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
98 config GENERIC_FIND_BIT_LE
105 Generic GPIO API support
107 config ARCH_NO_VIRT_TO_BUS
114 select OF_EARLY_FLATTREE
115 select HAVE_FTRACE_MCOUNT_RECORD
116 select HAVE_DYNAMIC_FTRACE
117 select HAVE_FUNCTION_TRACER
118 select HAVE_FUNCTION_GRAPH_TRACER
119 select ARCH_WANT_OPTIONAL_GPIOLIB
121 select HAVE_IOREMAP_PROT
122 select HAVE_EFFICIENT_UNALIGNED_ACCESS
124 select HAVE_ARCH_KGDB
125 select HAVE_KRETPROBES
126 select HAVE_ARCH_TRACEHOOK
128 select HAVE_DMA_ATTRS
129 select HAVE_DMA_API_DEBUG
130 select USE_GENERIC_SMP_HELPERS if SMP
132 select HAVE_SYSCALL_WRAPPERS if PPC64
133 select GENERIC_ATOMIC64 if PPC32
135 select HAVE_PERF_EVENTS
136 select HAVE_REGS_AND_STACK_ACCESS_API
137 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
138 select HAVE_GENERIC_HARDIRQS
139 select HAVE_SPARSE_IRQ
141 select GENERIC_HARDIRQS_NO_DEPRECATED
150 select COMPAT_BINFMT_ELF
152 config SYSVIPC_COMPAT
154 depends on COMPAT && SYSVIPC
157 # All PPC32s use generic nvram driver through ppc_md
162 config SCHED_OMIT_FRAME_POINTER
166 config ARCH_MAY_HAVE_PC_FDC
168 default !PPC_PSERIES || PCI
173 config PPC_UDBG_16550
177 config GENERIC_TBSYNC
179 default y if PPC32 && SMP
191 config SYS_SUPPORTS_APM_EMULATION
192 default y if PMAC_APM_EMU
195 config DEFAULT_UIMAGE
198 Used to allow a board to specify it wants a uImage built by default
204 config ARCH_HIBERNATION_POSSIBLE
208 config ARCH_SUSPEND_POSSIBLE
210 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
211 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
213 config PPC_DCR_NATIVE
223 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
226 config PPC_OF_PLATFORM_PCI
229 depends on PPC64 # not supported on 32 bits yet
232 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
235 config PPC_ADV_DEBUG_REGS
237 depends on 40x || BOOKE
240 config PPC_ADV_DEBUG_IACS
242 depends on PPC_ADV_DEBUG_REGS
246 config PPC_ADV_DEBUG_DACS
248 depends on PPC_ADV_DEBUG_REGS
251 config PPC_ADV_DEBUG_DVCS
253 depends on PPC_ADV_DEBUG_REGS
257 config PPC_ADV_DEBUG_DAC_RANGE
259 depends on PPC_ADV_DEBUG_REGS && 44x
262 source "init/Kconfig"
264 source "kernel/Kconfig.freezer"
266 source "arch/powerpc/sysdev/Kconfig"
267 source "arch/powerpc/platforms/Kconfig"
269 menu "Kernel options"
272 bool "High memory support"
275 source kernel/time/Kconfig
276 source kernel/Kconfig.hz
277 source kernel/Kconfig.preempt
278 source "fs/Kconfig.binfmt"
280 config HUGETLB_PAGE_SIZE_VARIABLE
282 depends on HUGETLB_PAGE
285 config MATH_EMULATION
286 bool "Math emulation"
287 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
289 Some PowerPC chips designed for embedded applications do not have
290 a floating-point unit and therefore do not implement the
291 floating-point instructions in the PowerPC instruction set. If you
292 say Y here, the kernel will include code to emulate a floating-point
293 unit, which will allow programs that use floating-point
296 config 8XX_MINIMAL_FPEMU
297 bool "Minimal math emulation for 8xx"
298 depends on 8xx && !MATH_EMULATION
300 Older arch/ppc kernels still emulated a few floating point
301 instructions such as load and store, even when full math
302 emulation is disabled. Say "Y" here if you want to preserve
305 It is recommended that you build a soft-float userspace instead.
311 bool "SWIOTLB support"
315 Support for IO bounce buffering for systems without an IOMMU.
316 This allows us to DMA to the full physical address space on
317 platforms where the size of a physical address is larger
318 than the bus address. Not all platforms support this.
