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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
travis@sgi.com988c3882008-01-30 23:27:58 +010045config HAVE_SETUP_PER_CPU_AREA
travis@sgi.comb32ef632008-01-30 13:32:51 +010046 def_bool PPC64
47
Ingo Molnar0d7012a2006-06-29 02:24:43 -070048config IRQ_PER_CPU
49 bool
50 default y
51
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100052config STACKTRACE_SUPPORT
53 bool
54 default y
55
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100056config HAVE_LATENCYTOP_SUPPORT
57 def_bool y
58
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100059config TRACE_IRQFLAGS_SUPPORT
60 bool
61 depends on PPC64
62 default y
63
64config LOCKDEP_SUPPORT
65 bool
66 default y
67
Paul Mackerras14cf11a2005-09-26 16:04:21 +100068config RWSEM_GENERIC_SPINLOCK
69 bool
70
71config RWSEM_XCHGADD_ALGORITHM
72 bool
73 default y
74
Nick Piggin95c354f2008-01-30 13:31:20 +010075config GENERIC_LOCKBREAK
76 bool
77 default y
78 depends on SMP && PREEMPT
79
David Howellsf0d1b0b2006-12-08 02:37:49 -080080config ARCH_HAS_ILOG2_U32
81 bool
David Howellsef55d532006-12-08 02:37:53 -080082 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080083
84config ARCH_HAS_ILOG2_U64
85 bool
David Howellsef55d532006-12-08 02:37:53 -080086 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080087
Akinobu Mitae779b2f2006-03-26 01:39:33 -080088config GENERIC_HWEIGHT
89 bool
90 default y
91
Paul Mackerras14cf11a2005-09-26 16:04:21 +100092config GENERIC_CALIBRATE_DELAY
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
Michael Buesch7444a722008-07-25 01:46:11 -0700114 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100115 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700116 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700117 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500118 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500119 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800120 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000121 select HAVE_ARCH_TRACEHOOK
David S. Millerd9b2b2a2008-02-13 16:56:49 -0800122 select HAVE_LMB
Takashi Iwai7ff86b02008-07-16 02:20:11 +0200123 select HAVE_DMA_ATTRS if PPC64
Jens Axboeb7d7a242008-06-26 11:22:13 +0200124 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400125 select HAVE_OPROFILE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000126
127config EARLY_PRINTK
128 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100129 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000130
131config COMPAT
132 bool
133 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800134 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000135
136config SYSVIPC_COMPAT
137 bool
138 depends on COMPAT && SYSVIPC
139 default y
140
141# All PPC32s use generic nvram driver through ppc_md
142config GENERIC_NVRAM
143 bool
144 default y if PPC32
145
Ingo Molnarae1e9132008-11-11 09:05:16 +0100146config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000147 bool
148 default y
149
150config ARCH_MAY_HAVE_PC_FDC
151 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100152 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000153
Kumar Gala08264cb2006-01-10 21:43:56 -0600154config PPC_OF
155 def_bool y
156
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000157config OF
158 def_bool y
159
Kumar Gala08264cb2006-01-10 21:43:56 -0600160config PPC_UDBG_16550
161 bool
162 default n
163
Kumar Gala08264cb2006-01-10 21:43:56 -0600164config GENERIC_TBSYNC
165 bool
166 default y if PPC32 && SMP
167 default n
168
Al Viroe65e1fc2006-09-12 03:04:40 -0400169config AUDIT_ARCH
170 bool
171 default y
172
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800173config GENERIC_BUG
174 bool
175 default y
176 depends on BUG
177
Johannes Bergb3028872007-03-20 05:18:02 +1100178config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500179 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100180 bool
181
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600182config DEFAULT_UIMAGE
183 bool
184 help
185 Used to allow a board to specify it wants a uImage built by default
186 default n
187
Scott Woodb09c1642008-01-17 16:31:40 -0600188config REDBOOT
189 bool
190
Johannes Berg801e4062007-12-08 02:12:39 +0100191config HIBERNATE_32
Johannes Berg543b9fd2007-05-03 22:31:38 +1000192 bool
Johannes Berg801e4062007-12-08 02:12:39 +0100193 depends on (PPC_PMAC && !SMP) || BROKEN
194 default y
195
196config HIBERNATE_64
197 bool
198 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
199 default y
200
201config ARCH_HIBERNATION_POSSIBLE
202 bool
203 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
Johannes Berg543b9fd2007-05-03 22:31:38 +1000204 default y
205
Johannes Bergf4cb5702007-12-08 02:14:00 +0100206config ARCH_SUSPEND_POSSIBLE
207 def_bool y
Scott Woodd49747b2007-10-09 12:37:13 -0500208 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100209
