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Paul Mackerras14cf11a2005-09-26 16:04:21 +10001# For a description of the syntax of this configuration file,
2# see Documentation/kbuild/kconfig-language.txt.
3#
4
5mainmenu "Linux/PowerPC Kernel Configuration"
6
Arnd Bergmanna0ae9c72007-06-13 02:30:17 +10007source "arch/powerpc/platforms/Kconfig.cputype"
Johannes Berg17e638b2007-03-19 11:53:53 +01008
Paul Mackerras14cf11a2005-09-26 16:04:21 +10009config PPC32
10 bool
11 default y if !PPC64
12
13config 64BIT
14 bool
15 default y if PPC64
16
Stephen Rothwell2578bfa2007-09-21 10:16:20 +100017config WORD_SIZE
18 int
19 default 64 if PPC64
20 default 32 if !PPC64
21
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -070022config ARCH_PHYS_ADDR_T_64BIT
23 def_bool PPC64 || PHYS_64BIT
24
Paul Mackerras14cf11a2005-09-26 16:04:21 +100025config MMU
26 bool
27 default y
28
Tony Breedsaa3be5f2007-09-21 13:26:02 +100029config GENERIC_CMOS_UPDATE
30 def_bool y
31
Tony Breeds4a4cfe32007-09-22 07:35:52 +100032config GENERIC_TIME
33 def_bool y
34
35config GENERIC_TIME_VSYSCALL
36 def_bool y
37
Tony Breedsd831d0b2007-09-21 13:26:03 +100038config GENERIC_CLOCKEVENTS
39 def_bool y
40
Paul Mackerras14cf11a2005-09-26 16:04:21 +100041config GENERIC_HARDIRQS
42 bool
43 default y
44
Michael Ellerman8e27f4d2009-04-22 15:31:45 +000045config GENERIC_HARDIRQS_NO__DO_IRQ
46 bool
47 default y
48
Tejun Heoc2a7e812009-08-14 15:00:53 +090049config HAVE_SETUP_PER_CPU_AREA
Tejun Heoe74e3962009-03-30 19:07:44 +090050 def_bool PPC64
51
Tejun Heoc2a7e812009-08-14 15:00:53 +090052config NEED_PER_CPU_EMBED_FIRST_CHUNK
travis@sgi.comb32ef632008-01-30 13:32:51 +010053 def_bool PPC64
54
Ingo Molnar0d7012a2006-06-29 02:24:43 -070055config IRQ_PER_CPU
56 bool
57 default y
58
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100059config STACKTRACE_SUPPORT
60 bool
61 default y
62
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100063config HAVE_LATENCYTOP_SUPPORT
64 def_bool y
65
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100066config TRACE_IRQFLAGS_SUPPORT
67 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100068 default y
69
70config LOCKDEP_SUPPORT
71 bool
72 default y
73
Paul Mackerras14cf11a2005-09-26 16:04:21 +100074config RWSEM_GENERIC_SPINLOCK
75 bool
76
77config RWSEM_XCHGADD_ALGORITHM
78 bool
79 default y
80
Nick Piggin95c354f2008-01-30 13:31:20 +010081config GENERIC_LOCKBREAK
82 bool
83 default y
84 depends on SMP && PREEMPT
85
David Howellsf0d1b0b2006-12-08 02:37:49 -080086config ARCH_HAS_ILOG2_U32
87 bool
David Howellsef55d532006-12-08 02:37:53 -080088 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080089
90config ARCH_HAS_ILOG2_U64
91 bool
David Howellsef55d532006-12-08 02:37:53 -080092 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080093
Akinobu Mitae779b2f2006-03-26 01:39:33 -080094config GENERIC_HWEIGHT
95 bool
96 default y
97
Jon Mason0a9cb462006-05-19 15:35:32 -050098config GENERIC_FIND_NEXT_BIT
99 bool
100 default y
101
Anton Vorontsovb7ce3412008-04-11 23:06:36 +1000102config GENERIC_GPIO
103 bool
104 help
105 Generic GPIO API support
106
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700107config ARCH_NO_VIRT_TO_BUS
108 def_bool PPC64
109
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000110config PPC
111 bool
112 default y
Steven Rostedt2b79d692009-01-06 18:49:17 +0000113 select HAVE_FTRACE_MCOUNT_RECORD
114 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400115 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500116 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700117 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100118 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700119 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700120 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500121 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500122 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800123 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000124 select HAVE_ARCH_TRACEHOOK
David S. Millerd9b2b2a2008-02-13 16:56:49 -0800125 select HAVE_LMB
FUJITA Tomonori46bab4e2009-08-04 19:08:26 +0000126 select HAVE_DMA_ATTRS
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000127 select HAVE_DMA_API_DEBUG
Jens Axboeb7d7a242008-06-26 11:22:13 +0200128 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400129 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100130 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000131 select GENERIC_ATOMIC64 if PPC32
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200132 select HAVE_PERF_EVENTS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000133
134config EARLY_PRINTK
