option allows you to set the amount of virtual address space
  494. allocated to user tasks. This can be useful in optimizing the
  495. virtual memory layout of the system.
  496. Say N here unless you know what you are doing.
  497. config TASK_SIZE
  498. hex "Size of user task space" if TASK_SIZE_BOOL
  499. default "0x80000000" if PPC_PREP || PPC_8xx
  500. default "0xc0000000"
  501. config CONSISTENT_START_BOOL
  502. bool "Set custom consistent memory pool address"
  503. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  504. help
  505. This option allows you to set the base virtual address
  506. of the consistent memory pool. This pool of virtual
  507. memory is used to make consistent memory allocations.
  508. config CONSISTENT_START
  509. hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
  510. default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
  511. default "0xff100000" if NOT_COHERENT_CACHE
  512. config CONSISTENT_SIZE_BOOL
  513. bool "Set custom consistent memory pool size"
  514. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  515. help
  516. This option allows you to set the size of the
  517. consistent memory pool. This pool of virtual memory
  518. is used to make consistent memory allocations.
  519. config CONSISTENT_SIZE
  520. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  521. default "0x00200000" if NOT_COHERENT_CACHE
  522. config BOOT_LOAD_BOOL
  523. bool "Set the boot link/load address"
  524. depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
  525. help
  526. This option allows you to set the initial load address of the zImage
  527. or zImage.initrd file. This can be useful if you are on a board
  528. which has a small amount of memory.
  529. Say N here unless you know what you are doing.
  530. config BOOT_LOAD
  531. hex "Link/load address for booting" if BOOT_LOAD_BOOL
  532. default "0x00400000" if 40x || 8xx || 8260
  533. default "0x01000000" if 44x
  534. default "0x00800000"
  535. config PIN_TLB
  536. bool "Pinned Kernel TLBs (860 ONLY)"
  537. depends on ADVANCED_OPTIONS && 8xx
  538. endmenu
  539. if PPC64
  540. config KERNEL_START
  541. hex
  542. default "0xc000000000000000"
  543. endif
  544. source "net/Kconfig"
  545. source "drivers/Kconfig"
  546. source "fs/Kconfig"
  547. # XXX source "arch/ppc/8xx_io/Kconfig"
  548. # XXX source "arch/ppc/8260_io/Kconfig"
  549. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  550. source "lib/Kconfig"
  551. source "arch/powerpc/Kconfig.debug"
  552. source "security/Kconfig"
  553. config KEYS_COMPAT
  554. bool
  555. depends on COMPAT && KEYS
  556. default y
  557. source "crypto/Kconfig"
  558. config PPC_CLOCK
  559. bool
  560. default n
  561. config PPC_LIB_RHEAP
  562. bool