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100210config PPC_DCR_NATIVE
211 bool
212 default n
213
214config PPC_DCR_MMIO
215 bool
216 default n
217
218config PPC_DCR
219 bool
220 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
221 default y
222
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100223config PPC_OF_PLATFORM_PCI
224 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100225 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100226 depends on PPC64 # not supported on 32 bits yet
227 default n
228
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000229source "init/Kconfig"
230
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700231source "kernel/Kconfig.freezer"
232
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100233source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500234source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000235
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000236menu "Kernel options"
237
238config HIGHMEM
239 bool "High memory support"
240 depends on PPC32
241
Tony Breeds1ad74992007-09-21 13:26:03 +1000242source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000243source kernel/Kconfig.hz
244source kernel/Kconfig.preempt
245source "fs/Kconfig.binfmt"
246
Mel Gormanba72cb82007-11-28 16:21:13 -0800247config HUGETLB_PAGE_SIZE_VARIABLE
248 bool
249 depends on HUGETLB_PAGE
250 default y
251
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000252config MATH_EMULATION
253 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600254 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000255 ---help---
256 Some PowerPC chips designed for embedded applications do not have
257 a floating-point unit and therefore do not implement the
258 floating-point instructions in the PowerPC instruction set. If you
259 say Y here, the kernel will include code to emulate a floating-point
260 unit, which will allow programs that use floating-point
261 instructions to run.
262
Scott Wood5dd57a12007-09-18 15:29:35 -0500263config 8XX_MINIMAL_FPEMU
264 bool "Minimal math emulation for 8xx"
265 depends on 8xx && !MATH_EMULATION
266 help
267 Older arch/ppc kernels still emulated a few floating point
268 instructions such as load and store, even when full math
269 emulation is disabled. Say "Y" here if you want to preserve
270 this behavior.
271
272 It is recommended that you build a soft-float userspace instead.
273
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000274config IOMMU_VMERGE
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000275 bool "Enable IOMMU virtual merging"
276 depends on PPC64
277 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000278 help
279 Cause IO segments sent to a device for DMA to be merged virtually
280 by the IOMMU when they happen to have been allocated contiguously.
281 This doesn't add pressure to the IOMMU allocator. However, some
282 drivers don't support getting large merged segments coming back
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000283 from *_map_sg().
284
285 Most drivers don't have this problem; it is safe to say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000286
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800287config IOMMU_HELPER
288 def_bool PPC64
289
Becky Bruce15e09c02008-11-20 06:49:16 +0000290config PPC_NEED_DMA_SYNC_OPS
291 def_bool y
292 depends on NOT_COHERENT_CACHE
293
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000294config HOTPLUG_CPU
295 bool "Support for enabling/disabling CPUs"
296 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
297 ---help---
298 Say Y here to be able to disable and re-enable individual
299 CPUs at runtime on SMP machines.
300
301 Say N if you are unsure.
302
Yasunori Gotocc576372006-06-29 02:24:27 -0700303config ARCH_ENABLE_MEMORY_HOTPLUG
304 def_bool y
305
Badari Pulavartya99824f2008-02-05 00:10:18 -0800306config ARCH_HAS_WALK_MEMORY
307 def_bool y
308
Badari Pulavarty14824712008-02-05 00:10:17 -0800309config ARCH_ENABLE_MEMORY_HOTREMOVE
310 def_bool y
311
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000312config KEXEC
313 bool "kexec system call (EXPERIMENTAL)"
Dale Farnsworthfd4ba7e2007-05-12 10:58:43 +1000314 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000315 help
316 kexec is a system call that implements the ability to shutdown your
317 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400318 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000319 you can start any kernel with it, not just Linux.
320
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400321 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000322
323 It is an ongoing process to be certain the hardware in a machine
324 is properly shutdown, so do not be surprised if this code does not
325 initially work for you. It may help to enable device hotplugging
326 support. As of this writing the exact hardware interface is
327 strongly in flux, so no good recommendation can be made.
