blob: ecd459dd1baf482dfd63c3aaa66d495380a44581 [file] [log] [blame]
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
7config PPC64
8 bool "64-bit kernel"
9 default n
10 help
11 This option selects whether a 32-bit or a 64-bit kernel
12 will be built.
13
Johannes Berg17e638b2007-03-19 11:53:53 +010014config PPC_PM_NEEDS_RTC_LIB
15 bool
16 select RTC_LIB
17 default y if PM
18
Paul Mackerras14cf11a2005-09-26 16:04:21 +100019config PPC32
20 bool
21 default y if !PPC64
22
23config 64BIT
24 bool
25 default y if PPC64
26
27config PPC_MERGE
28 def_bool y
29
30config MMU
31 bool
32 default y
33
Paul Mackerras14cf11a2005-09-26 16:04:21 +100034config GENERIC_HARDIRQS
35 bool
36 default y
37
Ingo Molnar0d7012a2006-06-29 02:24:43 -070038config IRQ_PER_CPU
39 bool
40 default y
41
Paul Mackerras14cf11a2005-09-26 16:04:21 +100042config RWSEM_GENERIC_SPINLOCK
43 bool
44
45config RWSEM_XCHGADD_ALGORITHM
46 bool
47 default y
48
David Howellsf0d1b0b2006-12-08 02:37:49 -080049config ARCH_HAS_ILOG2_U32
50 bool
David Howellsef55d532006-12-08 02:37:53 -080051 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080052
53config ARCH_HAS_ILOG2_U64
54 bool
David Howellsef55d532006-12-08 02:37:53 -080055 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080056
Akinobu Mitae779b2f2006-03-26 01:39:33 -080057config GENERIC_HWEIGHT
58 bool
59 default y
60
Paul Mackerras14cf11a2005-09-26 16:04:21 +100061config GENERIC_CALIBRATE_DELAY
62 bool
63 default y
64
Jon Mason0a9cb462006-05-19 15:35:32 -050065config GENERIC_FIND_NEXT_BIT
66 bool
67 default y
68
Paul Mackerras14cf11a2005-09-26 16:04:21 +100069config PPC
70 bool
71 default y
72
73config EARLY_PRINTK
74 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +110075 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +100076
77config COMPAT
78 bool
79 default y if PPC64
80
81config SYSVIPC_COMPAT
82 bool
83 depends on COMPAT && SYSVIPC
84 default y
85
86# All PPC32s use generic nvram driver through ppc_md
87config GENERIC_NVRAM
88 bool
89 default y if PPC32
90
91config SCHED_NO_NO_OMIT_FRAME_POINTER
92 bool
93 default y
94
95config ARCH_MAY_HAVE_PC_FDC
96 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +110097 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +100098
Kumar Gala08264cb2006-01-10 21:43:56 -060099config PPC_OF
100 def_bool y
101
102config PPC_UDBG_16550
103 bool
104 default n
105
Kumar Gala08264cb2006-01-10 21:43:56 -0600106config GENERIC_TBSYNC
107 bool
108 default y if PPC32 && SMP
109 default n
110
Al Viroe65e1fc2006-09-12 03:04:40 -0400111config AUDIT_ARCH
112 bool
113 default y
114
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800115config GENERIC_BUG
116 bool
117 default y
118 depends on BUG
119
Johannes Bergb3028872007-03-20 05:18:02 +1100120config SYS_SUPPORTS_APM_EMULATION
121 bool
122
Christoph Lameter30520862007-05-06 14:49:38 -0700123#
124# Powerpc uses the slab allocator to manage its ptes and the
125# page structs of ptes are used for splitting the page table
126# lock for configurations supporting more than SPLIT_PTLOCK_CPUS.
127#
128# In that special configuration the page structs of slabs are modified.
129# This setting disables the selection of SLUB as a slab allocator.
