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1da177e4 LT |
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 | ||
52fdd089 BL |
27 | config SEMAPHORE_SLEEPERS |
28 | bool | |
29 | default y | |
30 | ||
1da177e4 LT |
31 | config MMU |
32 | bool | |
33 | default y | |
34 | ||
35 | config ISA | |
36 | bool | |
37 | ||
38 | config SBUS | |
39 | bool | |
40 | ||
41 | config RWSEM_GENERIC_SPINLOCK | |
42 | bool | |
43 | default y | |
44 | ||
45 | config RWSEM_XCHGADD_ALGORITHM | |
46 | bool | |
47 | ||
48 | config GENERIC_CALIBRATE_DELAY | |
49 | bool | |
50 | default y | |
51 | ||
52 | config X86_CMPXCHG | |
53 | bool | |
54 | default y | |
55 | ||
56 | config EARLY_PRINTK | |
57 | bool | |
58 | default y | |
59 | ||
60 | config GENERIC_ISA_DMA | |
61 | bool | |
62 | default y | |
63 | ||
64 | config GENERIC_IOMAP | |
65 | bool | |
66 | default y | |
67 | ||
a08b6b79 Z |
68 | config ARCH_MAY_HAVE_PC_FDC |
69 | bool | |
70 | default y | |
71 | ||
1da177e4 LT |
72 | source "init/Kconfig" |
73 | ||
74 | ||
75 | menu "Processor type and features" | |
76 | ||
77 | choice | |
78 | prompt "Processor family" | |
79 | default MK8 | |
80 | ||
81 | config MK8 | |
82 | bool "AMD-Opteron/Athlon64" | |
83 | help | |
84 | Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs. | |
85 | ||
86 | config MPSC | |
87 | bool "Intel EM64T" | |
88 | help | |
89 | Optimize for Intel Pentium 4 and Xeon CPUs with Intel | |
90 | Extended Memory 64 Technology(EM64T). For details see | |
91 | <http://www.intel.com/technology/64bitextensions/>. | |
92 | ||
93 | config GENERIC_CPU | |
94 | bool "Generic-x86-64" | |
95 | help | |
96 | Generic x86-64 CPU. | |
97 | ||
98 | endchoice | |
99 | ||
100 | # | |
101 | # Define implied options from the CPU selection here | |
102 | # | |
103 | config X86_L1_CACHE_BYTES | |
104 | int | |
105 | default "128" if GENERIC_CPU || MPSC | |
106 | default "64" if MK8 | |
107 | ||
108 | config X86_L1_CACHE_SHIFT | |
109 | int | |
110 | default "7" if GENERIC_CPU || MPSC | |
111 | default "6" if MK8 | |
112 | ||
113 | config X86_TSC | |
114 | bool | |
115 | default y | |
116 | ||
117 | config X86_GOOD_APIC | |
118 | bool | |
119 | default y | |
120 | ||
121 | config MICROCODE | |
122 | tristate "/dev/cpu/microcode - Intel CPU microcode support" | |
123 | ---help--- | |
124 | If you say Y here the 'File systems' section, you will be | |
125 | able to update the microcode on Intel processors. You will | |
126 | obviously need the actual microcode binary data itself which is | |
127 | not shipped with the Linux kernel. | |
128 | ||
129 | For latest news and information on obtaining all the required | |
130 | ingredients for this driver, check: | |
131 | <http://www.urbanmyth.org/microcode/>. | |
132 | ||
133 | To compile this driver as a module, choose M here: the | |
134 | module will be called microcode. | |
135 | If you use modprobe or kmod you may also want to add the line | |
136 | 'alias char-major-10-184 microcode' to your /etc/modules.conf file. | |
137 | ||
138 | config X86_MSR | |
139 | tristate "/dev/cpu/*/msr - Model-specific register support" | |
140 | help | |
141 | This device gives privileged processes access to the x86 | |
142 | Model-Specific Registers (MSRs). It is a character device with | |
143 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. | |
144 | MSR accesses are directed to a specific CPU on multi-processor | |
145 | systems. | |
146 | ||
147 | config X86_CPUID | |
148 | tristate "/dev/cpu/*/cpuid - CPU information support" | |
149 | help | |
150 | This device gives processes access to the x86 CPUID instruction to | |
151 | be executed on a specific processor. It is a character device | |
152 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to | |
153 | /dev/cpu/31/cpuid. | |
154 | ||
1da177e4 LT |
