1 # SPDX-License-Identifier: GPL-2.0 !! 1 #
2 config LOONGARCH !! 2 # For a description of the syntax of this configuration file,
>> 3 # see Documentation/kbuild/kconfig-language.txt.
>> 4 #
>> 5 config M68K
3 bool 6 bool
4 default y 7 default y
5 select ACPI <<
6 select ACPI_GENERIC_GSI if ACPI <<
7 select ACPI_MCFG if ACPI <<
8 select ACPI_HOTPLUG_CPU if ACPI_PROCES <<
9 select ACPI_PPTT if ACPI <<
10 select ACPI_SYSTEM_POWER_STATES_SUPPOR <<
11 select ARCH_BINFMT_ELF_STATE <<
12 select ARCH_DISABLE_KASAN_INLINE <<
13 select ARCH_ENABLE_MEMORY_HOTPLUG <<
14 select ARCH_ENABLE_MEMORY_HOTREMOVE <<
15 select ARCH_ENABLE_THP_MIGRATION if TR <<
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 <<
87 select GENERIC_CPU_VULNERABILITIES <<
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 <<
95 select GENERIC_LIB_ASHLDI3 <<
96 select GENERIC_LIB_ASHRDI3 <<
97 select GENERIC_LIB_CMPDI2 <<
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 <<
122 select HAVE_CONTEXT_TRACKING_USER <<
123 select HAVE_C_RECORDMCOUNT <<
124 select HAVE_DEBUG_KMEMLEAK <<
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 <<
152 select HAVE_NMI <<
153 select HAVE_OBJTOOL if AS_HAS_EXPLICIT <<
154 select HAVE_PCI <<
155 select HAVE_PERF_EVENTS <<
156 select HAVE_PERF_REGS <<
157 select HAVE_PERF_USER_STACK_DUMP <<
158 select HAVE_PREEMPT_DYNAMIC_KEY <<
159 select HAVE_REGS_AND_STACK_ACCESS_API <<
160 select HAVE_RELIABLE_STACKTRACE if UNW <<
161 select HAVE_RETHOOK <<
162 select HAVE_RSEQ <<
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 <<
200 config 32BIT <<
201 bool <<
202 <<
203 config 64BIT <<
204 def_bool y <<
205 <<
206 config GENERIC_BUG <<
207 def_bool y <<
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 <<
217 config GENERIC_CSUM <<
218 def_bool y <<
219 <<
220 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 <<
229 default y <<
230 <<
231 config STACKTRACE_SUPPORT <<
232 bool <<
233 default y <<
234 <<
235 # MACH_LOONGSON32 and MACH_LOONGSON64 are deli <<
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 <<
255 <<
256 config PGTABLE_LEVELS <<
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 <<
264 default y <<
265 <<
266 config AS_HAS_EXPLICIT_RELOCS <<
267 def_bool $(as-instr,x:pcalau12i \$t0$( <<
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 <<
490 config NODES_SHIFT <<
491 int <<
492 default "6" <<
493 depends on NUMA <<
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 <<
508 The page size is not necessarily 4KB <<
509 when choosing a value for this optio <<
510 <<
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 <<
534 config ARCH_STRICT_ALIGN <<
535 bool "Enable -mstrict-align to prevent <<
536 default y <<
537 help <<
538 Not all LoongArch cores support h/w <<
539 -mstrict-align build parameter to pr <<
540 <<
541 CPUs with h/w unaligned access suppo <<
542 Loongson-2K2000/2K3000/3A5000/3C5000 <<
543 <<
544 CPUs without h/w unaligned access su <<
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 <<
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 8
568 If unsure, say Y. !! 9 config MMU
>> 10 bool
>> 11 default y
569 12
570 config CPU_HAS_LASX !! 13 config UID16
571 bool "Support for the Loongson Advance !! 14 bool
572 depends on CPU_HAS_LSX !! 15 default y
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 16
583 If unsure, say Y. !! 17 config RWSEM_GENERIC_SPINLOCK
>> 18 bool
>> 19 default y
584 20
585 config CPU_HAS_LBT !! 21 config RWSEM_XCHGADD_ALGORITHM
586 bool "Support for the Loongson Binary !! 22 bool
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 23
594 If you want to use this feature, suc <<
595 Translator (LAT), say Y. <<
596 24
597 config CPU_HAS_PREFETCH !! 25 mainmenu "Linux/68k Kernel Configuration"
598 bool <<
599 default y <<
600 26
601 config ARCH_SUPPORTS_KEXEC !! 27 source "init/Kconfig"
602 def_bool y !! 28
>> 29
>> 30 menu "Platform dependent setup"
>> 31
>> 32 config EISA
>> 33 bool
>> 34 ---help---
>> 35 The Extended Industry Standard Architecture (EISA) bus was
>> 36 developed as an open alternative to the IBM MicroChannel bus.
603 37
604 config ARCH_SUPPORTS_CRASH_DUMP !! 38 The EISA bus provided some of the features of the IBM MicroChannel
605 def_bool y !! 39 bus while maintaining backward compatibility with cards made for
>> 40 the older ISA bus. The EISA bus saw limited use between 1988 and
>> 41 1995 when it was made obsolete by the PCI bus.
606 42
607 config ARCH_SELECTS_CRASH_DUMP !! 43 Say Y here if you are building a kernel for an EISA-based machine.
608 def_bool y <<
609 depends on CRASH_DUMP <<
610 select RELOCATABLE <<
611 44
612 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATIO !! 45 Otherwise, say N.
613 def_bool CRASH_RESERVE <<
614 46
615 config RELOCATABLE !! 47 config MCA
616 bool "Relocatable kernel" !! 48 bool
617 select ARCH_HAS_RELR !! 49 help
>> 50 MicroChannel Architecture is found in some IBM PS/2 machines and
>> 51 laptops. It is a bus system similar to PCI or ISA. See
>> 52 <file:Documentation/mca.txt> (and especially the web page given
>> 53 there) before attempting to build an MCA bus kernel.
>> 54
>> 55 config PCMCIA
>> 56 tristate
>> 57 ---help---
>> 58 Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
>> 59 computer. These are credit-card size devices such as network cards,
>> 60 modems or hard drives often used with laptops computers. There are
>> 61 actually two varieties of these cards: the older 16 bit PCMCIA cards
>> 62 and the newer 32 bit CardBus cards. If you want to use CardBus
>> 63 cards, you need to say Y here and also to "CardBus support" below.
>> 64
>> 65 To use your PC-cards, you will need supporting software from David
>> 66 Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
>> 67 for location). Please also read the PCMCIA-HOWTO, available from
>> 68 <http://www.tldp.org/docs.html#howto>.
>> 69
>> 70 To compile this driver as modules, choose M here: the
>> 71 modules will be called pcmcia_core and ds.
>> 72
>> 73 config AMIGA
>> 74 bool "Amiga support"
>> 75 help
>> 76 This option enables support for the Amiga series of computers. If
>> 77 you plan to use this kernel on an Amiga, say Y here and browse the
>> 78 material available in <file:Documentation/m68k>; otherwise say N.
>> 79
>> 80 config ATARI
>> 81 bool "Atari support"
>> 82 help
>> 83 This option enables support for the 68000-based Atari series of
>> 84 computers (including the TT, Falcon and Medusa). If you plan to use
>> 85 this kernel on an Atari, say Y here and browse the material
>> 86 available in <file:Documentation/m68k>; otherwise say N.
