hmp: Remove potential for task_struct access race

[firefly-linux-kernel-4.4.55.git] / arch / arm / Kconfig

config ARM
        bool
        default y
        select ARCH_BINFMT_ELF_RANDOMIZE_PIE
        select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
        select ARCH_HAVE_CUSTOM_GPIO_H
        select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
        select ARCH_WANT_IPC_PARSE_VERSION
        select BUILDTIME_EXTABLE_SORT if MMU
        select CPU_PM if (SUSPEND || CPU_IDLE)
        select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
        select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
        select GENERIC_CLOCKEVENTS_BROADCAST if SMP
        select GENERIC_IRQ_PROBE
        select GENERIC_IRQ_SHOW
        select GENERIC_PCI_IOMAP
        select GENERIC_SMP_IDLE_THREAD
        select GENERIC_IDLE_POLL_SETUP
        select GENERIC_STRNCPY_FROM_USER
        select GENERIC_STRNLEN_USER
        select HARDIRQS_SW_RESEND
        select HAVE_AOUT
        select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
        select HAVE_ARCH_KGDB
        select HAVE_ARCH_SECCOMP_FILTER
        select HAVE_ARCH_TRACEHOOK
        select HAVE_BPF_JIT
        select HAVE_C_RECORDMCOUNT
        select HAVE_DEBUG_KMEMLEAK
        select HAVE_DMA_API_DEBUG
        select HAVE_DMA_ATTRS
        select HAVE_DMA_CONTIGUOUS if MMU
        select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
        select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
        select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
        select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
        select HAVE_GENERIC_DMA_COHERENT
        select HAVE_GENERIC_HARDIRQS
        select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
        select HAVE_IDE if PCI || ISA || PCMCIA
        select HAVE_IRQ_TIME_ACCOUNTING
        select HAVE_KERNEL_GZIP
        select HAVE_KERNEL_LZMA
        select HAVE_KERNEL_LZO
        select HAVE_KERNEL_XZ
        select HAVE_KPROBES if !XIP_KERNEL
        select HAVE_KRETPROBES if (HAVE_KPROBES)
        select HAVE_MEMBLOCK
        select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
        select HAVE_PERF_EVENTS
        select HAVE_REGS_AND_STACK_ACCESS_API
        select HAVE_SYSCALL_TRACEPOINTS
        select HAVE_UID16
        select KTIME_SCALAR
        select PERF_USE_VMALLOC
        select RTC_LIB
        select SYS_SUPPORTS_APM_EMULATION
        select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
        select MODULES_USE_ELF_REL
        select CLONE_BACKWARDS
        select OLD_SIGSUSPEND3
        select OLD_SIGACTION
        select HAVE_CONTEXT_TRACKING
        help
          The ARM series is a line of low-power-consumption RISC chip designs
          licensed by ARM Ltd and targeted at embedded applications and
          handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
          manufactured, but legacy ARM-based PC hardware remains popular in
          Europe.  There is an ARM Linux project with a web page at
          <http://www.arm.linux.org.uk/>.

config ARM_HAS_SG_CHAIN
        bool

config NEED_SG_DMA_LENGTH
        bool

config ARM_DMA_USE_IOMMU
        bool
        select ARM_HAS_SG_CHAIN
        select NEED_SG_DMA_LENGTH

if ARM_DMA_USE_IOMMU

config ARM_DMA_IOMMU_ALIGNMENT
        int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
        range 4 9
        default 8
        help
          DMA mapping framework by default aligns all buffers to the smallest
          PAGE_SIZE order which is greater than or equal to the requested buffer
          size. This works well for buffers up to a few hundreds kilobytes, but
          for larger buffers it just a waste of address space. Drivers which has
          relatively small addressing window (like 64Mib) might run out of
          virtual space with just a few allocations.

          With this parameter you can specify the maximum PAGE_SIZE order for
          DMA IOMMU buffers. Larger buffers will be aligned only to this
          specified order. The order is expressed as a power of two multiplied
          by the PAGE_SIZE.

endif

config HAVE_PWM
        bool

config MIGHT_HAVE_PCI
        bool

config SYS_SUPPORTS_APM_EMULATION
        bool

config HAVE_TCM
        bool
        select GENERIC_ALLOCATOR

config HAVE_PROC_CPU
        bool

config NO_IOPORT
        bool

config EISA
        bool
        ---help---
          The Extended Industry Standard Architecture (EISA) bus was
          developed as an open alternative to the IBM MicroChannel bus.

          The EISA bus provided some of the features of the IBM MicroChannel
          bus while maintaining backward compatibility with cards made for
          the older ISA bus.  The EISA bus saw limited use between 1988 and
          1995 when it was made obsolete by the PCI bus.

          Say Y here if you are building a kernel for an EISA-based machine.

          Otherwise, say N.

config SBUS
        bool

config STACKTRACE_SUPPORT
        bool
        default y

config HAVE_LATENCYTOP_SUPPORT
        bool
        depends on !SMP
        default y

config LOCKDEP_SUPPORT
        bool
        default y

config TRACE_IRQFLAGS_SUPPORT
        bool
        default y

config RWSEM_GENERIC_SPINLOCK
        bool
        default y

config RWSEM_XCHGADD_ALGORITHM
        bool

config ARCH_HAS_ILOG2_U32
        bool

config ARCH_HAS_ILOG2_U64
        bool

config ARCH_HAS_CPUFREQ
        bool
        help
          Internal node to signify that the ARCH has CPUFREQ support
          and that the relevant menu configurations are displayed for
          it.

config GENERIC_HWEIGHT
        bool
        default y

config GENERIC_CALIBRATE_DELAY
        bool
        default y

config ARCH_MAY_HAVE_PC_FDC
        bool

config ZONE_DMA
        bool

config NEED_DMA_MAP_STATE
       def_bool y

config ARCH_HAS_DMA_SET_COHERENT_MASK
        bool

config GENERIC_ISA_DMA
        bool

config FIQ
        bool

config NEED_RET_TO_USER
        bool

config ARCH_MTD_XIP
        bool

config VECTORS_BASE
        hex
        default 0xffff0000 if MMU || CPU_HIGH_VECTOR
        default DRAM_BASE if REMAP_VECTORS_TO_RAM
        default 0x00000000
        help
          The base address of exception vectors.

config ARM_PATCH_PHYS_VIRT
        bool "Patch physical to virtual translations at runtime" if EMBEDDED
        default y
        depends on !XIP_KERNEL && MMU
        depends on !ARCH_REALVIEW || !SPARSEMEM
        help
          Patch phys-to-virt and virt-to-phys translation functions at
          boot and module load time according to the position of the
          kernel in system memory.

          This can only be used with non-XIP MMU kernels where the base
          of physical memory is at a 16MB boundary.

          Only disable this option if you know that you do not require
          this feature (eg, building a kernel for a single machine) and
          you need to shrink the kernel to the minimal size.

config NEED_MACH_GPIO_H
        bool
        help
          Select this when mach/gpio.h is required to provide special
          definitions for this platform. The need for mach/gpio.h should
          be avoided when possible.

config NEED_MACH_IO_H
        bool
        help
          Select this when mach/io.h is required to provide special
          definitions for this platform.  The need for mach/io.h should
          be avoided when possible.

config NEED_MACH_MEMORY_H
        bool
        help
          Select this when mach/memory.h is required to provide special
          definitions for this platform.  The need for mach/memory.h should
          be avoided when possible.

config PHYS_OFFSET
        hex "Physical address of main memory" if MMU
        depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
        default DRAM_BASE if !MMU
        help
          Please provide the physical address corresponding to the
          location of main memory in your system.

config GENERIC_BUG
        def_bool y
        depends on BUG

source "init/Kconfig"

source "kernel/Kconfig.freezer"

menu "System Type"

config MMU
        bool "MMU-based Paged Memory Management Support"
        default y
        help
          Select if you want MMU-based virtualised addressing space
          support by paged memory management. If unsure, say 'Y'.

