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)
138 select HAVE_ARCH_JUMP_LABEL
139 select ARCH_HAVE_NMI_SAFE_CMPXCHG
148 select COMPAT_BINFMT_ELF
150 config SYSVIPC_COMPAT
152 depends on COMPAT && SYSVIPC
155 # All PPC32s use generic nvram driver through ppc_md
160 config SCHED_OMIT_FRAME_POINTER
164 config ARCH_MAY_HAVE_PC_FDC
166 default !PPC_PSERIES || PCI
171 config PPC_UDBG_16550
175 config GENERIC_TBSYNC
177 default y if PPC32 && SMP
189 config SYS_SUPPORTS_APM_EMULATION
190 default y if PMAC_APM_EMU
196 Used to allow a board to specify it wants an ePAPR compliant wrapper.
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 && !SMP) || 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 || (44x && !SMP && !47x)) && 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.
398 default y if SMP && PPC_PSERIES
404 depends on NEED_MULTIPLE_NODES
406 config MAX_ACTIVE_REGIONS
408 default "256" if PPC64
411 config ARCH_SELECT_MEMORY_MODEL
415 config ARCH_FLATMEM_ENABLE
417 depends on (PPC64 && !NUMA) || PPC32
419 config ARCH_SPARSEMEM_ENABLE
422 select SPARSEMEM_VMEMMAP_ENABLE
424 config ARCH_SPARSEMEM_DEFAULT
426 depends on (SMP && PPC_PSERIES) || PPC_PS3
428 config ARCH_POPULATES_NODE_MAP
431 config SYS_SUPPORTS_HUGETLBFS
433 depends on PPC_BOOK3S_64
437 config ARCH_MEMORY_PROBE
439 depends on MEMORY_HOTPLUG
441 # Some NUMA nodes have memory ranges that span
442 # other nodes. Even though a pfn is valid and
443 # between a node's start and end pfns, it may not
444 # reside on that node. See memmap_init_zone()
446 config NODES_SPAN_OTHER_NODES
448 depends on NEED_MULTIPLE_NODES
450 config PPC_HAS_HASH_64K
456 bool "Using standard binutils settings"
460 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
461 Note, that kernel will be able to run only those applications,
462 which had been compiled using binutils later than 2.17.50.0.3 with
463 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
464 the older binutils, you can patch them with a trivial patch, which
465 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
471 Select the kernel logical page size. Increasing the page size
472 will reduce software overhead at each page boundary, allow
473 hardware prefetch mechanisms to be more effective, and allow
474 larger dma transfers increasing IO efficiency and reducing
475 overhead. However the utilization of memory will increase.
476 For example, each cached file will using a multiple of the
477 page size to hold its contents and the difference between the
478 end of file and the end of page is wasted.
480 Some dedicated systems, such as software raid serving with
481 accelerated calculations, have shown significant increases.
483 If you configure a 64 bit kernel for 64k pages but the
484 processor does not support them, then the kernel will simulate
485 them with 4k pages, loading them on demand, but with the
486 reduced software overhead and larger internal fragmentation.
487 For the 32 bit kernel, a large page option will not be offered
488 unless it is supported by the configured processor.
490 If unsure, choose 4K_PAGES.
496 bool "16k page size" if 44x
499 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
500 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
502 config PPC_256K_PAGES
503 bool "256k page size" if 44x
504 depends on !STDBINUTILS
506 Make the page size 256k.
508 As the ELF standard only requires alignment to support page
509 sizes up to 64k, you will need to compile all of your user
510 space applications with a non-standard binutils settings
511 (see the STDBINUTILS description for details).
513 Say N unless you know what you are doing.
517 config FORCE_MAX_ZONEORDER
518 int "Maximum zone order"
519 range 9 64 if PPC64 && PPC_64K_PAGES
520 default "9" if PPC64 && PPC_64K_PAGES
521 range 13 64 if PPC64 && !PPC_64K_PAGES
522 default "13" if PPC64 && !PPC_64K_PAGES
523 range 9 64 if PPC32 && PPC_16K_PAGES
524 default "9" if PPC32 && PPC_16K_PAGES
525 range 7 64 if PPC32 && PPC_64K_PAGES
526 default "7" if PPC32 && PPC_64K_PAGES
527 range 5 64 if PPC32 && PPC_256K_PAGES
528 default "5" if PPC32 && PPC_256K_PAGES
532 The kernel memory allocator divides physically contiguous memory
533 blocks into "zones", where each zone is a power of two number of
534 pages. This option selects the largest power of two that the kernel
535 keeps in the memory allocator. If you need to allocate very large
536 blocks of physically contiguous memory, then you may need to
539 This config option is actually maximum order plus one. For example,
540 a value of 11 means that the largest free memory block is 2^10 pages.
542 The page size is not necessarily 4KB. For example, on 64-bit
543 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
544 this in mind when choosing a value for this option.
546 config PPC_SUBPAGE_PROT
547 bool "Support setting protections for 4k subpages"
548 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
550 This option adds support for a system call to allow user programs
551 to set access permissions (read/write, readonly, or no access)
552 on the 4k subpages of each 64k page.
