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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
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100126 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000127
128config EARLY_PRINTK
129 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100130 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000131
132config COMPAT
133 bool
134 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800135 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000136
137config SYSVIPC_COMPAT
138 bool
139 depends on COMPAT && SYSVIPC
140 default y
141
142# All PPC32s use generic nvram driver through ppc_md
143config GENERIC_NVRAM
144 bool
145 default y if PPC32
146
Ingo Molnarae1e9132008-11-11 09:05:16 +0100147config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000148 bool
149 default y
150
151config ARCH_MAY_HAVE_PC_FDC
152 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100153 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000154
Kumar Gala08264cb2006-01-10 21:43:56 -0600155config PPC_OF
156 def_bool y
157
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000158config OF
159 def_bool y
160
Kumar Gala08264cb2006-01-10 21:43:56 -0600161config PPC_UDBG_16550
162 bool
163 default n
164
Kumar Gala08264cb2006-01-10 21:43:56 -0600165config GENERIC_TBSYNC
166 bool
167 default y if PPC32 && SMP
168 default n
169
Al Viroe65e1fc2006-09-12 03:04:40 -0400170config AUDIT_ARCH
171 bool
172 default y
173
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800174config GENERIC_BUG
175 bool
176 default y
177 depends on BUG
178
Johannes Bergb3028872007-03-20 05:18:02 +1100179config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500180 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100181 bool
182
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600183config DEFAULT_UIMAGE
184 bool
185 help
186 Used to allow a board to specify it wants a uImage built by default
187 default n
188
Scott Woodb09c1642008-01-17 16:31:40 -0600189config REDBOOT
190 bool
191
Johannes Berg801e4062007-12-08 02:12:39 +0100192config HIBERNATE_32
Johannes Berg543b9fd2007-05-03 22:31:38 +1000193 bool
Johannes Berg801e4062007-12-08 02:12:39 +0100194 depends on (PPC_PMAC && !SMP) || BROKEN
195 default y
196
197config HIBERNATE_64
198 bool
199 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
200 default y
201
202config ARCH_HIBERNATION_POSSIBLE
203 bool
204 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
Johannes Berg543b9fd2007-05-03 22:31:38 +1000205 default y
206
Johannes Bergf4cb5702007-12-08 02:14:00 +0100207config ARCH_SUSPEND_POSSIBLE
208 def_bool y
Scott Woodd49747b2007-10-09 12:37:13 -0500209 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100210
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100211config PPC_DCR_NATIVE
212 bool
213 default n
214
215config PPC_DCR_MMIO
216 bool
217 default n
218
219config PPC_DCR
220 bool
221 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
222 default y
223
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100224config PPC_OF_PLATFORM_PCI
225 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100226 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100227 depends on PPC64 # not supported on 32 bits yet
228 default n
229
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000230source "init/Kconfig"
231
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700232source "kernel/Kconfig.freezer"
233
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100234source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500235source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000236
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000237menu "Kernel options"
238
239config HIGHMEM
240 bool "High memory support"
241 depends on PPC32
242
Tony Breeds1ad74992007-09-21 13:26:03 +1000243source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000244source kernel/Kconfig.hz
245source kernel/Kconfig.preempt
246source "fs/Kconfig.binfmt"
247
Mel Gormanba72cb82007-11-28 16:21:13 -0800248config HUGETLB_PAGE_SIZE_VARIABLE
249 bool
250 depends on HUGETLB_PAGE
251 default y
252
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000253config MATH_EMULATION
254 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600255 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000256 ---help---
257 Some PowerPC chips designed for embedded applications do not have
258 a floating-point unit and therefore do not implement the
259 floating-point instructions in the PowerPC instruction set. If you
260 say Y here, the kernel will include code to emulate a floating-point
261 unit, which will allow programs that use floating-point
262 instructions to run.
263
Scott Wood5dd57a12007-09-18 15:29:35 -0500264config 8XX_MINIMAL_FPEMU
265 bool "Minimal math emulation for 8xx"
266 depends on 8xx && !MATH_EMULATION
267 help
268 Older arch/ppc kernels still emulated a few floating point
269 instructions such as load and store, even when full math
270 emulation is disabled. Say "Y" here if you want to preserve
271 this behavior.