#
# The "ARM system type" choice list is ordered alphabetically by option
# text.  Please add new entries in the option alphabetic order.
#
choice
        prompt "ARM system type"
        default ARCH_VERSATILE if !MMU
        default ARCH_MULTIPLATFORM if MMU

config ARCH_MULTIPLATFORM
        bool "Allow multiple platforms to be selected"
        depends on MMU
        select ARM_PATCH_PHYS_VIRT
        select AUTO_ZRELADDR
        select COMMON_CLK
        select MULTI_IRQ_HANDLER
        select SPARSE_IRQ
        select USE_OF

config ARCH_INTEGRATOR
        bool "ARM Ltd. Integrator family"
        select ARCH_HAS_CPUFREQ
        select ARM_AMBA
        select COMMON_CLK
        select COMMON_CLK_VERSATILE
        select GENERIC_CLOCKEVENTS
        select HAVE_TCM
        select ICST
        select MULTI_IRQ_HANDLER
        select NEED_MACH_MEMORY_H
        select PLAT_VERSATILE
        select SPARSE_IRQ
        select VERSATILE_FPGA_IRQ
        help
          Support for ARM's Integrator platform.

config ARCH_REALVIEW
        bool "ARM Ltd. RealView family"
        select ARCH_WANT_OPTIONAL_GPIOLIB
        select ARM_AMBA
        select ARM_TIMER_SP804
        select COMMON_CLK
        select COMMON_CLK_VERSATILE
        select GENERIC_CLOCKEVENTS
        select GPIO_PL061 if GPIOLIB
        select ICST
        select NEED_MACH_MEMORY_H
        select PLAT_VERSATILE
        select PLAT_VERSATILE_CLCD
        help
          This enables support for ARM Ltd RealView boards.

config ARCH_VERSATILE
        bool "ARM Ltd. Versatile family"
        select ARCH_WANT_OPTIONAL_GPIOLIB
        select ARM_AMBA
        select ARM_TIMER_SP804
        select ARM_VIC
        select CLKDEV_LOOKUP
        select GENERIC_CLOCKEVENTS
        select HAVE_MACH_CLKDEV
        select ICST
        select PLAT_VERSATILE
        select PLAT_VERSATILE_CLCD
        select PLAT_VERSATILE_CLOCK
        select VERSATILE_FPGA_IRQ
        help
          This enables support for ARM Ltd Versatile board.

config ARCH_AT91
        bool "Atmel AT91"
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select HAVE_CLK
        select IRQ_DOMAIN
        select NEED_MACH_GPIO_H
        select NEED_MACH_IO_H if PCCARD
        select PINCTRL
        select PINCTRL_AT91 if USE_OF
        help
          This enables support for systems based on Atmel
          AT91RM9200 and AT91SAM9* processors.

config ARCH_CLPS711X
        bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
        select ARCH_REQUIRE_GPIOLIB
        select AUTO_ZRELADDR
        select CLKDEV_LOOKUP
        select COMMON_CLK
        select CPU_ARM720T
        select GENERIC_CLOCKEVENTS
        select MULTI_IRQ_HANDLER
        select NEED_MACH_MEMORY_H
        select SPARSE_IRQ
        help
          Support for Cirrus Logic 711x/721x/731x based boards.

config ARCH_GEMINI
        bool "Cortina Systems Gemini"
        select ARCH_REQUIRE_GPIOLIB
        select ARCH_USES_GETTIMEOFFSET
        select NEED_MACH_GPIO_H
        select CPU_FA526
        help
          Support for the Cortina Systems Gemini family SoCs

config ARCH_EBSA110
        bool "EBSA-110"
        select ARCH_USES_GETTIMEOFFSET
        select CPU_SA110
        select ISA
        select NEED_MACH_IO_H
        select NEED_MACH_MEMORY_H
        select NO_IOPORT
        help
          This is an evaluation board for the StrongARM processor available
          from Digital. It has limited hardware on-board, including an
          Ethernet interface, two PCMCIA sockets, two serial ports and a
          parallel port.

config ARCH_EP93XX
        bool "EP93xx-based"
        select ARCH_HAS_HOLES_MEMORYMODEL
        select ARCH_REQUIRE_GPIOLIB
        select ARCH_USES_GETTIMEOFFSET
        select ARM_AMBA
        select ARM_VIC
        select CLKDEV_LOOKUP
        select CPU_ARM920T
        select NEED_MACH_MEMORY_H
        help
          This enables support for the Cirrus EP93xx series of CPUs.

config ARCH_FOOTBRIDGE
        bool "FootBridge"
        select CPU_SA110
        select FOOTBRIDGE
        select GENERIC_CLOCKEVENTS
        select HAVE_IDE
        select NEED_MACH_IO_H if !MMU
        select NEED_MACH_MEMORY_H
        help
          Support for systems based on the DC21285 companion chip
          ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.

config ARCH_NETX
        bool "Hilscher NetX based"
        select ARM_VIC
        select CLKSRC_MMIO
        select CPU_ARM926T
        select GENERIC_CLOCKEVENTS
        help
          This enables support for systems based on the Hilscher NetX Soc

config ARCH_IOP13XX
        bool "IOP13xx-based"
        depends on MMU
        select ARCH_SUPPORTS_MSI
        select CPU_XSC3
        select NEED_MACH_MEMORY_H
        select NEED_RET_TO_USER
        select PCI
        select PLAT_IOP
        select VMSPLIT_1G
        help
          Support for Intel's IOP13XX (XScale) family of processors.

config ARCH_IOP32X
        bool "IOP32x-based"
        depends on MMU
        select ARCH_REQUIRE_GPIOLIB
        select CPU_XSCALE
        select NEED_MACH_GPIO_H
        select NEED_RET_TO_USER
        select PCI
        select PLAT_IOP
        help
          Support for Intel's 80219 and IOP32X (XScale) family of
          processors.

config ARCH_IOP33X
        bool "IOP33x-based"
        depends on MMU
        select ARCH_REQUIRE_GPIOLIB
        select CPU_XSCALE
        select NEED_MACH_GPIO_H
        select NEED_RET_TO_USER
        select PCI
        select PLAT_IOP
        help
          Support for Intel's IOP33X (XScale) family of processors.

config ARCH_IXP4XX
        bool "IXP4xx-based"
        depends on MMU
        select ARCH_HAS_DMA_SET_COHERENT_MASK
        select ARCH_REQUIRE_GPIOLIB
        select CLKSRC_MMIO
        select CPU_XSCALE
        select DMABOUNCE if PCI
        select GENERIC_CLOCKEVENTS
        select MIGHT_HAVE_PCI
        select NEED_MACH_IO_H
        select USB_EHCI_BIG_ENDIAN_MMIO
        select USB_EHCI_BIG_ENDIAN_DESC
        help
          Support for Intel's IXP4XX (XScale) family of processors.

config ARCH_DOVE
        bool "Marvell Dove"
        select ARCH_REQUIRE_GPIOLIB
        select CPU_PJ4
        select GENERIC_CLOCKEVENTS
        select MIGHT_HAVE_PCI
        select PINCTRL
        select PINCTRL_DOVE
        select PLAT_ORION_LEGACY
        select USB_ARCH_HAS_EHCI
        select MVEBU_MBUS
        help
          Support for the Marvell Dove SoC 88AP510

config ARCH_KIRKWOOD
        bool "Marvell Kirkwood"
        select ARCH_REQUIRE_GPIOLIB
        select CPU_FEROCEON
        select GENERIC_CLOCKEVENTS
        select PCI
        select PCI_QUIRKS
        select PINCTRL
        select PINCTRL_KIRKWOOD
        select PLAT_ORION_LEGACY
        select MVEBU_MBUS
        help
          Support for the following Marvell Kirkwood series SoCs:
          88F6180, 88F6192 and 88F6281.

config ARCH_MV78XX0
        bool "Marvell MV78xx0"
        select ARCH_REQUIRE_GPIOLIB
        select CPU_FEROCEON
        select GENERIC_CLOCKEVENTS
        select PCI
        select PLAT_ORION_LEGACY
        select MVEBU_MBUS
        help
          Support for the following Marvell MV78xx0 series SoCs:
          MV781x0, MV782x0.

config ARCH_ORION5X
        bool "Marvell Orion"
        depends on MMU
        select ARCH_REQUIRE_GPIOLIB
        select CPU_FEROCEON
        select GENERIC_CLOCKEVENTS
        select PCI
        select PLAT_ORION_LEGACY
        select MVEBU_MBUS
        help
          Support for the following Marvell Orion 5x series SoCs:
          Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
          Orion-2 (5281), Orion-1-90 (6183).

config ARCH_MMP
        bool "Marvell PXA168/910/MMP2"
        depends on MMU
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select GENERIC_ALLOCATOR
        select GENERIC_CLOCKEVENTS
        select GPIO_PXA
        select IRQ_DOMAIN
        select NEED_MACH_GPIO_H
        select PINCTRL
        select PLAT_PXA
        select SPARSE_IRQ
        help
          Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.

config ARCH_KS8695
        bool "Micrel/Kendin KS8695"
        select ARCH_REQUIRE_GPIOLIB
        select CLKSRC_MMIO
        select CPU_ARM922T
        select GENERIC_CLOCKEVENTS
        select NEED_MACH_MEMORY_H
        help
          Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
          System-on-Chip devices.

config ARCH_W90X900
        bool "Nuvoton W90X900 CPU"
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select CPU_ARM926T
        select GENERIC_CLOCKEVENTS
        help
          Support for Nuvoton (Winbond logic dept.) ARM9 processor,
          At present, the w90x900 has been renamed nuc900, regarding
          the ARM series product line, you can login the following
          link address to know more.

