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
151 select COMPAT_BINFMT_ELF
153 config SYSVIPC_COMPAT
155 depends on COMPAT && SYSVIPC
158 # All PPC32s use generic nvram driver through ppc_md
163 config SCHED_OMIT_FRAME_POINTER
167 config ARCH_MAY_HAVE_PC_FDC
169 default !PPC_PSERIES || PCI
174 config PPC_UDBG_16550
178 config GENERIC_TBSYNC
180 default y if PPC32 && SMP
192 config SYS_SUPPORTS_APM_EMULATION
193 default y if PMAC_APM_EMU
199 Used to allow a board to specify it wants an ePAPR compliant wrapper.
202 config DEFAULT_UIMAGE
205 Used to allow a board to specify it wants a uImage built by default
211 config ARCH_HIBERNATION_POSSIBLE
215 config ARCH_SUSPEND_POSSIBLE
217 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
218 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
220 config PPC_DCR_NATIVE
230 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
233 config PPC_OF_PLATFORM_PCI
236 depends on PPC64 # not supported on 32 bits yet
239 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
242 config PPC_ADV_DEBUG_REGS
244 depends on 40x || BOOKE
247 config PPC_ADV_DEBUG_IACS
249 depends on PPC_ADV_DEBUG_REGS
253 config PPC_ADV_DEBUG_DACS
255 depends on PPC_ADV_DEBUG_REGS
258 config PPC_ADV_DEBUG_DVCS
260 depends on PPC_ADV_DEBUG_REGS
264 config PPC_ADV_DEBUG_DAC_RANGE
266 depends on PPC_ADV_DEBUG_REGS && 44x
269 source "init/Kconfig"
271 source "kernel/Kconfig.freezer"
273 source "arch/powerpc/sysdev/Kconfig"
274 source "arch/powerpc/platforms/Kconfig"
276 menu "Kernel options"
279 bool "High memory support"
282 source kernel/time/Kconfig
283 source kernel/Kconfig.hz
284 source kernel/Kconfig.preempt
285 source "fs/Kconfig.binfmt"
287 config HUGETLB_PAGE_SIZE_VARIABLE
289 depends on HUGETLB_PAGE
292 config MATH_EMULATION
293 bool "Math emulation"
294 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
296 Some PowerPC chips designed for embedded applications do not have
297 a floating-point unit and therefore do not implement the
298 floating-point instructions in the PowerPC instruction set. If you
299 say Y here, the kernel will include code to emulate a floating-point
300 unit, which will allow programs that use floating-point
303 config 8XX_MINIMAL_FPEMU
304 bool "Minimal math emulation for 8xx"
305 depends on 8xx && !MATH_EMULATION
307 Older arch/ppc kernels still emulated a few floating point
308 instructions such as load and store, even when full math
309 emulation is disabled. Say "Y" here if you want to preserve
312 It is recommended that you build a soft-float userspace instead.
318 bool "SWIOTLB support"
322 Support for IO bounce buffering for systems without an IOMMU.
323 This allows us to DMA to the full physical address space on
324 platforms where the size of a physical address is larger
325 than the bus address. Not all platforms support this.
328 bool "Support for enabling/disabling CPUs"
329 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
331 Say Y here to be able to disable and re-enable individual
332 CPUs at runtime on SMP machines.
334 Say N if you are unsure.
336 config ARCH_CPU_PROBE_RELEASE
338 depends on HOTPLUG_CPU
340 config ARCH_ENABLE_MEMORY_HOTPLUG
343 config ARCH_HAS_WALK_MEMORY
346 config ARCH_ENABLE_MEMORY_HOTREMOVE
350 bool "kexec system call (EXPERIMENTAL)"
351 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
353 kexec is a system call that implements the ability to shutdown your
354 current kernel, and to start another kernel. It is like a reboot
355 but it is independent of the system firmware. And like a reboot
356 you can start any kernel with it, not just Linux.
