arch/arm64/Kconfig - linux-mtk - Git at Google


            
            config ARM64

            
            	def_bool y

            
            	select ARCH_BINFMT_ELF_RANDOMIZE_PIE

            
            	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

            
            	select ARCH_HAS_SG_CHAIN

            
            	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST

            
            	select ARCH_USE_CMPXCHG_LOCKREF

            
            	select ARCH_SUPPORTS_ATOMIC_RMW

            
            	select ARCH_WANT_OPTIONAL_GPIOLIB

            
            	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION

            
            	select ARCH_WANT_FRAME_POINTERS

            
            	select ARM_AMBA

            
            	select ARM_ARCH_TIMER

            
            	select ARM_GIC

            
            	select AUDIT_ARCH_COMPAT_GENERIC

            
            	select ARM_GIC_V3

            
            	select BUILDTIME_EXTABLE_SORT

            
            	select CLONE_BACKWARDS

            
            	select COMMON_CLK

            
            	select CPU_PM if (SUSPEND || CPU_IDLE)

            
            	select DCACHE_WORD_ACCESS

            
            	select GENERIC_ALLOCATOR

            
            	select GENERIC_CLOCKEVENTS

            
            	select GENERIC_CLOCKEVENTS_BROADCAST if SMP

            
            	select GENERIC_CPU_AUTOPROBE

            
            	select GENERIC_EARLY_IOREMAP

            
            	select GENERIC_IOMAP

            
            	select GENERIC_IRQ_PROBE

            
            	select GENERIC_IRQ_SHOW

            
            	select GENERIC_SCHED_CLOCK

            
            	select GENERIC_SMP_IDLE_THREAD

            
            	select GENERIC_STRNCPY_FROM_USER

            
            	select GENERIC_STRNLEN_USER

            
            	select GENERIC_TIME_VSYSCALL

            
            	select HANDLE_DOMAIN_IRQ

            
            	select HARDIRQS_SW_RESEND

            
            	select HAVE_ARCH_AUDITSYSCALL

            
            	select HAVE_ARCH_JUMP_LABEL

            
            	select HAVE_ARCH_KGDB

            
            	select HAVE_ARCH_TRACEHOOK

            
            	select HAVE_BPF_JIT

            
            	select HAVE_C_RECORDMCOUNT

            
            	select HAVE_CC_STACKPROTECTOR

            
            	select HAVE_DEBUG_BUGVERBOSE

            
            	select HAVE_DEBUG_KMEMLEAK

            
            	select HAVE_DMA_API_DEBUG

            
            	select HAVE_DMA_ATTRS

            
            	select HAVE_DMA_CONTIGUOUS

            
            	select HAVE_DYNAMIC_FTRACE

            
            	select HAVE_EFFICIENT_UNALIGNED_ACCESS

            
            	select HAVE_FTRACE_MCOUNT_RECORD

            
            	select HAVE_FUNCTION_TRACER

            
            	select HAVE_FUNCTION_GRAPH_TRACER

            
            	select HAVE_GENERIC_DMA_COHERENT

            
            	select HAVE_HW_BREAKPOINT if PERF_EVENTS

            
            	select HAVE_MEMBLOCK

            
            	select HAVE_PATA_PLATFORM

            
            	select HAVE_PERF_EVENTS

            
            	select HAVE_PERF_REGS

            
            	select HAVE_PERF_USER_STACK_DUMP

            
            	select HAVE_RCU_TABLE_FREE

            
            	select HAVE_SYSCALL_TRACEPOINTS

            
            	select IRQ_DOMAIN

            
            	select MODULES_USE_ELF_RELA

            
            	select NO_BOOTMEM

            
            	select OF

            
            	select OF_EARLY_FLATTREE

            
            	select OF_RESERVED_MEM

            
            	select PERF_USE_VMALLOC

            
            	select POWER_RESET

            
            	select POWER_SUPPLY

            
            	select RTC_LIB

            
            	select SPARSE_IRQ

            
            	select SYSCTL_EXCEPTION_TRACE

            
            	select HAVE_CONTEXT_TRACKING

            
            	help

            
            	  ARM 64-bit (AArch64) Linux support.


