Commit | Line | Data |
---|---|---|
14cf11af PM |
1 | # For a description of the syntax of this configuration file, |
2 | # see Documentation/kbuild/kconfig-language.txt. | |
3 | # | |
4 | ||
5 | mainmenu "Linux/PowerPC Kernel Configuration" | |
6 | ||
a0ae9c7c | 7 | source "arch/powerpc/platforms/Kconfig.cputype" |
17e638bc | 8 | |
14cf11af PM |
9 | config PPC32 |
10 | bool | |
11 | default y if !PPC64 | |
12 | ||
13 | config 64BIT | |
14 | bool | |
15 | default y if PPC64 | |
16 | ||
2578bfae SR |
17 | config WORD_SIZE |
18 | int | |
19 | default 64 if PPC64 | |
20 | default 32 if !PPC64 | |
21 | ||
600715dc JF |
22 | config ARCH_PHYS_ADDR_T_64BIT |
23 | def_bool PPC64 || PHYS_64BIT | |
24 | ||
14cf11af PM |
25 | config MMU |
26 | bool | |
27 | default y | |
28 | ||
aa3be5f3 TB |
29 | config GENERIC_CMOS_UPDATE |
30 | def_bool y | |
31 | ||
4a4cfe38 TB |
32 | config GENERIC_TIME |
33 | def_bool y | |
34 | ||
35 | config GENERIC_TIME_VSYSCALL | |
36 | def_bool y | |
37 | ||
d831d0b8 TB |
38 | config GENERIC_CLOCKEVENTS |
39 | def_bool y | |
40 | ||
14cf11af PM |
41 | config GENERIC_HARDIRQS |
42 | bool | |
43 | default y | |
44 | ||
8e27f4da ME |
45 | config GENERIC_HARDIRQS_NO__DO_IRQ |
46 | bool | |
47 | default y | |
48 | ||
c2a7e818 | 49 | config HAVE_SETUP_PER_CPU_AREA |
e74e3962 TH |
50 | def_bool PPC64 |
51 | ||
c2a7e818 | 52 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
b32ef636 | 53 | def_bool PPC64 |
54 | ||
0d7012a9 IM |
55 | config IRQ_PER_CPU |
56 | bool | |
57 | default y | |
58 | ||
fd3e0bbc CH |
59 | config STACKTRACE_SUPPORT |
60 | bool | |
61 | default y | |
62 | ||
01f4b8b8 AB |
63 | config HAVE_LATENCYTOP_SUPPORT |
64 | def_bool y | |
65 | ||
945feb17 BH |
66 | config TRACE_IRQFLAGS_SUPPORT |
67 | bool | |
945feb17 BH |
68 | default y |
69 | ||
70 | config LOCKDEP_SUPPORT | |
71 | bool | |
72 | default y | |
73 | ||
14cf11af PM |
74 | config RWSEM_GENERIC_SPINLOCK |
75 | bool | |
76 | ||
77 | config RWSEM_XCHGADD_ALGORITHM | |
78 | bool | |
79 | default y | |
80 | ||
95c354fe NP |
81 | config GENERIC_LOCKBREAK |
82 | bool | |
83 | default y | |
84 | depends on SMP && PREEMPT | |
85 | ||
f0d1b0b3 DH |
86 | config ARCH_HAS_ILOG2_U32 |
87 | bool | |
ef55d53c | 88 | default y |
f0d1b0b3 DH |
89 | |
90 | config ARCH_HAS_ILOG2_U64 | |
91 | bool | |
ef55d53c | 92 | default y if 64BIT |
f0d1b0b3 | 93 | |
e779b2f9 AM |
94 | config GENERIC_HWEIGHT |
95 | bool | |
96 | default y | |
97 | ||
0a9cb46a JM |
98 | config GENERIC_FIND_NEXT_BIT |
99 | bool | |
100 | default y | |
101 | ||
b7ce3415 AV |
102 | config GENERIC_GPIO |
103 | bool | |
104 | help | |
105 | Generic GPIO API support | |
106 | ||
f057eac0 SR |
107 | config ARCH_NO_VIRT_TO_BUS |
108 | def_bool PPC64 | |
109 | ||
14cf11af PM |
110 | config PPC |
111 | bool | |
112 | default y | |
2b79d696 SR |
113 | select HAVE_FTRACE_MCOUNT_RECORD |
114 | select HAVE_DYNAMIC_FTRACE | |
606576ce | 115 | select HAVE_FUNCTION_TRACER |
60ce8f72 | 116 | select HAVE_FUNCTION_GRAPH_TRACER |
7444a72e | 117 | select ARCH_WANT_OPTIONAL_GPIOLIB |
ec7748b5 | 118 | select HAVE_IDE |
a1f242ff | 119 | select HAVE_IOREMAP_PROT |
58340a07 | 120 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
3f550096 | 121 | select HAVE_KPROBES |
17ce452f | 122 | select HAVE_ARCH_KGDB |
9edddaa2 | 123 | select HAVE_KRETPROBES |
dec2b0d0 | 124 | select HAVE_ARCH_TRACEHOOK |
d9b2b2a2 | 125 | select HAVE_LMB |
46bab4e4 | 126 | select HAVE_DMA_ATTRS |
80d3e8ab | 127 | select HAVE_DMA_API_DEBUG |
b7d7a240 | 128 | select USE_GENERIC_SMP_HELPERS if SMP |
4e491d14 | 129 | select HAVE_OPROFILE |
ee6a0932 | 130 | select HAVE_SYSCALL_WRAPPERS if PPC64 |
c2e95c6d | 131 | select GENERIC_ATOMIC64 if PPC32 |
cdd6c482 | 132 | select HAVE_PERF_EVENTS |
14cf11af PM |
133 | |
134 | config EARLY_PRINTK | |
135 | bool | |
51d3082f | 136 | default y |
14cf11af PM |
137 | |
138 | config COMPAT | |
139 | bool | |
140 | default y if PPC64 | |
01e31dba | 141 | select COMPAT_BINFMT_ELF |
14cf11af PM |
142 | |
143 | config SYSVIPC_COMPAT | |
144 | bool | |
145 | depends on COMPAT && SYSVIPC | |
146 | default y | |
147 | ||
148 | # All PPC32s use generic nvram driver through ppc_md | |
149 | config GENERIC_NVRAM | |
150 | bool | |
151 | default y if PPC32 | |
152 | ||
ae1e9130 | 153 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
154 | bool |