135 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100136 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000137
138config COMPAT
139 bool
140 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800141 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000142
143config SYSVIPC_COMPAT
144 bool
145 depends on COMPAT && SYSVIPC
146 default y
147
148# All PPC32s use generic nvram driver through ppc_md
149config GENERIC_NVRAM
150 bool
151 default y if PPC32
152
Ingo Molnarae1e9132008-11-11 09:05:16 +0100153config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000154 bool
155 default y
156
157config ARCH_MAY_HAVE_PC_FDC
158 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100159 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000160
Kumar Gala08264cb2006-01-10 21:43:56 -0600161config PPC_OF
162 def_bool y
163
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000164config OF
165 def_bool y
166
Kumar Gala08264cb2006-01-10 21:43:56 -0600167config PPC_UDBG_16550
168 bool
169 default n
170
Kumar Gala08264cb2006-01-10 21:43:56 -0600171config GENERIC_TBSYNC
172 bool
173 default y if PPC32 && SMP
174 default n
175
Al Viroe65e1fc2006-09-12 03:04:40 -0400176config AUDIT_ARCH
177 bool
178 default y
179
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800180config GENERIC_BUG
181 bool
182 default y
183 depends on BUG
184
Johannes Bergb3028872007-03-20 05:18:02 +1100185config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500186 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100187 bool
188
David Gibson9fffb552009-04-30 15:25:53 +1000189config DTC
190 bool
191 default y
192
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600193config DEFAULT_UIMAGE
194 bool
195 help
196 Used to allow a board to specify it wants a uImage built by default
197 default n
198
Scott Woodb09c1642008-01-17 16:31:40 -0600199config REDBOOT
200 bool
201
Johannes Berg801e4062007-12-08 02:12:39 +0100202config HIBERNATE_32
Johannes Berg543b9fd2007-05-03 22:31:38 +1000203 bool
Johannes Berg801e4062007-12-08 02:12:39 +0100204 depends on (PPC_PMAC && !SMP) || BROKEN
205 default y
206
207config HIBERNATE_64
208 bool
209 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
210 default y
211
212config ARCH_HIBERNATION_POSSIBLE
213 bool
214 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
Johannes Berg543b9fd2007-05-03 22:31:38 +1000215 default y
216
Johannes Bergf4cb5702007-12-08 02:14:00 +0100217config ARCH_SUSPEND_POSSIBLE
218 def_bool y
Scott Woodd49747b2007-10-09 12:37:13 -0500219 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100220
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100221config PPC_DCR_NATIVE
222 bool
223 default n
224
225config PPC_DCR_MMIO
226 bool
227 default n
228
229config PPC_DCR
230 bool
231 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
232 default y
233
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100234config PPC_OF_PLATFORM_PCI
235 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100236 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100237 depends on PPC64 # not supported on 32 bits yet
238 default n
239
Akinobu Mita6a11f752009-03-31 15:23:17 -0700240config ARCH_SUPPORTS_DEBUG_PAGEALLOC
241 def_bool y
242
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000243source "init/Kconfig"
244
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700245source "kernel/Kconfig.freezer"
246
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100247source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500248source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000249
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000250menu "Kernel options"
251
252config HIGHMEM
253 bool "High memory support"
254 depends on PPC32
255
Tony Breeds1ad74992007-09-21 13:26:03 +1000256source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000257source kernel/Kconfig.hz
258source kernel/Kconfig.preempt
259source "fs/Kconfig.binfmt"
260
Mel Gormanba72cb82007-11-28 16:21:13 -0800261config HUGETLB_PAGE_SIZE_VARIABLE
262 bool
263 depends on HUGETLB_PAGE
264 default y
265
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000266config MATH_EMULATION
267 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600268 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000269 ---help---
270 Some PowerPC chips designed for embedded applications do not have
271 a floating-point unit and therefore do not implement the
272 floating-point instructions in the PowerPC instruction set. If you
273 say Y here, the kernel will include code to emulate a floating-point
274 unit, which will allow programs that use floating-point
275 instructions to run.