130#
131config ARCH_USES_SLAB_PAGE_STRUCT
132 bool
133 default y
134 depends on SPLIT_PTLOCK_CPUS <= NR_CPUS
135
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600136config DEFAULT_UIMAGE
137 bool
138 help
139 Used to allow a board to specify it wants a uImage built by default
140 default n
141
Johannes Berg543b9fd2007-05-03 22:31:38 +1000142config PPC64_SWSUSP
143 bool
144 depends on PPC64 && (BROKEN || (PPC_PMAC64 && EXPERIMENTAL))
145 default y
146
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000147menu "Processor support"
148choice
149 prompt "Processor Type"
150 depends on PPC32
151 default 6xx
152
Kumar Gala08264cb2006-01-10 21:43:56 -0600153config CLASSIC32
Grant Likely650f3282006-12-04 17:29:13 -0700154 bool "52xx/6xx/7xx/74xx"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000155 select PPC_FPU
Kumar Gala08264cb2006-01-10 21:43:56 -0600156 select 6xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000157 help
158 There are four families of PowerPC chips supported. The more common
159 types (601, 603, 604, 740, 750, 7400), the Motorola embedded
160 versions (821, 823, 850, 855, 860, 52xx, 82xx, 83xx), the AMCC
161 embedded versions (403 and 405) and the high end 64 bit Power
162 processors (POWER 3, POWER4, and IBM PPC970 also known as G5).
Grant Likely650f3282006-12-04 17:29:13 -0700163
164 This option is the catch-all for 6xx types, including some of the
165 embedded versions. Unless there is see an option for the specific
166 chip family you are using, you want this option.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000167
Grant Likely650f3282006-12-04 17:29:13 -0700168 You do not want this if you are building a kernel for a 64 bit
169 IBM RS/6000 or an Apple G5, choose 6xx.
170
171 If unsure, select this option
172
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000173 Note that the kernel runs in 32-bit mode even on 64-bit chips.
174
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000175config PPC_82xx
176 bool "Freescale 82xx"
Kumar Gala08264cb2006-01-10 21:43:56 -0600177 select 6xx
178 select PPC_FPU
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000179
180config PPC_83xx
181 bool "Freescale 83xx"
Kumar Gala08264cb2006-01-10 21:43:56 -0600182 select 6xx
183 select FSL_SOC
184 select 83xx
185 select PPC_FPU
Scott Wood270429b2007-04-17 09:24:51 +1000186 select WANT_DEVICE_TREE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000187
Becky Bruce63dafe52006-01-14 16:57:39 -0600188config PPC_85xx
189 bool "Freescale 85xx"
190 select E500
191 select FSL_SOC
192 select 85xx
Scott Wood4536b932007-04-27 03:09:01 +1000193 select WANT_DEVICE_TREE
Becky Bruce63dafe52006-01-14 16:57:39 -0600194
Jon Loeligerc9b484b2006-06-17 17:52:35 -0500195config PPC_86xx
196 bool "Freescale 86xx"
197 select 6xx
198 select FSL_SOC
Jon Loeliger3e4e97f2007-03-07 14:48:45 -0600199 select FSL_PCIE
Jon Loeligerc9b484b2006-06-17 17:52:35 -0500200 select PPC_FPU
201 select ALTIVEC
202 help
203 The Freescale E600 SoCs have 74xx cores.
204
Vitaly Bordug5902ebc2007-01-24 22:41:06 +0300205config PPC_8xx
206 bool "Freescale 8xx"
207 select FSL_SOC
208 select 8xx
209
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000210config 40x
211 bool "AMCC 40x"
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100212 select PPC_DCR_NATIVE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000213
214config 44x
215 bool "AMCC 44x"
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100216 select PPC_DCR_NATIVE
David Gibsonf6dfc802007-05-08 14:10:01 +1000217 select WANT_DEVICE_TREE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000218
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000219config E200
220 bool "Freescale e200"
221
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000222endchoice
223
224config POWER4_ONLY
225 bool "Optimize for POWER4"
Paul Mackerras187a0062005-10-06 12:49:05 +1000226 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000227 default n
228 ---help---
229 Cause the compiler to optimize for POWER4/POWER5/PPC970 processors.
230 The resulting binary will not work on POWER3 or RS64 processors
231 when compiled with binutils 2.15 or later.
