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Paul Mackerras14cf11a2005-09-26 16:04:21 +10001# For a description of the syntax of this configuration file,
2# see Documentation/kbuild/kconfig-language.txt.
3#
4
5mainmenu "Linux/PowerPC Kernel Configuration"
6
Arnd Bergmanna0ae9c72007-06-13 02:30:17 +10007source "arch/powerpc/platforms/Kconfig.cputype"
Johannes Berg17e638b2007-03-19 11:53:53 +01008
Paul Mackerras14cf11a2005-09-26 16:04:21 +10009config PPC32
10 bool
11 default y if !PPC64
12
13config 64BIT
14 bool
15 default y if PPC64
16
Stephen Rothwell2578bfa2007-09-21 10:16:20 +100017config WORD_SIZE
18 int
19 default 64 if PPC64
20 default 32 if !PPC64
21
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -070022config ARCH_PHYS_ADDR_T_64BIT
23 def_bool PPC64 || PHYS_64BIT
24
Paul Mackerras14cf11a2005-09-26 16:04:21 +100025config MMU
26 bool
27 default y
28
Tony Breedsaa3be5f2007-09-21 13:26:02 +100029config GENERIC_CMOS_UPDATE
30 def_bool y
31
Tony Breeds4a4cfe32007-09-22 07:35:52 +100032config GENERIC_TIME
33 def_bool y
34
35config GENERIC_TIME_VSYSCALL
36 def_bool y
37
Tony Breedsd831d0b2007-09-21 13:26:03 +100038config GENERIC_CLOCKEVENTS
39 def_bool y
40
Paul Mackerras14cf11a2005-09-26 16:04:21 +100041config GENERIC_HARDIRQS
42 bool
43 default y
44
Michael Ellerman8e27f4d2009-04-22 15:31:45 +000045config GENERIC_HARDIRQS_NO__DO_IRQ
46 bool
47 default y
48
travis@sgi.com988c3882008-01-30 23:27:58 +010049config HAVE_SETUP_PER_CPU_AREA
travis@sgi.comb32ef632008-01-30 13:32:51 +010050 def_bool PPC64
51
Ingo Molnar0d7012a2006-06-29 02:24:43 -070052config IRQ_PER_CPU
53 bool
54 default y
55
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100056config STACKTRACE_SUPPORT
57 bool
58 default y
59
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100060config HAVE_LATENCYTOP_SUPPORT
61 def_bool y
62
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100063config TRACE_IRQFLAGS_SUPPORT
64 bool
65 depends on PPC64
66 default y
67
68config LOCKDEP_SUPPORT
69 bool
70 default y
71
Paul Mackerras14cf11a2005-09-26 16:04:21 +100072config RWSEM_GENERIC_SPINLOCK
73 bool
74
75config RWSEM_XCHGADD_ALGORITHM
76 bool
77 default y
78
Nick Piggin95c354f2008-01-30 13:31:20 +010079config GENERIC_LOCKBREAK
80 bool
81 default y
82 depends on SMP && PREEMPT
83
David Howellsf0d1b0b2006-12-08 02:37:49 -080084config ARCH_HAS_ILOG2_U32
85 bool
David Howellsef55d532006-12-08 02:37:53 -080086 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080087
88config ARCH_HAS_ILOG2_U64
89 bool
David Howellsef55d532006-12-08 02:37:53 -080090 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080091
Akinobu Mitae779b2f2006-03-26 01:39:33 -080092config GENERIC_HWEIGHT
93 bool
94 default y
95
Paul Mackerras14cf11a2005-09-26 16:04:21 +100096config GENERIC_CALIBRATE_DELAY
97 bool
98 default y
99
Jon Mason0a9cb462006-05-19 15:35:32 -0500100config GENERIC_FIND_NEXT_BIT
101 bool
102 default y
103
Anton Vorontsovb7ce3412008-04-11 23:06:36 +1000104config GENERIC_GPIO
105 bool
106 help
107 Generic GPIO API support
108
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700109config ARCH_NO_VIRT_TO_BUS
110 def_bool PPC64
111
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000112config PPC
113 bool
114 default y
Steven Rostedt2b79d692009-01-06 18:49:17 +0000115 select HAVE_FTRACE_MCOUNT_RECORD
116 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400117 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500118 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700119 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100120 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700121 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700122 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500123 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500124 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800125 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000126 select HAVE_ARCH_TRACEHOOK
David S. Millerd9b2b2a2008-02-13 16:56:49 -0800127 select HAVE_LMB
Takashi Iwai7ff86b02008-07-16 02:20:11 +0200128 select HAVE_DMA_ATTRS if PPC64
Jens Axboeb7d7a242008-06-26 11:22:13 +0200129 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400130 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100131 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000132
133config EARLY_PRINTK
134 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100135 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000136
137config COMPAT
138 bool
