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_IRQ_SHOW
142 select GENERIC_IRQ_SHOW_LEVEL
143 select HAVE_RCU_TABLE_FREE if SMP
144 select HAVE_SYSCALL_TRACEPOINTS
153 select COMPAT_BINFMT_ELF
155 config SYSVIPC_COMPAT
157 depends on COMPAT && SYSVIPC
160 # All PPC32s use generic nvram driver through ppc_md
165 config SCHED_OMIT_FRAME_POINTER
169 config ARCH_MAY_HAVE_PC_FDC
171 default !PPC_PSERIES || PCI
176 config PPC_UDBG_16550
180 config GENERIC_TBSYNC
182 default y if PPC32 && SMP
194 config SYS_SUPPORTS_APM_EMULATION
195 default y if PMAC_APM_EMU
201 Used to allow a board to specify it wants an ePAPR compliant wrapper.
204 config DEFAULT_UIMAGE
207 Used to allow a board to specify it wants a uImage built by default
213 config ARCH_HIBERNATION_POSSIBLE
217 config ARCH_SUSPEND_POSSIBLE
219 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
220 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
222 config PPC_DCR_NATIVE
232 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
235 config PPC_OF_PLATFORM_PCI
238 depends on PPC64 # not supported on 32 bits yet
241 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
244 config PPC_ADV_DEBUG_REGS
246 depends on 40x || BOOKE
249 config PPC_ADV_DEBUG_IACS
251 depends on PPC_ADV_DEBUG_REGS
255 config PPC_ADV_DEBUG_DACS
257 depends on PPC_ADV_DEBUG_REGS
260 config PPC_ADV_DEBUG_DVCS
262 depends on PPC_ADV_DEBUG_REGS
266 config PPC_ADV_DEBUG_DAC_RANGE
268 depends on PPC_ADV_DEBUG_REGS && 44x
271 source "init/Kconfig"
273 source "kernel/Kconfig.freezer"
275 source "arch/powerpc/sysdev/Kconfig"
276 source "arch/powerpc/platforms/Kconfig"
278 menu "Kernel options"
281 bool "High memory support"
284 source kernel/time/Kconfig
285 source kernel/Kconfig.hz
286 source kernel/Kconfig.preempt
287 source "fs/Kconfig.binfmt"
289 config HUGETLB_PAGE_SIZE_VARIABLE
291 depends on HUGETLB_PAGE
294 config MATH_EMULATION
295 bool "Math emulation"
296 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
298 Some PowerPC chips designed for embedded applications do not have
299 a floating-point unit and therefore do not implement the
300 floating-point instructions in the PowerPC instruction set. If you
301 say Y here, the kernel will include code to emulate a floating-point
302 unit, which will allow programs that use floating-point
305 config 8XX_MINIMAL_FPEMU
306 bool "Minimal math emulation for 8xx"
307 depends on 8xx && !MATH_EMULATION
309 Older arch/ppc kernels still emulated a few floating point
310 instructions such as load and store, even when full math
311 emulation is disabled. Say "Y" here if you want to preserve
314 It is recommended that you build a soft-float userspace instead.
320 bool "SWIOTLB support"
324 Support for IO bounce buffering for systems without an IOMMU.
325 This allows us to DMA to the full physical address space on
326 platforms where the size of a physical address is larger
327 than the bus address. Not all platforms support this.
330 bool "Support for enabling/disabling CPUs"
331 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
333 Say Y here to be able to disable and re-enable individual
334 CPUs at runtime on SMP machines.
336 Say N if you are unsure.
338 config ARCH_CPU_PROBE_RELEASE
340 depends on HOTPLUG_CPU
342 config ARCH_ENABLE_MEMORY_HOTPLUG
345 config ARCH_HAS_WALK_MEMORY
348 config ARCH_ENABLE_MEMORY_HOTREMOVE
352 bool "kexec system call (EXPERIMENTAL)"
353 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
355 kexec is a system call that implements the ability to shutdown your
356 current kernel, and to start another kernel. It is like a reboot
357 but it is independent of the system firmware. And like a reboot
358 you can start any kernel with it, not just Linux.
