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fa96b57c HC |
1 | # SPDX-License-Identifier: GPL-2.0 |
2 | config LOONGARCH | |
3 | bool | |
4 | default y | |
cd057667 | 5 | select ACPI_GENERIC_GSI if ACPI |
fa96b57c HC |
6 | select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI |
7 | select ARCH_BINFMT_ELF_STATE | |
8 | select ARCH_ENABLE_MEMORY_HOTPLUG | |
9 | select ARCH_ENABLE_MEMORY_HOTREMOVE | |
10 | select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI | |
d4b6f156 | 11 | select ARCH_HAS_PHYS_TO_DMA |
fa96b57c HC |
12 | select ARCH_HAS_PTE_SPECIAL |
13 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST | |
14 | select ARCH_INLINE_READ_LOCK if !PREEMPTION | |
15 | select ARCH_INLINE_READ_LOCK_BH if !PREEMPTION | |
16 | select ARCH_INLINE_READ_LOCK_IRQ if !PREEMPTION | |
17 | select ARCH_INLINE_READ_LOCK_IRQSAVE if !PREEMPTION | |
18 | select ARCH_INLINE_READ_UNLOCK if !PREEMPTION | |
19 | select ARCH_INLINE_READ_UNLOCK_BH if !PREEMPTION | |
20 | select ARCH_INLINE_READ_UNLOCK_IRQ if !PREEMPTION | |
21 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE if !PREEMPTION | |
22 | select ARCH_INLINE_WRITE_LOCK if !PREEMPTION | |
23 | select ARCH_INLINE_WRITE_LOCK_BH if !PREEMPTION | |
24 | select ARCH_INLINE_WRITE_LOCK_IRQ if !PREEMPTION | |
25 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE if !PREEMPTION | |
26 | select ARCH_INLINE_WRITE_UNLOCK if !PREEMPTION | |
27 | select ARCH_INLINE_WRITE_UNLOCK_BH if !PREEMPTION | |
28 | select ARCH_INLINE_WRITE_UNLOCK_IRQ if !PREEMPTION | |
29 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE if !PREEMPTION | |
30 | select ARCH_INLINE_SPIN_TRYLOCK if !PREEMPTION | |
31 | select ARCH_INLINE_SPIN_TRYLOCK_BH if !PREEMPTION | |
32 | select ARCH_INLINE_SPIN_LOCK if !PREEMPTION | |
33 | select ARCH_INLINE_SPIN_LOCK_BH if !PREEMPTION | |
34 | select ARCH_INLINE_SPIN_LOCK_IRQ if !PREEMPTION | |
35 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE if !PREEMPTION | |
36 | select ARCH_INLINE_SPIN_UNLOCK if !PREEMPTION | |
37 | select ARCH_INLINE_SPIN_UNLOCK_BH if !PREEMPTION | |
38 | select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION | |
39 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION | |
40 | select ARCH_MIGHT_HAVE_PC_PARPORT | |
41 | select ARCH_MIGHT_HAVE_PC_SERIO | |
42 | select ARCH_SPARSEMEM_ENABLE | |
43 | select ARCH_SUPPORTS_ACPI | |
44 | select ARCH_SUPPORTS_ATOMIC_RMW | |
45 | select ARCH_SUPPORTS_HUGETLBFS | |
d4b6f156 | 46 | select ARCH_SUPPORTS_NUMA_BALANCING |
fa96b57c HC |
47 | select ARCH_USE_BUILTIN_BSWAP |
48 | select ARCH_USE_CMPXCHG_LOCKREF | |
49 | select ARCH_USE_QUEUED_RWLOCKS | |
50 | select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT | |
51 | select ARCH_WANTS_NO_INSTR | |
52 | select BUILDTIME_TABLE_SORT | |
53 | select COMMON_CLK | |
54 | select GENERIC_CLOCKEVENTS | |
55 | select GENERIC_CMOS_UPDATE | |
56 | select GENERIC_CPU_AUTOPROBE | |
57 | select GENERIC_ENTRY | |
fa96b57c HC |
58 | select GENERIC_GETTIMEOFDAY |
59 | select GENERIC_IRQ_MULTI_HANDLER | |
60 | select GENERIC_IRQ_PROBE | |
61 | select GENERIC_IRQ_SHOW | |
62 | select GENERIC_LIB_ASHLDI3 | |
63 | select GENERIC_LIB_ASHRDI3 | |
64 | select GENERIC_LIB_CMPDI2 | |
65 | select GENERIC_LIB_LSHRDI3 | |
66 | select GENERIC_LIB_UCMPDI2 | |
