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14cf11af PM |
1 | # For a description of the syntax of this configuration file, |
2 | # see Documentation/kbuild/kconfig-language.txt. | |
3 | # | |
4 | ||
5 | mainmenu "Linux/PowerPC Kernel Configuration" | |
6 | ||
a0ae9c7c | 7 | source "arch/powerpc/platforms/Kconfig.cputype" |
17e638bc | 8 | |
14cf11af PM |
9 | config PPC32 |
10 | bool | |
11 | default y if !PPC64 | |
12 | ||
13 | config 64BIT | |
14 | bool | |
15 | default y if PPC64 | |
16 | ||
2578bfae SR |
17 | config WORD_SIZE |
18 | int | |
19 | default 64 if PPC64 | |
20 | default 32 if !PPC64 | |
21 | ||
600715dc JF |
22 | config ARCH_PHYS_ADDR_T_64BIT |
23 | def_bool PPC64 || PHYS_64BIT | |
24 | ||
14cf11af PM |
25 | config MMU |
26 | bool | |
27 | default y | |
28 | ||
aa3be5f3 TB |
29 | config GENERIC_CMOS_UPDATE |
30 | def_bool y | |
31 | ||
4a4cfe38 TB |
32 | config GENERIC_TIME |
33 | def_bool y | |
34 | ||
35 | config GENERIC_TIME_VSYSCALL | |
36 | def_bool y | |
37 | ||
d831d0b8 TB |
38 | config GENERIC_CLOCKEVENTS |
39 | def_bool y | |
40 | ||
14cf11af PM |
41 | config GENERIC_HARDIRQS |
42 | bool | |
43 | default y | |
44 | ||
8e27f4da ME |
45 | config GENERIC_HARDIRQS_NO__DO_IRQ |
46 | bool | |
47 | default y | |
48 | ||
c2a7e818 | 49 | config HAVE_SETUP_PER_CPU_AREA |
e74e3962 TH |
50 | def_bool PPC64 |
51 | ||
c2a7e818 | 52 | config NEED_PER_CPU_EMBED_FIRST_CHUNK |
b32ef636 | 53 | def_bool PPC64 |
54 | ||
0d7012a9 IM |
55 | config IRQ_PER_CPU |
56 | bool | |
57 | default y | |
58 | ||
551b81f2 ME |
59 | config NR_IRQS |
60 | int "Number of virtual interrupt numbers" | |
61 | range 32 512 | |
62 | default "512" | |
63 | help | |
64 | This defines the number of virtual interrupt numbers the kernel | |
65 | can manage. Virtual interrupt numbers are what you see in | |
66 | /proc/interrupts. If you configure your system to have too few, | |
67 | drivers will fail to load or worse - handle with care. | |
68 | ||
fd3e0bbc CH |
69 | config STACKTRACE_SUPPORT |
70 | bool | |
71 | default y | |
72 | ||
01f4b8b8 AB |
73 | config HAVE_LATENCYTOP_SUPPORT |
74 | def_bool y | |
75 | ||
945feb17 BH |
76 | config TRACE_IRQFLAGS_SUPPORT |
77 | bool | |
945feb17 BH |
78 | default y |
79 | ||
80 | config LOCKDEP_SUPPORT | |
81 | bool | |
82 | default y | |
83 | ||
14cf11af PM |
84 | config RWSEM_GENERIC_SPINLOCK |
85 | bool | |
86 | ||
87 | config RWSEM_XCHGADD_ALGORITHM | |
88 | bool | |
89 | default y | |
90 | ||
95c354fe NP |
91 | config GENERIC_LOCKBREAK |
92 | bool | |
93 | default y | |
94 | depends on SMP && PREEMPT | |
95 | ||
f0d1b0b3 DH |
96 | config ARCH_HAS_ILOG2_U32 |
97 | bool | |
ef55d53c | 98 | default y |
f0d1b0b3 DH |
99 | |
100 | config ARCH_HAS_ILOG2_U64 | |
101 | bool | |
ef55d53c | 102 | default y if 64BIT |
f0d1b0b3 | 103 | |
e779b2f9 AM |
104 | config GENERIC_HWEIGHT |
105 | bool | |
106 | default y | |
107 | ||
0a9cb46a JM |
108 | config GENERIC_FIND_NEXT_BIT |
109 | bool | |
110 | default y | |
111 | ||
b7ce3415 AV |
112 | config GENERIC_GPIO |
113 | bool | |
114 | help | |
115 | Generic GPIO API support | |
116 | ||
f057eac0 SR |
117 | config ARCH_NO_VIRT_TO_BUS |
118 | def_bool PPC64 | |
119 | ||
14cf11af PM |
120 | config PPC |
121 | bool | |
122 | default y | |
2b79d696 SR |
123 | select HAVE_FTRACE_MCOUNT_RECORD |
124 | select HAVE_DYNAMIC_FTRACE | |
606576ce | 125 | select HAVE_FUNCTION_TRACER |
60ce8f72 | 126 | select HAVE_FUNCTION_GRAPH_TRACER |
7444a72e | 127 | select ARCH_WANT_OPTIONAL_GPIOLIB |
ec7748b5 | 128 | select HAVE_IDE |
a1f242ff | 129 | select HAVE_IOREMAP_PROT |
58340a07 | 130 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
3f550096 | 131 | select HAVE_KPROBES |
17ce452f | 132 | select HAVE_ARCH_KGDB |
9edddaa2 | 133 | select HAVE_KRETPROBES |
dec2b0d0 | 134 | select HAVE_ARCH_TRACEHOOK |
d9b2b2a2 | 135 | select HAVE_LMB |
46bab4e4 | 136 | select HAVE_DMA_ATTRS |
80d3e8ab | 137 | select HAVE_DMA_API_DEBUG |
b7d7a240 | 138 | select USE_GENERIC_SMP_HELPERS if SMP |
4e491d14 | 139 | select HAVE_OPROFILE |
ee6a0932 | 140 | select HAVE_SYSCALL_WRAPPERS if PPC64 |