276
Scott Wood5dd57a12007-09-18 15:29:35 -0500277config 8XX_MINIMAL_FPEMU
278 bool "Minimal math emulation for 8xx"
279 depends on 8xx && !MATH_EMULATION
280 help
281 Older arch/ppc kernels still emulated a few floating point
282 instructions such as load and store, even when full math
283 emulation is disabled. Say "Y" here if you want to preserve
284 this behavior.
285
286 It is recommended that you build a soft-float userspace instead.
287
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000288config IOMMU_VMERGE
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000289 bool "Enable IOMMU virtual merging"
290 depends on PPC64
291 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000292 help
293 Cause IO segments sent to a device for DMA to be merged virtually
294 by the IOMMU when they happen to have been allocated contiguously.
295 This doesn't add pressure to the IOMMU allocator. However, some
296 drivers don't support getting large merged segments coming back
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000297 from *_map_sg().
298
299 Most drivers don't have this problem; it is safe to say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000300
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800301config IOMMU_HELPER
302 def_bool PPC64
303
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000304config SWIOTLB
305 bool "SWIOTLB support"
306 default n
307 select IOMMU_HELPER
308 ---help---
309 Support for IO bounce buffering for systems without an IOMMU.
310 This allows us to DMA to the full physical address space on
311 platforms where the size of a physical address is larger
312 than the bus address. Not all platforms support this.
313
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000314config HOTPLUG_CPU
315 bool "Support for enabling/disabling CPUs"
316 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
317 ---help---
318 Say Y here to be able to disable and re-enable individual
319 CPUs at runtime on SMP machines.
320
321 Say N if you are unsure.
322
Yasunori Gotocc576372006-06-29 02:24:27 -0700323config ARCH_ENABLE_MEMORY_HOTPLUG
324 def_bool y
325
Badari Pulavartya99824f2008-02-05 00:10:18 -0800326config ARCH_HAS_WALK_MEMORY
327 def_bool y
328
Badari Pulavarty14824712008-02-05 00:10:17 -0800329config ARCH_ENABLE_MEMORY_HOTREMOVE
330 def_bool y
331
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000332config KEXEC
333 bool "kexec system call (EXPERIMENTAL)"
Geert Uytterhoevencb93d562009-04-02 06:25:41 +0000334 depends on PPC_BOOK3S && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000335 help
336 kexec is a system call that implements the ability to shutdown your
337 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400338 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000339 you can start any kernel with it, not just Linux.
340
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400341 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000342
343 It is an ongoing process to be certain the hardware in a machine
344 is properly shutdown, so do not be surprised if this code does not
345 initially work for you. It may help to enable device hotplugging
346 support. As of this writing the exact hardware interface is
347 strongly in flux, so no good recommendation can be made.
348
Haren Mynenie8625d462006-01-14 13:48:25 -0800349config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000350 bool "Build a kdump crash kernel"
Mohan Kumar Mc6ac71a2009-01-06 00:23:01 +0000351 depends on PPC64 || 6xx
352 select RELOCATABLE if PPC64
Haren Mynenie8625d462006-01-14 13:48:25 -0800353 help
354 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000355 The same kernel binary can be used as production kernel and dump
356 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800357
Manish Ahuja242f2712008-03-22 10:50:50 +1100358config PHYP_DUMP
359 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
360 depends on PPC_PSERIES && EXPERIMENTAL
361 help
362 Hypervisor-assisted dump is meant to be a kdump replacement
363 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100364 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100365
366 If unsure, say "N"
367
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000368config PPCBUG_NVRAM
369 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
370 default y if PPC_PREP
371
372config IRQ_ALL_CPUS
373 bool "Distribute interrupts on all CPUs by default"
374 depends on SMP && !MV64360
375 help
376 This option gives the kernel permission to distribute IRQs across
377 multiple CPUs. Saying N here will route all IRQs to the first
378 CPU. Generally saying Y is safe, although some problems have been
379 reported with SMP Power Macintoshes with this option enabled.
