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
140 select ARCH_SUPPORTS_ATOMIC_RMW
149 select COMPAT_BINFMT_ELF
151 config SYSVIPC_COMPAT
153 depends on COMPAT && SYSVIPC
156 # All PPC32s use generic nvram driver through ppc_md
161 config SCHED_OMIT_FRAME_POINTER
165 config ARCH_MAY_HAVE_PC_FDC
167 default !PPC_PSERIES || PCI
172 config PPC_UDBG_16550
176 config GENERIC_TBSYNC
178 default y if PPC32 && SMP
190 config SYS_SUPPORTS_APM_EMULATION
191 default y if PMAC_APM_EMU
197 Used to allow a board to specify it wants an ePAPR compliant wrapper.
200 config DEFAULT_UIMAGE
203 Used to allow a board to specify it wants a uImage built by default
209 config ARCH_HIBERNATION_POSSIBLE
213 config ARCH_SUSPEND_POSSIBLE
215 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
216 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
218 config PPC_DCR_NATIVE
228 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
231 config PPC_OF_PLATFORM_PCI
234 depends on PPC64 # not supported on 32 bits yet
237 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
240 config PPC_ADV_DEBUG_REGS
242 depends on 40x || BOOKE
245 config PPC_ADV_DEBUG_IACS
247 depends on PPC_ADV_DEBUG_REGS
251 config PPC_ADV_DEBUG_DACS
253 depends on PPC_ADV_DEBUG_REGS
256 config PPC_ADV_DEBUG_DVCS
258 depends on PPC_ADV_DEBUG_REGS
262 config PPC_ADV_DEBUG_DAC_RANGE
264 depends on PPC_ADV_DEBUG_REGS && 44x
267 source "init/Kconfig"
269 source "kernel/Kconfig.freezer"
271 source "arch/powerpc/sysdev/Kconfig"
272 source "arch/powerpc/platforms/Kconfig"
274 menu "Kernel options"
277 bool "High memory support"
280 source kernel/time/Kconfig
281 source kernel/Kconfig.hz
282 source kernel/Kconfig.preempt
283 source "fs/Kconfig.binfmt"
285 config HUGETLB_PAGE_SIZE_VARIABLE
287 depends on HUGETLB_PAGE
290 config MATH_EMULATION
291 bool "Math emulation"
292 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
294 Some PowerPC chips designed for embedded applications do not have
295 a floating-point unit and therefore do not implement the
296 floating-point instructions in the PowerPC instruction set. If you
297 say Y here, the kernel will include code to emulate a floating-point
298 unit, which will allow programs that use floating-point
301 config 8XX_MINIMAL_FPEMU
302 bool "Minimal math emulation for 8xx"
303 depends on 8xx && !MATH_EMULATION
305 Older arch/ppc kernels still emulated a few floating point
306 instructions such as load and store, even when full math
307 emulation is disabled. Say "Y" here if you want to preserve
310 It is recommended that you build a soft-float userspace instead.
316 bool "SWIOTLB support"
320 Support for IO bounce buffering for systems without an IOMMU.
321 This allows us to DMA to the full physical address space on
322 platforms where the size of a physical address is larger
323 than the bus address. Not all platforms support this.
326 bool "Support for enabling/disabling CPUs"
327 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV)
329 Say Y here to be able to disable and re-enable individual
330 CPUs at runtime on SMP machines.
332 Say N if you are unsure.
334 config ARCH_CPU_PROBE_RELEASE
336 depends on HOTPLUG_CPU
338 config ARCH_ENABLE_MEMORY_HOTPLUG
341 config ARCH_HAS_WALK_MEMORY
344 config ARCH_ENABLE_MEMORY_HOTREMOVE
348 bool "kexec system call (EXPERIMENTAL)"
349 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP && !PPC_47x)) && EXPERIMENTAL
351 kexec is a system call that implements the ability to shutdown your
352 current kernel, and to start another kernel. It is like a reboot
353 but it is independent of the system firmware. And like a reboot
354 you can start any kernel with it, not just Linux.
