Root/
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 HAVE_LATENCYTOP_SUPPORT |
51 | def_bool y |
52 | |
53 | config TRACE_IRQFLAGS_SUPPORT |
54 | bool |
55 | default y |
56 | |
57 | config LOCKDEP_SUPPORT |
58 | bool |
59 | default y |
60 | |
61 | config RWSEM_GENERIC_SPINLOCK |
62 | bool |
63 | |
64 | config RWSEM_XCHGADD_ALGORITHM |
65 | bool |
66 | default y |
67 | |
68 | config GENERIC_LOCKBREAK |
69 | bool |
70 | default y |
71 | depends on SMP && PREEMPT |
72 | |
73 | config ARCH_HAS_ILOG2_U32 |
74 | bool |
75 | default y |
76 | |
77 | config ARCH_HAS_ILOG2_U64 |
78 | bool |
79 | default y if 64BIT |
80 | |
81 | config GENERIC_HWEIGHT |
82 | bool |
83 | default y |
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 OF |
92 | select OF_EARLY_FLATTREE |
93 | select OF_RESERVED_MEM |
94 | select HAVE_FTRACE_MCOUNT_RECORD |
95 | select HAVE_DYNAMIC_FTRACE |
96 | select HAVE_FUNCTION_TRACER |
97 | select HAVE_FUNCTION_GRAPH_TRACER |
98 | select SYSCTL_EXCEPTION_TRACE |
99 | select ARCH_WANT_OPTIONAL_GPIOLIB |
100 | select VIRT_TO_BUS if !PPC64 |
101 | select HAVE_IDE |
102 | select HAVE_IOREMAP_PROT |
103 | select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN |
104 | select HAVE_KPROBES |
105 | select HAVE_ARCH_KGDB |
106 | select HAVE_KRETPROBES |
107 | select HAVE_ARCH_TRACEHOOK |
108 | select HAVE_MEMBLOCK |
109 | select HAVE_MEMBLOCK_NODE_MAP |
110 | select HAVE_DMA_ATTRS |
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 if PPC64 |
129 | select HAVE_ARCH_JUMP_LABEL |
130 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
131 | select GENERIC_SMP_IDLE_THREAD |
132 | select GENERIC_CMOS_UPDATE |
133 | select GENERIC_TIME_VSYSCALL_OLD |
134 | select GENERIC_CLOCKEVENTS |
135 | select GENERIC_CLOCKEVENTS_BROADCAST if SMP |
136 | select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST |
137 | select GENERIC_STRNCPY_FROM_USER |
138 | select GENERIC_STRNLEN_USER |
139 | select HAVE_MOD_ARCH_SPECIFIC |
140 | select MODULES_USE_ELF_RELA |
141 | select CLONE_BACKWARDS |
142 | select ARCH_USE_BUILTIN_BSWAP |
143 | select OLD_SIGSUSPEND |
144 | select OLD_SIGACTION if PPC32 |
145 | select HAVE_DEBUG_STACKOVERFLOW |
146 | select HAVE_IRQ_EXIT_ON_IRQ_STACK |
147 | select ARCH_USE_CMPXCHG_LOCKREF if PPC64 |
148 | select HAVE_ARCH_AUDITSYSCALL |
149 | select ARCH_SUPPORTS_ATOMIC_RMW |
150 | select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN |
151 | |
152 | config GENERIC_CSUM |
153 | def_bool CPU_LITTLE_ENDIAN |
154 | |
155 | config EARLY_PRINTK |
156 | bool |
157 | default y |
158 | |
159 | config PANIC_TIMEOUT |
160 | int |
161 | default 180 |
162 | |
163 | config COMPAT |
164 | bool |
165 | default y if PPC64 |
166 | select COMPAT_BINFMT_ELF |
167 | select ARCH_WANT_OLD_COMPAT_IPC |
168 | select COMPAT_OLD_SIGACTION |
169 | |
170 | config SYSVIPC_COMPAT |
171 | bool |
172 | depends on COMPAT && SYSVIPC |
173 | default y |
174 | |
175 | # All PPC32s use generic nvram driver through ppc_md |
176 | config GENERIC_NVRAM |
177 | bool |
178 | default y if PPC32 |
179 | |
180 | config SCHED_OMIT_FRAME_POINTER |
181 | bool |
182 | default y |
183 | |
184 | config ARCH_MAY_HAVE_PC_FDC |
185 | bool |
186 | default PCI |
187 | |
188 | config PPC_OF |
189 | def_bool y |
190 | |
191 | config PPC_UDBG_16550 |
192 | bool |
193 | default n |
194 | |
195 | config GENERIC_TBSYNC |
196 | bool |
197 | default y if PPC32 && SMP |
198 | default n |
199 | |
200 | config AUDIT_ARCH |
201 | bool |
202 | default y |
203 | |
204 | config GENERIC_BUG |
205 | bool |
206 | default y |
207 | depends on BUG |
208 | |
209 | config SYS_SUPPORTS_APM_EMULATION |
210 | default y if PMAC_APM_EMU |
211 | bool |
212 | |
213 | config EPAPR_BOOT |
214 | bool |
215 | help |
216 | Used to allow a board to specify it wants an ePAPR compliant wrapper. |
217 | default n |
218 | |
219 | config DEFAULT_UIMAGE |
220 | bool |
221 | help |
222 | Used to allow a board to specify it wants a uImage built by default |
223 | default n |
224 | |
225 | config ARCH_HIBERNATION_POSSIBLE |
226 | bool |
227 | default y |
228 | |
229 | config ARCH_SUSPEND_POSSIBLE |
230 | def_bool y |
231 | depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \ |
232 | (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \ |
233 | || 44x || 40x |
234 | |
235 | config PPC_DCR_NATIVE |
236 | bool |
237 | default n |
238 | |
239 | config PPC_DCR_MMIO |
240 | bool |
241 | default n |
242 | |
243 | config PPC_DCR |
244 | bool |
245 | depends on PPC_DCR_NATIVE || PPC_DCR_MMIO |
246 | default y |
247 | |
248 | config PPC_OF_PLATFORM_PCI |
249 | bool |
250 | depends on PCI |
251 | depends on PPC64 # not supported on 32 bits yet |
252 | default n |
253 | |
254 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
255 | def_bool y |
256 | |
257 | config ARCH_SUPPORTS_UPROBES |
258 | def_bool y |
259 | |
260 | config PPC_ADV_DEBUG_REGS |
261 | bool |
262 | depends on 40x || BOOKE |
263 | default y |
264 | |
265 | config PPC_ADV_DEBUG_IACS |
266 | int |
267 | depends on PPC_ADV_DEBUG_REGS |
268 | default 4 if 44x |
269 | default 2 |
270 | |
271 | config PPC_ADV_DEBUG_DACS |
272 | int |
273 | depends on PPC_ADV_DEBUG_REGS |
274 | default 2 |
275 | |
276 | config PPC_ADV_DEBUG_DVCS |
277 | int |
278 | depends on PPC_ADV_DEBUG_REGS |
279 | default 2 if 44x |
280 | default 0 |
281 | |
282 | config PPC_ADV_DEBUG_DAC_RANGE |
283 | bool |
284 | depends on PPC_ADV_DEBUG_REGS && 44x |
285 | default y |
286 | |
287 | config PPC_EMULATE_SSTEP |
288 | bool |
289 | default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT |
290 | |
291 | config ZONE_DMA32 |
292 | bool |
293 | default y if PPC64 |
294 | |
295 | source "init/Kconfig" |
296 | |
297 | source "kernel/Kconfig.freezer" |
298 | |
299 | source "arch/powerpc/sysdev/Kconfig" |
300 | source "arch/powerpc/platforms/Kconfig" |
301 | |
302 | menu "Kernel options" |
303 | |
304 | config HIGHMEM |
305 | bool "High memory support" |
306 | depends on PPC32 |
307 | |
308 | source kernel/Kconfig.hz |
309 | source kernel/Kconfig.preempt |
310 | source "fs/Kconfig.binfmt" |
311 | |
312 | config HUGETLB_PAGE_SIZE_VARIABLE |
313 | bool |
314 | depends on HUGETLB_PAGE |
315 | default y |
316 | |
317 | config MATH_EMULATION |
318 | bool "Math emulation" |
319 | depends on 4xx || 8xx || PPC_MPC832x || BOOKE |
320 | ---help--- |
321 | Some PowerPC chips designed for embedded applications do not have |
322 | a floating-point unit and therefore do not implement the |
323 | floating-point instructions in the PowerPC instruction set. If you |
324 | say Y here, the kernel will include code to emulate a floating-point |
325 | unit, which will allow programs that use floating-point |
326 | instructions to run. |
327 | |
328 | This is also useful to emulate missing (optional) instructions |
329 | such as fsqrt on cores that do have an FPU but do not implement |
330 | them (such as Freescale BookE). |
331 | |
332 | choice |
333 | prompt "Math emulation options" |
334 | default MATH_EMULATION_FULL |
335 | depends on MATH_EMULATION |
336 | |
337 | config MATH_EMULATION_FULL |
338 | bool "Emulate all the floating point instructions" |
339 | ---help--- |
340 | Select this option will enable the kernel to support to emulate |
341 | all the floating point instructions. If your SoC doesn't have |
342 | a FPU, you should select this. |
343 | |
344 | config MATH_EMULATION_HW_UNIMPLEMENTED |
345 | bool "Just emulate the FPU unimplemented instructions" |
346 | ---help--- |
347 | Select this if you know there does have a hardware FPU on your |
348 | SoC, but some floating point instructions are not implemented by that. |
349 | |
350 | endchoice |
351 | |
352 | config PPC_TRANSACTIONAL_MEM |
353 | bool "Transactional Memory support for POWERPC" |
354 | depends on PPC_BOOK3S_64 |
355 | depends on SMP |
356 | select ALTIVEC |
357 | select VSX |
358 | default n |
359 | ---help--- |
360 | Support user-mode Transactional Memory on POWERPC. |
361 | |
362 | config IOMMU_HELPER |
363 | def_bool PPC64 |
364 | |
365 | config SWIOTLB |
366 | bool "SWIOTLB support" |
367 | default n |
368 | select IOMMU_HELPER |
369 | ---help--- |
370 | Support for IO bounce buffering for systems without an IOMMU. |
371 | This allows us to DMA to the full physical address space on |
372 | platforms where the size of a physical address is larger |
373 | than the bus address. Not all platforms support this. |
374 | |
375 | config HOTPLUG_CPU |
376 | bool "Support for enabling/disabling CPUs" |
377 | depends on SMP && (PPC_PSERIES || \ |