>> 87
>> 88 config HADES
>> 89 bool "Hades support"
>> 90 depends on ATARI && BROKEN
618 help 91 help
619 This builds the kernel as a Position !! 92 This option enables support for the Hades Atari clone. If you plan
620 which retains all relocation metadat !! 93 to use this kernel on a Hades, say Y here; otherwise say N.
621 the kernel binary at runtime to a di <<
622 its link address. <<
623 94
624 config RANDOMIZE_BASE !! 95 config PCI
625 bool "Randomize the address of the ker !! 96 bool
626 depends on RELOCATABLE !! 97 depends on HADES
>> 98 default y
627 help 99 help
628 Randomizes the physical and virtual !! 100 Find out whether you have a PCI motherboard. PCI is the name of a
629 kernel image is loaded, as a securi !! 101 bus system, i.e. the way the CPU talks to the other stuff inside
630 deters exploit attempts relying on !! 102 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
631 of kernel internals. !! 103 VESA. If you have PCI, say Y, otherwise N.
>> 104
>> 105 The PCI-HOWTO, available from
>> 106 <http://www.tldp.org/docs.html#howto>, contains valuable
>> 107 information about which PCI hardware does work under Linux and which
>> 108 doesn't.
>> 109
>> 110 config MAC
>> 111 bool "Macintosh support"
>> 112 help
>> 113 This option enables support for the Apple Macintosh series of
>> 114 computers (yes, there is experimental support now, at least for part
>> 115 of the series).
632 116
633 The kernel will be offset by up to !! 117 Say N unless you're willing to code the remaining necessary support.
>> 118 ;)
634 119
635 If unsure, say N. !! 120 config NUBUS
>> 121 bool
>> 122 depends on MAC
>> 123 default y
>> 124
>> 125 config M68K_L2_CACHE
>> 126 bool
>> 127 depends on MAC
>> 128 default y
636 129
637 config RANDOMIZE_BASE_MAX_OFFSET !! 130 config APOLLO
638 hex "Maximum KASLR offset" if EXPERT !! 131 bool "Apollo support"
639 depends on RANDOMIZE_BASE <<
640 range 0x0 0x10000000 <<
641 default "0x01000000" <<
642 help 132 help
643 When KASLR is active, this provides !! 133 Say Y here if you want to run Linux on an MC680x0-based Apollo
644 be applied to the kernel image. It s !! 134 Domain workstation such as the DN3500.
645 amount of physical RAM available in <<
646 135
647 This is limited by the size of the l !! 136 config VME
>> 137 bool "VME (Motorola and BVM) support"
>> 138 help
>> 139 Say Y here if you want to build a kernel for a 680x0 based VME
>> 140 board. Boards currently supported include Motorola boards MVME147,
>> 141 MVME162, MVME166, MVME167, MVME172, and MVME177. BVME4000 and
>> 142 BVME6000 boards from BVM Ltd are also supported.
>> 143
>> 144 config MVME147
>> 145 bool "MVME147 support"
>> 146 depends on VME
>> 147 help
>> 148 Say Y to include support for early Motorola VME boards. This will
>> 149 build a kernel which can run on MVME147 single-board computers. If
>> 150 you select this option you will have to select the appropriate
>> 151 drivers for SCSI, Ethernet and serial ports later on.
>> 152
>> 153 config MVME16x
>> 154 bool "MVME162, 166 and 167 support"
>> 155 depends on VME
>> 156 help
>> 157 Say Y to include support for Motorola VME boards. This will build a
>> 158 kernel which can run on MVME162, MVME166, MVME167, MVME172, and
>> 159 MVME177 boards. If you select this option you will have to select
>> 160 the appropriate drivers for SCSI, Ethernet and serial ports later
>> 161 on.
>> 162
>> 163 config BVME6000
>> 164 bool "BVME4000 and BVME6000 support"
>> 165 depends on VME
>> 166 help
>> 167 Say Y to include support for VME boards from BVM Ltd. This will
>> 168 build a kernel which can run on BVME4000 and BVME6000 boards. If
>> 169 you select this option you will have to select the appropriate
>> 170 drivers for SCSI, Ethernet and serial ports later on.
>> 171
>> 172 config HP300
>> 173 bool "HP9000/300 support"
>> 174 help
>> 175 This option enables support for the HP9000/300 series of
>> 176 workstations. Support for these machines is still very experimental.
>> 177 If you plan to try to use the kernel on such a machine say Y here.
>> 178 Everybody else says N.
>> 179
>> 180 config DIO
>> 181 bool "DIO bus support"
>> 182 depends on HP300
>> 183 help
>> 184 Say Y here to enable support for the "DIO" expansion bus used in
>> 185 HP300 machines. If you are using such a system you almost certainly
>> 186 want this.
>> 187
>> 188 config SUN3X
>> 189 bool "Sun3x support"
>> 190 help
>> 191 This option enables support for the Sun 3x series of workstations.
>> 192 Be warned that this support is very experimental. You will also want
>> 193 to say Y to 68030 support and N to the other processors below.
>> 194 Note that Sun 3x kernels are not compatible with Sun 3 hardware.
>> 195 General Linux information on the Sun 3x series (now discontinued)
>> 196 is at <http://www.angelfire.com/ca2/tech68k/sun3.html>.
>> 197
>> 198 If you don't want to compile a kernel for a Sun 3x, say N.
>> 199
>> 200 config SUN3
>> 201 bool "Sun3 support"
>> 202 help
>> 203 This option enables support for the Sun 3 series of workstations
>> 204 (3/50, 3/60, 3/1xx, 3/2xx systems). Enabling this option requires
>> 205 that all other hardware types must be disabled, as Sun 3 kernels
>> 206 are incompatible with all other m68k targets (including Sun 3x!).
>> 207 Also, you will want to say Y to 68020 support and N to the other
>> 208 processors below.
>> 209
>> 210 If you don't want to compile a kernel exclusively for a Sun 3, say N.
>> 211
>> 212 config Q40
>> 213 bool "Q40/Q60 support"
>> 214 help
>> 215 The Q40 is a Motorola 68040-based successor to the Sinclair QL
>> 216 manufactured in Germany. There is an official Q40 home page at
>> 217 <http://www.q40.de/>. This option enables support for the Q40 and
>> 218 Q60. Select your CPU below. For 68LC060 don't forget to enable FPU
>> 219 emulation.
>> 220
>> 221 comment "Processor type"
>> 222
>> 223 config M68020
>> 224 bool "68020 support"
>> 225 help
>> 226 If you anticipate running this kernel on a computer with a MC68020
>> 227 processor, say Y. Otherwise, say N. Note that the 68020 requires a
>> 228 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
>> 229 Sun 3, which provides its own version.
>> 230
>> 231 config M68030
>> 232 bool "68030 support"
>> 233 help
>> 234 If you anticipate running this kernel on a computer with a MC68030
>> 235 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
>> 236 work, as it does not include an MMU (Memory Management Unit).
>> 237
>> 238 config M68040
>> 239 bool "68040 support"
>> 240 help
>> 241 If you anticipate running this kernel on a computer with a MC68LC040
>> 242 or MC68040 processor, say Y. Otherwise, say N. Note that an
>> 243 MC68EC040 will not work, as it does not include an MMU (Memory
>> 244 Management Unit).
>> 245
>> 246 config M68060
>> 247 bool "68060 support"
>> 248 help
>> 249 If you anticipate running this kernel on a computer with a MC68060
>> 250 processor, say Y. Otherwise, say N.
