1 source "arch/powerpc/platforms/Kconfig.cputype"
20 config ARCH_PHYS_ADDR_T_64BIT
21 def_bool PPC64 || PHYS_64BIT
23 config ARCH_DMA_ADDR_T_64BIT
24 def_bool ARCH_PHYS_ADDR_T_64BIT
30 config GENERIC_CMOS_UPDATE
33 config GENERIC_TIME_VSYSCALL
36 config GENERIC_CLOCKEVENTS
39 config HAVE_SETUP_PER_CPU_AREA
42 config NEED_PER_CPU_EMBED_FIRST_CHUNK
46 int "Number of virtual interrupt numbers"
50 This defines the number of virtual interrupt numbers the kernel
51 can manage. Virtual interrupt numbers are what you see in
52 /proc/interrupts. If you configure your system to have too few,
53 drivers will fail to load or worse - handle with care.
55 config STACKTRACE_SUPPORT
59 config HAVE_LATENCYTOP_SUPPORT
62 config TRACE_IRQFLAGS_SUPPORT
66 config LOCKDEP_SUPPORT
70 config RWSEM_GENERIC_SPINLOCK
73 config RWSEM_XCHGADD_ALGORITHM
77 config GENERIC_LOCKBREAK
80 depends on SMP && PREEMPT
82 config ARCH_HAS_ILOG2_U32
86 config ARCH_HAS_ILOG2_U64
90 config GENERIC_HWEIGHT
94 config GENERIC_FIND_NEXT_BIT
101 Generic GPIO API support
103 config ARCH_NO_VIRT_TO_BUS
110 select OF_EARLY_FLATTREE
111 select HAVE_FTRACE_MCOUNT_RECORD
112 select HAVE_DYNAMIC_FTRACE
113 select HAVE_FUNCTION_TRACER
114 select HAVE_FUNCTION_GRAPH_TRACER
115 select ARCH_WANT_OPTIONAL_GPIOLIB
117 select HAVE_IOREMAP_PROT
118 select HAVE_EFFICIENT_UNALIGNED_ACCESS
120 select HAVE_ARCH_KGDB
121 select HAVE_KRETPROBES
122 select HAVE_ARCH_TRACEHOOK
124 select HAVE_DMA_ATTRS
125 select HAVE_DMA_API_DEBUG
126 select USE_GENERIC_SMP_HELPERS if SMP
128 select HAVE_SYSCALL_WRAPPERS if PPC64
129 select GENERIC_ATOMIC64 if PPC32
131 select HAVE_PERF_EVENTS
132 select HAVE_REGS_AND_STACK_ACCESS_API
133 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
134 select HAVE_GENERIC_HARDIRQS
135 select HAVE_SPARSE_IRQ
137 select GENERIC_HARDIRQS_NO_DEPRECATED
146 select COMPAT_BINFMT_ELF
148 config SYSVIPC_COMPAT
150 depends on COMPAT && SYSVIPC
153 # All PPC32s use generic nvram driver through ppc_md
158 config SCHED_OMIT_FRAME_POINTER
162 config ARCH_MAY_HAVE_PC_FDC
164 default !PPC_PSERIES || PCI
169 config PPC_UDBG_16550
173 config GENERIC_TBSYNC
175 default y if PPC32 && SMP
187 config SYS_SUPPORTS_APM_EMULATION
188 default y if PMAC_APM_EMU
191 config DEFAULT_UIMAGE
194 Used to allow a board to specify it wants a uImage built by default
200 config ARCH_HIBERNATION_POSSIBLE
204 config ARCH_SUSPEND_POSSIBLE
206 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
207 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
209 config PPC_DCR_NATIVE
219 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
222 config PPC_OF_PLATFORM_PCI
225 depends on PPC64 # not supported on 32 bits yet
228 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
231 config PPC_ADV_DEBUG_REGS
233 depends on 40x || BOOKE
236 config PPC_ADV_DEBUG_IACS
238 depends on PPC_ADV_DEBUG_REGS
242 config PPC_ADV_DEBUG_DACS
244 depends on PPC_ADV_DEBUG_REGS
247 config PPC_ADV_DEBUG_DVCS
249 depends on PPC_ADV_DEBUG_REGS
253 config PPC_ADV_DEBUG_DAC_RANGE
255 depends on PPC_ADV_DEBUG_REGS && 44x
258 source "init/Kconfig"
260 source "kernel/Kconfig.freezer"
262 source "arch/powerpc/sysdev/Kconfig"
263 source "arch/powerpc/platforms/Kconfig"
265 menu "Kernel options"
268 bool "High memory support"
271 source kernel/time/Kconfig
272 source kernel/Kconfig.hz
273 source kernel/Kconfig.preempt
274 source "fs/Kconfig.binfmt"
276 config HUGETLB_PAGE_SIZE_VARIABLE
278 depends on HUGETLB_PAGE
281 config MATH_EMULATION
282 bool "Math emulation"
283 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
285 Some PowerPC chips designed for embedded applications do not have
286 a floating-point unit and therefore do not implement the
287 floating-point instructions in the PowerPC instruction set. If you
288 say Y here, the kernel will include code to emulate a floating-point
289 unit, which will allow programs that use floating-point
292 config 8XX_MINIMAL_FPEMU
293 bool "Minimal math emulation for 8xx"