139 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800140 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000141
142config SYSVIPC_COMPAT
143 bool
144 depends on COMPAT && SYSVIPC
145 default y
146
147# All PPC32s use generic nvram driver through ppc_md
148config GENERIC_NVRAM
149 bool
150 default y if PPC32
151
Ingo Molnarae1e9132008-11-11 09:05:16 +0100152config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000153 bool
154 default y
155
156config ARCH_MAY_HAVE_PC_FDC
157 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100158 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000159
Kumar Gala08264cb2006-01-10 21:43:56 -0600160config PPC_OF
161 def_bool y
162
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000163config OF
164 def_bool y
165
Kumar Gala08264cb2006-01-10 21:43:56 -0600166config PPC_UDBG_16550
167 bool
168 default n
169
Kumar Gala08264cb2006-01-10 21:43:56 -0600170config GENERIC_TBSYNC
171 bool
172 default y if PPC32 && SMP
173 default n
174
Al Viroe65e1fc2006-09-12 03:04:40 -0400175config AUDIT_ARCH
176 bool
177 default y
178
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800179config GENERIC_BUG
180 bool
181 default y
182 depends on BUG
183
Johannes Bergb3028872007-03-20 05:18:02 +1100184config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500185 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100186 bool
187
David Gibson9fffb552009-04-30 15:25:53 +1000188config DTC
189 bool
190 default y
191
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600192config DEFAULT_UIMAGE
193 bool
194 help
195 Used to allow a board to specify it wants a uImage built by default
196 default n
197
Scott Woodb09c1642008-01-17 16:31:40 -0600198config REDBOOT
199 bool
200
Johannes Berg801e4062007-12-08 02:12:39 +0100201config HIBERNATE_32
Johannes Berg543b9fd2007-05-03 22:31:38 +1000202 bool
Johannes Berg801e4062007-12-08 02:12:39 +0100203 depends on (PPC_PMAC && !SMP) || BROKEN
204 default y
205
206config HIBERNATE_64
207 bool
208 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
209 default y
210
211config ARCH_HIBERNATION_POSSIBLE
212 bool
213 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
Johannes Berg543b9fd2007-05-03 22:31:38 +1000214 default y
215
Johannes Bergf4cb5702007-12-08 02:14:00 +0100216config ARCH_SUSPEND_POSSIBLE
217 def_bool y
Scott Woodd49747b2007-10-09 12:37:13 -0500218 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100219
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100220config PPC_DCR_NATIVE
221 bool
222 default n
223
224config PPC_DCR_MMIO
225 bool
226 default n
227
228config PPC_DCR
229 bool
230 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
231 default y
232
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100233config PPC_OF_PLATFORM_PCI
234 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100235 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100236 depends on PPC64 # not supported on 32 bits yet
237 default n
238
Akinobu Mita6a11f752009-03-31 15:23:17 -0700239config ARCH_SUPPORTS_DEBUG_PAGEALLOC
240 def_bool y
241
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000242source "init/Kconfig"
243
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700244source "kernel/Kconfig.freezer"
245
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100246source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500247source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000248
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000249menu "Kernel options"
250
251config HIGHMEM
252 bool "High memory support"
253 depends on PPC32
254
Tony Breeds1ad74992007-09-21 13:26:03 +1000255source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000256source kernel/Kconfig.hz
257source kernel/Kconfig.preempt
258source "fs/Kconfig.binfmt"
259
Mel Gormanba72cb82007-11-28 16:21:13 -0800260config HUGETLB_PAGE_SIZE_VARIABLE
261 bool
262 depends on HUGETLB_PAGE
263 default y
264
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000265config MATH_EMULATION
266 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600267 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000268 ---help---
269 Some PowerPC chips designed for embedded applications do not have
270 a floating-point unit and therefore do not implement the
271 floating-point instructions in the PowerPC instruction set. If you
272 say Y here, the kernel will include code to emulate a floating-point
273 unit, which will allow programs that use floating-point
274 instructions to run.
