Kconfig 24 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 ARCH_PHYS_ADDR_T_64BIT
  17. def_bool PPC64 || PHYS_64BIT
  18. config MMU
  19. bool
  20. default y
  21. config GENERIC_CMOS_UPDATE
  22. def_bool y
  23. config GENERIC_TIME_VSYSCALL
  24. def_bool y
  25. config GENERIC_CLOCKEVENTS
  26. def_bool y
  27. config GENERIC_HARDIRQS
  28. bool
  29. default y
  30. config GENERIC_HARDIRQS_NO__DO_IRQ
  31. bool
  32. default y
  33. config HAVE_SETUP_PER_CPU_AREA
  34. def_bool PPC64
  35. config NEED_PER_CPU_EMBED_FIRST_CHUNK
  36. def_bool PPC64
  37. config IRQ_PER_CPU
  38. bool
  39. default y
  40. config NR_IRQS
  41. int "Number of virtual interrupt numbers"
  42. range 32 32768
  43. default "512"
  44. help
  45. This defines the number of virtual interrupt numbers the kernel
  46. can manage. Virtual interrupt numbers are what you see in
  47. /proc/interrupts. If you configure your system to have too few,
  48. drivers will fail to load or worse - handle with care.
  49. config STACKTRACE_SUPPORT
  50. bool
  51. default y
  52. config HAVE_LATENCYTOP_SUPPORT
  53. def_bool y
  54. config TRACE_IRQFLAGS_SUPPORT
  55. bool
  56. default y
  57. config LOCKDEP_SUPPORT
  58. bool
  59. default y
  60. config RWSEM_GENERIC_SPINLOCK
  61. bool
  62. config RWSEM_XCHGADD_ALGORITHM
  63. bool
  64. default y
  65. config GENERIC_LOCKBREAK
  66. bool
  67. default y
  68. depends on SMP && PREEMPT
  69. config ARCH_HAS_ILOG2_U32
  70. bool
  71. default y
  72. config ARCH_HAS_ILOG2_U64
  73. bool
  74. default y if 64BIT
  75. config GENERIC_HWEIGHT
  76. bool
  77. default y
  78. config GENERIC_FIND_NEXT_BIT
  79. bool
  80. default y
  81. config GENERIC_GPIO
  82. bool
  83. help
  84. Generic GPIO API support
  85. config ARCH_NO_VIRT_TO_BUS
  86. def_bool PPC64
  87. config PPC
  88. bool
  89. default y
  90. select OF
  91. select OF_FLATTREE
  92. select HAVE_FTRACE_MCOUNT_RECORD
  93. select HAVE_DYNAMIC_FTRACE
  94. select HAVE_FUNCTION_TRACER
  95. select HAVE_FUNCTION_GRAPH_TRACER
  96. select ARCH_WANT_OPTIONAL_GPIOLIB
  97. select HAVE_IDE
  98. select HAVE_IOREMAP_PROT
  99. select HAVE_EFFICIENT_UNALIGNED_ACCESS
  100. select HAVE_KPROBES
  101. select HAVE_ARCH_KGDB
  102. select HAVE_KRETPROBES
  103. select HAVE_ARCH_TRACEHOOK
  104. select HAVE_MEMBLOCK
  105. select HAVE_DMA_ATTRS
  106. select HAVE_DMA_API_DEBUG
  107. select USE_GENERIC_SMP_HELPERS if SMP
  108. select HAVE_OPROFILE
  109. select HAVE_SYSCALL_WRAPPERS if PPC64
  110. select GENERIC_ATOMIC64 if PPC32
  111. select HAVE_PERF_EVENTS
  112. select HAVE_REGS_AND_STACK_ACCESS_API
  113. select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
  114. config EARLY_PRINTK
  115. bool
  116. default y
  117. config COMPAT
  118. bool
  119. default y if PPC64
  120. select COMPAT_BINFMT_ELF
  121. config SYSVIPC_COMPAT
  122. bool
  123. depends on COMPAT && SYSVIPC
  124. default y
  125. # All PPC32s use generic nvram driver through ppc_md
  126. config GENERIC_NVRAM
  127. bool
  128. default y if PPC32
  129. config SCHED_OMIT_FRAME_POINTER
  130. bool
  131. default y
  132. config ARCH_MAY_HAVE_PC_FDC
  133. bool
  134. default !PPC_PSERIES || PCI
  135. config PPC_OF
  136. def_bool y
  137. config PPC_UDBG_16550
  138. bool
  139. default n
  140. config GENERIC_TBSYNC
  141. bool
  142. default y if PPC32 && SMP
  143. default n
  144. config AUDIT_ARCH
  145. bool