378 | PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC)) |
379 | ---help--- |
380 | Say Y here to be able to disable and re-enable individual |
381 | CPUs at runtime on SMP machines. |
382 | |
383 | Say N if you are unsure. |
384 | |
385 | config ARCH_CPU_PROBE_RELEASE |
386 | def_bool y |
387 | depends on HOTPLUG_CPU |
388 | |
389 | config ARCH_ENABLE_MEMORY_HOTPLUG |
390 | def_bool y |
391 | |
392 | config ARCH_HAS_WALK_MEMORY |
393 | def_bool y |
394 | |
395 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
396 | def_bool y |
397 | |
398 | config PPC64_SUPPORTS_MEMORY_FAILURE |
399 | bool "Add support for memory hwpoison" |
400 | depends on PPC_BOOK3S_64 |
401 | default "y" if PPC_POWERNV |
402 | select ARCH_SUPPORTS_MEMORY_FAILURE |
403 | |
404 | config KEXEC |
405 | bool "kexec system call" |
406 | depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) |
407 | help |
408 | kexec is a system call that implements the ability to shutdown your |
409 | current kernel, and to start another kernel. It is like a reboot |
410 | but it is independent of the system firmware. And like a reboot |
411 | you can start any kernel with it, not just Linux. |
412 | |
413 | The name comes from the similarity to the exec system call. |
414 | |
415 | It is an ongoing process to be certain the hardware in a machine |
416 | is properly shutdown, so do not be surprised if this code does not |
417 | initially work for you. As of this writing the exact hardware |
418 | interface is strongly in flux, so no good recommendation can be |
419 | made. |
420 | |
421 | config CRASH_DUMP |
422 | bool "Build a kdump crash kernel" |
423 | depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP) |
424 | select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE |
425 | help |
426 | Build a kernel suitable for use as a kdump capture kernel. |
427 | The same kernel binary can be used as production kernel and dump |
428 | capture kernel. |
429 | |
430 | config FA_DUMP |
431 | bool "Firmware-assisted dump" |
432 | depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC |
433 | help |
434 | A robust mechanism to get reliable kernel crash dump with |
435 | assistance from firmware. This approach does not use kexec, |
436 | instead firmware assists in booting the kdump kernel |
437 | while preserving memory contents. Firmware-assisted dump |
438 | is meant to be a kdump replacement offering robustness and |
439 | speed not possible without system firmware assistance. |
440 | |
441 | If unsure, say "N" |
442 | |
443 | config IRQ_ALL_CPUS |
444 | bool "Distribute interrupts on all CPUs by default" |
445 | depends on SMP |
446 | help |
447 | This option gives the kernel permission to distribute IRQs across |
448 | multiple CPUs. Saying N here will route all IRQs to the first |
449 | CPU. Generally saying Y is safe, although some problems have been |
450 | reported with SMP Power Macintoshes with this option enabled. |
451 | |
452 | config NUMA |
453 | bool "NUMA support" |
454 | depends on PPC64 |
455 | default y if SMP && PPC_PSERIES |
456 | |
457 | config NODES_SHIFT |
458 | int |
459 | default "8" if PPC64 |
460 | default "4" |
461 | depends on NEED_MULTIPLE_NODES |
462 | |
463 | config USE_PERCPU_NUMA_NODE_ID |
464 | def_bool y |
465 | depends on NUMA |
466 | |
467 | config HAVE_MEMORYLESS_NODES |
468 | def_bool y |
469 | depends on NUMA |
470 | |
471 | config ARCH_SELECT_MEMORY_MODEL |
472 | def_bool y |
473 | depends on PPC64 |
474 | |
475 | config ARCH_FLATMEM_ENABLE |
476 | def_bool y |
477 | depends on (PPC64 && !NUMA) || PPC32 |
478 | |
479 | config ARCH_SPARSEMEM_ENABLE |
480 | def_bool y |
481 | depends on PPC64 |
482 | select SPARSEMEM_VMEMMAP_ENABLE |
483 | |
484 | config ARCH_SPARSEMEM_DEFAULT |
485 | def_bool y |
486 | depends on (SMP && PPC_PSERIES) || PPC_PS3 |
487 | |
488 | config SYS_SUPPORTS_HUGETLBFS |
489 | bool |
490 | |
491 | source "mm/Kconfig" |
492 | |
493 | config ARCH_MEMORY_PROBE |
494 | def_bool y |
495 | depends on MEMORY_HOTPLUG |
496 | |
497 | # Some NUMA nodes have memory ranges that span |
498 | # other nodes. Even though a pfn is valid and |
499 | # between a node's start and end pfns, it may not |
500 | # reside on that node. See memmap_init_zone() |