275
Scott Wood5dd57a12007-09-18 15:29:35 -0500276config 8XX_MINIMAL_FPEMU
277 bool "Minimal math emulation for 8xx"
278 depends on 8xx && !MATH_EMULATION
279 help
280 Older arch/ppc kernels still emulated a few floating point
281 instructions such as load and store, even when full math
282 emulation is disabled. Say "Y" here if you want to preserve
283 this behavior.
284
285 It is recommended that you build a soft-float userspace instead.
286
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000287config IOMMU_VMERGE
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000288 bool "Enable IOMMU virtual merging"
289 depends on PPC64
290 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000291 help
292 Cause IO segments sent to a device for DMA to be merged virtually
293 by the IOMMU when they happen to have been allocated contiguously.
294 This doesn't add pressure to the IOMMU allocator. However, some
295 drivers don't support getting large merged segments coming back
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000296 from *_map_sg().
297
298 Most drivers don't have this problem; it is safe to say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000299
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800300config IOMMU_HELPER
301 def_bool PPC64
302
Becky Bruce15e09c02008-11-20 06:49:16 +0000303config PPC_NEED_DMA_SYNC_OPS
304 def_bool y
305 depends on NOT_COHERENT_CACHE
306
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000307config HOTPLUG_CPU
308 bool "Support for enabling/disabling CPUs"
309 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
310 ---help---
311 Say Y here to be able to disable and re-enable individual
312 CPUs at runtime on SMP machines.
313
314 Say N if you are unsure.
315
Yasunori Gotocc576372006-06-29 02:24:27 -0700316config ARCH_ENABLE_MEMORY_HOTPLUG
317 def_bool y
318
Badari Pulavartya99824f2008-02-05 00:10:18 -0800319config ARCH_HAS_WALK_MEMORY
320 def_bool y
321
Badari Pulavarty14824712008-02-05 00:10:17 -0800322config ARCH_ENABLE_MEMORY_HOTREMOVE
323 def_bool y
324
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000325config KEXEC
326 bool "kexec system call (EXPERIMENTAL)"
Geert Uytterhoevencb93d562009-04-02 06:25:41 +0000327 depends on PPC_BOOK3S && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000328 help
329 kexec is a system call that implements the ability to shutdown your
330 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400331 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000332 you can start any kernel with it, not just Linux.
333
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400334 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000335
336 It is an ongoing process to be certain the hardware in a machine
337 is properly shutdown, so do not be surprised if this code does not
338 initially work for you. It may help to enable device hotplugging
339 support. As of this writing the exact hardware interface is
340 strongly in flux, so no good recommendation can be made.
341
Haren Mynenie8625d462006-01-14 13:48:25 -0800342config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000343 bool "Build a kdump crash kernel"
Mohan Kumar Mc6ac71a2009-01-06 00:23:01 +0000344 depends on PPC64 || 6xx
345 select RELOCATABLE if PPC64
Haren Mynenie8625d462006-01-14 13:48:25 -0800346 help
347 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000348 The same kernel binary can be used as production kernel and dump
349 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800350
Manish Ahuja242f2712008-03-22 10:50:50 +1100351config PHYP_DUMP
352 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
353 depends on PPC_PSERIES && EXPERIMENTAL
354 help
355 Hypervisor-assisted dump is meant to be a kdump replacement
356 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100357 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100358
359 If unsure, say "N"
360
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000361config PPCBUG_NVRAM
362 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
363 default y if PPC_PREP
364
365config IRQ_ALL_CPUS
366 bool "Distribute interrupts on all CPUs by default"
367 depends on SMP && !MV64360
368 help
369 This option gives the kernel permission to distribute IRQs across
370 multiple CPUs. Saying N here will route all IRQs to the first
371 CPU. Generally saying Y is safe, although some problems have been
372 reported with SMP Power Macintoshes with this option enabled.
