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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 | ||
551b81f2 ME |
59 | config NR_IRQS |
60 | int "Number of virtual interrupt numbers" | |
859aefc5 | 61 | range 32 32768 |
551b81f2 ME |
62 | default "512" |
63 | help | |
64 | This defines the number of virtual interrupt numbers the kernel | |
65 | can manage. Virtual interrupt numbers are what you see in | |
66 | /proc/interrupts. If you configure your system to have too few, | |
67 | drivers will fail to load or worse - handle with care. | |
68 | ||
fd3e0bbc CH |
69 | config STACKTRACE_SUPPORT |
70 | bool | |
71 | default y | |
72 | ||
01f4b8b8 AB |
73 | config HAVE_LATENCYTOP_SUPPORT |
74 | def_bool y | |
75 | ||
945feb17 BH |
76 | config TRACE_IRQFLAGS_SUPPORT |
77 | bool | |
945feb17 BH |
78 | default y |
79 | ||
80 | config LOCKDEP_SUPPORT | |
81 | bool | |
82 | default y | |
83 | ||
14cf11af PM |
84 | config RWSEM_GENERIC_SPINLOCK |
85 | bool | |
86 | ||
87 | config RWSEM_XCHGADD_ALGORITHM | |
88 | bool | |
89 | default y | |
90 | ||
95c354fe NP |
91 | config GENERIC_LOCKBREAK |
92 | bool | |
93 | default y | |
94 | depends on SMP && PREEMPT | |
95 | ||
f0d1b0b3 DH |
96 | config ARCH_HAS_ILOG2_U32 |
97 | bool | |
ef55d53c | 98 | default y |
f0d1b0b3 DH |
99 | |
100 | config ARCH_HAS_ILOG2_U64 | |
101 | bool | |
ef55d53c | 102 | default y if 64BIT |
f0d1b0b3 | 103 | |
e779b2f9 AM |
104 | config GENERIC_HWEIGHT |
105 | bool | |
106 | default y | |
107 | ||
0a9cb46a JM |
108 | config GENERIC_FIND_NEXT_BIT |
109 | bool | |
110 | default y | |
111 | ||
b7ce3415 AV |
112 | config GENERIC_GPIO |
113 | bool | |
114 | help | |
115 | Generic GPIO API support | |
116 | ||
f057eac0 SR |
117 | config ARCH_NO_VIRT_TO_BUS |
118 | def_bool PPC64 | |
119 | ||
14cf11af PM |
120 | config PPC |
121 | bool | |
122 | default y | |
10f85f43 SR |
123 | select OF |
124 | select OF_FLATTREE | |
2b79d696 SR |
125 | select HAVE_FTRACE_MCOUNT_RECORD |
126 | select HAVE_DYNAMIC_FTRACE | |
606576ce | 127 | select HAVE_FUNCTION_TRACER |
60ce8f72 | 128 | select HAVE_FUNCTION_GRAPH_TRACER |
7444a72e | 129 | select ARCH_WANT_OPTIONAL_GPIOLIB |
ec7748b5 | 130 | select HAVE_IDE |
a1f242ff | 131 | select HAVE_IOREMAP_PROT |
58340a07 | 132 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
3f550096 | 133 | select HAVE_KPROBES |
17ce452f | 134 | select HAVE_ARCH_KGDB |
9edddaa2 | 135 | select HAVE_KRETPROBES |
dec2b0d0 | 136 | select HAVE_ARCH_TRACEHOOK |
d9b2b2a2 | 137 | select HAVE_LMB |
46bab4e4 | 138 | select HAVE_DMA_ATTRS |
80d3e8ab | 139 | select HAVE_DMA_API_DEBUG |
b7d7a240 | 140 | select USE_GENERIC_SMP_HELPERS if SMP |
4e491d14 | 141 | select HAVE_OPROFILE |
ee6a0932 | 142 | select HAVE_SYSCALL_WRAPPERS if PPC64 |
c2e95c6d | 143 | select GENERIC_ATOMIC64 if PPC32 |
cdd6c482 | 144 | select HAVE_PERF_EVENTS |
359e4284 | 145 | select HAVE_REGS_AND_STACK_ACCESS_API |
14cf11af PM |
146 | |
147 | config EARLY_PRINTK | |
148 | bool | |
51d3082f | 149 | default y |
14cf11af PM |
150 | |
151 | config COMPAT | |
152 | bool | |
153 | default y if PPC64 | |
01e31dba | 154 | select COMPAT_BINFMT_ELF |
14cf11af PM |
155 | |
156 | config SYSVIPC_COMPAT | |
157 | bool | |
158 | depends on COMPAT && SYSVIPC | |
159 | default y | |
160 | ||
161 | # All PPC32s use generic nvram driver through ppc_md | |
162 | config GENERIC_NVRAM | |
163 | bool | |
164 | default y if PPC32 | |
165 | ||
ae1e9130 | 166 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
167 | bool |
168 | default y | |
169 | ||
170 | config ARCH_MAY_HAVE_PC_FDC | |
171 | bool | |
bed59275 | 172 | default !PPC_PSERIES || PCI |
14cf11af | 173 | |
08264cbc KG |
174 | config PPC_OF |
175 | def_bool y | |
176 | ||
97e873e5 | 177 | config OF |
10f85f43 | 178 | bool |
97e873e5 | 179 | |
08264cbc KG |
180 | config PPC_UDBG_16550 |
181 | bool | |
182 | default n | |
183 | ||
08264cbc KG |
184 | config GENERIC_TBSYNC |
185 | bool | |
186 | default y if PPC32 && SMP | |
187 | default n | |
188 | ||
e65e1fc2 AV |
189 | config AUDIT_ARCH |
190 | bool | |
191 | default y | |
192 | ||
73c9ceab JF |
193 | config GENERIC_BUG |
194 | bool | |
195 | default y | |
196 | depends on BUG | |
197 | ||
b3028878 | 198 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 199 | default y if PMAC_APM_EMU |
b3028878 JB |
200 | bool |
201 | ||
9fffb55f DG |
202 | config DTC |
