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
147 select COMPAT_BINFMT_ELF
149 config SYSVIPC_COMPAT
151 depends on COMPAT && SYSVIPC
154 # All PPC32s use generic nvram driver through ppc_md
159 config SCHED_OMIT_FRAME_POINTER
163 config ARCH_MAY_HAVE_PC_FDC
165 default !PPC_PSERIES || PCI
170 config PPC_UDBG_16550
174 config GENERIC_TBSYNC
176 default y if PPC32 && SMP
188 config SYS_SUPPORTS_APM_EMULATION
189 default y if PMAC_APM_EMU
195 Used to allow a board to specify it wants an ePAPR compliant wrapper.
198 config DEFAULT_UIMAGE
201 Used to allow a board to specify it wants a uImage built by default
207 config ARCH_HIBERNATION_POSSIBLE
211 config ARCH_SUSPEND_POSSIBLE
213 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
214 (PPC_85xx && !SMP) || PPC_86xx || PPC_PSERIES || 44x || 40x
216 config PPC_DCR_NATIVE
226 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
229 config PPC_OF_PLATFORM_PCI
232 depends on PPC64 # not supported on 32 bits yet
235 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
238 config PPC_ADV_DEBUG_REGS
240 depends on 40x || BOOKE
243 config PPC_ADV_DEBUG_IACS
245 depends on PPC_ADV_DEBUG_REGS
249 config PPC_ADV_DEBUG_DACS
251 depends on PPC_ADV_DEBUG_REGS
254 config PPC_ADV_DEBUG_DVCS
256 depends on PPC_ADV_DEBUG_REGS
260 config PPC_ADV_DEBUG_DAC_RANGE
262 depends on PPC_ADV_DEBUG_REGS && 44x
265 source "init/Kconfig"
267 source "kernel/Kconfig.freezer"
269 source "arch/powerpc/sysdev/Kconfig"
270 source "arch/powerpc/platforms/Kconfig"
272 menu "Kernel options"
275 bool "High memory support"
278 source kernel/time/Kconfig
279 source kernel/Kconfig.hz
280 source kernel/Kconfig.preempt
281 source "fs/Kconfig.binfmt"
283 config HUGETLB_PAGE_SIZE_VARIABLE
285 depends on HUGETLB_PAGE
288 config MATH_EMULATION
289 bool "Math emulation"
290 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
292 Some PowerPC chips designed for embedded applications do not have
293 a floating-point unit and therefore do not implement the
294 floating-point instructions in the PowerPC instruction set. If you
295 say Y here, the kernel will include code to emulate a floating-point
296 unit, which will allow programs that use floating-point
299 config 8XX_MINIMAL_FPEMU
300 bool "Minimal math emulation for 8xx"
301 depends on 8xx && !MATH_EMULATION
303 Older arch/ppc kernels still emulated a few floating point
304 instructions such as load and store, even when full math
305 emulation is disabled. Say "Y" here if you want to preserve
308 It is recommended that you build a soft-float userspace instead.
314 bool "SWIOTLB support"
318 Support for IO bounce buffering for systems without an IOMMU.
319 This allows us to DMA to the full physical address space on
320 platforms where the size of a physical address is larger
321 than the bus address. Not all platforms support this.
324 bool "Support for enabling/disabling CPUs"
325 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
327 Say Y here to be able to disable and re-enable individual
328 CPUs at runtime on SMP machines.
330 Say N if you are unsure.
332 config ARCH_CPU_PROBE_RELEASE
334 depends on HOTPLUG_CPU
336 config ARCH_ENABLE_MEMORY_HOTPLUG
339 config ARCH_HAS_WALK_MEMORY
342 config ARCH_ENABLE_MEMORY_HOTREMOVE
346 bool "kexec system call (EXPERIMENTAL)"
347 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
349 kexec is a system call that implements the ability to shutdown your
350 current kernel, and to start another kernel. It is like a reboot
351 but it is independent of the system firmware. And like a reboot
352 you can start any kernel with it, not just Linux.