380
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700381config NUMA
382 bool "NUMA support"
383 depends on PPC64
384 default y if SMP && PPC_PSERIES
385
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700386config NODES_SHIFT
387 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000388 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700389 default "4"
390 depends on NEED_MULTIPLE_NODES
391
Anton Blanchardea55bf22009-09-21 19:56:43 +0000392config MAX_ACTIVE_REGIONS
393 int
394 default "256" if PPC64
395 default "32"
396
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000397config ARCH_SELECT_MEMORY_MODEL
398 def_bool y
399 depends on PPC64
400
401config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000402 def_bool y
403 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000404
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000405config ARCH_SPARSEMEM_ENABLE
406 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000407 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700408 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100409
410config ARCH_SPARSEMEM_DEFAULT
411 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100412 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000413
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700414config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000415 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700416
417source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000418
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800419config ARCH_MEMORY_PROBE
420 def_bool y
421 depends on MEMORY_HOTPLUG
422
Andy Whitcroft75167952006-10-21 10:24:14 -0700423# Some NUMA nodes have memory ranges that span
424# other nodes. Even though a pfn is valid and
425# between a node's start and end pfns, it may not
426# reside on that node. See memmap_init_zone()
427# for details.
428config NODES_SPAN_OTHER_NODES
429 def_bool y
430 depends on NEED_MULTIPLE_NODES
431
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000432config PPC_HAS_HASH_64K
433 bool
434 depends on PPC64
435 default n
436
Yuri Tikhonove1240122009-01-29 01:40:44 +0000437config STDBINUTILS
438 bool "Using standard binutils settings"
439 depends on 44x
440 default y
441 help
442 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
443 Note, that kernel will be able to run only those applications,
444 which had been compiled using binutils later than 2.17.50.0.3 with
445 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
446 the older binutils, you can patch them with a trivial patch, which
447 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
448
Ilya Yanokca9153a2008-12-11 04:55:41 +0300449choice
450 prompt "Page size"
451 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100452 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300453 Select the kernel logical page size. Increasing the page size
454 will reduce software overhead at each page boundary, allow
455 hardware prefetch mechanisms to be more effective, and allow
456 larger dma transfers increasing IO efficiency and reducing
457 overhead. However the utilization of memory will increase.
458 For example, each cached file will using a multiple of the
459 page size to hold its contents and the difference between the
460 end of file and the end of page is wasted.
461
462 Some dedicated systems, such as software raid serving with
463 accelerated calculations, have shown significant increases.
464
465 If you configure a 64 bit kernel for 64k pages but the
466 processor does not support them, then the kernel will simulate
467 them with 4k pages, loading them on demand, but with the
468 reduced software overhead and larger internal fragmentation.
469 For the 32 bit kernel, a large page option will not be offered
470 unless it is supported by the configured processor.
471
472 If unsure, choose 4K_PAGES.
473
474config PPC_4K_PAGES
475 bool "4k page size"
476
477config PPC_16K_PAGES
478 bool "16k page size" if 44x
479
480config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000481 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300482 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
483
Yuri Tikhonove1240122009-01-29 01:40:44 +0000484config PPC_256K_PAGES
485 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000486 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000487 help
488 Make the page size 256k.
489
490 As the ELF standard only requires alignment to support page
491 sizes up to 64k, you will need to compile all of your user
492 space applications with a non-standard binutils settings
493 (see the STDBINUTILS description for details).
494
495 Say N unless you know what you are doing.
496
Ilya Yanokca9153a2008-12-11 04:55:41 +0300497endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100498
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000499config FORCE_MAX_ZONEORDER
500 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000501 range 9 64 if PPC64 && PPC_64K_PAGES
502 default "9" if PPC64 && PPC_64K_PAGES
503 range 13 64 if PPC64 && !PPC_64K_PAGES
504 default "13" if PPC64 && !PPC_64K_PAGES
505 range 9 64 if PPC32 && PPC_16K_PAGES
506 default "9" if PPC32 && PPC_16K_PAGES
507 range 7 64 if PPC32 && PPC_64K_PAGES
508 default "7" if PPC32 && PPC_64K_PAGES
509 range 5 64 if PPC32 && PPC_256K_PAGES
510 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000511 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000512 default "11"
513 help
514 The kernel memory allocator divides physically contiguous memory
515 blocks into "zones", where each zone is a power of two number of
516 pages. This option selects the largest power of two that the kernel
517 keeps in the memory allocator. If you need to allocate very large
518 blocks of physically contiguous memory, then you may need to
519 increase this value.
