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 |
e360adbe | 141 | select HAVE_IRQ_WORK |
cdd6c482 | 142 | select HAVE_PERF_EVENTS |
359e4284 | 143 | select HAVE_REGS_AND_STACK_ACCESS_API |
5aae8a53 | 144 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 |
14cf11af PM |
145 | |
146 | config EARLY_PRINTK | |
147 | bool | |
51d3082f | 148 | default y |
14cf11af PM |
149 | |
150 | config COMPAT | |
151 | bool | |
152 | default y if PPC64 | |
01e31dba | 153 | select COMPAT_BINFMT_ELF |
14cf11af PM |
154 | |
155 | config SYSVIPC_COMPAT | |
156 | bool | |
157 | depends on COMPAT && SYSVIPC | |
158 | default y | |
159 | ||
160 | # All PPC32s use generic nvram driver through ppc_md | |
161 | config GENERIC_NVRAM | |
162 | bool | |
163 | default y if PPC32 | |
164 | ||
ae1e9130 | 165 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
166 | bool |
167 | default y | |
168 | ||
169 | config ARCH_MAY_HAVE_PC_FDC | |
170 | bool | |
bed59275 | 171 | default !PPC_PSERIES || PCI |
14cf11af | 172 | |
08264cbc KG |
173 | config PPC_OF |
174 | def_bool y | |
175 | ||
176 | config PPC_UDBG_16550 | |
177 | bool | |
178 | default n | |
179 | ||
08264cbc KG |
180 | config GENERIC_TBSYNC |
181 | bool | |
182 | default y if PPC32 && SMP | |
183 | default n | |
184 | ||
e65e1fc2 AV |
185 | config AUDIT_ARCH |
186 | bool | |
187 | default y | |
188 | ||
73c9ceab JF |
189 | config GENERIC_BUG |
190 | bool | |
191 | default y | |
192 | depends on BUG | |
193 | ||
b3028878 | 194 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 195 | default y if PMAC_APM_EMU |
b3028878 JB |
196 | bool |
197 | ||
f4fc4a5b KG |
198 | config DEFAULT_UIMAGE |
199 | bool | |
200 | help | |
201 | Used to allow a board to specify it wants a uImage built by default | |
202 | default n | |
203 | ||
b09c1644 SW |
204 | config REDBOOT |
205 | bool | |
206 | ||
801e4062 JB |
207 | config ARCH_HIBERNATION_POSSIBLE |
208 | bool | |
543b9fd3 JB |
209 | default y |
210 | ||
f4cb5700 JB |
211 | config ARCH_SUSPEND_POSSIBLE |
212 | def_bool y | |
4ffd6952 | 213 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
32d8ad4e | 214 | PPC_85xx || PPC_86xx || PPC_PSERIES |
f4cb5700 | 215 | |
4c75a6f4 BH |
216 | config PPC_DCR_NATIVE |
217 | bool | |
218 | default n | |
219 | ||
220 | config PPC_DCR_MMIO | |
221 | bool | |
222 | default n | |
223 | ||
224 | config PPC_DCR | |
225 | bool | |
226 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
227 | default y | |
228 | ||
4c9d2800 BH |
229 | config PPC_OF_PLATFORM_PCI |
230 | bool | |
373a6da1 | 231 | depends on PCI |
4c9d2800 BH |
232 | depends on PPC64 # not supported on 32 bits yet |
233 | default n | |
234 | ||
6a11f75b AM |
235 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
236 | def_bool y | |
237 | ||
172ae2e7 DK |
238 | config PPC_ADV_DEBUG_REGS |
239 | bool | |
240 | depends on 40x || BOOKE | |
241 | default y | |
242 | ||
243 | config PPC_ADV_DEBUG_IACS | |
244 | int | |
245 | depends on PPC_ADV_DEBUG_REGS | |
246 | default 4 if 44x | |
247 | default 2 | |
248 | ||
249 | config PPC_ADV_DEBUG_DACS | |
250 | int | |
251 | depends on PPC_ADV_DEBUG_REGS | |
252 | default 2 | |
253 | ||
254 | config PPC_ADV_DEBUG_DVCS | |
255 | int | |
256 | depends on PPC_ADV_DEBUG_REGS | |
257 | default 2 if 44x | |
258 | default 0 | |
259 | ||
260 | config PPC_ADV_DEBUG_DAC_RANGE | |
261 | bool | |
262 | depends on PPC_ADV_DEBUG_REGS && 44x | |
263 | default y | |
264 | ||
14cf11af PM |
265 | source "init/Kconfig" |
266 | ||
dc52ddc0 MH |
267 | source "kernel/Kconfig.freezer" |
268 | ||
a2d2e1ec | 269 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 270 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 271 | |
14cf11af PM |
272 | menu "Kernel options" |
273 | ||
274 | config HIGHMEM | |
275 | bool "High memory support" | |
276 | depends on PPC32 | |
277 | ||
1ad74998 | 278 | source kernel/time/Kconfig |
14cf11af PM |
279 | source kernel/Kconfig.hz |
280 | source kernel/Kconfig.preempt | |