          <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
                ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>

config ARCH_LPC32XX
        bool "NXP LPC32XX"
        select ARCH_REQUIRE_GPIOLIB
        select ARM_AMBA
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select CPU_ARM926T
        select GENERIC_CLOCKEVENTS
        select HAVE_IDE
        select HAVE_PWM
        select USB_ARCH_HAS_OHCI
        select USE_OF
        help
          Support for the NXP LPC32XX family of processors

config ARCH_PXA
        bool "PXA2xx/PXA3xx-based"
        depends on MMU
        select ARCH_HAS_CPUFREQ
        select ARCH_MTD_XIP
        select ARCH_REQUIRE_GPIOLIB
        select ARM_CPU_SUSPEND if PM
        select AUTO_ZRELADDR
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select GENERIC_CLOCKEVENTS
        select GPIO_PXA
        select HAVE_IDE
        select MULTI_IRQ_HANDLER
        select NEED_MACH_GPIO_H
        select PLAT_PXA
        select SPARSE_IRQ
        help
          Support for Intel/Marvell's PXA2xx/PXA3xx processor line.

config ARCH_MSM
        bool "Qualcomm MSM"
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        help
          Support for Qualcomm MSM/QSD based systems.  This runs on the
          apps processor of the MSM/QSD and depends on a shared memory
          interface to the modem processor which runs the baseband
          stack and controls some vital subsystems
          (clock and power control, etc).

config ARCH_SHMOBILE
        bool "Renesas SH-Mobile / R-Mobile"
        select CLKDEV_LOOKUP
        select GENERIC_CLOCKEVENTS
        select HAVE_ARM_SCU if SMP
        select HAVE_ARM_TWD if LOCAL_TIMERS
        select HAVE_CLK
        select HAVE_MACH_CLKDEV
        select HAVE_SMP
        select MIGHT_HAVE_CACHE_L2X0
        select MULTI_IRQ_HANDLER
        select NEED_MACH_MEMORY_H
        select NO_IOPORT
        select PINCTRL if ARCH_WANT_OPTIONAL_GPIOLIB
        select PM_GENERIC_DOMAINS if PM
        select SPARSE_IRQ
        help
          Support for Renesas's SH-Mobile and R-Mobile ARM platforms.

config ARCH_RPC
        bool "RiscPC"
        select ARCH_ACORN
        select ARCH_MAY_HAVE_PC_FDC
        select ARCH_SPARSEMEM_ENABLE
        select ARCH_USES_GETTIMEOFFSET
        select FIQ
        select HAVE_IDE
        select HAVE_PATA_PLATFORM
        select ISA_DMA_API
        select NEED_MACH_IO_H
        select NEED_MACH_MEMORY_H
        select NO_IOPORT
        select VIRT_TO_BUS
        help
          On the Acorn Risc-PC, Linux can support the internal IDE disk and
          CD-ROM interface, serial and parallel port, and the floppy drive.

config ARCH_SA1100
        bool "SA1100-based"
        select ARCH_HAS_CPUFREQ
        select ARCH_MTD_XIP
        select ARCH_REQUIRE_GPIOLIB
        select ARCH_SPARSEMEM_ENABLE
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select CPU_FREQ
        select CPU_SA1100
        select GENERIC_CLOCKEVENTS
        select HAVE_IDE
        select ISA
        select NEED_MACH_GPIO_H
        select NEED_MACH_MEMORY_H
        select SPARSE_IRQ
        help
          Support for StrongARM 11x0 based boards.

config ARCH_S3C24XX
        bool "Samsung S3C24XX SoCs"
        select ARCH_HAS_CPUFREQ
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        select HAVE_S3C2410_I2C if I2C
        select HAVE_S3C2410_WATCHDOG if WATCHDOG
        select HAVE_S3C_RTC if RTC_CLASS
        select MULTI_IRQ_HANDLER
        select NEED_MACH_GPIO_H
        select NEED_MACH_IO_H
        help
          Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
          and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
          (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
          Samsung SMDK2410 development board (and derivatives).

config ARCH_S3C64XX
        bool "Samsung S3C64XX"
        select ARCH_HAS_CPUFREQ
        select ARCH_REQUIRE_GPIOLIB
        select ARM_VIC
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select CPU_V6
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        select HAVE_S3C2410_I2C if I2C
        select HAVE_S3C2410_WATCHDOG if WATCHDOG
        select HAVE_TCM
        select NEED_MACH_GPIO_H
        select NO_IOPORT
        select PLAT_SAMSUNG
        select S3C_DEV_NAND
        select S3C_GPIO_TRACK
        select SAMSUNG_CLKSRC
        select SAMSUNG_GPIOLIB_4BIT
        select SAMSUNG_IRQ_VIC_TIMER
        select USB_ARCH_HAS_OHCI
        help
          Samsung S3C64XX series based systems

config ARCH_S5P64X0
        bool "Samsung S5P6440 S5P6450"
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select CPU_V6
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        select HAVE_S3C2410_I2C if I2C
        select HAVE_S3C2410_WATCHDOG if WATCHDOG
        select HAVE_S3C_RTC if RTC_CLASS
        select NEED_MACH_GPIO_H
        help
          Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
          SMDK6450.

config ARCH_S5PC100
        bool "Samsung S5PC100"
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select CPU_V7
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        select HAVE_S3C2410_I2C if I2C
        select HAVE_S3C2410_WATCHDOG if WATCHDOG
        select HAVE_S3C_RTC if RTC_CLASS
        select NEED_MACH_GPIO_H
        help
          Samsung S5PC100 series based systems

config ARCH_S5PV210
        bool "Samsung S5PV210/S5PC110"
        select ARCH_HAS_CPUFREQ
        select ARCH_HAS_HOLES_MEMORYMODEL
        select ARCH_SPARSEMEM_ENABLE
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select CPU_V7
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        select HAVE_S3C2410_I2C if I2C
        select HAVE_S3C2410_WATCHDOG if WATCHDOG
        select HAVE_S3C_RTC if RTC_CLASS
        select NEED_MACH_GPIO_H
        select NEED_MACH_MEMORY_H
        help
          Samsung S5PV210/S5PC110 series based systems

config ARCH_EXYNOS
        bool "Samsung EXYNOS"
        select ARCH_HAS_CPUFREQ
        select ARCH_HAS_HOLES_MEMORYMODEL
        select ARCH_SPARSEMEM_ENABLE
        select CLKDEV_LOOKUP
        select COMMON_CLK
        select CPU_V7
        select GENERIC_CLOCKEVENTS
        select HAVE_CLK
        select HAVE_S3C2410_I2C if I2C
        select HAVE_S3C2410_WATCHDOG if WATCHDOG
        select HAVE_S3C_RTC if RTC_CLASS
        select NEED_MACH_GPIO_H
        select NEED_MACH_MEMORY_H
        help
          Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)

config ARCH_SHARK
        bool "Shark"
        select ARCH_USES_GETTIMEOFFSET
        select CPU_SA110
        select ISA
        select ISA_DMA
        select NEED_MACH_MEMORY_H
        select PCI
        select VIRT_TO_BUS
        select ZONE_DMA
        help
          Support for the StrongARM based Digital DNARD machine, also known
          as "Shark" (<http://www.shark-linux.de/shark.html>).

config ARCH_U300
        bool "ST-Ericsson U300 Series"
        depends on MMU
        select ARCH_REQUIRE_GPIOLIB
        select ARM_AMBA
        select ARM_PATCH_PHYS_VIRT
        select ARM_VIC
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select COMMON_CLK
        select CPU_ARM926T
        select GENERIC_CLOCKEVENTS
        select HAVE_TCM
        select SPARSE_IRQ
        help
          Support for ST-Ericsson U300 series mobile platforms.

config ARCH_DAVINCI
        bool "TI DaVinci"
        select ARCH_HAS_HOLES_MEMORYMODEL
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select GENERIC_ALLOCATOR
        select GENERIC_CLOCKEVENTS
        select GENERIC_IRQ_CHIP
        select HAVE_IDE
        select NEED_MACH_GPIO_H
        select USE_OF
        select ZONE_DMA
        help
          Support for TI's DaVinci platform.

config ARCH_OMAP1
        bool "TI OMAP1"
        depends on MMU
        select ARCH_HAS_CPUFREQ
        select ARCH_HAS_HOLES_MEMORYMODEL
        select ARCH_OMAP
        select ARCH_REQUIRE_GPIOLIB
        select CLKDEV_LOOKUP
        select CLKSRC_MMIO
        select GENERIC_CLOCKEVENTS
        select GENERIC_IRQ_CHIP
        select HAVE_CLK
        select HAVE_IDE
        select IRQ_DOMAIN
        select NEED_MACH_IO_H if PCCARD
        select NEED_MACH_MEMORY_H
        help
          Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)

endchoice

menu "Multiple platform selection"
        depends on ARCH_MULTIPLATFORM

comment "CPU Core family selection"

config ARCH_MULTI_V4
        bool "ARMv4 based platforms (FA526, StrongARM)"
        depends on !ARCH_MULTI_V6_V7
        select ARCH_MULTI_V4_V5

config ARCH_MULTI_V4T
        bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
        depends on !ARCH_MULTI_V6_V7
        select ARCH_MULTI_V4_V5

config ARCH_MULTI_V5
        bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
        depends on !ARCH_MULTI_V6_V7
        select ARCH_MULTI_V4_V5

config ARCH_MULTI_V4_V5
        bool

config ARCH_MULTI_V6
        bool "ARMv6 based platforms (ARM11)"
        select ARCH_MULTI_V6_V7
        select CPU_V6