328
Haren Mynenie8625d462006-01-14 13:48:25 -0800329config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000330 bool "Build a kdump crash kernel"
Mohan Kumar Mc6ac71a2009-01-06 00:23:01 +0000331 depends on PPC64 || 6xx
332 select RELOCATABLE if PPC64
Haren Mynenie8625d462006-01-14 13:48:25 -0800333 help
334 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000335 The same kernel binary can be used as production kernel and dump
336 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800337
Manish Ahuja242f2712008-03-22 10:50:50 +1100338config PHYP_DUMP
339 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
340 depends on PPC_PSERIES && EXPERIMENTAL
341 help
342 Hypervisor-assisted dump is meant to be a kdump replacement
343 offering robustness and speed not possible without system
344 hypervisor assistence.
345
346 If unsure, say "N"
347
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000348config PPCBUG_NVRAM
349 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
350 default y if PPC_PREP
351
352config IRQ_ALL_CPUS
353 bool "Distribute interrupts on all CPUs by default"
354 depends on SMP && !MV64360
355 help
356 This option gives the kernel permission to distribute IRQs across
357 multiple CPUs. Saying N here will route all IRQs to the first
358 CPU. Generally saying Y is safe, although some problems have been
359 reported with SMP Power Macintoshes with this option enabled.
360
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700361config NUMA
362 bool "NUMA support"
363 depends on PPC64
364 default y if SMP && PPC_PSERIES
365
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700366config NODES_SHIFT
367 int
368 default "4"
369 depends on NEED_MULTIPLE_NODES
370
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000371config ARCH_SELECT_MEMORY_MODEL
372 def_bool y
373 depends on PPC64
374
375config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000376 def_bool y
377 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000378
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000379config ARCH_SPARSEMEM_ENABLE
380 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000381 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700382 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100383
384config ARCH_SPARSEMEM_DEFAULT
385 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100386 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000387
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700388config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000389 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700390
391source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000392
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800393config ARCH_MEMORY_PROBE
394 def_bool y
395 depends on MEMORY_HOTPLUG
396
Andy Whitcroft75167952006-10-21 10:24:14 -0700397# Some NUMA nodes have memory ranges that span
398# other nodes. Even though a pfn is valid and
399# between a node's start and end pfns, it may not
400# reside on that node. See memmap_init_zone()
401# for details.
402config NODES_SPAN_OTHER_NODES
403 def_bool y
404 depends on NEED_MULTIPLE_NODES
405
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000406config PPC_HAS_HASH_64K
407 bool
408 depends on PPC64
409 default n
410
Ilya Yanokca9153a2008-12-11 04:55:41 +0300411choice
412 prompt "Page size"
413 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100414 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300415 Select the kernel logical page size. Increasing the page size
416 will reduce software overhead at each page boundary, allow
417 hardware prefetch mechanisms to be more effective, and allow
418 larger dma transfers increasing IO efficiency and reducing
419 overhead. However the utilization of memory will increase.
420 For example, each cached file will using a multiple of the
421 page size to hold its contents and the difference between the
422 end of file and the end of page is wasted.
423
424 Some dedicated systems, such as software raid serving with
425 accelerated calculations, have shown significant increases.
426
427 If you configure a 64 bit kernel for 64k pages but the
428 processor does not support them, then the kernel will simulate
429 them with 4k pages, loading them on demand, but with the
430 reduced software overhead and larger internal fragmentation.
431 For the 32 bit kernel, a large page option will not be offered
432 unless it is supported by the configured processor.
433
434 If unsure, choose 4K_PAGES.
435
436config PPC_4K_PAGES
437 bool "4k page size"
438
439config PPC_16K_PAGES
440 bool "16k page size" if 44x
441
442config PPC_64K_PAGES
443 bool "64k page size" if 44x || PPC_STD_MMU_64
444 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
445
446endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100447
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000448config FORCE_MAX_ZONEORDER
449 int "Maximum zone order"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300450 range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
451 default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
452 range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
453 default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
454 range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
455 default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
456 range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
457 default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000458 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000459 default "11"
460 help
461 The kernel memory allocator divides physically contiguous memory
462 blocks into "zones", where each zone is a power of two number of
463 pages. This option selects the largest power of two that the kernel
464 keeps in the memory allocator. If you need to allocate very large
465 blocks of physically contiguous memory, then you may need to
466 increase this value.