272
273 It is recommended that you build a soft-float userspace instead.
274
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000275config IOMMU_VMERGE
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000276 bool "Enable IOMMU virtual merging"
277 depends on PPC64
278 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000279 help
280 Cause IO segments sent to a device for DMA to be merged virtually
281 by the IOMMU when they happen to have been allocated contiguously.
282 This doesn't add pressure to the IOMMU allocator. However, some
283 drivers don't support getting large merged segments coming back
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000284 from *_map_sg().
285
286 Most drivers don't have this problem; it is safe to say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000287
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800288config IOMMU_HELPER
289 def_bool PPC64
290
Becky Bruce15e09c02008-11-20 06:49:16 +0000291config PPC_NEED_DMA_SYNC_OPS
292 def_bool y
293 depends on NOT_COHERENT_CACHE
294
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000295config HOTPLUG_CPU
296 bool "Support for enabling/disabling CPUs"
297 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
298 ---help---
299 Say Y here to be able to disable and re-enable individual
300 CPUs at runtime on SMP machines.
301
302 Say N if you are unsure.
303
Yasunori Gotocc576372006-06-29 02:24:27 -0700304config ARCH_ENABLE_MEMORY_HOTPLUG
305 def_bool y
306
Badari Pulavartya99824f2008-02-05 00:10:18 -0800307config ARCH_HAS_WALK_MEMORY
308 def_bool y
309
Badari Pulavarty14824712008-02-05 00:10:17 -0800310config ARCH_ENABLE_MEMORY_HOTREMOVE
311 def_bool y
312
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000313config KEXEC
314 bool "kexec system call (EXPERIMENTAL)"
Dale Farnsworthfd4ba7e2007-05-12 10:58:43 +1000315 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000316 help
317 kexec is a system call that implements the ability to shutdown your
318 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400319 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000320 you can start any kernel with it, not just Linux.
321
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400322 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000323
324 It is an ongoing process to be certain the hardware in a machine
325 is properly shutdown, so do not be surprised if this code does not
326 initially work for you. It may help to enable device hotplugging
327 support. As of this writing the exact hardware interface is
328 strongly in flux, so no good recommendation can be made.
329
Haren Mynenie8625d462006-01-14 13:48:25 -0800330config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000331 bool "Build a kdump crash kernel"
Mohan Kumar Mc6ac71a2009-01-06 00:23:01 +0000332 depends on PPC64 || 6xx
333 select RELOCATABLE if PPC64
Haren Mynenie8625d462006-01-14 13:48:25 -0800334 help
335 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000336 The same kernel binary can be used as production kernel and dump
337 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800338
Manish Ahuja242f2712008-03-22 10:50:50 +1100339config PHYP_DUMP
340 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
341 depends on PPC_PSERIES && EXPERIMENTAL
342 help
343 Hypervisor-assisted dump is meant to be a kdump replacement
344 offering robustness and speed not possible without system
345 hypervisor assistence.
346
347 If unsure, say "N"
348
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000349config PPCBUG_NVRAM
350 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
351 default y if PPC_PREP
352
353config IRQ_ALL_CPUS
354 bool "Distribute interrupts on all CPUs by default"
355 depends on SMP && !MV64360
356 help
357 This option gives the kernel permission to distribute IRQs across
358 multiple CPUs. Saying N here will route all IRQs to the first
359 CPU. Generally saying Y is safe, although some problems have been
360 reported with SMP Power Macintoshes with this option enabled.
361
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700362config NUMA
363 bool "NUMA support"
364 depends on PPC64
365 default y if SMP && PPC_PSERIES
366
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700367config NODES_SHIFT
368 int
369 default "4"
370 depends on NEED_MULTIPLE_NODES
371
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000372config ARCH_SELECT_MEMORY_MODEL
373 def_bool y
374 depends on PPC64
375
376config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000377 def_bool y
378 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000379
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000380config ARCH_SPARSEMEM_ENABLE
381 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000382 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700383 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100384
385config ARCH_SPARSEMEM_DEFAULT
386 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100387 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000388
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700389config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000390 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700391
392source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000393
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800394config ARCH_MEMORY_PROBE
395 def_bool y
396 depends on MEMORY_HOTPLUG
397
Andy Whitcroft75167952006-10-21 10:24:14 -0700398# Some NUMA nodes have memory ranges that span
399# other nodes. Even though a pfn is valid and
400# between a node's start and end pfns, it may not
401# reside on that node. See memmap_init_zone()
402# for details.
