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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 | ||
988c388a | 49 | config HAVE_SETUP_PER_CPU_AREA |
b32ef636 | 50 | def_bool PPC64 |
51 | ||
0d7012a9 IM |
52 | config IRQ_PER_CPU |
53 | bool | |
54 | default y | |
55 | ||
fd3e0bbc CH |
56 | config STACKTRACE_SUPPORT |
57 | bool | |
58 | default y | |
59 | ||
01f4b8b8 AB |
60 | config HAVE_LATENCYTOP_SUPPORT |
61 | def_bool y | |
62 | ||
945feb17 BH |
63 | config TRACE_IRQFLAGS_SUPPORT |
64 | bool | |
65 | depends on PPC64 | |
66 | default y | |
67 | ||
68 | config LOCKDEP_SUPPORT | |
69 | bool | |
70 | default y | |
71 | ||
14cf11af PM |
72 | config RWSEM_GENERIC_SPINLOCK |
73 | bool | |
74 | ||
75 | config RWSEM_XCHGADD_ALGORITHM | |
76 | bool | |
77 | default y | |
78 | ||
95c354fe NP |
79 | config GENERIC_LOCKBREAK |
80 | bool | |
81 | default y | |
82 | depends on SMP && PREEMPT | |
83 | ||
f0d1b0b3 DH |
84 | config ARCH_HAS_ILOG2_U32 |
85 | bool | |
ef55d53c | 86 | default y |
f0d1b0b3 DH |
87 | |
88 | config ARCH_HAS_ILOG2_U64 | |
89 | bool | |
ef55d53c | 90 | default y if 64BIT |
f0d1b0b3 | 91 | |
e779b2f9 AM |
92 | config GENERIC_HWEIGHT |
93 | bool | |
94 | default y | |
95 | ||
0a9cb46a JM |
96 | config GENERIC_FIND_NEXT_BIT |
97 | bool | |
98 | default y | |
99 | ||
b7ce3415 AV |
100 | config GENERIC_GPIO |
101 | bool | |
102 | help | |
103 | Generic GPIO API support | |
104 | ||
f057eac0 SR |
105 | config ARCH_NO_VIRT_TO_BUS |
106 | def_bool PPC64 | |
107 | ||
14cf11af PM |
108 | config PPC |
109 | bool | |
110 | default y | |
2b79d696 SR |
111 | select HAVE_FTRACE_MCOUNT_RECORD |
112 | select HAVE_DYNAMIC_FTRACE | |
606576ce | 113 | select HAVE_FUNCTION_TRACER |
60ce8f72 | 114 | select HAVE_FUNCTION_GRAPH_TRACER |
7444a72e | 115 | select ARCH_WANT_OPTIONAL_GPIOLIB |
ec7748b5 | 116 | select HAVE_IDE |
a1f242ff | 117 | select HAVE_IOREMAP_PROT |
58340a07 | 118 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
3f550096 | 119 | select HAVE_KPROBES |
17ce452f | 120 | select HAVE_ARCH_KGDB |
9edddaa2 | 121 | select HAVE_KRETPROBES |
dec2b0d0 | 122 | select HAVE_ARCH_TRACEHOOK |
d9b2b2a2 | 123 | select HAVE_LMB |
7ff86b03 | 124 | select HAVE_DMA_ATTRS if PPC64 |
b7d7a240 | 125 | select USE_GENERIC_SMP_HELPERS if SMP |
4e491d14 | 126 | select HAVE_OPROFILE |
ee6a0932 | 127 | select HAVE_SYSCALL_WRAPPERS if PPC64 |
c2e95c6d | 128 | select GENERIC_ATOMIC64 if PPC32 |
105988c0 | 129 | select HAVE_PERF_COUNTERS |
14cf11af PM |
130 | |
131 | config EARLY_PRINTK | |
132 | bool | |
51d3082f | 133 | default y |
14cf11af PM |
134 | |
135 | config COMPAT | |
136 | bool | |
137 | default y if PPC64 | |
01e31dba | 138 | select COMPAT_BINFMT_ELF |
14cf11af PM |
139 | |
140 | config SYSVIPC_COMPAT | |
141 | bool | |
142 | depends on COMPAT && SYSVIPC | |
143 | default y | |
144 | ||
145 | # All PPC32s use generic nvram driver through ppc_md | |
146 | config GENERIC_NVRAM | |
147 | bool | |
148 | default y if PPC32 | |
149 | ||
ae1e9130 | 150 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
151 | bool |
152 | default y | |
153 | ||
154 | config ARCH_MAY_HAVE_PC_FDC | |
155 | bool | |
bed59275 | 156 | default !PPC_PSERIES || PCI |
14cf11af | 157 | |
08264cbc KG |
158 | config PPC_OF |
159 | def_bool y | |
160 | ||
97e873e5 SR |
161 | config OF |
162 | def_bool y | |
163 | ||
08264cbc KG |
164 | config PPC_UDBG_16550 |
165 | bool | |
166 | default n | |
167 | ||
08264cbc KG |
168 | config GENERIC_TBSYNC |
169 | bool | |
170 | default y if PPC32 && SMP | |
171 | default n | |
172 | ||
e65e1fc2 AV |
173 | config AUDIT_ARCH |
174 | bool | |
175 | default y | |
176 | ||
73c9ceab JF |
177 | config GENERIC_BUG |
178 | bool | |
179 | default y | |
180 | depends on BUG | |
181 | ||
b3028878 | 182 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 183 | default y if PMAC_APM_EMU |
b3028878 JB |
184 | bool |
185 | ||
9fffb55f DG |
186 | config DTC |
187 | bool | |
188 | default y | |
189 | ||
f4fc4a5b KG |
190 | config DEFAULT_UIMAGE |
191 | bool | |
192 | help | |
193 | Used to allow a board to specify it wants a uImage built by default | |
194 | default n | |
195 | ||
b09c1644 SW |
196 | config REDBOOT |
197 | bool | |