467
468 This config option is actually maximum order plus one. For example,
469 a value of 11 means that the largest free memory block is 2^10 pages.
470
471 The page size is not necessarily 4KB. For example, on 64-bit
472 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
473 this in mind when choosing a value for this option.
474
Paul Mackerrasfa282372008-01-24 08:35:13 +1100475config PPC_SUBPAGE_PROT
476 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300477 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100478 help
479 This option adds support for a system call to allow user programs
480 to set access permissions (read/write, readonly, or no access)
481 on the 4k subpages of each 64k page.
482
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000483config SCHED_SMT
484 bool "SMT (Hyperthreading) scheduler support"
485 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000486 help
487 SMT scheduler support improves the CPU scheduler's decision making
488 when dealing with POWER5 cpus at a cost of slightly increased
489 overhead in some places. If unsure say N here.
490
491config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000492 bool "Support for device tree in /proc"
493 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000494 help
495 This option adds a device-tree directory under /proc which contains
496 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000497 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000498
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000499config CMDLINE_BOOL
500 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000501
502config CMDLINE
503 string "Initial kernel command string"
504 depends on CMDLINE_BOOL
505 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
506 help
507 On some platforms, there is currently no way for the boot loader to
508 pass arguments to the kernel. For these platforms, you can supply
509 some command-line options at build time by entering them here. In
510 most cases you will need to specify the root device here.
511
Grant Likelyc356aa42008-07-09 09:41:52 -0600512config EXTRA_TARGETS
513 string "Additional default image types"
514 help
515 List additional targets to be built by the bootwrapper here (separated
516 by spaces). This is useful for targets that depend of device tree
517 files in the .dts directory.
518
519 Targets in this list will be build as part of the default build
520 target, or when the user does a 'make zImage' or a
521 'make zImage.initrd'.
522
523 If unsure, leave blank
524
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000525if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500526config ARCH_WANTS_FREEZER_CONTROL
527 def_bool y
528 depends on ADB_PMU
529
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000530source kernel/power/Kconfig
531endif
532
533config SECCOMP
534 bool "Enable seccomp to safely compute untrusted bytecode"
535 depends on PROC_FS
536 default y
537 help
538 This kernel feature is useful for number crunching applications
539 that may need to compute untrusted bytecode during their
540 execution. By using pipes or other transports made available to
541 the process as file descriptors supporting the read/write
542 syscalls, it's possible to isolate those applications in
543 their own address space using seccomp. Once seccomp is
544 enabled via /proc/<pid>/seccomp, it cannot be disabled
545 and the task is only allowed to execute a few safe syscalls
546 defined by each seccomp mode.
547
548 If unsure, say Y. Only embedded should say N here.
549
550endmenu
551
552config ISA_DMA_API
553 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100554 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000555
556menu "Bus options"
557
558config ISA
559 bool "Support for ISA-bus hardware"
560 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000561 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000562 help
563 Find out whether you have ISA slots on your motherboard. ISA is the
564 name of a bus system, i.e. the way the CPU talks to the other stuff
565 inside your box. If you have an Apple machine, say N here; if you
566 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
567 you have an embedded board, consult your board documentation.
568
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800569config ZONE_DMA
570 bool
571 default y
572
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000573config GENERIC_ISA_DMA
574 bool
575 depends on PPC64 || POWER4 || 6xx && !CPM2
576 default y
577
Paul Mackerras25635c72005-10-26 16:36:55 +1000578config PPC_INDIRECT_PCI
579 bool
580 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600581 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000582 default n
583
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000584config EISA
585 bool
586
587config SBUS
588 bool
589
Kumar Gala08264cb2006-01-10 21:43:56 -0600590config FSL_SOC
591 bool
592
Roy Zang55c44992007-07-10 18:44:34 +0800593config FSL_PCI
594 bool
595 select PPC_INDIRECT_PCI
596
Stefan Roese2a706912008-03-26 22:39:50 +1100597config 4xx_SOC
598 bool
599
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400600config FSL_LBC
601 bool
602 help
603 Freescale Localbus support
604
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400605config FSL_GTM
606 bool
607 depends on PPC_83xx || QUICC_ENGINE || CPM2
608 help
609 Freescale General-purpose Timers support
610
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000611# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
612config MCA
613 bool
614
John Rigbyb5005632008-06-26 11:07:56 -0600615# Platforms that what PCI turned unconditionally just do select PCI
616# in their config node. Platforms that want to choose at config
617# time should select PPC_PCI_CHOICE
618config PPC_PCI_CHOICE
619 bool
620
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000621config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600622 bool "PCI support" if PPC_PCI_CHOICE
623 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Jon Loeliger53158622006-08-09 10:37:28 -0500624 && !PPC_85xx && !PPC_86xx
David Gibsonf21f49e2007-06-13 14:52:54 +1000625 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000626 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000627 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000628 help
629 Find out whether your system includes a PCI bus. PCI is the name of
630 a bus system, i.e. the way the CPU talks to the other stuff inside
631 your box. If you say Y here, the kernel will include drivers and
632 infrastructure code to support PCI bus devices.