281 | source "fs/Kconfig.binfmt" | |
282 | ||
ba72cb8c MG |
283 | config HUGETLB_PAGE_SIZE_VARIABLE |
284 | bool | |
285 | depends on HUGETLB_PAGE | |
286 | default y | |
287 | ||
14cf11af PM |
288 | config MATH_EMULATION |
289 | bool "Math emulation" | |
4d52719a | 290 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
291 | ---help--- |
292 | Some PowerPC chips designed for embedded applications do not have | |
293 | a floating-point unit and therefore do not implement the | |
294 | floating-point instructions in the PowerPC instruction set. If you | |
295 | say Y here, the kernel will include code to emulate a floating-point | |
296 | unit, which will allow programs that use floating-point | |
297 | instructions to run. | |
298 | ||
5dd57a13 SW |
299 | config 8XX_MINIMAL_FPEMU |
300 | bool "Minimal math emulation for 8xx" | |
301 | depends on 8xx && !MATH_EMULATION | |
302 | help | |
303 | Older arch/ppc kernels still emulated a few floating point | |
304 | instructions such as load and store, even when full math | |
305 | emulation is disabled. Say "Y" here if you want to preserve | |
306 | this behavior. | |
307 | ||
308 | It is recommended that you build a soft-float userspace instead. | |
309 | ||
fb3475e9 FT |
310 | config IOMMU_HELPER |
311 | def_bool PPC64 | |
312 | ||
ec3cf2ec BB |
313 | config SWIOTLB |
314 | bool "SWIOTLB support" | |
315 | default n | |
316 | select IOMMU_HELPER | |
317 | ---help--- | |
318 | Support for IO bounce buffering for systems without an IOMMU. | |
319 | This allows us to DMA to the full physical address space on | |
320 | platforms where the size of a physical address is larger | |
321 | than the bus address. Not all platforms support this. | |
322 | ||
14cf11af PM |
323 | config HOTPLUG_CPU |
324 | bool "Support for enabling/disabling CPUs" | |
325 | depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC) | |
326 | ---help--- | |
327 | Say Y here to be able to disable and re-enable individual | |
328 | CPUs at runtime on SMP machines. | |
329 | ||
330 | Say N if you are unsure. | |
331 | ||
12633e80 NF |
332 | config ARCH_CPU_PROBE_RELEASE |
333 | def_bool y | |
334 | depends on HOTPLUG_CPU | |
335 | ||
cc57637b YG |
336 | config ARCH_ENABLE_MEMORY_HOTPLUG |
337 | def_bool y | |
338 | ||
a99824f3 BP |
339 | config ARCH_HAS_WALK_MEMORY |
340 | def_bool y | |
341 | ||
1482471d BP |
342 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
343 | def_bool y | |
344 | ||
14cf11af PM |
345 | config KEXEC |
346 | bool "kexec system call (EXPERIMENTAL)" | |
f933a41e | 347 | depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL |
14cf11af PM |
348 | help |
349 | kexec is a system call that implements the ability to shutdown your | |
350 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 351 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
352 | you can start any kernel with it, not just Linux. |
353 | ||
1f1332f7 | 354 | The name comes from the similarity to the exec system call. |
14cf11af PM |
355 | |
356 | It is an ongoing process to be certain the hardware in a machine | |
357 | is properly shutdown, so do not be surprised if this code does not | |
358 | initially work for you. It may help to enable device hotplugging | |
359 | support. As of this writing the exact hardware interface is | |
360 | strongly in flux, so no good recommendation can be made. | |
361 | ||
e8625d46 | 362 | config CRASH_DUMP |
3420b5da | 363 | bool "Build a kdump crash kernel" |
f933a41e MM |
364 | depends on PPC64 || 6xx || FSL_BOOKE |
365 | select RELOCATABLE if PPC64 || FSL_BOOKE | |
e8625d46 HM |
366 | help |
367 | Build a kernel suitable for use as a kdump capture kernel. | |
54622f10 MK |
368 | The same kernel binary can be used as production kernel and dump |
369 | capture kernel. | |
e8625d46 | 370 | |
242f271c MA |
371 | config PHYP_DUMP |
372 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" | |
373 | depends on PPC_PSERIES && EXPERIMENTAL | |
374 | help | |