c2e95c6d | 141 | select GENERIC_ATOMIC64 if PPC32 |
cdd6c482 | 142 | select HAVE_PERF_EVENTS |
14cf11af PM |
143 | |
144 | config EARLY_PRINTK | |
145 | bool | |
51d3082f | 146 | default y |
14cf11af PM |
147 | |
148 | config COMPAT | |
149 | bool | |
150 | default y if PPC64 | |
01e31dba | 151 | select COMPAT_BINFMT_ELF |
14cf11af PM |
152 | |
153 | config SYSVIPC_COMPAT | |
154 | bool | |
155 | depends on COMPAT && SYSVIPC | |
156 | default y | |
157 | ||
158 | # All PPC32s use generic nvram driver through ppc_md | |
159 | config GENERIC_NVRAM | |
160 | bool | |
161 | default y if PPC32 | |
162 | ||
ae1e9130 | 163 | config SCHED_OMIT_FRAME_POINTER |
14cf11af PM |
164 | bool |
165 | default y | |
166 | ||
167 | config ARCH_MAY_HAVE_PC_FDC | |
168 | bool | |
bed59275 | 169 | default !PPC_PSERIES || PCI |
14cf11af | 170 | |
08264cbc KG |
171 | config PPC_OF |
172 | def_bool y | |
173 | ||
97e873e5 SR |
174 | config OF |
175 | def_bool y | |
176 | ||
08264cbc KG |
177 | config PPC_UDBG_16550 |
178 | bool | |
179 | default n | |
180 | ||
08264cbc KG |
181 | config GENERIC_TBSYNC |
182 | bool | |
183 | default y if PPC32 && SMP | |
184 | default n | |
185 | ||
e65e1fc2 AV |
186 | config AUDIT_ARCH |
187 | bool | |
188 | default y | |
189 | ||
73c9ceab JF |
190 | config GENERIC_BUG |
191 | bool | |
192 | default y | |
193 | depends on BUG | |
194 | ||
b3028878 | 195 | config SYS_SUPPORTS_APM_EMULATION |
58da10bb | 196 | default y if PMAC_APM_EMU |
b3028878 JB |
197 | bool |
198 | ||
9fffb55f DG |
199 | config DTC |
200 | bool | |
201 | default y | |
202 | ||
f4fc4a5b KG |
203 | config DEFAULT_UIMAGE |
204 | bool | |
205 | help | |
206 | Used to allow a board to specify it wants a uImage built by default | |
207 | default n | |
208 | ||
b09c1644 SW |
209 | config REDBOOT |
210 | bool | |
211 | ||
801e4062 JB |
212 | config ARCH_HIBERNATION_POSSIBLE |
213 | bool | |
543b9fd3 JB |
214 | default y |
215 | ||
f4cb5700 JB |
216 | config ARCH_SUSPEND_POSSIBLE |
217 | def_bool y | |
4ffd6952 AV |
218 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
219 | PPC_85xx || PPC_86xx | |
f4cb5700 | 220 | |
4c75a6f4 BH |
221 | config PPC_DCR_NATIVE |
222 | bool | |
223 | default n | |
224 | ||
225 | config PPC_DCR_MMIO | |
226 | bool | |
227 | default n | |
228 | ||
229 | config PPC_DCR | |
230 | bool | |
231 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
232 | default y | |
233 | ||
4c9d2800 BH |
234 | config PPC_OF_PLATFORM_PCI |
235 | bool | |
373a6da1 | 236 | depends on PCI |
4c9d2800 BH |
237 | depends on PPC64 # not supported on 32 bits yet |
238 | default n | |
239 | ||
6a11f75b AM |
240 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
241 | def_bool y | |
242 | ||
14cf11af PM |
243 | source "init/Kconfig" |
244 | ||
dc52ddc0 MH |
245 | source "kernel/Kconfig.freezer" |
246 | ||
a2d2e1ec | 247 | source "arch/powerpc/sysdev/Kconfig" |
4330f5da | 248 | source "arch/powerpc/platforms/Kconfig" |
14cf11af | 249 | |
14cf11af PM |
250 | menu "Kernel options" |
251 | ||
252 | config HIGHMEM | |
253 | bool "High memory support" | |
254 | depends on PPC32 | |
255 | ||
1ad74998 | 256 | source kernel/time/Kconfig |
14cf11af PM |
257 | source kernel/Kconfig.hz |
258 | source kernel/Kconfig.preempt | |
259 | source "fs/Kconfig.binfmt" | |
260 | ||
ba72cb8c MG |
261 | config HUGETLB_PAGE_SIZE_VARIABLE |
262 | bool | |
263 | depends on HUGETLB_PAGE | |
264 | default y | |
265 | ||
14cf11af PM |
266 | config MATH_EMULATION |
267 | bool "Math emulation" | |
4d52719a | 268 | depends on 4xx || 8xx || E200 || PPC_MPC832x || E500 |
14cf11af PM |
269 | ---help--- |
270 | Some PowerPC chips designed for embedded applications do not have | |
271 | a floating-point unit and therefore do not implement the | |
272 | floating-point instructions in the PowerPC instruction set. If you | |
273 | say Y here, the kernel will include code to emulate a floating-point | |
274 | unit, which will allow programs that use floating-point | |
275 | instructions to run. | |
276 | ||
5dd57a13 SW |
277 | config 8XX_MINIMAL_FPEMU |
278 | bool "Minimal math emulation for 8xx" | |
