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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 | |
2b79d696 SR |
123 | select HAVE_FTRACE_MCOUNT_RECORD |
124 | select HAVE_DYNAMIC_FTRACE | |
606576ce | 125 | select HAVE_FUNCTION_TRACER |
60ce8f72 | 126 | select HAVE_FUNCTION_GRAPH_TRACER |
7444a72e | 127 | select ARCH_WANT_OPTIONAL_GPIOLIB |
ec7748b5 | 128 | select HAVE_IDE |
a1f242ff | 129 | select HAVE_IOREMAP_PROT |
58340a07 | 130 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
3f550096 | 131 | select HAVE_KPROBES |
17ce452f | 132 | select HAVE_ARCH_KGDB |
9edddaa2 | 133 | select HAVE_KRETPROBES |
dec2b0d0 | 134 | select HAVE_ARCH_TRACEHOOK |
d9b2b2a2 | 135 | select HAVE_LMB |
46bab4e4 | 136 | select HAVE_DMA_ATTRS |
80d3e8ab | 137 | select HAVE_DMA_API_DEBUG |
b7d7a240 | 138 | select USE_GENERIC_SMP_HELPERS if SMP |
4e491d14 | 139 | select HAVE_OPROFILE |
ee6a0932 | 140 | select HAVE_SYSCALL_WRAPPERS if PPC64 |
c2e95c6d | 141 | select GENERIC_ATOMIC64 if PPC32 |
cdd6c482 | 142 | select HAVE_PERF_EVENTS |
359e4284 | 143 | select HAVE_REGS_AND_STACK_ACCESS_API |
14cf11af PM |
144 | |
145 | config EARLY_PRINTK | |
146 | bool | |
51d3082f | 147 | default y |
14cf11af PM |
148 | |
149 | config COMPAT | |
150 | bool | |
151 | default y if PPC64 | |
01e31dba | 152 | select COMPAT_BINFMT_ELF |
14cf11af PM |
153 | |
154 | config SYSVIPC_COMPAT | |
155 | bool | |
156 | depends on COMPAT && SYSVIPC | |
157 | default y | |
158 | ||
159 | # All PPC32s use generic nvram driver through ppc_md | |
160 | config GENERIC_NVRAM | |
161 | bool | |
162 | default y if PPC32 | |
163 | ||
ae1e9130 | 164 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
165 | bool |
166 | default y | |
167 | ||
168 | config ARCH_MAY_HAVE_PC_FDC | |
169 | bool | |
bed59275 | 170 | default !PPC_PSERIES || PCI |
14cf11af | 171 | |
08264cbc KG |
172 | config PPC_OF |
173 | def_bool y | |
174 | ||
97e873e5 SR |
175 | config OF |
176 | def_bool y | |
e169cfbe | 177 | select OF_FLATTREE |
97e873e5 | 178 | |
08264cbc KG |
179 | config PPC_UDBG_16550 |
180 | bool | |
181 | default n | |
182 | ||
08264cbc KG |
183 | config GENERIC_TBSYNC |
184 | bool | |
185 | default y if PPC32 && SMP | |
186 | default n | |
187 | ||
e65e1fc2 AV |
188 | config AUDIT_ARCH |
189 | bool | |
190 | default y | |
191 | ||
73c9ceab JF |
192 | config GENERIC_BUG |
193 | bool | |
194 | default y | |
195 | depends on BUG | |
196 | ||
b3028878 | 197 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 198 | default y if PMAC_APM_EMU |
b3028878 JB |
199 | bool |
200 | ||
9fffb55f DG |
201 | config DTC |
202 | bool | |
203 | default y | |
204 | ||
f4fc4a5b KG |
205 | config DEFAULT_UIMAGE |
206 | bool | |
207 | help | |
208 | Used to allow a board to specify it wants a uImage built by default | |
209 | default n | |
210 | ||
b09c1644 SW |
211 | config REDBOOT |
212 | bool | |
213 | ||
801e4062 JB |
214 | config ARCH_HIBERNATION_POSSIBLE |
215 | bool | |
543b9fd3 JB |
216 | default y |
217 | ||
f4cb5700 JB |
218 | config ARCH_SUSPEND_POSSIBLE |
219 | def_bool y | |
4ffd6952 AV |
220 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
221 | PPC_85xx || PPC_86xx | |
f4cb5700 | 222 | |
4c75a6f4 BH |
223 | config PPC_DCR_NATIVE |
224 | bool | |
225 | default n | |
226 | ||
227 | config PPC_DCR_MMIO | |
228 | bool | |
229 | default n | |
230 | ||
231 | config PPC_DCR | |
232 | bool | |
233 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
234 | default y | |
235 | ||
4c9d2800 BH |
236 | config PPC_OF_PLATFORM_PCI |
237 | bool | |
373a6da1 | 238 | depends on PCI |
4c9d2800 BH |
239 | depends on PPC64 # not supported on 32 bits yet |
240 | default n | |
241 | ||
6a11f75b AM |
242 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
243 | def_bool y | |
244 | ||
172ae2e7 DK |
245 | config PPC_ADV_DEBUG_REGS |
246 | bool | |
247 | depends on 40x || BOOKE | |
248 | default y | |
249 | ||
250 | config PPC_ADV_DEBUG_IACS | |
251 | int | |
252 | depends on PPC_ADV_DEBUG_REGS | |
253 | default 4 if 44x | |
254 | default 2 | |
255 | ||
256 | config PPC_ADV_DEBUG_DACS | |
257 | int | |
258 | depends on PPC_ADV_DEBUG_REGS | |