294 depends on 8xx && !MATH_EMULATION
296 Older arch/ppc kernels still emulated a few floating point
297 instructions such as load and store, even when full math
298 emulation is disabled. Say "Y" here if you want to preserve
301 It is recommended that you build a soft-float userspace instead.
307 bool "SWIOTLB support"
311 Support for IO bounce buffering for systems without an IOMMU.
312 This allows us to DMA to the full physical address space on
313 platforms where the size of a physical address is larger
314 than the bus address. Not all platforms support this.
317 bool "Support for enabling/disabling CPUs"
318 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
320 Say Y here to be able to disable and re-enable individual
321 CPUs at runtime on SMP machines.
323 Say N if you are unsure.
325 config ARCH_CPU_PROBE_RELEASE
327 depends on HOTPLUG_CPU
329 config ARCH_ENABLE_MEMORY_HOTPLUG
332 config ARCH_HAS_WALK_MEMORY
335 config ARCH_ENABLE_MEMORY_HOTREMOVE
339 bool "kexec system call (EXPERIMENTAL)"
340 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
342 kexec is a system call that implements the ability to shutdown your
343 current kernel, and to start another kernel. It is like a reboot
344 but it is independent of the system firmware. And like a reboot
345 you can start any kernel with it, not just Linux.
347 The name comes from the similarity to the exec system call.
349 It is an ongoing process to be certain the hardware in a machine
350 is properly shutdown, so do not be surprised if this code does not
351 initially work for you. It may help to enable device hotplugging
352 support. As of this writing the exact hardware interface is
353 strongly in flux, so no good recommendation can be made.
356 bool "Build a kdump crash kernel"
357 depends on PPC64 || 6xx || FSL_BOOKE
358 select RELOCATABLE if PPC64 || FSL_BOOKE
360 Build a kernel suitable for use as a kdump capture kernel.
361 The same kernel binary can be used as production kernel and dump
365 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
366 depends on PPC_PSERIES && EXPERIMENTAL
368 Hypervisor-assisted dump is meant to be a kdump replacement
369 offering robustness and speed not possible without system
370 hypervisor assistance.
375 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
376 default y if PPC_PREP
379 bool "Distribute interrupts on all CPUs by default"
380 depends on SMP && !MV64360
382 This option gives the kernel permission to distribute IRQs across
383 multiple CPUs. Saying N here will route all IRQs to the first
384 CPU. Generally saying Y is safe, although some problems have been
385 reported with SMP Power Macintoshes with this option enabled.
390 default y if SMP && PPC_PSERIES
396 depends on NEED_MULTIPLE_NODES
398 config MAX_ACTIVE_REGIONS
400 default "256" if PPC64
403 config ARCH_SELECT_MEMORY_MODEL
407 config ARCH_FLATMEM_ENABLE
409 depends on (PPC64 && !NUMA) || PPC32
411 config ARCH_SPARSEMEM_ENABLE
414 select SPARSEMEM_VMEMMAP_ENABLE
416 config ARCH_SPARSEMEM_DEFAULT
418 depends on (SMP && PPC_PSERIES) || PPC_PS3
420 config ARCH_POPULATES_NODE_MAP
423 config SYS_SUPPORTS_HUGETLBFS
425 depends on PPC_BOOK3S_64
429 config ARCH_MEMORY_PROBE
431 depends on MEMORY_HOTPLUG
433 # Some NUMA nodes have memory ranges that span
434 # other nodes. Even though a pfn is valid and
435 # between a node's start and end pfns, it may not
436 # reside on that node. See memmap_init_zone()
438 config NODES_SPAN_OTHER_NODES
440 depends on NEED_MULTIPLE_NODES
442 config PPC_HAS_HASH_64K
448 bool "Using standard binutils settings"
452 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
453 Note, that kernel will be able to run only those applications,
454 which had been compiled using binutils later than 2.17.50.0.3 with
455 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
456 the older binutils, you can patch them with a trivial patch, which
457 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
463 Select the kernel logical page size. Increasing the page size
464 will reduce software overhead at each page boundary, allow
465 hardware prefetch mechanisms to be more effective, and allow
466 larger dma transfers increasing IO efficiency and reducing
467 overhead. However the utilization of memory will increase.
