Commit | Line | Data |
---|---|---|
daa93fab SR |
1 | # Select 32 or 64 bit |
2 | config 64BIT | |
6840999b SR |
3 | bool "64-bit kernel" if ARCH = "x86" |
4 | default ARCH = "x86_64" | |
8f9ca475 | 5 | ---help--- |
daa93fab SR |
6 | Say yes to build a 64-bit kernel - formerly known as x86_64 |
7 | Say no to build a 32-bit kernel - formerly known as i386 | |
8 | ||
9 | config X86_32 | |
3120e25e JB |
10 | def_bool y |
11 | depends on !64BIT | |
82491451 | 12 | select CLKSRC_I8253 |
af1839eb | 13 | select HAVE_UID16 |
daa93fab SR |
14 | |
15 | config X86_64 | |
3120e25e JB |
16 | def_bool y |
17 | depends on 64BIT | |
4692d77f | 18 | select X86_DEV_DMA_OPS |
1032c0ba SR |
19 | |
20 | ### Arch settings | |
8d5fffb9 | 21 | config X86 |
3c2362e6 | 22 | def_bool y |
e17c6d56 | 23 | select HAVE_AOUT if X86_32 |
a5574cf6 | 24 | select HAVE_UNSTABLE_SCHED_CLOCK |
cbee9f88 PZ |
25 | select ARCH_SUPPORTS_NUMA_BALANCING |
26 | select ARCH_WANTS_PROT_NUMA_PROT_NONE | |
ec7748b5 | 27 | select HAVE_IDE |
42d4b839 | 28 | select HAVE_OPROFILE |
8761f1ab | 29 | select HAVE_PCSPKR_PLATFORM |
cc2067a5 | 30 | select HAVE_PERF_EVENTS |
e360adbe | 31 | select HAVE_IRQ_WORK |
28b2ee20 | 32 | select HAVE_IOREMAP_PROT |
3f550096 | 33 | select HAVE_KPROBES |
72d7c3b3 | 34 | select HAVE_MEMBLOCK |
0608f70c | 35 | select HAVE_MEMBLOCK_NODE_MAP |
c378ddd5 | 36 | select ARCH_DISCARD_MEMBLOCK |
1f972768 | 37 | select ARCH_WANT_OPTIONAL_GPIOLIB |
da4276b8 | 38 | select ARCH_WANT_FRAME_POINTERS |
7c095e46 | 39 | select HAVE_DMA_ATTRS |
0a2b9a6e | 40 | select HAVE_DMA_CONTIGUOUS if !SWIOTLB |
9edddaa2 | 41 | select HAVE_KRETPROBES |
c0f7ac3a | 42 | select HAVE_OPTPROBES |
e4b2b886 | 43 | select HAVE_FTRACE_MCOUNT_RECORD |
d57c5d51 | 44 | select HAVE_FENTRY if X86_64 |
cf4db259 | 45 | select HAVE_C_RECORDMCOUNT |
677aa9f7 | 46 | select HAVE_DYNAMIC_FTRACE |
606576ce | 47 | select HAVE_FUNCTION_TRACER |
48d68b20 | 48 | select HAVE_FUNCTION_GRAPH_TRACER |
71e308a2 | 49 | select HAVE_FUNCTION_GRAPH_FP_TEST |
60a7ecf4 | 50 | select HAVE_FUNCTION_TRACE_MCOUNT_TEST |
66700001 | 51 | select HAVE_SYSCALL_TRACEPOINTS |
7ac57a89 | 52 | select SYSCTL_EXCEPTION_TRACE |
e0ec9483 | 53 | select HAVE_KVM |
49793b03 | 54 | select HAVE_ARCH_KGDB |
99bbc4b1 | 55 | select HAVE_ARCH_TRACEHOOK |
323ec001 | 56 | select HAVE_GENERIC_DMA_COHERENT if X86_32 |
58340a07 | 57 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
8d26487f | 58 | select USER_STACKTRACE_SUPPORT |
f850c30c | 59 | select HAVE_REGS_AND_STACK_ACCESS_API |
2118d0c5 | 60 | select HAVE_DMA_API_DEBUG |
2e9f3bdd PA |
61 | select HAVE_KERNEL_GZIP |
62 | select HAVE_KERNEL_BZIP2 | |
63 | select HAVE_KERNEL_LZMA | |
30314804 | 64 | select HAVE_KERNEL_XZ |
13510997 | 65 | select HAVE_KERNEL_LZO |
0067f129 | 66 | select HAVE_HW_BREAKPOINT |
0102752e | 67 | select HAVE_MIXED_BREAKPOINTS_REGS |
99e8c5a3 | 68 | select PERF_EVENTS |
c01d4323 | 69 | select HAVE_PERF_EVENTS_NMI |
c5e63197 | 70 | select HAVE_PERF_REGS |
c5ebcedb | 71 | select HAVE_PERF_USER_STACK_DUMP |
b69ec42b | 72 | select HAVE_DEBUG_KMEMLEAK |
99e8c5a3 | 73 | select ANON_INODES |
eb068e78 PA |
74 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
75 | select HAVE_CMPXCHG_LOCAL | |
2565409f | 76 | select HAVE_CMPXCHG_DOUBLE |
0a4af3b0 | 77 | select HAVE_ARCH_KMEMCHECK |
7c68af6e | 78 | select HAVE_USER_RETURN_NOTIFIER |
e39f5602 | 79 | select ARCH_BINFMT_ELF_RANDOMIZE_PIE |
46eb3b64 | 80 | select HAVE_ARCH_JUMP_LABEL |
3cba11d3 | 81 | select HAVE_TEXT_POKE_SMP |
3bb9808e | 82 | select HAVE_GENERIC_HARDIRQS |
7463449b | 83 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
141d55e6 | 84 | select SPARSE_IRQ |
c49aa5bd | 85 | select GENERIC_FIND_FIRST_BIT |
3bb9808e TG |
86 | select GENERIC_IRQ_PROBE |
87 | select GENERIC_PENDING_IRQ if SMP | |
517e4981 | 88 | select GENERIC_IRQ_SHOW |
d1748302 | 89 | select GENERIC_CLOCKEVENTS_MIN_ADJUST |
c0185808 | 90 | select IRQ_FORCED_THREADING |
351f8f8e | 91 | select USE_GENERIC_SMP_HELPERS if SMP |
e47b65b0 | 92 | select HAVE_BPF_JIT if X86_64 |
15626062 | 93 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
0a779c57 | 94 | select CLKEVT_I8253 |
df013ffb | 95 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
4673ca8e | 96 | select GENERIC_IOMAP |
e419b4cc | 97 | select DCACHE_WORD_ACCESS |
7eb43a6d | 98 | select GENERIC_SMP_IDLE_THREAD |
c1d7e01d | 99 | select ARCH_WANT_IPC_PARSE_VERSION if X86_32 |
c6cfbeb4 | 100 | select HAVE_ARCH_SECCOMP_FILTER |
8b5ad472 | 101 | select BUILDTIME_EXTABLE_SORT |
bdebaf80 TG |
102 | select GENERIC_CMOS_UPDATE |
103 | select CLOCKSOURCE_WATCHDOG | |
104 | select GENERIC_CLOCKEVENTS | |
105 | select ARCH_CLOCKSOURCE_DATA if X86_64 | |
106 | select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC) | |
107 | select GENERIC_TIME_VSYSCALL if X86_64 | |
108 | select KTIME_SCALAR if X86_32 | |
4ae73f2d | 109 | select GENERIC_STRNCPY_FROM_USER |
5723aa99 | 110 | select GENERIC_STRNLEN_USER |
91d1aa43 | 111 | select HAVE_CONTEXT_TRACKING if X86_64 |
fdf9c356 | 112 | select HAVE_IRQ_TIME_ACCOUNTING |
786d35d4 DH |
113 | select MODULES_USE_ELF_REL if X86_32 |
114 | select MODULES_USE_ELF_RELA if X86_64 | |
1d4b4b29 | 115 | select CLONE_BACKWARDS if X86_32 |
6bf9adfc | 116 | select GENERIC_SIGALTSTACK |
7d8330a5 | 117 | |
ba7e4d13 | 118 | config INSTRUCTION_DECODER |
3120e25e JB |
119 | def_bool y |
120 | depends on KPROBES || PERF_EVENTS || UPROBES | |
ba7e4d13 | 121 | |
51b26ada LT |
122 | config OUTPUT_FORMAT |
123 | string | |
124 | default "elf32-i386" if X86_32 | |
125 | default "elf64-x86-64" if X86_64 | |
126 | ||
73531905 | 127 | config ARCH_DEFCONFIG |
b9b39bfb | 128 | string |
73531905 SR |
129 | default "arch/x86/configs/i386_defconfig" if X86_32 |
130 | default "arch/x86/configs/x86_64_defconfig" if X86_64 | |
b9b39bfb | 131 | |
8d5fffb9 | 132 | config LOCKDEP_SUPPORT |
3c2362e6 | 133 | def_bool y |
8d5fffb9 SR |
134 | |
135 | config STACKTRACE_SUPPORT | |
3c2362e6 | 136 | def_bool y |
8d5fffb9 | 137 | |
aa7d9350 HC |
138 | config HAVE_LATENCYTOP_SUPPORT |
139 | def_bool y | |
140 | ||
8d5fffb9 | 141 | config MMU |
3c2362e6 | 142 | def_bool y |
8d5fffb9 | 143 | |
8d5fffb9 SR |
144 | config SBUS |
145 | bool | |
146 | ||
3bc4e459 | 147 | config NEED_DMA_MAP_STATE |
3120e25e JB |
148 | def_bool y |
149 | depends on X86_64 || INTEL_IOMMU || DMA_API_DEBUG | |
3bc4e459 | 150 | |
18e98307 | 151 | config NEED_SG_DMA_LENGTH |
4a14d84e | 152 | def_bool y |
18e98307 | 153 | |
8d5fffb9 | 154 | config GENERIC_ISA_DMA |
3120e25e JB |
155 | def_bool y |
156 | depends on ISA_DMA_API | |
8d5fffb9 | 157 | |
8d5fffb9 | 158 | config GENERIC_BUG |
3c2362e6 | 159 | def_bool y |
8d5fffb9 | 160 | depends on BUG |
b93a531e JB |
161 | select GENERIC_BUG_RELATIVE_POINTERS if X86_64 |
162 | ||
163 | config GENERIC_BUG_RELATIVE_POINTERS | |
164 | bool | |
8d5fffb9 SR |
165 | |
166 | config GENERIC_HWEIGHT | |
3c2362e6 | 167 | def_bool y |
8d5fffb9 | 168 | |
a6082959 | 169 | config GENERIC_GPIO |
9ba16087 | 170 | bool |
a6082959 | 171 | |
8d5fffb9 | 172 | config ARCH_MAY_HAVE_PC_FDC |
3120e25e JB |
173 | def_bool y |
174 | depends on ISA_DMA_API | |
8d5fffb9 | 175 | |
1032c0ba | 176 | config RWSEM_XCHGADD_ALGORITHM |
3120e25e | 177 | def_bool y |
1032c0ba | 178 | |
1032c0ba SR |
179 | config GENERIC_CALIBRATE_DELAY |
180 | def_bool y | |
181 | ||
9a0b8415 | 182 | config ARCH_HAS_CPU_RELAX |
183 | def_bool y | |
184 | ||
89cedfef VP |
185 | config ARCH_HAS_DEFAULT_IDLE |
186 | def_bool y | |
187 | ||
1b27d05b PE |
188 | config ARCH_HAS_CACHE_LINE_SIZE |
189 | def_bool y | |
190 | ||
fad12ac8 TR |
191 | config ARCH_HAS_CPU_AUTOPROBE |
192 | def_bool y | |
193 | ||
dd5af90a | 194 | config HAVE_SETUP_PER_CPU_AREA |
89c9c4c5 | 195 | def_bool y |
b32ef636 | 196 | |
08fc4580 TH |
197 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
198 | def_bool y | |
199 | ||
200 | config NEED_PER_CPU_PAGE_FIRST_CHUNK | |
11124411 TH |
201 | def_bool y |
202 | ||
801e4062 JB |
203 | config ARCH_HIBERNATION_POSSIBLE |
204 | def_bool y | |
801e4062 | 205 | |
f4cb5700 JB |
206 | config ARCH_SUSPEND_POSSIBLE |
207 | def_bool y | |
f4cb5700 | 208 | |
8d5fffb9 SR |
209 | config ZONE_DMA32 |
210 | bool | |
211 | default X86_64 | |
212 | ||
8d5fffb9 SR |
213 | config AUDIT_ARCH |
214 | bool | |
215 | default X86_64 | |
216 | ||
765c68bd IM |
217 | config ARCH_SUPPORTS_OPTIMIZED_INLINING |
218 | def_bool y | |
219 | ||
6a11f75b AM |
220 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
221 | def_bool y | |
222 | ||
69575d38 SW |
223 | config HAVE_INTEL_TXT |
224 | def_bool y | |
d3f13810 | 225 | depends on EXPERIMENTAL && INTEL_IOMMU && ACPI |
69575d38 | 226 | |
6b0c3d44 SR |
227 | config X86_32_SMP |
228 | def_bool y | |
229 | depends on X86_32 && SMP | |
230 | ||
231 | config X86_64_SMP | |
232 | def_bool y | |
233 | depends on X86_64 && SMP | |
234 | ||
8d5fffb9 | 235 | config X86_HT |
6fc108a0 | 236 | def_bool y |
ee0011a7 | 237 | depends on SMP |
8d5fffb9 | 238 | |
ccbeed3a TH |
239 | config X86_32_LAZY_GS |
240 | def_bool y | |
60a5317f | 241 | depends on X86_32 && !CC_STACKPROTECTOR |
ccbeed3a | 242 | |
d61931d8 BP |
243 | config ARCH_HWEIGHT_CFLAGS |
244 | string | |
245 | default "-fcall-saved-ecx -fcall-saved-edx" if X86_32 | |
246 | default "-fcall-saved-rdi -fcall-saved-rsi -fcall-saved-rdx -fcall-saved-rcx -fcall-saved-r8 -fcall-saved-r9 -fcall-saved-r10 -fcall-saved-r11" if X86_64 | |
247 | ||
d7c53c9e BP |
248 | config ARCH_CPU_PROBE_RELEASE |
249 | def_bool y | |
250 | depends on HOTPLUG_CPU | |
251 | ||
2b144498 SD |
252 | config ARCH_SUPPORTS_UPROBES |
253 | def_bool y | |
254 | ||
506f1d07 | 255 | source "init/Kconfig" |
dc52ddc0 | 256 | source "kernel/Kconfig.freezer" |
8d5fffb9 | 257 | |
506f1d07 SR |
258 | menu "Processor type and features" |
259 | ||
5ee71535 RD |
260 | config ZONE_DMA |
261 | bool "DMA memory allocation support" if EXPERT | |
262 | default y | |
263 | help | |
264 | DMA memory allocation support allows devices with less than 32-bit | |
265 | addressing to allocate within the first 16MB of address space. | |
266 | Disable if no such devices will be used. | |
267 | ||
268 | If unsure, say Y. | |
269 | ||
506f1d07 SR |
270 | config SMP |
271 | bool "Symmetric multi-processing support" | |
272 | ---help--- | |
273 | This enables support for systems with more than one CPU. If you have | |
274 | a system with only one CPU, like most personal computers, say N. If | |
275 | you have a system with more than one CPU, say Y. | |
276 | ||
277 | If you say N here, the kernel will run on single and multiprocessor | |
278 | machines, but will use only one CPU of a multiprocessor machine. If | |
279 | you say Y here, the kernel will run on many, but not all, | |
280 | singleprocessor machines. On a singleprocessor machine, the kernel | |
281 | will run faster if you say N here. | |
282 | ||
283 | Note that if you say Y here and choose architecture "586" or | |
284 | "Pentium" under "Processor family", the kernel will not work on 486 | |
285 | architectures. Similarly, multiprocessor kernels for the "PPro" | |
286 | architecture may not work on all Pentium based boards. | |
287 | ||
288 | People using multiprocessor machines who say Y here should also say | |
289 | Y to "Enhanced Real Time Clock Support", below. The "Advanced Power | |
290 | Management" code will be disabled if you say Y here. | |
291 | ||
395cf969 | 292 | See also <file:Documentation/x86/i386/IO-APIC.txt>, |
506f1d07 SR |
293 | <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at |
294 | <http://www.tldp.org/docs.html#howto>. | |
295 | ||
296 | If you don't know what to do here, say N. | |
297 | ||
06cd9a7d YL |
298 | config X86_X2APIC |
299 | bool "Support x2apic" | |
d3f13810 | 300 | depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP |
06cd9a7d YL |
301 | ---help--- |
302 | This enables x2apic support on CPUs that have this feature. | |
303 | ||
304 | This allows 32-bit apic IDs (so it can support very large systems), | |
305 | and accesses the local apic via MSRs not via mmio. | |
306 | ||
06cd9a7d YL |
307 | If you don't know what to do here, say N. |
308 | ||
6695c85b | 309 | config X86_MPPARSE |
6e87f9b7 | 310 | bool "Enable MPS table" if ACPI || SFI |
7a527688 | 311 | default y |
5ab74722 | 312 | depends on X86_LOCAL_APIC |
8f9ca475 | 313 | ---help--- |
6695c85b YL |
314 | For old smp systems that do not have proper acpi support. Newer systems |
315 | (esp with 64bit cpus) with acpi support, MADT and DSDT will override it | |
6695c85b | 316 | |
26f7ef14 YL |
317 | config X86_BIGSMP |
318 | bool "Support for big SMP systems with more than 8 CPUs" | |
319 | depends on X86_32 && SMP | |
8f9ca475 | 320 | ---help--- |
26f7ef14 | 321 | This option is needed for the systems that have more than 8 CPUs |
506f1d07 | 322 | |
8425091f | 323 | if X86_32 |
c5c606d9 RT |
324 | config X86_EXTENDED_PLATFORM |
325 | bool "Support for extended (non-PC) x86 platforms" | |
