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_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_WANTS_NO_INSTR
55 select BUILDTIME_TABLE_SORT
58 select GENERIC_CLOCKEVENTS
59 select GENERIC_CMOS_UPDATE
60 select GENERIC_CPU_AUTOPROBE
62 select GENERIC_GETTIMEOFDAY
63 select GENERIC_IRQ_MULTI_HANDLER
64 select GENERIC_IRQ_PROBE
65 select GENERIC_IRQ_SHOW
66 select GENERIC_LIB_ASHLDI3
67 select GENERIC_LIB_ASHRDI3
68 select GENERIC_LIB_CMPDI2
69 select GENERIC_LIB_LSHRDI3
70 select GENERIC_LIB_UCMPDI2
71 select GENERIC_PCI_IOMAP
72 select GENERIC_SCHED_CLOCK
73 select GENERIC_SMP_IDLE_THREAD
74 select GENERIC_TIME_VSYSCALL
76 select HAVE_ARCH_AUDITSYSCALL
77 select HAVE_ARCH_MMAP_RND_BITS if MMU
78 select HAVE_ARCH_SECCOMP_FILTER
79 select HAVE_ARCH_TRACEHOOK
80 select HAVE_ARCH_TRANSPARENT_HUGEPAGE
81 select HAVE_ASM_MODVERSIONS
82 select HAVE_CONTEXT_TRACKING
83 select HAVE_DEBUG_STACKOVERFLOW
84 select HAVE_DMA_CONTIGUOUS
85 select HAVE_EXIT_THREAD
87 select HAVE_GENERIC_VDSO
88 select HAVE_IOREMAP_PROT
89 select HAVE_IRQ_EXIT_ON_IRQ_STACK
90 select HAVE_IRQ_TIME_ACCOUNTING
91 select HAVE_MOD_ARCH_SPECIFIC
94 select HAVE_PERF_EVENTS
95 select HAVE_REGS_AND_STACK_ACCESS_API
97 select HAVE_SETUP_PER_CPU_AREA if NUMA
98 select HAVE_SYSCALL_TRACEPOINTS
100 select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP
101 select IRQ_FORCED_THREADING
102 select IRQ_LOONGARCH_CPU
103 select MMU_GATHER_MERGE_VMAS if MMU
104 select MODULES_USE_ELF_RELA if MODULES
105 select NEED_PER_CPU_EMBED_FIRST_CHUNK
106 select NEED_PER_CPU_PAGE_FIRST_CHUNK
108 select OF_EARLY_FLATTREE
110 select PCI_DOMAINS_GENERIC
111 select PCI_ECAM if ACPI
113 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
134 config CPU_HAS_PREFETCH
138 config GENERIC_CALIBRATE_DELAY
144 config GENERIC_HWEIGHT
147 config L1_CACHE_SHIFT
151 config LOCKDEP_SUPPORT
155 config STACKTRACE_SUPPORT
159 # MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the
160 # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that
161 # are shared between architectures, and specifically expecting the symbols.
162 config MACH_LOONGSON32
165 config MACH_LOONGSON64
171 config PAGE_SIZE_16KB
174 config PAGE_SIZE_64KB
177 config PGTABLE_2LEVEL
180 config PGTABLE_3LEVEL
183 config PGTABLE_4LEVEL
186 config PGTABLE_LEVELS
188 default 2 if PGTABLE_2LEVEL
189 default 3 if PGTABLE_3LEVEL
190 default 4 if PGTABLE_4LEVEL
192 config SCHED_OMIT_FRAME_POINTER
196 menu "Kernel type and options"
198 source "kernel/Kconfig.hz"
201 prompt "Page Table Layout"
202 default 16KB_2LEVEL if 32BIT
203 default 16KB_3LEVEL if 64BIT
205 Allows choosing the page table layout, which is a combination
206 of page size and page table levels. The size of virtual memory
207 address space are determined by the page table layout.
210 bool "4KB with 3 levels"
212 select PGTABLE_3LEVEL
214 This option selects 4KB page size with 3 level page tables, which
215 support a maximum of 39 bits of application virtual memory.
218 bool "4KB with 4 levels"
220 select PGTABLE_4LEVEL
222 This option selects 4KB page size with 4 level page tables, which
223 support a maximum of 48 bits of application virtual memory.
226 bool "16KB with 2 levels"
227 select PAGE_SIZE_16KB
228 select PGTABLE_2LEVEL
230 This option selects 16KB page size with 2 level page tables, which
231 support a maximum of 36 bits of application virtual memory.
234 bool "16KB with 3 levels"
235 select PAGE_SIZE_16KB
236 select PGTABLE_3LEVEL
238 This option selects 16KB page size with 3 level page tables, which
239 support a maximum of 47 bits of application virtual memory.
242 bool "64KB with 2 levels"
243 select PAGE_SIZE_64KB
244 select PGTABLE_2LEVEL
246 This option selects 64KB page size with 2 level page tables, which
247 support a maximum of 42 bits of application virtual memory.
