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