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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
Jon Mason0a9cb462006-05-19 15:35:32 -050096config GENERIC_FIND_NEXT_BIT
97 bool
98 default y
99
Anton Vorontsovb7ce3412008-04-11 23:06:36 +1000100config GENERIC_GPIO
101 bool
102 help
103 Generic GPIO API support
104
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700105config ARCH_NO_VIRT_TO_BUS
106 def_bool PPC64
107
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000108config PPC
109 bool
110 default y
Steven Rostedt2b79d692009-01-06 18:49:17 +0000111 select HAVE_FTRACE_MCOUNT_RECORD
112 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400113 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500114 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700115 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100116 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700117 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700118 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500119 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500120 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800121 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000122 select HAVE_ARCH_TRACEHOOK
David S. Millerd9b2b2a2008-02-13 16:56:49 -0800123 select HAVE_LMB
Takashi Iwai7ff86b02008-07-16 02:20:11 +0200124 select HAVE_DMA_ATTRS if PPC64
Jens Axboeb7d7a242008-06-26 11:22:13 +0200125 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400126 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100127 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000128
129config EARLY_PRINTK
130 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100131 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000132
133config COMPAT
134 bool
135 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800136 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000137
138config SYSVIPC_COMPAT
139 bool
140 depends on COMPAT && SYSVIPC
141 default y
142
143# All PPC32s use generic nvram driver through ppc_md
144config GENERIC_NVRAM
145 bool
146 default y if PPC32
147
Ingo Molnarae1e9132008-11-11 09:05:16 +0100148config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000149 bool
150 default y
151
152config ARCH_MAY_HAVE_PC_FDC
153 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100154 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000155
Kumar Gala08264cb2006-01-10 21:43:56 -0600156config PPC_OF
157 def_bool y
158
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000159config OF
160 def_bool y
161
Kumar Gala08264cb2006-01-10 21:43:56 -0600162config PPC_UDBG_16550
163 bool
164 default n
165
Kumar Gala08264cb2006-01-10 21:43:56 -0600166config GENERIC_TBSYNC
167 bool
168 default y if PPC32 && SMP
169 default n
170
Al Viroe65e1fc2006-09-12 03:04:40 -0400171config AUDIT_ARCH
172 bool
173 default y
174
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800175config GENERIC_BUG
176 bool
177 default y
178 depends on BUG
179
Johannes Bergb3028872007-03-20 05:18:02 +1100180config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500181 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100182 bool
183
David Gibson9fffb552009-04-30 15:25:53 +1000184config DTC
185 bool
186 default y
187
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600188config DEFAULT_UIMAGE
189 bool
190 help
191 Used to allow a board to specify it wants a uImage built by default
192 default n
193
Scott Woodb09c1642008-01-17 16:31:40 -0600194config REDBOOT
195 bool
196
Johannes Berg801e4062007-12-08 02:12:39 +0100197config HIBERNATE_32
Johannes Berg543b9fd2007-05-03 22:31:38 +1000198 bool
Johannes Berg801e4062007-12-08 02:12:39 +0100199 depends on (PPC_PMAC && !SMP) || BROKEN
200 default y
201
202config HIBERNATE_64
203 bool
204 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
205 default y
206
207config ARCH_HIBERNATION_POSSIBLE
208 bool
209 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
Johannes Berg543b9fd2007-05-03 22:31:38 +1000210 default y
211
Johannes Bergf4cb5702007-12-08 02:14:00 +0100212config ARCH_SUSPEND_POSSIBLE
213 def_bool y
Scott Woodd49747b2007-10-09 12:37:13 -0500214 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100215
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100216config PPC_DCR_NATIVE
217 bool
218 default n
219
220config PPC_DCR_MMIO
221 bool
222 default n
223
224config PPC_DCR
225 bool
226 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
227 default y
228
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100229config PPC_OF_PLATFORM_PCI
230 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100231 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100232 depends on PPC64 # not supported on 32 bits yet
233 default n
234
Akinobu Mita6a11f752009-03-31 15:23:17 -0700235config ARCH_SUPPORTS_DEBUG_PAGEALLOC
236 def_bool y
237
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000238source "init/Kconfig"
239
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700240source "kernel/Kconfig.freezer"
241
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100242source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500243source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000244
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000245menu "Kernel options"
246
247config HIGHMEM
248 bool "High memory support"
249 depends on PPC32
250
Tony Breeds1ad74992007-09-21 13:26:03 +1000251source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000252source kernel/Kconfig.hz
253source kernel/Kconfig.preempt
254source "fs/Kconfig.binfmt"
255
Mel Gormanba72cb82007-11-28 16:21:13 -0800256config HUGETLB_PAGE_SIZE_VARIABLE
257 bool
258 depends on HUGETLB_PAGE
259 default y
260
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000261config MATH_EMULATION
262 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600263 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000264 ---help---
265 Some PowerPC chips designed for embedded applications do not have
266 a floating-point unit and therefore do not implement the
267 floating-point instructions in the PowerPC instruction set. If you
268 say Y here, the kernel will include code to emulate a floating-point
269 unit, which will allow programs that use floating-point
270 instructions to run.