360 The name comes from the similarity to the exec system call.
362 It is an ongoing process to be certain the hardware in a machine
363 is properly shutdown, so do not be surprised if this code does not
364 initially work for you. It may help to enable device hotplugging
365 support. As of this writing the exact hardware interface is
366 strongly in flux, so no good recommendation can be made.
369 bool "Build a kdump crash kernel"
370 depends on PPC64 || 6xx || FSL_BOOKE
371 select RELOCATABLE if PPC64 || FSL_BOOKE
373 Build a kernel suitable for use as a kdump capture kernel.
374 The same kernel binary can be used as production kernel and dump
378 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
379 depends on PPC_PSERIES && EXPERIMENTAL
381 Hypervisor-assisted dump is meant to be a kdump replacement
382 offering robustness and speed not possible without system
383 hypervisor assistance.
388 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
389 default y if PPC_PREP
392 bool "Distribute interrupts on all CPUs by default"
393 depends on SMP && !MV64360
395 This option gives the kernel permission to distribute IRQs across
396 multiple CPUs. Saying N here will route all IRQs to the first
397 CPU. Generally saying Y is safe, although some problems have been
398 reported with SMP Power Macintoshes with this option enabled.
403 default y if SMP && PPC_PSERIES
409 depends on NEED_MULTIPLE_NODES
411 config MAX_ACTIVE_REGIONS
413 default "256" if PPC64
416 config ARCH_SELECT_MEMORY_MODEL
420 config ARCH_FLATMEM_ENABLE
422 depends on (PPC64 && !NUMA) || PPC32
424 config ARCH_SPARSEMEM_ENABLE
427 select SPARSEMEM_VMEMMAP_ENABLE
429 config ARCH_SPARSEMEM_DEFAULT
431 depends on (SMP && PPC_PSERIES) || PPC_PS3
433 config ARCH_POPULATES_NODE_MAP
436 config SYS_SUPPORTS_HUGETLBFS
438 depends on PPC_BOOK3S_64
442 config ARCH_MEMORY_PROBE
444 depends on MEMORY_HOTPLUG
446 # Some NUMA nodes have memory ranges that span
447 # other nodes. Even though a pfn is valid and
448 # between a node's start and end pfns, it may not
449 # reside on that node. See memmap_init_zone()
451 config NODES_SPAN_OTHER_NODES
453 depends on NEED_MULTIPLE_NODES
455 config PPC_HAS_HASH_64K
461 bool "Using standard binutils settings"
465 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
466 Note, that kernel will be able to run only those applications,
467 which had been compiled using binutils later than 2.17.50.0.3 with
468 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
469 the older binutils, you can patch them with a trivial patch, which
470 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
476 Select the kernel logical page size. Increasing the page size
477 will reduce software overhead at each page boundary, allow
478 hardware prefetch mechanisms to be more effective, and allow
479 larger dma transfers increasing IO efficiency and reducing
480 overhead. However the utilization of memory will increase.
481 For example, each cached file will using a multiple of the
482 page size to hold its contents and the difference between the
483 end of file and the end of page is wasted.
485 Some dedicated systems, such as software raid serving with
486 accelerated calculations, have shown significant increases.
488 If you configure a 64 bit kernel for 64k pages but the
489 processor does not support them, then the kernel will simulate
490 them with 4k pages, loading them on demand, but with the
491 reduced software overhead and larger internal fragmentation.
492 For the 32 bit kernel, a large page option will not be offered
493 unless it is supported by the configured processor.
495 If unsure, choose 4K_PAGES.
501 bool "16k page size" if 44x
504 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
505 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
507 config PPC_256K_PAGES
508 bool "256k page size" if 44x
509 depends on !STDBINUTILS
511 Make the page size 256k.
513 As the ELF standard only requires alignment to support page
514 sizes up to 64k, you will need to compile all of your user
515 space applications with a non-standard binutils settings
516 (see the STDBINUTILS description for details).
