Aquaris-M10-4G/arch/arm64/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_SECCOMP_FILTER
	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
	select DT_IDLE_STATES
	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

config ARM64_ERRATUM_836870
	bool "Cortex-A53: 836870: Non-allocating reads might prevent a store exclusive from passing"
	depends on ARM64
	help
	  This option enables the workaround for erratum 836870
	  affecting Cortex-A53 MPCore with two or more processors (r0p0..r0p3).
	  If a Cortex-A53 processor is executing a load and store exclusive instruction in a loop then there are certain conditions
	  that are allowed to cause the store exclusive instruction to repeatedly fail. This includes another processor repeatedly
	  writing to the same cache line. In addition to these allowed conditions, a non-allocating load from another processor migh
	  also cause the store exclusive instruction to repeatedly fail.

	  This walkaournd is to ensure system do not use non-allocating load. For 32 bit ATF and 64 bit project,
	  master cpu's DTAH bit is set to 1 at preloader stage and set to 1 again after suspend through
	  dormant driver in ATF. Slave cpus's DTAH bit is set to 1 at dormant driver in ATF stage.
	  For 32 bit non-ATF project, Master cpu's DTAH bit is set to 1 at preloader stage and
	  set to 1 again after suspend through dormant driver in kernel. Slave cpus's DTAH bit is set to 1
	  by hotplug driver in kernel.

	  In 64 bit project, this Kernel config do nothing since all patches are in ATF and preloader. and
	  ATF and preloader are already default enable these patches.


config ARM64_ERRATUM_845719
	bool "Cortex-A53: 845719: a load might read incorrect data"
	depends on COMPAT
	default y
	help
	  This option enables the workaround for erratum 845719.
	  When running a compat (AArch32) userspace on an affected Cortex-A53
	  part, a load at EL0 from a virtual address that matches the bottom 32
	  bits of the virtual address used by a recent load at (AArch64) EL1
	  might return incorrect data.

	  The workaround is to write the contextidr_el1 register on exception
	  return to a 32-bit task.
	  Please note that this does not necessarily enable the workaround,
	  as it depends on the alternative framework, which will only patch
	  the kernel if an affected CPU is detected.

	  If unsure, say 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_MEDIATEK
	bool
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select ARCH_HAS_CPUFREQ
	select ARM_AMBA
	select CPU_V7
	select HAVE_SMP
	select NEED_MACH_MEMORY_H
	select IRQ_DOMAIN
	select IRQ_DOMAIN_DEBUG
	select GENERIC_SCHED_CLOCK
	select ARMV7_COMPAT
	select ARMV7_COMPAT_CPUINFO
	select CPU_IDLE
	select PINCTRL
	select MFD_SYSCON

config ARCH_MT6735
	bool "MediaTek MT6735"
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select ARCH_HAS_CPUFREQ
	select ARM_AMBA
	select CPU_V7
	select HAVE_SMP
	select NEED_MACH_MEMORY_H
	select IRQ_DOMAIN
	select IRQ_DOMAIN_DEBUG
	select GENERIC_SCHED_CLOCK
	select MTK_SYSTRACKER
	select MTK_SYS_CIRQ
	select MTK_EIC
	select ARMV7_COMPAT
	select ARMV7_COMPAT_CPUINFO
	select CPU_IDLE
	select PINCTRL
	select PINCTRL_MT6735
	select MFD_SYSCON
	select MTK_BASE_POWER
	select MTK_GIC
	select ARM64_ERRATUM_845719
	select ARM64_ERRATUM_836870
	select MTK_IRQ_NEW_DESIGN
	select MTK_IRQ_NEW_DESIGN_DEBUG
	select MTK_POWER_GS
	select MTK_CPU_STRESS
	help
	  This enable support for MediaTek MT6735