501 | # for details. |
502 | config NODES_SPAN_OTHER_NODES |
503 | def_bool y |
504 | depends on NEED_MULTIPLE_NODES |
505 | |
506 | config PPC_HAS_HASH_64K |
507 | bool |
508 | depends on PPC64 |
509 | default n |
510 | |
511 | config STDBINUTILS |
512 | bool "Using standard binutils settings" |
513 | depends on 44x |
514 | default y |
515 | help |
516 | Turning this option off allows you to select 256KB PAGE_SIZE on 44x. |
517 | Note, that kernel will be able to run only those applications, |
518 | which had been compiled using binutils later than 2.17.50.0.3 with |
519 | '-zmax-page-size' set to 256K (the default is 64K). Or, if using |
520 | the older binutils, you can patch them with a trivial patch, which |
521 | changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000. |
522 | |
523 | choice |
524 | prompt "Page size" |
525 | default PPC_4K_PAGES |
526 | help |
527 | Select the kernel logical page size. Increasing the page size |
528 | will reduce software overhead at each page boundary, allow |
529 | hardware prefetch mechanisms to be more effective, and allow |
530 | larger dma transfers increasing IO efficiency and reducing |
531 | overhead. However the utilization of memory will increase. |
532 | For example, each cached file will using a multiple of the |
533 | page size to hold its contents and the difference between the |
534 | end of file and the end of page is wasted. |
535 | |
536 | Some dedicated systems, such as software raid serving with |
537 | accelerated calculations, have shown significant increases. |
538 | |
539 | If you configure a 64 bit kernel for 64k pages but the |
540 | processor does not support them, then the kernel will simulate |
541 | them with 4k pages, loading them on demand, but with the |
542 | reduced software overhead and larger internal fragmentation. |
543 | For the 32 bit kernel, a large page option will not be offered |
544 | unless it is supported by the configured processor. |
545 | |
546 | If unsure, choose 4K_PAGES. |
547 | |
548 | config PPC_4K_PAGES |
549 | bool "4k page size" |
550 | |
551 | config PPC_16K_PAGES |
552 | bool "16k page size" if 44x |
553 | |
554 | config PPC_64K_PAGES |
555 | bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64 |
556 | depends on !PPC_FSL_BOOK3E |
557 | select PPC_HAS_HASH_64K if PPC_STD_MMU_64 |
558 | |
559 | config PPC_256K_PAGES |
560 | bool "256k page size" if 44x |
561 | depends on !STDBINUTILS |
562 | help |
563 | Make the page size 256k. |
564 | |
565 | As the ELF standard only requires alignment to support page |
566 | sizes up to 64k, you will need to compile all of your user |
567 | space applications with a non-standard binutils settings |
568 | (see the STDBINUTILS description for details). |
569 | |
570 | Say N unless you know what you are doing. |
571 | |
572 | endchoice |
573 | |
574 | config FORCE_MAX_ZONEORDER |
575 | int "Maximum zone order" |
576 | range 9 64 if PPC64 && PPC_64K_PAGES |
577 | default "9" if PPC64 && PPC_64K_PAGES |
578 | range 13 64 if PPC64 && !PPC_64K_PAGES |
579 | default "13" if PPC64 && !PPC_64K_PAGES |
580 | range 9 64 if PPC32 && PPC_16K_PAGES |
581 | default "9" if PPC32 && PPC_16K_PAGES |
582 | range 7 64 if PPC32 && PPC_64K_PAGES |
583 | default "7" if PPC32 && PPC_64K_PAGES |
584 | range 5 64 if PPC32 && PPC_256K_PAGES |
585 | default "5" if PPC32 && PPC_256K_PAGES |
586 | range 11 64 |
587 | default "11" |
588 | help |
589 | The kernel memory allocator divides physically contiguous memory |
590 | blocks into "zones", where each zone is a power of two number of |
591 | pages. This option selects the largest power of two that the kernel |
592 | keeps in the memory allocator. If you need to allocate very large |
593 | blocks of physically contiguous memory, then you may need to |
594 | increase this value. |
595 | |
596 | This config option is actually maximum order plus one. For example, |
597 | a value of 11 means that the largest free memory block is 2^10 pages. |
598 | |
599 | The page size is not necessarily 4KB. For example, on 64-bit |
600 | systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep |
601 | this in mind when choosing a value for this option. |
602 | |
603 | config PPC_SUBPAGE_PROT |
604 | bool "Support setting protections for 4k subpages" |