633
634config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600635 def_bool PCI
636
637config PCI_SYSCALL
638 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000639
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000640config PCI_QSPAN
641 bool "QSpan PCI"
642 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000643 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000644 help
645 Say Y here if you have a system based on a Motorola 8xx-series
646 embedded processor with a QSPAN PCI interface, otherwise say N.
647
648config PCI_8260
649 bool
650 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000651 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000652 default y
653
654config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700655 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500656 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000657 default y
658
659choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700660 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000661 depends on 8260_PCI9
662
663config 8260_PCI9_IDMA1
664 bool "IDMA1"
665
666config 8260_PCI9_IDMA2
667 bool "IDMA2"
668
669config 8260_PCI9_IDMA3
670 bool "IDMA3"
671
672config 8260_PCI9_IDMA4
673 bool "IDMA4"
674
675endchoice
676
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500677source "drivers/pci/pcie/Kconfig"
678
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000679source "drivers/pci/Kconfig"
680
681source "drivers/pcmcia/Kconfig"
682
683source "drivers/pci/hotplug/Kconfig"
684
Zhang Weif1f389d2008-04-18 13:33:39 -0700685config HAS_RAPIDIO
686 bool
687 default n
688
689config RAPIDIO
690 bool "RapidIO support"
691 depends on HAS_RAPIDIO
692 help
693 If you say Y here, the kernel will include drivers and
694 infrastructure code to support RapidIO interconnect devices.
695
696source "drivers/rapidio/Kconfig"
697
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000698endmenu
699
700menu "Advanced setup"
701 depends on PPC32
702
703config ADVANCED_OPTIONS
704 bool "Prompt for advanced kernel configuration options"
705 help
706 This option will enable prompting for a variety of advanced kernel
707 configuration options. These options can cause the kernel to not
708 work if they are set incorrectly, but can be used to optimize certain
709 aspects of kernel memory management.
710
711 Unless you know what you are doing, say N here.
712
713comment "Default settings for advanced configuration options are used"
714 depends on !ADVANCED_OPTIONS
715
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000716config LOWMEM_SIZE_BOOL
717 bool "Set maximum low memory"
718 depends on ADVANCED_OPTIONS
719 help
720 This option allows you to set the maximum amount of memory which
721 will be used as "low memory", that is, memory which the kernel can
722 access directly, without having to set up a kernel virtual mapping.
723 This can be useful in optimizing the layout of kernel virtual
724 memory.
725
726 Say N here unless you know what you are doing.
727
728config LOWMEM_SIZE
729 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
730 default "0x30000000"
731
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000732config RELOCATABLE
733 bool "Build a relocatable kernel (EXPERIMENTAL)"
734 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
735 help
736 This builds a kernel image that is capable of running at the
737 location the kernel is loaded at (some alignment restrictions may
738 exist).
739
740 One use is for the kexec on panic case where the recovery kernel
741 must live at a different physical address than the primary
742 kernel.
743
744 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
745 it has been loaded at and the compile time physical addresses
746 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
747 setting can still be useful to bootwrappers that need to know the
748 load location of the kernel (eg. u-boot/mkimage).
749
750config PAGE_OFFSET_BOOL
751 bool "Set custom page offset address"
752 depends on ADVANCED_OPTIONS
753 help
754 This option allows you to set the kernel virtual address at which
755 the kernel will map low memory. This can be useful in optimizing
756 the virtual memory layout of the system.