373
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700374config NUMA
375 bool "NUMA support"
376 depends on PPC64
377 default y if SMP && PPC_PSERIES
378
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700379config NODES_SHIFT
380 int
381 default "4"
382 depends on NEED_MULTIPLE_NODES
383
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000384config ARCH_SELECT_MEMORY_MODEL
385 def_bool y
386 depends on PPC64
387
388config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000389 def_bool y
390 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000391
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000392config ARCH_SPARSEMEM_ENABLE
393 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000394 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700395 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100396
397config ARCH_SPARSEMEM_DEFAULT
398 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100399 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000400
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700401config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000402 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700403
404source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000405
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800406config ARCH_MEMORY_PROBE
407 def_bool y
408 depends on MEMORY_HOTPLUG
409
Andy Whitcroft75167952006-10-21 10:24:14 -0700410# Some NUMA nodes have memory ranges that span
411# other nodes. Even though a pfn is valid and
412# between a node's start and end pfns, it may not
413# reside on that node. See memmap_init_zone()
414# for details.
415config NODES_SPAN_OTHER_NODES
416 def_bool y
417 depends on NEED_MULTIPLE_NODES
418
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000419config PPC_HAS_HASH_64K
420 bool
421 depends on PPC64
422 default n
423
Yuri Tikhonove1240122009-01-29 01:40:44 +0000424config STDBINUTILS
425 bool "Using standard binutils settings"
426 depends on 44x
427 default y
428 help
429 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
430 Note, that kernel will be able to run only those applications,
431 which had been compiled using binutils later than 2.17.50.0.3 with
432 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
433 the older binutils, you can patch them with a trivial patch, which
434 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
435
Ilya Yanokca9153a2008-12-11 04:55:41 +0300436choice
437 prompt "Page size"
438 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100439 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300440 Select the kernel logical page size. Increasing the page size
441 will reduce software overhead at each page boundary, allow
442 hardware prefetch mechanisms to be more effective, and allow
443 larger dma transfers increasing IO efficiency and reducing
444 overhead. However the utilization of memory will increase.
445 For example, each cached file will using a multiple of the
446 page size to hold its contents and the difference between the
447 end of file and the end of page is wasted.
448
449 Some dedicated systems, such as software raid serving with
450 accelerated calculations, have shown significant increases.
451
452 If you configure a 64 bit kernel for 64k pages but the
453 processor does not support them, then the kernel will simulate
454 them with 4k pages, loading them on demand, but with the
455 reduced software overhead and larger internal fragmentation.
456 For the 32 bit kernel, a large page option will not be offered
457 unless it is supported by the configured processor.
458
459 If unsure, choose 4K_PAGES.
460
461config PPC_4K_PAGES
462 bool "4k page size"
463
464config PPC_16K_PAGES
465 bool "16k page size" if 44x
466
467config PPC_64K_PAGES
468 bool "64k page size" if 44x || PPC_STD_MMU_64
469 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
470
Yuri Tikhonove1240122009-01-29 01:40:44 +0000471config PPC_256K_PAGES
472 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000473 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000474 help
475 Make the page size 256k.
476
477 As the ELF standard only requires alignment to support page
478 sizes up to 64k, you will need to compile all of your user
479 space applications with a non-standard binutils settings
480 (see the STDBINUTILS description for details).
481
482 Say N unless you know what you are doing.
483
Ilya Yanokca9153a2008-12-11 04:55:41 +0300484endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100485
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000486config FORCE_MAX_ZONEORDER
487 int "Maximum zone order"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300488 range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
489 default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
490 range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
491 default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
492 range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
493 default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
494 range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
495 default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
Yuri Tikhonove1240122009-01-29 01:40:44 +0000496 range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
497 default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000498 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000499 default "11"
500 help
501 The kernel memory allocator divides physically contiguous memory
502 blocks into "zones", where each zone is a power of two number of
503 pages. This option selects the largest power of two that the kernel
504 keeps in the memory allocator. If you need to allocate very large
505 blocks of physically contiguous memory, then you may need to
506 increase this value.
