diff options
author | Sam Ravnborg <sam@ravnborg.org> | 2007-10-25 15:04:16 -0400 |
---|---|---|
committer | Sam Ravnborg <sam@ravnborg.org> | 2007-10-25 16:37:02 -0400 |
commit | 47572387d58a9584c60ebbbdee56fc92c627f16f (patch) | |
tree | 04ac61fdc84b080dac72c30a06cee449b6c3e847 /arch/x86_64/Kconfig | |
parent | e703f75d620824739148142c3734ae8223e4d1f5 (diff) |
x86: move i386 and x86_64 Kconfig files to x86 directory
After a small change in kconfig Makefile we could
move all x86 Kconfig files to x86 directory.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'arch/x86_64/Kconfig')
-rw-r--r-- | arch/x86_64/Kconfig | 844 |
1 files changed, 0 insertions, 844 deletions
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig deleted file mode 100644 index e2542e5b536c..000000000000 --- a/arch/x86_64/Kconfig +++ /dev/null | |||
@@ -1,844 +0,0 @@ | |||
1 | # | ||
2 | # For a description of the syntax of this configuration file, | ||
3 | # see Documentation/kbuild/kconfig-language.txt. | ||
4 | # | ||
5 | # Note: ISA is disabled and will hopefully never be enabled. | ||
6 | # If you managed to buy an ISA x86-64 box you'll have to fix all the | ||
7 | # ISA drivers you need yourself. | ||
8 | # | ||
9 | |||
10 | mainmenu "Linux Kernel Configuration" | ||
11 | |||
12 | config X86_64 | ||
13 | bool | ||
14 | default y | ||
15 | help | ||
16 | Port to the x86-64 architecture. x86-64 is a 64-bit extension to the | ||
17 | classical 32-bit x86 architecture. For details see | ||
18 | <http://www.x86-64.org/>. | ||
19 | |||
20 | config 64BIT | ||
21 | def_bool y | ||
22 | |||
23 | config X86 | ||
24 | bool | ||
25 | default y | ||
26 | |||
27 | config GENERIC_TIME | ||
28 | bool | ||
29 | default y | ||
30 | |||
31 | config GENERIC_TIME_VSYSCALL | ||
32 | bool | ||
33 | default y | ||
34 | |||
35 | config GENERIC_CMOS_UPDATE | ||
36 | bool | ||
37 | default y | ||
38 | |||
39 | config CLOCKSOURCE_WATCHDOG | ||
40 | bool | ||
41 | default y | ||
42 | |||
43 | config GENERIC_CLOCKEVENTS | ||
44 | bool | ||
45 | default y | ||
46 | |||
47 | config GENERIC_CLOCKEVENTS_BROADCAST | ||
48 | bool | ||
49 | default y | ||
50 | |||
51 | config ZONE_DMA32 | ||
52 | bool | ||
53 | default y | ||
54 | |||
55 | config LOCKDEP_SUPPORT | ||
56 | bool | ||
57 | default y | ||
58 | |||
59 | config STACKTRACE_SUPPORT | ||
60 | bool | ||
61 | default y | ||
62 | |||
63 | config SEMAPHORE_SLEEPERS | ||
64 | bool | ||
65 | default y | ||
66 | |||
67 | config MMU | ||
68 | bool | ||
69 | default y | ||
70 | |||
71 | config ZONE_DMA | ||
72 | bool | ||
73 | default y | ||
74 | |||
75 | config ISA | ||
76 | bool | ||
77 | |||
78 | config SBUS | ||
79 | bool | ||
80 | |||
81 | config RWSEM_GENERIC_SPINLOCK | ||
82 | bool | ||
83 | default y | ||
84 | |||
85 | config RWSEM_XCHGADD_ALGORITHM | ||
86 | bool | ||
87 | |||
88 | config GENERIC_HWEIGHT | ||
89 | bool | ||
90 | default y | ||
91 | |||
92 | config GENERIC_CALIBRATE_DELAY | ||
93 | bool | ||
94 | default y | ||
95 | |||
96 | config X86_CMPXCHG | ||
97 | bool | ||
98 | default y | ||
99 | |||
100 | config EARLY_PRINTK | ||
101 | bool | ||
102 | default y | ||
103 | |||
104 | config GENERIC_ISA_DMA | ||
105 | bool | ||
106 | default y | ||
107 | |||
108 | config GENERIC_IOMAP | ||
109 | bool | ||
110 | default y | ||
111 | |||
112 | config ARCH_MAY_HAVE_PC_FDC | ||
113 | bool | ||
114 | default y | ||
115 | |||
116 | config ARCH_POPULATES_NODE_MAP | ||
117 | def_bool y | ||
118 | |||
119 | config DMI | ||
120 | bool | ||
121 | default y | ||
122 | |||
123 | config AUDIT_ARCH | ||
124 | bool | ||
125 | default y | ||
126 | |||
127 | config GENERIC_BUG | ||
128 | bool | ||
129 | default y | ||
130 | depends on BUG | ||
131 | |||
132 | config ARCH_HAS_ILOG2_U32 | ||
133 | bool | ||
134 | default n | ||
135 | |||
136 | config ARCH_HAS_ILOG2_U64 | ||
137 | bool | ||
138 | default n | ||
139 | |||
140 | source "init/Kconfig" | ||
