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1 | source "arch/powerpc/platforms/Kconfig.cputype" | |
2 | ||
3 | config PPC32 | |
4 | bool | |
5 | default y if !PPC64 | |
6 | ||
7 | config 32BIT | |
8 | bool | |
9 | default y if PPC32 | |
10 | ||
11 | config 64BIT | |
12 | bool | |
13 | default y if PPC64 | |
14 | ||
15 | config WORD_SIZE | |
16 | int | |
17 | default 64 if PPC64 | |
18 | default 32 if !PPC64 | |
19 | ||
20 | config ARCH_PHYS_ADDR_T_64BIT | |
21 | def_bool PPC64 || PHYS_64BIT | |
22 | ||
23 | config ARCH_DMA_ADDR_T_64BIT | |
24 | def_bool ARCH_PHYS_ADDR_T_64BIT | |
25 | ||
26 | config MMU | |
27 | bool | |
28 | default y | |
29 | ||
30 | config HAVE_SETUP_PER_CPU_AREA | |
31 | def_bool PPC64 | |
32 | ||
33 | config NEED_PER_CPU_EMBED_FIRST_CHUNK | |
34 | def_bool PPC64 | |
35 | ||
36 | config NR_IRQS | |
37 | int "Number of virtual interrupt numbers" | |
38 | range 32 32768 | |
39 | default "512" | |
40 | help | |
41 | This defines the number of virtual interrupt numbers the kernel | |
42 | can manage. Virtual interrupt numbers are what you see in | |
43 | /proc/interrupts. If you configure your system to have too few, | |
44 | drivers will fail to load or worse - handle with care. | |
45 | ||
46 | config STACKTRACE_SUPPORT | |
47 | bool | |
48 | default y | |
49 | ||
50 | config TRACE_IRQFLAGS_SUPPORT | |
51 | bool | |
52 | default y | |
53 | ||
54 | config LOCKDEP_SUPPORT | |
55 | bool | |
56 | default y | |
57 | ||
58 | config RWSEM_GENERIC_SPINLOCK | |
59 | bool | |
60 | ||
61 | config RWSEM_XCHGADD_ALGORITHM | |
62 | bool | |
63 | default y | |
64 | ||
65 | config GENERIC_LOCKBREAK | |
66 | bool | |
67 | default y | |
68 | depends on SMP && PREEMPT | |
69 | ||
70 | config ARCH_HAS_ILOG2_U32 | |
71 | bool | |
72 | default y | |
73 | ||
74 | config ARCH_HAS_ILOG2_U64 | |
75 | bool | |
76 | default y if 64BIT | |
77 | ||
78 | config GENERIC_HWEIGHT | |
79 | bool | |
80 | default y | |
81 | ||
82 | config ARCH_HAS_DMA_SET_COHERENT_MASK | |
83 | bool | |
84 | ||
85 | config PPC | |
86 | bool | |
87 | default y | |
88 | select ARCH_MIGHT_HAVE_PC_PARPORT | |
89 | select ARCH_MIGHT_HAVE_PC_SERIO | |
90 | select BINFMT_ELF | |
91 | select ARCH_HAS_ELF_RANDOMIZE | |
92 | select OF | |
93 | select OF_EARLY_FLATTREE | |
94 | select OF_RESERVED_MEM | |
95 | select HAVE_FTRACE_MCOUNT_RECORD | |
96 | select HAVE_DYNAMIC_FTRACE | |
97 | select HAVE_FUNCTION_TRACER | |
98 | select HAVE_FUNCTION_GRAPH_TRACER | |
99 | select SYSCTL_EXCEPTION_TRACE | |
100 | select ARCH_WANT_OPTIONAL_GPIOLIB | |
101 | select VIRT_TO_BUS if !PPC64 | |
102 | select HAVE_IDE | |
103 | select HAVE_IOREMAP_PROT | |
104 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN | |
105 | select HAVE_KPROBES | |
106 | select HAVE_ARCH_KGDB | |
107 | select HAVE_KRETPROBES | |
108 | select HAVE_ARCH_TRACEHOOK | |
109 | select HAVE_MEMBLOCK | |
110 | select HAVE_MEMBLOCK_NODE_MAP | |
111 | select HAVE_DMA_API_DEBUG | |
112 | select HAVE_OPROFILE | |
113 | select HAVE_DEBUG_KMEMLEAK | |
114 | select ARCH_HAS_SG_CHAIN | |
115 | select GENERIC_ATOMIC64 if PPC32 | |
116 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE | |
117 | select HAVE_PERF_EVENTS | |
118 | select HAVE_REGS_AND_STACK_ACCESS_API | |
119 | select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 | |
120 | select ARCH_WANT_IPC_PARSE_VERSION | |
121 | select SPARSE_IRQ | |
122 | select IRQ_DOMAIN | |
123 | select GENERIC_IRQ_SHOW | |
124 | select GENERIC_IRQ_SHOW_LEVEL | |
125 | select IRQ_FORCED_THREADING | |
126 | select HAVE_RCU_TABLE_FREE if SMP | |
127 | select HAVE_SYSCALL_TRACEPOINTS | |
128 | select HAVE_BPF_JIT | |
129 | select HAVE_ARCH_JUMP_LABEL | |
130 | select ARCH_HAVE_NMI_SAFE_CMPXCHG | |
131 | select ARCH_HAS_GCOV_PROFILE_ALL | |
132 | select GENERIC_SMP_IDLE_THREAD | |
133 | select GENERIC_CMOS_UPDATE | |
134 | select GENERIC_TIME_VSYSCALL_OLD | |
135 | select GENERIC_CLOCKEVENTS | |
136 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP | |
137 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST | |
138 | select GENERIC_STRNCPY_FROM_USER | |
139 | select GENERIC_STRNLEN_USER | |
140 | select HAVE_MOD_ARCH_SPECIFIC | |
141 | select MODULES_USE_ELF_RELA | |
142 | select CLONE_BACKWARDS | |
143 | select ARCH_USE_BUILTIN_BSWAP | |
144 | select OLD_SIGSUSPEND | |
145 | select OLD_SIGACTION if PPC32 | |
146 | select HAVE_DEBUG_STACKOVERFLOW | |
147 | select HAVE_IRQ_EXIT_ON_IRQ_STACK | |
148 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 | |
149 | select HAVE_ARCH_AUDITSYSCALL | |
150 | select ARCH_SUPPORTS_ATOMIC_RMW | |
151 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN | |
152 | select NO_BOOTMEM | |
153 | select HAVE_GENERIC_RCU_GUP | |
154 | select HAVE_PERF_EVENTS_NMI if PPC64 | |
155 | select EDAC_SUPPORT | |