403config NODES_SPAN_OTHER_NODES
404 def_bool y
405 depends on NEED_MULTIPLE_NODES
406
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000407config PPC_HAS_HASH_64K
408 bool
409 depends on PPC64
410 default n
411
Yuri Tikhonove1240122009-01-29 01:40:44 +0000412config STDBINUTILS
413 bool "Using standard binutils settings"
414 depends on 44x
415 default y
416 help
417 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
418 Note, that kernel will be able to run only those applications,
419 which had been compiled using binutils later than 2.17.50.0.3 with
420 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
421 the older binutils, you can patch them with a trivial patch, which
422 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
423
Ilya Yanokca9153a2008-12-11 04:55:41 +0300424choice
425 prompt "Page size"
426 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100427 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300428 Select the kernel logical page size. Increasing the page size
429 will reduce software overhead at each page boundary, allow
430 hardware prefetch mechanisms to be more effective, and allow
431 larger dma transfers increasing IO efficiency and reducing
432 overhead. However the utilization of memory will increase.
433 For example, each cached file will using a multiple of the
434 page size to hold its contents and the difference between the
435 end of file and the end of page is wasted.
436
437 Some dedicated systems, such as software raid serving with
438 accelerated calculations, have shown significant increases.
439
440 If you configure a 64 bit kernel for 64k pages but the
441 processor does not support them, then the kernel will simulate
442 them with 4k pages, loading them on demand, but with the
443 reduced software overhead and larger internal fragmentation.
444 For the 32 bit kernel, a large page option will not be offered
445 unless it is supported by the configured processor.
446
447 If unsure, choose 4K_PAGES.
448
449config PPC_4K_PAGES
450 bool "4k page size"
451
452config PPC_16K_PAGES
453 bool "16k page size" if 44x
454
455config PPC_64K_PAGES
456 bool "64k page size" if 44x || PPC_STD_MMU_64
457 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
458
Yuri Tikhonove1240122009-01-29 01:40:44 +0000459config PPC_256K_PAGES
460 bool "256k page size" if 44x
461 depends on !STDBINUTILS && (!SHMEM || BROKEN)
462 help
463 Make the page size 256k.
464
465 As the ELF standard only requires alignment to support page
466 sizes up to 64k, you will need to compile all of your user
467 space applications with a non-standard binutils settings
468 (see the STDBINUTILS description for details).
469
470 Say N unless you know what you are doing.
471
Ilya Yanokca9153a2008-12-11 04:55:41 +0300472endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100473
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000474config FORCE_MAX_ZONEORDER
475 int "Maximum zone order"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300476 range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
477 default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
478 range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
479 default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
480 range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
481 default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
482 range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
483 default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
Yuri Tikhonove1240122009-01-29 01:40:44 +0000484 range 5 64 if PPC_STD_MMU_32 && PPC_256K_PAGES
485 default "5" if PPC_STD_MMU_32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000486 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000487 default "11"
488 help
489 The kernel memory allocator divides physically contiguous memory
490 blocks into "zones", where each zone is a power of two number of
491 pages. This option selects the largest power of two that the kernel
492 keeps in the memory allocator. If you need to allocate very large
493 blocks of physically contiguous memory, then you may need to
494 increase this value.
495
496 This config option is actually maximum order plus one. For example,
497 a value of 11 means that the largest free memory block is 2^10 pages.
498
499 The page size is not necessarily 4KB. For example, on 64-bit
500 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
501 this in mind when choosing a value for this option.
502
Paul Mackerrasfa282372008-01-24 08:35:13 +1100503config PPC_SUBPAGE_PROT
504 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300505 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100506 help
507 This option adds support for a system call to allow user programs
508 to set access permissions (read/write, readonly, or no access)
509 on the 4k subpages of each 64k page.