232
233config POWER3
234 bool
Paul Mackerras187a0062005-10-06 12:49:05 +1000235 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000236 default y if !POWER4_ONLY
237
238config POWER4
Paul Mackerras187a0062005-10-06 12:49:05 +1000239 depends on PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000240 def_bool y
241
Kumar Gala08264cb2006-01-10 21:43:56 -0600242config 6xx
243 bool
244
245# this is temp to handle compat with arch=ppc
Vitaly Bordug5902ebc2007-01-24 22:41:06 +0300246config 8xx
247 bool
248
249# this is temp to handle compat with arch=ppc
Kumar Gala08264cb2006-01-10 21:43:56 -0600250config 83xx
251 bool
252
Becky Bruce63dafe52006-01-14 16:57:39 -0600253# this is temp to handle compat with arch=ppc
254config 85xx
255 bool
256
257config E500
258 bool
259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000260config PPC_FPU
Paul Mackerras187a0062005-10-06 12:49:05 +1000261 bool
262 default y if PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000263
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100264config PPC_DCR_NATIVE
265 bool
266 default n
267
268config PPC_DCR_MMIO
269 bool
270 default n
271
272config PPC_DCR
273 bool
274 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
275 default y
276
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100277config PPC_OF_PLATFORM_PCI
278 bool
279 depends on PPC64 # not supported on 32 bits yet
280 default n
281
David Gibsonf6dfc802007-05-08 14:10:01 +1000282config 4xx
283 bool
284 depends on 40x || 44x
285 default y
286
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000287config BOOKE
288 bool
David Gibsonf6dfc802007-05-08 14:10:01 +1000289 depends on E200 || E500 || 44x
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000290 default y
291
292config FSL_BOOKE
293 bool
294 depends on E200 || E500
295 default y
296
297config PTE_64BIT
298 bool
299 depends on 44x || E500
300 default y if 44x
301 default y if E500 && PHYS_64BIT
302
303config PHYS_64BIT
304 bool 'Large physical address support' if E500
305 depends on 44x || E500
Benjamin Herrenschmidt3d1ea8e2006-11-11 17:25:19 +1100306 select RESOURCES_64BIT
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000307 default y if 44x
308 ---help---
309 This option enables kernel support for larger than 32-bit physical
310 addresses. This features is not be available on all e500 cores.
311
312 If in doubt, say N here.
313
314config ALTIVEC
315 bool "AltiVec Support"
Kumar Gala08264cb2006-01-10 21:43:56 -0600316 depends on CLASSIC32 || POWER4
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000317 ---help---
318 This option enables kernel support for the Altivec extensions to the
319 PowerPC processor. The kernel currently supports saving and restoring
320 altivec registers, and turning on the 'altivec enable' bit so user
321 processes can execute altivec instructions.
322
323 This option is only usefully if you have a processor that supports
324 altivec (G4, otherwise known as 74xx series), but does not have
325 any affect on a non-altivec cpu (it does, however add code to the
326 kernel).
327
328 If in doubt, say Y here.
329
330config SPE
331 bool "SPE Support"
332 depends on E200 || E500
Becky Bruce63dafe52006-01-14 16:57:39 -0600333 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000334 ---help---
335 This option enables kernel support for the Signal Processing
336 Extensions (SPE) to the PowerPC processor. The kernel currently
337 supports saving and restoring SPE registers, and turning on the
338 'spe enable' bit so user processes can execute SPE instructions.
