1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 config LOONGARCH !! 2 config M68K
3 bool 3 bool
4 default y 4 default y
5 select ACPI !! 5 select ARCH_32BIT_OFF_T
6 select ACPI_GENERIC_GSI if ACPI !! 6 select ARCH_HAS_BINFMT_FLAT
7 select ACPI_MCFG if ACPI !! 7 select ARCH_HAS_DMA_PREP_COHERENT if HAS_DMA && MMU && !COLDFIRE
8 select ACPI_HOTPLUG_CPU if ACPI_PROCES !! 8 select ARCH_HAS_SYNC_DMA_FOR_DEVICE if HAS_DMA
9 select ACPI_PPTT if ACPI !! 9 select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
10 select ACPI_SYSTEM_POWER_STATES_SUPPOR !! 10 select ARCH_MIGHT_HAVE_PC_PARPORT if ISA
11 select ARCH_BINFMT_ELF_STATE !! 11 select ARCH_NO_PREEMPT if !COLDFIRE
12 select ARCH_DISABLE_KASAN_INLINE !! 12 select ARCH_WANT_IPC_PARSE_VERSION
13 select ARCH_ENABLE_MEMORY_HOTPLUG !! 13 select BINFMT_FLAT_ARGVP_ENVP_ON_STACK
14 select ARCH_ENABLE_MEMORY_HOTREMOVE !! 14 select DMA_DIRECT_REMAP if HAS_DMA && MMU && !COLDFIRE
15 select ARCH_ENABLE_THP_MIGRATION if TR !! 15 select GENERIC_ATOMIC64
16 select ARCH_HAS_ACPI_TABLE_UPGRADE <<
17 select ARCH_HAS_CPU_FINALIZE_INIT <<
18 select ARCH_HAS_CURRENT_STACK_POINTER <<
19 select ARCH_HAS_DEBUG_VM_PGTABLE <<
20 select ARCH_HAS_FAST_MULTIPLIER <<
21 select ARCH_HAS_FORTIFY_SOURCE <<
22 select ARCH_HAS_KCOV <<
23 select ARCH_HAS_KERNEL_FPU_SUPPORT if <<
24 select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS <<
25 select ARCH_HAS_NON_OVERLAPPING_ADDRES <<
26 select ARCH_HAS_PTE_DEVMAP <<
27 select ARCH_HAS_PTE_SPECIAL <<
28 select ARCH_HAS_SET_MEMORY <<
29 select ARCH_HAS_SET_DIRECT_MAP <<
30 select ARCH_HAS_TICK_BROADCAST if GENE <<
31 select ARCH_INLINE_READ_LOCK if !PREEM <<
32 select ARCH_INLINE_READ_LOCK_BH if !PR <<
33 select ARCH_INLINE_READ_LOCK_IRQ if !P <<
34 select ARCH_INLINE_READ_LOCK_IRQSAVE i <<
35 select ARCH_INLINE_READ_UNLOCK if !PRE <<
36 select ARCH_INLINE_READ_UNLOCK_BH if ! <<
37 select ARCH_INLINE_READ_UNLOCK_IRQ if <<
38 select ARCH_INLINE_READ_UNLOCK_IRQREST <<
39 select ARCH_INLINE_WRITE_LOCK if !PREE <<
40 select ARCH_INLINE_WRITE_LOCK_BH if !P <<
41 select ARCH_INLINE_WRITE_LOCK_IRQ if ! <<
42 select ARCH_INLINE_WRITE_LOCK_IRQSAVE <<
43 select ARCH_INLINE_WRITE_UNLOCK if !PR <<
44 select ARCH_INLINE_WRITE_UNLOCK_BH if <<
45 select ARCH_INLINE_WRITE_UNLOCK_IRQ if <<
46 select ARCH_INLINE_WRITE_UNLOCK_IRQRES <<
47 select ARCH_INLINE_SPIN_TRYLOCK if !PR <<
48 select ARCH_INLINE_SPIN_TRYLOCK_BH if <<
49 select ARCH_INLINE_SPIN_LOCK if !PREEM <<
50 select ARCH_INLINE_SPIN_LOCK_BH if !PR <<
51 select ARCH_INLINE_SPIN_LOCK_IRQ if !P <<
52 select ARCH_INLINE_SPIN_LOCK_IRQSAVE i <<
53 select ARCH_INLINE_SPIN_UNLOCK if !PRE <<
54 select ARCH_INLINE_SPIN_UNLOCK_BH if ! <<
55 select ARCH_INLINE_SPIN_UNLOCK_IRQ if <<
56 select ARCH_INLINE_SPIN_UNLOCK_IRQREST <<
57 select ARCH_KEEP_MEMBLOCK <<
58 select ARCH_MIGHT_HAVE_PC_PARPORT <<
59 select ARCH_MIGHT_HAVE_PC_SERIO <<
60 select ARCH_SPARSEMEM_ENABLE <<
61 select ARCH_STACKWALK <<
62 select ARCH_SUPPORTS_ACPI <<
63 select ARCH_SUPPORTS_ATOMIC_RMW <<
64 select ARCH_SUPPORTS_HUGETLBFS <<