507
508 This config option is actually maximum order plus one. For example,
509 a value of 11 means that the largest free memory block is 2^10 pages.
510
511 The page size is not necessarily 4KB. For example, on 64-bit
512 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
513 this in mind when choosing a value for this option.
514
Paul Mackerrasfa282372008-01-24 08:35:13 +1100515config PPC_SUBPAGE_PROT
516 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300517 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100518 help
519 This option adds support for a system call to allow user programs
520 to set access permissions (read/write, readonly, or no access)
521 on the 4k subpages of each 64k page.
522
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000523config SCHED_SMT
524 bool "SMT (Hyperthreading) scheduler support"
525 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000526 help
527 SMT scheduler support improves the CPU scheduler's decision making
528 when dealing with POWER5 cpus at a cost of slightly increased
529 overhead in some places. If unsure say N here.
530
531config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000532 bool "Support for device tree in /proc"
533 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000534 help
535 This option adds a device-tree directory under /proc which contains
536 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000537 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000538
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000539config CMDLINE_BOOL
540 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000541
542config CMDLINE
543 string "Initial kernel command string"
544 depends on CMDLINE_BOOL
545 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
546 help
547 On some platforms, there is currently no way for the boot loader to
548 pass arguments to the kernel. For these platforms, you can supply
549 some command-line options at build time by entering them here. In
550 most cases you will need to specify the root device here.
551
Grant Likelyc356aa42008-07-09 09:41:52 -0600552config EXTRA_TARGETS
553 string "Additional default image types"
554 help
555 List additional targets to be built by the bootwrapper here (separated
556 by spaces). This is useful for targets that depend of device tree
557 files in the .dts directory.
558
559 Targets in this list will be build as part of the default build
560 target, or when the user does a 'make zImage' or a
561 'make zImage.initrd'.
562
563 If unsure, leave blank
564
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000565if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500566config ARCH_WANTS_FREEZER_CONTROL
567 def_bool y
568 depends on ADB_PMU
569
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000570source kernel/power/Kconfig
571endif
572
573config SECCOMP
574 bool "Enable seccomp to safely compute untrusted bytecode"
575 depends on PROC_FS
576 default y
577 help
578 This kernel feature is useful for number crunching applications
579 that may need to compute untrusted bytecode during their
580 execution. By using pipes or other transports made available to
581 the process as file descriptors supporting the read/write
582 syscalls, it's possible to isolate those applications in
583 their own address space using seccomp. Once seccomp is
584 enabled via /proc/<pid>/seccomp, it cannot be disabled
585 and the task is only allowed to execute a few safe syscalls
586 defined by each seccomp mode.
587
588 If unsure, say Y. Only embedded should say N here.
589
590endmenu
591
592config ISA_DMA_API
593 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100594 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000595
596menu "Bus options"
597
598config ISA
599 bool "Support for ISA-bus hardware"
600 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000601 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000602 help
603 Find out whether you have ISA slots on your motherboard. ISA is the
604 name of a bus system, i.e. the way the CPU talks to the other stuff
605 inside your box. If you have an Apple machine, say N here; if you
606 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
607 you have an embedded board, consult your board documentation.