156 | select EDAC_ATOMIC_SCRUB | |
157 | select ARCH_HAS_DMA_SET_COHERENT_MASK | |
158 | select ARCH_HAS_DEVMEM_IS_ALLOWED | |
159 | select HAVE_ARCH_SECCOMP_FILTER | |
160 | select ARCH_HAS_UBSAN_SANITIZE_ALL | |
161 | ||
162 | config GENERIC_CSUM | |
163 | def_bool CPU_LITTLE_ENDIAN | |
164 | ||
165 | config EARLY_PRINTK | |
166 | bool | |
167 | default y | |
168 | ||
169 | config PANIC_TIMEOUT | |
170 | int | |
171 | default 180 | |
172 | ||
173 | config COMPAT | |
174 | bool | |
175 | default y if PPC64 | |
176 | select COMPAT_BINFMT_ELF | |
177 | select ARCH_WANT_OLD_COMPAT_IPC | |
178 | select COMPAT_OLD_SIGACTION | |
179 | ||
180 | config SYSVIPC_COMPAT | |
181 | bool | |
182 | depends on COMPAT && SYSVIPC | |
183 | default y | |
184 | ||
185 | # All PPC32s use generic nvram driver through ppc_md | |
186 | config GENERIC_NVRAM | |
187 | bool | |
188 | default y if PPC32 | |
189 | ||
190 | config SCHED_OMIT_FRAME_POINTER | |
191 | bool | |
192 | default y | |
193 | ||
194 | config ARCH_MAY_HAVE_PC_FDC | |
195 | bool | |
196 | default PCI | |
197 | ||
198 | config PPC_UDBG_16550 | |
199 | bool | |
200 | default n | |
201 | ||
202 | config GENERIC_TBSYNC | |
203 | bool | |
204 | default y if PPC32 && SMP | |
205 | default n | |
206 | ||
207 | config AUDIT_ARCH | |
208 | bool | |
209 | default y | |
210 | ||
211 | config GENERIC_BUG | |
212 | bool | |
213 | default y | |
214 | depends on BUG | |
215 | ||
216 | config SYS_SUPPORTS_APM_EMULATION | |
217 | default y if PMAC_APM_EMU | |
218 | bool | |
219 | ||
220 | config EPAPR_BOOT | |
221 | bool | |
222 | help | |
223 | Used to allow a board to specify it wants an ePAPR compliant wrapper. | |
224 | default n | |
225 | ||
226 | config DEFAULT_UIMAGE | |
227 | bool | |
228 | help | |
229 | Used to allow a board to specify it wants a uImage built by default | |
230 | default n | |
231 | ||
232 | config ARCH_HIBERNATION_POSSIBLE | |
233 | bool | |
234 | default y | |
235 | ||
236 | config ARCH_SUSPEND_POSSIBLE | |
237 | def_bool y | |
238 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ | |
239 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ | |
240 | || 44x || 40x | |
241 | ||
242 | config PPC_DCR_NATIVE | |
243 | bool | |
244 | default n | |
245 | ||
246 | config PPC_DCR_MMIO | |
247 | bool | |
248 | default n | |
249 | ||
250 | config PPC_DCR | |
251 | bool | |
252 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO | |
253 | default y | |
254 | ||
255 | config PPC_OF_PLATFORM_PCI | |
256 | bool | |
257 | depends on PCI | |
258 | depends on PPC64 # not supported on 32 bits yet | |
259 | default n | |
260 | ||
261 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC | |
262 | depends on PPC32 || PPC_STD_MMU_64 | |
263 | def_bool y | |
264 | ||
265 | config ARCH_SUPPORTS_UPROBES | |
266 | def_bool y | |
267 | ||
268 | config PPC_ADV_DEBUG_REGS | |
269 | bool | |
270 | depends on 40x || BOOKE | |
271 | default y | |
272 | ||
273 | config PPC_ADV_DEBUG_IACS | |
274 | int | |
275 | depends on PPC_ADV_DEBUG_REGS | |
276 | default 4 if 44x | |
277 | default 2 | |
278 | ||
279 | config PPC_ADV_DEBUG_DACS | |
280 | int | |
281 | depends on PPC_ADV_DEBUG_REGS | |
282 | default 2 | |
283 | ||
284 | config PPC_ADV_DEBUG_DVCS | |
285 | int | |
286 | depends on PPC_ADV_DEBUG_REGS | |
287 | default 2 if 44x | |
288 | default 0 | |
289 | ||
290 | config PPC_ADV_DEBUG_DAC_RANGE | |
291 | bool | |
292 | depends on PPC_ADV_DEBUG_REGS && 44x | |
293 | default y | |
294 | ||
295 | config PPC_EMULATE_SSTEP | |
296 | bool | |
297 | default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT | |
298 | ||
299 | config ZONE_DMA32 | |
300 | bool | |
301 | default y if PPC64 | |
302 | ||
303 | config PGTABLE_LEVELS | |
304 | int | |
305 | default 2 if !PPC64 | |
306 | default 3 if PPC_64K_PAGES | |
307 | default 4 | |
308 | ||
309 | source "init/Kconfig" | |
310 | ||
311 | source "kernel/Kconfig.freezer" | |
312 | ||
313 | source "arch/powerpc/sysdev/Kconfig" | |
314 | source "arch/powerpc/platforms/Kconfig" | |
315 | ||
316 | menu "Kernel options" | |
317 | ||
318 | config HIGHMEM | |
319 | bool "High memory support" | |
320 | depends on PPC32 | |
321 | ||
322 | source kernel/Kconfig.hz | |
323 | source kernel/Kconfig.preempt | |
324 | source "fs/Kconfig.binfmt" | |
325 | ||
326 | config HUGETLB_PAGE_SIZE_VARIABLE | |
327 | bool | |
328 | depends on HUGETLB_PAGE | |
329 | default y | |
330 | ||
331 | config MATH_EMULATION | |
332 | bool "Math emulation" | |
333 | depends on 4xx || 8xx || PPC_MPC832x || BOOKE | |
334 | ---help--- | |
335 | Some PowerPC chips designed for embedded applications do not have | |
336 | a floating-point unit and therefore do not implement the | |
337 | floating-point instructions in the PowerPC instruction set. If you | |
