Kconfig 29 KB

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  1. source "arch/powerpc/platforms/Kconfig.cputype"
  2. config PPC32
  3. bool
  4. default y if !PPC64
  5. config 32BIT
  6. bool
  7. default y if PPC32
  8. config 64BIT
  9. bool
  10. default y if PPC64
  11. config ARCH_PHYS_ADDR_T_64BIT
  12. def_bool PPC64 || PHYS_64BIT
  13. config ARCH_DMA_ADDR_T_64BIT
  14. def_bool ARCH_PHYS_ADDR_T_64BIT
  15. config MMU
  16. bool
  17. default y
  18. config HAVE_SETUP_PER_CPU_AREA
  19. def_bool PPC64
  20. config NEED_PER_CPU_EMBED_FIRST_CHUNK
  21. def_bool PPC64
  22. config NR_IRQS
  23. int "Number of virtual interrupt numbers"
  24. range 32 32768
  25. default "512"
  26. help
  27. This defines the number of virtual interrupt numbers the kernel
  28. can manage. Virtual interrupt numbers are what you see in
  29. /proc/interrupts. If you configure your system to have too few,
  30. drivers will fail to load or worse - handle with care.
  31. config STACKTRACE_SUPPORT
  32. bool
  33. default y
  34. config TRACE_IRQFLAGS_SUPPORT
  35. bool
  36. default y
  37. config LOCKDEP_SUPPORT
  38. bool
  39. default y
  40. config RWSEM_GENERIC_SPINLOCK
  41. bool
  42. config RWSEM_XCHGADD_ALGORITHM
  43. bool
  44. default y
  45. config GENERIC_LOCKBREAK
  46. bool
  47. default y
  48. depends on SMP && PREEMPT
  49. config ARCH_HAS_ILOG2_U32
  50. bool
  51. default y
  52. config ARCH_HAS_ILOG2_U64
  53. bool
  54. default y if 64BIT
  55. config GENERIC_HWEIGHT
  56. bool
  57. default y
  58. config ARCH_HAS_DMA_SET_COHERENT_MASK
  59. bool
  60. config PPC
  61. bool
  62. default y
  63. select ARCH_MIGHT_HAVE_PC_PARPORT
  64. select ARCH_MIGHT_HAVE_PC_SERIO
  65. select BINFMT_ELF
  66. select ARCH_HAS_ELF_RANDOMIZE
  67. select OF
  68. select OF_EARLY_FLATTREE
  69. select OF_RESERVED_MEM
  70. select HAVE_FTRACE_MCOUNT_RECORD
  71. select HAVE_DYNAMIC_FTRACE
  72. select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
  73. select HAVE_FUNCTION_TRACER
  74. select HAVE_FUNCTION_GRAPH_TRACER
  75. select SYSCTL_EXCEPTION_TRACE
  76. select VIRT_TO_BUS if !PPC64
  77. select HAVE_IDE
  78. select HAVE_IOREMAP_PROT
  79. select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
  80. select HAVE_KPROBES
  81. select HAVE_ARCH_KGDB
  82. select HAVE_KRETPROBES
  83. select HAVE_ARCH_TRACEHOOK
  84. select HAVE_MEMBLOCK
  85. select HAVE_MEMBLOCK_NODE_MAP
  86. select HAVE_DMA_API_DEBUG
  87. select HAVE_OPROFILE
  88. select HAVE_DEBUG_KMEMLEAK
  89. select ARCH_HAS_SG_CHAIN
  90. select GENERIC_ATOMIC64 if PPC32
  91. select HAVE_PERF_EVENTS
  92. select HAVE_PERF_REGS
  93. select HAVE_PERF_USER_STACK_DUMP
  94. select HAVE_REGS_AND_STACK_ACCESS_API
  95. select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
  96. select ARCH_WANT_IPC_PARSE_VERSION
  97. select SPARSE_IRQ
  98. select IRQ_DOMAIN
  99. select GENERIC_IRQ_SHOW
  100. select GENERIC_IRQ_SHOW_LEVEL
  101. select IRQ_FORCED_THREADING
  102. select HAVE_RCU_TABLE_FREE if SMP
  103. select HAVE_SYSCALL_TRACEPOINTS
  104. select HAVE_CBPF_JIT if !PPC64
  105. select HAVE_EBPF_JIT if PPC64
  106. select HAVE_ARCH_JUMP_LABEL
  107. select ARCH_HAVE_NMI_SAFE_CMPXCHG
  108. select ARCH_HAS_GCOV_PROFILE_ALL
  109. select GENERIC_SMP_IDLE_THREAD
  110. select GENERIC_CMOS_UPDATE
  111. select GENERIC_CPU_VULNERABILITIES if PPC_BOOK3S_64
  112. select GENERIC_TIME_VSYSCALL_OLD
  113. select GENERIC_CLOCKEVENTS
  114. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  115. select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  116. select GENERIC_STRNCPY_FROM_USER