339
340 This option is only useful if you have a processor that supports
341 SPE (e500, otherwise known as 85xx series), but does not have any
342 effect on a non-spe cpu (it does, however add code to the kernel).
343
344 If in doubt, say Y here.
345
346config PPC_STD_MMU
347 bool
348 depends on 6xx || POWER3 || POWER4 || PPC64
349 default y
350
351config PPC_STD_MMU_32
352 def_bool y
353 depends on PPC_STD_MMU && PPC32
354
Benjamin Herrenschmidtd0f13e32007-05-08 16:27:27 +1000355config PPC_MM_SLICES
356 bool
357 default y if HUGETLB_PAGE
358 default n
359
Paul Mackerrasc6622f62006-02-24 10:06:59 +1100360config VIRT_CPU_ACCOUNTING
361 bool "Deterministic task and CPU time accounting"
362 depends on PPC64
363 default y
364 help
365 Select this option to enable more accurate task and CPU time
366 accounting. This is done by reading a CPU counter on each
367 kernel entry and exit and on transitions within the kernel
368 between system, softirq and hardirq state, so there is a
369 small performance impact. This also enables accounting of
370 stolen time on logically-partitioned systems running on
371 IBM POWER5-based machines.
372
373 If in doubt, say Y here.
374
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000375config SMP
376 depends on PPC_STD_MMU
377 bool "Symmetric multi-processing support"
378 ---help---
379 This enables support for systems with more than one CPU. If you have
380 a system with only one CPU, say N. If you have a system with more
381 than one CPU, say Y. Note that the kernel does not currently
382 support SMP machines with 603/603e/603ev or PPC750 ("G3") processors
383 since they have inadequate hardware support for multiprocessor
384 operation.
385
386 If you say N here, the kernel will run on single and multiprocessor
387 machines, but will use only one CPU of a multiprocessor machine. If
388 you say Y here, the kernel will run on single-processor machines.
389 On a single-processor machine, the kernel will run faster if you say
390 N here.
391
392 If you don't know what to do here, say N.
393
394config NR_CPUS
Olaf Heringe8a167a2005-12-01 21:10:10 +0100395 int "Maximum number of CPUs (2-128)"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000396 range 2 128
397 depends on SMP
398 default "32" if PPC64
399 default "4"
400
401config NOT_COHERENT_CACHE
402 bool
403 depends on 4xx || 8xx || E200
404 default y
405endmenu
406
407source "init/Kconfig"
408
Kumar Gala4330f5d2007-03-16 09:32:17 -0500409source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000410
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000411menu "Kernel options"
412
413config HIGHMEM
414 bool "High memory support"
415 depends on PPC32
416
417source kernel/Kconfig.hz
418source kernel/Kconfig.preempt
419source "fs/Kconfig.binfmt"
420
421# We optimistically allocate largepages from the VM, so make the limit
422# large enough (16MB). This badly named config option is actually
423# max order + 1
424config FORCE_MAX_ZONEORDER
425 int
426 depends on PPC64
Mike Kravetz02864862005-11-07 13:48:59 -0800427 default "9" if PPC_64K_PAGES
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000428 default "13"
429
430config MATH_EMULATION
431 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600432 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000433 ---help---
434 Some PowerPC chips designed for embedded applications do not have
435 a floating-point unit and therefore do not implement the
436 floating-point instructions in the PowerPC instruction set. If you
437 say Y here, the kernel will include code to emulate a floating-point
438 unit, which will allow programs that use floating-point
439 instructions to run.
440
441config IOMMU_VMERGE
442 bool "Enable IOMMU virtual merging (EXPERIMENTAL)"
443 depends on EXPERIMENTAL && PPC64
444 default n
445 help
446 Cause IO segments sent to a device for DMA to be merged virtually
447 by the IOMMU when they happen to have been allocated contiguously.
448 This doesn't add pressure to the IOMMU allocator. However, some
449 drivers don't support getting large merged segments coming back
450 from *_map_sg(). Say Y if you know the drivers you are using are
451 properly handling this case.
