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 HAVE_SETUP_PER_CPU_AREA
46 config NEED_PER_CPU_EMBED_FIRST_CHUNK
54 int "Number of virtual interrupt numbers"
58 This defines the number of virtual interrupt numbers the kernel
59 can manage. Virtual interrupt numbers are what you see in
60 /proc/interrupts. If you configure your system to have too few,
61 drivers will fail to load or worse - handle with care.
63 config STACKTRACE_SUPPORT
67 config HAVE_LATENCYTOP_SUPPORT
70 config TRACE_IRQFLAGS_SUPPORT
74 config LOCKDEP_SUPPORT
78 config RWSEM_GENERIC_SPINLOCK
81 config RWSEM_XCHGADD_ALGORITHM
85 config GENERIC_LOCKBREAK
88 depends on SMP && PREEMPT
90 config ARCH_HAS_ILOG2_U32
94 config ARCH_HAS_ILOG2_U64
98 config GENERIC_HWEIGHT
102 config GENERIC_FIND_NEXT_BIT
109 Generic GPIO API support
111 config ARCH_NO_VIRT_TO_BUS
118 select OF_EARLY_FLATTREE
119 select HAVE_FTRACE_MCOUNT_RECORD
120 select HAVE_DYNAMIC_FTRACE
121 select HAVE_FUNCTION_TRACER
122 select HAVE_FUNCTION_GRAPH_TRACER
123 select ARCH_WANT_OPTIONAL_GPIOLIB
125 select HAVE_IOREMAP_PROT
126 select HAVE_EFFICIENT_UNALIGNED_ACCESS
128 select HAVE_ARCH_KGDB
129 select HAVE_KRETPROBES
130 select HAVE_ARCH_TRACEHOOK
132 select HAVE_DMA_ATTRS
133 select HAVE_DMA_API_DEBUG
134 select USE_GENERIC_SMP_HELPERS if SMP
136 select HAVE_SYSCALL_WRAPPERS if PPC64
137 select GENERIC_ATOMIC64 if PPC32
139 select HAVE_PERF_EVENTS
140 select HAVE_REGS_AND_STACK_ACCESS_API
141 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
150 select COMPAT_BINFMT_ELF
152 config SYSVIPC_COMPAT
154 depends on COMPAT && SYSVIPC
157 # All PPC32s use generic nvram driver through ppc_md
162 config SCHED_OMIT_FRAME_POINTER
166 config ARCH_MAY_HAVE_PC_FDC
168 default !PPC_PSERIES || PCI
173 config PPC_UDBG_16550
177 config GENERIC_TBSYNC
179 default y if PPC32 && SMP
191 config SYS_SUPPORTS_APM_EMULATION
192 default y if PMAC_APM_EMU
195 config DEFAULT_UIMAGE
198 Used to allow a board to specify it wants a uImage built by default
204 config ARCH_HIBERNATION_POSSIBLE
208 config ARCH_SUSPEND_POSSIBLE
210 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
211 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
213 config PPC_DCR_NATIVE
223 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
226 config PPC_OF_PLATFORM_PCI
229 depends on PPC64 # not supported on 32 bits yet
232 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
235 config PPC_ADV_DEBUG_REGS
237 depends on 40x || BOOKE
240 config PPC_ADV_DEBUG_IACS
242 depends on PPC_ADV_DEBUG_REGS
246 config PPC_ADV_DEBUG_DACS
248 depends on PPC_ADV_DEBUG_REGS
251 config PPC_ADV_DEBUG_DVCS
253 depends on PPC_ADV_DEBUG_REGS
257 config PPC_ADV_DEBUG_DAC_RANGE
259 depends on PPC_ADV_DEBUG_REGS && 44x
262 source "init/Kconfig"
264 source "kernel/Kconfig.freezer"
266 source "arch/powerpc/sysdev/Kconfig"
267 source "arch/powerpc/platforms/Kconfig"
269 menu "Kernel options"
272 bool "High memory support"
275 source kernel/time/Kconfig
276 source kernel/Kconfig.hz
277 source kernel/Kconfig.preempt
278 source "fs/Kconfig.binfmt"
280 config HUGETLB_PAGE_SIZE_VARIABLE
282 depends on HUGETLB_PAGE
285 config MATH_EMULATION
286 bool "Math emulation"
287 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
289 Some PowerPC chips designed for embedded applications do not have
290 a floating-point unit and therefore do not implement the
291 floating-point instructions in the PowerPC instruction set. If you
292 say Y here, the kernel will include code to emulate a floating-point
293 unit, which will allow programs that use floating-point
296 config 8XX_MINIMAL_FPEMU
297 bool "Minimal math emulation for 8xx"