326 | default y | |
8f9ca475 | 327 | ---help--- |
06ac8346 IM |
328 | If you disable this option then the kernel will only support |
329 | standard PC platforms. (which covers the vast majority of | |
330 | systems out there.) | |
331 | ||
8425091f RT |
332 | If you enable this option then you'll be able to select support |
333 | for the following (non-PC) 32 bit x86 platforms: | |
334 | AMD Elan | |
335 | NUMAQ (IBM/Sequent) | |
336 | RDC R-321x SoC | |
337 | SGI 320/540 (Visual Workstation) | |
83125a3a | 338 | STA2X11-based (e.g. Northville) |
8425091f RT |
339 | Summit/EXA (IBM x440) |
340 | Unisys ES7000 IA32 series | |
3f4110a4 | 341 | Moorestown MID devices |
06ac8346 IM |
342 | |
343 | If you have one of these systems, or if you want to build a | |
344 | generic distribution kernel, say Y here - otherwise say N. | |
8425091f | 345 | endif |
06ac8346 | 346 | |
8425091f RT |
347 | if X86_64 |
348 | config X86_EXTENDED_PLATFORM | |
349 | bool "Support for extended (non-PC) x86 platforms" | |
350 | default y | |
351 | ---help--- | |
352 | If you disable this option then the kernel will only support | |
353 | standard PC platforms. (which covers the vast majority of | |
354 | systems out there.) | |
355 | ||
356 | If you enable this option then you'll be able to select support | |
357 | for the following (non-PC) 64 bit x86 platforms: | |
44b111b5 | 358 | Numascale NumaChip |
8425091f RT |
359 | ScaleMP vSMP |
360 | SGI Ultraviolet | |
361 | ||
362 | If you have one of these systems, or if you want to build a | |
363 | generic distribution kernel, say Y here - otherwise say N. | |
364 | endif | |
c5c606d9 RT |
365 | # This is an alphabetically sorted list of 64 bit extended platforms |
366 | # Please maintain the alphabetic order if and when there are additions | |
44b111b5 SP |
367 | config X86_NUMACHIP |
368 | bool "Numascale NumaChip" | |
369 | depends on X86_64 | |
370 | depends on X86_EXTENDED_PLATFORM | |
371 | depends on NUMA | |
372 | depends on SMP | |
373 | depends on X86_X2APIC | |
f9726bfd | 374 | depends on PCI_MMCONFIG |
44b111b5 SP |
375 | ---help--- |
376 | Adds support for Numascale NumaChip large-SMP systems. Needed to | |
377 | enable more than ~168 cores. | |
378 | If you don't have one of these, you should say N here. | |
506f1d07 | 379 | |
c5c606d9 RT |
380 | config X86_VSMP |
381 | bool "ScaleMP vSMP" | |
03f1a17c | 382 | select PARAVIRT_GUEST |
c5c606d9 RT |
383 | select PARAVIRT |
384 | depends on X86_64 && PCI | |
385 | depends on X86_EXTENDED_PLATFORM | |
ead91d4b | 386 | depends on SMP |
8f9ca475 | 387 | ---help--- |
c5c606d9 RT |
388 | Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is |
389 | supposed to run on these EM64T-based machines. Only choose this option | |
390 | if you have one of these machines. | |
5e3a77e9 | 391 | |
03b48632 NP |
392 | config X86_UV |
393 | bool "SGI Ultraviolet" | |
394 | depends on X86_64 | |
c5c606d9 | 395 | depends on X86_EXTENDED_PLATFORM |
54c28d29 | 396 | depends on NUMA |
9d6c26e7 | 397 | depends on X86_X2APIC |
8f9ca475 | 398 | ---help--- |
03b48632 NP |
399 | This option is needed in order to support SGI Ultraviolet systems. |
400 | If you don't have one of these, you should say N here. | |
401 | ||
c5c606d9 RT |
402 | # Following is an alphabetically sorted list of 32 bit extended platforms |
403 | # Please maintain the alphabetic order if and when there are additions | |
506f1d07 | 404 | |
c751e17b TG |
405 | config X86_INTEL_CE |
406 | bool "CE4100 TV platform" | |
407 | depends on PCI | |
408 | depends on PCI_GODIRECT | |
409 | depends on X86_32 | |
410 | depends on X86_EXTENDED_PLATFORM | |
37bc9f50 | 411 | select X86_REBOOTFIXUPS |
da6b737b SAS |
412 | select OF |
413 | select OF_EARLY_FLATTREE | |
b4e51854 | 414 | select IRQ_DOMAIN |
c751e17b TG |
415 | ---help--- |
416 | Select for the Intel CE media processor (CE4100) SOC. | |
417 | This option compiles in support for the CE4100 SOC for settop | |
418 | boxes and media devices. | |
419 | ||
dd137525 | 420 | config X86_WANT_INTEL_MID |
43605ef1 AC |
421 | bool "Intel MID platform support" |
422 | depends on X86_32 | |
423 | depends on X86_EXTENDED_PLATFORM | |
424 | ---help--- | |
425 | Select to build a kernel capable of supporting Intel MID platform | |
426 | systems which do not have the PCI legacy interfaces (Moorestown, | |
427 | Medfield). If you are building for a PC class system say N here. | |
428 | ||
dd137525 | 429 | if X86_WANT_INTEL_MID |
43605ef1 | 430 | |
4e2b1c4f AC |
431 | config X86_INTEL_MID |
432 | bool | |
433 | ||
1ea7c673 AC |
434 | config X86_MDFLD |
435 | bool "Medfield MID platform" | |
436 | depends on PCI | |
437 | depends on PCI_GOANY | |
438 | depends on X86_IO_APIC | |
7c9c3a1e AC |
439 | select X86_INTEL_MID |
440 | select SFI | |
441 | select DW_APB_TIMER | |
1ea7c673 AC |
442 | select APB_TIMER |
443 | select I2C | |
444 | select SPI | |
445 | select INTEL_SCU_IPC | |
446 | select X86_PLATFORM_DEVICES | |
15a713df | 447 | select MFD_INTEL_MSIC |
1ea7c673 AC |
448 | ---help--- |
449 | Medfield is Intel's Low Power Intel Architecture (LPIA) based Moblin | |
450 | Internet Device(MID) platform. | |
451 | Unlike standard x86 PCs, Medfield does not have many legacy devices | |
452 | nor standard legacy replacement devices/features. e.g. Medfield does | |
453 | not contain i8259, i8254, HPET, legacy BIOS, most of the io ports. | |
454 | ||
43605ef1 AC |
455 | endif |
456 | ||
c5c606d9 RT |
457 | config X86_RDC321X |
458 | bool "RDC R-321x SoC" | |
506f1d07 | 459 | depends on X86_32 |
c5c606d9 RT |
460 | depends on X86_EXTENDED_PLATFORM |
461 | select M486 | |
462 | select X86_REBOOTFIXUPS | |
463 | ---help--- | |
464 | This option is needed for RDC R-321x system-on-chip, also known | |
465 | as R-8610-(G). | |
466 | If you don't have one of these chips, you should say N here. | |
467 | ||
e0c7ae37 | 468 | config X86_32_NON_STANDARD |
9c398017 IM |
469 | bool "Support non-standard 32-bit SMP architectures" |
470 | depends on X86_32 && SMP | |
c5c606d9 | 471 | depends on X86_EXTENDED_PLATFORM |
8f9ca475 | 472 | ---help--- |
83125a3a AR |
473 | This option compiles in the NUMAQ, Summit, bigsmp, ES7000, |
474 | STA2X11, default subarchitectures. It is intended for a generic | |
475 | binary kernel. If you select them all, kernel will probe it | |
476 | one by one and will fallback to default. | |
d49c4288 | 477 | |
c5c606d9 | 478 | # Alphabetically sorted list of Non standard 32 bit platforms |
d49c4288 | 479 | |
506f1d07 SR |
480 | config X86_NUMAQ |
481 | bool "NUMAQ (IBM/Sequent)" | |
e0c7ae37 | 482 | depends on X86_32_NON_STANDARD |
a92d152e | 483 | depends on PCI |
506f1d07 | 484 | select NUMA |
9c398017 | 485 | select X86_MPPARSE |
8f9ca475 | 486 | ---help--- |
d49c4288 YL |
487 | This option is used for getting Linux to run on a NUMAQ (IBM/Sequent) |
488 | NUMA multiquad box. This changes the way that processors are | |
489 | bootstrapped, and uses Clustered Logical APIC addressing mode instead | |
490 | of Flat Logical. You will need a new lynxer.elf file to flash your | |
491 | firmware with - send email to <Martin.Bligh@us.ibm.com>. | |
506f1d07 | 492 | |
d949f36f | 493 | config X86_SUPPORTS_MEMORY_FAILURE |
6fc108a0 | 494 | def_bool y |
d949f36f LT |
495 | # MCE code calls memory_failure(): |
496 | depends on X86_MCE | |
497 | # On 32-bit this adds too big of NODES_SHIFT and we run out of page flags: | |
498 | depends on !X86_NUMAQ | |
499 | # On 32-bit SPARSEMEM adds too big of SECTIONS_WIDTH: | |
500 | depends on X86_64 || !SPARSEMEM | |
501 | select ARCH_SUPPORTS_MEMORY_FAILURE | |
d949f36f | 502 | |
1b84e1c8 IM |
503 | config X86_VISWS |
504 | bool "SGI 320/540 (Visual Workstation)" | |
c5c606d9 RT |
505 | depends on X86_32 && PCI && X86_MPPARSE && PCI_GODIRECT |
506 | depends on X86_32_NON_STANDARD | |
507 | ---help--- | |
1b84e1c8 IM |
508 | The SGI Visual Workstation series is an IA32-based workstation |
509 | based on SGI systems chips with some legacy PC hardware attached. | |
510 | ||
511 | Say Y here to create a kernel to run on the SGI 320 or 540. | |
512 | ||
513 | A kernel compiled for the Visual Workstation will run on general | |
514 | PCs as well. See <file:Documentation/sgi-visws.txt> for details. | |
515 | ||
83125a3a AR |
516 | config STA2X11 |
517 | bool "STA2X11 Companion Chip Support" | |
518 | depends on X86_32_NON_STANDARD && PCI | |
519 | select X86_DEV_DMA_OPS | |
520 | select X86_DMA_REMAP | |
521 | select SWIOTLB | |
522 | select MFD_STA2X11 | |
523 | select ARCH_REQUIRE_GPIOLIB | |
524 | default n | |
525 | ---help--- | |
526 | This adds support for boards based on the STA2X11 IO-Hub, | |
527 | a.k.a. "ConneXt". The chip is used in place of the standard | |
528 | PC chipset, so all "standard" peripherals are missing. If this | |
529 | option is selected the kernel will still be able to boot on | |
530 | standard PC machines. | |
531 | ||
9c398017 IM |
532 | config X86_SUMMIT |
533 | bool "Summit/EXA (IBM x440)" | |
e0c7ae37 | 534 | depends on X86_32_NON_STANDARD |
8f9ca475 | 535 | ---help--- |
9c398017 IM |
536 | This option is needed for IBM systems that use the Summit/EXA chipset. |
537 | In particular, it is needed for the x440. | |
1f972768 | 538 | |
9c398017 | 539 | config X86_ES7000 |
c5c606d9 | 540 | bool "Unisys ES7000 IA32 series" |
26f7ef14 | 541 | depends on X86_32_NON_STANDARD && X86_BIGSMP |
8f9ca475 | 542 | ---help--- |
9c398017 IM |
543 | Support for Unisys ES7000 systems. Say 'Y' here if this kernel is |
544 | supposed to run on an IA32-based Unisys ES7000 system. | |
545 | ||
82148d1d S |
546 | config X86_32_IRIS |
547 | tristate "Eurobraille/Iris poweroff module" | |
548 | depends on X86_32 | |
549 | ---help--- | |
550 | The Iris machines from EuroBraille do not have APM or ACPI support | |
551 | to shut themselves down properly. A special I/O sequence is | |
552 | needed to do so, which is what this module does at | |
553 | kernel shutdown. | |
554 | ||
555 | This is only for Iris machines from EuroBraille. | |
556 | ||
557 | If unused, say N. | |
558 | ||
ae1e9130 | 559 | config SCHED_OMIT_FRAME_POINTER |
3c2362e6 HH |
560 | def_bool y |
561 | prompt "Single-depth WCHAN output" | |
a87d0914 | 562 | depends on X86 |
8f9ca475 | 563 | ---help--- |
506f1d07 SR |
564 | Calculate simpler /proc/<PID>/wchan values. If this option |
565 | is disabled then wchan values will recurse back to the | |
566 | caller function. This provides more accurate wchan values, | |
567 | at the expense of slightly more scheduling overhead. | |
568 | ||
569 | If in doubt, say "Y". | |
570 | ||
506f1d07 SR |
571 | menuconfig PARAVIRT_GUEST |
572 | bool "Paravirtualized guest support" | |
8f9ca475 | 573 | ---help--- |
506f1d07 SR |
574 | Say Y here to get to see options related to running Linux under |
575 | various hypervisors. This option alone does not add any kernel code. | |
576 | ||
577 | If you say N, all options in this submenu will be skipped and disabled. | |
578 | ||
579 | if PARAVIRT_GUEST | |
580 | ||
095c0aa8 GC |
581 | config PARAVIRT_TIME_ACCOUNTING |
582 | bool "Paravirtual steal time accounting" | |
583 | select PARAVIRT | |
584 | default n | |
585 | ---help--- | |
586 | Select this option to enable fine granularity task steal time | |
587 | accounting. Time spent executing other tasks in parallel with | |
588 | the current vCPU is discounted from the vCPU power. To account for | |
589 | that, there can be a small performance impact. | |
590 | ||
591 | If in doubt, say N here. | |
592 | ||
506f1d07 SR |
593 | source "arch/x86/xen/Kconfig" |
594 | ||
0cf1bfd2 | 595 | config KVM_GUEST |
90993cdd MT |
596 | bool "KVM Guest support (including kvmclock)" |
597 | select PARAVIRT | |
0cf1bfd2 | 598 | select PARAVIRT |
90993cdd MT |
599 | select PARAVIRT_CLOCK |
600 | default y if PARAVIRT_GUEST | |
8f9ca475 IM |
601 | ---help--- |
602 | This option enables various optimizations for running under the KVM | |
90993cdd MT |
603 | hypervisor. It includes a paravirtualized clock, so that instead |
604 | of relying on a PIT (or probably other) emulation by the | |
605 | underlying device model, the host provides the guest with | |
606 | timing infrastructure such as time of day, and system time | |
0cf1bfd2 | 607 | |
506f1d07 SR |
608 | source "arch/x86/lguest/Kconfig" |
609 | ||
e61bd94a EPH |
610 | config PARAVIRT |
611 | bool "Enable paravirtualization code" | |
8f9ca475 | 612 | ---help--- |
e61bd94a EPH |
613 | This changes the kernel so it can modify itself when it is run |
614 | under a hypervisor, potentially improving performance significantly | |
615 | over full virtualization. However, when run without a hypervisor | |
616 | the kernel is theoretically slower and slightly larger. | |
617 | ||
b4ecc126 JF |
618 | config PARAVIRT_SPINLOCKS |
619 | bool "Paravirtualization layer for spinlocks" | |
620 | depends on PARAVIRT && SMP && EXPERIMENTAL | |
