1 source "arch/powerpc/platforms/Kconfig.cputype"
20 config ARCH_PHYS_ADDR_T_64BIT
21 def_bool PPC64 || PHYS_64BIT
27 config GENERIC_CMOS_UPDATE
30 config GENERIC_TIME_VSYSCALL
33 config GENERIC_CLOCKEVENTS
36 config GENERIC_HARDIRQS
40 config GENERIC_HARDIRQS_NO__DO_IRQ
44 config HAVE_SETUP_PER_CPU_AREA
47 config NEED_PER_CPU_EMBED_FIRST_CHUNK
55 int "Number of virtual interrupt numbers"
59 This defines the number of virtual interrupt numbers the kernel
60 can manage. Virtual interrupt numbers are what you see in
61 /proc/interrupts. If you configure your system to have too few,
62 drivers will fail to load or worse - handle with care.
64 config STACKTRACE_SUPPORT
68 config HAVE_LATENCYTOP_SUPPORT
71 config TRACE_IRQFLAGS_SUPPORT
75 config LOCKDEP_SUPPORT
79 config RWSEM_GENERIC_SPINLOCK
82 config RWSEM_XCHGADD_ALGORITHM
86 config GENERIC_LOCKBREAK
89 depends on SMP && PREEMPT
91 config ARCH_HAS_ILOG2_U32
95 config ARCH_HAS_ILOG2_U64
99 config GENERIC_HWEIGHT
103 config GENERIC_FIND_NEXT_BIT
110 Generic GPIO API support
112 config ARCH_NO_VIRT_TO_BUS
120 select HAVE_FTRACE_MCOUNT_RECORD
121 select HAVE_DYNAMIC_FTRACE
122 select HAVE_FUNCTION_TRACER
123 select HAVE_FUNCTION_GRAPH_TRACER
124 select ARCH_WANT_OPTIONAL_GPIOLIB
126 select HAVE_IOREMAP_PROT
127 select HAVE_EFFICIENT_UNALIGNED_ACCESS
129 select HAVE_ARCH_KGDB
130 select HAVE_KRETPROBES
131 select HAVE_ARCH_TRACEHOOK
133 select HAVE_DMA_ATTRS
134 select HAVE_DMA_API_DEBUG
135 select USE_GENERIC_SMP_HELPERS if SMP
137 select HAVE_SYSCALL_WRAPPERS if PPC64
138 select GENERIC_ATOMIC64 if PPC32
140 select HAVE_PERF_EVENTS
141 select HAVE_REGS_AND_STACK_ACCESS_API
142 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
151 select COMPAT_BINFMT_ELF
153 config SYSVIPC_COMPAT
155 depends on COMPAT && SYSVIPC
158 # All PPC32s use generic nvram driver through ppc_md
163 config SCHED_OMIT_FRAME_POINTER
167 config ARCH_MAY_HAVE_PC_FDC
169 default !PPC_PSERIES || PCI
174 config PPC_UDBG_16550
178 config GENERIC_TBSYNC
180 default y if PPC32 && SMP
192 config SYS_SUPPORTS_APM_EMULATION
193 default y if PMAC_APM_EMU
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 || PPC_86xx || PPC_PSERIES
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.
393 bool "Support sparse irq numbering"
396 This enables support for sparse irqs. This is useful for distro
397 kernels that want to define a high CONFIG_NR_CPUS value but still
398 want to have low kernel memory footprint on smaller machines.
400 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
401 out the irq_desc[] array in a more NUMA-friendly way. )