  117. select GENERIC_STRNLEN_USER
  118. select HAVE_MOD_ARCH_SPECIFIC
  119. select MODULES_USE_ELF_RELA
  120. select CLONE_BACKWARDS
  121. select ARCH_USE_BUILTIN_BSWAP
  122. select OLD_SIGSUSPEND
  123. select OLD_SIGACTION if PPC32
  124. select HAVE_DEBUG_STACKOVERFLOW
  125. select HAVE_IRQ_EXIT_ON_IRQ_STACK
  126. select ARCH_USE_CMPXCHG_LOCKREF if PPC64
  127. select HAVE_ARCH_AUDITSYSCALL
  128. select ARCH_SUPPORTS_ATOMIC_RMW
  129. select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
  130. select NO_BOOTMEM
  131. select HAVE_GENERIC_RCU_GUP
  132. select HAVE_PERF_EVENTS_NMI if PPC64
  133. select HAVE_NMI if PERF_EVENTS
  134. select EDAC_SUPPORT
  135. select EDAC_ATOMIC_SCRUB
  136. select ARCH_HAS_DMA_SET_COHERENT_MASK
  137. select ARCH_HAS_DEVMEM_IS_ALLOWED
  138. select HAVE_ARCH_SECCOMP_FILTER
  139. select ARCH_HAS_UBSAN_SANITIZE_ALL
  140. select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
  141. select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
  142. select GENERIC_CPU_AUTOPROBE
  143. select HAVE_VIRT_CPU_ACCOUNTING
  144. select HAVE_ARCH_HARDENED_USERCOPY
  145. select HAVE_KERNEL_GZIP
  146. config GENERIC_CSUM
  147. def_bool CPU_LITTLE_ENDIAN
  148. config EARLY_PRINTK
  149. bool
  150. default y
  151. config PANIC_TIMEOUT
  152. int
  153. default 180
  154. config COMPAT
  155. bool
  156. default y if PPC64
  157. select COMPAT_BINFMT_ELF
  158. select ARCH_WANT_OLD_COMPAT_IPC
  159. select COMPAT_OLD_SIGACTION
  160. config SYSVIPC_COMPAT
  161. bool
  162. depends on COMPAT && SYSVIPC
  163. default y
  164. # All PPC32s use generic nvram driver through ppc_md
  165. config GENERIC_NVRAM
  166. bool
  167. default y if PPC32
  168. config SCHED_OMIT_FRAME_POINTER
  169. bool
  170. default y
  171. config ARCH_MAY_HAVE_PC_FDC
  172. bool
  173. default PCI
  174. config PPC_UDBG_16550
  175. bool
  176. default n
  177. config GENERIC_TBSYNC
  178. bool
  179. default y if PPC32 && SMP
  180. default n
  181. config AUDIT_ARCH
  182. bool
  183. default y
  184. config GENERIC_BUG
  185. bool
  186. default y
  187. depends on BUG
  188. config SYS_SUPPORTS_APM_EMULATION
  189. default y if PMAC_APM_EMU
  190. bool
  191. config EPAPR_BOOT
  192. bool
  193. help
  194. Used to allow a board to specify it wants an ePAPR compliant wrapper.
  195. default n
  196. config DEFAULT_UIMAGE
  197. bool
  198. help
  199. Used to allow a board to specify it wants a uImage built by default
  200. default n
  201. config ARCH_HIBERNATION_POSSIBLE
  202. bool
  203. default y
  204. config ARCH_SUSPEND_POSSIBLE
  205. def_bool y
  206. depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
  207. (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
  208. || 44x || 40x
  209. config PPC_DCR_NATIVE
  210. bool
  211. default n
  212. config PPC_DCR_MMIO
  213. bool
  214. default n
  215. config PPC_DCR
  216. bool
  217. depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
  218. default y
  219. config PPC_OF_PLATFORM_PCI
  220. bool
  221. depends on PCI
  222. depends on PPC64 # not supported on 32 bits yet
  223. default n
  224. config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  225. depends on PPC32 || PPC_STD_MMU_64
  226. def_bool y
  227. config ARCH_SUPPORTS_UPROBES
  228. def_bool y
  229. config PPC_ADV_DEBUG_REGS
  230. bool
  231. depends on 40x || BOOKE
  232. default y
  233. config PPC_ADV_DEBUG_IACS
  234. int
  235. depends on PPC_ADV_DEBUG_REGS
  236. default 4 if 44x
  237. default 2
  238. config PPC_ADV_DEBUG_DACS
  239. int
  240. depends on PPC_ADV_DEBUG_REGS
  241. default 2
  242. config PPC_ADV_DEBUG_DVCS
  243. int
  244. depends on PPC_ADV_DEBUG_REGS
