arch/loongarch/Kconfig - third_party/linux - Git at Google


            
            # SPDX-License-Identifier: GPL-2.0

            
            config LOONGARCH

            
            	bool

            
            	default y

            
            	select ACPI

            
            	select ACPI_GENERIC_GSI if ACPI

            
            	select ACPI_MCFG if ACPI

            
            	select ACPI_SYSTEM_POWER_STATES_SUPPORT	if ACPI

            
            	select ARCH_BINFMT_ELF_STATE

            
            	select ARCH_ENABLE_MEMORY_HOTPLUG

            
            	select ARCH_ENABLE_MEMORY_HOTREMOVE

            
            	select ARCH_HAS_ACPI_TABLE_UPGRADE	if ACPI

            
            	select ARCH_HAS_PHYS_TO_DMA

            
            	select ARCH_HAS_PTE_SPECIAL

            
            	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST

            
            	select ARCH_INLINE_READ_LOCK if !PREEMPTION

            
            	select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION

            
            	select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION

            
            	select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION

            
            	select ARCH_INLINE_READ_UNLOCK if !PREEMPTION

            
            	select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION

            
            	select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION

            
            	select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_LOCK if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION

            
            	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_LOCK if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION

            
            	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION

            
            	select ARCH_KEEP_MEMBLOCK

            
            	select ARCH_MIGHT_HAVE_PC_PARPORT

            
            	select ARCH_MIGHT_HAVE_PC_SERIO

            
            	select ARCH_SPARSEMEM_ENABLE

            
            	select ARCH_STACKWALK

            
            	select ARCH_SUPPORTS_ACPI

            
            	select ARCH_SUPPORTS_ATOMIC_RMW

            
            	select ARCH_SUPPORTS_HUGETLBFS

            
            	select ARCH_SUPPORTS_NUMA_BALANCING

            
            	select ARCH_USE_BUILTIN_BSWAP

            
            	select ARCH_USE_CMPXCHG_LOCKREF

            
            	select ARCH_USE_QUEUED_RWLOCKS

            
            	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT

            
            	select ARCH_WANT_LD_ORPHAN_WARN

            
            	select ARCH_WANTS_NO_INSTR

            
            	select BUILDTIME_TABLE_SORT

            
            	select COMMON_CLK

            
            	select EFI

            
            	select GENERIC_CLOCKEVENTS

            
            	select GENERIC_CMOS_UPDATE

            
            	select GENERIC_CPU_AUTOPROBE

            
            	select GENERIC_ENTRY

            
            	select GENERIC_GETTIMEOFDAY

            
            	select GENERIC_IRQ_MULTI_HANDLER

            
            	select GENERIC_IRQ_PROBE

            
            	select GENERIC_IRQ_SHOW

            
            	select GENERIC_LIB_ASHLDI3

            
            	select GENERIC_LIB_ASHRDI3

            
            	select GENERIC_LIB_CMPDI2

            
            	select GENERIC_LIB_LSHRDI3

            
            	select GENERIC_LIB_UCMPDI2

            
            	select GENERIC_PCI_IOMAP

            
            	select GENERIC_SCHED_CLOCK

            
            	select GENERIC_SMP_IDLE_THREAD

            
            	select GENERIC_TIME_VSYSCALL

            
            	select GPIOLIB

            
            	select HAVE_ARCH_AUDITSYSCALL

            
            	select HAVE_ARCH_MMAP_RND_BITS if MMU

            
            	select HAVE_ARCH_SECCOMP_FILTER

            
            	select HAVE_ARCH_TRACEHOOK

            
            	select HAVE_ARCH_TRANSPARENT_HUGEPAGE

            
            	select HAVE_ASM_MODVERSIONS

            
            	select HAVE_CONTEXT_TRACKING_USER

            
            	select HAVE_DEBUG_STACKOVERFLOW

            
            	select HAVE_DMA_CONTIGUOUS

            
            	select HAVE_EXIT_THREAD

            
            	select HAVE_FAST_GUP

            
            	select HAVE_GENERIC_VDSO

            
            	select HAVE_IOREMAP_PROT

            
            	select HAVE_IRQ_EXIT_ON_IRQ_STACK

            
            	select HAVE_IRQ_TIME_ACCOUNTING

            
            	select HAVE_MOD_ARCH_SPECIFIC

            
            	select HAVE_NMI

            