510
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000511config SCHED_SMT
512 bool "SMT (Hyperthreading) scheduler support"
513 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000514 help
515 SMT scheduler support improves the CPU scheduler's decision making
516 when dealing with POWER5 cpus at a cost of slightly increased
517 overhead in some places. If unsure say N here.
518
519config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000520 bool "Support for device tree in /proc"
521 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000522 help
523 This option adds a device-tree directory under /proc which contains
524 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000525 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000526
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000527config CMDLINE_BOOL
528 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000529
530config CMDLINE
531 string "Initial kernel command string"
532 depends on CMDLINE_BOOL
533 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
534 help
535 On some platforms, there is currently no way for the boot loader to
536 pass arguments to the kernel. For these platforms, you can supply
537 some command-line options at build time by entering them here. In
538 most cases you will need to specify the root device here.
539
Grant Likelyc356aa42008-07-09 09:41:52 -0600540config EXTRA_TARGETS
541 string "Additional default image types"
542 help
543 List additional targets to be built by the bootwrapper here (separated
544 by spaces). This is useful for targets that depend of device tree
545 files in the .dts directory.
546
547 Targets in this list will be build as part of the default build
548 target, or when the user does a 'make zImage' or a
549 'make zImage.initrd'.
550
551 If unsure, leave blank
552
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000553if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500554config ARCH_WANTS_FREEZER_CONTROL
555 def_bool y
556 depends on ADB_PMU
557
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000558source kernel/power/Kconfig
559endif
560
561config SECCOMP
562 bool "Enable seccomp to safely compute untrusted bytecode"
563 depends on PROC_FS
564 default y
565 help
566 This kernel feature is useful for number crunching applications
567 that may need to compute untrusted bytecode during their
568 execution. By using pipes or other transports made available to
569 the process as file descriptors supporting the read/write
570 syscalls, it's possible to isolate those applications in
571 their own address space using seccomp. Once seccomp is
572 enabled via /proc/<pid>/seccomp, it cannot be disabled
573 and the task is only allowed to execute a few safe syscalls
574 defined by each seccomp mode.
575
576 If unsure, say Y. Only embedded should say N here.
577
578endmenu
579
580config ISA_DMA_API
581 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100582 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000583
584menu "Bus options"
585
586config ISA
587 bool "Support for ISA-bus hardware"
588 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000589 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000590 help
591 Find out whether you have ISA slots on your motherboard. ISA is the
592 name of a bus system, i.e. the way the CPU talks to the other stuff
593 inside your box. If you have an Apple machine, say N here; if you
594 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
595 you have an embedded board, consult your board documentation.
596
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800597config ZONE_DMA
598 bool
599 default y
600
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000601config GENERIC_ISA_DMA
602 bool
603 depends on PPC64 || POWER4 || 6xx && !CPM2
604 default y
605
Paul Mackerras25635c72005-10-26 16:36:55 +1000606config PPC_INDIRECT_PCI
607 bool
608 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600609 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000610 default n
611
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000612config EISA
613 bool
614
615config SBUS
616 bool
617
Kumar Gala08264cb2006-01-10 21:43:56 -0600618config FSL_SOC
619 bool
620
Roy Zang55c44992007-07-10 18:44:34 +0800621config FSL_PCI
622 bool
623 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600624 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800625
Stefan Roese2a706912008-03-26 22:39:50 +1100626config 4xx_SOC
627 bool
628
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400629config FSL_LBC
630 bool
631 help
632 Freescale Localbus support
633
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400634config FSL_GTM
635 bool
636 depends on PPC_83xx || QUICC_ENGINE || CPM2
637 help
638 Freescale General-purpose Timers support
639
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000640# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
641config MCA
642 bool
643
John Rigbyb5005632008-06-26 11:07:56 -0600644# Platforms that what PCI turned unconditionally just do select PCI
645# in their config node. Platforms that want to choose at config
646# time should select PPC_PCI_CHOICE
647config PPC_PCI_CHOICE
648 bool
649
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000650config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600651 bool "PCI support" if PPC_PCI_CHOICE
652 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Jon Loeliger53158622006-08-09 10:37:28 -0500653 && !PPC_85xx && !PPC_86xx
David Gibsonf21f49e2007-06-13 14:52:54 +1000654 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000655 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000656 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000657 help
658 Find out whether your system includes a PCI bus. PCI is the name of
659 a bus system, i.e. the way the CPU talks to the other stuff inside
660 your box. If you say Y here, the kernel will include drivers and
661 infrastructure code to support PCI bus devices.
