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
152 select COMPAT_BINFMT_ELF
154 config SYSVIPC_COMPAT
156 depends on COMPAT && SYSVIPC
159 # All PPC32s use generic nvram driver through ppc_md
164 config SCHED_OMIT_FRAME_POINTER
168 config ARCH_MAY_HAVE_PC_FDC
170 default !PPC_PSERIES || PCI
175 config PPC_UDBG_16550
179 config GENERIC_TBSYNC
181 default y if PPC32 && SMP
193 config SYS_SUPPORTS_APM_EMULATION
194 default y if PMAC_APM_EMU
200 Used to allow a board to specify it wants an ePAPR compliant wrapper.
203 config DEFAULT_UIMAGE
206 Used to allow a board to specify it wants a uImage built by default
212 config ARCH_HIBERNATION_POSSIBLE
216 config ARCH_SUSPEND_POSSIBLE
218 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
219 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
221 config PPC_DCR_NATIVE
231 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
234 config PPC_OF_PLATFORM_PCI
237 depends on PPC64 # not supported on 32 bits yet
240 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
243 config PPC_ADV_DEBUG_REGS
245 depends on 40x || BOOKE
248 config PPC_ADV_DEBUG_IACS
250 depends on PPC_ADV_DEBUG_REGS
254 config PPC_ADV_DEBUG_DACS
256 depends on PPC_ADV_DEBUG_REGS
259 config PPC_ADV_DEBUG_DVCS
261 depends on PPC_ADV_DEBUG_REGS
265 config PPC_ADV_DEBUG_DAC_RANGE
267 depends on PPC_ADV_DEBUG_REGS && 44x
270 source "init/Kconfig"
272 source "kernel/Kconfig.freezer"
274 source "arch/powerpc/sysdev/Kconfig"
275 source "arch/powerpc/platforms/Kconfig"
277 menu "Kernel options"
280 bool "High memory support"
283 source kernel/time/Kconfig
284 source kernel/Kconfig.hz
285 source kernel/Kconfig.preempt
286 source "fs/Kconfig.binfmt"
288 config HUGETLB_PAGE_SIZE_VARIABLE
290 depends on HUGETLB_PAGE
293 config MATH_EMULATION
294 bool "Math emulation"
295 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
297 Some PowerPC chips designed for embedded applications do not have
298 a floating-point unit and therefore do not implement the
299 floating-point instructions in the PowerPC instruction set. If you
300 say Y here, the kernel will include code to emulate a floating-point
301 unit, which will allow programs that use floating-point
304 config 8XX_MINIMAL_FPEMU
305 bool "Minimal math emulation for 8xx"
306 depends on 8xx && !MATH_EMULATION
308 Older arch/ppc kernels still emulated a few floating point
309 instructions such as load and store, even when full math
310 emulation is disabled. Say "Y" here if you want to preserve
313 It is recommended that you build a soft-float userspace instead.
319 bool "SWIOTLB support"
323 Support for IO bounce buffering for systems without an IOMMU.
324 This allows us to DMA to the full physical address space on
325 platforms where the size of a physical address is larger
326 than the bus address. Not all platforms support this.
329 bool "Support for enabling/disabling CPUs"
330 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
332 Say Y here to be able to disable and re-enable individual
333 CPUs at runtime on SMP machines.
335 Say N if you are unsure.
337 config ARCH_CPU_PROBE_RELEASE
339 depends on HOTPLUG_CPU
341 config ARCH_ENABLE_MEMORY_HOTPLUG
344 config ARCH_HAS_WALK_MEMORY
347 config ARCH_ENABLE_MEMORY_HOTREMOVE
351 bool "kexec system call (EXPERIMENTAL)"
352 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
354 kexec is a system call that implements the ability to shutdown your
355 current kernel, and to start another kernel. It is like a reboot
356 but it is independent of the system firmware. And like a reboot
357 you can start any kernel with it, not just Linux.
359 The name comes from the similarity to the exec system call.
361 It is an ongoing process to be certain the hardware in a machine
362 is properly shutdown, so do not be surprised if this code does not
363 initially work for you. It may help to enable device hotplugging
364 support. As of this writing the exact hardware interface is
365 strongly in flux, so no good recommendation can be made.
368 bool "Build a kdump crash kernel"
369 depends on PPC64 || 6xx || FSL_BOOKE
370 select RELOCATABLE if PPC64 || FSL_BOOKE
372 Build a kernel suitable for use as a kdump capture kernel.
373 The same kernel binary can be used as production kernel and dump
377 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
378 depends on PPC_PSERIES && EXPERIMENTAL
380 Hypervisor-assisted dump is meant to be a kdump replacement
381 offering robustness and speed not possible without system
382 hypervisor assistance.