605 | depends on PPC_STD_MMU_64 && PPC_64K_PAGES |
606 | help |
607 | This option adds support for a system call to allow user programs |
608 | to set access permissions (read/write, readonly, or no access) |
609 | on the 4k subpages of each 64k page. |
610 | |
611 | config PPC_COPRO_BASE |
612 | bool |
613 | default n |
614 | |
615 | config SCHED_SMT |
616 | bool "SMT (Hyperthreading) scheduler support" |
617 | depends on PPC64 && SMP |
618 | help |
619 | SMT scheduler support improves the CPU scheduler's decision making |
620 | when dealing with POWER5 cpus at a cost of slightly increased |
621 | overhead in some places. If unsure say N here. |
622 | |
623 | config PPC_DENORMALISATION |
624 | bool "PowerPC denormalisation exception handling" |
625 | depends on PPC_BOOK3S_64 |
626 | default "y" if PPC_POWERNV |
627 | ---help--- |
628 | Add support for handling denormalisation of single precision |
629 | values. Useful for bare metal only. If unsure say Y here. |
630 | |
631 | config CMDLINE_BOOL |
632 | bool "Default bootloader kernel arguments" |
633 | |
634 | config CMDLINE |
635 | string "Initial kernel command string" |
636 | depends on CMDLINE_BOOL |
637 | default "console=ttyS0,9600 console=tty0 root=/dev/sda2" |
638 | help |
639 | On some platforms, there is currently no way for the boot loader to |
640 | pass arguments to the kernel. For these platforms, you can supply |
641 | some command-line options at build time by entering them here. In |
642 | most cases you will need to specify the root device here. |
643 | |
644 | config CMDLINE_FORCE |
645 | bool "Always use the default kernel command string" |
646 | depends on CMDLINE_BOOL |
647 | help |
648 | Always use the default kernel command string, even if the boot |
649 | loader passes other arguments to the kernel. |
650 | This is useful if you cannot or don't want to change the |
651 | command-line options your boot loader passes to the kernel. |
652 | |
653 | config EXTRA_TARGETS |
654 | string "Additional default image types" |
655 | help |
656 | List additional targets to be built by the bootwrapper here (separated |
657 | by spaces). This is useful for targets that depend of device tree |
658 | files in the .dts directory. |
659 | |
660 | Targets in this list will be build as part of the default build |
661 | target, or when the user does a 'make zImage' or a |
662 | 'make zImage.initrd'. |
663 | |
664 | If unsure, leave blank |
665 | |
666 | config ARCH_WANTS_FREEZER_CONTROL |
667 | def_bool y |
668 | depends on ADB_PMU |
669 | |
670 | source kernel/power/Kconfig |
671 | |
672 | config SECCOMP |
673 | bool "Enable seccomp to safely compute untrusted bytecode" |
674 | depends on PROC_FS |
675 | default y |
676 | help |
677 | This kernel feature is useful for number crunching applications |
678 | that may need to compute untrusted bytecode during their |
679 | execution. By using pipes or other transports made available to |
680 | the process as file descriptors supporting the read/write |
681 | syscalls, it's possible to isolate those applications in |
682 | their own address space using seccomp. Once seccomp is |
683 | enabled via /proc/<pid>/seccomp, it cannot be disabled |
684 | and the task is only allowed to execute a few safe syscalls |
685 | defined by each seccomp mode. |
686 | |
687 | If unsure, say Y. Only embedded should say N here. |
688 | |
689 | endmenu |
690 | |
691 | config ISA_DMA_API |
692 | bool |
693 | default PCI |
694 | |
695 | menu "Bus options" |
696 | |
697 | config ISA |
698 | bool "Support for ISA-bus hardware" |
699 | depends on PPC_CHRP |
700 | select PPC_I8259 |
701 | help |
702 | Find out whether you have ISA slots on your motherboard. ISA is the |
703 | name of a bus system, i.e. the way the CPU talks to the other stuff |
704 | inside your box. If you have an Apple machine, say N here; if you |
705 | have an IBM RS/6000 or pSeries machine, say Y. If you have an |
706 | embedded board, consult your board documentation. |
707 | |
708 | config ZONE_DMA |
709 | bool |
710 | default y |
711 | |
712 | config NEED_DMA_MAP_STATE |
713 | def_bool (PPC64 || NOT_COHERENT_CACHE) |
714 | |
715 | config NEED_SG_DMA_LENGTH |
716 | def_bool y |
717 | |
718 | config GENERIC_ISA_DMA |