            config 64BIT

            
            	def_bool y


            config ARCH_PHYS_ADDR_T_64BIT

            
            	def_bool y


            config MMU

            
            	def_bool y


            config NO_IOPORT_MAP

            
            	def_bool y if !PCI


            config STACKTRACE_SUPPORT

            
            	def_bool y


            config LOCKDEP_SUPPORT

            
            	def_bool y


            config TRACE_IRQFLAGS_SUPPORT

            
            	def_bool y


            config RWSEM_XCHGADD_ALGORITHM

            
            	def_bool y


            config GENERIC_HWEIGHT

            
            	def_bool y


            config GENERIC_CSUM

            
                    def_bool y


            config GENERIC_CALIBRATE_DELAY

            
            	def_bool y


            config ZONE_DMA

            
            	def_bool y


            config HAVE_GENERIC_RCU_GUP

            
            	def_bool y


            config ARCH_DMA_ADDR_T_64BIT

            
            	def_bool y


            config NEED_DMA_MAP_STATE

            
            	def_bool y


            config NEED_SG_DMA_LENGTH

            
            	def_bool y


            config SWIOTLB

            
            	def_bool y


            config IOMMU_HELPER

            
            	def_bool SWIOTLB


            config KERNEL_MODE_NEON

            
            	def_bool y


            config FIX_EARLYCON_MEM

            
            	def_bool y


            source "init/Kconfig"


            source "kernel/Kconfig.freezer"


            menu "Platform selection"


            config ARCH_THUNDER

            
            	bool "Cavium Inc. Thunder SoC Family"

            
            	help

            
            	  This enables support for Cavium's Thunder Family of SoCs.


            config ARCH_VEXPRESS

            
            	bool "ARMv8 software model (Versatile Express)"

            
            	select ARCH_REQUIRE_GPIOLIB

            
            	select COMMON_CLK_VERSATILE

            
            	select POWER_RESET_VEXPRESS

            
            	select VEXPRESS_CONFIG

            
            	help

            
            	  This enables support for the ARMv8 software model (Versatile

            
            	  Express).


            config ARCH_XGENE

            
            	bool "AppliedMicro X-Gene SOC Family"

            
            	help

            
            	  This enables support for AppliedMicro X-Gene SOC Family


            endmenu


            menu "Bus support"


            config ARM_AMBA

            
            	bool


            config PCI

            
            	bool "PCI support"

            
            	help

            
            	  This feature enables support for PCI bus system. If you say Y

            
            	  here, the kernel will include drivers and infrastructure code

            
            	  to support PCI bus devices.


            config PCI_DOMAINS

            
            	def_bool PCI


            config PCI_DOMAINS_GENERIC

            
            	def_bool PCI


            config PCI_SYSCALL

            
            	def_bool PCI


            source "drivers/pci/Kconfig"

            
            source "drivers/pci/pcie/Kconfig"

            
            source "drivers/pci/hotplug/Kconfig"


            endmenu


            menu "Kernel Features"


            choice

            
            	prompt "Page size"

            
            	default ARM64_4K_PAGES

            
            	help

            
            	  Page size (translation granule) configuration.


            config ARM64_4K_PAGES

            
            	bool "4KB"

            
            	help

            
            	  This feature enables 4KB pages support.


            config ARM64_64K_PAGES

            
            	bool "64KB"

            
            	help

            
            	  This feature enables 64KB pages support (4KB by default)

            
            	  allowing only two levels of page tables and faster TLB

            
            	  look-up. AArch32 emulation is not available when this feature

            
            	  is enabled.


            endchoice


            choice

            
            	prompt "Virtual address space size"

            
            	default ARM64_VA_BITS_39 if ARM64_4K_PAGES

            
            	default ARM64_VA_BITS_42 if ARM64_64K_PAGES

            
            	help

            
            	  Allows choosing one of multiple possible virtual address

            
            	  space sizes. The level of translation table is determined by

            
            	  a combination of page size and virtual address space size.


            config ARM64_VA_BITS_39

            
            	bool "39-bit"

            
            	depends on ARM64_4K_PAGES


            config ARM64_VA_BITS_42

            
            	bool "42-bit"