520
521 This config option is actually maximum order plus one. For example,
522 a value of 11 means that the largest free memory block is 2^10 pages.
523
524 The page size is not necessarily 4KB. For example, on 64-bit
525 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
526 this in mind when choosing a value for this option.
527
Paul Mackerrasfa282372008-01-24 08:35:13 +1100528config PPC_SUBPAGE_PROT
529 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300530 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100531 help
532 This option adds support for a system call to allow user programs
533 to set access permissions (read/write, readonly, or no access)
534 on the 4k subpages of each 64k page.
535
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000536config SCHED_SMT
537 bool "SMT (Hyperthreading) scheduler support"
538 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000539 help
540 SMT scheduler support improves the CPU scheduler's decision making
541 when dealing with POWER5 cpus at a cost of slightly increased
542 overhead in some places. If unsure say N here.
543
544config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000545 bool "Support for device tree in /proc"
546 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000547 help
548 This option adds a device-tree directory under /proc which contains
549 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000550 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000551
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000552config CMDLINE_BOOL
553 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000554
555config CMDLINE
556 string "Initial kernel command string"
557 depends on CMDLINE_BOOL
558 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
559 help
560 On some platforms, there is currently no way for the boot loader to
561 pass arguments to the kernel. For these platforms, you can supply
562 some command-line options at build time by entering them here. In
563 most cases you will need to specify the root device here.
564
Grant Likelyc356aa42008-07-09 09:41:52 -0600565config EXTRA_TARGETS
566 string "Additional default image types"
567 help
568 List additional targets to be built by the bootwrapper here (separated
569 by spaces). This is useful for targets that depend of device tree
570 files in the .dts directory.
571
572 Targets in this list will be build as part of the default build
573 target, or when the user does a 'make zImage' or a
574 'make zImage.initrd'.
575
576 If unsure, leave blank
577
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000578if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500579config ARCH_WANTS_FREEZER_CONTROL
580 def_bool y
581 depends on ADB_PMU
582
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000583source kernel/power/Kconfig
584endif
585
586config SECCOMP
587 bool "Enable seccomp to safely compute untrusted bytecode"
588 depends on PROC_FS
589 default y
590 help
591 This kernel feature is useful for number crunching applications
592 that may need to compute untrusted bytecode during their
593 execution. By using pipes or other transports made available to
594 the process as file descriptors supporting the read/write
595 syscalls, it's possible to isolate those applications in
596 their own address space using seccomp. Once seccomp is
597 enabled via /proc/<pid>/seccomp, it cannot be disabled
598 and the task is only allowed to execute a few safe syscalls
599 defined by each seccomp mode.
600
601 If unsure, say Y. Only embedded should say N here.
602
603endmenu
604
605config ISA_DMA_API
606 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100607 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000608
609menu "Bus options"
610
611config ISA
612 bool "Support for ISA-bus hardware"
613 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000614 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000615 help
616 Find out whether you have ISA slots on your motherboard. ISA is the
617 name of a bus system, i.e. the way the CPU talks to the other stuff
618 inside your box. If you have an Apple machine, say N here; if you
619 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
620 you have an embedded board, consult your board documentation.