403 If you don't know what to do here, say N.
408 default y if SMP && PPC_PSERIES
414 depends on NEED_MULTIPLE_NODES
416 config MAX_ACTIVE_REGIONS
418 default "256" if PPC64
421 config ARCH_SELECT_MEMORY_MODEL
425 config ARCH_FLATMEM_ENABLE
427 depends on (PPC64 && !NUMA) || PPC32
429 config ARCH_SPARSEMEM_ENABLE
432 select SPARSEMEM_VMEMMAP_ENABLE
434 config ARCH_SPARSEMEM_DEFAULT
436 depends on (SMP && PPC_PSERIES) || PPC_PS3
438 config ARCH_POPULATES_NODE_MAP
441 config SYS_SUPPORTS_HUGETLBFS
443 depends on PPC_BOOK3S_64
447 config ARCH_MEMORY_PROBE
449 depends on MEMORY_HOTPLUG
451 # Some NUMA nodes have memory ranges that span
452 # other nodes. Even though a pfn is valid and
453 # between a node's start and end pfns, it may not
454 # reside on that node. See memmap_init_zone()
456 config NODES_SPAN_OTHER_NODES
458 depends on NEED_MULTIPLE_NODES
460 config PPC_HAS_HASH_64K
466 bool "Using standard binutils settings"
470 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
471 Note, that kernel will be able to run only those applications,
472 which had been compiled using binutils later than 2.17.50.0.3 with
473 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
474 the older binutils, you can patch them with a trivial patch, which
475 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
481 Select the kernel logical page size. Increasing the page size
482 will reduce software overhead at each page boundary, allow
483 hardware prefetch mechanisms to be more effective, and allow
484 larger dma transfers increasing IO efficiency and reducing
485 overhead. However the utilization of memory will increase.
486 For example, each cached file will using a multiple of the
487 page size to hold its contents and the difference between the
488 end of file and the end of page is wasted.
490 Some dedicated systems, such as software raid serving with
491 accelerated calculations, have shown significant increases.
493 If you configure a 64 bit kernel for 64k pages but the
494 processor does not support them, then the kernel will simulate
495 them with 4k pages, loading them on demand, but with the
496 reduced software overhead and larger internal fragmentation.
497 For the 32 bit kernel, a large page option will not be offered
498 unless it is supported by the configured processor.
500 If unsure, choose 4K_PAGES.
506 bool "16k page size" if 44x
509 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
510 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
512 config PPC_256K_PAGES
513 bool "256k page size" if 44x
514 depends on !STDBINUTILS
516 Make the page size 256k.
518 As the ELF standard only requires alignment to support page
519 sizes up to 64k, you will need to compile all of your user
520 space applications with a non-standard binutils settings
521 (see the STDBINUTILS description for details).
523 Say N unless you know what you are doing.
527 config FORCE_MAX_ZONEORDER
528 int "Maximum zone order"
529 range 9 64 if PPC64 && PPC_64K_PAGES
530 default "9" if PPC64 && PPC_64K_PAGES
531 range 13 64 if PPC64 && !PPC_64K_PAGES
532 default "13" if PPC64 && !PPC_64K_PAGES
533 range 9 64 if PPC32 && PPC_16K_PAGES
534 default "9" if PPC32 && PPC_16K_PAGES
535 range 7 64 if PPC32 && PPC_64K_PAGES
536 default "7" if PPC32 && PPC_64K_PAGES
537 range 5 64 if PPC32 && PPC_256K_PAGES
538 default "5" if PPC32 && PPC_256K_PAGES
542 The kernel memory allocator divides physically contiguous memory
543 blocks into "zones", where each zone is a power of two number of
544 pages. This option selects the largest power of two that the kernel
545 keeps in the memory allocator. If you need to allocate very large
546 blocks of physically contiguous memory, then you may need to
549 This config option is actually maximum order plus one. For example,
550 a value of 11 means that the largest free memory block is 2^10 pages.
552 The page size is not necessarily 4KB. For example, on 64-bit
553 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
554 this in mind when choosing a value for this option.
556 config PPC_SUBPAGE_PROT
557 bool "Support setting protections for 4k subpages"
558 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
560 This option adds support for a system call to allow user programs
561 to set access permissions (read/write, readonly, or no access)
562 on the 4k subpages of each 64k page.
565 bool "SMT (Hyperthreading) scheduler support"
566 depends on PPC64 && SMP
568 SMT scheduler support improves the CPU scheduler's decision making
569 when dealing with POWER5 cpus at a cost of slightly increased
570 overhead in some places. If unsure say N here.
573 bool "Default bootloader kernel arguments"
576 string "Initial kernel command string"
577 depends on CMDLINE_BOOL
578 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
580 On some platforms, there is currently no way for the boot loader to
581 pass arguments to the kernel. For these platforms, you can supply
582 some command-line options at build time by entering them here. In
583 most cases you will need to specify the root device here.
586 string "Additional default image types"
588 List additional targets to be built by the bootwrapper here (separated
589 by spaces). This is useful for targets that depend of device tree
590 files in the .dts directory.
592 Targets in this list will be build as part of the default build
593 target, or when the user does a 'make zImage' or a
594 'make zImage.initrd'.