358 The name comes from the similarity to the exec system call.
360 It is an ongoing process to be certain the hardware in a machine
361 is properly shutdown, so do not be surprised if this code does not
362 initially work for you. It may help to enable device hotplugging
363 support. As of this writing the exact hardware interface is
364 strongly in flux, so no good recommendation can be made.
367 bool "Build a kdump crash kernel"
368 depends on PPC64 || 6xx || FSL_BOOKE
369 select RELOCATABLE if PPC64 || FSL_BOOKE
371 Build a kernel suitable for use as a kdump capture kernel.
372 The same kernel binary can be used as production kernel and dump
376 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
377 depends on PPC_PSERIES && EXPERIMENTAL
379 Hypervisor-assisted dump is meant to be a kdump replacement
380 offering robustness and speed not possible without system
381 hypervisor assistance.
386 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
387 default y if PPC_PREP
390 bool "Distribute interrupts on all CPUs by default"
391 depends on SMP && !MV64360
393 This option gives the kernel permission to distribute IRQs across
394 multiple CPUs. Saying N here will route all IRQs to the first
395 CPU. Generally saying Y is safe, although some problems have been
396 reported with SMP Power Macintoshes with this option enabled.
401 default y if SMP && PPC_PSERIES
407 depends on NEED_MULTIPLE_NODES
409 config MAX_ACTIVE_REGIONS
411 default "256" if PPC64
414 config ARCH_SELECT_MEMORY_MODEL
418 config ARCH_FLATMEM_ENABLE
420 depends on (PPC64 && !NUMA) || PPC32
422 config ARCH_SPARSEMEM_ENABLE
425 select SPARSEMEM_VMEMMAP_ENABLE
427 config ARCH_SPARSEMEM_DEFAULT
429 depends on (SMP && PPC_PSERIES) || PPC_PS3
431 config ARCH_POPULATES_NODE_MAP
434 config SYS_SUPPORTS_HUGETLBFS
436 depends on PPC_BOOK3S_64
440 config ARCH_MEMORY_PROBE
442 depends on MEMORY_HOTPLUG
444 # Some NUMA nodes have memory ranges that span
445 # other nodes. Even though a pfn is valid and
446 # between a node's start and end pfns, it may not
447 # reside on that node. See memmap_init_zone()
449 config NODES_SPAN_OTHER_NODES
451 depends on NEED_MULTIPLE_NODES
453 config PPC_HAS_HASH_64K
459 bool "Using standard binutils settings"
463 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
464 Note, that kernel will be able to run only those applications,
465 which had been compiled using binutils later than 2.17.50.0.3 with
466 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
467 the older binutils, you can patch them with a trivial patch, which
468 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
474 Select the kernel logical page size. Increasing the page size
475 will reduce software overhead at each page boundary, allow
476 hardware prefetch mechanisms to be more effective, and allow
477 larger dma transfers increasing IO efficiency and reducing
478 overhead. However the utilization of memory will increase.
479 For example, each cached file will using a multiple of the
480 page size to hold its contents and the difference between the
481 end of file and the end of page is wasted.
483 Some dedicated systems, such as software raid serving with
484 accelerated calculations, have shown significant increases.
486 If you configure a 64 bit kernel for 64k pages but the
487 processor does not support them, then the kernel will simulate
488 them with 4k pages, loading them on demand, but with the
489 reduced software overhead and larger internal fragmentation.
490 For the 32 bit kernel, a large page option will not be offered
491 unless it is supported by the configured processor.
493 If unsure, choose 4K_PAGES.
499 bool "16k page size" if 44x
502 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
503 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
505 config PPC_256K_PAGES
506 bool "256k page size" if 44x
507 depends on !STDBINUTILS
509 Make the page size 256k.
511 As the ELF standard only requires alignment to support page
512 sizes up to 64k, you will need to compile all of your user
513 space applications with a non-standard binutils settings
514 (see the STDBINUTILS description for details).