65 select ARCH_SUPPORTS_INT128 if CC_HAS_ <<
66 select ARCH_SUPPORTS_LTO_CLANG <<
67 select ARCH_SUPPORTS_LTO_CLANG_THIN <<
68 select ARCH_SUPPORTS_NUMA_BALANCING <<
69 select ARCH_USE_BUILTIN_BSWAP <<
70 select ARCH_USE_CMPXCHG_LOCKREF <<
71 select ARCH_USE_QUEUED_RWLOCKS <<
72 select ARCH_USE_QUEUED_SPINLOCKS <<
73 select ARCH_WANT_DEFAULT_BPF_JIT <<
74 select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_ <<
75 select ARCH_WANT_LD_ORPHAN_WARN <<
76 select ARCH_WANT_OPTIMIZE_HUGETLB_VMEM <<
77 select ARCH_WANTS_NO_INSTR <<
78 select ARCH_WANTS_THP_SWAP if HAVE_ARC <<
79 select BUILDTIME_TABLE_SORT <<
80 select COMMON_CLK <<
81 select CPU_PM <<
82 select EFI <<
83 select GENERIC_CLOCKEVENTS <<
84 select GENERIC_CMOS_UPDATE <<
85 select GENERIC_CPU_AUTOPROBE <<
86 select GENERIC_CPU_DEVICES 16 select GENERIC_CPU_DEVICES
87 select GENERIC_CPU_VULNERABILITIES !! 17 select GENERIC_IOMAP
88 select GENERIC_ENTRY <<
89 select GENERIC_GETTIMEOFDAY <<
90 select GENERIC_IOREMAP if !ARCH_IOREMA <<
91 select GENERIC_IRQ_MATRIX_ALLOCATOR <<
92 select GENERIC_IRQ_MULTI_HANDLER <<
93 select GENERIC_IRQ_PROBE <<
94 select GENERIC_IRQ_SHOW 18 select GENERIC_IRQ_SHOW
95 select GENERIC_LIB_ASHLDI3 !! 19 select GENERIC_STRNCPY_FROM_USER if MMU
96 select GENERIC_LIB_ASHRDI3 !! 20 select GENERIC_STRNLEN_USER if MMU
97 select GENERIC_LIB_CMPDI2 !! 21 select HAVE_AOUT if MMU
98 select GENERIC_LIB_LSHRDI3 <<
99 select GENERIC_LIB_UCMPDI2 <<
100 select GENERIC_LIB_DEVMEM_IS_ALLOWED <<
101 select GENERIC_PCI_IOMAP <<
102 select GENERIC_SCHED_CLOCK <<
103 select GENERIC_SMP_IDLE_THREAD <<
104 select GENERIC_TIME_VSYSCALL <<
105 select GENERIC_VDSO_TIME_NS <<
106 select GPIOLIB <<
107 select HAS_IOPORT <<
108 select HAVE_ARCH_AUDITSYSCALL <<
109 select HAVE_ARCH_JUMP_LABEL <<
110 select HAVE_ARCH_JUMP_LABEL_RELATIVE <<
111 select HAVE_ARCH_KASAN <<
112 select HAVE_ARCH_KFENCE <<
113 select HAVE_ARCH_KGDB if PERF_EVENTS <<
114 select HAVE_ARCH_MMAP_RND_BITS if MMU <<
115 select HAVE_ARCH_RANDOMIZE_KSTACK_OFFS <<
116 select HAVE_ARCH_SECCOMP <<
117 select HAVE_ARCH_SECCOMP_FILTER <<
118 select HAVE_ARCH_TRACEHOOK <<
119 select HAVE_ARCH_TRANSPARENT_HUGEPAGE <<
120 select HAVE_ARCH_USERFAULTFD_MINOR if <<
121 select HAVE_ASM_MODVERSIONS 22 select HAVE_ASM_MODVERSIONS
122 select HAVE_CONTEXT_TRACKING_USER !! 23 select HAVE_DEBUG_BUGVERBOSE
123 select HAVE_C_RECORDMCOUNT !! 24 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_HAS_NO_UNALIGNED
124 select HAVE_DEBUG_KMEMLEAK !! 25 select HAVE_FUTEX_CMPXCHG if MMU && FUTEX
125 select HAVE_DEBUG_STACKOVERFLOW <<
126 select HAVE_DMA_CONTIGUOUS <<
127 select HAVE_DYNAMIC_FTRACE <<
128 select HAVE_DYNAMIC_FTRACE_WITH_ARGS <<
129 select HAVE_DYNAMIC_FTRACE_WITH_DIRECT <<
130 select HAVE_DYNAMIC_FTRACE_WITH_REGS <<
131 select HAVE_EBPF_JIT <<
132 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
133 select HAVE_EXIT_THREAD <<
134 select HAVE_GUP_FAST <<
135 select HAVE_FTRACE_MCOUNT_RECORD <<
136 select HAVE_FUNCTION_ARG_ACCESS_API <<
137 select HAVE_FUNCTION_ERROR_INJECTION <<
138 select HAVE_FUNCTION_GRAPH_RETVAL if H <<