            	select HAVE_PCI

            
            	select HAVE_PERF_EVENTS

            
            	select HAVE_REGS_AND_STACK_ACCESS_API

            
            	select HAVE_RSEQ

            
            	select HAVE_SETUP_PER_CPU_AREA if NUMA

            
            	select HAVE_SYSCALL_TRACEPOINTS

            
            	select HAVE_TIF_NOHZ

            
            	select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP

            
            	select IRQ_FORCED_THREADING

            
            	select IRQ_LOONGARCH_CPU

            
            	select MMU_GATHER_MERGE_VMAS if MMU

            
            	select MODULES_USE_ELF_RELA if MODULES

            
            	select NEED_PER_CPU_EMBED_FIRST_CHUNK

            
            	select NEED_PER_CPU_PAGE_FIRST_CHUNK

            
            	select OF

            
            	select OF_EARLY_FLATTREE

            
            	select PCI

            
            	select PCI_DOMAINS_GENERIC

            
            	select PCI_ECAM if ACPI

            
            	select PCI_LOONGSON

            
            	select PCI_MSI_ARCH_FALLBACKS

            
            	select PCI_QUIRKS

            
            	select PERF_USE_VMALLOC

            
            	select RTC_LIB

            
            	select SMP

            
            	select SPARSE_IRQ

            
            	select SYSCTL_EXCEPTION_TRACE

            
            	select SWIOTLB

            
            	select TRACE_IRQFLAGS_SUPPORT

            
            	select USE_PERCPU_NUMA_NODE_ID

            
            	select USER_STACKTRACE_SUPPORT

            
            	select ZONE_DMA32


            config 32BIT

            
            	bool


            config 64BIT

            
            	def_bool y


            config CPU_HAS_FPU

            
            	bool

            
            	default y


            config CPU_HAS_PREFETCH

            
            	bool

            
            	default y


            config GENERIC_CALIBRATE_DELAY

            
            	def_bool y


            config GENERIC_CSUM

            
            	def_bool y


            config GENERIC_HWEIGHT

            
            	def_bool y


            config L1_CACHE_SHIFT

            
            	int

            
            	default "6"


            config LOCKDEP_SUPPORT

            
            	bool

            
            	default y


            config STACKTRACE_SUPPORT

            
            	bool

            
            	default y


            # MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the

            
            # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that

            
            # are shared between architectures, and specifically expecting the symbols.

            
            config MACH_LOONGSON32

            
            	def_bool 32BIT


            config MACH_LOONGSON64

            
            	def_bool 64BIT


            config PAGE_SIZE_4KB

            
            	bool


            config PAGE_SIZE_16KB

            
            	bool


            config PAGE_SIZE_64KB

            
            	bool


            config PGTABLE_2LEVEL

            
            	bool


            config PGTABLE_3LEVEL

            
            	bool


            config PGTABLE_4LEVEL

            
            	bool


            config PGTABLE_LEVELS

            
            	int

            
            	default 2 if PGTABLE_2LEVEL

            
            	default 3 if PGTABLE_3LEVEL

            
            	default 4 if PGTABLE_4LEVEL


            config SCHED_OMIT_FRAME_POINTER

            
            	bool

            
            	default y


            menu "Kernel type and options"


            source "kernel/Kconfig.hz"


            choice

            
            	prompt "Page Table Layout"

            
            	default 16KB_2LEVEL if 32BIT

            
            	default 16KB_3LEVEL if 64BIT

            
            	help

            
            	  Allows choosing the page table layout, which is a combination

            
            	  of page size and page table levels. The size of virtual memory

            
            	  address space are determined by the page table layout.


            config 4KB_3LEVEL

            
            	bool "4KB with 3 levels"

            
            	select PAGE_SIZE_4KB

            
            	select PGTABLE_3LEVEL

            
            	help

            
            	  This option selects 4KB page size with 3 level page tables, which

            
            	  support a maximum of 39 bits of application virtual memory.


            config 4KB_4LEVEL

            
            	bool "4KB with 4 levels"

