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
145 select COMPAT_BINFMT_ELF
147 config SYSVIPC_COMPAT
149 depends on COMPAT && SYSVIPC
152 # All PPC32s use generic nvram driver through ppc_md
157 config SCHED_OMIT_FRAME_POINTER
161 config ARCH_MAY_HAVE_PC_FDC
163 default !PPC_PSERIES || PCI
168 config PPC_UDBG_16550
172 config GENERIC_TBSYNC
174 default y if PPC32 && SMP
186 config SYS_SUPPORTS_APM_EMULATION
187 default y if PMAC_APM_EMU
190 config DEFAULT_UIMAGE
193 Used to allow a board to specify it wants a uImage built by default
199 config ARCH_HIBERNATION_POSSIBLE
203 config ARCH_SUSPEND_POSSIBLE
205 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
206 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
208 config PPC_DCR_NATIVE
218 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
221 config PPC_OF_PLATFORM_PCI
224 depends on PPC64 # not supported on 32 bits yet
227 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
230 config PPC_ADV_DEBUG_REGS
232 depends on 40x || BOOKE
235 config PPC_ADV_DEBUG_IACS
237 depends on PPC_ADV_DEBUG_REGS
241 config PPC_ADV_DEBUG_DACS
243 depends on PPC_ADV_DEBUG_REGS
246 config PPC_ADV_DEBUG_DVCS
248 depends on PPC_ADV_DEBUG_REGS
252 config PPC_ADV_DEBUG_DAC_RANGE
254 depends on PPC_ADV_DEBUG_REGS && 44x
257 source "init/Kconfig"
259 source "kernel/Kconfig.freezer"
261 source "arch/powerpc/sysdev/Kconfig"
262 source "arch/powerpc/platforms/Kconfig"
264 menu "Kernel options"
267 bool "High memory support"
270 source kernel/time/Kconfig
271 source kernel/Kconfig.hz
272 source kernel/Kconfig.preempt
273 source "fs/Kconfig.binfmt"
275 config HUGETLB_PAGE_SIZE_VARIABLE
277 depends on HUGETLB_PAGE
280 config MATH_EMULATION
281 bool "Math emulation"
282 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
284 Some PowerPC chips designed for embedded applications do not have
285 a floating-point unit and therefore do not implement the
286 floating-point instructions in the PowerPC instruction set. If you
287 say Y here, the kernel will include code to emulate a floating-point
288 unit, which will allow programs that use floating-point
291 config 8XX_MINIMAL_FPEMU
292 bool "Minimal math emulation for 8xx"
293 depends on 8xx && !MATH_EMULATION
295 Older arch/ppc kernels still emulated a few floating point
296 instructions such as load and store, even when full math
297 emulation is disabled. Say "Y" here if you want to preserve
300 It is recommended that you build a soft-float userspace instead.
306 bool "SWIOTLB support"
310 Support for IO bounce buffering for systems without an IOMMU.
311 This allows us to DMA to the full physical address space on
312 platforms where the size of a physical address is larger
313 than the bus address. Not all platforms support this.
316 bool "Support for enabling/disabling CPUs"
317 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
319 Say Y here to be able to disable and re-enable individual
320 CPUs at runtime on SMP machines.
322 Say N if you are unsure.
324 config ARCH_CPU_PROBE_RELEASE
326 depends on HOTPLUG_CPU
328 config ARCH_ENABLE_MEMORY_HOTPLUG
331 config ARCH_HAS_WALK_MEMORY
334 config ARCH_ENABLE_MEMORY_HOTREMOVE
338 bool "kexec system call (EXPERIMENTAL)"
339 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
341 kexec is a system call that implements the ability to shutdown your
342 current kernel, and to start another kernel. It is like a reboot
343 but it is independent of the system firmware. And like a reboot
344 you can start any kernel with it, not just Linux.
346 The name comes from the similarity to the exec system call.
348 It is an ongoing process to be certain the hardware in a machine
349 is properly shutdown, so do not be surprised if this code does not
350 initially work for you. It may help to enable device hotplugging
351 support. As of this writing the exact hardware interface is
352 strongly in flux, so no good recommendation can be made.
355 bool "Build a kdump crash kernel"
356 depends on PPC64 || 6xx || FSL_BOOKE
357 select RELOCATABLE if PPC64 || FSL_BOOKE
359 Build a kernel suitable for use as a kdump capture kernel.
360 The same kernel binary can be used as production kernel and dump
364 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
365 depends on PPC_PSERIES && EXPERIMENTAL
367 Hypervisor-assisted dump is meant to be a kdump replacement
368 offering robustness and speed not possible without system
369 hypervisor assistance.
