Commit | Line | Data |
---|---|---|
fa96b57c HC |
1 | # SPDX-License-Identifier: GPL-2.0 |
2 | config LOONGARCH | |
3 | bool | |
4 | default y | |
f30d1f49 | 5 | select ACPI |
cd057667 | 6 | select ACPI_GENERIC_GSI if ACPI |
57fc7323 | 7 | select ACPI_MCFG if ACPI |
a02f66bb | 8 | select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU |
f6f0c9a7 | 9 | select ACPI_PPTT if ACPI |
fa96b57c HC |
10 | select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI |
11 | select ARCH_BINFMT_ELF_STATE | |
5aa4ac64 | 12 | select ARCH_DISABLE_KASAN_INLINE |
fa96b57c HC |
13 | select ARCH_ENABLE_MEMORY_HOTPLUG |
14 | select ARCH_ENABLE_MEMORY_HOTREMOVE | |
b3ff2d9c | 15 | select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE |
fa96b57c | 16 | select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI |
9841c423 | 17 | select ARCH_HAS_CPU_FINALIZE_INIT |
8b5db5e5 | 18 | select ARCH_HAS_CURRENT_STACK_POINTER |
d4c937c2 | 19 | select ARCH_HAS_FORTIFY_SOURCE |
2363088e | 20 | select ARCH_HAS_KCOV |
3f48f3d9 | 21 | select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS |
de0e30be | 22 | select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE |
fa96b57c HC |
23 | select ARCH_HAS_PTE_SPECIAL |
24 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST | |
25 | select ARCH_INLINE_READ_LOCK if !PREEMPTION | |
26 | select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION | |
27 | select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION | |
28 | select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION | |
29 | select ARCH_INLINE_READ_UNLOCK if !PREEMPTION | |
30 | select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION | |
31 | select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION | |
32 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION | |
33 | select ARCH_INLINE_WRITE_LOCK if !PREEMPTION | |
34 | select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION | |
35 | select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION | |
36 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION | |
37 | select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION | |
38 | select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION | |
39 | select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION | |
40 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION | |
41 | select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION | |
42 | select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION | |
43 | select ARCH_INLINE_SPIN_LOCK if !PREEMPTION | |
44 | select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION | |
45 | select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION | |
46 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION | |
47 | select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION | |
48 | select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION | |
49 | select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION | |
50 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION | |
e0fba87c | 51 | select ARCH_KEEP_MEMBLOCK |
fa96b57c HC |
52 | select ARCH_MIGHT_HAVE_PC_PARPORT |
53 | select ARCH_MIGHT_HAVE_PC_SERIO | |
54 | select ARCH_SPARSEMEM_ENABLE | |
93a4fa62 | 55 | select ARCH_STACKWALK |
fa96b57c HC |
56 | select ARCH_SUPPORTS_ACPI |
57 | select ARCH_SUPPORTS_ATOMIC_RMW | |
58 | select ARCH_SUPPORTS_HUGETLBFS | |
5a31ed46 WX |
59 | select ARCH_SUPPORTS_LTO_CLANG |
60 | select ARCH_SUPPORTS_LTO_CLANG_THIN | |
d4b6f156 | 61 | select ARCH_SUPPORTS_NUMA_BALANCING |
fa96b57c HC |
62 | select ARCH_USE_BUILTIN_BSWAP |