203 | bool | |
204 | default y | |
205 | ||
f4fc4a5b KG |
206 | config DEFAULT_UIMAGE |
207 | bool | |
208 | help | |
209 | Used to allow a board to specify it wants a uImage built by default | |
210 | default n | |
211 | ||
b09c1644 SW |
212 | config REDBOOT |
213 | bool | |
214 | ||
801e4062 JB |
215 | config ARCH_HIBERNATION_POSSIBLE |
216 | bool | |
543b9fd3 JB |
217 | default y |
218 | ||
f4cb5700 JB |
219 | config ARCH_SUSPEND_POSSIBLE |
220 | def_bool y | |
4ffd6952 AV |
221 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
222 | PPC_85xx || PPC_86xx | |
f4cb5700 | 223 | |
4c75a6f4 BH |
224 | config PPC_DCR_NATIVE |
225 | bool | |
226 | default n | |
227 | ||
228 | config PPC_DCR_MMIO | |
229 | bool | |
230 | default n | |
231 | ||
232 | config PPC_DCR | |
233 | bool | |
234 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
235 | default y | |
236 | ||
4c9d2800 BH |
237 | config PPC_OF_PLATFORM_PCI |
238 | bool | |
373a6da1 | 239 | depends on PCI |
4c9d2800 BH |
240 | depends on PPC64 # not supported on 32 bits yet |
241 | default n | |
242 | ||
6a11f75b AM |
243 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
244 | def_bool y | |
245 | ||
172ae2e7 DK |
246 | config PPC_ADV_DEBUG_REGS |
247 | bool | |
248 | depends on 40x || BOOKE | |
249 | default y | |
250 | ||
251 | config PPC_ADV_DEBUG_IACS | |
252 | int | |
253 | depends on PPC_ADV_DEBUG_REGS | |
254 | default 4 if 44x | |
255 | default 2 | |
256 | ||
257 | config PPC_ADV_DEBUG_DACS | |
258 | int | |
259 | depends on PPC_ADV_DEBUG_REGS | |
260 | default 2 | |
261 | ||
262 | config PPC_ADV_DEBUG_DVCS | |
263 | int | |
264 | depends on PPC_ADV_DEBUG_REGS | |
265 | default 2 if 44x | |
266 | default 0 | |
267 | ||
268 | config PPC_ADV_DEBUG_DAC_RANGE | |
269 | bool | |
270 | depends on PPC_ADV_DEBUG_REGS && 44x | |
271 | default y | |
272 | ||
14cf11af PM |
273 | source "init/Kconfig" |
274 | ||
dc52ddc0 MH |
275 | source "kernel/Kconfig.freezer" |
276 | ||
a2d2e1ec | 277 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 278 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 279 | |
14cf11af PM |
280 | menu "Kernel options" |
281 | ||
282 | config HIGHMEM | |
283 | bool "High memory support" | |
284 | depends on PPC32 | |
285 | ||
1ad74998 | 286 | source kernel/time/Kconfig |
14cf11af PM |
287 | source kernel/Kconfig.hz |
288 | source kernel/Kconfig.preempt | |
289 | source "fs/Kconfig.binfmt" | |
290 | ||
ba72cb8c MG |
291 | config HUGETLB_PAGE_SIZE_VARIABLE |
292 | bool | |
293 | depends on HUGETLB_PAGE | |
294 | default y | |
295 | ||
14cf11af PM |
296 | config MATH_EMULATION |
297 | bool "Math emulation" | |
4d52719a | 298 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
299 | ---help--- |
300 | Some PowerPC chips designed for embedded applications do not have | |
301 | a floating-point unit and therefore do not implement the | |
302 | floating-point instructions in the PowerPC instruction set. If you | |
303 | say Y here, the kernel will include code to emulate a floating-point | |
304 | unit, which will allow programs that use floating-point | |
305 | instructions to run. | |
306 | ||
5dd57a13 SW |
307 | config 8XX_MINIMAL_FPEMU |
308 | bool "Minimal math emulation for 8xx" | |
309 | depends on 8xx && !MATH_EMULATION | |
310 | help | |
311 | Older arch/ppc kernels still emulated a few floating point | |
312 | instructions such as load and store, even when full math | |
313 | emulation is disabled. Say "Y" here if you want to preserve | |
314 | this behavior. | |
315 | ||
316 | It is recommended that you build a soft-float userspace instead. | |
317 | ||
fb3475e9 FT |
318 | config IOMMU_HELPER |
319 | def_bool PPC64 | |
320 | ||
ec3cf2ec BB |
321 | config SWIOTLB |
322 | bool "SWIOTLB support" | |
323 | default n | |
324 | select IOMMU_HELPER | |
325 | ---help--- | |
326 | Support for IO bounce buffering for systems without an IOMMU. | |
327 | This allows us to DMA to the full physical address space on | |
328 | platforms where the size of a physical address is larger | |
329 | than the bus address. Not all platforms support this. | |
330 | ||
14cf11af PM |
331 | config HOTPLUG_CPU |
332 | bool "Support for enabling/disabling CPUs" | |
333 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) | |
334 | ---help--- | |
335 | Say Y here to be able to disable and re-enable individual | |