  245. default 2 if 44x
  246. default 0
  247. config PPC_ADV_DEBUG_DAC_RANGE
  248. bool
  249. depends on PPC_ADV_DEBUG_REGS && 44x
  250. default y
  251. config PPC_EMULATE_SSTEP
  252. bool
  253. default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
  254. config ZONE_DMA32
  255. bool
  256. default y if PPC64
  257. config PGTABLE_LEVELS
  258. int
  259. default 2 if !PPC64
  260. default 3 if PPC_64K_PAGES && !PPC_BOOK3S_64
  261. default 4
  262. source "init/Kconfig"
  263. source "kernel/Kconfig.freezer"
  264. source "arch/powerpc/sysdev/Kconfig"
  265. source "arch/powerpc/platforms/Kconfig"
  266. menu "Kernel options"
  267. config HIGHMEM
  268. bool "High memory support"
  269. depends on PPC32
  270. source kernel/Kconfig.hz
  271. source kernel/Kconfig.preempt
  272. source "fs/Kconfig.binfmt"
  273. config HUGETLB_PAGE_SIZE_VARIABLE
  274. bool
  275. depends on HUGETLB_PAGE
  276. default y
  277. config MATH_EMULATION
  278. bool "Math emulation"
  279. depends on 4xx || 8xx || PPC_MPC832x || BOOKE
  280. ---help---
  281. Some PowerPC chips designed for embedded applications do not have
  282. a floating-point unit and therefore do not implement the
  283. floating-point instructions in the PowerPC instruction set. If you
  284. say Y here, the kernel will include code to emulate a floating-point
  285. unit, which will allow programs that use floating-point
  286. instructions to run.
  287. This is also useful to emulate missing (optional) instructions
  288. such as fsqrt on cores that do have an FPU but do not implement
  289. them (such as Freescale BookE).
  290. choice
  291. prompt "Math emulation options"
  292. default MATH_EMULATION_FULL
  293. depends on MATH_EMULATION
  294. config MATH_EMULATION_FULL
  295. bool "Emulate all the floating point instructions"
  296. ---help---
  297. Select this option will enable the kernel to support to emulate
  298. all the floating point instructions. If your SoC doesn't have
  299. a FPU, you should select this.
  300. config MATH_EMULATION_HW_UNIMPLEMENTED
  301. bool "Just emulate the FPU unimplemented instructions"
  302. ---help---
  303. Select this if you know there does have a hardware FPU on your
  304. SoC, but some floating point instructions are not implemented by that.
  305. endchoice
  306. config PPC_TRANSACTIONAL_MEM
  307. bool "Transactional Memory support for POWERPC"
  308. depends on PPC_BOOK3S_64
  309. depends on SMP
  310. select ALTIVEC
  311. select VSX
  312. default n
  313. ---help---
  314. Support user-mode Transactional Memory on POWERPC.
  315. config DISABLE_MPROFILE_KERNEL
  316. bool "Disable use of mprofile-kernel for kernel tracing"
  317. depends on PPC64 && CPU_LITTLE_ENDIAN
  318. default y
  319. help
  320. Selecting this options disables use of the mprofile-kernel ABI for
  321. kernel tracing. That will cause options such as live patching
  322. (CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
  323. be disabled also.
  324. If you have a toolchain which supports mprofile-kernel, then you can
  325. disable this. Otherwise leave it enabled. If you're not sure, say
  326. "Y".
  327. config MPROFILE_KERNEL
  328. depends on PPC64 && CPU_LITTLE_ENDIAN
  329. def_bool !DISABLE_MPROFILE_KERNEL
  330. config IOMMU_HELPER
  331. def_bool PPC64
  332. config SWIOTLB
  333. bool "SWIOTLB support"
  334. default n
  335. select IOMMU_HELPER
  336. ---help---
  337. Support for IO bounce buffering for systems without an IOMMU.
  338. This allows us to DMA to the full physical address space on
  339. platforms where the size of a physical address is larger
  340. than the bus address. Not all platforms support this.