338 | say Y here, the kernel will include code to emulate a floating-point | |
339 | unit, which will allow programs that use floating-point | |
340 | instructions to run. | |
341 | ||
342 | This is also useful to emulate missing (optional) instructions | |
343 | such as fsqrt on cores that do have an FPU but do not implement | |
344 | them (such as Freescale BookE). | |
345 | ||
346 | choice | |
347 | prompt "Math emulation options" | |
348 | default MATH_EMULATION_FULL | |
349 | depends on MATH_EMULATION | |
350 | ||
351 | config MATH_EMULATION_FULL | |
352 | bool "Emulate all the floating point instructions" | |
353 | ---help--- | |
354 | Select this option will enable the kernel to support to emulate | |
355 | all the floating point instructions. If your SoC doesn't have | |
356 | a FPU, you should select this. | |
357 | ||
358 | config MATH_EMULATION_HW_UNIMPLEMENTED | |
359 | bool "Just emulate the FPU unimplemented instructions" | |
360 | ---help--- | |
361 | Select this if you know there does have a hardware FPU on your | |
362 | SoC, but some floating point instructions are not implemented by that. | |
363 | ||
364 | endchoice | |
365 | ||
366 | config PPC_TRANSACTIONAL_MEM | |
367 | bool "Transactional Memory support for POWERPC" | |
368 | depends on PPC_BOOK3S_64 | |
369 | depends on SMP | |
370 | select ALTIVEC | |
371 | select VSX | |
372 | default n | |
373 | ---help--- | |
374 | Support user-mode Transactional Memory on POWERPC. | |
375 | ||
376 | config IOMMU_HELPER | |
377 | def_bool PPC64 | |
378 | ||
379 | config SWIOTLB | |
380 | bool "SWIOTLB support" | |
381 | default n | |
382 | select IOMMU_HELPER | |
383 | ---help--- | |
384 | Support for IO bounce buffering for systems without an IOMMU. | |
385 | This allows us to DMA to the full physical address space on | |
386 | platforms where the size of a physical address is larger | |
387 | than the bus address. Not all platforms support this. | |
388 | ||
389 | config HOTPLUG_CPU | |
390 | bool "Support for enabling/disabling CPUs" | |
391 | depends on SMP && (PPC_PSERIES || \ | |
392 | PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC)) | |
393 | ---help--- | |
394 | Say Y here to be able to disable and re-enable individual | |
395 | CPUs at runtime on SMP machines. | |
396 | ||
397 | Say N if you are unsure. | |
398 | ||
399 | config ARCH_CPU_PROBE_RELEASE | |
400 | def_bool y | |
401 | depends on HOTPLUG_CPU | |
402 | ||
403 | config ARCH_ENABLE_MEMORY_HOTPLUG | |
404 | def_bool y | |
405 | ||
406 | config ARCH_HAS_WALK_MEMORY | |
407 | def_bool y | |
408 | ||
409 | config ARCH_ENABLE_MEMORY_HOTREMOVE | |
410 | def_bool y | |
411 | ||
412 | config PPC64_SUPPORTS_MEMORY_FAILURE | |
413 | bool "Add support for memory hwpoison" | |
414 | depends on PPC_BOOK3S_64 | |
415 | default "y" if PPC_POWERNV | |
416 | select ARCH_SUPPORTS_MEMORY_FAILURE | |
417 | ||
418 | config KEXEC | |
419 | bool "kexec system call" | |
420 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E | |
421 | select KEXEC_CORE | |
422 | help | |
423 | kexec is a system call that implements the ability to shutdown your | |
424 | current kernel, and to start another kernel. It is like a reboot | |
425 | but it is independent of the system firmware. And like a reboot | |
426 | you can start any kernel with it, not just Linux. | |
427 | ||
428 | The name comes from the similarity to the exec system call. | |
429 | ||
430 | It is an ongoing process to be certain the hardware in a machine | |
431 | is properly shutdown, so do not be surprised if this code does not | |
432 | initially work for you. As of this writing the exact hardware | |
433 | interface is strongly in flux, so no good recommendation can be | |
434 | made. | |
435 | ||
436 | config CRASH_DUMP | |
437 | bool "Build a kdump crash kernel" | |
438 | depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) | |
439 | select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE | |
440 | help | |
441 | Build a kernel suitable for use as a kdump capture kernel. | |
442 | The same kernel binary can be used as production kernel and dump | |
443 | capture kernel. | |
444 | ||
445 | config FA_DUMP | |
446 | bool "Firmware-assisted dump" | |
447 | depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC | |
448 | help | |
449 | A robust mechanism to get reliable kernel crash dump with | |
450 | assistance from firmware. This approach does not use kexec, | |
451 | instead firmware assists in booting the kdump kernel | |
452 | while preserving memory contents. Firmware-assisted dump | |
453 | is meant to be a kdump replacement offering robustness and | |
454 | speed not possible without system firmware assistance. | |
455 | ||
456 | If unsure, say "N" | |
457 | ||
458 | config IRQ_ALL_CPUS | |
