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_PTE_SPECIAL
14 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
15 select ARCH_INLINE_READ_LOCK if !PREEMPTION
16 select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION
17 select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION
18 select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION
19 select ARCH_INLINE_READ_UNLOCK if !PREEMPTION
20 select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION
21 select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION
22 select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION
23 select ARCH_INLINE_WRITE_LOCK if !PREEMPTION
24 select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION
25 select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION
26 select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION
27 select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION
28 select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION
29 select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION
30 select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION
31 select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION
32 select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION
33 select ARCH_INLINE_SPIN_LOCK if !PREEMPTION
34 select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION
35 select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION
36 select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION
37 select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION
38 select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION
39 select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION
40 select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
41 select ARCH_KEEP_MEMBLOCK
42 select ARCH_MIGHT_HAVE_PC_PARPORT
43 select ARCH_MIGHT_HAVE_PC_SERIO
44 select ARCH_SPARSEMEM_ENABLE
46 select ARCH_SUPPORTS_ACPI
47 select ARCH_SUPPORTS_ATOMIC_RMW
48 select ARCH_SUPPORTS_HUGETLBFS
49 select ARCH_SUPPORTS_NUMA_BALANCING
50 select ARCH_USE_BUILTIN_BSWAP
51 select ARCH_USE_CMPXCHG_LOCKREF
52 select ARCH_USE_QUEUED_RWLOCKS
53 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
54 select ARCH_WANT_LD_ORPHAN_WARN
55 select ARCH_WANTS_NO_INSTR
56 select BUILDTIME_TABLE_SORT
59 select GENERIC_CLOCKEVENTS
60 select GENERIC_CMOS_UPDATE
61 select GENERIC_CPU_AUTOPROBE
63 select GENERIC_GETTIMEOFDAY
64 select GENERIC_IRQ_MULTI_HANDLER
65 select GENERIC_IRQ_PROBE
66 select GENERIC_IRQ_SHOW
67 select GENERIC_LIB_ASHLDI3
68 select GENERIC_LIB_ASHRDI3
69 select GENERIC_LIB_CMPDI2
70 select GENERIC_LIB_LSHRDI3
71 select GENERIC_LIB_UCMPDI2
72 select GENERIC_PCI_IOMAP
73 select GENERIC_SCHED_CLOCK
74 select GENERIC_SMP_IDLE_THREAD
75 select GENERIC_TIME_VSYSCALL
77 select HAVE_ARCH_AUDITSYSCALL
78 select HAVE_ARCH_MMAP_RND_BITS if MMU
79 select HAVE_ARCH_SECCOMP_FILTER
80 select HAVE_ARCH_TRACEHOOK
81 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
82 select HAVE_ASM_MODVERSIONS
83 select HAVE_CONTEXT_TRACKING_USER
84 select HAVE_DEBUG_STACKOVERFLOW
85 select HAVE_DMA_CONTIGUOUS
86 select HAVE_EXIT_THREAD
88 select HAVE_GENERIC_VDSO
89 select HAVE_IOREMAP_PROT
90 select HAVE_IRQ_EXIT_ON_IRQ_STACK
91 select HAVE_IRQ_TIME_ACCOUNTING
92 select HAVE_MOD_ARCH_SPECIFIC
95 select HAVE_PERF_EVENTS
96 select HAVE_REGS_AND_STACK_ACCESS_API
98 select HAVE_SETUP_PER_CPU_AREA if NUMA
99 select HAVE_SYSCALL_TRACEPOINTS
101 select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP
102 select IRQ_FORCED_THREADING
103 select IRQ_LOONGARCH_CPU
104 select MMU_GATHER_MERGE_VMAS if MMU
105 select MODULES_USE_ELF_RELA if MODULES
106 select NEED_PER_CPU_EMBED_FIRST_CHUNK
107 select NEED_PER_CPU_PAGE_FIRST_CHUNK
109 select PCI_DOMAINS_GENERIC
110 select PCI_ECAM if ACPI
112 select PCI_MSI_ARCH_FALLBACKS
114 select PERF_USE_VMALLOC
118 select SYSCTL_EXCEPTION_TRACE
120 select TRACE_IRQFLAGS_SUPPORT
121 select USE_PERCPU_NUMA_NODE_ID
122 select USER_STACKTRACE_SUPPORT
135 config CPU_HAS_PREFETCH
139 config GENERIC_CALIBRATE_DELAY
145 config GENERIC_HWEIGHT
148 config L1_CACHE_SHIFT
152 config LOCKDEP_SUPPORT
156 config STACKTRACE_SUPPORT
160 # MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the
161 # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that
162 # are shared between architectures, and specifically expecting the symbols.