279 | depends on 8xx && !MATH_EMULATION | |
280 | help | |
281 | Older arch/ppc kernels still emulated a few floating point | |
282 | instructions such as load and store, even when full math | |
283 | emulation is disabled. Say "Y" here if you want to preserve | |
284 | this behavior. | |
285 | ||
286 | It is recommended that you build a soft-float userspace instead. | |
287 | ||
14cf11af | 288 | config IOMMU_VMERGE |
768cc2d3 LV |
289 | bool "Enable IOMMU virtual merging" |
290 | depends on PPC64 | |
291 | default y | |
14cf11af PM |
292 | help |
293 | Cause IO segments sent to a device for DMA to be merged virtually | |
294 | by the IOMMU when they happen to have been allocated contiguously. | |
295 | This doesn't add pressure to the IOMMU allocator. However, some | |
296 | drivers don't support getting large merged segments coming back | |
768cc2d3 LV |
297 | from *_map_sg(). |
298 | ||
299 | Most drivers don't have this problem; it is safe to say Y here. | |
14cf11af | 300 | |
fb3475e9 FT |
301 | config IOMMU_HELPER |
302 | def_bool PPC64 | |
303 | ||
ec3cf2ec BB |
304 | config SWIOTLB |
305 | bool "SWIOTLB support" | |
306 | default n | |
307 | select IOMMU_HELPER | |
308 | ---help--- | |
309 | Support for IO bounce buffering for systems without an IOMMU. | |
310 | This allows us to DMA to the full physical address space on | |
311 | platforms where the size of a physical address is larger | |
312 | than the bus address. Not all platforms support this. | |
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 | ||
12633e80 NF |
323 | config ARCH_CPU_PROBE_RELEASE |
324 | def_bool y | |
325 | depends on HOTPLUG_CPU | |
326 | ||
cc57637b YG |
327 | config ARCH_ENABLE_MEMORY_HOTPLUG |
328 | def_bool y | |
329 | ||
a99824f3 BP |
330 | config ARCH_HAS_WALK_MEMORY |
331 | def_bool y | |
332 | ||
1482471d BP |
333 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
334 | def_bool y | |
335 | ||
14cf11af PM |
336 | config KEXEC |
337 | bool "kexec system call (EXPERIMENTAL)" | |
cb93d568 | 338 | depends on PPC_BOOK3S && EXPERIMENTAL |
14cf11af PM |
339 | help |
340 | kexec is a system call that implements the ability to shutdown your | |
341 | current kernel, and to start another kernel. It is like a reboot | |
1f1332f7 | 342 | but it is independent of the system firmware. And like a reboot |
14cf11af PM |
343 | you can start any kernel with it, not just Linux. |
344 | ||
1f1332f7 | 345 | The name comes from the similarity to the exec system call. |
14cf11af PM |
346 | |
347 | It is an ongoing process to be certain the hardware in a machine | |
348 | is properly shutdown, so do not be surprised if this code does not | |
349 | initially work for you. It may help to enable device hotplugging | |
350 | support. As of this writing the exact hardware interface is | |
351 | strongly in flux, so no good recommendation can be made. | |
352 | ||
e8625d46 | 353 | config CRASH_DUMP |
3420b5da | 354 | bool "Build a kdump crash kernel" |
c6ac71a1 MK |
355 | depends on PPC64 || 6xx |
356 | select RELOCATABLE if PPC64 | |
e8625d46 HM |
357 | help |
358 | Build a kernel suitable for use as a kdump capture kernel. | |
54622f10 MK |
359 | The same kernel binary can be used as production kernel and dump |
360 | capture kernel. | |
e8625d46 | 361 | |
242f271c MA |
362 | config PHYP_DUMP |
363 | bool "Hypervisor-assisted dump (EXPERIMENTAL)" | |
364 | depends on PPC_PSERIES && EXPERIMENTAL | |
365 | help | |
366 | Hypervisor-assisted dump is meant to be a kdump replacement | |
367 | offering robustness and speed not possible without system | |
692105b8 | 368 | hypervisor assistance. |
242f271c MA |
369 | |
370 | If unsure, say "N" | |
371 | ||
14cf11af PM |
372 | config PPCBUG_NVRAM |
373 | bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC | |
374 | default y if PPC_PREP | |
375 | ||
376 | config IRQ_ALL_CPUS | |
377 | bool "Distribute interrupts on all CPUs by default" | |
378 | depends on SMP && !MV64360 | |
379 | help | |
380 | This option gives the kernel permission to distribute IRQs across | |