452
453config HOTPLUG_CPU
454 bool "Support for enabling/disabling CPUs"
455 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
456 ---help---
457 Say Y here to be able to disable and re-enable individual
458 CPUs at runtime on SMP machines.
459
460 Say N if you are unsure.
461
Yasunori Gotocc576372006-06-29 02:24:27 -0700462config ARCH_ENABLE_MEMORY_HOTPLUG
463 def_bool y
464
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000465config KEXEC
466 bool "kexec system call (EXPERIMENTAL)"
467 depends on PPC_MULTIPLATFORM && EXPERIMENTAL
468 help
469 kexec is a system call that implements the ability to shutdown your
470 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400471 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000472 you can start any kernel with it, not just Linux.
473
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400474 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000475
476 It is an ongoing process to be certain the hardware in a machine
477 is properly shutdown, so do not be surprised if this code does not
478 initially work for you. It may help to enable device hotplugging
479 support. As of this writing the exact hardware interface is
480 strongly in flux, so no good recommendation can be made.
481
Haren Mynenie8625d462006-01-14 13:48:25 -0800482config CRASH_DUMP
Michael Ellermancd9c99d2006-03-10 15:01:08 +1100483 bool "Build a kdump crash kernel (EXPERIMENTAL)"
Haren Mynenie8625d462006-01-14 13:48:25 -0800484 depends on PPC_MULTIPLATFORM && PPC64 && EXPERIMENTAL
485 help
486 Build a kernel suitable for use as a kdump capture kernel.
487 The kernel will be linked at a different address than normal, and
488 so can only be used for Kdump.
489
490 Don't change this unless you know what you are doing.
491
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000492config PPCBUG_NVRAM
493 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
494 default y if PPC_PREP
495
496config IRQ_ALL_CPUS
497 bool "Distribute interrupts on all CPUs by default"
498 depends on SMP && !MV64360
499 help
500 This option gives the kernel permission to distribute IRQs across
501 multiple CPUs. Saying N here will route all IRQs to the first
502 CPU. Generally saying Y is safe, although some problems have been
503 reported with SMP Power Macintoshes with this option enabled.
504
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700505config NUMA
506 bool "NUMA support"
507 depends on PPC64
508 default y if SMP && PPC_PSERIES
509
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700510config NODES_SHIFT
511 int
512 default "4"
513 depends on NEED_MULTIPLE_NODES
514
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000515config ARCH_SELECT_MEMORY_MODEL
516 def_bool y
517 depends on PPC64
518
519config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000520 def_bool y
521 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000522
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000523config ARCH_SPARSEMEM_ENABLE
524 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000525 depends on PPC64
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100526
527config ARCH_SPARSEMEM_DEFAULT
528 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100529 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000530
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700531config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000532 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700533
534source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000535
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800536config ARCH_MEMORY_PROBE
537 def_bool y
538 depends on MEMORY_HOTPLUG
539
Andy Whitcroft75167952006-10-21 10:24:14 -0700540# Some NUMA nodes have memory ranges that span
541# other nodes. Even though a pfn is valid and
542# between a node's start and end pfns, it may not
543# reside on that node. See memmap_init_zone()
544# for details.
545config NODES_SPAN_OTHER_NODES
546 def_bool y
547 depends on NEED_MULTIPLE_NODES
548
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000549config PPC_HAS_HASH_64K
550 bool
551 depends on PPC64
552 default n
553
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100554config PPC_64K_PAGES
555 bool "64k page size"
Benjamin Herrenschmidt863c84b2005-11-07 00:57:58 -0800556 depends on PPC64
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000557 select PPC_HAS_HASH_64K
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100558 help
559 This option changes the kernel logical page size to 64k. On machines
Kumar Gala98750262007-04-12 18:01:34 -0500560 without processor support for 64k pages, the kernel will simulate
561 them by loading each individual 4k page on demand transparently,
562 while on hardware with such support, it will be used to map
563 normal application pages.