141 | |||
142 | |||
143 | menu "Processor type and features" | ||
144 | |||
145 | source "kernel/time/Kconfig" | ||
146 | |||
147 | choice | ||
148 | prompt "Subarchitecture Type" | ||
149 | default X86_PC | ||
150 | |||
151 | config X86_PC | ||
152 | bool "PC-compatible" | ||
153 | help | ||
154 | Choose this option if your computer is a standard PC or compatible. | ||
155 | |||
156 | config X86_VSMP | ||
157 | bool "Support for ScaleMP vSMP" | ||
158 | depends on PCI | ||
159 | help | ||
160 | Support for ScaleMP vSMP systems. Say 'Y' here if this kernel is | ||
161 | supposed to run on these EM64T-based machines. Only choose this option | ||
162 | if you have one of these machines. | ||
163 | |||
164 | endchoice | ||
165 | |||
166 | choice | ||
167 | prompt "Processor family" | ||
168 | default GENERIC_CPU | ||
169 | |||
170 | config MK8 | ||
171 | bool "AMD-Opteron/Athlon64" | ||
172 | help | ||
173 | Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs. | ||
174 | |||
175 | config MPSC | ||
176 | bool "Intel P4 / older Netburst based Xeon" | ||
177 | help | ||
178 | Optimize for Intel Pentium 4, Pentium D and older Nocona/Dempsey | ||
179 | Xeon CPUs with Intel 64bit which is compatible with x86-64. | ||
180 | Note that the latest Xeons (Xeon 51xx and 53xx) are not based on the | ||
181 | Netburst core and shouldn't use this option. You can distinguish them | ||
182 | using the cpu family field | ||
183 | in /proc/cpuinfo. Family 15 is an older Xeon, Family 6 a newer one. | ||
184 | |||
185 | config MCORE2 | ||
186 | bool "Intel Core2 / newer Xeon" | ||
187 | help | ||
188 | Optimize for Intel Core2 and newer Xeons (51xx) | ||
189 | You can distinguish the newer Xeons from the older ones using | ||
190 | the cpu family field in /proc/cpuinfo. 15 is an older Xeon | ||
191 | (use CONFIG_MPSC then), 6 is a newer one. | ||
192 | |||
193 | config GENERIC_CPU | ||
194 | bool "Generic-x86-64" | ||
195 | help | ||
196 | Generic x86-64 CPU. | ||
197 | Run equally well on all x86-64 CPUs. | ||
198 | |||
199 | endchoice | ||
200 | |||
201 | # | ||
202 | # Define implied options from the CPU selection here | ||
203 | # | ||
204 | config X86_L1_CACHE_BYTES | ||
205 | int | ||
206 | default "128" if GENERIC_CPU || MPSC | ||
207 | default "64" if MK8 || MCORE2 | ||
208 | |||
209 | config X86_L1_CACHE_SHIFT | ||
210 | int | ||
211 | default "7" if GENERIC_CPU || MPSC | ||
212 | default "6" if MK8 || MCORE2 | ||
213 | |||
214 | config X86_INTERNODE_CACHE_BYTES | ||
215 | int | ||
216 | default "4096" if X86_VSMP | ||
217 | default X86_L1_CACHE_BYTES if !X86_VSMP | ||
218 | |||
219 | config X86_TSC | ||
220 | bool | ||
221 | default y | ||
222 | |||
223 | config X86_GOOD_APIC | ||
224 | bool | ||
225 | default y | ||
226 | |||
227 | config MICROCODE | ||
228 | tristate "/dev/cpu/microcode - Intel CPU microcode support" | ||
229 | select FW_LOADER | ||
230 | ---help--- | ||
231 | If you say Y here the 'File systems' section, you will be | ||
232 | able to update the microcode on Intel processors. You will | ||
233 | obviously need the actual microcode binary data itself which is | ||
234 | not shipped with the Linux kernel. | ||
235 | |||
236 | For latest news and information on obtaining all the required | ||
237 | ingredients for this driver, check: | ||
238 | <http://www.urbanmyth.org/microcode/>. | ||
239 | |||
240 | To compile this driver as a module, choose M here: the | ||
241 | module will be called microcode. | ||
242 | If you use modprobe or kmod you may also want to add the line | ||
243 | 'alias char-major-10-184 microcode' to your /etc/modules.conf file. | ||
244 | |||
245 | config MICROCODE_OLD_INTERFACE | ||
246 | bool | ||
247 | depends on MICROCODE | ||
248 | default y | ||
249 | |||
250 | config X86_MSR | ||
251 | tristate "/dev/cpu/*/msr - Model-specific register support" | ||
252 | help | ||
