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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
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500114 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700115 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100116 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700117 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700118 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500119 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500120 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800121 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000122 select HAVE_ARCH_TRACEHOOK
David S. Millerd9b2b2a2008-02-13 16:56:49 -0800123 select HAVE_LMB
Takashi Iwai7ff86b02008-07-16 02:20:11 +0200124 select HAVE_DMA_ATTRS if PPC64
Jens Axboeb7d7a242008-06-26 11:22:13 +0200125 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400126 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100127 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000128
129config EARLY_PRINTK
130 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100131 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000132
133config COMPAT
134 bool
135 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800136 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000137
138config SYSVIPC_COMPAT
139 bool
140 depends on COMPAT && SYSVIPC
141 default y
142
143# All PPC32s use generic nvram driver through ppc_md
144config GENERIC_NVRAM
145 bool
146 default y if PPC32
147
Ingo Molnarae1e9132008-11-11 09:05:16 +0100148config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000149 bool
150 default y
151
152config ARCH_MAY_HAVE_PC_FDC
153 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100154 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000155
Kumar Gala08264cb2006-01-10 21:43:56 -0600156config PPC_OF
157 def_bool y
158
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000159config OF
160 def_bool y
161
Kumar Gala08264cb2006-01-10 21:43:56 -0600162config PPC_UDBG_16550
163 bool
164 default n
165
Kumar Gala08264cb2006-01-10 21:43:56 -0600166config GENERIC_TBSYNC
167 bool
168 default y if PPC32 && SMP
169 default n
170
Al Viroe65e1fc2006-09-12 03:04:40 -0400171config AUDIT_ARCH
172 bool
173 default y
174
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800175config GENERIC_BUG
176 bool
177 default y
178 depends on BUG
179
Johannes Bergb3028872007-03-20 05:18:02 +1100180config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500181 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100182 bool
183
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600184config DEFAULT_UIMAGE
185 bool
186 help
187 Used to allow a board to specify it wants a uImage built by default
188 default n
189
Scott Woodb09c1642008-01-17 16:31:40 -0600190config REDBOOT
191 bool
192
Johannes Berg801e4062007-12-08 02:12:39 +0100193config HIBERNATE_32
Johannes Berg543b9fd2007-05-03 22:31:38 +1000194 bool
Johannes Berg801e4062007-12-08 02:12:39 +0100195 depends on (PPC_PMAC && !SMP) || BROKEN
196 default y
197
198config HIBERNATE_64
199 bool
200 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
201 default y
202
203config ARCH_HIBERNATION_POSSIBLE
204 bool
205 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
Johannes Berg543b9fd2007-05-03 22:31:38 +1000206 default y
207
Johannes Bergf4cb5702007-12-08 02:14:00 +0100208config ARCH_SUSPEND_POSSIBLE
209 def_bool y
Scott Woodd49747b2007-10-09 12:37:13 -0500210 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100211
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100212config PPC_DCR_NATIVE
213 bool
214 default n
215
216config PPC_DCR_MMIO
217 bool
218 default n
219
220config PPC_DCR
221 bool
222 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
223 default y
224
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100225config PPC_OF_PLATFORM_PCI
226 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100227 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100228 depends on PPC64 # not supported on 32 bits yet
229 default n
230
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000231source "init/Kconfig"
232
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700233source "kernel/Kconfig.freezer"
234
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100235source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500236source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000237
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000238menu "Kernel options"
239
240config HIGHMEM
241 bool "High memory support"
242 depends on PPC32
243
Tony Breeds1ad74992007-09-21 13:26:03 +1000244source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000245source kernel/Kconfig.hz
246source kernel/Kconfig.preempt
247source "fs/Kconfig.binfmt"
248
Mel Gormanba72cb82007-11-28 16:21:13 -0800249config HUGETLB_PAGE_SIZE_VARIABLE
250 bool
251 depends on HUGETLB_PAGE
252 default y
253
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000254config MATH_EMULATION
255 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600256 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000257 ---help---
258 Some PowerPC chips designed for embedded applications do not have
259 a floating-point unit and therefore do not implement the
260 floating-point instructions in the PowerPC instruction set. If you
261 say Y here, the kernel will include code to emulate a floating-point
262 unit, which will allow programs that use floating-point
263 instructions to run.