381 | multiple CPUs. Saying N here will route all IRQs to the first | |
382 | CPU. Generally saying Y is safe, although some problems have been | |
383 | reported with SMP Power Macintoshes with this option enabled. | |
384 | ||
cd015707 ME |
385 | config SPARSE_IRQ |
386 | bool "Support sparse irq numbering" | |
387 | default y | |
388 | help | |
389 | This enables support for sparse irqs. This is useful for distro | |
390 | kernels that want to define a high CONFIG_NR_CPUS value but still | |
391 | want to have low kernel memory footprint on smaller machines. | |
392 | ||
393 | ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread | |
394 | out the irq_desc[] array in a more NUMA-friendly way. ) | |
395 | ||
396 | If you don't know what to do here, say Y. | |
397 | ||
ffa27b6b AW |
398 | config NUMA |
399 | bool "NUMA support" | |
400 | depends on PPC64 | |
401 | default y if SMP && PPC_PSERIES | |
402 | ||
c80d79d7 YG |
403 | config NODES_SHIFT |
404 | int | |
ea55bf29 | 405 | default "8" if PPC64 |
c80d79d7 YG |
406 | default "4" |
407 | depends on NEED_MULTIPLE_NODES | |
408 | ||
ea55bf29 AB |
409 | config MAX_ACTIVE_REGIONS |
410 | int | |
411 | default "256" if PPC64 | |
412 | default "32" | |
413 | ||
14cf11af PM |
414 | config ARCH_SELECT_MEMORY_MODEL |
415 | def_bool y | |
416 | depends on PPC64 | |
417 | ||
418 | config ARCH_FLATMEM_ENABLE | |
9100b205 AW |
419 | def_bool y |
420 | depends on (PPC64 && !NUMA) || PPC32 | |
14cf11af | 421 | |
45fb6cea | 422 | config ARCH_SPARSEMEM_ENABLE |
14cf11af | 423 | def_bool y |
9100b205 | 424 | depends on PPC64 |
d29eff7b | 425 | select SPARSEMEM_VMEMMAP_ENABLE |
14cf11af | 426 | |
45fb6cea | 427 | config ARCH_SPARSEMEM_DEFAULT |
14cf11af | 428 | def_bool y |
78bde53e | 429 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
14cf11af | 430 | |
c67c3cb4 | 431 | config ARCH_POPULATES_NODE_MAP |
14cf11af | 432 | def_bool y |
c67c3cb4 | 433 | |
5a1eb5c4 BH |
434 | config SYS_SUPPORTS_HUGETLBFS |
435 | def_bool y | |
436 | depends on PPC_BOOK3S_64 | |
437 | ||
c67c3cb4 | 438 | source "mm/Kconfig" |
14cf11af | 439 | |
7e9191da MK |
440 | config ARCH_MEMORY_PROBE |
441 | def_bool y | |
442 | depends on MEMORY_HOTPLUG | |
443 | ||
75167957 AW |
444 | # Some NUMA nodes have memory ranges that span |
445 | # other nodes. Even though a pfn is valid and | |
446 | # between a node's start and end pfns, it may not | |
447 | # reside on that node. See memmap_init_zone() | |
448 | # for details. | |
449 | config NODES_SPAN_OTHER_NODES | |
450 | def_bool y | |
451 | depends on NEED_MULTIPLE_NODES | |
452 | ||
16c2d476 BH |
453 | config PPC_HAS_HASH_64K |
454 | bool | |
455 | depends on PPC64 | |
456 | default n | |
457 | ||
e1240122 YT |
458 | config STDBINUTILS |
459 | bool "Using standard binutils settings" | |
460 | depends on 44x | |
461 | default y | |
462 | help | |
463 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
464 | Note, that kernel will be able to run only those applications, | |
465 | which had been compiled using binutils later than 2.17.50.0.3 with | |
466 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
467 | the older binutils, you can patch them with a trivial patch, which | |
468 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
469 | ||
ca9153a3 IY |
470 | choice |
471 | prompt "Page size" | |
472 | default PPC_4K_PAGES | |
3c726f8d | 473 | help |
ca9153a3 IY |
474 | Select the kernel logical page size. Increasing the page size |
475 | will reduce software overhead at each page boundary, allow | |
476 | hardware prefetch mechanisms to be more effective, and allow | |
477 | larger dma transfers increasing IO efficiency and reducing | |
478 | overhead. However the utilization of memory will increase. | |
479 | For example, each cached file will using a multiple of the | |
480 | page size to hold its contents and the difference between the | |
481 | end of file and the end of page is wasted. | |
482 | ||
483 | Some dedicated systems, such as software raid serving with | |
484 | accelerated calculations, have shown significant increases. | |
485 | ||