271
Scott Wood5dd57a12007-09-18 15:29:35 -0500272config 8XX_MINIMAL_FPEMU
273 bool "Minimal math emulation for 8xx"
274 depends on 8xx && !MATH_EMULATION
275 help
276 Older arch/ppc kernels still emulated a few floating point
277 instructions such as load and store, even when full math
278 emulation is disabled. Say "Y" here if you want to preserve
279 this behavior.
280
281 It is recommended that you build a soft-float userspace instead.
282
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000283config IOMMU_VMERGE
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000284 bool "Enable IOMMU virtual merging"
285 depends on PPC64
286 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000287 help
288 Cause IO segments sent to a device for DMA to be merged virtually
289 by the IOMMU when they happen to have been allocated contiguously.
290 This doesn't add pressure to the IOMMU allocator. However, some
291 drivers don't support getting large merged segments coming back
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000292 from *_map_sg().
293
294 Most drivers don't have this problem; it is safe to say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000295
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800296config IOMMU_HELPER
297 def_bool PPC64
298
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000299config SWIOTLB
300 bool "SWIOTLB support"
301 default n
302 select IOMMU_HELPER
303 ---help---
304 Support for IO bounce buffering for systems without an IOMMU.
305 This allows us to DMA to the full physical address space on
306 platforms where the size of a physical address is larger
307 than the bus address. Not all platforms support this.
308
Becky Bruce15e09c02008-11-20 06:49:16 +0000309config PPC_NEED_DMA_SYNC_OPS
310 def_bool y
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000311 depends on (NOT_COHERENT_CACHE || SWIOTLB)
Becky Bruce15e09c02008-11-20 06:49:16 +0000312
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000313config HOTPLUG_CPU
314 bool "Support for enabling/disabling CPUs"
315 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
316 ---help---
317 Say Y here to be able to disable and re-enable individual
318 CPUs at runtime on SMP machines.
319
320 Say N if you are unsure.
321
Yasunori Gotocc576372006-06-29 02:24:27 -0700322config ARCH_ENABLE_MEMORY_HOTPLUG
323 def_bool y
324
Badari Pulavartya99824f2008-02-05 00:10:18 -0800325config ARCH_HAS_WALK_MEMORY
326 def_bool y
327
Badari Pulavarty14824712008-02-05 00:10:17 -0800328config ARCH_ENABLE_MEMORY_HOTREMOVE
329 def_bool y
330
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000331config KEXEC
332 bool "kexec system call (EXPERIMENTAL)"
Geert Uytterhoevencb93d562009-04-02 06:25:41 +0000333 depends on PPC_BOOK3S && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000334 help
335 kexec is a system call that implements the ability to shutdown your
336 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400337 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000338 you can start any kernel with it, not just Linux.
339
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400340 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000341
342 It is an ongoing process to be certain the hardware in a machine
343 is properly shutdown, so do not be surprised if this code does not
344 initially work for you. It may help to enable device hotplugging
345 support. As of this writing the exact hardware interface is
346 strongly in flux, so no good recommendation can be made.