621 | ---help--- | |
622 | Paravirtualized spinlocks allow a pvops backend to replace the | |
623 | spinlock implementation with something virtualization-friendly | |
624 | (for example, block the virtual CPU rather than spinning). | |
625 | ||
626 | Unfortunately the downside is an up to 5% performance hit on | |
627 | native kernels, with various workloads. | |
628 | ||
629 | If you are unsure how to answer this question, answer N. | |
630 | ||
7af192c9 GH |
631 | config PARAVIRT_CLOCK |
632 | bool | |
7af192c9 | 633 | |
506f1d07 SR |
634 | endif |
635 | ||
97349135 | 636 | config PARAVIRT_DEBUG |
8f9ca475 IM |
637 | bool "paravirt-ops debugging" |
638 | depends on PARAVIRT && DEBUG_KERNEL | |
639 | ---help--- | |
640 | Enable to debug paravirt_ops internals. Specifically, BUG if | |
641 | a paravirt_op is missing when it is called. | |
97349135 | 642 | |
08677214 | 643 | config NO_BOOTMEM |
774ea0bc | 644 | def_bool y |
08677214 | 645 | |
03273184 YL |
646 | config MEMTEST |
647 | bool "Memtest" | |
8f9ca475 | 648 | ---help--- |
c64df707 | 649 | This option adds a kernel parameter 'memtest', which allows memtest |
03273184 | 650 | to be set. |
8f9ca475 IM |
651 | memtest=0, mean disabled; -- default |
652 | memtest=1, mean do 1 test pattern; | |
653 | ... | |
654 | memtest=4, mean do 4 test patterns. | |
aba3728c | 655 | If you are unsure how to answer this question, answer N. |
506f1d07 SR |
656 | |
657 | config X86_SUMMIT_NUMA | |
3c2362e6 | 658 | def_bool y |
e0c7ae37 | 659 | depends on X86_32 && NUMA && X86_32_NON_STANDARD |
506f1d07 SR |
660 | |
661 | config X86_CYCLONE_TIMER | |
3c2362e6 | 662 | def_bool y |
f9b15df4 | 663 | depends on X86_SUMMIT |
506f1d07 | 664 | |
506f1d07 SR |
665 | source "arch/x86/Kconfig.cpu" |
666 | ||
667 | config HPET_TIMER | |
3c2362e6 | 668 | def_bool X86_64 |
506f1d07 | 669 | prompt "HPET Timer Support" if X86_32 |
8f9ca475 IM |
670 | ---help--- |
671 | Use the IA-PC HPET (High Precision Event Timer) to manage | |
672 | time in preference to the PIT and RTC, if a HPET is | |
673 | present. | |
674 | HPET is the next generation timer replacing legacy 8254s. | |
675 | The HPET provides a stable time base on SMP | |
676 | systems, unlike the TSC, but it is more expensive to access, | |
677 | as it is off-chip. You can find the HPET spec at | |
678 | <http://www.intel.com/hardwaredesign/hpetspec_1.pdf>. | |
506f1d07 | 679 | |
8f9ca475 IM |
680 | You can safely choose Y here. However, HPET will only be |
681 | activated if the platform and the BIOS support this feature. | |
682 | Otherwise the 8254 will be used for timing services. | |
506f1d07 | 683 | |
8f9ca475 | 684 | Choose N to continue using the legacy 8254 timer. |
506f1d07 SR |
685 | |
686 | config HPET_EMULATE_RTC | |
3c2362e6 | 687 | def_bool y |
9d8af78b | 688 | depends on HPET_TIMER && (RTC=y || RTC=m || RTC_DRV_CMOS=m || RTC_DRV_CMOS=y) |
506f1d07 | 689 | |
bb24c471 | 690 | config APB_TIMER |
933b9463 AC |
691 | def_bool y if X86_INTEL_MID |
692 | prompt "Intel MID APB Timer Support" if X86_INTEL_MID | |
06c3df49 | 693 | select DW_APB_TIMER |
a0c3832a | 694 | depends on X86_INTEL_MID && SFI |
bb24c471 JP |
695 | help |
696 | APB timer is the replacement for 8254, HPET on X86 MID platforms. | |
697 | The APBT provides a stable time base on SMP | |
698 | systems, unlike the TSC, but it is more expensive to access, | |
699 | as it is off-chip. APB timers are always running regardless of CPU | |
700 | C states, they are used as per CPU clockevent device when possible. | |
701 | ||
6a108a14 | 702 | # Mark as expert because too many people got it wrong. |
506f1d07 | 703 | # The code disables itself when not needed. |
7ae9392c TP |
704 | config DMI |
705 | default y | |
6a108a14 | 706 | bool "Enable DMI scanning" if EXPERT |
8f9ca475 | 707 | ---help--- |
7ae9392c TP |
708 | Enabled scanning of DMI to identify machine quirks. Say Y |
709 | here unless you have verified that your setup is not | |
710 | affected by entries in the DMI blacklist. Required by PNP | |
711 | BIOS code. | |
712 | ||
506f1d07 | 713 | config GART_IOMMU |
6a108a14 | 714 | bool "GART IOMMU support" if EXPERT |
506f1d07 SR |
715 | default y |
716 | select SWIOTLB | |
23ac4ae8 | 717 | depends on X86_64 && PCI && AMD_NB |
8f9ca475 | 718 | ---help--- |
506f1d07 SR |
719 | Support for full DMA access of devices with 32bit memory access only |
720 | on systems with more than 3GB. This is usually needed for USB, | |
721 | sound, many IDE/SATA chipsets and some other devices. | |
722 | Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART | |
723 | based hardware IOMMU and a software bounce buffer based IOMMU used | |
724 | on Intel systems and as fallback. | |
725 | The code is only active when needed (enough memory and limited | |
726 | device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified | |
727 | too. | |
728 | ||
729 | config CALGARY_IOMMU | |
730 | bool "IBM Calgary IOMMU support" | |
731 | select SWIOTLB | |
732 | depends on X86_64 && PCI && EXPERIMENTAL | |
8f9ca475 | 733 | ---help--- |
506f1d07 SR |
734 | Support for hardware IOMMUs in IBM's xSeries x366 and x460 |
735 | systems. Needed to run systems with more than 3GB of memory | |
736 | properly with 32-bit PCI devices that do not support DAC | |
737 | (Double Address Cycle). Calgary also supports bus level | |
738 | isolation, where all DMAs pass through the IOMMU. This | |
739 | prevents them from going anywhere except their intended | |
740 | destination. This catches hard-to-find kernel bugs and | |
741 | mis-behaving drivers and devices that do not use the DMA-API | |
742 | properly to set up their DMA buffers. The IOMMU can be | |
743 | turned off at boot time with the iommu=off parameter. | |
744 | Normally the kernel will make the right choice by itself. | |
745 | If unsure, say Y. | |
746 | ||
747 | config CALGARY_IOMMU_ENABLED_BY_DEFAULT | |
3c2362e6 HH |
748 | def_bool y |
749 | prompt "Should Calgary be enabled by default?" | |
506f1d07 | 750 | depends on CALGARY_IOMMU |
8f9ca475 | 751 | ---help--- |
506f1d07 SR |
752 | Should Calgary be enabled by default? if you choose 'y', Calgary |
753 | will be used (if it exists). If you choose 'n', Calgary will not be | |
754 | used even if it exists. If you choose 'n' and would like to use | |
755 | Calgary anyway, pass 'iommu=calgary' on the kernel command line. | |
756 | If unsure, say Y. | |
757 | ||
758 | # need this always selected by IOMMU for the VIA workaround | |
759 | config SWIOTLB | |
a1afd01c | 760 | def_bool y if X86_64 |
8f9ca475 | 761 | ---help--- |
506f1d07 | 762 | Support for software bounce buffers used on x86-64 systems |
4454d327 JM |
763 | which don't have a hardware IOMMU. Using this PCI devices |
764 | which can only access 32-bits of memory can be used on systems | |
765 | with more than 3 GB of memory. | |
766 | If unsure, say Y. | |
506f1d07 | 767 | |
a8522509 | 768 | config IOMMU_HELPER |
3120e25e JB |
769 | def_bool y |
770 | depends on CALGARY_IOMMU || GART_IOMMU || SWIOTLB || AMD_IOMMU | |
d25e26b6 | 771 | |
1184dc2f | 772 | config MAXSMP |
ddb0c5a6 | 773 | bool "Enable Maximum number of SMP Processors and NUMA Nodes" |
36f5101a MT |
774 | depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL |
775 | select CPUMASK_OFFSTACK | |
8f9ca475 | 776 | ---help--- |
ddb0c5a6 | 777 | Enable maximum number of CPUS and NUMA Nodes for this architecture. |
1184dc2f | 778 | If unsure, say N. |
506f1d07 SR |
779 | |
780 | config NR_CPUS | |
36f5101a | 781 | int "Maximum number of CPUs" if SMP && !MAXSMP |
2a3313f4 | 782 | range 2 8 if SMP && X86_32 && !X86_BIGSMP |
36f5101a | 783 | range 2 512 if SMP && !MAXSMP |
78637a97 | 784 | default "1" if !SMP |
d25e26b6 | 785 | default "4096" if MAXSMP |
78637a97 MT |
786 | default "32" if SMP && (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP || X86_ES7000) |
787 | default "8" if SMP | |
8f9ca475 | 788 | ---help--- |
506f1d07 | 789 | This allows you to specify the maximum number of CPUs which this |
d25e26b6 | 790 | kernel will support. The maximum supported value is 512 and the |
506f1d07 SR |
791 | minimum value which makes sense is 2. |
792 | ||
793 | This is purely to save memory - each supported CPU adds | |
794 | approximately eight kilobytes to the kernel image. | |
795 | ||
796 | config SCHED_SMT | |
797 | bool "SMT (Hyperthreading) scheduler support" | |
b089c12b | 798 | depends on X86_HT |
8f9ca475 | 799 | ---help--- |
506f1d07 SR |
800 | SMT scheduler support improves the CPU scheduler's decision making |
801 | when dealing with Intel Pentium 4 chips with HyperThreading at a | |
802 | cost of slightly increased overhead in some places. If unsure say | |
803 | N here. | |
804 | ||
805 | config SCHED_MC | |
3c2362e6 HH |
806 | def_bool y |
807 | prompt "Multi-core scheduler support" | |
b089c12b | 808 | depends on X86_HT |
8f9ca475 | 809 | ---help--- |
506f1d07 SR |
810 | Multi-core scheduler support improves the CPU scheduler's decision |
811 | making when dealing with multi-core CPU chips at a cost of slightly | |
812 | increased overhead in some places. If unsure say N here. | |
813 | ||
814 | source "kernel/Kconfig.preempt" | |
815 | ||
816 | config X86_UP_APIC | |
817 | bool "Local APIC support on uniprocessors" | |
e0c7ae37 | 818 | depends on X86_32 && !SMP && !X86_32_NON_STANDARD |
8f9ca475 | 819 | ---help--- |
506f1d07 SR |
820 | A local APIC (Advanced Programmable Interrupt Controller) is an |
821 | integrated interrupt controller in the CPU. If you have a single-CPU | |
822 | system which has a processor with a local APIC, you can say Y here to | |
823 | enable and use it. If you say Y here even though your machine doesn't | |
824 | have a local APIC, then the kernel will still run with no slowdown at | |
825 | all. The local APIC supports CPU-generated self-interrupts (timer, | |
826 | performance counters), and the NMI watchdog which detects hard | |
827 | lockups. | |
828 | ||
829 | config X86_UP_IOAPIC | |
830 | bool "IO-APIC support on uniprocessors" | |
831 | depends on X86_UP_APIC | |
8f9ca475 | 832 | ---help--- |
506f1d07 SR |
833 | An IO-APIC (I/O Advanced Programmable Interrupt Controller) is an |
834 | SMP-capable replacement for PC-style interrupt controllers. Most | |
835 | SMP systems and many recent uniprocessor systems have one. | |
836 | ||
837 | If you have a single-CPU system with an IO-APIC, you can say Y here | |
838 | to use it. If you say Y here even though your machine doesn't have | |
839 | an IO-APIC, then the kernel will still run with no slowdown at all. | |
840 | ||
841 | config X86_LOCAL_APIC | |
3c2362e6 | 842 | def_bool y |
e0c7ae37 | 843 | depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC |
506f1d07 SR |
844 | |
845 | config X86_IO_APIC | |
3c2362e6 | 846 | def_bool y |
1444e0c9 | 847 | depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_IOAPIC |
506f1d07 SR |
848 | |
849 | config X86_VISWS_APIC | |
3c2362e6 | 850 | def_bool y |
506f1d07 | 851 | depends on X86_32 && X86_VISWS |
506f1d07 | 852 | |
41b9eb26 SA |
853 | config X86_REROUTE_FOR_BROKEN_BOOT_IRQS |
854 | bool "Reroute for broken boot IRQs" | |
41b9eb26 | 855 | depends on X86_IO_APIC |
8f9ca475 | 856 | ---help--- |
41b9eb26 SA |
857 | This option enables a workaround that fixes a source of |
858 | spurious interrupts. This is recommended when threaded | |
859 | interrupt handling is used on systems where the generation of | |
860 | superfluous "boot interrupts" cannot be disabled. | |
861 | ||
862 | Some chipsets generate a legacy INTx "boot IRQ" when the IRQ | |
863 | entry in the chipset's IO-APIC is masked (as, e.g. the RT | |
864 | kernel does during interrupt handling). On chipsets where this | |
865 | boot IRQ generation cannot be disabled, this workaround keeps | |
866 | the original IRQ line masked so that only the equivalent "boot | |
867 | IRQ" is delivered to the CPUs. The workaround also tells the | |
868 | kernel to set up the IRQ handler on the boot IRQ line. In this | |
869 | way only one interrupt is delivered to the kernel. Otherwise | |
870 | the spurious second interrupt may cause the kernel to bring | |
871 | down (vital) interrupt lines. | |
872 | ||
873 | Only affects "broken" chipsets. Interrupt sharing may be | |
874 | increased on these systems. | |
875 | ||
506f1d07 | 876 | config X86_MCE |
bab9bc65 | 877 | bool "Machine Check / overheating reporting" |
e57dbaf7 | 878 | default y |
506f1d07 | 879 | ---help--- |
bab9bc65 AK |
880 | Machine Check support allows the processor to notify the |
881 | kernel if it detects a problem (e.g. overheating, data corruption). | |
506f1d07 | 882 | The action the kernel takes depends on the severity of the problem, |
bab9bc65 | 883 | ranging from warning messages to halting the machine. |
4efc0670 | 884 | |
506f1d07 | 885 | config X86_MCE_INTEL |
3c2362e6 HH |
886 | def_bool y |
887 | prompt "Intel MCE features" | |