139 select HAVE_FUNCTION_GRAPH_TRACER <<
140 select HAVE_FUNCTION_TRACER <<
141 select HAVE_GCC_PLUGINS <<
142 select HAVE_GENERIC_VDSO <<
143 select HAVE_HW_BREAKPOINT if PERF_EVEN <<
144 select HAVE_IOREMAP_PROT <<
145 select HAVE_IRQ_EXIT_ON_IRQ_STACK <<
146 select HAVE_IRQ_TIME_ACCOUNTING <<
147 select HAVE_KPROBES <<
148 select HAVE_KPROBES_ON_FTRACE <<
149 select HAVE_KRETPROBES <<
150 select HAVE_LIVEPATCH <<
151 select HAVE_MOD_ARCH_SPECIFIC 26 select HAVE_MOD_ARCH_SPECIFIC
152 select HAVE_NMI !! 27 select HAVE_UID16
153 select HAVE_OBJTOOL if AS_HAS_EXPLICIT !! 28 select MMU_GATHER_NO_RANGE if MMU
154 select HAVE_PCI !! 29 select MODULES_USE_ELF_REL
155 select HAVE_PERF_EVENTS !! 30 select MODULES_USE_ELF_RELA
156 select HAVE_PERF_REGS !! 31 select NO_DMA if !MMU && !COLDFIRE
157 select HAVE_PERF_USER_STACK_DUMP !! 32 select OLD_SIGACTION
158 select HAVE_PREEMPT_DYNAMIC_KEY !! 33 select OLD_SIGSUSPEND3
159 select HAVE_REGS_AND_STACK_ACCESS_API !! 34 select SET_FS
160 select HAVE_RELIABLE_STACKTRACE if UNW !! 35 select UACCESS_MEMCPY if !MMU
161 select HAVE_RETHOOK !! 36 select VIRT_TO_BUS
162 select HAVE_RSEQ !! 37 select ZONE_DMA
163 select HAVE_RUST <<
164 select HAVE_SAMPLE_FTRACE_DIRECT <<
165 select HAVE_SAMPLE_FTRACE_DIRECT_MULTI <<
166 select HAVE_SETUP_PER_CPU_AREA if NUMA <<
167 select HAVE_STACK_VALIDATION if HAVE_O <<
168 select HAVE_STACKPROTECTOR <<
169 select HAVE_SYSCALL_TRACEPOINTS <<
170 select HAVE_TIF_NOHZ <<
171 select HAVE_VIRT_CPU_ACCOUNTING_GEN if <<
172 select IRQ_FORCED_THREADING <<
173 select IRQ_LOONGARCH_CPU <<
174 select LOCK_MM_AND_FIND_VMA <<
175 select MMU_GATHER_MERGE_VMAS if MMU <<
176 select MODULES_USE_ELF_RELA if MODULES <<
177 select NEED_PER_CPU_EMBED_FIRST_CHUNK <<
178 select NEED_PER_CPU_PAGE_FIRST_CHUNK <<
179 select OF <<
180 select OF_EARLY_FLATTREE <<
181 select PCI <<
182 select PCI_DOMAINS_GENERIC <<
183 select PCI_ECAM if ACPI <<
184 select PCI_LOONGSON <<
185 select PCI_MSI_ARCH_FALLBACKS <<
186 select PCI_QUIRKS <<
187 select PERF_USE_VMALLOC <<
188 select RTC_LIB <<
189 select SPARSE_IRQ <<
190 select SYSCTL_ARCH_UNALIGN_ALLOW <<
191 select SYSCTL_ARCH_UNALIGN_NO_WARN <<
192 select SYSCTL_EXCEPTION_TRACE <<
193 select SWIOTLB <<
194 select TRACE_IRQFLAGS_SUPPORT <<
195 select USE_PERCPU_NUMA_NODE_ID <<
196 select USER_STACKTRACE_SUPPORT <<
197 select VDSO_GETRANDOM <<
198 select ZONE_DMA32 <<
199 38
200 config 32BIT !! 39 config CPU_BIG_ENDIAN
201 bool <<
202 <<
203 config 64BIT <<
204 def_bool y 40 def_bool y
205 41
206 config GENERIC_BUG !! 42 config ARCH_HAS_ILOG2_U32
207 def_bool y !! 43 bool
208 depends on BUG <<
209 <<
210 config GENERIC_BUG_RELATIVE_POINTERS <<
211 def_bool y <<
212 depends on GENERIC_BUG <<
213 <<
214 config GENERIC_CALIBRATE_DELAY <<
215 def_bool y <<
216 44
217 config GENERIC_CSUM !! 45 config ARCH_HAS_ILOG2_U64
218 def_bool y !! 46 bool
219 47
220 config GENERIC_HWEIGHT 48 config GENERIC_HWEIGHT
221 def_bool y <<
222 <<
223 config L1_CACHE_SHIFT <<
224 int <<
225 default "6" <<
226 <<
227 config LOCKDEP_SUPPORT <<
228 bool 49 bool