321 bool "Support for enabling/disabling CPUs"
322 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
324 Say Y here to be able to disable and re-enable individual
325 CPUs at runtime on SMP machines.
327 Say N if you are unsure.
329 config ARCH_CPU_PROBE_RELEASE
331 depends on HOTPLUG_CPU
333 config ARCH_ENABLE_MEMORY_HOTPLUG
336 config ARCH_HAS_WALK_MEMORY
339 config ARCH_ENABLE_MEMORY_HOTREMOVE
343 bool "kexec system call (EXPERIMENTAL)"
344 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
346 kexec is a system call that implements the ability to shutdown your
347 current kernel, and to start another kernel. It is like a reboot
348 but it is independent of the system firmware. And like a reboot
349 you can start any kernel with it, not just Linux.
351 The name comes from the similarity to the exec system call.
353 It is an ongoing process to be certain the hardware in a machine
354 is properly shutdown, so do not be surprised if this code does not
355 initially work for you. It may help to enable device hotplugging
356 support. As of this writing the exact hardware interface is
357 strongly in flux, so no good recommendation can be made.
360 bool "Build a kdump crash kernel"
361 depends on PPC64 || 6xx || FSL_BOOKE
362 select RELOCATABLE if PPC64 || FSL_BOOKE
364 Build a kernel suitable for use as a kdump capture kernel.
365 The same kernel binary can be used as production kernel and dump
369 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
370 depends on PPC_PSERIES && EXPERIMENTAL
372 Hypervisor-assisted dump is meant to be a kdump replacement
373 offering robustness and speed not possible without system
374 hypervisor assistance.
379 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
380 default y if PPC_PREP
383 bool "Distribute interrupts on all CPUs by default"
384 depends on SMP && !MV64360
386 This option gives the kernel permission to distribute IRQs across
387 multiple CPUs. Saying N here will route all IRQs to the first
388 CPU. Generally saying Y is safe, although some problems have been
389 reported with SMP Power Macintoshes with this option enabled.
394 default y if SMP && PPC_PSERIES
400 depends on NEED_MULTIPLE_NODES
402 config MAX_ACTIVE_REGIONS
404 default "256" if PPC64
407 config ARCH_SELECT_MEMORY_MODEL
411 config ARCH_FLATMEM_ENABLE
413 depends on (PPC64 && !NUMA) || PPC32
415 config ARCH_SPARSEMEM_ENABLE
418 select SPARSEMEM_VMEMMAP_ENABLE
420 config ARCH_SPARSEMEM_DEFAULT
422 depends on (SMP && PPC_PSERIES) || PPC_PS3
424 config ARCH_POPULATES_NODE_MAP
427 config SYS_SUPPORTS_HUGETLBFS
429 depends on PPC_BOOK3S_64
433 config ARCH_MEMORY_PROBE
435 depends on MEMORY_HOTPLUG
437 # Some NUMA nodes have memory ranges that span
438 # other nodes. Even though a pfn is valid and
439 # between a node's start and end pfns, it may not
440 # reside on that node. See memmap_init_zone()
442 config NODES_SPAN_OTHER_NODES
444 depends on NEED_MULTIPLE_NODES
446 config PPC_HAS_HASH_64K
452 bool "Using standard binutils settings"
456 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
457 Note, that kernel will be able to run only those applications,
458 which had been compiled using binutils later than 2.17.50.0.3 with
459 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
460 the older binutils, you can patch them with a trivial patch, which
461 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
467 Select the kernel logical page size. Increasing the page size
468 will reduce software overhead at each page boundary, allow
469 hardware prefetch mechanisms to be more effective, and allow
470 larger dma transfers increasing IO efficiency and reducing
471 overhead. However the utilization of memory will increase.
472 For example, each cached file will using a multiple of the
473 page size to hold its contents and the difference between the
474 end of file and the end of page is wasted.
