1 source "arch/powerpc/platforms/Kconfig.cputype"
16 config ARCH_PHYS_ADDR_T_64BIT
17 def_bool PPC64 || PHYS_64BIT
23 config GENERIC_CMOS_UPDATE
26 config GENERIC_TIME_VSYSCALL
29 config GENERIC_CLOCKEVENTS
32 config GENERIC_HARDIRQS
36 config GENERIC_HARDIRQS_NO__DO_IRQ
40 config HAVE_SETUP_PER_CPU_AREA
43 config NEED_PER_CPU_EMBED_FIRST_CHUNK
51 int "Number of virtual interrupt numbers"
55 This defines the number of virtual interrupt numbers the kernel
56 can manage. Virtual interrupt numbers are what you see in
57 /proc/interrupts. If you configure your system to have too few,
58 drivers will fail to load or worse - handle with care.
60 config STACKTRACE_SUPPORT
64 config HAVE_LATENCYTOP_SUPPORT
67 config TRACE_IRQFLAGS_SUPPORT
71 config LOCKDEP_SUPPORT
75 config RWSEM_GENERIC_SPINLOCK
78 config RWSEM_XCHGADD_ALGORITHM
82 config GENERIC_LOCKBREAK
85 depends on SMP && PREEMPT
87 config ARCH_HAS_ILOG2_U32
91 config ARCH_HAS_ILOG2_U64
95 config GENERIC_HWEIGHT
99 config GENERIC_FIND_NEXT_BIT
106 Generic GPIO API support
108 config ARCH_NO_VIRT_TO_BUS
116 select HAVE_FTRACE_MCOUNT_RECORD
117 select HAVE_DYNAMIC_FTRACE
118 select HAVE_FUNCTION_TRACER
119 select HAVE_FUNCTION_GRAPH_TRACER
120 select ARCH_WANT_OPTIONAL_GPIOLIB
122 select HAVE_IOREMAP_PROT
123 select HAVE_EFFICIENT_UNALIGNED_ACCESS
125 select HAVE_ARCH_KGDB
126 select HAVE_KRETPROBES
127 select HAVE_ARCH_TRACEHOOK
129 select HAVE_DMA_ATTRS
130 select HAVE_DMA_API_DEBUG
131 select USE_GENERIC_SMP_HELPERS if SMP
133 select HAVE_SYSCALL_WRAPPERS if PPC64
134 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
146 select COMPAT_BINFMT_ELF
148 config SYSVIPC_COMPAT
150 depends on COMPAT && SYSVIPC
153 # All PPC32s use generic nvram driver through ppc_md
158 config SCHED_OMIT_FRAME_POINTER
162 config ARCH_MAY_HAVE_PC_FDC
164 default !PPC_PSERIES || PCI
169 config PPC_UDBG_16550
173 config GENERIC_TBSYNC
175 default y if PPC32 && SMP
187 config SYS_SUPPORTS_APM_EMULATION
188 default y if PMAC_APM_EMU
191 config DEFAULT_UIMAGE
194 Used to allow a board to specify it wants a uImage built by default
200 config ARCH_HIBERNATION_POSSIBLE
204 config ARCH_SUSPEND_POSSIBLE
206 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
207 PPC_85xx || PPC_86xx || PPC_PSERIES
209 config PPC_DCR_NATIVE
219 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
222 config PPC_OF_PLATFORM_PCI
225 depends on PPC64 # not supported on 32 bits yet
228 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
231 config PPC_ADV_DEBUG_REGS
233 depends on 40x || BOOKE
236 config PPC_ADV_DEBUG_IACS
238 depends on PPC_ADV_DEBUG_REGS
242 config PPC_ADV_DEBUG_DACS
244 depends on PPC_ADV_DEBUG_REGS
247 config PPC_ADV_DEBUG_DVCS
249 depends on PPC_ADV_DEBUG_REGS
253 config PPC_ADV_DEBUG_DAC_RANGE
255 depends on PPC_ADV_DEBUG_REGS && 44x
258 source "init/Kconfig"
260 source "kernel/Kconfig.freezer"
262 source "arch/powerpc/sysdev/Kconfig"
263 source "arch/powerpc/platforms/Kconfig"
265 menu "Kernel options"
268 bool "High memory support"
271 source kernel/time/Kconfig
272 source kernel/Kconfig.hz
273 source kernel/Kconfig.preempt
274 source "fs/Kconfig.binfmt"
276 config HUGETLB_PAGE_SIZE_VARIABLE
278 depends on HUGETLB_PAGE
281 config MATH_EMULATION
282 bool "Math emulation"
283 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
285 Some PowerPC chips designed for embedded applications do not have
286 a floating-point unit and therefore do not implement the
287 floating-point instructions in the PowerPC instruction set. If you
288 say Y here, the kernel will include code to emulate a floating-point
289 unit, which will allow programs that use floating-point
292 config 8XX_MINIMAL_FPEMU
293 bool "Minimal math emulation for 8xx"