608
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800609config ZONE_DMA
610 bool
611 default y
612
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000613config GENERIC_ISA_DMA
614 bool
615 depends on PPC64 || POWER4 || 6xx && !CPM2
616 default y
617
Paul Mackerras25635c72005-10-26 16:36:55 +1000618config PPC_INDIRECT_PCI
619 bool
620 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600621 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000622 default n
623
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000624config EISA
625 bool
626
627config SBUS
628 bool
629
Kumar Gala08264cb2006-01-10 21:43:56 -0600630config FSL_SOC
631 bool
632
Roy Zang55c44992007-07-10 18:44:34 +0800633config FSL_PCI
634 bool
635 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600636 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800637
Stefan Roese2a706912008-03-26 22:39:50 +1100638config 4xx_SOC
639 bool
640
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400641config FSL_LBC
642 bool
643 help
644 Freescale Localbus support
645
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400646config FSL_GTM
647 bool
648 depends on PPC_83xx || QUICC_ENGINE || CPM2
649 help
650 Freescale General-purpose Timers support
651
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000652# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
653config MCA
654 bool
655
John Rigbyb5005632008-06-26 11:07:56 -0600656# Platforms that what PCI turned unconditionally just do select PCI
657# in their config node. Platforms that want to choose at config
658# time should select PPC_PCI_CHOICE
659config PPC_PCI_CHOICE
660 bool
661
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000662config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600663 bool "PCI support" if PPC_PCI_CHOICE
664 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Jon Loeliger53158622006-08-09 10:37:28 -0500665 && !PPC_85xx && !PPC_86xx
David Gibsonf21f49e2007-06-13 14:52:54 +1000666 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000667 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000668 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000669 help
670 Find out whether your system includes a PCI bus. PCI is the name of
671 a bus system, i.e. the way the CPU talks to the other stuff inside
672 your box. If you say Y here, the kernel will include drivers and
673 infrastructure code to support PCI bus devices.
674
675config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600676 def_bool PCI
677
678config PCI_SYSCALL
679 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000680
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000681config PCI_QSPAN
682 bool "QSpan PCI"
683 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000684 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000685 help
686 Say Y here if you have a system based on a Motorola 8xx-series
687 embedded processor with a QSPAN PCI interface, otherwise say N.
688
689config PCI_8260
690 bool
691 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000692 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000693 default y
694
695config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700696 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500697 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000698 default y
699
700choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700701 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000702 depends on 8260_PCI9
703
704config 8260_PCI9_IDMA1
705 bool "IDMA1"
706
707config 8260_PCI9_IDMA2
708 bool "IDMA2"
709
710config 8260_PCI9_IDMA3
711 bool "IDMA3"
712
713config 8260_PCI9_IDMA4
714 bool "IDMA4"
715
716endchoice
717
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500718source "drivers/pci/pcie/Kconfig"
719
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000720source "drivers/pci/Kconfig"
721
722source "drivers/pcmcia/Kconfig"
723
724source "drivers/pci/hotplug/Kconfig"
725
Zhang Weif1f389d2008-04-18 13:33:39 -0700726config HAS_RAPIDIO
727 bool
728 default n
729
730config RAPIDIO
731 bool "RapidIO support"
732 depends on HAS_RAPIDIO
733 help
734 If you say Y here, the kernel will include drivers and
735 infrastructure code to support RapidIO interconnect devices.
736
737source "drivers/rapidio/Kconfig"
738
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000739endmenu
740
741menu "Advanced setup"
742 depends on PPC32
743
744config ADVANCED_OPTIONS
745 bool "Prompt for advanced kernel configuration options"
746 help
747 This option will enable prompting for a variety of advanced kernel
748 configuration options. These options can cause the kernel to not
749 work if they are set incorrectly, but can be used to optimize certain
750 aspects of kernel memory management.
751
752 Unless you know what you are doing, say N here.
753
754comment "Default settings for advanced configuration options are used"
755 depends on !ADVANCED_OPTIONS
756
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000757config LOWMEM_SIZE_BOOL
758 bool "Set maximum low memory"
759 depends on ADVANCED_OPTIONS
760 help
761 This option allows you to set the maximum amount of memory which
762 will be used as "low memory", that is, memory which the kernel can
763 access directly, without having to set up a kernel virtual mapping.
764 This can be useful in optimizing the layout of kernel virtual
765 memory.
766
767 Say N here unless you know what you are doing.
768
769config LOWMEM_SIZE
770 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
771 default "0x30000000"
772
Trent Piepho96051462008-12-08 19:34:58 -0800773config LOWMEM_CAM_NUM_BOOL
774 bool "Set number of CAMs to use to map low memory"
775 depends on ADVANCED_OPTIONS && FSL_BOOKE
776 help
777 This option allows you to set the maximum number of CAM slots that
778 will be used to map low memory. There are a limited number of slots
779 available and even more limited number that will fit in the L1 MMU.
780 However, using more entries will allow mapping more low memory. This
781 can be useful in optimizing the layout of kernel virtual memory.