347
Haren Mynenie8625d462006-01-14 13:48:25 -0800348config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000349 bool "Build a kdump crash kernel"
Mohan Kumar Mc6ac71a2009-01-06 00:23:01 +0000350 depends on PPC64 || 6xx
351 select RELOCATABLE if PPC64
Haren Mynenie8625d462006-01-14 13:48:25 -0800352 help
353 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000354 The same kernel binary can be used as production kernel and dump
355 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800356
Manish Ahuja242f2712008-03-22 10:50:50 +1100357config PHYP_DUMP
358 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
359 depends on PPC_PSERIES && EXPERIMENTAL
360 help
361 Hypervisor-assisted dump is meant to be a kdump replacement
362 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100363 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100364
365 If unsure, say "N"
366
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000367config PPCBUG_NVRAM
368 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
369 default y if PPC_PREP
370
371config IRQ_ALL_CPUS
372 bool "Distribute interrupts on all CPUs by default"
373 depends on SMP && !MV64360
374 help
375 This option gives the kernel permission to distribute IRQs across
376 multiple CPUs. Saying N here will route all IRQs to the first
377 CPU. Generally saying Y is safe, although some problems have been
378 reported with SMP Power Macintoshes with this option enabled.
379
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700380config NUMA
381 bool "NUMA support"
382 depends on PPC64
383 default y if SMP && PPC_PSERIES
384
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700385config NODES_SHIFT
386 int
387 default "4"
388 depends on NEED_MULTIPLE_NODES
389
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000390config ARCH_SELECT_MEMORY_MODEL
391 def_bool y
392 depends on PPC64
393
394config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000395 def_bool y
396 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000397
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000398config ARCH_SPARSEMEM_ENABLE
399 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000400 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700401 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100402
403config ARCH_SPARSEMEM_DEFAULT
404 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100405 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000406
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700407config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000408 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700409
410source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000411
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800412config ARCH_MEMORY_PROBE
413 def_bool y
414 depends on MEMORY_HOTPLUG
415
Andy Whitcroft75167952006-10-21 10:24:14 -0700416# Some NUMA nodes have memory ranges that span
417# other nodes. Even though a pfn is valid and
418# between a node's start and end pfns, it may not
419# reside on that node. See memmap_init_zone()
420# for details.
421config NODES_SPAN_OTHER_NODES
422 def_bool y
423 depends on NEED_MULTIPLE_NODES
424
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000425config PPC_HAS_HASH_64K
426 bool
427 depends on PPC64
428 default n
429
Yuri Tikhonove1240122009-01-29 01:40:44 +0000430config STDBINUTILS
431 bool "Using standard binutils settings"
432 depends on 44x
433 default y
434 help
435 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
436 Note, that kernel will be able to run only those applications,
437 which had been compiled using binutils later than 2.17.50.0.3 with
438 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
439 the older binutils, you can patch them with a trivial patch, which
440 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
441
Ilya Yanokca9153a2008-12-11 04:55:41 +0300442choice
443 prompt "Page size"
444 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100445 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300446 Select the kernel logical page size. Increasing the page size
447 will reduce software overhead at each page boundary, allow
448 hardware prefetch mechanisms to be more effective, and allow
449 larger dma transfers increasing IO efficiency and reducing
450 overhead. However the utilization of memory will increase.
451 For example, each cached file will using a multiple of the
452 page size to hold its contents and the difference between the
453 end of file and the end of page is wasted.
454
455 Some dedicated systems, such as software raid serving with
456 accelerated calculations, have shown significant increases.
457
458 If you configure a 64 bit kernel for 64k pages but the
459 processor does not support them, then the kernel will simulate
460 them with 4k pages, loading them on demand, but with the
461 reduced software overhead and larger internal fragmentation.
462 For the 32 bit kernel, a large page option will not be offered
463 unless it is supported by the configured processor.
464
465 If unsure, choose 4K_PAGES.
466
467config PPC_4K_PAGES
468 bool "4k page size"
469
470config PPC_16K_PAGES
471 bool "16k page size" if 44x
472
473config PPC_64K_PAGES
474 bool "64k page size" if 44x || PPC_STD_MMU_64
475 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
476
Yuri Tikhonove1240122009-01-29 01:40:44 +0000477config PPC_256K_PAGES
478 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000479 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000480 help
481 Make the page size 256k.
482
483 As the ELF standard only requires alignment to support page
484 sizes up to 64k, you will need to compile all of your user
485 space applications with a non-standard binutils settings
486 (see the STDBINUTILS description for details).
