Commit | Line | Data |
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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_VSYSCALL |
33 | def_bool y | |
34 | ||
d831d0b8 TB |
35 | config GENERIC_CLOCKEVENTS |
36 | def_bool y | |
37 | ||
14cf11af PM |
38 | config GENERIC_HARDIRQS |
39 | bool | |
40 | default y | |
41 | ||
8e27f4da ME |
42 | config GENERIC_HARDIRQS_NO__DO_IRQ |
43 | bool | |
44 | default y | |
45 | ||
c2a7e818 | 46 | config HAVE_SETUP_PER_CPU_AREA |
e74e3962 TH |
47 | def_bool PPC64 |
48 | ||
c2a7e818 | 49 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
b32ef636 | 50 | def_bool PPC64 |
51 | ||
0d7012a9 IM |
52 | config IRQ_PER_CPU |
53 | bool | |
54 | default y | |
55 | ||
551b81f2 ME |
56 | config NR_IRQS |
57 | int "Number of virtual interrupt numbers" | |
859aefc5 | 58 | range 32 32768 |
551b81f2 ME |
59 | default "512" |
60 | help | |
61 | This defines the number of virtual interrupt numbers the kernel | |
62 | can manage. Virtual interrupt numbers are what you see in | |
63 | /proc/interrupts. If you configure your system to have too few, | |
64 | drivers will fail to load or worse - handle with care. | |
65 | ||
fd3e0bbc CH |
66 | config STACKTRACE_SUPPORT |
67 | bool | |
68 | default y | |
69 | ||
01f4b8b8 AB |
70 | config HAVE_LATENCYTOP_SUPPORT |
71 | def_bool y | |
72 | ||
945feb17 BH |
73 | config TRACE_IRQFLAGS_SUPPORT |
74 | bool | |
945feb17 BH |
75 | default y |
76 | ||
77 | config LOCKDEP_SUPPORT | |
78 | bool | |
79 | default y | |
80 | ||
14cf11af PM |
81 | config RWSEM_GENERIC_SPINLOCK |
82 | bool | |
83 | ||
84 | config RWSEM_XCHGADD_ALGORITHM | |
85 | bool | |
86 | default y | |
87 | ||
95c354fe NP |
88 | config GENERIC_LOCKBREAK |
89 | bool | |
90 | default y | |
91 | depends on SMP && PREEMPT | |
92 | ||
f0d1b0b3 DH |
93 | config ARCH_HAS_ILOG2_U32 |
94 | bool | |
ef55d53c | 95 | default y |
f0d1b0b3 DH |
96 | |
97 | config ARCH_HAS_ILOG2_U64 | |
98 | bool | |
ef55d53c | 99 | default y if 64BIT |
f0d1b0b3 | 100 | |
e779b2f9 AM |
101 | config GENERIC_HWEIGHT |
102 | bool | |
103 | default y | |
104 | ||
0a9cb46a JM |
105 | config GENERIC_FIND_NEXT_BIT |
106 | bool | |
107 | default y | |
108 | ||
b7ce3415 AV |
109 | config GENERIC_GPIO |
110 | bool | |
111 | help | |
112 | Generic GPIO API support | |
113 | ||
f057eac0 SR |
114 | config ARCH_NO_VIRT_TO_BUS |
115 | def_bool PPC64 | |
116 | ||
14cf11af PM |
117 | config PPC |
118 | bool | |
119 | default y | |
10f85f43 SR |
120 | select OF |
121 | select OF_FLATTREE | |
2b79d696 SR |
122 | select HAVE_FTRACE_MCOUNT_RECORD |
123 | select HAVE_DYNAMIC_FTRACE | |
606576ce | 124 | select HAVE_FUNCTION_TRACER |
60ce8f72 | 125 | select HAVE_FUNCTION_GRAPH_TRACER |
7444a72e | 126 | select ARCH_WANT_OPTIONAL_GPIOLIB |
ec7748b5 | 127 | select HAVE_IDE |
a1f242ff | 128 | select HAVE_IOREMAP_PROT |
58340a07 | 129 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
3f550096 | 130 | select HAVE_KPROBES |
17ce452f | 131 | select HAVE_ARCH_KGDB |
9edddaa2 | 132 | select HAVE_KRETPROBES |
dec2b0d0 | 133 | select HAVE_ARCH_TRACEHOOK |
95f72d1e | 134 | select HAVE_MEMBLOCK |
46bab4e4 | 135 | select HAVE_DMA_ATTRS |
80d3e8ab | 136 | select HAVE_DMA_API_DEBUG |
b7d7a240 | 137 | select USE_GENERIC_SMP_HELPERS if SMP |
4e491d14 | 138 | select HAVE_OPROFILE |
ee6a0932 | 139 | select HAVE_SYSCALL_WRAPPERS if PPC64 |
c2e95c6d | 140 | select GENERIC_ATOMIC64 if PPC32 |
cdd6c482 | 141 | select HAVE_PERF_EVENTS |
359e4284 | 142 | select HAVE_REGS_AND_STACK_ACCESS_API |
5aae8a53 | 143 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 |
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 | ||
175 | config PPC_UDBG_16550 | |
176 | bool | |
177 | default n | |
178 | ||
08264cbc KG |
179 | config GENERIC_TBSYNC |
180 | bool | |
181 | default y if PPC32 && SMP | |
182 | default n | |
183 | ||
e65e1fc2 AV |
184 | config AUDIT_ARCH |
185 | bool | |
186 | default y | |
187 | ||
73c9ceab JF |
188 | config GENERIC_BUG |
189 | bool | |
190 | default y | |
191 | depends on BUG | |
192 | ||
b3028878 | 193 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 194 | default y if PMAC_APM_EMU |
b3028878 JB |
195 | bool |
196 | ||
f4fc4a5b KG |
197 | config DEFAULT_UIMAGE |
198 | bool | |
199 | help | |
200 | Used to allow a board to specify it wants a uImage built by default | |