  146. default y
  147. config GENERIC_BUG
  148. bool
  149. default y
  150. depends on BUG
  151. config SYS_SUPPORTS_APM_EMULATION
  152. default y if PMAC_APM_EMU
  153. bool
  154. config DEFAULT_UIMAGE
  155. bool
  156. help
  157. Used to allow a board to specify it wants a uImage built by default
  158. default n
  159. config REDBOOT
  160. bool
  161. config ARCH_HIBERNATION_POSSIBLE
  162. bool
  163. default y
  164. config ARCH_SUSPEND_POSSIBLE
  165. def_bool y
  166. depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
  167. PPC_85xx || PPC_86xx || PPC_PSERIES
  168. config PPC_DCR_NATIVE
  169. bool
  170. default n
  171. config PPC_DCR_MMIO
  172. bool
  173. default n
  174. config PPC_DCR
  175. bool
  176. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  177. default y
  178. config PPC_OF_PLATFORM_PCI
  179. bool
  180. depends on PCI
  181. depends on PPC64 # not supported on 32 bits yet
  182. default n
  183. config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  184. def_bool y
  185. config PPC_ADV_DEBUG_REGS
  186. bool
  187. depends on 40x || BOOKE
  188. default y
  189. config PPC_ADV_DEBUG_IACS
  190. int
  191. depends on PPC_ADV_DEBUG_REGS
  192. default 4 if 44x
  193. default 2
  194. config PPC_ADV_DEBUG_DACS
  195. int
  196. depends on PPC_ADV_DEBUG_REGS
  197. default 2
  198. config PPC_ADV_DEBUG_DVCS
  199. int
  200. depends on PPC_ADV_DEBUG_REGS
  201. default 2 if 44x
  202. default 0
  203. config PPC_ADV_DEBUG_DAC_RANGE
  204. bool
  205. depends on PPC_ADV_DEBUG_REGS && 44x
  206. default y
  207. source "init/Kconfig"
  208. source "kernel/Kconfig.freezer"
  209. source "arch/powerpc/sysdev/Kconfig"
  210. source "arch/powerpc/platforms/Kconfig"
  211. menu "Kernel options"
  212. config HIGHMEM
  213. bool "High memory support"
  214. depends on PPC32
  215. source kernel/time/Kconfig
  216. source kernel/Kconfig.hz
  217. source kernel/Kconfig.preempt
  218. source "fs/Kconfig.binfmt"
  219. config HUGETLB_PAGE_SIZE_VARIABLE
  220. bool
  221. depends on HUGETLB_PAGE
  222. default y
  223. config MATH_EMULATION
  224. bool "Math emulation"
  225. depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
  226. ---help---
  227. Some PowerPC chips designed for embedded applications do not have
  228. a floating-point unit and therefore do not implement the
  229. floating-point instructions in the PowerPC instruction set. If you
  230. say Y here, the kernel will include code to emulate a floating-point
  231. unit, which will allow programs that use floating-point
  232. instructions to run.
  233. config 8XX_MINIMAL_FPEMU
  234. bool "Minimal math emulation for 8xx"
  235. depends on 8xx && !MATH_EMULATION
  236. help
  237. Older arch/ppc kernels still emulated a few floating point
  238. instructions such as load and store, even when full math
  239. emulation is disabled. Say "Y" here if you want to preserve
  240. this behavior.
  241. It is recommended that you build a soft-float userspace instead.
  242. config IOMMU_HELPER
  243. def_bool PPC64
  244. config SWIOTLB
  245. bool "SWIOTLB support"
  246. default n
  247. select IOMMU_HELPER
  248. ---help---
  249. Support for IO bounce buffering for systems without an IOMMU.
  250. This allows us to DMA to the full physical address space on
  251. platforms where the size of a physical address is larger
  252. than the bus address. Not all platforms support this.