294 depends on 8xx && !MATH_EMULATION
296 Older arch/ppc kernels still emulated a few floating point
297 instructions such as load and store, even when full math
298 emulation is disabled. Say "Y" here if you want to preserve
301 It is recommended that you build a soft-float userspace instead.
307 bool "SWIOTLB support"
311 Support for IO bounce buffering for systems without an IOMMU.
312 This allows us to DMA to the full physical address space on
313 platforms where the size of a physical address is larger
314 than the bus address. Not all platforms support this.
317 bool "Support for enabling/disabling CPUs"
318 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
320 Say Y here to be able to disable and re-enable individual
321 CPUs at runtime on SMP machines.
323 Say N if you are unsure.
325 config ARCH_CPU_PROBE_RELEASE
327 depends on HOTPLUG_CPU
329 config ARCH_ENABLE_MEMORY_HOTPLUG
332 config ARCH_HAS_WALK_MEMORY
335 config ARCH_ENABLE_MEMORY_HOTREMOVE
339 bool "kexec system call (EXPERIMENTAL)"
340 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
342 kexec is a system call that implements the ability to shutdown your
343 current kernel, and to start another kernel. It is like a reboot
344 but it is independent of the system firmware. And like a reboot
345 you can start any kernel with it, not just Linux.
347 The name comes from the similarity to the exec system call.
349 It is an ongoing process to be certain the hardware in a machine
350 is properly shutdown, so do not be surprised if this code does not
351 initially work for you. It may help to enable device hotplugging
352 support. As of this writing the exact hardware interface is
353 strongly in flux, so no good recommendation can be made.
356 bool "Build a kdump crash kernel"
357 depends on PPC64 || 6xx || FSL_BOOKE
358 select RELOCATABLE if PPC64 || FSL_BOOKE
360 Build a kernel suitable for use as a kdump capture kernel.
361 The same kernel binary can be used as production kernel and dump
365 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
366 depends on PPC_PSERIES && EXPERIMENTAL
368 Hypervisor-assisted dump is meant to be a kdump replacement
369 offering robustness and speed not possible without system
370 hypervisor assistance.
375 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
376 default y if PPC_PREP
379 bool "Distribute interrupts on all CPUs by default"
380 depends on SMP && !MV64360
382 This option gives the kernel permission to distribute IRQs across
383 multiple CPUs. Saying N here will route all IRQs to the first
384 CPU. Generally saying Y is safe, although some problems have been
385 reported with SMP Power Macintoshes with this option enabled.
388 bool "Support sparse irq numbering"
391 This enables support for sparse irqs. This is useful for distro
392 kernels that want to define a high CONFIG_NR_CPUS value but still
393 want to have low kernel memory footprint on smaller machines.
395 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
396 out the irq_desc[] array in a more NUMA-friendly way. )
398 If you don't know what to do here, say N.
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
594 config ARCH_WANTS_FREEZER_CONTROL
598 source kernel/power/Kconfig
602 bool "Enable seccomp to safely compute untrusted bytecode"
606 This kernel feature is useful for number crunching applications
607 that may need to compute untrusted bytecode during their
608 execution. By using pipes or other transports made available to
609 the process as file descriptors supporting the read/write
610 syscalls, it's possible to isolate those applications in
611 their own address space using seccomp. Once seccomp is
612 enabled via /proc/<pid>/seccomp, it cannot be disabled
613 and the task is only allowed to execute a few safe syscalls
614 defined by each seccomp mode.