>> 251
>> 252 config M68KFPU_EMU
>> 253 bool "Math emulation support (EXPERIMENTAL)"
>> 254 depends on EXPERIMENTAL
>> 255 help
>> 256 At some point in the future, this will cause floating-point math
>> 257 instructions to be emulated by the kernel on machines that lack a
>> 258 floating-point math coprocessor. Thrill-seekers and chronically
>> 259 sleep-deprived psychotic hacker types can say Y now, everyone else
>> 260 should probably wait a while.
>> 261
>> 262 config M68KFPU_EMU_EXTRAPREC
>> 263 bool "Math emulation extra precision"
>> 264 depends on M68KFPU_EMU
>> 265 help
>> 266 The fpu uses normally a few bit more during calculations for
>> 267 correct rounding, the emulator can (often) do the same but this
>> 268 extra calculation can cost quite some time, so you can disable
>> 269 it here. The emulator will then "only" calculate with a 64 bit
>> 270 mantissa and round slightly incorrect, what is more then enough
>> 271 for normal usage.
>> 272
>> 273 config M68KFPU_EMU_ONLY
>> 274 bool "Math emulation only kernel"
>> 275 depends on M68KFPU_EMU
>> 276 help
>> 277 This option prevents any floating-point instructions from being
>> 278 compiled into the kernel, thereby the kernel doesn't save any
>> 279 floating point context anymore during task switches, so this
>> 280 kernel will only be usable on machines without a floating-point
>> 281 math coprocessor. This makes the kernel a bit faster as no tests
>> 282 needs to be executed whether a floating-point instruction in the
>> 283 kernel should be executed or not.
>> 284
>> 285 config ADVANCED
>> 286 bool "Advanced configuration options"
>> 287 ---help---
>> 288 This gives you access to some advanced options for the CPU. The
>> 289 defaults should be fine for most users, but these options may make
>> 290 it possible for you to improve performance somewhat if you know what
>> 291 you are doing.
>> 292
>> 293 Note that the answer to this question won't directly affect the
>> 294 kernel: saying N will just cause the configurator to skip all
>> 295 the questions about these options.
>> 296
>> 297 Most users should say N to this question.
>> 298
>> 299 config RMW_INSNS
>> 300 bool "Use read-modify-write instructions"
>> 301 depends on ADVANCED
>> 302 ---help---
>> 303 This allows to use certain instructions that work with indivisible
>> 304 read-modify-write bus cycles. While this is faster than the
>> 305 workaround of disabling interrupts, it can conflict with DMA
>> 306 ( = direct memory access) on many Amiga systems, and it is also said
>> 307 to destabilize other machines. It is very likely that this will
>> 308 cause serious problems on any Amiga or Atari Medusa if set. The only
>> 309 configuration where it should work are 68030-based Ataris, where it
>> 310 apparently improves performance. But you've been warned! Unless you
>> 311 really know what you are doing, say N. Try Y only if you're quite
>> 312 adventurous.
>> 313
>> 314 config SINGLE_MEMORY_CHUNK
>> 315 bool "Use one physical chunk of memory only"
>> 316 depends on ADVANCED && !SUN3
>> 317 help
>> 318 Ignore all but the first contiguous chunk of physical memory for VM
>> 319 purposes. This will save a few bytes kernel size and may speed up
>> 320 some operations. Say N if not sure.
>> 321
>> 322 config 060_WRITETHROUGH
>> 323 bool "Use write-through caching for 68060 supervisor accesses"
>> 324 depends on ADVANCED && M68060
>> 325 ---help---
>> 326 The 68060 generally uses copyback caching of recently accessed data.
>> 327 Copyback caching means that memory writes will be held in an on-chip
>> 328 cache and only written back to memory some time later. Saying Y
>> 329 here will force supervisor (kernel) accesses to use writethrough
>> 330 caching. Writethrough caching means that data is written to memory
>> 331 straight away, so that cache and memory data always agree.
>> 332 Writethrough caching is less efficient, but is needed for some
>> 333 drivers on 68060 based systems where the 68060 bus snooping signal
>> 334 is hardwired on. The 53c710 SCSI driver is known to suffer from
>> 335 this problem.
>> 336
>> 337 endmenu
648 338
649 source "kernel/livepatch/Kconfig" <<
650 339
651 config PARAVIRT !! 340 menu "General setup"
652 bool "Enable paravirtualization code" !! 341
653 depends on AS_HAS_LVZ_EXTENSION !! 342 source "fs/Kconfig.binfmt"
654 help !! 343
655 This changes the kernel so it can mo !! 344 config ZORRO
656 under a hypervisor, potentially impr !! 345 bool "Amiga Zorro (AutoConfig) bus support"
657 over full virtualization. However, !! 346 depends on AMIGA
658 the kernel is theoretically slower a !! 347 help
>> 348 This enables support for the Zorro bus in the Amiga. If you have
>> 349 expansion cards in your Amiga that conform to the Amiga
>> 350 AutoConfig(tm) specification, say Y, otherwise N. Note that even
>> 351 expansion cards that do not fit in the Zorro slots but fit in e.g.
>> 352 the CPU slot may fall in this category, so you have to say Y to let
>> 353 Linux use these.
>> 354
>> 355 config AMIGA_PCMCIA
>> 356 bool "Amiga 1200/600 PCMCIA support (EXPERIMENTAL)"
>> 357 depends on AMIGA && EXPERIMENTAL
>> 358 help
>> 359 Include support in the kernel for pcmcia on Amiga 1200 and Amiga
>> 360 600. If you intend to use pcmcia cards say Y; otherwise say N.
>> 361
>> 362 config STRAM_SWAP
>> 363 bool "Support for ST-RAM as swap space"
>> 364 depends on ATARI && BROKEN
>> 365 ---help---
>> 366 Some Atari 68k macines (including the 520STF and 1020STE) divide
>> 367 their addressible memory into ST and TT sections. The TT section
>> 368 (up to 512MB) is the main memory; the ST section (up to 4MB) is
>> 369 accessible to the built-in graphics board, runs slower, and is
>> 370 present mainly for backward compatibility with older machines.
>> 371
>> 372 This enables support for using (parts of) ST-RAM as swap space,
>> 373 instead of as normal system memory. This can first enhance system
>> 374 performance if you have lots of alternate RAM (compared to the size
>> 375 of ST-RAM), because executable code always will reside in faster
>> 376 memory. ST-RAM will remain as ultra-fast swap space. On the other
>> 377 hand, it allows much improved dynamic allocations of ST-RAM buffers
>> 378 for device driver modules (e.g. floppy, ACSI, SLM printer, DMA
>> 379 sound). The probability that such allocations at module load time
>> 380 fail is drastically reduced.
>> 381
>> 382 config STRAM_PROC
>> 383 bool "ST-RAM statistics in /proc"
>> 384 depends on ATARI
>> 385 help
>> 386 Say Y here to report ST-RAM usage statistics in /proc/stram. See
>> 387 the help for CONFIG_STRAM_SWAP for discussion of ST-RAM and its
>> 388 uses.
>> 389
>> 390 config HEARTBEAT
>> 391 bool "Use power LED as a heartbeat" if AMIGA || APOLLO || ATARI || MAC ||Q40
>> 392 default y if !AMIGA && !APOLLO && !ATARI && !MAC && !Q40 && HP300
>> 393 help
>> 394 Use the power-on LED on your machine as a load meter. The exact
>> 395 behavior is platform-dependent, but normally the flash frequency is
>> 396 a hyperbolic function of the 5-minute load average.
>> 397
>> 398 # We have a dedicated heartbeat LED. :-)
>> 399 config PROC_HARDWARE
>> 400 bool "/proc/hardware support"
>> 401 help
>> 402 Say Y here to support the /proc/hardware file, which gives you
>> 403 access to information about the machine you're running on,
>> 404 including the model, CPU, MMU, clock speed, BogoMIPS rating,
>> 405 and memory size.