63 | select ARCH_USE_CMPXCHG_LOCKREF | |
64 | select ARCH_USE_QUEUED_RWLOCKS | |
5f1e001b | 65 | select ARCH_USE_QUEUED_SPINLOCKS |
fa96b57c | 66 | select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT |
1429cfde | 67 | select ARCH_WANT_LD_ORPHAN_WARN |
0b6f1582 | 68 | select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP |
fa96b57c HC |
69 | select ARCH_WANTS_NO_INSTR |
70 | select BUILDTIME_TABLE_SORT | |
71 | select COMMON_CLK | |
366bb35a | 72 | select CPU_PM |
f30d1f49 | 73 | select EFI |
fa96b57c HC |
74 | select GENERIC_CLOCKEVENTS |
75 | select GENERIC_CMOS_UPDATE | |
76 | select GENERIC_CPU_AUTOPROBE | |
db3ba29a | 77 | select GENERIC_CPU_DEVICES |
fa96b57c | 78 | select GENERIC_ENTRY |
fa96b57c | 79 | select GENERIC_GETTIMEOFDAY |
d2791341 | 80 | select GENERIC_IOREMAP if !ARCH_IOREMAP |
fa96b57c HC |
81 | select GENERIC_IRQ_MULTI_HANDLER |
82 | select GENERIC_IRQ_PROBE | |
83 | select GENERIC_IRQ_SHOW | |
84 | select GENERIC_LIB_ASHLDI3 | |
85 | select GENERIC_LIB_ASHRDI3 | |
86 | select GENERIC_LIB_CMPDI2 | |
87 | select GENERIC_LIB_LSHRDI3 | |
88 | select GENERIC_LIB_UCMPDI2 | |
235d074f | 89 | select GENERIC_LIB_DEVMEM_IS_ALLOWED |
fa96b57c HC |
90 | select GENERIC_PCI_IOMAP |
91 | select GENERIC_SCHED_CLOCK | |
46859ac8 | 92 | select GENERIC_SMP_IDLE_THREAD |
fa96b57c | 93 | select GENERIC_TIME_VSYSCALL |
aa5e65dc | 94 | select GENERIC_VDSO_TIME_NS |
fa96b57c | 95 | select GPIOLIB |
fcbfe812 | 96 | select HAS_IOPORT |
fa96b57c | 97 | select HAVE_ARCH_AUDITSYSCALL |
f02644e3 YT |
98 | select HAVE_ARCH_JUMP_LABEL |
99 | select HAVE_ARCH_JUMP_LABEL_RELATIVE | |
5aa4ac64 | 100 | select HAVE_ARCH_KASAN |
6ad3df56 | 101 | select HAVE_ARCH_KFENCE |
e14dd076 | 102 | select HAVE_ARCH_KGDB if PERF_EVENTS |
fa96b57c | 103 | select HAVE_ARCH_MMAP_RND_BITS if MMU |
6b79ecd0 | 104 | select HAVE_ARCH_SECCOMP |
fa96b57c HC |
105 | select HAVE_ARCH_SECCOMP_FILTER |
106 | select HAVE_ARCH_TRACEHOOK | |
107 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE | |
f48ad26e | 108 | select HAVE_ARCH_USERFAULTFD_MINOR if USERFAULTFD |
fa96b57c | 109 | select HAVE_ASM_MODVERSIONS |
24a9c541 | 110 | select HAVE_CONTEXT_TRACKING_USER |
a0a458fb | 111 | select HAVE_C_RECORDMCOUNT |
5d553770 | 112 | select HAVE_DEBUG_KMEMLEAK |
fa96b57c HC |
113 | select HAVE_DEBUG_STACKOVERFLOW |
114 | select HAVE_DMA_CONTIGUOUS | |
4733f09d | 115 | select HAVE_DYNAMIC_FTRACE |
ac7127e1 | 116 | select HAVE_DYNAMIC_FTRACE_WITH_ARGS |
9cdc3b6a | 117 | select HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS |
8778ba2c | 118 | select HAVE_DYNAMIC_FTRACE_WITH_REGS |
5dc61552 | 119 | select HAVE_EBPF_JIT |
41596803 | 120 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !ARCH_STRICT_ALIGN |
fa96b57c | 121 | select HAVE_EXIT_THREAD |
25176ad0 | 122 | select HAVE_GUP_FAST |
a0a458fb | 123 | select HAVE_FTRACE_MCOUNT_RECORD |
356bd6f2 | 124 | select HAVE_FUNCTION_ARG_ACCESS_API |
8b5ee2c6 | 125 | select HAVE_FUNCTION_ERROR_INJECTION |
5779e3c0 | 126 | select HAVE_FUNCTION_GRAPH_RETVAL if HAVE_FUNCTION_GRAPH_TRACER |
dbe3ba30 QZ |
127 | select HAVE_FUNCTION_GRAPH_TRACER |
128 | select HAVE_FUNCTION_TRACER | |
2363088e | 129 | select HAVE_GCC_PLUGINS |
fa96b57c | 130 | select HAVE_GENERIC_VDSO |
edffa33c | 131 | select HAVE_HW_BREAKPOINT if PERF_EVENTS |
fa96b57c HC |
132 | select HAVE_IOREMAP_PROT |
133 | select HAVE_IRQ_EXIT_ON_IRQ_STACK | |
134 | select HAVE_IRQ_TIME_ACCOUNTING | |
6d4cc40f | 135 | select HAVE_KPROBES |
09e679c2 | 136 | select HAVE_KPROBES_ON_FTRACE |
3f553686 | 137 | select HAVE_KRETPROBES |
199cc14c | 138 | select HAVE_LIVEPATCH |
fa96b57c HC |