config ARCH_MULTI_V7
        bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
        default y
        select ARCH_MULTI_V6_V7
        select CPU_V7

config ARCH_MULTI_V6_V7
        bool

config ARCH_MULTI_CPU_AUTO
        def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
        select ARCH_MULTI_V5

endmenu

#
# This is sorted alphabetically by mach-* pathname.  However, plat-*
# Kconfigs may be included either alphabetically (according to the
# plat- suffix) or along side the corresponding mach-* source.
#
source "arch/arm/mach-mvebu/Kconfig"

source "arch/arm/mach-at91/Kconfig"

source "arch/arm/mach-bcm/Kconfig"

source "arch/arm/mach-bcm2835/Kconfig"

source "arch/arm/mach-clps711x/Kconfig"

source "arch/arm/mach-cns3xxx/Kconfig"

source "arch/arm/mach-davinci/Kconfig"

source "arch/arm/mach-dove/Kconfig"

source "arch/arm/mach-ep93xx/Kconfig"

source "arch/arm/mach-footbridge/Kconfig"

source "arch/arm/mach-gemini/Kconfig"

source "arch/arm/mach-highbank/Kconfig"

source "arch/arm/mach-integrator/Kconfig"

source "arch/arm/mach-iop32x/Kconfig"

source "arch/arm/mach-iop33x/Kconfig"

source "arch/arm/mach-iop13xx/Kconfig"

source "arch/arm/mach-ixp4xx/Kconfig"

source "arch/arm/mach-kirkwood/Kconfig"

source "arch/arm/mach-ks8695/Kconfig"

source "arch/arm/mach-msm/Kconfig"

source "arch/arm/mach-mv78xx0/Kconfig"

source "arch/arm/mach-imx/Kconfig"

source "arch/arm/mach-mxs/Kconfig"

source "arch/arm/mach-netx/Kconfig"

source "arch/arm/mach-nomadik/Kconfig"

source "arch/arm/plat-omap/Kconfig"

source "arch/arm/mach-omap1/Kconfig"

source "arch/arm/mach-omap2/Kconfig"

source "arch/arm/mach-orion5x/Kconfig"

source "arch/arm/mach-picoxcell/Kconfig"

source "arch/arm/mach-pxa/Kconfig"
source "arch/arm/plat-pxa/Kconfig"

source "arch/arm/mach-mmp/Kconfig"

source "arch/arm/mach-realview/Kconfig"

source "arch/arm/mach-sa1100/Kconfig"

source "arch/arm/plat-samsung/Kconfig"

source "arch/arm/mach-socfpga/Kconfig"

source "arch/arm/mach-spear/Kconfig"

source "arch/arm/mach-s3c24xx/Kconfig"

if ARCH_S3C64XX
source "arch/arm/mach-s3c64xx/Kconfig"
endif

source "arch/arm/mach-s5p64x0/Kconfig"

source "arch/arm/mach-s5pc100/Kconfig"

source "arch/arm/mach-s5pv210/Kconfig"

source "arch/arm/mach-exynos/Kconfig"

source "arch/arm/mach-shmobile/Kconfig"

source "arch/arm/mach-sunxi/Kconfig"

source "arch/arm/mach-prima2/Kconfig"

source "arch/arm/mach-tegra/Kconfig"

source "arch/arm/mach-u300/Kconfig"

source "arch/arm/mach-ux500/Kconfig"

source "arch/arm/mach-versatile/Kconfig"

source "arch/arm/mach-vexpress/Kconfig"
source "arch/arm/plat-versatile/Kconfig"

source "arch/arm/mach-virt/Kconfig"

source "arch/arm/mach-vt8500/Kconfig"

source "arch/arm/mach-w90x900/Kconfig"

source "arch/arm/mach-zynq/Kconfig"

# Definitions to make life easier
config ARCH_ACORN
        bool

config PLAT_IOP
        bool
        select GENERIC_CLOCKEVENTS

config PLAT_ORION
        bool
        select CLKSRC_MMIO
        select COMMON_CLK
        select GENERIC_IRQ_CHIP
        select IRQ_DOMAIN

config PLAT_ORION_LEGACY
        bool
        select PLAT_ORION

config PLAT_PXA
        bool

config PLAT_VERSATILE
        bool

config ARM_TIMER_SP804
        bool
        select CLKSRC_MMIO
        select CLKSRC_OF if OF

source arch/arm/mm/Kconfig

config ARM_NR_BANKS
        int
        default 16 if ARCH_EP93XX
        default 8

config IWMMXT
        bool "Enable iWMMXt support" if !CPU_PJ4
        depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
        default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
        help
          Enable support for iWMMXt context switching at run time if
          running on a CPU that supports it.

config XSCALE_PMU
        bool
        depends on CPU_XSCALE
        default y

config MULTI_IRQ_HANDLER
        bool
        help
          Allow each machine to specify it's own IRQ handler at run time.

if !MMU
source "arch/arm/Kconfig-nommu"
endif

config PJ4B_ERRATA_4742
        bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
        depends on CPU_PJ4B && MACH_ARMADA_370
        default y
        help
          When coming out of either a Wait for Interrupt (WFI) or a Wait for
          Event (WFE) IDLE states, a specific timing sensitivity exists between
          the retiring WFI/WFE instructions and the newly issued subsequent
          instructions.  This sensitivity can result in a CPU hang scenario.
          Workaround:
          The software must insert either a Data Synchronization Barrier (DSB)
          or Data Memory Barrier (DMB) command immediately after the WFI/WFE
          instruction

config ARM_ERRATA_326103
        bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
        depends on CPU_V6
        help
          Executing a SWP instruction to read-only memory does not set bit 11
          of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
          treat the access as a read, preventing a COW from occurring and
          causing the faulting task to livelock.

config ARM_ERRATA_411920
        bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
        depends on CPU_V6 || CPU_V6K
        help
          Invalidation of the Instruction Cache operation can
          fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
          It does not affect the MPCore. This option enables the ARM Ltd.
          recommended workaround.

config ARM_ERRATA_430973
        bool "ARM errata: Stale prediction on replaced interworking branch"
        depends on CPU_V7
        help
          This option enables the workaround for the 430973 Cortex-A8
          (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
          interworking branch is replaced with another code sequence at the
          same virtual address, whether due to self-modifying code or virtual
          to physical address re-mapping, Cortex-A8 does not recover from the
          stale interworking branch prediction. This results in Cortex-A8
          executing the new code sequence in the incorrect ARM or Thumb state.
          The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
          and also flushes the branch target cache at every context switch.
          Note that setting specific bits in the ACTLR register may not be
          available in non-secure mode.

config ARM_ERRATA_458693
        bool "ARM errata: Processor deadlock when a false hazard is created"
        depends on CPU_V7
        depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 458693 Cortex-A8 (r2p0)
          erratum. For very specific sequences of memory operations, it is
          possible for a hazard condition intended for a cache line to instead
          be incorrectly associated with a different cache line. This false
          hazard might then cause a processor deadlock. The workaround enables
          the L1 caching of the NEON accesses and disables the PLD instruction
          in the ACTLR register. Note that setting specific bits in the ACTLR
          register may not be available in non-secure mode.

config ARM_ERRATA_460075
        bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
        depends on CPU_V7
        depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 460075 Cortex-A8 (r2p0)
          erratum. Any asynchronous access to the L2 cache may encounter a
          situation in which recent store transactions to the L2 cache are lost
          and overwritten with stale memory contents from external memory. The
          workaround disables the write-allocate mode for the L2 cache via the
          ACTLR register. Note that setting specific bits in the ACTLR register
          may not be available in non-secure mode.

config ARM_ERRATA_742230
        bool "ARM errata: DMB operation may be faulty"
        depends on CPU_V7 && SMP
        depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 742230 Cortex-A9
          (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
          between two write operations may not ensure the correct visibility
          ordering of the two writes. This workaround sets a specific bit in
          the diagnostic register of the Cortex-A9 which causes the DMB
          instruction to behave as a DSB, ensuring the correct behaviour of
          the two writes.

config ARM_ERRATA_742231
        bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
        depends on CPU_V7 && SMP
        depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 742231 Cortex-A9
          (r2p0..r2p2) erratum. Under certain conditions, specific to the
          Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
          accessing some data located in the same cache line, may get corrupted
          data due to bad handling of the address hazard when the line gets
          replaced from one of the CPUs at the same time as another CPU is
          accessing it. This workaround sets specific bits in the diagnostic
          register of the Cortex-A9 which reduces the linefill issuing
          capabilities of the processor.

config PL310_ERRATA_588369
        bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
        depends on CACHE_L2X0
        help
           The PL310 L2 cache controller implements three types of Clean &
           Invalidate maintenance operations: by Physical Address
           (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
           They are architecturally defined to behave as the execution of a
           clean operation followed immediately by an invalidate operation,
           both performing to the same memory location. This functionality
           is not correctly implemented in PL310 as clean lines are not
           invalidated as a result of these operations.

