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
145 select COMPAT_BINFMT_ELF
147 config SYSVIPC_COMPAT
149 depends on COMPAT && SYSVIPC
152 # All PPC32s use generic nvram driver through ppc_md
157 config SCHED_OMIT_FRAME_POINTER
161 config ARCH_MAY_HAVE_PC_FDC
163 default !PPC_PSERIES || PCI
168 config PPC_UDBG_16550
172 config GENERIC_TBSYNC
174 default y if PPC32 && SMP
186 config SYS_SUPPORTS_APM_EMULATION
187 default y if PMAC_APM_EMU
193 Used to allow a board to specify it wants an ePAPR compliant wrapper.
196 config DEFAULT_UIMAGE
199 Used to allow a board to specify it wants a uImage built by default
205 config ARCH_HIBERNATION_POSSIBLE
209 config ARCH_SUSPEND_POSSIBLE
211 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
212 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
214 config PPC_DCR_NATIVE
224 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
227 config PPC_OF_PLATFORM_PCI
230 depends on PPC64 # not supported on 32 bits yet
233 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
236 config PPC_ADV_DEBUG_REGS
238 depends on 40x || BOOKE
241 config PPC_ADV_DEBUG_IACS
243 depends on PPC_ADV_DEBUG_REGS
247 config PPC_ADV_DEBUG_DACS
249 depends on PPC_ADV_DEBUG_REGS
252 config PPC_ADV_DEBUG_DVCS
254 depends on PPC_ADV_DEBUG_REGS
258 config PPC_ADV_DEBUG_DAC_RANGE
260 depends on PPC_ADV_DEBUG_REGS && 44x
263 source "init/Kconfig"
265 source "kernel/Kconfig.freezer"
267 source "arch/powerpc/sysdev/Kconfig"
268 source "arch/powerpc/platforms/Kconfig"
270 menu "Kernel options"
273 bool "High memory support"
276 source kernel/time/Kconfig
277 source kernel/Kconfig.hz
278 source kernel/Kconfig.preempt
279 source "fs/Kconfig.binfmt"
281 config HUGETLB_PAGE_SIZE_VARIABLE
283 depends on HUGETLB_PAGE
286 config MATH_EMULATION
287 bool "Math emulation"
288 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
290 Some PowerPC chips designed for embedded applications do not have
291 a floating-point unit and therefore do not implement the
292 floating-point instructions in the PowerPC instruction set. If you
293 say Y here, the kernel will include code to emulate a floating-point
294 unit, which will allow programs that use floating-point
297 config 8XX_MINIMAL_FPEMU
298 bool "Minimal math emulation for 8xx"
299 depends on 8xx && !MATH_EMULATION
301 Older arch/ppc kernels still emulated a few floating point
302 instructions such as load and store, even when full math
303 emulation is disabled. Say "Y" here if you want to preserve
306 It is recommended that you build a soft-float userspace instead.
312 bool "SWIOTLB support"
316 Support for IO bounce buffering for systems without an IOMMU.
317 This allows us to DMA to the full physical address space on
318 platforms where the size of a physical address is larger
319 than the bus address. Not all platforms support this.
322 bool "Support for enabling/disabling CPUs"
323 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
325 Say Y here to be able to disable and re-enable individual
326 CPUs at runtime on SMP machines.
328 Say N if you are unsure.
330 config ARCH_CPU_PROBE_RELEASE
332 depends on HOTPLUG_CPU
334 config ARCH_ENABLE_MEMORY_HOTPLUG
337 config ARCH_HAS_WALK_MEMORY
340 config ARCH_ENABLE_MEMORY_HOTREMOVE
344 bool "kexec system call (EXPERIMENTAL)"
345 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
347 kexec is a system call that implements the ability to shutdown your
348 current kernel, and to start another kernel. It is like a reboot
349 but it is independent of the system firmware. And like a reboot
350 you can start any kernel with it, not just Linux.
