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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 | ||
27 | config MMU | |
28 | bool | |
29 | default y | |
30 | ||
31 | config ISA | |
32 | bool | |
33 | ||
34 | config SBUS | |
35 | bool | |
36 | ||
37 | config RWSEM_GENERIC_SPINLOCK | |
38 | bool | |
39 | default y | |
40 | ||
41 | config RWSEM_XCHGADD_ALGORITHM | |
42 | bool | |
43 | ||
44 | config GENERIC_CALIBRATE_DELAY | |
45 | bool | |
46 | default y | |
47 | ||
48 | config X86_CMPXCHG | |
49 | bool | |
50 | default y | |
51 | ||
52 | config EARLY_PRINTK | |
53 | bool | |
54 | default y | |
55 | ||
56 | config GENERIC_ISA_DMA | |
57 | bool | |
58 | default y | |
59 | ||
60 | config GENERIC_IOMAP | |
61 | bool | |
62 | default y | |
63 | ||
64 | source "init/Kconfig" | |
65 | ||
66 | ||
67 | menu "Processor type and features" | |
68 | ||
69 | choice | |
70 | prompt "Processor family" | |
71 | default MK8 | |
72 | ||
73 | config MK8 | |
74 | bool "AMD-Opteron/Athlon64" | |
75 | help | |
76 | Optimize for AMD Opteron/Athlon64/Hammer/K8 CPUs. | |
77 | ||
78 | config MPSC | |
79 | bool "Intel EM64T" | |
80 | help | |
81 | Optimize for Intel Pentium 4 and Xeon CPUs with Intel | |
82 | Extended Memory 64 Technology(EM64T). For details see | |
83 | <http://www.intel.com/technology/64bitextensions/>. | |
84 | ||
85 | config GENERIC_CPU | |
86 | bool "Generic-x86-64" | |
87 | help | |
88 | Generic x86-64 CPU. | |
89 | ||
90 | endchoice | |
91 | ||
92 | # | |
93 | # Define implied options from the CPU selection here | |
94 | # | |
95 | config X86_L1_CACHE_BYTES | |
96 | int | |
97 | default "128" if GENERIC_CPU || MPSC | |
98 | default "64" if MK8 | |
99 | ||
100 | config X86_L1_CACHE_SHIFT | |
101 | int | |
102 | default "7" if GENERIC_CPU || MPSC | |
103 | default "6" if MK8 | |
104 | ||
105 | config X86_TSC | |
106 | bool | |
107 | default y | |
108 | ||
109 | config X86_GOOD_APIC | |
110 | bool | |
111 | default y | |
112 | ||
113 | config MICROCODE | |
114 | tristate "/dev/cpu/microcode - Intel CPU microcode support" | |
115 | ---help--- | |
116 | If you say Y here the 'File systems' section, you will be | |
117 | able to update the microcode on Intel processors. You will | |
118 | obviously need the actual microcode binary data itself which is | |
119 | not shipped with the Linux kernel. | |
120 | ||
121 | For latest news and information on obtaining all the required | |
122 | ingredients for this driver, check: | |
123 | <http://www.urbanmyth.org/microcode/>. | |
124 | ||
125 | To compile this driver as a module, choose M here: the | |
126 | module will be called microcode. | |
127 | If you use modprobe or kmod you may also want to add the line | |
128 | 'alias char-major-10-184 microcode' to your /etc/modules.conf file. | |
129 | ||
130 | config X86_MSR | |
131 | tristate "/dev/cpu/*/msr - Model-specific register support" | |
132 | help | |
133 | This device gives privileged processes access to the x86 | |
134 | Model-Specific Registers (MSRs). It is a character device with | |
135 | major 202 and minors 0 to 31 for /dev/cpu/0/msr to /dev/cpu/31/msr. | |
136 | MSR accesses are directed to a specific CPU on multi-processor | |
137 | systems. | |
138 | ||
139 | config X86_CPUID | |
140 | tristate "/dev/cpu/*/cpuid - CPU information support" | |
141 | help | |
142 | This device gives processes access to the x86 CPUID instruction to | |
143 | be executed on a specific processor. It is a character device | |
144 | with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to | |
145 | /dev/cpu/31/cpuid. | |
146 | ||
147 | # disable it for opteron optimized builds because it pulls in ACPI_BOOT | |
148 | config X86_HT | |
149 | bool | |
150 | depends on SMP && !MK8 | |
151 | default y | |
152 | ||
153 | config MATH_EMULATION | |
154 | bool | |
155 | ||
156 | config MCA | |
157 | bool | |
158 | ||
159 | config EISA | |
160 | bool | |