253 | This device gives privileged processes access to the x86 | ||
254 | Model-Specific Registers (MSRs). It is a character device with | ||
255 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. | ||
256 | MSR accesses are directed to a specific CPU on multi-processor | ||
257 | systems. | ||
258 | |||
259 | config X86_CPUID | ||
260 | tristate "/dev/cpu/*/cpuid - CPU information support" | ||
261 | help | ||
262 | This device gives processes access to the x86 CPUID instruction to | ||
263 | be executed on a specific processor. It is a character device | ||
264 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to | ||
265 | /dev/cpu/31/cpuid. | ||
266 | |||
267 | config X86_HT | ||
268 | bool | ||
269 | depends on SMP && !MK8 | ||
270 | default y | ||
271 | |||
272 | config MATH_EMULATION | ||
273 | bool | ||
274 | |||
275 | config MCA | ||
276 | bool | ||
277 | |||
278 | config EISA | ||
279 | bool | ||
280 | |||
281 | config X86_IO_APIC | ||
282 | bool | ||
283 | default y | ||
284 | |||
285 | config X86_LOCAL_APIC | ||
286 | bool | ||
287 | default y | ||
288 | |||
289 | config MTRR | ||
290 | bool "MTRR (Memory Type Range Register) support" | ||
291 | ---help--- | ||
292 | On Intel P6 family processors (Pentium Pro, Pentium II and later) | ||
293 | the Memory Type Range Registers (MTRRs) may be used to control | ||
294 | processor access to memory ranges. This is most useful if you have | ||
295 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining | ||
296 | allows bus write transfers to be combined into a larger transfer | ||
297 | before bursting over the PCI/AGP bus. This can increase performance | ||
298 | of image write operations 2.5 times or more. Saying Y here creates a | ||
299 | /proc/mtrr file which may be used to manipulate your processor's | ||
300 | MTRRs. Typically the X server should use this. | ||
301 | |||
302 | This code has a reasonably generic interface so that similar | ||
303 | control registers on other processors can be easily supported | ||
304 | as well. | ||
305 | |||
306 | Saying Y here also fixes a problem with buggy SMP BIOSes which only | ||
307 | set the MTRRs for the boot CPU and not for the secondary CPUs. This | ||
308 | can lead to all sorts of problems, so it's good to say Y here. | ||
309 | |||
310 | Just say Y here, all x86-64 machines support MTRRs. | ||
311 | |||
312 | See <file:Documentation/mtrr.txt> for more information. | ||
313 | |||
314 | config SMP | ||
315 | bool "Symmetric multi-processing support" | ||
316 | ---help--- | ||
317 | This enables support for systems with more than one CPU. If you have | ||
318 | a system with only one CPU, like most personal computers, say N. If | ||
319 | you have a system with more than one CPU, say Y. | ||
320 | |||
321 | If you say N here, the kernel will run on single and multiprocessor | ||
322 | machines, but will use only one CPU of a multiprocessor machine. If | ||
323 | you say Y here, the kernel will run on many, but not all, | ||
324 | singleprocessor machines. On a singleprocessor machine, the kernel | ||
325 | will run faster if you say N here. | ||
326 | |||
327 | If you don't know what to do here, say N. | ||
328 | |||
329 | config SCHED_SMT | ||
330 | bool "SMT (Hyperthreading) scheduler support" | ||
331 | depends on SMP | ||
332 | default n | ||
333 | help | ||
334 | SMT scheduler support improves the CPU scheduler's decision making | ||
335 | when dealing with Intel Pentium 4 chips with HyperThreading at a | ||
336 | cost of slightly increased overhead in some places. If unsure say | ||
337 | N here. | ||
338 | |||
339 | config SCHED_MC | ||
340 | bool "Multi-core scheduler support" | ||
341 | depends on SMP | ||
342 | default y | ||
343 | help | ||
344 | Multi-core scheduler support improves the CPU scheduler's decision | ||
345 | making when dealing with multi-core CPU chips at a cost of slightly | ||