352 The name comes from the similarity to the exec system call.
354 It is an ongoing process to be certain the hardware in a machine
355 is properly shutdown, so do not be surprised if this code does not
356 initially work for you. It may help to enable device hotplugging
357 support. As of this writing the exact hardware interface is
358 strongly in flux, so no good recommendation can be made.
361 bool "Build a kdump crash kernel"
362 depends on PPC64 || 6xx || FSL_BOOKE
363 select RELOCATABLE if PPC64 || FSL_BOOKE
365 Build a kernel suitable for use as a kdump capture kernel.
366 The same kernel binary can be used as production kernel and dump
370 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
371 depends on PPC_PSERIES && EXPERIMENTAL
373 Hypervisor-assisted dump is meant to be a kdump replacement
374 offering robustness and speed not possible without system
375 hypervisor assistance.
380 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
381 default y if PPC_PREP
384 bool "Distribute interrupts on all CPUs by default"
385 depends on SMP && !MV64360
387 This option gives the kernel permission to distribute IRQs across
388 multiple CPUs. Saying N here will route all IRQs to the first
389 CPU. Generally saying Y is safe, although some problems have been
390 reported with SMP Power Macintoshes with this option enabled.
395 default y if SMP && PPC_PSERIES
401 depends on NEED_MULTIPLE_NODES
403 config MAX_ACTIVE_REGIONS
405 default "256" if PPC64
408 config ARCH_SELECT_MEMORY_MODEL
412 config ARCH_FLATMEM_ENABLE
414 depends on (PPC64 && !NUMA) || PPC32
416 config ARCH_SPARSEMEM_ENABLE
419 select SPARSEMEM_VMEMMAP_ENABLE
421 config ARCH_SPARSEMEM_DEFAULT
423 depends on (SMP && PPC_PSERIES) || PPC_PS3
425 config ARCH_POPULATES_NODE_MAP
428 config SYS_SUPPORTS_HUGETLBFS
430 depends on PPC_BOOK3S_64
434 config ARCH_MEMORY_PROBE
436 depends on MEMORY_HOTPLUG
438 # Some NUMA nodes have memory ranges that span
439 # other nodes. Even though a pfn is valid and
440 # between a node's start and end pfns, it may not
441 # reside on that node. See memmap_init_zone()
443 config NODES_SPAN_OTHER_NODES
445 depends on NEED_MULTIPLE_NODES
447 config PPC_HAS_HASH_64K
453 bool "Using standard binutils settings"
457 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
458 Note, that kernel will be able to run only those applications,
459 which had been compiled using binutils later than 2.17.50.0.3 with
460 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
461 the older binutils, you can patch them with a trivial patch, which
462 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
468 Select the kernel logical page size. Increasing the page size
469 will reduce software overhead at each page boundary, allow
470 hardware prefetch mechanisms to be more effective, and allow
471 larger dma transfers increasing IO efficiency and reducing
472 overhead. However the utilization of memory will increase.
473 For example, each cached file will using a multiple of the
474 page size to hold its contents and the difference between the
475 end of file and the end of page is wasted.
477 Some dedicated systems, such as software raid serving with
478 accelerated calculations, have shown significant increases.
480 If you configure a 64 bit kernel for 64k pages but the
481 processor does not support them, then the kernel will simulate
482 them with 4k pages, loading them on demand, but with the
483 reduced software overhead and larger internal fragmentation.
484 For the 32 bit kernel, a large page option will not be offered
485 unless it is supported by the configured processor.
487 If unsure, choose 4K_PAGES.
493 bool "16k page size" if 44x
496 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
497 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
499 config PPC_256K_PAGES
500 bool "256k page size" if 44x
501 depends on !STDBINUTILS
503 Make the page size 256k.
505 As the ELF standard only requires alignment to support page
506 sizes up to 64k, you will need to compile all of your user
507 space applications with a non-standard binutils settings
508 (see the STDBINUTILS description for details).