336 | CPUs at runtime on SMP machines. | |
337 | ||
338 | Say N if you are unsure. | |
339 | ||
12633e80 NF |
340 | config ARCH_CPU_PROBE_RELEASE |
341 | def_bool y | |
342 | depends on HOTPLUG_CPU | |
343 | ||
cc57637b YG |
344 | config ARCH_ENABLE_MEMORY_HOTPLUG |
345 | def_bool y | |
346 | ||
a99824f3 BP |
347 | config ARCH_HAS_WALK_MEMORY |
348 | def_bool y | |
349 | ||
1482471d BP |
350 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
351 | def_bool y | |
352 | ||
14cf11af PM |
353 | config KEXEC |
354 | bool "kexec system call (EXPERIMENTAL)" | |
b3df895a | 355 | depends on (PPC_BOOK3S || (FSL_BOOKE && !SMP)) && EXPERIMENTAL |
14cf11af PM |
356 | help |
357 | kexec is a system call that implements the ability to shutdown your | |
358 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 359 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
360 | you can start any kernel with it, not just Linux. |
361 | ||
1f1332f7 | 362 | The name comes from the similarity to the exec system call. |
14cf11af PM |
363 | |
364 | It is an ongoing process to be certain the hardware in a machine | |
365 | is properly shutdown, so do not be surprised if this code does not | |
366 | initially work for you. It may help to enable device hotplugging | |
367 | support. As of this writing the exact hardware interface is | |
368 | strongly in flux, so no good recommendation can be made. | |
369 | ||
e8625d46 | 370 | config CRASH_DUMP |
3420b5da | 371 | bool "Build a kdump crash kernel" |
c6ac71a1 MK |
372 | depends on PPC64 || 6xx |
373 | select RELOCATABLE if PPC64 | |
e8625d46 HM |
374 | help |
375 | Build a kernel suitable for use as a kdump capture kernel. | |
54622f10 MK |
376 | The same kernel binary can be used as production kernel and dump |
377 | capture kernel. | |
e8625d46 | 378 | |
242f271c MA |
379 | config PHYP_DUMP |
380 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" | |
381 | depends on PPC_PSERIES && EXPERIMENTAL | |
382 | help | |
383 | Hypervisor-assisted dump is meant to be a kdump replacement | |
384 | offering robustness and speed not possible without system | |
692105b8 | 385 | hypervisor assistance. |
242f271c MA |
386 | |
387 | If unsure, say "N" | |
388 | ||
14cf11af PM |
389 | config PPCBUG_NVRAM |
390 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
391 | default y if PPC_PREP | |
392 | ||
393 | config IRQ_ALL_CPUS | |
394 | bool "Distribute interrupts on all CPUs by default" | |
395 | depends on SMP && !MV64360 | |
396 | help | |
397 | This option gives the kernel permission to distribute IRQs across | |
398 | multiple CPUs. Saying N here will route all IRQs to the first | |
399 | CPU. Generally saying Y is safe, although some problems have been | |
400 | reported with SMP Power Macintoshes with this option enabled. | |
401 | ||
cd015707 ME |
402 | config SPARSE_IRQ |
403 | bool "Support sparse irq numbering" | |
404 | default y | |
405 | help | |
406 | This enables support for sparse irqs. This is useful for distro | |
407 | kernels that want to define a high CONFIG_NR_CPUS value but still | |
408 | want to have low kernel memory footprint on smaller machines. | |
409 | ||
410 | ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread | |
411 | out the irq_desc[] array in a more NUMA-friendly way. ) | |
412 | ||
413 | If you don't know what to do here, say Y. | |
414 | ||
ffa27b6b AW |
415 | config NUMA |
416 | bool "NUMA support" | |
417 | depends on PPC64 | |
418 | default y if SMP && PPC_PSERIES | |
419 | ||
c80d79d7 YG |
420 | config NODES_SHIFT |
421 | int | |
ea55bf29 | 422 | default "8" if PPC64 |
c80d79d7 YG |
423 | default "4" |
424 | depends on NEED_MULTIPLE_NODES | |
425 | ||
ea55bf29 AB |
426 | config MAX_ACTIVE_REGIONS |
427 | int | |
428 | default "256" if PPC64 | |
429 | default "32" | |
430 | ||
14cf11af PM |
431 | config ARCH_SELECT_MEMORY_MODEL |
432 | def_bool y | |
433 | depends on PPC64 | |
434 | ||
435 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
436 | def_bool y |
437 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 438 | |
45fb6cea | 439 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 440 | def_bool y |
9100b205 | 441 | depends on PPC64 |
d29eff7b | 442 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 443 | |
45fb6cea | 444 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 445 | def_bool y |