155 | config X86_HT |
156 | bool | |
157 | depends on SMP && !MK8 | |
158 | default y | |
159 | ||
160 | config MATH_EMULATION | |
161 | bool | |
162 | ||
163 | config MCA | |
164 | bool | |
165 | ||
166 | config EISA | |
167 | bool | |
168 | ||
169 | config X86_IO_APIC | |
170 | bool | |
171 | default y | |
172 | ||
173 | config X86_LOCAL_APIC | |
174 | bool | |
175 | default y | |
176 | ||
177 | config MTRR | |
178 | bool "MTRR (Memory Type Range Register) support" | |
179 | ---help--- | |
180 | On Intel P6 family processors (Pentium Pro, Pentium II and later) | |
181 | the Memory Type Range Registers (MTRRs) may be used to control | |
182 | processor access to memory ranges. This is most useful if you have | |
183 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining | |
184 | allows bus write transfers to be combined into a larger transfer | |
185 | before bursting over the PCI/AGP bus. This can increase performance | |
186 | of image write operations 2.5 times or more. Saying Y here creates a | |
187 | /proc/mtrr file which may be used to manipulate your processor's | |
188 | MTRRs. Typically the X server should use this. | |
189 | ||
190 | This code has a reasonably generic interface so that similar | |
191 | control registers on other processors can be easily supported | |
192 | as well. | |
193 | ||
194 | Saying Y here also fixes a problem with buggy SMP BIOSes which only | |
195 | set the MTRRs for the boot CPU and not for the secondary CPUs. This | |
196 | can lead to all sorts of problems, so it's good to say Y here. | |
197 | ||
198 | Just say Y here, all x86-64 machines support MTRRs. | |
199 | ||
200 | See <file:Documentation/mtrr.txt> for more information. | |
201 | ||
202 | config SMP | |
203 | bool "Symmetric multi-processing support" | |
204 | ---help--- | |
205 | This enables support for systems with more than one CPU. If you have | |
206 | a system with only one CPU, like most personal computers, say N. If | |
207 | you have a system with more than one CPU, say Y. | |
208 | ||
209 | If you say N here, the kernel will run on single and multiprocessor | |
210 | machines, but will use only one CPU of a multiprocessor machine. If | |
211 | you say Y here, the kernel will run on many, but not all, | |
212 | singleprocessor machines. On a singleprocessor machine, the kernel | |
213 | will run faster if you say N here. | |
214 | ||
215 | If you don't know what to do here, say N. | |
216 | ||
1da177e4 LT |
217 | config SCHED_SMT |
218 | bool "SMT (Hyperthreading) scheduler support" | |
219 | depends on SMP | |
220 | default n | |
221 | help | |
222 | SMT scheduler support improves the CPU scheduler's decision making | |
223 | when dealing with Intel Pentium 4 chips with HyperThreading at a | |
224 | cost of slightly increased overhead in some places. If unsure say | |
225 | N here. | |
226 | ||
cc19ca86 IM |
227 | source "kernel/Kconfig.preempt" |
228 | ||
b0bd35e6 RT |
229 | config NUMA |
230 | bool "Non Uniform Memory Access (NUMA) Support" | |
1da177e4 LT |
231 | depends on SMP |
232 | help | |
b0bd35e6 RT |
233 | Enable NUMA (Non Uniform Memory Access) support. The kernel |
234 | will try to allocate memory used by a CPU on the local memory | |
235 | controller of the CPU and add some more NUMA awareness to the kernel. | |
236 | This code is recommended on all multiprocessor Opteron systems. | |
237 | If the system is EM64T, you should say N unless your system is EM64T | |
238 | NUMA. | |
239 | ||
240 | config K8_NUMA | |
241 | bool "Old style AMD Opteron NUMA detection" | |
242 | depends on NUMA | |
243 | default y | |
244 | help | |
245 | Enable K8 NUMA node topology detection. You should say Y here if | |
246 | you have a multi processor AMD K8 system. This uses an old | |