510 Say N unless you know what you are doing.
514 config FORCE_MAX_ZONEORDER
515 int "Maximum zone order"
516 range 9 64 if PPC64 && PPC_64K_PAGES
517 default "9" if PPC64 && PPC_64K_PAGES
518 range 13 64 if PPC64 && !PPC_64K_PAGES
519 default "13" if PPC64 && !PPC_64K_PAGES
520 range 9 64 if PPC32 && PPC_16K_PAGES
521 default "9" if PPC32 && PPC_16K_PAGES
522 range 7 64 if PPC32 && PPC_64K_PAGES
523 default "7" if PPC32 && PPC_64K_PAGES
524 range 5 64 if PPC32 && PPC_256K_PAGES
525 default "5" if PPC32 && PPC_256K_PAGES
529 The kernel memory allocator divides physically contiguous memory
530 blocks into "zones", where each zone is a power of two number of
531 pages. This option selects the largest power of two that the kernel
532 keeps in the memory allocator. If you need to allocate very large
533 blocks of physically contiguous memory, then you may need to
536 This config option is actually maximum order plus one. For example,
537 a value of 11 means that the largest free memory block is 2^10 pages.
539 The page size is not necessarily 4KB. For example, on 64-bit
540 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
541 this in mind when choosing a value for this option.
543 config PPC_SUBPAGE_PROT
544 bool "Support setting protections for 4k subpages"
545 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
547 This option adds support for a system call to allow user programs
548 to set access permissions (read/write, readonly, or no access)
549 on the 4k subpages of each 64k page.
552 bool "SMT (Hyperthreading) scheduler support"
553 depends on PPC64 && SMP
555 SMT scheduler support improves the CPU scheduler's decision making
556 when dealing with POWER5 cpus at a cost of slightly increased
557 overhead in some places. If unsure say N here.
560 bool "Default bootloader kernel arguments"
563 string "Initial kernel command string"
564 depends on CMDLINE_BOOL
565 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
567 On some platforms, there is currently no way for the boot loader to
568 pass arguments to the kernel. For these platforms, you can supply
569 some command-line options at build time by entering them here. In
570 most cases you will need to specify the root device here.
573 string "Additional default image types"
575 List additional targets to be built by the bootwrapper here (separated
576 by spaces). This is useful for targets that depend of device tree
577 files in the .dts directory.
579 Targets in this list will be build as part of the default build
580 target, or when the user does a 'make zImage' or a
581 'make zImage.initrd'.
583 If unsure, leave blank
585 config ARCH_WANTS_FREEZER_CONTROL
589 source kernel/power/Kconfig
592 bool "Enable seccomp to safely compute untrusted bytecode"
596 This kernel feature is useful for number crunching applications
597 that may need to compute untrusted bytecode during their
598 execution. By using pipes or other transports made available to
599 the process as file descriptors supporting the read/write
600 syscalls, it's possible to isolate those applications in
601 their own address space using seccomp. Once seccomp is
602 enabled via /proc/<pid>/seccomp, it cannot be disabled
603 and the task is only allowed to execute a few safe syscalls
604 defined by each seccomp mode.
606 If unsure, say Y. Only embedded should say N here.
612 default !PPC_ISERIES || PCI
617 bool "Support for ISA-bus hardware"
618 depends on PPC_PREP || PPC_CHRP
621 Find out whether you have ISA slots on your motherboard. ISA is the
622 name of a bus system, i.e. the way the CPU talks to the other stuff
623 inside your box. If you have an Apple machine, say N here; if you
624 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
625 you have an embedded board, consult your board documentation.