67 | select GENERIC_PCI_IOMAP | |
68 | select GENERIC_SCHED_CLOCK | |
46859ac8 | 69 | select GENERIC_SMP_IDLE_THREAD |
fa96b57c HC |
70 | select GENERIC_TIME_VSYSCALL |
71 | select GPIOLIB | |
72 | select HAVE_ARCH_AUDITSYSCALL | |
fa96b57c HC |
73 | select HAVE_ARCH_MMAP_RND_BITS if MMU |
74 | select HAVE_ARCH_SECCOMP_FILTER | |
75 | select HAVE_ARCH_TRACEHOOK | |
76 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE | |
77 | select HAVE_ASM_MODVERSIONS | |
24a9c541 | 78 | select HAVE_CONTEXT_TRACKING_USER |
fa96b57c HC |
79 | select HAVE_DEBUG_STACKOVERFLOW |
80 | select HAVE_DMA_CONTIGUOUS | |
81 | select HAVE_EXIT_THREAD | |
82 | select HAVE_FAST_GUP | |
83 | select HAVE_GENERIC_VDSO | |
84 | select HAVE_IOREMAP_PROT | |
85 | select HAVE_IRQ_EXIT_ON_IRQ_STACK | |
86 | select HAVE_IRQ_TIME_ACCOUNTING | |
fa96b57c HC |
87 | select HAVE_MOD_ARCH_SPECIFIC |
88 | select HAVE_NMI | |
89 | select HAVE_PERF_EVENTS | |
90 | select HAVE_REGS_AND_STACK_ACCESS_API | |
91 | select HAVE_RSEQ | |
d4b6f156 | 92 | select HAVE_SETUP_PER_CPU_AREA if NUMA |
fa96b57c HC |
93 | select HAVE_SYSCALL_TRACEPOINTS |
94 | select HAVE_TIF_NOHZ | |
46859ac8 | 95 | select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP |
fa96b57c HC |
96 | select IRQ_FORCED_THREADING |
97 | select IRQ_LOONGARCH_CPU | |
98 | select MODULES_USE_ELF_RELA if MODULES | |
d4b6f156 HC |
99 | select NEED_PER_CPU_EMBED_FIRST_CHUNK |
100 | select NEED_PER_CPU_PAGE_FIRST_CHUNK | |
fa96b57c HC |
101 | select OF |
102 | select OF_EARLY_FLATTREE | |
103 | select PERF_USE_VMALLOC | |
104 | select RTC_LIB | |
105 | select SPARSE_IRQ | |
106 | select SYSCTL_EXCEPTION_TRACE | |
107 | select SWIOTLB | |
108 | select TRACE_IRQFLAGS_SUPPORT | |
d4b6f156 | 109 | select USE_PERCPU_NUMA_NODE_ID |
fa96b57c | 110 | select ZONE_DMA32 |
1e9fdf21 | 111 | select MMU_GATHER_MERGE_VMAS if MMU |
fa96b57c HC |
112 | |
113 | config 32BIT | |
114 | bool | |
115 | ||
116 | config 64BIT | |
117 | def_bool y | |
118 | ||
119 | config CPU_HAS_FPU | |
120 | bool | |
121 | default y | |
122 | ||
123 | config CPU_HAS_PREFETCH | |
124 | bool | |
125 | default y | |
126 | ||
127 | config GENERIC_CALIBRATE_DELAY | |
128 | def_bool y | |
129 | ||
130 | config GENERIC_CSUM | |
131 | def_bool y | |
132 | ||
133 | config GENERIC_HWEIGHT | |
134 | def_bool y | |
135 | ||
136 | config L1_CACHE_SHIFT | |
137 | int | |
138 | default "6" | |
139 | ||
140 | config LOCKDEP_SUPPORT | |
141 | bool | |
142 | default y | |
143 | ||
144 | # MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the | |
145 | # MIPS Loongson code, to preserve Loongson-specific code paths in drivers that | |
146 | # are shared between architectures, and specifically expecting the symbols. | |
147 | config MACH_LOONGSON32 | |
148 | def_bool 32BIT | |
149 | ||
150 | config MACH_LOONGSON64 | |
151 | def_bool 64BIT | |
152 | ||
153 | config PAGE_SIZE_4KB | |
154 | bool | |
155 | ||
156 | config PAGE_SIZE_16KB | |
157 | bool | |
158 | ||
159 | config PAGE_SIZE_64KB | |
160 | bool | |
161 | ||
162 | config PGTABLE_2LEVEL | |
163 | bool | |
164 | ||
165 | config PGTABLE_3LEVEL | |
166 | bool | |
167 | ||
168 | config PGTABLE_4LEVEL | |
169 | bool | |
170 | ||
171 | config PGTABLE_LEVELS | |
172 | int | |
173 | default 2 if PGTABLE_2LEVEL | |