c1ebf835 | 888 | depends on X86_MCE && X86_LOCAL_APIC |
8f9ca475 | 889 | ---help--- |
506f1d07 SR |
890 | Additional support for intel specific MCE features such as |
891 | the thermal monitor. | |
892 | ||
893 | config X86_MCE_AMD | |
3c2362e6 HH |
894 | def_bool y |
895 | prompt "AMD MCE features" | |
c1ebf835 | 896 | depends on X86_MCE && X86_LOCAL_APIC |
8f9ca475 | 897 | ---help--- |
506f1d07 SR |
898 | Additional support for AMD specific MCE features such as |
899 | the DRAM Error Threshold. | |
900 | ||
4efc0670 | 901 | config X86_ANCIENT_MCE |
6fc108a0 | 902 | bool "Support for old Pentium 5 / WinChip machine checks" |
c31d9633 | 903 | depends on X86_32 && X86_MCE |
cd13adcc HS |
904 | ---help--- |
905 | Include support for machine check handling on old Pentium 5 or WinChip | |
906 | systems. These typically need to be enabled explicitely on the command | |
907 | line. | |
4efc0670 | 908 | |
b2762686 AK |
909 | config X86_MCE_THRESHOLD |
910 | depends on X86_MCE_AMD || X86_MCE_INTEL | |
6fc108a0 | 911 | def_bool y |
b2762686 | 912 | |
ea149b36 | 913 | config X86_MCE_INJECT |
c1ebf835 | 914 | depends on X86_MCE |
ea149b36 AK |
915 | tristate "Machine check injector support" |
916 | ---help--- | |
917 | Provide support for injecting machine checks for testing purposes. | |
918 | If you don't know what a machine check is and you don't do kernel | |
919 | QA it is safe to say n. | |
920 | ||
4efc0670 AK |
921 | config X86_THERMAL_VECTOR |
922 | def_bool y | |
5bb38adc | 923 | depends on X86_MCE_INTEL |
4efc0670 | 924 | |
506f1d07 | 925 | config VM86 |
6a108a14 | 926 | bool "Enable VM86 support" if EXPERT |
506f1d07 SR |
927 | default y |
928 | depends on X86_32 | |
8f9ca475 IM |
929 | ---help--- |
930 | This option is required by programs like DOSEMU to run 16-bit legacy | |
506f1d07 | 931 | code on X86 processors. It also may be needed by software like |
8f9ca475 IM |
932 | XFree86 to initialize some video cards via BIOS. Disabling this |
933 | option saves about 6k. | |
506f1d07 SR |
934 | |
935 | config TOSHIBA | |
936 | tristate "Toshiba Laptop support" | |
937 | depends on X86_32 | |
938 | ---help--- | |
939 | This adds a driver to safely access the System Management Mode of | |
940 | the CPU on Toshiba portables with a genuine Toshiba BIOS. It does | |
941 | not work on models with a Phoenix BIOS. The System Management Mode | |
942 | is used to set the BIOS and power saving options on Toshiba portables. | |
943 | ||
944 | For information on utilities to make use of this driver see the | |
945 | Toshiba Linux utilities web site at: | |
946 | <http://www.buzzard.org.uk/toshiba/>. | |
947 | ||
948 | Say Y if you intend to run this kernel on a Toshiba portable. | |
949 | Say N otherwise. | |
950 | ||
951 | config I8K | |
952 | tristate "Dell laptop support" | |
949a9d70 | 953 | select HWMON |
506f1d07 SR |
954 | ---help--- |
955 | This adds a driver to safely access the System Management Mode | |
956 | of the CPU on the Dell Inspiron 8000. The System Management Mode | |
957 | is used to read cpu temperature and cooling fan status and to | |
958 | control the fans on the I8K portables. | |
959 | ||
960 | This driver has been tested only on the Inspiron 8000 but it may | |
961 | also work with other Dell laptops. You can force loading on other | |
962 | models by passing the parameter `force=1' to the module. Use at | |
963 | your own risk. | |
964 | ||
965 | For information on utilities to make use of this driver see the | |
966 | I8K Linux utilities web site at: | |
967 | <http://people.debian.org/~dz/i8k/> | |
968 | ||
969 | Say Y if you intend to run this kernel on a Dell Inspiron 8000. | |
970 | Say N otherwise. | |
971 | ||
972 | config X86_REBOOTFIXUPS | |
9ba16087 JB |
973 | bool "Enable X86 board specific fixups for reboot" |
974 | depends on X86_32 | |
506f1d07 SR |
975 | ---help--- |
976 | This enables chipset and/or board specific fixups to be done | |
977 | in order to get reboot to work correctly. This is only needed on | |
978 | some combinations of hardware and BIOS. The symptom, for which | |
979 | this config is intended, is when reboot ends with a stalled/hung | |
980 | system. | |
981 | ||
982 | Currently, the only fixup is for the Geode machines using | |
5e3a77e9 | 983 | CS5530A and CS5536 chipsets and the RDC R-321x SoC. |
506f1d07 SR |
984 | |
985 | Say Y if you want to enable the fixup. Currently, it's safe to | |
986 | enable this option even if you don't need it. | |
987 | Say N otherwise. | |
988 | ||
989 | config MICROCODE | |
e43f6e67 | 990 | tristate "CPU microcode loading support" |
506f1d07 SR |
991 | select FW_LOADER |
992 | ---help--- | |
e43f6e67 | 993 | |
506f1d07 | 994 | If you say Y here, you will be able to update the microcode on |
80cc9f10 | 995 | certain Intel and AMD processors. The Intel support is for the |
e43f6e67 BP |
996 | IA32 family, e.g. Pentium Pro, Pentium II, Pentium III, Pentium 4, |
997 | Xeon etc. The AMD support is for families 0x10 and later. You will | |
998 | obviously need the actual microcode binary data itself which is not | |
999 | shipped with the Linux kernel. | |
506f1d07 | 1000 | |
8d86f390 PO |
1001 | This option selects the general module only, you need to select |
1002 | at least one vendor specific module as well. | |
506f1d07 | 1003 | |
e43f6e67 BP |
1004 | To compile this driver as a module, choose M here: the module |
1005 | will be called microcode. | |
506f1d07 | 1006 | |
8d86f390 | 1007 | config MICROCODE_INTEL |
e43f6e67 | 1008 | bool "Intel microcode loading support" |
8f9ca475 IM |
1009 | depends on MICROCODE |
1010 | default MICROCODE | |
1011 | select FW_LOADER | |
1012 | ---help--- | |
1013 | This options enables microcode patch loading support for Intel | |
1014 | processors. | |
1015 | ||
1016 | For latest news and information on obtaining all the required | |
1017 | Intel ingredients for this driver, check: | |
1018 | <http://www.urbanmyth.org/microcode/>. | |
8d86f390 | 1019 | |
80cc9f10 | 1020 | config MICROCODE_AMD |
e43f6e67 | 1021 | bool "AMD microcode loading support" |
8f9ca475 IM |
1022 | depends on MICROCODE |
1023 | select FW_LOADER | |
1024 | ---help--- | |
1025 | If you select this option, microcode patch loading support for AMD | |
1026 | processors will be enabled. | |
80cc9f10 | 1027 | |
8f9ca475 | 1028 | config MICROCODE_OLD_INTERFACE |
3c2362e6 | 1029 | def_bool y |
506f1d07 | 1030 | depends on MICROCODE |
506f1d07 SR |
1031 | |
1032 | config X86_MSR | |
1033 | tristate "/dev/cpu/*/msr - Model-specific register support" | |
8f9ca475 | 1034 | ---help--- |
506f1d07 SR |
1035 | This device gives privileged processes access to the x86 |
1036 | Model-Specific Registers (MSRs). It is a character device with | |
1037 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. | |
1038 | MSR accesses are directed to a specific CPU on multi-processor | |
1039 | systems. | |
1040 | ||
1041 | config X86_CPUID | |
1042 | tristate "/dev/cpu/*/cpuid - CPU information support" | |
8f9ca475 | 1043 | ---help--- |
506f1d07 SR |
1044 | This device gives processes access to the x86 CPUID instruction to |
1045 | be executed on a specific processor. It is a character device | |
1046 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to | |
1047 | /dev/cpu/31/cpuid. | |
1048 | ||
1049 | choice | |
1050 | prompt "High Memory Support" | |
506f1d07 | 1051 | default HIGHMEM64G if X86_NUMAQ |
6fc108a0 | 1052 | default HIGHMEM4G |
506f1d07 SR |
1053 | depends on X86_32 |
1054 | ||
1055 | config NOHIGHMEM | |
1056 | bool "off" | |
1057 | depends on !X86_NUMAQ | |
1058 | ---help--- | |
1059 | Linux can use up to 64 Gigabytes of physical memory on x86 systems. | |
1060 | However, the address space of 32-bit x86 processors is only 4 | |
1061 | Gigabytes large. That means that, if you have a large amount of | |
1062 | physical memory, not all of it can be "permanently mapped" by the | |
1063 | kernel. The physical memory that's not permanently mapped is called | |
1064 | "high memory". | |
1065 | ||
1066 | If you are compiling a kernel which will never run on a machine with | |
1067 | more than 1 Gigabyte total physical RAM, answer "off" here (default | |
1068 | choice and suitable for most users). This will result in a "3GB/1GB" | |
1069 | split: 3GB are mapped so that each process sees a 3GB virtual memory | |
1070 | space and the remaining part of the 4GB virtual memory space is used | |
1071 | by the kernel to permanently map as much physical memory as | |
1072 | possible. | |
1073 | ||
1074 | If the machine has between 1 and 4 Gigabytes physical RAM, then | |
1075 | answer "4GB" here. | |
1076 | ||
1077 | If more than 4 Gigabytes is used then answer "64GB" here. This | |
1078 | selection turns Intel PAE (Physical Address Extension) mode on. | |
1079 | PAE implements 3-level paging on IA32 processors. PAE is fully | |
1080 | supported by Linux, PAE mode is implemented on all recent Intel | |
1081 | processors (Pentium Pro and better). NOTE: If you say "64GB" here, | |
1082 | then the kernel will not boot on CPUs that don't support PAE! | |
1083 | ||
1084 | The actual amount of total physical memory will either be | |
1085 | auto detected or can be forced by using a kernel command line option | |
1086 | such as "mem=256M". (Try "man bootparam" or see the documentation of | |
1087 | your boot loader (lilo or loadlin) about how to pass options to the | |
1088 | kernel at boot time.) | |
1089 | ||
1090 | If unsure, say "off". | |
1091 | ||
1092 | config HIGHMEM4G | |
1093 | bool "4GB" | |
1094 | depends on !X86_NUMAQ | |
8f9ca475 | 1095 | ---help--- |
506f1d07 SR |
1096 | Select this if you have a 32-bit processor and between 1 and 4 |
1097 | gigabytes of physical RAM. | |
1098 | ||
1099 | config HIGHMEM64G | |
1100 | bool "64GB" | |
eb068e78 | 1101 | depends on !M486 |
506f1d07 | 1102 | select X86_PAE |
8f9ca475 | 1103 | ---help--- |
506f1d07 SR |
1104 | Select this if you have a 32-bit processor and more than 4 |
1105 | gigabytes of physical RAM. | |
1106 | ||
1107 | endchoice | |
1108 | ||
1109 | choice | |
1110 | depends on EXPERIMENTAL | |
6a108a14 | 1111 | prompt "Memory split" if EXPERT |
506f1d07 SR |
1112 | default VMSPLIT_3G |
1113 | depends on X86_32 | |
8f9ca475 | 1114 | ---help--- |
506f1d07 SR |
1115 | Select the desired split between kernel and user memory. |
1116 | ||
1117 | If the address range available to the kernel is less than the | |
1118 | physical memory installed, the remaining memory will be available | |
1119 | as "high memory". Accessing high memory is a little more costly | |
1120 | than low memory, as it needs to be mapped into the kernel first. | |
1121 | Note that increasing the kernel address space limits the range | |
1122 | available to user programs, making the address space there | |
1123 | tighter. Selecting anything other than the default 3G/1G split | |
1124 | will also likely make your kernel incompatible with binary-only | |
1125 | kernel modules. | |
1126 | ||
1127 | If you are not absolutely sure what you are doing, leave this | |
1128 | option alone! | |
1129 | ||
1130 | config VMSPLIT_3G | |
1131 | bool "3G/1G user/kernel split" | |
1132 | config VMSPLIT_3G_OPT | |
1133 | depends on !X86_PAE | |
1134 | bool "3G/1G user/kernel split (for full 1G low memory)" | |
1135 | config VMSPLIT_2G | |
1136 | bool "2G/2G user/kernel split" | |
1137 | config VMSPLIT_2G_OPT | |
1138 | depends on !X86_PAE | |
1139 | bool "2G/2G user/kernel split (for full 2G low memory)" | |
1140 | config VMSPLIT_1G | |
1141 | bool "1G/3G user/kernel split" | |
1142 | endchoice | |
1143 | ||
1144 | config PAGE_OFFSET | |
1145 | hex | |
1146 | default 0xB0000000 if VMSPLIT_3G_OPT | |
1147 | default 0x80000000 if VMSPLIT_2G | |
1148 | default 0x78000000 if VMSPLIT_2G_OPT | |
1149 | default 0x40000000 if VMSPLIT_1G | |
1150 | default 0xC0000000 | |
1151 | depends on X86_32 | |
1152 | ||
1153 | config HIGHMEM | |
3c2362e6 | 1154 | def_bool y |
506f1d07 | 1155 | depends on X86_32 && (HIGHMEM64G || HIGHMEM4G) |
506f1d07 SR |
1156 | |
1157 | config X86_PAE | |
9ba16087 | 1158 | bool "PAE (Physical Address Extension) Support" |
506f1d07 | 1159 | depends on X86_32 && !HIGHMEM4G |
8f9ca475 | 1160 | ---help--- |
506f1d07 SR |
1161 | PAE is required for NX support, and furthermore enables |
1162 | larger swapspace support for non-overcommit purposes. It | |
1163 | has the cost of more pagetable lookup overhead, and also | |
1164 | consumes more pagetable space per process. | |
1165 | ||
600715dc | 1166 | config ARCH_PHYS_ADDR_T_64BIT |
3120e25e JB |
1167 | def_bool y |
1168 | depends on X86_64 || X86_PAE | |
600715dc | 1169 | |
66f2b061 | 1170 | config ARCH_DMA_ADDR_T_64BIT |
3120e25e JB |
1171 | def_bool y |
1172 | depends on X86_64 || HIGHMEM64G | |
66f2b061 | 1173 | |
9e899816 | 1174 | config DIRECT_GBPAGES |
6a108a14 | 1175 | bool "Enable 1GB pages for kernel pagetables" if EXPERT |
