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
136 select HAVE_PERF_EVENTS
137 select HAVE_REGS_AND_STACK_ACCESS_API
138 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
147 select COMPAT_BINFMT_ELF
149 config SYSVIPC_COMPAT
151 depends on COMPAT && SYSVIPC
154 # All PPC32s use generic nvram driver through ppc_md
159 config SCHED_OMIT_FRAME_POINTER
163 config ARCH_MAY_HAVE_PC_FDC
165 default !PPC_PSERIES || PCI
170 config PPC_UDBG_16550
174 config GENERIC_TBSYNC
176 default y if PPC32 && SMP
188 config SYS_SUPPORTS_APM_EMULATION
189 default y if PMAC_APM_EMU
192 config DEFAULT_UIMAGE
195 Used to allow a board to specify it wants a uImage built by default
201 config ARCH_HIBERNATION_POSSIBLE
205 config ARCH_SUSPEND_POSSIBLE
207 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
208 PPC_85xx || PPC_86xx || PPC_PSERIES
210 config PPC_DCR_NATIVE
220 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
223 config PPC_OF_PLATFORM_PCI
226 depends on PPC64 # not supported on 32 bits yet
229 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
232 config PPC_ADV_DEBUG_REGS
234 depends on 40x || BOOKE
237 config PPC_ADV_DEBUG_IACS
239 depends on PPC_ADV_DEBUG_REGS
243 config PPC_ADV_DEBUG_DACS
245 depends on PPC_ADV_DEBUG_REGS
248 config PPC_ADV_DEBUG_DVCS
250 depends on PPC_ADV_DEBUG_REGS
254 config PPC_ADV_DEBUG_DAC_RANGE
256 depends on PPC_ADV_DEBUG_REGS && 44x
259 source "init/Kconfig"
261 source "kernel/Kconfig.freezer"
263 source "arch/powerpc/sysdev/Kconfig"
264 source "arch/powerpc/platforms/Kconfig"
266 menu "Kernel options"
269 bool "High memory support"
272 source kernel/time/Kconfig
273 source kernel/Kconfig.hz
274 source kernel/Kconfig.preempt
275 source "fs/Kconfig.binfmt"
277 config HUGETLB_PAGE_SIZE_VARIABLE
279 depends on HUGETLB_PAGE
282 config MATH_EMULATION
283 bool "Math emulation"
284 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
286 Some PowerPC chips designed for embedded applications do not have
287 a floating-point unit and therefore do not implement the
288 floating-point instructions in the PowerPC instruction set. If you
289 say Y here, the kernel will include code to emulate a floating-point
290 unit, which will allow programs that use floating-point
293 config 8XX_MINIMAL_FPEMU
294 bool "Minimal math emulation for 8xx"
295 depends on 8xx && !MATH_EMULATION
297 Older arch/ppc kernels still emulated a few floating point
298 instructions such as load and store, even when full math
299 emulation is disabled. Say "Y" here if you want to preserve
302 It is recommended that you build a soft-float userspace instead.
308 bool "SWIOTLB support"
312 Support for IO bounce buffering for systems without an IOMMU.
313 This allows us to DMA to the full physical address space on
314 platforms where the size of a physical address is larger
315 than the bus address. Not all platforms support this.
318 bool "Support for enabling/disabling CPUs"
319 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
321 Say Y here to be able to disable and re-enable individual
322 CPUs at runtime on SMP machines.
324 Say N if you are unsure.
326 config ARCH_CPU_PROBE_RELEASE
328 depends on HOTPLUG_CPU
330 config ARCH_ENABLE_MEMORY_HOTPLUG
333 config ARCH_HAS_WALK_MEMORY
336 config ARCH_ENABLE_MEMORY_HOTREMOVE
340 bool "kexec system call (EXPERIMENTAL)"
341 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
343 kexec is a system call that implements the ability to shutdown your
344 current kernel, and to start another kernel. It is like a reboot
345 but it is independent of the system firmware. And like a reboot
346 you can start any kernel with it, not just Linux.
348 The name comes from the similarity to the exec system call.
350 It is an ongoing process to be certain the hardware in a machine
351 is properly shutdown, so do not be surprised if this code does not
352 initially work for you. It may help to enable device hotplugging
353 support. As of this writing the exact hardware interface is
354 strongly in flux, so no good recommendation can be made.