516 Say N unless you know what you are doing.
520 config FORCE_MAX_ZONEORDER
521 int "Maximum zone order"
522 range 9 64 if PPC64 && PPC_64K_PAGES
523 default "9" if PPC64 && PPC_64K_PAGES
524 range 13 64 if PPC64 && !PPC_64K_PAGES
525 default "13" if PPC64 && !PPC_64K_PAGES
526 range 9 64 if PPC32 && PPC_16K_PAGES
527 default "9" if PPC32 && PPC_16K_PAGES
528 range 7 64 if PPC32 && PPC_64K_PAGES
529 default "7" if PPC32 && PPC_64K_PAGES
530 range 5 64 if PPC32 && PPC_256K_PAGES
531 default "5" if PPC32 && PPC_256K_PAGES
535 The kernel memory allocator divides physically contiguous memory
536 blocks into "zones", where each zone is a power of two number of
537 pages. This option selects the largest power of two that the kernel
538 keeps in the memory allocator. If you need to allocate very large
539 blocks of physically contiguous memory, then you may need to
542 This config option is actually maximum order plus one. For example,
543 a value of 11 means that the largest free memory block is 2^10 pages.
545 The page size is not necessarily 4KB. For example, on 64-bit
546 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
547 this in mind when choosing a value for this option.
549 config PPC_SUBPAGE_PROT
550 bool "Support setting protections for 4k subpages"
551 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
553 This option adds support for a system call to allow user programs
554 to set access permissions (read/write, readonly, or no access)
555 on the 4k subpages of each 64k page.
558 bool "SMT (Hyperthreading) scheduler support"
559 depends on PPC64 && SMP
561 SMT scheduler support improves the CPU scheduler's decision making
562 when dealing with POWER5 cpus at a cost of slightly increased
563 overhead in some places. If unsure say N here.
566 bool "Default bootloader kernel arguments"
569 string "Initial kernel command string"
570 depends on CMDLINE_BOOL
571 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
573 On some platforms, there is currently no way for the boot loader to
574 pass arguments to the kernel. For these platforms, you can supply
575 some command-line options at build time by entering them here. In
576 most cases you will need to specify the root device here.
579 string "Additional default image types"
581 List additional targets to be built by the bootwrapper here (separated
582 by spaces). This is useful for targets that depend of device tree
583 files in the .dts directory.
585 Targets in this list will be build as part of the default build
586 target, or when the user does a 'make zImage' or a
587 'make zImage.initrd'.
589 If unsure, leave blank
591 config ARCH_WANTS_FREEZER_CONTROL
595 source kernel/power/Kconfig
598 bool "Enable seccomp to safely compute untrusted bytecode"
602 This kernel feature is useful for number crunching applications
603 that may need to compute untrusted bytecode during their
604 execution. By using pipes or other transports made available to
605 the process as file descriptors supporting the read/write
606 syscalls, it's possible to isolate those applications in
607 their own address space using seccomp. Once seccomp is
608 enabled via /proc/<pid>/seccomp, it cannot be disabled
609 and the task is only allowed to execute a few safe syscalls
610 defined by each seccomp mode.
612 If unsure, say Y. Only embedded should say N here.
618 default !PPC_ISERIES || PCI
623 bool "Support for ISA-bus hardware"
624 depends on PPC_PREP || PPC_CHRP
627 Find out whether you have ISA slots on your motherboard. ISA is the
628 name of a bus system, i.e. the way the CPU talks to the other stuff
629 inside your box. If you have an Apple machine, say N here; if you
630 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
631 you have an embedded board, consult your board documentation.