9e899816 NP |
1176 | default y |
1177 | depends on X86_64 | |
8f9ca475 | 1178 | ---help--- |
9e899816 NP |
1179 | Allow the kernel linear mapping to use 1GB pages on CPUs that |
1180 | support it. This can improve the kernel's performance a tiny bit by | |
1181 | reducing TLB pressure. If in doubt, say "Y". | |
1182 | ||
506f1d07 SR |
1183 | # Common NUMA Features |
1184 | config NUMA | |
fd51b2d7 | 1185 | bool "Numa Memory Allocation and Scheduler Support" |
506f1d07 | 1186 | depends on SMP |
604d2055 | 1187 | depends on X86_64 || (X86_32 && HIGHMEM64G && (X86_NUMAQ || X86_BIGSMP || X86_SUMMIT && ACPI) && EXPERIMENTAL) |
0699eae1 | 1188 | default y if (X86_NUMAQ || X86_SUMMIT || X86_BIGSMP) |
8f9ca475 | 1189 | ---help--- |
506f1d07 | 1190 | Enable NUMA (Non Uniform Memory Access) support. |
fd51b2d7 | 1191 | |
506f1d07 SR |
1192 | The kernel will try to allocate memory used by a CPU on the |
1193 | local memory controller of the CPU and add some more | |
1194 | NUMA awareness to the kernel. | |
1195 | ||
c280ea5e | 1196 | For 64-bit this is recommended if the system is Intel Core i7 |
fd51b2d7 KM |
1197 | (or later), AMD Opteron, or EM64T NUMA. |
1198 | ||
1199 | For 32-bit this is only needed on (rare) 32-bit-only platforms | |
1200 | that support NUMA topologies, such as NUMAQ / Summit, or if you | |
1201 | boot a 32-bit kernel on a 64-bit NUMA platform. | |
1202 | ||
1203 | Otherwise, you should say N. | |
506f1d07 SR |
1204 | |
1205 | comment "NUMA (Summit) requires SMP, 64GB highmem support, ACPI" | |
1206 | depends on X86_32 && X86_SUMMIT && (!HIGHMEM64G || !ACPI) | |
1207 | ||
eec1d4fa | 1208 | config AMD_NUMA |
3c2362e6 HH |
1209 | def_bool y |
1210 | prompt "Old style AMD Opteron NUMA detection" | |
5da0ef9a | 1211 | depends on X86_64 && NUMA && PCI |
8f9ca475 | 1212 | ---help--- |
eec1d4fa HR |
1213 | Enable AMD NUMA node topology detection. You should say Y here if |
1214 | you have a multi processor AMD system. This uses an old method to | |
1215 | read the NUMA configuration directly from the builtin Northbridge | |
1216 | of Opteron. It is recommended to use X86_64_ACPI_NUMA instead, | |
1217 | which also takes priority if both are compiled in. | |
506f1d07 SR |
1218 | |
1219 | config X86_64_ACPI_NUMA | |
3c2362e6 HH |
1220 | def_bool y |
1221 | prompt "ACPI NUMA detection" | |
506f1d07 SR |
1222 | depends on X86_64 && NUMA && ACPI && PCI |
1223 | select ACPI_NUMA | |
8f9ca475 | 1224 | ---help--- |
506f1d07 SR |
1225 | Enable ACPI SRAT based node topology detection. |
1226 | ||
6ec6e0d9 SS |
1227 | # Some NUMA nodes have memory ranges that span |
1228 | # other nodes. Even though a pfn is valid and | |
1229 | # between a node's start and end pfns, it may not | |
1230 | # reside on that node. See memmap_init_zone() | |
1231 | # for details. | |
1232 | config NODES_SPAN_OTHER_NODES | |
1233 | def_bool y | |
1234 | depends on X86_64_ACPI_NUMA | |
1235 | ||
506f1d07 SR |
1236 | config NUMA_EMU |
1237 | bool "NUMA emulation" | |
1b7e03ef | 1238 | depends on NUMA |
8f9ca475 | 1239 | ---help--- |
506f1d07 SR |
1240 | Enable NUMA emulation. A flat machine will be split |
1241 | into virtual nodes when booted with "numa=fake=N", where N is the | |
1242 | number of nodes. This is only useful for debugging. | |
1243 | ||
1244 | config NODES_SHIFT | |
d25e26b6 | 1245 | int "Maximum NUMA Nodes (as a power of 2)" if !MAXSMP |
51591e31 DR |
1246 | range 1 10 |
1247 | default "10" if MAXSMP | |
506f1d07 SR |
1248 | default "6" if X86_64 |
1249 | default "4" if X86_NUMAQ | |
1250 | default "3" | |
1251 | depends on NEED_MULTIPLE_NODES | |
8f9ca475 | 1252 | ---help--- |
1184dc2f | 1253 | Specify the maximum number of NUMA Nodes available on the target |
692105b8 | 1254 | system. Increases memory reserved to accommodate various tables. |
506f1d07 | 1255 | |
3b16651f TH |
1256 | config HAVE_ARCH_ALLOC_REMAP |
1257 | def_bool y | |
1258 | depends on X86_32 && NUMA | |
1259 | ||
506f1d07 | 1260 | config ARCH_HAVE_MEMORY_PRESENT |
3c2362e6 | 1261 | def_bool y |
506f1d07 | 1262 | depends on X86_32 && DISCONTIGMEM |
506f1d07 SR |
1263 | |
1264 | config NEED_NODE_MEMMAP_SIZE | |
3c2362e6 | 1265 | def_bool y |
506f1d07 | 1266 | depends on X86_32 && (DISCONTIGMEM || SPARSEMEM) |
506f1d07 | 1267 | |
506f1d07 SR |
1268 | config ARCH_FLATMEM_ENABLE |
1269 | def_bool y | |
3b16651f | 1270 | depends on X86_32 && !NUMA |
506f1d07 SR |
1271 | |
1272 | config ARCH_DISCONTIGMEM_ENABLE | |
1273 | def_bool y | |
b263295d | 1274 | depends on NUMA && X86_32 |
506f1d07 SR |
1275 | |
1276 | config ARCH_DISCONTIGMEM_DEFAULT | |
1277 | def_bool y | |
b263295d CL |
1278 | depends on NUMA && X86_32 |
1279 | ||
506f1d07 SR |
1280 | config ARCH_SPARSEMEM_ENABLE |
1281 | def_bool y | |
4272ebfb | 1282 | depends on X86_64 || NUMA || (EXPERIMENTAL && X86_32) || X86_32_NON_STANDARD |
506f1d07 SR |
1283 | select SPARSEMEM_STATIC if X86_32 |
1284 | select SPARSEMEM_VMEMMAP_ENABLE if X86_64 | |
1285 | ||
3b16651f TH |
1286 | config ARCH_SPARSEMEM_DEFAULT |
1287 | def_bool y | |
1288 | depends on X86_64 | |
1289 | ||
506f1d07 SR |
1290 | config ARCH_SELECT_MEMORY_MODEL |
1291 | def_bool y | |
b263295d | 1292 | depends on ARCH_SPARSEMEM_ENABLE |
506f1d07 SR |
1293 | |
1294 | config ARCH_MEMORY_PROBE | |
3120e25e JB |
1295 | def_bool y |
1296 | depends on X86_64 && MEMORY_HOTPLUG | |
506f1d07 | 1297 | |
3b16651f TH |
1298 | config ARCH_PROC_KCORE_TEXT |
1299 | def_bool y | |
1300 | depends on X86_64 && PROC_KCORE | |
1301 | ||
a29815a3 AK |
1302 | config ILLEGAL_POINTER_VALUE |
1303 | hex | |
1304 | default 0 if X86_32 | |
1305 | default 0xdead000000000000 if X86_64 | |
1306 | ||
506f1d07 SR |
1307 | source "mm/Kconfig" |
1308 | ||
1309 | config HIGHPTE | |
1310 | bool "Allocate 3rd-level pagetables from highmem" | |
6fc108a0 | 1311 | depends on HIGHMEM |
8f9ca475 | 1312 | ---help--- |
506f1d07 SR |
1313 | The VM uses one page table entry for each page of physical memory. |
1314 | For systems with a lot of RAM, this can be wasteful of precious | |
1315 | low memory. Setting this option will put user-space page table | |
1316 | entries in high memory. | |
1317 | ||
9f077871 | 1318 | config X86_CHECK_BIOS_CORRUPTION |
8f9ca475 IM |
1319 | bool "Check for low memory corruption" |
1320 | ---help--- | |
1321 | Periodically check for memory corruption in low memory, which | |
1322 | is suspected to be caused by BIOS. Even when enabled in the | |
1323 | configuration, it is disabled at runtime. Enable it by | |
1324 | setting "memory_corruption_check=1" on the kernel command | |
1325 | line. By default it scans the low 64k of memory every 60 | |
1326 | seconds; see the memory_corruption_check_size and | |
1327 | memory_corruption_check_period parameters in | |
1328 | Documentation/kernel-parameters.txt to adjust this. | |
1329 | ||
1330 | When enabled with the default parameters, this option has | |
1331 | almost no overhead, as it reserves a relatively small amount | |
1332 | of memory and scans it infrequently. It both detects corruption | |
1333 | and prevents it from affecting the running system. | |
1334 | ||
1335 | It is, however, intended as a diagnostic tool; if repeatable | |
1336 | BIOS-originated corruption always affects the same memory, | |
1337 | you can use memmap= to prevent the kernel from using that | |
1338 | memory. | |
9f077871 | 1339 | |
c885df50 | 1340 | config X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK |
8f9ca475 | 1341 | bool "Set the default setting of memory_corruption_check" |
c885df50 JF |
1342 | depends on X86_CHECK_BIOS_CORRUPTION |
1343 | default y | |
8f9ca475 IM |
1344 | ---help--- |
1345 | Set whether the default state of memory_corruption_check is | |
1346 | on or off. | |
c885df50 | 1347 | |
9ea77bdb | 1348 | config X86_RESERVE_LOW |
d0cd7425 PA |
1349 | int "Amount of low memory, in kilobytes, to reserve for the BIOS" |
1350 | default 64 | |
1351 | range 4 640 | |
8f9ca475 | 1352 | ---help--- |
d0cd7425 PA |
1353 | Specify the amount of low memory to reserve for the BIOS. |
1354 | ||
1355 | The first page contains BIOS data structures that the kernel | |
1356 | must not use, so that page must always be reserved. | |
1357 | ||
1358 | By default we reserve the first 64K of physical RAM, as a | |
1359 | number of BIOSes are known to corrupt that memory range | |
1360 | during events such as suspend/resume or monitor cable | |
1361 | insertion, so it must not be used by the kernel. | |
fc381519 | 1362 | |
d0cd7425 PA |
1363 | You can set this to 4 if you are absolutely sure that you |
1364 | trust the BIOS to get all its memory reservations and usages | |
1365 | right. If you know your BIOS have problems beyond the | |
1366 | default 64K area, you can set this to 640 to avoid using the | |
1367 | entire low memory range. | |
fc381519 | 1368 | |
d0cd7425 PA |
1369 | If you have doubts about the BIOS (e.g. suspend/resume does |
1370 | not work or there's kernel crashes after certain hardware | |
1371 | hotplug events) then you might want to enable | |
1372 | X86_CHECK_BIOS_CORRUPTION=y to allow the kernel to check | |
1373 | typical corruption patterns. | |
fc381519 | 1374 | |
d0cd7425 | 1375 | Leave this to the default value of 64 if you are unsure. |
fc381519 | 1376 | |
506f1d07 SR |
1377 | config MATH_EMULATION |
1378 | bool | |
1379 | prompt "Math emulation" if X86_32 | |
1380 | ---help--- | |
1381 | Linux can emulate a math coprocessor (used for floating point | |
1382 | operations) if you don't have one. 486DX and Pentium processors have | |
1383 | a math coprocessor built in, 486SX and 386 do not, unless you added | |
1384 | a 487DX or 387, respectively. (The messages during boot time can | |
1385 | give you some hints here ["man dmesg"].) Everyone needs either a | |
1386 | coprocessor or this emulation. | |
1387 | ||
1388 | If you don't have a math coprocessor, you need to say Y here; if you | |
1389 | say Y here even though you have a coprocessor, the coprocessor will | |
1390 | be used nevertheless. (This behavior can be changed with the kernel | |
1391 | command line option "no387", which comes handy if your coprocessor | |
1392 | is broken. Try "man bootparam" or see the documentation of your boot | |
1393 | loader (lilo or loadlin) about how to pass options to the kernel at | |
1394 | boot time.) This means that it is a good idea to say Y here if you | |
1395 | intend to use this kernel on different machines. | |
1396 | ||
1397 | More information about the internals of the Linux math coprocessor | |
1398 | emulation can be found in <file:arch/x86/math-emu/README>. | |
1399 | ||
1400 | If you are not sure, say Y; apart from resulting in a 66 KB bigger | |
1401 | kernel, it won't hurt. | |
1402 | ||
1403 | config MTRR | |
6fc108a0 | 1404 | def_bool y |
6a108a14 | 1405 | prompt "MTRR (Memory Type Range Register) support" if EXPERT |
506f1d07 SR |
1406 | ---help--- |
1407 | On Intel P6 family processors (Pentium Pro, Pentium II and later) | |
1408 | the Memory Type Range Registers (MTRRs) may be used to control | |
1409 | processor access to memory ranges. This is most useful if you have | |
1410 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining | |
1411 | allows bus write transfers to be combined into a larger transfer | |
1412 | before bursting over the PCI/AGP bus. This can increase performance | |
1413 | of image write operations 2.5 times or more. Saying Y here creates a | |
1414 | /proc/mtrr file which may be used to manipulate your processor's | |
1415 | MTRRs. Typically the X server should use this. | |
1416 | ||
1417 | This code has a reasonably generic interface so that similar | |
1418 | control registers on other processors can be easily supported | |
1419 | as well: | |
1420 | ||
1421 | The Cyrix 6x86, 6x86MX and M II processors have Address Range | |
1422 | Registers (ARRs) which provide a similar functionality to MTRRs. For | |
1423 | these, the ARRs are used to emulate the MTRRs. | |
1424 | The AMD K6-2 (stepping 8 and above) and K6-3 processors have two | |
1425 | MTRRs. The Centaur C6 (WinChip) has 8 MCRs, allowing | |
1426 | write-combining. All of these processors are supported by this code | |
1427 | and it makes sense to say Y here if you have one of them. | |
1428 | ||
1429 | Saying Y here also fixes a problem with buggy SMP BIOSes which only | |
1430 | set the MTRRs for the boot CPU and not for the secondary CPUs. This | |
1431 | can lead to all sorts of problems, so it's good to say Y here. | |
1432 | ||
1433 | You can safely say Y even if your machine doesn't have MTRRs, you'll | |
1434 | just add about 9 KB to your kernel. | |
1435 | ||
7225e751 | 1436 | See <file:Documentation/x86/mtrr.txt> for more information. |
506f1d07 | 1437 | |
95ffa243 | 1438 | config MTRR_SANITIZER |
2ffb3501 | 1439 | def_bool y |
95ffa243 YL |
1440 | prompt "MTRR cleanup support" |
1441 | depends on MTRR | |
8f9ca475 | 1442 | ---help--- |