459 | bool "Distribute interrupts on all CPUs by default" | |
460 | depends on SMP | |
461 | help | |
462 | This option gives the kernel permission to distribute IRQs across | |
463 | multiple CPUs. Saying N here will route all IRQs to the first | |
464 | CPU. Generally saying Y is safe, although some problems have been | |
465 | reported with SMP Power Macintoshes with this option enabled. | |
466 | ||
467 | config NUMA | |
468 | bool "NUMA support" | |
469 | depends on PPC64 | |
470 | default y if SMP && PPC_PSERIES | |
471 | ||
472 | config NODES_SHIFT | |
473 | int | |
474 | default "8" if PPC64 | |
475 | default "4" | |
476 | depends on NEED_MULTIPLE_NODES | |
477 | ||
478 | config USE_PERCPU_NUMA_NODE_ID | |
479 | def_bool y | |
480 | depends on NUMA | |
481 | ||
482 | config HAVE_MEMORYLESS_NODES | |
483 | def_bool y | |
484 | depends on NUMA | |
485 | ||
486 | config ARCH_SELECT_MEMORY_MODEL | |
487 | def_bool y | |
488 | depends on PPC64 | |
489 | ||
490 | config ARCH_FLATMEM_ENABLE | |
491 | def_bool y | |
492 | depends on (PPC64 && !NUMA) || PPC32 | |
493 | ||
494 | config ARCH_SPARSEMEM_ENABLE | |
495 | def_bool y | |
496 | depends on PPC64 | |
497 | select SPARSEMEM_VMEMMAP_ENABLE | |
498 | ||
499 | config ARCH_SPARSEMEM_DEFAULT | |
500 | def_bool y | |
501 | depends on (SMP && PPC_PSERIES) || PPC_PS3 | |
502 | ||
503 | config SYS_SUPPORTS_HUGETLBFS | |
504 | bool | |
505 | ||
506 | source "mm/Kconfig" | |
507 | ||
508 | config ARCH_MEMORY_PROBE | |
509 | def_bool y | |
510 | depends on MEMORY_HOTPLUG | |
511 | ||
512 | # Some NUMA nodes have memory ranges that span | |
513 | # other nodes. Even though a pfn is valid and | |
514 | # between a node's start and end pfns, it may not | |
515 | # reside on that node. See memmap_init_zone() | |
516 | # for details. | |
517 | config NODES_SPAN_OTHER_NODES | |
518 | def_bool y | |
519 | depends on NEED_MULTIPLE_NODES | |
520 | ||
521 | config STDBINUTILS | |
522 | bool "Using standard binutils settings" | |
523 | depends on 44x | |
524 | default y | |
525 | help | |
526 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. | |
527 | Note, that kernel will be able to run only those applications, | |
528 | which had been compiled using binutils later than 2.17.50.0.3 with | |
529 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using | |
530 | the older binutils, you can patch them with a trivial patch, which | |
531 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. | |
532 | ||
533 | choice | |
534 | prompt "Page size" | |
535 | default PPC_4K_PAGES | |
536 | help | |
537 | Select the kernel logical page size. Increasing the page size | |
538 | will reduce software overhead at each page boundary, allow | |
539 | hardware prefetch mechanisms to be more effective, and allow | |
540 | larger dma transfers increasing IO efficiency and reducing | |
541 | overhead. However the utilization of memory will increase. | |
542 | For example, each cached file will using a multiple of the | |
543 | page size to hold its contents and the difference between the | |
544 | end of file and the end of page is wasted. | |
545 | ||
546 | Some dedicated systems, such as software raid serving with | |
547 | accelerated calculations, have shown significant increases. | |
548 | ||
549 | If you configure a 64 bit kernel for 64k pages but the | |
550 | processor does not support them, then the kernel will simulate | |
551 | them with 4k pages, loading them on demand, but with the | |
552 | reduced software overhead and larger internal fragmentation. | |
553 | For the 32 bit kernel, a large page option will not be offered | |
554 | unless it is supported by the configured processor. | |
555 | ||
556 | If unsure, choose 4K_PAGES. | |
557 | ||
558 | config PPC_4K_PAGES | |
559 | bool "4k page size" | |
560 | select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S | |
561 | ||
562 | config PPC_16K_PAGES | |
563 | bool "16k page size" | |
564 | depends on 44x || PPC_8xx | |
565 | ||
566 | config PPC_64K_PAGES | |
567 | bool "64k page size" | |
568 | depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64) | |
569 | select HAVE_ARCH_SOFT_DIRTY if CHECKPOINT_RESTORE && PPC_BOOK3S | |
570 | ||
571 | config PPC_256K_PAGES | |
572 | bool "256k page size" | |
573 | depends on 44x && !STDBINUTILS | |
574 | help | |
575 | Make the page size 256k. | |
576 | ||
577 | As the ELF standard only requires alignment to support page | |
578 | sizes up to 64k, you will need to compile all of your user | |
579 | space applications with a non-standard binutils settings | |
580 | (see the STDBINUTILS description for details). | |
581 | ||
582 | Say N unless you know what you are doing. | |
583 | ||
584 | endchoice | |
585 | ||
586 | config FORCE_MAX_ZONEORDER | |