374 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
375 default y if PPC_PREP
378 bool "Distribute interrupts on all CPUs by default"
379 depends on SMP && !MV64360
381 This option gives the kernel permission to distribute IRQs across
382 multiple CPUs. Saying N here will route all IRQs to the first
383 CPU. Generally saying Y is safe, although some problems have been
384 reported with SMP Power Macintoshes with this option enabled.
389 default y if SMP && PPC_PSERIES
395 depends on NEED_MULTIPLE_NODES
397 config MAX_ACTIVE_REGIONS
399 default "256" if PPC64
402 config ARCH_SELECT_MEMORY_MODEL
406 config ARCH_FLATMEM_ENABLE
408 depends on (PPC64 && !NUMA) || PPC32
410 config ARCH_SPARSEMEM_ENABLE
413 select SPARSEMEM_VMEMMAP_ENABLE
415 config ARCH_SPARSEMEM_DEFAULT
417 depends on (SMP && PPC_PSERIES) || PPC_PS3
419 config ARCH_POPULATES_NODE_MAP
422 config SYS_SUPPORTS_HUGETLBFS
424 depends on PPC_BOOK3S_64
428 config ARCH_MEMORY_PROBE
430 depends on MEMORY_HOTPLUG
432 # Some NUMA nodes have memory ranges that span
433 # other nodes. Even though a pfn is valid and
434 # between a node's start and end pfns, it may not
435 # reside on that node. See memmap_init_zone()
437 config NODES_SPAN_OTHER_NODES
439 depends on NEED_MULTIPLE_NODES
441 config PPC_HAS_HASH_64K
447 bool "Using standard binutils settings"
451 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
452 Note, that kernel will be able to run only those applications,
453 which had been compiled using binutils later than 2.17.50.0.3 with
454 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
455 the older binutils, you can patch them with a trivial patch, which
456 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
462 Select the kernel logical page size. Increasing the page size
463 will reduce software overhead at each page boundary, allow
464 hardware prefetch mechanisms to be more effective, and allow
465 larger dma transfers increasing IO efficiency and reducing
466 overhead. However the utilization of memory will increase.
467 For example, each cached file will using a multiple of the
468 page size to hold its contents and the difference between the
469 end of file and the end of page is wasted.
471 Some dedicated systems, such as software raid serving with
472 accelerated calculations, have shown significant increases.
474 If you configure a 64 bit kernel for 64k pages but the
475 processor does not support them, then the kernel will simulate
476 them with 4k pages, loading them on demand, but with the
477 reduced software overhead and larger internal fragmentation.
478 For the 32 bit kernel, a large page option will not be offered
479 unless it is supported by the configured processor.
481 If unsure, choose 4K_PAGES.
487 bool "16k page size" if 44x
490 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
491 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
493 config PPC_256K_PAGES
494 bool "256k page size" if 44x
495 depends on !STDBINUTILS
497 Make the page size 256k.
499 As the ELF standard only requires alignment to support page
500 sizes up to 64k, you will need to compile all of your user
501 space applications with a non-standard binutils settings
502 (see the STDBINUTILS description for details).
504 Say N unless you know what you are doing.
508 config FORCE_MAX_ZONEORDER
509 int "Maximum zone order"
510 range 9 64 if PPC64 && PPC_64K_PAGES
511 default "9" if PPC64 && PPC_64K_PAGES
512 range 13 64 if PPC64 && !PPC_64K_PAGES
513 default "13" if PPC64 && !PPC_64K_PAGES
514 range 9 64 if PPC32 && PPC_16K_PAGES
515 default "9" if PPC32 && PPC_16K_PAGES
516 range 7 64 if PPC32 && PPC_64K_PAGES
517 default "7" if PPC32 && PPC_64K_PAGES
518 range 5 64 if PPC32 && PPC_256K_PAGES
519 default "5" if PPC32 && PPC_256K_PAGES
523 The kernel memory allocator divides physically contiguous memory
524 blocks into "zones", where each zone is a power of two number of
525 pages. This option selects the largest power of two that the kernel
526 keeps in the memory allocator. If you need to allocate very large
527 blocks of physically contiguous memory, then you may need to
530 This config option is actually maximum order plus one. For example,
531 a value of 11 means that the largest free memory block is 2^10 pages.
533 The page size is not necessarily 4KB. For example, on 64-bit
534 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
535 this in mind when choosing a value for this option.
537 config PPC_SUBPAGE_PROT
538 bool "Support setting protections for 4k subpages"
539 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
541 This option adds support for a system call to allow user programs
542 to set access permissions (read/write, readonly, or no access)
543 on the 4k subpages of each 64k page.
546 bool "SMT (Hyperthreading) scheduler support"
547 depends on PPC64 && SMP
549 SMT scheduler support improves the CPU scheduler's decision making
550 when dealing with POWER5 cpus at a cost of slightly increased
551 overhead in some places. If unsure say N here.