198 | ||
801e4062 | 199 | config HIBERNATE_32 |
543b9fd3 | 200 | bool |
801e4062 JB |
201 | depends on (PPC_PMAC && !SMP) || BROKEN |
202 | default y | |
203 | ||
204 | config HIBERNATE_64 | |
205 | bool | |
206 | depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL) | |
207 | default y | |
208 | ||
209 | config ARCH_HIBERNATION_POSSIBLE | |
210 | bool | |
211 | depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32) | |
543b9fd3 JB |
212 | default y |
213 | ||
f4cb5700 JB |
214 | config ARCH_SUSPEND_POSSIBLE |
215 | def_bool y | |
d49747bd | 216 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx |
f4cb5700 | 217 | |
4c75a6f4 BH |
218 | config PPC_DCR_NATIVE |
219 | bool | |
220 | default n | |
221 | ||
222 | config PPC_DCR_MMIO | |
223 | bool | |
224 | default n | |
225 | ||
226 | config PPC_DCR | |
227 | bool | |
228 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
229 | default y | |
230 | ||
4c9d2800 BH |
231 | config PPC_OF_PLATFORM_PCI |
232 | bool | |
373a6da1 | 233 | depends on PCI |
4c9d2800 BH |
234 | depends on PPC64 # not supported on 32 bits yet |
235 | default n | |
236 | ||
6a11f75b AM |
237 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
238 | def_bool y | |
239 | ||
14cf11af PM |
240 | source "init/Kconfig" |
241 | ||
dc52ddc0 MH |
242 | source "kernel/Kconfig.freezer" |
243 | ||
a2d2e1ec | 244 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 245 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 246 | |
14cf11af PM |
247 | menu "Kernel options" |
248 | ||
249 | config HIGHMEM | |
250 | bool "High memory support" | |
251 | depends on PPC32 | |
252 | ||
1ad74998 | 253 | source kernel/time/Kconfig |
14cf11af PM |
254 | source kernel/Kconfig.hz |
255 | source kernel/Kconfig.preempt | |
256 | source "fs/Kconfig.binfmt" | |
257 | ||
ba72cb8c MG |
258 | config HUGETLB_PAGE_SIZE_VARIABLE |
259 | bool | |
260 | depends on HUGETLB_PAGE | |
261 | default y | |
262 | ||
14cf11af PM |
263 | config MATH_EMULATION |
264 | bool "Math emulation" | |
4d52719a | 265 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
266 | ---help--- |
267 | Some PowerPC chips designed for embedded applications do not have | |
268 | a floating-point unit and therefore do not implement the | |
269 | floating-point instructions in the PowerPC instruction set. If you | |
270 | say Y here, the kernel will include code to emulate a floating-point | |
271 | unit, which will allow programs that use floating-point | |
272 | instructions to run. | |
273 | ||
5dd57a13 SW |
274 | config 8XX_MINIMAL_FPEMU |
275 | bool "Minimal math emulation for 8xx" | |
276 | depends on 8xx && !MATH_EMULATION | |
277 | help | |
278 | Older arch/ppc kernels still emulated a few floating point | |
279 | instructions such as load and store, even when full math | |
280 | emulation is disabled. Say "Y" here if you want to preserve | |
281 | this behavior. | |
282 | ||
283 | It is recommended that you build a soft-float userspace instead. | |
284 | ||
14cf11af | 285 | config IOMMU_VMERGE |
768cc2d3 LV |
286 | bool "Enable IOMMU virtual merging" |
287 | depends on PPC64 | |
288 | default y | |
14cf11af PM |
289 | help |
290 | Cause IO segments sent to a device for DMA to be merged virtually | |
291 | by the IOMMU when they happen to have been allocated contiguously. | |
292 | This doesn't add pressure to the IOMMU allocator. However, some | |
293 | drivers don't support getting large merged segments coming back | |
768cc2d3 LV |
294 | from *_map_sg(). |
295 | ||
296 | Most drivers don't have this problem; it is safe to say Y here. | |
14cf11af | 297 | |
fb3475e9 FT |
298 | config IOMMU_HELPER |
299 | def_bool PPC64 | |
300 | ||
ec3cf2ec BB |
301 | config SWIOTLB |
302 | bool "SWIOTLB support" | |
303 | default n | |
304 | select IOMMU_HELPER | |
305 | ---help--- | |
306 | Support for IO bounce buffering for systems without an IOMMU. | |
307 | This allows us to DMA to the full physical address space on | |
308 | platforms where the size of a physical address is larger | |
309 | than the bus address. Not all platforms support this. | |
310 | ||
15e09c0e BB |
311 | config PPC_NEED_DMA_SYNC_OPS |
312 | def_bool y | |