            
            	depends on ARM64_64K_PAGES


            config ARM64_VA_BITS_48

            
            	bool "48-bit"

            
            	depends on !ARM_SMMU


            endchoice


            config ARM64_VA_BITS

            
            	int

            
            	default 39 if ARM64_VA_BITS_39

            
            	default 42 if ARM64_VA_BITS_42

            
            	default 48 if ARM64_VA_BITS_48


            config ARM64_PGTABLE_LEVELS

            
            	int

            
            	default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42

            
            	default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48

            
            	default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39

            
            	default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48


            config CPU_BIG_ENDIAN

            
                   bool "Build big-endian kernel"

            
                   help

            
                     Say Y if you plan on running a kernel in big-endian mode.


            config SMP

            
            	bool "Symmetric Multi-Processing"

            
            	help

            
            	  This enables support for systems with more than one CPU.  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.


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


            config SCHED_MC

            
            	bool "Multi-core scheduler support"

            
            	depends on SMP

            
            	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 SMP

            
            	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 NR_CPUS

            
            	int "Maximum number of CPUs (2-64)"

            
            	range 2 64

            
            	depends on SMP

            
            	# These have to remain sorted largest to smallest

            
            	default "64"


            config HOTPLUG_CPU

            
            	bool "Support for hot-pluggable CPUs"

            
            	depends on SMP

            
            	help

            
            	  Say Y here to experiment with turning CPUs off and on.  CPUs

            
            	  can be controlled through /sys/devices/system/cpu.


            source kernel/Kconfig.preempt


            config HZ

            
            	int

            
            	default 100


            config ARCH_HAS_HOLES_MEMORYMODEL

            
            	def_bool y if SPARSEMEM


            config ARCH_SPARSEMEM_ENABLE

            
            	def_bool y

            
            	select SPARSEMEM_VMEMMAP_ENABLE


            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 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.


            config SYS_SUPPORTS_HUGETLBFS

            
            	def_bool y


            config ARCH_WANT_GENERAL_HUGETLB

            
            	def_bool y


            config ARCH_WANT_HUGE_PMD_SHARE

            
            	def_bool y if !ARM64_64K_PAGES


            config HAVE_ARCH_TRANSPARENT_HUGEPAGE

            
            	def_bool y


            config ARCH_HAS_CACHE_LINE_SIZE

            
            	def_bool y


            source "mm/Kconfig"


            config XEN_DOM0

            
            	def_bool y

            
            	depends on XEN


            config XEN

            
            	bool "Xen guest support on ARM64"

            
            	depends on ARM64 && OF

            
            	select SWIOTLB_XEN

            
            	help

            
            	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.


            config FORCE_MAX_ZONEORDER

            
            	int

            
            	default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)

            
            	default "11"


            endmenu


            menu "Boot options"


            config CMDLINE

            
            	string "Default kernel command string"

            
            	default ""

            
            	help

            
            	  Provide a set of default command-line options at build time by

            
            	  entering them here. As a minimum, you should specify the the

            
            	  root device (e.g. root=/dev/nfs).


            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.


            config EFI_STUB

            
            	bool


            config EFI

            
            	bool "UEFI runtime support"

            
            	depends on OF && !CPU_BIG_ENDIAN

            
            	select LIBFDT

            
            	select UCS2_STRING

            
            	select EFI_PARAMS_FROM_FDT

            
            	select EFI_RUNTIME_WRAPPERS

            
            	select EFI_STUB

            
            	select EFI_ARMSTUB

            
            	default y

            
            	help

            
            	  This option provides support for runtime services provided

            
            	  by UEFI firmware (such as non-volatile variables, realtime

            
                      clock, and platform reset). A UEFI stub is also provided to

            
            	  allow the kernel to be booted as an EFI application. This

            
            	  is only useful on systems that have UEFI firmware.


            endmenu


            menu "Userspace binary formats"


            source "fs/Kconfig.binfmt"


            config COMPAT

            
            	bool "Kernel support for 32-bit EL0"

            
            	depends on !ARM64_64K_PAGES

            
            	select COMPAT_BINFMT_ELF

            
            	select HAVE_UID16

            
            	select OLD_SIGSUSPEND3

            
            	select COMPAT_OLD_SIGACTION

            
            	help

            
            	  This option enables support for a 32-bit EL0 running under a 64-bit

            
            	  kernel at EL1. AArch32-specific components such as system calls,

            
            	  the user helper functions, VFP support and the ptrace interface are

            
            	  handled appropriately by the kernel.