264
Scott Wood5dd57a12007-09-18 15:29:35 -0500265config 8XX_MINIMAL_FPEMU
266 bool "Minimal math emulation for 8xx"
267 depends on 8xx && !MATH_EMULATION
268 help
269 Older arch/ppc kernels still emulated a few floating point
270 instructions such as load and store, even when full math
271 emulation is disabled. Say "Y" here if you want to preserve
272 this behavior.
273
274 It is recommended that you build a soft-float userspace instead.
275
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000276config IOMMU_VMERGE
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000277 bool "Enable IOMMU virtual merging"
278 depends on PPC64
279 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000280 help
281 Cause IO segments sent to a device for DMA to be merged virtually
282 by the IOMMU when they happen to have been allocated contiguously.
283 This doesn't add pressure to the IOMMU allocator. However, some
284 drivers don't support getting large merged segments coming back
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000285 from *_map_sg().
286
287 Most drivers don't have this problem; it is safe to say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000288
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800289config IOMMU_HELPER
290 def_bool PPC64
291
Becky Bruce15e09c02008-11-20 06:49:16 +0000292config PPC_NEED_DMA_SYNC_OPS
293 def_bool y
294 depends on NOT_COHERENT_CACHE
295
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000296config HOTPLUG_CPU
297 bool "Support for enabling/disabling CPUs"
298 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
299 ---help---
300 Say Y here to be able to disable and re-enable individual
301 CPUs at runtime on SMP machines.
302
303 Say N if you are unsure.
304
Yasunori Gotocc576372006-06-29 02:24:27 -0700305config ARCH_ENABLE_MEMORY_HOTPLUG
306 def_bool y
307
Badari Pulavartya99824f2008-02-05 00:10:18 -0800308config ARCH_HAS_WALK_MEMORY
309 def_bool y
310
Badari Pulavarty14824712008-02-05 00:10:17 -0800311config ARCH_ENABLE_MEMORY_HOTREMOVE
312 def_bool y
313
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000314config KEXEC
315 bool "kexec system call (EXPERIMENTAL)"
Dale Farnsworthfd4ba7e2007-05-12 10:58:43 +1000316 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000317 help
318 kexec is a system call that implements the ability to shutdown your
319 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400320 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000321 you can start any kernel with it, not just Linux.
322
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400323 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000324
325 It is an ongoing process to be certain the hardware in a machine
326 is properly shutdown, so do not be surprised if this code does not
327 initially work for you. It may help to enable device hotplugging
328 support. As of this writing the exact hardware interface is
329 strongly in flux, so no good recommendation can be made.
330
Haren Mynenie8625d462006-01-14 13:48:25 -0800331config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000332 bool "Build a kdump crash kernel"
Mohan Kumar Mc6ac71a2009-01-06 00:23:01 +0000333 depends on PPC64 || 6xx
334 select RELOCATABLE if PPC64
Haren Mynenie8625d462006-01-14 13:48:25 -0800335 help
336 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000337 The same kernel binary can be used as production kernel and dump
338 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800339
Manish Ahuja242f2712008-03-22 10:50:50 +1100340config PHYP_DUMP
341 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
342 depends on PPC_PSERIES && EXPERIMENTAL
343 help
344 Hypervisor-assisted dump is meant to be a kdump replacement
345 offering robustness and speed not possible without system
346 hypervisor assistence.
347
348 If unsure, say "N"
349
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000350config PPCBUG_NVRAM
351 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
352 default y if PPC_PREP
353
354config IRQ_ALL_CPUS
355 bool "Distribute interrupts on all CPUs by default"
356 depends on SMP && !MV64360
357 help
358 This option gives the kernel permission to distribute IRQs across
359 multiple CPUs. Saying N here will route all IRQs to the first
360 CPU. Generally saying Y is safe, although some problems have been
361 reported with SMP Power Macintoshes with this option enabled.