346 | increased overhead in some places. If unsure say N here. | ||
347 | |||
348 | source "kernel/Kconfig.preempt" | ||
349 | |||
350 | config NUMA | ||
351 | bool "Non Uniform Memory Access (NUMA) Support" | ||
352 | depends on SMP | ||
353 | help | ||
354 | Enable NUMA (Non Uniform Memory Access) support. The kernel | ||
355 | will try to allocate memory used by a CPU on the local memory | ||
356 | controller of the CPU and add some more NUMA awareness to the kernel. | ||
357 | This code is recommended on all multiprocessor Opteron systems. | ||
358 | If the system is EM64T, you should say N unless your system is EM64T | ||
359 | NUMA. | ||
360 | |||
361 | config K8_NUMA | ||
362 | bool "Old style AMD Opteron NUMA detection" | ||
363 | depends on NUMA && PCI | ||
364 | default y | ||
365 | help | ||
366 | Enable K8 NUMA node topology detection. You should say Y here if | ||
367 | you have a multi processor AMD K8 system. This uses an old | ||
368 | method to read the NUMA configuration directly from the builtin | ||
369 | Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA | ||
370 | instead, which also takes priority if both are compiled in. | ||
371 | |||
372 | config NODES_SHIFT | ||
373 | int | ||
374 | default "6" | ||
375 | depends on NEED_MULTIPLE_NODES | ||
376 | |||
377 | # Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig. | ||
378 | |||
379 | config X86_64_ACPI_NUMA | ||
380 | bool "ACPI NUMA detection" | ||
381 | depends on NUMA | ||
382 | select ACPI | ||
383 | select PCI | ||
384 | select ACPI_NUMA | ||
385 | default y | ||
386 | help | ||
387 | Enable ACPI SRAT based node topology detection. | ||
388 | |||
389 | config NUMA_EMU | ||
390 | bool "NUMA emulation" | ||
391 | depends on NUMA | ||
392 | help | ||
393 | Enable NUMA emulation. A flat machine will be split | ||
394 | into virtual nodes when booted with "numa=fake=N", where N is the | ||
395 | number of nodes. This is only useful for debugging. | ||
396 | |||
397 | config ARCH_DISCONTIGMEM_ENABLE | ||
398 | bool | ||
399 | depends on NUMA | ||
400 | default y | ||
401 | |||
402 | config ARCH_DISCONTIGMEM_DEFAULT | ||
403 | def_bool y | ||
404 | depends on NUMA | ||
405 | |||
406 | config ARCH_SPARSEMEM_ENABLE | ||
407 | def_bool y | ||
408 | depends on (NUMA || EXPERIMENTAL) | ||
409 | select SPARSEMEM_VMEMMAP_ENABLE | ||
410 | |||
411 | config ARCH_MEMORY_PROBE | ||
412 | def_bool y | ||
413 | depends on MEMORY_HOTPLUG | ||
414 | |||
415 | config ARCH_FLATMEM_ENABLE | ||
416 | def_bool y | ||
417 | depends on !NUMA | ||
418 | |||
419 | source "mm/Kconfig" | ||
420 | |||
421 | config MEMORY_HOTPLUG_RESERVE | ||
422 | def_bool y | ||
423 | depends on (MEMORY_HOTPLUG && DISCONTIGMEM) | ||
424 | |||
425 | config HAVE_ARCH_EARLY_PFN_TO_NID | ||
426 | def_bool y | ||
427 | depends on NUMA | ||
428 | |||
429 | config OUT_OF_LINE_PFN_TO_PAGE | ||
430 | def_bool y | ||
431 | depends on DISCONTIGMEM | ||
432 | |||
433 | config NR_CPUS | ||
434 | int "Maximum number of CPUs (2-255)" | ||
435 | range 2 255 | ||
436 | depends on SMP | ||
437 | default "8" | ||
438 | help | ||
439 | This allows you to specify the maximum number of CPUs which this | ||
440 | kernel will support. Current maximum is 255 CPUs due to | ||
441 | APIC addressing limits. Less depending on the hardware. | ||
442 | |||
443 | This is purely to save memory - each supported CPU requires | ||
444 | memory in the static kernel configuration. | ||
445 | |||
446 | config PHYSICAL_ALIGN | ||
447 | hex | ||
448 | default "0x200000" | ||
449 | |||
450 | config HOTPLUG_CPU | ||
451 | bool "Support for suspend on SMP and hot-pluggable CPUs (EXPERIMENTAL)" | ||
452 | depends on SMP && HOTPLUG && EXPERIMENTAL | ||
453 | help | ||
454 | Say Y here to experiment with turning CPUs off and on. CPUs | ||
455 | can be controlled through /sys/devices/system/cpu/cpu#. | ||
456 | This is also required for suspend/hibernation on SMP systems. | ||