616 If unsure, say Y. Only embedded should say N here.
622 default !PPC_ISERIES || PCI
627 bool "Support for ISA-bus hardware"
628 depends on PPC_PREP || PPC_CHRP
631 Find out whether you have ISA slots on your motherboard. ISA is the
632 name of a bus system, i.e. the way the CPU talks to the other stuff
633 inside your box. If you have an Apple machine, say N here; if you
634 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
635 you have an embedded board, consult your board documentation.
641 config NEED_DMA_MAP_STATE
642 def_bool (PPC64 || NOT_COHERENT_CACHE)
644 config NEED_SG_DMA_LENGTH
647 config GENERIC_ISA_DMA
649 depends on ISA_DMA_API
652 config PPC_INDIRECT_PCI
655 default y if 40x || 44x
669 select PPC_INDIRECT_PCI
675 depends on SUSPEND && (PPC_85xx || PPC_86xx)
677 Freescale MPC85xx/MPC86xx power management controller support
678 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
686 Freescale Localbus support
690 depends on PPC_83xx || QUICC_ENGINE || CPM2
692 Freescale General-purpose Timers support
694 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
698 # Platforms that what PCI turned unconditionally just do select PCI
699 # in their config node. Platforms that want to choose at config
700 # time should select PPC_PCI_CHOICE
701 config PPC_PCI_CHOICE
705 bool "PCI support" if PPC_PCI_CHOICE
706 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
707 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
708 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
709 default PCI_QSPAN if !4xx && !CPM2 && 8xx
710 select ARCH_SUPPORTS_MSI
712 Find out whether your system includes a PCI bus. PCI is the name of
713 a bus system, i.e. the way the CPU talks to the other stuff inside
714 your box. If you say Y here, the kernel will include drivers and
715 infrastructure code to support PCI bus devices.
725 depends on !4xx && !CPM2 && 8xx
728 Say Y here if you have a system based on a Motorola 8xx-series
729 embedded processor with a QSPAN PCI interface, otherwise say N.
733 depends on PCI && 8260
734 select PPC_INDIRECT_PCI
738 bool "Enable workaround for MPC826x erratum PCI 9"
739 depends on PCI_8260 && !8272
743 prompt "IDMA channel for PCI 9 workaround"
746 config 8260_PCI9_IDMA1
749 config 8260_PCI9_IDMA2
752 config 8260_PCI9_IDMA3
755 config 8260_PCI9_IDMA4
760 source "drivers/pci/pcie/Kconfig"
762 source "drivers/pci/Kconfig"
764 source "drivers/pcmcia/Kconfig"
766 source "drivers/pci/hotplug/Kconfig"
773 bool "RapidIO support"
774 depends on HAS_RAPIDIO
776 If you say Y here, the kernel will include drivers and
777 infrastructure code to support RapidIO interconnect devices.
779 source "drivers/rapidio/Kconfig"
783 menu "Advanced setup"
786 config ADVANCED_OPTIONS
787 bool "Prompt for advanced kernel configuration options"
789 This option will enable prompting for a variety of advanced kernel
790 configuration options. These options can cause the kernel to not
791 work if they are set incorrectly, but can be used to optimize certain
792 aspects of kernel memory management.
794 Unless you know what you are doing, say N here.
796 comment "Default settings for advanced configuration options are used"
797 depends on !ADVANCED_OPTIONS
799 config LOWMEM_SIZE_BOOL
800 bool "Set maximum low memory"
801 depends on ADVANCED_OPTIONS
803 This option allows you to set the maximum amount of memory which
804 will be used as "low memory", that is, memory which the kernel can
805 access directly, without having to set up a kernel virtual mapping.