362
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700363config NUMA
364 bool "NUMA support"
365 depends on PPC64
366 default y if SMP && PPC_PSERIES
367
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700368config NODES_SHIFT
369 int
370 default "4"
371 depends on NEED_MULTIPLE_NODES
372
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000373config ARCH_SELECT_MEMORY_MODEL
374 def_bool y
375 depends on PPC64
376
377config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000378 def_bool y
379 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000380
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000381config ARCH_SPARSEMEM_ENABLE
382 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000383 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700384 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100385
386config ARCH_SPARSEMEM_DEFAULT
387 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100388 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000389
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700390config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000391 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700392
393source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000394
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800395config ARCH_MEMORY_PROBE
396 def_bool y
397 depends on MEMORY_HOTPLUG
398
Andy Whitcroft75167952006-10-21 10:24:14 -0700399# Some NUMA nodes have memory ranges that span
400# other nodes. Even though a pfn is valid and
401# between a node's start and end pfns, it may not
402# reside on that node. See memmap_init_zone()
403# for details.
404config NODES_SPAN_OTHER_NODES
405 def_bool y
406 depends on NEED_MULTIPLE_NODES
407
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000408config PPC_HAS_HASH_64K
409 bool
410 depends on PPC64
411 default n
412
Ilya Yanokca9153a2008-12-11 04:55:41 +0300413choice
414 prompt "Page size"
415 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100416 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300417 Select the kernel logical page size. Increasing the page size
418 will reduce software overhead at each page boundary, allow
419 hardware prefetch mechanisms to be more effective, and allow
420 larger dma transfers increasing IO efficiency and reducing
421 overhead. However the utilization of memory will increase.
422 For example, each cached file will using a multiple of the
423 page size to hold its contents and the difference between the
424 end of file and the end of page is wasted.
425
426 Some dedicated systems, such as software raid serving with
427 accelerated calculations, have shown significant increases.
428
429 If you configure a 64 bit kernel for 64k pages but the
430 processor does not support them, then the kernel will simulate
431 them with 4k pages, loading them on demand, but with the
432 reduced software overhead and larger internal fragmentation.
433 For the 32 bit kernel, a large page option will not be offered
434 unless it is supported by the configured processor.
435
436 If unsure, choose 4K_PAGES.
437
438config PPC_4K_PAGES
439 bool "4k page size"
440
441config PPC_16K_PAGES
442 bool "16k page size" if 44x
443
444config PPC_64K_PAGES
445 bool "64k page size" if 44x || PPC_STD_MMU_64
446 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
447
448endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100449
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000450config FORCE_MAX_ZONEORDER
451 int "Maximum zone order"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300452 range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
453 default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
454 range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
455 default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
456 range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
457 default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
458 range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
459 default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000460 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000461 default "11"
462 help
463 The kernel memory allocator divides physically contiguous memory
464 blocks into "zones", where each zone is a power of two number of
465 pages. This option selects the largest power of two that the kernel
466 keeps in the memory allocator. If you need to allocate very large
467 blocks of physically contiguous memory, then you may need to
468 increase this value.
469
470 This config option is actually maximum order plus one. For example,
471 a value of 11 means that the largest free memory block is 2^10 pages.
472
473 The page size is not necessarily 4KB. For example, on 64-bit
474 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
475 this in mind when choosing a value for this option.
476
Paul Mackerrasfa282372008-01-24 08:35:13 +1100477config PPC_SUBPAGE_PROT
478 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300479 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100480 help
481 This option adds support for a system call to allow user programs
482 to set access permissions (read/write, readonly, or no access)
483 on the 4k subpages of each 64k page.
484
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000485config SCHED_SMT
486 bool "SMT (Hyperthreading) scheduler support"
487 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000488 help
489 SMT scheduler support improves the CPU scheduler's decision making
490 when dealing with POWER5 cpus at a cost of slightly increased
491 overhead in some places. If unsure say N here.