476 Some dedicated systems, such as software raid serving with
477 accelerated calculations, have shown significant increases.
479 If you configure a 64 bit kernel for 64k pages but the
480 processor does not support them, then the kernel will simulate
481 them with 4k pages, loading them on demand, but with the
482 reduced software overhead and larger internal fragmentation.
483 For the 32 bit kernel, a large page option will not be offered
484 unless it is supported by the configured processor.
486 If unsure, choose 4K_PAGES.
492 bool "16k page size" if 44x
495 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
496 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
498 config PPC_256K_PAGES
499 bool "256k page size" if 44x
500 depends on !STDBINUTILS
502 Make the page size 256k.
504 As the ELF standard only requires alignment to support page
505 sizes up to 64k, you will need to compile all of your user
506 space applications with a non-standard binutils settings
507 (see the STDBINUTILS description for details).
509 Say N unless you know what you are doing.
513 config FORCE_MAX_ZONEORDER
514 int "Maximum zone order"
515 range 9 64 if PPC64 && PPC_64K_PAGES
516 default "9" if PPC64 && PPC_64K_PAGES
517 range 13 64 if PPC64 && !PPC_64K_PAGES
518 default "13" if PPC64 && !PPC_64K_PAGES
519 range 9 64 if PPC32 && PPC_16K_PAGES
520 default "9" if PPC32 && PPC_16K_PAGES
521 range 7 64 if PPC32 && PPC_64K_PAGES
522 default "7" if PPC32 && PPC_64K_PAGES
523 range 5 64 if PPC32 && PPC_256K_PAGES
524 default "5" if PPC32 && PPC_256K_PAGES
528 The kernel memory allocator divides physically contiguous memory
529 blocks into "zones", where each zone is a power of two number of
530 pages. This option selects the largest power of two that the kernel
531 keeps in the memory allocator. If you need to allocate very large
532 blocks of physically contiguous memory, then you may need to
535 This config option is actually maximum order plus one. For example,
536 a value of 11 means that the largest free memory block is 2^10 pages.
538 The page size is not necessarily 4KB. For example, on 64-bit
539 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
540 this in mind when choosing a value for this option.
542 config PPC_SUBPAGE_PROT
543 bool "Support setting protections for 4k subpages"
544 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
546 This option adds support for a system call to allow user programs
547 to set access permissions (read/write, readonly, or no access)
548 on the 4k subpages of each 64k page.
551 bool "SMT (Hyperthreading) scheduler support"
552 depends on PPC64 && SMP
554 SMT scheduler support improves the CPU scheduler's decision making
555 when dealing with POWER5 cpus at a cost of slightly increased
556 overhead in some places. If unsure say N here.
559 bool "Default bootloader kernel arguments"
562 string "Initial kernel command string"
563 depends on CMDLINE_BOOL
564 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
566 On some platforms, there is currently no way for the boot loader to
567 pass arguments to the kernel. For these platforms, you can supply
568 some command-line options at build time by entering them here. In
569 most cases you will need to specify the root device here.
572 string "Additional default image types"
574 List additional targets to be built by the bootwrapper here (separated
575 by spaces). This is useful for targets that depend of device tree
576 files in the .dts directory.
578 Targets in this list will be build as part of the default build
579 target, or when the user does a 'make zImage' or a
580 'make zImage.initrd'.
582 If unsure, leave blank
584 config ARCH_WANTS_FREEZER_CONTROL
588 source kernel/power/Kconfig
591 bool "Enable seccomp to safely compute untrusted bytecode"
595 This kernel feature is useful for number crunching applications
596 that may need to compute untrusted bytecode during their
597 execution. By using pipes or other transports made available to
598 the process as file descriptors supporting the read/write
599 syscalls, it's possible to isolate those applications in
600 their own address space using seccomp. Once seccomp is
601 enabled via /proc/<pid>/seccomp, it cannot be disabled
602 and the task is only allowed to execute a few safe syscalls
603 defined by each seccomp mode.