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100564
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000565config SCHED_SMT
566 bool "SMT (Hyperthreading) scheduler support"
567 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000568 help
569 SMT scheduler support improves the CPU scheduler's decision making
570 when dealing with POWER5 cpus at a cost of slightly increased
571 overhead in some places. If unsure say N here.
572
573config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000574 bool "Support for device tree in /proc"
575 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000576 help
577 This option adds a device-tree directory under /proc which contains
578 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000579 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000580
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000581config CMDLINE_BOOL
582 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000583
584config CMDLINE
585 string "Initial kernel command string"
586 depends on CMDLINE_BOOL
587 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
588 help
589 On some platforms, there is currently no way for the boot loader to
590 pass arguments to the kernel. For these platforms, you can supply
591 some command-line options at build time by entering them here. In
592 most cases you will need to specify the root device here.
593
594if !44x || BROKEN
595source kernel/power/Kconfig
596endif
597
598config SECCOMP
599 bool "Enable seccomp to safely compute untrusted bytecode"
600 depends on PROC_FS
601 default y
602 help
603 This kernel feature is useful for number crunching applications
604 that may need to compute untrusted bytecode during their
605 execution. By using pipes or other transports made available to
606 the process as file descriptors supporting the read/write
607 syscalls, it's possible to isolate those applications in
608 their own address space using seccomp. Once seccomp is
609 enabled via /proc/<pid>/seccomp, it cannot be disabled
610 and the task is only allowed to execute a few safe syscalls
611 defined by each seccomp mode.
612
613 If unsure, say Y. Only embedded should say N here.
614
Scott Wood270429b2007-04-17 09:24:51 +1000615config WANT_DEVICE_TREE
616 bool
617 default n
618
619config DEVICE_TREE
620 string "Static device tree source file"
621 depends on WANT_DEVICE_TREE
622 help
623 This specifies the device tree source (.dts) file to be
624 compiled and included when building the bootwrapper. If a
625 relative filename is given, then it will be relative to
626 arch/powerpc/boot/dts. If you are not using the bootwrapper,
627 or do not need to build a dts into the bootwrapper, this
628 field is ignored.
629
630 For example, this is required when building a cuImage target
631 for an older U-Boot, which cannot pass a device tree itself.
632 Such a kernel will not work with a newer U-Boot that tries to
633 pass a device tree (unless you tell it not to). If your U-Boot
634 does not mention a device tree in "help bootm", then use the
635 cuImage target and specify a device tree here. Otherwise, use
636 the uImage target and leave this field blank.
637
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000638endmenu
639
640config ISA_DMA_API
641 bool
642 default y
643
644menu "Bus options"
645
646config ISA
647 bool "Support for ISA-bus hardware"
648 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000649 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000650 help
651 Find out whether you have ISA slots on your motherboard. ISA is the
652 name of a bus system, i.e. the way the CPU talks to the other stuff
653 inside your box. If you have an Apple machine, say N here; if you
654 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
655 you have an embedded board, consult your board documentation.