587 | int "Maximum zone order" | |
588 | range 9 64 if PPC64 && PPC_64K_PAGES | |
589 | default "9" if PPC64 && PPC_64K_PAGES | |
590 | range 13 64 if PPC64 && !PPC_64K_PAGES | |
591 | default "13" if PPC64 && !PPC_64K_PAGES | |
592 | range 9 64 if PPC32 && PPC_16K_PAGES | |
593 | default "9" if PPC32 && PPC_16K_PAGES | |
594 | range 7 64 if PPC32 && PPC_64K_PAGES | |
595 | default "7" if PPC32 && PPC_64K_PAGES | |
596 | range 5 64 if PPC32 && PPC_256K_PAGES | |
597 | default "5" if PPC32 && PPC_256K_PAGES | |
598 | range 11 64 | |
599 | default "11" | |
600 | help | |
601 | The kernel memory allocator divides physically contiguous memory | |
602 | blocks into "zones", where each zone is a power of two number of | |
603 | pages. This option selects the largest power of two that the kernel | |
604 | keeps in the memory allocator. If you need to allocate very large | |
605 | blocks of physically contiguous memory, then you may need to | |
606 | increase this value. | |
607 | ||
608 | This config option is actually maximum order plus one. For example, | |
609 | a value of 11 means that the largest free memory block is 2^10 pages. | |
610 | ||
611 | The page size is not necessarily 4KB. For example, on 64-bit | |
612 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep | |
613 | this in mind when choosing a value for this option. | |
614 | ||
615 | config PPC_SUBPAGE_PROT | |
616 | bool "Support setting protections for 4k subpages" | |
617 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES | |
618 | help | |
619 | This option adds support for a system call to allow user programs | |
620 | to set access permissions (read/write, readonly, or no access) | |
621 | on the 4k subpages of each 64k page. | |
622 | ||
623 | config PPC_COPRO_BASE | |
624 | bool | |
625 | default n | |
626 | ||
627 | config SCHED_SMT | |
628 | bool "SMT (Hyperthreading) scheduler support" | |
629 | depends on PPC64 && SMP | |
630 | help | |
631 | SMT scheduler support improves the CPU scheduler's decision making | |
632 | when dealing with POWER5 cpus at a cost of slightly increased | |
633 | overhead in some places. If unsure say N here. | |
634 | ||
635 | config PPC_DENORMALISATION | |
636 | bool "PowerPC denormalisation exception handling" | |
637 | depends on PPC_BOOK3S_64 | |
638 | default "y" if PPC_POWERNV | |
639 | ---help--- | |
640 | Add support for handling denormalisation of single precision | |
641 | values. Useful for bare metal only. If unsure say Y here. | |
642 | ||
643 | config CMDLINE_BOOL | |
644 | bool "Default bootloader kernel arguments" | |
645 | ||
646 | config CMDLINE | |
647 | string "Initial kernel command string" | |
648 | depends on CMDLINE_BOOL | |
649 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" | |
650 | help | |
651 | On some platforms, there is currently no way for the boot loader to | |
652 | pass arguments to the kernel. For these platforms, you can supply | |
653 | some command-line options at build time by entering them here. In | |
654 | most cases you will need to specify the root device here. | |
655 | ||
656 | config CMDLINE_FORCE | |
657 | bool "Always use the default kernel command string" | |
658 | depends on CMDLINE_BOOL | |
659 | help | |
660 | Always use the default kernel command string, even if the boot | |
661 | loader passes other arguments to the kernel. | |
662 | This is useful if you cannot or don't want to change the | |
663 | command-line options your boot loader passes to the kernel. | |
664 | ||
665 | config EXTRA_TARGETS | |
666 | string "Additional default image types" | |
667 | help | |
668 | List additional targets to be built by the bootwrapper here (separated | |
669 | by spaces). This is useful for targets that depend of device tree | |
670 | files in the .dts directory. | |
671 | ||
672 | Targets in this list will be build as part of the default build | |
673 | target, or when the user does a 'make zImage' or a | |
674 | 'make zImage.initrd'. | |
675 | ||
676 | If unsure, leave blank | |
677 | ||
678 | config ARCH_WANTS_FREEZER_CONTROL | |
679 | def_bool y | |
680 | depends on ADB_PMU | |
681 | ||
682 | source kernel/power/Kconfig | |
683 | ||
684 | config SECCOMP | |
685 | bool "Enable seccomp to safely compute untrusted bytecode" | |
686 | depends on PROC_FS | |
687 | default y | |
688 | help | |
689 | This kernel feature is useful for number crunching applications | |
690 | that may need to compute untrusted bytecode during their | |
691 | execution. By using pipes or other transports made available to | |
692 | the process as file descriptors supporting the read/write | |
693 | syscalls, it's possible to isolate those applications in | |
694 | their own address space using seccomp. Once seccomp is | |
695 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