492
493config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000494 bool "Support for device tree in /proc"
495 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000496 help
497 This option adds a device-tree directory under /proc which contains
498 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000499 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000501config CMDLINE_BOOL
502 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000503
504config CMDLINE
505 string "Initial kernel command string"
506 depends on CMDLINE_BOOL
507 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
508 help
509 On some platforms, there is currently no way for the boot loader to
510 pass arguments to the kernel. For these platforms, you can supply
511 some command-line options at build time by entering them here. In
512 most cases you will need to specify the root device here.
513
Grant Likelyc356aa42008-07-09 09:41:52 -0600514config EXTRA_TARGETS
515 string "Additional default image types"
516 help
517 List additional targets to be built by the bootwrapper here (separated
518 by spaces). This is useful for targets that depend of device tree
519 files in the .dts directory.
520
521 Targets in this list will be build as part of the default build
522 target, or when the user does a 'make zImage' or a
523 'make zImage.initrd'.
524
525 If unsure, leave blank
526
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000527if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500528config ARCH_WANTS_FREEZER_CONTROL
529 def_bool y
530 depends on ADB_PMU
531
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000532source kernel/power/Kconfig
533endif
534
535config SECCOMP
536 bool "Enable seccomp to safely compute untrusted bytecode"
537 depends on PROC_FS
538 default y
539 help
540 This kernel feature is useful for number crunching applications
541 that may need to compute untrusted bytecode during their
542 execution. By using pipes or other transports made available to
543 the process as file descriptors supporting the read/write
544 syscalls, it's possible to isolate those applications in
545 their own address space using seccomp. Once seccomp is
546 enabled via /proc/<pid>/seccomp, it cannot be disabled
547 and the task is only allowed to execute a few safe syscalls
548 defined by each seccomp mode.
549
550 If unsure, say Y. Only embedded should say N here.
551
552endmenu
553
554config ISA_DMA_API
555 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100556 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000557
558menu "Bus options"
559
560config ISA
561 bool "Support for ISA-bus hardware"
562 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000563 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000564 help
565 Find out whether you have ISA slots on your motherboard. ISA is the
566 name of a bus system, i.e. the way the CPU talks to the other stuff
567 inside your box. If you have an Apple machine, say N here; if you
568 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
569 you have an embedded board, consult your board documentation.
570
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800571config ZONE_DMA
572 bool
573 default y
574
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000575config GENERIC_ISA_DMA
576 bool
577 depends on PPC64 || POWER4 || 6xx && !CPM2
578 default y
579
Paul Mackerras25635c72005-10-26 16:36:55 +1000580config PPC_INDIRECT_PCI
581 bool
582 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600583 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000584 default n
585
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000586config EISA
587 bool
588
589config SBUS
590 bool
591
Kumar Gala08264cb2006-01-10 21:43:56 -0600592config FSL_SOC
593 bool
594
Roy Zang55c44992007-07-10 18:44:34 +0800595config FSL_PCI
596 bool
597 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600598 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800599
Stefan Roese2a706912008-03-26 22:39:50 +1100600config 4xx_SOC
601 bool
602
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400603config FSL_LBC
604 bool
605 help
606 Freescale Localbus support
607
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400608config FSL_GTM
609 bool
610 depends on PPC_83xx || QUICC_ENGINE || CPM2
611 help
612 Freescale General-purpose Timers support
613
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000614# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
615config MCA
616 bool
617
John Rigbyb5005632008-06-26 11:07:56 -0600618# Platforms that what PCI turned unconditionally just do select PCI
619# in their config node. Platforms that want to choose at config
620# time should select PPC_PCI_CHOICE
621config PPC_PCI_CHOICE
622 bool
623
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000624config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600625 bool "PCI support" if PPC_PCI_CHOICE
626 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Jon Loeliger53158622006-08-09 10:37:28 -0500627 && !PPC_85xx && !PPC_86xx
David Gibsonf21f49e2007-06-13 14:52:54 +1000628 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000629 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000630 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000631 help
632 Find out whether your system includes a PCI bus. PCI is the name of
633 a bus system, i.e. the way the CPU talks to the other stuff inside
634 your box. If you say Y here, the kernel will include drivers and
635 infrastructure code to support PCI bus devices.