ec3cf2ec | 313 | depends on (NOT_COHERENT_CACHE || SWIOTLB) |
15e09c0e | 314 | |
14cf11af PM |
315 | config HOTPLUG_CPU |
316 | bool "Support for enabling/disabling CPUs" | |
317 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) | |
318 | ---help--- | |
319 | Say Y here to be able to disable and re-enable individual | |
320 | CPUs at runtime on SMP machines. | |
321 | ||
322 | Say N if you are unsure. | |
323 | ||
cc57637b YG |
324 | config ARCH_ENABLE_MEMORY_HOTPLUG |
325 | def_bool y | |
326 | ||
a99824f3 BP |
327 | config ARCH_HAS_WALK_MEMORY |
328 | def_bool y | |
329 | ||
1482471d BP |
330 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
331 | def_bool y | |
332 | ||
14cf11af PM |
333 | config KEXEC |
334 | bool "kexec system call (EXPERIMENTAL)" | |
cb93d568 | 335 | depends on PPC_BOOK3S && EXPERIMENTAL |
14cf11af PM |
336 | help |
337 | kexec is a system call that implements the ability to shutdown your | |
338 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 339 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
340 | you can start any kernel with it, not just Linux. |
341 | ||
1f1332f7 | 342 | The name comes from the similarity to the exec system call. |
14cf11af PM |
343 | |
344 | It is an ongoing process to be certain the hardware in a machine | |
345 | is properly shutdown, so do not be surprised if this code does not | |
346 | initially work for you. It may help to enable device hotplugging | |
347 | support. As of this writing the exact hardware interface is | |
348 | strongly in flux, so no good recommendation can be made. | |
349 | ||
e8625d46 | 350 | config CRASH_DUMP |
3420b5da | 351 | bool "Build a kdump crash kernel" |
c6ac71a1 MK |
352 | depends on PPC64 || 6xx |
353 | select RELOCATABLE if PPC64 | |
e8625d46 HM |
354 | help |
355 | Build a kernel suitable for use as a kdump capture kernel. | |
54622f10 MK |
356 | The same kernel binary can be used as production kernel and dump |
357 | capture kernel. | |
e8625d46 | 358 | |
242f271c MA |
359 | config PHYP_DUMP |
360 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" | |
361 | depends on PPC_PSERIES && EXPERIMENTAL | |
362 | help | |
363 | Hypervisor-assisted dump is meant to be a kdump replacement | |
364 | offering robustness and speed not possible without system | |
692105b8 | 365 | hypervisor assistance. |
242f271c MA |
366 | |
367 | If unsure, say "N" | |
368 | ||
14cf11af PM |
369 | config PPCBUG_NVRAM |
370 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
371 | default y if PPC_PREP | |
372 | ||
373 | config IRQ_ALL_CPUS | |
374 | bool "Distribute interrupts on all CPUs by default" | |
375 | depends on SMP && !MV64360 | |
376 | help | |
377 | This option gives the kernel permission to distribute IRQs across | |
378 | multiple CPUs. Saying N here will route all IRQs to the first | |
379 | CPU. Generally saying Y is safe, although some problems have been | |
380 | reported with SMP Power Macintoshes with this option enabled. | |
381 | ||
ffa27b6b AW |
382 | config NUMA |
383 | bool "NUMA support" | |
384 | depends on PPC64 | |
385 | default y if SMP && PPC_PSERIES | |
386 | ||
c80d79d7 YG |
387 | config NODES_SHIFT |
388 | int | |
389 | default "4" | |
390 | depends on NEED_MULTIPLE_NODES | |
391 | ||
14cf11af PM |
392 | config ARCH_SELECT_MEMORY_MODEL |
393 | def_bool y | |
394 | depends on PPC64 | |
395 | ||
396 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
397 | def_bool y |
398 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 399 | |
45fb6cea | 400 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 401 | def_bool y |
9100b205 | 402 | depends on PPC64 |
d29eff7b | 403 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 404 | |
45fb6cea | 405 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 406 | def_bool y |
78bde53e | 407 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 408 | |
c67c3cb4 | 409 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 410 | def_bool y |
c67c3cb4 MG |
411 | |
412 | source "mm/Kconfig" | |
14cf11af | 413 | |
7e9191da MK |
414 | config ARCH_MEMORY_PROBE |
415 | def_bool y | |
416 | depends on MEMORY_HOTPLUG | |
417 | ||
75167957 AW |
418 | # Some NUMA nodes have memory ranges that span |