174 | default 3 if PGTABLE_3LEVEL | |
175 | default 4 if PGTABLE_4LEVEL | |
176 | ||
177 | config SCHED_OMIT_FRAME_POINTER | |
178 | bool | |
179 | default y | |
180 | ||
181 | menu "Kernel type and options" | |
182 | ||
183 | source "kernel/Kconfig.hz" | |
184 | ||
185 | choice | |
186 | prompt "Page Table Layout" | |
187 | default 16KB_2LEVEL if 32BIT | |
188 | default 16KB_3LEVEL if 64BIT | |
189 | help | |
190 | Allows choosing the page table layout, which is a combination | |
191 | of page size and page table levels. The size of virtual memory | |
192 | address space are determined by the page table layout. | |
193 | ||
194 | config 4KB_3LEVEL | |
195 | bool "4KB with 3 levels" | |
196 | select PAGE_SIZE_4KB | |
197 | select PGTABLE_3LEVEL | |
198 | help | |
199 | This option selects 4KB page size with 3 level page tables, which | |
200 | support a maximum of 39 bits of application virtual memory. | |
201 | ||
202 | config 4KB_4LEVEL | |
203 | bool "4KB with 4 levels" | |
204 | select PAGE_SIZE_4KB | |
205 | select PGTABLE_4LEVEL | |
206 | help | |
207 | This option selects 4KB page size with 4 level page tables, which | |
208 | support a maximum of 48 bits of application virtual memory. | |
209 | ||
210 | config 16KB_2LEVEL | |
211 | bool "16KB with 2 levels" | |
212 | select PAGE_SIZE_16KB | |
213 | select PGTABLE_2LEVEL | |
214 | help | |
215 | This option selects 16KB page size with 2 level page tables, which | |
216 | support a maximum of 36 bits of application virtual memory. | |
217 | ||
218 | config 16KB_3LEVEL | |
219 | bool "16KB with 3 levels" | |
220 | select PAGE_SIZE_16KB | |
221 | select PGTABLE_3LEVEL | |
222 | help | |
223 | This option selects 16KB page size with 3 level page tables, which | |
224 | support a maximum of 47 bits of application virtual memory. | |
225 | ||
226 | config 64KB_2LEVEL | |
227 | bool "64KB with 2 levels" | |
228 | select PAGE_SIZE_64KB | |
229 | select PGTABLE_2LEVEL | |
230 | help | |
231 | This option selects 64KB page size with 2 level page tables, which | |
232 | support a maximum of 42 bits of application virtual memory. | |
233 | ||
234 | config 64KB_3LEVEL | |
235 | bool "64KB with 3 levels" | |
236 | select PAGE_SIZE_64KB | |
237 | select PGTABLE_3LEVEL | |
238 | help | |
239 | This option selects 64KB page size with 3 level page tables, which | |
240 | support a maximum of 55 bits of application virtual memory. | |
241 | ||
242 | endchoice | |
243 | ||
244 | config CMDLINE | |
245 | string "Built-in kernel command line" | |
246 | help | |
247 | For most platforms, the arguments for the kernel's command line | |
248 | are provided at run-time, during boot. However, there are cases | |
249 | where either no arguments are being provided or the provided | |
250 | arguments are insufficient or even invalid. | |
251 | ||
252 | When that occurs, it is possible to define a built-in command | |
253 | line here and choose how the kernel should use it later on. | |
254 | ||
255 | choice | |
256 | prompt "Kernel command line type" | |
257 | default CMDLINE_BOOTLOADER | |
258 | help | |
259 | Choose how the kernel will handle the provided built-in command | |
260 | line. | |
261 | ||
262 | config CMDLINE_BOOTLOADER | |
263 | bool "Use bootloader kernel arguments if available" | |
264 | help | |