357 bool "Build a kdump crash kernel"
358 depends on PPC64 || 6xx || FSL_BOOKE
359 select RELOCATABLE if PPC64 || FSL_BOOKE
361 Build a kernel suitable for use as a kdump capture kernel.
362 The same kernel binary can be used as production kernel and dump
366 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
367 depends on PPC_PSERIES && EXPERIMENTAL
369 Hypervisor-assisted dump is meant to be a kdump replacement
370 offering robustness and speed not possible without system
371 hypervisor assistance.
376 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
377 default y if PPC_PREP
380 bool "Distribute interrupts on all CPUs by default"
381 depends on SMP && !MV64360
383 This option gives the kernel permission to distribute IRQs across
384 multiple CPUs. Saying N here will route all IRQs to the first
385 CPU. Generally saying Y is safe, although some problems have been
386 reported with SMP Power Macintoshes with this option enabled.
389 bool "Support sparse irq numbering"
392 This enables support for sparse irqs. This is useful for distro
393 kernels that want to define a high CONFIG_NR_CPUS value but still
394 want to have low kernel memory footprint on smaller machines.
396 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
397 out the irq_desc[] array in a more NUMA-friendly way. )
399 If you don't know what to do here, say N.
404 default y if SMP && PPC_PSERIES
410 depends on NEED_MULTIPLE_NODES
412 config MAX_ACTIVE_REGIONS
414 default "256" if PPC64
417 config ARCH_SELECT_MEMORY_MODEL
421 config ARCH_FLATMEM_ENABLE
423 depends on (PPC64 && !NUMA) || PPC32
425 config ARCH_SPARSEMEM_ENABLE
428 select SPARSEMEM_VMEMMAP_ENABLE
430 config ARCH_SPARSEMEM_DEFAULT
432 depends on (SMP && PPC_PSERIES) || PPC_PS3
434 config ARCH_POPULATES_NODE_MAP
437 config SYS_SUPPORTS_HUGETLBFS
439 depends on PPC_BOOK3S_64
443 config ARCH_MEMORY_PROBE
445 depends on MEMORY_HOTPLUG
447 # Some NUMA nodes have memory ranges that span
448 # other nodes. Even though a pfn is valid and
449 # between a node's start and end pfns, it may not
450 # reside on that node. See memmap_init_zone()
452 config NODES_SPAN_OTHER_NODES
454 depends on NEED_MULTIPLE_NODES
456 config PPC_HAS_HASH_64K
462 bool "Using standard binutils settings"
466 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
467 Note, that kernel will be able to run only those applications,
468 which had been compiled using binutils later than 2.17.50.0.3 with
469 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
470 the older binutils, you can patch them with a trivial patch, which
471 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
477 Select the kernel logical page size. Increasing the page size
478 will reduce software overhead at each page boundary, allow
479 hardware prefetch mechanisms to be more effective, and allow
480 larger dma transfers increasing IO efficiency and reducing
481 overhead. However the utilization of memory will increase.
482 For example, each cached file will using a multiple of the
483 page size to hold its contents and the difference between the
484 end of file and the end of page is wasted.
486 Some dedicated systems, such as software raid serving with
487 accelerated calculations, have shown significant increases.
489 If you configure a 64 bit kernel for 64k pages but the
490 processor does not support them, then the kernel will simulate
491 them with 4k pages, loading them on demand, but with the
492 reduced software overhead and larger internal fragmentation.
493 For the 32 bit kernel, a large page option will not be offered
494 unless it is supported by the configured processor.
496 If unsure, choose 4K_PAGES.
502 bool "16k page size" if 44x
505 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
506 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
508 config PPC_256K_PAGES
509 bool "256k page size" if 44x
510 depends on !STDBINUTILS
512 Make the page size 256k.
514 As the ELF standard only requires alignment to support page
515 sizes up to 64k, you will need to compile all of your user
516 space applications with a non-standard binutils settings
517 (see the STDBINUTILS description for details).