259 | default 2 | |
260 | ||
261 | config PPC_ADV_DEBUG_DVCS | |
262 | int | |
263 | depends on PPC_ADV_DEBUG_REGS | |
264 | default 2 if 44x | |
265 | default 0 | |
266 | ||
267 | config PPC_ADV_DEBUG_DAC_RANGE | |
268 | bool | |
269 | depends on PPC_ADV_DEBUG_REGS && 44x | |
270 | default y | |
271 | ||
14cf11af PM |
272 | source "init/Kconfig" |
273 | ||
dc52ddc0 MH |
274 | source "kernel/Kconfig.freezer" |
275 | ||
a2d2e1ec | 276 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 277 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 278 | |
14cf11af PM |
279 | menu "Kernel options" |
280 | ||
281 | config HIGHMEM | |
282 | bool "High memory support" | |
283 | depends on PPC32 | |
284 | ||
1ad74998 | 285 | source kernel/time/Kconfig |
14cf11af PM |
286 | source kernel/Kconfig.hz |
287 | source kernel/Kconfig.preempt | |
288 | source "fs/Kconfig.binfmt" | |
289 | ||
ba72cb8c MG |
290 | config HUGETLB_PAGE_SIZE_VARIABLE |
291 | bool | |
292 | depends on HUGETLB_PAGE | |
293 | default y | |
294 | ||
14cf11af PM |
295 | config MATH_EMULATION |
296 | bool "Math emulation" | |
4d52719a | 297 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
298 | ---help--- |
299 | Some PowerPC chips designed for embedded applications do not have | |
300 | a floating-point unit and therefore do not implement the | |
301 | floating-point instructions in the PowerPC instruction set. If you | |
302 | say Y here, the kernel will include code to emulate a floating-point | |
303 | unit, which will allow programs that use floating-point | |
304 | instructions to run. | |
305 | ||
5dd57a13 SW |
306 | config 8XX_MINIMAL_FPEMU |
307 | bool "Minimal math emulation for 8xx" | |
308 | depends on 8xx && !MATH_EMULATION | |
309 | help | |
310 | Older arch/ppc kernels still emulated a few floating point | |
311 | instructions such as load and store, even when full math | |
312 | emulation is disabled. Say "Y" here if you want to preserve | |
313 | this behavior. | |
314 | ||
315 | It is recommended that you build a soft-float userspace instead. | |
316 | ||
fb3475e9 FT |
317 | config IOMMU_HELPER |
318 | def_bool PPC64 | |
319 | ||
ec3cf2ec BB |
320 | config SWIOTLB |
321 | bool "SWIOTLB support" | |
322 | default n | |
323 | select IOMMU_HELPER | |
324 | ---help--- | |
325 | Support for IO bounce buffering for systems without an IOMMU. | |
326 | This allows us to DMA to the full physical address space on | |
327 | platforms where the size of a physical address is larger | |
328 | than the bus address. Not all platforms support this. | |
329 | ||
14cf11af PM |
330 | config HOTPLUG_CPU |
331 | bool "Support for enabling/disabling CPUs" | |
332 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) | |
333 | ---help--- | |
334 | Say Y here to be able to disable and re-enable individual | |
335 | CPUs at runtime on SMP machines. | |
336 | ||
337 | Say N if you are unsure. | |
338 | ||
12633e80 NF |
339 | config ARCH_CPU_PROBE_RELEASE |
340 | def_bool y | |
341 | depends on HOTPLUG_CPU | |
342 | ||
cc57637b YG |
343 | config ARCH_ENABLE_MEMORY_HOTPLUG |
344 | def_bool y | |
345 | ||
a99824f3 BP |
346 | config ARCH_HAS_WALK_MEMORY |
347 | def_bool y | |
348 | ||
1482471d BP |
349 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
350 | def_bool y | |
351 | ||
14cf11af PM |
352 | config KEXEC |
353 | bool "kexec system call (EXPERIMENTAL)" | |
b3df895a | 354 | depends on (PPC_BOOK3S || (FSL_BOOKE && !SMP)) && EXPERIMENTAL |
14cf11af PM |
355 | help |
356 | kexec is a system call that implements the ability to shutdown your | |
357 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 358 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
359 | you can start any kernel with it, not just Linux. |
360 | ||
1f1332f7 | 361 | The name comes from the similarity to the exec system call. |
14cf11af PM |
362 | |
363 | It is an ongoing process to be certain the hardware in a machine | |
364 | is properly shutdown, so do not be surprised if this code does not | |
365 | initially work for you. It may help to enable device hotplugging | |
366 | support. As of this writing the exact hardware interface is | |