247 | method to read the NUMA configurtion directly from the builtin | |
248 | Northbridge of Opteron. It is recommended to use X86_64_ACPI_NUMA | |
249 | instead, which also takes priority if both are compiled in. | |
250 | ||
251 | # Dummy CONFIG option to select ACPI_NUMA from drivers/acpi/Kconfig. | |
252 | ||
253 | config X86_64_ACPI_NUMA | |
254 | bool "ACPI NUMA detection" | |
255 | depends on NUMA | |
256 | select ACPI | |
257 | select ACPI_NUMA | |
258 | default y | |
259 | help | |
260 | Enable ACPI SRAT based node topology detection. | |
1da177e4 LT |
261 | |
262 | config NUMA_EMU | |
b0bd35e6 RT |
263 | bool "NUMA emulation" |
264 | depends on NUMA | |
1da177e4 LT |
265 | help |
266 | Enable NUMA emulation. A flat machine will be split | |
267 | into virtual nodes when booted with "numa=fake=N", where N is the | |
268 | number of nodes. This is only useful for debugging. | |
269 | ||
3f22ab27 | 270 | config ARCH_DISCONTIGMEM_ENABLE |
1da177e4 LT |
271 | bool |
272 | depends on NUMA | |
273 | default y | |
274 | ||
1da177e4 | 275 | |
1035faf1 MT |
276 | config ARCH_DISCONTIGMEM_ENABLE |
277 | def_bool y | |
278 | depends on NUMA | |
279 | ||
280 | config ARCH_DISCONTIGMEM_DEFAULT | |
281 | def_bool y | |
282 | depends on NUMA | |
283 | ||
284 | config ARCH_SPARSEMEM_ENABLE | |
285 | def_bool y | |
286 | depends on NUMA | |
287 | ||
288 | config ARCH_FLATMEM_ENABLE | |
289 | def_bool y | |
290 | depends on !NUMA | |
291 | ||
3f22ab27 DH |
292 | source "mm/Kconfig" |
293 | ||
1035faf1 MT |
294 | config HAVE_ARCH_EARLY_PFN_TO_NID |
295 | def_bool y | |
296 | ||
1da177e4 LT |
297 | config NR_CPUS |
298 | int "Maximum number of CPUs (2-256)" | |
299 | range 2 256 | |
300 | depends on SMP | |
301 | default "8" | |
302 | help | |
303 | This allows you to specify the maximum number of CPUs which this | |
304 | kernel will support. Current maximum is 256 CPUs due to | |
305 | APIC addressing limits. Less depending on the hardware. | |
306 | ||
307 | This is purely to save memory - each supported CPU requires | |
308 | memory in the static kernel configuration. | |
309 | ||
76e4f660 AR |
310 | config HOTPLUG_CPU |
311 | bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" | |
312 | depends on SMP && HOTPLUG && EXPERIMENTAL | |
313 | help | |
314 | Say Y here to experiment with turning CPUs off and on. CPUs | |
315 | can be controlled through /sys/devices/system/cpu/cpu#. | |
316 | Say N if you want to disable CPU hotplug. | |
317 | ||
318 | ||
1da177e4 LT |
319 | config HPET_TIMER |
320 | bool | |
321 | default y | |
322 | help | |
323 | Use the IA-PC HPET (High Precision Event Timer) to manage | |
324 | time in preference to the PIT and RTC, if a HPET is | |
325 | present. The HPET provides a stable time base on SMP | |
326 | systems, unlike the TSC, but it is more expensive to access, | |
327 | as it is off-chip. You can find the HPET spec at | |
89d7cbf7 | 328 | <http://www.intel.com/hardwaredesign/hpetspec.htm>. |
1da177e4 | 329 | |
312df5f1 AK |
330 | config X86_PM_TIMER |
331 | bool "PM timer" | |
9c2be6a0 | 332 | depends on ACPI |
312df5f1 AK |
333 | default y |
334 | help | |
335 | Support the ACPI PM timer for time keeping. This is slow, | |
336 | but is useful on some chipsets without HPET on systems with more | |
337 | than one CPU. On a single processor or single socket multi core | |
338 | system it is normally not required. | |
339 | When the PM timer is active 64bit vsyscalls are disabled | |
340 | and should not be enabled (/proc/sys/kernel/vsyscall64 should | |
341 | not be changed). | |
342 | The kernel selects the PM timer only as a last resort, so it is | |
343 | useful to enable just in case. | |
344 | ||
1da177e4 LT |
345 | config HPET_EMULATE_RTC |
346 | bool "Provide RTC interrupt" | |
347 | depends on HPET_TIMER && RTC=y | |
348 | ||