719 | bool |
720 | depends on ISA_DMA_API |
721 | default y |
722 | |
723 | config PPC_INDIRECT_PCI |
724 | bool |
725 | depends on PCI |
726 | default y if 40x || 44x |
727 | default n |
728 | |
729 | config EISA |
730 | bool |
731 | |
732 | config SBUS |
733 | bool |
734 | |
735 | config FSL_SOC |
736 | bool |
737 | |
738 | config FSL_PCI |
739 | bool |
740 | select PPC_INDIRECT_PCI |
741 | select PCI_QUIRKS |
742 | |
743 | config FSL_PMC |
744 | bool |
745 | default y |
746 | depends on SUSPEND && (PPC_85xx || PPC_86xx) |
747 | help |
748 | Freescale MPC85xx/MPC86xx power management controller support |
749 | (suspend/resume). For MPC83xx see platforms/83xx/suspend.c |
750 | |
751 | config PPC4xx_CPM |
752 | bool |
753 | default y |
754 | depends on SUSPEND && (44x || 40x) |
755 | help |
756 | PPC4xx Clock Power Management (CPM) support (suspend/resume). |
757 | It also enables support for two different idle states (idle-wait |
758 | and idle-doze). |
759 | |
760 | config 4xx_SOC |
761 | bool |
762 | |
763 | config FSL_LBC |
764 | bool "Freescale Local Bus support" |
765 | depends on FSL_SOC |
766 | help |
767 | Enables reporting of errors from the Freescale local bus |
768 | controller. Also contains some common code used by |
769 | drivers for specific local bus peripherals. |
770 | |
771 | config FSL_GTM |
772 | bool |
773 | depends on PPC_83xx || QUICC_ENGINE || CPM2 |
774 | help |
775 | Freescale General-purpose Timers support |
776 | |
777 | # Yes MCA RS/6000s exist but Linux-PPC does not currently support any |
778 | config MCA |
779 | bool |
780 | |
781 | # Platforms that what PCI turned unconditionally just do select PCI |
782 | # in their config node. Platforms that want to choose at config |
783 | # time should select PPC_PCI_CHOICE |
784 | config PPC_PCI_CHOICE |
785 | bool |
786 | |
787 | config PCI |
788 | bool "PCI support" if PPC_PCI_CHOICE |
789 | default y if !40x && !CPM2 && !8xx && !PPC_83xx \ |
790 | && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON |
791 | default PCI_QSPAN if !4xx && !CPM2 && 8xx |
792 | select GENERIC_PCI_IOMAP |
793 | help |
794 | Find out whether your system includes a PCI bus. PCI is the name of |
795 | a bus system, i.e. the way the CPU talks to the other stuff inside |
796 | your box. If you say Y here, the kernel will include drivers and |
797 | infrastructure code to support PCI bus devices. |
798 | |
799 | config PCI_DOMAINS |
800 | def_bool PCI |
801 | |
802 | config PCI_SYSCALL |
803 | def_bool PCI |
804 | |
805 | config PCI_QSPAN |
806 | bool "QSpan PCI" |
807 | depends on !4xx && !CPM2 && 8xx |
808 | select PPC_I8259 |
809 | help |
810 | Say Y here if you have a system based on a Motorola 8xx-series |
811 | embedded processor with a QSPAN PCI interface, otherwise say N. |
812 | |
813 | config PCI_8260 |
814 | bool |
815 | depends on PCI && 8260 |
816 | select PPC_INDIRECT_PCI |
817 | default y |
818 | |
819 | source "drivers/pci/pcie/Kconfig" |
820 | |
821 | source "drivers/pci/Kconfig" |
822 | |
823 | source "drivers/pcmcia/Kconfig" |
824 | |
825 | source "drivers/pci/hotplug/Kconfig" |
826 | |
827 | config HAS_RAPIDIO |
828 | bool |
829 | default n |
830 | |
831 | config RAPIDIO |
832 | tristate "RapidIO support" |
833 | depends on HAS_RAPIDIO || PCI |
834 | help |
835 | If you say Y here, the kernel will include drivers and |
836 | infrastructure code to support RapidIO interconnect devices. |
837 | |
838 | config FSL_RIO |
839 | bool "Freescale Embedded SRIO Controller support" |
840 | depends on RAPIDIO = y && HAS_RAPIDIO |
841 | default "n" |
842 | ---help--- |
843 | Include support for RapidIO controller on Freescale embedded |
844 | processors (MPC8548, MPC8641, etc). |
845 | |
846 | source "drivers/rapidio/Kconfig" |
847 | |
848 | endmenu |
849 | |
850 | config NONSTATIC_KERNEL |
851 | bool |
852 | default n |
853 | |
854 | menu "Advanced setup" |
855 | depends on PPC32 |
856 | |
857 | config ADVANCED_OPTIONS |
858 | bool "Prompt for advanced kernel configuration options" |
859 | help |
860 | This option will enable prompting for a variety of advanced kernel |
861 | configuration options. These options can cause the kernel to not |
862 | work if they are set incorrectly, but can be used to optimize certain |