  341. config HOTPLUG_CPU
  342. bool "Support for enabling/disabling CPUs"
  343. depends on SMP && (PPC_PSERIES || \
  344. PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE)
  345. ---help---
  346. Say Y here to be able to disable and re-enable individual
  347. CPUs at runtime on SMP machines.
  348. Say N if you are unsure.
  349. config ARCH_CPU_PROBE_RELEASE
  350. def_bool y
  351. depends on HOTPLUG_CPU
  352. config ARCH_ENABLE_MEMORY_HOTPLUG
  353. def_bool y
  354. config ARCH_HAS_WALK_MEMORY
  355. def_bool y
  356. config ARCH_ENABLE_MEMORY_HOTREMOVE
  357. def_bool y
  358. config PPC64_SUPPORTS_MEMORY_FAILURE
  359. bool "Add support for memory hwpoison"
  360. depends on PPC_BOOK3S_64
  361. default "y" if PPC_POWERNV
  362. select ARCH_SUPPORTS_MEMORY_FAILURE
  363. config KEXEC
  364. bool "kexec system call"
  365. depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
  366. select KEXEC_CORE
  367. help
  368. kexec is a system call that implements the ability to shutdown your
  369. current kernel, and to start another kernel. It is like a reboot
  370. but it is independent of the system firmware. And like a reboot
  371. you can start any kernel with it, not just Linux.
  372. The name comes from the similarity to the exec system call.
  373. It is an ongoing process to be certain the hardware in a machine
  374. is properly shutdown, so do not be surprised if this code does not
  375. initially work for you. As of this writing the exact hardware
  376. interface is strongly in flux, so no good recommendation can be
  377. made.
  378. config RELOCATABLE
  379. bool "Build a relocatable kernel"
  380. depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
  381. select NONSTATIC_KERNEL
  382. help
  383. This builds a kernel image that is capable of running at the
  384. location the kernel is loaded at. For ppc32, there is no any
  385. alignment restrictions, and this feature is a superset of
  386. DYNAMIC_MEMSTART and hence overrides it. For ppc64, we should use
  387. 16k-aligned base address. The kernel is linked as a
  388. position-independent executable (PIE) and contains dynamic relocations
  389. which are processed early in the bootup process.
  390. One use is for the kexec on panic case where the recovery kernel
  391. must live at a different physical address than the primary
  392. kernel.
  393. Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
  394. it has been loaded at and the compile time physical addresses
  395. CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
  396. setting can still be useful to bootwrappers that need to know the
  397. load address of the kernel (eg. u-boot/mkimage).
  398. config CRASH_DUMP
  399. bool "Build a kdump crash kernel"
  400. depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
  401. select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
  402. help
  403. Build a kernel suitable for use as a kdump capture kernel.
  404. The same kernel binary can be used as production kernel and dump
  405. capture kernel.
  406. config FA_DUMP
  407. bool "Firmware-assisted dump"
  408. depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
  409. help
  410. A robust mechanism to get reliable kernel crash dump with
  411. assistance from firmware. This approach does not use kexec,
  412. instead firmware assists in booting the kdump kernel
  413. while preserving memory contents. Firmware-assisted dump
  414. is meant to be a kdump replacement offering robustness and
  415. speed not possible without system firmware assistance.
  416. If unsure, say "N"
  417. config IRQ_ALL_CPUS
  418. bool "Distribute interrupts on all CPUs by default"
  419. depends on SMP
  420. help
  421. This option gives the kernel permission to distribute IRQs across
  422. multiple CPUs. Saying N here will route all IRQs to the first
  423. CPU. Generally saying Y is safe, although some problems have been
  424. reported with SMP Power Macintoshes with this option enabled.
  425. config NUMA
  426. bool "NUMA support"
  427. depends on PPC64
  428. default y if SMP && PPC_PSERIES
  429. config NODES_SHIFT
  430. int
  431. default "8" if PPC64
  432. default "4"
  433. depends on NEED_MULTIPLE_NODES
  434. config USE_PERCPU_NUMA_NODE_ID
  435. def_bool y
  436. depends on NUMA
  437. config HAVE_MEMORYLESS_NODES
  438. def_bool y
  439. depends on NUMA
  440. config ARCH_SELECT_MEMORY_MODEL
  441. def_bool y
  442. depends on PPC64
  443. config ARCH_FLATMEM_ENABLE
  444. def_bool y
  445. depends on (PPC64 && !NUMA) || PPC32
  446. config ARCH_SPARSEMEM_ENABLE
  447. def_bool y
  448. depends on PPC64
  449. select SPARSEMEM_VMEMMAP_ENABLE
  450. config ARCH_SPARSEMEM_DEFAULT
  451. def_bool y
  452. depends on (SMP && PPC_PSERIES) || PPC_PS3
  453. config SYS_SUPPORTS_HUGETLBFS
  454. bool
  455. source "mm/Kconfig"
  456. config ARCH_MEMORY_PROBE
  457. def_bool y
  458. depends on MEMORY_HOTPLUG
  459. # Some NUMA nodes have memory ranges that span
  460. # other nodes. Even though a pfn is valid and
  461. # between a node's start and end pfns, it may not
  462. # reside on that node. See memmap_init_zone()
  463. # for details.