356 The name comes from the similarity to the exec system call.
358 It is an ongoing process to be certain the hardware in a machine
359 is properly shutdown, so do not be surprised if this code does not
360 initially work for you. It may help to enable device hotplugging
361 support. As of this writing the exact hardware interface is
362 strongly in flux, so no good recommendation can be made.
365 bool "Build a kdump crash kernel"
366 depends on PPC64 || 6xx || FSL_BOOKE
367 select RELOCATABLE if PPC64 || FSL_BOOKE
369 Build a kernel suitable for use as a kdump capture kernel.
370 The same kernel binary can be used as production kernel and dump
374 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
375 depends on PPC_PSERIES && EXPERIMENTAL
377 Hypervisor-assisted dump is meant to be a kdump replacement
378 offering robustness and speed not possible without system
379 hypervisor assistance.
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
433 config ARCH_MEMORY_PROBE
435 depends on MEMORY_HOTPLUG
437 # Some NUMA nodes have memory ranges that span
438 # other nodes. Even though a pfn is valid and
439 # between a node's start and end pfns, it may not
440 # reside on that node. See memmap_init_zone()
442 config NODES_SPAN_OTHER_NODES
444 depends on NEED_MULTIPLE_NODES
446 config PPC_HAS_HASH_64K
452 bool "Using standard binutils settings"
456 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
457 Note, that kernel will be able to run only those applications,
458 which had been compiled using binutils later than 2.17.50.0.3 with
459 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
460 the older binutils, you can patch them with a trivial patch, which
461 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
467 Select the kernel logical page size. Increasing the page size
468 will reduce software overhead at each page boundary, allow
469 hardware prefetch mechanisms to be more effective, and allow
470 larger dma transfers increasing IO efficiency and reducing
471 overhead. However the utilization of memory will increase.
472 For example, each cached file will using a multiple of the
473 page size to hold its contents and the difference between the
474 end of file and the end of page is wasted.
476 Some dedicated systems, such as software raid serving with
477 accelerated calculations, have shown significant increases.
479 If you configure a 64 bit kernel for 64k pages but the
480 processor does not support them, then the kernel will simulate
481 them with 4k pages, loading them on demand, but with the
482 reduced software overhead and larger internal fragmentation.
483 For the 32 bit kernel, a large page option will not be offered
484 unless it is supported by the configured processor.
486 If unsure, choose 4K_PAGES.
492 bool "16k page size" if 44x
495 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
496 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
498 config PPC_256K_PAGES
499 bool "256k page size" if 44x
500 depends on !STDBINUTILS
502 Make the page size 256k.
504 As the ELF standard only requires alignment to support page
505 sizes up to 64k, you will need to compile all of your user
506 space applications with a non-standard binutils settings
507 (see the STDBINUTILS description for details).
509 Say N unless you know what you are doing.
513 config FORCE_MAX_ZONEORDER
514 int "Maximum zone order"
515 range 9 64 if PPC64 && PPC_64K_PAGES
516 default "9" if PPC64 && PPC_64K_PAGES
517 range 13 64 if PPC64 && !PPC_64K_PAGES
518 default "13" if PPC64 && !PPC_64K_PAGES
519 range 9 64 if PPC32 && PPC_16K_PAGES
520 default "9" if PPC32 && PPC_16K_PAGES
521 range 7 64 if PPC32 && PPC_64K_PAGES
522 default "7" if PPC32 && PPC_64K_PAGES
523 range 5 64 if PPC32 && PPC_256K_PAGES
524 default "5" if PPC32 && PPC_256K_PAGES
528 The kernel memory allocator divides physically contiguous memory
529 blocks into "zones", where each zone is a power of two number of
530 pages. This option selects the largest power of two that the kernel
531 keeps in the memory allocator. If you need to allocate very large
532 blocks of physically contiguous memory, then you may need to
535 This config option is actually maximum order plus one. For example,
536 a value of 11 means that the largest free memory block is 2^10 pages.
538 The page size is not necessarily 4KB. For example, on 64-bit
539 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
540 this in mind when choosing a value for this option.
542 config PPC_SUBPAGE_PROT
543 bool "Support setting protections for 4k subpages"
544 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
546 This option adds support for a system call to allow user programs
547 to set access permissions (read/write, readonly, or no access)
548 on the 4k subpages of each 64k page.