419 | # other nodes. Even though a pfn is valid and | |
420 | # between a node's start and end pfns, it may not | |
421 | # reside on that node. See memmap_init_zone() | |
422 | # for details. | |
423 | config NODES_SPAN_OTHER_NODES | |
424 | def_bool y | |
425 | depends on NEED_MULTIPLE_NODES | |
426 | ||
16c2d476 BH |
427 | config PPC_HAS_HASH_64K |
428 | bool | |
429 | depends on PPC64 | |
430 | default n | |
431 | ||
e1240122 YT |
432 | config STDBINUTILS |
433 | bool "Using standard binutils settings" | |
434 | depends on 44x | |
435 | default y | |
436 | help | |
437 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
438 | Note, that kernel will be able to run only those applications, | |
439 | which had been compiled using binutils later than 2.17.50.0.3 with | |
440 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
441 | the older binutils, you can patch them with a trivial patch, which | |
442 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
443 | ||
ca9153a3 IY |
444 | choice |
445 | prompt "Page size" | |
446 | default PPC_4K_PAGES | |
3c726f8d | 447 | help |
ca9153a3 IY |
448 | Select the kernel logical page size. Increasing the page size |
449 | will reduce software overhead at each page boundary, allow | |
450 | hardware prefetch mechanisms to be more effective, and allow | |
451 | larger dma transfers increasing IO efficiency and reducing | |
452 | overhead. However the utilization of memory will increase. | |
453 | For example, each cached file will using a multiple of the | |
454 | page size to hold its contents and the difference between the | |
455 | end of file and the end of page is wasted. | |
456 | ||
457 | Some dedicated systems, such as software raid serving with | |
458 | accelerated calculations, have shown significant increases. | |
459 | ||
460 | If you configure a 64 bit kernel for 64k pages but the | |
461 | processor does not support them, then the kernel will simulate | |
462 | them with 4k pages, loading them on demand, but with the | |
463 | reduced software overhead and larger internal fragmentation. | |
464 | For the 32 bit kernel, a large page option will not be offered | |
465 | unless it is supported by the configured processor. | |
466 | ||
467 | If unsure, choose 4K_PAGES. | |
468 | ||
469 | config PPC_4K_PAGES | |
470 | bool "4k page size" | |
471 | ||
472 | config PPC_16K_PAGES | |
473 | bool "16k page size" if 44x | |
474 | ||
475 | config PPC_64K_PAGES | |
476 | bool "64k page size" if 44x || PPC_STD_MMU_64 | |
477 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 | |
478 | ||
e1240122 YT |
479 | config PPC_256K_PAGES |
480 | bool "256k page size" if 44x | |
adf213c4 | 481 | depends on !STDBINUTILS |
e1240122 YT |
482 | help |
483 | Make the page size 256k. | |
484 | ||
485 | As the ELF standard only requires alignment to support page | |
486 | sizes up to 64k, you will need to compile all of your user | |
487 | space applications with a non-standard binutils settings | |
488 | (see the STDBINUTILS description for details). | |
489 | ||
490 | Say N unless you know what you are doing. | |
491 | ||
ca9153a3 | 492 | endchoice |
3c726f8d | 493 | |
53bcddb9 SR |
494 | config FORCE_MAX_ZONEORDER |
495 | int "Maximum zone order" | |
ca9153a3 IY |
496 | range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES |
497 | default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES | |
498 | range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES | |
499 | default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES | |
500 | range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES | |
501 | default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES | |
502 | range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES | |
503 | default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES | |
e1240122 YT |
504 | range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES |
505 | default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES | |
ebe40c5c | 506 | range 11 64 |
53bcddb9 SR |
507 | default "11" |
508 | help | |
509 | The kernel memory allocator divides physically contiguous memory | |
510 | blocks into "zones", where each zone is a power of two number of | |