229 default y 50 default y
230 51
231 config STACKTRACE_SUPPORT !! 52 config GENERIC_CALIBRATE_DELAY
232 bool 53 bool
233 default y 54 default y
234 55
235 # MACH_LOONGSON32 and MACH_LOONGSON64 are deli !! 56 config GENERIC_CSUM
236 # MIPS Loongson code, to preserve Loongson-spe <<
237 # are shared between architectures, and specif <<
238 config MACH_LOONGSON32 <<
239 def_bool 32BIT <<
240 <<
241 config MACH_LOONGSON64 <<
242 def_bool 64BIT <<
243 <<
244 config FIX_EARLYCON_MEM <<
245 def_bool y <<
246 <<
247 config PGTABLE_2LEVEL <<
248 bool <<
249 <<
250 config PGTABLE_3LEVEL <<
251 bool <<
252 <<
253 config PGTABLE_4LEVEL <<
254 bool 57 bool
255 58
256 config PGTABLE_LEVELS !! 59 config TIME_LOW_RES
257 int <<
258 default 2 if PGTABLE_2LEVEL <<
259 default 3 if PGTABLE_3LEVEL <<
260 default 4 if PGTABLE_4LEVEL <<
261 <<
262 config SCHED_OMIT_FRAME_POINTER <<
263 bool 60 bool
264 default y 61 default y
265 62
266 config AS_HAS_EXPLICIT_RELOCS !! 63 config NO_IOPORT_MAP
267 def_bool $(as-instr,x:pcalau12i \$t0$( !! 64 def_bool y
268 <<
269 config AS_HAS_FCSR_CLASS <<
270 def_bool $(as-instr,movfcsr2gr \$t0$(c <<
271 <<
272 config AS_HAS_THIN_ADD_SUB <<
273 def_bool $(cc-option,-Wa$(comma)-mthin <<
274 <<
275 config AS_HAS_LSX_EXTENSION <<
276 def_bool $(as-instr,vld \$vr0$(comma)\ <<
277 <<
278 config AS_HAS_LASX_EXTENSION <<
279 def_bool $(as-instr,xvld \$xr0$(comma) <<
280 <<
281 config AS_HAS_LBT_EXTENSION <<
282 def_bool $(as-instr,movscr2gr \$a0$(co <<
283 <<
284 config AS_HAS_LVZ_EXTENSION <<
285 def_bool $(as-instr,hvcl 0) <<
286 <<
287 menu "Kernel type and options" <<
288 <<
289 source "kernel/Kconfig.hz" <<
290 <<
291 choice <<
292 prompt "Page Table Layout" <<
293 default 16KB_2LEVEL if 32BIT <<
294 default 16KB_3LEVEL if 64BIT <<
295 help <<
296 Allows choosing the page table layou <<
297 of page size and page table levels. <<
298 address space are determined by the <<
299 <<
300 config 4KB_3LEVEL <<
301 bool "4KB with 3 levels" <<
302 select HAVE_PAGE_SIZE_4KB <<
303 select PGTABLE_3LEVEL <<
304 help <<
305 This option selects 4KB page size wi <<
306 support a maximum of 39 bits of appl <<
307 <<
308 config 4KB_4LEVEL <<
309 bool "4KB with 4 levels" <<
310 select HAVE_PAGE_SIZE_4KB <<
311 select PGTABLE_4LEVEL <<
312 help <<
313 This option selects 4KB page size wi <<
314 support a maximum of 48 bits of appl <<
315 <<
316 config 16KB_2LEVEL <<
317 bool "16KB with 2 levels" <<
318 select HAVE_PAGE_SIZE_16KB <<
319 select PGTABLE_2LEVEL <<
320 help <<
321 This option selects 16KB page size w <<
322 support a maximum of 36 bits of appl <<
323 <<
324 config 16KB_3LEVEL <<
325 bool "16KB with 3 levels" <<
326 select HAVE_PAGE_SIZE_16KB <<
327 select PGTABLE_3LEVEL <<
328 help <<
329 This option selects 16KB page size w <<
330 support a maximum of 47 bits of appl <<
331 <<
332 config 64KB_2LEVEL <<
333 bool "64KB with 2 levels" <<
334 select HAVE_PAGE_SIZE_64KB <<
335 select PGTABLE_2LEVEL <<
336 help <<
337 This option selects 64KB page size w <<
338 support a maximum of 42 bits of appl <<
339 <<
340 config 64KB_3LEVEL <<