139 | select HAVE_MOD_ARCH_SPECIFIC |
140 | select HAVE_NMI | |
cb8a2ef0 | 141 | select HAVE_OBJTOOL if AS_HAS_EXPLICIT_RELOCS |
57fc7323 | 142 | select HAVE_PCI |
fa96b57c | 143 | select HAVE_PERF_EVENTS |
b37042b2 HC |
144 | select HAVE_PERF_REGS |
145 | select HAVE_PERF_USER_STACK_DUMP | |
80c7889d | 146 | select HAVE_PREEMPT_DYNAMIC_KEY |
fa96b57c | 147 | select HAVE_REGS_AND_STACK_ACCESS_API |
199cc14c | 148 | select HAVE_RELIABLE_STACKTRACE if UNWINDER_ORC |
7b0a0964 | 149 | select HAVE_RETHOOK |
fa96b57c | 150 | select HAVE_RSEQ |
90868ff9 | 151 | select HAVE_RUST |
22f367a6 YT |
152 | select HAVE_SAMPLE_FTRACE_DIRECT |
153 | select HAVE_SAMPLE_FTRACE_DIRECT_MULTI | |
d4b6f156 | 154 | select HAVE_SETUP_PER_CPU_AREA if NUMA |
cb8a2ef0 | 155 | select HAVE_STACK_VALIDATION if HAVE_OBJTOOL |
09f33601 | 156 | select HAVE_STACKPROTECTOR |
fa96b57c HC |
157 | select HAVE_SYSCALL_TRACEPOINTS |
158 | select HAVE_TIF_NOHZ | |
46859ac8 | 159 | select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP |
fa96b57c HC |
160 | select IRQ_FORCED_THREADING |
161 | select IRQ_LOONGARCH_CPU | |
a050ba1e | 162 | select LOCK_MM_AND_FIND_VMA |
f30d1f49 | 163 | select MMU_GATHER_MERGE_VMAS if MMU |
fa96b57c | 164 | select MODULES_USE_ELF_RELA if MODULES |
d4b6f156 HC |
165 | select NEED_PER_CPU_EMBED_FIRST_CHUNK |
166 | select NEED_PER_CPU_PAGE_FIRST_CHUNK | |
88d4d957 BZ |
167 | select OF |
168 | select OF_EARLY_FLATTREE | |
57fc7323 HC |
169 | select PCI |
170 | select PCI_DOMAINS_GENERIC | |
171 | select PCI_ECAM if ACPI | |
172 | select PCI_LOONGSON | |
173 | select PCI_MSI_ARCH_FALLBACKS | |
7c12bb8f | 174 | select PCI_QUIRKS |
fa96b57c HC |
175 | select PERF_USE_VMALLOC |
176 | select RTC_LIB | |
f30d1f49 | 177 | select SMP |
fa96b57c | 178 | select SPARSE_IRQ |
61a6fccc HC |
179 | select SYSCTL_ARCH_UNALIGN_ALLOW |
180 | select SYSCTL_ARCH_UNALIGN_NO_WARN | |
fa96b57c HC |
181 | select SYSCTL_EXCEPTION_TRACE |
182 | select SWIOTLB | |
183 | select TRACE_IRQFLAGS_SUPPORT | |
d4b6f156 | 184 | select USE_PERCPU_NUMA_NODE_ID |
4d7bf939 | 185 | select USER_STACKTRACE_SUPPORT |
fa96b57c HC |
186 | select ZONE_DMA32 |
187 | ||
188 | config 32BIT | |
189 | bool | |
190 | ||
191 | config 64BIT | |
192 | def_bool y | |
193 | ||
2d2c3952 YT |
194 | config GENERIC_BUG |
195 | def_bool y | |
196 | depends on BUG | |
197 | ||
198 | config GENERIC_BUG_RELATIVE_POINTERS | |
199 | def_bool y | |
200 | depends on GENERIC_BUG | |
201 | ||
fa96b57c HC |
202 | config GENERIC_CALIBRATE_DELAY |
203 | def_bool y | |
204 | ||
205 | config GENERIC_CSUM | |
206 | def_bool y | |
207 | ||
208 | config GENERIC_HWEIGHT | |
209 | def_bool y | |
210 | ||
211 | config L1_CACHE_SHIFT | |
212 | int | |
213 | default "6" | |
214 | ||
215 | config LOCKDEP_SUPPORT | |
216 | bool | |
93a4fa62 QZ |
217 | default y |
218 | ||
219 | config STACKTRACE_SUPPORT | |
220 | bool | |
fa96b57c HC |
221 | default y |
222 | ||
9550dfde | 223 | # MACH_LOONGSON32 and MACH_LOONGSON64 are deliberately carried over from the |
fa96b57c HC |
224 | # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that |
225 | # are shared between architectures, and specifically expecting the symbols. | |
226 | config MACH_LOONGSON32 | |
227 | def_bool 32BIT | |
228 | ||
229 | config MACH_LOONGSON64 | |
230 | def_bool 64BIT | |
231 | ||
d2791341 HC |
232 | config FIX_EARLYCON_MEM |
233 | def_bool y | |
234 | ||
fa96b57c HC |
235 | config PGTABLE_2LEVEL |
236 | bool | |
237 | ||
238 | config PGTABLE_3LEVEL | |
239 | bool | |
240 | ||
241 | config PGTABLE_4LEVEL | |
242 | bool | |
243 | ||
244 | config PGTABLE_LEVELS | |
245 | int | |