            
            	select PAGE_SIZE_4KB

            
            	select PGTABLE_4LEVEL

            
            	help

            
            	  This option selects 4KB page size with 4 level page tables, which

            
            	  support a maximum of 48 bits of application virtual memory.


            config 16KB_2LEVEL

            
            	bool "16KB with 2 levels"

            
            	select PAGE_SIZE_16KB

            
            	select PGTABLE_2LEVEL

            
            	help

            
            	  This option selects 16KB page size with 2 level page tables, which

            
            	  support a maximum of 36 bits of application virtual memory.


            config 16KB_3LEVEL

            
            	bool "16KB with 3 levels"

            
            	select PAGE_SIZE_16KB

            
            	select PGTABLE_3LEVEL

            
            	help

            
            	  This option selects 16KB page size with 3 level page tables, which

            
            	  support a maximum of 47 bits of application virtual memory.


            config 64KB_2LEVEL

            
            	bool "64KB with 2 levels"

            
            	select PAGE_SIZE_64KB

            
            	select PGTABLE_2LEVEL

            
            	help

            
            	  This option selects 64KB page size with 2 level page tables, which

            
            	  support a maximum of 42 bits of application virtual memory.


            config 64KB_3LEVEL

            
            	bool "64KB with 3 levels"

            
            	select PAGE_SIZE_64KB

            
            	select PGTABLE_3LEVEL

            
            	help

            
            	  This option selects 64KB page size with 3 level page tables, which

            
            	  support a maximum of 55 bits of application virtual memory.


            endchoice


            config CMDLINE

            
            	string "Built-in kernel command line"

            
            	help

            
            	  For most platforms, the arguments for the kernel's command line

            
            	  are provided at run-time, during boot. However, there are cases

            
            	  where either no arguments are being provided or the provided

            
            	  arguments are insufficient or even invalid.


            	  When that occurs, it is possible to define a built-in command

            
            	  line here and choose how the kernel should use it later on.


            choice

            
            	prompt "Kernel command line type"

            
            	default CMDLINE_BOOTLOADER

            
            	help

            
            	  Choose how the kernel will handle the provided built-in command

            
            	  line.


            config CMDLINE_BOOTLOADER

            
            	bool "Use bootloader kernel arguments if available"

            
            	help

            
            	  Prefer the command-line passed by the boot loader if available.

            
            	  Use the built-in command line as fallback in case we get nothing

            
            	  during boot. This is the default behaviour.


            config CMDLINE_EXTEND

            
            	bool "Use built-in to extend bootloader kernel arguments"

            
            	help

            
            	  The command-line arguments provided during boot will be

            
            	  appended to the built-in command line. This is useful in

            
            	  cases where the provided arguments are insufficient and

            
            	  you don't want to or cannot modify them.


            config CMDLINE_FORCE

            
            	bool "Always use the built-in kernel command string"

            
            	help

            
            	  Always use the built-in command line, even if we get one during

            
            	  boot. This is useful in case you need to override the provided

            
            	  command line on systems where you don't have or want control

            
            	  over it.


            endchoice


            config DMI

            
            	bool "Enable DMI scanning"

            
            	select DMI_SCAN_MACHINE_NON_EFI_FALLBACK

            
            	default y

            
            	help

            
            	  This enables SMBIOS/DMI feature for systems, and scanning of

            
            	  DMI to identify machine quirks.


            config EFI

            
            	bool "EFI runtime service support"

            
            	select UCS2_STRING

            
            	select EFI_PARAMS_FROM_FDT

            
            	select EFI_RUNTIME_WRAPPERS

            
            	help

            
            	  This enables the kernel to use EFI runtime services that are

            
            	  available (such as the EFI variable services).


            config SMP

            
            	bool "Multi-Processing support"

            
            	help

            
            	  This enables support for systems with more than one CPU. If you have

            
            	  a system with only one CPU, say N. If you have a system with more

            
            	  than one CPU, say Y.


            	  If you say N here, the kernel will run on uni- 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,

            
            	  uniprocessor machines. On a uniprocessor machine, the kernel

            
            	  will run faster if you say N here.


            	  See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>.


