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
97 Generic GPIO API support
99 config ARCH_NO_VIRT_TO_BUS
106 select OF_EARLY_FLATTREE
107 select HAVE_FTRACE_MCOUNT_RECORD
108 select HAVE_DYNAMIC_FTRACE
109 select HAVE_FUNCTION_TRACER
110 select HAVE_FUNCTION_GRAPH_TRACER
111 select ARCH_WANT_OPTIONAL_GPIOLIB
113 select HAVE_IOREMAP_PROT
114 select HAVE_EFFICIENT_UNALIGNED_ACCESS
116 select HAVE_ARCH_KGDB
117 select HAVE_KRETPROBES
118 select HAVE_ARCH_TRACEHOOK
120 select HAVE_DMA_ATTRS
121 select HAVE_DMA_API_DEBUG
122 select USE_GENERIC_SMP_HELPERS if SMP
124 select HAVE_SYSCALL_WRAPPERS if PPC64
125 select GENERIC_ATOMIC64 if PPC32
127 select HAVE_PERF_EVENTS
128 select HAVE_REGS_AND_STACK_ACCESS_API
129 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
130 select HAVE_GENERIC_HARDIRQS
131 select HAVE_SPARSE_IRQ
133 select GENERIC_IRQ_SHOW
134 select GENERIC_IRQ_SHOW_LEVEL
135 select HAVE_RCU_TABLE_FREE if SMP
136 select HAVE_SYSCALL_TRACEPOINTS
137 select HAVE_BPF_JIT if (PPC64 && NET)
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
194 Used to allow a board to specify it wants an ePAPR compliant wrapper.
197 config DEFAULT_UIMAGE
200 Used to allow a board to specify it wants a uImage built by default
206 config ARCH_HIBERNATION_POSSIBLE
210 config ARCH_SUSPEND_POSSIBLE
212 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
213 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
215 config PPC_DCR_NATIVE
225 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
228 config PPC_OF_PLATFORM_PCI
231 depends on PPC64 # not supported on 32 bits yet
234 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
237 config PPC_ADV_DEBUG_REGS
239 depends on 40x || BOOKE
242 config PPC_ADV_DEBUG_IACS
244 depends on PPC_ADV_DEBUG_REGS
248 config PPC_ADV_DEBUG_DACS
250 depends on PPC_ADV_DEBUG_REGS
253 config PPC_ADV_DEBUG_DVCS
255 depends on PPC_ADV_DEBUG_REGS
259 config PPC_ADV_DEBUG_DAC_RANGE
261 depends on PPC_ADV_DEBUG_REGS && 44x
264 source "init/Kconfig"
266 source "kernel/Kconfig.freezer"
268 source "arch/powerpc/sysdev/Kconfig"
269 source "arch/powerpc/platforms/Kconfig"
271 menu "Kernel options"
274 bool "High memory support"
277 source kernel/time/Kconfig
278 source kernel/Kconfig.hz
279 source kernel/Kconfig.preempt
280 source "fs/Kconfig.binfmt"
282 config HUGETLB_PAGE_SIZE_VARIABLE
284 depends on HUGETLB_PAGE
287 config MATH_EMULATION
288 bool "Math emulation"
289 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
291 Some PowerPC chips designed for embedded applications do not have
292 a floating-point unit and therefore do not implement the
293 floating-point instructions in the PowerPC instruction set. If you
294 say Y here, the kernel will include code to emulate a floating-point
295 unit, which will allow programs that use floating-point
298 config 8XX_MINIMAL_FPEMU
299 bool "Minimal math emulation for 8xx"
300 depends on 8xx && !MATH_EMULATION
302 Older arch/ppc kernels still emulated a few floating point
303 instructions such as load and store, even when full math
304 emulation is disabled. Say "Y" here if you want to preserve
307 It is recommended that you build a soft-float userspace instead.
313 bool "SWIOTLB support"
317 Support for IO bounce buffering for systems without an IOMMU.
318 This allows us to DMA to the full physical address space on
319 platforms where the size of a physical address is larger
320 than the bus address. Not all platforms support this.