  464. config NODES_SPAN_OTHER_NODES
  465. def_bool y
  466. depends on NEED_MULTIPLE_NODES
  467. config STDBINUTILS
  468. bool "Using standard binutils settings"
  469. depends on 44x
  470. default y
  471. help
  472. Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
  473. Note, that kernel will be able to run only those applications,
  474. which had been compiled using binutils later than 2.17.50.0.3 with
  475. '-zmax-page-size' set to 256K (the default is 64K). Or, if using
  476. the older binutils, you can patch them with a trivial patch, which
  477. changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
  478. choice
  479. prompt "Page size"
  480. default PPC_4K_PAGES
  481. help
  482. Select the kernel logical page size. Increasing the page size
  483. will reduce software overhead at each page boundary, allow
  484. hardware prefetch mechanisms to be more effective, and allow
  485. larger dma transfers increasing IO efficiency and reducing
  486. overhead. However the utilization of memory will increase.
  487. For example, each cached file will using a multiple of the
  488. page size to hold its contents and the difference between the
  489. end of file and the end of page is wasted.
  490. Some dedicated systems, such as software raid serving with
  491. accelerated calculations, have shown significant increases.
  492. If you configure a 64 bit kernel for 64k pages but the
  493. processor does not support them, then the kernel will simulate
  494. them with 4k pages, loading them on demand, but with the
  495. reduced software overhead and larger internal fragmentation.
  496. For the 32 bit kernel, a large page option will not be offered
  497. unless it is supported by the configured processor.
  498. If unsure, choose 4K_PAGES.
  499. config PPC_4K_PAGES
  500. bool "4k page size"
  501. select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
  502. config PPC_16K_PAGES
  503. bool "16k page size"
  504. depends on 44x || PPC_8xx
  505. config PPC_64K_PAGES
  506. bool "64k page size"
  507. depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
  508. select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
  509. config PPC_256K_PAGES
  510. bool "256k page size"
  511. depends on 44x && !STDBINUTILS
  512. help
  513. Make the page size 256k.
  514. As the ELF standard only requires alignment to support page
  515. sizes up to 64k, you will need to compile all of your user
  516. space applications with a non-standard binutils settings
  517. (see the STDBINUTILS description for details).
  518. Say N unless you know what you are doing.
  519. endchoice
  520. config FORCE_MAX_ZONEORDER
  521. int "Maximum zone order"
  522. range 8 9 if PPC64 && PPC_64K_PAGES
  523. default "9" if PPC64 && PPC_64K_PAGES
  524. range 13 13 if PPC64 && !PPC_64K_PAGES
  525. default "13" if PPC64 && !PPC_64K_PAGES
  526. range 9 64 if PPC32 && PPC_16K_PAGES
  527. default "9" if PPC32 && PPC_16K_PAGES
  528. range 7 64 if PPC32 && PPC_64K_PAGES
  529. default "7" if PPC32 && PPC_64K_PAGES
  530. range 5 64 if PPC32 && PPC_256K_PAGES
  531. default "5" if PPC32 && PPC_256K_PAGES
  532. range 11 64
  533. default "11"
  534. help
  535. The kernel memory allocator divides physically contiguous memory
  536. blocks into "zones", where each zone is a power of two number of
  537. pages. This option selects the largest power of two that the kernel
  538. keeps in the memory allocator. If you need to allocate very large
  539. blocks of physically contiguous memory, then you may need to
  540. increase this value.
  541. This config option is actually maximum order plus one. For example,
  542. a value of 11 means that the largest free memory block is 2^10 pages.
  543. The page size is not necessarily 4KB. For example, on 64-bit
  544. systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
  545. this in mind when choosing a value for this option.
  546. config PPC_SUBPAGE_PROT
  547. bool "Support setting protections for 4k subpages"
  548. depends on PPC_STD_MMU_64 && PPC_64K_PAGES
  549. help
  550. This option adds support for a system call to allow user programs
  551. to set access permissions (read/write, readonly, or no access)
  552. on the 4k subpages of each 64k page.