468 For example, each cached file will using a multiple of the
469 page size to hold its contents and the difference between the
470 end of file and the end of page is wasted.
472 Some dedicated systems, such as software raid serving with
473 accelerated calculations, have shown significant increases.
475 If you configure a 64 bit kernel for 64k pages but the
476 processor does not support them, then the kernel will simulate
477 them with 4k pages, loading them on demand, but with the
478 reduced software overhead and larger internal fragmentation.
479 For the 32 bit kernel, a large page option will not be offered
480 unless it is supported by the configured processor.
482 If unsure, choose 4K_PAGES.
488 bool "16k page size" if 44x
491 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
492 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
494 config PPC_256K_PAGES
495 bool "256k page size" if 44x
496 depends on !STDBINUTILS
498 Make the page size 256k.
500 As the ELF standard only requires alignment to support page
501 sizes up to 64k, you will need to compile all of your user
502 space applications with a non-standard binutils settings
503 (see the STDBINUTILS description for details).
505 Say N unless you know what you are doing.
509 config FORCE_MAX_ZONEORDER
510 int "Maximum zone order"
511 range 9 64 if PPC64 && PPC_64K_PAGES
512 default "9" if PPC64 && PPC_64K_PAGES
513 range 13 64 if PPC64 && !PPC_64K_PAGES
514 default "13" if PPC64 && !PPC_64K_PAGES
515 range 9 64 if PPC32 && PPC_16K_PAGES
516 default "9" if PPC32 && PPC_16K_PAGES
517 range 7 64 if PPC32 && PPC_64K_PAGES
518 default "7" if PPC32 && PPC_64K_PAGES
519 range 5 64 if PPC32 && PPC_256K_PAGES
520 default "5" if PPC32 && PPC_256K_PAGES
524 The kernel memory allocator divides physically contiguous memory
525 blocks into "zones", where each zone is a power of two number of
526 pages. This option selects the largest power of two that the kernel
527 keeps in the memory allocator. If you need to allocate very large
528 blocks of physically contiguous memory, then you may need to
531 This config option is actually maximum order plus one. For example,
532 a value of 11 means that the largest free memory block is 2^10 pages.
534 The page size is not necessarily 4KB. For example, on 64-bit
535 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
536 this in mind when choosing a value for this option.
538 config PPC_SUBPAGE_PROT
539 bool "Support setting protections for 4k subpages"
540 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
542 This option adds support for a system call to allow user programs
543 to set access permissions (read/write, readonly, or no access)
544 on the 4k subpages of each 64k page.
547 bool "SMT (Hyperthreading) scheduler support"
548 depends on PPC64 && SMP
550 SMT scheduler support improves the CPU scheduler's decision making
551 when dealing with POWER5 cpus at a cost of slightly increased
552 overhead in some places. If unsure say N here.
555 bool "Default bootloader kernel arguments"
558 string "Initial kernel command string"
559 depends on CMDLINE_BOOL
560 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
562 On some platforms, there is currently no way for the boot loader to
563 pass arguments to the kernel. For these platforms, you can supply
564 some command-line options at build time by entering them here. In
565 most cases you will need to specify the root device here.
568 string "Additional default image types"
570 List additional targets to be built by the bootwrapper here (separated
571 by spaces). This is useful for targets that depend of device tree
572 files in the .dts directory.
574 Targets in this list will be build as part of the default build
575 target, or when the user does a 'make zImage' or a
576 'make zImage.initrd'.