323 bool "Support for enabling/disabling CPUs"
324 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
326 Say Y here to be able to disable and re-enable individual
327 CPUs at runtime on SMP machines.
329 Say N if you are unsure.
331 config ARCH_CPU_PROBE_RELEASE
333 depends on HOTPLUG_CPU
335 config ARCH_ENABLE_MEMORY_HOTPLUG
338 config ARCH_HAS_WALK_MEMORY
341 config ARCH_ENABLE_MEMORY_HOTREMOVE
345 bool "kexec system call (EXPERIMENTAL)"
346 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
348 kexec is a system call that implements the ability to shutdown your
349 current kernel, and to start another kernel. It is like a reboot
350 but it is independent of the system firmware. And like a reboot
351 you can start any kernel with it, not just Linux.
353 The name comes from the similarity to the exec system call.
355 It is an ongoing process to be certain the hardware in a machine
356 is properly shutdown, so do not be surprised if this code does not
357 initially work for you. It may help to enable device hotplugging
358 support. As of this writing the exact hardware interface is
359 strongly in flux, so no good recommendation can be made.
362 bool "Build a kdump crash kernel"
363 depends on PPC64 || 6xx || FSL_BOOKE
364 select RELOCATABLE if PPC64 || FSL_BOOKE
366 Build a kernel suitable for use as a kdump capture kernel.
367 The same kernel binary can be used as production kernel and dump
371 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
372 depends on PPC_PSERIES && EXPERIMENTAL
374 Hypervisor-assisted dump is meant to be a kdump replacement
375 offering robustness and speed not possible without system
376 hypervisor assistance.
381 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
382 default y if PPC_PREP
385 bool "Distribute interrupts on all CPUs by default"
386 depends on SMP && !MV64360
388 This option gives the kernel permission to distribute IRQs across
389 multiple CPUs. Saying N here will route all IRQs to the first
390 CPU. Generally saying Y is safe, although some problems have been
391 reported with SMP Power Macintoshes with this option enabled.
396 default y if SMP && PPC_PSERIES
402 depends on NEED_MULTIPLE_NODES
404 config MAX_ACTIVE_REGIONS
406 default "256" if PPC64
409 config ARCH_SELECT_MEMORY_MODEL
413 config ARCH_FLATMEM_ENABLE
415 depends on (PPC64 && !NUMA) || PPC32
417 config ARCH_SPARSEMEM_ENABLE
420 select SPARSEMEM_VMEMMAP_ENABLE
422 config ARCH_SPARSEMEM_DEFAULT
424 depends on (SMP && PPC_PSERIES) || PPC_PS3
426 config ARCH_POPULATES_NODE_MAP
429 config SYS_SUPPORTS_HUGETLBFS
431 depends on PPC_BOOK3S_64
435 config ARCH_MEMORY_PROBE
437 depends on MEMORY_HOTPLUG
439 # Some NUMA nodes have memory ranges that span
440 # other nodes. Even though a pfn is valid and
441 # between a node's start and end pfns, it may not
442 # reside on that node. See memmap_init_zone()
444 config NODES_SPAN_OTHER_NODES
446 depends on NEED_MULTIPLE_NODES
448 config PPC_HAS_HASH_64K
454 bool "Using standard binutils settings"
458 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
459 Note, that kernel will be able to run only those applications,
460 which had been compiled using binutils later than 2.17.50.0.3 with
461 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
462 the older binutils, you can patch them with a trivial patch, which
463 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
469 Select the kernel logical page size. Increasing the page size
470 will reduce software overhead at each page boundary, allow
471 hardware prefetch mechanisms to be more effective, and allow
472 larger dma transfers increasing IO efficiency and reducing
473 overhead. However the utilization of memory will increase.
474 For example, each cached file will using a multiple of the
475 page size to hold its contents and the difference between the
476 end of file and the end of page is wasted.
478 Some dedicated systems, such as software raid serving with
479 accelerated calculations, have shown significant increases.
481 If you configure a 64 bit kernel for 64k pages but the
482 processor does not support them, then the kernel will simulate
483 them with 4k pages, loading them on demand, but with the
484 reduced software overhead and larger internal fragmentation.