201 | default n | |
202 | ||
b09c1644 SW |
203 | config REDBOOT |
204 | bool | |
205 | ||
801e4062 JB |
206 | config ARCH_HIBERNATION_POSSIBLE |
207 | bool | |
543b9fd3 JB |
208 | default y |
209 | ||
f4cb5700 JB |
210 | config ARCH_SUSPEND_POSSIBLE |
211 | def_bool y | |
4ffd6952 | 212 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
32d8ad4e | 213 | PPC_85xx || PPC_86xx || PPC_PSERIES |
f4cb5700 | 214 | |
4c75a6f4 BH |
215 | config PPC_DCR_NATIVE |
216 | bool | |
217 | default n | |
218 | ||
219 | config PPC_DCR_MMIO | |
220 | bool | |
221 | default n | |
222 | ||
223 | config PPC_DCR | |
224 | bool | |
225 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
226 | default y | |
227 | ||
4c9d2800 BH |
228 | config PPC_OF_PLATFORM_PCI |
229 | bool | |
373a6da1 | 230 | depends on PCI |
4c9d2800 BH |
231 | depends on PPC64 # not supported on 32 bits yet |
232 | default n | |
233 | ||
6a11f75b AM |
234 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
235 | def_bool y | |
236 | ||
172ae2e7 DK |
237 | config PPC_ADV_DEBUG_REGS |
238 | bool | |
239 | depends on 40x || BOOKE | |
240 | default y | |
241 | ||
242 | config PPC_ADV_DEBUG_IACS | |
243 | int | |
244 | depends on PPC_ADV_DEBUG_REGS | |
245 | default 4 if 44x | |
246 | default 2 | |
247 | ||
248 | config PPC_ADV_DEBUG_DACS | |
249 | int | |
250 | depends on PPC_ADV_DEBUG_REGS | |
251 | default 2 | |
252 | ||
253 | config PPC_ADV_DEBUG_DVCS | |
254 | int | |
255 | depends on PPC_ADV_DEBUG_REGS | |
256 | default 2 if 44x | |
257 | default 0 | |
258 | ||
259 | config PPC_ADV_DEBUG_DAC_RANGE | |
260 | bool | |
261 | depends on PPC_ADV_DEBUG_REGS && 44x | |
262 | default y | |
263 | ||
14cf11af PM |
264 | source "init/Kconfig" |
265 | ||
dc52ddc0 MH |
266 | source "kernel/Kconfig.freezer" |
267 | ||
a2d2e1ec | 268 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 269 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 270 | |
14cf11af PM |
271 | menu "Kernel options" |
272 | ||
273 | config HIGHMEM | |
274 | bool "High memory support" | |
275 | depends on PPC32 | |
276 | ||
1ad74998 | 277 | source kernel/time/Kconfig |
14cf11af PM |
278 | source kernel/Kconfig.hz |
279 | source kernel/Kconfig.preempt | |
280 | source "fs/Kconfig.binfmt" | |
281 | ||
ba72cb8c MG |
282 | config HUGETLB_PAGE_SIZE_VARIABLE |
283 | bool | |
284 | depends on HUGETLB_PAGE | |
285 | default y | |
286 | ||
14cf11af PM |
287 | config MATH_EMULATION |
288 | bool "Math emulation" | |
4d52719a | 289 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
290 | ---help--- |
291 | Some PowerPC chips designed for embedded applications do not have | |
292 | a floating-point unit and therefore do not implement the | |
293 | floating-point instructions in the PowerPC instruction set. If you | |
294 | say Y here, the kernel will include code to emulate a floating-point | |
295 | unit, which will allow programs that use floating-point | |
296 | instructions to run. | |
297 | ||
5dd57a13 SW |
298 | config 8XX_MINIMAL_FPEMU |
299 | bool "Minimal math emulation for 8xx" | |
300 | depends on 8xx && !MATH_EMULATION | |
301 | help | |
302 | Older arch/ppc kernels still emulated a few floating point | |
303 | instructions such as load and store, even when full math | |
304 | emulation is disabled. Say "Y" here if you want to preserve | |
305 | this behavior. | |
306 | ||
307 | It is recommended that you build a soft-float userspace instead. | |
308 | ||
fb3475e9 FT |
309 | config IOMMU_HELPER |
310 | def_bool PPC64 | |
311 | ||
ec3cf2ec BB |
312 | config SWIOTLB |
313 | bool "SWIOTLB support" | |
314 | default n | |
315 | select IOMMU_HELPER | |
316 | ---help--- | |
317 | Support for IO bounce buffering for systems without an IOMMU. | |
318 | This allows us to DMA to the full physical address space on | |
319 | platforms where the size of a physical address is larger | |
320 | than the bus address. Not all platforms support this. | |
321 | ||
14cf11af PM |
322 | config HOTPLUG_CPU |
323 | bool "Support for enabling/disabling CPUs" | |
324 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) | |
325 | ---help--- | |
326 | Say Y here to be able to disable and re-enable individual | |
327 | CPUs at runtime on SMP machines. | |
328 | ||
329 | Say N if you are unsure. | |
330 | ||