354 The name comes from the similarity to the exec system call.
356 It is an ongoing process to be certain the hardware in a machine
357 is properly shutdown, so do not be surprised if this code does not
358 initially work for you. It may help to enable device hotplugging
359 support. As of this writing the exact hardware interface is
360 strongly in flux, so no good recommendation can be made.
363 bool "Build a kdump crash kernel"
364 depends on PPC64 || 6xx || FSL_BOOKE
365 select RELOCATABLE if PPC64 || FSL_BOOKE
367 Build a kernel suitable for use as a kdump capture kernel.
368 The same kernel binary can be used as production kernel and dump
372 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
373 depends on PPC_PSERIES && EXPERIMENTAL
375 Hypervisor-assisted dump is meant to be a kdump replacement
376 offering robustness and speed not possible without system
377 hypervisor assistance.
382 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
383 default y if PPC_PREP
386 bool "Distribute interrupts on all CPUs by default"
387 depends on SMP && !MV64360
389 This option gives the kernel permission to distribute IRQs across
390 multiple CPUs. Saying N here will route all IRQs to the first
391 CPU. Generally saying Y is safe, although some problems have been
392 reported with SMP Power Macintoshes with this option enabled.
397 default y if SMP && PPC_PSERIES
403 depends on NEED_MULTIPLE_NODES
405 config MAX_ACTIVE_REGIONS
407 default "256" if PPC64
410 config ARCH_SELECT_MEMORY_MODEL
414 config ARCH_FLATMEM_ENABLE
416 depends on (PPC64 && !NUMA) || PPC32
418 config ARCH_SPARSEMEM_ENABLE
421 select SPARSEMEM_VMEMMAP_ENABLE
423 config ARCH_SPARSEMEM_DEFAULT
425 depends on (SMP && PPC_PSERIES) || PPC_PS3
427 config ARCH_POPULATES_NODE_MAP
430 config SYS_SUPPORTS_HUGETLBFS
432 depends on PPC_BOOK3S_64
436 config ARCH_MEMORY_PROBE
438 depends on MEMORY_HOTPLUG
440 # Some NUMA nodes have memory ranges that span
441 # other nodes. Even though a pfn is valid and
442 # between a node's start and end pfns, it may not
443 # reside on that node. See memmap_init_zone()
445 config NODES_SPAN_OTHER_NODES
447 depends on NEED_MULTIPLE_NODES
449 config PPC_HAS_HASH_64K
455 bool "Using standard binutils settings"
459 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
460 Note, that kernel will be able to run only those applications,
461 which had been compiled using binutils later than 2.17.50.0.3 with
462 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
463 the older binutils, you can patch them with a trivial patch, which
464 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
470 Select the kernel logical page size. Increasing the page size
471 will reduce software overhead at each page boundary, allow
472 hardware prefetch mechanisms to be more effective, and allow
473 larger dma transfers increasing IO efficiency and reducing
474 overhead. However the utilization of memory will increase.
475 For example, each cached file will using a multiple of the
476 page size to hold its contents and the difference between the
477 end of file and the end of page is wasted.
479 Some dedicated systems, such as software raid serving with
480 accelerated calculations, have shown significant increases.
482 If you configure a 64 bit kernel for 64k pages but the
483 processor does not support them, then the kernel will simulate
484 them with 4k pages, loading them on demand, but with the
485 reduced software overhead and larger internal fragmentation.
486 For the 32 bit kernel, a large page option will not be offered
487 unless it is supported by the configured processor.
489 If unsure, choose 4K_PAGES.
495 bool "16k page size" if 44x
498 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
499 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
501 config PPC_256K_PAGES
502 bool "256k page size" if 44x
503 depends on !STDBINUTILS
505 Make the page size 256k.
507 As the ELF standard only requires alignment to support page
508 sizes up to 64k, you will need to compile all of your user
509 space applications with a non-standard binutils settings
510 (see the STDBINUTILS description for details).