            	  If you want to execute 32-bit userspace applications, say Y.


            config SYSVIPC_COMPAT

            
            	def_bool y

            
            	depends on COMPAT && SYSVIPC


            endmenu


            menu "Power management options"


            source "kernel/power/Kconfig"


            config ARCH_SUSPEND_POSSIBLE

            
            	def_bool y


            config ARM64_CPU_SUSPEND

            
            	def_bool PM_SLEEP


            endmenu


            menu "CPU Power Management"


            source "drivers/cpuidle/Kconfig"


            source "drivers/cpufreq/Kconfig"


            endmenu


            source "net/Kconfig"


            source "drivers/Kconfig"


            source "drivers/firmware/Kconfig"


            source "fs/Kconfig"


            source "arch/arm64/kvm/Kconfig"


            source "arch/arm64/Kconfig.debug"


            source "security/Kconfig"


            source "crypto/Kconfig"

            
            if CRYPTO

            
            source "arch/arm64/crypto/Kconfig"

            
            endif


            source "lib/Kconfig"
	config ARM64
	def_bool y
	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
	select ARCH_HAS_SG_CHAIN
	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
	select ARCH_USE_CMPXCHG_LOCKREF
	select ARCH_SUPPORTS_ATOMIC_RMW
	select ARCH_WANT_OPTIONAL_GPIOLIB
	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
	select ARCH_WANT_FRAME_POINTERS
	select ARM_AMBA
	select ARM_ARCH_TIMER
	select ARM_GIC
	select AUDIT_ARCH_COMPAT_GENERIC
	select ARM_GIC_V3
	select BUILDTIME_EXTABLE_SORT
	select CLONE_BACKWARDS
	select COMMON_CLK
	select CPU_PM if (SUSPEND \|\| CPU_IDLE)
	select DCACHE_WORD_ACCESS
	select GENERIC_ALLOCATOR
	select GENERIC_CLOCKEVENTS
	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
	select GENERIC_CPU_AUTOPROBE
	select GENERIC_EARLY_IOREMAP
	select GENERIC_IOMAP
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_SCHED_CLOCK
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
	select GENERIC_TIME_VSYSCALL
	select HANDLE_DOMAIN_IRQ
	select HARDIRQS_SW_RESEND
	select HAVE_ARCH_AUDITSYSCALL
	select HAVE_ARCH_JUMP_LABEL
	select HAVE_ARCH_KGDB
	select HAVE_ARCH_TRACEHOOK
	select HAVE_BPF_JIT
	select HAVE_C_RECORDMCOUNT
	select HAVE_CC_STACKPROTECTOR
	select HAVE_DEBUG_BUGVERBOSE
	select HAVE_DEBUG_KMEMLEAK
	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
	select HAVE_DMA_CONTIGUOUS
	select HAVE_DYNAMIC_FTRACE
	select HAVE_EFFICIENT_UNALIGNED_ACCESS
	select HAVE_FTRACE_MCOUNT_RECORD
	select HAVE_FUNCTION_TRACER
	select HAVE_FUNCTION_GRAPH_TRACER
	select HAVE_GENERIC_DMA_COHERENT
	select HAVE_HW_BREAKPOINT if PERF_EVENTS
	select HAVE_MEMBLOCK
	select HAVE_PATA_PLATFORM
	select HAVE_PERF_EVENTS
	select HAVE_PERF_REGS
	select HAVE_PERF_USER_STACK_DUMP
	select HAVE_RCU_TABLE_FREE
	select HAVE_SYSCALL_TRACEPOINTS
	select IRQ_DOMAIN
	select MODULES_USE_ELF_RELA
	select NO_BOOTMEM
	select OF
	select OF_EARLY_FLATTREE
	select OF_RESERVED_MEM
	select PERF_USE_VMALLOC
	select POWER_RESET
	select POWER_SUPPLY
	select RTC_LIB
	select SPARSE_IRQ
	select SYSCTL_EXCEPTION_TRACE
	select HAVE_CONTEXT_TRACKING
	help
	ARM 64-bit (AArch64) Linux support.