78bde53e | 446 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 447 | |
c67c3cb4 | 448 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 449 | def_bool y |
c67c3cb4 | 450 | |
5a1eb5c4 BH |
451 | config SYS_SUPPORTS_HUGETLBFS |
452 | def_bool y | |
453 | depends on PPC_BOOK3S_64 | |
454 | ||
c67c3cb4 | 455 | source "mm/Kconfig" |
14cf11af | 456 | |
7e9191da MK |
457 | config ARCH_MEMORY_PROBE |
458 | def_bool y | |
459 | depends on MEMORY_HOTPLUG | |
460 | ||
75167957 AW |
461 | # Some NUMA nodes have memory ranges that span |
462 | # other nodes. Even though a pfn is valid and | |
463 | # between a node's start and end pfns, it may not | |
464 | # reside on that node. See memmap_init_zone() | |
465 | # for details. | |
466 | config NODES_SPAN_OTHER_NODES | |
467 | def_bool y | |
468 | depends on NEED_MULTIPLE_NODES | |
469 | ||
16c2d476 BH |
470 | config PPC_HAS_HASH_64K |
471 | bool | |
472 | depends on PPC64 | |
473 | default n | |
474 | ||
e1240122 YT |
475 | config STDBINUTILS |
476 | bool "Using standard binutils settings" | |
477 | depends on 44x | |
478 | default y | |
479 | help | |
480 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
481 | Note, that kernel will be able to run only those applications, | |
482 | which had been compiled using binutils later than 2.17.50.0.3 with | |
483 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
484 | the older binutils, you can patch them with a trivial patch, which | |
485 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
486 | ||
ca9153a3 IY |
487 | choice |
488 | prompt "Page size" | |
489 | default PPC_4K_PAGES | |
3c726f8d | 490 | help |
ca9153a3 IY |
491 | Select the kernel logical page size. Increasing the page size |
492 | will reduce software overhead at each page boundary, allow | |
493 | hardware prefetch mechanisms to be more effective, and allow | |
494 | larger dma transfers increasing IO efficiency and reducing | |
495 | overhead. However the utilization of memory will increase. | |
496 | For example, each cached file will using a multiple of the | |
497 | page size to hold its contents and the difference between the | |
498 | end of file and the end of page is wasted. | |
499 | ||
500 | Some dedicated systems, such as software raid serving with | |
501 | accelerated calculations, have shown significant increases. | |
502 | ||
503 | If you configure a 64 bit kernel for 64k pages but the | |
504 | processor does not support them, then the kernel will simulate | |
505 | them with 4k pages, loading them on demand, but with the | |
506 | reduced software overhead and larger internal fragmentation. | |
507 | For the 32 bit kernel, a large page option will not be offered | |
508 | unless it is supported by the configured processor. | |
509 | ||
510 | If unsure, choose 4K_PAGES. | |
511 | ||
512 | config PPC_4K_PAGES | |
513 | bool "4k page size" | |
514 | ||
515 | config PPC_16K_PAGES | |
516 | bool "16k page size" if 44x | |
517 | ||
518 | config PPC_64K_PAGES | |
2d27cfd3 | 519 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
ca9153a3 IY |
520 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
521 | ||
e1240122 YT |
522 | config PPC_256K_PAGES |
523 | bool "256k page size" if 44x | |
adf213c4 | 524 | depends on !STDBINUTILS |
e1240122 YT |
525 | help |
526 | Make the page size 256k. | |
527 | ||
528 | As the ELF standard only requires alignment to support page | |
529 | sizes up to 64k, you will need to compile all of your user | |
530 | space applications with a non-standard binutils settings | |
531 | (see the STDBINUTILS description for details). | |
532 | ||
533 | Say N unless you know what you are doing. | |
534 | ||
ca9153a3 | 535 | endchoice |
3c726f8d | 536 | |
53bcddb9 SR |
537 | config FORCE_MAX_ZONEORDER |
538 | int "Maximum zone order" | |
066c4b87 BH |
539 | range 9 64 if PPC64 && PPC_64K_PAGES |
540 | default "9" if PPC64 && PPC_64K_PAGES | |
541 | range 13 64 if PPC64 && !PPC_64K_PAGES | |
542 | default "13" if PPC64 && !PPC_64K_PAGES | |
543 | range 9 64 if PPC32 && PPC_16K_PAGES | |
544 | default "9" if PPC32 && PPC_16K_PAGES | |
545 | range 7 64 if PPC32 && PPC_64K_PAGES | |
546 | default "7" if PPC32 && PPC_64K_PAGES | |
547 | range 5 64 if PPC32 && PPC_256K_PAGES | |
548 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 549 | range 11 64 |
53bcddb9 SR |
550 | default "11" |
