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 GENERIC_HARDIRQS
43 config GENERIC_HARDIRQS_NO__DO_IRQ
47 config HAVE_SETUP_PER_CPU_AREA
50 config NEED_PER_CPU_EMBED_FIRST_CHUNK
58 int "Number of virtual interrupt numbers"
62 This defines the number of virtual interrupt numbers the kernel
63 can manage. Virtual interrupt numbers are what you see in
64 /proc/interrupts. If you configure your system to have too few,
65 drivers will fail to load or worse - handle with care.
67 config STACKTRACE_SUPPORT
71 config HAVE_LATENCYTOP_SUPPORT
74 config TRACE_IRQFLAGS_SUPPORT
78 config LOCKDEP_SUPPORT
82 config RWSEM_GENERIC_SPINLOCK
85 config RWSEM_XCHGADD_ALGORITHM
89 config GENERIC_LOCKBREAK
92 depends on SMP && PREEMPT
94 config ARCH_HAS_ILOG2_U32
98 config ARCH_HAS_ILOG2_U64
102 config GENERIC_HWEIGHT
106 config GENERIC_FIND_NEXT_BIT
113 Generic GPIO API support
115 config ARCH_NO_VIRT_TO_BUS
122 select OF_EARLY_FLATTREE
123 select HAVE_FTRACE_MCOUNT_RECORD
124 select HAVE_DYNAMIC_FTRACE
125 select HAVE_FUNCTION_TRACER
126 select HAVE_FUNCTION_GRAPH_TRACER
127 select ARCH_WANT_OPTIONAL_GPIOLIB
129 select HAVE_IOREMAP_PROT
130 select HAVE_EFFICIENT_UNALIGNED_ACCESS
132 select HAVE_ARCH_KGDB
133 select HAVE_KRETPROBES
134 select HAVE_ARCH_TRACEHOOK
136 select HAVE_DMA_ATTRS
137 select HAVE_DMA_API_DEBUG
138 select USE_GENERIC_SMP_HELPERS if SMP
140 select HAVE_SYSCALL_WRAPPERS if PPC64
141 select GENERIC_ATOMIC64 if PPC32
143 select HAVE_PERF_EVENTS
144 select HAVE_REGS_AND_STACK_ACCESS_API
145 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
154 select COMPAT_BINFMT_ELF
156 config SYSVIPC_COMPAT
158 depends on COMPAT && SYSVIPC
161 # All PPC32s use generic nvram driver through ppc_md
166 config SCHED_OMIT_FRAME_POINTER
170 config ARCH_MAY_HAVE_PC_FDC
172 default !PPC_PSERIES || PCI
177 config PPC_UDBG_16550
181 config GENERIC_TBSYNC
183 default y if PPC32 && SMP
195 config SYS_SUPPORTS_APM_EMULATION
196 default y if PMAC_APM_EMU
199 config DEFAULT_UIMAGE
202 Used to allow a board to specify it wants a uImage built by default
208 config ARCH_HIBERNATION_POSSIBLE
212 config ARCH_SUSPEND_POSSIBLE
214 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
215 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
217 config PPC_DCR_NATIVE
227 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
230 config PPC_OF_PLATFORM_PCI
233 depends on PPC64 # not supported on 32 bits yet
236 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
239 config PPC_ADV_DEBUG_REGS
241 depends on 40x || BOOKE
244 config PPC_ADV_DEBUG_IACS
246 depends on PPC_ADV_DEBUG_REGS
250 config PPC_ADV_DEBUG_DACS
252 depends on PPC_ADV_DEBUG_REGS
255 config PPC_ADV_DEBUG_DVCS
257 depends on PPC_ADV_DEBUG_REGS
261 config PPC_ADV_DEBUG_DAC_RANGE
263 depends on PPC_ADV_DEBUG_REGS && 44x
266 source "init/Kconfig"
268 source "kernel/Kconfig.freezer"
270 source "arch/powerpc/sysdev/Kconfig"
271 source "arch/powerpc/platforms/Kconfig"
273 menu "Kernel options"
276 bool "High memory support"
279 source kernel/time/Kconfig
280 source kernel/Kconfig.hz
281 source kernel/Kconfig.preempt
282 source "fs/Kconfig.binfmt"
284 config HUGETLB_PAGE_SIZE_VARIABLE
286 depends on HUGETLB_PAGE
289 config MATH_EMULATION
290 bool "Math emulation"
291 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
293 Some PowerPC chips designed for embedded applications do not have
294 a floating-point unit and therefore do not implement the
295 floating-point instructions in the PowerPC instruction set. If you
296 say Y here, the kernel will include code to emulate a floating-point
297 unit, which will allow programs that use floating-point
300 config 8XX_MINIMAL_FPEMU
301 bool "Minimal math emulation for 8xx"