487
488 Say N unless you know what you are doing.
489
Ilya Yanokca9153a2008-12-11 04:55:41 +0300490endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100491
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000492config FORCE_MAX_ZONEORDER
493 int "Maximum zone order"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300494 range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
495 default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
496 range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
497 default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
498 range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
499 default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
500 range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
501 default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
Yuri Tikhonove1240122009-01-29 01:40:44 +0000502 range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
503 default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000504 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000505 default "11"
506 help
507 The kernel memory allocator divides physically contiguous memory
508 blocks into "zones", where each zone is a power of two number of
509 pages. This option selects the largest power of two that the kernel
510 keeps in the memory allocator. If you need to allocate very large
511 blocks of physically contiguous memory, then you may need to
512 increase this value.
513
514 This config option is actually maximum order plus one. For example,
515 a value of 11 means that the largest free memory block is 2^10 pages.
516
517 The page size is not necessarily 4KB. For example, on 64-bit
518 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
519 this in mind when choosing a value for this option.
520
Paul Mackerrasfa282372008-01-24 08:35:13 +1100521config PPC_SUBPAGE_PROT
522 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300523 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100524 help
525 This option adds support for a system call to allow user programs
526 to set access permissions (read/write, readonly, or no access)
527 on the 4k subpages of each 64k page.
528
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000529config SCHED_SMT
530 bool "SMT (Hyperthreading) scheduler support"
531 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000532 help
533 SMT scheduler support improves the CPU scheduler's decision making
534 when dealing with POWER5 cpus at a cost of slightly increased
535 overhead in some places. If unsure say N here.
536
537config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000538 bool "Support for device tree in /proc"
539 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000540 help
541 This option adds a device-tree directory under /proc which contains
542 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000543 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000544
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000545config CMDLINE_BOOL
546 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000547
548config CMDLINE
549 string "Initial kernel command string"
550 depends on CMDLINE_BOOL
551 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
552 help
553 On some platforms, there is currently no way for the boot loader to
554 pass arguments to the kernel. For these platforms, you can supply
555 some command-line options at build time by entering them here. In
556 most cases you will need to specify the root device here.
557
Grant Likelyc356aa42008-07-09 09:41:52 -0600558config EXTRA_TARGETS
559 string "Additional default image types"
560 help
561 List additional targets to be built by the bootwrapper here (separated
562 by spaces). This is useful for targets that depend of device tree
563 files in the .dts directory.
564
565 Targets in this list will be build as part of the default build
566 target, or when the user does a 'make zImage' or a
567 'make zImage.initrd'.
568
569 If unsure, leave blank
570
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000571if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500572config ARCH_WANTS_FREEZER_CONTROL
573 def_bool y
574 depends on ADB_PMU
575
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000576source kernel/power/Kconfig
577endif
578
579config SECCOMP
580 bool "Enable seccomp to safely compute untrusted bytecode"
581 depends on PROC_FS
582 default y
583 help
584 This kernel feature is useful for number crunching applications
585 that may need to compute untrusted bytecode during their
586 execution. By using pipes or other transports made available to
587 the process as file descriptors supporting the read/write
588 syscalls, it's possible to isolate those applications in
589 their own address space using seccomp. Once seccomp is
590 enabled via /proc/<pid>/seccomp, it cannot be disabled
591 and the task is only allowed to execute a few safe syscalls
592 defined by each seccomp mode.
593
594 If unsure, say Y. Only embedded should say N here.
595
596endmenu
597
598config ISA_DMA_API
599 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100600 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000601
602menu "Bus options"
603
604config ISA
605 bool "Support for ISA-bus hardware"
606 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000607 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000608 help
609 Find out whether you have ISA slots on your motherboard. ISA is the
610 name of a bus system, i.e. the way the CPU talks to the other stuff
611 inside your box. If you have an Apple machine, say N here; if you
612 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
613 you have an embedded board, consult your board documentation.