511 | pages. This option selects the largest power of two that the kernel | |
512 | keeps in the memory allocator. If you need to allocate very large | |
513 | blocks of physically contiguous memory, then you may need to | |
514 | increase this value. | |
515 | ||
516 | This config option is actually maximum order plus one. For example, | |
517 | a value of 11 means that the largest free memory block is 2^10 pages. | |
518 | ||
519 | The page size is not necessarily 4KB. For example, on 64-bit | |
520 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
521 | this in mind when choosing a value for this option. | |
522 | ||
fa28237c PM |
523 | config PPC_SUBPAGE_PROT |
524 | bool "Support setting protections for 4k subpages" | |
ca9153a3 | 525 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
fa28237c PM |
526 | help |
527 | This option adds support for a system call to allow user programs | |
528 | to set access permissions (read/write, readonly, or no access) | |
529 | on the 4k subpages of each 64k page. | |
530 | ||
14cf11af PM |
531 | config SCHED_SMT |
532 | bool "SMT (Hyperthreading) scheduler support" | |
533 | depends on PPC64 && SMP | |
14cf11af PM |
534 | help |
535 | SMT scheduler support improves the CPU scheduler's decision making | |
536 | when dealing with POWER5 cpus at a cost of slightly increased | |
537 | overhead in some places. If unsure say N here. | |
538 | ||
539 | config PROC_DEVICETREE | |
5f296755 PM |
540 | bool "Support for device tree in /proc" |
541 | depends on PROC_FS | |
14cf11af PM |
542 | help |
543 | This option adds a device-tree directory under /proc which contains | |
544 | an image of the device tree that the kernel copies from Open | |
5f296755 | 545 | Firmware or other boot firmware. If unsure, say Y here. |
14cf11af | 546 | |
14cf11af PM |
547 | config CMDLINE_BOOL |
548 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
549 | |
550 | config CMDLINE | |
551 | string "Initial kernel command string" | |
552 | depends on CMDLINE_BOOL | |
553 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
554 | help | |
555 | On some platforms, there is currently no way for the boot loader to | |
556 | pass arguments to the kernel. For these platforms, you can supply | |
557 | some command-line options at build time by entering them here. In | |
558 | most cases you will need to specify the root device here. | |
559 | ||
c356aa45 GL |
560 | config EXTRA_TARGETS |
561 | string "Additional default image types" | |
562 | help | |
563 | List additional targets to be built by the bootwrapper here (separated | |
564 | by spaces). This is useful for targets that depend of device tree | |
565 | files in the .dts directory. | |
566 | ||
567 | Targets in this list will be build as part of the default build | |
568 | target, or when the user does a 'make zImage' or a | |
569 | 'make zImage.initrd'. | |
570 | ||
571 | If unsure, leave blank | |
572 | ||
14cf11af | 573 | if !44x || BROKEN |
b28f5081 JB |
574 | config ARCH_WANTS_FREEZER_CONTROL |
575 | def_bool y | |
576 | depends on ADB_PMU | |
577 | ||
14cf11af PM |
578 | source kernel/power/Kconfig |
579 | endif | |
580 | ||
581 | config SECCOMP | |
582 | bool "Enable seccomp to safely compute untrusted bytecode" | |
583 | depends on PROC_FS | |
584 | default y | |
585 | help | |
586 | This kernel feature is useful for number crunching applications | |
587 | that may need to compute untrusted bytecode during their | |
588 | execution. By using pipes or other transports made available to | |
589 | the process as file descriptors supporting the read/write | |
590 | syscalls, it's possible to isolate those applications in | |
591 | their own address space using seccomp. Once seccomp is | |
592 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
593 | and the task is only allowed to execute a few safe syscalls | |
594 | defined by each seccomp mode. | |
595 | ||
596 | If unsure, say Y. Only embedded should say N here. | |
597 | ||
598 | endmenu | |
599 | ||
600 | config ISA_DMA_API | |
601 | bool | |
373a6da1 | 602 | default !PPC_ISERIES || PCI |
14cf11af PM |
603 | |
604 | menu "Bus options" | |
605 | ||
606 | config ISA | |