302 depends on 8xx && !MATH_EMULATION
304 Older arch/ppc kernels still emulated a few floating point
305 instructions such as load and store, even when full math
306 emulation is disabled. Say "Y" here if you want to preserve
309 It is recommended that you build a soft-float userspace instead.
315 bool "SWIOTLB support"
319 Support for IO bounce buffering for systems without an IOMMU.
320 This allows us to DMA to the full physical address space on
321 platforms where the size of a physical address is larger
322 than the bus address. Not all platforms support this.
325 bool "Support for enabling/disabling CPUs"
326 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
328 Say Y here to be able to disable and re-enable individual
329 CPUs at runtime on SMP machines.
331 Say N if you are unsure.
333 config ARCH_CPU_PROBE_RELEASE
335 depends on HOTPLUG_CPU
337 config ARCH_ENABLE_MEMORY_HOTPLUG
340 config ARCH_HAS_WALK_MEMORY
343 config ARCH_ENABLE_MEMORY_HOTREMOVE
347 bool "kexec system call (EXPERIMENTAL)"
348 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
350 kexec is a system call that implements the ability to shutdown your
351 current kernel, and to start another kernel. It is like a reboot
352 but it is independent of the system firmware. And like a reboot
353 you can start any kernel with it, not just Linux.
355 The name comes from the similarity to the exec system call.
357 It is an ongoing process to be certain the hardware in a machine
358 is properly shutdown, so do not be surprised if this code does not
359 initially work for you. It may help to enable device hotplugging
360 support. As of this writing the exact hardware interface is
361 strongly in flux, so no good recommendation can be made.
364 bool "Build a kdump crash kernel"
365 depends on PPC64 || 6xx || FSL_BOOKE
366 select RELOCATABLE if PPC64 || FSL_BOOKE
368 Build a kernel suitable for use as a kdump capture kernel.
369 The same kernel binary can be used as production kernel and dump
373 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
374 depends on PPC_PSERIES && EXPERIMENTAL
376 Hypervisor-assisted dump is meant to be a kdump replacement
377 offering robustness and speed not possible without system
378 hypervisor assistance.
383 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
384 default y if PPC_PREP
387 bool "Distribute interrupts on all CPUs by default"
388 depends on SMP && !MV64360
390 This option gives the kernel permission to distribute IRQs across
391 multiple CPUs. Saying N here will route all IRQs to the first
392 CPU. Generally saying Y is safe, although some problems have been
393 reported with SMP Power Macintoshes with this option enabled.
396 bool "Support sparse irq numbering"
399 This enables support for sparse irqs. This is useful for distro
400 kernels that want to define a high CONFIG_NR_CPUS value but still
401 want to have low kernel memory footprint on smaller machines.
403 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
404 out the irq_desc[] array in a more NUMA-friendly way. )