config ARM_ERRATA_643719
        bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
        depends on CPU_V7 && SMP
        help
          This option enables the workaround for the 643719 Cortex-A9 (prior to
          r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
          register returns zero when it should return one. The workaround
          corrects this value, ensuring cache maintenance operations which use
          it behave as intended and avoiding data corruption.

config ARM_ERRATA_720789
        bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
        depends on CPU_V7
        help
          This option enables the workaround for the 720789 Cortex-A9 (prior to
          r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
          broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
          As a consequence of this erratum, some TLB entries which should be
          invalidated are not, resulting in an incoherency in the system page
          tables. The workaround changes the TLB flushing routines to invalidate
          entries regardless of the ASID.

config PL310_ERRATA_727915
        bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
        depends on CACHE_L2X0
        help
          PL310 implements the Clean & Invalidate by Way L2 cache maintenance
          operation (offset 0x7FC). This operation runs in background so that
          PL310 can handle normal accesses while it is in progress. Under very
          rare circumstances, due to this erratum, write data can be lost when
          PL310 treats a cacheable write transaction during a Clean &
          Invalidate by Way operation.

config ARM_ERRATA_743622
        bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
        depends on CPU_V7
        depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 743622 Cortex-A9
          (r2p*) erratum. Under very rare conditions, a faulty
          optimisation in the Cortex-A9 Store Buffer may lead to data
          corruption. This workaround sets a specific bit in the diagnostic
          register of the Cortex-A9 which disables the Store Buffer
          optimisation, preventing the defect from occurring. This has no
          visible impact on the overall performance or power consumption of the
          processor.

config ARM_ERRATA_751472
        bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
        depends on CPU_V7
        depends on !ARCH_MULTIPLATFORM
        help
          This option enables the workaround for the 751472 Cortex-A9 (prior
          to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
          completion of a following broadcasted operation if the second
          operation is received by a CPU before the ICIALLUIS has completed,
          potentially leading to corrupted entries in the cache or TLB.

config PL310_ERRATA_753970
        bool "PL310 errata: cache sync operation may be faulty"
        depends on CACHE_PL310
        help
          This option enables the workaround for the 753970 PL310 (r3p0) erratum.

          Under some condition the effect of cache sync operation on
          the store buffer still remains when the operation completes.
          This means that the store buffer is always asked to drain and
          this prevents it from merging any further writes. The workaround
          is to replace the normal offset of cache sync operation (0x730)
          by another offset targeting an unmapped PL310 register 0x740.
          This has the same effect as the cache sync operation: store buffer
          drain and waiting for all buffers empty.

config ARM_ERRATA_754322
        bool "ARM errata: possible faulty MMU translations following an ASID switch"
        depends on CPU_V7
        help
          This option enables the workaround for the 754322 Cortex-A9 (r2p*,
          r3p*) erratum. A speculative memory access may cause a page table walk
          which starts prior to an ASID switch but completes afterwards. This
          can populate the micro-TLB with a stale entry which may be hit with
          the new ASID. This workaround places two dsb instructions in the mm
          switching code so that no page table walks can cross the ASID switch.

config ARM_ERRATA_754327
        bool "ARM errata: no automatic Store Buffer drain"
        depends on CPU_V7 && SMP
        help
          This option enables the workaround for the 754327 Cortex-A9 (prior to
          r2p0) erratum. The Store Buffer does not have any automatic draining
          mechanism and therefore a livelock may occur if an external agent
          continuously polls a memory location waiting to observe an update.
          This workaround defines cpu_relax() as smp_mb(), preventing correctly
          written polling loops from denying visibility of updates to memory.

config ARM_ERRATA_364296
        bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
        depends on CPU_V6 && !SMP
        help
          This options enables the workaround for the 364296 ARM1136
          r0p2 erratum (possible cache data corruption with
          hit-under-miss enabled). It sets the undocumented bit 31 in
          the auxiliary control register and the FI bit in the control
          register, thus disabling hit-under-miss without putting the
          processor into full low interrupt latency mode. ARM11MPCore
          is not affected.

config ARM_ERRATA_764369
        bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
        depends on CPU_V7 && SMP
        help
          This option enables the workaround for erratum 764369
          affecting Cortex-A9 MPCore with two or more processors (all
          current revisions). Under certain timing circumstances, a data
          cache line maintenance operation by MVA targeting an Inner
          Shareable memory region may fail to proceed up to either the
          Point of Coherency or to the Point of Unification of the
          system. This workaround adds a DSB instruction before the
          relevant cache maintenance functions and sets a specific bit
          in the diagnostic control register of the SCU.

config PL310_ERRATA_769419
        bool "PL310 errata: no automatic Store Buffer drain"
        depends on CACHE_L2X0
        help
          On revisions of the PL310 prior to r3p2, the Store Buffer does
          not automatically drain. This can cause normal, non-cacheable
          writes to be retained when the memory system is idle, leading
          to suboptimal I/O performance for drivers using coherent DMA.
          This option adds a write barrier to the cpu_idle loop so that,
          on systems with an outer cache, the store buffer is drained
          explicitly.

config ARM_ERRATA_775420
       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
       depends on CPU_V7
       help
         This option enables the workaround for the 775420 Cortex-A9 (r2p2,
         r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
         operation aborts with MMU exception, it might cause the processor
         to deadlock. This workaround puts DSB before executing ISB if
         an abort may occur on cache maintenance.

config ARM_ERRATA_798181
        bool "ARM errata: TLBI/DSB failure on Cortex-A15"
        depends on CPU_V7 && SMP
        help
          On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
          adequately shooting down all use of the old entries. This
          option enables the Linux kernel workaround for this erratum
          which sends an IPI to the CPUs that are running the same ASID
          as the one being invalidated.

endmenu

source "arch/arm/common/Kconfig"

menu "Bus support"

config ARM_AMBA
        bool

config ISA
        bool
        help
          Find out whether you have ISA slots on your motherboard.  ISA is the
          name of a bus system, i.e. the way the CPU talks to the other stuff
          inside your box.  Other bus systems are PCI, EISA, MicroChannel
          (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
          newer boards don't support it.  If you have ISA, say Y, otherwise N.

# Select ISA DMA controller support
config ISA_DMA
        bool
        select ISA_DMA_API

# Select ISA DMA interface
config ISA_DMA_API
        bool

config PCI
        bool "PCI support" if MIGHT_HAVE_PCI
        help
          Find out whether you have a PCI motherboard. PCI is the name of a
          bus system, i.e. the way the CPU talks to the other stuff inside
          your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
          VESA. If you have PCI, say Y, otherwise N.

config PCI_DOMAINS
        bool
        depends on PCI

config PCI_NANOENGINE
        bool "BSE nanoEngine PCI support"
        depends on SA1100_NANOENGINE
        help
          Enable PCI on the BSE nanoEngine board.

config PCI_SYSCALL
        def_bool PCI

# Select the host bridge type
config PCI_HOST_VIA82C505
        bool
        depends on PCI && ARCH_SHARK
        default y

config PCI_HOST_ITE8152
        bool
        depends on PCI && MACH_ARMCORE
        default y
        select DMABOUNCE

source "drivers/pci/Kconfig"

source "drivers/pcmcia/Kconfig"

endmenu

menu "Kernel Features"

config HAVE_SMP
        bool
        help
          This option should be selected by machines which have an SMP-
          capable CPU.

          The only effect of this option is to make the SMP-related
          options available to the user for configuration.

config SMP
        bool "Symmetric Multi-Processing"
        depends on CPU_V6K || CPU_V7
        depends on GENERIC_CLOCKEVENTS
        depends on HAVE_SMP
        depends on MMU
        select USE_GENERIC_SMP_HELPERS
        help
          This enables support for systems with more than one CPU. If you have
          a system with only one CPU, like most personal computers, say N. If
          you have a system with more than one CPU, say Y.

          If you say N here, the kernel will run on single and multiprocessor
          machines, but will use only one CPU of a multiprocessor machine. If
          you say Y here, the kernel will run on many, but not all, single
          processor machines. On a single processor machine, the kernel will
          run faster if you say N here.

          See also <file:Documentation/x86/i386/IO-APIC.txt>,
          <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
          <http://tldp.org/HOWTO/SMP-HOWTO.html>.

          If you don't know what to do here, say N.

config SMP_ON_UP
        bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
        depends on SMP && !XIP_KERNEL
        default y
        help
          SMP kernels contain instructions which fail on non-SMP processors.
          Enabling this option allows the kernel to modify itself to make
          these instructions safe.  Disabling it allows about 1K of space
          savings.