aba3728c TG |
1443 | Convert MTRR layout from continuous to discrete, so X drivers can |
1444 | add writeback entries. | |
95ffa243 | 1445 | |
aba3728c | 1446 | Can be disabled with disable_mtrr_cleanup on the kernel command line. |
692105b8 | 1447 | The largest mtrr entry size for a continuous block can be set with |
aba3728c | 1448 | mtrr_chunk_size. |
95ffa243 | 1449 | |
2ffb3501 | 1450 | If unsure, say Y. |
95ffa243 YL |
1451 | |
1452 | config MTRR_SANITIZER_ENABLE_DEFAULT | |
f5098d62 YL |
1453 | int "MTRR cleanup enable value (0-1)" |
1454 | range 0 1 | |
1455 | default "0" | |
95ffa243 | 1456 | depends on MTRR_SANITIZER |
8f9ca475 | 1457 | ---help--- |
f5098d62 | 1458 | Enable mtrr cleanup default value |
95ffa243 | 1459 | |
12031a62 YL |
1460 | config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT |
1461 | int "MTRR cleanup spare reg num (0-7)" | |
1462 | range 0 7 | |
1463 | default "1" | |
1464 | depends on MTRR_SANITIZER | |
8f9ca475 | 1465 | ---help--- |
12031a62 | 1466 | mtrr cleanup spare entries default, it can be changed via |
aba3728c | 1467 | mtrr_spare_reg_nr=N on the kernel command line. |
12031a62 | 1468 | |
2e5d9c85 | 1469 | config X86_PAT |
6fc108a0 | 1470 | def_bool y |
6a108a14 | 1471 | prompt "x86 PAT support" if EXPERT |
2a8a2719 | 1472 | depends on MTRR |
8f9ca475 | 1473 | ---help--- |
2e5d9c85 | 1474 | Use PAT attributes to setup page level cache control. |
042b78e4 | 1475 | |
2e5d9c85 | 1476 | PATs are the modern equivalents of MTRRs and are much more |
1477 | flexible than MTRRs. | |
1478 | ||
1479 | Say N here if you see bootup problems (boot crash, boot hang, | |
042b78e4 | 1480 | spontaneous reboots) or a non-working video driver. |
2e5d9c85 | 1481 | |
1482 | If unsure, say Y. | |
1483 | ||
46cf98cd VP |
1484 | config ARCH_USES_PG_UNCACHED |
1485 | def_bool y | |
1486 | depends on X86_PAT | |
1487 | ||
628c6246 PA |
1488 | config ARCH_RANDOM |
1489 | def_bool y | |
1490 | prompt "x86 architectural random number generator" if EXPERT | |
1491 | ---help--- | |
1492 | Enable the x86 architectural RDRAND instruction | |
1493 | (Intel Bull Mountain technology) to generate random numbers. | |
1494 | If supported, this is a high bandwidth, cryptographically | |
1495 | secure hardware random number generator. | |
1496 | ||
51ae4a2d PA |
1497 | config X86_SMAP |
1498 | def_bool y | |
1499 | prompt "Supervisor Mode Access Prevention" if EXPERT | |
1500 | ---help--- | |
1501 | Supervisor Mode Access Prevention (SMAP) is a security | |
1502 | feature in newer Intel processors. There is a small | |
1503 | performance cost if this enabled and turned on; there is | |
1504 | also a small increase in the kernel size if this is enabled. | |
1505 | ||
1506 | If unsure, say Y. | |
1507 | ||
506f1d07 | 1508 | config EFI |
9ba16087 | 1509 | bool "EFI runtime service support" |
5b83683f | 1510 | depends on ACPI |
506f1d07 | 1511 | ---help--- |
8f9ca475 IM |
1512 | This enables the kernel to use EFI runtime services that are |
1513 | available (such as the EFI variable services). | |
506f1d07 | 1514 | |
8f9ca475 IM |
1515 | This option is only useful on systems that have EFI firmware. |
1516 | In addition, you should use the latest ELILO loader available | |
1517 | at <http://elilo.sourceforge.net> in order to take advantage | |
1518 | of EFI runtime services. However, even with this option, the | |
1519 | resultant kernel should continue to boot on existing non-EFI | |
1520 | platforms. | |
506f1d07 | 1521 | |
291f3632 MF |
1522 | config EFI_STUB |
1523 | bool "EFI stub support" | |
1524 | depends on EFI | |
1525 | ---help--- | |
1526 | This kernel feature allows a bzImage to be loaded directly | |
1527 | by EFI firmware without the use of a bootloader. | |
1528 | ||
0c759662 MF |
1529 | See Documentation/x86/efi-stub.txt for more information. |
1530 | ||
506f1d07 | 1531 | config SECCOMP |
3c2362e6 HH |
1532 | def_bool y |
1533 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
8f9ca475 | 1534 | ---help--- |
506f1d07 SR |
1535 | This kernel feature is useful for number crunching applications |
1536 | that may need to compute untrusted bytecode during their | |
1537 | execution. By using pipes or other transports made available to | |
1538 | the process as file descriptors supporting the read/write | |
1539 | syscalls, it's possible to isolate those applications in | |
1540 | their own address space using seccomp. Once seccomp is | |
9c0bbee8 | 1541 | enabled via prctl(PR_SET_SECCOMP), it cannot be disabled |
506f1d07 SR |
1542 | and the task is only allowed to execute a few safe syscalls |
1543 | defined by each seccomp mode. | |
1544 | ||
1545 | If unsure, say Y. Only embedded should say N here. | |
1546 | ||
1547 | config CC_STACKPROTECTOR | |
2a8ac745 | 1548 | bool "Enable -fstack-protector buffer overflow detection" |
8f9ca475 IM |
1549 | ---help--- |
1550 | This option turns on the -fstack-protector GCC feature. This | |
113c5413 IM |
1551 | feature puts, at the beginning of functions, a canary value on |
1552 | the stack just before the return address, and validates | |
506f1d07 SR |
1553 | the value just before actually returning. Stack based buffer |
1554 | overflows (that need to overwrite this return address) now also | |
1555 | overwrite the canary, which gets detected and the attack is then | |
1556 | neutralized via a kernel panic. | |
1557 | ||
1558 | This feature requires gcc version 4.2 or above, or a distribution | |
1559 | gcc with the feature backported. Older versions are automatically | |
113c5413 IM |
1560 | detected and for those versions, this configuration option is |
1561 | ignored. (and a warning is printed during bootup) | |
506f1d07 SR |
1562 | |
1563 | source kernel/Kconfig.hz | |
1564 | ||
1565 | config KEXEC | |
1566 | bool "kexec system call" | |
8f9ca475 | 1567 | ---help--- |
506f1d07 SR |
1568 | kexec is a system call that implements the ability to shutdown your |
1569 | current kernel, and to start another kernel. It is like a reboot | |
1570 | but it is independent of the system firmware. And like a reboot | |
1571 | you can start any kernel with it, not just Linux. | |
1572 | ||
1573 | The name comes from the similarity to the exec system call. | |
1574 | ||
1575 | It is an ongoing process to be certain the hardware in a machine | |
1576 | is properly shutdown, so do not be surprised if this code does not | |
1577 | initially work for you. It may help to enable device hotplugging | |
1578 | support. As of this writing the exact hardware interface is | |
1579 | strongly in flux, so no good recommendation can be made. | |
1580 | ||
1581 | config CRASH_DUMP | |
04b69447 | 1582 | bool "kernel crash dumps" |
506f1d07 | 1583 | depends on X86_64 || (X86_32 && HIGHMEM) |
8f9ca475 | 1584 | ---help--- |
506f1d07 SR |
1585 | Generate crash dump after being started by kexec. |
1586 | This should be normally only set in special crash dump kernels | |
1587 | which are loaded in the main kernel with kexec-tools into | |
1588 | a specially reserved region and then later executed after | |
1589 | a crash by kdump/kexec. The crash dump kernel must be compiled | |
1590 | to a memory address not used by the main kernel or BIOS using | |
1591 | PHYSICAL_START, or it must be built as a relocatable image | |
1592 | (CONFIG_RELOCATABLE=y). | |
1593 | For more details see Documentation/kdump/kdump.txt | |
1594 | ||
3ab83521 HY |
1595 | config KEXEC_JUMP |
1596 | bool "kexec jump (EXPERIMENTAL)" | |
1597 | depends on EXPERIMENTAL | |
fee7b0d8 | 1598 | depends on KEXEC && HIBERNATION |
8f9ca475 | 1599 | ---help--- |
89081d17 HY |
1600 | Jump between original kernel and kexeced kernel and invoke |
1601 | code in physical address mode via KEXEC | |
3ab83521 | 1602 | |
506f1d07 | 1603 | config PHYSICAL_START |
6a108a14 | 1604 | hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) |
ceefccc9 | 1605 | default "0x1000000" |
8f9ca475 | 1606 | ---help--- |
506f1d07 SR |
1607 | This gives the physical address where the kernel is loaded. |
1608 | ||
1609 | If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then | |
1610 | bzImage will decompress itself to above physical address and | |
1611 | run from there. Otherwise, bzImage will run from the address where | |
1612 | it has been loaded by the boot loader and will ignore above physical | |
1613 | address. | |
1614 | ||
1615 | In normal kdump cases one does not have to set/change this option | |
1616 | as now bzImage can be compiled as a completely relocatable image | |
1617 | (CONFIG_RELOCATABLE=y) and be used to load and run from a different | |
1618 | address. This option is mainly useful for the folks who don't want | |
1619 | to use a bzImage for capturing the crash dump and want to use a | |
1620 | vmlinux instead. vmlinux is not relocatable hence a kernel needs | |
1621 | to be specifically compiled to run from a specific memory area | |
1622 | (normally a reserved region) and this option comes handy. | |
1623 | ||
ceefccc9 PA |
1624 | So if you are using bzImage for capturing the crash dump, |
1625 | leave the value here unchanged to 0x1000000 and set | |
1626 | CONFIG_RELOCATABLE=y. Otherwise if you plan to use vmlinux | |
1627 | for capturing the crash dump change this value to start of | |
1628 | the reserved region. In other words, it can be set based on | |
1629 | the "X" value as specified in the "crashkernel=YM@XM" | |
1630 | command line boot parameter passed to the panic-ed | |
1631 | kernel. Please take a look at Documentation/kdump/kdump.txt | |
1632 | for more details about crash dumps. | |
506f1d07 SR |
1633 | |
1634 | Usage of bzImage for capturing the crash dump is recommended as | |
1635 | one does not have to build two kernels. Same kernel can be used | |
1636 | as production kernel and capture kernel. Above option should have | |
1637 | gone away after relocatable bzImage support is introduced. But it | |
1638 | is present because there are users out there who continue to use | |
1639 | vmlinux for dump capture. This option should go away down the | |
1640 | line. | |
1641 | ||
1642 | Don't change this unless you know what you are doing. | |
1643 | ||
1644 | config RELOCATABLE | |
26717808 PA |
1645 | bool "Build a relocatable kernel" |
1646 | default y | |
8f9ca475 | 1647 | ---help--- |
506f1d07 SR |
1648 | This builds a kernel image that retains relocation information |
1649 | so it can be loaded someplace besides the default 1MB. | |
1650 | The relocations tend to make the kernel binary about 10% larger, | |
1651 | but are discarded at runtime. | |
1652 | ||
1653 | One use is for the kexec on panic case where the recovery kernel | |
1654 | must live at a different physical address than the primary | |
1655 | kernel. | |
1656 | ||
1657 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
1658 | it has been loaded at and the compile time physical address | |
1659 | (CONFIG_PHYSICAL_START) is ignored. | |
1660 | ||
845adf72 PA |
1661 | # Relocation on x86-32 needs some additional build support |
1662 | config X86_NEED_RELOCS | |
1663 | def_bool y | |
1664 | depends on X86_32 && RELOCATABLE | |
1665 | ||
506f1d07 | 1666 | config PHYSICAL_ALIGN |
6fc108a0 | 1667 | hex "Alignment value to which kernel should be aligned" if X86_32 |
ceefccc9 PA |
1668 | default "0x1000000" |
1669 | range 0x2000 0x1000000 | |
8f9ca475 | 1670 | ---help--- |
506f1d07 SR |
1671 | This value puts the alignment restrictions on physical address |
1672 | where kernel is loaded and run from. Kernel is compiled for an | |
1673 | address which meets above alignment restriction. | |
1674 | ||
1675 | If bootloader loads the kernel at a non-aligned address and | |
1676 | CONFIG_RELOCATABLE is set, kernel will move itself to nearest | |
1677 | address aligned to above value and run from there. | |
1678 | ||
1679 | If bootloader loads the kernel at a non-aligned address and | |
1680 | CONFIG_RELOCATABLE is not set, kernel will ignore the run time | |
1681 | load address and decompress itself to the address it has been | |
1682 | compiled for and run from there. The address for which kernel is | |
1683 | compiled already meets above alignment restrictions. Hence the | |
1684 | end result is that kernel runs from a physical address meeting | |
1685 | above alignment restrictions. | |
1686 | ||
1687 | Don't change this unless you know what you are doing. | |
1688 | ||
1689 | config HOTPLUG_CPU | |
7c13e6a3 | 1690 | bool "Support for hot-pluggable CPUs" |
4b19ed91 | 1691 | depends on SMP && HOTPLUG |
506f1d07 | 1692 | ---help--- |
7c13e6a3 DS |
1693 | Say Y here to allow turning CPUs off and on. CPUs can be |
1694 | controlled through /sys/devices/system/cpu. | |
1695 | ( Note: power management support will enable this option | |
1696 | automatically on SMP systems. ) | |
1697 | Say N if you want to disable CPU hotplug. | |
506f1d07 | 1698 | |
80aa1dff FY |
1699 | config BOOTPARAM_HOTPLUG_CPU0 |