367 | strongly in flux, so no good recommendation can be made. | |
368 | ||
e8625d46 | 369 | config CRASH_DUMP |
3420b5da | 370 | bool "Build a kdump crash kernel" |
c6ac71a1 MK |
371 | depends on PPC64 || 6xx |
372 | select RELOCATABLE if PPC64 | |
e8625d46 HM |
373 | help |
374 | Build a kernel suitable for use as a kdump capture kernel. | |
54622f10 MK |
375 | The same kernel binary can be used as production kernel and dump |
376 | capture kernel. | |
e8625d46 | 377 | |
242f271c MA |
378 | config PHYP_DUMP |
379 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" | |
380 | depends on PPC_PSERIES && EXPERIMENTAL | |
381 | help | |
382 | Hypervisor-assisted dump is meant to be a kdump replacement | |
383 | offering robustness and speed not possible without system | |
692105b8 | 384 | hypervisor assistance. |
242f271c MA |
385 | |
386 | If unsure, say "N" | |
387 | ||
14cf11af PM |
388 | config PPCBUG_NVRAM |
389 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
390 | default y if PPC_PREP | |
391 | ||
392 | config IRQ_ALL_CPUS | |
393 | bool "Distribute interrupts on all CPUs by default" | |
394 | depends on SMP && !MV64360 | |
395 | help | |
396 | This option gives the kernel permission to distribute IRQs across | |
397 | multiple CPUs. Saying N here will route all IRQs to the first | |
398 | CPU. Generally saying Y is safe, although some problems have been | |
399 | reported with SMP Power Macintoshes with this option enabled. | |
400 | ||
cd015707 ME |
401 | config SPARSE_IRQ |
402 | bool "Support sparse irq numbering" | |
403 | default y | |
404 | help | |
405 | This enables support for sparse irqs. This is useful for distro | |
406 | kernels that want to define a high CONFIG_NR_CPUS value but still | |
407 | want to have low kernel memory footprint on smaller machines. | |
408 | ||
409 | ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread | |
410 | out the irq_desc[] array in a more NUMA-friendly way. ) | |
411 | ||
412 | If you don't know what to do here, say Y. | |
413 | ||
ffa27b6b AW |
414 | config NUMA |
415 | bool "NUMA support" | |
416 | depends on PPC64 | |
417 | default y if SMP && PPC_PSERIES | |
418 | ||
c80d79d7 YG |
419 | config NODES_SHIFT |
420 | int | |
ea55bf29 | 421 | default "8" if PPC64 |
c80d79d7 YG |
422 | default "4" |
423 | depends on NEED_MULTIPLE_NODES | |
424 | ||
ea55bf29 AB |
425 | config MAX_ACTIVE_REGIONS |
426 | int | |
427 | default "256" if PPC64 | |
428 | default "32" | |
429 | ||
14cf11af PM |
430 | config ARCH_SELECT_MEMORY_MODEL |
431 | def_bool y | |
432 | depends on PPC64 | |
433 | ||
434 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
435 | def_bool y |
436 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 437 | |
45fb6cea | 438 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 439 | def_bool y |
9100b205 | 440 | depends on PPC64 |
d29eff7b | 441 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 442 | |
45fb6cea | 443 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 444 | def_bool y |
78bde53e | 445 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 446 | |
c67c3cb4 | 447 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 448 | def_bool y |
c67c3cb4 | 449 | |
5a1eb5c4 BH |
450 | config SYS_SUPPORTS_HUGETLBFS |
451 | def_bool y | |
452 | depends on PPC_BOOK3S_64 | |
453 | ||
c67c3cb4 | 454 | source "mm/Kconfig" |
14cf11af | 455 | |
7e9191da MK |
456 | config ARCH_MEMORY_PROBE |
457 | def_bool y | |
458 | depends on MEMORY_HOTPLUG | |
459 | ||
75167957 AW |
460 | # Some NUMA nodes have memory ranges that span |
461 | # other nodes. Even though a pfn is valid and | |
462 | # between a node's start and end pfns, it may not | |
463 | # reside on that node. See memmap_init_zone() | |
464 | # for details. | |
465 | config NODES_SPAN_OTHER_NODES | |
466 | def_bool y | |
467 | depends on NEED_MULTIPLE_NODES | |
468 | ||
16c2d476 BH |
469 | config PPC_HAS_HASH_64K |
470 | bool | |
471 | depends on PPC64 | |
472 | default n | |
473 | ||
e1240122 YT |
474 | config STDBINUTILS |
475 | bool "Using standard binutils settings" | |
476 | depends on 44x | |
477 | default y | |
478 | help | |