12633e80 NF |
331 | config ARCH_CPU_PROBE_RELEASE |
332 | def_bool y | |
333 | depends on HOTPLUG_CPU | |
334 | ||
cc57637b YG |
335 | config ARCH_ENABLE_MEMORY_HOTPLUG |
336 | def_bool y | |
337 | ||
a99824f3 BP |
338 | config ARCH_HAS_WALK_MEMORY |
339 | def_bool y | |
340 | ||
1482471d BP |
341 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
342 | def_bool y | |
343 | ||
14cf11af PM |
344 | config KEXEC |
345 | bool "kexec system call (EXPERIMENTAL)" | |
f933a41e | 346 | depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL |
14cf11af PM |
347 | help |
348 | kexec is a system call that implements the ability to shutdown your | |
349 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 350 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
351 | you can start any kernel with it, not just Linux. |
352 | ||
1f1332f7 | 353 | The name comes from the similarity to the exec system call. |
14cf11af PM |
354 | |
355 | It is an ongoing process to be certain the hardware in a machine | |
356 | is properly shutdown, so do not be surprised if this code does not | |
357 | initially work for you. It may help to enable device hotplugging | |
358 | support. As of this writing the exact hardware interface is | |
359 | strongly in flux, so no good recommendation can be made. | |
360 | ||
e8625d46 | 361 | config CRASH_DUMP |
3420b5da | 362 | bool "Build a kdump crash kernel" |
f933a41e MM |
363 | depends on PPC64 || 6xx || FSL_BOOKE |
364 | select RELOCATABLE if PPC64 || FSL_BOOKE | |
e8625d46 HM |
365 | help |
366 | Build a kernel suitable for use as a kdump capture kernel. | |
54622f10 MK |
367 | The same kernel binary can be used as production kernel and dump |
368 | capture kernel. | |
e8625d46 | 369 | |
242f271c MA |
370 | config PHYP_DUMP |
371 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" | |
372 | depends on PPC_PSERIES && EXPERIMENTAL | |
373 | help | |
374 | Hypervisor-assisted dump is meant to be a kdump replacement | |
375 | offering robustness and speed not possible without system | |
692105b8 | 376 | hypervisor assistance. |
242f271c MA |
377 | |
378 | If unsure, say "N" | |
379 | ||
14cf11af PM |
380 | config PPCBUG_NVRAM |
381 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
382 | default y if PPC_PREP | |
383 | ||
384 | config IRQ_ALL_CPUS | |
385 | bool "Distribute interrupts on all CPUs by default" | |
386 | depends on SMP && !MV64360 | |
387 | help | |
388 | This option gives the kernel permission to distribute IRQs across | |
389 | multiple CPUs. Saying N here will route all IRQs to the first | |
390 | CPU. Generally saying Y is safe, although some problems have been | |
391 | reported with SMP Power Macintoshes with this option enabled. | |
392 | ||
cd015707 ME |
393 | config SPARSE_IRQ |
394 | bool "Support sparse irq numbering" | |
9ce91685 | 395 | default n |
cd015707 ME |
396 | help |
397 | This enables support for sparse irqs. This is useful for distro | |
398 | kernels that want to define a high CONFIG_NR_CPUS value but still | |
399 | want to have low kernel memory footprint on smaller machines. | |
400 | ||
401 | ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread | |
402 | out the irq_desc[] array in a more NUMA-friendly way. ) | |
403 | ||
9ce91685 | 404 | If you don't know what to do here, say N. |
cd015707 | 405 | |
ffa27b6b AW |
406 | config NUMA |
407 | bool "NUMA support" | |
408 | depends on PPC64 | |
409 | default y if SMP && PPC_PSERIES | |
410 | ||
c80d79d7 YG |
411 | config NODES_SHIFT |
412 | int | |
ea55bf29 | 413 | default "8" if PPC64 |
c80d79d7 YG |
414 | default "4" |
415 | depends on NEED_MULTIPLE_NODES | |
416 | ||
ea55bf29 AB |
417 | config MAX_ACTIVE_REGIONS |
418 | int | |
419 | default "256" if PPC64 | |
420 | default "32" | |
421 | ||
14cf11af PM |
422 | config ARCH_SELECT_MEMORY_MODEL |
423 | def_bool y | |
424 | depends on PPC64 | |
425 | ||
426 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
427 | def_bool y |
428 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 429 | |
45fb6cea | 430 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 431 | def_bool y |
9100b205 | 432 | depends on PPC64 |
d29eff7b | 433 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 434 | |
45fb6cea | 435 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 436 | def_bool y |