519 Say N unless you know what you are doing.
523 config FORCE_MAX_ZONEORDER
524 int "Maximum zone order"
525 range 9 64 if PPC64 && PPC_64K_PAGES
526 default "9" if PPC64 && PPC_64K_PAGES
527 range 13 64 if PPC64 && !PPC_64K_PAGES
528 default "13" if PPC64 && !PPC_64K_PAGES
529 range 9 64 if PPC32 && PPC_16K_PAGES
530 default "9" if PPC32 && PPC_16K_PAGES
531 range 7 64 if PPC32 && PPC_64K_PAGES
532 default "7" if PPC32 && PPC_64K_PAGES
533 range 5 64 if PPC32 && PPC_256K_PAGES
534 default "5" if PPC32 && PPC_256K_PAGES
538 The kernel memory allocator divides physically contiguous memory
539 blocks into "zones", where each zone is a power of two number of
540 pages. This option selects the largest power of two that the kernel
541 keeps in the memory allocator. If you need to allocate very large
542 blocks of physically contiguous memory, then you may need to
545 This config option is actually maximum order plus one. For example,
546 a value of 11 means that the largest free memory block is 2^10 pages.
548 The page size is not necessarily 4KB. For example, on 64-bit
549 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
550 this in mind when choosing a value for this option.
552 config PPC_SUBPAGE_PROT
553 bool "Support setting protections for 4k subpages"
554 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
556 This option adds support for a system call to allow user programs
557 to set access permissions (read/write, readonly, or no access)
558 on the 4k subpages of each 64k page.
561 bool "SMT (Hyperthreading) scheduler support"
562 depends on PPC64 && SMP
564 SMT scheduler support improves the CPU scheduler's decision making
565 when dealing with POWER5 cpus at a cost of slightly increased
566 overhead in some places. If unsure say N here.
569 bool "Default bootloader kernel arguments"
572 string "Initial kernel command string"
573 depends on CMDLINE_BOOL
574 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
576 On some platforms, there is currently no way for the boot loader to
577 pass arguments to the kernel. For these platforms, you can supply
578 some command-line options at build time by entering them here. In
579 most cases you will need to specify the root device here.
582 string "Additional default image types"
584 List additional targets to be built by the bootwrapper here (separated
585 by spaces). This is useful for targets that depend of device tree
586 files in the .dts directory.
588 Targets in this list will be build as part of the default build
589 target, or when the user does a 'make zImage' or a
590 'make zImage.initrd'.
592 If unsure, leave blank
595 config ARCH_WANTS_FREEZER_CONTROL
599 source kernel/power/Kconfig
603 bool "Enable seccomp to safely compute untrusted bytecode"
607 This kernel feature is useful for number crunching applications
608 that may need to compute untrusted bytecode during their
609 execution. By using pipes or other transports made available to
610 the process as file descriptors supporting the read/write
611 syscalls, it's possible to isolate those applications in
612 their own address space using seccomp. Once seccomp is
613 enabled via /proc/<pid>/seccomp, it cannot be disabled
614 and the task is only allowed to execute a few safe syscalls
615 defined by each seccomp mode.
617 If unsure, say Y. Only embedded should say N here.
623 default !PPC_ISERIES || PCI
628 bool "Support for ISA-bus hardware"
629 depends on PPC_PREP || PPC_CHRP
632 Find out whether you have ISA slots on your motherboard. ISA is the
633 name of a bus system, i.e. the way the CPU talks to the other stuff
634 inside your box. If you have an Apple machine, say N here; if you
635 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
636 you have an embedded board, consult your board documentation.
642 config NEED_DMA_MAP_STATE
643 def_bool (PPC64 || NOT_COHERENT_CACHE)
645 config NEED_SG_DMA_LENGTH
648 config GENERIC_ISA_DMA
650 depends on ISA_DMA_API
653 config PPC_INDIRECT_PCI
656 default y if 40x || 44x
670 select PPC_INDIRECT_PCI
676 depends on SUSPEND && (PPC_85xx || PPC_86xx)
678 Freescale MPC85xx/MPC86xx power management controller support
679 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
687 Freescale Localbus support
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
777 If you say Y here, the kernel will include drivers and
778 infrastructure code to support RapidIO interconnect devices.
780 source "drivers/rapidio/Kconfig"
784 menu "Advanced setup"
787 config ADVANCED_OPTIONS
788 bool "Prompt for advanced kernel configuration options"
790 This option will enable prompting for a variety of advanced kernel
791 configuration options. These options can cause the kernel to not
792 work if they are set incorrectly, but can be used to optimize certain
793 aspects of kernel memory management.
795 Unless you know what you are doing, say N here.
797 comment "Default settings for advanced configuration options are used"
798 depends on !ADVANCED_OPTIONS
800 config LOWMEM_SIZE_BOOL
801 bool "Set maximum low memory"
802 depends on ADVANCED_OPTIONS
804 This option allows you to set the maximum amount of memory which
805 will be used as "low memory", that is, memory which the kernel can
806 access directly, without having to set up a kernel virtual mapping.