246 | default 2 if PGTABLE_2LEVEL | |
247 | default 3 if PGTABLE_3LEVEL | |
248 | default 4 if PGTABLE_4LEVEL | |
249 | ||
250 | config SCHED_OMIT_FRAME_POINTER | |
251 | bool | |
252 | default y | |
253 | ||
0d8dad70 XR |
254 | config AS_HAS_EXPLICIT_RELOCS |
255 | def_bool $(as-instr,x:pcalau12i \$t0$(comma)%pc_hi20(x)) | |
256 | ||
38bb46f9 WX |
257 | config AS_HAS_FCSR_CLASS |
258 | def_bool $(as-instr,movfcsr2gr \$t0$(comma)\$fcsr0) | |
259 | ||
61650023 HC |
260 | config AS_HAS_LSX_EXTENSION |
261 | def_bool $(as-instr,vld \$vr0$(comma)\$a0$(comma)0) | |
262 | ||
263 | config AS_HAS_LASX_EXTENSION | |
264 | def_bool $(as-instr,xvld \$xr0$(comma)\$a0$(comma)0) | |
265 | ||
bd3c5798 QH |
266 | config AS_HAS_LBT_EXTENSION |
267 | def_bool $(as-instr,movscr2gr \$a0$(comma)\$scr0) | |
268 | ||
c1fc48aa TZ |
269 | config AS_HAS_LVZ_EXTENSION |
270 | def_bool $(as-instr,hvcl 0) | |
271 | ||
fa96b57c HC |
272 | menu "Kernel type and options" |
273 | ||
274 | source "kernel/Kconfig.hz" | |
275 | ||
276 | choice | |
277 | prompt "Page Table Layout" | |
278 | default 16KB_2LEVEL if 32BIT | |
279 | default 16KB_3LEVEL if 64BIT | |
280 | help | |
281 | Allows choosing the page table layout, which is a combination | |
282 | of page size and page table levels. The size of virtual memory | |
283 | address space are determined by the page table layout. | |
284 | ||
285 | config 4KB_3LEVEL | |
286 | bool "4KB with 3 levels" | |
ba89f9c8 | 287 | select HAVE_PAGE_SIZE_4KB |
fa96b57c HC |
288 | select PGTABLE_3LEVEL |
289 | help | |
290 | This option selects 4KB page size with 3 level page tables, which | |
291 | support a maximum of 39 bits of application virtual memory. | |
292 | ||
293 | config 4KB_4LEVEL | |
294 | bool "4KB with 4 levels" | |
ba89f9c8 | 295 | select HAVE_PAGE_SIZE_4KB |
fa96b57c HC |
296 | select PGTABLE_4LEVEL |
297 | help | |
298 | This option selects 4KB page size with 4 level page tables, which | |
299 | support a maximum of 48 bits of application virtual memory. | |
300 | ||
301 | config 16KB_2LEVEL | |
302 | bool "16KB with 2 levels" | |
ba89f9c8 | 303 | select HAVE_PAGE_SIZE_16KB |
fa96b57c HC |
304 | select PGTABLE_2LEVEL |
305 | help | |
306 | This option selects 16KB page size with 2 level page tables, which | |
307 | support a maximum of 36 bits of application virtual memory. | |
308 | ||
309 | config 16KB_3LEVEL | |
310 | bool "16KB with 3 levels" | |
ba89f9c8 | 311 | select HAVE_PAGE_SIZE_16KB |
fa96b57c HC |
312 | select PGTABLE_3LEVEL |
313 | help | |
314 | This option selects 16KB page size with 3 level page tables, which | |
315 | support a maximum of 47 bits of application virtual memory. | |
316 | ||
317 | config 64KB_2LEVEL | |
318 | bool "64KB with 2 levels" | |
ba89f9c8 | 319 | select HAVE_PAGE_SIZE_64KB |
fa96b57c HC |
320 | select PGTABLE_2LEVEL |
321 | help | |
322 | This option selects 64KB page size with 2 level page tables, which | |
323 | support a maximum of 42 bits of application virtual memory. | |
324 | ||
325 | config 64KB_3LEVEL | |
326 | bool "64KB with 3 levels" | |
ba89f9c8 | 327 | select HAVE_PAGE_SIZE_64KB |
fa96b57c HC |
328 | select PGTABLE_3LEVEL |
329 | help | |
330 | This option selects 64KB page size with 3 level page tables, which | |
331 | support a maximum of 55 bits of application virtual memory. | |
332 | ||
333 | endchoice | |
334 | ||
335 | config CMDLINE | |
336 | string "Built-in kernel command line" | |
337 | help | |
338 | For most platforms, the arguments for the kernel's command line | |
339 | are provided at run-time, during boot. However, there are cases | |