78bde53e | 437 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 438 | |
c67c3cb4 | 439 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 440 | def_bool y |
c67c3cb4 | 441 | |
5a1eb5c4 BH |
442 | config SYS_SUPPORTS_HUGETLBFS |
443 | def_bool y | |
444 | depends on PPC_BOOK3S_64 | |
445 | ||
c67c3cb4 | 446 | source "mm/Kconfig" |
14cf11af | 447 | |
7e9191da MK |
448 | config ARCH_MEMORY_PROBE |
449 | def_bool y | |
450 | depends on MEMORY_HOTPLUG | |
451 | ||
75167957 AW |
452 | # Some NUMA nodes have memory ranges that span |
453 | # other nodes. Even though a pfn is valid and | |
454 | # between a node's start and end pfns, it may not | |
455 | # reside on that node. See memmap_init_zone() | |
456 | # for details. | |
457 | config NODES_SPAN_OTHER_NODES | |
458 | def_bool y | |
459 | depends on NEED_MULTIPLE_NODES | |
460 | ||
16c2d476 BH |
461 | config PPC_HAS_HASH_64K |
462 | bool | |
463 | depends on PPC64 | |
464 | default n | |
465 | ||
e1240122 YT |
466 | config STDBINUTILS |
467 | bool "Using standard binutils settings" | |
468 | depends on 44x | |
469 | default y | |
470 | help | |
471 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
472 | Note, that kernel will be able to run only those applications, | |
473 | which had been compiled using binutils later than 2.17.50.0.3 with | |
474 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
475 | the older binutils, you can patch them with a trivial patch, which | |
476 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
477 | ||
ca9153a3 IY |
478 | choice |
479 | prompt "Page size" | |
480 | default PPC_4K_PAGES | |
3c726f8d | 481 | help |
ca9153a3 IY |
482 | Select the kernel logical page size. Increasing the page size |
483 | will reduce software overhead at each page boundary, allow | |
484 | hardware prefetch mechanisms to be more effective, and allow | |
485 | larger dma transfers increasing IO efficiency and reducing | |
486 | overhead. However the utilization of memory will increase. | |
487 | For example, each cached file will using a multiple of the | |
488 | page size to hold its contents and the difference between the | |
489 | end of file and the end of page is wasted. | |
490 | ||
491 | Some dedicated systems, such as software raid serving with | |
492 | accelerated calculations, have shown significant increases. | |
493 | ||
494 | If you configure a 64 bit kernel for 64k pages but the | |
495 | processor does not support them, then the kernel will simulate | |
496 | them with 4k pages, loading them on demand, but with the | |
497 | reduced software overhead and larger internal fragmentation. | |
498 | For the 32 bit kernel, a large page option will not be offered | |
499 | unless it is supported by the configured processor. | |
500 | ||
501 | If unsure, choose 4K_PAGES. | |
502 | ||
503 | config PPC_4K_PAGES | |
504 | bool "4k page size" | |
505 | ||
506 | config PPC_16K_PAGES | |
507 | bool "16k page size" if 44x | |
508 | ||
509 | config PPC_64K_PAGES | |
2d27cfd3 | 510 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
ca9153a3 IY |
511 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
512 | ||
e1240122 YT |
513 | config PPC_256K_PAGES |
514 | bool "256k page size" if 44x | |
adf213c4 | 515 | depends on !STDBINUTILS |
e1240122 YT |
516 | help |
517 | Make the page size 256k. | |
518 | ||
519 | As the ELF standard only requires alignment to support page | |
520 | sizes up to 64k, you will need to compile all of your user | |
521 | space applications with a non-standard binutils settings | |
522 | (see the STDBINUTILS description for details). | |
523 | ||
524 | Say N unless you know what you are doing. | |
525 | ||
ca9153a3 | 526 | endchoice |
3c726f8d | 527 | |
53bcddb9 SR |
528 | config FORCE_MAX_ZONEORDER |
529 | int "Maximum zone order" | |
066c4b87 BH |
530 | range 9 64 if PPC64 && PPC_64K_PAGES |
531 | default "9" if PPC64 && PPC_64K_PAGES | |
532 | range 13 64 if PPC64 && !PPC_64K_PAGES | |
533 | default "13" if PPC64 && !PPC_64K_PAGES | |
534 | range 9 64 if PPC32 && PPC_16K_PAGES | |
535 | default "9" if PPC32 && PPC_16K_PAGES | |
536 | range 7 64 if PPC32 && PPC_64K_PAGES | |
537 | default "7" if PPC32 && PPC_64K_PAGES | |
538 | range 5 64 if PPC32 && PPC_256K_PAGES | |