375 | Hypervisor-assisted dump is meant to be a kdump replacement | |
376 | offering robustness and speed not possible without system | |
692105b8 | 377 | hypervisor assistance. |
242f271c MA |
378 | |
379 | If unsure, say "N" | |
380 | ||
14cf11af PM |
381 | config PPCBUG_NVRAM |
382 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
383 | default y if PPC_PREP | |
384 | ||
385 | config IRQ_ALL_CPUS | |
386 | bool "Distribute interrupts on all CPUs by default" | |
387 | depends on SMP && !MV64360 | |
388 | help | |
389 | This option gives the kernel permission to distribute IRQs across | |
390 | multiple CPUs. Saying N here will route all IRQs to the first | |
391 | CPU. Generally saying Y is safe, although some problems have been | |
392 | reported with SMP Power Macintoshes with this option enabled. | |
393 | ||
cd015707 ME |
394 | config SPARSE_IRQ |
395 | bool "Support sparse irq numbering" | |
9ce91685 | 396 | default n |
cd015707 ME |
397 | help |
398 | This enables support for sparse irqs. This is useful for distro | |
399 | kernels that want to define a high CONFIG_NR_CPUS value but still | |
400 | want to have low kernel memory footprint on smaller machines. | |
401 | ||
402 | ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread | |
403 | out the irq_desc[] array in a more NUMA-friendly way. ) | |
404 | ||
9ce91685 | 405 | If you don't know what to do here, say N. |
cd015707 | 406 | |
ffa27b6b AW |
407 | config NUMA |
408 | bool "NUMA support" | |
409 | depends on PPC64 | |
410 | default y if SMP && PPC_PSERIES | |
411 | ||
c80d79d7 YG |
412 | config NODES_SHIFT |
413 | int | |
ea55bf29 | 414 | default "8" if PPC64 |
c80d79d7 YG |
415 | default "4" |
416 | depends on NEED_MULTIPLE_NODES | |
417 | ||
ea55bf29 AB |
418 | config MAX_ACTIVE_REGIONS |
419 | int | |
420 | default "256" if PPC64 | |
421 | default "32" | |
422 | ||
14cf11af PM |
423 | config ARCH_SELECT_MEMORY_MODEL |
424 | def_bool y | |
425 | depends on PPC64 | |
426 | ||
427 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
428 | def_bool y |
429 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 430 | |
45fb6cea | 431 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 432 | def_bool y |
9100b205 | 433 | depends on PPC64 |
d29eff7b | 434 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 435 | |
45fb6cea | 436 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 437 | def_bool y |
78bde53e | 438 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 439 | |
c67c3cb4 | 440 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 441 | def_bool y |
c67c3cb4 | 442 | |
5a1eb5c4 BH |
443 | config SYS_SUPPORTS_HUGETLBFS |
444 | def_bool y | |
445 | depends on PPC_BOOK3S_64 | |
446 | ||
c67c3cb4 | 447 | source "mm/Kconfig" |
14cf11af | 448 | |
7e9191da MK |
449 | config ARCH_MEMORY_PROBE |
450 | def_bool y | |
451 | depends on MEMORY_HOTPLUG | |
452 | ||
75167957 AW |
453 | # Some NUMA nodes have memory ranges that span |
454 | # other nodes. Even though a pfn is valid and | |
455 | # between a node's start and end pfns, it may not | |
456 | # reside on that node. See memmap_init_zone() | |
457 | # for details. | |
458 | config NODES_SPAN_OTHER_NODES | |
459 | def_bool y | |
460 | depends on NEED_MULTIPLE_NODES | |
461 | ||
16c2d476 BH |
462 | config PPC_HAS_HASH_64K |
463 | bool | |
464 | depends on PPC64 | |
465 | default n | |
466 | ||
e1240122 YT |
467 | config STDBINUTILS |
468 | bool "Using standard binutils settings" | |
469 | depends on 44x | |
470 | default y | |
471 | help | |
472 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
473 | Note, that kernel will be able to run only those applications, | |
474 | which had been compiled using binutils later than 2.17.50.0.3 with | |
475 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
476 | the older binutils, you can patch them with a trivial patch, which | |
477 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
478 | ||
ca9153a3 IY |
479 | choice |
480 | prompt "Page size" | |