          If you don't know what to do here, say Y.

config ARM_CPU_TOPOLOGY
        bool "Support cpu topology definition"
        depends on SMP && CPU_V7
        default y
        help
          Support ARM cpu topology definition. The MPIDR register defines
          affinity between processors which is then used to describe the cpu
          topology of an ARM System.

config SCHED_MC
        bool "Multi-core scheduler support"
        depends on ARM_CPU_TOPOLOGY
        help
          Multi-core scheduler support improves the CPU scheduler's decision
          making when dealing with multi-core CPU chips at a cost of slightly
          increased overhead in some places. If unsure say N here.

config SCHED_SMT
        bool "SMT scheduler support"
        depends on ARM_CPU_TOPOLOGY
        help
          Improves the CPU scheduler's decision making when dealing with
          MultiThreading at a cost of slightly increased overhead in some
          places. If unsure say N here.

config DISABLE_CPU_SCHED_DOMAIN_BALANCE
        bool "(EXPERIMENTAL) Disable CPU level scheduler load-balancing"
        help
          Disables scheduler load-balancing at CPU sched domain level.

config SCHED_HMP
        bool "(EXPERIMENTAL) Heterogenous multiprocessor scheduling"
        depends on DISABLE_CPU_SCHED_DOMAIN_BALANCE && SCHED_MC && FAIR_GROUP_SCHED && !SCHED_AUTOGROUP
        help
          Experimental scheduler optimizations for heterogeneous platforms.
          Attempts to introspectively select task affinity to optimize power
          and performance. Basic support for multiple (>2) cpu types is in place,
          but it has only been tested with two types of cpus.
          There is currently no support for migration of task groups, hence
          !SCHED_AUTOGROUP. Furthermore, normal load-balancing must be disabled
          between cpus of different type (DISABLE_CPU_SCHED_DOMAIN_BALANCE).

config SCHED_HMP_PRIO_FILTER
        bool "(EXPERIMENTAL) Filter HMP migrations by task priority"
        depends on SCHED_HMP
        help
          Enables task priority based HMP migration filter. Any task with
          a NICE value above the threshold will always be on low-power cpus
          with less compute capacity.

config SCHED_HMP_PRIO_FILTER_VAL
        int "NICE priority threshold"
        default 5
        depends on SCHED_HMP_PRIO_FILTER

config HMP_FAST_CPU_MASK
        string "HMP scheduler fast CPU mask"
        depends on SCHED_HMP
        help
          Leave empty to use device tree information.
          Specify the cpuids of the fast CPUs in the system as a list string,
          e.g. cpuid 0+1 should be specified as 0-1.

config HMP_SLOW_CPU_MASK
        string "HMP scheduler slow CPU mask"
        depends on SCHED_HMP
        help
          Leave empty to use device tree information.
          Specify the cpuids of the slow CPUs in the system as a list string,
          e.g. cpuid 0+1 should be specified as 0-1.

config HMP_VARIABLE_SCALE
        bool "Allows changing the load tracking scale through sysfs"
        depends on SCHED_HMP
        help
          When turned on, this option exports the thresholds and load average
          period value for the load tracking patches through sysfs.
          The values can be modified to change the rate of load accumulation
          and the thresholds used for HMP migration.
          The load_avg_period_ms is the time in ms to reach a load average of
          0.5 for an idle task of 0 load average ratio that start a busy loop.
          The up_threshold and down_threshold is the value to go to a faster
          CPU or to go back to a slower cpu.
          The {up,down}_threshold are devided by 1024 before being compared
          to the load average.
          For examples, with load_avg_period_ms = 128 and up_threshold = 512,
          a running task with a load of 0 will be migrated to a bigger CPU after
          128ms, because after 128ms its load_avg_ratio is 0.5 and the real
          up_threshold is 0.5.
          This patch has the same behavior as changing the Y of the load
          average computation to
                (1002/1024)^(LOAD_AVG_PERIOD/load_avg_period_ms)
          but it remove intermadiate overflows in computation.

config HMP_FREQUENCY_INVARIANT_SCALE
        bool "(EXPERIMENTAL) Frequency-Invariant Tracked Load for HMP"
        depends on HMP_VARIABLE_SCALE && CPU_FREQ
        help
          Scales the current load contribution in line with the frequency
          of the CPU that the task was executed on.
          In this version, we use a simple linear scale derived from the
          maximum frequency reported by CPUFreq.
          Restricting tracked load to be scaled by the CPU's frequency
          represents the consumption of possible compute capacity
          (rather than consumption of actual instantaneous capacity as
          normal) and allows the HMP migration's simple threshold
          migration strategy to interact more predictably with CPUFreq's
          asynchronous compute capacity changes.

config HAVE_ARM_SCU
        bool
        help
          This option enables support for the ARM system coherency unit

config HAVE_ARM_ARCH_TIMER
        bool "Architected timer support"
        depends on CPU_V7
        select ARM_ARCH_TIMER
        help
          This option enables support for the ARM architected timer

config HAVE_ARM_TWD
        bool
        depends on SMP
        select CLKSRC_OF if OF
        help
          This options enables support for the ARM timer and watchdog unit

config MCPM
        bool "Multi-Cluster Power Management"
        depends on CPU_V7 && SMP
        help
          This option provides the common power management infrastructure
          for (multi-)cluster based systems, such as big.LITTLE based
          systems.

choice
        prompt "Memory split"
        default VMSPLIT_3G
        help
          Select the desired split between kernel and user memory.

          If you are not absolutely sure what you are doing, leave this
          option alone!

        config VMSPLIT_3G
                bool "3G/1G user/kernel split"
        config VMSPLIT_2G
                bool "2G/2G user/kernel split"
        config VMSPLIT_1G
                bool "1G/3G user/kernel split"
endchoice

config PAGE_OFFSET
        hex
        default 0x40000000 if VMSPLIT_1G
        default 0x80000000 if VMSPLIT_2G
        default 0xC0000000

config NR_CPUS
        int "Maximum number of CPUs (2-32)"
        range 2 32
        depends on SMP
        default "4"

config HOTPLUG_CPU
        bool "Support for hot-pluggable CPUs"
        depends on SMP && HOTPLUG
        help
          Say Y here to experiment with turning CPUs off and on.  CPUs
          can be controlled through /sys/devices/system/cpu.

config ARM_PSCI
        bool "Support for the ARM Power State Coordination Interface (PSCI)"
        depends on CPU_V7
        help
          Say Y here if you want Linux to communicate with system firmware
          implementing the PSCI specification for CPU-centric power
          management operations described in ARM document number ARM DEN
          0022A ("Power State Coordination Interface System Software on
          ARM processors").

config LOCAL_TIMERS
        bool "Use local timer interrupts"
        depends on SMP
        default y
        help
          Enable support for local timers on SMP platforms, rather then the
          legacy IPI broadcast method.  Local timers allows the system
          accounting to be spread across the timer interval, preventing a
          "thundering herd" at every timer tick.

# The GPIO number here must be sorted by descending number. In case of
# a multiplatform kernel, we just want the highest value required by the
# selected platforms.
config ARCH_NR_GPIO
        int
        default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
        default 512 if SOC_OMAP5
        default 392 if ARCH_U8500
        default 352 if ARCH_VT8500
        default 288 if ARCH_SUNXI
        default 264 if MACH_H4700
        default 0
        help
          Maximum number of GPIOs in the system.

          If unsure, leave the default value.

source kernel/Kconfig.preempt

config HZ
        int
        default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
                ARCH_S5PV210 || ARCH_EXYNOS4
        default AT91_TIMER_HZ if ARCH_AT91
        default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
        default 100

config SCHED_HRTICK
        def_bool HIGH_RES_TIMERS

config THUMB2_KERNEL
        bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
        depends on CPU_V7 && !CPU_V6 && !CPU_V6K
        default y if CPU_THUMBONLY
        select AEABI
        select ARM_ASM_UNIFIED
        select ARM_UNWIND
        help
          By enabling this option, the kernel will be compiled in
          Thumb-2 mode. A compiler/assembler that understand the unified
          ARM-Thumb syntax is needed.

          If unsure, say N.

config THUMB2_AVOID_R_ARM_THM_JUMP11
        bool "Work around buggy Thumb-2 short branch relocations in gas"
        depends on THUMB2_KERNEL && MODULES
        default y
        help
          Various binutils versions can resolve Thumb-2 branches to
          locally-defined, preemptible global symbols as short-range "b.n"
          branch instructions.

          This is a problem, because there's no guarantee the final
          destination of the symbol, or any candidate locations for a
          trampoline, are within range of the branch.  For this reason, the
          kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
          relocation in modules at all, and it makes little sense to add
          support.

          The symptom is that the kernel fails with an "unsupported
          relocation" error when loading some modules.

          Until fixed tools are available, passing
          -fno-optimize-sibling-calls to gcc should prevent gcc generating
          code which hits this problem, at the cost of a bit of extra runtime
          stack usage in some cases.

          The problem is described in more detail at:
              https://bugs.launchpad.net/binutils-linaro/+bug/725126

          Only Thumb-2 kernels are affected.

          Unless you are sure your tools don't have this problem, say Y.

config ARM_ASM_UNIFIED
        bool

config AEABI
        bool "Use the ARM EABI to compile the kernel"
        help
          This option allows for the kernel to be compiled using the latest
          ARM ABI (aka EABI).  This is only useful if you are using a user
          space environment that is also compiled with EABI.