  253. config HOTPLUG_CPU
  254. bool "Support for enabling/disabling CPUs"
  255. depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
  256. ---help---
  257. Say Y here to be able to disable and re-enable individual
  258. CPUs at runtime on SMP machines.
  259. Say N if you are unsure.
  260. config ARCH_CPU_PROBE_RELEASE
  261. def_bool y
  262. depends on HOTPLUG_CPU
  263. config ARCH_ENABLE_MEMORY_HOTPLUG
  264. def_bool y
  265. config ARCH_HAS_WALK_MEMORY
  266. def_bool y
  267. config ARCH_ENABLE_MEMORY_HOTREMOVE
  268. def_bool y
  269. config KEXEC
  270. bool "kexec system call (EXPERIMENTAL)"
  271. depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
  272. help
  273. kexec is a system call that implements the ability to shutdown your
  274. current kernel, and to start another kernel. It is like a reboot
  275. but it is independent of the system firmware. And like a reboot
  276. you can start any kernel with it, not just Linux.
  277. The name comes from the similarity to the exec system call.
  278. It is an ongoing process to be certain the hardware in a machine
  279. is properly shutdown, so do not be surprised if this code does not
  280. initially work for you. It may help to enable device hotplugging
  281. support. As of this writing the exact hardware interface is
  282. strongly in flux, so no good recommendation can be made.
  283. config CRASH_DUMP
  284. bool "Build a kdump crash kernel"
  285. depends on PPC64 || 6xx || FSL_BOOKE
  286. select RELOCATABLE if PPC64 || FSL_BOOKE
  287. help
  288. Build a kernel suitable for use as a kdump capture kernel.
  289. The same kernel binary can be used as production kernel and dump
  290. capture kernel.
  291. config PHYP_DUMP
  292. bool "Hypervisor-assisted dump (EXPERIMENTAL)"
  293. depends on PPC_PSERIES && EXPERIMENTAL
  294. help
  295. Hypervisor-assisted dump is meant to be a kdump replacement
  296. offering robustness and speed not possible without system
  297. hypervisor assistance.
  298. If unsure, say "N"
  299. config PPCBUG_NVRAM
  300. bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
  301. default y if PPC_PREP
  302. config IRQ_ALL_CPUS
  303. bool "Distribute interrupts on all CPUs by default"
  304. depends on SMP && !MV64360
  305. help
  306. This option gives the kernel permission to distribute IRQs across
  307. multiple CPUs. Saying N here will route all IRQs to the first
  308. CPU. Generally saying Y is safe, although some problems have been
  309. reported with SMP Power Macintoshes with this option enabled.
  310. config SPARSE_IRQ
  311. bool "Support sparse irq numbering"
  312. default n
  313. help
  314. This enables support for sparse irqs. This is useful for distro
  315. kernels that want to define a high CONFIG_NR_CPUS value but still
  316. want to have low kernel memory footprint on smaller machines.
  317. ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
  318. out the irq_desc[] array in a more NUMA-friendly way. )
  319. If you don't know what to do here, say N.
  320. config NUMA
  321. bool "NUMA support"
  322. depends on PPC64
  323. default y if SMP && PPC_PSERIES
  324. config NODES_SHIFT
  325. int
  326. default "8" if PPC64
  327. default "4"
  328. depends on NEED_MULTIPLE_NODES
  329. config MAX_ACTIVE_REGIONS
  330. int
  331. default "256" if PPC64
  332. default "32"
  333. config ARCH_SELECT_MEMORY_MODEL
  334. def_bool y
  335. depends on PPC64
  336. config ARCH_FLATMEM_ENABLE
  337. def_bool y
  338. depends on (PPC64 && !NUMA) || PPC32
  339. config ARCH_SPARSEMEM_ENABLE
  340. def_bool y
  341. depends on PPC64
  342. select SPARSEMEM_VMEMMAP_ENABLE
  343. config ARCH_SPARSEMEM_DEFAULT
  344. def_bool y
  345. depends on (SMP && PPC_PSERIES) || PPC_PS3
  346. config ARCH_POPULATES_NODE_MAP
  347. def_bool y
  348. config SYS_SUPPORTS_HUGETLBFS
  349. def_bool y
  350. depends on PPC_BOOK3S_64
  351. source "mm/Kconfig"
  352. config ARCH_MEMORY_PROBE
  353. def_bool y
  354. depends on MEMORY_HOTPLUG
  355. # Some NUMA nodes have memory ranges that span
  356. # other nodes. Even though a pfn is valid and
  357. # between a node's start and end pfns, it may not
  358. # reside on that node. See memmap_init_zone()
  359. # for details.