578 If unsure, leave blank
580 config ARCH_WANTS_FREEZER_CONTROL
584 source kernel/power/Kconfig
587 bool "Enable seccomp to safely compute untrusted bytecode"
591 This kernel feature is useful for number crunching applications
592 that may need to compute untrusted bytecode during their
593 execution. By using pipes or other transports made available to
594 the process as file descriptors supporting the read/write
595 syscalls, it's possible to isolate those applications in
596 their own address space using seccomp. Once seccomp is
597 enabled via /proc/<pid>/seccomp, it cannot be disabled
598 and the task is only allowed to execute a few safe syscalls
599 defined by each seccomp mode.
601 If unsure, say Y. Only embedded should say N here.
607 default !PPC_ISERIES || PCI
612 bool "Support for ISA-bus hardware"
613 depends on PPC_PREP || PPC_CHRP
616 Find out whether you have ISA slots on your motherboard. ISA is the
617 name of a bus system, i.e. the way the CPU talks to the other stuff
618 inside your box. If you have an Apple machine, say N here; if you
619 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
620 you have an embedded board, consult your board documentation.
626 config NEED_DMA_MAP_STATE
627 def_bool (PPC64 || NOT_COHERENT_CACHE)
629 config NEED_SG_DMA_LENGTH
632 config GENERIC_ISA_DMA
634 depends on ISA_DMA_API
637 config PPC_INDIRECT_PCI
640 default y if 40x || 44x
654 select PPC_INDIRECT_PCI
660 depends on SUSPEND && (PPC_85xx || PPC_86xx)
662 Freescale MPC85xx/MPC86xx power management controller support
663 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
668 depends on SUSPEND && (44x || 40x)
670 PPC4xx Clock Power Management (CPM) support (suspend/resume).
671 It also enables support for two different idle states (idle-wait
678 bool "Freescale Local Bus support"
681 Enables reporting of errors from the Freescale local bus
682 controller. Also contains some common code used by
683 drivers for specific local bus peripherals.
687 depends on PPC_83xx || QUICC_ENGINE || CPM2
689 Freescale General-purpose Timers support
691 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
695 # Platforms that what PCI turned unconditionally just do select PCI
696 # in their config node. Platforms that want to choose at config
697 # time should select PPC_PCI_CHOICE
698 config PPC_PCI_CHOICE
702 bool "PCI support" if PPC_PCI_CHOICE
703 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
704 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
705 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
706 default PCI_QSPAN if !4xx && !CPM2 && 8xx
707 select ARCH_SUPPORTS_MSI
709 Find out whether your system includes a PCI bus. PCI is the name of
710 a bus system, i.e. the way the CPU talks to the other stuff inside
711 your box. If you say Y here, the kernel will include drivers and
712 infrastructure code to support PCI bus devices.
722 depends on !4xx && !CPM2 && 8xx
725 Say Y here if you have a system based on a Motorola 8xx-series
726 embedded processor with a QSPAN PCI interface, otherwise say N.
730 depends on PCI && 8260
731 select PPC_INDIRECT_PCI
735 bool "Enable workaround for MPC826x erratum PCI 9"
736 depends on PCI_8260 && !8272
740 prompt "IDMA channel for PCI 9 workaround"
743 config 8260_PCI9_IDMA1
746 config 8260_PCI9_IDMA2
749 config 8260_PCI9_IDMA3
752 config 8260_PCI9_IDMA4
757 source "drivers/pci/pcie/Kconfig"
759 source "drivers/pci/Kconfig"
761 source "drivers/pcmcia/Kconfig"
763 source "drivers/pci/hotplug/Kconfig"
770 bool "RapidIO support"
771 depends on HAS_RAPIDIO
773 If you say Y here, the kernel will include drivers and
774 infrastructure code to support RapidIO interconnect devices.
776 source "drivers/rapidio/Kconfig"
780 menu "Advanced setup"
783 config ADVANCED_OPTIONS
784 bool "Prompt for advanced kernel configuration options"
786 This option will enable prompting for a variety of advanced kernel
787 configuration options. These options can cause the kernel to not
788 work if they are set incorrectly, but can be used to optimize certain
789 aspects of kernel memory management.
791 Unless you know what you are doing, say N here.
793 comment "Default settings for advanced configuration options are used"
794 depends on !ADVANCED_OPTIONS
796 config LOWMEM_SIZE_BOOL
797 bool "Set maximum low memory"
798 depends on ADVANCED_OPTIONS
800 This option allows you to set the maximum amount of memory which
801 will be used as "low memory", that is, memory which the kernel can
802 access directly, without having to set up a kernel virtual mapping.