479 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
480 | Note, that kernel will be able to run only those applications, | |
481 | which had been compiled using binutils later than 2.17.50.0.3 with | |
482 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
483 | the older binutils, you can patch them with a trivial patch, which | |
484 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
485 | ||
ca9153a3 IY |
486 | choice |
487 | prompt "Page size" | |
488 | default PPC_4K_PAGES | |
3c726f8d | 489 | help |
ca9153a3 IY |
490 | Select the kernel logical page size. Increasing the page size |
491 | will reduce software overhead at each page boundary, allow | |
492 | hardware prefetch mechanisms to be more effective, and allow | |
493 | larger dma transfers increasing IO efficiency and reducing | |
494 | overhead. However the utilization of memory will increase. | |
495 | For example, each cached file will using a multiple of the | |
496 | page size to hold its contents and the difference between the | |
497 | end of file and the end of page is wasted. | |
498 | ||
499 | Some dedicated systems, such as software raid serving with | |
500 | accelerated calculations, have shown significant increases. | |
501 | ||
502 | If you configure a 64 bit kernel for 64k pages but the | |
503 | processor does not support them, then the kernel will simulate | |
504 | them with 4k pages, loading them on demand, but with the | |
505 | reduced software overhead and larger internal fragmentation. | |
506 | For the 32 bit kernel, a large page option will not be offered | |
507 | unless it is supported by the configured processor. | |
508 | ||
509 | If unsure, choose 4K_PAGES. | |
510 | ||
511 | config PPC_4K_PAGES | |
512 | bool "4k page size" | |
513 | ||
514 | config PPC_16K_PAGES | |
515 | bool "16k page size" if 44x | |
516 | ||
517 | config PPC_64K_PAGES | |
2d27cfd3 | 518 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
ca9153a3 IY |
519 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
520 | ||
e1240122 YT |
521 | config PPC_256K_PAGES |
522 | bool "256k page size" if 44x | |
adf213c4 | 523 | depends on !STDBINUTILS |
e1240122 YT |
524 | help |
525 | Make the page size 256k. | |
526 | ||
527 | As the ELF standard only requires alignment to support page | |
528 | sizes up to 64k, you will need to compile all of your user | |
529 | space applications with a non-standard binutils settings | |
530 | (see the STDBINUTILS description for details). | |
531 | ||
532 | Say N unless you know what you are doing. | |
533 | ||
ca9153a3 | 534 | endchoice |
3c726f8d | 535 | |
53bcddb9 SR |
536 | config FORCE_MAX_ZONEORDER |
537 | int "Maximum zone order" | |
066c4b87 BH |
538 | range 9 64 if PPC64 && PPC_64K_PAGES |
539 | default "9" if PPC64 && PPC_64K_PAGES | |
540 | range 13 64 if PPC64 && !PPC_64K_PAGES | |
541 | default "13" if PPC64 && !PPC_64K_PAGES | |
542 | range 9 64 if PPC32 && PPC_16K_PAGES | |
543 | default "9" if PPC32 && PPC_16K_PAGES | |
544 | range 7 64 if PPC32 && PPC_64K_PAGES | |
545 | default "7" if PPC32 && PPC_64K_PAGES | |
546 | range 5 64 if PPC32 && PPC_256K_PAGES | |
547 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 548 | range 11 64 |
53bcddb9 SR |
549 | default "11" |
550 | help | |
551 | The kernel memory allocator divides physically contiguous memory | |
552 | blocks into "zones", where each zone is a power of two number of | |
553 | pages. This option selects the largest power of two that the kernel | |
554 | keeps in the memory allocator. If you need to allocate very large | |
555 | blocks of physically contiguous memory, then you may need to | |
556 | increase this value. | |
557 | ||
558 | This config option is actually maximum order plus one. For example, | |
559 | a value of 11 means that the largest free memory block is 2^10 pages. | |
560 | ||
561 | The page size is not necessarily 4KB. For example, on 64-bit | |
562 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
563 | this in mind when choosing a value for this option. | |
564 | ||
fa28237c PM |
565 | config PPC_SUBPAGE_PROT |
566 | bool "Support setting protections for 4k subpages" | |