>> 406
>> 407 config PARPORT
>> 408 tristate "Parallel port support (EXPERIMENTAL)"
>> 409 depends on EXPERIMENTAL
>> 410 ---help---
>> 411 If you want to use devices connected to your machine's parallel port
>> 412 (the connector at the computer with 25 holes), e.g. printer, ZIP
>> 413 drive, PLIP link (Parallel Line Internet Protocol is mainly used to
>> 414 create a mini network by connecting the parallel ports of two local
>> 415 machines) etc., then you need to say Y here; please read
>> 416 <file:Documentation/parport.txt> and
>> 417 <file:drivers/parport/BUGS-parport>.
>> 418
>> 419 For extensive information about drivers for many devices attaching
>> 420 to the parallel port see <http://www.torque.net/linux-pp.html> on
>> 421 the WWW.
>> 422
>> 423 It is possible to share a single parallel port among several devices
>> 424 and it is safe to compile all the corresponding drivers into the
>> 425 kernel. To compile parallel port support as a module, choose M here:
>> 426 the module will be called parport.
>> 427 If you have more than one parallel port and want to specify which
>> 428 port and IRQ to be used by this driver at module load time, take a
>> 429 look at <file:Documentation/parport.txt>.
>> 430
>> 431 If unsure, say Y.
659 432
660 config PARAVIRT_TIME_ACCOUNTING !! 433 config PARPORT_AMIGA
661 bool "Paravirtual steal time accountin !! 434 tristate "Amiga builtin port"
662 depends on PARAVIRT !! 435 depends on AMIGA && PARPORT
>> 436 help
>> 437 Say Y here if you need support for the parallel port hardware on
>> 438 Amiga machines. This code is also available as a module (say M),
>> 439 called parport_amiga. If in doubt, saying N is the safe plan.
>> 440
>> 441 config PARPORT_MFC3
>> 442 tristate "Multiface III parallel port"
>> 443 depends on ZORRO && PARPORT
>> 444 help
>> 445 Say Y here if you need parallel port support for the MFC3 card.
>> 446 This code is also available as a module (say M), called
>> 447 parport_mfc3. If in doubt, saying N is the safe plan.
>> 448
>> 449 config PARPORT_PC
>> 450 bool
>> 451 depends on Q40 && PARPORT
>> 452 default y
>> 453 ---help---
>> 454 You should say Y here if you have a PC-style parallel port. All IBM
>> 455 PC compatible computers and some Alphas have PC-style parallel
>> 456 ports.
>> 457
>> 458 To compile this driver as a module, choose M here: the
>> 459 module will be called parport_pc.
>> 460
>> 461 If unsure, say Y.
>> 462
>> 463 config PARPORT_ATARI
>> 464 tristate "Atari builtin port"
>> 465 depends on ATARI && PARPORT
>> 466 help
>> 467 Say Y here if you need support for the parallel port hardware on
>> 468 Atari machines. This code is also available as a module (say M),
>> 469 called parport_atari. If in doubt, saying N is the safe plan.
>> 470
>> 471 config PRINTER
>> 472 tristate "Parallel printer support"
>> 473 depends on PARPORT
>> 474 ---help---
>> 475 If you intend to attach a printer to the parallel port of your Linux
>> 476 box (as opposed to using a serial printer; if the connector at the
>> 477 printer has 9 or 25 holes ["female"], then it's serial), say Y.
>> 478 Also read the Printing-HOWTO, available from
>> 479 <http://www.tldp.org/docs.html#howto>.
>> 480
>> 481 It is possible to share one parallel port among several devices
>> 482 (e.g. printer and ZIP drive) and it is safe to compile the
>> 483 corresponding drivers into the kernel.
>> 484 To compile this driver as a module, choose M here and read
>> 485 <file:Documentation/parport.txt>. The module will be called lp.
>> 486
>> 487 If you have several parallel ports, you can specify which ports to
>> 488 use with the "lp" kernel command line option. (Try "man bootparam"
>> 489 or see the documentation of your boot loader (lilo or loadlin) about
>> 490 how to pass options to the kernel at boot time.) The syntax of the
>> 491 "lp" command line option can be found in <file:drivers/char/lp.c>.
>> 492
>> 493 If you have more than 8 printers, you need to increase the LP_NO
>> 494 macro in lp.c and the PARPORT_MAX macro in parport.h.
>> 495
>> 496 config PARPORT_1284
>> 497 bool "IEEE 1284 transfer modes"
>> 498 depends on PRINTER
>> 499 help
>> 500 If you have a printer that supports status readback or device ID, or
>> 501 want to use a device that uses enhanced parallel port transfer modes
>> 502 such as EPP and ECP, say Y here to enable advanced IEEE 1284
>> 503 transfer modes. Also say Y if you want device ID information to
>> 504 appear in /proc/sys/dev/parport/*/autoprobe*. It is safe to say N.
>> 505
>> 506 config ISA
>> 507 bool
>> 508 depends on Q40 || AMIGA_PCMCIA || GG2
>> 509 default y
663 help 510 help
664 Select this option to enable fine gr !! 511 Find out whether you have ISA slots on your motherboard. ISA is the
665 accounting. Time spent executing oth !! 512 name of a bus system, i.e. the way the CPU talks to the other stuff
666 the current vCPU is discounted from !! 513 inside your box. Other bus systems are PCI, EISA, MicroChannel
667 that, there can be a small performan !! 514 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 515 newer boards don't support it. If you have ISA, say Y, otherwise N.
>> 516
>> 517 config GENERIC_ISA_DMA
>> 518 bool
>> 519 depends on Q40 || AMIGA_PCMCIA || GG2
>> 520 default y
668 521
669 If in doubt, say N here. !! 522 source "drivers/pci/Kconfig"
>> 523
>> 524 source "drivers/zorro/Kconfig"
>> 525
>> 526 if Q40
>> 527 source "drivers/pnp/Kconfig"
>> 528 endif
670 529
671 endmenu 530 endmenu
672 531
673 config ARCH_SELECT_MEMORY_MODEL !! 532 source "drivers/base/Kconfig"
674 def_bool y <<
675 533
676 config ARCH_FLATMEM_ENABLE !! 534 source "drivers/mtd/Kconfig"
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 <<
689 config ARCH_MEMORY_PROBE <<
690 def_bool y <<
691 depends on MEMORY_HOTPLUG <<
692 535
693 config MMU !! 536 source "drivers/block/Kconfig"
>> 537
>> 538 source "drivers/md/Kconfig"
>> 539
>> 540 source "drivers/input/Kconfig"
>> 541
>> 542 source "drivers/ide/Kconfig"
>> 543
>> 544 source "drivers/scsi/Kconfig"
>> 545
>> 546 source "net/Kconfig"
>> 547
>> 548
>> 549 menu "Character devices"
>> 550
>> 551 config SERIAL
>> 552 tristate "Q40 Standard/generic serial support" if Q40
>> 553 default DN_SERIAL if APOLLO
>> 554 ---help---
>> 555 This selects whether you want to include the driver for the standard
>> 556 serial ports. The standard answer is Y. People who might say N
>> 557 here are those that are setting up dedicated Ethernet WWW/FTP
>> 558 servers, or users that have one of the various bus mice instead of a
>> 559 serial mouse and don't intend to use their machine's standard serial
>> 560 port for anything. (Note that the Cyclades and Stallion multi
>> 561 serial port drivers do not need this driver built in for them to
>> 562 work.)