656
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800657config ZONE_DMA
658 bool
659 default y
660
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000661config GENERIC_ISA_DMA
662 bool
663 depends on PPC64 || POWER4 || 6xx && !CPM2
664 default y
665
Paul Mackerras25635c72005-10-26 16:36:55 +1000666config PPC_INDIRECT_PCI
667 bool
668 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600669 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000670 default n
671
Kumar Gala4a89f7f2007-04-12 15:41:26 -0500672config PPC_INDIRECT_PCI_BE
673 bool
674 depends PPC_INDIRECT_PCI
675 default n
676
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000677config EISA
678 bool
679
680config SBUS
681 bool
682
Kumar Gala08264cb2006-01-10 21:43:56 -0600683config FSL_SOC
684 bool
685
Jon Loeliger3e4e97f2007-03-07 14:48:45 -0600686config FSL_PCIE
687 bool
688 depends on PPC_86xx
689
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000690# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
691config MCA
692 bool
693
694config PCI
Jon Loeliger53158622006-08-09 10:37:28 -0500695 bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
Stephen Rothwellbed59272007-03-04 17:04:44 +1100696 || PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
Josh Boyercb9e4d12007-05-08 07:28:38 +1000697 || MPC7448HPC2 || PPC_PS3 || PPC_HOLLY
Jon Loeliger53158622006-08-09 10:37:28 -0500698 default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
699 && !PPC_85xx && !PPC_86xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000700 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
701 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000702 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000703 help
704 Find out whether your system includes a PCI bus. PCI is the name of
705 a bus system, i.e. the way the CPU talks to the other stuff inside
706 your box. If you say Y here, the kernel will include drivers and
707 infrastructure code to support PCI bus devices.
708
709config PCI_DOMAINS
710 bool
711 default PCI
712
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000713config PCI_QSPAN
714 bool "QSpan PCI"
715 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000716 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000717 help
718 Say Y here if you have a system based on a Motorola 8xx-series
719 embedded processor with a QSPAN PCI interface, otherwise say N.
720
721config PCI_8260
722 bool
723 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000724 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000725 default y
726
727config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700728 bool "Enable workaround for MPC826x erratum PCI 9"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000729 depends on PCI_8260 && !ADS8272
730 default y
731
732choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700733 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000734 depends on 8260_PCI9
735
736config 8260_PCI9_IDMA1
737 bool "IDMA1"
738
739config 8260_PCI9_IDMA2
740 bool "IDMA2"
741
742config 8260_PCI9_IDMA3
743 bool "IDMA3"
744
745config 8260_PCI9_IDMA4
746 bool "IDMA4"
747
748endchoice
749
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500750source "drivers/pci/pcie/Kconfig"
751
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000752source "drivers/pci/Kconfig"
753
754source "drivers/pcmcia/Kconfig"
755
756source "drivers/pci/hotplug/Kconfig"
757
758endmenu
759
760menu "Advanced setup"
761 depends on PPC32
762
763config ADVANCED_OPTIONS
764 bool "Prompt for advanced kernel configuration options"
765 help
766 This option will enable prompting for a variety of advanced kernel
767 configuration options. These options can cause the kernel to not
768 work if they are set incorrectly, but can be used to optimize certain
769 aspects of kernel memory management.
770
771 Unless you know what you are doing, say N here.
772
773comment "Default settings for advanced configuration options are used"
774 depends on !ADVANCED_OPTIONS
775
776config HIGHMEM_START_BOOL
777 bool "Set high memory pool address"
778 depends on ADVANCED_OPTIONS && HIGHMEM
779 help
780 This option allows you to set the base address of the kernel virtual
781 area used to map high memory pages. This can be useful in
782 optimizing the layout of kernel virtual memory.
783
784 Say N here unless you know what you are doing.
785
786config HIGHMEM_START
787 hex "Virtual start address of high memory pool" if HIGHMEM_START_BOOL
788 default "0xfe000000"
789
790config LOWMEM_SIZE_BOOL
791 bool "Set maximum low memory"
792 depends on ADVANCED_OPTIONS
793 help
794 This option allows you to set the maximum amount of memory which
795 will be used as "low memory", that is, memory which the kernel can
796 access directly, without having to set up a kernel virtual mapping.
797 This can be useful in optimizing the layout of kernel virtual
798 memory.
799
800 Say N here unless you know what you are doing.
801
802config LOWMEM_SIZE
803 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
804 default "0x30000000"
805
806config KERNEL_START_BOOL
807 bool "Set custom kernel base address"
808 depends on ADVANCED_OPTIONS
809 help
810 This option allows you to set the kernel virtual address at which
811 the kernel will map low memory (the kernel image will be linked at
812 this address). This can be useful in optimizing the virtual memory
813 layout of the system.