631 config NEED_DMA_MAP_STATE
632 def_bool (PPC64 || NOT_COHERENT_CACHE)
634 config NEED_SG_DMA_LENGTH
637 config GENERIC_ISA_DMA
639 depends on ISA_DMA_API
642 config PPC_INDIRECT_PCI
645 default y if 40x || 44x
659 select PPC_INDIRECT_PCI
665 depends on SUSPEND && (PPC_85xx || PPC_86xx)
667 Freescale MPC85xx/MPC86xx power management controller support
668 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
673 depends on SUSPEND && (44x || 40x)
675 PPC4xx Clock Power Management (CPM) support (suspend/resume).
676 It also enables support for two different idle states (idle-wait
683 bool "Freescale Local Bus support"
686 Enables reporting of errors from the Freescale local bus
687 controller. Also contains some common code used by
688 drivers for specific local bus peripherals.
692 depends on PPC_83xx || QUICC_ENGINE || CPM2
694 Freescale General-purpose Timers support
696 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
700 # Platforms that what PCI turned unconditionally just do select PCI
701 # in their config node. Platforms that want to choose at config
702 # time should select PPC_PCI_CHOICE
703 config PPC_PCI_CHOICE
707 bool "PCI support" if PPC_PCI_CHOICE
708 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
709 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
710 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
711 default PCI_QSPAN if !4xx && !CPM2 && 8xx
712 select ARCH_SUPPORTS_MSI
714 Find out whether your system includes a PCI bus. PCI is the name of
715 a bus system, i.e. the way the CPU talks to the other stuff inside
716 your box. If you say Y here, the kernel will include drivers and
717 infrastructure code to support PCI bus devices.
727 depends on !4xx && !CPM2 && 8xx
730 Say Y here if you have a system based on a Motorola 8xx-series
731 embedded processor with a QSPAN PCI interface, otherwise say N.
735 depends on PCI && 8260
736 select PPC_INDIRECT_PCI
740 bool "Enable workaround for MPC826x erratum PCI 9"
741 depends on PCI_8260 && !8272
745 prompt "IDMA channel for PCI 9 workaround"
748 config 8260_PCI9_IDMA1
751 config 8260_PCI9_IDMA2
754 config 8260_PCI9_IDMA3
757 config 8260_PCI9_IDMA4
762 source "drivers/pci/pcie/Kconfig"
764 source "drivers/pci/Kconfig"
766 source "drivers/pcmcia/Kconfig"
768 source "drivers/pci/hotplug/Kconfig"
775 bool "RapidIO support"
776 depends on HAS_RAPIDIO || PCI
778 If you say Y here, the kernel will include drivers and
779 infrastructure code to support RapidIO interconnect devices.
782 bool "Freescale Embedded SRIO Controller support"
783 depends on RAPIDIO && HAS_RAPIDIO
786 Include support for RapidIO controller on Freescale embedded
787 processors (MPC8548, MPC8641, etc).
789 source "drivers/rapidio/Kconfig"
793 menu "Advanced setup"
796 config ADVANCED_OPTIONS
797 bool "Prompt for advanced kernel configuration options"
799 This option will enable prompting for a variety of advanced kernel
800 configuration options. These options can cause the kernel to not
801 work if they are set incorrectly, but can be used to optimize certain
802 aspects of kernel memory management.
804 Unless you know what you are doing, say N here.
806 comment "Default settings for advanced configuration options are used"
807 depends on !ADVANCED_OPTIONS
809 config LOWMEM_SIZE_BOOL
810 bool "Set maximum low memory"
811 depends on ADVANCED_OPTIONS
813 This option allows you to set the maximum amount of memory which
814 will be used as "low memory", that is, memory which the kernel can
815 access directly, without having to set up a kernel virtual mapping.
816 This can be useful in optimizing the layout of kernel virtual
819 Say N here unless you know what you are doing.
822 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
825 config LOWMEM_CAM_NUM_BOOL
826 bool "Set number of CAMs to use to map low memory"
827 depends on ADVANCED_OPTIONS && FSL_BOOKE
829 This option allows you to set the maximum number of CAM slots that
830 will be used to map low memory. There are a limited number of slots
831 available and even more limited number that will fit in the L1 MMU.