486 | If you configure a 64 bit kernel for 64k pages but the | |
487 | processor does not support them, then the kernel will simulate | |
488 | them with 4k pages, loading them on demand, but with the | |
489 | reduced software overhead and larger internal fragmentation. | |
490 | For the 32 bit kernel, a large page option will not be offered | |
491 | unless it is supported by the configured processor. | |
492 | ||
493 | If unsure, choose 4K_PAGES. | |
494 | ||
495 | config PPC_4K_PAGES | |
496 | bool "4k page size" | |
497 | ||
498 | config PPC_16K_PAGES | |
499 | bool "16k page size" if 44x | |
500 | ||
501 | config PPC_64K_PAGES | |
2d27cfd3 | 502 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
ca9153a3 IY |
503 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
504 | ||
e1240122 YT |
505 | config PPC_256K_PAGES |
506 | bool "256k page size" if 44x | |
adf213c4 | 507 | depends on !STDBINUTILS |
e1240122 YT |
508 | help |
509 | Make the page size 256k. | |
510 | ||
511 | As the ELF standard only requires alignment to support page | |
512 | sizes up to 64k, you will need to compile all of your user | |
513 | space applications with a non-standard binutils settings | |
514 | (see the STDBINUTILS description for details). | |
515 | ||
516 | Say N unless you know what you are doing. | |
517 | ||
ca9153a3 | 518 | endchoice |
3c726f8d | 519 | |
53bcddb9 SR |
520 | config FORCE_MAX_ZONEORDER |
521 | int "Maximum zone order" | |
066c4b87 BH |
522 | range 9 64 if PPC64 && PPC_64K_PAGES |
523 | default "9" if PPC64 && PPC_64K_PAGES | |
524 | range 13 64 if PPC64 && !PPC_64K_PAGES | |
525 | default "13" if PPC64 && !PPC_64K_PAGES | |
526 | range 9 64 if PPC32 && PPC_16K_PAGES | |
527 | default "9" if PPC32 && PPC_16K_PAGES | |
528 | range 7 64 if PPC32 && PPC_64K_PAGES | |
529 | default "7" if PPC32 && PPC_64K_PAGES | |
530 | range 5 64 if PPC32 && PPC_256K_PAGES | |
531 | default "5" if PPC32 && PPC_256K_PAGES | |
ebe40c5c | 532 | range 11 64 |
53bcddb9 SR |
533 | default "11" |
534 | help | |
535 | The kernel memory allocator divides physically contiguous memory | |
536 | blocks into "zones", where each zone is a power of two number of | |
537 | pages. This option selects the largest power of two that the kernel | |
538 | keeps in the memory allocator. If you need to allocate very large | |
539 | blocks of physically contiguous memory, then you may need to | |
540 | increase this value. | |
541 | ||
542 | This config option is actually maximum order plus one. For example, | |
543 | a value of 11 means that the largest free memory block is 2^10 pages. | |
544 | ||
545 | The page size is not necessarily 4KB. For example, on 64-bit | |
546 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
547 | this in mind when choosing a value for this option. | |
548 | ||
fa28237c PM |
549 | config PPC_SUBPAGE_PROT |
550 | bool "Support setting protections for 4k subpages" | |
ca9153a3 | 551 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
fa28237c PM |
552 | help |
553 | This option adds support for a system call to allow user programs | |
554 | to set access permissions (read/write, readonly, or no access) | |
555 | on the 4k subpages of each 64k page. | |
556 | ||
14cf11af PM |
557 | config SCHED_SMT |
558 | bool "SMT (Hyperthreading) scheduler support" | |
559 | depends on PPC64 && SMP | |
14cf11af PM |
560 | help |
561 | SMT scheduler support improves the CPU scheduler's decision making | |
562 | when dealing with POWER5 cpus at a cost of slightly increased | |
563 | overhead in some places. If unsure say N here. | |
564 | ||
565 | config PROC_DEVICETREE | |
5f296755 PM |
566 | bool "Support for device tree in /proc" |
567 | depends on PROC_FS | |
14cf11af PM |
568 | help |
569 | This option adds a device-tree directory under /proc which contains | |
570 | an image of the device tree that the kernel copies from Open | |
5f296755 | 571 | Firmware or other boot firmware. If unsure, say Y here. |
14cf11af | 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 | ||
14cf11af PM |
647 | config GENERIC_ISA_DMA |
648 | bool | |
649 | depends on PPC64 || POWER4 || 6xx && !CPM2 | |