340 | where either no arguments are being provided or the provided | |
341 | arguments are insufficient or even invalid. | |
342 | ||
343 | When that occurs, it is possible to define a built-in command | |
344 | line here and choose how the kernel should use it later on. | |
345 | ||
346 | choice | |
347 | prompt "Kernel command line type" | |
348 | default CMDLINE_BOOTLOADER | |
349 | help | |
350 | Choose how the kernel will handle the provided built-in command | |
351 | line. | |
352 | ||
353 | config CMDLINE_BOOTLOADER | |
354 | bool "Use bootloader kernel arguments if available" | |
355 | help | |
356 | Prefer the command-line passed by the boot loader if available. | |
357 | Use the built-in command line as fallback in case we get nothing | |
358 | during boot. This is the default behaviour. | |
359 | ||
360 | config CMDLINE_EXTEND | |
361 | bool "Use built-in to extend bootloader kernel arguments" | |
362 | help | |
363 | The command-line arguments provided during boot will be | |
364 | appended to the built-in command line. This is useful in | |
365 | cases where the provided arguments are insufficient and | |
366 | you don't want to or cannot modify them. | |
367 | ||
368 | config CMDLINE_FORCE | |
369 | bool "Always use the built-in kernel command string" | |
370 | help | |
371 | Always use the built-in command line, even if we get one during | |
372 | boot. This is useful in case you need to override the provided | |
373 | command line on systems where you don't have or want control | |
374 | over it. | |
375 | ||
376 | endchoice | |
377 | ||
5f346a6e BZ |
378 | config BUILTIN_DTB |
379 | bool "Enable built-in dtb in kernel" | |
380 | depends on OF | |
381 | help | |
382 | Some existing systems do not provide a canonical device tree to | |
383 | the kernel at boot time. Let's provide a device tree table in the | |
384 | kernel, keyed by the dts filename, containing the relevant DTBs. | |
385 | ||
386 | Built-in DTBs are generic enough and can be used as references. | |
387 | ||
388 | config BUILTIN_DTB_NAME | |
389 | string "Source file for built-in dtb" | |
390 | depends on BUILTIN_DTB | |
391 | help | |
392 | Base name (without suffix, relative to arch/loongarch/boot/dts/) | |
393 | for the DTS file that will be used to produce the DTB linked into | |
394 | the kernel. | |
395 | ||
fa96b57c HC |
396 | config DMI |
397 | bool "Enable DMI scanning" | |
398 | select DMI_SCAN_MACHINE_NON_EFI_FALLBACK | |
399 | default y | |
400 | help | |
401 | This enables SMBIOS/DMI feature for systems, and scanning of | |
402 | DMI to identify machine quirks. | |
403 | ||
404 | config EFI | |
405 | bool "EFI runtime service support" | |
406 | select UCS2_STRING | |
fa96b57c HC |
407 | select EFI_RUNTIME_WRAPPERS |
408 | help | |
409 | This enables the kernel to use EFI runtime services that are | |
410 | available (such as the EFI variable services). | |
411 | ||
ead384d9 HC |
412 | config EFI_STUB |
413 | bool "EFI boot stub support" | |
414 | default y | |
415 | depends on EFI | |
416 | select EFI_GENERIC_STUB | |
417 | help | |
418 | This kernel feature allows the kernel to be loaded directly by | |
419 | EFI firmware without the use of a bootloader. | |
420 | ||
f6f0c9a7 HC |
421 | config SCHED_SMT |
422 | bool "SMT scheduler support" | |
423 | default y | |
424 | help | |
425 | Improves scheduler's performance when there are multiple | |
426 | threads in one physical core. | |
427 | ||
46859ac8 HC |
428 | config SMP |
429 | bool "Multi-Processing support" | |
430 | help | |
431 | This enables support for systems with more than one CPU. If you have | |