555 bool "SMT (Hyperthreading) scheduler support"
556 depends on PPC64 && SMP
558 SMT scheduler support improves the CPU scheduler's decision making
559 when dealing with POWER5 cpus at a cost of slightly increased
560 overhead in some places. If unsure say N here.
563 bool "Default bootloader kernel arguments"
566 string "Initial kernel command string"
567 depends on CMDLINE_BOOL
568 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
570 On some platforms, there is currently no way for the boot loader to
571 pass arguments to the kernel. For these platforms, you can supply
572 some command-line options at build time by entering them here. In
573 most cases you will need to specify the root device here.
576 string "Additional default image types"
578 List additional targets to be built by the bootwrapper here (separated
579 by spaces). This is useful for targets that depend of device tree
580 files in the .dts directory.
582 Targets in this list will be build as part of the default build
583 target, or when the user does a 'make zImage' or a
584 'make zImage.initrd'.
586 If unsure, leave blank
588 config ARCH_WANTS_FREEZER_CONTROL
592 source kernel/power/Kconfig
595 bool "Enable seccomp to safely compute untrusted bytecode"
599 This kernel feature is useful for number crunching applications
600 that may need to compute untrusted bytecode during their
601 execution. By using pipes or other transports made available to
602 the process as file descriptors supporting the read/write
603 syscalls, it's possible to isolate those applications in
604 their own address space using seccomp. Once seccomp is
605 enabled via /proc/<pid>/seccomp, it cannot be disabled
606 and the task is only allowed to execute a few safe syscalls
607 defined by each seccomp mode.
609 If unsure, say Y. Only embedded should say N here.
615 default !PPC_ISERIES || PCI
620 bool "Support for ISA-bus hardware"
621 depends on PPC_PREP || PPC_CHRP
624 Find out whether you have ISA slots on your motherboard. ISA is the
625 name of a bus system, i.e. the way the CPU talks to the other stuff
626 inside your box. If you have an Apple machine, say N here; if you
627 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
628 you have an embedded board, consult your board documentation.
634 config NEED_DMA_MAP_STATE
635 def_bool (PPC64 || NOT_COHERENT_CACHE)
637 config NEED_SG_DMA_LENGTH
640 config GENERIC_ISA_DMA
642 depends on ISA_DMA_API
645 config PPC_INDIRECT_PCI
648 default y if 40x || 44x
659 select HAVE_CAN_FLEXCAN if NET && CAN
660 select PPC_CLOCK if CAN_FLEXCAN
664 select PPC_INDIRECT_PCI
670 depends on SUSPEND && (PPC_85xx || PPC_86xx)
672 Freescale MPC85xx/MPC86xx power management controller support
673 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
678 depends on SUSPEND && (44x || 40x)
680 PPC4xx Clock Power Management (CPM) support (suspend/resume).
681 It also enables support for two different idle states (idle-wait
688 bool "Freescale Local Bus support"
691 Enables reporting of errors from the Freescale local bus
692 controller. Also contains some common code used by
693 drivers for specific local bus peripherals.
697 depends on PPC_83xx || QUICC_ENGINE || CPM2
699 Freescale General-purpose Timers support
701 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
705 # Platforms that what PCI turned unconditionally just do select PCI
706 # in their config node. Platforms that want to choose at config
707 # time should select PPC_PCI_CHOICE
708 config PPC_PCI_CHOICE
712 bool "PCI support" if PPC_PCI_CHOICE
713 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
714 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
715 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
716 default PCI_QSPAN if !4xx && !CPM2 && 8xx
717 select ARCH_SUPPORTS_MSI
719 Find out whether your system includes a PCI bus. PCI is the name of
720 a bus system, i.e. the way the CPU talks to the other stuff inside
721 your box. If you say Y here, the kernel will include drivers and
722 infrastructure code to support PCI bus devices.
732 depends on !4xx && !CPM2 && 8xx
735 Say Y here if you have a system based on a Motorola 8xx-series
736 embedded processor with a QSPAN PCI interface, otherwise say N.
740 depends on PCI && 8260
741 select PPC_INDIRECT_PCI
745 bool "Enable workaround for MPC826x erratum PCI 9"
746 depends on PCI_8260 && !8272
750 prompt "IDMA channel for PCI 9 workaround"
753 config 8260_PCI9_IDMA1
756 config 8260_PCI9_IDMA2
759 config 8260_PCI9_IDMA3
762 config 8260_PCI9_IDMA4
767 source "drivers/pci/pcie/Kconfig"
769 source "drivers/pci/Kconfig"
771 source "drivers/pcmcia/Kconfig"
773 source "drivers/pci/hotplug/Kconfig"
780 bool "RapidIO support"
781 depends on HAS_RAPIDIO || PCI
783 If you say Y here, the kernel will include drivers and
784 infrastructure code to support RapidIO interconnect devices.
787 bool "Freescale Embedded SRIO Controller support"
788 depends on RAPIDIO && HAS_RAPIDIO
791 Include support for RapidIO controller on Freescale embedded
792 processors (MPC8548, MPC8641, etc).