551 | help | |
552 | The kernel memory allocator divides physically contiguous memory | |
553 | blocks into "zones", where each zone is a power of two number of | |
554 | pages. This option selects the largest power of two that the kernel | |
555 | keeps in the memory allocator. If you need to allocate very large | |
556 | blocks of physically contiguous memory, then you may need to | |
557 | increase this value. | |
558 | ||
559 | This config option is actually maximum order plus one. For example, | |
560 | a value of 11 means that the largest free memory block is 2^10 pages. | |
561 | ||
562 | The page size is not necessarily 4KB. For example, on 64-bit | |
563 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
564 | this in mind when choosing a value for this option. | |
565 | ||
fa28237c PM |
566 | config PPC_SUBPAGE_PROT |
567 | bool "Support setting protections for 4k subpages" | |
ca9153a3 | 568 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
fa28237c PM |
569 | help |
570 | This option adds support for a system call to allow user programs | |
571 | to set access permissions (read/write, readonly, or no access) | |
572 | on the 4k subpages of each 64k page. | |
573 | ||
14cf11af PM |
574 | config SCHED_SMT |
575 | bool "SMT (Hyperthreading) scheduler support" | |
576 | depends on PPC64 && SMP | |
14cf11af PM |
577 | help |
578 | SMT scheduler support improves the CPU scheduler's decision making | |
579 | when dealing with POWER5 cpus at a cost of slightly increased | |
580 | overhead in some places. If unsure say N here. | |
581 | ||
582 | config PROC_DEVICETREE | |
5f296755 PM |
583 | bool "Support for device tree in /proc" |
584 | depends on PROC_FS | |
14cf11af PM |
585 | help |
586 | This option adds a device-tree directory under /proc which contains | |
587 | an image of the device tree that the kernel copies from Open | |
5f296755 | 588 | Firmware or other boot firmware. If unsure, say Y here. |
14cf11af | 589 | |
14cf11af PM |
590 | config CMDLINE_BOOL |
591 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
592 | |
593 | config CMDLINE | |
594 | string "Initial kernel command string" | |
595 | depends on CMDLINE_BOOL | |
596 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
597 | help | |
598 | On some platforms, there is currently no way for the boot loader to | |
599 | pass arguments to the kernel. For these platforms, you can supply | |
600 | some command-line options at build time by entering them here. In | |
601 | most cases you will need to specify the root device here. | |
602 | ||
c356aa45 GL |
603 | config EXTRA_TARGETS |
604 | string "Additional default image types" | |
605 | help | |
606 | List additional targets to be built by the bootwrapper here (separated | |
607 | by spaces). This is useful for targets that depend of device tree | |
608 | files in the .dts directory. | |
609 | ||
610 | Targets in this list will be build as part of the default build | |
611 | target, or when the user does a 'make zImage' or a | |
612 | 'make zImage.initrd'. | |
613 | ||
614 | If unsure, leave blank | |
615 | ||
14cf11af | 616 | if !44x || BROKEN |
b28f5081 JB |
617 | config ARCH_WANTS_FREEZER_CONTROL |
618 | def_bool y | |
619 | depends on ADB_PMU | |
620 | ||
14cf11af PM |
621 | source kernel/power/Kconfig |
622 | endif | |
623 | ||
624 | config SECCOMP | |
625 | bool "Enable seccomp to safely compute untrusted bytecode" | |
626 | depends on PROC_FS | |
627 | default y | |
628 | help | |
629 | This kernel feature is useful for number crunching applications | |
630 | that may need to compute untrusted bytecode during their | |
631 | execution. By using pipes or other transports made available to | |
632 | the process as file descriptors supporting the read/write | |
633 | syscalls, it's possible to isolate those applications in | |
634 | their own address space using seccomp. Once seccomp is | |
635 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
636 | and the task is only allowed to execute a few safe syscalls | |
637 | defined by each seccomp mode. | |
638 | ||
639 | If unsure, say Y. Only embedded should say N here. | |
640 | ||
641 | endmenu | |
642 | ||
643 | config ISA_DMA_API | |
644 | bool | |
373a6da1 | 645 | default !PPC_ISERIES || PCI |
14cf11af PM |
646 | |
647 | menu "Bus options" | |
648 | ||
649 | config ISA | |
650 | bool "Support for ISA-bus hardware" | |