814
815 Say N here unless you know what you are doing.
816
817config KERNEL_START
818 hex "Virtual address of kernel base" if KERNEL_START_BOOL
819 default "0xc0000000"
820
821config TASK_SIZE_BOOL
822 bool "Set custom user task size"
823 depends on ADVANCED_OPTIONS
824 help
825 This option allows you to set the amount of virtual address space
826 allocated to user tasks. This can be useful in optimizing the
827 virtual memory layout of the system.
828
829 Say N here unless you know what you are doing.
830
831config TASK_SIZE
832 hex "Size of user task space" if TASK_SIZE_BOOL
833 default "0x80000000"
834
835config CONSISTENT_START_BOOL
836 bool "Set custom consistent memory pool address"
837 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
838 help
839 This option allows you to set the base virtual address
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200840 of the consistent memory pool. This pool of virtual
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000841 memory is used to make consistent memory allocations.
842
843config CONSISTENT_START
844 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
845 default "0xff100000" if NOT_COHERENT_CACHE
846
847config CONSISTENT_SIZE_BOOL
848 bool "Set custom consistent memory pool size"
849 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
850 help
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200851 This option allows you to set the size of the
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000852 consistent memory pool. This pool of virtual memory
853 is used to make consistent memory allocations.
854
855config CONSISTENT_SIZE
856 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
857 default "0x00200000" if NOT_COHERENT_CACHE
858
859config BOOT_LOAD_BOOL
860 bool "Set the boot link/load address"
861 depends on ADVANCED_OPTIONS && !PPC_MULTIPLATFORM
862 help
863 This option allows you to set the initial load address of the zImage
864 or zImage.initrd file. This can be useful if you are on a board
865 which has a small amount of memory.
866
867 Say N here unless you know what you are doing.
868
869config BOOT_LOAD
870 hex "Link/load address for booting" if BOOT_LOAD_BOOL
871 default "0x00400000" if 40x || 8xx || 8260
872 default "0x01000000" if 44x
873 default "0x00800000"
874
875config PIN_TLB
876 bool "Pinned Kernel TLBs (860 ONLY)"
877 depends on ADVANCED_OPTIONS && 8xx
878endmenu
879
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000880if PPC64
881config KERNEL_START
882 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000883 default "0xc000000000000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000884endif
885
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000886source "net/Kconfig"
887
888source "drivers/Kconfig"
889
890source "fs/Kconfig"
891
892# XXX source "arch/ppc/8xx_io/Kconfig"
893
894# XXX source "arch/ppc/8260_io/Kconfig"
895
Li Yang98658532006-10-03 23:10:46 -0500896source "arch/powerpc/sysdev/qe_lib/Kconfig"
897
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000898source "lib/Kconfig"
899
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800900menu "Instrumentation Support"
Kumar Gala98750262007-04-12 18:01:34 -0500901 depends on EXPERIMENTAL
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800902
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000903source "arch/powerpc/oprofile/Kconfig"
904
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800905config KPROBES
906 bool "Kprobes (EXPERIMENTAL)"
Kumar Gala82090032007-02-06 22:55:19 -0600907 depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES
Prasanna S Panchamukhicd6b0762005-11-07 00:59:14 -0800908 help
909 Kprobes allows you to trap at almost any kernel address and
910 execute a callback function. register_kprobe() establishes
911 a probepoint and specifies the callback. Kprobes is useful
912 for kernel debugging, non-intrusive instrumentation and testing.
913 If in doubt, say "N".
914endmenu
915
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000916source "arch/powerpc/Kconfig.debug"
917
918source "security/Kconfig"
919
920config KEYS_COMPAT
921 bool
922 depends on COMPAT && KEYS
923 default y
924
925source "crypto/Kconfig"