  360. config NODES_SPAN_OTHER_NODES
  361. def_bool y
  362. depends on NEED_MULTIPLE_NODES
  363. config PPC_HAS_HASH_64K
  364. bool
  365. depends on PPC64
  366. default n
  367. config STDBINUTILS
  368. bool "Using standard binutils settings"
  369. depends on 44x
  370. default y
  371. help
  372. Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
  373. Note, that kernel will be able to run only those applications,
  374. which had been compiled using binutils later than 2.17.50.0.3 with
  375. '-zmax-page-size' set to 256K (the default is 64K). Or, if using
  376. the older binutils, you can patch them with a trivial patch, which
  377. changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
  378. choice
  379. prompt "Page size"
  380. default PPC_4K_PAGES
  381. help
  382. Select the kernel logical page size. Increasing the page size
  383. will reduce software overhead at each page boundary, allow
  384. hardware prefetch mechanisms to be more effective, and allow
  385. larger dma transfers increasing IO efficiency and reducing
  386. overhead. However the utilization of memory will increase.
  387. For example, each cached file will using a multiple of the
  388. page size to hold its contents and the difference between the
  389. end of file and the end of page is wasted.
  390. Some dedicated systems, such as software raid serving with
  391. accelerated calculations, have shown significant increases.
  392. If you configure a 64 bit kernel for 64k pages but the
  393. processor does not support them, then the kernel will simulate
  394. them with 4k pages, loading them on demand, but with the
  395. reduced software overhead and larger internal fragmentation.
  396. For the 32 bit kernel, a large page option will not be offered
  397. unless it is supported by the configured processor.
  398. If unsure, choose 4K_PAGES.
  399. config PPC_4K_PAGES
  400. bool "4k page size"
  401. config PPC_16K_PAGES
  402. bool "16k page size" if 44x
  403. config PPC_64K_PAGES
  404. bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
  405. select PPC_HAS_HASH_64K if PPC_STD_MMU_64
  406. config PPC_256K_PAGES
  407. bool "256k page size" if 44x
  408. depends on !STDBINUTILS
  409. help
  410. Make the page size 256k.
  411. As the ELF standard only requires alignment to support page
  412. sizes up to 64k, you will need to compile all of your user
  413. space applications with a non-standard binutils settings
  414. (see the STDBINUTILS description for details).
  415. Say N unless you know what you are doing.
  416. endchoice
  417. config FORCE_MAX_ZONEORDER
  418. int "Maximum zone order"
  419. range 9 64 if PPC64 && PPC_64K_PAGES
  420. default "9" if PPC64 && PPC_64K_PAGES
  421. range 13 64 if PPC64 && !PPC_64K_PAGES
  422. default "13" if PPC64 && !PPC_64K_PAGES
  423. range 9 64 if PPC32 && PPC_16K_PAGES
  424. default "9" if PPC32 && PPC_16K_PAGES
  425. range 7 64 if PPC32 && PPC_64K_PAGES
  426. default "7" if PPC32 && PPC_64K_PAGES
  427. range 5 64 if PPC32 && PPC_256K_PAGES
  428. default "5" if PPC32 && PPC_256K_PAGES
  429. range 11 64
  430. default "11"
  431. help
  432. The kernel memory allocator divides physically contiguous memory
  433. blocks into "zones", where each zone is a power of two number of
  434. pages. This option selects the largest power of two that the kernel
  435. keeps in the memory allocator. If you need to allocate very large
  436. blocks of physically contiguous memory, then you may need to
  437. increase this value.
  438. This config option is actually maximum order plus one. For example,
  439. a value of 11 means that the largest free memory block is 2^10 pages.
  440. The page size is not necessarily 4KB. For example, on 64-bit
  441. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  442. this in mind when choosing a value for this option.
  443. config PPC_SUBPAGE_PROT
  444. bool "Support setting protections for 4k subpages"
  445. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  446. help
  447. This option adds support for a system call to allow user programs
  448. to set access permissions (read/write, readonly, or no access)
  449. on the 4k subpages of each 64k page.