596 If unsure, leave blank
599 config ARCH_WANTS_FREEZER_CONTROL
603 source kernel/power/Kconfig
607 bool "Enable seccomp to safely compute untrusted bytecode"
611 This kernel feature is useful for number crunching applications
612 that may need to compute untrusted bytecode during their
613 execution. By using pipes or other transports made available to
614 the process as file descriptors supporting the read/write
615 syscalls, it's possible to isolate those applications in
616 their own address space using seccomp. Once seccomp is
617 enabled via /proc/<pid>/seccomp, it cannot be disabled
618 and the task is only allowed to execute a few safe syscalls
619 defined by each seccomp mode.
621 If unsure, say Y. Only embedded should say N here.
627 default !PPC_ISERIES || PCI
632 bool "Support for ISA-bus hardware"
633 depends on PPC_PREP || PPC_CHRP
636 Find out whether you have ISA slots on your motherboard. ISA is the
637 name of a bus system, i.e. the way the CPU talks to the other stuff
638 inside your box. If you have an Apple machine, say N here; if you
639 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
640 you have an embedded board, consult your board documentation.
646 config NEED_DMA_MAP_STATE
647 def_bool (PPC64 || NOT_COHERENT_CACHE)
649 config NEED_SG_DMA_LENGTH
652 config GENERIC_ISA_DMA
654 depends on ISA_DMA_API
657 config PPC_INDIRECT_PCI
660 default y if 40x || 44x
674 select PPC_INDIRECT_PCI
680 depends on SUSPEND && (PPC_85xx || PPC_86xx)
682 Freescale MPC85xx/MPC86xx power management controller support
683 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
689 bool "Freescale Local Bus support"
692 Enables reporting of errors from the Freescale local bus
693 controller. Also contains some common code used by
694 drivers for specific local bus peripherals.
698 depends on PPC_83xx || QUICC_ENGINE || CPM2
700 Freescale General-purpose Timers support
702 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
706 # Platforms that what PCI turned unconditionally just do select PCI
707 # in their config node. Platforms that want to choose at config
708 # time should select PPC_PCI_CHOICE
709 config PPC_PCI_CHOICE
713 bool "PCI support" if PPC_PCI_CHOICE
714 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
715 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
716 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
717 default PCI_QSPAN if !4xx && !CPM2 && 8xx
718 select ARCH_SUPPORTS_MSI
720 Find out whether your system includes a PCI bus. PCI is the name of
721 a bus system, i.e. the way the CPU talks to the other stuff inside
722 your box. If you say Y here, the kernel will include drivers and
723 infrastructure code to support PCI bus devices.
733 depends on !4xx && !CPM2 && 8xx
736 Say Y here if you have a system based on a Motorola 8xx-series
737 embedded processor with a QSPAN PCI interface, otherwise say N.
741 depends on PCI && 8260
742 select PPC_INDIRECT_PCI
746 bool "Enable workaround for MPC826x erratum PCI 9"
747 depends on PCI_8260 && !8272
751 prompt "IDMA channel for PCI 9 workaround"
754 config 8260_PCI9_IDMA1
757 config 8260_PCI9_IDMA2
760 config 8260_PCI9_IDMA3
763 config 8260_PCI9_IDMA4
768 source "drivers/pci/pcie/Kconfig"
770 source "drivers/pci/Kconfig"
772 source "drivers/pcmcia/Kconfig"
774 source "drivers/pci/hotplug/Kconfig"
781 bool "RapidIO support"
782 depends on HAS_RAPIDIO
784 If you say Y here, the kernel will include drivers and
785 infrastructure code to support RapidIO interconnect devices.
787 source "drivers/rapidio/Kconfig"
791 menu "Advanced setup"
794 config ADVANCED_OPTIONS
795 bool "Prompt for advanced kernel configuration options"
797 This option will enable prompting for a variety of advanced kernel
798 configuration options. These options can cause the kernel to not
799 work if they are set incorrectly, but can be used to optimize certain
800 aspects of kernel memory management.
802 Unless you know what you are doing, say N here.
804 comment "Default settings for advanced configuration options are used"
805 depends on !ADVANCED_OPTIONS
807 config LOWMEM_SIZE_BOOL
808 bool "Set maximum low memory"
809 depends on ADVANCED_OPTIONS
811 This option allows you to set the maximum amount of memory which
812 will be used as "low memory", that is, memory which the kernel can
813 access directly, without having to set up a kernel virtual mapping.