457 | |||
458 | Say N if you want to disable CPU hotplug and don't need to | ||
459 | suspend. | ||
460 | |||
461 | config ARCH_ENABLE_MEMORY_HOTPLUG | ||
462 | def_bool y | ||
463 | |||
464 | config HPET_TIMER | ||
465 | bool | ||
466 | default y | ||
467 | help | ||
468 | Use the IA-PC HPET (High Precision Event Timer) to manage | ||
469 | time in preference to the PIT and RTC, if a HPET is | ||
470 | present. The HPET provides a stable time base on SMP | ||
471 | systems, unlike the TSC, but it is more expensive to access, | ||
472 | as it is off-chip. You can find the HPET spec at | ||
473 | <http://www.intel.com/hardwaredesign/hpetspec.htm>. | ||
474 | |||
475 | config HPET_EMULATE_RTC | ||
476 | bool | ||
477 | depends on HPET_TIMER && RTC=y | ||
478 | default y | ||
479 | |||
480 | # Mark as embedded because too many people got it wrong. | ||
481 | # The code disables itself when not needed. | ||
482 | config IOMMU | ||
483 | bool "IOMMU support" if EMBEDDED | ||
484 | default y | ||
485 | select SWIOTLB | ||
486 | select AGP | ||
487 | depends on PCI | ||
488 | help | ||
489 | Support for full DMA access of devices with 32bit memory access only | ||
490 | on systems with more than 3GB. This is usually needed for USB, | ||
491 | sound, many IDE/SATA chipsets and some other devices. | ||
492 | Provides a driver for the AMD Athlon64/Opteron/Turion/Sempron GART | ||
493 | based hardware IOMMU and a software bounce buffer based IOMMU used | ||
494 | on Intel systems and as fallback. | ||
495 | The code is only active when needed (enough memory and limited | ||
496 | device) unless CONFIG_IOMMU_DEBUG or iommu=force is specified | ||
497 | too. | ||
498 | |||
499 | config CALGARY_IOMMU | ||
500 | bool "IBM Calgary IOMMU support" | ||
501 | select SWIOTLB | ||
502 | depends on PCI && EXPERIMENTAL | ||
503 | help | ||
504 | Support for hardware IOMMUs in IBM's xSeries x366 and x460 | ||
505 | systems. Needed to run systems with more than 3GB of memory | ||
506 | properly with 32-bit PCI devices that do not support DAC | ||
507 | (Double Address Cycle). Calgary also supports bus level | ||
508 | isolation, where all DMAs pass through the IOMMU. This | ||
509 | prevents them from going anywhere except their intended | ||
510 | destination. This catches hard-to-find kernel bugs and | ||
511 | mis-behaving drivers and devices that do not use the DMA-API | ||
512 | properly to set up their DMA buffers. The IOMMU can be | ||
513 | turned off at boot time with the iommu=off parameter. | ||
514 | Normally the kernel will make the right choice by itself. | ||
515 | If unsure, say Y. | ||
516 | |||
517 | config CALGARY_IOMMU_ENABLED_BY_DEFAULT | ||
518 | bool "Should Calgary be enabled by default?" | ||
519 | default y | ||
520 | depends on CALGARY_IOMMU | ||
521 | help | ||
522 | Should Calgary be enabled by default? if you choose 'y', Calgary | ||
523 | will be used (if it exists). If you choose 'n', Calgary will not be | ||
524 | used even if it exists. If you choose 'n' and would like to use | ||
525 | Calgary anyway, pass 'iommu=calgary' on the kernel command line. | ||
526 | If unsure, say Y. | ||
527 | |||
528 | # need this always selected by IOMMU for the VIA workaround | ||
529 | config SWIOTLB | ||
530 | bool | ||
531 | help | ||
532 | Support for software bounce buffers used on x86-64 systems | ||
533 | which don't have a hardware IOMMU (e.g. the current generation | ||
534 | of Intel's x86-64 CPUs). Using this PCI devices which can only | ||
535 | access 32-bits of memory can be used on systems with more than | ||
536 | 3 GB of memory. If unsure, say Y. | ||
537 | |||
538 | config X86_MCE | ||
539 | bool "Machine check support" if EMBEDDED | ||
540 | default y | ||
541 | help | ||
542 | Include a machine check error handler to report hardware errors. | ||
543 | This version will require the mcelog utility to decode some | ||