539 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 540 | range 11 64 |
53bcddb9 SR |
541 | default "11" |
542 | help | |
543 | The kernel memory allocator divides physically contiguous memory | |
544 | blocks into "zones", where each zone is a power of two number of | |
545 | pages. This option selects the largest power of two that the kernel | |
546 | keeps in the memory allocator. If you need to allocate very large | |
547 | blocks of physically contiguous memory, then you may need to | |
548 | increase this value. | |
549 | ||
550 | This config option is actually maximum order plus one. For example, | |
551 | a value of 11 means that the largest free memory block is 2^10 pages. | |
552 | ||
553 | The page size is not necessarily 4KB. For example, on 64-bit | |
554 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
555 | this in mind when choosing a value for this option. | |
556 | ||
fa28237c PM |
557 | config PPC_SUBPAGE_PROT |
558 | bool "Support setting protections for 4k subpages" | |
ca9153a3 | 559 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
fa28237c PM |
560 | help |
561 | This option adds support for a system call to allow user programs | |
562 | to set access permissions (read/write, readonly, or no access) | |
563 | on the 4k subpages of each 64k page. | |
564 | ||
14cf11af PM |
565 | config SCHED_SMT |
566 | bool "SMT (Hyperthreading) scheduler support" | |
567 | depends on PPC64 && SMP | |
14cf11af PM |
568 | help |
569 | SMT scheduler support improves the CPU scheduler's decision making | |
570 | when dealing with POWER5 cpus at a cost of slightly increased | |
571 | overhead in some places. If unsure say N here. | |
572 | ||
14cf11af PM |
573 | config CMDLINE_BOOL |
574 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
575 | |
576 | config CMDLINE | |
577 | string "Initial kernel command string" | |
578 | depends on CMDLINE_BOOL | |
579 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
580 | help | |
581 | On some platforms, there is currently no way for the boot loader to | |
582 | pass arguments to the kernel. For these platforms, you can supply | |
583 | some command-line options at build time by entering them here. In | |
584 | most cases you will need to specify the root device here. | |
585 | ||
c356aa45 GL |
586 | config EXTRA_TARGETS |
587 | string "Additional default image types" | |
588 | help | |
589 | List additional targets to be built by the bootwrapper here (separated | |
590 | by spaces). This is useful for targets that depend of device tree | |
591 | files in the .dts directory. | |
592 | ||
593 | Targets in this list will be build as part of the default build | |
594 | target, or when the user does a 'make zImage' or a | |
595 | 'make zImage.initrd'. | |
596 | ||
597 | If unsure, leave blank | |
598 | ||
14cf11af | 599 | if !44x || BROKEN |
b28f5081 JB |
600 | config ARCH_WANTS_FREEZER_CONTROL |
601 | def_bool y | |
602 | depends on ADB_PMU | |
603 | ||
14cf11af PM |
604 | source kernel/power/Kconfig |
605 | endif | |
606 | ||
607 | config SECCOMP | |
608 | bool "Enable seccomp to safely compute untrusted bytecode" | |
609 | depends on PROC_FS | |
610 | default y | |
611 | help | |
612 | This kernel feature is useful for number crunching applications | |
613 | that may need to compute untrusted bytecode during their | |
614 | execution. By using pipes or other transports made available to | |
615 | the process as file descriptors supporting the read/write | |
616 | syscalls, it's possible to isolate those applications in | |
617 | their own address space using seccomp. Once seccomp is | |
618 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
619 | and the task is only allowed to execute a few safe syscalls | |
620 | defined by each seccomp mode. | |
621 | ||
622 | If unsure, say Y. Only embedded should say N here. | |
623 | ||
624 | endmenu | |
625 | ||
626 | config ISA_DMA_API | |
627 | bool | |
373a6da1 | 628 | default !PPC_ISERIES || PCI |
14cf11af PM |
629 | |
630 | menu "Bus options" | |
631 | ||
632 | config ISA | |
633 | bool "Support for ISA-bus hardware" | |
634 | depends on PPC_PREP || PPC_CHRP | |
f9bd170a | 635 | select PPC_I8259 |
14cf11af PM |
636 | help |
637 | Find out whether you have ISA slots on your motherboard. ISA is the | |