155 | default y | |
156 | ||
157 | config ARCH_MAY_HAVE_PC_FDC | |
158 | bool | |
bed59275 | 159 | default !PPC_PSERIES || PCI |
14cf11af | 160 | |
08264cbc KG |
161 | config PPC_OF |
162 | def_bool y | |
163 | ||
97e873e5 SR |
164 | config OF |
165 | def_bool y | |
166 | ||
08264cbc KG |
167 | config PPC_UDBG_16550 |
168 | bool | |
169 | default n | |
170 | ||
08264cbc KG |
171 | config GENERIC_TBSYNC |
172 | bool | |
173 | default y if PPC32 && SMP | |
174 | default n | |
175 | ||
e65e1fc2 AV |
176 | config AUDIT_ARCH |
177 | bool | |
178 | default y | |
179 | ||
73c9ceab JF |
180 | config GENERIC_BUG |
181 | bool | |
182 | default y | |
183 | depends on BUG | |
184 | ||
b3028878 | 185 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 186 | default y if PMAC_APM_EMU |
b3028878 JB |
187 | bool |
188 | ||
9fffb55f DG |
189 | config DTC |
190 | bool | |
191 | default y | |
192 | ||
f4fc4a5b KG |
193 | config DEFAULT_UIMAGE |
194 | bool | |
195 | help | |
196 | Used to allow a board to specify it wants a uImage built by default | |
197 | default n | |
198 | ||
b09c1644 SW |
199 | config REDBOOT |
200 | bool | |
201 | ||
801e4062 | 202 | config HIBERNATE_32 |
543b9fd3 | 203 | bool |
801e4062 JB |
204 | depends on (PPC_PMAC && !SMP) || BROKEN |
205 | default y | |
206 | ||
207 | config HIBERNATE_64 | |
208 | bool | |
209 | depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL) | |
210 | default y | |
211 | ||
212 | config ARCH_HIBERNATION_POSSIBLE | |
213 | bool | |
214 | depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32) | |
543b9fd3 JB |
215 | default y |
216 | ||
f4cb5700 JB |
217 | config ARCH_SUSPEND_POSSIBLE |
218 | def_bool y | |
d49747bd | 219 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx |
f4cb5700 | 220 | |
4c75a6f4 BH |
221 | config PPC_DCR_NATIVE |
222 | bool | |
223 | default n | |
224 | ||
225 | config PPC_DCR_MMIO | |
226 | bool | |
227 | default n | |
228 | ||
229 | config PPC_DCR | |
230 | bool | |
231 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
232 | default y | |
233 | ||
4c9d2800 BH |
234 | config PPC_OF_PLATFORM_PCI |
235 | bool | |
373a6da1 | 236 | depends on PCI |
4c9d2800 BH |
237 | depends on PPC64 # not supported on 32 bits yet |
238 | default n | |
239 | ||
6a11f75b AM |
240 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
241 | def_bool y | |
242 | ||
14cf11af PM |
243 | source "init/Kconfig" |
244 | ||
dc52ddc0 MH |
245 | source "kernel/Kconfig.freezer" |
246 | ||
a2d2e1ec | 247 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 248 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 249 | |
14cf11af PM |
250 | menu "Kernel options" |
251 | ||
252 | config HIGHMEM | |
253 | bool "High memory support" | |
254 | depends on PPC32 | |
255 | ||
1ad74998 | 256 | source kernel/time/Kconfig |
14cf11af PM |
257 | source kernel/Kconfig.hz |
258 | source kernel/Kconfig.preempt | |
259 | source "fs/Kconfig.binfmt" | |
260 | ||
ba72cb8c MG |
261 | config HUGETLB_PAGE_SIZE_VARIABLE |
262 | bool | |
263 | depends on HUGETLB_PAGE | |
264 | default y | |
265 | ||
14cf11af PM |
266 | config MATH_EMULATION |
267 | bool "Math emulation" | |
4d52719a | 268 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
269 | ---help--- |
270 | Some PowerPC chips designed for embedded applications do not have | |
271 | a floating-point unit and therefore do not implement the | |
272 | floating-point instructions in the PowerPC instruction set. If you | |
273 | say Y here, the kernel will include code to emulate a floating-point | |
274 | unit, which will allow programs that use floating-point | |
275 | instructions to run. | |
276 | ||
5dd57a13 SW |
277 | config 8XX_MINIMAL_FPEMU |
278 | bool "Minimal math emulation for 8xx" | |
279 | depends on 8xx && !MATH_EMULATION | |
280 | help | |
281 | Older arch/ppc kernels still emulated a few floating point | |
282 | instructions such as load and store, even when full math | |
283 | emulation is disabled. Say "Y" here if you want to preserve | |
284 | this behavior. | |
285 | ||
286 | It is recommended that you build a soft-float userspace instead. | |
287 | ||
14cf11af | 288 | config IOMMU_VMERGE |
768cc2d3 LV |
289 | bool "Enable IOMMU virtual merging" |
290 | depends on PPC64 | |
291 | default y | |
14cf11af PM |
292 | help |
293 | Cause IO segments sent to a device for DMA to be merged virtually | |