696 | and the task is only allowed to execute a few safe syscalls | |
697 | defined by each seccomp mode. | |
698 | ||
699 | If unsure, say Y. Only embedded should say N here. | |
700 | ||
701 | endmenu | |
702 | ||
703 | config ISA_DMA_API | |
704 | bool | |
705 | default PCI | |
706 | ||
707 | menu "Bus options" | |
708 | ||
709 | config ISA | |
710 | bool "Support for ISA-bus hardware" | |
711 | depends on PPC_CHRP | |
712 | select PPC_I8259 | |
713 | help | |
714 | Find out whether you have ISA slots on your motherboard. ISA is the | |
715 | name of a bus system, i.e. the way the CPU talks to the other stuff | |
716 | inside your box. If you have an Apple machine, say N here; if you | |
717 | have an IBM RS/6000 or pSeries machine, say Y. If you have an | |
718 | embedded board, consult your board documentation. | |
719 | ||
720 | config ZONE_DMA | |
721 | bool | |
722 | default y | |
723 | ||
724 | config NEED_DMA_MAP_STATE | |
725 | def_bool (PPC64 || NOT_COHERENT_CACHE) | |
726 | ||
727 | config NEED_SG_DMA_LENGTH | |
728 | def_bool y | |
729 | ||
730 | config GENERIC_ISA_DMA | |
731 | bool | |
732 | depends on ISA_DMA_API | |
733 | default y | |
734 | ||
735 | config PPC_INDIRECT_PCI | |
736 | bool | |
737 | depends on PCI | |
738 | default y if 40x || 44x | |
739 | default n | |
740 | ||
741 | config EISA | |
742 | bool | |
743 | ||
744 | config SBUS | |
745 | bool | |
746 | ||
747 | config FSL_SOC | |
748 | bool | |
749 | ||
750 | config FSL_PCI | |
751 | bool | |
752 | select PPC_INDIRECT_PCI | |
753 | select PCI_QUIRKS | |
754 | ||
755 | config FSL_PMC | |
756 | bool | |
757 | default y | |
758 | depends on SUSPEND && (PPC_85xx || PPC_86xx) | |
759 | help | |
760 | Freescale MPC85xx/MPC86xx power management controller support | |
761 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c | |
762 | ||
763 | config PPC4xx_CPM | |
764 | bool | |
765 | default y | |
766 | depends on SUSPEND && (44x || 40x) | |
767 | help | |
768 | PPC4xx Clock Power Management (CPM) support (suspend/resume). | |
769 | It also enables support for two different idle states (idle-wait | |
770 | and idle-doze). | |
771 | ||
772 | config 4xx_SOC | |
773 | bool | |
774 | ||
775 | config FSL_LBC | |
776 | bool "Freescale Local Bus support" | |
777 | depends on FSL_SOC | |
778 | help | |
779 | Enables reporting of errors from the Freescale local bus | |
780 | controller. Also contains some common code used by | |
781 | drivers for specific local bus peripherals. | |
782 | ||
783 | config FSL_GTM | |
784 | bool | |
785 | depends on PPC_83xx || QUICC_ENGINE || CPM2 | |
786 | help | |
787 | Freescale General-purpose Timers support | |
788 | ||
789 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any | |
790 | config MCA | |
791 | bool | |
792 | ||
793 | # Platforms that what PCI turned unconditionally just do select PCI | |
794 | # in their config node. Platforms that want to choose at config | |
795 | # time should select PPC_PCI_CHOICE | |
796 | config PPC_PCI_CHOICE | |
797 | bool | |
798 | ||
799 | config PCI | |
800 | bool "PCI support" if PPC_PCI_CHOICE | |
801 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ | |
802 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON | |
803 | default PCI_QSPAN if !4xx && !CPM2 && 8xx | |
804 | select GENERIC_PCI_IOMAP | |
805 | help | |
806 | Find out whether your system includes a PCI bus. PCI is the name of | |
807 | a bus system, i.e. the way the CPU talks to the other stuff inside | |
808 | your box. If you say Y here, the kernel will include drivers and | |
809 | infrastructure code to support PCI bus devices. | |
810 | ||
811 | config PCI_DOMAINS | |
812 | def_bool PCI | |
813 | ||
814 | config PCI_SYSCALL | |
815 | def_bool PCI | |
816 | ||
817 | config PCI_QSPAN | |
818 | bool "QSpan PCI" | |
819 | depends on !4xx && !CPM2 && 8xx | |
820 | select PPC_I8259 | |
821 | help | |
822 | Say Y here if you have a system based on a Motorola 8xx-series | |
823 | embedded processor with a QSPAN PCI interface, otherwise say N. | |
824 | ||
825 | config PCI_8260 | |
826 | bool | |
827 | depends on PCI && 8260 | |
828 | select PPC_INDIRECT_PCI | |
829 | default y | |
830 | ||
831 | source "drivers/pci/pcie/Kconfig" | |
832 | ||
833 | source "drivers/pci/Kconfig" | |
834 | ||
835 | source "drivers/pcmcia/Kconfig" | |
836 | ||
837 | source "drivers/pci/hotplug/Kconfig" | |
838 | ||
839 | config HAS_RAPIDIO | |
840 | bool | |
841 | default n | |
842 | ||
843 | config RAPIDIO | |
844 | tristate "RapidIO support" | |
845 | depends on HAS_RAPIDIO || PCI | |
846 | help | |
847 | If you say Y here, the kernel will include drivers and | |
848 | infrastructure code to support RapidIO interconnect devices. | |
849 | ||
850 | config FSL_RIO | |