638 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
639 | inside your box. If you have an Apple machine, say N here; if you | |
640 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If | |
641 | you have an embedded board, consult your board documentation. | |
642 | ||
5ac6da66 CL |
643 | config ZONE_DMA |
644 | bool | |
645 | default y | |
646 | ||
af407c6d FT |
647 | config NEED_DMA_MAP_STATE |
648 | def_bool (PPC64 || NOT_COHERENT_CACHE) | |
649 | ||
e32205eb FT |
650 | config NEED_SG_DMA_LENGTH |
651 | def_bool y | |
652 | ||
14cf11af PM |
653 | config GENERIC_ISA_DMA |
654 | bool | |
1927445a | 655 | depends on ISA_DMA_API |
14cf11af PM |
656 | default y |
657 | ||
25635c71 PM |
658 | config PPC_INDIRECT_PCI |
659 | bool | |
660 | depends on PCI | |
63dafe57 | 661 | default y if 40x || 44x |
25635c71 PM |
662 | default n |
663 | ||
14cf11af PM |
664 | config EISA |
665 | bool | |
666 | ||
667 | config SBUS | |
668 | bool | |
669 | ||
08264cbc KG |
670 | config FSL_SOC |
671 | bool | |
672 | ||
55c44991 RZ |
673 | config FSL_PCI |
674 | bool | |
675 | select PPC_INDIRECT_PCI | |
d0839118 | 676 | select PCI_QUIRKS |
55c44991 | 677 | |
4ffd6952 AV |
678 | config FSL_PMC |
679 | bool | |
680 | default y | |
681 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
682 | help | |
683 | Freescale MPC85xx/MPC86xx power management controller support | |
684 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
685 | ||
2a706919 SR |
686 | config 4xx_SOC |
687 | bool | |
688 | ||
acaa7aa3 AV |
689 | config FSL_LBC |
690 | bool | |
691 | help | |
692 | Freescale Localbus support | |
693 | ||
83ff9dcf AV |
694 | config FSL_GTM |
695 | bool | |
696 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
697 | help | |
698 | Freescale General-purpose Timers support | |
699 | ||
14cf11af PM |
700 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
701 | config MCA | |
702 | bool | |
703 | ||
b500563b JR |
704 | # Platforms that what PCI turned unconditionally just do select PCI |
705 | # in their config node. Platforms that want to choose at config | |
706 | # time should select PPC_PCI_CHOICE | |
707 | config PPC_PCI_CHOICE | |
708 | bool | |
709 | ||
14cf11af | 710 | config PCI |
b500563b JR |
711 | bool "PCI support" if PPC_PCI_CHOICE |
712 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
bcc48591 | 713 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
f21f49ea | 714 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 715 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 716 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
717 | help |
718 | Find out whether your system includes a PCI bus. PCI is the name of | |
719 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
720 | your box. If you say Y here, the kernel will include drivers and | |
721 | infrastructure code to support PCI bus devices. | |
722 | ||
723 | config PCI_DOMAINS | |
36e23590 MW |
724 | def_bool PCI |
725 | ||
726 | config PCI_SYSCALL | |
727 | def_bool PCI | |
14cf11af | 728 | |
14cf11af PM |
729 | config PCI_QSPAN |
730 | bool "QSpan PCI" | |
731 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 732 | select PPC_I8259 |
14cf11af PM |
733 | help |
734 | Say Y here if you have a system based on a Motorola 8xx-series | |
735 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
736 | ||
737 | config PCI_8260 | |
738 | bool | |
739 | depends on PCI && 8260 | |
25635c71 | 740 | select PPC_INDIRECT_PCI |
14cf11af PM |
741 | default y |
742 | ||
743 | config 8260_PCI9 | |
4a3ecc62 | 744 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 745 | depends on PCI_8260 && !8272 |
14cf11af PM |
746 | default y |
747 | ||
748 | choice | |
4a3ecc62 | 749 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
750 | depends on 8260_PCI9 |
751 | ||
752 | config 8260_PCI9_IDMA1 | |
753 | bool "IDMA1" | |
754 | ||
755 | config 8260_PCI9_IDMA2 | |
756 | bool "IDMA2" | |
757 | ||
758 | config 8260_PCI9_IDMA3 | |
759 | bool "IDMA3" | |
760 | ||
761 | config 8260_PCI9_IDMA4 | |
762 | bool "IDMA4" | |
763 | ||
764 | endchoice | |
765 | ||
bb53bb3d JM |
766 | source "drivers/pci/pcie/Kconfig" |
767 | ||
14cf11af PM |
768 | source "drivers/pci/Kconfig" |
769 | ||
770 | source "drivers/pcmcia/Kconfig" | |
771 | ||
772 | source "drivers/pci/hotplug/Kconfig" | |
773 | ||