481 | default PPC_4K_PAGES | |
3c726f8d | 482 | help |
ca9153a3 IY |
483 | Select the kernel logical page size. Increasing the page size |
484 | will reduce software overhead at each page boundary, allow | |
485 | hardware prefetch mechanisms to be more effective, and allow | |
486 | larger dma transfers increasing IO efficiency and reducing | |
487 | overhead. However the utilization of memory will increase. | |
488 | For example, each cached file will using a multiple of the | |
489 | page size to hold its contents and the difference between the | |
490 | end of file and the end of page is wasted. | |
491 | ||
492 | Some dedicated systems, such as software raid serving with | |
493 | accelerated calculations, have shown significant increases. | |
494 | ||
495 | If you configure a 64 bit kernel for 64k pages but the | |
496 | processor does not support them, then the kernel will simulate | |
497 | them with 4k pages, loading them on demand, but with the | |
498 | reduced software overhead and larger internal fragmentation. | |
499 | For the 32 bit kernel, a large page option will not be offered | |
500 | unless it is supported by the configured processor. | |
501 | ||
502 | If unsure, choose 4K_PAGES. | |
503 | ||
504 | config PPC_4K_PAGES | |
505 | bool "4k page size" | |
506 | ||
507 | config PPC_16K_PAGES | |
508 | bool "16k page size" if 44x | |
509 | ||
510 | config PPC_64K_PAGES | |
2d27cfd3 | 511 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
ca9153a3 IY |
512 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
513 | ||
e1240122 YT |
514 | config PPC_256K_PAGES |
515 | bool "256k page size" if 44x | |
adf213c4 | 516 | depends on !STDBINUTILS |
e1240122 YT |
517 | help |
518 | Make the page size 256k. | |
519 | ||
520 | As the ELF standard only requires alignment to support page | |
521 | sizes up to 64k, you will need to compile all of your user | |
522 | space applications with a non-standard binutils settings | |
523 | (see the STDBINUTILS description for details). | |
524 | ||
525 | Say N unless you know what you are doing. | |
526 | ||
ca9153a3 | 527 | endchoice |
3c726f8d | 528 | |
53bcddb9 SR |
529 | config FORCE_MAX_ZONEORDER |
530 | int "Maximum zone order" | |
066c4b87 BH |
531 | range 9 64 if PPC64 && PPC_64K_PAGES |
532 | default "9" if PPC64 && PPC_64K_PAGES | |
533 | range 13 64 if PPC64 && !PPC_64K_PAGES | |
534 | default "13" if PPC64 && !PPC_64K_PAGES | |
535 | range 9 64 if PPC32 && PPC_16K_PAGES | |
536 | default "9" if PPC32 && PPC_16K_PAGES | |
537 | range 7 64 if PPC32 && PPC_64K_PAGES | |
538 | default "7" if PPC32 && PPC_64K_PAGES | |
539 | range 5 64 if PPC32 && PPC_256K_PAGES | |
540 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 541 | range 11 64 |
53bcddb9 SR |
542 | default "11" |
543 | help | |
544 | The kernel memory allocator divides physically contiguous memory | |
545 | blocks into "zones", where each zone is a power of two number of | |
546 | pages. This option selects the largest power of two that the kernel | |
547 | keeps in the memory allocator. If you need to allocate very large | |
548 | blocks of physically contiguous memory, then you may need to | |
549 | increase this value. | |
550 | ||
551 | This config option is actually maximum order plus one. For example, | |
552 | a value of 11 means that the largest free memory block is 2^10 pages. | |
553 | ||
554 | The page size is not necessarily 4KB. For example, on 64-bit | |
555 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
556 | this in mind when choosing a value for this option. | |
557 | ||
fa28237c PM |
558 | config PPC_SUBPAGE_PROT |
559 | bool "Support setting protections for 4k subpages" | |
ca9153a3 | 560 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
fa28237c PM |
561 | help |
562 | This option adds support for a system call to allow user programs | |
563 | to set access permissions (read/write, readonly, or no access) | |
564 | on the 4k subpages of each 64k page. | |