294 | by the IOMMU when they happen to have been allocated contiguously. | |
295 | This doesn't add pressure to the IOMMU allocator. However, some | |
296 | drivers don't support getting large merged segments coming back | |
768cc2d3 LV |
297 | from *_map_sg(). |
298 | ||
299 | Most drivers don't have this problem; it is safe to say Y here. | |
14cf11af | 300 | |
fb3475e9 FT |
301 | config IOMMU_HELPER |
302 | def_bool PPC64 | |
303 | ||
ec3cf2ec BB |
304 | config SWIOTLB |
305 | bool "SWIOTLB support" | |
306 | default n | |
307 | select IOMMU_HELPER | |
308 | ---help--- | |
309 | Support for IO bounce buffering for systems without an IOMMU. | |
310 | This allows us to DMA to the full physical address space on | |
311 | platforms where the size of a physical address is larger | |
312 | than the bus address. Not all platforms support this. | |
313 | ||
14cf11af PM |
314 | config HOTPLUG_CPU |
315 | bool "Support for enabling/disabling CPUs" | |
316 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) | |
317 | ---help--- | |
318 | Say Y here to be able to disable and re-enable individual | |
319 | CPUs at runtime on SMP machines. | |
320 | ||
321 | Say N if you are unsure. | |
322 | ||
cc57637b YG |
323 | config ARCH_ENABLE_MEMORY_HOTPLUG |
324 | def_bool y | |
325 | ||
a99824f3 BP |
326 | config ARCH_HAS_WALK_MEMORY |
327 | def_bool y | |
328 | ||
1482471d BP |
329 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
330 | def_bool y | |
331 | ||
14cf11af PM |
332 | config KEXEC |
333 | bool "kexec system call (EXPERIMENTAL)" | |
cb93d568 | 334 | depends on PPC_BOOK3S && EXPERIMENTAL |
14cf11af PM |
335 | help |
336 | kexec is a system call that implements the ability to shutdown your | |
337 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 338 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
339 | you can start any kernel with it, not just Linux. |
340 | ||
1f1332f7 | 341 | The name comes from the similarity to the exec system call. |
14cf11af PM |
342 | |
343 | It is an ongoing process to be certain the hardware in a machine | |
344 | is properly shutdown, so do not be surprised if this code does not | |
345 | initially work for you. It may help to enable device hotplugging | |
346 | support. As of this writing the exact hardware interface is | |
347 | strongly in flux, so no good recommendation can be made. | |
348 | ||
e8625d46 | 349 | config CRASH_DUMP |
3420b5da | 350 | bool "Build a kdump crash kernel" |
c6ac71a1 MK |
351 | depends on PPC64 || 6xx |
352 | select RELOCATABLE if PPC64 | |
e8625d46 HM |
353 | help |
354 | Build a kernel suitable for use as a kdump capture kernel. | |
54622f10 MK |
355 | The same kernel binary can be used as production kernel and dump |
356 | capture kernel. | |
e8625d46 | 357 | |
242f271c MA |
358 | config PHYP_DUMP |
359 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" | |
360 | depends on PPC_PSERIES && EXPERIMENTAL | |
361 | help | |
362 | Hypervisor-assisted dump is meant to be a kdump replacement | |
363 | offering robustness and speed not possible without system | |
692105b8 | 364 | hypervisor assistance. |
242f271c MA |
365 | |
366 | If unsure, say "N" | |
367 | ||
14cf11af PM |
368 | config PPCBUG_NVRAM |
369 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
370 | default y if PPC_PREP | |
371 | ||
372 | config IRQ_ALL_CPUS | |
373 | bool "Distribute interrupts on all CPUs by default" | |
374 | depends on SMP && !MV64360 | |
375 | help | |
376 | This option gives the kernel permission to distribute IRQs across | |
377 | multiple CPUs. Saying N here will route all IRQs to the first | |
378 | CPU. Generally saying Y is safe, although some problems have been | |
379 | reported with SMP Power Macintoshes with this option enabled. | |
380 | ||
ffa27b6b AW |
381 | config NUMA |
382 | bool "NUMA support" | |
383 | depends on PPC64 | |
384 | default y if SMP && PPC_PSERIES | |
385 | ||
c80d79d7 YG |
386 | config NODES_SHIFT |
387 | int | |
ea55bf29 | 388 | default "8" if PPC64 |
c80d79d7 YG |
389 | default "4" |
390 | depends on NEED_MULTIPLE_NODES | |
391 | ||
ea55bf29 AB |
392 | config MAX_ACTIVE_REGIONS |
393 | int | |
394 | default "256" if PPC64 | |
395 | default "32" | |
396 | ||
14cf11af PM |
397 | config ARCH_SELECT_MEMORY_MODEL |
398 | def_bool y | |
399 | depends on PPC64 | |
400 | ||