>> 563
>> 564 To compile this driver as a module, choose M here: the
>> 565 module will be called serial.
>> 566 [WARNING: Do not compile this driver as a module if you are using
>> 567 non-standard serial ports, since the configuration information will
>> 568 be lost when the driver is unloaded. This limitation may be lifted
>> 569 in the future.]
>> 570
>> 571 BTW1: If you have a mouseman serial mouse which is not recognized by
>> 572 the X window system, try running gpm first.
>> 573
>> 574 BTW2: If you intend to use a software modem (also called Winmodem)
>> 575 under Linux, forget it. These modems are crippled and require
>> 576 proprietary drivers which are only available under Windows.
>> 577
>> 578 Most people will say Y or M here, so that they can use serial mice,
>> 579 modems and similar devices connecting to the standard serial ports.
>> 580
>> 581 config SERIAL_EXTENDED
>> 582 bool "Extended dumb serial driver options"
>> 583 depends on SERIAL=y
>> 584 help
>> 585 If you wish to use any non-standard features of the standard "dumb"
>> 586 driver, say Y here. This includes HUB6 support, shared serial
>> 587 interrupts, special multiport support, support for more than the
>> 588 four COM 1/2/3/4 boards, etc.
>> 589
>> 590 Note that the answer to this question won't directly affect the
>> 591 kernel: saying N will just cause the configurator to skip all
>> 592 the questions about serial driver options. If unsure, say N.
>> 593
>> 594 config SERIAL_MANY_PORTS
>> 595 bool "Support more than 4 serial ports"
>> 596 depends on SERIAL_EXTENDED
>> 597 help
>> 598 Say Y here if you have dumb serial boards other than the four
>> 599 standard COM 1/2/3/4 ports. This may happen if you have an AST
>> 600 FourPort, Accent Async, Boca (read the Boca mini-HOWTO, available
>> 601 from <http://www.tldp.org/docs.html#howto>), or other custom
>> 602 serial port hardware which acts similar to standard serial port
>> 603 hardware. If you only use the standard COM 1/2/3/4 ports, you can
>> 604 say N here to save some memory. You can also say Y if you have an
>> 605 "intelligent" multiport card such as Cyclades, Digiboards, etc.
>> 606
>> 607 config SERIAL_SHARE_IRQ
>> 608 bool "Support for sharing serial interrupts"
>> 609 depends on SERIAL_EXTENDED
>> 610 help
>> 611 Some serial boards have hardware support which allows multiple dumb
>> 612 serial ports on the same board to share a single IRQ. To enable
>> 613 support for this in the serial driver, say Y here.
>> 614
>> 615 config SERIAL_MULTIPORT
>> 616 bool "Support special multiport boards"
>> 617 depends on SERIAL_EXTENDED
>> 618 help
>> 619 Some multiport serial ports have special ports which are used to
>> 620 signal when there are any serial ports on the board which need
>> 621 servicing. Say Y here to enable the serial driver to take advantage
>> 622 of those special I/O ports.
>> 623
>> 624 config HUB6
>> 625 bool "Support the Bell Technologies HUB6 card"
>> 626 depends on SERIAL_EXTENDED
>> 627 help
>> 628 Say Y here to enable support in the dumb serial driver to support
>> 629 the HUB6 card.
>> 630
>> 631 config VT
>> 632 bool "Virtual terminal"
>> 633 ---help---
>> 634 If you say Y here, you will get support for terminal devices with
>> 635 display and keyboard devices. These are called "virtual" because you
>> 636 can run several virtual terminals (also called virtual consoles) on
>> 637 one physical terminal. This is rather useful, for example one
>> 638 virtual terminal can collect system messages and warnings, another
>> 639 one can be used for a text-mode user session, and a third could run
>> 640 an X session, all in parallel. Switching between virtual terminals
>> 641 is done with certain key combinations, usually Alt-<function key>.
>> 642
>> 643 The setterm command ("man setterm") can be used to change the
>> 644 properties (such as colors or beeping) of a virtual terminal. The
>> 645 man page console_codes(4) ("man console_codes") contains the special
>> 646 character sequences that can be used to change those properties
>> 647 directly. The fonts used on virtual terminals can be changed with
>> 648 the setfont ("man setfont") command and the key bindings are defined
>> 649 with the loadkeys ("man loadkeys") command.
>> 650
>> 651 You need at least one virtual terminal device in order to make use
>> 652 of your keyboard and monitor. Therefore, only people configuring an
>> 653 embedded system would want to say N here in order to save some
>> 654 memory; the only way to log into such a system is then via a serial
>> 655 or network connection.
>> 656
>> 657 If unsure, say Y, or else you won't be able to do much with your new
>> 658 shiny Linux system :-)
>> 659
>> 660 config VT_CONSOLE
>> 661 bool "Support for console on virtual terminal"
>> 662 depends on VT
>> 663 ---help---
>> 664 The system console is the device which receives all kernel messages
>> 665 and warnings and which allows logins in single user mode. If you
>> 666 answer Y here, a virtual terminal (the device used to interact with
>> 667 a physical terminal) can be used as system console. This is the most
>> 668 common mode of operations, so you should say Y here unless you want
>> 669 the kernel messages be output only to a serial port (in which case
>> 670 you should say Y to "Console on serial port", below).
>> 671
>> 672 If you do say Y here, by default the currently visible virtual
>> 673 terminal (/dev/tty0) will be used as system console. You can change
>> 674 that with a kernel command line option such as "console=tty3" which
>> 675 would use the third virtual terminal as system console. (Try "man
>> 676 bootparam" or see the documentation of your boot loader (lilo or
>> 677 loadlin) about how to pass options to the kernel at boot time.)
>> 678
>> 679 If unsure, say Y.
>> 680
>> 681 config HW_CONSOLE
694 bool 682 bool
>> 683 depends on VT
695 default y 684 default y
696 685
697 config ARCH_MMAP_RND_BITS_MIN !! 686 config NVRAM
698 default 12 !! 687 bool
>> 688 depends on ATARI
>> 689 default y
>> 690 ---help---
>> 691 If you say Y here and create a character special file /dev/nvram
>> 692 with major number 10 and minor number 144 using mknod ("man mknod"),
>> 693 you get read and write access to the 50 bytes of non-volatile memory
>> 694 in the real time clock (RTC), which is contained in every PC and
>> 695 most Ataris.
>> 696
>> 697 This memory is conventionally called "CMOS RAM" on PCs and "NVRAM"
>> 698 on Ataris. /dev/nvram may be used to view settings there, or to
>> 699 change them (with some utility). It could also be used to frequently
>> 700 save a few bits of very important data that may not be lost over
>> 701 power-off and for which writing to disk is too insecure. Note
>> 702 however that most NVRAM space in a PC belongs to the BIOS and you
>> 703 should NEVER idly tamper with it. See Ralf Brown's interrupt list
>> 704 for a guide to the use of CMOS bytes by your BIOS.
>> 705
>> 706 On Atari machines, /dev/nvram is always configured and does not need
>> 707 to be selected.
>> 708
>> 709 To compile this driver as a module, choose M here: the
>> 710 module will be called nvram.
>> 711
>> 712 config ATARI_MFPSER
>> 713 tristate "Atari MFP serial support"
>> 714 depends on ATARI
>> 715 ---help---
>> 716 If you like to use the MFP serial ports ("Modem1", "Serial1") under
>> 717 Linux, say Y. The driver equally supports all kinds of MFP serial
>> 718 ports and automatically detects whether Serial1 is available.
>> 719
>> 720 To compile this driver as a module, choose M here.