387 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
388 default y if PPC_PREP
391 bool "Distribute interrupts on all CPUs by default"
392 depends on SMP && !MV64360
394 This option gives the kernel permission to distribute IRQs across
395 multiple CPUs. Saying N here will route all IRQs to the first
396 CPU. Generally saying Y is safe, although some problems have been
397 reported with SMP Power Macintoshes with this option enabled.
402 default y if SMP && PPC_PSERIES
408 depends on NEED_MULTIPLE_NODES
410 config MAX_ACTIVE_REGIONS
412 default "256" if PPC64
415 config ARCH_SELECT_MEMORY_MODEL
419 config ARCH_FLATMEM_ENABLE
421 depends on (PPC64 && !NUMA) || PPC32
423 config ARCH_SPARSEMEM_ENABLE
426 select SPARSEMEM_VMEMMAP_ENABLE
428 config ARCH_SPARSEMEM_DEFAULT
430 depends on (SMP && PPC_PSERIES) || PPC_PS3
432 config ARCH_POPULATES_NODE_MAP
435 config SYS_SUPPORTS_HUGETLBFS
437 depends on PPC_BOOK3S_64
441 config ARCH_MEMORY_PROBE
443 depends on MEMORY_HOTPLUG
445 # Some NUMA nodes have memory ranges that span
446 # other nodes. Even though a pfn is valid and
447 # between a node's start and end pfns, it may not
448 # reside on that node. See memmap_init_zone()
450 config NODES_SPAN_OTHER_NODES
452 depends on NEED_MULTIPLE_NODES
454 config PPC_HAS_HASH_64K
460 bool "Using standard binutils settings"
464 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
465 Note, that kernel will be able to run only those applications,
466 which had been compiled using binutils later than 2.17.50.0.3 with
467 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
468 the older binutils, you can patch them with a trivial patch, which
469 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
475 Select the kernel logical page size. Increasing the page size
476 will reduce software overhead at each page boundary, allow
477 hardware prefetch mechanisms to be more effective, and allow
478 larger dma transfers increasing IO efficiency and reducing
479 overhead. However the utilization of memory will increase.
480 For example, each cached file will using a multiple of the
481 page size to hold its contents and the difference between the
482 end of file and the end of page is wasted.
484 Some dedicated systems, such as software raid serving with
485 accelerated calculations, have shown significant increases.
487 If you configure a 64 bit kernel for 64k pages but the
488 processor does not support them, then the kernel will simulate
489 them with 4k pages, loading them on demand, but with the
490 reduced software overhead and larger internal fragmentation.
491 For the 32 bit kernel, a large page option will not be offered
492 unless it is supported by the configured processor.
494 If unsure, choose 4K_PAGES.
500 bool "16k page size" if 44x
503 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
504 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
506 config PPC_256K_PAGES
507 bool "256k page size" if 44x
508 depends on !STDBINUTILS
510 Make the page size 256k.
512 As the ELF standard only requires alignment to support page
513 sizes up to 64k, you will need to compile all of your user
514 space applications with a non-standard binutils settings
515 (see the STDBINUTILS description for details).
517 Say N unless you know what you are doing.
521 config FORCE_MAX_ZONEORDER
522 int "Maximum zone order"
523 range 9 64 if PPC64 && PPC_64K_PAGES
524 default "9" if PPC64 && PPC_64K_PAGES
525 range 13 64 if PPC64 && !PPC_64K_PAGES
526 default "13" if PPC64 && !PPC_64K_PAGES
527 range 9 64 if PPC32 && PPC_16K_PAGES
528 default "9" if PPC32 && PPC_16K_PAGES
529 range 7 64 if PPC32 && PPC_64K_PAGES
530 default "7" if PPC32 && PPC_64K_PAGES
531 range 5 64 if PPC32 && PPC_256K_PAGES
532 default "5" if PPC32 && PPC_256K_PAGES
536 The kernel memory allocator divides physically contiguous memory
537 blocks into "zones", where each zone is a power of two number of
538 pages. This option selects the largest power of two that the kernel
539 keeps in the memory allocator. If you need to allocate very large
540 blocks of physically contiguous memory, then you may need to
543 This config option is actually maximum order plus one. For example,
544 a value of 11 means that the largest free memory block is 2^10 pages.
546 The page size is not necessarily 4KB. For example, on 64-bit
547 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
548 this in mind when choosing a value for this option.
550 config PPC_SUBPAGE_PROT
551 bool "Support setting protections for 4k subpages"
552 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
554 This option adds support for a system call to allow user programs
555 to set access permissions (read/write, readonly, or no access)
556 on the 4k subpages of each 64k page.
559 bool "SMT (Hyperthreading) scheduler support"
560 depends on PPC64 && SMP
562 SMT scheduler support improves the CPU scheduler's decision making
563 when dealing with POWER5 cpus at a cost of slightly increased
564 overhead in some places. If unsure say N here.