341 bool "64KB with 3 levels" <<
342 select HAVE_PAGE_SIZE_64KB <<
343 select PGTABLE_3LEVEL <<
344 help <<
345 This option selects 64KB page size w <<
346 support a maximum of 55 bits of appl <<
347 <<
348 endchoice <<
349 <<
350 config CMDLINE <<
351 string "Built-in kernel command line" <<
352 help <<
353 For most platforms, the arguments fo <<
354 are provided at run-time, during boo <<
355 where either no arguments are being <<
356 arguments are insufficient or even i <<
357 <<
358 When that occurs, it is possible to <<
359 line here and choose how the kernel <<
360 <<
361 choice <<
362 prompt "Kernel command line type" <<
363 default CMDLINE_BOOTLOADER <<
364 help <<
365 Choose how the kernel will handle th <<
366 line. <<
367 <<
368 config CMDLINE_BOOTLOADER <<
369 bool "Use bootloader kernel arguments <<
370 help <<
371 Prefer the command-line passed by th <<
372 Use the built-in command line as fal <<
373 during boot. This is the default beh <<
374 <<
375 config CMDLINE_EXTEND <<
376 bool "Use built-in to extend bootloade <<
377 help <<
378 The command-line arguments provided <<
379 appended to the built-in command lin <<
380 cases where the provided arguments a <<
381 you don't want to or cannot modify t <<
382 <<
383 config CMDLINE_FORCE <<
384 bool "Always use the built-in kernel c <<
385 help <<
386 Always use the built-in command line <<
387 boot. This is useful in case you nee <<
388 command line on systems where you do <<
389 over it. <<
390 <<
391 endchoice <<
392 <<
393 config BUILTIN_DTB <<
394 bool "Enable built-in dtb in kernel" <<
395 depends on OF <<
396 help <<
397 Some existing systems do not provide <<
398 the kernel at boot time. Let's provi <<
399 kernel, keyed by the dts filename, c <<
400 <<
401 Built-in DTBs are generic enough and <<
402 <<
403 config BUILTIN_DTB_NAME <<
404 string "Source file for built-in dtb" <<
405 depends on BUILTIN_DTB <<
406 help <<
407 Base name (without suffix, relative <<
408 for the DTS file that will be used t <<
409 the kernel. <<
410 <<
411 config DMI <<
412 bool "Enable DMI scanning" <<
413 select DMI_SCAN_MACHINE_NON_EFI_FALLBA <<
414 default y <<
415 help <<
416 This enables SMBIOS/DMI feature for <<
417 DMI to identify machine quirks. <<
418 <<
419 config EFI <<
420 bool "EFI runtime service support" <<
421 select UCS2_STRING <<
422 select EFI_RUNTIME_WRAPPERS <<
423 help <<
424 This enables the kernel to use EFI r <<
425 available (such as the EFI variable <<
426 <<
427 config EFI_STUB <<
428 bool "EFI boot stub support" <<
429 default y <<
430 depends on EFI <<
431 select EFI_GENERIC_STUB <<
432 help <<
433 This kernel feature allows the kerne <<
434 EFI firmware without the use of a bo <<
435 <<
436 config SCHED_SMT <<
437 bool "SMT scheduler support" <<
438 depends on SMP <<
439 default y <<
440 help <<
441 Improves scheduler's performance whe <<
442 threads in one physical core. <<
443 <<
444 config SMP <<
445 bool "Multi-Processing support" <<
446 help <<
447 This enables support for systems wit <<
448 a system with only one CPU, say N. I <<