  553. config PPC_COPRO_BASE
  554. bool
  555. default n
  556. config SCHED_SMT
  557. bool "SMT (Hyperthreading) scheduler support"
  558. depends on PPC64 && SMP
  559. help
  560. SMT scheduler support improves the CPU scheduler's decision making
  561. when dealing with POWER5 cpus at a cost of slightly increased
  562. overhead in some places. If unsure say N here.
  563. config PPC_DENORMALISATION
  564. bool "PowerPC denormalisation exception handling"
  565. depends on PPC_BOOK3S_64
  566. default "y" if PPC_POWERNV
  567. ---help---
  568. Add support for handling denormalisation of single precision
  569. values. Useful for bare metal only. If unsure say Y here.
  570. config CMDLINE_BOOL
  571. bool "Default bootloader kernel arguments"
  572. config CMDLINE
  573. string "Initial kernel command string"
  574. depends on CMDLINE_BOOL
  575. default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
  576. help
  577. On some platforms, there is currently no way for the boot loader to
  578. pass arguments to the kernel. For these platforms, you can supply
  579. some command-line options at build time by entering them here. In
  580. most cases you will need to specify the root device here.
  581. config CMDLINE_FORCE
  582. bool "Always use the default kernel command string"
  583. depends on CMDLINE_BOOL
  584. help
  585. Always use the default kernel command string, even if the boot
  586. loader passes other arguments to the kernel.
  587. This is useful if you cannot or don't want to change the
  588. command-line options your boot loader passes to the kernel.
  589. config EXTRA_TARGETS
  590. string "Additional default image types"
  591. help
  592. List additional targets to be built by the bootwrapper here (separated
  593. by spaces). This is useful for targets that depend of device tree
  594. files in the .dts directory.
  595. Targets in this list will be build as part of the default build
  596. target, or when the user does a 'make zImage' or a
  597. 'make zImage.initrd'.
  598. If unsure, leave blank
  599. config ARCH_WANTS_FREEZER_CONTROL
  600. def_bool y
  601. depends on ADB_PMU
  602. source kernel/power/Kconfig
  603. config SECCOMP
  604. bool "Enable seccomp to safely compute untrusted bytecode"
  605. depends on PROC_FS
  606. default y
  607. help
  608. This kernel feature is useful for number crunching applications
  609. that may need to compute untrusted bytecode during their
  610. execution. By using pipes or other transports made available to
  611. the process as file descriptors supporting the read/write
  612. syscalls, it's possible to isolate those applications in
  613. their own address space using seccomp. Once seccomp is
  614. enabled via /proc/<pid>/seccomp, it cannot be disabled
  615. and the task is only allowed to execute a few safe syscalls
  616. defined by each seccomp mode.
  617. If unsure, say Y. Only embedded should say N here.
  618. endmenu
  619. config ISA_DMA_API
  620. bool
  621. default PCI
  622. menu "Bus options"
  623. config ISA
  624. bool "Support for ISA-bus hardware"
  625. depends on PPC_CHRP
  626. select PPC_I8259
  627. help
  628. Find out whether you have ISA slots on your motherboard. ISA is the
  629. name of a bus system, i.e. the way the CPU talks to the other stuff
  630. inside your box. If you have an Apple machine, say N here; if you
  631. have an IBM RS/6000 or pSeries machine, say Y. If you have an
  632. embedded board, consult your board documentation.
  633. config ZONE_DMA
  634. bool
  635. default y
  636. config NEED_DMA_MAP_STATE
  637. def_bool (PPC64 || NOT_COHERENT_CACHE)
  638. config NEED_SG_DMA_LENGTH
  639. def_bool y
  640. config GENERIC_ISA_DMA
  641. bool
  642. depends on ISA_DMA_API
  643. default y
  644. config PPC_INDIRECT_PCI
  645. bool
  646. depends on PCI
  647. default y if 40x || 44x
  648. default n
  649. config EISA
  650. bool
  651. config SBUS
  652. bool
  653. config FSL_SOC
  654. bool
  655. config FSL_PCI
  656. bool
  657. select PPC_INDIRECT_PCI
  658. select PCI_QUIRKS
  659. config FSL_PMC
  660. bool
  661. default y
  662. depends on SUSPEND && (PPC_85xx || PPC_86xx)
  663. help
  664. Freescale MPC85xx/MPC86xx power management controller support
  665. (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
  666. config PPC4xx_CPM
  667. bool
  668. default y
  669. depends on SUSPEND && (44x || 40x)
  670. help
  671. PPC4xx Clock Power Management (CPM) support (suspend/resume).
  672. It also enables support for two different idle states (idle-wait
  673. and idle-doze).