803 This can be useful in optimizing the layout of kernel virtual
806 Say N here unless you know what you are doing.
809 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
812 config LOWMEM_CAM_NUM_BOOL
813 bool "Set number of CAMs to use to map low memory"
814 depends on ADVANCED_OPTIONS && FSL_BOOKE
816 This option allows you to set the maximum number of CAM slots that
817 will be used to map low memory. There are a limited number of slots
818 available and even more limited number that will fit in the L1 MMU.
819 However, using more entries will allow mapping more low memory. This
820 can be useful in optimizing the layout of kernel virtual memory.
822 Say N here unless you know what you are doing.
824 config LOWMEM_CAM_NUM
826 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
830 bool "Build a relocatable kernel (EXPERIMENTAL)"
831 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
833 This builds a kernel image that is capable of running at the
834 location the kernel is loaded at (some alignment restrictions may
837 One use is for the kexec on panic case where the recovery kernel
838 must live at a different physical address than the primary
841 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
842 it has been loaded at and the compile time physical addresses
843 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
844 setting can still be useful to bootwrappers that need to know the
845 load location of the kernel (eg. u-boot/mkimage).
847 config PAGE_OFFSET_BOOL
848 bool "Set custom page offset address"
849 depends on ADVANCED_OPTIONS
851 This option allows you to set the kernel virtual address at which
852 the kernel will map low memory. This can be useful in optimizing
853 the virtual memory layout of the system.
855 Say N here unless you know what you are doing.
858 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
861 config KERNEL_START_BOOL
862 bool "Set custom kernel base address"
863 depends on ADVANCED_OPTIONS
865 This option allows you to set the kernel virtual address at which
866 the kernel will be loaded. Normally this should match PAGE_OFFSET
867 however there are times (like kdump) that one might not want them
870 Say N here unless you know what you are doing.
873 hex "Virtual address of kernel base" if KERNEL_START_BOOL
874 default PAGE_OFFSET if PAGE_OFFSET_BOOL
875 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
878 config PHYSICAL_START_BOOL
879 bool "Set physical address where the kernel is loaded"
880 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
882 This gives the physical address where the kernel is loaded.
884 Say N here unless you know what you are doing.
886 config PHYSICAL_START
887 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
888 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
891 config PHYSICAL_ALIGN
893 default "0x04000000" if FSL_BOOKE
895 This value puts the alignment restrictions on physical address
896 where kernel is loaded and run from. Kernel is compiled for an
897 address which meets above alignment restriction.
899 config TASK_SIZE_BOOL
900 bool "Set custom user task size"
901 depends on ADVANCED_OPTIONS
903 This option allows you to set the amount of virtual address space
904 allocated to user tasks. This can be useful in optimizing the
905 virtual memory layout of the system.
907 Say N here unless you know what you are doing.
910 hex "Size of user task space" if TASK_SIZE_BOOL
911 default "0x80000000" if PPC_PREP || PPC_8xx
914 config CONSISTENT_SIZE_BOOL
915 bool "Set custom consistent memory pool size"
916 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
918 This option allows you to set the size of the
919 consistent memory pool. This pool of virtual memory
920 is used to make consistent memory allocations.
922 config CONSISTENT_SIZE
923 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
924 default "0x00200000" if NOT_COHERENT_CACHE
927 bool "Pinned Kernel TLBs (860 ONLY)"
928 depends on ADVANCED_OPTIONS && 8xx
933 bool "Build a relocatable kernel"
935 This builds a kernel image that is capable of running anywhere
936 in the RMA (real memory area) at any 16k-aligned base address.
937 The kernel is linked as a position-independent executable (PIE)
938 and contains dynamic relocations which are processed early
939 in the bootup process.
941 One use is for the kexec on panic case where the recovery kernel
942 must live at a different physical address than the primary
947 default "0xc000000000000000"
950 default "0xc000000000000000"
951 config PHYSICAL_START
958 source "drivers/Kconfig"
962 source "arch/powerpc/sysdev/qe_lib/Kconfig"
966 source "arch/powerpc/Kconfig.debug"
968 source "security/Kconfig"
972 depends on COMPAT && KEYS
975 source "crypto/Kconfig"
985 source "arch/powerpc/kvm/Kconfig"