650 | default y | |
651 | ||
25635c71 PM |
652 | config PPC_INDIRECT_PCI |
653 | bool | |
654 | depends on PCI | |
63dafe57 | 655 | default y if 40x || 44x |
25635c71 PM |
656 | default n |
657 | ||
14cf11af PM |
658 | config EISA |
659 | bool | |
660 | ||
661 | config SBUS | |
662 | bool | |
663 | ||
08264cbc KG |
664 | config FSL_SOC |
665 | bool | |
666 | ||
55c44991 RZ |
667 | config FSL_PCI |
668 | bool | |
669 | select PPC_INDIRECT_PCI | |
d0839118 | 670 | select PCI_QUIRKS |
55c44991 | 671 | |
4ffd6952 AV |
672 | config FSL_PMC |
673 | bool | |
674 | default y | |
675 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
676 | help | |
677 | Freescale MPC85xx/MPC86xx power management controller support | |
678 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
679 | ||
2a706919 SR |
680 | config 4xx_SOC |
681 | bool | |
682 | ||
acaa7aa3 AV |
683 | config FSL_LBC |
684 | bool | |
685 | help | |
686 | Freescale Localbus support | |
687 | ||
83ff9dcf AV |
688 | config FSL_GTM |
689 | bool | |
690 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
691 | help | |
692 | Freescale General-purpose Timers support | |
693 | ||
14cf11af PM |
694 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
695 | config MCA | |
696 | bool | |
697 | ||
b500563b JR |
698 | # Platforms that what PCI turned unconditionally just do select PCI |
699 | # in their config node. Platforms that want to choose at config | |
700 | # time should select PPC_PCI_CHOICE | |
701 | config PPC_PCI_CHOICE | |
702 | bool | |
703 | ||
14cf11af | 704 | config PCI |
b500563b JR |
705 | bool "PCI support" if PPC_PCI_CHOICE |
706 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
bcc48591 | 707 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
f21f49ea | 708 | default PCI_PERMEDIA if !4xx && !CPM2 && !8xx |
14cf11af | 709 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
df87ef55 | 710 | select ARCH_SUPPORTS_MSI |
14cf11af PM |
711 | help |
712 | Find out whether your system includes a PCI bus. PCI is the name of | |
713 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
714 | your box. If you say Y here, the kernel will include drivers and | |
715 | infrastructure code to support PCI bus devices. | |
716 | ||
717 | config PCI_DOMAINS | |
36e23590 MW |
718 | def_bool PCI |
719 | ||
720 | config PCI_SYSCALL | |
721 | def_bool PCI | |
14cf11af | 722 | |
14cf11af PM |
723 | config PCI_QSPAN |
724 | bool "QSpan PCI" | |
725 | depends on !4xx && !CPM2 && 8xx | |
f9bd170a | 726 | select PPC_I8259 |
14cf11af PM |
727 | help |
728 | Say Y here if you have a system based on a Motorola 8xx-series | |
729 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
730 | ||
731 | config PCI_8260 | |
732 | bool | |
733 | depends on PCI && 8260 | |
25635c71 | 734 | select PPC_INDIRECT_PCI |
14cf11af PM |
735 | default y |
736 | ||
737 | config 8260_PCI9 | |
4a3ecc62 | 738 | bool "Enable workaround for MPC826x erratum PCI 9" |
e00c5498 | 739 | depends on PCI_8260 && !8272 |
14cf11af PM |
740 | default y |
741 | ||
742 | choice | |
4a3ecc62 | 743 | prompt "IDMA channel for PCI 9 workaround" |
14cf11af PM |
744 | depends on 8260_PCI9 |
745 | ||
746 | config 8260_PCI9_IDMA1 | |
747 | bool "IDMA1" | |
748 | ||
749 | config 8260_PCI9_IDMA2 | |
750 | bool "IDMA2" | |
751 | ||
752 | config 8260_PCI9_IDMA3 | |
753 | bool "IDMA3" | |
754 | ||
755 | config 8260_PCI9_IDMA4 | |
756 | bool "IDMA4" | |
757 | ||
758 | endchoice | |
759 | ||
bb53bb3d JM |
760 | source "drivers/pci/pcie/Kconfig" |
761 | ||
14cf11af PM |
762 | source "drivers/pci/Kconfig" |
763 | ||
764 | source "drivers/pcmcia/Kconfig" | |
765 | ||
766 | source "drivers/pci/hotplug/Kconfig" | |
767 | ||
f1f389d5 ZW |
768 | config HAS_RAPIDIO |
769 | bool | |
770 | default n | |
771 | ||
772 | config RAPIDIO | |
773 | bool "RapidIO support" | |
774 | depends on HAS_RAPIDIO | |
775 | help | |
776 | If you say Y here, the kernel will include drivers and | |
777 | infrastructure code to support RapidIO interconnect devices. | |
778 | ||
779 | source "drivers/rapidio/Kconfig" | |
780 | ||
14cf11af PM |