832 However, using more entries will allow mapping more low memory. This
833 can be useful in optimizing the layout of kernel virtual memory.
835 Say N here unless you know what you are doing.
837 config LOWMEM_CAM_NUM
839 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
843 bool "Build a relocatable kernel (EXPERIMENTAL)"
844 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
846 This builds a kernel image that is capable of running at the
847 location the kernel is loaded at (some alignment restrictions may
850 One use is for the kexec on panic case where the recovery kernel
851 must live at a different physical address than the primary
854 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
855 it has been loaded at and the compile time physical addresses
856 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
857 setting can still be useful to bootwrappers that need to know the
858 load location of the kernel (eg. u-boot/mkimage).
860 config PAGE_OFFSET_BOOL
861 bool "Set custom page offset address"
862 depends on ADVANCED_OPTIONS
864 This option allows you to set the kernel virtual address at which
865 the kernel will map low memory. This can be useful in optimizing
866 the virtual memory layout of the system.
868 Say N here unless you know what you are doing.
871 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
874 config KERNEL_START_BOOL
875 bool "Set custom kernel base address"
876 depends on ADVANCED_OPTIONS
878 This option allows you to set the kernel virtual address at which
879 the kernel will be loaded. Normally this should match PAGE_OFFSET
880 however there are times (like kdump) that one might not want them
883 Say N here unless you know what you are doing.
886 hex "Virtual address of kernel base" if KERNEL_START_BOOL
887 default PAGE_OFFSET if PAGE_OFFSET_BOOL
888 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
891 config PHYSICAL_START_BOOL
892 bool "Set physical address where the kernel is loaded"
893 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
895 This gives the physical address where the kernel is loaded.
897 Say N here unless you know what you are doing.
899 config PHYSICAL_START
900 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
901 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
904 config PHYSICAL_ALIGN
906 default "0x04000000" if FSL_BOOKE
908 This value puts the alignment restrictions on physical address
909 where kernel is loaded and run from. Kernel is compiled for an
910 address which meets above alignment restriction.
912 config TASK_SIZE_BOOL
913 bool "Set custom user task size"
914 depends on ADVANCED_OPTIONS
916 This option allows you to set the amount of virtual address space
917 allocated to user tasks. This can be useful in optimizing the
918 virtual memory layout of the system.
920 Say N here unless you know what you are doing.
923 hex "Size of user task space" if TASK_SIZE_BOOL
924 default "0x80000000" if PPC_PREP || PPC_8xx
927 config CONSISTENT_SIZE_BOOL
928 bool "Set custom consistent memory pool size"
929 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
931 This option allows you to set the size of the
932 consistent memory pool. This pool of virtual memory
933 is used to make consistent memory allocations.
935 config CONSISTENT_SIZE
936 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
937 default "0x00200000" if NOT_COHERENT_CACHE
940 bool "Pinned Kernel TLBs (860 ONLY)"
941 depends on ADVANCED_OPTIONS && 8xx
946 bool "Build a relocatable kernel"
948 This builds a kernel image that is capable of running anywhere
949 in the RMA (real memory area) at any 16k-aligned base address.
950 The kernel is linked as a position-independent executable (PIE)
951 and contains dynamic relocations which are processed early
952 in the bootup process.
954 One use is for the kexec on panic case where the recovery kernel
955 must live at a different physical address than the primary
960 default "0xc000000000000000"
963 default "0xc000000000000000"
964 config PHYSICAL_START
971 source "drivers/Kconfig"
975 source "arch/powerpc/sysdev/qe_lib/Kconfig"
979 source "arch/powerpc/Kconfig.debug"
981 source "security/Kconfig"
985 depends on COMPAT && KEYS
988 source "crypto/Kconfig"
998 source "arch/powerpc/kvm/Kconfig"