161 | ||
162 | config X86_IO_APIC | |
163 | bool | |
164 | default y | |
165 | ||
166 | config X86_LOCAL_APIC | |
167 | bool | |
168 | default y | |
169 | ||
170 | config MTRR | |
171 | bool "MTRR (Memory Type Range Register) support" | |
172 | ---help--- | |
173 | On Intel P6 family processors (Pentium Pro, Pentium II and later) | |
174 | the Memory Type Range Registers (MTRRs) may be used to control | |
175 | processor access to memory ranges. This is most useful if you have | |
176 | a video (VGA) card on a PCI or AGP bus. Enabling write-combining | |
177 | allows bus write transfers to be combined into a larger transfer | |
178 | before bursting over the PCI/AGP bus. This can increase performance | |
179 | of image write operations 2.5 times or more. Saying Y here creates a | |
180 | /proc/mtrr file which may be used to manipulate your processor's | |
181 | MTRRs. Typically the X server should use this. | |
182 | ||
183 | This code has a reasonably generic interface so that similar | |
184 | control registers on other processors can be easily supported | |
185 | as well. | |
186 | ||
187 | Saying Y here also fixes a problem with buggy SMP BIOSes which only | |
188 | set the MTRRs for the boot CPU and not for the secondary CPUs. This | |
189 | can lead to all sorts of problems, so it's good to say Y here. | |
190 | ||
191 | Just say Y here, all x86-64 machines support MTRRs. | |
192 | ||
193 | See <file:Documentation/mtrr.txt> for more information. | |
194 | ||
195 | config SMP | |
196 | bool "Symmetric multi-processing support" | |
197 | ---help--- | |
198 | This enables support for systems with more than one CPU. If you have | |
199 | a system with only one CPU, like most personal computers, say N. If | |
200 | you have a system with more than one CPU, say Y. | |
201 | ||
202 | If you say N here, the kernel will run on single and multiprocessor | |
203 | machines, but will use only one CPU of a multiprocessor machine. If | |
204 | you say Y here, the kernel will run on many, but not all, | |
205 | singleprocessor machines. On a singleprocessor machine, the kernel | |
206 | will run faster if you say N here. | |
207 | ||
208 | If you don't know what to do here, say N. | |
209 | ||
210 | config PREEMPT | |
211 | bool "Preemptible Kernel" | |
212 | ---help--- | |
213 | This option reduces the latency of the kernel when reacting to | |
214 | real-time or interactive events by allowing a low priority process to | |
215 | be preempted even if it is in kernel mode executing a system call. | |
216 | This allows applications to run more reliably even when the system is | |
217 | under load. On contrary it may also break your drivers and add | |
218 | priority inheritance problems to your system. Don't select it if | |
219 | you rely on a stable system or have slightly obscure hardware. | |
220 | It's also not very well tested on x86-64 currently. | |
221 | You have been warned. | |
222 | ||
223 | Say Y here if you are feeling brave and building a kernel for a | |
224 | desktop, embedded or real-time system. Say N if you are unsure. | |
225 | ||
226 | config PREEMPT_BKL | |
227 | bool "Preempt The Big Kernel Lock" | |
228 | depends on PREEMPT | |
229 | default y | |
230 | help | |
231 | This option reduces the latency of the kernel by making the | |
232 | big kernel lock preemptible. | |
233 | ||
234 | Say Y here if you are building a kernel for a desktop system. | |
235 | Say N if you are unsure. | |
236 | ||
237 | config SCHED_SMT | |
238 | bool "SMT (Hyperthreading) scheduler support" | |
239 | depends on SMP | |
240 | default n | |
241 | help | |
242 | SMT scheduler support improves the CPU scheduler's decision making | |
243 | when dealing with Intel Pentium 4 chips with HyperThreading at a | |
244 | cost of slightly increased overhead in some places. If unsure say | |
245 | N here. | |
246 | ||
247 | config K8_NUMA | |