config ARCH_MT6753
	bool "MediaTek MT6753"
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select ARCH_HAS_CPUFREQ
	select ARM_AMBA
	select CPU_V7
	select HAVE_SMP
	select NEED_MACH_MEMORY_H
	select IRQ_DOMAIN
	select IRQ_DOMAIN_DEBUG
	select GENERIC_SCHED_CLOCK
	select MTK_SYSTRACKER
	select MTK_SYS_CIRQ
	select MTK_EIC
	select MTK_GIC
	select ARMV7_COMPAT
	select ARMV7_COMPAT_CPUINFO
	select CPU_IDLE
	select ARM_MT6735_CPUIDLE
	select MTK_BASE_POWER
	select PINCTRL
	select PINCTRL_MT6735
	select MFD_SYSCON
	select ARM64_ERRATUM_845719
	select ARM64_ERRATUM_836870
	select MTK_IRQ_NEW_DESIGN
	select MTK_IRQ_NEW_DESIGN_DEBUG
	select MTK_POWER_GS
	select MTK_CPU_STRESS
	help
	  This enable support for MediaTek MT6753
	  To enable related drivers
	  support for k53v1_64 related project
	  support for k53v1_64_op02 project

config ARCH_MT6755
	bool "MediaTek MT6755"
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select ARCH_HAS_CPUFREQ
	select ARM_AMBA
	select CPU_V7
	select HAVE_SMP
	select NEED_MACH_MEMORY_H
	select IRQ_DOMAIN
	select IRQ_DOMAIN_DEBUG
	select GENERIC_SCHED_CLOCK
	select MTK_SYS_CIRQ
	select MTK_EIC
	select ARMV7_COMPAT
	select ARMV7_COMPAT_CPUINFO
	select CPU_IDLE
	select PINCTRL
	select PINCTRL_MT6755
	select MFD_SYSCON
	select MTK_BASE_POWER
	select MTK_GIC
	select ARM64_ERRATUM_845719
	select ARM64_ERRATUM_836870
	select MTK_POWER_GS
	select MTK_SYSTRACKER_V2
	select MTK_LM_MODE
	help
	  This enables support for MediaTek MT6755
	  Support for aarch64/aarch32 Architecture
	  Support for evb6755 related projects
	  Support for k55 related projects

config ARCH_MT6797
	bool "MediaTek MT6797"
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select ARCH_HAS_CPUFREQ
	select ARM_AMBA
	select CPU_V7
	select HAVE_SMP
	select NEED_MACH_MEMORY_H
	select IRQ_DOMAIN
	select IRQ_DOMAIN_DEBUG
	select GENERIC_SCHED_CLOCK
	select MTK_SYS_CIRQ
	select MTK_EIC
	select ARMV7_COMPAT
	select ARMV7_COMPAT_CPUINFO
	select CPU_IDLE
	select PINCTRL
	select PINCTRL_MT6797
	select MFD_SYSCON
	select MTK_BASE_POWER
	select MTK_POWER_GS
	select MTK_SYSTRACKER_V2
	select MTK_GIC_V3_EXT
	help
	  This enables support for MediaTek MT6797
	  Support for aarch64/aarch32 Architecture
	  Support for fpga6797_64 related projects
	  Support for evb6797_64 related projects
	  Support for k97_64 related projects

config ARCH_MT8163
	bool "MediaTek MT8163"
	select ARCH_MEDIATEK
	select MTK_BASE_POWER
	select MTK_SYS_CIRQ
	select MTK_GIC_EXT
	help
	  This enable support for MediaTek MT8163. If you need support
	  for MediaTek MT8163, say Y here.
	  Please note this also select ARCH_MEDIATEK, so driver depends
	  on it can be selected.

config ARCH_MT8173
	bool "MediaTek MT8173"
	select ARCH_MEDIATEK
	select MTK_BASE_POWER
	select MTK_SYS_CIRQ
	select MTK_GIC_EXT
	help
	  This enable support for MediaTek MT8173. If you need support
	  for MediaTek MT8173, say Y here.
	  Please note this also select ARCH_MEDIATEK, so driver depends
	  on it can be selected.

config ARCH_MT6735M
	bool "MediaTek MT6735M"
	select GENERIC_TIME
	select GENERIC_CLOCKEVENTS
	select ARCH_HAS_CPUFREQ
	select ARM_AMBA
	select CPU_V7
	select HAVE_SMP
	select NEED_MACH_MEMORY_H
	select IRQ_DOMAIN
	select IRQ_DOMAIN_DEBUG
	select GENERIC_SCHED_CLOCK
	select MTK_SYSTRACKER
	select MTK_SYS_CIRQ
	select MTK_EIC
	select ARMV7_COMPAT
	select ARMV7_COMPAT_CPUINFO
	select CPU_IDLE
	select ARM_MT6735_CPUIDLE
	select MTK_GIC
	select MTK_IRQ_NEW_DESIGN
	select MTK_IRQ_NEW_DESIGN_DEBUG
	select PINCTRL
	select PINCTRL_MT6735
	select MFD_SYSCON
	select MTK_BASE_POWER
	select MTK_POWER_GS
	select MTK_CPU_STRESS
	help
	  This enable support for MediaTek MT6735M
	  Support for k35mv1_64
	  Support for k35mv1_64_op01
	  Support for k35mv1_64_op02