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


            config HOTPLUG_CPU

            
            	bool "Support for hot-pluggable CPUs"

            
            	depends on SMP

            
            	select GENERIC_IRQ_MIGRATION

            
            	help

            
            	  Say Y here to allow turning CPUs off and on. CPUs can be

            
            	  controlled through /sys/devices/system/cpu.

            
            	  (Note: power management support will enable this option

            
            	    automatically on SMP systems. )

            
            	  Say N if you want to disable CPU hotplug.


            config NR_CPUS

            
            	int "Maximum number of CPUs (2-256)"

            
            	range 2 256

            
            	depends on SMP

            
            	default "64"

            
            	help

            
            	  This allows you to specify the maximum number of CPUs which this

            
            	  kernel will support.


            config NUMA

            
            	bool "NUMA Support"

            
            	select SMP

            
            	select ACPI_NUMA if ACPI

            
            	help

            
            	  Say Y to compile the kernel with NUMA (Non-Uniform Memory Access)

            
            	  support.  This option improves performance on systems with more

            
            	  than one NUMA node; on single node systems it is generally better

            
            	  to leave it disabled.


            config NODES_SHIFT

            
            	int

            
            	default "6"

            
            	depends on NUMA


            config FORCE_MAX_ZONEORDER

            
            	int "Maximum zone order"

            
            	range 14 64 if PAGE_SIZE_64KB

            
            	default "14" if PAGE_SIZE_64KB

            
            	range 12 64 if PAGE_SIZE_16KB

            
            	default "12" if PAGE_SIZE_16KB

            
            	range 11 64

            
            	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.


            	  The page size is not necessarily 4KB.  Keep this in mind

            
            	  when choosing a value for this option.


            config SECCOMP

            
            	bool "Enable seccomp to safely compute untrusted bytecode"

            
            	depends on PROC_FS

            
            	default y

            
            	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 /proc/<pid>/seccomp, it cannot be disabled

            
            	  and the task is only allowed to execute a few safe syscalls

            
            	  defined by each seccomp mode.


            	  If unsure, say Y. Only embedded should say N here.


            endmenu


            config ARCH_SELECT_MEMORY_MODEL

            
            	def_bool y


            config ARCH_FLATMEM_ENABLE

            
            	def_bool y

            
            	depends on !NUMA


            config ARCH_SPARSEMEM_ENABLE

            
            	def_bool y

            
            	help

            
            	  Say Y to support efficient handling of sparse physical memory,

            
            	  for architectures which are either NUMA (Non-Uniform Memory Access)

            
            	  or have huge holes in the physical address space for other reasons.

            
            	  See <file:Documentation/mm/numa.rst> for more.


            config ARCH_ENABLE_THP_MIGRATION

            
            	def_bool y

            
            	depends on TRANSPARENT_HUGEPAGE


            config ARCH_MEMORY_PROBE

            
            	def_bool y

            
            	depends on MEMORY_HOTPLUG


            config MMU

            
            	bool

            
            	default y


            config ARCH_MMAP_RND_BITS_MIN

            
            	default 12


            config ARCH_MMAP_RND_BITS_MAX

            
            	default 18


            menu "Power management options"


            source "drivers/acpi/Kconfig"