607 | bool "Support for ISA-bus hardware" | |
608 | depends on PPC_PREP || PPC_CHRP | |
f9bd170a | 609 | select PPC_I8259 |
14cf11af PM |
610 | help |
611 | Find out whether you have ISA slots on your motherboard. ISA is the | |
612 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
613 | inside your box. If you have an Apple machine, say N here; if you | |
614 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If | |
615 | you have an embedded board, consult your board documentation. | |
616 | ||
5ac6da66 CL |
617 | config ZONE_DMA |
618 | bool | |
619 | default y | |
620 | ||
14cf11af PM |
621 | config GENERIC_ISA_DMA |
622 | bool | |
623 | depends on PPC64 || POWER4 || 6xx && !CPM2 | |
624 | default y | |
625 | ||
25635c71 PM |
626 | config PPC_INDIRECT_PCI |
627 | bool | |
628 | depends on PCI | |
63dafe57 | 629 | default y if 40x || 44x |
25635c71 PM |
630 | default n |
631 | ||
14cf11af PM |
632 | config EISA |
633 | bool | |
634 | ||
635 | config SBUS | |
636 | bool | |
637 | ||
08264cbc KG |
638 | config FSL_SOC |
639 | bool | |
640 | ||
55c44991 RZ |
641 | config FSL_PCI |
642 | bool | |
643 | select PPC_INDIRECT_PCI | |
d0839118 | 644 | select PCI_QUIRKS |
55c44991 | 645 | |
2a706919 SR |
646 | config 4xx_SOC |
647 | bool | |
648 | ||
acaa7aa3 AV |
649 | config FSL_LBC |
650 | bool | |
651 | help | |
652 | Freescale Localbus support | |
653 | ||
83ff9dcf AV |
654 | config FSL_GTM |
655 | bool | |
656 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
657 | help | |
658 | Freescale General-purpose Timers support | |
659 | ||
14cf11af PM |
660 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
661 | config MCA | |
662 | bool | |
663 | ||
b500563b JR |
664 | # Platforms that what PCI turned unconditionally just do select PCI |
665 | # in their config node. Platforms that want to choose at config | |
666 | # time should select PPC_PCI_CHOICE | |
667 | config PPC_PCI_CHOICE | |
668 | bool | |
669 | ||
14cf11af | 670 | config PCI |
b500563b JR |
671 | bool "PCI support" if PPC_PCI_CHOICE |
672 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
53158620 | 673 | && !PPC_85xx && !PPC_86xx |
f21f49ea | 674 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 675 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 676 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
677 | help |
678 | Find out whether your system includes a PCI bus. PCI is the name of | |
679 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
680 | your box. If you say Y here, the kernel will include drivers and | |
681 | infrastructure code to support PCI bus devices. | |
682 | ||
683 | config PCI_DOMAINS | |
36e23590 MW |
684 | def_bool PCI |
685 | ||
686 | config PCI_SYSCALL | |
687 | def_bool PCI | |
14cf11af | 688 | |
14cf11af PM |
689 | config PCI_QSPAN |
690 | bool "QSpan PCI" | |
691 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 692 | select PPC_I8259 |
14cf11af PM |
693 | help |
694 | Say Y here if you have a system based on a Motorola 8xx-series | |
695 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
696 | ||
697 | config PCI_8260 | |
698 | bool | |
699 | depends on PCI && 8260 | |
25635c71 | 700 | select PPC_INDIRECT_PCI |
14cf11af PM |
701 | default y |
702 | ||
703 | config 8260_PCI9 | |
4a3ecc62 | 704 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 705 | depends on PCI_8260 && !8272 |
14cf11af PM |
706 | default y |
707 | ||
708 | choice | |
4a3ecc62 | 709 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
710 | depends on 8260_PCI9 |
711 | ||
712 | config 8260_PCI9_IDMA1 | |
713 | bool "IDMA1" | |
714 | ||
715 | config 8260_PCI9_IDMA2 | |
716 | bool "IDMA2" | |
717 | ||
718 | config 8260_PCI9_IDMA3 | |
719 | bool "IDMA3" | |
720 | ||
721 | config 8260_PCI9_IDMA4 | |
722 | bool "IDMA4" | |
723 | ||
724 | endchoice | |
725 | ||
bb53bb3d JM |
726 | source "drivers/pci/pcie/Kconfig" |
727 | ||
14cf11af PM |
728 | source "drivers/pci/Kconfig" |
729 | ||
730 | source "drivers/pcmcia/Kconfig" | |
731 | ||
732 | source "drivers/pci/hotplug/Kconfig" | |
733 | ||
f1f389d5 ZW |
734 | config HAS_RAPIDIO |
735 | bool | |
736 | default n | |
737 | ||
738 | config RAPIDIO | |
739 | bool "RapidIO support" | |