>> 721
>> 722 Note for Falcon users: You also have an MFP port, it's just not
>> 723 wired to the outside... But you could use the port under Linux.
>> 724
>> 725 config ATARI_SCC
>> 726 tristate "Atari SCC serial support"
>> 727 depends on ATARI
>> 728 ---help---
>> 729 If you have serial ports based on a Zilog SCC chip (Modem2, Serial2,
>> 730 LAN) and like to use them under Linux, say Y. All built-in SCC's are
>> 731 supported (TT, MegaSTE, Falcon), and also the ST-ESCC. If you have
>> 732 two connectors for channel A (Serial2 and LAN), they are visible as
>> 733 two separate devices.
>> 734
>> 735 To compile this driver as a module, choose M here.
>> 736
>> 737 config ATARI_SCC_DMA
>> 738 bool "Atari SCC serial DMA support"
>> 739 depends on ATARI_SCC
>> 740 help
>> 741 This enables DMA support for receiving data on channel A of the SCC.
>> 742 If you have a TT you may say Y here and read
>> 743 drivers/char/atari_SCC.README. All other users should say N here,
>> 744 because only the TT has SCC-DMA, even if your machine keeps claiming
>> 745 so at boot time.
>> 746
>> 747 config ATARI_MIDI
>> 748 tristate "Atari MIDI serial support"
>> 749 depends on ATARI
>> 750 help
>> 751 If you want to use your Atari's MIDI port in Linux, say Y.
>> 752
>> 753 To compile this driver as a module, choose M here.
>> 754
>> 755 config ATARI_DSP56K
>> 756 tristate "Atari DSP56k support (EXPERIMENTAL)"
>> 757 depends on ATARI && EXPERIMENTAL
>> 758 help
>> 759 If you want to be able to use the DSP56001 in Falcons, say Y. This
>> 760 driver is still experimental, and if you don't know what it is, or
>> 761 if you don't have this processor, just say N.
>> 762
>> 763 To compile this driver as a module, choose M here.
>> 764
>> 765 config AMIGA_BUILTIN_SERIAL
>> 766 tristate "Amiga builtin serial support"
>> 767 depends on AMIGA
>> 768 help
>> 769 If you want to use your Amiga's built-in serial port in Linux,
>> 770 answer Y.
>> 771
>> 772 To compile this driver as a module, choose M here.
>> 773
>> 774 config WHIPPET_SERIAL
>> 775 tristate "Hisoft Whippet PCMCIA serial support"
>> 776 depends on AMIGA_PCMCIA
>> 777 help
>> 778 HiSoft has a web page at <http://www.hisoft.co.uk/>, but there
>> 779 is no listing for the Whippet in their Amiga section.
>> 780
>> 781 config MULTIFACE_III_TTY
>> 782 tristate "Multiface Card III serial support"
>> 783 depends on AMIGA
>> 784 help
>> 785 If you want to use a Multiface III card's serial port in Linux,
>> 786 answer Y.
>> 787
>> 788 To compile this driver as a module, choose M here.
>> 789
>> 790 config A2232
>> 791 tristate "Commodore A2232 serial support (EXPERIMENTAL)"
>> 792 depends on AMIGA && EXPERIMENTAL
>> 793 ---help---
>> 794 This option supports the 2232 7-port serial card shipped with the
>> 795 Amiga 2000 and other Zorro-bus machines, dating from 1989. At
>> 796 a max of 19,200 bps, the ports are served by a 6551 ACIA UART chip
>> 797 each, plus a 8520 CIA, and a master 6502 CPU and buffer as well. The
>> 798 ports were connected with 8 pin DIN connectors on the card bracket,
>> 799 for which 8 pin to DB25 adapters were supplied. The card also had
>> 800 jumpers internally to toggle various pinning configurations.
>> 801
>> 802 This driver can be built as a module; but then "generic_serial"
>> 803 will also be built as a module. This has to be loaded before
>> 804 "ser_a2232". If you want to do this, answer M here.
>> 805
>> 806 config GVPIOEXT
>> 807 tristate "GVP IO-Extender support"
>> 808 depends on PARPORT=n && ZORRO
>> 809 help
>> 810 If you want to use a GVP IO-Extender serial card in Linux, say Y.
>> 811 Otherwise, say N.
>> 812
>> 813 config GVPIOEXT_LP
>> 814 tristate "GVP IO-Extender parallel printer support"
>> 815 depends on GVPIOEXT
>> 816 help
>> 817 Say Y to enable driving a printer from the parallel port on your
>> 818 GVP IO-Extender card, N otherwise.
>> 819
>> 820 config GVPIOEXT_PLIP
>> 821 tristate "GVP IO-Extender PLIP support"
>> 822 depends on GVPIOEXT
>> 823 help
>> 824 Say Y to enable doing IP over the parallel port on your GVP
>> 825 IO-Extender card, N otherwise.
>> 826
>> 827 config MAC_SCC
>> 828 tristate "Macintosh serial support"
>> 829 depends on MAC
>> 830
>> 831 config ADB
>> 832 bool "Apple Desktop Bus (ADB) support"
>> 833 depends on MAC
>> 834 help
>> 835 Apple Desktop Bus (ADB) support is for support of devices which
>> 836 are connected to an ADB port. ADB devices tend to have 4 pins.
>> 837 If you have an Apple Macintosh prior to the iMac, or a
>> 838 "Blue and White G3", you probably want to say Y here. Otherwise
>> 839 say N.
>> 840
>> 841 config ADB_MACII
>> 842 bool "Include Mac II ADB driver"
>> 843 depends on ADB
>> 844 help
>> 845 Say Y here if want your kernel to support Macintosh systems that use
>> 846 the Mac II style ADB. This includes the II, IIx, IIcx, SE/30, IIci,
>> 847 Quadra 610, Quadra 650, Quadra 700, Quadra 800, Centris 610 and
>> 848 Centris 650.
>> 849
>> 850 config ADB_MACIISI
>> 851 bool "Include Mac IIsi ADB driver"
>> 852 depends on ADB
>> 853 help
>> 854 Say Y here if want your kernel to support Macintosh systems that use
>> 855 the Mac IIsi style ADB. This includes the IIsi, IIvi, IIvx, Classic
>> 856 II, LC, LC II, LC III, Performa 460, and the Performa 600.
>> 857
>> 858 config ADB_CUDA
>> 859 bool "Include CUDA ADB driver"
>> 860 depends on ADB
>> 861 help
>> 862 This provides support for CUDA based Power Macintosh systems. This
>> 863 includes most OldWorld PowerMacs, the first generation iMacs, the
>> 864 Blue&White G3 and the Yikes G4 (PCI Graphics). All later models
>> 865 should use CONFIG_ADB_PMU instead.
>> 866
>> 867 If unsure say Y.
>> 868
>> 869 config ADB_IOP
>> 870 bool "Include IOP (IIfx/Quadra 9x0) ADB driver"
>> 871 depends on ADB
>> 872 help
>> 873 The I/O Processor (IOP) is an Apple custom IC designed to provide
>> 874 intelligent support for I/O controllers. It is described at
>> 875 <http://www.angelfire.com/ca2/dev68k/iopdesc.html> to enable direct
>> 876 support for it, say 'Y' here.
>> 877
>> 878 config ADB_PMU68K
>> 879 bool "Include PMU (Powerbook) ADB driver"
>> 880 depends on ADB
>> 881 help
>> 882 Say Y here if want your kernel to support the m68k based Powerbooks.
