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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 Rostedt606576c2008-10-06 19:06:12 -0400111 select HAVE_FUNCTION_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700112 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100113 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700114 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700115 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500116 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500117 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800118 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000119 select HAVE_ARCH_TRACEHOOK
David S. Millerd9b2b2a2008-02-13 16:56:49 -0800120 select HAVE_LMB
Takashi Iwai7ff86b02008-07-16 02:20:11 +0200121 select HAVE_DMA_ATTRS if PPC64
Jens Axboeb7d7a242008-06-26 11:22:13 +0200122 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400123 select HAVE_OPROFILE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000124
125config EARLY_PRINTK
126 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100127 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000128
129config COMPAT
130 bool
131 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800132 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000133
134config SYSVIPC_COMPAT
135 bool
136 depends on COMPAT && SYSVIPC
137 default y
138
139# All PPC32s use generic nvram driver through ppc_md
140config GENERIC_NVRAM
141 bool
142 default y if PPC32
143
144config SCHED_NO_NO_OMIT_FRAME_POINTER
145 bool
146 default y
147
148config ARCH_MAY_HAVE_PC_FDC
149 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100150 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000151
Kumar Gala08264cb2006-01-10 21:43:56 -0600152config PPC_OF
153 def_bool y
154
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000155config OF
156 def_bool y
157
Kumar Gala08264cb2006-01-10 21:43:56 -0600158config PPC_UDBG_16550
159 bool
160 default n
161
Kumar Gala08264cb2006-01-10 21:43:56 -0600162config GENERIC_TBSYNC
163 bool
164 default y if PPC32 && SMP
165 default n
166
Al Viroe65e1fc2006-09-12 03:04:40 -0400167config AUDIT_ARCH
168 bool
169 default y
170
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800171config GENERIC_BUG
172 bool
173 default y
174 depends on BUG
175
Johannes Bergb3028872007-03-20 05:18:02 +1100176config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500177 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100178 bool
179
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600180config DEFAULT_UIMAGE
181 bool
182 help
183 Used to allow a board to specify it wants a uImage built by default
184 default n
185
Scott Woodb09c1642008-01-17 16:31:40 -0600186config REDBOOT
187 bool
188
Johannes Berg801e4062007-12-08 02:12:39 +0100189config HIBERNATE_32
Johannes Berg543b9fd2007-05-03 22:31:38 +1000190 bool
Johannes Berg801e4062007-12-08 02:12:39 +0100191 depends on (PPC_PMAC && !SMP) || BROKEN
192 default y
193
194config HIBERNATE_64
195 bool
196 depends on BROKEN || (PPC_PMAC64 && EXPERIMENTAL)
197 default y
198
199config ARCH_HIBERNATION_POSSIBLE
200 bool
201 depends on (PPC64 && HIBERNATE_64) || (PPC32 && HIBERNATE_32)
Johannes Berg543b9fd2007-05-03 22:31:38 +1000202 default y
203
Johannes Bergf4cb5702007-12-08 02:14:00 +0100204config ARCH_SUSPEND_POSSIBLE
205 def_bool y
Scott Woodd49747b2007-10-09 12:37:13 -0500206 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100207
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100208config PPC_DCR_NATIVE
209 bool
210 default n
211
212config PPC_DCR_MMIO
213 bool
214 default n
215
216config PPC_DCR
217 bool
218 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
219 default y
220
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100221config PPC_OF_PLATFORM_PCI
222 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100223 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100224 depends on PPC64 # not supported on 32 bits yet
225 default n
226
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000227source "init/Kconfig"
228
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700229source "kernel/Kconfig.freezer"
230
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100231source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500232source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000233
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000234menu "Kernel options"
235
236config HIGHMEM
237 bool "High memory support"
238 depends on PPC32
239
Tony Breeds1ad74992007-09-21 13:26:03 +1000240source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000241source kernel/Kconfig.hz
242source kernel/Kconfig.preempt
243source "fs/Kconfig.binfmt"
244
Mel Gormanba72cb82007-11-28 16:21:13 -0800245config HUGETLB_PAGE_SIZE_VARIABLE
246 bool
247 depends on HUGETLB_PAGE
248 default y
249
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000250config MATH_EMULATION
251 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600252 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000253 ---help---
254 Some PowerPC chips designed for embedded applications do not have
255 a floating-point unit and therefore do not implement the
256 floating-point instructions in the PowerPC instruction set. If you
257 say Y here, the kernel will include code to emulate a floating-point
258 unit, which will allow programs that use floating-point
259 instructions to run.