401 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
402 | def_bool y |
403 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 404 | |
45fb6cea | 405 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 406 | def_bool y |
9100b205 | 407 | depends on PPC64 |
d29eff7b | 408 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 409 | |
45fb6cea | 410 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 411 | def_bool y |
78bde53e | 412 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 413 | |
c67c3cb4 | 414 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 415 | def_bool y |
c67c3cb4 | 416 | |
5a1eb5c4 BH |
417 | config SYS_SUPPORTS_HUGETLBFS |
418 | def_bool y | |
419 | depends on PPC_BOOK3S_64 | |
420 | ||
c67c3cb4 | 421 | source "mm/Kconfig" |
14cf11af | 422 | |
7e9191da MK |
423 | config ARCH_MEMORY_PROBE |
424 | def_bool y | |
425 | depends on MEMORY_HOTPLUG | |
426 | ||
75167957 AW |
427 | # Some NUMA nodes have memory ranges that span |
428 | # other nodes. Even though a pfn is valid and | |
429 | # between a node's start and end pfns, it may not | |
430 | # reside on that node. See memmap_init_zone() | |
431 | # for details. | |
432 | config NODES_SPAN_OTHER_NODES | |
433 | def_bool y | |
434 | depends on NEED_MULTIPLE_NODES | |
435 | ||
16c2d476 BH |
436 | config PPC_HAS_HASH_64K |
437 | bool | |
438 | depends on PPC64 | |
439 | default n | |
440 | ||
e1240122 YT |
441 | config STDBINUTILS |
442 | bool "Using standard binutils settings" | |
443 | depends on 44x | |
444 | default y | |
445 | help | |
446 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
447 | Note, that kernel will be able to run only those applications, | |
448 | which had been compiled using binutils later than 2.17.50.0.3 with | |
449 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
450 | the older binutils, you can patch them with a trivial patch, which | |
451 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
452 | ||
ca9153a3 IY |
453 | choice |
454 | prompt "Page size" | |
455 | default PPC_4K_PAGES | |
3c726f8d | 456 | help |
ca9153a3 IY |
457 | Select the kernel logical page size. Increasing the page size |
458 | will reduce software overhead at each page boundary, allow | |
459 | hardware prefetch mechanisms to be more effective, and allow | |
460 | larger dma transfers increasing IO efficiency and reducing | |
461 | overhead. However the utilization of memory will increase. | |
462 | For example, each cached file will using a multiple of the | |
463 | page size to hold its contents and the difference between the | |
464 | end of file and the end of page is wasted. | |
465 | ||
466 | Some dedicated systems, such as software raid serving with | |
467 | accelerated calculations, have shown significant increases. | |
468 | ||
469 | If you configure a 64 bit kernel for 64k pages but the | |
470 | processor does not support them, then the kernel will simulate | |
471 | them with 4k pages, loading them on demand, but with the | |
472 | reduced software overhead and larger internal fragmentation. | |
473 | For the 32 bit kernel, a large page option will not be offered | |
474 | unless it is supported by the configured processor. | |
475 | ||
476 | If unsure, choose 4K_PAGES. | |
477 | ||
478 | config PPC_4K_PAGES | |
479 | bool "4k page size" | |
480 | ||
481 | config PPC_16K_PAGES | |
482 | bool "16k page size" if 44x | |
483 | ||
484 | config PPC_64K_PAGES | |
2d27cfd3 | 485 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
ca9153a3 IY |
486 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
487 | ||
e1240122 YT |
488 | config PPC_256K_PAGES |
489 | bool "256k page size" if 44x | |
adf213c4 | 490 | depends on !STDBINUTILS |
e1240122 YT |
491 | help |
492 | Make the page size 256k. | |
493 | ||
494 | As the ELF standard only requires alignment to support page | |
495 | sizes up to 64k, you will need to compile all of your user | |
496 | space applications with a non-standard binutils settings | |
497 | (see the STDBINUTILS description for details). | |
498 | ||
499 | Say N unless you know what you are doing. | |
500 | ||
ca9153a3 | 501 | endchoice |
3c726f8d | 502 | |
53bcddb9 SR |
503 | config FORCE_MAX_ZONEORDER |
504 | int "Maximum zone order" | |
066c4b87 BH |
505 | range 9 64 if PPC64 && PPC_64K_PAGES |
506 | default "9" if PPC64 && PPC_64K_PAGES | |