794 source "drivers/rapidio/Kconfig"
798 menu "Advanced setup"
801 config ADVANCED_OPTIONS
802 bool "Prompt for advanced kernel configuration options"
804 This option will enable prompting for a variety of advanced kernel
805 configuration options. These options can cause the kernel to not
806 work if they are set incorrectly, but can be used to optimize certain
807 aspects of kernel memory management.
809 Unless you know what you are doing, say N here.
811 comment "Default settings for advanced configuration options are used"
812 depends on !ADVANCED_OPTIONS
814 config LOWMEM_SIZE_BOOL
815 bool "Set maximum low memory"
816 depends on ADVANCED_OPTIONS
818 This option allows you to set the maximum amount of memory which
819 will be used as "low memory", that is, memory which the kernel can
820 access directly, without having to set up a kernel virtual mapping.
821 This can be useful in optimizing the layout of kernel virtual
824 Say N here unless you know what you are doing.
827 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
830 config LOWMEM_CAM_NUM_BOOL
831 bool "Set number of CAMs to use to map low memory"
832 depends on ADVANCED_OPTIONS && FSL_BOOKE
834 This option allows you to set the maximum number of CAM slots that
835 will be used to map low memory. There are a limited number of slots
836 available and even more limited number that will fit in the L1 MMU.
837 However, using more entries will allow mapping more low memory. This
838 can be useful in optimizing the layout of kernel virtual memory.
840 Say N here unless you know what you are doing.
842 config LOWMEM_CAM_NUM
844 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
848 bool "Build a relocatable kernel (EXPERIMENTAL)"
849 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || PPC_47x)
851 This builds a kernel image that is capable of running at the
852 location the kernel is loaded at (some alignment restrictions may
855 One use is for the kexec on panic case where the recovery kernel
856 must live at a different physical address than the primary
859 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
860 it has been loaded at and the compile time physical addresses
861 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
862 setting can still be useful to bootwrappers that need to know the
863 load location of the kernel (eg. u-boot/mkimage).
865 config PAGE_OFFSET_BOOL
866 bool "Set custom page offset address"
867 depends on ADVANCED_OPTIONS
869 This option allows you to set the kernel virtual address at which
870 the kernel will map low memory. This can be useful in optimizing
871 the virtual memory layout of the system.
873 Say N here unless you know what you are doing.
876 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
879 config KERNEL_START_BOOL
880 bool "Set custom kernel base address"
881 depends on ADVANCED_OPTIONS
883 This option allows you to set the kernel virtual address at which
884 the kernel will be loaded. Normally this should match PAGE_OFFSET
885 however there are times (like kdump) that one might not want them
888 Say N here unless you know what you are doing.
891 hex "Virtual address of kernel base" if KERNEL_START_BOOL
892 default PAGE_OFFSET if PAGE_OFFSET_BOOL
893 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
896 config PHYSICAL_START_BOOL
897 bool "Set physical address where the kernel is loaded"
898 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
900 This gives the physical address where the kernel is loaded.
902 Say N here unless you know what you are doing.
904 config PHYSICAL_START
905 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
906 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
909 config PHYSICAL_ALIGN
911 default "0x04000000" if FSL_BOOKE
913 This value puts the alignment restrictions on physical address
914 where kernel is loaded and run from. Kernel is compiled for an
915 address which meets above alignment restriction.
917 config TASK_SIZE_BOOL
918 bool "Set custom user task size"
919 depends on ADVANCED_OPTIONS
921 This option allows you to set the amount of virtual address space
922 allocated to user tasks. This can be useful in optimizing the
923 virtual memory layout of the system.
925 Say N here unless you know what you are doing.
928 hex "Size of user task space" if TASK_SIZE_BOOL
929 default "0x80000000" if PPC_PREP || PPC_8xx
932 config CONSISTENT_SIZE_BOOL
933 bool "Set custom consistent memory pool size"
934 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
936 This option allows you to set the size of the
937 consistent memory pool. This pool of virtual memory
938 is used to make consistent memory allocations.
940 config CONSISTENT_SIZE
941 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
942 default "0x00200000" if NOT_COHERENT_CACHE
945 bool "Pinned Kernel TLBs (860 ONLY)"
946 depends on ADVANCED_OPTIONS && 8xx
951 bool "Build a relocatable kernel"
953 This builds a kernel image that is capable of running anywhere
954 in the RMA (real memory area) at any 16k-aligned base address.
955 The kernel is linked as a position-independent executable (PIE)
956 and contains dynamic relocations which are processed early
957 in the bootup process.
959 One use is for the kexec on panic case where the recovery kernel
960 must live at a different physical address than the primary
965 default "0xc000000000000000"
968 default "0xc000000000000000"
969 config PHYSICAL_START
976 source "drivers/Kconfig"
980 source "arch/powerpc/sysdev/qe_lib/Kconfig"
984 source "arch/powerpc/Kconfig.debug"
986 source "security/Kconfig"
990 depends on COMPAT && KEYS
993 source "crypto/Kconfig"
1000 config PPC_LIB_RHEAP
1003 source "arch/powerpc/kvm/Kconfig"