163 config MACH_LOONGSON32
166 config MACH_LOONGSON64
172 config PAGE_SIZE_16KB
175 config PAGE_SIZE_64KB
178 config PGTABLE_2LEVEL
181 config PGTABLE_3LEVEL
184 config PGTABLE_4LEVEL
187 config PGTABLE_LEVELS
189 default 2 if PGTABLE_2LEVEL
190 default 3 if PGTABLE_3LEVEL
191 default 4 if PGTABLE_4LEVEL
193 config SCHED_OMIT_FRAME_POINTER
197 menu "Kernel type and options"
199 source "kernel/Kconfig.hz"
202 prompt "Page Table Layout"
203 default 16KB_2LEVEL if 32BIT
204 default 16KB_3LEVEL if 64BIT
206 Allows choosing the page table layout, which is a combination
207 of page size and page table levels. The size of virtual memory
208 address space are determined by the page table layout.
211 bool "4KB with 3 levels"
213 select PGTABLE_3LEVEL
215 This option selects 4KB page size with 3 level page tables, which
216 support a maximum of 39 bits of application virtual memory.
219 bool "4KB with 4 levels"
221 select PGTABLE_4LEVEL
223 This option selects 4KB page size with 4 level page tables, which
224 support a maximum of 48 bits of application virtual memory.
227 bool "16KB with 2 levels"
228 select PAGE_SIZE_16KB
229 select PGTABLE_2LEVEL
231 This option selects 16KB page size with 2 level page tables, which
232 support a maximum of 36 bits of application virtual memory.
235 bool "16KB with 3 levels"
236 select PAGE_SIZE_16KB
237 select PGTABLE_3LEVEL
239 This option selects 16KB page size with 3 level page tables, which
240 support a maximum of 47 bits of application virtual memory.
243 bool "64KB with 2 levels"
244 select PAGE_SIZE_64KB
245 select PGTABLE_2LEVEL
247 This option selects 64KB page size with 2 level page tables, which
248 support a maximum of 42 bits of application virtual memory.
251 bool "64KB with 3 levels"
252 select PAGE_SIZE_64KB
253 select PGTABLE_3LEVEL
255 This option selects 64KB page size with 3 level page tables, which
256 support a maximum of 55 bits of application virtual memory.
261 string "Built-in kernel command line"
263 For most platforms, the arguments for the kernel's command line
264 are provided at run-time, during boot. However, there are cases
265 where either no arguments are being provided or the provided
266 arguments are insufficient or even invalid.
268 When that occurs, it is possible to define a built-in command
269 line here and choose how the kernel should use it later on.
272 prompt "Kernel command line type"
273 default CMDLINE_BOOTLOADER
275 Choose how the kernel will handle the provided built-in command
278 config CMDLINE_BOOTLOADER
279 bool "Use bootloader kernel arguments if available"
281 Prefer the command-line passed by the boot loader if available.
282 Use the built-in command line as fallback in case we get nothing
283 during boot. This is the default behaviour.
285 config CMDLINE_EXTEND
286 bool "Use built-in to extend bootloader kernel arguments"
288 The command-line arguments provided during boot will be
289 appended to the built-in command line. This is useful in
290 cases where the provided arguments are insufficient and
291 you don't want to or cannot modify them.