  450. config SCHED_SMT
  451. bool "SMT (Hyperthreading) scheduler support"
  452. depends on PPC64 && SMP
  453. help
  454. SMT scheduler support improves the CPU scheduler's decision making
  455. when dealing with POWER5 cpus at a cost of slightly increased
  456. overhead in some places. If unsure say N here.
  457. config CMDLINE_BOOL
  458. bool "Default bootloader kernel arguments"
  459. config CMDLINE
  460. string "Initial kernel command string"
  461. depends on CMDLINE_BOOL
  462. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  463. help
  464. On some platforms, there is currently no way for the boot loader to
  465. pass arguments to the kernel. For these platforms, you can supply
  466. some command-line options at build time by entering them here. In
  467. most cases you will need to specify the root device here.
  468. config EXTRA_TARGETS
  469. string "Additional default image types"
  470. help
  471. List additional targets to be built by the bootwrapper here (separated
  472. by spaces). This is useful for targets that depend of device tree
  473. files in the .dts directory.
  474. Targets in this list will be build as part of the default build
  475. target, or when the user does a 'make zImage' or a
  476. 'make zImage.initrd'.
  477. If unsure, leave blank
  478. if !44x || BROKEN
  479. config ARCH_WANTS_FREEZER_CONTROL
  480. def_bool y
  481. depends on ADB_PMU
  482. source kernel/power/Kconfig
  483. endif
  484. config SECCOMP
  485. bool "Enable seccomp to safely compute untrusted bytecode"
  486. depends on PROC_FS
  487. default y
  488. help
  489. This kernel feature is useful for number crunching applications
  490. that may need to compute untrusted bytecode during their
  491. execution. By using pipes or other transports made available to
  492. the process as file descriptors supporting the read/write
  493. syscalls, it's possible to isolate those applications in
  494. their own address space using seccomp. Once seccomp is
  495. enabled via /proc/<pid>/seccomp, it cannot be disabled
  496. and the task is only allowed to execute a few safe syscalls
  497. defined by each seccomp mode.
  498. If unsure, say Y. Only embedded should say N here.
  499. endmenu
  500. config ISA_DMA_API
  501. bool
  502. default !PPC_ISERIES || PCI
  503. menu "Bus options"
  504. config ISA
  505. bool "Support for ISA-bus hardware"
  506. depends on PPC_PREP || PPC_CHRP
  507. select PPC_I8259
  508. help
  509. Find out whether you have ISA slots on your motherboard. ISA is the
  510. name of a bus system, i.e. the way the CPU talks to the other stuff
  511. inside your box. If you have an Apple machine, say N here; if you
  512. have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
  513. you have an embedded board, consult your board documentation.
  514. config ZONE_DMA
  515. bool
  516. default y
  517. config NEED_DMA_MAP_STATE
  518. def_bool (PPC64 || NOT_COHERENT_CACHE)
  519. config NEED_SG_DMA_LENGTH
  520. def_bool y
  521. config GENERIC_ISA_DMA
  522. bool
  523. depends on ISA_DMA_API
  524. default y
  525. config PPC_INDIRECT_PCI
  526. bool
  527. depends on PCI
  528. default y if 40x || 44x
  529. default n
  530. config EISA
  531. bool
  532. config SBUS
  533. bool
  534. config FSL_SOC
  535. bool
  536. config FSL_PCI
  537. bool
  538. select PPC_INDIRECT_PCI
  539. select PCI_QUIRKS
  540. config FSL_PMC
  541. bool
  542. default y
  543. depends on SUSPEND && (PPC_85xx || PPC_86xx)
  544. help
  545. Freescale MPC85xx/MPC86xx power management controller support
  546. (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
  547. config 4xx_SOC
  548. bool
  549. config FSL_LBC
  550. bool
  551. help
  552. Freescale Localbus support
  553. config FSL_GTM
  554. bool
  555. depends on PPC_83xx || QUICC_ENGINE || CPM2
  556. help
  557. Freescale General-purpose Timers support
  558. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  559. config MCA
  560. bool
  561. # Platforms that what PCI turned unconditionally just do select PCI
  562. # in their config node. Platforms that want to choose at config
  563. # time should select PPC_PCI_CHOICE
  564. config PPC_PCI_CHOICE
  565. bool
  566. config PCI
  567. bool "PCI support" if PPC_PCI_CHOICE
  568. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  569. && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
  570. default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
  571. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  572. select ARCH_SUPPORTS_MSI
  573. help
  574. Find out whether your system includes a PCI bus. PCI is the name of
  575. a bus system, i.e. the way the CPU talks to the other stuff inside
  576. your box. If you say Y here, the kernel will include drivers and
  577. infrastructure code to support PCI bus devices.
