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+# 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_NON_OVERLAPPING_ADDRESS_SPACE
+ 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_USE_QUEUED_SPINLOCKS
+ 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_IOREMAP if !ARCH_IOREMAP
+ 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_LIB_DEVMEM_IS_ALLOWED
+ 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_EBPF_JIT
+ 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_PERF_REGS
+ select HAVE_PERF_USER_STACK_DUMP
+ 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 LOCK_MM_AND_FIND_VMA
+ 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 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_BUG
+ def_bool y
+ depends on BUG
+
+config GENERIC_BUG_RELATIVE_POINTERS
+ def_bool y
+ depends on GENERIC_BUG
+
+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 deliberately 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 FIX_EARLYCON_MEM
+ def_bool y
+
+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
+
+config AS_HAS_EXPLICIT_RELOCS
+ def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x))
+
+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_RUNTIME_WRAPPERS
+ help
+ This enables the kernel to use EFI runtime services that are
+ available (such as the EFI variable services).
+
+config EFI_STUB
+ bool "EFI boot stub support"
+ default y
+ depends on EFI
+ select EFI_GENERIC_STUB
+ help
+ This kernel feature allows the kernel to be loaded directly by
+ EFI firmware without the use of a bootloader.
+
+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 ARCH_FORCE_MAX_ORDER
+ 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 ARCH_IOREMAP
+ bool "Enable LoongArch DMW-based ioremap()"
+ help
+ We use generic TLB-based ioremap() by default since it has page
+ protection support. However, you can enable LoongArch DMW-based
+ ioremap() for better performance.
+
+config KEXEC
+ bool "Kexec system call"
+ select KEXEC_CORE
+ help
+ kexec is a system call that implements the ability to shutdown your
+ current kernel, and to start another kernel. It is like a reboot
+ but it is independent of the system firmware. And like a reboot
+ you can start any kernel with it, not just Linux.
+
+ The name comes from the similarity to the exec system call.
+
+config CRASH_DUMP
+ bool "Build kdump crash kernel"
+ help
+ Generate crash dump after being started by kexec. This should
+ be normally only set in special crash dump kernels which are
+ loaded in the main kernel with kexec-tools into a specially
+ reserved region and then later executed after a crash by
+ kdump/kexec.
+
+ For more details see Documentation/admin-guide/kdump/kdump.rst
+
+config PHYSICAL_START
+ hex "Physical address where the kernel is loaded"
+ default "0x90000000a0000000"
+ depends on CRASH_DUMP
+ help
+ This gives the XKPRANGE address where the kernel is loaded.
+ If you plan to use kernel for capturing the crash dump change
+ this value to start of the reserved region (the "X" value as
+ specified in the "crashkernel=YM@XM" command line boot parameter
+ passed to the panic-ed kernel).
+
+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"