| # 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_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 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" |