662
663config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600664 def_bool PCI
665
666config PCI_SYSCALL
667 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000668
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000669config PCI_QSPAN
670 bool "QSpan PCI"
671 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000672 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000673 help
674 Say Y here if you have a system based on a Motorola 8xx-series
675 embedded processor with a QSPAN PCI interface, otherwise say N.
676
677config PCI_8260
678 bool
679 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000680 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000681 default y
682
683config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700684 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500685 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000686 default y
687
688choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700689 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000690 depends on 8260_PCI9
691
692config 8260_PCI9_IDMA1
693 bool "IDMA1"
694
695config 8260_PCI9_IDMA2
696 bool "IDMA2"
697
698config 8260_PCI9_IDMA3
699 bool "IDMA3"
700
701config 8260_PCI9_IDMA4
702 bool "IDMA4"
703
704endchoice
705
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500706source "drivers/pci/pcie/Kconfig"
707
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000708source "drivers/pci/Kconfig"
709
710source "drivers/pcmcia/Kconfig"
711
712source "drivers/pci/hotplug/Kconfig"
713
Zhang Weif1f389d2008-04-18 13:33:39 -0700714config HAS_RAPIDIO
715 bool
716 default n
717
718config RAPIDIO
719 bool "RapidIO support"
720 depends on HAS_RAPIDIO
721 help
722 If you say Y here, the kernel will include drivers and
723 infrastructure code to support RapidIO interconnect devices.
724
725source "drivers/rapidio/Kconfig"
726
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000727endmenu
728
729menu "Advanced setup"
730 depends on PPC32
731
732config ADVANCED_OPTIONS
733 bool "Prompt for advanced kernel configuration options"
734 help
735 This option will enable prompting for a variety of advanced kernel
736 configuration options. These options can cause the kernel to not
737 work if they are set incorrectly, but can be used to optimize certain
738 aspects of kernel memory management.
739
740 Unless you know what you are doing, say N here.
741
742comment "Default settings for advanced configuration options are used"
743 depends on !ADVANCED_OPTIONS
744
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000745config LOWMEM_SIZE_BOOL
746 bool "Set maximum low memory"
747 depends on ADVANCED_OPTIONS
748 help
749 This option allows you to set the maximum amount of memory which
750 will be used as "low memory", that is, memory which the kernel can
751 access directly, without having to set up a kernel virtual mapping.
752 This can be useful in optimizing the layout of kernel virtual
753 memory.
754
755 Say N here unless you know what you are doing.
756
757config LOWMEM_SIZE
758 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
759 default "0x30000000"
760
Trent Piepho96051462008-12-08 19:34:58 -0800761config LOWMEM_CAM_NUM_BOOL
762 bool "Set number of CAMs to use to map low memory"
763 depends on ADVANCED_OPTIONS && FSL_BOOKE
764 help
765 This option allows you to set the maximum number of CAM slots that
766 will be used to map low memory. There are a limited number of slots
767 available and even more limited number that will fit in the L1 MMU.
768 However, using more entries will allow mapping more low memory. This
769 can be useful in optimizing the layout of kernel virtual memory.
770
771 Say N here unless you know what you are doing.
772
773config LOWMEM_CAM_NUM
774 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
775 default 3
776
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000777config RELOCATABLE
778 bool "Build a relocatable kernel (EXPERIMENTAL)"
779 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
780 help
781 This builds a kernel image that is capable of running at the
782 location the kernel is loaded at (some alignment restrictions may
783 exist).
784
785 One use is for the kexec on panic case where the recovery kernel
786 must live at a different physical address than the primary
787 kernel.
788
789 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
790 it has been loaded at and the compile time physical addresses
791 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
792 setting can still be useful to bootwrappers that need to know the
793 load location of the kernel (eg. u-boot/mkimage).
