1 # SPDX-License-Identifier: GPL-2.0
6 select ACPI_GENERIC_GSI if ACPI
7 select ACPI_MCFG if ACPI
8 select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
9 select ARCH_BINFMT_ELF_STATE
10 select ARCH_ENABLE_MEMORY_HOTPLUG
11 select ARCH_ENABLE_MEMORY_HOTREMOVE
12 select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
13 select ARCH_HAS_PHYS_TO_DMA
14 select ARCH_HAS_PTE_SPECIAL
15 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
16 select ARCH_INLINE_READ_LOCK if !PREEMPTION
17 select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION
18 select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION
19 select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION
20 select ARCH_INLINE_READ_UNLOCK if !PREEMPTION
21 select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION
22 select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION
23 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION
24 select ARCH_INLINE_WRITE_LOCK if !PREEMPTION
25 select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION
26 select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION
27 select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION
28 select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION
29 select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION
30 select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION
31 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION
32 select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION
33 select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION
34 select ARCH_INLINE_SPIN_LOCK if !PREEMPTION
35 select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION
36 select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION
37 select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION
38 select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION
39 select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION
40 select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION
41 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
42 select ARCH_KEEP_MEMBLOCK
43 select ARCH_MIGHT_HAVE_PC_PARPORT
44 select ARCH_MIGHT_HAVE_PC_SERIO
45 select ARCH_SPARSEMEM_ENABLE
47 select ARCH_SUPPORTS_ACPI
48 select ARCH_SUPPORTS_ATOMIC_RMW
49 select ARCH_SUPPORTS_HUGETLBFS
50 select ARCH_SUPPORTS_NUMA_BALANCING
51 select ARCH_USE_BUILTIN_BSWAP
52 select ARCH_USE_CMPXCHG_LOCKREF
53 select ARCH_USE_QUEUED_RWLOCKS
54 select ARCH_USE_QUEUED_SPINLOCKS
55 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
56 select ARCH_WANT_LD_ORPHAN_WARN
57 select ARCH_WANTS_NO_INSTR
58 select BUILDTIME_TABLE_SORT
61 select GENERIC_CLOCKEVENTS
62 select GENERIC_CMOS_UPDATE
63 select GENERIC_CPU_AUTOPROBE
65 select GENERIC_GETTIMEOFDAY
66 select GENERIC_IOREMAP if !ARCH_IOREMAP
67 select GENERIC_IRQ_MULTI_HANDLER
68 select GENERIC_IRQ_PROBE
69 select GENERIC_IRQ_SHOW
70 select GENERIC_LIB_ASHLDI3
71 select GENERIC_LIB_ASHRDI3
72 select GENERIC_LIB_CMPDI2
73 select GENERIC_LIB_LSHRDI3
74 select GENERIC_LIB_UCMPDI2
75 select GENERIC_LIB_DEVMEM_IS_ALLOWED
76 select GENERIC_PCI_IOMAP
77 select GENERIC_SCHED_CLOCK
78 select GENERIC_SMP_IDLE_THREAD
79 select GENERIC_TIME_VSYSCALL
81 select HAVE_ARCH_AUDITSYSCALL
82 select HAVE_ARCH_MMAP_RND_BITS if MMU
83 select HAVE_ARCH_SECCOMP_FILTER
84 select HAVE_ARCH_TRACEHOOK
85 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
86 select HAVE_ASM_MODVERSIONS
87 select HAVE_CONTEXT_TRACKING_USER
88 select HAVE_DEBUG_STACKOVERFLOW
89 select HAVE_DMA_CONTIGUOUS
90 select HAVE_EXIT_THREAD
92 select HAVE_GENERIC_VDSO
93 select HAVE_IOREMAP_PROT
94 select HAVE_IRQ_EXIT_ON_IRQ_STACK
95 select HAVE_IRQ_TIME_ACCOUNTING
96 select HAVE_MOD_ARCH_SPECIFIC
99 select HAVE_PERF_EVENTS
100 select HAVE_REGS_AND_STACK_ACCESS_API
102 select HAVE_SETUP_PER_CPU_AREA if NUMA
103 select HAVE_SYSCALL_TRACEPOINTS
105 select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP
106 select IRQ_FORCED_THREADING
107 select IRQ_LOONGARCH_CPU
108 select MMU_GATHER_MERGE_VMAS if MMU
109 select MODULES_USE_ELF_RELA if MODULES
110 select NEED_PER_CPU_EMBED_FIRST_CHUNK
111 select NEED_PER_CPU_PAGE_FIRST_CHUNK
113 select PCI_DOMAINS_GENERIC
114 select PCI_ECAM if ACPI
116 select PCI_MSI_ARCH_FALLBACKS
118 select PERF_USE_VMALLOC
122 select SYSCTL_EXCEPTION_TRACE
124 select TRACE_IRQFLAGS_SUPPORT
125 select USE_PERCPU_NUMA_NODE_ID
126 select USER_STACKTRACE_SUPPORT
139 config CPU_HAS_PREFETCH
143 config GENERIC_CALIBRATE_DELAY
149 config GENERIC_HWEIGHT
152 config L1_CACHE_SHIFT
156 config LOCKDEP_SUPPORT
160 config STACKTRACE_SUPPORT
164 # MACH_LOONGSON32 and MACH_LOONGSON64 are deliberately carried over from the
165 # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that
166 # are shared between architectures, and specifically expecting the symbols.