507 | range 13 64 if PPC64 && !PPC_64K_PAGES | |
508 | default "13" if PPC64 && !PPC_64K_PAGES | |
509 | range 9 64 if PPC32 && PPC_16K_PAGES | |
510 | default "9" if PPC32 && PPC_16K_PAGES | |
511 | range 7 64 if PPC32 && PPC_64K_PAGES | |
512 | default "7" if PPC32 && PPC_64K_PAGES | |
513 | range 5 64 if PPC32 && PPC_256K_PAGES | |
514 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 515 | range 11 64 |
53bcddb9 SR |
516 | default "11" |
517 | help | |
518 | The kernel memory allocator divides physically contiguous memory | |
519 | blocks into "zones", where each zone is a power of two number of | |
520 | pages. This option selects the largest power of two that the kernel | |
521 | keeps in the memory allocator. If you need to allocate very large | |
522 | blocks of physically contiguous memory, then you may need to | |
523 | increase this value. | |
524 | ||
525 | This config option is actually maximum order plus one. For example, | |
526 | a value of 11 means that the largest free memory block is 2^10 pages. | |
527 | ||
528 | The page size is not necessarily 4KB. For example, on 64-bit | |
529 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
530 | this in mind when choosing a value for this option. | |
531 | ||
fa28237c PM |
532 | config PPC_SUBPAGE_PROT |
533 | bool "Support setting protections for 4k subpages" | |
ca9153a3 | 534 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
fa28237c PM |
535 | help |
536 | This option adds support for a system call to allow user programs | |
537 | to set access permissions (read/write, readonly, or no access) | |
538 | on the 4k subpages of each 64k page. | |
539 | ||
14cf11af PM |
540 | config SCHED_SMT |
541 | bool "SMT (Hyperthreading) scheduler support" | |
542 | depends on PPC64 && SMP | |
14cf11af PM |
543 | help |
544 | SMT scheduler support improves the CPU scheduler's decision making | |
545 | when dealing with POWER5 cpus at a cost of slightly increased | |
546 | overhead in some places. If unsure say N here. | |
547 | ||
548 | config PROC_DEVICETREE | |
5f296755 PM |
549 | bool "Support for device tree in /proc" |
550 | depends on PROC_FS | |
14cf11af PM |
551 | help |
552 | This option adds a device-tree directory under /proc which contains | |
553 | an image of the device tree that the kernel copies from Open | |
5f296755 | 554 | Firmware or other boot firmware. If unsure, say Y here. |
14cf11af | 555 | |
14cf11af PM |
556 | config CMDLINE_BOOL |
557 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
558 | |
559 | config CMDLINE | |
560 | string "Initial kernel command string" | |
561 | depends on CMDLINE_BOOL | |
562 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
563 | help | |
564 | On some platforms, there is currently no way for the boot loader to | |
565 | pass arguments to the kernel. For these platforms, you can supply | |
566 | some command-line options at build time by entering them here. In | |
567 | most cases you will need to specify the root device here. | |
568 | ||
c356aa45 GL |
569 | config EXTRA_TARGETS |
570 | string "Additional default image types" | |
571 | help | |
572 | List additional targets to be built by the bootwrapper here (separated | |
573 | by spaces). This is useful for targets that depend of device tree | |
574 | files in the .dts directory. | |
575 | ||
576 | Targets in this list will be build as part of the default build | |
577 | target, or when the user does a 'make zImage' or a | |
578 | 'make zImage.initrd'. | |
579 | ||
580 | If unsure, leave blank | |
581 | ||
14cf11af | 582 | if !44x || BROKEN |
b28f5081 JB |
583 | config ARCH_WANTS_FREEZER_CONTROL |
584 | def_bool y | |
585 | depends on ADB_PMU | |
586 | ||
14cf11af PM |
587 | source kernel/power/Kconfig |
588 | endif | |
589 | ||
590 | config SECCOMP | |
591 | bool "Enable seccomp to safely compute untrusted bytecode" | |
592 | depends on PROC_FS | |
593 | default y | |
594 | help | |
595 | This kernel feature is useful for number crunching applications | |
596 | that may need to compute untrusted bytecode during their | |
597 | execution. By using pipes or other transports made available to | |
598 | the process as file descriptors supporting the read/write | |
599 | syscalls, it's possible to isolate those applications in | |
600 | their own address space using seccomp. Once seccomp is | |