551 bool "SMT (Hyperthreading) scheduler support"
552 depends on PPC64 && SMP
554 SMT scheduler support improves the CPU scheduler's decision making
555 when dealing with POWER5 cpus at a cost of slightly increased
556 overhead in some places. If unsure say N here.
559 bool "Default bootloader kernel arguments"
562 string "Initial kernel command string"
563 depends on CMDLINE_BOOL
564 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
566 On some platforms, there is currently no way for the boot loader to
567 pass arguments to the kernel. For these platforms, you can supply
568 some command-line options at build time by entering them here. In
569 most cases you will need to specify the root device here.
572 string "Additional default image types"
574 List additional targets to be built by the bootwrapper here (separated
575 by spaces). This is useful for targets that depend of device tree
576 files in the .dts directory.
578 Targets in this list will be build as part of the default build
579 target, or when the user does a 'make zImage' or a
580 'make zImage.initrd'.
582 If unsure, leave blank
584 config ARCH_WANTS_FREEZER_CONTROL
588 source kernel/power/Kconfig
591 bool "Enable seccomp to safely compute untrusted bytecode"
595 This kernel feature is useful for number crunching applications
596 that may need to compute untrusted bytecode during their
597 execution. By using pipes or other transports made available to
598 the process as file descriptors supporting the read/write
599 syscalls, it's possible to isolate those applications in
600 their own address space using seccomp. Once seccomp is
601 enabled via /proc/<pid>/seccomp, it cannot be disabled
602 and the task is only allowed to execute a few safe syscalls
603 defined by each seccomp mode.
605 If unsure, say Y. Only embedded should say N here.
611 default !PPC_ISERIES || PCI
616 bool "Support for ISA-bus hardware"
617 depends on PPC_PREP || PPC_CHRP
620 Find out whether you have ISA slots on your motherboard. ISA is the
621 name of a bus system, i.e. the way the CPU talks to the other stuff
622 inside your box. If you have an Apple machine, say N here; if you
623 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
624 you have an embedded board, consult your board documentation.
630 config NEED_DMA_MAP_STATE
631 def_bool (PPC64 || NOT_COHERENT_CACHE)
633 config NEED_SG_DMA_LENGTH
636 config GENERIC_ISA_DMA
638 depends on ISA_DMA_API
641 config PPC_INDIRECT_PCI
644 default y if 40x || 44x
655 select HAVE_CAN_FLEXCAN if NET && CAN
656 select PPC_CLOCK if CAN_FLEXCAN
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
745 source "drivers/pci/pcie/Kconfig"
747 source "drivers/pci/Kconfig"
749 source "drivers/pcmcia/Kconfig"
751 source "drivers/pci/hotplug/Kconfig"
758 bool "RapidIO support"
759 depends on HAS_RAPIDIO || PCI
761 If you say Y here, the kernel will include drivers and
762 infrastructure code to support RapidIO interconnect devices.
765 bool "Freescale Embedded SRIO Controller support"
766 depends on RAPIDIO && HAS_RAPIDIO
769 Include support for RapidIO controller on Freescale embedded
770 processors (MPC8548, MPC8641, etc).
772 source "drivers/rapidio/Kconfig"
776 menu "Advanced setup"
779 config ADVANCED_OPTIONS
780 bool "Prompt for advanced kernel configuration options"
782 This option will enable prompting for a variety of advanced kernel
783 configuration options. These options can cause the kernel to not
784 work if they are set incorrectly, but can be used to optimize certain
785 aspects of kernel memory management.
787 Unless you know what you are doing, say N here.
789 comment "Default settings for advanced configuration options are used"
790 depends on !ADVANCED_OPTIONS
792 config LOWMEM_SIZE_BOOL
793 bool "Set maximum low memory"
794 depends on ADVANCED_OPTIONS
796 This option allows you to set the maximum amount of memory which
797 will be used as "low memory", that is, memory which the kernel can
798 access directly, without having to set up a kernel virtual mapping.
