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