781 | endmenu |
782 | ||
783 | menu "Advanced setup" | |
784 | depends on PPC32 | |
785 | ||
786 | config ADVANCED_OPTIONS | |
787 | bool "Prompt for advanced kernel configuration options" | |
788 | help | |
789 | This option will enable prompting for a variety of advanced kernel | |
790 | configuration options. These options can cause the kernel to not | |
791 | work if they are set incorrectly, but can be used to optimize certain | |
792 | aspects of kernel memory management. | |
793 | ||
794 | Unless you know what you are doing, say N here. | |
795 | ||
796 | comment "Default settings for advanced configuration options are used" | |
797 | depends on !ADVANCED_OPTIONS | |
798 | ||
14cf11af PM |
799 | config LOWMEM_SIZE_BOOL |
800 | bool "Set maximum low memory" | |
801 | depends on ADVANCED_OPTIONS | |
802 | help | |
803 | This option allows you to set the maximum amount of memory which | |
804 | will be used as "low memory", that is, memory which the kernel can | |
805 | access directly, without having to set up a kernel virtual mapping. | |
806 | This can be useful in optimizing the layout of kernel virtual | |
807 | memory. | |
808 | ||
809 | Say N here unless you know what you are doing. | |
810 | ||
811 | config LOWMEM_SIZE | |
812 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
813 | default "0x30000000" | |
814 | ||
96051465 TP |
815 | config LOWMEM_CAM_NUM_BOOL |
816 | bool "Set number of CAMs to use to map low memory" | |
817 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
818 | help | |
819 | This option allows you to set the maximum number of CAM slots that | |
820 | will be used to map low memory. There are a limited number of slots | |
821 | available and even more limited number that will fit in the L1 MMU. | |
822 | However, using more entries will allow mapping more low memory. This | |
823 | can be useful in optimizing the layout of kernel virtual memory. | |
824 | ||
825 | Say N here unless you know what you are doing. | |
826 | ||
827 | config LOWMEM_CAM_NUM | |
9b71dbd3 | 828 | depends on FSL_BOOKE |
96051465 TP |
829 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
830 | default 3 | |
831 | ||
37dd2bad KG |
832 | config RELOCATABLE |
833 | bool "Build a relocatable kernel (EXPERIMENTAL)" | |
834 | depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
835 | help | |
836 | This builds a kernel image that is capable of running at the | |
837 | location the kernel is loaded at (some alignment restrictions may | |
838 | exist). | |
839 | ||
840 | One use is for the kexec on panic case where the recovery kernel | |
841 | must live at a different physical address than the primary | |
842 | kernel. | |
843 | ||
844 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
845 | it has been loaded at and the compile time physical addresses | |
846 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
847 | setting can still be useful to bootwrappers that need to know the | |
848 | load location of the kernel (eg. u-boot/mkimage). | |
849 | ||
850 | config PAGE_OFFSET_BOOL | |
851 | bool "Set custom page offset address" | |
852 | depends on ADVANCED_OPTIONS | |
853 | help | |
854 | This option allows you to set the kernel virtual address at which | |
855 | the kernel will map low memory. This can be useful in optimizing | |
856 | the virtual memory layout of the system. | |
857 | ||
858 | Say N here unless you know what you are doing. | |
859 | ||
860 | config PAGE_OFFSET | |
861 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
862 | default "0xc0000000" | |
863 | ||
14cf11af PM |
864 | config KERNEL_START_BOOL |
865 | bool "Set custom kernel base address" | |
866 | depends on ADVANCED_OPTIONS | |
867 | help | |
868 | This option allows you to set the kernel virtual address at which | |
37dd2bad KG |
869 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
870 | however there are times (like kdump) that one might not want them | |
871 | to be the same. | |
14cf11af PM |
872 | |
873 | Say N here unless you know what you are doing. | |
874 | ||
875 | config KERNEL_START | |