651 | depends on PPC_PREP || PPC_CHRP | |
f9bd170a | 652 | select PPC_I8259 |
14cf11af PM |
653 | help |
654 | Find out whether you have ISA slots on your motherboard. ISA is the | |
655 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
656 | inside your box. If you have an Apple machine, say N here; if you | |
657 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If | |
658 | you have an embedded board, consult your board documentation. | |
659 | ||
5ac6da66 CL |
660 | config ZONE_DMA |
661 | bool | |
662 | default y | |
663 | ||
af407c6d FT |
664 | config NEED_DMA_MAP_STATE |
665 | def_bool (PPC64 || NOT_COHERENT_CACHE) | |
666 | ||
e32205eb FT |
667 | config NEED_SG_DMA_LENGTH |
668 | def_bool y | |
669 | ||
14cf11af PM |
670 | config GENERIC_ISA_DMA |
671 | bool | |
672 | depends on PPC64 || POWER4 || 6xx && !CPM2 | |
673 | default y | |
674 | ||
25635c71 PM |
675 | config PPC_INDIRECT_PCI |
676 | bool | |
677 | depends on PCI | |
63dafe57 | 678 | default y if 40x || 44x |
25635c71 PM |
679 | default n |
680 | ||
14cf11af PM |
681 | config EISA |
682 | bool | |
683 | ||
684 | config SBUS | |
685 | bool | |
686 | ||
08264cbc KG |
687 | config FSL_SOC |
688 | bool | |
689 | ||
55c44991 RZ |
690 | config FSL_PCI |
691 | bool | |
692 | select PPC_INDIRECT_PCI | |
d0839118 | 693 | select PCI_QUIRKS |
55c44991 | 694 | |
4ffd6952 AV |
695 | config FSL_PMC |
696 | bool | |
697 | default y | |
698 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
699 | help | |
700 | Freescale MPC85xx/MPC86xx power management controller support | |
701 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
702 | ||
2a706919 SR |
703 | config 4xx_SOC |
704 | bool | |
705 | ||
acaa7aa3 AV |
706 | config FSL_LBC |
707 | bool | |
708 | help | |
709 | Freescale Localbus support | |
710 | ||
83ff9dcf AV |
711 | config FSL_GTM |
712 | bool | |
713 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
714 | help | |
715 | Freescale General-purpose Timers support | |
716 | ||
14cf11af PM |
717 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
718 | config MCA | |
719 | bool | |
720 | ||
b500563b JR |
721 | # Platforms that what PCI turned unconditionally just do select PCI |
722 | # in their config node. Platforms that want to choose at config | |
723 | # time should select PPC_PCI_CHOICE | |
724 | config PPC_PCI_CHOICE | |
725 | bool | |
726 | ||
14cf11af | 727 | config PCI |
b500563b JR |
728 | bool "PCI support" if PPC_PCI_CHOICE |
729 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
bcc48591 | 730 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
f21f49ea | 731 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 732 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 733 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
734 | help |
735 | Find out whether your system includes a PCI bus. PCI is the name of | |
736 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
737 | your box. If you say Y here, the kernel will include drivers and | |
738 | infrastructure code to support PCI bus devices. | |
739 | ||
740 | config PCI_DOMAINS | |
36e23590 MW |
741 | def_bool PCI |
742 | ||
743 | config PCI_SYSCALL | |
744 | def_bool PCI | |
14cf11af | 745 | |
14cf11af PM |
746 | config PCI_QSPAN |
747 | bool "QSpan PCI" | |
748 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 749 | select PPC_I8259 |
14cf11af PM |
750 | help |
751 | Say Y here if you have a system based on a Motorola 8xx-series | |
752 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
753 | ||
754 | config PCI_8260 | |
755 | bool | |
756 | depends on PCI && 8260 | |
25635c71 | 757 | select PPC_INDIRECT_PCI |
14cf11af PM |
758 | default y |
759 | ||
760 | config 8260_PCI9 | |
4a3ecc62 | 761 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 762 | depends on PCI_8260 && !8272 |
14cf11af PM |
763 | default y |
764 | ||
765 | choice | |
4a3ecc62 | 766 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
767 | depends on 8260_PCI9 |
768 | ||
769 | config 8260_PCI9_IDMA1 | |
770 | bool "IDMA1" | |
771 | ||
772 | config 8260_PCI9_IDMA2 | |
773 | bool "IDMA2" | |
774 | ||
775 | config 8260_PCI9_IDMA3 | |
776 | bool "IDMA3" | |
777 | ||
778 | config 8260_PCI9_IDMA4 | |
779 | bool "IDMA4" | |
780 | ||
781 | endchoice | |
782 | ||
bb53bb3d JM |
783 | source "drivers/pci/pcie/Kconfig" |
784 | ||
14cf11af PM |