518 Say N unless you know what you are doing.
522 config FORCE_MAX_ZONEORDER
523 int "Maximum zone order"
524 range 9 64 if PPC64 && PPC_64K_PAGES
525 default "9" if PPC64 && PPC_64K_PAGES
526 range 13 64 if PPC64 && !PPC_64K_PAGES
527 default "13" if PPC64 && !PPC_64K_PAGES
528 range 9 64 if PPC32 && PPC_16K_PAGES
529 default "9" if PPC32 && PPC_16K_PAGES
530 range 7 64 if PPC32 && PPC_64K_PAGES
531 default "7" if PPC32 && PPC_64K_PAGES
532 range 5 64 if PPC32 && PPC_256K_PAGES
533 default "5" if PPC32 && PPC_256K_PAGES
537 The kernel memory allocator divides physically contiguous memory
538 blocks into "zones", where each zone is a power of two number of
539 pages. This option selects the largest power of two that the kernel
540 keeps in the memory allocator. If you need to allocate very large
541 blocks of physically contiguous memory, then you may need to
544 This config option is actually maximum order plus one. For example,
545 a value of 11 means that the largest free memory block is 2^10 pages.
547 The page size is not necessarily 4KB. For example, on 64-bit
548 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
549 this in mind when choosing a value for this option.
551 config PPC_SUBPAGE_PROT
552 bool "Support setting protections for 4k subpages"
553 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
555 This option adds support for a system call to allow user programs
556 to set access permissions (read/write, readonly, or no access)
557 on the 4k subpages of each 64k page.
560 bool "SMT (Hyperthreading) scheduler support"
561 depends on PPC64 && SMP
563 SMT scheduler support improves the CPU scheduler's decision making
564 when dealing with POWER5 cpus at a cost of slightly increased
565 overhead in some places. If unsure say N here.
568 bool "Default bootloader kernel arguments"
571 string "Initial kernel command string"
572 depends on CMDLINE_BOOL
573 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
575 On some platforms, there is currently no way for the boot loader to
576 pass arguments to the kernel. For these platforms, you can supply
577 some command-line options at build time by entering them here. In
578 most cases you will need to specify the root device here.
581 string "Additional default image types"
583 List additional targets to be built by the bootwrapper here (separated
584 by spaces). This is useful for targets that depend of device tree
585 files in the .dts directory.
587 Targets in this list will be build as part of the default build
588 target, or when the user does a 'make zImage' or a
589 'make zImage.initrd'.
591 If unsure, leave blank
593 config ARCH_WANTS_FREEZER_CONTROL
597 source kernel/power/Kconfig
600 bool "Enable seccomp to safely compute untrusted bytecode"
604 This kernel feature is useful for number crunching applications
605 that may need to compute untrusted bytecode during their
606 execution. By using pipes or other transports made available to
607 the process as file descriptors supporting the read/write
608 syscalls, it's possible to isolate those applications in
609 their own address space using seccomp. Once seccomp is
610 enabled via /proc/<pid>/seccomp, it cannot be disabled
611 and the task is only allowed to execute a few safe syscalls
612 defined by each seccomp mode.
614 If unsure, say Y. Only embedded should say N here.
620 default !PPC_ISERIES || PCI
625 bool "Support for ISA-bus hardware"
626 depends on PPC_PREP || PPC_CHRP
629 Find out whether you have ISA slots on your motherboard. ISA is the
630 name of a bus system, i.e. the way the CPU talks to the other stuff
631 inside your box. If you have an Apple machine, say N here; if you
632 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
633 you have an embedded board, consult your board documentation.