601 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
602 | and the task is only allowed to execute a few safe syscalls | |
603 | defined by each seccomp mode. | |
604 | ||
605 | If unsure, say Y. Only embedded should say N here. | |
606 | ||
607 | endmenu | |
608 | ||
609 | config ISA_DMA_API | |
610 | bool | |
373a6da1 | 611 | default !PPC_ISERIES || PCI |
14cf11af PM |
612 | |
613 | menu "Bus options" | |
614 | ||
615 | config ISA | |
616 | bool "Support for ISA-bus hardware" | |
617 | depends on PPC_PREP || PPC_CHRP | |
f9bd170a | 618 | select PPC_I8259 |
14cf11af PM |
619 | help |
620 | Find out whether you have ISA slots on your motherboard. ISA is the | |
621 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
622 | inside your box. If you have an Apple machine, say N here; if you | |
623 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If | |
624 | you have an embedded board, consult your board documentation. | |
625 | ||
5ac6da66 CL |
626 | config ZONE_DMA |
627 | bool | |
628 | default y | |
629 | ||
14cf11af PM |
630 | config GENERIC_ISA_DMA |
631 | bool | |
632 | depends on PPC64 || POWER4 || 6xx && !CPM2 | |
633 | default y | |
634 | ||
25635c71 PM |
635 | config PPC_INDIRECT_PCI |
636 | bool | |
637 | depends on PCI | |
63dafe57 | 638 | default y if 40x || 44x |
25635c71 PM |
639 | default n |
640 | ||
14cf11af PM |
641 | config EISA |
642 | bool | |
643 | ||
644 | config SBUS | |
645 | bool | |
646 | ||
08264cbc KG |
647 | config FSL_SOC |
648 | bool | |
649 | ||
55c44991 RZ |
650 | config FSL_PCI |
651 | bool | |
652 | select PPC_INDIRECT_PCI | |
d0839118 | 653 | select PCI_QUIRKS |
55c44991 | 654 | |
2a706919 SR |
655 | config 4xx_SOC |
656 | bool | |
657 | ||
acaa7aa3 AV |
658 | config FSL_LBC |
659 | bool | |
660 | help | |
661 | Freescale Localbus support | |
662 | ||
83ff9dcf AV |
663 | config FSL_GTM |
664 | bool | |
665 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
666 | help | |
667 | Freescale General-purpose Timers support | |
668 | ||
14cf11af PM |
669 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
670 | config MCA | |
671 | bool | |
672 | ||
b500563b JR |
673 | # Platforms that what PCI turned unconditionally just do select PCI |
674 | # in their config node. Platforms that want to choose at config | |
675 | # time should select PPC_PCI_CHOICE | |
676 | config PPC_PCI_CHOICE | |
677 | bool | |
678 | ||
14cf11af | 679 | config PCI |
b500563b JR |
680 | bool "PCI support" if PPC_PCI_CHOICE |
681 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
53158620 | 682 | && !PPC_85xx && !PPC_86xx |
f21f49ea | 683 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 684 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 685 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
686 | help |
687 | Find out whether your system includes a PCI bus. PCI is the name of | |
688 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
689 | your box. If you say Y here, the kernel will include drivers and | |
690 | infrastructure code to support PCI bus devices. | |
691 | ||
692 | config PCI_DOMAINS | |
36e23590 MW |
693 | def_bool PCI |
694 | ||
695 | config PCI_SYSCALL | |
696 | def_bool PCI | |
14cf11af | 697 | |
14cf11af PM |
698 | config PCI_QSPAN |
699 | bool "QSpan PCI" | |
700 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 701 | select PPC_I8259 |
14cf11af PM |
702 | help |
703 | Say Y here if you have a system based on a Motorola 8xx-series | |
704 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
705 | ||
706 | config PCI_8260 | |
707 | bool | |
708 | depends on PCI && 8260 | |
25635c71 | 709 | select PPC_INDIRECT_PCI |
14cf11af PM |
710 | default y |
711 | ||
712 | config 8260_PCI9 | |
4a3ecc62 | 713 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 714 | depends on PCI_8260 && !8272 |
14cf11af PM |
715 | default y |
716 | ||
717 | choice | |
4a3ecc62 | 718 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
719 | depends on 8260_PCI9 |
720 | ||
721 | config 8260_PCI9_IDMA1 | |
722 | bool "IDMA1" | |
723 | ||
724 | config 8260_PCI9_IDMA2 | |
725 | bool "IDMA2" | |
726 | ||
727 | config 8260_PCI9_IDMA3 | |
728 | bool "IDMA3" | |
729 | ||
730 | config 8260_PCI9_IDMA4 | |
731 | bool "IDMA4" | |
732 | ||
733 | endchoice | |
734 | ||
bb53bb3d JM |
735 | source "drivers/pci/pcie/Kconfig" |
736 | ||
14cf11af PM |