512 Say N unless you know what you are doing.
516 config FORCE_MAX_ZONEORDER
517 int "Maximum zone order"
518 range 9 64 if PPC64 && PPC_64K_PAGES
519 default "9" if PPC64 && PPC_64K_PAGES
520 range 13 64 if PPC64 && !PPC_64K_PAGES
521 default "13" if PPC64 && !PPC_64K_PAGES
522 range 9 64 if PPC32 && PPC_16K_PAGES
523 default "9" if PPC32 && PPC_16K_PAGES
524 range 7 64 if PPC32 && PPC_64K_PAGES
525 default "7" if PPC32 && PPC_64K_PAGES
526 range 5 64 if PPC32 && PPC_256K_PAGES
527 default "5" if PPC32 && PPC_256K_PAGES
531 The kernel memory allocator divides physically contiguous memory
532 blocks into "zones", where each zone is a power of two number of
533 pages. This option selects the largest power of two that the kernel
534 keeps in the memory allocator. If you need to allocate very large
535 blocks of physically contiguous memory, then you may need to
538 This config option is actually maximum order plus one. For example,
539 a value of 11 means that the largest free memory block is 2^10 pages.
541 The page size is not necessarily 4KB. For example, on 64-bit
542 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
543 this in mind when choosing a value for this option.
545 config PPC_SUBPAGE_PROT
546 bool "Support setting protections for 4k subpages"
547 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
549 This option adds support for a system call to allow user programs
550 to set access permissions (read/write, readonly, or no access)
551 on the 4k subpages of each 64k page.
554 bool "SMT (Hyperthreading) scheduler support"
555 depends on PPC64 && SMP
557 SMT scheduler support improves the CPU scheduler's decision making
558 when dealing with POWER5 cpus at a cost of slightly increased
559 overhead in some places. If unsure say N here.
562 bool "Default bootloader kernel arguments"
565 string "Initial kernel command string"
566 depends on CMDLINE_BOOL
567 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
569 On some platforms, there is currently no way for the boot loader to
570 pass arguments to the kernel. For these platforms, you can supply
571 some command-line options at build time by entering them here. In
572 most cases you will need to specify the root device here.
575 string "Additional default image types"
577 List additional targets to be built by the bootwrapper here (separated
578 by spaces). This is useful for targets that depend of device tree
579 files in the .dts directory.
581 Targets in this list will be build as part of the default build
582 target, or when the user does a 'make zImage' or a
583 'make zImage.initrd'.
585 If unsure, leave blank
587 config ARCH_WANTS_FREEZER_CONTROL
591 source kernel/power/Kconfig
594 bool "Enable seccomp to safely compute untrusted bytecode"
598 This kernel feature is useful for number crunching applications
599 that may need to compute untrusted bytecode during their
600 execution. By using pipes or other transports made available to
601 the process as file descriptors supporting the read/write
602 syscalls, it's possible to isolate those applications in
603 their own address space using seccomp. Once seccomp is
604 enabled via /proc/<pid>/seccomp, it cannot be disabled
605 and the task is only allowed to execute a few safe syscalls
606 defined by each seccomp mode.
608 If unsure, say Y. Only embedded should say N here.
614 default !PPC_ISERIES || PCI
619 bool "Support for ISA-bus hardware"
620 depends on PPC_PREP || PPC_CHRP
623 Find out whether you have ISA slots on your motherboard. ISA is the
624 name of a bus system, i.e. the way the CPU talks to the other stuff
625 inside your box. If you have an Apple machine, say N here; if you
626 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
627 you have an embedded board, consult your board documentation.