ca9153a3 | 567 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
fa28237c PM |
568 | help |
569 | This option adds support for a system call to allow user programs | |
570 | to set access permissions (read/write, readonly, or no access) | |
571 | on the 4k subpages of each 64k page. | |
572 | ||
14cf11af PM |
573 | config SCHED_SMT |
574 | bool "SMT (Hyperthreading) scheduler support" | |
575 | depends on PPC64 && SMP | |
14cf11af PM |
576 | help |
577 | SMT scheduler support improves the CPU scheduler's decision making | |
578 | when dealing with POWER5 cpus at a cost of slightly increased | |
579 | overhead in some places. If unsure say N here. | |
580 | ||
581 | config PROC_DEVICETREE | |
5f296755 PM |
582 | bool "Support for device tree in /proc" |
583 | depends on PROC_FS | |
14cf11af PM |
584 | help |
585 | This option adds a device-tree directory under /proc which contains | |
586 | an image of the device tree that the kernel copies from Open | |
5f296755 | 587 | Firmware or other boot firmware. If unsure, say Y here. |
14cf11af | 588 | |
14cf11af PM |
589 | config CMDLINE_BOOL |
590 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
591 | |
592 | config CMDLINE | |
593 | string "Initial kernel command string" | |
594 | depends on CMDLINE_BOOL | |
595 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
596 | help | |
597 | On some platforms, there is currently no way for the boot loader to | |
598 | pass arguments to the kernel. For these platforms, you can supply | |
599 | some command-line options at build time by entering them here. In | |
600 | most cases you will need to specify the root device here. | |
601 | ||
c356aa45 GL |
602 | config EXTRA_TARGETS |
603 | string "Additional default image types" | |
604 | help | |
605 | List additional targets to be built by the bootwrapper here (separated | |
606 | by spaces). This is useful for targets that depend of device tree | |
607 | files in the .dts directory. | |
608 | ||
609 | Targets in this list will be build as part of the default build | |
610 | target, or when the user does a 'make zImage' or a | |
611 | 'make zImage.initrd'. | |
612 | ||
613 | If unsure, leave blank | |
614 | ||
14cf11af | 615 | if !44x || BROKEN |
b28f5081 JB |
616 | config ARCH_WANTS_FREEZER_CONTROL |
617 | def_bool y | |
618 | depends on ADB_PMU | |
619 | ||
14cf11af PM |
620 | source kernel/power/Kconfig |
621 | endif | |
622 | ||
623 | config SECCOMP | |
624 | bool "Enable seccomp to safely compute untrusted bytecode" | |
625 | depends on PROC_FS | |
626 | default y | |
627 | help | |
628 | This kernel feature is useful for number crunching applications | |
629 | that may need to compute untrusted bytecode during their | |
630 | execution. By using pipes or other transports made available to | |
631 | the process as file descriptors supporting the read/write | |
632 | syscalls, it's possible to isolate those applications in | |
633 | their own address space using seccomp. Once seccomp is | |
634 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
635 | and the task is only allowed to execute a few safe syscalls | |
636 | defined by each seccomp mode. | |
637 | ||
638 | If unsure, say Y. Only embedded should say N here. | |
639 | ||
640 | endmenu | |
641 | ||
642 | config ISA_DMA_API | |
643 | bool | |
373a6da1 | 644 | default !PPC_ISERIES || PCI |
14cf11af PM |
645 | |
646 | menu "Bus options" | |
647 | ||
648 | config ISA | |
649 | bool "Support for ISA-bus hardware" | |
650 | depends on PPC_PREP || PPC_CHRP | |
f9bd170a | 651 | select PPC_I8259 |
14cf11af PM |
652 | help |
653 | Find out whether you have ISA slots on your motherboard. ISA is the | |
654 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
655 | inside your box. If you have an Apple machine, say N here; if you | |
656 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If | |
657 | you have an embedded board, consult your board documentation. | |
658 | ||
5ac6da66 CL |
659 | config ZONE_DMA |
660 | bool | |
661 | default y | |
662 | ||
af407c6d FT |
663 | config NEED_DMA_MAP_STATE |
664 | def_bool (PPC64 || NOT_COHERENT_CACHE) | |