544 | machine check error logs. See | ||
545 | ftp://ftp.x86-64.org/pub/linux/tools/mcelog | ||
546 | |||
547 | config X86_MCE_INTEL | ||
548 | bool "Intel MCE features" | ||
549 | depends on X86_MCE && X86_LOCAL_APIC | ||
550 | default y | ||
551 | help | ||
552 | Additional support for intel specific MCE features such as | ||
553 | the thermal monitor. | ||
554 | |||
555 | config X86_MCE_AMD | ||
556 | bool "AMD MCE features" | ||
557 | depends on X86_MCE && X86_LOCAL_APIC | ||
558 | default y | ||
559 | help | ||
560 | Additional support for AMD specific MCE features such as | ||
561 | the DRAM Error Threshold. | ||
562 | |||
563 | config KEXEC | ||
564 | bool "kexec system call" | ||
565 | help | ||
566 | kexec is a system call that implements the ability to shutdown your | ||
567 | current kernel, and to start another kernel. It is like a reboot | ||
568 | but it is independent of the system firmware. And like a reboot | ||
569 | you can start any kernel with it, not just Linux. | ||
570 | |||
571 | The name comes from the similarity to the exec system call. | ||
572 | |||
573 | It is an ongoing process to be certain the hardware in a machine | ||
574 | is properly shutdown, so do not be surprised if this code does not | ||
575 | initially work for you. It may help to enable device hotplugging | ||
576 | support. As of this writing the exact hardware interface is | ||
577 | strongly in flux, so no good recommendation can be made. | ||
578 | |||
579 | config CRASH_DUMP | ||
580 | bool "kernel crash dumps (EXPERIMENTAL)" | ||
581 | depends on EXPERIMENTAL | ||
582 | help | ||
583 | Generate crash dump after being started by kexec. | ||
584 | This should be normally only set in special crash dump kernels | ||
585 | which are loaded in the main kernel with kexec-tools into | ||
586 | a specially reserved region and then later executed after | ||
587 | a crash by kdump/kexec. The crash dump kernel must be compiled | ||
588 | to a memory address not used by the main kernel or BIOS using | ||
589 | PHYSICAL_START, or it must be built as a relocatable image | ||
590 | (CONFIG_RELOCATABLE=y). | ||
591 | For more details see Documentation/kdump/kdump.txt | ||
592 | |||
593 | config RELOCATABLE | ||
594 | bool "Build a relocatable kernel (EXPERIMENTAL)" | ||
595 | depends on EXPERIMENTAL | ||
596 | help | ||
597 | Builds a relocatable kernel. This enables loading and running | ||
598 | a kernel binary from a different physical address than it has | ||
599 | been compiled for. | ||
600 | |||
601 | One use is for the kexec on panic case where the recovery kernel | ||
602 | must live at a different physical address than the primary | ||
603 | kernel. | ||
604 | |||
605 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | ||
606 | it has been loaded at and the compile time physical address | ||
607 | (CONFIG_PHYSICAL_START) is ignored. | ||
608 | |||
609 | config PHYSICAL_START | ||
610 | hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) | ||
611 | default "0x200000" | ||
612 | help | ||
613 | This gives the physical address where the kernel is loaded. It | ||
614 | should be aligned to 2MB boundary. | ||
615 | |||
616 | If kernel is a not relocatable (CONFIG_RELOCATABLE=n) then | ||
617 | bzImage will decompress itself to above physical address and | ||
618 | run from there. Otherwise, bzImage will run from the address where | ||
619 | it has been loaded by the boot loader and will ignore above physical | ||
620 | address. | ||
621 | |||
622 | In normal kdump cases one does not have to set/change this option | ||
623 | as now bzImage can be compiled as a completely relocatable image | ||
624 | (CONFIG_RELOCATABLE=y) and be used to load and run from a different | ||
625 | address. This option is mainly useful for the folks who don't want | ||
626 | to use a bzImage for capturing the crash dump and want to use a | ||