851 | bool "Freescale Embedded SRIO Controller support" | |
852 | depends on RAPIDIO = y && HAS_RAPIDIO | |
853 | default "n" | |
854 | ---help--- | |
855 | Include support for RapidIO controller on Freescale embedded | |
856 | processors (MPC8548, MPC8641, etc). | |
857 | ||
858 | source "drivers/rapidio/Kconfig" | |
859 | ||
860 | endmenu | |
861 | ||
862 | config NONSTATIC_KERNEL | |
863 | bool | |
864 | default n | |
865 | ||
866 | menu "Advanced setup" | |
867 | depends on PPC32 | |
868 | ||
869 | config ADVANCED_OPTIONS | |
870 | bool "Prompt for advanced kernel configuration options" | |
871 | help | |
872 | This option will enable prompting for a variety of advanced kernel | |
873 | configuration options. These options can cause the kernel to not | |
874 | work if they are set incorrectly, but can be used to optimize certain | |
875 | aspects of kernel memory management. | |
876 | ||
877 | Unless you know what you are doing, say N here. | |
878 | ||
879 | comment "Default settings for advanced configuration options are used" | |
880 | depends on !ADVANCED_OPTIONS | |
881 | ||
882 | config LOWMEM_SIZE_BOOL | |
883 | bool "Set maximum low memory" | |
884 | depends on ADVANCED_OPTIONS | |
885 | help | |
886 | This option allows you to set the maximum amount of memory which | |
887 | will be used as "low memory", that is, memory which the kernel can | |
888 | access directly, without having to set up a kernel virtual mapping. | |
889 | This can be useful in optimizing the layout of kernel virtual | |
890 | memory. | |
891 | ||
892 | Say N here unless you know what you are doing. | |
893 | ||
894 | config LOWMEM_SIZE | |
895 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL | |
896 | default "0x30000000" | |
897 | ||
898 | config LOWMEM_CAM_NUM_BOOL | |
899 | bool "Set number of CAMs to use to map low memory" | |
900 | depends on ADVANCED_OPTIONS && FSL_BOOKE | |
901 | help | |
902 | This option allows you to set the maximum number of CAM slots that | |
903 | will be used to map low memory. There are a limited number of slots | |
904 | available and even more limited number that will fit in the L1 MMU. | |
905 | However, using more entries will allow mapping more low memory. This | |
906 | can be useful in optimizing the layout of kernel virtual memory. | |
907 | ||
908 | Say N here unless you know what you are doing. | |
909 | ||
910 | config LOWMEM_CAM_NUM | |
911 | depends on FSL_BOOKE | |
912 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL | |
913 | default 3 | |
914 | ||
915 | config DYNAMIC_MEMSTART | |
916 | bool "Enable page aligned dynamic load address for kernel" | |
917 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) | |
918 | select NONSTATIC_KERNEL | |
919 | help | |
920 | This option enables the kernel to be loaded at any page aligned | |
921 | physical address. The kernel creates a mapping from KERNELBASE to | |
922 | the address where the kernel is loaded. The page size here implies | |
923 | the TLB page size of the mapping for kernel on the particular platform. | |
924 | Please refer to the init code for finding the TLB page size. | |
925 | ||
926 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE | |
927 | kernel image, where the only restriction is the page aligned kernel | |
928 | load address. When this option is enabled, the compile time physical | |
929 | address CONFIG_PHYSICAL_START is ignored. | |
930 | ||
931 | This option is overridden by CONFIG_RELOCATABLE | |
932 | ||
933 | config RELOCATABLE | |
934 | bool "Build a relocatable kernel" | |
935 | depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE) | |
936 | select NONSTATIC_KERNEL | |
937 | help | |
938 | This builds a kernel image that is capable of running at the | |
939 | location the kernel is loaded at, without any alignment restrictions. | |
940 | This feature is a superset of DYNAMIC_MEMSTART and hence overrides it. | |
941 | ||
942 | One use is for the kexec on panic case where the recovery kernel | |
943 | must live at a different physical address than the primary | |
944 | kernel. | |
945 | ||
946 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address | |
947 | it has been loaded at and the compile time physical addresses | |
948 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START | |
949 | setting can still be useful to bootwrappers that need to know the | |
950 | load address of the kernel (eg. u-boot/mkimage). | |
951 | ||
952 | config RELOCATABLE_PPC32 | |
953 | def_bool y | |
954 | depends on PPC32 && RELOCATABLE | |
955 | ||
956 | config PAGE_OFFSET_BOOL | |
957 | bool "Set custom page offset address" | |
958 | depends on ADVANCED_OPTIONS | |
959 | help | |
960 | This option allows you to set the kernel virtual address at which | |