740 | depends on HAS_RAPIDIO | |
741 | help | |
742 | If you say Y here, the kernel will include drivers and | |
743 | infrastructure code to support RapidIO interconnect devices. | |
744 | ||
745 | source "drivers/rapidio/Kconfig" | |
746 | ||
14cf11af PM |
747 | endmenu |
748 | ||
749 | menu "Advanced setup" | |
750 | depends on PPC32 | |
751 | ||
752 | config ADVANCED_OPTIONS | |
753 | bool "Prompt for advanced kernel configuration options" | |
754 | help | |
755 | This option will enable prompting for a variety of advanced kernel | |
756 | configuration options. These options can cause the kernel to not | |
757 | work if they are set incorrectly, but can be used to optimize certain | |
758 | aspects of kernel memory management. | |
759 | ||
760 | Unless you know what you are doing, say N here. | |
761 | ||
762 | comment "Default settings for advanced configuration options are used" | |
763 | depends on !ADVANCED_OPTIONS | |
764 | ||
14cf11af PM |
765 | config LOWMEM_SIZE_BOOL |
766 | bool "Set maximum low memory" | |
767 | depends on ADVANCED_OPTIONS | |
768 | help | |
769 | This option allows you to set the maximum amount of memory which | |
770 | will be used as "low memory", that is, memory which the kernel can | |
771 | access directly, without having to set up a kernel virtual mapping. | |
772 | This can be useful in optimizing the layout of kernel virtual | |
773 | memory. | |
774 | ||
775 | Say N here unless you know what you are doing. | |
776 | ||
777 | config LOWMEM_SIZE | |
778 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
779 | default "0x30000000" | |
780 | ||
96051465 TP |
781 | config LOWMEM_CAM_NUM_BOOL |
782 | bool "Set number of CAMs to use to map low memory" | |
783 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
784 | help | |
785 | This option allows you to set the maximum number of CAM slots that | |
786 | will be used to map low memory. There are a limited number of slots | |
787 | available and even more limited number that will fit in the L1 MMU. | |
788 | However, using more entries will allow mapping more low memory. This | |
789 | can be useful in optimizing the layout of kernel virtual memory. | |
790 | ||
791 | Say N here unless you know what you are doing. | |
792 | ||
793 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 794 | depends on FSL_BOOKE |
96051465 TP |
795 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
796 | default 3 | |
797 | ||
37dd2bad KG |
798 | config RELOCATABLE |
799 | bool "Build a relocatable kernel (EXPERIMENTAL)" | |
800 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
801 | help | |
802 | This builds a kernel image that is capable of running at the | |
803 | location the kernel is loaded at (some alignment restrictions may | |
804 | exist). | |
805 | ||
806 | One use is for the kexec on panic case where the recovery kernel | |
807 | must live at a different physical address than the primary | |
808 | kernel. | |
809 | ||
810 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
811 | it has been loaded at and the compile time physical addresses | |
812 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
813 | setting can still be useful to bootwrappers that need to know the | |
814 | load location of the kernel (eg. u-boot/mkimage). | |
815 | ||
816 | config PAGE_OFFSET_BOOL | |
817 | bool "Set custom page offset address" | |
818 | depends on ADVANCED_OPTIONS | |
819 | help | |
820 | This option allows you to set the kernel virtual address at which | |
821 | the kernel will map low memory. This can be useful in optimizing | |
822 | the virtual memory layout of the system. | |
823 | ||
824 | Say N here unless you know what you are doing. | |
825 | ||
826 | config PAGE_OFFSET | |
827 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
828 | default "0xc0000000" | |
829 | ||
14cf11af PM |
830 | config KERNEL_START_BOOL |
831 | bool "Set custom kernel base address" | |
832 | depends on ADVANCED_OPTIONS | |
833 | help | |
834 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
835 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
836 | however there are times (like kdump) that one might not want them | |
837 | to be the same. | |
14cf11af PM |
