Kconfig 8.59 KB
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config ARM64
	def_bool y
	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
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	select ARCH_HAS_OPP
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	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
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	select ARCH_USE_CMPXCHG_LOCKREF
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	select ARCH_WANT_OPTIONAL_GPIOLIB
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	select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
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	select ARCH_WANT_FRAME_POINTERS
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	select ARM_AMBA
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	select ARM_ARCH_TIMER
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	select ARM_GIC
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	select AUDIT_ARCH_COMPAT_GENERIC
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	select BUILDTIME_EXTABLE_SORT
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	select CLONE_BACKWARDS
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	select COMMON_CLK
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	select CPU_PM if (SUSPEND || CPU_IDLE)
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	select DCACHE_WORD_ACCESS
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	select GENERIC_CLOCKEVENTS
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	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
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	select GENERIC_CPU_AUTOPROBE
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	select GENERIC_EARLY_IOREMAP
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	select GENERIC_IOMAP
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
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	select GENERIC_SCHED_CLOCK
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	select GENERIC_SMP_IDLE_THREAD
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	select GENERIC_STRNCPY_FROM_USER
	select GENERIC_STRNLEN_USER
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	select GENERIC_TIME_VSYSCALL
	select HARDIRQS_SW_RESEND
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	select HAVE_ARCH_AUDITSYSCALL
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	select HAVE_ARCH_JUMP_LABEL
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	select HAVE_ARCH_KGDB
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	select HAVE_ARCH_TRACEHOOK
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	select HAVE_C_RECORDMCOUNT
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	select HAVE_CC_STACKPROTECTOR
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	select HAVE_DEBUG_BUGVERBOSE
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	select HAVE_DEBUG_KMEMLEAK
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	select HAVE_DMA_API_DEBUG
	select HAVE_DMA_ATTRS
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	select HAVE_DMA_CONTIGUOUS
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	select HAVE_DYNAMIC_FTRACE
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	select HAVE_EFFICIENT_UNALIGNED_ACCESS
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	select HAVE_FTRACE_MCOUNT_RECORD
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	select HAVE_FUNCTION_TRACER
	select HAVE_FUNCTION_GRAPH_TRACER
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	select HAVE_GENERIC_DMA_COHERENT
	select HAVE_HW_BREAKPOINT if PERF_EVENTS
	select HAVE_MEMBLOCK
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	select HAVE_PATA_PLATFORM
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	select HAVE_PERF_EVENTS
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	select HAVE_PERF_REGS
	select HAVE_PERF_USER_STACK_DUMP
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	select HAVE_SYSCALL_TRACEPOINTS
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	select IRQ_DOMAIN
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	select MODULES_USE_ELF_RELA
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	select NO_BOOTMEM
	select OF
	select OF_EARLY_FLATTREE
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	select OF_RESERVED_MEM
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	select PERF_USE_VMALLOC
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	select POWER_RESET
	select POWER_SUPPLY
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	select RTC_LIB
	select SPARSE_IRQ
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	select SYSCTL_EXCEPTION_TRACE
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	select HAVE_CONTEXT_TRACKING
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	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

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config NO_IOPORT_MAP
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	def_bool y

config STACKTRACE_SUPPORT
	def_bool y

config LOCKDEP_SUPPORT
	def_bool y

config TRACE_IRQFLAGS_SUPPORT
	def_bool y

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config RWSEM_XCHGADD_ALGORITHM
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	def_bool y

config GENERIC_HWEIGHT
	def_bool y

config GENERIC_CSUM
        def_bool y

config GENERIC_CALIBRATE_DELAY
	def_bool y

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config ZONE_DMA
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	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

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config KERNEL_MODE_NEON
	def_bool y

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config FIX_EARLYCON_MEM
	def_bool y

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source "init/Kconfig"

source "kernel/Kconfig.freezer"

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menu "Platform selection"

config ARCH_VEXPRESS
	bool "ARMv8 software model (Versatile Express)"
	select ARCH_REQUIRE_GPIOLIB
	select COMMON_CLK_VERSATILE
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	select POWER_RESET_VEXPRESS
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	select VEXPRESS_CONFIG
	help
	  This enables support for the ARMv8 software model (Versatile
	  Express).
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config ARCH_XGENE
	bool "AppliedMicro X-Gene SOC Family"
	help
	  This enables support for AppliedMicro X-Gene SOC Family

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endmenu

menu "Bus support"

config ARM_AMBA
	bool

endmenu

menu "Kernel Features"

config ARM64_64K_PAGES
	bool "Enable 64KB pages support"
	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.

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

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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.

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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.

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config NR_CPUS
	int "Maximum number of CPUs (2-32)"
	range 2 32
	depends on SMP
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	# These have to remain sorted largest to smallest
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	default "8"
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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.

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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.

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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

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config HAVE_ARCH_TRANSPARENT_HUGEPAGE
	def_bool y

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config ARCH_HAS_CACHE_LINE_SIZE
	def_bool y

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source "mm/Kconfig"

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config XEN_DOM0
	def_bool y
	depends on XEN

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

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

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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.

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config EFI
	bool "UEFI runtime support"
	depends on OF && !CPU_BIG_ENDIAN
	select LIBFDT
	select UCS2_STRING
	select EFI_PARAMS_FROM_FDT
	default y
	help
	  This option provides support for runtime services provided
	  by UEFI firmware (such as non-volatile variables, realtime
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          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.
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config DMI
	bool "Enable support for SMBIOS (DMI) tables"
	depends on EFI
	default y
	help
	  This enables SMBIOS/DMI feature for systems.

	  This option is only useful on systems that have UEFI firmware.
	  However, even with this option, the resultant kernel should
	  continue to boot on existing non-UEFI platforms.

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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
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	select HAVE_UID16
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	select OLD_SIGSUSPEND3
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	select COMPAT_OLD_SIGACTION
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	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

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menu "Power management options"

source "kernel/power/Kconfig"

config ARCH_SUSPEND_POSSIBLE
	def_bool y

config ARM64_CPU_SUSPEND
	def_bool PM_SLEEP

endmenu

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menu "CPU Power Management"

source "drivers/cpuidle/Kconfig"

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source "drivers/cpufreq/Kconfig"

endmenu

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source "net/Kconfig"

source "drivers/Kconfig"

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source "drivers/firmware/Kconfig"

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source "fs/Kconfig"

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source "arch/arm64/kvm/Kconfig"

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source "arch/arm64/Kconfig.debug"

source "security/Kconfig"

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