265 | Prefer the command-line passed by the boot loader if available. | |
266 | Use the built-in command line as fallback in case we get nothing | |
267 | during boot. This is the default behaviour. | |
268 | ||
269 | config CMDLINE_EXTEND | |
270 | bool "Use built-in to extend bootloader kernel arguments" | |
271 | help | |
272 | The command-line arguments provided during boot will be | |
273 | appended to the built-in command line. This is useful in | |
274 | cases where the provided arguments are insufficient and | |
275 | you don't want to or cannot modify them. | |
276 | ||
277 | config CMDLINE_FORCE | |
278 | bool "Always use the built-in kernel command string" | |
279 | help | |
280 | Always use the built-in command line, even if we get one during | |
281 | boot. This is useful in case you need to override the provided | |
282 | command line on systems where you don't have or want control | |
283 | over it. | |
284 | ||
285 | endchoice | |
286 | ||
287 | config DMI | |
288 | bool "Enable DMI scanning" | |
289 | select DMI_SCAN_MACHINE_NON_EFI_FALLBACK | |
290 | default y | |
291 | help | |
292 | This enables SMBIOS/DMI feature for systems, and scanning of | |
293 | DMI to identify machine quirks. | |
294 | ||
295 | config EFI | |
296 | bool "EFI runtime service support" | |
297 | select UCS2_STRING | |
298 | select EFI_PARAMS_FROM_FDT | |
299 | select EFI_RUNTIME_WRAPPERS | |
300 | help | |
301 | This enables the kernel to use EFI runtime services that are | |
302 | available (such as the EFI variable services). | |
303 | ||
46859ac8 HC |
304 | config SMP |
305 | bool "Multi-Processing support" | |
306 | help | |
307 | This enables support for systems with more than one CPU. If you have | |
308 | a system with only one CPU, say N. If you have a system with more | |
309 | than one CPU, say Y. | |
310 | ||
311 | If you say N here, the kernel will run on uni- and multiprocessor | |
312 | machines, but will use only one CPU of a multiprocessor machine. If | |
313 | you say Y here, the kernel will run on many, but not all, | |
314 | uniprocessor machines. On a uniprocessor machine, the kernel | |
315 | will run faster if you say N here. | |
316 | ||
317 | See also the SMP-HOWTO available at <http://www.tldp.org/docs.html#howto>. | |
318 | ||
319 | If you don't know what to do here, say N. | |
320 | ||
321 | config HOTPLUG_CPU | |
322 | bool "Support for hot-pluggable CPUs" | |
323 | depends on SMP | |
324 | select GENERIC_IRQ_MIGRATION | |
325 | help | |
326 | Say Y here to allow turning CPUs off and on. CPUs can be | |
327 | controlled through /sys/devices/system/cpu. | |
328 | (Note: power management support will enable this option | |
329 | automatically on SMP systems. ) | |
330 | Say N if you want to disable CPU hotplug. | |
331 | ||
332 | config NR_CPUS | |
333 | int "Maximum number of CPUs (2-256)" | |
334 | range 2 256 | |
335 | depends on SMP | |
336 | default "64" | |
337 | help | |
338 | This allows you to specify the maximum number of CPUs which this | |
339 | kernel will support. | |
340 | ||
d4b6f156 HC |
341 | config NUMA |
342 | bool "NUMA Support" | |
255b4658 | 343 | select SMP |
d4b6f156 HC |
344 | select ACPI_NUMA if ACPI |
345 | help | |
346 | Say Y to compile the kernel with NUMA (Non-Uniform Memory Access) | |