637 config NEED_DMA_MAP_STATE
638 def_bool (PPC64 || NOT_COHERENT_CACHE)
640 config NEED_SG_DMA_LENGTH
643 config GENERIC_ISA_DMA
645 depends on ISA_DMA_API
648 config PPC_INDIRECT_PCI
651 default y if 40x || 44x
665 select PPC_INDIRECT_PCI
671 depends on SUSPEND && (PPC_85xx || PPC_86xx)
673 Freescale MPC85xx/MPC86xx power management controller support
674 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
679 depends on SUSPEND && (44x || 40x)
681 PPC4xx Clock Power Management (CPM) support (suspend/resume).
682 It also enables support for two different idle states (idle-wait
689 bool "Freescale Local Bus support"
692 Enables reporting of errors from the Freescale local bus
693 controller. Also contains some common code used by
694 drivers for specific local bus peripherals.
698 depends on PPC_83xx || QUICC_ENGINE || CPM2
700 Freescale General-purpose Timers support
702 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
706 # Platforms that what PCI turned unconditionally just do select PCI
707 # in their config node. Platforms that want to choose at config
708 # time should select PPC_PCI_CHOICE
709 config PPC_PCI_CHOICE
713 bool "PCI support" if PPC_PCI_CHOICE
714 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
715 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
716 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
717 default PCI_QSPAN if !4xx && !CPM2 && 8xx
718 select ARCH_SUPPORTS_MSI
720 Find out whether your system includes a PCI bus. PCI is the name of
721 a bus system, i.e. the way the CPU talks to the other stuff inside
722 your box. If you say Y here, the kernel will include drivers and
723 infrastructure code to support PCI bus devices.
733 depends on !4xx && !CPM2 && 8xx
736 Say Y here if you have a system based on a Motorola 8xx-series
737 embedded processor with a QSPAN PCI interface, otherwise say N.
741 depends on PCI && 8260
742 select PPC_INDIRECT_PCI
746 bool "Enable workaround for MPC826x erratum PCI 9"
747 depends on PCI_8260 && !8272
751 prompt "IDMA channel for PCI 9 workaround"
754 config 8260_PCI9_IDMA1
757 config 8260_PCI9_IDMA2
760 config 8260_PCI9_IDMA3
763 config 8260_PCI9_IDMA4
768 source "drivers/pci/pcie/Kconfig"
770 source "drivers/pci/Kconfig"
772 source "drivers/pcmcia/Kconfig"
774 source "drivers/pci/hotplug/Kconfig"
781 bool "RapidIO support"
782 depends on HAS_RAPIDIO || PCI
784 If you say Y here, the kernel will include drivers and
785 infrastructure code to support RapidIO interconnect devices.
788 bool "Freescale Embedded SRIO Controller support"
789 depends on RAPIDIO && HAS_RAPIDIO
792 Include support for RapidIO controller on Freescale embedded
793 processors (MPC8548, MPC8641, etc).
795 source "drivers/rapidio/Kconfig"
799 menu "Advanced setup"
802 config ADVANCED_OPTIONS
803 bool "Prompt for advanced kernel configuration options"
805 This option will enable prompting for a variety of advanced kernel
806 configuration options. These options can cause the kernel to not
807 work if they are set incorrectly, but can be used to optimize certain
808 aspects of kernel memory management.
810 Unless you know what you are doing, say N here.
812 comment "Default settings for advanced configuration options are used"
813 depends on !ADVANCED_OPTIONS
815 config LOWMEM_SIZE_BOOL
816 bool "Set maximum low memory"
817 depends on ADVANCED_OPTIONS
819 This option allows you to set the maximum amount of memory which
820 will be used as "low memory", that is, memory which the kernel can
821 access directly, without having to set up a kernel virtual mapping.
822 This can be useful in optimizing the layout of kernel virtual
825 Say N here unless you know what you are doing.
828 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
831 config LOWMEM_CAM_NUM_BOOL
832 bool "Set number of CAMs to use to map low memory"
833 depends on ADVANCED_OPTIONS && FSL_BOOKE
835 This option allows you to set the maximum number of CAM slots that
836 will be used to map low memory. There are a limited number of slots
837 available and even more limited number that will fit in the L1 MMU.