          Since there are major incompatibilities between the legacy ABI and
          EABI, especially with regard to structure member alignment, this
          option also changes the kernel syscall calling convention to
          disambiguate both ABIs and allow for backward compatibility support
          (selected with CONFIG_OABI_COMPAT).

          To use this you need GCC version 4.0.0 or later.

config OABI_COMPAT
        bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
        depends on AEABI && !THUMB2_KERNEL
        default y
        help
          This option preserves the old syscall interface along with the
          new (ARM EABI) one. It also provides a compatibility layer to
          intercept syscalls that have structure arguments which layout
          in memory differs between the legacy ABI and the new ARM EABI
          (only for non "thumb" binaries). This option adds a tiny
          overhead to all syscalls and produces a slightly larger kernel.
          If you know you'll be using only pure EABI user space then you
          can say N here. If this option is not selected and you attempt
          to execute a legacy ABI binary then the result will be
          UNPREDICTABLE (in fact it can be predicted that it won't work
          at all). If in doubt say Y.

config ARCH_HAS_HOLES_MEMORYMODEL
        bool

config ARCH_SPARSEMEM_ENABLE
        bool

config ARCH_SPARSEMEM_DEFAULT
        def_bool ARCH_SPARSEMEM_ENABLE

config ARCH_SELECT_MEMORY_MODEL
        def_bool ARCH_SPARSEMEM_ENABLE

config HAVE_ARCH_PFN_VALID
        def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM

config HIGHMEM
        bool "High Memory Support"
        depends on MMU
        help
          The address space of ARM processors is only 4 Gigabytes large
          and it has to accommodate user address space, kernel address
          space as well as some memory mapped IO. That means that, if you
          have a large amount of physical memory and/or IO, not all of the
          memory can be "permanently mapped" by the kernel. The physical
          memory that is not permanently mapped is called "high memory".

          Depending on the selected kernel/user memory split, minimum
          vmalloc space and actual amount of RAM, you may not need this
          option which should result in a slightly faster kernel.

          If unsure, say n.

config HIGHPTE
        bool "Allocate 2nd-level pagetables from highmem"
        depends on HIGHMEM

config HW_PERF_EVENTS
        bool "Enable hardware performance counter support for perf events"
        depends on PERF_EVENTS
        default y
        help
          Enable hardware performance counter support for perf events. If
          disabled, perf events will use software events only.

source "mm/Kconfig"

config FORCE_MAX_ZONEORDER
        int "Maximum zone order" if ARCH_SHMOBILE
        range 11 64 if ARCH_SHMOBILE
        default "12" if SOC_AM33XX
        default "9" if SA1111
        default "11"
        help
          The kernel memory allocator divides physically contiguous memory
          blocks into "zones", where each zone is a power of two number of
          pages.  This option selects the largest power of two that the kernel
          keeps in the memory allocator.  If you need to allocate very large
          blocks of physically contiguous memory, then you may need to
          increase this value.

          This config option is actually maximum order plus one. For example,
          a value of 11 means that the largest free memory block is 2^10 pages.

config ALIGNMENT_TRAP
        bool
        depends on CPU_CP15_MMU
        default y if !ARCH_EBSA110
        select HAVE_PROC_CPU if PROC_FS
        help
          ARM processors cannot fetch/store information which is not
          naturally aligned on the bus, i.e., a 4 byte fetch must start at an
          address divisible by 4. On 32-bit ARM processors, these non-aligned
          fetch/store instructions will be emulated in software if you say
          here, which has a severe performance impact. This is necessary for
          correct operation of some network protocols. With an IP-only
          configuration it is safe to say N, otherwise say Y.

config UACCESS_WITH_MEMCPY
        bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
        depends on MMU
        default y if CPU_FEROCEON
        help
          Implement faster copy_to_user and clear_user methods for CPU
          cores where a 8-word STM instruction give significantly higher
          memory write throughput than a sequence of individual 32bit stores.

          A possible side effect is a slight increase in scheduling latency
          between threads sharing the same address space if they invoke
          such copy operations with large buffers.

          However, if the CPU data cache is using a write-allocate mode,
          this option is unlikely to provide any performance gain.

config SECCOMP
        bool
        prompt "Enable seccomp to safely compute untrusted bytecode"
        ---help---
          This kernel feature is useful for number crunching applications
          that may need to compute untrusted bytecode during their
          execution. By using pipes or other transports made available to
          the process as file descriptors supporting the read/write
          syscalls, it's possible to isolate those applications in
          their own address space using seccomp. Once seccomp is
          enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
          and the task is only allowed to execute a few safe syscalls
          defined by each seccomp mode.

config CC_STACKPROTECTOR
        bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
        help
          This option turns on the -fstack-protector GCC feature. This
          feature puts, at the beginning of functions, a canary value on
          the stack just before the return address, and validates
          the value just before actually returning.  Stack based buffer
          overflows (that need to overwrite this return address) now also
          overwrite the canary, which gets detected and the attack is then
          neutralized via a kernel panic.
          This feature requires gcc version 4.2 or above.

config XEN_DOM0
        def_bool y
        depends on XEN

config XEN
        bool "Xen guest support on ARM (EXPERIMENTAL)"
        depends on ARM && AEABI && OF
        depends on CPU_V7 && !CPU_V6
        depends on !GENERIC_ATOMIC64
        select ARM_PSCI
        help
          Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.

endmenu

menu "Boot options"

config USE_OF
        bool "Flattened Device Tree support"
        select IRQ_DOMAIN
        select OF
        select OF_EARLY_FLATTREE
        help
          Include support for flattened device tree machine descriptions.

config ATAGS
        bool "Support for the traditional ATAGS boot data passing" if USE_OF
        default y
        help
          This is the traditional way of passing data to the kernel at boot
          time. If you are solely relying on the flattened device tree (or
          the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
          to remove ATAGS support from your kernel binary.  If unsure,
          leave this to y.

config DEPRECATED_PARAM_STRUCT
        bool "Provide old way to pass kernel parameters"
        depends on ATAGS
        help
          This was deprecated in 2001 and announced to live on for 5 years.
          Some old boot loaders still use this way.

# Compressed boot loader in ROM.  Yes, we really want to ask about
# TEXT and BSS so we preserve their values in the config files.
config ZBOOT_ROM_TEXT
        hex "Compressed ROM boot loader base address"
        default "0"
        help
          The physical address at which the ROM-able zImage is to be
          placed in the target.  Platforms which normally make use of
          ROM-able zImage formats normally set this to a suitable
          value in their defconfig file.

          If ZBOOT_ROM is not enabled, this has no effect.

config ZBOOT_ROM_BSS
        hex "Compressed ROM boot loader BSS address"
        default "0"
        help
          The base address of an area of read/write memory in the target
          for the ROM-able zImage which must be available while the
          decompressor is running. It must be large enough to hold the
          entire decompressed kernel plus an additional 128 KiB.
          Platforms which normally make use of ROM-able zImage formats
          normally set this to a suitable value in their defconfig file.

          If ZBOOT_ROM is not enabled, this has no effect.

config ZBOOT_ROM
        bool "Compressed boot loader in ROM/flash"
        depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
        help
          Say Y here if you intend to execute your compressed kernel image
          (zImage) directly from ROM or flash.  If unsure, say N.

choice
        prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
        depends on ZBOOT_ROM && ARCH_SH7372
        default ZBOOT_ROM_NONE
        help
          Include experimental SD/MMC loading code in the ROM-able zImage.
          With this enabled it is possible to write the ROM-able zImage
          kernel image to an MMC or SD card and boot the kernel straight
          from the reset vector. At reset the processor Mask ROM will load
          the first part of the ROM-able zImage which in turn loads the
          rest the kernel image to RAM.

config ZBOOT_ROM_NONE
        bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
        help
          Do not load image from SD or MMC

config ZBOOT_ROM_MMCIF
        bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
        help
          Load image from MMCIF hardware block.

config ZBOOT_ROM_SH_MOBILE_SDHI
        bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
        help
          Load image from SDHI hardware block

endchoice

config ARM_APPENDED_DTB
        bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
        depends on OF && !ZBOOT_ROM
        help
          With this option, the boot code will look for a device tree binary
          (DTB) appended to zImage
          (e.g. cat zImage <filename>.dtb > zImage_w_dtb).

          This is meant as a backward compatibility convenience for those
          systems with a bootloader that can't be upgraded to accommodate
          the documented boot protocol using a device tree.