567 bool "Default bootloader kernel arguments"
570 string "Initial kernel command string"
571 depends on CMDLINE_BOOL
572 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
574 On some platforms, there is currently no way for the boot loader to
575 pass arguments to the kernel. For these platforms, you can supply
576 some command-line options at build time by entering them here. In
577 most cases you will need to specify the root device here.
580 string "Additional default image types"
582 List additional targets to be built by the bootwrapper here (separated
583 by spaces). This is useful for targets that depend of device tree
584 files in the .dts directory.
586 Targets in this list will be build as part of the default build
587 target, or when the user does a 'make zImage' or a
588 'make zImage.initrd'.
590 If unsure, leave blank
592 config ARCH_WANTS_FREEZER_CONTROL
596 source kernel/power/Kconfig
599 bool "Enable seccomp to safely compute untrusted bytecode"
603 This kernel feature is useful for number crunching applications
604 that may need to compute untrusted bytecode during their
605 execution. By using pipes or other transports made available to
606 the process as file descriptors supporting the read/write
607 syscalls, it's possible to isolate those applications in
608 their own address space using seccomp. Once seccomp is
609 enabled via /proc/<pid>/seccomp, it cannot be disabled
610 and the task is only allowed to execute a few safe syscalls
611 defined by each seccomp mode.
613 If unsure, say Y. Only embedded should say N here.
619 default !PPC_ISERIES || PCI
624 bool "Support for ISA-bus hardware"
625 depends on PPC_PREP || PPC_CHRP
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 or a PReP machine, say Y. If
632 you have an embedded board, consult your board documentation.
638 config NEED_DMA_MAP_STATE
639 def_bool (PPC64 || NOT_COHERENT_CACHE)
641 config NEED_SG_DMA_LENGTH
644 config GENERIC_ISA_DMA
646 depends on ISA_DMA_API
649 config PPC_INDIRECT_PCI
652 default y if 40x || 44x
666 select PPC_INDIRECT_PCI
672 depends on SUSPEND && (PPC_85xx || PPC_86xx)
674 Freescale MPC85xx/MPC86xx power management controller support
675 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
680 depends on SUSPEND && (44x || 40x)
682 PPC4xx Clock Power Management (CPM) support (suspend/resume).
683 It also enables support for two different idle states (idle-wait
690 bool "Freescale Local Bus support"
693 Enables reporting of errors from the Freescale local bus
694 controller. Also contains some common code used by
695 drivers for specific local bus peripherals.
699 depends on PPC_83xx || QUICC_ENGINE || CPM2
701 Freescale General-purpose Timers support
703 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
707 # Platforms that what PCI turned unconditionally just do select PCI
708 # in their config node. Platforms that want to choose at config
709 # time should select PPC_PCI_CHOICE
710 config PPC_PCI_CHOICE
714 bool "PCI support" if PPC_PCI_CHOICE
715 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
716 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
717 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
718 default PCI_QSPAN if !4xx && !CPM2 && 8xx
719 select ARCH_SUPPORTS_MSI
721 Find out whether your system includes a PCI bus. PCI is the name of
722 a bus system, i.e. the way the CPU talks to the other stuff inside
723 your box. If you say Y here, the kernel will include drivers and
724 infrastructure code to support PCI bus devices.
734 depends on !4xx && !CPM2 && 8xx
737 Say Y here if you have a system based on a Motorola 8xx-series
738 embedded processor with a QSPAN PCI interface, otherwise say N.
742 depends on PCI && 8260
743 select PPC_INDIRECT_PCI
747 bool "Enable workaround for MPC826x erratum PCI 9"
748 depends on PCI_8260 && !8272
752 prompt "IDMA channel for PCI 9 workaround"
755 config 8260_PCI9_IDMA1
758 config 8260_PCI9_IDMA2
761 config 8260_PCI9_IDMA3
764 config 8260_PCI9_IDMA4
769 source "drivers/pci/pcie/Kconfig"
771 source "drivers/pci/Kconfig"
773 source "drivers/pcmcia/Kconfig"
775 source "drivers/pci/hotplug/Kconfig"
782 bool "RapidIO support"
783 depends on HAS_RAPIDIO || PCI
785 If you say Y here, the kernel will include drivers and
786 infrastructure code to support RapidIO interconnect devices.
789 bool "Freescale Embedded SRIO Controller support"
790 depends on RAPIDIO && HAS_RAPIDIO
793 Include support for RapidIO controller on Freescale embedded
794 processors (MPC8548, MPC8641, etc).
796 source "drivers/rapidio/Kconfig"
800 menu "Advanced setup"
803 config ADVANCED_OPTIONS
804 bool "Prompt for advanced kernel configuration options"
806 This option will enable prompting for a variety of advanced kernel
807 configuration options. These options can cause the kernel to not
808 work if they are set incorrectly, but can be used to optimize certain
809 aspects of kernel memory management.