565 | ||
14cf11af PM |
566 | config SCHED_SMT |
567 | bool "SMT (Hyperthreading) scheduler support" | |
568 | depends on PPC64 && SMP | |
14cf11af PM |
569 | help |
570 | SMT scheduler support improves the CPU scheduler's decision making | |
571 | when dealing with POWER5 cpus at a cost of slightly increased | |
572 | overhead in some places. If unsure say N here. | |
573 | ||
14cf11af PM |
574 | config CMDLINE_BOOL |
575 | bool "Default bootloader kernel arguments" | |
14cf11af PM |
576 | |
577 | config CMDLINE | |
578 | string "Initial kernel command string" | |
579 | depends on CMDLINE_BOOL | |
580 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
581 | help | |
582 | On some platforms, there is currently no way for the boot loader to | |
583 | pass arguments to the kernel. For these platforms, you can supply | |
584 | some command-line options at build time by entering them here. In | |
585 | most cases you will need to specify the root device here. | |
586 | ||
c356aa45 GL |
587 | config EXTRA_TARGETS |
588 | string "Additional default image types" | |
589 | help | |
590 | List additional targets to be built by the bootwrapper here (separated | |
591 | by spaces). This is useful for targets that depend of device tree | |
592 | files in the .dts directory. | |
593 | ||
594 | Targets in this list will be build as part of the default build | |
595 | target, or when the user does a 'make zImage' or a | |
596 | 'make zImage.initrd'. | |
597 | ||
598 | If unsure, leave blank | |
599 | ||
14cf11af | 600 | if !44x || BROKEN |
b28f5081 JB |
601 | config ARCH_WANTS_FREEZER_CONTROL |
602 | def_bool y | |
603 | depends on ADB_PMU | |
604 | ||
14cf11af PM |
605 | source kernel/power/Kconfig |
606 | endif | |
607 | ||
608 | config SECCOMP | |
609 | bool "Enable seccomp to safely compute untrusted bytecode" | |
610 | depends on PROC_FS | |
611 | default y | |
612 | help | |
613 | This kernel feature is useful for number crunching applications | |
614 | that may need to compute untrusted bytecode during their | |
615 | execution. By using pipes or other transports made available to | |
616 | the process as file descriptors supporting the read/write | |
617 | syscalls, it's possible to isolate those applications in | |
618 | their own address space using seccomp. Once seccomp is | |
619 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
620 | and the task is only allowed to execute a few safe syscalls | |
621 | defined by each seccomp mode. | |
622 | ||
623 | If unsure, say Y. Only embedded should say N here. | |
624 | ||
625 | endmenu | |
626 | ||
627 | config ISA_DMA_API | |
628 | bool | |
373a6da1 | 629 | default !PPC_ISERIES || PCI |
14cf11af PM |
630 | |
631 | menu "Bus options" | |
632 | ||
633 | config ISA | |
634 | bool "Support for ISA-bus hardware" | |
635 | depends on PPC_PREP || PPC_CHRP | |
f9bd170a | 636 | select PPC_I8259 |
14cf11af PM |
637 | help |
638 | Find out whether you have ISA slots on your motherboard. ISA is the | |
639 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
640 | inside your box. If you have an Apple machine, say N here; if you | |
641 | have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If | |
642 | you have an embedded board, consult your board documentation. | |
643 | ||
5ac6da66 CL |
644 | config ZONE_DMA |
645 | bool | |
646 | default y | |
647 | ||
af407c6d FT |
648 | config NEED_DMA_MAP_STATE |
649 | def_bool (PPC64 || NOT_COHERENT_CACHE) | |
650 | ||
e32205eb FT |
651 | config NEED_SG_DMA_LENGTH |
652 | def_bool y | |
653 | ||
14cf11af PM |
654 | config GENERIC_ISA_DMA |
655 | bool | |
1927445a | 656 | depends on ISA_DMA_API |
14cf11af PM |
657 | default y |
658 | ||
25635c71 PM |
659 | config PPC_INDIRECT_PCI |
660 | bool | |
661 | depends on PCI | |
63dafe57 | 662 | default y if 40x || 44x |
25635c71 PM |
663 | default n |
664 | ||
14cf11af PM |
665 | config EISA |
666 | bool | |
667 | ||
668 | config SBUS | |
669 | bool | |
670 | ||
08264cbc KG |