  674. config 4xx_SOC
  675. bool
  676. config FSL_LBC
  677. bool "Freescale Local Bus support"
  678. help
  679. Enables reporting of errors from the Freescale local bus
  680. controller. Also contains some common code used by
  681. drivers for specific local bus peripherals.
  682. config FSL_GTM
  683. bool
  684. depends on PPC_83xx || QUICC_ENGINE || CPM2
  685. help
  686. Freescale General-purpose Timers support
  687. # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
  688. config MCA
  689. bool
  690. # Platforms that what PCI turned unconditionally just do select PCI
  691. # in their config node. Platforms that want to choose at config
  692. # time should select PPC_PCI_CHOICE
  693. config PPC_PCI_CHOICE
  694. bool
  695. config PCI
  696. bool "PCI support" if PPC_PCI_CHOICE
  697. default y if !40x && !CPM2 && !8xx && !PPC_83xx \
  698. && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
  699. default PCI_QSPAN if !4xx && !CPM2 && 8xx
  700. select GENERIC_PCI_IOMAP
  701. help
  702. Find out whether your system includes a PCI bus. PCI is the name of
  703. a bus system, i.e. the way the CPU talks to the other stuff inside
  704. your box. If you say Y here, the kernel will include drivers and
  705. infrastructure code to support PCI bus devices.
  706. config PCI_DOMAINS
  707. def_bool PCI
  708. config PCI_SYSCALL
  709. def_bool PCI
  710. config PCI_QSPAN
  711. bool "QSpan PCI"
  712. depends on !4xx && !CPM2 && 8xx
  713. select PPC_I8259
  714. help
  715. Say Y here if you have a system based on a Motorola 8xx-series
  716. embedded processor with a QSPAN PCI interface, otherwise say N.
  717. config PCI_8260
  718. bool
  719. depends on PCI && 8260
  720. select PPC_INDIRECT_PCI
  721. default y
  722. source "drivers/pci/Kconfig"
  723. source "drivers/pcmcia/Kconfig"
  724. config HAS_RAPIDIO
  725. bool
  726. default n
  727. config RAPIDIO
  728. tristate "RapidIO support"
  729. depends on HAS_RAPIDIO || PCI
  730. help
  731. If you say Y here, the kernel will include drivers and
  732. infrastructure code to support RapidIO interconnect devices.
  733. config FSL_RIO
  734. bool "Freescale Embedded SRIO Controller support"
  735. depends on RAPIDIO = y && HAS_RAPIDIO
  736. default "n"
  737. ---help---
  738. Include support for RapidIO controller on Freescale embedded
  739. processors (MPC8548, MPC8641, etc).
  740. source "drivers/rapidio/Kconfig"
  741. endmenu
  742. config NONSTATIC_KERNEL
  743. bool
  744. default n
  745. menu "Advanced setup"
  746. depends on PPC32
  747. config ADVANCED_OPTIONS
  748. bool "Prompt for advanced kernel configuration options"
  749. help
  750. This option will enable prompting for a variety of advanced kernel
  751. configuration options. These options can cause the kernel to not
  752. work if they are set incorrectly, but can be used to optimize certain
  753. aspects of kernel memory management.
  754. Unless you know what you are doing, say N here.
  755. comment "Default settings for advanced configuration options are used"
  756. depends on !ADVANCED_OPTIONS
  757. config LOWMEM_SIZE_BOOL
  758. bool "Set maximum low memory"
  759. depends on ADVANCED_OPTIONS
  760. help
  761. This option allows you to set the maximum amount of memory which
  762. will be used as "low memory", that is, memory which the kernel can
  763. access directly, without having to set up a kernel virtual mapping.
  764. This can be useful in optimizing the layout of kernel virtual
  765. memory.
  766. Say N here unless you know what you are doing.
  767. config LOWMEM_SIZE
  768. hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
  769. default "0x30000000"
  770. config LOWMEM_CAM_NUM_BOOL
  771. bool "Set number of CAMs to use to map low memory"
  772. depends on ADVANCED_OPTIONS && FSL_BOOKE
  773. help
  774. This option allows you to set the maximum number of CAM slots that
  775. will be used to map low memory. There are a limited number of slots
  776. available and even more limited number that will fit in the L1 MMU.
  777. However, using more entries will allow mapping more low memory. This
  778. can be useful in optimizing the layout of kernel virtual memory.