406 If you don't know what to do here, say N.
411 default y if SMP && PPC_PSERIES
417 depends on NEED_MULTIPLE_NODES
419 config MAX_ACTIVE_REGIONS
421 default "256" if PPC64
424 config ARCH_SELECT_MEMORY_MODEL
428 config ARCH_FLATMEM_ENABLE
430 depends on (PPC64 && !NUMA) || PPC32
432 config ARCH_SPARSEMEM_ENABLE
435 select SPARSEMEM_VMEMMAP_ENABLE
437 config ARCH_SPARSEMEM_DEFAULT
439 depends on (SMP && PPC_PSERIES) || PPC_PS3
441 config ARCH_POPULATES_NODE_MAP
444 config SYS_SUPPORTS_HUGETLBFS
446 depends on PPC_BOOK3S_64
450 config ARCH_MEMORY_PROBE
452 depends on MEMORY_HOTPLUG
454 # Some NUMA nodes have memory ranges that span
455 # other nodes. Even though a pfn is valid and
456 # between a node's start and end pfns, it may not
457 # reside on that node. See memmap_init_zone()
459 config NODES_SPAN_OTHER_NODES
461 depends on NEED_MULTIPLE_NODES
463 config PPC_HAS_HASH_64K
469 bool "Using standard binutils settings"
473 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
474 Note, that kernel will be able to run only those applications,
475 which had been compiled using binutils later than 2.17.50.0.3 with
476 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
477 the older binutils, you can patch them with a trivial patch, which
478 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
484 Select the kernel logical page size. Increasing the page size
485 will reduce software overhead at each page boundary, allow
486 hardware prefetch mechanisms to be more effective, and allow
487 larger dma transfers increasing IO efficiency and reducing
488 overhead. However the utilization of memory will increase.
489 For example, each cached file will using a multiple of the
490 page size to hold its contents and the difference between the
491 end of file and the end of page is wasted.
493 Some dedicated systems, such as software raid serving with
494 accelerated calculations, have shown significant increases.
496 If you configure a 64 bit kernel for 64k pages but the
497 processor does not support them, then the kernel will simulate
498 them with 4k pages, loading them on demand, but with the
499 reduced software overhead and larger internal fragmentation.
500 For the 32 bit kernel, a large page option will not be offered
501 unless it is supported by the configured processor.
503 If unsure, choose 4K_PAGES.
509 bool "16k page size" if 44x
512 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
513 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
515 config PPC_256K_PAGES
516 bool "256k page size" if 44x
517 depends on !STDBINUTILS
519 Make the page size 256k.
521 As the ELF standard only requires alignment to support page
522 sizes up to 64k, you will need to compile all of your user
523 space applications with a non-standard binutils settings
524 (see the STDBINUTILS description for details).
526 Say N unless you know what you are doing.
530 config FORCE_MAX_ZONEORDER
531 int "Maximum zone order"
532 range 9 64 if PPC64 && PPC_64K_PAGES
533 default "9" if PPC64 && PPC_64K_PAGES
534 range 13 64 if PPC64 && !PPC_64K_PAGES
535 default "13" if PPC64 && !PPC_64K_PAGES
536 range 9 64 if PPC32 && PPC_16K_PAGES
537 default "9" if PPC32 && PPC_16K_PAGES
538 range 7 64 if PPC32 && PPC_64K_PAGES
539 default "7" if PPC32 && PPC_64K_PAGES
540 range 5 64 if PPC32 && PPC_256K_PAGES
541 default "5" if PPC32 && PPC_256K_PAGES
545 The kernel memory allocator divides physically contiguous memory
546 blocks into "zones", where each zone is a power of two number of
547 pages. This option selects the largest power of two that the kernel
548 keeps in the memory allocator. If you need to allocate very large
549 blocks of physically contiguous memory, then you may need to
552 This config option is actually maximum order plus one. For example,
553 a value of 11 means that the largest free memory block is 2^10 pages.
555 The page size is not necessarily 4KB. For example, on 64-bit
556 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
557 this in mind when choosing a value for this option.
559 config PPC_SUBPAGE_PROT
560 bool "Support setting protections for 4k subpages"
561 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
563 This option adds support for a system call to allow user programs
564 to set access permissions (read/write, readonly, or no access)
565 on the 4k subpages of each 64k page.
568 bool "SMT (Hyperthreading) scheduler support"
569 depends on PPC64 && SMP
571 SMT scheduler support improves the CPU scheduler's decision making
572 when dealing with POWER5 cpus at a cost of slightly increased
573 overhead in some places. If unsure say N here.
576 bool "Default bootloader kernel arguments"
579 string "Initial kernel command string"
580 depends on CMDLINE_BOOL
581 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
583 On some platforms, there is currently no way for the boot loader to
584 pass arguments to the kernel. For these platforms, you can supply
585 some command-line options at build time by entering them here. In
586 most cases you will need to specify the root device here.