f1f389d5 ZW |
774 | config HAS_RAPIDIO |
775 | bool | |
776 | default n | |
777 | ||
778 | config RAPIDIO | |
779 | bool "RapidIO support" | |
780 | depends on HAS_RAPIDIO | |
781 | help | |
782 | If you say Y here, the kernel will include drivers and | |
783 | infrastructure code to support RapidIO interconnect devices. | |
784 | ||
785 | source "drivers/rapidio/Kconfig" | |
786 | ||
14cf11af PM |
787 | endmenu |
788 | ||
789 | menu "Advanced setup" | |
790 | depends on PPC32 | |
791 | ||
792 | config ADVANCED_OPTIONS | |
793 | bool "Prompt for advanced kernel configuration options" | |
794 | help | |
795 | This option will enable prompting for a variety of advanced kernel | |
796 | configuration options. These options can cause the kernel to not | |
797 | work if they are set incorrectly, but can be used to optimize certain | |
798 | aspects of kernel memory management. | |
799 | ||
800 | Unless you know what you are doing, say N here. | |
801 | ||
802 | comment "Default settings for advanced configuration options are used" | |
803 | depends on !ADVANCED_OPTIONS | |
804 | ||
14cf11af PM |
805 | config LOWMEM_SIZE_BOOL |
806 | bool "Set maximum low memory" | |
807 | depends on ADVANCED_OPTIONS | |
808 | help | |
809 | This option allows you to set the maximum amount of memory which | |
810 | will be used as "low memory", that is, memory which the kernel can | |
811 | access directly, without having to set up a kernel virtual mapping. | |
812 | This can be useful in optimizing the layout of kernel virtual | |
813 | memory. | |
814 | ||
815 | Say N here unless you know what you are doing. | |
816 | ||
817 | config LOWMEM_SIZE | |
818 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
819 | default "0x30000000" | |
820 | ||
96051465 TP |
821 | config LOWMEM_CAM_NUM_BOOL |
822 | bool "Set number of CAMs to use to map low memory" | |
823 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
824 | help | |
825 | This option allows you to set the maximum number of CAM slots that | |
826 | will be used to map low memory. There are a limited number of slots | |
827 | available and even more limited number that will fit in the L1 MMU. | |
828 | However, using more entries will allow mapping more low memory. This | |
829 | can be useful in optimizing the layout of kernel virtual memory. | |
830 | ||
831 | Say N here unless you know what you are doing. | |
832 | ||
833 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 834 | depends on FSL_BOOKE |
96051465 TP |
835 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
836 | default 3 | |
837 | ||
37dd2bad KG |
838 | config RELOCATABLE |
839 | bool "Build a relocatable kernel (EXPERIMENTAL)" | |
840 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
841 | help | |
842 | This builds a kernel image that is capable of running at the | |
843 | location the kernel is loaded at (some alignment restrictions may | |
844 | exist). | |
845 | ||
846 | One use is for the kexec on panic case where the recovery kernel | |
847 | must live at a different physical address than the primary | |
848 | kernel. | |
849 | ||
850 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
851 | it has been loaded at and the compile time physical addresses | |
852 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
853 | setting can still be useful to bootwrappers that need to know the | |
854 | load location of the kernel (eg. u-boot/mkimage). | |
855 | ||
856 | config PAGE_OFFSET_BOOL | |
857 | bool "Set custom page offset address" | |
858 | depends on ADVANCED_OPTIONS | |
859 | help | |
860 | This option allows you to set the kernel virtual address at which | |
861 | the kernel will map low memory. This can be useful in optimizing | |
862 | the virtual memory layout of the system. | |
863 | ||
864 | Say N here unless you know what you are doing. | |
865 | ||
866 | config PAGE_OFFSET | |
867 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
868 | default "0xc0000000" | |
869 | ||
14cf11af PM |
870 | config KERNEL_START_BOOL |
871 | bool "Set custom kernel base address" | |
872 | depends on ADVANCED_OPTIONS | |
873 | help | |
874 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
875 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
876 | however there are times (like kdump) that one might not want them | |