250 bool "64KB with 3 levels"
251 select PAGE_SIZE_64KB
252 select PGTABLE_3LEVEL
254 This option selects 64KB page size with 3 level page tables, which
255 support a maximum of 55 bits of application virtual memory.
260 string "Built-in kernel command line"
262 For most platforms, the arguments for the kernel's command line
263 are provided at run-time, during boot. However, there are cases
264 where either no arguments are being provided or the provided
265 arguments are insufficient or even invalid.
267 When that occurs, it is possible to define a built-in command
268 line here and choose how the kernel should use it later on.
271 prompt "Kernel command line type"
272 default CMDLINE_BOOTLOADER
274 Choose how the kernel will handle the provided built-in command
277 config CMDLINE_BOOTLOADER
278 bool "Use bootloader kernel arguments if available"
280 Prefer the command-line passed by the boot loader if available.
281 Use the built-in command line as fallback in case we get nothing
282 during boot. This is the default behaviour.
284 config CMDLINE_EXTEND
285 bool "Use built-in to extend bootloader kernel arguments"
287 The command-line arguments provided during boot will be
288 appended to the built-in command line. This is useful in
289 cases where the provided arguments are insufficient and
290 you don't want to or cannot modify them.
293 bool "Always use the built-in kernel command string"
295 Always use the built-in command line, even if we get one during
296 boot. This is useful in case you need to override the provided
297 command line on systems where you don't have or want control
303 bool "Enable DMI scanning"
304 select DMI_SCAN_MACHINE_NON_EFI_FALLBACK
307 This enables SMBIOS/DMI feature for systems, and scanning of
308 DMI to identify machine quirks.
311 bool "EFI runtime service support"
313 select EFI_PARAMS_FROM_FDT
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 "Multi-Processing support"
322 This enables support for systems with more than one CPU. If you have
323 a system with only one CPU, say N. If you have a system with more
326 If you say N here, the kernel will run on uni- and multiprocessor
327 machines, but will use only one CPU of a multiprocessor machine. If
328 you say Y here, the kernel will run on many, but not all,
329 uniprocessor machines. On a uniprocessor machine, the kernel
330 will run faster if you say N here.
332 See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>.
334 If you don't know what to do here, say N.
337 bool "Support for hot-pluggable CPUs"
339 select GENERIC_IRQ_MIGRATION
341 Say Y here to allow turning CPUs off and on. CPUs can be
342 controlled through /sys/devices/system/cpu.
343 (Note: power management support will enable this option
344 automatically on SMP systems. )
345 Say N if you want to disable CPU hotplug.
348 int "Maximum number of CPUs (2-256)"
353 This allows you to specify the maximum number of CPUs which this
359 select ACPI_NUMA if ACPI
361 Say Y to compile the kernel with NUMA (Non-Uniform Memory Access)
362 support. This option improves performance on systems with more
363 than one NUMA node; on single node systems it is generally better
364 to leave it disabled.
371 config FORCE_MAX_ZONEORDER
372 int "Maximum zone order"
373 range 14 64 if PAGE_SIZE_64KB
374 default "14" if PAGE_SIZE_64KB
375 range 12 64 if PAGE_SIZE_16KB
376 default "12" if PAGE_SIZE_16KB
380 The kernel memory allocator divides physically contiguous memory
381 blocks into "zones", where each zone is a power of two number of
382 pages. This option selects the largest power of two that the kernel
383 keeps in the memory allocator. If you need to allocate very large
384 blocks of physically contiguous memory, then you may need to
387 This config option is actually maximum order plus one. For example,
388 a value of 11 means that the largest free memory block is 2^10 pages.
390 The page size is not necessarily 4KB. Keep this in mind
391 when choosing a value for this option.
394 bool "Enable seccomp to safely compute untrusted bytecode"
398 This kernel feature is useful for number crunching applications
399 that may need to compute untrusted bytecode during their
400 execution. By using pipes or other transports made available to
401 the process as file descriptors supporting the read/write
402 syscalls, it's possible to isolate those applications in
403 their own address space using seccomp. Once seccomp is
404 enabled via /proc/<pid>/seccomp, it cannot be disabled
405 and the task is only allowed to execute a few safe syscalls
406 defined by each seccomp mode.
408 If unsure, say Y. Only embedded should say N here.
412 config ARCH_SELECT_MEMORY_MODEL
415 config ARCH_FLATMEM_ENABLE
419 config ARCH_SPARSEMEM_ENABLE
422 Say Y to support efficient handling of sparse physical memory,
423 for architectures which are either NUMA (Non-Uniform Memory Access)
424 or have huge holes in the physical address space for other reasons.
425 See <file:Documentation/vm/numa.rst> for more.
427 config ARCH_ENABLE_THP_MIGRATION
429 depends on TRANSPARENT_HUGEPAGE
431 config ARCH_MEMORY_PROBE
433 depends on MEMORY_HOTPLUG
439 config ARCH_MMAP_RND_BITS_MIN
442 config ARCH_MMAP_RND_BITS_MAX
445 menu "Power management options"
447 source "drivers/acpi/Kconfig"
451 source "drivers/firmware/Kconfig"