            endmenu


            source "drivers/firmware/Kconfig"
	# SPDX-License-Identifier: GPL-2.0
	config LOONGARCH
	bool
	default y
	select ACPI
	select ACPI_GENERIC_GSI if ACPI
	select ACPI_MCFG if ACPI
	select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
	select ARCH_BINFMT_ELF_STATE
	select ARCH_ENABLE_MEMORY_HOTPLUG
	select ARCH_ENABLE_MEMORY_HOTREMOVE
	select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
	select ARCH_HAS_PHYS_TO_DMA
	select ARCH_HAS_PTE_SPECIAL
	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
	select ARCH_INLINE_READ_LOCK if !PREEMPTION
	select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION
	select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION
	select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION
	select ARCH_INLINE_READ_UNLOCK if !PREEMPTION
	select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION
	select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION
	select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION
	select ARCH_INLINE_WRITE_LOCK if !PREEMPTION
	select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION
	select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION
	select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION
	select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION
	select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION
	select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION
	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION
	select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION
	select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION
	select ARCH_INLINE_SPIN_LOCK if !PREEMPTION
	select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION
	select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION
	select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION
	select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION
	select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION
	select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION
	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
	select ARCH_KEEP_MEMBLOCK
	select ARCH_MIGHT_HAVE_PC_PARPORT
	select ARCH_MIGHT_HAVE_PC_SERIO
	select ARCH_SPARSEMEM_ENABLE
	select ARCH_STACKWALK
	select ARCH_SUPPORTS_ACPI
	select ARCH_SUPPORTS_ATOMIC_RMW
	select ARCH_SUPPORTS_HUGETLBFS
	select ARCH_SUPPORTS_NUMA_BALANCING
	select ARCH_USE_BUILTIN_BSWAP
	select ARCH_USE_CMPXCHG_LOCKREF
	select ARCH_USE_QUEUED_RWLOCKS
	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
	select ARCH_WANT_LD_ORPHAN_WARN
	select ARCH_WANTS_NO_INSTR
	select BUILDTIME_TABLE_SORT
	select COMMON_CLK
	select EFI
	select GENERIC_CLOCKEVENTS
	select GENERIC_CMOS_UPDATE
	select GENERIC_CPU_AUTOPROBE
	select GENERIC_ENTRY
	select GENERIC_GETTIMEOFDAY
	select GENERIC_IRQ_MULTI_HANDLER
	select GENERIC_IRQ_PROBE
	select GENERIC_IRQ_SHOW
	select GENERIC_LIB_ASHLDI3
	select GENERIC_LIB_ASHRDI3
	select GENERIC_LIB_CMPDI2
	select GENERIC_LIB_LSHRDI3
	select GENERIC_LIB_UCMPDI2
	select GENERIC_PCI_IOMAP
	select GENERIC_SCHED_CLOCK
	select GENERIC_SMP_IDLE_THREAD
	select GENERIC_TIME_VSYSCALL
	select GPIOLIB
	select HAVE_ARCH_AUDITSYSCALL
	select HAVE_ARCH_MMAP_RND_BITS if MMU
	select HAVE_ARCH_SECCOMP_FILTER
	select HAVE_ARCH_TRACEHOOK
	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
	select HAVE_ASM_MODVERSIONS
	select HAVE_CONTEXT_TRACKING_USER
	select HAVE_DEBUG_STACKOVERFLOW
	select HAVE_DMA_CONTIGUOUS
	select HAVE_EXIT_THREAD
	select HAVE_FAST_GUP
	select HAVE_GENERIC_VDSO
	select HAVE_IOREMAP_PROT
	select HAVE_IRQ_EXIT_ON_IRQ_STACK
	select HAVE_IRQ_TIME_ACCOUNTING
	select HAVE_MOD_ARCH_SPECIFIC
	select HAVE_NMI
	select HAVE_PCI
	select HAVE_PERF_EVENTS
	select HAVE_REGS_AND_STACK_ACCESS_API
	select HAVE_RSEQ
	select HAVE_SETUP_PER_CPU_AREA if NUMA
	select HAVE_SYSCALL_TRACEPOINTS
	select HAVE_TIF_NOHZ
	select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP
	select IRQ_FORCED_THREADING
	select IRQ_LOONGARCH_CPU
	select MMU_GATHER_MERGE_VMAS if MMU
	select MODULES_USE_ELF_RELA if MODULES
	select NEED_PER_CPU_EMBED_FIRST_CHUNK
	select NEED_PER_CPU_PAGE_FIRST_CHUNK
	select OF
	select OF_EARLY_FLATTREE
	select PCI
	select PCI_DOMAINS_GENERIC
	select PCI_ECAM if ACPI
	select PCI_LOONGSON
	select PCI_MSI_ARCH_FALLBACKS
	select PCI_QUIRKS
	select PERF_USE_VMALLOC
	select RTC_LIB
	select SMP
	select SPARSE_IRQ
	select SYSCTL_EXCEPTION_TRACE
	select SWIOTLB
	select TRACE_IRQFLAGS_SUPPORT
	select USE_PERCPU_NUMA_NODE_ID
	select USER_STACKTRACE_SUPPORT
	select ZONE_DMA32