349 | config GART_IOMMU | |
350 | bool "IOMMU support" | |
a54649b8 | 351 | default y |
1da177e4 LT |
352 | depends on PCI |
353 | help | |
a54649b8 | 354 | Support the IOMMU. Needed to run systems with more than 3GB of memory |
1da177e4 LT |
355 | properly with 32-bit PCI devices that do not support DAC (Double Address |
356 | Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter. | |
357 | Normally the kernel will take the right choice by itself. | |
a54649b8 AK |
358 | This option includes a driver for the AMD Opteron/Athlon64 IOMMU |
359 | and a software emulation used on some other systems. | |
1da177e4 LT |
360 | If unsure, say Y. |
361 | ||
362 | # need this always enabled with GART_IOMMU for the VIA workaround | |
363 | config SWIOTLB | |
364 | bool | |
365 | depends on GART_IOMMU | |
366 | default y | |
367 | ||
368 | config DUMMY_IOMMU | |
369 | bool | |
370 | depends on !GART_IOMMU && !SWIOTLB | |
371 | default y | |
372 | help | |
373 | Don't use IOMMU code. This will cause problems when you have more than 4GB | |
374 | of memory and any 32-bit devices. Don't turn on unless you know what you | |
375 | are doing. | |
376 | ||
377 | config X86_MCE | |
378 | bool "Machine check support" if EMBEDDED | |
379 | default y | |
380 | help | |
381 | Include a machine check error handler to report hardware errors. | |
382 | This version will require the mcelog utility to decode some | |
383 | machine check error logs. See | |
384 | ftp://ftp.x86-64.org/pub/linux/tools/mcelog | |
385 | ||
386 | config X86_MCE_INTEL | |
387 | bool "Intel MCE features" | |
388 | depends on X86_MCE && X86_LOCAL_APIC | |
389 | default y | |
390 | help | |
391 | Additional support for intel specific MCE features such as | |
392 | the thermal monitor. | |
393 | ||
89b831ef JS |
394 | config X86_MCE_AMD |
395 | bool "AMD MCE features" | |
396 | depends on X86_MCE && X86_LOCAL_APIC | |
397 | default y | |
398 | help | |
399 | Additional support for AMD specific MCE features such as | |
400 | the DRAM Error Threshold. | |
401 | ||
d0537508 EB |
402 | config PHYSICAL_START |
403 | hex "Physical address where the kernel is loaded" if EMBEDDED | |
404 | default "0x100000" | |
405 | help | |
406 | This gives the physical address where the kernel is loaded. | |
407 | Primarily used in the case of kexec on panic where the | |
408 | fail safe kernel needs to run at a different address than | |
409 | the panic-ed kernel. | |
410 | ||
411 | Don't change this unless you know what you are doing. | |
412 | ||
5234f5eb EB |
413 | config KEXEC |
414 | bool "kexec system call (EXPERIMENTAL)" | |
415 | depends on EXPERIMENTAL | |
416 | help | |
417 | kexec is a system call that implements the ability to shutdown your | |
418 | current kernel, and to start another kernel. It is like a reboot | |
419 | but it is indepedent of the system firmware. And like a reboot | |
420 | you can start any kernel with it, not just Linux. | |
421 | ||
422 | The name comes from the similiarity to the exec system call. | |
423 | ||
424 | It is an ongoing process to be certain the hardware in a machine | |
425 | is properly shutdown, so do not be surprised if this code does not | |
426 | initially work for you. It may help to enable device hotplugging | |
427 | support. As of this writing the exact hardware interface is | |
428 | strongly in flux, so no good recommendation can be made. | |
429 | ||
1da177e4 LT |
430 | config SECCOMP |
431 | bool "Enable seccomp to safely compute untrusted bytecode" | |
432 | depends on PROC_FS | |
433 | default y | |
434 | help | |
435 | This kernel feature is useful for number crunching applications | |
436 | that may need to compute untrusted bytecode during their | |
437 | execution. By using pipes or other transports made available to | |