298 depends on 8xx && !MATH_EMULATION
300 Older arch/ppc kernels still emulated a few floating point
301 instructions such as load and store, even when full math
302 emulation is disabled. Say "Y" here if you want to preserve
305 It is recommended that you build a soft-float userspace instead.
311 bool "SWIOTLB support"
315 Support for IO bounce buffering for systems without an IOMMU.
316 This allows us to DMA to the full physical address space on
317 platforms where the size of a physical address is larger
318 than the bus address. Not all platforms support this.
321 bool "Support for enabling/disabling CPUs"
322 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
324 Say Y here to be able to disable and re-enable individual
325 CPUs at runtime on SMP machines.
327 Say N if you are unsure.
329 config ARCH_CPU_PROBE_RELEASE
331 depends on HOTPLUG_CPU
333 config ARCH_ENABLE_MEMORY_HOTPLUG
336 config ARCH_HAS_WALK_MEMORY
339 config ARCH_ENABLE_MEMORY_HOTREMOVE
343 bool "kexec system call (EXPERIMENTAL)"
344 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
346 kexec is a system call that implements the ability to shutdown your
347 current kernel, and to start another kernel. It is like a reboot
348 but it is independent of the system firmware. And like a reboot
349 you can start any kernel with it, not just Linux.
351 The name comes from the similarity to the exec system call.
353 It is an ongoing process to be certain the hardware in a machine
354 is properly shutdown, so do not be surprised if this code does not
355 initially work for you. It may help to enable device hotplugging
356 support. As of this writing the exact hardware interface is
357 strongly in flux, so no good recommendation can be made.
360 bool "Build a kdump crash kernel"
361 depends on PPC64 || 6xx || FSL_BOOKE
362 select RELOCATABLE if PPC64 || FSL_BOOKE
364 Build a kernel suitable for use as a kdump capture kernel.
365 The same kernel binary can be used as production kernel and dump
369 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
370 depends on PPC_PSERIES && EXPERIMENTAL
372 Hypervisor-assisted dump is meant to be a kdump replacement
373 offering robustness and speed not possible without system
374 hypervisor assistance.
379 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
380 default y if PPC_PREP
383 bool "Distribute interrupts on all CPUs by default"
384 depends on SMP && !MV64360
386 This option gives the kernel permission to distribute IRQs across
387 multiple CPUs. Saying N here will route all IRQs to the first
388 CPU. Generally saying Y is safe, although some problems have been
389 reported with SMP Power Macintoshes with this option enabled.
392 bool "Support sparse irq numbering"
395 This enables support for sparse irqs. This is useful for distro
396 kernels that want to define a high CONFIG_NR_CPUS value but still
397 want to have low kernel memory footprint on smaller machines.
399 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
400 out the irq_desc[] array in a more NUMA-friendly way. )
402 If you don't know what to do here, say N.
407 default y if SMP && PPC_PSERIES
413 depends on NEED_MULTIPLE_NODES
415 config MAX_ACTIVE_REGIONS
417 default "256" if PPC64
420 config ARCH_SELECT_MEMORY_MODEL
424 config ARCH_FLATMEM_ENABLE
426 depends on (PPC64 && !NUMA) || PPC32
428 config ARCH_SPARSEMEM_ENABLE
431 select SPARSEMEM_VMEMMAP_ENABLE
433 config ARCH_SPARSEMEM_DEFAULT
435 depends on (SMP && PPC_PSERIES) || PPC_PS3
437 config ARCH_POPULATES_NODE_MAP
440 config SYS_SUPPORTS_HUGETLBFS
442 depends on PPC_BOOK3S_64
446 config ARCH_MEMORY_PROBE
448 depends on MEMORY_HOTPLUG
450 # Some NUMA nodes have memory ranges that span
451 # other nodes. Even though a pfn is valid and
452 # between a node's start and end pfns, it may not
453 # reside on that node. See memmap_init_zone()
455 config NODES_SPAN_OTHER_NODES
457 depends on NEED_MULTIPLE_NODES
459 config PPC_HAS_HASH_64K
465 bool "Using standard binutils settings"
469 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
470 Note, that kernel will be able to run only those applications,
471 which had been compiled using binutils later than 2.17.50.0.3 with
472 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
473 the older binutils, you can patch them with a trivial patch, which
474 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
480 Select the kernel logical page size. Increasing the page size
481 will reduce software overhead at each page boundary, allow
482 hardware prefetch mechanisms to be more effective, and allow
483 larger dma transfers increasing IO efficiency and reducing
484 overhead. However the utilization of memory will increase.