449 than one CPU, say Y. <<
450 <<
451 If you say N here, the kernel will r <<
452 machines, but will use only one CPU <<
453 you say Y here, the kernel will run <<
454 uniprocessor machines. On a uniproce <<
455 will run faster if you say N here. <<
456 <<
457 See also the SMP-HOWTO available at <<
458 <<
459 If you don't know what to do here, s <<
460 <<
461 config HOTPLUG_CPU <<
462 bool "Support for hot-pluggable CPUs" <<
463 depends on SMP <<
464 select GENERIC_IRQ_MIGRATION <<
465 help <<
466 Say Y here to allow turning CPUs off <<
467 controlled through /sys/devices/syst <<
468 (Note: power management support will <<
469 automatically on SMP systems. ) <<
470 Say N if you want to disable CPU hot <<
471 <<
472 config NR_CPUS <<
473 int "Maximum number of CPUs (2-256)" <<
474 range 2 256 <<
475 depends on SMP <<
476 default "64" <<
477 help <<
478 This allows you to specify the maxim <<
479 kernel will support. <<
480 <<
481 config NUMA <<
482 bool "NUMA Support" <<
483 select SMP <<
484 help <<
485 Say Y to compile the kernel with NUM <<
486 support. This option improves perfo <<
487 than one NUMA node; on single node s <<
488 to leave it disabled. <<
489 65
490 config NODES_SHIFT !! 66 config HZ
491 int 67 int
492 default "6" !! 68 default 1000 if CLEOPATRA
493 depends on NUMA !! 69 default 100
494 <<
495 config ARCH_FORCE_MAX_ORDER <<
496 int "Maximum zone order" <<
497 default "13" if PAGE_SIZE_64KB <<
498 default "11" if PAGE_SIZE_16KB <<
499 default "10" <<
500 help <<
501 The kernel memory allocator divides <<
502 blocks into "zones", where each zone <<
503 pages. This option selects the larg <<
504 keeps in the memory allocator. If y <<
505 blocks of physically contiguous memo <<
506 increase this value. <<
507 70
508 The page size is not necessarily 4KB !! 71 config PGTABLE_LEVELS
509 when choosing a value for this optio !! 72 default 2 if SUN3 || COLDFIRE
510 !! 73 default 3
511 config ARCH_IOREMAP <<
512 bool "Enable LoongArch DMW-based iorem <<
513 help <<
514 We use generic TLB-based ioremap() b <<
515 protection support. However, you can <<
516 ioremap() for better performance. <<
517 <<
518 config ARCH_WRITECOMBINE <<
519 bool "Enable WriteCombine (WUC) for io <<
520 help <<
521 LoongArch maintains cache coherency <<
522 with LS7A chipsets the WUC attribute <<
523 is similar to WriteCombine) is out o <<
524 machanism for PCIe devices (this is <<
525 may be fixed in newer chipsets). <<
526 <<
527 This means WUC can only used for wri <<
528 this option is disabled by default, <<
529 SUC for ioremap(). You can enable th <<
530 to run on hardware without this bug. <<
531 <<
532 You can override this setting via wr <<
533 74
534 config ARCH_STRICT_ALIGN !! 75 config MMU
535 bool "Enable -mstrict-align to prevent !! 76 bool "MMU-based Paged Memory Management Support"
536 default y 77 default y
537 help 78 help
538 Not all LoongArch cores support h/w !! 79 Select if you want MMU-based virtualised addressing space
539 -mstrict-align build parameter to pr !! 80 support by paged memory management. If unsure, say 'Y'.