665 | ||
e32205eb FT |
666 | config NEED_SG_DMA_LENGTH |
667 | def_bool y | |
668 | ||
14cf11af PM |
669 | config GENERIC_ISA_DMA |
670 | bool | |
671 | depends on PPC64 || POWER4 || 6xx && !CPM2 | |
672 | default y | |
673 | ||
25635c71 PM |
674 | config PPC_INDIRECT_PCI |
675 | bool | |
676 | depends on PCI | |
63dafe57 | 677 | default y if 40x || 44x |
25635c71 PM |
678 | default n |
679 | ||
14cf11af PM |
680 | config EISA |
681 | bool | |
682 | ||
683 | config SBUS | |
684 | bool | |
685 | ||
08264cbc KG |
686 | config FSL_SOC |
687 | bool | |
688 | ||
55c44991 RZ |
689 | config FSL_PCI |
690 | bool | |
691 | select PPC_INDIRECT_PCI | |
d0839118 | 692 | select PCI_QUIRKS |
55c44991 | 693 | |
4ffd6952 AV |
694 | config FSL_PMC |
695 | bool | |
696 | default y | |
697 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
698 | help | |
699 | Freescale MPC85xx/MPC86xx power management controller support | |
700 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
701 | ||
2a706919 SR |
702 | config 4xx_SOC |
703 | bool | |
704 | ||
acaa7aa3 AV |
705 | config FSL_LBC |
706 | bool | |
707 | help | |
708 | Freescale Localbus support | |
709 | ||
83ff9dcf AV |
710 | config FSL_GTM |
711 | bool | |
712 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
713 | help | |
714 | Freescale General-purpose Timers support | |
715 | ||
14cf11af PM |
716 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
717 | config MCA | |
718 | bool | |
719 | ||
b500563b JR |
720 | # Platforms that what PCI turned unconditionally just do select PCI |
721 | # in their config node. Platforms that want to choose at config | |
722 | # time should select PPC_PCI_CHOICE | |
723 | config PPC_PCI_CHOICE | |
724 | bool | |
725 | ||
14cf11af | 726 | config PCI |
b500563b JR |
727 | bool "PCI support" if PPC_PCI_CHOICE |
728 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
bcc48591 | 729 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
f21f49ea | 730 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 731 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 732 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
733 | help |
734 | Find out whether your system includes a PCI bus. PCI is the name of | |
735 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
736 | your box. If you say Y here, the kernel will include drivers and | |
737 | infrastructure code to support PCI bus devices. | |
738 | ||
739 | config PCI_DOMAINS | |
36e23590 MW |
740 | def_bool PCI |
741 | ||
742 | config PCI_SYSCALL | |
743 | def_bool PCI | |
14cf11af | 744 | |
14cf11af PM |
745 | config PCI_QSPAN |
746 | bool "QSpan PCI" | |
747 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 748 | select PPC_I8259 |
14cf11af PM |
749 | help |
750 | Say Y here if you have a system based on a Motorola 8xx-series | |
751 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
752 | ||
753 | config PCI_8260 | |
754 | bool | |
755 | depends on PCI && 8260 | |
25635c71 | 756 | select PPC_INDIRECT_PCI |
14cf11af PM |
757 | default y |
758 | ||
759 | config 8260_PCI9 | |
4a3ecc62 | 760 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 761 | depends on PCI_8260 && !8272 |
14cf11af PM |
762 | default y |
763 | ||
764 | choice | |
4a3ecc62 | 765 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
766 | depends on 8260_PCI9 |
767 | ||
768 | config 8260_PCI9_IDMA1 | |
769 | bool "IDMA1" | |
770 | ||
771 | config 8260_PCI9_IDMA2 | |
772 | bool "IDMA2" | |
773 | ||
774 | config 8260_PCI9_IDMA3 | |
775 | bool "IDMA3" | |
776 | ||
777 | config 8260_PCI9_IDMA4 | |
778 | bool "IDMA4" | |
779 | ||
780 | endchoice | |
781 | ||
bb53bb3d JM |
782 | source "drivers/pci/pcie/Kconfig" |
783 | ||
14cf11af PM |
784 | source "drivers/pci/Kconfig" |
785 | ||
786 | source "drivers/pcmcia/Kconfig" | |
787 | ||
788 | source "drivers/pci/hotplug/Kconfig" | |
789 | ||
f1f389d5 ZW |
790 | config HAS_RAPIDIO |
791 | bool | |
792 | default n | |
793 | ||
794 | config RAPIDIO | |
795 | bool "RapidIO support" | |
796 | depends on HAS_RAPIDIO | |
797 | help | |
798 | If you say Y here, the kernel will include drivers and | |