589 string "Additional default image types"
591 List additional targets to be built by the bootwrapper here (separated
592 by spaces). This is useful for targets that depend of device tree
593 files in the .dts directory.
595 Targets in this list will be build as part of the default build
596 target, or when the user does a 'make zImage' or a
597 'make zImage.initrd'.
599 If unsure, leave blank
601 config ARCH_WANTS_FREEZER_CONTROL
605 source kernel/power/Kconfig
608 bool "Enable seccomp to safely compute untrusted bytecode"
612 This kernel feature is useful for number crunching applications
613 that may need to compute untrusted bytecode during their
614 execution. By using pipes or other transports made available to
615 the process as file descriptors supporting the read/write
616 syscalls, it's possible to isolate those applications in
617 their own address space using seccomp. Once seccomp is
618 enabled via /proc/<pid>/seccomp, it cannot be disabled
619 and the task is only allowed to execute a few safe syscalls
620 defined by each seccomp mode.
622 If unsure, say Y. Only embedded should say N here.
628 default !PPC_ISERIES || PCI
633 bool "Support for ISA-bus hardware"
634 depends on PPC_PREP || PPC_CHRP
637 Find out whether you have ISA slots on your motherboard. ISA is the
638 name of a bus system, i.e. the way the CPU talks to the other stuff
639 inside your box. If you have an Apple machine, say N here; if you
640 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
641 you have an embedded board, consult your board documentation.
647 config NEED_DMA_MAP_STATE
648 def_bool (PPC64 || NOT_COHERENT_CACHE)
650 config NEED_SG_DMA_LENGTH
653 config GENERIC_ISA_DMA
655 depends on ISA_DMA_API
658 config PPC_INDIRECT_PCI
661 default y if 40x || 44x
675 select PPC_INDIRECT_PCI
681 depends on SUSPEND && (PPC_85xx || PPC_86xx)
683 Freescale MPC85xx/MPC86xx power management controller support
684 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
689 depends on SUSPEND && (44x || 40x)
691 PPC4xx Clock Power Management (CPM) support (suspend/resume).
692 It also enables support for two different idle states (idle-wait
699 bool "Freescale Local Bus support"
702 Enables reporting of errors from the Freescale local bus
703 controller. Also contains some common code used by
704 drivers for specific local bus peripherals.
708 depends on PPC_83xx || QUICC_ENGINE || CPM2
710 Freescale General-purpose Timers support
712 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
716 # Platforms that what PCI turned unconditionally just do select PCI
717 # in their config node. Platforms that want to choose at config
718 # time should select PPC_PCI_CHOICE
719 config PPC_PCI_CHOICE
723 bool "PCI support" if PPC_PCI_CHOICE
724 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
725 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
726 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
727 default PCI_QSPAN if !4xx && !CPM2 && 8xx
728 select ARCH_SUPPORTS_MSI
730 Find out whether your system includes a PCI bus. PCI is the name of
731 a bus system, i.e. the way the CPU talks to the other stuff inside
732 your box. If you say Y here, the kernel will include drivers and
733 infrastructure code to support PCI bus devices.
743 depends on !4xx && !CPM2 && 8xx
746 Say Y here if you have a system based on a Motorola 8xx-series
747 embedded processor with a QSPAN PCI interface, otherwise say N.
751 depends on PCI && 8260
752 select PPC_INDIRECT_PCI
756 bool "Enable workaround for MPC826x erratum PCI 9"
757 depends on PCI_8260 && !8272
761 prompt "IDMA channel for PCI 9 workaround"
764 config 8260_PCI9_IDMA1
767 config 8260_PCI9_IDMA2
770 config 8260_PCI9_IDMA3
773 config 8260_PCI9_IDMA4
778 source "drivers/pci/pcie/Kconfig"
780 source "drivers/pci/Kconfig"
782 source "drivers/pcmcia/Kconfig"
784 source "drivers/pci/hotplug/Kconfig"
791 bool "RapidIO support"
792 depends on HAS_RAPIDIO
794 If you say Y here, the kernel will include drivers and
795 infrastructure code to support RapidIO interconnect devices.
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"