167 config MACH_LOONGSON32
170 config MACH_LOONGSON64
173 config FIX_EARLYCON_MEM
179 config PAGE_SIZE_16KB
182 config PAGE_SIZE_64KB
185 config PGTABLE_2LEVEL
188 config PGTABLE_3LEVEL
191 config PGTABLE_4LEVEL
194 config PGTABLE_LEVELS
196 default 2 if PGTABLE_2LEVEL
197 default 3 if PGTABLE_3LEVEL
198 default 4 if PGTABLE_4LEVEL
200 config SCHED_OMIT_FRAME_POINTER
204 config AS_HAS_EXPLICIT_RELOCS
205 def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x))
207 menu "Kernel type and options"
209 source "kernel/Kconfig.hz"
212 prompt "Page Table Layout"
213 default 16KB_2LEVEL if 32BIT
214 default 16KB_3LEVEL if 64BIT
216 Allows choosing the page table layout, which is a combination
217 of page size and page table levels. The size of virtual memory
218 address space are determined by the page table layout.
221 bool "4KB with 3 levels"
223 select PGTABLE_3LEVEL
225 This option selects 4KB page size with 3 level page tables, which
226 support a maximum of 39 bits of application virtual memory.
229 bool "4KB with 4 levels"
231 select PGTABLE_4LEVEL
233 This option selects 4KB page size with 4 level page tables, which
234 support a maximum of 48 bits of application virtual memory.
237 bool "16KB with 2 levels"
238 select PAGE_SIZE_16KB
239 select PGTABLE_2LEVEL
241 This option selects 16KB page size with 2 level page tables, which
242 support a maximum of 36 bits of application virtual memory.
245 bool "16KB with 3 levels"
246 select PAGE_SIZE_16KB
247 select PGTABLE_3LEVEL
249 This option selects 16KB page size with 3 level page tables, which
250 support a maximum of 47 bits of application virtual memory.
253 bool "64KB with 2 levels"
254 select PAGE_SIZE_64KB
255 select PGTABLE_2LEVEL
257 This option selects 64KB page size with 2 level page tables, which
258 support a maximum of 42 bits of application virtual memory.
261 bool "64KB with 3 levels"
262 select PAGE_SIZE_64KB
263 select PGTABLE_3LEVEL
265 This option selects 64KB page size with 3 level page tables, which
266 support a maximum of 55 bits of application virtual memory.
271 string "Built-in kernel command line"
273 For most platforms, the arguments for the kernel's command line
274 are provided at run-time, during boot. However, there are cases
275 where either no arguments are being provided or the provided
276 arguments are insufficient or even invalid.
278 When that occurs, it is possible to define a built-in command
279 line here and choose how the kernel should use it later on.
282 prompt "Kernel command line type"
283 default CMDLINE_BOOTLOADER
285 Choose how the kernel will handle the provided built-in command
288 config CMDLINE_BOOTLOADER
289 bool "Use bootloader kernel arguments if available"
291 Prefer the command-line passed by the boot loader if available.
292 Use the built-in command line as fallback in case we get nothing
293 during boot. This is the default behaviour.
295 config CMDLINE_EXTEND
296 bool "Use built-in to extend bootloader kernel arguments"
298 The command-line arguments provided during boot will be
299 appended to the built-in command line. This is useful in
300 cases where the provided arguments are insufficient and
301 you don't want to or cannot modify them.