799 This can be useful in optimizing the layout of kernel virtual
802 Say N here unless you know what you are doing.
805 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
808 config LOWMEM_CAM_NUM_BOOL
809 bool "Set number of CAMs to use to map low memory"
810 depends on ADVANCED_OPTIONS && FSL_BOOKE
812 This option allows you to set the maximum number of CAM slots that
813 will be used to map low memory. There are a limited number of slots
814 available and even more limited number that will fit in the L1 MMU.
815 However, using more entries will allow mapping more low memory. This
816 can be useful in optimizing the layout of kernel virtual memory.
818 Say N here unless you know what you are doing.
820 config LOWMEM_CAM_NUM
822 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
826 bool "Build a relocatable kernel (EXPERIMENTAL)"
827 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || PPC_47x)
829 This builds a kernel image that is capable of running at the
830 location the kernel is loaded at (some alignment restrictions may
833 One use is for the kexec on panic case where the recovery kernel
834 must live at a different physical address than the primary
837 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
838 it has been loaded at and the compile time physical addresses
839 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
840 setting can still be useful to bootwrappers that need to know the
841 load location of the kernel (eg. u-boot/mkimage).
843 config PAGE_OFFSET_BOOL
844 bool "Set custom page offset address"
845 depends on ADVANCED_OPTIONS
847 This option allows you to set the kernel virtual address at which
848 the kernel will map low memory. This can be useful in optimizing
849 the virtual memory layout of the system.
851 Say N here unless you know what you are doing.
854 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
857 config KERNEL_START_BOOL
858 bool "Set custom kernel base address"
859 depends on ADVANCED_OPTIONS
861 This option allows you to set the kernel virtual address at which
862 the kernel will be loaded. Normally this should match PAGE_OFFSET
863 however there are times (like kdump) that one might not want them
866 Say N here unless you know what you are doing.
869 hex "Virtual address of kernel base" if KERNEL_START_BOOL
870 default PAGE_OFFSET if PAGE_OFFSET_BOOL
871 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
874 config PHYSICAL_START_BOOL
875 bool "Set physical address where the kernel is loaded"
876 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
878 This gives the physical address where the kernel is loaded.
880 Say N here unless you know what you are doing.
882 config PHYSICAL_START
883 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
884 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
887 config PHYSICAL_ALIGN
889 default "0x04000000" if FSL_BOOKE
891 This value puts the alignment restrictions on physical address
892 where kernel is loaded and run from. Kernel is compiled for an
893 address which meets above alignment restriction.
895 config TASK_SIZE_BOOL
896 bool "Set custom user task size"
897 depends on ADVANCED_OPTIONS
899 This option allows you to set the amount of virtual address space
900 allocated to user tasks. This can be useful in optimizing the
901 virtual memory layout of the system.
903 Say N here unless you know what you are doing.
906 hex "Size of user task space" if TASK_SIZE_BOOL
907 default "0x80000000" if PPC_PREP || PPC_8xx
910 config CONSISTENT_SIZE_BOOL
911 bool "Set custom consistent memory pool size"
912 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
914 This option allows you to set the size of the
915 consistent memory pool. This pool of virtual memory
916 is used to make consistent memory allocations.
918 config CONSISTENT_SIZE
919 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
920 default "0x00200000" if NOT_COHERENT_CACHE
923 bool "Pinned Kernel TLBs (860 ONLY)"
924 depends on ADVANCED_OPTIONS && 8xx
929 bool "Build a relocatable kernel"
931 This builds a kernel image that is capable of running anywhere
932 in the RMA (real memory area) at any 16k-aligned base address.
933 The kernel is linked as a position-independent executable (PIE)
934 and contains dynamic relocations which are processed early
935 in the bootup process.
937 One use is for the kexec on panic case where the recovery kernel
938 must live at a different physical address than the primary
941 # This value must have zeroes in the bottom 60 bits otherwise lots will break
944 default "0xc000000000000000"
947 default "0xc000000000000000"
948 config PHYSICAL_START
955 source "drivers/Kconfig"
959 source "arch/powerpc/sysdev/qe_lib/Kconfig"
963 source "arch/powerpc/Kconfig.debug"
965 source "security/Kconfig"
969 depends on COMPAT && KEYS
972 source "crypto/Kconfig"
982 source "arch/powerpc/kvm/Kconfig"