248 | bool "K8 NUMA support" | |
249 | select NUMA | |
250 | depends on SMP | |
251 | help | |
252 | Enable NUMA (Non Unified Memory Architecture) support for | |
253 | AMD Opteron Multiprocessor systems. The kernel will try to allocate | |
254 | memory used by a CPU on the local memory controller of the CPU | |
255 | and add some more NUMA awareness to the kernel. | |
256 | This code is recommended on all multiprocessor Opteron systems | |
257 | and normally doesn't hurt on others. | |
258 | ||
259 | config NUMA_EMU | |
260 | bool "NUMA emulation support" | |
261 | select NUMA | |
262 | depends on SMP | |
263 | help | |
264 | Enable NUMA emulation. A flat machine will be split | |
265 | into virtual nodes when booted with "numa=fake=N", where N is the | |
266 | number of nodes. This is only useful for debugging. | |
267 | ||
268 | config DISCONTIGMEM | |
269 | bool | |
270 | depends on NUMA | |
271 | default y | |
272 | ||
273 | config NUMA | |
274 | bool | |
275 | default n | |
276 | ||
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 | ||
295 | config HPET_TIMER | |
296 | bool | |
297 | default y | |
298 | help | |
299 | Use the IA-PC HPET (High Precision Event Timer) to manage | |
300 | time in preference to the PIT and RTC, if a HPET is | |
301 | present. The HPET provides a stable time base on SMP | |
302 | systems, unlike the TSC, but it is more expensive to access, | |
303 | as it is off-chip. You can find the HPET spec at | |
304 | <http://www.intel.com/labs/platcomp/hpet/hpetspec.htm>. | |
305 | ||
312df5f1 AK |
306 | config X86_PM_TIMER |
307 | bool "PM timer" | |
308 | default y | |
309 | help | |
310 | Support the ACPI PM timer for time keeping. This is slow, | |
311 | but is useful on some chipsets without HPET on systems with more | |
312 | than one CPU. On a single processor or single socket multi core | |
313 | system it is normally not required. | |
314 | When the PM timer is active 64bit vsyscalls are disabled | |
315 | and should not be enabled (/proc/sys/kernel/vsyscall64 should | |
316 | not be changed). | |
317 | The kernel selects the PM timer only as a last resort, so it is | |
318 | useful to enable just in case. | |
319 | ||
1da177e4 LT |
320 | config HPET_EMULATE_RTC |
321 | bool "Provide RTC interrupt" | |
322 | depends on HPET_TIMER && RTC=y | |
323 | ||
324 | config GART_IOMMU | |
325 | bool "IOMMU support" | |
326 | depends on PCI | |
327 | help | |
328 | Support the K8 IOMMU. Needed to run systems with more than 4GB of memory | |
329 | properly with 32-bit PCI devices that do not support DAC (Double Address | |
330 | Cycle). The IOMMU can be turned off at runtime with the iommu=off parameter. | |
331 | Normally the kernel will take the right choice by itself. | |
332 | If unsure, say Y. | |
333 | ||
334 | # need this always enabled with GART_IOMMU for the VIA workaround | |
335 | config SWIOTLB | |
336 | bool | |
337 | depends on GART_IOMMU | |
338 | default y | |
339 | ||
340 | config DUMMY_IOMMU | |
341 | bool | |
342 | depends on !GART_IOMMU && !SWIOTLB | |
343 | default y | |
344 | help | |
345 | Don't use IOMMU code. This will cause problems when you have more than 4GB | |
346 | of memory and any 32-bit devices. Don't turn on unless you know what you | |
347 | are doing. | |
348 | ||
349 | config X86_MCE | |
350 | bool "Machine check support" if EMBEDDED | |
351 | default y | |
352 | help | |
353 | Include a machine check error handler to report hardware errors. | |
354 | This version will require the mcelog utility to decode some | |
355 | machine check error logs. See | |
356 | ftp://ftp.x86-64.org/pub/linux/tools/mcelog | |
357 | ||
358 | config X86_MCE_INTEL | |
359 | bool "Intel MCE features" | |
360 | depends on X86_MCE && X86_LOCAL_APIC | |
361 | default y | |
362 | help | |
363 | Additional support for intel specific MCE features such as | |
364 | the thermal monitor. | |
365 | ||
366 | config SECCOMP | |