961 | the kernel will map low memory. This can be useful in optimizing | |
962 | the virtual memory layout of the system. | |
963 | ||
964 | Say N here unless you know what you are doing. | |
965 | ||
966 | config PAGE_OFFSET | |
967 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL | |
968 | default "0xc0000000" | |
969 | ||
970 | config KERNEL_START_BOOL | |
971 | bool "Set custom kernel base address" | |
972 | depends on ADVANCED_OPTIONS | |
973 | help | |
974 | This option allows you to set the kernel virtual address at which | |
975 | the kernel will be loaded. Normally this should match PAGE_OFFSET | |
976 | however there are times (like kdump) that one might not want them | |
977 | to be the same. | |
978 | ||
979 | Say N here unless you know what you are doing. | |
980 | ||
981 | config KERNEL_START | |
982 | hex "Virtual address of kernel base" if KERNEL_START_BOOL | |
983 | default PAGE_OFFSET if PAGE_OFFSET_BOOL | |
984 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL | |
985 | default "0xc0000000" | |
986 | ||
987 | config PHYSICAL_START_BOOL | |
988 | bool "Set physical address where the kernel is loaded" | |
989 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE | |
990 | help | |
991 | This gives the physical address where the kernel is loaded. | |
992 | ||
993 | Say N here unless you know what you are doing. | |
994 | ||
995 | config PHYSICAL_START | |
996 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL | |
997 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL | |
998 | default "0x00000000" | |
999 | ||
1000 | config PHYSICAL_ALIGN | |
1001 | hex | |
1002 | default "0x04000000" if FSL_BOOKE | |
1003 | help | |
1004 | This value puts the alignment restrictions on physical address | |
1005 | where kernel is loaded and run from. Kernel is compiled for an | |
1006 | address which meets above alignment restriction. | |
1007 | ||
1008 | config TASK_SIZE_BOOL | |
1009 | bool "Set custom user task size" | |
1010 | depends on ADVANCED_OPTIONS | |
1011 | help | |
1012 | This option allows you to set the amount of virtual address space | |
1013 | allocated to user tasks. This can be useful in optimizing the | |
1014 | virtual memory layout of the system. | |
1015 | ||
1016 | Say N here unless you know what you are doing. | |
1017 | ||
1018 | config TASK_SIZE | |
1019 | hex "Size of user task space" if TASK_SIZE_BOOL | |
1020 | default "0x80000000" if PPC_8xx | |
1021 | default "0xc0000000" | |
1022 | ||
1023 | config CONSISTENT_SIZE_BOOL | |
1024 | bool "Set custom consistent memory pool size" | |
1025 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE | |
1026 | help | |
1027 | This option allows you to set the size of the | |
1028 | consistent memory pool. This pool of virtual memory | |
1029 | is used to make consistent memory allocations. | |
1030 | ||
1031 | config CONSISTENT_SIZE | |
1032 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL | |
1033 | default "0x00200000" if NOT_COHERENT_CACHE | |
1034 | ||
1035 | config PIN_TLB | |
1036 | bool "Pinned Kernel TLBs (860 ONLY)" | |
1037 | depends on ADVANCED_OPTIONS && 8xx | |
1038 | endmenu | |
1039 | ||
1040 | if PPC64 | |
1041 | config RELOCATABLE | |
1042 | bool "Build a relocatable kernel" | |
1043 | depends on !COMPILE_TEST | |
1044 | select NONSTATIC_KERNEL | |
1045 | help | |
1046 | This builds a kernel image that is capable of running anywhere | |
1047 | in the RMA (real memory area) at any 16k-aligned base address. | |
1048 | The kernel is linked as a position-independent executable (PIE) | |
1049 | and contains dynamic relocations which are processed early | |
1050 | in the bootup process. | |
1051 | ||
1052 | One use is for the kexec on panic case where the recovery kernel | |
1053 | must live at a different physical address than the primary | |
1054 | kernel. | |
1055 | ||
1056 | # This value must have zeroes in the bottom 60 bits otherwise lots will break | |
1057 | config PAGE_OFFSET | |
1058 | hex | |
1059 | default "0xc000000000000000" | |
1060 | config KERNEL_START | |
1061 | hex | |
1062 | default "0xc000000000000000" | |
1063 | config PHYSICAL_START | |
1064 | hex | |
1065 | default "0x00000000" | |
1066 | endif | |
1067 | ||
1068 | config ARCH_RANDOM | |
1069 | def_bool n | |
1070 | ||
1071 | source "net/Kconfig" | |
1072 | ||
1073 | source "drivers/Kconfig" | |
1074 | ||
1075 | source "fs/Kconfig" | |
1076 | ||
1077 | source "lib/Kconfig" | |
1078 | ||
1079 | source "arch/powerpc/Kconfig.debug" | |
1080 | ||
1081 | source "security/Kconfig" | |
1082 | ||
1083 | config KEYS_COMPAT | |
1084 | bool | |
1085 | depends on COMPAT && KEYS | |
1086 | default y | |
1087 | ||
1088 | source "crypto/Kconfig" | |
1089 | ||
1090 | config PPC_LIB_RHEAP | |
1091 | bool | |
1092 | ||
1093 | source "arch/powerpc/kvm/Kconfig" |