814 This can be useful in optimizing the layout of kernel virtual
817 Say N here unless you know what you are doing.
820 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
823 config LOWMEM_CAM_NUM_BOOL
824 bool "Set number of CAMs to use to map low memory"
825 depends on ADVANCED_OPTIONS && FSL_BOOKE
827 This option allows you to set the maximum number of CAM slots that
828 will be used to map low memory. There are a limited number of slots
829 available and even more limited number that will fit in the L1 MMU.
830 However, using more entries will allow mapping more low memory. This
831 can be useful in optimizing the layout of kernel virtual memory.
833 Say N here unless you know what you are doing.
835 config LOWMEM_CAM_NUM
837 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
841 bool "Build a relocatable kernel (EXPERIMENTAL)"
842 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
844 This builds a kernel image that is capable of running at the
845 location the kernel is loaded at (some alignment restrictions may
848 One use is for the kexec on panic case where the recovery kernel
849 must live at a different physical address than the primary
852 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
853 it has been loaded at and the compile time physical addresses
854 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
855 setting can still be useful to bootwrappers that need to know the
856 load location of the kernel (eg. u-boot/mkimage).
858 config PAGE_OFFSET_BOOL
859 bool "Set custom page offset address"
860 depends on ADVANCED_OPTIONS
862 This option allows you to set the kernel virtual address at which
863 the kernel will map low memory. This can be useful in optimizing
864 the virtual memory layout of the system.
866 Say N here unless you know what you are doing.
869 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
872 config KERNEL_START_BOOL
873 bool "Set custom kernel base address"
874 depends on ADVANCED_OPTIONS
876 This option allows you to set the kernel virtual address at which
877 the kernel will be loaded. Normally this should match PAGE_OFFSET
878 however there are times (like kdump) that one might not want them
881 Say N here unless you know what you are doing.
884 hex "Virtual address of kernel base" if KERNEL_START_BOOL
885 default PAGE_OFFSET if PAGE_OFFSET_BOOL
886 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
889 config PHYSICAL_START_BOOL
890 bool "Set physical address where the kernel is loaded"
891 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
893 This gives the physical address where the kernel is loaded.
895 Say N here unless you know what you are doing.
897 config PHYSICAL_START
898 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
899 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
902 config PHYSICAL_ALIGN
904 default "0x04000000" if FSL_BOOKE
906 This value puts the alignment restrictions on physical address
907 where kernel is loaded and run from. Kernel is compiled for an
908 address which meets above alignment restriction.
910 config TASK_SIZE_BOOL
911 bool "Set custom user task size"
912 depends on ADVANCED_OPTIONS
914 This option allows you to set the amount of virtual address space
915 allocated to user tasks. This can be useful in optimizing the
916 virtual memory layout of the system.
918 Say N here unless you know what you are doing.
921 hex "Size of user task space" if TASK_SIZE_BOOL
922 default "0x80000000" if PPC_PREP || PPC_8xx
925 config CONSISTENT_SIZE_BOOL
926 bool "Set custom consistent memory pool size"
927 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
929 This option allows you to set the size of the
930 consistent memory pool. This pool of virtual memory
931 is used to make consistent memory allocations.
933 config CONSISTENT_SIZE
934 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
935 default "0x00200000" if NOT_COHERENT_CACHE
938 bool "Pinned Kernel TLBs (860 ONLY)"
939 depends on ADVANCED_OPTIONS && 8xx
944 bool "Build a relocatable kernel"
946 This builds a kernel image that is capable of running anywhere
947 in the RMA (real memory area) at any 16k-aligned base address.
948 The kernel is linked as a position-independent executable (PIE)
949 and contains dynamic relocations which are processed early
950 in the bootup process.
952 One use is for the kexec on panic case where the recovery kernel
953 must live at a different physical address than the primary
958 default "0xc000000000000000"
961 default "0xc000000000000000"
962 config PHYSICAL_START
969 source "drivers/Kconfig"
973 source "arch/powerpc/sysdev/qe_lib/Kconfig"
977 source "arch/powerpc/Kconfig.debug"
979 source "security/Kconfig"
983 depends on COMPAT && KEYS
986 source "crypto/Kconfig"
996 source "arch/powerpc/kvm/Kconfig"