  578. config PCI_DOMAINS
  579. def_bool PCI
  580. config PCI_SYSCALL
  581. def_bool PCI
  582. config PCI_QSPAN
  583. bool "QSpan PCI"
  584. depends on !4xx && !CPM2 && 8xx
  585. select PPC_I8259
  586. help
  587. Say Y here if you have a system based on a Motorola 8xx-series
  588. embedded processor with a QSPAN PCI interface, otherwise say N.
  589. config PCI_8260
  590. bool
  591. depends on PCI && 8260
  592. select PPC_INDIRECT_PCI
  593. default y
  594. config 8260_PCI9
  595. bool "Enable workaround for MPC826x erratum PCI 9"
  596. depends on PCI_8260 && !8272
  597. default y
  598. choice
  599. prompt "IDMA channel for PCI 9 workaround"
  600. depends on 8260_PCI9
  601. config 8260_PCI9_IDMA1
  602. bool "IDMA1"
  603. config 8260_PCI9_IDMA2
  604. bool "IDMA2"
  605. config 8260_PCI9_IDMA3
  606. bool "IDMA3"
  607. config 8260_PCI9_IDMA4
  608. bool "IDMA4"
  609. endchoice
  610. source "drivers/pci/pcie/Kconfig"
  611. source "drivers/pci/Kconfig"
  612. source "drivers/pcmcia/Kconfig"
  613. source "drivers/pci/hotplug/Kconfig"
  614. config HAS_RAPIDIO
  615. bool
  616. default n
  617. config RAPIDIO
  618. bool "RapidIO support"
  619. depends on HAS_RAPIDIO
  620. help
  621. If you say Y here, the kernel will include drivers and
  622. infrastructure code to support RapidIO interconnect devices.
  623. source "drivers/rapidio/Kconfig"
  624. endmenu
  625. menu "Advanced setup"
  626. depends on PPC32
  627. config ADVANCED_OPTIONS
  628. bool "Prompt for advanced kernel configuration options"
  629. help
  630. This option will enable prompting for a variety of advanced kernel
  631. configuration options. These options can cause the kernel to not
  632. work if they are set incorrectly, but can be used to optimize certain
  633. aspects of kernel memory management.
  634. Unless you know what you are doing, say N here.
  635. comment "Default settings for advanced configuration options are used"
  636. depends on !ADVANCED_OPTIONS
  637. config LOWMEM_SIZE_BOOL
  638. bool "Set maximum low memory"
  639. depends on ADVANCED_OPTIONS
  640. help
  641. This option allows you to set the maximum amount of memory which
  642. will be used as "low memory", that is, memory which the kernel can
  643. access directly, without having to set up a kernel virtual mapping.
  644. This can be useful in optimizing the layout of kernel virtual
  645. memory.
  646. Say N here unless you know what you are doing.
  647. config LOWMEM_SIZE
  648. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  649. default "0x30000000"
  650. config LOWMEM_CAM_NUM_BOOL
  651. bool "Set number of CAMs to use to map low memory"
  652. depends on ADVANCED_OPTIONS && FSL_BOOKE
  653. help
  654. This option allows you to set the maximum number of CAM slots that
  655. will be used to map low memory. There are a limited number of slots
  656. available and even more limited number that will fit in the L1 MMU.
  657. However, using more entries will allow mapping more low memory. This
  658. can be useful in optimizing the layout of kernel virtual memory.
  659. Say N here unless you know what you are doing.
  660. config LOWMEM_CAM_NUM
  661. depends on FSL_BOOKE
  662. int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  663. default 3
  664. config RELOCATABLE
  665. bool "Build a relocatable kernel (EXPERIMENTAL)"
  666. depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  667. help
  668. This builds a kernel image that is capable of running at the
  669. location the kernel is loaded at (some alignment restrictions may
  670. exist).
  671. One use is for the kexec on panic case where the recovery kernel
  672. must live at a different physical address than the primary
  673. kernel.