          Beware that there is very little in terms of protection against
          this option being confused by leftover garbage in memory that might
          look like a DTB header after a reboot if no actual DTB is appended
          to zImage.  Do not leave this option active in a production kernel
          if you don't intend to always append a DTB.  Proper passing of the
          location into r2 of a bootloader provided DTB is always preferable
          to this option.

config ARM_ATAG_DTB_COMPAT
        bool "Supplement the appended DTB with traditional ATAG information"
        depends on ARM_APPENDED_DTB
        help
          Some old bootloaders can't be updated to a DTB capable one, yet
          they provide ATAGs with memory configuration, the ramdisk address,
          the kernel cmdline string, etc.  Such information is dynamically
          provided by the bootloader and can't always be stored in a static
          DTB.  To allow a device tree enabled kernel to be used with such
          bootloaders, this option allows zImage to extract the information
          from the ATAG list and store it at run time into the appended DTB.

choice
        prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
        default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER

config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
        bool "Use bootloader kernel arguments if available"
        help
          Uses the command-line options passed by the boot loader instead of
          the device tree bootargs property. If the boot loader doesn't provide
          any, the device tree bootargs property will be used.

config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
        bool "Extend with bootloader kernel arguments"
        help
          The command-line arguments provided by the boot loader will be
          appended to the the device tree bootargs property.

endchoice

config CMDLINE
        string "Default kernel command string"
        default ""
        help
          On some architectures (EBSA110 and CATS), there is currently no way
          for the boot loader to pass arguments to the kernel. For these
          architectures, you should supply some command-line options at build
          time by entering them here. As a minimum, you should specify the
          memory size and the root device (e.g., mem=64M root=/dev/nfs).

choice
        prompt "Kernel command line type" if CMDLINE != ""
        default CMDLINE_FROM_BOOTLOADER
        depends on ATAGS

config CMDLINE_FROM_BOOTLOADER
        bool "Use bootloader kernel arguments if available"
        help
          Uses the command-line options passed by the boot loader. If
          the boot loader doesn't provide any, the default kernel command
          string provided in CMDLINE will be used.

config CMDLINE_EXTEND
        bool "Extend bootloader kernel arguments"
        help
          The command-line arguments provided by the boot loader will be
          appended to the default kernel command string.

config CMDLINE_FORCE
        bool "Always use the default kernel command string"
        help
          Always use the default kernel command string, even if the boot
          loader passes other arguments to the kernel.
          This is useful if you cannot or don't want to change the
          command-line options your boot loader passes to the kernel.
endchoice

config XIP_KERNEL
        bool "Kernel Execute-In-Place from ROM"
        depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
        help
          Execute-In-Place allows the kernel to run from non-volatile storage
          directly addressable by the CPU, such as NOR flash. This saves RAM
          space since the text section of the kernel is not loaded from flash
          to RAM.  Read-write sections, such as the data section and stack,
          are still copied to RAM.  The XIP kernel is not compressed since
          it has to run directly from flash, so it will take more space to
          store it.  The flash address used to link the kernel object files,
          and for storing it, is configuration dependent. Therefore, if you
          say Y here, you must know the proper physical address where to
          store the kernel image depending on your own flash memory usage.

          Also note that the make target becomes "make xipImage" rather than
          "make zImage" or "make Image".  The final kernel binary to put in
          ROM memory will be arch/arm/boot/xipImage.

          If unsure, say N.

config XIP_PHYS_ADDR
        hex "XIP Kernel Physical Location"
        depends on XIP_KERNEL
        default "0x00080000"
        help
          This is the physical address in your flash memory the kernel will
          be linked for and stored to.  This address is dependent on your
          own flash usage.

config KEXEC
        bool "Kexec system call (EXPERIMENTAL)"
        depends on (!SMP || PM_SLEEP_SMP)
        help
          kexec is a system call that implements the ability to shutdown your
          current kernel, and to start another kernel.  It is like a reboot
          but it is independent of the system firmware.   And like a reboot
          you can start any kernel with it, not just Linux.

          It is an ongoing process to be certain the hardware in a machine
          is properly shutdown, so do not be surprised if this code does not
          initially work for you.  It may help to enable device hotplugging
          support.

config ATAGS_PROC
        bool "Export atags in procfs"
        depends on ATAGS && KEXEC
        default y
        help
          Should the atags used to boot the kernel be exported in an "atags"
          file in procfs. Useful with kexec.

config CRASH_DUMP
        bool "Build kdump crash kernel (EXPERIMENTAL)"
        help
          Generate crash dump after being started by kexec. This should
          be normally only set in special crash dump kernels which are
          loaded in the main kernel with kexec-tools into a specially
          reserved region and then later executed after a crash by
          kdump/kexec. The crash dump kernel must be compiled to a
          memory address not used by the main kernel

          For more details see Documentation/kdump/kdump.txt

config AUTO_ZRELADDR
        bool "Auto calculation of the decompressed kernel image address"
        depends on !ZBOOT_ROM && !ARCH_U300
        help
          ZRELADDR is the physical address where the decompressed kernel
          image will be placed. If AUTO_ZRELADDR is selected, the address
          will be determined at run-time by masking the current IP with
          0xf8000000. This assumes the zImage being placed in the first 128MB
          from start of memory.

endmenu

menu "CPU Power Management"

if ARCH_HAS_CPUFREQ
source "drivers/cpufreq/Kconfig"

config CPU_FREQ_S3C
        bool
        help
          Internal configuration node for common cpufreq on Samsung SoC

config CPU_FREQ_S3C24XX
        bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
        depends on ARCH_S3C24XX && CPU_FREQ
        select CPU_FREQ_S3C
        help
          This enables the CPUfreq driver for the Samsung S3C24XX family
          of CPUs.

          For details, take a look at <file:Documentation/cpu-freq>.

          If in doubt, say N.

config CPU_FREQ_S3C24XX_PLL
        bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
        depends on CPU_FREQ_S3C24XX
        help
          Compile in support for changing the PLL frequency from the
          S3C24XX series CPUfreq driver. The PLL takes time to settle
          after a frequency change, so by default it is not enabled.

          This also means that the PLL tables for the selected CPU(s) will
          be built which may increase the size of the kernel image.

config CPU_FREQ_S3C24XX_DEBUG
        bool "Debug CPUfreq Samsung driver core"
        depends on CPU_FREQ_S3C24XX
        help
          Enable s3c_freq_dbg for the Samsung S3C CPUfreq core

config CPU_FREQ_S3C24XX_IODEBUG
        bool "Debug CPUfreq Samsung driver IO timing"
        depends on CPU_FREQ_S3C24XX
        help
          Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core

config CPU_FREQ_S3C24XX_DEBUGFS
        bool "Export debugfs for CPUFreq"
        depends on CPU_FREQ_S3C24XX && DEBUG_FS
        help
          Export status information via debugfs.

endif

source "drivers/cpuidle/Kconfig"

endmenu

menu "Floating point emulation"

comment "At least one emulation must be selected"

config FPE_NWFPE
        bool "NWFPE math emulation"
        depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
        ---help---
          Say Y to include the NWFPE floating point emulator in the kernel.
          This is necessary to run most binaries. Linux does not currently
          support floating point hardware so you need to say Y here even if
          your machine has an FPA or floating point co-processor podule.

          You may say N here if you are going to load the Acorn FPEmulator
          early in the bootup.

config FPE_NWFPE_XP
        bool "Support extended precision"
        depends on FPE_NWFPE
        help
          Say Y to include 80-bit support in the kernel floating-point
          emulator.  Otherwise, only 32 and 64-bit support is compiled in.
          Note that gcc does not generate 80-bit operations by default,
          so in most cases this option only enlarges the size of the
          floating point emulator without any good reason.

          You almost surely want to say N here.

config FPE_FASTFPE
        bool "FastFPE math emulation (EXPERIMENTAL)"
        depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
        ---help---
          Say Y here to include the FAST floating point emulator in the kernel.
          This is an experimental much faster emulator which now also has full
          precision for the mantissa.  It does not support any exceptions.
          It is very simple, and approximately 3-6 times faster than NWFPE.

          It should be sufficient for most programs.  It may be not suitable
          for scientific calculations, but you have to check this for yourself.
          If you do not feel you need a faster FP emulation you should better
          choose NWFPE.

config VFP
        bool "VFP-format floating point maths"
        depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
        help
          Say Y to include VFP support code in the kernel. This is needed
          if your hardware includes a VFP unit.

          Please see <file:Documentation/arm/VFP/release-notes.txt> for
          release notes and additional status information.

          Say N if your target does not have VFP hardware.

config VFPv3
        bool
        depends on VFP
        default y if CPU_V7

config NEON
        bool "Advanced SIMD (NEON) Extension support"
        depends on VFPv3 && CPU_V7
        help
          Say Y to include support code for NEON, the ARMv7 Advanced SIMD
          Extension.

endmenu

menu "Userspace binary formats"

source "fs/Kconfig.binfmt"

config ARTHUR
        tristate "RISC OS personality"
        depends on !AEABI
        help
          Say Y here to include the kernel code necessary if you want to run
          Acorn RISC OS/Arthur binaries under Linux. This code is still very
          experimental; if this sounds frightening, say N and sleep in peace.
          You can also say M here to compile this support as a module (which
          will be called arthur).

endmenu

menu "Power management options"

source "kernel/power/Kconfig"

config ARCH_SUSPEND_POSSIBLE
        depends on !ARCH_S5PC100
        depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
                CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
        def_bool y

config ARM_CPU_SUSPEND
        def_bool PM_SLEEP

endmenu

source "net/Kconfig"

source "drivers/Kconfig"

source "fs/Kconfig"

source "arch/arm/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"

source "arch/arm/kvm/Kconfig"