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

endmenu

source "drivers/misc/mediatek/mach/Kconfig"

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"

menu "ARM errata workarounds via the alternatives framework"

config ARM64_ERRATUM_826319
	bool "Cortex-A53: 826319: System might deadlock if a write cannot complete until read data is accepted"
	default y
	help
	  This option adds an alternative code sequence to work around ARM
	  erratum 826319 on Cortex-A53 parts up to r0p2 with an AMBA 4 ACE or
	  AXI master interface and an L2 cache.

	  If a Cortex-A53 uses an AMBA AXI4 ACE interface to other processors
	  and is unable to accept a certain write via this interface, it will
	  not progress on read data presented on the read data channel and the
	  system can deadlock.

	  The workaround promotes data cache clean instructions to
	  data cache clean-and-invalidate.
	  Please note that this does not necessarily enable the workaround,
	  as it depends on the alternative framework, which will only patch
	  the kernel if an affected CPU is detected.

	  If unsure, say Y.

config ARM64_ERRATUM_827319
	bool "Cortex-A53: 827319: Data cache clean instructions might cause overlapping transactions to the interconnect"
	default y
	help
	  This option adds an alternative code sequence to work around ARM
	  erratum 827319 on Cortex-A53 parts up to r0p2 with an AMBA 5 CHI
	  master interface and an L2 cache.

	  Under certain conditions this erratum can cause a clean line eviction
	  to occur at the same time as another transaction to the same address
	  on the AMBA 5 CHI interface, which can cause data corruption if the
	  interconnect reorders the two transactions.

	  The workaround promotes data cache clean instructions to
	  data cache clean-and-invalidate.
	  Please note that this does not necessarily enable the workaround,
	  as it depends on the alternative framework, which will only patch
	  the kernel if an affected CPU is detected.

	  If unsure, say Y.

config ARM64_ERRATUM_824069
	bool "Cortex-A53: 824069: Cache line might not be marked as clean after a CleanShared snoop"
	default y
	help
	  This option adds an alternative code sequence to work around ARM
	  erratum 824069 on Cortex-A53 parts up to r0p2 when it is connected
	  to a coherent interconnect.

	  If a Cortex-A53 processor is executing a store or prefetch for
	  write instruction at the same time as a processor in another
	  cluster is executing a cache maintenance operation to the same
	  address, then this erratum might cause a clean cache line to be
	  incorrectly marked as dirty.

	  The workaround promotes data cache clean instructions to
	  data cache clean-and-invalidate.
	  Please note that this option does not necessarily enable the
	  workaround, as it depends on the alternative framework, which will
	  only patch the kernel if an affected CPU is detected.

	  If unsure, say Y.

config ARM64_ERRATUM_819472
	bool "Cortex-A53: 819472: Store exclusive instructions might cause data corruption"
	default y
	help
	  This option adds an alternative code sequence to work around ARM
	  erratum 819472 on Cortex-A53 parts up to r0p1 with an L2 cache
	  present when it is connected to a coherent interconnect.

	  If the processor is executing a load and store exclusive sequence at
	  the same time as a processor in another cluster is executing a cache
	  maintenance operation to the same address, then this erratum might
	  cause data corruption.

	  The workaround promotes data cache clean instructions to
	  data cache clean-and-invalidate.
	  Please note that this does not necessarily enable the workaround,
	  as it depends on the alternative framework, which will only patch
	  the kernel if an affected CPU is detected.

	  If unsure, say Y.

config ARM64_ERRATUM_832075
	bool "Cortex-A57: 832075: possible deadlock on mixing exclusive memory accesses with device loads"
	default y
	help
	  This option adds an alternative code sequence to work around ARM
	  erratum 832075 on Cortex-A57 parts up to r1p2.