367 | bool "Enable seccomp to safely compute untrusted bytecode" | |
368 | depends on PROC_FS | |
369 | default y | |
370 | help | |
371 | This kernel feature is useful for number crunching applications | |
372 | that may need to compute untrusted bytecode during their | |
373 | execution. By using pipes or other transports made available to | |
374 | the process as file descriptors supporting the read/write | |
375 | syscalls, it's possible to isolate those applications in | |
376 | their own address space using seccomp. Once seccomp is | |
377 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
378 | and the task is only allowed to execute a few safe syscalls | |
379 | defined by each seccomp mode. | |
380 | ||
381 | If unsure, say Y. Only embedded should say N here. | |
382 | ||
383 | endmenu | |
384 | ||
385 | # | |
386 | # Use the generic interrupt handling code in kernel/irq/: | |
387 | # | |
388 | config GENERIC_HARDIRQS | |
389 | bool | |
390 | default y | |
391 | ||
392 | config GENERIC_IRQ_PROBE | |
393 | bool | |
394 | default y | |
395 | ||
5cae841b AV |
396 | # we have no ISA slots, but we do have ISA-style DMA. |
397 | config ISA_DMA_API | |
398 | bool | |
399 | default y | |
400 | ||
1da177e4 LT |
401 | menu "Power management options" |
402 | ||
403 | source kernel/power/Kconfig | |
404 | ||
405 | source "drivers/acpi/Kconfig" | |
406 | ||
407 | source "arch/x86_64/kernel/cpufreq/Kconfig" | |
408 | ||
409 | endmenu | |
410 | ||
411 | menu "Bus options (PCI etc.)" | |
412 | ||
413 | config PCI | |
414 | bool "PCI support" | |
415 | ||
416 | # x86-64 doesn't support PCI BIOS access from long mode so always go direct. | |
417 | config PCI_DIRECT | |
418 | bool | |
419 | depends on PCI | |
420 | default y | |
421 | ||
422 | config PCI_MMCONFIG | |
423 | bool "Support mmconfig PCI config space access" | |
424 | depends on PCI | |
425 | select ACPI_BOOT | |
426 | ||
427 | config UNORDERED_IO | |
428 | bool "Unordered IO mapping access" | |
429 | depends on EXPERIMENTAL | |
430 | help | |
431 | Use unordered stores to access IO memory mappings in device drivers. | |
432 | Still very experimental. When a driver works on IA64/ppc64/pa-risc it should | |
433 | work with this option, but it makes the drivers behave differently | |
434 | from i386. Requires that the driver writer used memory barriers | |
435 | properly. | |
436 | ||
437 | source "drivers/pci/pcie/Kconfig" | |
438 | ||
439 | source "drivers/pci/Kconfig" | |
440 | ||
441 | source "drivers/pcmcia/Kconfig" | |
442 | ||
443 | source "drivers/pci/hotplug/Kconfig" | |
444 | ||
445 | endmenu | |
446 | ||
447 | ||
448 | menu "Executable file formats / Emulations" | |
449 | ||
450 | source "fs/Kconfig.binfmt" | |
451 | ||
452 | config IA32_EMULATION | |
453 | bool "IA32 Emulation" | |
454 | help | |
455 | Include code to run 32-bit programs under a 64-bit kernel. You should likely | |
456 | turn this on, unless you're 100% sure that you don't have any 32-bit programs | |
457 | left. | |
458 | ||
459 | config IA32_AOUT | |
460 | bool "IA32 a.out support" | |
461 | depends on IA32_EMULATION | |
462 | help | |
463 | Support old a.out binaries in the 32bit emulation. | |
464 | ||
465 | config COMPAT | |
466 | bool | |
467 | depends on IA32_EMULATION | |
468 | default y | |
469 | ||
470 | config SYSVIPC_COMPAT | |
471 | bool | |
472 | depends on COMPAT && SYSVIPC | |
473 | default y | |
474 | ||
475 | config UID16 | |
476 | bool | |
477 | depends on IA32_EMULATION | |
478 | default y | |
479 | ||
480 | endmenu | |
481 | ||
482 | source drivers/Kconfig | |
483 | ||
484 | source "drivers/firmware/Kconfig" | |
485 | ||
486 | source fs/Kconfig | |
487 | ||
488 | source "arch/x86_64/oprofile/Kconfig" | |
489 | ||
490 | source "arch/x86_64/Kconfig.debug" | |
491 | ||
492 | source "security/Kconfig" | |
493 | ||
494 | source "crypto/Kconfig" | |
495 | ||
496 | source "lib/Kconfig" |