614
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800615config ZONE_DMA
616 bool
617 default y
618
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000619config GENERIC_ISA_DMA
620 bool
621 depends on PPC64 || POWER4 || 6xx && !CPM2
622 default y
623
Paul Mackerras25635c72005-10-26 16:36:55 +1000624config PPC_INDIRECT_PCI
625 bool
626 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600627 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000628 default n
629
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000630config EISA
631 bool
632
633config SBUS
634 bool
635
Kumar Gala08264cb2006-01-10 21:43:56 -0600636config FSL_SOC
637 bool
638
Roy Zang55c44992007-07-10 18:44:34 +0800639config FSL_PCI
640 bool
641 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600642 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800643
Stefan Roese2a706912008-03-26 22:39:50 +1100644config 4xx_SOC
645 bool
646
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400647config FSL_LBC
648 bool
649 help
650 Freescale Localbus support
651
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400652config FSL_GTM
653 bool
654 depends on PPC_83xx || QUICC_ENGINE || CPM2
655 help
656 Freescale General-purpose Timers support
657
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000658# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
659config MCA
660 bool
661
John Rigbyb5005632008-06-26 11:07:56 -0600662# Platforms that what PCI turned unconditionally just do select PCI
663# in their config node. Platforms that want to choose at config
664# time should select PPC_PCI_CHOICE
665config PPC_PCI_CHOICE
666 bool
667
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000668config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600669 bool "PCI support" if PPC_PCI_CHOICE
670 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Jon Loeliger53158622006-08-09 10:37:28 -0500671 && !PPC_85xx && !PPC_86xx
David Gibsonf21f49e2007-06-13 14:52:54 +1000672 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000673 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000674 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000675 help
676 Find out whether your system includes a PCI bus. PCI is the name of
677 a bus system, i.e. the way the CPU talks to the other stuff inside
678 your box. If you say Y here, the kernel will include drivers and
679 infrastructure code to support PCI bus devices.
680
681config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600682 def_bool PCI
683
684config PCI_SYSCALL
685 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000686
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000687config PCI_QSPAN
688 bool "QSpan PCI"
689 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000690 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000691 help
692 Say Y here if you have a system based on a Motorola 8xx-series
693 embedded processor with a QSPAN PCI interface, otherwise say N.
694
695config PCI_8260
696 bool
697 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000698 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000699 default y
700
701config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700702 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500703 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000704 default y
705
706choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700707 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000708 depends on 8260_PCI9
709
710config 8260_PCI9_IDMA1
711 bool "IDMA1"
712
713config 8260_PCI9_IDMA2
714 bool "IDMA2"
715
716config 8260_PCI9_IDMA3
717 bool "IDMA3"
718
719config 8260_PCI9_IDMA4
720 bool "IDMA4"
721
722endchoice
723
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500724source "drivers/pci/pcie/Kconfig"
725
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000726source "drivers/pci/Kconfig"
727
728source "drivers/pcmcia/Kconfig"
729
730source "drivers/pci/hotplug/Kconfig"
731
Zhang Weif1f389d2008-04-18 13:33:39 -0700732config HAS_RAPIDIO
733 bool
734 default n
735
736config RAPIDIO
737 bool "RapidIO support"
738 depends on HAS_RAPIDIO
739 help
740 If you say Y here, the kernel will include drivers and
741 infrastructure code to support RapidIO interconnect devices.
742
743source "drivers/rapidio/Kconfig"
744
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000745endmenu
746
747menu "Advanced setup"
748 depends on PPC32
749
750config ADVANCED_OPTIONS
751 bool "Prompt for advanced kernel configuration options"
752 help
753 This option will enable prompting for a variety of advanced kernel
754 configuration options. These options can cause the kernel to not
755 work if they are set incorrectly, but can be used to optimize certain
756 aspects of kernel memory management.
757
758 Unless you know what you are doing, say N here.
759
760comment "Default settings for advanced configuration options are used"
761 depends on !ADVANCED_OPTIONS
762
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000763config LOWMEM_SIZE_BOOL
764 bool "Set maximum low memory"
765 depends on ADVANCED_OPTIONS
766 help
767 This option allows you to set the maximum amount of memory which
768 will be used as "low memory", that is, memory which the kernel can
769 access directly, without having to set up a kernel virtual mapping.
770 This can be useful in optimizing the layout of kernel virtual
771 memory.
772
773 Say N here unless you know what you are doing.
774
775config LOWMEM_SIZE
776 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
777 default "0x30000000"
778
Trent Piepho96051462008-12-08 19:34:58 -0800779config LOWMEM_CAM_NUM_BOOL
780 bool "Set number of CAMs to use to map low memory"
781 depends on ADVANCED_OPTIONS && FSL_BOOKE
782 help
783 This option allows you to set the maximum number of CAM slots that
784 will be used to map low memory. There are a limited number of slots
785 available and even more limited number that will fit in the L1 MMU.
786 However, using more entries will allow mapping more low memory. This
787 can be useful in optimizing the layout of kernel virtual memory.