782
783 Say N here unless you know what you are doing.
784
785config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400786 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800787 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
788 default 3
789
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000790config RELOCATABLE
791 bool "Build a relocatable kernel (EXPERIMENTAL)"
792 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
793 help
794 This builds a kernel image that is capable of running at the
795 location the kernel is loaded at (some alignment restrictions may
796 exist).
797
798 One use is for the kexec on panic case where the recovery kernel
799 must live at a different physical address than the primary
800 kernel.
801
802 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
803 it has been loaded at and the compile time physical addresses
804 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
805 setting can still be useful to bootwrappers that need to know the
806 load location of the kernel (eg. u-boot/mkimage).
807
808config PAGE_OFFSET_BOOL
809 bool "Set custom page offset address"
810 depends on ADVANCED_OPTIONS
811 help
812 This option allows you to set the kernel virtual address at which
813 the kernel will map low memory. This can be useful in optimizing
814 the virtual memory layout of the system.
815
816 Say N here unless you know what you are doing.
817
818config PAGE_OFFSET
819 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
820 default "0xc0000000"
821
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000822config KERNEL_START_BOOL
823 bool "Set custom kernel base address"
824 depends on ADVANCED_OPTIONS
825 help
826 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000827 the kernel will be loaded. Normally this should match PAGE_OFFSET
828 however there are times (like kdump) that one might not want them
829 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000830
831 Say N here unless you know what you are doing.
832
833config KERNEL_START
834 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000835 default PAGE_OFFSET if PAGE_OFFSET_BOOL
836 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000837 default "0xc0000000"
838
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000839config PHYSICAL_START_BOOL
840 bool "Set physical address where the kernel is loaded"
841 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
842 help
843 This gives the physical address where the kernel is loaded.
844
845 Say N here unless you know what you are doing.
846
847config PHYSICAL_START
848 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
849 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
850 default "0x00000000"
851
852config PHYSICAL_ALIGN
853 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800854 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000855 help
856 This value puts the alignment restrictions on physical address
857 where kernel is loaded and run from. Kernel is compiled for an
858 address which meets above alignment restriction.
859
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000860config TASK_SIZE_BOOL
861 bool "Set custom user task size"
862 depends on ADVANCED_OPTIONS
863 help
864 This option allows you to set the amount of virtual address space
865 allocated to user tasks. This can be useful in optimizing the
866 virtual memory layout of the system.
867
868 Say N here unless you know what you are doing.
869
870config TASK_SIZE
871 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500872 default "0x80000000" if PPC_PREP || PPC_8xx
873 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000874
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000875config PIN_TLB
876 bool "Pinned Kernel TLBs (860 ONLY)"
877 depends on ADVANCED_OPTIONS && 8xx
878endmenu
879
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000880if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000881config RELOCATABLE
882 bool "Build a relocatable kernel"
883 help
884 This builds a kernel image that is capable of running anywhere
885 in the RMA (real memory area) at any 16k-aligned base address.
886 The kernel is linked as a position-independent executable (PIE)
887 and contains dynamic relocations which are processed early
888 in the bootup process.
889
890 One use is for the kexec on panic case where the recovery kernel
891 must live at a different physical address than the primary
892 kernel.
893
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000894config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000895 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000896 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000897config KERNEL_START
898 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000899 default "0xc000000000000000"
900config PHYSICAL_START
901 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000902 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000903endif
904
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000905source "net/Kconfig"
906
907source "drivers/Kconfig"
908
909source "fs/Kconfig"
910
Li Yang98658532006-10-03 23:10:46 -0500911source "arch/powerpc/sysdev/qe_lib/Kconfig"
912
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000913source "lib/Kconfig"
914
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000915source "arch/powerpc/Kconfig.debug"
916
917source "security/Kconfig"
918
919config KEYS_COMPAT
920 bool
921 depends on COMPAT && KEYS
922 default y
923
924source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000925
926config PPC_CLOCK
927 bool
928 default n
David Brownell9483a572008-07-23 21:26:48 -0700929 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000930
931config PPC_LIB_RHEAP
932 bool
933
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500934source "arch/powerpc/kvm/Kconfig"