	config 64BIT
	def_bool y

	config ARCH_PHYS_ADDR_T_64BIT
	def_bool y

	config MMU
	def_bool y

	config NO_IOPORT_MAP
	def_bool y if !PCI

	config STACKTRACE_SUPPORT
	def_bool y

	config LOCKDEP_SUPPORT
	def_bool y

	config TRACE_IRQFLAGS_SUPPORT
	def_bool y

	config RWSEM_XCHGADD_ALGORITHM
	def_bool y

	config GENERIC_HWEIGHT
	def_bool y

	config GENERIC_CSUM
	def_bool y

	config GENERIC_CALIBRATE_DELAY
	def_bool y

	config ZONE_DMA
	def_bool y

	config HAVE_GENERIC_RCU_GUP
	def_bool y

	config ARCH_DMA_ADDR_T_64BIT
	def_bool y

	config NEED_DMA_MAP_STATE
	def_bool y

	config NEED_SG_DMA_LENGTH
	def_bool y

	config SWIOTLB
	def_bool y

	config IOMMU_HELPER
	def_bool SWIOTLB

	config KERNEL_MODE_NEON
	def_bool y

	config FIX_EARLYCON_MEM
	def_bool y

	source "init/Kconfig"

	source "kernel/Kconfig.freezer"

	menu "Platform selection"

	config ARCH_THUNDER
	bool "Cavium Inc. Thunder SoC Family"
	help
	This enables support for Cavium's Thunder Family of SoCs.

	config ARCH_VEXPRESS
	bool "ARMv8 software model (Versatile Express)"
	select ARCH_REQUIRE_GPIOLIB
	select COMMON_CLK_VERSATILE
	select POWER_RESET_VEXPRESS
	select VEXPRESS_CONFIG
	help
	This enables support for the ARMv8 software model (Versatile
	Express).

	config ARCH_XGENE
	bool "AppliedMicro X-Gene SOC Family"
	help
	This enables support for AppliedMicro X-Gene SOC Family

	endmenu

	menu "Bus support"

	config ARM_AMBA
	bool

	config PCI
	bool "PCI support"
	help
	This feature enables support for PCI bus system. If you say Y
	here, the kernel will include drivers and infrastructure code
	to support PCI bus devices.

	config PCI_DOMAINS
	def_bool PCI

	config PCI_DOMAINS_GENERIC
	def_bool PCI

	config PCI_SYSCALL
	def_bool PCI

	source "drivers/pci/Kconfig"
	source "drivers/pci/pcie/Kconfig"
	source "drivers/pci/hotplug/Kconfig"

	endmenu

	menu "Kernel Features"

	choice
	prompt "Page size"
	default ARM64_4K_PAGES
	help
	Page size (translation granule) configuration.

	config ARM64_4K_PAGES
	bool "4KB"
	help
	This feature enables 4KB pages support.

	config ARM64_64K_PAGES
	bool "64KB"
	help
	This feature enables 64KB pages support (4KB by default)
	allowing only two levels of page tables and faster TLB
	look-up. AArch32 emulation is not available when this feature
	is enabled.

	endchoice

	choice
	prompt "Virtual address space size"
	default ARM64_VA_BITS_39 if ARM64_4K_PAGES
	default ARM64_VA_BITS_42 if ARM64_64K_PAGES
	help
	Allows choosing one of multiple possible virtual address
	space sizes. The level of translation table is determined by
	a combination of page size and virtual address space size.

	config ARM64_VA_BITS_39
	bool "39-bit"
	depends on ARM64_4K_PAGES

	config ARM64_VA_BITS_42
	bool "42-bit"
	depends on ARM64_64K_PAGES

	config ARM64_VA_BITS_48
	bool "48-bit"
	depends on !ARM_SMMU

	endchoice

	config ARM64_VA_BITS
	int
	default 39 if ARM64_VA_BITS_39
	default 42 if ARM64_VA_BITS_42
	default 48 if ARM64_VA_BITS_48

	config ARM64_PGTABLE_LEVELS
	int
	default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
	default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
	default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
	default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48

	config CPU_BIG_ENDIAN
	bool "Build big-endian kernel"
	help
	Say Y if you plan on running a kernel in big-endian mode.

	config SMP
	bool "Symmetric Multi-Processing"
	help
	This enables support for systems with more than one CPU. 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.