627 | vmlinux instead. | ||
628 | |||
629 | So if you are using bzImage for capturing the crash dump, leave | ||
630 | the value here unchanged to 0x200000 and set CONFIG_RELOCATABLE=y. | ||
631 | Otherwise if you plan to use vmlinux for capturing the crash dump | ||
632 | change this value to start of the reserved region (Typically 16MB | ||
633 | 0x1000000). In other words, it can be set based on the "X" value as | ||
634 | specified in the "crashkernel=YM@XM" command line boot parameter | ||
635 | passed to the panic-ed kernel. Typically this parameter is set as | ||
636 | crashkernel=64M@16M. Please take a look at | ||
637 | Documentation/kdump/kdump.txt for more details about crash dumps. | ||
638 | |||
639 | Usage of bzImage for capturing the crash dump is advantageous as | ||
640 | one does not have to build two kernels. Same kernel can be used | ||
641 | as production kernel and capture kernel. | ||
642 | |||
643 | Don't change this unless you know what you are doing. | ||
644 | |||
645 | config SECCOMP | ||
646 | bool "Enable seccomp to safely compute untrusted bytecode" | ||
647 | depends on PROC_FS | ||
648 | default y | ||
649 | help | ||
650 | This kernel feature is useful for number crunching applications | ||
651 | that may need to compute untrusted bytecode during their | ||
652 | execution. By using pipes or other transports made available to | ||
653 | the process as file descriptors supporting the read/write | ||
654 | syscalls, it's possible to isolate those applications in | ||
655 | their own address space using seccomp. Once seccomp is | ||
656 | enabled via /proc/<pid>/seccomp, it cannot be disabled | ||
657 | and the task is only allowed to execute a few safe syscalls | ||
658 | defined by each seccomp mode. | ||
659 | |||
660 | If unsure, say Y. Only embedded should say N here. | ||
661 | |||
662 | config CC_STACKPROTECTOR | ||
663 | bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" | ||
664 | depends on EXPERIMENTAL | ||
665 | help | ||
666 | This option turns on the -fstack-protector GCC feature. This | ||
667 | feature puts, at the beginning of critical functions, a canary | ||
668 | value on the stack just before the return address, and validates | ||
669 | the value just before actually returning. Stack based buffer | ||
670 | overflows (that need to overwrite this return address) now also | ||
671 | overwrite the canary, which gets detected and the attack is then | ||
672 | neutralized via a kernel panic. | ||
673 | |||
674 | This feature requires gcc version 4.2 or above, or a distribution | ||
675 | gcc with the feature backported. Older versions are automatically | ||
676 | detected and for those versions, this configuration option is ignored. | ||
677 | |||
678 | config CC_STACKPROTECTOR_ALL | ||
679 | bool "Use stack-protector for all functions" | ||
680 | depends on CC_STACKPROTECTOR | ||
681 | help | ||
682 | Normally, GCC only inserts the canary value protection for | ||
683 | functions that use large-ish on-stack buffers. By enabling | ||
684 | this option, GCC will be asked to do this for ALL functions. | ||
685 | |||
686 | source kernel/Kconfig.hz | ||
687 | |||
688 | config K8_NB | ||
689 | def_bool y | ||
690 | depends on AGP_AMD64 || IOMMU || (PCI && NUMA) | ||
691 | |||
692 | endmenu | ||
693 | |||
694 | # | ||
695 | # Use the generic interrupt handling code in kernel/irq/: | ||
696 | # | ||
697 | config GENERIC_HARDIRQS | ||
698 | bool | ||
699 | default y | ||
700 | |||
701 | config GENERIC_IRQ_PROBE | ||
702 | bool | ||
703 | default y | ||
704 | |||
705 | # we have no ISA slots, but we do have ISA-style DMA. | ||
706 | config ISA_DMA_API | ||
707 | bool | ||
708 | default y | ||
709 | |||
710 | config GENERIC_PENDING_IRQ | ||
711 | bool | ||
712 | depends on GENERIC_HARDIRQS && SMP | ||
713 | default y | ||
714 | |||
715 | menu "Power management options" | ||