554 bool "Default bootloader kernel arguments"
557 string "Initial kernel command string"
558 depends on CMDLINE_BOOL
559 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
561 On some platforms, there is currently no way for the boot loader to
562 pass arguments to the kernel. For these platforms, you can supply
563 some command-line options at build time by entering them here. In
564 most cases you will need to specify the root device here.
567 string "Additional default image types"
569 List additional targets to be built by the bootwrapper here (separated
570 by spaces). This is useful for targets that depend of device tree
571 files in the .dts directory.
573 Targets in this list will be build as part of the default build
574 target, or when the user does a 'make zImage' or a
575 'make zImage.initrd'.
577 If unsure, leave blank
579 config ARCH_WANTS_FREEZER_CONTROL
583 source kernel/power/Kconfig
586 bool "Enable seccomp to safely compute untrusted bytecode"
590 This kernel feature is useful for number crunching applications
591 that may need to compute untrusted bytecode during their
592 execution. By using pipes or other transports made available to
593 the process as file descriptors supporting the read/write
594 syscalls, it's possible to isolate those applications in
595 their own address space using seccomp. Once seccomp is
596 enabled via /proc/<pid>/seccomp, it cannot be disabled
597 and the task is only allowed to execute a few safe syscalls
598 defined by each seccomp mode.
600 If unsure, say Y. Only embedded should say N here.
606 default !PPC_ISERIES || PCI
611 bool "Support for ISA-bus hardware"
612 depends on PPC_PREP || PPC_CHRP
615 Find out whether you have ISA slots on your motherboard. ISA is the
616 name of a bus system, i.e. the way the CPU talks to the other stuff
617 inside your box. If you have an Apple machine, say N here; if you
618 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
619 you have an embedded board, consult your board documentation.
625 config NEED_DMA_MAP_STATE
626 def_bool (PPC64 || NOT_COHERENT_CACHE)
628 config NEED_SG_DMA_LENGTH
631 config GENERIC_ISA_DMA
633 depends on ISA_DMA_API
636 config PPC_INDIRECT_PCI
639 default y if 40x || 44x
653 select PPC_INDIRECT_PCI
659 depends on SUSPEND && (PPC_85xx || PPC_86xx)
661 Freescale MPC85xx/MPC86xx power management controller support
662 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
667 depends on SUSPEND && (44x || 40x)
669 PPC4xx Clock Power Management (CPM) support (suspend/resume).
670 It also enables support for two different idle states (idle-wait
677 bool "Freescale Local Bus support"
680 Enables reporting of errors from the Freescale local bus
681 controller. Also contains some common code used by
682 drivers for specific local bus peripherals.
686 depends on PPC_83xx || QUICC_ENGINE || CPM2
688 Freescale General-purpose Timers support
690 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
694 # Platforms that what PCI turned unconditionally just do select PCI
695 # in their config node. Platforms that want to choose at config
696 # time should select PPC_PCI_CHOICE
697 config PPC_PCI_CHOICE
701 bool "PCI support" if PPC_PCI_CHOICE
702 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
703 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
704 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
705 default PCI_QSPAN if !4xx && !CPM2 && 8xx
706 select ARCH_SUPPORTS_MSI
708 Find out whether your system includes a PCI bus. PCI is the name of
709 a bus system, i.e. the way the CPU talks to the other stuff inside
710 your box. If you say Y here, the kernel will include drivers and
711 infrastructure code to support PCI bus devices.
721 depends on !4xx && !CPM2 && 8xx
724 Say Y here if you have a system based on a Motorola 8xx-series
725 embedded processor with a QSPAN PCI interface, otherwise say N.
729 depends on PCI && 8260
730 select PPC_INDIRECT_PCI
734 bool "Enable workaround for MPC826x erratum PCI 9"
735 depends on PCI_8260 && !8272
739 prompt "IDMA channel for PCI 9 workaround"
742 config 8260_PCI9_IDMA1
745 config 8260_PCI9_IDMA2
748 config 8260_PCI9_IDMA3
751 config 8260_PCI9_IDMA4
756 source "drivers/pci/pcie/Kconfig"
758 source "drivers/pci/Kconfig"
760 source "drivers/pcmcia/Kconfig"
762 source "drivers/pci/hotplug/Kconfig"
769 bool "RapidIO support"
770 depends on HAS_RAPIDIO
772 If you say Y here, the kernel will include drivers and
773 infrastructure code to support RapidIO interconnect devices.
775 source "drivers/rapidio/Kconfig"
779 menu "Advanced setup"
782 config ADVANCED_OPTIONS
783 bool "Prompt for advanced kernel configuration options"
785 This option will enable prompting for a variety of advanced kernel
786 configuration options. These options can cause the kernel to not
787 work if they are set incorrectly, but can be used to optimize certain
788 aspects of kernel memory management.