605 If unsure, say Y. Only embedded should say N here.
611 default !PPC_ISERIES || PCI
616 bool "Support for ISA-bus hardware"
617 depends on PPC_PREP || PPC_CHRP
620 Find out whether you have ISA slots on your motherboard. ISA is the
621 name of a bus system, i.e. the way the CPU talks to the other stuff
622 inside your box. If you have an Apple machine, say N here; if you
623 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
624 you have an embedded board, consult your board documentation.
630 config NEED_DMA_MAP_STATE
631 def_bool (PPC64 || NOT_COHERENT_CACHE)
633 config NEED_SG_DMA_LENGTH
636 config GENERIC_ISA_DMA
638 depends on ISA_DMA_API
641 config PPC_INDIRECT_PCI
644 default y if 40x || 44x
658 select PPC_INDIRECT_PCI
664 depends on SUSPEND && (PPC_85xx || PPC_86xx)
666 Freescale MPC85xx/MPC86xx power management controller support
667 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
672 depends on SUSPEND && (44x || 40x)
674 PPC4xx Clock Power Management (CPM) support (suspend/resume).
675 It also enables support for two different idle states (idle-wait
682 bool "Freescale Local Bus support"
685 Enables reporting of errors from the Freescale local bus
686 controller. Also contains some common code used by
687 drivers for specific local bus peripherals.
691 depends on PPC_83xx || QUICC_ENGINE || CPM2
693 Freescale General-purpose Timers support
695 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
699 # Platforms that what PCI turned unconditionally just do select PCI
700 # in their config node. Platforms that want to choose at config
701 # time should select PPC_PCI_CHOICE
702 config PPC_PCI_CHOICE
706 bool "PCI support" if PPC_PCI_CHOICE
707 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
708 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
709 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
710 default PCI_QSPAN if !4xx && !CPM2 && 8xx
711 select ARCH_SUPPORTS_MSI
713 Find out whether your system includes a PCI bus. PCI is the name of
714 a bus system, i.e. the way the CPU talks to the other stuff inside
715 your box. If you say Y here, the kernel will include drivers and
716 infrastructure code to support PCI bus devices.
726 depends on !4xx && !CPM2 && 8xx
729 Say Y here if you have a system based on a Motorola 8xx-series
730 embedded processor with a QSPAN PCI interface, otherwise say N.
734 depends on PCI && 8260
735 select PPC_INDIRECT_PCI
739 bool "Enable workaround for MPC826x erratum PCI 9"
740 depends on PCI_8260 && !8272
744 prompt "IDMA channel for PCI 9 workaround"
747 config 8260_PCI9_IDMA1
750 config 8260_PCI9_IDMA2
753 config 8260_PCI9_IDMA3
756 config 8260_PCI9_IDMA4
761 source "drivers/pci/pcie/Kconfig"
763 source "drivers/pci/Kconfig"
765 source "drivers/pcmcia/Kconfig"
767 source "drivers/pci/hotplug/Kconfig"
774 bool "RapidIO support"
775 depends on HAS_RAPIDIO || PCI
777 If you say Y here, the kernel will include drivers and
778 infrastructure code to support RapidIO interconnect devices.
781 bool "Freescale Embedded SRIO Controller support"
782 depends on RAPIDIO && HAS_RAPIDIO
785 Include support for RapidIO controller on Freescale embedded
786 processors (MPC8548, MPC8641, etc).
788 source "drivers/rapidio/Kconfig"
792 menu "Advanced setup"
795 config ADVANCED_OPTIONS
796 bool "Prompt for advanced kernel configuration options"
798 This option will enable prompting for a variety of advanced kernel
799 configuration options. These options can cause the kernel to not
800 work if they are set incorrectly, but can be used to optimize certain
801 aspects of kernel memory management.
803 Unless you know what you are doing, say N here.
805 comment "Default settings for advanced configuration options are used"
806 depends on !ADVANCED_OPTIONS
808 config LOWMEM_SIZE_BOOL
809 bool "Set maximum low memory"
810 depends on ADVANCED_OPTIONS
812 This option allows you to set the maximum amount of memory which
813 will be used as "low memory", that is, memory which the kernel can
814 access directly, without having to set up a kernel virtual mapping.