737 | source "drivers/pci/Kconfig" |
738 | ||
739 | source "drivers/pcmcia/Kconfig" | |
740 | ||
741 | source "drivers/pci/hotplug/Kconfig" | |
742 | ||
f1f389d5 ZW |
743 | config HAS_RAPIDIO |
744 | bool | |
745 | default n | |
746 | ||
747 | config RAPIDIO | |
748 | bool "RapidIO support" | |
749 | depends on HAS_RAPIDIO | |
750 | help | |
751 | If you say Y here, the kernel will include drivers and | |
752 | infrastructure code to support RapidIO interconnect devices. | |
753 | ||
754 | source "drivers/rapidio/Kconfig" | |
755 | ||
14cf11af PM |
756 | endmenu |
757 | ||
758 | menu "Advanced setup" | |
759 | depends on PPC32 | |
760 | ||
761 | config ADVANCED_OPTIONS | |
762 | bool "Prompt for advanced kernel configuration options" | |
763 | help | |
764 | This option will enable prompting for a variety of advanced kernel | |
765 | configuration options. These options can cause the kernel to not | |
766 | work if they are set incorrectly, but can be used to optimize certain | |
767 | aspects of kernel memory management. | |
768 | ||
769 | Unless you know what you are doing, say N here. | |
770 | ||
771 | comment "Default settings for advanced configuration options are used" | |
772 | depends on !ADVANCED_OPTIONS | |
773 | ||
14cf11af PM |
774 | config LOWMEM_SIZE_BOOL |
775 | bool "Set maximum low memory" | |
776 | depends on ADVANCED_OPTIONS | |
777 | help | |
778 | This option allows you to set the maximum amount of memory which | |
779 | will be used as "low memory", that is, memory which the kernel can | |
780 | access directly, without having to set up a kernel virtual mapping. | |
781 | This can be useful in optimizing the layout of kernel virtual | |
782 | memory. | |
783 | ||
784 | Say N here unless you know what you are doing. | |
785 | ||
786 | config LOWMEM_SIZE | |
787 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
788 | default "0x30000000" | |
789 | ||
96051465 TP |
790 | config LOWMEM_CAM_NUM_BOOL |
791 | bool "Set number of CAMs to use to map low memory" | |
792 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
793 | help | |
794 | This option allows you to set the maximum number of CAM slots that | |
795 | will be used to map low memory. There are a limited number of slots | |
796 | available and even more limited number that will fit in the L1 MMU. | |
797 | However, using more entries will allow mapping more low memory. This | |
798 | can be useful in optimizing the layout of kernel virtual memory. | |
799 | ||
800 | Say N here unless you know what you are doing. | |
801 | ||
802 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 803 | depends on FSL_BOOKE |
96051465 TP |
804 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
805 | default 3 | |
806 | ||
37dd2bad KG |
807 | config RELOCATABLE |
808 | bool "Build a relocatable kernel (EXPERIMENTAL)" | |
809 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
810 | help | |
811 | This builds a kernel image that is capable of running at the | |
812 | location the kernel is loaded at (some alignment restrictions may | |
813 | exist). | |
814 | ||
815 | One use is for the kexec on panic case where the recovery kernel | |
816 | must live at a different physical address than the primary | |
817 | kernel. | |
818 | ||
819 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
820 | it has been loaded at and the compile time physical addresses | |
821 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
822 | setting can still be useful to bootwrappers that need to know the | |
823 | load location of the kernel (eg. u-boot/mkimage). | |
824 | ||
825 | config PAGE_OFFSET_BOOL | |
826 | bool "Set custom page offset address" | |
827 | depends on ADVANCED_OPTIONS | |
828 | help | |
829 | This option allows you to set the kernel virtual address at which | |
830 | the kernel will map low memory. This can be useful in optimizing | |
831 | the virtual memory layout of the system. | |
832 | ||
833 | Say N here unless you know what you are doing. | |
834 | ||
835 | config PAGE_OFFSET | |
836 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
837 | default "0xc0000000" | |
838 | ||
14cf11af PM |
839 | config KERNEL_START_BOOL |
840 | bool "Set custom kernel base address" | |
841 | depends on ADVANCED_OPTIONS | |
842 | help | |
843 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