785 | source "drivers/pci/Kconfig" |
786 | ||
787 | source "drivers/pcmcia/Kconfig" | |
788 | ||
789 | source "drivers/pci/hotplug/Kconfig" | |
790 | ||
f1f389d5 ZW |
791 | config HAS_RAPIDIO |
792 | bool | |
793 | default n | |
794 | ||
795 | config RAPIDIO | |
796 | bool "RapidIO support" | |
797 | depends on HAS_RAPIDIO | |
798 | help | |
799 | If you say Y here, the kernel will include drivers and | |
800 | infrastructure code to support RapidIO interconnect devices. | |
801 | ||
802 | source "drivers/rapidio/Kconfig" | |
803 | ||
14cf11af PM |
804 | endmenu |
805 | ||
806 | menu "Advanced setup" | |
807 | depends on PPC32 | |
808 | ||
809 | config ADVANCED_OPTIONS | |
810 | bool "Prompt for advanced kernel configuration options" | |
811 | help | |
812 | This option will enable prompting for a variety of advanced kernel | |
813 | configuration options. These options can cause the kernel to not | |
814 | work if they are set incorrectly, but can be used to optimize certain | |
815 | aspects of kernel memory management. | |
816 | ||
817 | Unless you know what you are doing, say N here. | |
818 | ||
819 | comment "Default settings for advanced configuration options are used" | |
820 | depends on !ADVANCED_OPTIONS | |
821 | ||
14cf11af PM |
822 | config LOWMEM_SIZE_BOOL |
823 | bool "Set maximum low memory" | |
824 | depends on ADVANCED_OPTIONS | |
825 | help | |
826 | This option allows you to set the maximum amount of memory which | |
827 | will be used as "low memory", that is, memory which the kernel can | |
828 | access directly, without having to set up a kernel virtual mapping. | |
829 | This can be useful in optimizing the layout of kernel virtual | |
830 | memory. | |
831 | ||
832 | Say N here unless you know what you are doing. | |
833 | ||
834 | config LOWMEM_SIZE | |
835 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
836 | default "0x30000000" | |
837 | ||
96051465 TP |
838 | config LOWMEM_CAM_NUM_BOOL |
839 | bool "Set number of CAMs to use to map low memory" | |
840 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
841 | help | |
842 | This option allows you to set the maximum number of CAM slots that | |
843 | will be used to map low memory. There are a limited number of slots | |
844 | available and even more limited number that will fit in the L1 MMU. | |
845 | However, using more entries will allow mapping more low memory. This | |
846 | can be useful in optimizing the layout of kernel virtual memory. | |
847 | ||
848 | Say N here unless you know what you are doing. | |
849 | ||
850 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 851 | depends on FSL_BOOKE |
96051465 TP |
852 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
853 | default 3 | |
854 | ||
37dd2bad KG |
855 | config RELOCATABLE |
856 | bool "Build a relocatable kernel (EXPERIMENTAL)" | |
857 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
858 | help | |
859 | This builds a kernel image that is capable of running at the | |
860 | location the kernel is loaded at (some alignment restrictions may | |
861 | exist). | |
862 | ||
863 | One use is for the kexec on panic case where the recovery kernel | |
864 | must live at a different physical address than the primary | |
865 | kernel. | |
866 | ||
867 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
868 | it has been loaded at and the compile time physical addresses | |
869 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
870 | setting can still be useful to bootwrappers that need to know the | |
871 | load location of the kernel (eg. u-boot/mkimage). | |
872 | ||
873 | config PAGE_OFFSET_BOOL | |
874 | bool "Set custom page offset address" | |
875 | depends on ADVANCED_OPTIONS | |
876 | help | |
877 | This option allows you to set the kernel virtual address at which | |
878 | the kernel will map low memory. This can be useful in optimizing | |
879 | the virtual memory layout of the system. | |
880 | ||
881 | Say N here unless you know what you are doing. | |
882 | ||
883 | config PAGE_OFFSET | |
884 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
885 | default "0xc0000000" | |
886 | ||
14cf11af PM |
887 | config KERNEL_START_BOOL |
888 | bool "Set custom kernel base address" | |
889 | depends on ADVANCED_OPTIONS | |
890 | help | |
891 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