1700 | bool "Set default setting of cpu0_hotpluggable" | |
1701 | default n | |
1702 | depends on HOTPLUG_CPU && EXPERIMENTAL | |
1703 | ---help--- | |
1704 | Set whether default state of cpu0_hotpluggable is on or off. | |
1705 | ||
1706 | Say Y here to enable CPU0 hotplug by default. If this switch | |
1707 | is turned on, there is no need to give cpu0_hotplug kernel | |
1708 | parameter and the CPU0 hotplug feature is enabled by default. | |
1709 | ||
1710 | Please note: there are two known CPU0 dependencies if you want | |
1711 | to enable the CPU0 hotplug feature either by this switch or by | |
1712 | cpu0_hotplug kernel parameter. | |
1713 | ||
1714 | First, resume from hibernate or suspend always starts from CPU0. | |
1715 | So hibernate and suspend are prevented if CPU0 is offline. | |
1716 | ||
1717 | Second dependency is PIC interrupts always go to CPU0. CPU0 can not | |
1718 | offline if any interrupt can not migrate out of CPU0. There may | |
1719 | be other CPU0 dependencies. | |
1720 | ||
1721 | Please make sure the dependencies are under your control before | |
1722 | you enable this feature. | |
1723 | ||
1724 | Say N if you don't want to enable CPU0 hotplug feature by default. | |
1725 | You still can enable the CPU0 hotplug feature at boot by kernel | |
1726 | parameter cpu0_hotplug. | |
1727 | ||
a71c8bc5 FY |
1728 | config DEBUG_HOTPLUG_CPU0 |
1729 | def_bool n | |
1730 | prompt "Debug CPU0 hotplug" | |
1731 | depends on HOTPLUG_CPU && EXPERIMENTAL | |
1732 | ---help--- | |
1733 | Enabling this option offlines CPU0 (if CPU0 can be offlined) as | |
1734 | soon as possible and boots up userspace with CPU0 offlined. User | |
1735 | can online CPU0 back after boot time. | |
1736 | ||
1737 | To debug CPU0 hotplug, you need to enable CPU0 offline/online | |
1738 | feature by either turning on CONFIG_BOOTPARAM_HOTPLUG_CPU0 during | |
1739 | compilation or giving cpu0_hotplug kernel parameter at boot. | |
1740 | ||
1741 | If unsure, say N. | |
1742 | ||
506f1d07 | 1743 | config COMPAT_VDSO |
3c2362e6 HH |
1744 | def_bool y |
1745 | prompt "Compat VDSO support" | |
af65d648 | 1746 | depends on X86_32 || IA32_EMULATION |
8f9ca475 | 1747 | ---help--- |
af65d648 | 1748 | Map the 32-bit VDSO to the predictable old-style address too. |
e84446de | 1749 | |
506f1d07 SR |
1750 | Say N here if you are running a sufficiently recent glibc |
1751 | version (2.3.3 or later), to remove the high-mapped | |
1752 | VDSO mapping and to exclusively use the randomized VDSO. | |
1753 | ||
1754 | If unsure, say Y. | |
1755 | ||
516cbf37 TB |
1756 | config CMDLINE_BOOL |
1757 | bool "Built-in kernel command line" | |
8f9ca475 | 1758 | ---help--- |
516cbf37 TB |
1759 | Allow for specifying boot arguments to the kernel at |
1760 | build time. On some systems (e.g. embedded ones), it is | |
1761 | necessary or convenient to provide some or all of the | |
1762 | kernel boot arguments with the kernel itself (that is, | |
1763 | to not rely on the boot loader to provide them.) | |
1764 | ||
1765 | To compile command line arguments into the kernel, | |
1766 | set this option to 'Y', then fill in the | |
1767 | the boot arguments in CONFIG_CMDLINE. | |
1768 | ||
1769 | Systems with fully functional boot loaders (i.e. non-embedded) | |
1770 | should leave this option set to 'N'. | |
1771 | ||
1772 | config CMDLINE | |
1773 | string "Built-in kernel command string" | |
1774 | depends on CMDLINE_BOOL | |
1775 | default "" | |
8f9ca475 | 1776 | ---help--- |
516cbf37 TB |
1777 | Enter arguments here that should be compiled into the kernel |
1778 | image and used at boot time. If the boot loader provides a | |
1779 | command line at boot time, it is appended to this string to | |
1780 | form the full kernel command line, when the system boots. | |
1781 | ||
1782 | However, you can use the CONFIG_CMDLINE_OVERRIDE option to | |
1783 | change this behavior. | |
1784 | ||
1785 | In most cases, the command line (whether built-in or provided | |
1786 | by the boot loader) should specify the device for the root | |
1787 | file system. | |
1788 | ||
1789 | config CMDLINE_OVERRIDE | |
1790 | bool "Built-in command line overrides boot loader arguments" | |
516cbf37 | 1791 | depends on CMDLINE_BOOL |
8f9ca475 | 1792 | ---help--- |
516cbf37 TB |
1793 | Set this option to 'Y' to have the kernel ignore the boot loader |
1794 | command line, and use ONLY the built-in command line. | |
1795 | ||
1796 | This is used to work around broken boot loaders. This should | |
1797 | be set to 'N' under normal conditions. | |
1798 | ||
506f1d07 SR |
1799 | endmenu |
1800 | ||
1801 | config ARCH_ENABLE_MEMORY_HOTPLUG | |
1802 | def_bool y | |
1803 | depends on X86_64 || (X86_32 && HIGHMEM) | |
1804 | ||
35551053 GH |
1805 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
1806 | def_bool y | |
1807 | depends on MEMORY_HOTPLUG | |
1808 | ||
e534c7c5 | 1809 | config USE_PERCPU_NUMA_NODE_ID |
645a7919 | 1810 | def_bool y |
e534c7c5 LS |
1811 | depends on NUMA |
1812 | ||
da85f865 | 1813 | menu "Power management and ACPI options" |
e279b6c1 SR |
1814 | |
1815 | config ARCH_HIBERNATION_HEADER | |
3c2362e6 | 1816 | def_bool y |
e279b6c1 | 1817 | depends on X86_64 && HIBERNATION |
e279b6c1 SR |
1818 | |
1819 | source "kernel/power/Kconfig" | |
1820 | ||
1821 | source "drivers/acpi/Kconfig" | |
1822 | ||
efafc8b2 FT |
1823 | source "drivers/sfi/Kconfig" |
1824 | ||
a6b68076 | 1825 | config X86_APM_BOOT |
6fc108a0 | 1826 | def_bool y |
282e5aab | 1827 | depends on APM |
a6b68076 | 1828 | |
e279b6c1 SR |
1829 | menuconfig APM |
1830 | tristate "APM (Advanced Power Management) BIOS support" | |
efefa6f6 | 1831 | depends on X86_32 && PM_SLEEP |
e279b6c1 SR |
1832 | ---help--- |
1833 | APM is a BIOS specification for saving power using several different | |
1834 | techniques. This is mostly useful for battery powered laptops with | |
1835 | APM compliant BIOSes. If you say Y here, the system time will be | |
1836 | reset after a RESUME operation, the /proc/apm device will provide | |
1837 | battery status information, and user-space programs will receive | |
1838 | notification of APM "events" (e.g. battery status change). | |
1839 | ||
1840 | If you select "Y" here, you can disable actual use of the APM | |
1841 | BIOS by passing the "apm=off" option to the kernel at boot time. | |
1842 | ||
1843 | Note that the APM support is almost completely disabled for | |
1844 | machines with more than one CPU. | |
1845 | ||
1846 | In order to use APM, you will need supporting software. For location | |
2dc98fd3 MW |
1847 | and more information, read <file:Documentation/power/apm-acpi.txt> |
1848 | and the Battery Powered Linux mini-HOWTO, available from | |
e279b6c1 SR |
1849 | <http://www.tldp.org/docs.html#howto>. |
1850 | ||
1851 | This driver does not spin down disk drives (see the hdparm(8) | |
1852 | manpage ("man 8 hdparm") for that), and it doesn't turn off | |
1853 | VESA-compliant "green" monitors. | |
1854 | ||
1855 | This driver does not support the TI 4000M TravelMate and the ACER | |
1856 | 486/DX4/75 because they don't have compliant BIOSes. Many "green" | |
1857 | desktop machines also don't have compliant BIOSes, and this driver | |
1858 | may cause those machines to panic during the boot phase. | |
1859 | ||
1860 | Generally, if you don't have a battery in your machine, there isn't | |
1861 | much point in using this driver and you should say N. If you get | |
1862 | random kernel OOPSes or reboots that don't seem to be related to | |
1863 | anything, try disabling/enabling this option (or disabling/enabling | |
1864 | APM in your BIOS). | |
1865 | ||
1866 | Some other things you should try when experiencing seemingly random, | |
1867 | "weird" problems: | |
1868 | ||
1869 | 1) make sure that you have enough swap space and that it is | |
1870 | enabled. | |
1871 | 2) pass the "no-hlt" option to the kernel | |
1872 | 3) switch on floating point emulation in the kernel and pass | |
1873 | the "no387" option to the kernel | |
1874 | 4) pass the "floppy=nodma" option to the kernel | |
1875 | 5) pass the "mem=4M" option to the kernel (thereby disabling | |
1876 | all but the first 4 MB of RAM) | |
1877 | 6) make sure that the CPU is not over clocked. | |
1878 | 7) read the sig11 FAQ at <http://www.bitwizard.nl/sig11/> | |
1879 | 8) disable the cache from your BIOS settings | |
1880 | 9) install a fan for the video card or exchange video RAM | |
1881 | 10) install a better fan for the CPU | |
1882 | 11) exchange RAM chips | |
1883 | 12) exchange the motherboard. | |
1884 | ||
1885 | To compile this driver as a module, choose M here: the | |
1886 | module will be called apm. | |
1887 | ||
1888 | if APM | |
1889 | ||
1890 | config APM_IGNORE_USER_SUSPEND | |
1891 | bool "Ignore USER SUSPEND" | |
8f9ca475 | 1892 | ---help--- |
e279b6c1 SR |
1893 | This option will ignore USER SUSPEND requests. On machines with a |
1894 | compliant APM BIOS, you want to say N. However, on the NEC Versa M | |
1895 | series notebooks, it is necessary to say Y because of a BIOS bug. | |
1896 | ||
1897 | config APM_DO_ENABLE | |
1898 | bool "Enable PM at boot time" | |
1899 | ---help--- | |
1900 | Enable APM features at boot time. From page 36 of the APM BIOS | |
1901 | specification: "When disabled, the APM BIOS does not automatically | |
1902 | power manage devices, enter the Standby State, enter the Suspend | |
1903 | State, or take power saving steps in response to CPU Idle calls." | |
1904 | This driver will make CPU Idle calls when Linux is idle (unless this | |
1905 | feature is turned off -- see "Do CPU IDLE calls", below). This | |
1906 | should always save battery power, but more complicated APM features | |
1907 | will be dependent on your BIOS implementation. You may need to turn | |
1908 | this option off if your computer hangs at boot time when using APM | |
1909 | support, or if it beeps continuously instead of suspending. Turn | |
1910 | this off if you have a NEC UltraLite Versa 33/C or a Toshiba | |
1911 | T400CDT. This is off by default since most machines do fine without | |
1912 | this feature. | |
1913 | ||
1914 | config APM_CPU_IDLE | |
1915 | bool "Make CPU Idle calls when idle" | |
8f9ca475 | 1916 | ---help--- |
e279b6c1 SR |
1917 | Enable calls to APM CPU Idle/CPU Busy inside the kernel's idle loop. |
1918 | On some machines, this can activate improved power savings, such as | |
1919 | a slowed CPU clock rate, when the machine is idle. These idle calls | |
1920 | are made after the idle loop has run for some length of time (e.g., | |
1921 | 333 mS). On some machines, this will cause a hang at boot time or | |
1922 | whenever the CPU becomes idle. (On machines with more than one CPU, | |
1923 | this option does nothing.) | |
1924 | ||
1925 | config APM_DISPLAY_BLANK | |
1926 | bool "Enable console blanking using APM" | |
8f9ca475 | 1927 | ---help--- |
e279b6c1 SR |
1928 | Enable console blanking using the APM. Some laptops can use this to |
1929 | turn off the LCD backlight when the screen blanker of the Linux | |
1930 | virtual console blanks the screen. Note that this is only used by | |
1931 | the virtual console screen blanker, and won't turn off the backlight | |
1932 | when using the X Window system. This also doesn't have anything to | |
1933 | do with your VESA-compliant power-saving monitor. Further, this | |
1934 | option doesn't work for all laptops -- it might not turn off your | |
1935 | backlight at all, or it might print a lot of errors to the console, | |
1936 | especially if you are using gpm. | |
1937 | ||
1938 | config APM_ALLOW_INTS | |
1939 | bool "Allow interrupts during APM BIOS calls" | |
8f9ca475 | 1940 | ---help--- |
e279b6c1 SR |
1941 | Normally we disable external interrupts while we are making calls to |
1942 | the APM BIOS as a measure to lessen the effects of a badly behaving | |
1943 | BIOS implementation. The BIOS should reenable interrupts if it | |
1944 | needs to. Unfortunately, some BIOSes do not -- especially those in | |
1945 | many of the newer IBM Thinkpads. If you experience hangs when you | |
1946 | suspend, try setting this to Y. Otherwise, say N. | |
1947 | ||
e279b6c1 SR |
1948 | endif # APM |
1949 | ||
bb0a56ec | 1950 | source "drivers/cpufreq/Kconfig" |
e279b6c1 SR |
1951 | |
1952 | source "drivers/cpuidle/Kconfig" | |
1953 | ||
27471fdb AH |
1954 | source "drivers/idle/Kconfig" |
1955 | ||
e279b6c1 SR |
1956 | endmenu |
1957 | ||
1958 | ||
1959 | menu "Bus options (PCI etc.)" | |
1960 | ||
1961 | config PCI | |
1ac97018 | 1962 | bool "PCI support" |
1c858087 | 1963 | default y |
e279b6c1 | 1964 | select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC) |
8f9ca475 | 1965 | ---help--- |
e279b6c1 SR |
1966 | Find out whether you have a PCI motherboard. PCI is the name of a |
1967 | bus system, i.e. the way the CPU talks to the other stuff inside | |