540 <<
541 CPUs with h/w unaligned access suppo <<
542 Loongson-2K2000/2K3000/3A5000/3C5000 <<
543 81
544 CPUs without h/w unaligned access su !! 82 config MMU_MOTOROLA
545 Loongson-2K500/2K1000. <<
546 <<
547 This option is enabled by default to <<
548 on all LoongArch systems. But you ca <<
549 to run kernel only on systems with h <<
550 order to optimise for performance. <<
551 <<
552 config CPU_HAS_FPU <<
553 bool 83 bool
554 default y <<
555 <<
556 config CPU_HAS_LSX <<
557 bool "Support for the Loongson SIMD Ex <<
558 depends on AS_HAS_LSX_EXTENSION <<
559 help <<
560 Loongson SIMD Extension (LSX) introd <<
561 and a set of SIMD instructions to op <<
562 is enabled the kernel will support a <<
563 vector register contexts. If you kno <<
564 running on CPUs which do not support <<
565 not be making use of it then you may <<
566 the size & complexity of your kernel <<
567 <<
568 If unsure, say Y. <<
569 <<
570 config CPU_HAS_LASX <<
571 bool "Support for the Loongson Advance <<
572 depends on CPU_HAS_LSX <<
573 depends on AS_HAS_LASX_EXTENSION <<
574 help <<
575 Loongson Advanced SIMD Extension (LA <<
576 registers and a set of SIMD instruct <<
577 option is enabled the kernel will su <<
578 vector register contexts. If you kno <<
579 running on CPUs which do not support <<
580 not be making use of it then you may <<
581 the size & complexity of your kernel <<
582 <<
583 If unsure, say Y. <<
584 <<
585 config CPU_HAS_LBT <<
586 bool "Support for the Loongson Binary <<
587 depends on AS_HAS_LBT_EXTENSION <<
588 help <<
589 Loongson Binary Translation (LBT) in <<
590 to SCR3), x86/ARM eflags (eflags) an <<
591 Enabling this option allows the kern <<
592 specific to LBT. <<
593 <<
594 If you want to use this feature, suc <<
595 Translator (LAT), say Y. <<
596 84
597 config CPU_HAS_PREFETCH !! 85 config MMU_COLDFIRE
598 bool 86 bool
599 default y <<
600 <<
601 config ARCH_SUPPORTS_KEXEC <<
602 def_bool y <<
603 <<
604 config ARCH_SUPPORTS_CRASH_DUMP <<
605 def_bool y <<
606 <<
607 config ARCH_SELECTS_CRASH_DUMP <<
608 def_bool y <<
609 depends on CRASH_DUMP <<
610 select RELOCATABLE <<
611 87
612 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO !! 88 config MMU_SUN3
613 def_bool CRASH_RESERVE !! 89 bool
>> 90 depends on MMU && !MMU_MOTOROLA && !MMU_COLDFIRE
614 91
615 config RELOCATABLE !! 92 config KEXEC
616 bool "Relocatable kernel" !! 93 bool "kexec system call"
617 select ARCH_HAS_RELR !! 94 depends on M68KCLASSIC
>> 95 select KEXEC_CORE
618 help 96 help
619 This builds the kernel as a Position !! 97 kexec is a system call that implements the ability to shutdown your
620 which retains all relocation metadat !! 98 current kernel, and to start another kernel. It is like a reboot
621 the kernel binary at runtime to a di !! 99 but it is independent of the system firmware. And like a reboot
622 its link address. !! 100 you can start any kernel with it, not just Linux.