844 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
845 | however there are times (like kdump) that one might not want them | |
846 | to be the same. | |
14cf11af PM |
847 | |
848 | Say N here unless you know what you are doing. | |
849 | ||
850 | config KERNEL_START | |
851 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad KG |
852 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
853 | default "0xc2000000" if CRASH_DUMP | |
14cf11af PM |
854 | default "0xc0000000" |
855 | ||
37dd2bad KG |
856 | config PHYSICAL_START_BOOL |
857 | bool "Set physical address where the kernel is loaded" | |
858 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
859 | help | |
860 | This gives the physical address where the kernel is loaded. | |
861 | ||
862 | Say N here unless you know what you are doing. | |
863 | ||
864 | config PHYSICAL_START | |
865 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
866 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP | |
867 | default "0x00000000" | |
868 | ||
869 | config PHYSICAL_ALIGN | |
870 | hex | |
c8f3570b | 871 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
872 | help |
873 | This value puts the alignment restrictions on physical address | |
874 | where kernel is loaded and run from. Kernel is compiled for an | |
875 | address which meets above alignment restriction. | |
876 | ||
14cf11af PM |
877 | config TASK_SIZE_BOOL |
878 | bool "Set custom user task size" | |
879 | depends on ADVANCED_OPTIONS | |
880 | help | |
881 | This option allows you to set the amount of virtual address space | |
882 | allocated to user tasks. This can be useful in optimizing the | |
883 | virtual memory layout of the system. | |
884 | ||
885 | Say N here unless you know what you are doing. | |
886 | ||
887 | config TASK_SIZE | |
888 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
889 | default "0x80000000" if PPC_PREP || PPC_8xx |
890 | default "0xc0000000" | |
14cf11af | 891 | |
84532a0f BH |
892 | config CONSISTENT_SIZE_BOOL |
893 | bool "Set custom consistent memory pool size" | |
894 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
895 | help | |
896 | This option allows you to set the size of the | |
897 | consistent memory pool. This pool of virtual memory | |
898 | is used to make consistent memory allocations. | |
899 | ||
900 | config CONSISTENT_SIZE | |
901 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
902 | default "0x00200000" if NOT_COHERENT_CACHE | |
903 | ||
14cf11af PM |
904 | config PIN_TLB |
905 | bool "Pinned Kernel TLBs (860 ONLY)" | |
906 | depends on ADVANCED_OPTIONS && 8xx | |
907 | endmenu | |
908 | ||
cabb5587 | 909 | if PPC64 |
549e8152 PM |
910 | config RELOCATABLE |
911 | bool "Build a relocatable kernel" | |
912 | help | |
913 | This builds a kernel image that is capable of running anywhere | |
914 | in the RMA (real memory area) at any 16k-aligned base address. | |
915 | The kernel is linked as a position-independent executable (PIE) | |
916 | and contains dynamic relocations which are processed early | |
917 | in the bootup process. | |
918 | ||
919 | One use is for the kexec on panic case where the recovery kernel | |
920 | must live at a different physical address than the primary | |
921 | kernel. | |
922 | ||
37dd2bad KG |
923 | config PAGE_OFFSET |
924 | hex | |
925 | default "0xc000000000000000" | |
cabb5587 SR |
926 | config KERNEL_START |
927 | hex | |
eeb2d218 | 928 | default "0xc000000000000000" |
37dd2bad KG |
929 | config PHYSICAL_START |
930 | hex | |
37dd2bad | 931 | default "0x00000000" |
cabb5587 SR |
932 | endif |
933 | ||
14cf11af PM |
934 | source "net/Kconfig" |
935 | ||
936 | source "drivers/Kconfig" | |
937 | ||
938 | source "fs/Kconfig" | |
939 | ||
98658538 LY |
940 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
941 | ||
14cf11af PM |
942 | source "lib/Kconfig" |
943 | ||
14cf11af PM |
944 | source "arch/powerpc/Kconfig.debug" |
945 | ||
946 | source "security/Kconfig" | |
947 | ||
948 | config KEYS_COMPAT | |
949 | bool | |
950 | depends on COMPAT && KEYS | |
951 | default y | |
952 | ||
953 | source "crypto/Kconfig" | |
6f668280 DP |
954 | |
955 | config PPC_CLOCK | |
956 | bool | |
957 | default n | |
9483a578 | 958 | select HAVE_CLK |
1088a209 SM |
959 | |
960 | config PPC_LIB_RHEAP | |
961 | bool | |
962 | ||
bbf45ba5 | 963 | source "arch/powerpc/kvm/Kconfig" |