788
789 Say N here unless you know what you are doing.
790
791config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400792 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800793 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
794 default 3
795
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000796config RELOCATABLE
797 bool "Build a relocatable kernel (EXPERIMENTAL)"
798 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
799 help
800 This builds a kernel image that is capable of running at the
801 location the kernel is loaded at (some alignment restrictions may
802 exist).
803
804 One use is for the kexec on panic case where the recovery kernel
805 must live at a different physical address than the primary
806 kernel.
807
808 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
809 it has been loaded at and the compile time physical addresses
810 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
811 setting can still be useful to bootwrappers that need to know the
812 load location of the kernel (eg. u-boot/mkimage).
813
814config PAGE_OFFSET_BOOL
815 bool "Set custom page offset address"
816 depends on ADVANCED_OPTIONS
817 help
818 This option allows you to set the kernel virtual address at which
819 the kernel will map low memory. This can be useful in optimizing
820 the virtual memory layout of the system.
821
822 Say N here unless you know what you are doing.
823
824config PAGE_OFFSET
825 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
826 default "0xc0000000"
827
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000828config KERNEL_START_BOOL
829 bool "Set custom kernel base address"
830 depends on ADVANCED_OPTIONS
831 help
832 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000833 the kernel will be loaded. Normally this should match PAGE_OFFSET
834 however there are times (like kdump) that one might not want them
835 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000836
837 Say N here unless you know what you are doing.
838
839config KERNEL_START
840 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000841 default PAGE_OFFSET if PAGE_OFFSET_BOOL
842 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000843 default "0xc0000000"
844
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000845config PHYSICAL_START_BOOL
846 bool "Set physical address where the kernel is loaded"
847 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
848 help
849 This gives the physical address where the kernel is loaded.
850
851 Say N here unless you know what you are doing.
852
853config PHYSICAL_START
854 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
855 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
856 default "0x00000000"
857
858config PHYSICAL_ALIGN
859 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800860 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000861 help
862 This value puts the alignment restrictions on physical address
863 where kernel is loaded and run from. Kernel is compiled for an
864 address which meets above alignment restriction.
865
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000866config TASK_SIZE_BOOL
867 bool "Set custom user task size"
868 depends on ADVANCED_OPTIONS
869 help
870 This option allows you to set the amount of virtual address space
871 allocated to user tasks. This can be useful in optimizing the
872 virtual memory layout of the system.
873
874 Say N here unless you know what you are doing.
875
876config TASK_SIZE
877 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500878 default "0x80000000" if PPC_PREP || PPC_8xx
879 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000880
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000881config CONSISTENT_SIZE_BOOL
882 bool "Set custom consistent memory pool size"
883 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
884 help
885 This option allows you to set the size of the
886 consistent memory pool. This pool of virtual memory
887 is used to make consistent memory allocations.
888
889config CONSISTENT_SIZE
890 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
891 default "0x00200000" if NOT_COHERENT_CACHE
892
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000893config PIN_TLB
894 bool "Pinned Kernel TLBs (860 ONLY)"
895 depends on ADVANCED_OPTIONS && 8xx
896endmenu
897
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000898if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000899config RELOCATABLE
900 bool "Build a relocatable kernel"
901 help
902 This builds a kernel image that is capable of running anywhere
903 in the RMA (real memory area) at any 16k-aligned base address.
904 The kernel is linked as a position-independent executable (PIE)
905 and contains dynamic relocations which are processed early
906 in the bootup process.
907
908 One use is for the kexec on panic case where the recovery kernel
909 must live at a different physical address than the primary
910 kernel.
911
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000912config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000913 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000914 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000915config KERNEL_START
916 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000917 default "0xc000000000000000"
918config PHYSICAL_START
919 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000920 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000921endif
922
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000923source "net/Kconfig"
924
925source "drivers/Kconfig"
926
927source "fs/Kconfig"
928
Li Yang98658532006-10-03 23:10:46 -0500929source "arch/powerpc/sysdev/qe_lib/Kconfig"
930
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000931source "lib/Kconfig"
932
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000933source "arch/powerpc/Kconfig.debug"
934
935source "security/Kconfig"
936
937config KEYS_COMPAT
938 bool
939 depends on COMPAT && KEYS
940 default y
941
942source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000943
944config PPC_CLOCK
945 bool
946 default n
David Brownell9483a572008-07-23 21:26:48 -0700947 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000948
949config PPC_LIB_RHEAP
950 bool
951
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500952source "arch/powerpc/kvm/Kconfig"