633 config NEED_DMA_MAP_STATE
634 def_bool (PPC64 || NOT_COHERENT_CACHE)
636 config NEED_SG_DMA_LENGTH
639 config GENERIC_ISA_DMA
641 depends on ISA_DMA_API
644 config PPC_INDIRECT_PCI
647 default y if 40x || 44x
661 select PPC_INDIRECT_PCI
667 depends on SUSPEND && (PPC_85xx || PPC_86xx)
669 Freescale MPC85xx/MPC86xx power management controller support
670 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
675 depends on SUSPEND && (44x || 40x)
677 PPC4xx Clock Power Management (CPM) support (suspend/resume).
678 It also enables support for two different idle states (idle-wait
685 bool "Freescale Local Bus support"
688 Enables reporting of errors from the Freescale local bus
689 controller. Also contains some common code used by
690 drivers for specific local bus peripherals.
694 depends on PPC_83xx || QUICC_ENGINE || CPM2
696 Freescale General-purpose Timers support
698 # Yes MCA RS/6000s exist but Linux-PPC does not currently support any
702 # Platforms that what PCI turned unconditionally just do select PCI
703 # in their config node. Platforms that want to choose at config
704 # time should select PPC_PCI_CHOICE
705 config PPC_PCI_CHOICE
709 bool "PCI support" if PPC_PCI_CHOICE
710 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
711 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
712 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
713 default PCI_QSPAN if !4xx && !CPM2 && 8xx
714 select ARCH_SUPPORTS_MSI
716 Find out whether your system includes a PCI bus. PCI is the name of
717 a bus system, i.e. the way the CPU talks to the other stuff inside
718 your box. If you say Y here, the kernel will include drivers and
719 infrastructure code to support PCI bus devices.
729 depends on !4xx && !CPM2 && 8xx
732 Say Y here if you have a system based on a Motorola 8xx-series
733 embedded processor with a QSPAN PCI interface, otherwise say N.
737 depends on PCI && 8260
738 select PPC_INDIRECT_PCI
742 bool "Enable workaround for MPC826x erratum PCI 9"
743 depends on PCI_8260 && !8272
747 prompt "IDMA channel for PCI 9 workaround"
750 config 8260_PCI9_IDMA1
753 config 8260_PCI9_IDMA2
756 config 8260_PCI9_IDMA3
759 config 8260_PCI9_IDMA4
764 source "drivers/pci/pcie/Kconfig"
766 source "drivers/pci/Kconfig"
768 source "drivers/pcmcia/Kconfig"
770 source "drivers/pci/hotplug/Kconfig"
777 bool "RapidIO support"
778 depends on HAS_RAPIDIO || PCI
780 If you say Y here, the kernel will include drivers and
781 infrastructure code to support RapidIO interconnect devices.
784 bool "Freescale Embedded SRIO Controller support"
785 depends on RAPIDIO && HAS_RAPIDIO
788 Include support for RapidIO controller on Freescale embedded
789 processors (MPC8548, MPC8641, etc).
791 source "drivers/rapidio/Kconfig"
795 menu "Advanced setup"
798 config ADVANCED_OPTIONS
799 bool "Prompt for advanced kernel configuration options"
801 This option will enable prompting for a variety of advanced kernel
802 configuration options. These options can cause the kernel to not
803 work if they are set incorrectly, but can be used to optimize certain
804 aspects of kernel memory management.
806 Unless you know what you are doing, say N here.
808 comment "Default settings for advanced configuration options are used"
809 depends on !ADVANCED_OPTIONS
811 config LOWMEM_SIZE_BOOL
812 bool "Set maximum low memory"
813 depends on ADVANCED_OPTIONS
815 This option allows you to set the maximum amount of memory which
816 will be used as "low memory", that is, memory which the kernel can
817 access directly, without having to set up a kernel virtual mapping.
818 This can be useful in optimizing the layout of kernel virtual
821 Say N here unless you know what you are doing.
824 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
827 config LOWMEM_CAM_NUM_BOOL
828 bool "Set number of CAMs to use to map low memory"
829 depends on ADVANCED_OPTIONS && FSL_BOOKE
831 This option allows you to set the maximum number of CAM slots that
832 will be used to map low memory. There are a limited number of slots
833 available and even more limited number that will fit in the L1 MMU.