438 | the process as file descriptors supporting the read/write | |
439 | syscalls, it's possible to isolate those applications in | |
440 | their own address space using seccomp. Once seccomp is | |
441 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
442 | and the task is only allowed to execute a few safe syscalls | |
443 | defined by each seccomp mode. | |
444 | ||
445 | If unsure, say Y. Only embedded should say N here. | |
446 | ||
59121003 CL |
447 | source kernel/Kconfig.hz |
448 | ||
1da177e4 LT |
449 | endmenu |
450 | ||
451 | # | |
452 | # Use the generic interrupt handling code in kernel/irq/: | |
453 | # | |
454 | config GENERIC_HARDIRQS | |
455 | bool | |
456 | default y | |
457 | ||
458 | config GENERIC_IRQ_PROBE | |
459 | bool | |
460 | default y | |
461 | ||
5cae841b AV |
462 | # we have no ISA slots, but we do have ISA-style DMA. |
463 | config ISA_DMA_API | |
464 | bool | |
465 | default y | |
466 | ||
54d5d424 AR |
467 | config GENERIC_PENDING_IRQ |
468 | bool | |
469 | depends on GENERIC_HARDIRQS && SMP | |
470 | default y | |
471 | ||
1da177e4 LT |
472 | menu "Power management options" |
473 | ||
474 | source kernel/power/Kconfig | |
475 | ||
476 | source "drivers/acpi/Kconfig" | |
477 | ||
478 | source "arch/x86_64/kernel/cpufreq/Kconfig" | |
479 | ||
480 | endmenu | |
481 | ||
482 | menu "Bus options (PCI etc.)" | |
483 | ||
484 | config PCI | |
485 | bool "PCI support" | |
486 | ||
487 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. | |
488 | config PCI_DIRECT | |
489 | bool | |
490 | depends on PCI | |
491 | default y | |
492 | ||
493 | config PCI_MMCONFIG | |
494 | bool "Support mmconfig PCI config space access" | |
8aadff7d | 495 | depends on PCI && ACPI |
1da177e4 LT |
496 | |
497 | config UNORDERED_IO | |
498 | bool "Unordered IO mapping access" | |
499 | depends on EXPERIMENTAL | |
500 | help | |
501 | Use unordered stores to access IO memory mappings in device drivers. | |
502 | Still very experimental. When a driver works on IA64/ppc64/pa-risc it should | |
503 | work with this option, but it makes the drivers behave differently | |
504 | from i386. Requires that the driver writer used memory barriers | |
505 | properly. | |
506 | ||
507 | source "drivers/pci/pcie/Kconfig" | |
508 | ||
509 | source "drivers/pci/Kconfig" | |
510 | ||
511 | source "drivers/pcmcia/Kconfig" | |
512 | ||
513 | source "drivers/pci/hotplug/Kconfig" | |
514 | ||
515 | endmenu | |
516 | ||
517 | ||
518 | menu "Executable file formats / Emulations" | |
519 | ||
520 | source "fs/Kconfig.binfmt" | |
521 | ||
522 | config IA32_EMULATION | |
523 | bool "IA32 Emulation" | |
524 | help | |
525 | Include code to run 32-bit programs under a 64-bit kernel. You should likely | |
526 | turn this on, unless you're 100% sure that you don't have any 32-bit programs | |
527 | left. | |
528 | ||
529 | config IA32_AOUT | |
ea0be473 | 530 | tristate "IA32 a.out support" |
1da177e4 LT |
531 | depends on IA32_EMULATION |
532 | help | |
533 | Support old a.out binaries in the 32bit emulation. | |
534 | ||
535 | config COMPAT | |
536 | bool | |
537 | depends on IA32_EMULATION | |
538 | default y | |
539 | ||
540 | config SYSVIPC_COMPAT | |
541 | bool | |
542 | depends on COMPAT && SYSVIPC | |
543 | default y | |
544 | ||
545 | config UID16 | |
546 | bool | |
547 | depends on IA32_EMULATION | |
548 | default y | |
549 | ||
550 | endmenu | |
551 | ||
d5950b43 SR |
552 | source "net/Kconfig" |
553 | ||
1da177e4 LT |
554 | source drivers/Kconfig |
555 | ||
556 | source "drivers/firmware/Kconfig" | |
557 | ||
558 | source fs/Kconfig | |
559 | ||
560 | source "arch/x86_64/oprofile/Kconfig" | |
561 | ||
562 | source "arch/x86_64/Kconfig.debug" | |
563 | ||
564 | source "security/Kconfig" | |
565 | ||
566 | source "crypto/Kconfig" | |
567 | ||
568 | source "lib/Kconfig" |