877 | to be the same. | |
14cf11af PM |
878 | |
879 | Say N here unless you know what you are doing. | |
880 | ||
881 | config KERNEL_START | |
882 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad | 883 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
f933a41e | 884 | default "0xc2000000" if CRASH_DUMP && !RELOCATABLE |
14cf11af PM |
885 | default "0xc0000000" |
886 | ||
37dd2bad KG |
887 | config PHYSICAL_START_BOOL |
888 | bool "Set physical address where the kernel is loaded" | |
889 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
890 | help | |
891 | This gives the physical address where the kernel is loaded. | |
892 | ||
893 | Say N here unless you know what you are doing. | |
894 | ||
895 | config PHYSICAL_START | |
896 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
f933a41e | 897 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE |
37dd2bad KG |
898 | default "0x00000000" |
899 | ||
900 | config PHYSICAL_ALIGN | |
901 | hex | |
c8f3570b | 902 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
903 | help |
904 | This value puts the alignment restrictions on physical address | |
905 | where kernel is loaded and run from. Kernel is compiled for an | |
906 | address which meets above alignment restriction. | |
907 | ||
14cf11af PM |
908 | config TASK_SIZE_BOOL |
909 | bool "Set custom user task size" | |
910 | depends on ADVANCED_OPTIONS | |
911 | help | |
912 | This option allows you to set the amount of virtual address space | |
913 | allocated to user tasks. This can be useful in optimizing the | |
914 | virtual memory layout of the system. | |
915 | ||
916 | Say N here unless you know what you are doing. | |
917 | ||
918 | config TASK_SIZE | |
919 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
920 | default "0x80000000" if PPC_PREP || PPC_8xx |
921 | default "0xc0000000" | |
14cf11af | 922 | |
84532a0f BH |
923 | config CONSISTENT_SIZE_BOOL |
924 | bool "Set custom consistent memory pool size" | |
925 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
926 | help | |
927 | This option allows you to set the size of the | |
928 | consistent memory pool. This pool of virtual memory | |
929 | is used to make consistent memory allocations. | |
930 | ||
931 | config CONSISTENT_SIZE | |
932 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
933 | default "0x00200000" if NOT_COHERENT_CACHE | |
934 | ||
14cf11af PM |
935 | config PIN_TLB |
936 | bool "Pinned Kernel TLBs (860 ONLY)" | |
937 | depends on ADVANCED_OPTIONS && 8xx | |
938 | endmenu | |
939 | ||
cabb5587 | 940 | if PPC64 |
549e8152 PM |
941 | config RELOCATABLE |
942 | bool "Build a relocatable kernel" | |
943 | help | |
944 | This builds a kernel image that is capable of running anywhere | |
945 | in the RMA (real memory area) at any 16k-aligned base address. | |
946 | The kernel is linked as a position-independent executable (PIE) | |
947 | and contains dynamic relocations which are processed early | |
948 | in the bootup process. | |
949 | ||
950 | One use is for the kexec on panic case where the recovery kernel | |
951 | must live at a different physical address than the primary | |
952 | kernel. | |
953 | ||
37dd2bad KG |
954 | config PAGE_OFFSET |
955 | hex | |
956 | default "0xc000000000000000" | |
cabb5587 SR |
957 | config KERNEL_START |
958 | hex | |
eeb2d218 | 959 | default "0xc000000000000000" |
37dd2bad KG |
960 | config PHYSICAL_START |
961 | hex | |
37dd2bad | 962 | default "0x00000000" |
cabb5587 SR |
963 | endif |
964 | ||
14cf11af PM |
965 | source "net/Kconfig" |
966 | ||
967 | source "drivers/Kconfig" | |
968 | ||
969 | source "fs/Kconfig" | |
970 | ||
98658538 LY |
971 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
972 | ||
14cf11af PM |
973 | source "lib/Kconfig" |
974 | ||
14cf11af PM |
975 | source "arch/powerpc/Kconfig.debug" |
976 | ||
977 | source "security/Kconfig" | |
978 | ||
979 | config KEYS_COMPAT | |
980 | bool | |
981 | depends on COMPAT && KEYS | |
982 | default y | |
983 | ||
984 | source "crypto/Kconfig" | |
6f668280 DP |
985 | |
986 | config PPC_CLOCK | |
987 | bool | |
988 | default n | |
9483a578 | 989 | select HAVE_CLK |
1088a209 SM |
990 | |
991 | config PPC_LIB_RHEAP | |
992 | bool | |
993 | ||
bbf45ba5 | 994 | source "arch/powerpc/kvm/Kconfig" |