636
637config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600638 def_bool PCI
639
640config PCI_SYSCALL
641 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000642
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000643config PCI_QSPAN
644 bool "QSpan PCI"
645 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000646 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000647 help
648 Say Y here if you have a system based on a Motorola 8xx-series
649 embedded processor with a QSPAN PCI interface, otherwise say N.
650
651config PCI_8260
652 bool
653 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000654 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000655 default y
656
657config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700658 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500659 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000660 default y
661
662choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700663 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000664 depends on 8260_PCI9
665
666config 8260_PCI9_IDMA1
667 bool "IDMA1"
668
669config 8260_PCI9_IDMA2
670 bool "IDMA2"
671
672config 8260_PCI9_IDMA3
673 bool "IDMA3"
674
675config 8260_PCI9_IDMA4
676 bool "IDMA4"
677
678endchoice
679
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500680source "drivers/pci/pcie/Kconfig"
681
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000682source "drivers/pci/Kconfig"
683
684source "drivers/pcmcia/Kconfig"
685
686source "drivers/pci/hotplug/Kconfig"
687
Zhang Weif1f389d2008-04-18 13:33:39 -0700688config HAS_RAPIDIO
689 bool
690 default n
691
692config RAPIDIO
693 bool "RapidIO support"
694 depends on HAS_RAPIDIO
695 help
696 If you say Y here, the kernel will include drivers and
697 infrastructure code to support RapidIO interconnect devices.
698
699source "drivers/rapidio/Kconfig"
700
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000701endmenu
702
703menu "Advanced setup"
704 depends on PPC32
705
706config ADVANCED_OPTIONS
707 bool "Prompt for advanced kernel configuration options"
708 help
709 This option will enable prompting for a variety of advanced kernel
710 configuration options. These options can cause the kernel to not
711 work if they are set incorrectly, but can be used to optimize certain
712 aspects of kernel memory management.
713
714 Unless you know what you are doing, say N here.
715
716comment "Default settings for advanced configuration options are used"
717 depends on !ADVANCED_OPTIONS
718
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000719config LOWMEM_SIZE_BOOL
720 bool "Set maximum low memory"
721 depends on ADVANCED_OPTIONS
722 help
723 This option allows you to set the maximum amount of memory which
724 will be used as "low memory", that is, memory which the kernel can
725 access directly, without having to set up a kernel virtual mapping.
726 This can be useful in optimizing the layout of kernel virtual
727 memory.
728
729 Say N here unless you know what you are doing.
730
731config LOWMEM_SIZE
732 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
733 default "0x30000000"
734
Trent Piepho96051462008-12-08 19:34:58 -0800735config LOWMEM_CAM_NUM_BOOL
736 bool "Set number of CAMs to use to map low memory"
737 depends on ADVANCED_OPTIONS && FSL_BOOKE
738 help
739 This option allows you to set the maximum number of CAM slots that
740 will be used to map low memory. There are a limited number of slots
741 available and even more limited number that will fit in the L1 MMU.
742 However, using more entries will allow mapping more low memory. This
743 can be useful in optimizing the layout of kernel virtual memory.
744
745 Say N here unless you know what you are doing.
746
747config LOWMEM_CAM_NUM
748 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
749 default 3
750
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000751config RELOCATABLE
752 bool "Build a relocatable kernel (EXPERIMENTAL)"
753 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
754 help
755 This builds a kernel image that is capable of running at the
756 location the kernel is loaded at (some alignment restrictions may
757 exist).
758
759 One use is for the kexec on panic case where the recovery kernel
760 must live at a different physical address than the primary
761 kernel.
762
763 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
764 it has been loaded at and the compile time physical addresses
765 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
766 setting can still be useful to bootwrappers that need to know the
767 load location of the kernel (eg. u-boot/mkimage).