838 However, using more entries will allow mapping more low memory. This
839 can be useful in optimizing the layout of kernel virtual memory.
841 Say N here unless you know what you are doing.
843 config LOWMEM_CAM_NUM
845 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
849 bool "Build a relocatable kernel (EXPERIMENTAL)"
850 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
852 This builds a kernel image that is capable of running at the
853 location the kernel is loaded at (some alignment restrictions may
856 One use is for the kexec on panic case where the recovery kernel
857 must live at a different physical address than the primary
860 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
861 it has been loaded at and the compile time physical addresses
862 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
863 setting can still be useful to bootwrappers that need to know the
864 load location of the kernel (eg. u-boot/mkimage).
866 config PAGE_OFFSET_BOOL
867 bool "Set custom page offset address"
868 depends on ADVANCED_OPTIONS
870 This option allows you to set the kernel virtual address at which
871 the kernel will map low memory. This can be useful in optimizing
872 the virtual memory layout of the system.
874 Say N here unless you know what you are doing.
877 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
880 config KERNEL_START_BOOL
881 bool "Set custom kernel base address"
882 depends on ADVANCED_OPTIONS
884 This option allows you to set the kernel virtual address at which
885 the kernel will be loaded. Normally this should match PAGE_OFFSET
886 however there are times (like kdump) that one might not want them
889 Say N here unless you know what you are doing.
892 hex "Virtual address of kernel base" if KERNEL_START_BOOL
893 default PAGE_OFFSET if PAGE_OFFSET_BOOL
894 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
897 config PHYSICAL_START_BOOL
898 bool "Set physical address where the kernel is loaded"
899 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
901 This gives the physical address where the kernel is loaded.
903 Say N here unless you know what you are doing.
905 config PHYSICAL_START
906 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
907 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
910 config PHYSICAL_ALIGN
912 default "0x04000000" if FSL_BOOKE
914 This value puts the alignment restrictions on physical address
915 where kernel is loaded and run from. Kernel is compiled for an
916 address which meets above alignment restriction.
918 config TASK_SIZE_BOOL
919 bool "Set custom user task size"
920 depends on ADVANCED_OPTIONS
922 This option allows you to set the amount of virtual address space
923 allocated to user tasks. This can be useful in optimizing the
924 virtual memory layout of the system.
926 Say N here unless you know what you are doing.
929 hex "Size of user task space" if TASK_SIZE_BOOL
930 default "0x80000000" if PPC_PREP || PPC_8xx
933 config CONSISTENT_SIZE_BOOL
934 bool "Set custom consistent memory pool size"
935 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
937 This option allows you to set the size of the
938 consistent memory pool. This pool of virtual memory
939 is used to make consistent memory allocations.
941 config CONSISTENT_SIZE
942 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
943 default "0x00200000" if NOT_COHERENT_CACHE
946 bool "Pinned Kernel TLBs (860 ONLY)"
947 depends on ADVANCED_OPTIONS && 8xx
952 bool "Build a relocatable kernel"
954 This builds a kernel image that is capable of running anywhere
955 in the RMA (real memory area) at any 16k-aligned base address.
956 The kernel is linked as a position-independent executable (PIE)
957 and contains dynamic relocations which are processed early
958 in the bootup process.
960 One use is for the kexec on panic case where the recovery kernel
961 must live at a different physical address than the primary
966 default "0xc000000000000000"
969 default "0xc000000000000000"
970 config PHYSICAL_START
977 source "drivers/Kconfig"
981 source "arch/powerpc/sysdev/qe_lib/Kconfig"
985 source "arch/powerpc/Kconfig.debug"
987 source "security/Kconfig"
991 depends on COMPAT && KEYS
994 source "crypto/Kconfig"
1001 config PPC_LIB_RHEAP
1004 source "arch/powerpc/kvm/Kconfig"