485 For example, each cached file will using a multiple of the
486 page size to hold its contents and the difference between the
487 end of file and the end of page is wasted.
489 Some dedicated systems, such as software raid serving with
490 accelerated calculations, have shown significant increases.
492 If you configure a 64 bit kernel for 64k pages but the
493 processor does not support them, then the kernel will simulate
494 them with 4k pages, loading them on demand, but with the
495 reduced software overhead and larger internal fragmentation.
496 For the 32 bit kernel, a large page option will not be offered
497 unless it is supported by the configured processor.
499 If unsure, choose 4K_PAGES.
505 bool "16k page size" if 44x
508 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
509 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
511 config PPC_256K_PAGES
512 bool "256k page size" if 44x
513 depends on !STDBINUTILS
515 Make the page size 256k.
517 As the ELF standard only requires alignment to support page
518 sizes up to 64k, you will need to compile all of your user
519 space applications with a non-standard binutils settings
520 (see the STDBINUTILS description for details).
522 Say N unless you know what you are doing.
526 config FORCE_MAX_ZONEORDER
527 int "Maximum zone order"
528 range 9 64 if PPC64 && PPC_64K_PAGES
529 default "9" if PPC64 && PPC_64K_PAGES
530 range 13 64 if PPC64 && !PPC_64K_PAGES
531 default "13" if PPC64 && !PPC_64K_PAGES
532 range 9 64 if PPC32 && PPC_16K_PAGES
533 default "9" if PPC32 && PPC_16K_PAGES
534 range 7 64 if PPC32 && PPC_64K_PAGES
535 default "7" if PPC32 && PPC_64K_PAGES
536 range 5 64 if PPC32 && PPC_256K_PAGES
537 default "5" if PPC32 && PPC_256K_PAGES
541 The kernel memory allocator divides physically contiguous memory
542 blocks into "zones", where each zone is a power of two number of
543 pages. This option selects the largest power of two that the kernel
544 keeps in the memory allocator. If you need to allocate very large
545 blocks of physically contiguous memory, then you may need to
548 This config option is actually maximum order plus one. For example,
549 a value of 11 means that the largest free memory block is 2^10 pages.
551 The page size is not necessarily 4KB. For example, on 64-bit
552 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
553 this in mind when choosing a value for this option.
555 config PPC_SUBPAGE_PROT
556 bool "Support setting protections for 4k subpages"
557 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
559 This option adds support for a system call to allow user programs
560 to set access permissions (read/write, readonly, or no access)
561 on the 4k subpages of each 64k page.
564 bool "SMT (Hyperthreading) scheduler support"
565 depends on PPC64 && SMP
567 SMT scheduler support improves the CPU scheduler's decision making
568 when dealing with POWER5 cpus at a cost of slightly increased
569 overhead in some places. If unsure say N here.
572 bool "Default bootloader kernel arguments"
575 string "Initial kernel command string"
576 depends on CMDLINE_BOOL
577 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
579 On some platforms, there is currently no way for the boot loader to
580 pass arguments to the kernel. For these platforms, you can supply
581 some command-line options at build time by entering them here. In
582 most cases you will need to specify the root device here.
585 string "Additional default image types"
587 List additional targets to be built by the bootwrapper here (separated
588 by spaces). This is useful for targets that depend of device tree
589 files in the .dts directory.
591 Targets in this list will be build as part of the default build
592 target, or when the user does a 'make zImage' or a
593 'make zImage.initrd'.