304 bool "Always use the built-in kernel command string"
306 Always use the built-in command line, even if we get one during
307 boot. This is useful in case you need to override the provided
308 command line on systems where you don't have or want control
314 bool "Enable DMI scanning"
315 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK
318 This enables SMBIOS/DMI feature for systems, and scanning of
319 DMI to identify machine quirks.
322 bool "EFI runtime service support"
324 select EFI_RUNTIME_WRAPPERS
326 This enables the kernel to use EFI runtime services that are
327 available (such as the EFI variable services).
330 bool "EFI boot stub support"
333 select EFI_GENERIC_STUB
335 This kernel feature allows the kernel to be loaded directly by
336 EFI firmware without the use of a bootloader.
339 bool "Multi-Processing support"
341 This enables support for systems with more than one CPU. If you have
342 a system with only one CPU, say N. If you have a system with more
345 If you say N here, the kernel will run on uni- and multiprocessor
346 machines, but will use only one CPU of a multiprocessor machine. If
347 you say Y here, the kernel will run on many, but not all,
348 uniprocessor machines. On a uniprocessor machine, the kernel
349 will run faster if you say N here.
351 See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>.
353 If you don't know what to do here, say N.
356 bool "Support for hot-pluggable CPUs"
358 select GENERIC_IRQ_MIGRATION
360 Say Y here to allow turning CPUs off and on. CPUs can be
361 controlled through /sys/devices/system/cpu.
362 (Note: power management support will enable this option
363 automatically on SMP systems. )
364 Say N if you want to disable CPU hotplug.
367 int "Maximum number of CPUs (2-256)"
372 This allows you to specify the maximum number of CPUs which this
378 select ACPI_NUMA if ACPI
380 Say Y to compile the kernel with NUMA (Non-Uniform Memory Access)
381 support. This option improves performance on systems with more
382 than one NUMA node; on single node systems it is generally better
383 to leave it disabled.
390 config FORCE_MAX_ZONEORDER
391 int "Maximum zone order"
392 range 14 64 if PAGE_SIZE_64KB
393 default "14" if PAGE_SIZE_64KB
394 range 12 64 if PAGE_SIZE_16KB
395 default "12" if PAGE_SIZE_16KB
399 The kernel memory allocator divides physically contiguous memory
400 blocks into "zones", where each zone is a power of two number of
401 pages. This option selects the largest power of two that the kernel
402 keeps in the memory allocator. If you need to allocate very large
403 blocks of physically contiguous memory, then you may need to
406 This config option is actually maximum order plus one. For example,
407 a value of 11 means that the largest free memory block is 2^10 pages.
409 The page size is not necessarily 4KB. Keep this in mind
410 when choosing a value for this option.
413 bool "Enable LoongArch DMW-based ioremap()"
415 We use generic TLB-based ioremap() by default since it has page
416 protection support. However, you can enable LoongArch DMW-based
417 ioremap() for better performance.
420 bool "Enable seccomp to safely compute untrusted bytecode"
424 This kernel feature is useful for number crunching applications
425 that may need to compute untrusted bytecode during their
426 execution. By using pipes or other transports made available to
427 the process as file descriptors supporting the read/write
428 syscalls, it's possible to isolate those applications in
429 their own address space using seccomp. Once seccomp is
430 enabled via /proc/<pid>/seccomp, it cannot be disabled
431 and the task is only allowed to execute a few safe syscalls
432 defined by each seccomp mode.
434 If unsure, say Y. Only embedded should say N here.
438 config ARCH_SELECT_MEMORY_MODEL
441 config ARCH_FLATMEM_ENABLE
445 config ARCH_SPARSEMEM_ENABLE
448 Say Y to support efficient handling of sparse physical memory,
449 for architectures which are either NUMA (Non-Uniform Memory Access)
450 or have huge holes in the physical address space for other reasons.
451 See <file:Documentation/mm/numa.rst> for more.
453 config ARCH_ENABLE_THP_MIGRATION
455 depends on TRANSPARENT_HUGEPAGE
457 config ARCH_MEMORY_PROBE
459 depends on MEMORY_HOTPLUG
465 config ARCH_MMAP_RND_BITS_MIN
468 config ARCH_MMAP_RND_BITS_MAX
471 menu "Power management options"
473 source "drivers/acpi/Kconfig"
477 source "drivers/firmware/Kconfig"