768
769config PAGE_OFFSET_BOOL
770 bool "Set custom page offset address"
771 depends on ADVANCED_OPTIONS
772 help
773 This option allows you to set the kernel virtual address at which
774 the kernel will map low memory. This can be useful in optimizing
775 the virtual memory layout of the system.
776
777 Say N here unless you know what you are doing.
778
779config PAGE_OFFSET
780 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
781 default "0xc0000000"
782
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000783config KERNEL_START_BOOL
784 bool "Set custom kernel base address"
785 depends on ADVANCED_OPTIONS
786 help
787 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000788 the kernel will be loaded. Normally this should match PAGE_OFFSET
789 however there are times (like kdump) that one might not want them
790 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000791
792 Say N here unless you know what you are doing.
793
794config KERNEL_START
795 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000796 default PAGE_OFFSET if PAGE_OFFSET_BOOL
797 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000798 default "0xc0000000"
799
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000800config PHYSICAL_START_BOOL
801 bool "Set physical address where the kernel is loaded"
802 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
803 help
804 This gives the physical address where the kernel is loaded.
805
806 Say N here unless you know what you are doing.
807
808config PHYSICAL_START
809 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
810 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
811 default "0x00000000"
812
813config PHYSICAL_ALIGN
814 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800815 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000816 help
817 This value puts the alignment restrictions on physical address
818 where kernel is loaded and run from. Kernel is compiled for an
819 address which meets above alignment restriction.
820
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000821config 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
Kumar Gala4d9e55102007-10-11 13:40:21 -0500833 default "0x80000000" if PPC_PREP || PPC_8xx
834 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000835
836config CONSISTENT_START_BOOL
837 bool "Set custom consistent memory pool address"
838 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
839 help
840 This option allows you to set the base virtual address
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200841 of the consistent memory pool. This pool of virtual
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000842 memory is used to make consistent memory allocations.
843
844config CONSISTENT_START
845 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
Scott Woodccf0d682007-07-16 11:28:18 -0500846 default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000847 default "0xff100000" if NOT_COHERENT_CACHE
848
849config CONSISTENT_SIZE_BOOL
850 bool "Set custom consistent memory pool size"
851 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
852 help
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200853 This option allows you to set the size of the
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000854 consistent memory pool. This pool of virtual memory
855 is used to make consistent memory allocations.
856
857config CONSISTENT_SIZE
858 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
859 default "0x00200000" if NOT_COHERENT_CACHE
860
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000861config PIN_TLB
862 bool "Pinned Kernel TLBs (860 ONLY)"
863 depends on ADVANCED_OPTIONS && 8xx
864endmenu
865
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000866if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000867config RELOCATABLE
868 bool "Build a relocatable kernel"
869 help
870 This builds a kernel image that is capable of running anywhere
871 in the RMA (real memory area) at any 16k-aligned base address.
872 The kernel is linked as a position-independent executable (PIE)
873 and contains dynamic relocations which are processed early
874 in the bootup process.
875
876 One use is for the kexec on panic case where the recovery kernel
877 must live at a different physical address than the primary
878 kernel.
879
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000880config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000881 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000882 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000883config KERNEL_START
884 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000885 default "0xc000000000000000"
886config PHYSICAL_START
887 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000888 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000889endif
890
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000891source "net/Kconfig"
892
893source "drivers/Kconfig"
894
895source "fs/Kconfig"
896
Li Yang98658532006-10-03 23:10:46 -0500897source "arch/powerpc/sysdev/qe_lib/Kconfig"
898
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000899source "lib/Kconfig"
900
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000901source "arch/powerpc/Kconfig.debug"
902
903source "security/Kconfig"
904
905config KEYS_COMPAT
906 bool
907 depends on COMPAT && KEYS
908 default y
909
910source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000911
912config PPC_CLOCK
913 bool
914 default n
David Brownell9483a572008-07-23 21:26:48 -0700915 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000916
917config PPC_LIB_RHEAP
918 bool
919
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500920source "arch/powerpc/kvm/Kconfig"