485 For the 32 bit kernel, a large page option will not be offered
486 unless it is supported by the configured processor.
488 If unsure, choose 4K_PAGES.
494 bool "16k page size" if 44x
497 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
498 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
500 config PPC_256K_PAGES
501 bool "256k page size" if 44x
502 depends on !STDBINUTILS
504 Make the page size 256k.
506 As the ELF standard only requires alignment to support page
507 sizes up to 64k, you will need to compile all of your user
508 space applications with a non-standard binutils settings
509 (see the STDBINUTILS description for details).
511 Say N unless you know what you are doing.
515 config FORCE_MAX_ZONEORDER
516 int "Maximum zone order"
517 range 9 64 if PPC64 && PPC_64K_PAGES
518 default "9" if PPC64 && PPC_64K_PAGES
519 range 13 64 if PPC64 && !PPC_64K_PAGES
520 default "13" if PPC64 && !PPC_64K_PAGES
521 range 9 64 if PPC32 && PPC_16K_PAGES
522 default "9" if PPC32 && PPC_16K_PAGES
523 range 7 64 if PPC32 && PPC_64K_PAGES
524 default "7" if PPC32 && PPC_64K_PAGES
525 range 5 64 if PPC32 && PPC_256K_PAGES
526 default "5" if PPC32 && PPC_256K_PAGES
530 The kernel memory allocator divides physically contiguous memory
531 blocks into "zones", where each zone is a power of two number of
532 pages. This option selects the largest power of two that the kernel
533 keeps in the memory allocator. If you need to allocate very large
534 blocks of physically contiguous memory, then you may need to
537 This config option is actually maximum order plus one. For example,
538 a value of 11 means that the largest free memory block is 2^10 pages.
540 The page size is not necessarily 4KB. For example, on 64-bit
541 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
542 this in mind when choosing a value for this option.
544 config PPC_SUBPAGE_PROT
545 bool "Support setting protections for 4k subpages"
546 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
548 This option adds support for a system call to allow user programs
549 to set access permissions (read/write, readonly, or no access)
550 on the 4k subpages of each 64k page.
553 bool "SMT (Hyperthreading) scheduler support"
554 depends on PPC64 && SMP
556 SMT scheduler support improves the CPU scheduler's decision making
557 when dealing with POWER5 cpus at a cost of slightly increased
558 overhead in some places. If unsure say N here.
561 bool "Default bootloader kernel arguments"
564 string "Initial kernel command string"
565 depends on CMDLINE_BOOL
566 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
568 On some platforms, there is currently no way for the boot loader to
569 pass arguments to the kernel. For these platforms, you can supply
570 some command-line options at build time by entering them here. In
571 most cases you will need to specify the root device here.
574 string "Additional default image types"
576 List additional targets to be built by the bootwrapper here (separated
577 by spaces). This is useful for targets that depend of device tree
578 files in the .dts directory.
580 Targets in this list will be build as part of the default build
581 target, or when the user does a 'make zImage' or a
582 'make zImage.initrd'.
584 If unsure, leave blank
586 config ARCH_WANTS_FREEZER_CONTROL
590 source kernel/power/Kconfig
593 bool "Enable seccomp to safely compute untrusted bytecode"
597 This kernel feature is useful for number crunching applications
598 that may need to compute untrusted bytecode during their
599 execution. By using pipes or other transports made available to
600 the process as file descriptors supporting the read/write
601 syscalls, it's possible to isolate those applications in
602 their own address space using seccomp. Once seccomp is
603 enabled via /proc/<pid>/seccomp, it cannot be disabled
604 and the task is only allowed to execute a few safe syscalls
605 defined by each seccomp mode.
607 If unsure, say Y. Only embedded should say N here.
613 default !PPC_ISERIES || PCI
618 bool "Support for ISA-bus hardware"
619 depends on PPC_PREP || PPC_CHRP
622 Find out whether you have ISA slots on your motherboard. ISA is the
623 name of a bus system, i.e. the way the CPU talks to the other stuff
624 inside your box. If you have an Apple machine, say N here; if you
625 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
626 you have an embedded board, consult your board documentation.
