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