794
795config PAGE_OFFSET_BOOL
796 bool "Set custom page offset address"
797 depends on ADVANCED_OPTIONS
798 help
799 This option allows you to set the kernel virtual address at which
800 the kernel will map low memory. This can be useful in optimizing
801 the virtual memory layout of the system.
802
803 Say N here unless you know what you are doing.
804
805config PAGE_OFFSET
806 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
807 default "0xc0000000"
808
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000809config KERNEL_START_BOOL
810 bool "Set custom kernel base address"
811 depends on ADVANCED_OPTIONS
812 help
813 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000814 the kernel will be loaded. Normally this should match PAGE_OFFSET
815 however there are times (like kdump) that one might not want them
816 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000817
818 Say N here unless you know what you are doing.
819
820config KERNEL_START
821 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000822 default PAGE_OFFSET if PAGE_OFFSET_BOOL
823 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000824 default "0xc0000000"
825
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000826config PHYSICAL_START_BOOL
827 bool "Set physical address where the kernel is loaded"
828 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
829 help
830 This gives the physical address where the kernel is loaded.
831
832 Say N here unless you know what you are doing.
833
834config PHYSICAL_START
835 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
836 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
837 default "0x00000000"
838
839config PHYSICAL_ALIGN
840 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800841 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000842 help
843 This value puts the alignment restrictions on physical address
844 where kernel is loaded and run from. Kernel is compiled for an
845 address which meets above alignment restriction.
846
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000847config TASK_SIZE_BOOL
848 bool "Set custom user task size"
849 depends on ADVANCED_OPTIONS
850 help
851 This option allows you to set the amount of virtual address space
852 allocated to user tasks. This can be useful in optimizing the
853 virtual memory layout of the system.
854
855 Say N here unless you know what you are doing.
856
857config TASK_SIZE
858 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500859 default "0x80000000" if PPC_PREP || PPC_8xx
860 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000861
862config CONSISTENT_START_BOOL
863 bool "Set custom consistent memory pool address"
864 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
865 help
866 This option allows you to set the base virtual address
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200867 of the consistent memory pool. This pool of virtual
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000868 memory is used to make consistent memory allocations.
869
870config CONSISTENT_START
871 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
Scott Woodccf0d682007-07-16 11:28:18 -0500872 default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000873 default "0xff100000" if NOT_COHERENT_CACHE
874
875config CONSISTENT_SIZE_BOOL
876 bool "Set custom consistent memory pool size"
877 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
878 help
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200879 This option allows you to set the size of the
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000880 consistent memory pool. This pool of virtual memory
881 is used to make consistent memory allocations.
882
883config CONSISTENT_SIZE
884 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
885 default "0x00200000" if NOT_COHERENT_CACHE
886
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000887config PIN_TLB
888 bool "Pinned Kernel TLBs (860 ONLY)"
889 depends on ADVANCED_OPTIONS && 8xx
890endmenu
891
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000892if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000893config RELOCATABLE
894 bool "Build a relocatable kernel"
895 help
896 This builds a kernel image that is capable of running anywhere
897 in the RMA (real memory area) at any 16k-aligned base address.
898 The kernel is linked as a position-independent executable (PIE)
899 and contains dynamic relocations which are processed early
900 in the bootup process.
901
902 One use is for the kexec on panic case where the recovery kernel
903 must live at a different physical address than the primary
904 kernel.
905
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000906config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000907 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000908 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000909config KERNEL_START
910 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000911 default "0xc000000000000000"
912config PHYSICAL_START
913 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000914 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000915endif
916
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000917source "net/Kconfig"
918
919source "drivers/Kconfig"
920
921source "fs/Kconfig"
922
Li Yang98658532006-10-03 23:10:46 -0500923source "arch/powerpc/sysdev/qe_lib/Kconfig"
924
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000925source "lib/Kconfig"
926
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000927source "arch/powerpc/Kconfig.debug"
928
929source "security/Kconfig"
930
931config KEYS_COMPAT
932 bool
933 depends on COMPAT && KEYS
934 default y
935
936source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000937
938config PPC_CLOCK
939 bool
940 default n
David Brownell9483a572008-07-23 21:26:48 -0700941 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000942
943config PPC_LIB_RHEAP
944 bool
945
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500946source "arch/powerpc/kvm/Kconfig"