621
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800622config ZONE_DMA
623 bool
624 default y
625
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000626config GENERIC_ISA_DMA
627 bool
628 depends on PPC64 || POWER4 || 6xx && !CPM2
629 default y
630
Paul Mackerras25635c72005-10-26 16:36:55 +1000631config PPC_INDIRECT_PCI
632 bool
633 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600634 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000635 default n
636
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000637config EISA
638 bool
639
640config SBUS
641 bool
642
Kumar Gala08264cb2006-01-10 21:43:56 -0600643config FSL_SOC
644 bool
645
Roy Zang55c44992007-07-10 18:44:34 +0800646config FSL_PCI
647 bool
648 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600649 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800650
Stefan Roese2a706912008-03-26 22:39:50 +1100651config 4xx_SOC
652 bool
653
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400654config FSL_LBC
655 bool
656 help
657 Freescale Localbus support
658
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400659config FSL_GTM
660 bool
661 depends on PPC_83xx || QUICC_ENGINE || CPM2
662 help
663 Freescale General-purpose Timers support
664
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000665# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
666config MCA
667 bool
668
John Rigbyb5005632008-06-26 11:07:56 -0600669# Platforms that what PCI turned unconditionally just do select PCI
670# in their config node. Platforms that want to choose at config
671# time should select PPC_PCI_CHOICE
672config PPC_PCI_CHOICE
673 bool
674
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000675config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600676 bool "PCI support" if PPC_PCI_CHOICE
677 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Jon Loeliger53158622006-08-09 10:37:28 -0500678 && !PPC_85xx && !PPC_86xx
David Gibsonf21f49e2007-06-13 14:52:54 +1000679 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000680 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000681 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000682 help
683 Find out whether your system includes a PCI bus. PCI is the name of
684 a bus system, i.e. the way the CPU talks to the other stuff inside
685 your box. If you say Y here, the kernel will include drivers and
686 infrastructure code to support PCI bus devices.
687
688config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600689 def_bool PCI
690
691config PCI_SYSCALL
692 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000693
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000694config PCI_QSPAN
695 bool "QSpan PCI"
696 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000697 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000698 help
699 Say Y here if you have a system based on a Motorola 8xx-series
700 embedded processor with a QSPAN PCI interface, otherwise say N.
701
702config PCI_8260
703 bool
704 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000705 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000706 default y
707
708config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700709 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500710 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000711 default y
712
713choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700714 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000715 depends on 8260_PCI9
716
717config 8260_PCI9_IDMA1
718 bool "IDMA1"
719
720config 8260_PCI9_IDMA2
721 bool "IDMA2"
722
723config 8260_PCI9_IDMA3
724 bool "IDMA3"
725
726config 8260_PCI9_IDMA4
727 bool "IDMA4"
728
729endchoice
730
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500731source "drivers/pci/pcie/Kconfig"
732
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000733source "drivers/pci/Kconfig"
734
735source "drivers/pcmcia/Kconfig"
736
737source "drivers/pci/hotplug/Kconfig"
738
Zhang Weif1f389d2008-04-18 13:33:39 -0700739config HAS_RAPIDIO
740 bool
741 default n
742
743config RAPIDIO
744 bool "RapidIO support"
745 depends on HAS_RAPIDIO
746 help
747 If you say Y here, the kernel will include drivers and
748 infrastructure code to support RapidIO interconnect devices.
749
750source "drivers/rapidio/Kconfig"
751
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000752endmenu
753
754menu "Advanced setup"
755 depends on PPC32
756
757config ADVANCED_OPTIONS
758 bool "Prompt for advanced kernel configuration options"
759 help
760 This option will enable prompting for a variety of advanced kernel
761 configuration options. These options can cause the kernel to not
762 work if they are set incorrectly, but can be used to optimize certain
763 aspects of kernel memory management.
764
765 Unless you know what you are doing, say N here.
766
767comment "Default settings for advanced configuration options are used"
768 depends on !ADVANCED_OPTIONS
769
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000770config LOWMEM_SIZE_BOOL
771 bool "Set maximum low memory"
772 depends on ADVANCED_OPTIONS
773 help
774 This option allows you to set the maximum amount of memory which
775 will be used as "low memory", that is, memory which the kernel can
776 access directly, without having to set up a kernel virtual mapping.
777 This can be useful in optimizing the layout of kernel virtual
778 memory.
779
780 Say N here unless you know what you are doing.
781
782config LOWMEM_SIZE
783 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
784 default "0x30000000"
785
Trent Piepho96051462008-12-08 19:34:58 -0800786config LOWMEM_CAM_NUM_BOOL
787 bool "Set number of CAMs to use to map low memory"
788 depends on ADVANCED_OPTIONS && FSL_BOOKE
789 help
790 This option allows you to set the maximum number of CAM slots that
791 will be used to map low memory. There are a limited number of slots
792 available and even more limited number that will fit in the L1 MMU.
793 However, using more entries will allow mapping more low memory. This
794 can be useful in optimizing the layout of kernel virtual memory.
795
796 Say N here unless you know what you are doing.
797
798config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400799 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800800 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
801 default 3
802
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000803config RELOCATABLE
804 bool "Build a relocatable kernel (EXPERIMENTAL)"
805 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
806 help
807 This builds a kernel image that is capable of running at the
808 location the kernel is loaded at (some alignment restrictions may
809 exist).