716 | |||
717 | source kernel/power/Kconfig | ||
718 | |||
719 | config ARCH_HIBERNATION_HEADER | ||
720 | bool | ||
721 | depends on HIBERNATION | ||
722 | default y | ||
723 | |||
724 | source "drivers/acpi/Kconfig" | ||
725 | |||
726 | source "arch/x86/kernel/cpu/cpufreq/Kconfig_64" | ||
727 | |||
728 | source "drivers/cpuidle/Kconfig" | ||
729 | |||
730 | endmenu | ||
731 | |||
732 | menu "Bus options (PCI etc.)" | ||
733 | |||
734 | config PCI | ||
735 | bool "PCI support" | ||
736 | select ARCH_SUPPORTS_MSI if (X86_LOCAL_APIC && X86_IO_APIC) | ||
737 | |||
738 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. | ||
739 | config PCI_DIRECT | ||
740 | bool | ||
741 | depends on PCI | ||
742 | default y | ||
743 | |||
744 | config PCI_MMCONFIG | ||
745 | bool "Support mmconfig PCI config space access" | ||
746 | depends on PCI && ACPI | ||
747 | |||
748 | config PCI_DOMAINS | ||
749 | bool | ||
750 | depends on PCI | ||
751 | default y | ||
752 | |||
753 | config DMAR | ||
754 | bool "Support for DMA Remapping Devices (EXPERIMENTAL)" | ||
755 | depends on PCI_MSI && ACPI && EXPERIMENTAL | ||
756 | default y | ||
757 | help | ||
758 | DMA remapping (DMAR) devices support enables independent address | ||
759 | translations for Direct Memory Access (DMA) from devices. | ||
760 | These DMA remapping devices are reported via ACPI tables | ||
761 | and include PCI device scope covered by these DMA | ||
762 | remapping devices. | ||
763 | |||
764 | config DMAR_GFX_WA | ||
765 | bool "Support for Graphics workaround" | ||
766 | depends on DMAR | ||
767 | default y | ||
768 | help | ||
769 | Current Graphics drivers tend to use physical address | ||
770 | for DMA and avoid using DMA APIs. Setting this config | ||
771 | option permits the IOMMU driver to set a unity map for | ||
772 | all the OS-visible memory. Hence the driver can continue | ||
773 | to use physical addresses for DMA. | ||
774 | |||
775 | config DMAR_FLOPPY_WA | ||
776 | bool | ||
777 | depends on DMAR | ||
778 | default y | ||
779 | help | ||
780 | Floppy disk drivers are know to bypass DMA API calls | ||
781 | thereby failing to work when IOMMU is enabled. This | ||
782 | workaround will setup a 1:1 mapping for the first | ||
783 | 16M to make floppy (an ISA device) work. | ||
784 | |||
785 | source "drivers/pci/pcie/Kconfig" | ||
786 | |||
787 | source "drivers/pci/Kconfig" | ||
788 | |||
789 | source "drivers/pcmcia/Kconfig" | ||
790 | |||
791 | source "drivers/pci/hotplug/Kconfig" | ||
792 | |||
793 | endmenu | ||
794 | |||
795 | |||
796 | menu "Executable file formats / Emulations" | ||
797 | |||
798 | source "fs/Kconfig.binfmt" | ||
799 | |||
800 | config IA32_EMULATION | ||
801 | bool "IA32 Emulation" | ||
802 | help | ||
803 | Include code to run 32-bit programs under a 64-bit kernel. You should | ||
804 | likely turn this on, unless you're 100% sure that you don't have any | ||
805 | 32-bit programs left. | ||
806 | |||
807 | config IA32_AOUT | ||
808 | tristate "IA32 a.out support" | ||
809 | depends on IA32_EMULATION | ||
810 | help | ||
811 | Support old a.out binaries in the 32bit emulation. | ||
812 | |||
813 | config COMPAT | ||
814 | bool | ||
815 | depends on IA32_EMULATION | ||
816 | default y | ||
817 | |||
818 | config COMPAT_FOR_U64_ALIGNMENT | ||
819 | def_bool COMPAT | ||
820 | |||
821 | config SYSVIPC_COMPAT | ||
822 | bool | ||
823 | depends on COMPAT && SYSVIPC | ||
824 | default y | ||
825 | |||
826 | endmenu | ||
827 | |||
828 | source "net/Kconfig" | ||
829 | |||
830 | source drivers/Kconfig | ||
831 | |||
832 | source "drivers/firmware/Kconfig" | ||
833 | |||
834 | source fs/Kconfig | ||
835 | |||
836 | source "kernel/Kconfig.instrumentation" | ||
837 | |||
838 | source "arch/x86/Kconfig.debug" | ||
839 | |||
840 | source "security/Kconfig" | ||
841 | |||
842 | source "crypto/Kconfig" | ||
843 | |||
844 | source "lib/Kconfig" | ||