806 This can be useful in optimizing the layout of kernel virtual
809 Say N here unless you know what you are doing.
812 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
815 config LOWMEM_CAM_NUM_BOOL
816 bool "Set number of CAMs to use to map low memory"
817 depends on ADVANCED_OPTIONS && FSL_BOOKE
819 This option allows you to set the maximum number of CAM slots that
820 will be used to map low memory. There are a limited number of slots
821 available and even more limited number that will fit in the L1 MMU.
822 However, using more entries will allow mapping more low memory. This
823 can be useful in optimizing the layout of kernel virtual memory.
825 Say N here unless you know what you are doing.
827 config LOWMEM_CAM_NUM
829 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
833 bool "Build a relocatable kernel (EXPERIMENTAL)"
834 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
836 This builds a kernel image that is capable of running at the
837 location the kernel is loaded at (some alignment restrictions may
840 One use is for the kexec on panic case where the recovery kernel
841 must live at a different physical address than the primary
844 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
845 it has been loaded at and the compile time physical addresses
846 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
847 setting can still be useful to bootwrappers that need to know the
848 load location of the kernel (eg. u-boot/mkimage).
850 config PAGE_OFFSET_BOOL
851 bool "Set custom page offset address"
852 depends on ADVANCED_OPTIONS
854 This option allows you to set the kernel virtual address at which
855 the kernel will map low memory. This can be useful in optimizing
856 the virtual memory layout of the system.
858 Say N here unless you know what you are doing.
861 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
864 config KERNEL_START_BOOL
865 bool "Set custom kernel base address"
866 depends on ADVANCED_OPTIONS
868 This option allows you to set the kernel virtual address at which
869 the kernel will be loaded. Normally this should match PAGE_OFFSET
870 however there are times (like kdump) that one might not want them
873 Say N here unless you know what you are doing.
876 hex "Virtual address of kernel base" if KERNEL_START_BOOL
877 default PAGE_OFFSET if PAGE_OFFSET_BOOL
878 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
881 config PHYSICAL_START_BOOL
882 bool "Set physical address where the kernel is loaded"
883 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
885 This gives the physical address where the kernel is loaded.
887 Say N here unless you know what you are doing.
889 config PHYSICAL_START
890 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
891 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
894 config PHYSICAL_ALIGN
896 default "0x04000000" if FSL_BOOKE
898 This value puts the alignment restrictions on physical address
899 where kernel is loaded and run from. Kernel is compiled for an
900 address which meets above alignment restriction.
902 config TASK_SIZE_BOOL
903 bool "Set custom user task size"
904 depends on ADVANCED_OPTIONS
906 This option allows you to set the amount of virtual address space
907 allocated to user tasks. This can be useful in optimizing the
908 virtual memory layout of the system.
910 Say N here unless you know what you are doing.
913 hex "Size of user task space" if TASK_SIZE_BOOL
914 default "0x80000000" if PPC_PREP || PPC_8xx
917 config CONSISTENT_SIZE_BOOL
918 bool "Set custom consistent memory pool size"
919 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
921 This option allows you to set the size of the
922 consistent memory pool. This pool of virtual memory
923 is used to make consistent memory allocations.
925 config CONSISTENT_SIZE
926 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
927 default "0x00200000" if NOT_COHERENT_CACHE
930 bool "Pinned Kernel TLBs (860 ONLY)"
931 depends on ADVANCED_OPTIONS && 8xx
936 bool "Build a relocatable kernel"
938 This builds a kernel image that is capable of running anywhere
939 in the RMA (real memory area) at any 16k-aligned base address.
940 The kernel is linked as a position-independent executable (PIE)
941 and contains dynamic relocations which are processed early
942 in the bootup process.
944 One use is for the kexec on panic case where the recovery kernel
945 must live at a different physical address than the primary
950 default "0xc000000000000000"
953 default "0xc000000000000000"
954 config PHYSICAL_START
961 source "drivers/Kconfig"
965 source "arch/powerpc/sysdev/qe_lib/Kconfig"
969 source "arch/powerpc/Kconfig.debug"
971 source "security/Kconfig"
975 depends on COMPAT && KEYS
978 source "crypto/Kconfig"
988 source "arch/powerpc/kvm/Kconfig"