>> 883 This includes the PowerBook 140, PowerBook 145, PowerBook 150,
>> 884 PowerBook 160, PowerBook 165, PowerBook 165c, PowerBook 170,
>> 885 PowerBook 180, PowerBook, 180c, PowerBook 190cs, PowerBook 520,
>> 886 PowerBook Duo 210, PowerBook Duo 230, PowerBook Duo 250,
>> 887 PowerBook Duo 270c, PowerBook Duo 280 and PowerBook Duo 280c.
>> 888
>> 889 config INPUT_ADBHID
>> 890 bool "Use input layer for ADB devices"
>> 891 depends on MAC && INPUT=y
>> 892 ---help---
>> 893 Say Y here if you want to have ADB (Apple Desktop Bus) HID devices
>> 894 such as keyboards, mice, joysticks, or graphic tablets handled by
>> 895 the input layer. If you say Y here, make sure to say Y to the
>> 896 corresponding drivers "Keyboard support" (CONFIG_INPUT_KEYBDEV),
>> 897 "Mouse Support" (CONFIG_INPUT_MOUSEDEV) and "Event interface
>> 898 support" (CONFIG_INPUT_EVDEV) as well.
>> 899
>> 900 If you say N here, you still have the option of using the old ADB
>> 901 keyboard and mouse drivers.
>> 902
>> 903 If unsure, say Y.
>> 904
>> 905 config MAC_HID
>> 906 bool
>> 907 depends on INPUT_ADBHID
>> 908 default y
699 909
700 config ARCH_MMAP_RND_BITS_MAX !! 910 config MAC_ADBKEYCODES
701 default 18 !! 911 bool "Support for ADB raw keycodes"
>> 912 depends on INPUT_ADBHID
>> 913 help
>> 914 This provides support for sending raw ADB keycodes to console
>> 915 devices. This is the default up to 2.4.0, but in future this may be
>> 916 phased out in favor of generic Linux keycodes. If you say Y here,
>> 917 you can dynamically switch via the
>> 918 /proc/sys/dev/mac_hid/keyboard_sends_linux_keycodes
>> 919 sysctl and with the "keyboard_sends_linux_keycodes=" kernel
>> 920 argument.
>> 921
>> 922 If unsure, say Y here.
>> 923
>> 924 config MAC_EMUMOUSEBTN
>> 925 bool "Support for mouse button 2+3 emulation"
>> 926 depends on INPUT_ADBHID
>> 927 help
>> 928 This provides generic support for emulating the 2nd and 3rd mouse
>> 929 button with keypresses. If you say Y here, the emulation is still
>> 930 disabled by default. The emulation is controlled by these sysctl
>> 931 entries:
>> 932 /proc/sys/dev/mac_hid/mouse_button_emulation
>> 933 /proc/sys/dev/mac_hid/mouse_button2_keycode
>> 934 /proc/sys/dev/mac_hid/mouse_button3_keycode
>> 935
>> 936 config ADB_KEYBOARD
>> 937 bool "Support for ADB keyboard (old driver)"
>> 938 depends on MAC && !INPUT_ADBHID
>> 939 help
>> 940 This option allows you to use an ADB keyboard attached to your
>> 941 machine. Note that this disables any other (ie. PS/2) keyboard
>> 942 support, even if your machine is physically capable of using both at
>> 943 the same time.
>> 944
>> 945 If you use an ADB keyboard (4 pin connector), say Y here.
>> 946 If you use a PS/2 keyboard (6 pin connector), say N here.
>> 947
>> 948 config HPDCA
>> 949 tristate "HP DCA serial support"
>> 950 depends on DIO
>> 951 help
>> 952 If you want to use the internal "DCA" serial ports on an HP300
>> 953 machine, say Y here.
>> 954
>> 955 config MVME147_SCC
>> 956 bool "SCC support for MVME147 serial ports"
>> 957 depends on MVME147
>> 958 help
>> 959 This is the driver for the serial ports on the Motorola MVME147
>> 960 boards. Everyone using one of these boards should say Y here.
>> 961
>> 962 config SERIAL167
>> 963 bool "CD2401 support for MVME166/7 serial ports"
>> 964 depends on MVME16x && BROKEN
>> 965 help
>> 966 This is the driver for the serial ports on the Motorola MVME166,
>> 967 167, and 172 boards. Everyone using one of these boards should say
>> 968 Y here.
>> 969
>> 970 config MVME162_SCC
>> 971 bool "SCC support for MVME162 serial ports"
>> 972 depends on MVME16x
>> 973 help
>> 974 This is the driver for the serial ports on the Motorola MVME162 and
>> 975 172 boards. Everyone using one of these boards should say Y here.
>> 976
>> 977 config BVME6000_SCC
>> 978 bool "SCC support for BVME6000 serial ports"
>> 979 depends on BVME6000
>> 980 help
>> 981 This is the driver for the serial ports on the BVME4000 and BVME6000
>> 982 boards from BVM Ltd. Everyone using one of these boards should say
>> 983 Y here.
>> 984
>> 985 config DN_SERIAL
>> 986 bool "Support for DN serial port (dummy)"
>> 987 depends on APOLLO
>> 988
>> 989 config SERIAL_CONSOLE
>> 990 bool "Support for serial port console"
>> 991 depends on (AMIGA || ATARI || MAC || HP300 || SUN3 || SUN3X || VME || APOLLO) && (ATARI_MFPSER=y || ATARI_SCC=y || ATARI_MIDI=y || MAC_SCC=y || AMIGA_BUILTIN_SERIAL=y || GVPIOEXT=y || MULTIFACE_III_TTY=y || HPDCA=y || SERIAL=y || MVME147_SCC || SERIAL167 || MVME162_SCC || BVME6000_SCC || DN_SERIAL)
>> 992 ---help---
>> 993 If you say Y here, it will be possible to use a serial port as the
>> 994 system console (the system console is the device which receives all
>> 995 kernel messages and warnings and which allows logins in single user
>> 996 mode). This could be useful if some terminal or printer is connected
>> 997 to that serial port.
>> 998
>> 999 Even if you say Y here, the currently visible virtual console
>> 1000 (/dev/tty0) will still be used as the system console by default, but
>> 1001 you can alter that using a kernel command line option such as
>> 1002 "console=ttyS1". (Try "man bootparam" or see the documentation of
>> 1003 your boot loader (lilo or loadlin) about how to pass options to the
>> 1004 kernel at boot time.)
>> 1005
>> 1006 If you don't have a VGA card installed and you say Y here, the
>> 1007 kernel will automatically use the first serial line, /dev/ttyS0, as
>> 1008 system console.
>> 1009
>> 1010 If unsure, say N.
>> 1011
>> 1012 config USERIAL
>> 1013 bool "Support for user serial device modules"
>> 1014
>> 1015 config WATCHDOG
>> 1016 bool "Watchdog Timer Support"
>> 1017 ---help---
>> 1018 If you say Y here (and to one of the following options) and create a
>> 1019 character special file /dev/watchdog with major number 10 and minor
>> 1020 number 130 using mknod ("man mknod"), you will get a watchdog, i.e.:
>> 1021 subsequently opening the file and then failing to write to it for
>> 1022 longer than 1 minute will result in rebooting the machine. This
>> 1023 could be useful for a networked machine that needs to come back
>> 1024 online as fast as possible after a lock-up. There's both a watchdog
>> 1025 implementation entirely in software (which can sometimes fail to
>> 1026 reboot the machine) and a driver for hardware watchdog boards, which
>> 1027 are more robust and can also keep track of the temperature inside
>> 1028 your computer. For details, read <file:Documentation/watchdog.txt>
>> 1029 in the kernel source.