757
758 Say N here unless you know what you are doing.
759
760config PAGE_OFFSET
761 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
762 default "0xc0000000"
763
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000764config KERNEL_START_BOOL
765 bool "Set custom kernel base address"
766 depends on ADVANCED_OPTIONS
767 help
768 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000769 the kernel will be loaded. Normally this should match PAGE_OFFSET
770 however there are times (like kdump) that one might not want them
771 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000772
773 Say N here unless you know what you are doing.
774
775config KERNEL_START
776 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000777 default PAGE_OFFSET if PAGE_OFFSET_BOOL
778 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000779 default "0xc0000000"
780
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000781config PHYSICAL_START_BOOL
782 bool "Set physical address where the kernel is loaded"
783 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
784 help
785 This gives the physical address where the kernel is loaded.
786
787 Say N here unless you know what you are doing.
788
789config PHYSICAL_START
790 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
791 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
792 default "0x00000000"
793
794config PHYSICAL_ALIGN
795 hex
796 default "0x10000000" if FSL_BOOKE
797 help
798 This value puts the alignment restrictions on physical address
799 where kernel is loaded and run from. Kernel is compiled for an
800 address which meets above alignment restriction.
801
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000802config TASK_SIZE_BOOL
803 bool "Set custom user task size"
804 depends on ADVANCED_OPTIONS
805 help
806 This option allows you to set the amount of virtual address space
807 allocated to user tasks. This can be useful in optimizing the
808 virtual memory layout of the system.
809
810 Say N here unless you know what you are doing.
811
812config TASK_SIZE
813 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500814 default "0x80000000" if PPC_PREP || PPC_8xx
815 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000816
817config CONSISTENT_START_BOOL
818 bool "Set custom consistent memory pool address"
819 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
820 help
821 This option allows you to set the base virtual address
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200822 of the consistent memory pool. This pool of virtual
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000823 memory is used to make consistent memory allocations.
824
825config CONSISTENT_START
826 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
Scott Woodccf0d682007-07-16 11:28:18 -0500827 default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000828 default "0xff100000" if NOT_COHERENT_CACHE
829
830config CONSISTENT_SIZE_BOOL
831 bool "Set custom consistent memory pool size"
832 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
833 help
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200834 This option allows you to set the size of the
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000835 consistent memory pool. This pool of virtual memory
836 is used to make consistent memory allocations.
837
838config CONSISTENT_SIZE
839 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
840 default "0x00200000" if NOT_COHERENT_CACHE
841
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000842config PIN_TLB
843 bool "Pinned Kernel TLBs (860 ONLY)"
844 depends on ADVANCED_OPTIONS && 8xx
845endmenu
846
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000847if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000848config RELOCATABLE
849 bool "Build a relocatable kernel"
850 help
851 This builds a kernel image that is capable of running anywhere
852 in the RMA (real memory area) at any 16k-aligned base address.
853 The kernel is linked as a position-independent executable (PIE)
854 and contains dynamic relocations which are processed early
855 in the bootup process.
856
857 One use is for the kexec on panic case where the recovery kernel
858 must live at a different physical address than the primary
859 kernel.
860
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000861config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000862 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000863 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000864config KERNEL_START
865 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000866 default "0xc000000000000000"
867config PHYSICAL_START
868 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000869 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000870endif
871
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000872source "net/Kconfig"
873
874source "drivers/Kconfig"
875
876source "fs/Kconfig"
877
878# XXX source "arch/ppc/8xx_io/Kconfig"
879
880# XXX source "arch/ppc/8260_io/Kconfig"
881
Li Yang98658532006-10-03 23:10:46 -0500882source "arch/powerpc/sysdev/qe_lib/Kconfig"
883
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000884source "lib/Kconfig"
885
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000886source "arch/powerpc/Kconfig.debug"
887
888source "security/Kconfig"
889
890config KEYS_COMPAT
891 bool
892 depends on COMPAT && KEYS
893 default y
894
895source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000896
897config PPC_CLOCK
898 bool
899 default n
David Brownell9483a572008-07-23 21:26:48 -0700900 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000901
902config PPC_LIB_RHEAP
903 bool
904
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500905source "arch/powerpc/kvm/Kconfig"