799 | infrastructure code to support RapidIO interconnect devices. | |
800 | ||
801 | source "drivers/rapidio/Kconfig" | |
802 | ||
14cf11af PM |
803 | endmenu |
804 | ||
805 | menu "Advanced setup" | |
806 | depends on PPC32 | |
807 | ||
808 | config ADVANCED_OPTIONS | |
809 | bool "Prompt for advanced kernel configuration options" | |
810 | help | |
811 | This option will enable prompting for a variety of advanced kernel | |
812 | configuration options. These options can cause the kernel to not | |
813 | work if they are set incorrectly, but can be used to optimize certain | |
814 | aspects of kernel memory management. | |
815 | ||
816 | Unless you know what you are doing, say N here. | |
817 | ||
818 | comment "Default settings for advanced configuration options are used" | |
819 | depends on !ADVANCED_OPTIONS | |
820 | ||
14cf11af PM |
821 | config LOWMEM_SIZE_BOOL |
822 | bool "Set maximum low memory" | |
823 | depends on ADVANCED_OPTIONS | |
824 | help | |
825 | This option allows you to set the maximum amount of memory which | |
826 | will be used as "low memory", that is, memory which the kernel can | |
827 | access directly, without having to set up a kernel virtual mapping. | |
828 | This can be useful in optimizing the layout of kernel virtual | |
829 | memory. | |
830 | ||
831 | Say N here unless you know what you are doing. | |
832 | ||
833 | config LOWMEM_SIZE | |
834 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
835 | default "0x30000000" | |
836 | ||
96051465 TP |
837 | config LOWMEM_CAM_NUM_BOOL |
838 | bool "Set number of CAMs to use to map low memory" | |
839 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
840 | help | |
841 | This option allows you to set the maximum number of CAM slots that | |
842 | will be used to map low memory. There are a limited number of slots | |
843 | available and even more limited number that will fit in the L1 MMU. | |
844 | However, using more entries will allow mapping more low memory. This | |
845 | can be useful in optimizing the layout of kernel virtual memory. | |
846 | ||
847 | Say N here unless you know what you are doing. | |
848 | ||
849 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 850 | depends on FSL_BOOKE |
96051465 TP |
851 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
852 | default 3 | |
853 | ||
37dd2bad KG |
854 | config RELOCATABLE |
855 | bool "Build a relocatable kernel (EXPERIMENTAL)" | |
856 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
857 | help | |
858 | This builds a kernel image that is capable of running at the | |
859 | location the kernel is loaded at (some alignment restrictions may | |
860 | exist). | |
861 | ||
862 | One use is for the kexec on panic case where the recovery kernel | |
863 | must live at a different physical address than the primary | |
864 | kernel. | |
865 | ||
866 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
867 | it has been loaded at and the compile time physical addresses | |
868 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
869 | setting can still be useful to bootwrappers that need to know the | |
870 | load location of the kernel (eg. u-boot/mkimage). | |
871 | ||
872 | config PAGE_OFFSET_BOOL | |
873 | bool "Set custom page offset address" | |
874 | depends on ADVANCED_OPTIONS | |
875 | help | |
876 | This option allows you to set the kernel virtual address at which | |
877 | the kernel will map low memory. This can be useful in optimizing | |
878 | the virtual memory layout of the system. | |
879 | ||
880 | Say N here unless you know what you are doing. | |
881 | ||
882 | config PAGE_OFFSET | |
883 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
884 | default "0xc0000000" | |
885 | ||
14cf11af PM |
886 | config KERNEL_START_BOOL |
887 | bool "Set custom kernel base address" | |
888 | depends on ADVANCED_OPTIONS | |
889 | help | |
890 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
891 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
892 | however there are times (like kdump) that one might not want them | |
893 | to be the same. | |
14cf11af PM |
894 | |
895 | Say N here unless you know what you are doing. | |