810
811 One use is for the kexec on panic case where the recovery kernel
812 must live at a different physical address than the primary
813 kernel.
814
815 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
816 it has been loaded at and the compile time physical addresses
817 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
818 setting can still be useful to bootwrappers that need to know the
819 load location of the kernel (eg. u-boot/mkimage).
820
821config PAGE_OFFSET_BOOL
822 bool "Set custom page offset address"
823 depends on ADVANCED_OPTIONS
824 help
825 This option allows you to set the kernel virtual address at which
826 the kernel will map low memory. This can be useful in optimizing
827 the virtual memory layout of the system.
828
829 Say N here unless you know what you are doing.
830
831config PAGE_OFFSET
832 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
833 default "0xc0000000"
834
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000835config KERNEL_START_BOOL
836 bool "Set custom kernel base address"
837 depends on ADVANCED_OPTIONS
838 help
839 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000840 the kernel will be loaded. Normally this should match PAGE_OFFSET
841 however there are times (like kdump) that one might not want them
842 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000843
844 Say N here unless you know what you are doing.
845
846config KERNEL_START
847 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000848 default PAGE_OFFSET if PAGE_OFFSET_BOOL
849 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000850 default "0xc0000000"
851
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000852config PHYSICAL_START_BOOL
853 bool "Set physical address where the kernel is loaded"
854 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
855 help
856 This gives the physical address where the kernel is loaded.
857
858 Say N here unless you know what you are doing.
859
860config PHYSICAL_START
861 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
862 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
863 default "0x00000000"
864
865config PHYSICAL_ALIGN
866 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800867 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000868 help
869 This value puts the alignment restrictions on physical address
870 where kernel is loaded and run from. Kernel is compiled for an
871 address which meets above alignment restriction.
872
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000873config TASK_SIZE_BOOL
874 bool "Set custom user task size"
875 depends on ADVANCED_OPTIONS
876 help
877 This option allows you to set the amount of virtual address space
878 allocated to user tasks. This can be useful in optimizing the
879 virtual memory layout of the system.
880
881 Say N here unless you know what you are doing.
882
883config TASK_SIZE
884 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500885 default "0x80000000" if PPC_PREP || PPC_8xx
886 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000887
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000888config CONSISTENT_SIZE_BOOL
889 bool "Set custom consistent memory pool size"
890 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
891 help
892 This option allows you to set the size of the
893 consistent memory pool. This pool of virtual memory
894 is used to make consistent memory allocations.
895
896config CONSISTENT_SIZE
897 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
898 default "0x00200000" if NOT_COHERENT_CACHE
899
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000900config PIN_TLB
901 bool "Pinned Kernel TLBs (860 ONLY)"
902 depends on ADVANCED_OPTIONS && 8xx
903endmenu
904
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000905if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000906config RELOCATABLE
907 bool "Build a relocatable kernel"
908 help
909 This builds a kernel image that is capable of running anywhere
910 in the RMA (real memory area) at any 16k-aligned base address.
911 The kernel is linked as a position-independent executable (PIE)
912 and contains dynamic relocations which are processed early
913 in the bootup process.
914
915 One use is for the kexec on panic case where the recovery kernel
916 must live at a different physical address than the primary
917 kernel.
918
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000919config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000920 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000921 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000922config KERNEL_START
923 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000924 default "0xc000000000000000"
925config PHYSICAL_START
926 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000927 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000928endif
929
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000930source "net/Kconfig"
931
932source "drivers/Kconfig"
933
934source "fs/Kconfig"
935
Li Yang98658532006-10-03 23:10:46 -0500936source "arch/powerpc/sysdev/qe_lib/Kconfig"
937
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000938source "lib/Kconfig"
939
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000940source "arch/powerpc/Kconfig.debug"
941
942source "security/Kconfig"
943
944config KEYS_COMPAT
945 bool
946 depends on COMPAT && KEYS
947 default y
948
949source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000950
951config PPC_CLOCK
952 bool
953 default n
David Brownell9483a572008-07-23 21:26:48 -0700954 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000955
956config PPC_LIB_RHEAP
957 bool
958
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500959source "arch/powerpc/kvm/Kconfig"