863 | aspects of kernel memory management. |
864 | |
865 | Unless you know what you are doing, say N here. |
866 | |
867 | comment "Default settings for advanced configuration options are used" |
868 | depends on !ADVANCED_OPTIONS |
869 | |
870 | config LOWMEM_SIZE_BOOL |
871 | bool "Set maximum low memory" |
872 | depends on ADVANCED_OPTIONS |
873 | help |
874 | This option allows you to set the maximum amount of memory which |
875 | will be used as "low memory", that is, memory which the kernel can |
876 | access directly, without having to set up a kernel virtual mapping. |
877 | This can be useful in optimizing the layout of kernel virtual |
878 | memory. |
879 | |
880 | Say N here unless you know what you are doing. |
881 | |
882 | config LOWMEM_SIZE |
883 | hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL |
884 | default "0x30000000" |
885 | |
886 | config LOWMEM_CAM_NUM_BOOL |
887 | bool "Set number of CAMs to use to map low memory" |
888 | depends on ADVANCED_OPTIONS && FSL_BOOKE |
889 | help |
890 | This option allows you to set the maximum number of CAM slots that |
891 | will be used to map low memory. There are a limited number of slots |
892 | available and even more limited number that will fit in the L1 MMU. |
893 | However, using more entries will allow mapping more low memory. This |
894 | can be useful in optimizing the layout of kernel virtual memory. |
895 | |
896 | Say N here unless you know what you are doing. |
897 | |
898 | config LOWMEM_CAM_NUM |
899 | depends on FSL_BOOKE |
900 | int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL |
901 | default 3 |
902 | |
903 | config DYNAMIC_MEMSTART |
904 | bool "Enable page aligned dynamic load address for kernel" |
905 | depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x) |
906 | select NONSTATIC_KERNEL |
907 | help |
908 | This option enables the kernel to be loaded at any page aligned |
909 | physical address. The kernel creates a mapping from KERNELBASE to |
910 | the address where the kernel is loaded. The page size here implies |
911 | the TLB page size of the mapping for kernel on the particular platform. |
912 | Please refer to the init code for finding the TLB page size. |
913 | |
914 | DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE |
915 | kernel image, where the only restriction is the page aligned kernel |
916 | load address. When this option is enabled, the compile time physical |
917 | address CONFIG_PHYSICAL_START is ignored. |
918 | |
919 | This option is overridden by CONFIG_RELOCATABLE |
920 | |
921 | config RELOCATABLE |
922 | bool "Build a relocatable kernel" |
923 | depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE) |
924 | select NONSTATIC_KERNEL |
925 | help |
926 | This builds a kernel image that is capable of running at the |
927 | location the kernel is loaded at, without any alignment restrictions. |
928 | This feature is a superset of DYNAMIC_MEMSTART and hence overrides it. |
929 | |
930 | One use is for the kexec on panic case where the recovery kernel |
931 | must live at a different physical address than the primary |
932 | kernel. |
933 | |
934 | Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address |
935 | it has been loaded at and the compile time physical addresses |
936 | CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START |
937 | setting can still be useful to bootwrappers that need to know the |
938 | load address of the kernel (eg. u-boot/mkimage). |
939 | |
940 | config RELOCATABLE_PPC32 |
941 | def_bool y |
942 | depends on PPC32 && RELOCATABLE |
943 | |
944 | config PAGE_OFFSET_BOOL |
945 | bool "Set custom page offset address" |
946 | depends on ADVANCED_OPTIONS |
947 | help |
948 | This option allows you to set the kernel virtual address at which |
949 | the kernel will map low memory. This can be useful in optimizing |
950 | the virtual memory layout of the system. |
951 | |
952 | Say N here unless you know what you are doing. |
953 | |
954 | config PAGE_OFFSET |
955 | hex "Virtual address of memory base" if PAGE_OFFSET_BOOL |
956 | default "0xc0000000" |
957 | |
958 | config KERNEL_START_BOOL |
959 | bool "Set custom kernel base address" |
960 | depends on ADVANCED_OPTIONS |
961 | help |