639 config NEED_DMA_MAP_STATE
640 def_bool (PPC64 || NOT_COHERENT_CACHE)
642 config NEED_SG_DMA_LENGTH
645 config GENERIC_ISA_DMA
647 depends on ISA_DMA_API
650 config PPC_INDIRECT_PCI
653 default y if 40x || 44x
667 select PPC_INDIRECT_PCI
673 depends on SUSPEND && (PPC_85xx || PPC_86xx)
675 Freescale MPC85xx/MPC86xx power management controller support
676 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
681 depends on SUSPEND && (44x || 40x)
683 PPC4xx Clock Power Management (CPM) support (suspend/resume).
684 It also enables support for two different idle states (idle-wait
691 bool "Freescale Local Bus support"
694 Enables reporting of errors from the Freescale local bus
695 controller. Also contains some common code used by
696 drivers for specific local bus peripherals.
700 depends on PPC_83xx || QUICC_ENGINE || CPM2
702 Freescale General-purpose Timers support
704 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
708 # Platforms that what PCI turned unconditionally just do select PCI
709 # in their config node. Platforms that want to choose at config
710 # time should select PPC_PCI_CHOICE
711 config PPC_PCI_CHOICE
715 bool "PCI support" if PPC_PCI_CHOICE
716 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
717 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
718 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
719 default PCI_QSPAN if !4xx && !CPM2 && 8xx
720 select ARCH_SUPPORTS_MSI
722 Find out whether your system includes a PCI bus. PCI is the name of
723 a bus system, i.e. the way the CPU talks to the other stuff inside
724 your box. If you say Y here, the kernel will include drivers and
725 infrastructure code to support PCI bus devices.
735 depends on !4xx && !CPM2 && 8xx
738 Say Y here if you have a system based on a Motorola 8xx-series
739 embedded processor with a QSPAN PCI interface, otherwise say N.
743 depends on PCI && 8260
744 select PPC_INDIRECT_PCI
748 bool "Enable workaround for MPC826x erratum PCI 9"
749 depends on PCI_8260 && !8272
753 prompt "IDMA channel for PCI 9 workaround"
756 config 8260_PCI9_IDMA1
759 config 8260_PCI9_IDMA2
762 config 8260_PCI9_IDMA3
765 config 8260_PCI9_IDMA4
770 source "drivers/pci/pcie/Kconfig"
772 source "drivers/pci/Kconfig"
774 source "drivers/pcmcia/Kconfig"
776 source "drivers/pci/hotplug/Kconfig"
783 bool "RapidIO support"
784 depends on HAS_RAPIDIO || PCI
786 If you say Y here, the kernel will include drivers and
787 infrastructure code to support RapidIO interconnect devices.
790 bool "Freescale Embedded SRIO Controller support"
791 depends on RAPIDIO && HAS_RAPIDIO
794 Include support for RapidIO controller on Freescale embedded
795 processors (MPC8548, MPC8641, etc).
797 source "drivers/rapidio/Kconfig"
801 menu "Advanced setup"
804 config ADVANCED_OPTIONS
805 bool "Prompt for advanced kernel configuration options"
807 This option will enable prompting for a variety of advanced kernel
808 configuration options. These options can cause the kernel to not
809 work if they are set incorrectly, but can be used to optimize certain
810 aspects of kernel memory management.
812 Unless you know what you are doing, say N here.
814 comment "Default settings for advanced configuration options are used"
815 depends on !ADVANCED_OPTIONS
817 config LOWMEM_SIZE_BOOL
818 bool "Set maximum low memory"
819 depends on ADVANCED_OPTIONS
821 This option allows you to set the maximum amount of memory which
822 will be used as "low memory", that is, memory which the kernel can
823 access directly, without having to set up a kernel virtual mapping.
824 This can be useful in optimizing the layout of kernel virtual
827 Say N here unless you know what you are doing.
830 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
833 config LOWMEM_CAM_NUM_BOOL
834 bool "Set number of CAMs to use to map low memory"
835 depends on ADVANCED_OPTIONS && FSL_BOOKE
837 This option allows you to set the maximum number of CAM slots that
838 will be used to map low memory. There are a limited number of slots
839 available and even more limited number that will fit in the L1 MMU.