671 | config FSL_SOC |
672 | bool | |
673 | ||
55c44991 RZ |
674 | config FSL_PCI |
675 | bool | |
676 | select PPC_INDIRECT_PCI | |
d0839118 | 677 | select PCI_QUIRKS |
55c44991 | 678 | |
4ffd6952 AV |
679 | config FSL_PMC |
680 | bool | |
681 | default y | |
682 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
683 | help | |
684 | Freescale MPC85xx/MPC86xx power management controller support | |
685 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
686 | ||
2a706919 SR |
687 | config 4xx_SOC |
688 | bool | |
689 | ||
acaa7aa3 AV |
690 | config FSL_LBC |
691 | bool | |
692 | help | |
693 | Freescale Localbus support | |
694 | ||
83ff9dcf AV |
695 | config FSL_GTM |
696 | bool | |
697 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
698 | help | |
699 | Freescale General-purpose Timers support | |
700 | ||
14cf11af PM |
701 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
702 | config MCA | |
703 | bool | |
704 | ||
b500563b JR |
705 | # Platforms that what PCI turned unconditionally just do select PCI |
706 | # in their config node. Platforms that want to choose at config | |
707 | # time should select PPC_PCI_CHOICE | |
708 | config PPC_PCI_CHOICE | |
709 | bool | |
710 | ||
14cf11af | 711 | config PCI |
b500563b JR |
712 | bool "PCI support" if PPC_PCI_CHOICE |
713 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
bcc48591 | 714 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
f21f49ea | 715 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 716 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 717 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
718 | help |
719 | Find out whether your system includes a PCI bus. PCI is the name of | |
720 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
721 | your box. If you say Y here, the kernel will include drivers and | |
722 | infrastructure code to support PCI bus devices. | |
723 | ||
724 | config PCI_DOMAINS | |
36e23590 MW |
725 | def_bool PCI |
726 | ||
727 | config PCI_SYSCALL | |
728 | def_bool PCI | |
14cf11af | 729 | |
14cf11af PM |
730 | config PCI_QSPAN |
731 | bool "QSpan PCI" | |
732 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 733 | select PPC_I8259 |
14cf11af PM |
734 | help |
735 | Say Y here if you have a system based on a Motorola 8xx-series | |
736 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
737 | ||
738 | config PCI_8260 | |
739 | bool | |
740 | depends on PCI && 8260 | |
25635c71 | 741 | select PPC_INDIRECT_PCI |
14cf11af PM |
742 | default y |
743 | ||
744 | config 8260_PCI9 | |
4a3ecc62 | 745 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 746 | depends on PCI_8260 && !8272 |
14cf11af PM |
747 | default y |
748 | ||
749 | choice | |
4a3ecc62 | 750 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
751 | depends on 8260_PCI9 |
752 | ||
753 | config 8260_PCI9_IDMA1 | |
754 | bool "IDMA1" | |
755 | ||
756 | config 8260_PCI9_IDMA2 | |
757 | bool "IDMA2" | |
758 | ||
759 | config 8260_PCI9_IDMA3 | |
760 | bool "IDMA3" | |
761 | ||
762 | config 8260_PCI9_IDMA4 | |
763 | bool "IDMA4" | |
764 | ||
765 | endchoice | |
766 | ||
bb53bb3d JM |
767 | source "drivers/pci/pcie/Kconfig" |
768 | ||
14cf11af PM |
769 | source "drivers/pci/Kconfig" |
770 | ||
771 | source "drivers/pcmcia/Kconfig" | |
772 | ||
773 | source "drivers/pci/hotplug/Kconfig" | |
774 | ||
f1f389d5 ZW |
775 | config HAS_RAPIDIO |
776 | bool | |
777 | default n | |
778 | ||
779 | config RAPIDIO | |
780 | bool "RapidIO support" | |
781 | depends on HAS_RAPIDIO | |
782 | help | |
783 | If you say Y here, the kernel will include drivers and | |
784 | infrastructure code to support RapidIO interconnect devices. | |
785 | ||
786 | source "drivers/rapidio/Kconfig" | |
787 | ||
14cf11af PM |
788 | endmenu |
789 | ||
790 | menu "Advanced setup" | |
791 | depends on PPC32 | |
792 | ||
793 | config ADVANCED_OPTIONS | |
794 | bool "Prompt for advanced kernel configuration options" | |
795 | help | |