962 | This option allows you to set the kernel virtual address at which |
963 | the kernel will be loaded. Normally this should match PAGE_OFFSET |
964 | however there are times (like kdump) that one might not want them |
965 | to be the same. |
966 | |
967 | Say N here unless you know what you are doing. |
968 | |
969 | config KERNEL_START |
970 | hex "Virtual address of kernel base" if KERNEL_START_BOOL |
971 | default PAGE_OFFSET if PAGE_OFFSET_BOOL |
972 | default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL |
973 | default "0xc0000000" |
974 | |
975 | config PHYSICAL_START_BOOL |
976 | bool "Set physical address where the kernel is loaded" |
977 | depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE |
978 | help |
979 | This gives the physical address where the kernel is loaded. |
980 | |
981 | Say N here unless you know what you are doing. |
982 | |
983 | config PHYSICAL_START |
984 | hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL |
985 | default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL |
986 | default "0x00000000" |
987 | |
988 | config PHYSICAL_ALIGN |
989 | hex |
990 | default "0x04000000" if FSL_BOOKE |
991 | help |
992 | This value puts the alignment restrictions on physical address |
993 | where kernel is loaded and run from. Kernel is compiled for an |
994 | address which meets above alignment restriction. |
995 | |
996 | config TASK_SIZE_BOOL |
997 | bool "Set custom user task size" |
998 | depends on ADVANCED_OPTIONS |
999 | help |
1000 | This option allows you to set the amount of virtual address space |
1001 | allocated to user tasks. This can be useful in optimizing the |
1002 | virtual memory layout of the system. |
1003 | |
1004 | Say N here unless you know what you are doing. |
1005 | |
1006 | config TASK_SIZE |
1007 | hex "Size of user task space" if TASK_SIZE_BOOL |
1008 | default "0x80000000" if PPC_8xx |
1009 | default "0xc0000000" |
1010 | |
1011 | config CONSISTENT_SIZE_BOOL |
1012 | bool "Set custom consistent memory pool size" |
1013 | depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE |
1014 | help |
1015 | This option allows you to set the size of the |
1016 | consistent memory pool. This pool of virtual memory |
1017 | is used to make consistent memory allocations. |
1018 | |
1019 | config CONSISTENT_SIZE |
1020 | hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL |
1021 | default "0x00200000" if NOT_COHERENT_CACHE |
1022 | |
1023 | config PIN_TLB |
1024 | bool "Pinned Kernel TLBs (860 ONLY)" |
1025 | depends on ADVANCED_OPTIONS && 8xx |
1026 | endmenu |
1027 | |
1028 | if PPC64 |
1029 | config RELOCATABLE |
1030 | bool "Build a relocatable kernel" |
1031 | depends on !COMPILE_TEST |
1032 | select NONSTATIC_KERNEL |
1033 | help |
1034 | This builds a kernel image that is capable of running anywhere |
1035 | in the RMA (real memory area) at any 16k-aligned base address. |
1036 | The kernel is linked as a position-independent executable (PIE) |
1037 | and contains dynamic relocations which are processed early |
1038 | in the bootup process. |
1039 | |
1040 | One use is for the kexec on panic case where the recovery kernel |
1041 | must live at a different physical address than the primary |
1042 | kernel. |
1043 | |
1044 | # This value must have zeroes in the bottom 60 bits otherwise lots will break |
1045 | config PAGE_OFFSET |
1046 | hex |
1047 | default "0xc000000000000000" |
1048 | config KERNEL_START |
1049 | hex |
1050 | default "0xc000000000000000" |
1051 | config PHYSICAL_START |
1052 | hex |
1053 | default "0x00000000" |
1054 | endif |
1055 | |
1056 | config ARCH_RANDOM |
1057 | def_bool n |
1058 | |
1059 | source "net/Kconfig" |
1060 | |
1061 | source "drivers/Kconfig" |
1062 | |
1063 | source "fs/Kconfig" |
1064 | |
1065 | source "arch/powerpc/sysdev/qe_lib/Kconfig" |
1066 | |
1067 | source "lib/Kconfig" |
1068 | |
1069 | source "arch/powerpc/Kconfig.debug" |
1070 | |
1071 | source "security/Kconfig" |
1072 | |
1073 | config KEYS_COMPAT |
1074 | bool |
1075 | depends on COMPAT && KEYS |
1076 | default y |
1077 | |
1078 | source "crypto/Kconfig" |
1079 | |
1080 | config PPC_LIB_RHEAP |
1081 | bool |
1082 | |
1083 | source "arch/powerpc/kvm/Kconfig" |
1084 |
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