807 This can be useful in optimizing the layout of kernel virtual
810 Say N here unless you know what you are doing.
813 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
816 config LOWMEM_CAM_NUM_BOOL
817 bool "Set number of CAMs to use to map low memory"
818 depends on ADVANCED_OPTIONS && FSL_BOOKE
820 This option allows you to set the maximum number of CAM slots that
821 will be used to map low memory. There are a limited number of slots
822 available and even more limited number that will fit in the L1 MMU.
823 However, using more entries will allow mapping more low memory. This
824 can be useful in optimizing the layout of kernel virtual memory.
826 Say N here unless you know what you are doing.
828 config LOWMEM_CAM_NUM
830 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
834 bool "Build a relocatable kernel (EXPERIMENTAL)"
835 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
837 This builds a kernel image that is capable of running at the
838 location the kernel is loaded at (some alignment restrictions may
841 One use is for the kexec on panic case where the recovery kernel
842 must live at a different physical address than the primary
845 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
846 it has been loaded at and the compile time physical addresses
847 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
848 setting can still be useful to bootwrappers that need to know the
849 load location of the kernel (eg. u-boot/mkimage).
851 config PAGE_OFFSET_BOOL
852 bool "Set custom page offset address"
853 depends on ADVANCED_OPTIONS
855 This option allows you to set the kernel virtual address at which
856 the kernel will map low memory. This can be useful in optimizing
857 the virtual memory layout of the system.
859 Say N here unless you know what you are doing.
862 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
865 config KERNEL_START_BOOL
866 bool "Set custom kernel base address"
867 depends on ADVANCED_OPTIONS
869 This option allows you to set the kernel virtual address at which
870 the kernel will be loaded. Normally this should match PAGE_OFFSET
871 however there are times (like kdump) that one might not want them
874 Say N here unless you know what you are doing.
877 hex "Virtual address of kernel base" if KERNEL_START_BOOL
878 default PAGE_OFFSET if PAGE_OFFSET_BOOL
879 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
882 config PHYSICAL_START_BOOL
883 bool "Set physical address where the kernel is loaded"
884 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
886 This gives the physical address where the kernel is loaded.
888 Say N here unless you know what you are doing.
890 config PHYSICAL_START
891 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
892 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
895 config PHYSICAL_ALIGN
897 default "0x04000000" if FSL_BOOKE
899 This value puts the alignment restrictions on physical address
900 where kernel is loaded and run from. Kernel is compiled for an
901 address which meets above alignment restriction.
903 config TASK_SIZE_BOOL
904 bool "Set custom user task size"
905 depends on ADVANCED_OPTIONS
907 This option allows you to set the amount of virtual address space
908 allocated to user tasks. This can be useful in optimizing the
909 virtual memory layout of the system.
911 Say N here unless you know what you are doing.
914 hex "Size of user task space" if TASK_SIZE_BOOL
915 default "0x80000000" if PPC_PREP || PPC_8xx
918 config CONSISTENT_SIZE_BOOL
919 bool "Set custom consistent memory pool size"
920 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
922 This option allows you to set the size of the
923 consistent memory pool. This pool of virtual memory
924 is used to make consistent memory allocations.
926 config CONSISTENT_SIZE
927 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
928 default "0x00200000" if NOT_COHERENT_CACHE
931 bool "Pinned Kernel TLBs (860 ONLY)"
932 depends on ADVANCED_OPTIONS && 8xx
937 bool "Build a relocatable kernel"
939 This builds a kernel image that is capable of running anywhere
940 in the RMA (real memory area) at any 16k-aligned base address.
941 The kernel is linked as a position-independent executable (PIE)
942 and contains dynamic relocations which are processed early
943 in the bootup process.
945 One use is for the kexec on panic case where the recovery kernel
946 must live at a different physical address than the primary
951 default "0xc000000000000000"
954 default "0xc000000000000000"
955 config PHYSICAL_START
962 source "drivers/Kconfig"
966 source "arch/powerpc/sysdev/qe_lib/Kconfig"
970 source "arch/powerpc/Kconfig.debug"
972 source "security/Kconfig"
976 depends on COMPAT && KEYS
979 source "crypto/Kconfig"
989 source "arch/powerpc/kvm/Kconfig"