595 If unsure, leave blank
597 config ARCH_WANTS_FREEZER_CONTROL
601 source kernel/power/Kconfig
604 bool "Enable seccomp to safely compute untrusted bytecode"
608 This kernel feature is useful for number crunching applications
609 that may need to compute untrusted bytecode during their
610 execution. By using pipes or other transports made available to
611 the process as file descriptors supporting the read/write
612 syscalls, it's possible to isolate those applications in
613 their own address space using seccomp. Once seccomp is
614 enabled via /proc/<pid>/seccomp, it cannot be disabled
615 and the task is only allowed to execute a few safe syscalls
616 defined by each seccomp mode.
618 If unsure, say Y. Only embedded should say N here.
624 default !PPC_ISERIES || PCI
629 bool "Support for ISA-bus hardware"
630 depends on PPC_PREP || PPC_CHRP
633 Find out whether you have ISA slots on your motherboard. ISA is the
634 name of a bus system, i.e. the way the CPU talks to the other stuff
635 inside your box. If you have an Apple machine, say N here; if you
636 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
637 you have an embedded board, consult your board documentation.
643 config NEED_DMA_MAP_STATE
644 def_bool (PPC64 || NOT_COHERENT_CACHE)
646 config NEED_SG_DMA_LENGTH
649 config GENERIC_ISA_DMA
651 depends on ISA_DMA_API
654 config PPC_INDIRECT_PCI
657 default y if 40x || 44x
671 select PPC_INDIRECT_PCI
677 depends on SUSPEND && (PPC_85xx || PPC_86xx)
679 Freescale MPC85xx/MPC86xx power management controller support
680 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
685 depends on SUSPEND && (44x || 40x)
687 PPC4xx Clock Power Management (CPM) support (suspend/resume).
688 It also enables support for two different idle states (idle-wait
695 bool "Freescale Local Bus support"
698 Enables reporting of errors from the Freescale local bus
699 controller. Also contains some common code used by
700 drivers for specific local bus peripherals.
704 depends on PPC_83xx || QUICC_ENGINE || CPM2
706 Freescale General-purpose Timers support
708 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
712 # Platforms that what PCI turned unconditionally just do select PCI
713 # in their config node. Platforms that want to choose at config
714 # time should select PPC_PCI_CHOICE
715 config PPC_PCI_CHOICE
719 bool "PCI support" if PPC_PCI_CHOICE
720 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
721 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
722 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
723 default PCI_QSPAN if !4xx && !CPM2 && 8xx
724 select ARCH_SUPPORTS_MSI
726 Find out whether your system includes a PCI bus. PCI is the name of
727 a bus system, i.e. the way the CPU talks to the other stuff inside
728 your box. If you say Y here, the kernel will include drivers and
729 infrastructure code to support PCI bus devices.
739 depends on !4xx && !CPM2 && 8xx
742 Say Y here if you have a system based on a Motorola 8xx-series
743 embedded processor with a QSPAN PCI interface, otherwise say N.
747 depends on PCI && 8260
748 select PPC_INDIRECT_PCI
752 bool "Enable workaround for MPC826x erratum PCI 9"
753 depends on PCI_8260 && !8272
757 prompt "IDMA channel for PCI 9 workaround"
760 config 8260_PCI9_IDMA1
763 config 8260_PCI9_IDMA2
766 config 8260_PCI9_IDMA3
769 config 8260_PCI9_IDMA4
774 source "drivers/pci/pcie/Kconfig"
776 source "drivers/pci/Kconfig"
778 source "drivers/pcmcia/Kconfig"
780 source "drivers/pci/hotplug/Kconfig"
787 bool "RapidIO support"
788 depends on HAS_RAPIDIO
790 If you say Y here, the kernel will include drivers and
791 infrastructure code to support RapidIO interconnect devices.
793 source "drivers/rapidio/Kconfig"
797 menu "Advanced setup"
800 config ADVANCED_OPTIONS
801 bool "Prompt for advanced kernel configuration options"
803 This option will enable prompting for a variety of advanced kernel
804 configuration options. These options can cause the kernel to not
805 work if they are set incorrectly, but can be used to optimize certain
806 aspects of kernel memory management.
808 Unless you know what you are doing, say N here.
810 comment "Default settings for advanced configuration options are used"
811 depends on !ADVANCED_OPTIONS
813 config LOWMEM_SIZE_BOOL
814 bool "Set maximum low memory"
815 depends on ADVANCED_OPTIONS
817 This option allows you to set the maximum amount of memory which
818 will be used as "low memory", that is, memory which the kernel can
819 access directly, without having to set up a kernel virtual mapping.