  674. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  675. it has been loaded at and the compile time physical addresses
  676. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  677. setting can still be useful to bootwrappers that need to know the
  678. load location of the kernel (eg. u-boot/mkimage).
  679. config PAGE_OFFSET_BOOL
  680. bool "Set custom page offset address"
  681. depends on ADVANCED_OPTIONS
  682. help
  683. This option allows you to set the kernel virtual address at which
  684. the kernel will map low memory. This can be useful in optimizing
  685. the virtual memory layout of the system.
  686. Say N here unless you know what you are doing.
  687. config PAGE_OFFSET
  688. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  689. default "0xc0000000"
  690. config KERNEL_START_BOOL
  691. bool "Set custom kernel base address"
  692. depends on ADVANCED_OPTIONS
  693. help
  694. This option allows you to set the kernel virtual address at which
  695. the kernel will be loaded. Normally this should match PAGE_OFFSET
  696. however there are times (like kdump) that one might not want them
  697. to be the same.
  698. Say N here unless you know what you are doing.
  699. config KERNEL_START
  700. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  701. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  702. default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
  703. default "0xc0000000"
  704. config PHYSICAL_START_BOOL
  705. bool "Set physical address where the kernel is loaded"
  706. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  707. help
  708. This gives the physical address where the kernel is loaded.
  709. Say N here unless you know what you are doing.
  710. config PHYSICAL_START
  711. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  712. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
  713. default "0x00000000"
  714. config PHYSICAL_ALIGN
  715. hex
  716. default "0x04000000" if FSL_BOOKE
  717. help
  718. This value puts the alignment restrictions on physical address
  719. where kernel is loaded and run from. Kernel is compiled for an
  720. address which meets above alignment restriction.
  721. config TASK_SIZE_BOOL
  722. bool "Set custom user task size"
  723. depends on ADVANCED_OPTIONS
  724. help
  725. This option allows you to set the amount of virtual address space
  726. allocated to user tasks. This can be useful in optimizing the
  727. virtual memory layout of the system.
  728. Say N here unless you know what you are doing.
  729. config TASK_SIZE
  730. hex "Size of user task space" if TASK_SIZE_BOOL
  731. default "0x80000000" if PPC_PREP || PPC_8xx
  732. default "0xc0000000"
  733. config CONSISTENT_SIZE_BOOL
  734. bool "Set custom consistent memory pool size"
  735. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  736. help
  737. This option allows you to set the size of the
  738. consistent memory pool. This pool of virtual memory
  739. is used to make consistent memory allocations.
  740. config CONSISTENT_SIZE
  741. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  742. default "0x00200000" if NOT_COHERENT_CACHE
  743. config PIN_TLB
  744. bool "Pinned Kernel TLBs (860 ONLY)"
  745. depends on ADVANCED_OPTIONS && 8xx
  746. endmenu
  747. if PPC64
  748. config RELOCATABLE
  749. bool "Build a relocatable kernel"
  750. help
  751. This builds a kernel image that is capable of running anywhere
  752. in the RMA (real memory area) at any 16k-aligned base address.
  753. The kernel is linked as a position-independent executable (PIE)
  754. and contains dynamic relocations which are processed early
  755. in the bootup process.
  756. One use is for the kexec on panic case where the recovery kernel
  757. must live at a different physical address than the primary
  758. kernel.
  759. config PAGE_OFFSET
  760. hex
  761. default "0xc000000000000000"
  762. config KERNEL_START
  763. hex
  764. default "0xc000000000000000"
  765. config PHYSICAL_START
  766. hex
  767. default "0x00000000"
  768. endif
  769. source "net/Kconfig"
  770. source "drivers/Kconfig"
  771. source "fs/Kconfig"
  772. source "arch/powerpc/sysdev/qe_lib/Kconfig"
  773. source "lib/Kconfig"
  774. source "arch/powerpc/Kconfig.debug"
  775. source "security/Kconfig"
  776. config KEYS_COMPAT
  777. bool
  778. depends on COMPAT && KEYS
  779. default y
  780. source "crypto/Kconfig"
  781. config PPC_CLOCK
  782. bool
  783. default n
  784. select HAVE_CLK
  785. config PPC_LIB_RHEAP
  786. bool
  787. source "arch/powerpc/kvm/Kconfig"