815 This can be useful in optimizing the layout of kernel virtual
818 Say N here unless you know what you are doing.
821 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
824 config LOWMEM_CAM_NUM_BOOL
825 bool "Set number of CAMs to use to map low memory"
826 depends on ADVANCED_OPTIONS && FSL_BOOKE
828 This option allows you to set the maximum number of CAM slots that
829 will be used to map low memory. There are a limited number of slots
830 available and even more limited number that will fit in the L1 MMU.
831 However, using more entries will allow mapping more low memory. This
832 can be useful in optimizing the layout of kernel virtual memory.
834 Say N here unless you know what you are doing.
836 config LOWMEM_CAM_NUM
838 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
842 bool "Build a relocatable kernel (EXPERIMENTAL)"
843 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
845 This builds a kernel image that is capable of running at the
846 location the kernel is loaded at (some alignment restrictions may
849 One use is for the kexec on panic case where the recovery kernel
850 must live at a different physical address than the primary
853 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
854 it has been loaded at and the compile time physical addresses
855 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
856 setting can still be useful to bootwrappers that need to know the
857 load location of the kernel (eg. u-boot/mkimage).
859 config PAGE_OFFSET_BOOL
860 bool "Set custom page offset address"
861 depends on ADVANCED_OPTIONS
863 This option allows you to set the kernel virtual address at which
864 the kernel will map low memory. This can be useful in optimizing
865 the virtual memory layout of the system.
867 Say N here unless you know what you are doing.
870 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
873 config KERNEL_START_BOOL
874 bool "Set custom kernel base address"
875 depends on ADVANCED_OPTIONS
877 This option allows you to set the kernel virtual address at which
878 the kernel will be loaded. Normally this should match PAGE_OFFSET
879 however there are times (like kdump) that one might not want them
882 Say N here unless you know what you are doing.
885 hex "Virtual address of kernel base" if KERNEL_START_BOOL
886 default PAGE_OFFSET if PAGE_OFFSET_BOOL
887 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
890 config PHYSICAL_START_BOOL
891 bool "Set physical address where the kernel is loaded"
892 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
894 This gives the physical address where the kernel is loaded.
896 Say N here unless you know what you are doing.
898 config PHYSICAL_START
899 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
900 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
903 config PHYSICAL_ALIGN
905 default "0x04000000" if FSL_BOOKE
907 This value puts the alignment restrictions on physical address
908 where kernel is loaded and run from. Kernel is compiled for an
909 address which meets above alignment restriction.
911 config TASK_SIZE_BOOL
912 bool "Set custom user task size"
913 depends on ADVANCED_OPTIONS
915 This option allows you to set the amount of virtual address space
916 allocated to user tasks. This can be useful in optimizing the
917 virtual memory layout of the system.
919 Say N here unless you know what you are doing.
922 hex "Size of user task space" if TASK_SIZE_BOOL
923 default "0x80000000" if PPC_PREP || PPC_8xx
926 config CONSISTENT_SIZE_BOOL
927 bool "Set custom consistent memory pool size"
928 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
930 This option allows you to set the size of the
931 consistent memory pool. This pool of virtual memory
932 is used to make consistent memory allocations.
934 config CONSISTENT_SIZE
935 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
936 default "0x00200000" if NOT_COHERENT_CACHE
939 bool "Pinned Kernel TLBs (860 ONLY)"
940 depends on ADVANCED_OPTIONS && 8xx
945 bool "Build a relocatable kernel"
947 This builds a kernel image that is capable of running anywhere
948 in the RMA (real memory area) at any 16k-aligned base address.
949 The kernel is linked as a position-independent executable (PIE)
950 and contains dynamic relocations which are processed early
951 in the bootup process.
953 One use is for the kexec on panic case where the recovery kernel
954 must live at a different physical address than the primary
959 default "0xc000000000000000"
962 default "0xc000000000000000"
963 config PHYSICAL_START
970 source "drivers/Kconfig"
974 source "arch/powerpc/sysdev/qe_lib/Kconfig"
978 source "arch/powerpc/Kconfig.debug"
980 source "security/Kconfig"
984 depends on COMPAT && KEYS
987 source "crypto/Kconfig"
997 source "arch/powerpc/kvm/Kconfig"