1968 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
1969 | VESA. If you have PCI, say Y, otherwise N. | |
1970 | ||
e279b6c1 SR |
1971 | choice |
1972 | prompt "PCI access mode" | |
efefa6f6 | 1973 | depends on X86_32 && PCI |
e279b6c1 SR |
1974 | default PCI_GOANY |
1975 | ---help--- | |
1976 | On PCI systems, the BIOS can be used to detect the PCI devices and | |
1977 | determine their configuration. However, some old PCI motherboards | |
1978 | have BIOS bugs and may crash if this is done. Also, some embedded | |
1979 | PCI-based systems don't have any BIOS at all. Linux can also try to | |
1980 | detect the PCI hardware directly without using the BIOS. | |
1981 | ||
1982 | With this option, you can specify how Linux should detect the | |
1983 | PCI devices. If you choose "BIOS", the BIOS will be used, | |
1984 | if you choose "Direct", the BIOS won't be used, and if you | |
1985 | choose "MMConfig", then PCI Express MMCONFIG will be used. | |
1986 | If you choose "Any", the kernel will try MMCONFIG, then the | |
1987 | direct access method and falls back to the BIOS if that doesn't | |
1988 | work. If unsure, go with the default, which is "Any". | |
1989 | ||
1990 | config PCI_GOBIOS | |
1991 | bool "BIOS" | |
1992 | ||
1993 | config PCI_GOMMCONFIG | |
1994 | bool "MMConfig" | |
1995 | ||
1996 | config PCI_GODIRECT | |
1997 | bool "Direct" | |
1998 | ||
3ef0e1f8 | 1999 | config PCI_GOOLPC |
76fb6570 | 2000 | bool "OLPC XO-1" |
3ef0e1f8 AS |
2001 | depends on OLPC |
2002 | ||
2bdd1b03 AS |
2003 | config PCI_GOANY |
2004 | bool "Any" | |
2005 | ||
e279b6c1 SR |
2006 | endchoice |
2007 | ||
2008 | config PCI_BIOS | |
3c2362e6 | 2009 | def_bool y |
efefa6f6 | 2010 | depends on X86_32 && PCI && (PCI_GOBIOS || PCI_GOANY) |
e279b6c1 SR |
2011 | |
2012 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. | |
2013 | config PCI_DIRECT | |
3c2362e6 | 2014 | def_bool y |
0aba496f | 2015 | depends on PCI && (X86_64 || (PCI_GODIRECT || PCI_GOANY || PCI_GOOLPC || PCI_GOMMCONFIG)) |
e279b6c1 SR |
2016 | |
2017 | config PCI_MMCONFIG | |
3c2362e6 | 2018 | def_bool y |
5f0db7a2 | 2019 | depends on X86_32 && PCI && (ACPI || SFI) && (PCI_GOMMCONFIG || PCI_GOANY) |
e279b6c1 | 2020 | |
3ef0e1f8 | 2021 | config PCI_OLPC |
2bdd1b03 AS |
2022 | def_bool y |
2023 | depends on PCI && OLPC && (PCI_GOOLPC || PCI_GOANY) | |
3ef0e1f8 | 2024 | |
b5401a96 AN |
2025 | config PCI_XEN |
2026 | def_bool y | |
2027 | depends on PCI && XEN | |
2028 | select SWIOTLB_XEN | |
2029 | ||
e279b6c1 | 2030 | config PCI_DOMAINS |
3c2362e6 | 2031 | def_bool y |
e279b6c1 | 2032 | depends on PCI |
e279b6c1 SR |
2033 | |
2034 | config PCI_MMCONFIG | |
2035 | bool "Support mmconfig PCI config space access" | |
2036 | depends on X86_64 && PCI && ACPI | |
2037 | ||
3f6ea84a | 2038 | config PCI_CNB20LE_QUIRK |
6a108a14 | 2039 | bool "Read CNB20LE Host Bridge Windows" if EXPERT |
64a5fed6 | 2040 | depends on PCI && EXPERIMENTAL |
3f6ea84a IS |
2041 | help |
2042 | Read the PCI windows out of the CNB20LE host bridge. This allows | |
2043 | PCI hotplug to work on systems with the CNB20LE chipset which do | |
2044 | not have ACPI. | |
2045 | ||
64a5fed6 BH |
2046 | There's no public spec for this chipset, and this functionality |
2047 | is known to be incomplete. | |
2048 | ||
2049 | You should say N unless you know you need this. | |
2050 | ||
e279b6c1 SR |
2051 | source "drivers/pci/pcie/Kconfig" |
2052 | ||
2053 | source "drivers/pci/Kconfig" | |
2054 | ||
1c00f016 | 2055 | # x86_64 have no ISA slots, but can have ISA-style DMA. |
e279b6c1 | 2056 | config ISA_DMA_API |
1c00f016 DR |
2057 | bool "ISA-style DMA support" if (X86_64 && EXPERT) |
2058 | default y | |
2059 | help | |
2060 | Enables ISA-style DMA support for devices requiring such controllers. | |
2061 | If unsure, say Y. | |
e279b6c1 SR |
2062 | |
2063 | if X86_32 | |
2064 | ||
2065 | config ISA | |
2066 | bool "ISA support" | |
8f9ca475 | 2067 | ---help--- |
e279b6c1 SR |
2068 | Find out whether you have ISA slots on your motherboard. ISA is the |
2069 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
2070 | inside your box. Other bus systems are PCI, EISA, MicroChannel | |
2071 | (MCA) or VESA. ISA is an older system, now being displaced by PCI; | |
2072 | newer boards don't support it. If you have ISA, say Y, otherwise N. | |
2073 | ||
2074 | config EISA | |
2075 | bool "EISA support" | |
2076 | depends on ISA | |
2077 | ---help--- | |
2078 | The Extended Industry Standard Architecture (EISA) bus was | |
2079 | developed as an open alternative to the IBM MicroChannel bus. | |
2080 | ||
2081 | The EISA bus provided some of the features of the IBM MicroChannel | |
2082 | bus while maintaining backward compatibility with cards made for | |
2083 | the older ISA bus. The EISA bus saw limited use between 1988 and | |
2084 | 1995 when it was made obsolete by the PCI bus. | |
2085 | ||
2086 | Say Y here if you are building a kernel for an EISA-based machine. | |
2087 | ||
2088 | Otherwise, say N. | |
2089 | ||
2090 | source "drivers/eisa/Kconfig" | |
2091 | ||
e279b6c1 SR |
2092 | config SCx200 |
2093 | tristate "NatSemi SCx200 support" | |
8f9ca475 | 2094 | ---help--- |
e279b6c1 SR |
2095 | This provides basic support for National Semiconductor's |
2096 | (now AMD's) Geode processors. The driver probes for the | |
2097 | PCI-IDs of several on-chip devices, so its a good dependency | |
2098 | for other scx200_* drivers. | |
2099 | ||
2100 | If compiled as a module, the driver is named scx200. | |
2101 | ||
2102 | config SCx200HR_TIMER | |
2103 | tristate "NatSemi SCx200 27MHz High-Resolution Timer Support" | |
592913ec | 2104 | depends on SCx200 |
e279b6c1 | 2105 | default y |
8f9ca475 | 2106 | ---help--- |
e279b6c1 SR |
2107 | This driver provides a clocksource built upon the on-chip |
2108 | 27MHz high-resolution timer. Its also a workaround for | |
2109 | NSC Geode SC-1100's buggy TSC, which loses time when the | |
2110 | processor goes idle (as is done by the scheduler). The | |
2111 | other workaround is idle=poll boot option. | |
2112 | ||
3ef0e1f8 AS |
2113 | config OLPC |
2114 | bool "One Laptop Per Child support" | |
54008979 | 2115 | depends on !X86_PAE |
3c554946 | 2116 | select GPIOLIB |
dc3119e7 | 2117 | select OF |
45bb1674 | 2118 | select OF_PROMTREE |
b4e51854 | 2119 | select IRQ_DOMAIN |
8f9ca475 | 2120 | ---help--- |
3ef0e1f8 AS |
2121 | Add support for detecting the unique features of the OLPC |
2122 | XO hardware. | |
2123 | ||
a3128588 DD |
2124 | config OLPC_XO1_PM |
2125 | bool "OLPC XO-1 Power Management" | |
97c4cb71 | 2126 | depends on OLPC && MFD_CS5535 && PM_SLEEP |
a3128588 | 2127 | select MFD_CORE |
bf1ebf00 | 2128 | ---help--- |
97c4cb71 | 2129 | Add support for poweroff and suspend of the OLPC XO-1 laptop. |
bf1ebf00 | 2130 | |
cfee9597 DD |
2131 | config OLPC_XO1_RTC |
2132 | bool "OLPC XO-1 Real Time Clock" | |
2133 | depends on OLPC_XO1_PM && RTC_DRV_CMOS | |
2134 | ---help--- | |
2135 | Add support for the XO-1 real time clock, which can be used as a | |
2136 | programmable wakeup source. | |
2137 | ||
7feda8e9 DD |
2138 | config OLPC_XO1_SCI |
2139 | bool "OLPC XO-1 SCI extras" | |
d8d01a63 DD |
2140 | depends on OLPC && OLPC_XO1_PM |
2141 | select POWER_SUPPLY | |
7feda8e9 DD |
2142 | select GPIO_CS5535 |
2143 | select MFD_CORE | |
2144 | ---help--- | |
2145 | Add support for SCI-based features of the OLPC XO-1 laptop: | |
7bc74b3d | 2146 | - EC-driven system wakeups |
7feda8e9 | 2147 | - Power button |
7bc74b3d | 2148 | - Ebook switch |
2cf2baea | 2149 | - Lid switch |
e1040ac6 DD |
2150 | - AC adapter status updates |
2151 | - Battery status updates | |
7feda8e9 | 2152 | |
a0f30f59 DD |
2153 | config OLPC_XO15_SCI |
2154 | bool "OLPC XO-1.5 SCI extras" | |
d8d01a63 DD |
2155 | depends on OLPC && ACPI |
2156 | select POWER_SUPPLY | |
a0f30f59 DD |
2157 | ---help--- |
2158 | Add support for SCI-based features of the OLPC XO-1.5 laptop: | |
2159 | - EC-driven system wakeups | |
2160 | - AC adapter status updates | |
2161 | - Battery status updates | |
bf1ebf00 | 2162 | |
d4f3e350 EW |
2163 | config ALIX |
2164 | bool "PCEngines ALIX System Support (LED setup)" | |
2165 | select GPIOLIB | |
2166 | ---help--- | |
2167 | This option enables system support for the PCEngines ALIX. | |
2168 | At present this just sets up LEDs for GPIO control on | |
2169 | ALIX2/3/6 boards. However, other system specific setup should | |
2170 | get added here. | |
2171 | ||
2172 | Note: You must still enable the drivers for GPIO and LED support | |
2173 | (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs | |
2174 | ||
2175 | Note: You have to set alix.force=1 for boards with Award BIOS. | |
2176 | ||
da4e3302 PP |
2177 | config NET5501 |
2178 | bool "Soekris Engineering net5501 System Support (LEDS, GPIO, etc)" | |
2179 | select GPIOLIB | |
2180 | ---help--- | |
2181 | This option enables system support for the Soekris Engineering net5501. | |
2182 | ||
3197059a PP |
2183 | config GEOS |
2184 | bool "Traverse Technologies GEOS System Support (LEDS, GPIO, etc)" | |
2185 | select GPIOLIB | |
2186 | depends on DMI | |
2187 | ---help--- | |
2188 | This option enables system support for the Traverse Technologies GEOS. | |
2189 | ||
bc0120fd SR |
2190 | endif # X86_32 |
2191 | ||
23ac4ae8 | 2192 | config AMD_NB |
e279b6c1 | 2193 | def_bool y |
0e152cd7 | 2194 | depends on CPU_SUP_AMD && PCI |
e279b6c1 SR |
2195 | |
2196 | source "drivers/pcmcia/Kconfig" | |
2197 | ||
2198 | source "drivers/pci/hotplug/Kconfig" | |
2199 | ||
388b78ad AB |
2200 | config RAPIDIO |
2201 | bool "RapidIO support" | |
2202 | depends on PCI | |
2203 | default n | |
2204 | help | |
2205 | If you say Y here, the kernel will include drivers and | |
2206 | infrastructure code to support RapidIO interconnect devices. | |
2207 | ||
2208 | source "drivers/rapidio/Kconfig" | |
2209 | ||
e279b6c1 SR |
2210 | endmenu |
2211 | ||
2212 | ||
2213 | menu "Executable file formats / Emulations" | |
2214 | ||
2215 | source "fs/Kconfig.binfmt" | |
2216 | ||
2217 | config IA32_EMULATION | |
2218 | bool "IA32 Emulation" | |
2219 | depends on X86_64 | |
a97f52e6 | 2220 | select COMPAT_BINFMT_ELF |
af1839eb | 2221 | select HAVE_UID16 |
8f9ca475 | 2222 | ---help--- |
5fd92e65 L |
2223 | Include code to run legacy 32-bit programs under a |
2224 | 64-bit kernel. You should likely turn this on, unless you're | |
2225 | 100% sure that you don't have any 32-bit programs left. | |
e279b6c1 SR |
2226 | |
2227 | config IA32_AOUT | |
8f9ca475 IM |
2228 | tristate "IA32 a.out support" |
2229 | depends on IA32_EMULATION | |
2230 | ---help--- | |
2231 | Support old a.out binaries in the 32bit emulation. | |
e279b6c1 | 2232 | |
0bf62763 | 2233 | config X86_X32 |
5fd92e65 L |
2234 | bool "x32 ABI for 64-bit mode (EXPERIMENTAL)" |
2235 | depends on X86_64 && IA32_EMULATION && EXPERIMENTAL | |
2236 | ---help--- | |
2237 | Include code to run binaries for the x32 native 32-bit ABI | |
2238 | for 64-bit processors. An x32 process gets access to the | |
2239 | full 64-bit register file and wide data path while leaving | |
2240 | pointers at 32 bits for smaller memory footprint. | |
2241 | ||
2242 | You will need a recent binutils (2.22 or later) with | |
2243 | elf32_x86_64 support enabled to compile a kernel with this | |
2244 | option set. | |
2245 | ||
e279b6c1 | 2246 | config COMPAT |
3c2362e6 | 2247 | def_bool y |
0bf62763 | 2248 | depends on IA32_EMULATION || X86_X32 |
48b25c43 | 2249 | select ARCH_WANT_OLD_COMPAT_IPC |
e279b6c1 | 2250 | |
3120e25e | 2251 | if COMPAT |
e279b6c1 | 2252 | config COMPAT_FOR_U64_ALIGNMENT |
3120e25e | 2253 | def_bool y |
e279b6c1 SR |
2254 | |
2255 | config SYSVIPC_COMPAT | |
3c2362e6 | 2256 | def_bool y |
3120e25e | 2257 | depends on SYSVIPC |
e279b6c1 | 2258 | |
ee009e4a | 2259 | config KEYS_COMPAT |
3120e25e JB |
2260 | def_bool y |
2261 | depends on KEYS | |
2262 | endif | |
ee009e4a | 2263 | |
e279b6c1 SR |
2264 | endmenu |
2265 | ||
2266 | ||
e5beae16 KP |
2267 | config HAVE_ATOMIC_IOMAP |
2268 | def_bool y | |
2269 | depends on X86_32 | |
2270 | ||
3cba11d3 MH |
2271 | config HAVE_TEXT_POKE_SMP |
2272 | bool | |
2273 | select STOP_MACHINE if SMP | |
2274 | ||
4692d77f AR |
2275 | config X86_DEV_DMA_OPS |
2276 | bool | |
83125a3a | 2277 | depends on X86_64 || STA2X11 |
4692d77f | 2278 | |
f7219a53 AR |
2279 | config X86_DMA_REMAP |
2280 | bool | |
83125a3a | 2281 | depends on STA2X11 |
f7219a53 | 2282 | |
e279b6c1 SR |
2283 | source "net/Kconfig" |
2284 | ||
2285 | source "drivers/Kconfig" | |
2286 | ||
2287 | source "drivers/firmware/Kconfig" | |
2288 | ||
2289 | source "fs/Kconfig" | |
2290 | ||
e279b6c1 SR |
2291 | source "arch/x86/Kconfig.debug" |
2292 | ||
2293 | source "security/Kconfig" | |
2294 | ||
2295 | source "crypto/Kconfig" | |
2296 | ||
edf88417 AK |
2297 | source "arch/x86/kvm/Kconfig" |
2298 | ||
e279b6c1 | 2299 | source "lib/Kconfig" |