896 | ||
897 | config KERNEL_START | |
898 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad KG |
899 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
900 | default "0xc2000000" if CRASH_DUMP | |
14cf11af PM |
901 | default "0xc0000000" |
902 | ||
37dd2bad KG |
903 | config PHYSICAL_START_BOOL |
904 | bool "Set physical address where the kernel is loaded" | |
905 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
906 | help | |
907 | This gives the physical address where the kernel is loaded. | |
908 | ||
909 | Say N here unless you know what you are doing. | |
910 | ||
911 | config PHYSICAL_START | |
912 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
913 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP | |
914 | default "0x00000000" | |
915 | ||
916 | config PHYSICAL_ALIGN | |
917 | hex | |
c8f3570b | 918 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
919 | help |
920 | This value puts the alignment restrictions on physical address | |
921 | where kernel is loaded and run from. Kernel is compiled for an | |
922 | address which meets above alignment restriction. | |
923 | ||
14cf11af PM |
924 | config TASK_SIZE_BOOL |
925 | bool "Set custom user task size" | |
926 | depends on ADVANCED_OPTIONS | |
927 | help | |
928 | This option allows you to set the amount of virtual address space | |
929 | allocated to user tasks. This can be useful in optimizing the | |
930 | virtual memory layout of the system. | |
931 | ||
932 | Say N here unless you know what you are doing. | |
933 | ||
934 | config TASK_SIZE | |
935 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
936 | default "0x80000000" if PPC_PREP || PPC_8xx |
937 | default "0xc0000000" | |
14cf11af | 938 | |
84532a0f BH |
939 | config CONSISTENT_SIZE_BOOL |
940 | bool "Set custom consistent memory pool size" | |
941 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
942 | help | |
943 | This option allows you to set the size of the | |
944 | consistent memory pool. This pool of virtual memory | |
945 | is used to make consistent memory allocations. | |
946 | ||
947 | config CONSISTENT_SIZE | |
948 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
949 | default "0x00200000" if NOT_COHERENT_CACHE | |
950 | ||
14cf11af PM |
951 | config PIN_TLB |
952 | bool "Pinned Kernel TLBs (860 ONLY)" | |
953 | depends on ADVANCED_OPTIONS && 8xx | |
954 | endmenu | |
955 | ||
cabb5587 | 956 | if PPC64 |
549e8152 PM |
957 | config RELOCATABLE |
958 | bool "Build a relocatable kernel" | |
959 | help | |
960 | This builds a kernel image that is capable of running anywhere | |
961 | in the RMA (real memory area) at any 16k-aligned base address. | |
962 | The kernel is linked as a position-independent executable (PIE) | |
963 | and contains dynamic relocations which are processed early | |
964 | in the bootup process. | |
965 | ||
966 | One use is for the kexec on panic case where the recovery kernel | |
967 | must live at a different physical address than the primary | |
968 | kernel. | |
969 | ||
37dd2bad KG |
970 | config PAGE_OFFSET |
971 | hex | |
972 | default "0xc000000000000000" | |
cabb5587 SR |
973 | config KERNEL_START |
974 | hex | |
eeb2d218 | 975 | default "0xc000000000000000" |
37dd2bad KG |
976 | config PHYSICAL_START |
977 | hex | |
37dd2bad | 978 | default "0x00000000" |
cabb5587 SR |
979 | endif |
980 | ||
14cf11af PM |
981 | source "net/Kconfig" |
982 | ||
983 | source "drivers/Kconfig" | |
984 | ||
985 | source "fs/Kconfig" | |
986 | ||
98658538 LY |
987 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
988 | ||
14cf11af PM |
989 | source "lib/Kconfig" |
990 | ||
14cf11af PM |
991 | source "arch/powerpc/Kconfig.debug" |
992 | ||
993 | source "security/Kconfig" | |
994 | ||
995 | config KEYS_COMPAT | |
996 | bool | |
997 | depends on COMPAT && KEYS | |
998 | default y | |
999 | ||
1000 | source "crypto/Kconfig" | |
6f668280 DP |
1001 | |
1002 | config PPC_CLOCK | |
1003 | bool | |
1004 | default n | |
9483a578 | 1005 | select HAVE_CLK |
1088a209 SM |
1006 | |
1007 | config PPC_LIB_RHEAP | |
1008 | bool | |
1009 | ||
bbf45ba5 | 1010 | source "arch/powerpc/kvm/Kconfig" |