838 | |
839 | Say N here unless you know what you are doing. | |
840 | ||
841 | config KERNEL_START | |
842 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad KG |
843 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
844 | default "0xc2000000" if CRASH_DUMP | |
14cf11af PM |
845 | default "0xc0000000" |
846 | ||
37dd2bad KG |
847 | config PHYSICAL_START_BOOL |
848 | bool "Set physical address where the kernel is loaded" | |
849 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
850 | help | |
851 | This gives the physical address where the kernel is loaded. | |
852 | ||
853 | Say N here unless you know what you are doing. | |
854 | ||
855 | config PHYSICAL_START | |
856 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
857 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP | |
858 | default "0x00000000" | |
859 | ||
860 | config PHYSICAL_ALIGN | |
861 | hex | |
c8f3570b | 862 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
863 | help |
864 | This value puts the alignment restrictions on physical address | |
865 | where kernel is loaded and run from. Kernel is compiled for an | |
866 | address which meets above alignment restriction. | |
867 | ||
14cf11af PM |
868 | config TASK_SIZE_BOOL |
869 | bool "Set custom user task size" | |
870 | depends on ADVANCED_OPTIONS | |
871 | help | |
872 | This option allows you to set the amount of virtual address space | |
873 | allocated to user tasks. This can be useful in optimizing the | |
874 | virtual memory layout of the system. | |
875 | ||
876 | Say N here unless you know what you are doing. | |
877 | ||
878 | config TASK_SIZE | |
879 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
880 | default "0x80000000" if PPC_PREP || PPC_8xx |
881 | default "0xc0000000" | |
14cf11af | 882 | |
84532a0f BH |
883 | config CONSISTENT_SIZE_BOOL |
884 | bool "Set custom consistent memory pool size" | |
885 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
886 | help | |
887 | This option allows you to set the size of the | |
888 | consistent memory pool. This pool of virtual memory | |
889 | is used to make consistent memory allocations. | |
890 | ||
891 | config CONSISTENT_SIZE | |
892 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
893 | default "0x00200000" if NOT_COHERENT_CACHE | |
894 | ||
14cf11af PM |
895 | config PIN_TLB |
896 | bool "Pinned Kernel TLBs (860 ONLY)" | |
897 | depends on ADVANCED_OPTIONS && 8xx | |
898 | endmenu | |
899 | ||
cabb5587 | 900 | if PPC64 |
549e8152 PM |
901 | config RELOCATABLE |
902 | bool "Build a relocatable kernel" | |
903 | help | |
904 | This builds a kernel image that is capable of running anywhere | |
905 | in the RMA (real memory area) at any 16k-aligned base address. | |
906 | The kernel is linked as a position-independent executable (PIE) | |
907 | and contains dynamic relocations which are processed early | |
908 | in the bootup process. | |
909 | ||
910 | One use is for the kexec on panic case where the recovery kernel | |
911 | must live at a different physical address than the primary | |
912 | kernel. | |
913 | ||
37dd2bad KG |
914 | config PAGE_OFFSET |
915 | hex | |
916 | default "0xc000000000000000" | |
cabb5587 SR |
917 | config KERNEL_START |
918 | hex | |
eeb2d218 | 919 | default "0xc000000000000000" |
37dd2bad KG |
920 | config PHYSICAL_START |
921 | hex | |
37dd2bad | 922 | default "0x00000000" |
cabb5587 SR |
923 | endif |
924 | ||
14cf11af PM |
925 | source "net/Kconfig" |
926 | ||
927 | source "drivers/Kconfig" | |
928 | ||
929 | source "fs/Kconfig" | |
930 | ||
98658538 LY |
931 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
932 | ||
14cf11af PM |
933 | source "lib/Kconfig" |
934 | ||
14cf11af PM |
935 | source "arch/powerpc/Kconfig.debug" |
936 | ||
937 | source "security/Kconfig" | |
938 | ||
939 | config KEYS_COMPAT | |
940 | bool | |
941 | depends on COMPAT && KEYS | |
942 | default y | |
943 | ||
944 | source "crypto/Kconfig" | |
6f668280 DP |
945 | |
946 | config PPC_CLOCK | |
947 | bool | |
948 | default n | |
9483a578 | 949 | select HAVE_CLK |
1088a209 SM |
950 | |
951 | config PPC_LIB_RHEAP | |
952 | bool | |
953 | ||
bbf45ba5 | 954 | source "arch/powerpc/kvm/Kconfig" |