892 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
893 | however there are times (like kdump) that one might not want them | |
894 | to be the same. | |
14cf11af PM |
895 | |
896 | Say N here unless you know what you are doing. | |
897 | ||
898 | config KERNEL_START | |
899 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad KG |
900 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
901 | default "0xc2000000" if CRASH_DUMP | |
14cf11af PM |
902 | default "0xc0000000" |
903 | ||
37dd2bad KG |
904 | config PHYSICAL_START_BOOL |
905 | bool "Set physical address where the kernel is loaded" | |
906 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
907 | help | |
908 | This gives the physical address where the kernel is loaded. | |
909 | ||
910 | Say N here unless you know what you are doing. | |
911 | ||
912 | config PHYSICAL_START | |
913 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
914 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP | |
915 | default "0x00000000" | |
916 | ||
917 | config PHYSICAL_ALIGN | |
918 | hex | |
c8f3570b | 919 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
920 | help |
921 | This value puts the alignment restrictions on physical address | |
922 | where kernel is loaded and run from. Kernel is compiled for an | |
923 | address which meets above alignment restriction. | |
924 | ||
14cf11af PM |
925 | config TASK_SIZE_BOOL |
926 | bool "Set custom user task size" | |
927 | depends on ADVANCED_OPTIONS | |
928 | help | |
929 | This option allows you to set the amount of virtual address space | |
930 | allocated to user tasks. This can be useful in optimizing the | |
931 | virtual memory layout of the system. | |
932 | ||
933 | Say N here unless you know what you are doing. | |
934 | ||
935 | config TASK_SIZE | |
936 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
937 | default "0x80000000" if PPC_PREP || PPC_8xx |
938 | default "0xc0000000" | |
14cf11af | 939 | |
84532a0f BH |
940 | config CONSISTENT_SIZE_BOOL |
941 | bool "Set custom consistent memory pool size" | |
942 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
943 | help | |
944 | This option allows you to set the size of the | |
945 | consistent memory pool. This pool of virtual memory | |
946 | is used to make consistent memory allocations. | |
947 | ||
948 | config CONSISTENT_SIZE | |
949 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
950 | default "0x00200000" if NOT_COHERENT_CACHE | |
951 | ||
14cf11af PM |
952 | config PIN_TLB |
953 | bool "Pinned Kernel TLBs (860 ONLY)" | |
954 | depends on ADVANCED_OPTIONS && 8xx | |
955 | endmenu | |
956 | ||
cabb5587 | 957 | if PPC64 |
549e8152 PM |
958 | config RELOCATABLE |
959 | bool "Build a relocatable kernel" | |
960 | help | |
961 | This builds a kernel image that is capable of running anywhere | |
962 | in the RMA (real memory area) at any 16k-aligned base address. | |
963 | The kernel is linked as a position-independent executable (PIE) | |
964 | and contains dynamic relocations which are processed early | |
965 | in the bootup process. | |
966 | ||
967 | One use is for the kexec on panic case where the recovery kernel | |
968 | must live at a different physical address than the primary | |
969 | kernel. | |
970 | ||
37dd2bad KG |
971 | config PAGE_OFFSET |
972 | hex | |
973 | default "0xc000000000000000" | |
cabb5587 SR |
974 | config KERNEL_START |
975 | hex | |
eeb2d218 | 976 | default "0xc000000000000000" |
37dd2bad KG |
977 | config PHYSICAL_START |
978 | hex | |
37dd2bad | 979 | default "0x00000000" |
cabb5587 SR |
980 | endif |
981 | ||
14cf11af PM |
982 | source "net/Kconfig" |
983 | ||
984 | source "drivers/Kconfig" | |
985 | ||
986 | source "fs/Kconfig" | |
987 | ||
98658538 LY |
988 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
989 | ||
14cf11af PM |
990 | source "lib/Kconfig" |
991 | ||
14cf11af PM |
992 | source "arch/powerpc/Kconfig.debug" |
993 | ||
994 | source "security/Kconfig" | |
995 | ||
996 | config KEYS_COMPAT | |
997 | bool | |
998 | depends on COMPAT && KEYS | |
999 | default y | |
1000 | ||
1001 | source "crypto/Kconfig" | |
6f668280 DP |
1002 | |
1003 | config PPC_CLOCK | |
1004 | bool | |
1005 | default n | |
9483a578 | 1006 | select HAVE_CLK |
1088a209 SM |
1007 | |
1008 | config PPC_LIB_RHEAP | |
1009 | bool | |
1010 | ||
bbf45ba5 | 1011 | source "arch/powerpc/kvm/Kconfig" |