811 Unless you know what you are doing, say N here.
813 comment "Default settings for advanced configuration options are used"
814 depends on !ADVANCED_OPTIONS
816 config LOWMEM_SIZE_BOOL
817 bool "Set maximum low memory"
818 depends on ADVANCED_OPTIONS
820 This option allows you to set the maximum amount of memory which
821 will be used as "low memory", that is, memory which the kernel can
822 access directly, without having to set up a kernel virtual mapping.
823 This can be useful in optimizing the layout of kernel virtual
826 Say N here unless you know what you are doing.
829 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
832 config LOWMEM_CAM_NUM_BOOL
833 bool "Set number of CAMs to use to map low memory"
834 depends on ADVANCED_OPTIONS && FSL_BOOKE
836 This option allows you to set the maximum number of CAM slots that
837 will be used to map low memory. There are a limited number of slots
838 available and even more limited number that will fit in the L1 MMU.
839 However, using more entries will allow mapping more low memory. This
840 can be useful in optimizing the layout of kernel virtual memory.
842 Say N here unless you know what you are doing.
844 config LOWMEM_CAM_NUM
846 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
850 bool "Build a relocatable kernel (EXPERIMENTAL)"
851 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
853 This builds a kernel image that is capable of running at the
854 location the kernel is loaded at (some alignment restrictions may
857 One use is for the kexec on panic case where the recovery kernel
858 must live at a different physical address than the primary
861 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
862 it has been loaded at and the compile time physical addresses
863 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
864 setting can still be useful to bootwrappers that need to know the
865 load location of the kernel (eg. u-boot/mkimage).
867 config PAGE_OFFSET_BOOL
868 bool "Set custom page offset address"
869 depends on ADVANCED_OPTIONS
871 This option allows you to set the kernel virtual address at which
872 the kernel will map low memory. This can be useful in optimizing
873 the virtual memory layout of the system.
875 Say N here unless you know what you are doing.
878 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
881 config KERNEL_START_BOOL
882 bool "Set custom kernel base address"
883 depends on ADVANCED_OPTIONS
885 This option allows you to set the kernel virtual address at which
886 the kernel will be loaded. Normally this should match PAGE_OFFSET
887 however there are times (like kdump) that one might not want them
890 Say N here unless you know what you are doing.
893 hex "Virtual address of kernel base" if KERNEL_START_BOOL
894 default PAGE_OFFSET if PAGE_OFFSET_BOOL
895 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
898 config PHYSICAL_START_BOOL
899 bool "Set physical address where the kernel is loaded"
900 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
902 This gives the physical address where the kernel is loaded.
904 Say N here unless you know what you are doing.
906 config PHYSICAL_START
907 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
908 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
911 config PHYSICAL_ALIGN
913 default "0x04000000" if FSL_BOOKE
915 This value puts the alignment restrictions on physical address
916 where kernel is loaded and run from. Kernel is compiled for an
917 address which meets above alignment restriction.
919 config TASK_SIZE_BOOL
920 bool "Set custom user task size"
921 depends on ADVANCED_OPTIONS
923 This option allows you to set the amount of virtual address space
924 allocated to user tasks. This can be useful in optimizing the
925 virtual memory layout of the system.
927 Say N here unless you know what you are doing.
930 hex "Size of user task space" if TASK_SIZE_BOOL
931 default "0x80000000" if PPC_PREP || PPC_8xx
934 config CONSISTENT_SIZE_BOOL
935 bool "Set custom consistent memory pool size"
936 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
938 This option allows you to set the size of the
939 consistent memory pool. This pool of virtual memory
940 is used to make consistent memory allocations.
942 config CONSISTENT_SIZE
943 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
944 default "0x00200000" if NOT_COHERENT_CACHE
947 bool "Pinned Kernel TLBs (860 ONLY)"
948 depends on ADVANCED_OPTIONS && 8xx
953 bool "Build a relocatable kernel"
955 This builds a kernel image that is capable of running anywhere
956 in the RMA (real memory area) at any 16k-aligned base address.
957 The kernel is linked as a position-independent executable (PIE)
958 and contains dynamic relocations which are processed early
959 in the bootup process.
961 One use is for the kexec on panic case where the recovery kernel
962 must live at a different physical address than the primary
967 default "0xc000000000000000"
970 default "0xc000000000000000"
971 config PHYSICAL_START
978 source "drivers/Kconfig"
982 source "arch/powerpc/sysdev/qe_lib/Kconfig"
986 source "arch/powerpc/Kconfig.debug"
988 source "security/Kconfig"
992 depends on COMPAT && KEYS
995 source "crypto/Kconfig"
1002 config PPC_LIB_RHEAP
1005 source "arch/powerpc/kvm/Kconfig"