	config 32BIT
	bool

	config 64BIT
	def_bool y

	config CPU_HAS_FPU
	bool
	default y

	config CPU_HAS_PREFETCH
	bool
	default y

	config GENERIC_CALIBRATE_DELAY
	def_bool y

	config GENERIC_CSUM
	def_bool y

	config GENERIC_HWEIGHT
	def_bool y

	config L1_CACHE_SHIFT
	int
	default "6"

	config LOCKDEP_SUPPORT
	bool
	default y

	config STACKTRACE_SUPPORT
	bool
	default y

	# MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the
	# MIPS Loongson code, to preserve Loongson-specific code paths in drivers that
	# are shared between architectures, and specifically expecting the symbols.
	config MACH_LOONGSON32
	def_bool 32BIT

	config MACH_LOONGSON64
	def_bool 64BIT

	config PAGE_SIZE_4KB
	bool

	config PAGE_SIZE_16KB
	bool

	config PAGE_SIZE_64KB
	bool

	config PGTABLE_2LEVEL
	bool

	config PGTABLE_3LEVEL
	bool

	config PGTABLE_4LEVEL
	bool

	config PGTABLE_LEVELS
	int
	default 2 if PGTABLE_2LEVEL
	default 3 if PGTABLE_3LEVEL
	default 4 if PGTABLE_4LEVEL

	config SCHED_OMIT_FRAME_POINTER
	bool
	default y

	menu "Kernel type and options"

	source "kernel/Kconfig.hz"

	choice
	prompt "Page Table Layout"
	default 16KB_2LEVEL if 32BIT
	default 16KB_3LEVEL if 64BIT
	help
	Allows choosing the page table layout, which is a combination
	of page size and page table levels. The size of virtual memory
	address space are determined by the page table layout.

	config 4KB_3LEVEL
	bool "4KB with 3 levels"
	select PAGE_SIZE_4KB
	select PGTABLE_3LEVEL
	help
	This option selects 4KB page size with 3 level page tables, which
	support a maximum of 39 bits of application virtual memory.

	config 4KB_4LEVEL
	bool "4KB with 4 levels"
	select PAGE_SIZE_4KB
	select PGTABLE_4LEVEL
	help
	This option selects 4KB page size with 4 level page tables, which
	support a maximum of 48 bits of application virtual memory.

	config 16KB_2LEVEL
	bool "16KB with 2 levels"
	select PAGE_SIZE_16KB
	select PGTABLE_2LEVEL
	help
	This option selects 16KB page size with 2 level page tables, which
	support a maximum of 36 bits of application virtual memory.

	config 16KB_3LEVEL
	bool "16KB with 3 levels"
	select PAGE_SIZE_16KB
	select PGTABLE_3LEVEL
	help
	This option selects 16KB page size with 3 level page tables, which
	support a maximum of 47 bits of application virtual memory.

	config 64KB_2LEVEL
	bool "64KB with 2 levels"
	select PAGE_SIZE_64KB
	select PGTABLE_2LEVEL
	help
	This option selects 64KB page size with 2 level page tables, which
	support a maximum of 42 bits of application virtual memory.

	config 64KB_3LEVEL
	bool "64KB with 3 levels"
	select PAGE_SIZE_64KB
	select PGTABLE_3LEVEL
	help
	This option selects 64KB page size with 3 level page tables, which
	support a maximum of 55 bits of application virtual memory.

	endchoice

	config CMDLINE
	string "Built-in kernel command line"
	help
	For most platforms, the arguments for the kernel's command line
	are provided at run-time, during boot. However, there are cases
	where either no arguments are being provided or the provided
	arguments are insufficient or even invalid.