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

	config SCHED_MC
	bool "Multi-core scheduler support"
	depends on SMP
	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 SMP
	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 NR_CPUS
	int "Maximum number of CPUs (2-64)"
	range 2 64
	depends on SMP
	# These have to remain sorted largest to smallest
	default "64"

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

	source kernel/Kconfig.preempt

	config HZ
	int
	default 100

	config ARCH_HAS_HOLES_MEMORYMODEL
	def_bool y if SPARSEMEM

	config ARCH_SPARSEMEM_ENABLE
	def_bool y
	select SPARSEMEM_VMEMMAP_ENABLE

	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 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.

	config SYS_SUPPORTS_HUGETLBFS
	def_bool y

	config ARCH_WANT_GENERAL_HUGETLB
	def_bool y

	config ARCH_WANT_HUGE_PMD_SHARE
	def_bool y if !ARM64_64K_PAGES

	config HAVE_ARCH_TRANSPARENT_HUGEPAGE
	def_bool y

	config ARCH_HAS_CACHE_LINE_SIZE
	def_bool y

	source "mm/Kconfig"

	config XEN_DOM0
	def_bool y
	depends on XEN

	config XEN
	bool "Xen guest support on ARM64"
	depends on ARM64 && OF
	select SWIOTLB_XEN
	help
	Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.

	config FORCE_MAX_ZONEORDER
	int
	default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
	default "11"

	endmenu

	menu "Boot options"

	config CMDLINE
	string "Default kernel command string"
	default ""
	help
	Provide a set of default command-line options at build time by
	entering them here. As a minimum, you should specify the the
	root device (e.g. root=/dev/nfs).

	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.

	config EFI_STUB
	bool

	config EFI
	bool "UEFI runtime support"
	depends on OF && !CPU_BIG_ENDIAN
	select LIBFDT
	select UCS2_STRING
	select EFI_PARAMS_FROM_FDT
	select EFI_RUNTIME_WRAPPERS
	select EFI_STUB
	select EFI_ARMSTUB
	default y
	help
	This option provides support for runtime services provided
	by UEFI firmware (such as non-volatile variables, realtime
	clock, and platform reset). A UEFI stub is also provided to
	allow the kernel to be booted as an EFI application. This
	is only useful on systems that have UEFI firmware.

	endmenu

	menu "Userspace binary formats"

	source "fs/Kconfig.binfmt"

	config COMPAT
	bool "Kernel support for 32-bit EL0"
	depends on !ARM64_64K_PAGES
	select COMPAT_BINFMT_ELF
	select HAVE_UID16
	select OLD_SIGSUSPEND3
	select COMPAT_OLD_SIGACTION
	help
	This option enables support for a 32-bit EL0 running under a 64-bit
	kernel at EL1. AArch32-specific components such as system calls,
	the user helper functions, VFP support and the ptrace interface are
	handled appropriately by the kernel.

	If you want to execute 32-bit userspace applications, say Y.

	config SYSVIPC_COMPAT
	def_bool y
	depends on COMPAT && SYSVIPC

	endmenu

	menu "Power management options"

	source "kernel/power/Kconfig"

	config ARCH_SUSPEND_POSSIBLE
	def_bool y

	config ARM64_CPU_SUSPEND
	def_bool PM_SLEEP

	endmenu

	menu "CPU Power Management"

	source "drivers/cpuidle/Kconfig"

	source "drivers/cpufreq/Kconfig"

	endmenu

	source "net/Kconfig"

	source "drivers/Kconfig"

	source "drivers/firmware/Kconfig"

	source "fs/Kconfig"

	source "arch/arm64/kvm/Kconfig"

	source "arch/arm64/Kconfig.debug"

	source "security/Kconfig"

	source "crypto/Kconfig"
	if CRYPTO
	source "arch/arm64/crypto/Kconfig"
	endif

	source "lib/Kconfig"