294 bool "Always use the built-in kernel command string"
296 Always use the built-in command line, even if we get one during
297 boot. This is useful in case you need to override the provided
298 command line on systems where you don't have or want control
304 bool "Enable DMI scanning"
305 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK
308 This enables SMBIOS/DMI feature for systems, and scanning of
309 DMI to identify machine quirks.
312 bool "EFI runtime service support"
314 select EFI_RUNTIME_WRAPPERS
316 This enables the kernel to use EFI runtime services that are
317 available (such as the EFI variable services).
320 bool "EFI boot stub support"
323 select EFI_GENERIC_STUB
325 This kernel feature allows the kernel to be loaded directly by
326 EFI firmware without the use of a bootloader.
329 bool "Multi-Processing support"
331 This enables support for systems with more than one CPU. If you have
332 a system with only one CPU, say N. If you have a system with more
335 If you say N here, the kernel will run on uni- and multiprocessor
336 machines, but will use only one CPU of a multiprocessor machine. If
337 you say Y here, the kernel will run on many, but not all,
338 uniprocessor machines. On a uniprocessor machine, the kernel
339 will run faster if you say N here.
341 See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>.
343 If you don't know what to do here, say N.
346 bool "Support for hot-pluggable CPUs"
348 select GENERIC_IRQ_MIGRATION
350 Say Y here to allow turning CPUs off and on. CPUs can be
351 controlled through /sys/devices/system/cpu.
352 (Note: power management support will enable this option
353 automatically on SMP systems. )
354 Say N if you want to disable CPU hotplug.
357 int "Maximum number of CPUs (2-256)"
362 This allows you to specify the maximum number of CPUs which this
368 select ACPI_NUMA if ACPI
370 Say Y to compile the kernel with NUMA (Non-Uniform Memory Access)
371 support. This option improves performance on systems with more
372 than one NUMA node; on single node systems it is generally better
373 to leave it disabled.
380 config FORCE_MAX_ZONEORDER
381 int "Maximum zone order"
382 range 14 64 if PAGE_SIZE_64KB
383 default "14" if PAGE_SIZE_64KB
384 range 12 64 if PAGE_SIZE_16KB
385 default "12" if PAGE_SIZE_16KB
389 The kernel memory allocator divides physically contiguous memory
390 blocks into "zones", where each zone is a power of two number of
391 pages. This option selects the largest power of two that the kernel
392 keeps in the memory allocator. If you need to allocate very large
393 blocks of physically contiguous memory, then you may need to
396 This config option is actually maximum order plus one. For example,
397 a value of 11 means that the largest free memory block is 2^10 pages.
399 The page size is not necessarily 4KB. Keep this in mind
400 when choosing a value for this option.
403 bool "Enable seccomp to safely compute untrusted bytecode"
407 This kernel feature is useful for number crunching applications
408 that may need to compute untrusted bytecode during their
409 execution. By using pipes or other transports made available to
410 the process as file descriptors supporting the read/write
411 syscalls, it's possible to isolate those applications in
412 their own address space using seccomp. Once seccomp is
413 enabled via /proc/<pid>/seccomp, it cannot be disabled
414 and the task is only allowed to execute a few safe syscalls
415 defined by each seccomp mode.
417 If unsure, say Y. Only embedded should say N here.
421 config ARCH_SELECT_MEMORY_MODEL
424 config ARCH_FLATMEM_ENABLE
428 config ARCH_SPARSEMEM_ENABLE
431 Say Y to support efficient handling of sparse physical memory,
432 for architectures which are either NUMA (Non-Uniform Memory Access)
433 or have huge holes in the physical address space for other reasons.
434 See <file:Documentation/mm/numa.rst> for more.
436 config ARCH_ENABLE_THP_MIGRATION
438 depends on TRANSPARENT_HUGEPAGE
440 config ARCH_MEMORY_PROBE
442 depends on MEMORY_HOTPLUG
448 config ARCH_MMAP_RND_BITS_MIN
451 config ARCH_MMAP_RND_BITS_MAX
454 menu "Power management options"
456 source "drivers/acpi/Kconfig"
460 source "drivers/firmware/Kconfig"