790 Unless you know what you are doing, say N here.
792 comment "Default settings for advanced configuration options are used"
793 depends on !ADVANCED_OPTIONS
795 config LOWMEM_SIZE_BOOL
796 bool "Set maximum low memory"
797 depends on ADVANCED_OPTIONS
799 This option allows you to set the maximum amount of memory which
800 will be used as "low memory", that is, memory which the kernel can
801 access directly, without having to set up a kernel virtual mapping.
802 This can be useful in optimizing the layout of kernel virtual
805 Say N here unless you know what you are doing.
808 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
811 config LOWMEM_CAM_NUM_BOOL
812 bool "Set number of CAMs to use to map low memory"
813 depends on ADVANCED_OPTIONS && FSL_BOOKE
815 This option allows you to set the maximum number of CAM slots that
816 will be used to map low memory. There are a limited number of slots
817 available and even more limited number that will fit in the L1 MMU.
818 However, using more entries will allow mapping more low memory. This
819 can be useful in optimizing the layout of kernel virtual memory.
821 Say N here unless you know what you are doing.
823 config LOWMEM_CAM_NUM
825 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
829 bool "Build a relocatable kernel (EXPERIMENTAL)"
830 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
832 This builds a kernel image that is capable of running at the
833 location the kernel is loaded at (some alignment restrictions may
836 One use is for the kexec on panic case where the recovery kernel
837 must live at a different physical address than the primary
840 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
841 it has been loaded at and the compile time physical addresses
842 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
843 setting can still be useful to bootwrappers that need to know the
844 load location of the kernel (eg. u-boot/mkimage).
846 config PAGE_OFFSET_BOOL
847 bool "Set custom page offset address"
848 depends on ADVANCED_OPTIONS
850 This option allows you to set the kernel virtual address at which
851 the kernel will map low memory. This can be useful in optimizing
852 the virtual memory layout of the system.
854 Say N here unless you know what you are doing.
857 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
860 config KERNEL_START_BOOL
861 bool "Set custom kernel base address"
862 depends on ADVANCED_OPTIONS
864 This option allows you to set the kernel virtual address at which
865 the kernel will be loaded. Normally this should match PAGE_OFFSET
866 however there are times (like kdump) that one might not want them
869 Say N here unless you know what you are doing.
872 hex "Virtual address of kernel base" if KERNEL_START_BOOL
873 default PAGE_OFFSET if PAGE_OFFSET_BOOL
874 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
877 config PHYSICAL_START_BOOL
878 bool "Set physical address where the kernel is loaded"
879 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
881 This gives the physical address where the kernel is loaded.
883 Say N here unless you know what you are doing.
885 config PHYSICAL_START
886 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
887 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
890 config PHYSICAL_ALIGN
892 default "0x04000000" if FSL_BOOKE
894 This value puts the alignment restrictions on physical address
895 where kernel is loaded and run from. Kernel is compiled for an
896 address which meets above alignment restriction.
898 config TASK_SIZE_BOOL
899 bool "Set custom user task size"
900 depends on ADVANCED_OPTIONS
902 This option allows you to set the amount of virtual address space
903 allocated to user tasks. This can be useful in optimizing the
904 virtual memory layout of the system.
906 Say N here unless you know what you are doing.
909 hex "Size of user task space" if TASK_SIZE_BOOL
910 default "0x80000000" if PPC_PREP || PPC_8xx
913 config CONSISTENT_SIZE_BOOL
914 bool "Set custom consistent memory pool size"
915 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
917 This option allows you to set the size of the
918 consistent memory pool. This pool of virtual memory
919 is used to make consistent memory allocations.
921 config CONSISTENT_SIZE
922 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
923 default "0x00200000" if NOT_COHERENT_CACHE
926 bool "Pinned Kernel TLBs (860 ONLY)"
927 depends on ADVANCED_OPTIONS && 8xx
932 bool "Build a relocatable kernel"
934 This builds a kernel image that is capable of running anywhere
935 in the RMA (real memory area) at any 16k-aligned base address.
936 The kernel is linked as a position-independent executable (PIE)
937 and contains dynamic relocations which are processed early
938 in the bootup process.
940 One use is for the kexec on panic case where the recovery kernel
941 must live at a different physical address than the primary
946 default "0xc000000000000000"
949 default "0xc000000000000000"
950 config PHYSICAL_START
957 source "drivers/Kconfig"
961 source "arch/powerpc/sysdev/qe_lib/Kconfig"
965 source "arch/powerpc/Kconfig.debug"
967 source "security/Kconfig"
971 depends on COMPAT && KEYS
974 source "crypto/Kconfig"
984 source "arch/powerpc/kvm/Kconfig"