>> 1030
>> 1031 The watchdog is usually used together with the watchdog daemon
>> 1032 which is available from
>> 1033 <ftp://ibiblio.org/pub/Linux/system/daemons/watchdog/>. This daemon can
>> 1034 also monitor NFS connections and can reboot the machine when the process
>> 1035 table is full.
>> 1036
>> 1037 If unsure, say N.
>> 1038
>> 1039 config WATCHDOG_NOWAYOUT
>> 1040 bool "Disable watchdog shutdown on close"
>> 1041 depends on WATCHDOG
>> 1042 help
>> 1043 The default watchdog behaviour (which you get if you say N here) is
>> 1044 to stop the timer if the process managing it closes the file
>> 1045 /dev/watchdog. It's always remotely possible that this process might
>> 1046 get killed. If you say Y here, the watchdog cannot be stopped once
>> 1047 it has been started.
>> 1048
>> 1049 config SOFT_WATCHDOG
>> 1050 bool "Software watchdog"
>> 1051 depends on WATCHDOG
>> 1052 help
>> 1053 A software monitoring watchdog. This will fail to reboot your system
>> 1054 from some situations that the hardware watchdog will recover
>> 1055 from. Equally it's a lot cheaper to install.
>> 1056
>> 1057 To compile this driver as a module, choose M here: the
>> 1058 module will be called softdog.
>> 1059
>> 1060 config GEN_RTC
>> 1061 tristate "Generic /dev/rtc emulation" if !SUN3
>> 1062 default y if SUN3
>> 1063 ---help---
>> 1064 If you say Y here and create a character special file /dev/rtc with
>> 1065 major number 10 and minor number 135 using mknod ("man mknod"), you
>> 1066 will get access to the real time clock (or hardware clock) built
>> 1067 into your computer.
>> 1068
>> 1069 It reports status information via the file /proc/driver/rtc and its
>> 1070 behaviour is set by various ioctls on /dev/rtc. If you enable the
>> 1071 "extended RTC operation" below it will also provide an emulation
>> 1072 for RTC_UIE which is required by some programs and may improve
>> 1073 precision in some cases.
>> 1074
>> 1075 To compile this driver as a module, choose M here: the
>> 1076 module will be called genrtc. To load the module automatically
>> 1077 add 'alias char-major-10-135 genrtc' to your /etc/modules.conf
>> 1078
>> 1079 config GEN_RTC_X
>> 1080 bool "Extended RTC operation"
>> 1081 depends on GEN_RTC
>> 1082 help
>> 1083 Provides an emulation for RTC_UIE which is required by some programs
>> 1084 and may improve precision of the generic RTC support in some cases.
>> 1085
>> 1086 config UNIX98_PTYS
>> 1087 bool "Unix98 PTY support"
>> 1088 ---help---
>> 1089 A pseudo terminal (PTY) is a software device consisting of two
>> 1090 halves: a master and a slave. The slave device behaves identical to
>> 1091 a physical terminal; the master device is used by a process to
>> 1092 read data from and write data to the slave, thereby emulating a
>> 1093 terminal. Typical programs for the master side are telnet servers
>> 1094 and xterms.
>> 1095
>> 1096 Linux has traditionally used the BSD-like names /dev/ptyxx for
>> 1097 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
>> 1098 has a number of problems. The GNU C library glibc 2.1 and later,
>> 1099 however, supports the Unix98 naming standard: in order to acquire a
>> 1100 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
>> 1101 terminal is then made available to the process and the pseudo
>> 1102 terminal slave can be accessed as /dev/pts/<number>. What was
>> 1103 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
>> 1104
>> 1105 The entries in /dev/pts/ are created on the fly by a virtual
>> 1106 file system; therefore, if you say Y here you should say Y to
>> 1107 "/dev/pts file system for Unix98 PTYs" as well.
>> 1108
>> 1109 If you want to say Y here, you need to have the C library glibc 2.1
>> 1110 or later (equal to libc-6.1, check with "ls -l /lib/libc.so.*").
>> 1111 Read the instructions in <file:Documentation/Changes> pertaining to
>> 1112 pseudo terminals. It's safe to say N.
>> 1113
>> 1114 config UNIX98_PTY_COUNT
>> 1115 int "Maximum number of Unix98 PTYs in use (0-2048)"
>> 1116 depends on UNIX98_PTYS
>> 1117 default "256"
>> 1118 help
>> 1119 The maximum number of Unix98 PTYs that can be used at any one time.
>> 1120 The default is 256, and should be enough for desktop systems. Server
>> 1121 machines which support incoming telnet/rlogin/ssh connections and/or
>> 1122 serve several X terminals may want to increase this: every incoming
>> 1123 connection and every xterm uses up one PTY.
702 1124
703 config ARCH_SUPPORTS_UPROBES !! 1125 When not in use, each additional set of 256 PTYs occupy
704 def_bool y !! 1126 approximately 8 KB of kernel memory on 32-bit architectures.
705 1127
706 config KASAN_SHADOW_OFFSET !! 1128 endmenu
707 hex <<
708 default 0x0 <<
709 depends on KASAN <<
710 1129
711 menu "Power management options" !! 1130 source "sound/Kconfig"
712 1131
713 config ARCH_SUSPEND_POSSIBLE !! 1132 source "fs/Kconfig"
714 def_bool y <<
715 1133
716 config ARCH_HIBERNATION_POSSIBLE !! 1134 source "drivers/video/Kconfig"
717 def_bool y <<
718 1135
719 source "kernel/power/Kconfig" !! 1136 menu "Kernel hacking"
720 source "drivers/acpi/Kconfig" <<
721 source "drivers/cpufreq/Kconfig" <<
722 1137
>> 1138 config DEBUG_KERNEL
>> 1139 bool "Kernel debugging"
>> 1140
>> 1141 config MAGIC_SYSRQ
>> 1142 bool "Magic SysRq key"
>> 1143 depends on DEBUG_KERNEL
>> 1144 help
>> 1145 If you say Y here, you will have some control over the system even
>> 1146 if the system crashes for example during kernel debugging (e.g., you
>> 1147 will be able to flush the buffer cache to disk, reboot the system
>> 1148 immediately or dump some status information). This is accomplished
>> 1149 by pressing various keys while holding SysRq (Alt+PrintScreen). It
>> 1150 also works on a serial console (on PC hardware at least), if you
>> 1151 send a BREAK and then within 5 seconds a command keypress. The
>> 1152 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
>> 1153 unless you really know what this hack does.
>> 1154
>> 1155 config DEBUG_SLAB
>> 1156 bool "Debug memory allocations"
>> 1157 depends on DEBUG_KERNEL
>> 1158
>> 1159 config DEBUG_BUGVERBOSE
>> 1160 bool "Verbose BUG() reporting"
>> 1161 depends on DEBUG_KERNEL
>> 1162
>> 1163 config DEBUG_INFO
>> 1164 bool "Compile the kernel with debug info"
>> 1165 depends on DEBUG_KERNEL
>> 1166 help
>> 1167 If you say Y here the resulting kernel image will include
>> 1168 debugging info resulting in a larger kernel image.
>> 1169 Say Y here only if you plan to use gdb to debug the kernel.
>> 1170 If you don't debug the kernel, you can say N.
>> 1171
723 endmenu 1172 endmenu
724 1173
725 source "arch/loongarch/kvm/Kconfig" !! 1174 source "security/Kconfig"
>> 1175
>> 1176 source "crypto/Kconfig"
>> 1177
>> 1178 source "lib/Kconfig"
>> 1179
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