432 | a system with only one CPU, say N. If you have a system with more | |
433 | than one CPU, say Y. | |
434 | ||
435 | If you say N here, the kernel will run on uni- and multiprocessor | |
436 | machines, but will use only one CPU of a multiprocessor machine. If | |
437 | you say Y here, the kernel will run on many, but not all, | |
438 | uniprocessor machines. On a uniprocessor machine, the kernel | |
439 | will run faster if you say N here. | |
440 | ||
441 | See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>. | |
442 | ||
443 | If you don't know what to do here, say N. | |
444 | ||
445 | config HOTPLUG_CPU | |
446 | bool "Support for hot-pluggable CPUs" | |
447 | depends on SMP | |
448 | select GENERIC_IRQ_MIGRATION | |
449 | help | |
450 | Say Y here to allow turning CPUs off and on. CPUs can be | |
451 | controlled through /sys/devices/system/cpu. | |
452 | (Note: power management support will enable this option | |
453 | automatically on SMP systems. ) | |
454 | Say N if you want to disable CPU hotplug. | |
455 | ||
456 | config NR_CPUS | |
457 | int "Maximum number of CPUs (2-256)" | |
458 | range 2 256 | |
459 | depends on SMP | |
460 | default "64" | |
461 | help | |
462 | This allows you to specify the maximum number of CPUs which this | |
463 | kernel will support. | |
464 | ||
d4b6f156 HC |
465 | config NUMA |
466 | bool "NUMA Support" | |
255b4658 | 467 | select SMP |
d4b6f156 HC |
468 | select ACPI_NUMA if ACPI |
469 | help | |
470 | Say Y to compile the kernel with NUMA (Non-Uniform Memory Access) | |
471 | support. This option improves performance on systems with more | |
472 | than one NUMA node; on single node systems it is generally better | |
473 | to leave it disabled. | |
474 | ||
475 | config NODES_SHIFT | |
476 | int | |
477 | default "6" | |
478 | depends on NUMA | |
479 | ||
0192445c | 480 | config ARCH_FORCE_MAX_ORDER |
fa96b57c | 481 | int "Maximum zone order" |
23baf831 | 482 | default "13" if PAGE_SIZE_64KB |
23baf831 | 483 | default "11" if PAGE_SIZE_16KB |
23baf831 | 484 | default "10" |
fa96b57c HC |
485 | help |
486 | The kernel memory allocator divides physically contiguous memory | |
487 | blocks into "zones", where each zone is a power of two number of | |
488 | pages. This option selects the largest power of two that the kernel | |
489 | keeps in the memory allocator. If you need to allocate very large | |
490 | blocks of physically contiguous memory, then you may need to | |
491 | increase this value. | |
492 | ||
fa96b57c HC |
493 | The page size is not necessarily 4KB. Keep this in mind |
494 | when choosing a value for this option. | |
495 | ||
d2791341 HC |
496 | config ARCH_IOREMAP |
497 | bool "Enable LoongArch DMW-based ioremap()" | |
498 | help | |
499 | We use generic TLB-based ioremap() by default since it has page | |
500 | protection support. However, you can enable LoongArch DMW-based | |
501 | ioremap() for better performance. | |
502 | ||
16c52e50 HC |
503 | config ARCH_WRITECOMBINE |
504 | bool "Enable WriteCombine (WUC) for ioremap()" | |
505 | help | |
506 | LoongArch maintains cache coherency in hardware, but when paired | |
507 | with LS7A chipsets the WUC attribute (Weak-ordered UnCached, which | |
508 | is similar to WriteCombine) is out of the scope of cache coherency | |
509 | machanism for PCIe devices (this is a PCIe protocol violation, which | |
510 | may be fixed in newer chipsets). | |
511 | ||
512 | This means WUC can only used for write-only memory regions now, so | |
513 | this option is disabled by default, making WUC silently fallback to | |