796 | This option will enable prompting for a variety of advanced kernel | |
797 | configuration options. These options can cause the kernel to not | |
798 | work if they are set incorrectly, but can be used to optimize certain | |
799 | aspects of kernel memory management. | |
800 | ||
801 | Unless you know what you are doing, say N here. | |
802 | ||
803 | comment "Default settings for advanced configuration options are used" | |
804 | depends on !ADVANCED_OPTIONS | |
805 | ||
14cf11af PM |
806 | config LOWMEM_SIZE_BOOL |
807 | bool "Set maximum low memory" | |
808 | depends on ADVANCED_OPTIONS | |
809 | help | |
810 | This option allows you to set the maximum amount of memory which | |
811 | will be used as "low memory", that is, memory which the kernel can | |
812 | access directly, without having to set up a kernel virtual mapping. | |
813 | This can be useful in optimizing the layout of kernel virtual | |
814 | memory. | |
815 | ||
816 | Say N here unless you know what you are doing. | |
817 | ||
818 | config LOWMEM_SIZE | |
819 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
820 | default "0x30000000" | |
821 | ||
96051465 TP |
822 | config LOWMEM_CAM_NUM_BOOL |
823 | bool "Set number of CAMs to use to map low memory" | |
824 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
825 | help | |
826 | This option allows you to set the maximum number of CAM slots that | |
827 | will be used to map low memory. There are a limited number of slots | |
828 | available and even more limited number that will fit in the L1 MMU. | |
829 | However, using more entries will allow mapping more low memory. This | |
830 | can be useful in optimizing the layout of kernel virtual memory. | |
831 | ||
832 | Say N here unless you know what you are doing. | |
833 | ||
834 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 835 | depends on FSL_BOOKE |
96051465 TP |
836 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
837 | default 3 | |
838 | ||
37dd2bad KG |
839 | config RELOCATABLE |
840 | bool "Build a relocatable kernel (EXPERIMENTAL)" | |
841 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
842 | help | |
843 | This builds a kernel image that is capable of running at the | |
844 | location the kernel is loaded at (some alignment restrictions may | |
845 | exist). | |
846 | ||
847 | One use is for the kexec on panic case where the recovery kernel | |
848 | must live at a different physical address than the primary | |
849 | kernel. | |
850 | ||
851 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
852 | it has been loaded at and the compile time physical addresses | |
853 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
854 | setting can still be useful to bootwrappers that need to know the | |
855 | load location of the kernel (eg. u-boot/mkimage). | |
856 | ||
857 | config PAGE_OFFSET_BOOL | |
858 | bool "Set custom page offset address" | |
859 | depends on ADVANCED_OPTIONS | |
860 | help | |
861 | This option allows you to set the kernel virtual address at which | |
862 | the kernel will map low memory. This can be useful in optimizing | |
863 | the virtual memory layout of the system. | |
864 | ||
865 | Say N here unless you know what you are doing. | |
866 | ||
867 | config PAGE_OFFSET | |
868 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
869 | default "0xc0000000" | |
870 | ||
14cf11af PM |
871 | config KERNEL_START_BOOL |
872 | bool "Set custom kernel base address" | |
873 | depends on ADVANCED_OPTIONS | |
874 | help | |
875 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
876 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
877 | however there are times (like kdump) that one might not want them | |
878 | to be the same. | |
14cf11af PM |
879 | |
880 | Say N here unless you know what you are doing. | |
881 | ||
882 | config KERNEL_START | |
883 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad | 884 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