820 This can be useful in optimizing the layout of kernel virtual
823 Say N here unless you know what you are doing.
826 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
829 config LOWMEM_CAM_NUM_BOOL
830 bool "Set number of CAMs to use to map low memory"
831 depends on ADVANCED_OPTIONS && FSL_BOOKE
833 This option allows you to set the maximum number of CAM slots that
834 will be used to map low memory. There are a limited number of slots
835 available and even more limited number that will fit in the L1 MMU.
836 However, using more entries will allow mapping more low memory. This
837 can be useful in optimizing the layout of kernel virtual memory.
839 Say N here unless you know what you are doing.
841 config LOWMEM_CAM_NUM
843 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
847 bool "Build a relocatable kernel (EXPERIMENTAL)"
848 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
850 This builds a kernel image that is capable of running at the
851 location the kernel is loaded at (some alignment restrictions may
854 One use is for the kexec on panic case where the recovery kernel
855 must live at a different physical address than the primary
858 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
859 it has been loaded at and the compile time physical addresses
860 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
861 setting can still be useful to bootwrappers that need to know the
862 load location of the kernel (eg. u-boot/mkimage).
864 config PAGE_OFFSET_BOOL
865 bool "Set custom page offset address"
866 depends on ADVANCED_OPTIONS
868 This option allows you to set the kernel virtual address at which
869 the kernel will map low memory. This can be useful in optimizing
870 the virtual memory layout of the system.
872 Say N here unless you know what you are doing.
875 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
878 config KERNEL_START_BOOL
879 bool "Set custom kernel base address"
880 depends on ADVANCED_OPTIONS
882 This option allows you to set the kernel virtual address at which
883 the kernel will be loaded. Normally this should match PAGE_OFFSET
884 however there are times (like kdump) that one might not want them
887 Say N here unless you know what you are doing.
890 hex "Virtual address of kernel base" if KERNEL_START_BOOL
891 default PAGE_OFFSET if PAGE_OFFSET_BOOL
892 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
895 config PHYSICAL_START_BOOL
896 bool "Set physical address where the kernel is loaded"
897 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
899 This gives the physical address where the kernel is loaded.
901 Say N here unless you know what you are doing.
903 config PHYSICAL_START
904 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
905 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
908 config PHYSICAL_ALIGN
910 default "0x04000000" if FSL_BOOKE
912 This value puts the alignment restrictions on physical address
913 where kernel is loaded and run from. Kernel is compiled for an
914 address which meets above alignment restriction.
916 config TASK_SIZE_BOOL
917 bool "Set custom user task size"
918 depends on ADVANCED_OPTIONS
920 This option allows you to set the amount of virtual address space
921 allocated to user tasks. This can be useful in optimizing the
922 virtual memory layout of the system.
924 Say N here unless you know what you are doing.
927 hex "Size of user task space" if TASK_SIZE_BOOL
928 default "0x80000000" if PPC_PREP || PPC_8xx
931 config CONSISTENT_SIZE_BOOL
932 bool "Set custom consistent memory pool size"
933 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
935 This option allows you to set the size of the
936 consistent memory pool. This pool of virtual memory
937 is used to make consistent memory allocations.
939 config CONSISTENT_SIZE
940 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
941 default "0x00200000" if NOT_COHERENT_CACHE
944 bool "Pinned Kernel TLBs (860 ONLY)"
945 depends on ADVANCED_OPTIONS && 8xx
950 bool "Build a relocatable kernel"
952 This builds a kernel image that is capable of running anywhere
953 in the RMA (real memory area) at any 16k-aligned base address.
954 The kernel is linked as a position-independent executable (PIE)
955 and contains dynamic relocations which are processed early
956 in the bootup process.
958 One use is for the kexec on panic case where the recovery kernel
959 must live at a different physical address than the primary
964 default "0xc000000000000000"
967 default "0xc000000000000000"
968 config PHYSICAL_START
975 source "drivers/Kconfig"
979 source "arch/powerpc/sysdev/qe_lib/Kconfig"
983 source "arch/powerpc/Kconfig.debug"
985 source "security/Kconfig"
989 depends on COMPAT && KEYS
992 source "crypto/Kconfig"
1002 source "arch/powerpc/kvm/Kconfig"