840 However, using more entries will allow mapping more low memory. This
841 can be useful in optimizing the layout of kernel virtual memory.
843 Say N here unless you know what you are doing.
845 config LOWMEM_CAM_NUM
847 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
851 bool "Build a relocatable kernel (EXPERIMENTAL)"
852 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
854 This builds a kernel image that is capable of running at the
855 location the kernel is loaded at (some alignment restrictions may
858 One use is for the kexec on panic case where the recovery kernel
859 must live at a different physical address than the primary
862 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
863 it has been loaded at and the compile time physical addresses
864 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
865 setting can still be useful to bootwrappers that need to know the
866 load location of the kernel (eg. u-boot/mkimage).
868 config PAGE_OFFSET_BOOL
869 bool "Set custom page offset address"
870 depends on ADVANCED_OPTIONS
872 This option allows you to set the kernel virtual address at which
873 the kernel will map low memory. This can be useful in optimizing
874 the virtual memory layout of the system.
876 Say N here unless you know what you are doing.
879 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
882 config KERNEL_START_BOOL
883 bool "Set custom kernel base address"
884 depends on ADVANCED_OPTIONS
886 This option allows you to set the kernel virtual address at which
887 the kernel will be loaded. Normally this should match PAGE_OFFSET
888 however there are times (like kdump) that one might not want them
891 Say N here unless you know what you are doing.
894 hex "Virtual address of kernel base" if KERNEL_START_BOOL
895 default PAGE_OFFSET if PAGE_OFFSET_BOOL
896 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
899 config PHYSICAL_START_BOOL
900 bool "Set physical address where the kernel is loaded"
901 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
903 This gives the physical address where the kernel is loaded.
905 Say N here unless you know what you are doing.
907 config PHYSICAL_START
908 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
909 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
912 config PHYSICAL_ALIGN
914 default "0x04000000" if FSL_BOOKE
916 This value puts the alignment restrictions on physical address
917 where kernel is loaded and run from. Kernel is compiled for an
918 address which meets above alignment restriction.
920 config TASK_SIZE_BOOL
921 bool "Set custom user task size"
922 depends on ADVANCED_OPTIONS
924 This option allows you to set the amount of virtual address space
925 allocated to user tasks. This can be useful in optimizing the
926 virtual memory layout of the system.
928 Say N here unless you know what you are doing.
931 hex "Size of user task space" if TASK_SIZE_BOOL
932 default "0x80000000" if PPC_PREP || PPC_8xx
935 config CONSISTENT_SIZE_BOOL
936 bool "Set custom consistent memory pool size"
937 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
939 This option allows you to set the size of the
940 consistent memory pool. This pool of virtual memory
941 is used to make consistent memory allocations.
943 config CONSISTENT_SIZE
944 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
945 default "0x00200000" if NOT_COHERENT_CACHE
948 bool "Pinned Kernel TLBs (860 ONLY)"
949 depends on ADVANCED_OPTIONS && 8xx
954 bool "Build a relocatable kernel"
956 This builds a kernel image that is capable of running anywhere
957 in the RMA (real memory area) at any 16k-aligned base address.
958 The kernel is linked as a position-independent executable (PIE)
959 and contains dynamic relocations which are processed early
960 in the bootup process.
962 One use is for the kexec on panic case where the recovery kernel
963 must live at a different physical address than the primary
968 default "0xc000000000000000"
971 default "0xc000000000000000"
972 config PHYSICAL_START
979 source "drivers/Kconfig"
983 source "arch/powerpc/sysdev/qe_lib/Kconfig"
987 source "arch/powerpc/Kconfig.debug"
989 source "security/Kconfig"
993 depends on COMPAT && KEYS
996 source "crypto/Kconfig"
1003 config PPC_LIB_RHEAP
1006 source "arch/powerpc/kvm/Kconfig"