	When that occurs, it is possible to define a built-in command
	line here and choose how the kernel should use it later on.

	choice
	prompt "Kernel command line type"
	default CMDLINE_BOOTLOADER
	help
	Choose how the kernel will handle the provided built-in command
	line.

	config CMDLINE_BOOTLOADER
	bool "Use bootloader kernel arguments if available"
	help
	Prefer the command-line passed by the boot loader if available.
	Use the built-in command line as fallback in case we get nothing
	during boot. This is the default behaviour.

	config CMDLINE_EXTEND
	bool "Use built-in to extend bootloader kernel arguments"
	help
	The command-line arguments provided during boot will be
	appended to the built-in command line. This is useful in
	cases where the provided arguments are insufficient and
	you don't want to or cannot modify them.

	config CMDLINE_FORCE
	bool "Always use the built-in kernel command string"
	help
	Always use the built-in command line, even if we get one during
	boot. This is useful in case you need to override the provided
	command line on systems where you don't have or want control
	over it.

	endchoice

	config DMI
	bool "Enable DMI scanning"
	select DMI_SCAN_MACHINE_NON_EFI_FALLBACK
	default y
	help
	This enables SMBIOS/DMI feature for systems, and scanning of
	DMI to identify machine quirks.

	config EFI
	bool "EFI runtime service support"
	select UCS2_STRING
	select EFI_PARAMS_FROM_FDT
	select EFI_RUNTIME_WRAPPERS
	help
	This enables the kernel to use EFI runtime services that are
	available (such as the EFI variable services).

	config SMP
	bool "Multi-Processing support"
	help
	This enables support for systems with more than one CPU. If you have
	a system with only one CPU, say N. If you have a system with more
	than one CPU, say Y.

	If you say N here, the kernel will run on uni- 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,
	uniprocessor machines. On a uniprocessor machine, the kernel
	will run faster if you say N here.

	See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>.

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

	config HOTPLUG_CPU
	bool "Support for hot-pluggable CPUs"
	depends on SMP
	select GENERIC_IRQ_MIGRATION
	help
	Say Y here to allow turning CPUs off and on. CPUs can be
	controlled through /sys/devices/system/cpu.
	(Note: power management support will enable this option
	automatically on SMP systems. )
	Say N if you want to disable CPU hotplug.

	config NR_CPUS
	int "Maximum number of CPUs (2-256)"
	range 2 256
	depends on SMP
	default "64"
	help
	This allows you to specify the maximum number of CPUs which this
	kernel will support.

	config NUMA
	bool "NUMA Support"
	select SMP
	select ACPI_NUMA if ACPI
	help
	Say Y to compile the kernel with NUMA (Non-Uniform Memory Access)
	support. This option improves performance on systems with more
	than one NUMA node; on single node systems it is generally better
	to leave it disabled.

	config NODES_SHIFT
	int
	default "6"
	depends on NUMA

	config FORCE_MAX_ZONEORDER
	int "Maximum zone order"
	range 14 64 if PAGE_SIZE_64KB
	default "14" if PAGE_SIZE_64KB
	range 12 64 if PAGE_SIZE_16KB
	default "12" if PAGE_SIZE_16KB
	range 11 64
	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.

	The page size is not necessarily 4KB. Keep this in mind
	when choosing a value for this option.

	config SECCOMP
	bool "Enable seccomp to safely compute untrusted bytecode"
	depends on PROC_FS
	default y
	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 /proc/<pid>/seccomp, it cannot be disabled
	and the task is only allowed to execute a few safe syscalls
	defined by each seccomp mode.

	If unsure, say Y. Only embedded should say N here.

	endmenu

	config ARCH_SELECT_MEMORY_MODEL
	def_bool y

	config ARCH_FLATMEM_ENABLE
	def_bool y
	depends on !NUMA

	config ARCH_SPARSEMEM_ENABLE
	def_bool y
	help
	Say Y to support efficient handling of sparse physical memory,
	for architectures which are either NUMA (Non-Uniform Memory Access)
	or have huge holes in the physical address space for other reasons.
	See <file:Documentation/mm/numa.rst> for more.

	config ARCH_ENABLE_THP_MIGRATION
	def_bool y
	depends on TRANSPARENT_HUGEPAGE

	config ARCH_MEMORY_PROBE
	def_bool y
	depends on MEMORY_HOTPLUG

	config MMU
	bool
	default y

	config ARCH_MMAP_RND_BITS_MIN
	default 12

	config ARCH_MMAP_RND_BITS_MAX
	default 18

	menu "Power management options"

	source "drivers/acpi/Kconfig"

	endmenu

	source "drivers/firmware/Kconfig"