347 | support. This option improves performance on systems with more | |
348 | than one NUMA node; on single node systems it is generally better | |
349 | to leave it disabled. | |
350 | ||
351 | config NODES_SHIFT | |
352 | int | |
353 | default "6" | |
354 | depends on NUMA | |
355 | ||
fa96b57c HC |
356 | config FORCE_MAX_ZONEORDER |
357 | int "Maximum zone order" | |
358 | range 14 64 if PAGE_SIZE_64KB | |
359 | default "14" if PAGE_SIZE_64KB | |
360 | range 12 64 if PAGE_SIZE_16KB | |
361 | default "12" if PAGE_SIZE_16KB | |
362 | range 11 64 | |
363 | default "11" | |
364 | help | |
365 | The kernel memory allocator divides physically contiguous memory | |
366 | blocks into "zones", where each zone is a power of two number of | |
367 | pages. This option selects the largest power of two that the kernel | |
368 | keeps in the memory allocator. If you need to allocate very large | |
369 | blocks of physically contiguous memory, then you may need to | |
370 | increase this value. | |
371 | ||
372 | This config option is actually maximum order plus one. For example, | |
373 | a value of 11 means that the largest free memory block is 2^10 pages. | |
374 | ||
375 | The page size is not necessarily 4KB. Keep this in mind | |
376 | when choosing a value for this option. | |
377 | ||
378 | config SECCOMP | |
379 | bool "Enable seccomp to safely compute untrusted bytecode" | |
380 | depends on PROC_FS | |
381 | default y | |
382 | help | |
383 | This kernel feature is useful for number crunching applications | |
384 | that may need to compute untrusted bytecode during their | |
385 | execution. By using pipes or other transports made available to | |
386 | the process as file descriptors supporting the read/write | |
387 | syscalls, it's possible to isolate those applications in | |
388 | their own address space using seccomp. Once seccomp is | |
389 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
390 | and the task is only allowed to execute a few safe syscalls | |
391 | defined by each seccomp mode. | |
392 | ||
393 | If unsure, say Y. Only embedded should say N here. | |
394 | ||
395 | endmenu | |
396 | ||
397 | config ARCH_SELECT_MEMORY_MODEL | |
398 | def_bool y | |
399 | ||
400 | config ARCH_FLATMEM_ENABLE | |
401 | def_bool y | |
d4b6f156 | 402 | depends on !NUMA |
fa96b57c HC |
403 | |
404 | config ARCH_SPARSEMEM_ENABLE | |
405 | def_bool y | |
406 | help | |
407 | Say Y to support efficient handling of sparse physical memory, | |
408 | for architectures which are either NUMA (Non-Uniform Memory Access) | |
409 | or have huge holes in the physical address space for other reasons. | |
410 | See <file:Documentation/vm/numa.rst> for more. | |
411 | ||
412 | config ARCH_ENABLE_THP_MIGRATION | |
413 | def_bool y | |
414 | depends on TRANSPARENT_HUGEPAGE | |
415 | ||
416 | config ARCH_MEMORY_PROBE | |
417 | def_bool y | |
418 | depends on MEMORY_HOTPLUG | |
419 | ||
420 | config MMU | |
421 | bool | |
422 | default y | |
423 | ||
424 | config ARCH_MMAP_RND_BITS_MIN | |
425 | default 12 | |
426 | ||
427 | config ARCH_MMAP_RND_BITS_MAX | |
428 | default 18 | |
429 | ||
430 | menu "Power management options" | |
431 | ||
432 | source "drivers/acpi/Kconfig" | |
433 | ||
434 | endmenu | |
435 | ||
436 | source "drivers/firmware/Kconfig" |