876 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
37dd2bad KG |
877 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
878 | default "0xc2000000" if CRASH_DUMP | |
14cf11af PM |
879 | default "0xc0000000" |
880 | ||
37dd2bad KG |
881 | config PHYSICAL_START_BOOL |
882 | bool "Set physical address where the kernel is loaded" | |
883 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
884 | help | |
885 | This gives the physical address where the kernel is loaded. | |
886 | ||
887 | Say N here unless you know what you are doing. | |
888 | ||
889 | config PHYSICAL_START | |
890 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
891 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP | |
892 | default "0x00000000" | |
893 | ||
894 | config PHYSICAL_ALIGN | |
895 | hex | |
c8f3570b | 896 | default "0x04000000" if FSL_BOOKE |
37dd2bad KG |
897 | help |
898 | This value puts the alignment restrictions on physical address | |
899 | where kernel is loaded and run from. Kernel is compiled for an | |
900 | address which meets above alignment restriction. | |
901 | ||
14cf11af PM |
902 | config TASK_SIZE_BOOL |
903 | bool "Set custom user task size" | |
904 | depends on ADVANCED_OPTIONS | |
905 | help | |
906 | This option allows you to set the amount of virtual address space | |
907 | allocated to user tasks. This can be useful in optimizing the | |
908 | virtual memory layout of the system. | |
909 | ||
910 | Say N here unless you know what you are doing. | |
911 | ||
912 | config TASK_SIZE | |
913 | hex "Size of user task space" if TASK_SIZE_BOOL | |
4d9e5510 KG |
914 | default "0x80000000" if PPC_PREP || PPC_8xx |
915 | default "0xc0000000" | |
14cf11af | 916 | |
84532a0f BH |
917 | config CONSISTENT_SIZE_BOOL |
918 | bool "Set custom consistent memory pool size" | |
919 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
920 | help | |
921 | This option allows you to set the size of the | |
922 | consistent memory pool. This pool of virtual memory | |
923 | is used to make consistent memory allocations. | |
924 | ||
925 | config CONSISTENT_SIZE | |
926 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
927 | default "0x00200000" if NOT_COHERENT_CACHE | |
928 | ||
14cf11af PM |
929 | config PIN_TLB |
930 | bool "Pinned Kernel TLBs (860 ONLY)" | |
931 | depends on ADVANCED_OPTIONS && 8xx | |
932 | endmenu | |
933 | ||
cabb5587 | 934 | if PPC64 |
549e8152 PM |
935 | config RELOCATABLE |
936 | bool "Build a relocatable kernel" | |
937 | help | |
938 | This builds a kernel image that is capable of running anywhere | |
939 | in the RMA (real memory area) at any 16k-aligned base address. | |
940 | The kernel is linked as a position-independent executable (PIE) | |
941 | and contains dynamic relocations which are processed early | |
942 | in the bootup process. | |
943 | ||
944 | One use is for the kexec on panic case where the recovery kernel | |
945 | must live at a different physical address than the primary | |
946 | kernel. | |
947 | ||
37dd2bad KG |
948 | config PAGE_OFFSET |
949 | hex | |
950 | default "0xc000000000000000" | |
cabb5587 SR |
951 | config KERNEL_START |
952 | hex | |
eeb2d218 | 953 | default "0xc000000000000000" |
37dd2bad KG |
954 | config PHYSICAL_START |
955 | hex | |
37dd2bad | 956 | default "0x00000000" |
cabb5587 SR |
957 | endif |
958 | ||
14cf11af PM |
959 | source "net/Kconfig" |
960 | ||
961 | source "drivers/Kconfig" | |
962 | ||
963 | source "fs/Kconfig" | |
964 | ||
98658538 LY |
965 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
966 | ||
14cf11af PM |
967 | source "lib/Kconfig" |
968 | ||
14cf11af PM |
969 | source "arch/powerpc/Kconfig.debug" |
970 | ||
971 | source "security/Kconfig" | |
972 | ||
973 | config KEYS_COMPAT | |
974 | bool | |
975 | depends on COMPAT && KEYS | |
976 | default y | |
977 | ||
978 | source "crypto/Kconfig" | |
6f668280 DP |
979 | |
980 | config PPC_CLOCK | |
981 | bool | |
982 | default n | |
9483a578 | 983 | select HAVE_CLK |
1088a209 SM |
984 | |
985 | config PPC_LIB_RHEAP | |
986 | bool | |
987 | ||
bbf45ba5 | 988 | source "arch/powerpc/kvm/Kconfig" |