	  Affected Cortex-A57 parts might deadlock when exclusive load/store
	  instructions to Write-Back memory are mixed with Device loads.

	  The workaround is to promote device loads to use Load-Acquire
	  semantics.
	  Please note that this does not necessarily enable the workaround,
	  as it depends on the alternative framework, which will only patch
	  the kernel if an affected CPU is detected.

	  If unsure, say Y.

config ARM64_ERRATUM_845719
	bool "Cortex-A53: 845719: a load might read incorrect data"
	depends on COMPAT
	default y
	help
	  This option adds an alternative code sequence to work around ARM
	  erratum 845719 on Cortex-A53 parts up to r0p4.

	  When running a compat (AArch32) userspace on an affected Cortex-A53
	  part, a load at EL0 from a virtual address that matches the bottom 32
	  bits of the virtual address used by a recent load at (AArch64) EL1
	  might return incorrect data.

	  The workaround is to write the contextidr_el1 register on exception
	  return to a 32-bit task.
	  Please note that this does not necessarily enable the workaround,
	  as it depends on the alternative framework, which will only patch
	  the kernel if an affected CPU is detected.

	  If unsure, say Y.

endmenu


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 SECCOMP
	bool "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 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"

menuconfig ARMV8_DEPRECATED
	bool "Emulate deprecated/obsolete ARMv8 instructions"
	depends on COMPAT
	help
	  Legacy software support may require certain instructions
	  that have been deprecated or obsoleted in the architecture.

	  Enable this config to enable selective emulation of these
	  features.

	  If unsure, say Y

if ARMV8_DEPRECATED

config SWP_EMULATION
	bool "Emulate SWP/SWPB instructions"
	help
	  ARMv8 obsoletes the use of A32 SWP/SWPB instructions such that
	  they are always undefined. Say Y here to enable software
	  emulation of these instructions for userspace using LDXR/STXR.

	  In some older versions of glibc [<=2.8] SWP is used during futex
	  trylock() operations with the assumption that the code will not
	  be preempted. This invalid assumption may be more likely to fail
	  with SWP emulation enabled, leading to deadlock of the user
	  application.

	  NOTE: when accessing uncached shared regions, LDXR/STXR rely
	  on an external transaction monitoring block called a global
	  monitor to maintain update atomicity. If your system does not
	  implement a global monitor, this option can cause programs that
	  perform SWP operations to uncached memory to deadlock.

	  If unsure, say Y

config CP15_BARRIER_EMULATION
	bool "Emulate CP15 Barrier instructions"
	help
	  The CP15 barrier instructions - CP15ISB, CP15DSB, and
	  CP15DMB - are deprecated in ARMv8 (and ARMv7). It is
	  strongly recommended to use the ISB, DSB, and DMB
	  instructions instead.

	  Say Y here to enable software emulation of these
	  instructions for AArch32 userspace code. When this option is
	  enabled, CP15 barrier usage is traced which can help
	  identify software that needs updating.

	  If unsure, say Y

config SETEND_EMULATION
	bool "Emulate SETEND instruction"
	help
	  The SETEND instruction alters the data-endianness of the
	  AArch32 EL0, and is deprecated in ARMv8.

	  Say Y here to enable software emulation of the instruction
	  for AArch32 userspace code.

	  Note: All the cpus on the system must have mixed endian support at EL0
	  for this feature to be enabled. If a new CPU - which doesn't support mixed
	  endian - is hotplugged in after this feature has been enabled, there could
	  be unexpected results in the applications.

	  If unsure, say Y

endif

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).

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

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 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.

config BUILD_ARM64_APPENDED_DTB_IMAGE
	bool "Build a concatenated Image.gz/dtb by default"
	depends on OF
	help
	  Enabling this option will cause a concatenated Image.gz and list of
	  DTBs to be built by default (instead of a standalone Image.gz.)
	  The image will built in arch/arm64/boot/Image.gz-dtb

config BUILD_ARM64_APPENDED_DTB_IMAGE_NAMES
	string "Default dtb names"
	depends on BUILD_ARM64_APPENDED_DTB_IMAGE
	help
	  Space separated list of names of dtbs to append when
	  building a concatenated Image.gz-dtb.

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

config ARCH_HIBERNATION_POSSIBLE
        bool
        depends on MMU
        default y if ARCH_SUSPEND_POSSIBLE

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"