632 config NEED_DMA_MAP_STATE
633 def_bool (PPC64 || NOT_COHERENT_CACHE)
635 config NEED_SG_DMA_LENGTH
638 config GENERIC_ISA_DMA
640 depends on ISA_DMA_API
643 config PPC_INDIRECT_PCI
646 default y if 40x || 44x
660 select PPC_INDIRECT_PCI
666 depends on SUSPEND && (PPC_85xx || PPC_86xx)
668 Freescale MPC85xx/MPC86xx power management controller support
669 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
674 depends on SUSPEND && (44x || 40x)
676 PPC4xx Clock Power Management (CPM) support (suspend/resume).
677 It also enables support for two different idle states (idle-wait
684 bool "Freescale Local Bus support"
687 Enables reporting of errors from the Freescale local bus
688 controller. Also contains some common code used by
689 drivers for specific local bus peripherals.
693 depends on PPC_83xx || QUICC_ENGINE || CPM2
695 Freescale General-purpose Timers support
697 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
701 # Platforms that what PCI turned unconditionally just do select PCI
702 # in their config node. Platforms that want to choose at config
703 # time should select PPC_PCI_CHOICE
704 config PPC_PCI_CHOICE
708 bool "PCI support" if PPC_PCI_CHOICE
709 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
710 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
711 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
712 default PCI_QSPAN if !4xx && !CPM2 && 8xx
713 select ARCH_SUPPORTS_MSI
715 Find out whether your system includes a PCI bus. PCI is the name of
716 a bus system, i.e. the way the CPU talks to the other stuff inside
717 your box. If you say Y here, the kernel will include drivers and
718 infrastructure code to support PCI bus devices.
728 depends on !4xx && !CPM2 && 8xx
731 Say Y here if you have a system based on a Motorola 8xx-series
732 embedded processor with a QSPAN PCI interface, otherwise say N.
736 depends on PCI && 8260
737 select PPC_INDIRECT_PCI
741 bool "Enable workaround for MPC826x erratum PCI 9"
742 depends on PCI_8260 && !8272
746 prompt "IDMA channel for PCI 9 workaround"
749 config 8260_PCI9_IDMA1
752 config 8260_PCI9_IDMA2
755 config 8260_PCI9_IDMA3
758 config 8260_PCI9_IDMA4
763 source "drivers/pci/pcie/Kconfig"
765 source "drivers/pci/Kconfig"
767 source "drivers/pcmcia/Kconfig"
769 source "drivers/pci/hotplug/Kconfig"
776 bool "RapidIO support"
777 depends on HAS_RAPIDIO || PCI
779 If you say Y here, the kernel will include drivers and
780 infrastructure code to support RapidIO interconnect devices.
783 bool "Freescale Embedded SRIO Controller support"
784 depends on RAPIDIO && HAS_RAPIDIO
787 Include support for RapidIO controller on Freescale embedded
788 processors (MPC8548, MPC8641, etc).
790 source "drivers/rapidio/Kconfig"
794 menu "Advanced setup"
797 config ADVANCED_OPTIONS
798 bool "Prompt for advanced kernel configuration options"
800 This option will enable prompting for a variety of advanced kernel
801 configuration options. These options can cause the kernel to not
802 work if they are set incorrectly, but can be used to optimize certain
803 aspects of kernel memory management.
805 Unless you know what you are doing, say N here.
807 comment "Default settings for advanced configuration options are used"
808 depends on !ADVANCED_OPTIONS
810 config LOWMEM_SIZE_BOOL
811 bool "Set maximum low memory"
812 depends on ADVANCED_OPTIONS
814 This option allows you to set the maximum amount of memory which
815 will be used as "low memory", that is, memory which the kernel can
816 access directly, without having to set up a kernel virtual mapping.