514 | SUC for ioremap(). You can enable this option if the kernel is ensured | |
515 | to run on hardware without this bug. | |
516 | ||
517 | You can override this setting via writecombine=on/off boot parameter. | |
518 | ||
41596803 HC |
519 | config ARCH_STRICT_ALIGN |
520 | bool "Enable -mstrict-align to prevent unaligned accesses" if EXPERT | |
521 | default y | |
522 | help | |
523 | Not all LoongArch cores support h/w unaligned access, we can use | |
524 | -mstrict-align build parameter to prevent unaligned accesses. | |
525 | ||
526 | CPUs with h/w unaligned access support: | |
527 | Loongson-2K2000/2K3000/3A5000/3C5000/3D5000. | |
528 | ||
529 | CPUs without h/w unaligned access support: | |
530 | Loongson-2K500/2K1000. | |
531 | ||
532 | This option is enabled by default to make the kernel be able to run | |
533 | on all LoongArch systems. But you can disable it manually if you want | |
534 | to run kernel only on systems with h/w unaligned access support in | |
535 | order to optimise for performance. | |
536 | ||
61650023 HC |
537 | config CPU_HAS_FPU |
538 | bool | |
539 | default y | |
540 | ||
541 | config CPU_HAS_LSX | |
542 | bool "Support for the Loongson SIMD Extension" | |
543 | depends on AS_HAS_LSX_EXTENSION | |
544 | help | |
545 | Loongson SIMD Extension (LSX) introduces 128 bit wide vector registers | |
546 | and a set of SIMD instructions to operate on them. When this option | |
547 | is enabled the kernel will support allocating & switching LSX | |
548 | vector register contexts. If you know that your kernel will only be | |
549 | running on CPUs which do not support LSX or that your userland will | |
550 | not be making use of it then you may wish to say N here to reduce | |
551 | the size & complexity of your kernel. | |
552 | ||
553 | If unsure, say Y. | |
554 | ||
555 | config CPU_HAS_LASX | |
556 | bool "Support for the Loongson Advanced SIMD Extension" | |
557 | depends on CPU_HAS_LSX | |
558 | depends on AS_HAS_LASX_EXTENSION | |
559 | help | |
560 | Loongson Advanced SIMD Extension (LASX) introduces 256 bit wide vector | |
561 | registers and a set of SIMD instructions to operate on them. When this | |
562 | option is enabled the kernel will support allocating & switching LASX | |
563 | vector register contexts. If you know that your kernel will only be | |
564 | running on CPUs which do not support LASX or that your userland will | |
565 | not be making use of it then you may wish to say N here to reduce | |
566 | the size & complexity of your kernel. | |
567 | ||
568 | If unsure, say Y. | |
569 | ||
bd3c5798 QH |
570 | config CPU_HAS_LBT |
571 | bool "Support for the Loongson Binary Translation Extension" | |
572 | depends on AS_HAS_LBT_EXTENSION | |
573 | help | |
574 | Loongson Binary Translation (LBT) introduces 4 scratch registers (SCR0 | |
575 | to SCR3), x86/ARM eflags (eflags) and x87 fpu stack pointer (ftop). | |
576 | Enabling this option allows the kernel to allocate and switch registers | |
577 | specific to LBT. | |
578 | ||
579 | If you want to use this feature, such as the Loongson Architecture | |
580 | Translator (LAT), say Y. | |
581 | ||
61650023 HC |
582 | config CPU_HAS_PREFETCH |
583 | bool | |
584 | default y | |
585 | ||
19e6dd0b ED |
586 | config ARCH_SUPPORTS_KEXEC |
587 | def_bool y | |
4a03b2ac | 588 | |
19e6dd0b ED |
589 | config ARCH_SUPPORTS_CRASH_DUMP |
590 | def_bool y | |
4a03b2ac | 591 | |
19e6dd0b ED |
592 | config ARCH_SELECTS_CRASH_DUMP |
593 | def_bool y | |
594 | depends on CRASH_DUMP | |
3f89765d | 595 | select RELOCATABLE |
4e62d1d8 | 596 | |
78de91b4 | 597 | config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION |
697f3342 | 598 | def_bool CRASH_RESERVE |
78de91b4 | 599 | |
d8da19fb YT |
600 | config RELOCATABLE |
601 | bool "Relocatable kernel" | |
602 | help | |
603 | This builds the kernel as a Position Independent Executable (PIE), | |
604 | which retains all relocation metadata required, so as to relocate | |
605 | the kernel binary at runtime to a different virtual address from | |
606 | its link address. | |
607 | ||
e5f02b51 YT |
608 | config RANDOMIZE_BASE |
609 | bool "Randomize the address of the kernel (KASLR)" | |
610 | depends on RELOCATABLE | |
611 | help | |
612 | Randomizes the physical and virtual address at which the | |
613 | kernel image is loaded, as a security feature that | |
614 | deters exploit attempts relying on knowledge of the location | |
615 | of kernel internals. | |
616 | ||
617 | The kernel will be offset by up to RANDOMIZE_BASE_MAX_OFFSET. | |
618 | ||
619 | If unsure, say N. | |
620 | ||
621 | config RANDOMIZE_BASE_MAX_OFFSET | |
622 | hex "Maximum KASLR offset" if EXPERT | |
623 | depends on RANDOMIZE_BASE | |
624 | range 0x0 0x10000000 | |
625 | default "0x01000000" | |
626 | help | |
627 | When KASLR is active, this provides the maximum offset that will | |
628 | be applied to the kernel image. It should be set according to the | |
629 | amount of physical RAM available in the target system. | |
630 | ||
631 | This is limited by the size of the lower address memory, 256MB. | |
632 | ||
199cc14c JH |
633 | source "kernel/livepatch/Kconfig" |
634 | ||
74c16b2e BM |
635 | config PARAVIRT |
636 | bool "Enable paravirtualization code" | |
637 | depends on AS_HAS_LVZ_EXTENSION | |
638 | help | |
639 | This changes the kernel so it can modify itself when it is run | |
640 | under a hypervisor, potentially improving performance significantly | |
641 | over full virtualization. However, when run without a hypervisor | |
642 | the kernel is theoretically slower and slightly larger. | |
643 | ||
fa96b57c HC |
644 | endmenu |
645 | ||
646 | config ARCH_SELECT_MEMORY_MODEL | |
647 | def_bool y | |
648 | ||
649 | config ARCH_FLATMEM_ENABLE | |
650 | def_bool y | |
d4b6f156 | 651 | depends on !NUMA |
fa96b57c HC |
652 | |
653 | config ARCH_SPARSEMEM_ENABLE | |
654 | def_bool y | |
7b09f5af | 655 | select SPARSEMEM_VMEMMAP_ENABLE |
fa96b57c HC |
656 | help |
657 | Say Y to support efficient handling of sparse physical memory, | |
658 | for architectures which are either NUMA (Non-Uniform Memory Access) | |
659 | or have huge holes in the physical address space for other reasons. | |
ee65728e | 660 | See <file:Documentation/mm/numa.rst> for more. |
fa96b57c | 661 | |
fa96b57c HC |
662 | config ARCH_MEMORY_PROBE |
663 | def_bool y | |
664 | depends on MEMORY_HOTPLUG | |
665 | ||
666 | config MMU | |
667 | bool | |
668 | default y | |
669 | ||
670 | config ARCH_MMAP_RND_BITS_MIN | |
671 | default 12 | |
672 | ||
673 | config ARCH_MMAP_RND_BITS_MAX | |
674 | default 18 | |
675 | ||
19bc6cb6 TY |
676 | config ARCH_SUPPORTS_UPROBES |
677 | def_bool y | |
678 | ||
5aa4ac64 QZ |
679 | config KASAN_SHADOW_OFFSET |
680 | hex | |
681 | default 0x0 | |
682 | depends on KASAN | |
683 | ||
fa96b57c HC |
684 | menu "Power management options" |
685 | ||
366bb35a HC |
686 | config ARCH_SUSPEND_POSSIBLE |
687 | def_bool y | |
688 | ||
7db54bfe HC |
689 | config ARCH_HIBERNATION_POSSIBLE |
690 | def_bool y | |
691 | ||
366bb35a | 692 | source "kernel/power/Kconfig" |
fa96b57c HC |
693 | source "drivers/acpi/Kconfig" |
694 | ||
695 | endmenu | |
c1fc48aa TZ |
696 | |
697 | source "arch/loongarch/kvm/Kconfig" |