  779. Say N here unless you know what you are doing.
  780. config LOWMEM_CAM_NUM
  781. depends on FSL_BOOKE
  782. int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
  783. default 3
  784. config DYNAMIC_MEMSTART
  785. bool "Enable page aligned dynamic load address for kernel"
  786. depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
  787. select NONSTATIC_KERNEL
  788. help
  789. This option enables the kernel to be loaded at any page aligned
  790. physical address. The kernel creates a mapping from KERNELBASE to
  791. the address where the kernel is loaded. The page size here implies
  792. the TLB page size of the mapping for kernel on the particular platform.
  793. Please refer to the init code for finding the TLB page size.
  794. DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
  795. kernel image, where the only restriction is the page aligned kernel
  796. load address. When this option is enabled, the compile time physical
  797. address CONFIG_PHYSICAL_START is ignored.
  798. This option is overridden by CONFIG_RELOCATABLE
  799. config PAGE_OFFSET_BOOL
  800. bool "Set custom page offset address"
  801. depends on ADVANCED_OPTIONS
  802. help
  803. This option allows you to set the kernel virtual address at which
  804. the kernel will map low memory. This can be useful in optimizing
  805. the virtual memory layout of the system.
  806. Say N here unless you know what you are doing.
  807. config PAGE_OFFSET
  808. hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
  809. default "0xc0000000"
  810. config KERNEL_START_BOOL
  811. bool "Set custom kernel base address"
  812. depends on ADVANCED_OPTIONS
  813. help
  814. This option allows you to set the kernel virtual address at which
  815. the kernel will be loaded. Normally this should match PAGE_OFFSET
  816. however there are times (like kdump) that one might not want them
  817. to be the same.
  818. Say N here unless you know what you are doing.
  819. config KERNEL_START
  820. hex "Virtual address of kernel base" if KERNEL_START_BOOL
  821. default PAGE_OFFSET if PAGE_OFFSET_BOOL
  822. default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
  823. default "0xc0000000"
  824. config PHYSICAL_START_BOOL
  825. bool "Set physical address where the kernel is loaded"
  826. depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
  827. help
  828. This gives the physical address where the kernel is loaded.
  829. Say N here unless you know what you are doing.
  830. config PHYSICAL_START
  831. hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
  832. default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
  833. default "0x00000000"
  834. config PHYSICAL_ALIGN
  835. hex
  836. default "0x04000000" if FSL_BOOKE
  837. help
  838. This value puts the alignment restrictions on physical address
  839. where kernel is loaded and run from. Kernel is compiled for an
  840. address which meets above alignment restriction.
  841. config TASK_SIZE_BOOL
  842. bool "Set custom user task size"
  843. depends on ADVANCED_OPTIONS
  844. help
  845. This option allows you to set the amount of virtual address space
  846. allocated to user tasks. This can be useful in optimizing the
  847. virtual memory layout of the system.
  848. Say N here unless you know what you are doing.
  849. config TASK_SIZE
  850. hex "Size of user task space" if TASK_SIZE_BOOL
  851. default "0x80000000" if PPC_8xx
  852. default "0xc0000000"
  853. config CONSISTENT_SIZE_BOOL
  854. bool "Set custom consistent memory pool size"
  855. depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
  856. help
  857. This option allows you to set the size of the
  858. consistent memory pool. This pool of virtual memory
  859. is used to make consistent memory allocations.
  860. config CONSISTENT_SIZE
  861. hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
  862. default "0x00200000" if NOT_COHERENT_CACHE
  863. config PIN_TLB
  864. bool "Pinned Kernel TLBs (860 ONLY)"
  865. depends on ADVANCED_OPTIONS && 8xx
  866. config PIN_TLB_IMMR
  867. bool "Pinned TLB for IMMR"
  868. depends on PIN_TLB
  869. default y
  870. endmenu
  871. if PPC64
  872. # This value must have zeroes in the bottom 60 bits otherwise lots will break
  873. config PAGE_OFFSET
  874. hex
  875. default "0xc000000000000000"
  876. config KERNEL_START
  877. hex
  878. default "0xc000000000000000"
  879. config PHYSICAL_START
  880. hex
  881. default "0x00000000"
  882. endif
  883. config ARCH_RANDOM
  884. def_bool n
  885. source "net/Kconfig"
  886. source "drivers/Kconfig"
  887. source "fs/Kconfig"
  888. source "lib/Kconfig"
  889. source "arch/powerpc/Kconfig.debug"
  890. source "security/Kconfig"
  891. source "crypto/Kconfig"
  892. config PPC_LIB_RHEAP
  893. bool
  894. source "arch/powerpc/kvm/Kconfig"
  895. source "kernel/livepatch/Kconfig"