817 This can be useful in optimizing the layout of kernel virtual
820 Say N here unless you know what you are doing.
823 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
826 config LOWMEM_CAM_NUM_BOOL
827 bool "Set number of CAMs to use to map low memory"
828 depends on ADVANCED_OPTIONS && FSL_BOOKE
830 This option allows you to set the maximum number of CAM slots that
831 will be used to map low memory. There are a limited number of slots
832 available and even more limited number that will fit in the L1 MMU.
833 However, using more entries will allow mapping more low memory. This
834 can be useful in optimizing the layout of kernel virtual memory.
836 Say N here unless you know what you are doing.
838 config LOWMEM_CAM_NUM
840 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
844 bool "Build a relocatable kernel (EXPERIMENTAL)"
845 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
847 This builds a kernel image that is capable of running at the
848 location the kernel is loaded at (some alignment restrictions may
851 One use is for the kexec on panic case where the recovery kernel
852 must live at a different physical address than the primary
855 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
856 it has been loaded at and the compile time physical addresses
857 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
858 setting can still be useful to bootwrappers that need to know the
859 load location of the kernel (eg. u-boot/mkimage).
861 config PAGE_OFFSET_BOOL
862 bool "Set custom page offset address"
863 depends on ADVANCED_OPTIONS
865 This option allows you to set the kernel virtual address at which
866 the kernel will map low memory. This can be useful in optimizing
867 the virtual memory layout of the system.
869 Say N here unless you know what you are doing.
872 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
875 config KERNEL_START_BOOL
876 bool "Set custom kernel base address"
877 depends on ADVANCED_OPTIONS
879 This option allows you to set the kernel virtual address at which
880 the kernel will be loaded. Normally this should match PAGE_OFFSET
881 however there are times (like kdump) that one might not want them
884 Say N here unless you know what you are doing.
887 hex "Virtual address of kernel base" if KERNEL_START_BOOL
888 default PAGE_OFFSET if PAGE_OFFSET_BOOL
889 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
892 config PHYSICAL_START_BOOL
893 bool "Set physical address where the kernel is loaded"
894 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
896 This gives the physical address where the kernel is loaded.
898 Say N here unless you know what you are doing.
900 config PHYSICAL_START
901 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
902 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
905 config PHYSICAL_ALIGN
907 default "0x04000000" if FSL_BOOKE
909 This value puts the alignment restrictions on physical address
910 where kernel is loaded and run from. Kernel is compiled for an
911 address which meets above alignment restriction.
913 config TASK_SIZE_BOOL
914 bool "Set custom user task size"
915 depends on ADVANCED_OPTIONS
917 This option allows you to set the amount of virtual address space
918 allocated to user tasks. This can be useful in optimizing the
919 virtual memory layout of the system.
921 Say N here unless you know what you are doing.
924 hex "Size of user task space" if TASK_SIZE_BOOL
925 default "0x80000000" if PPC_PREP || PPC_8xx
928 config CONSISTENT_SIZE_BOOL
929 bool "Set custom consistent memory pool size"
930 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
932 This option allows you to set the size of the
933 consistent memory pool. This pool of virtual memory
934 is used to make consistent memory allocations.
936 config CONSISTENT_SIZE
937 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
938 default "0x00200000" if NOT_COHERENT_CACHE
941 bool "Pinned Kernel TLBs (860 ONLY)"
942 depends on ADVANCED_OPTIONS && 8xx
947 bool "Build a relocatable kernel"
949 This builds a kernel image that is capable of running anywhere
950 in the RMA (real memory area) at any 16k-aligned base address.
951 The kernel is linked as a position-independent executable (PIE)
952 and contains dynamic relocations which are processed early
953 in the bootup process.
955 One use is for the kexec on panic case where the recovery kernel
956 must live at a different physical address than the primary
961 default "0xc000000000000000"
964 default "0xc000000000000000"
965 config PHYSICAL_START
972 source "drivers/Kconfig"
976 source "arch/powerpc/sysdev/qe_lib/Kconfig"
980 source "arch/powerpc/Kconfig.debug"
982 source "security/Kconfig"
986 depends on COMPAT && KEYS
989 source "crypto/Kconfig"
999 source "arch/powerpc/kvm/Kconfig"