834 However, using more entries will allow mapping more low memory. This
835 can be useful in optimizing the layout of kernel virtual memory.
837 Say N here unless you know what you are doing.
839 config LOWMEM_CAM_NUM
841 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
845 bool "Build a relocatable kernel (EXPERIMENTAL)"
846 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || PPC_47x)
848 This builds a kernel image that is capable of running at the
849 location the kernel is loaded at (some alignment restrictions may
852 One use is for the kexec on panic case where the recovery kernel
853 must live at a different physical address than the primary
856 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
857 it has been loaded at and the compile time physical addresses
858 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
859 setting can still be useful to bootwrappers that need to know the
860 load location of the kernel (eg. u-boot/mkimage).
862 config PAGE_OFFSET_BOOL
863 bool "Set custom page offset address"
864 depends on ADVANCED_OPTIONS
866 This option allows you to set the kernel virtual address at which
867 the kernel will map low memory. This can be useful in optimizing
868 the virtual memory layout of the system.
870 Say N here unless you know what you are doing.
873 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
876 config KERNEL_START_BOOL
877 bool "Set custom kernel base address"
878 depends on ADVANCED_OPTIONS
880 This option allows you to set the kernel virtual address at which
881 the kernel will be loaded. Normally this should match PAGE_OFFSET
882 however there are times (like kdump) that one might not want them
885 Say N here unless you know what you are doing.
888 hex "Virtual address of kernel base" if KERNEL_START_BOOL
889 default PAGE_OFFSET if PAGE_OFFSET_BOOL
890 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
893 config PHYSICAL_START_BOOL
894 bool "Set physical address where the kernel is loaded"
895 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
897 This gives the physical address where the kernel is loaded.
899 Say N here unless you know what you are doing.
901 config PHYSICAL_START
902 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
903 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
906 config PHYSICAL_ALIGN
908 default "0x04000000" if FSL_BOOKE
910 This value puts the alignment restrictions on physical address
911 where kernel is loaded and run from. Kernel is compiled for an
912 address which meets above alignment restriction.
914 config TASK_SIZE_BOOL
915 bool "Set custom user task size"
916 depends on ADVANCED_OPTIONS
918 This option allows you to set the amount of virtual address space
919 allocated to user tasks. This can be useful in optimizing the
920 virtual memory layout of the system.
922 Say N here unless you know what you are doing.
925 hex "Size of user task space" if TASK_SIZE_BOOL
926 default "0x80000000" if PPC_PREP || PPC_8xx
929 config CONSISTENT_SIZE_BOOL
930 bool "Set custom consistent memory pool size"
931 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
933 This option allows you to set the size of the
934 consistent memory pool. This pool of virtual memory
935 is used to make consistent memory allocations.
937 config CONSISTENT_SIZE
938 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
939 default "0x00200000" if NOT_COHERENT_CACHE
942 bool "Pinned Kernel TLBs (860 ONLY)"
943 depends on ADVANCED_OPTIONS && 8xx
948 bool "Build a relocatable kernel"
950 This builds a kernel image that is capable of running anywhere
951 in the RMA (real memory area) at any 16k-aligned base address.
952 The kernel is linked as a position-independent executable (PIE)
953 and contains dynamic relocations which are processed early
954 in the bootup process.
956 One use is for the kexec on panic case where the recovery kernel
957 must live at a different physical address than the primary
962 default "0xc000000000000000"
965 default "0xc000000000000000"
966 config PHYSICAL_START
973 source "drivers/Kconfig"
977 source "arch/powerpc/sysdev/qe_lib/Kconfig"
981 source "arch/powerpc/Kconfig.debug"
983 source "security/Kconfig"
987 depends on COMPAT && KEYS
990 source "crypto/Kconfig"
1000 source "arch/powerpc/kvm/Kconfig"