f933a41e | 885 | default "0xc2000000" if CRASH_DUMP && !RELOCATABLE |
14cf11af PM |
886 | default "0xc0000000" |
887 | ||
37dd2bad KG |
888 | config PHYSICAL_START_BOOL |
889 | bool "Set physical address where the kernel is loaded" | |
890 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
891 | help | |
892 | This gives the physical address where the kernel is loaded. | |
893 | ||
894 | Say N here unless you know what you are doing. | |
895 | ||
896 | config PHYSICAL_START | |
897 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
f933a41e | 898 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE |
37dd2bad KG |
899 | default "0x00000000" |
900 | ||
901 | config PHYSICAL_ALIGN | |
902 | hex | |
c8f3570b | 903 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
904 | help |
905 | This value puts the alignment restrictions on physical address | |
906 | where kernel is loaded and run from. Kernel is compiled for an | |
907 | address which meets above alignment restriction. | |
908 | ||
14cf11af PM |
909 | config TASK_SIZE_BOOL |
910 | bool "Set custom user task size" | |
911 | depends on ADVANCED_OPTIONS | |
912 | help | |
913 | This option allows you to set the amount of virtual address space | |
914 | allocated to user tasks. This can be useful in optimizing the | |
915 | virtual memory layout of the system. | |
916 | ||
917 | Say N here unless you know what you are doing. | |
918 | ||
919 | config TASK_SIZE | |
920 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
921 | default "0x80000000" if PPC_PREP || PPC_8xx |
922 | default "0xc0000000" | |
14cf11af | 923 | |
84532a0f BH |
924 | config CONSISTENT_SIZE_BOOL |
925 | bool "Set custom consistent memory pool size" | |
926 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
927 | help | |
928 | This option allows you to set the size of the | |
929 | consistent memory pool. This pool of virtual memory | |
930 | is used to make consistent memory allocations. | |
931 | ||
932 | config CONSISTENT_SIZE | |
933 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
934 | default "0x00200000" if NOT_COHERENT_CACHE | |
935 | ||
14cf11af PM |
936 | config PIN_TLB |
937 | bool "Pinned Kernel TLBs (860 ONLY)" | |
938 | depends on ADVANCED_OPTIONS && 8xx | |
939 | endmenu | |
940 | ||
cabb5587 | 941 | if PPC64 |
549e8152 PM |
942 | config RELOCATABLE |
943 | bool "Build a relocatable kernel" | |
944 | help | |
945 | This builds a kernel image that is capable of running anywhere | |
946 | in the RMA (real memory area) at any 16k-aligned base address. | |
947 | The kernel is linked as a position-independent executable (PIE) | |
948 | and contains dynamic relocations which are processed early | |
949 | in the bootup process. | |
950 | ||
951 | One use is for the kexec on panic case where the recovery kernel | |
952 | must live at a different physical address than the primary | |
953 | kernel. | |
954 | ||
37dd2bad KG |
955 | config PAGE_OFFSET |
956 | hex | |
957 | default "0xc000000000000000" | |
cabb5587 SR |
958 | config KERNEL_START |
959 | hex | |
eeb2d218 | 960 | default "0xc000000000000000" |
37dd2bad KG |
961 | config PHYSICAL_START |
962 | hex | |
37dd2bad | 963 | default "0x00000000" |
cabb5587 SR |
964 | endif |
965 | ||
14cf11af PM |
966 | source "net/Kconfig" |
967 | ||
968 | source "drivers/Kconfig" | |
969 | ||
970 | source "fs/Kconfig" | |
971 | ||
98658538 LY |
972 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
973 | ||
14cf11af PM |
974 | source "lib/Kconfig" |
975 | ||
14cf11af PM |
976 | source "arch/powerpc/Kconfig.debug" |
977 | ||
978 | source "security/Kconfig" | |
979 | ||
980 | config KEYS_COMPAT | |
981 | bool | |
982 | depends on COMPAT && KEYS | |
983 | default y | |
984 | ||
985 | source "crypto/Kconfig" | |
6f668280 DP |
986 | |
987 | config PPC_CLOCK | |
988 | bool | |
989 | default n | |
9483a578 | 990 | select HAVE_CLK |
1088a209 SM |
991 | |
992 | config PPC_LIB_RHEAP | |
993 | bool | |
994 | ||
bbf45ba5 | 995 | source "arch/powerpc/kvm/Kconfig" |