623 <<
624 config RANDOMIZE_BASE <<
625 bool "Randomize the address of the ker <<
626 depends on RELOCATABLE <<
627 help <<
628 Randomizes the physical and virtual <<
629 kernel image is loaded, as a securi <<
630 deters exploit attempts relying on <<
631 of kernel internals. <<
632 <<
633 The kernel will be offset by up to <<
634 <<
635 If unsure, say N. <<
636 <<
637 config RANDOMIZE_BASE_MAX_OFFSET <<
638 hex "Maximum KASLR offset" if EXPERT <<
639 depends on RANDOMIZE_BASE <<
640 range 0x0 0x10000000 <<
641 default "0x01000000" <<
642 help <<
643 When KASLR is active, this provides <<
644 be applied to the kernel image. It s <<
645 amount of physical RAM available in <<
646 101
647 This is limited by the size of the l !! 102 The name comes from the similarity to the exec system call.
648 103
649 source "kernel/livepatch/Kconfig" !! 104 It is an ongoing process to be certain the hardware in a machine
>> 105 is properly shutdown, so do not be surprised if this code does not
>> 106 initially work for you. As of this writing the exact hardware
>> 107 interface is strongly in flux, so no good recommendation can be
>> 108 made.
650 109
651 config PARAVIRT !! 110 config BOOTINFO_PROC
652 bool "Enable paravirtualization code" !! 111 bool "Export bootinfo in procfs"
653 depends on AS_HAS_LVZ_EXTENSION !! 112 depends on KEXEC && M68KCLASSIC
654 help 113 help
655 This changes the kernel so it can mo !! 114 Say Y to export the bootinfo used to boot the kernel in a
656 under a hypervisor, potentially impr !! 115 "bootinfo" file in procfs. This is useful with kexec.
657 over full virtualization. However, <<
658 the kernel is theoretically slower a <<
659 <<
660 config PARAVIRT_TIME_ACCOUNTING <<
661 bool "Paravirtual steal time accountin <<
662 depends on PARAVIRT <<
663 help <<
664 Select this option to enable fine gr <<
665 accounting. Time spent executing oth <<
666 the current vCPU is discounted from <<
667 that, there can be a small performan <<
668 <<
669 If in doubt, say N here. <<
670 <<
671 endmenu <<
672 <<
673 config ARCH_SELECT_MEMORY_MODEL <<
674 def_bool y <<
675 116
676 config ARCH_FLATMEM_ENABLE !! 117 menu "Platform setup"
677 def_bool y <<
678 depends on !NUMA <<
679 <<
680 config ARCH_SPARSEMEM_ENABLE <<
681 def_bool y <<
682 select SPARSEMEM_VMEMMAP_ENABLE <<
683 help <<
684 Say Y to support efficient handling <<
685 for architectures which are either N <<
686 or have huge holes in the physical a <<
687 See <file:Documentation/mm/numa.rst> <<
688 118
689 config ARCH_MEMORY_PROBE !! 119 source "arch/m68k/Kconfig.cpu"
690 def_bool y <<
691 depends on MEMORY_HOTPLUG <<
692 120
693 config MMU !! 121 source "arch/m68k/Kconfig.machine"
694 bool <<
695 default y <<
696 122
697 config ARCH_MMAP_RND_BITS_MIN !! 123 source "arch/m68k/Kconfig.bus"
698 default 12 <<
699 124
700 config ARCH_MMAP_RND_BITS_MAX !! 125 endmenu
701 default 18 <<
702 126
703 config ARCH_SUPPORTS_UPROBES !! 127 menu "Kernel Features"
704 def_bool y <<
705 128
706 config KASAN_SHADOW_OFFSET !! 129 endmenu
707 hex <<
708 default 0x0 <<
709 depends on KASAN <<
710 130
>> 131 if !MMU
711 menu "Power management options" 132 menu "Power management options"
712 133
713 config ARCH_SUSPEND_POSSIBLE !! 134 config PM
714 def_bool y !! 135 bool "Power Management support"
715 !! 136 help
716 config ARCH_HIBERNATION_POSSIBLE !! 137 Support processor power management modes
717 def_bool y <<
718 <<
719 source "kernel/power/Kconfig" <<
720 source "drivers/acpi/Kconfig" <<
721 source "drivers/cpufreq/Kconfig" <<
722 138
723 endmenu 139 endmenu
>> 140 endif
724 141
725 source "arch/loongarch/kvm/Kconfig" !! 142 source "arch/m68k/Kconfig.devices"
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