260
Scott Wood5dd57a12007-09-18 15:29:35 -0500261config 8XX_MINIMAL_FPEMU
262 bool "Minimal math emulation for 8xx"
263 depends on 8xx && !MATH_EMULATION
264 help
265 Older arch/ppc kernels still emulated a few floating point
266 instructions such as load and store, even when full math
267 emulation is disabled. Say "Y" here if you want to preserve
268 this behavior.
269
270 It is recommended that you build a soft-float userspace instead.
271
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000272config IOMMU_VMERGE
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000273 bool "Enable IOMMU virtual merging"
274 depends on PPC64
275 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000276 help
277 Cause IO segments sent to a device for DMA to be merged virtually
278 by the IOMMU when they happen to have been allocated contiguously.
279 This doesn't add pressure to the IOMMU allocator. However, some
280 drivers don't support getting large merged segments coming back
Linas Vepstas768cc2d2007-07-18 02:09:35 +1000281 from *_map_sg().
282
283 Most drivers don't have this problem; it is safe to say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000284
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800285config IOMMU_HELPER
286 def_bool PPC64
287
Becky Bruce15e09c02008-11-20 06:49:16 +0000288config PPC_NEED_DMA_SYNC_OPS
289 def_bool y
290 depends on NOT_COHERENT_CACHE
291
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000292config HOTPLUG_CPU
293 bool "Support for enabling/disabling CPUs"
294 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
295 ---help---
296 Say Y here to be able to disable and re-enable individual
297 CPUs at runtime on SMP machines.
298
299 Say N if you are unsure.
300
Yasunori Gotocc576372006-06-29 02:24:27 -0700301config ARCH_ENABLE_MEMORY_HOTPLUG
302 def_bool y
303
Badari Pulavartya99824f2008-02-05 00:10:18 -0800304config ARCH_HAS_WALK_MEMORY
305 def_bool y
306
Badari Pulavarty14824712008-02-05 00:10:17 -0800307config ARCH_ENABLE_MEMORY_HOTREMOVE
308 def_bool y
309
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000310config KEXEC
311 bool "kexec system call (EXPERIMENTAL)"
Dale Farnsworthfd4ba7e2007-05-12 10:58:43 +1000312 depends on (PPC_PRPMC2800 || PPC_MULTIPLATFORM) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000313 help
314 kexec is a system call that implements the ability to shutdown your
315 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400316 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000317 you can start any kernel with it, not just Linux.
318
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400319 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000320
321 It is an ongoing process to be certain the hardware in a machine
322 is properly shutdown, so do not be surprised if this code does not
323 initially work for you. It may help to enable device hotplugging
324 support. As of this writing the exact hardware interface is
325 strongly in flux, so no good recommendation can be made.
326
Haren Mynenie8625d462006-01-14 13:48:25 -0800327config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000328 bool "Build a kdump crash kernel"
Dale Farnsworthf8f50b12008-12-17 10:09:26 +0000329 depends on (PPC64 && RELOCATABLE) || 6xx
Haren Mynenie8625d462006-01-14 13:48:25 -0800330 help
331 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000332 The same kernel binary can be used as production kernel and dump
333 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800334
Manish Ahuja242f2712008-03-22 10:50:50 +1100335config PHYP_DUMP
336 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
337 depends on PPC_PSERIES && EXPERIMENTAL
338 help
339 Hypervisor-assisted dump is meant to be a kdump replacement
340 offering robustness and speed not possible without system
341 hypervisor assistence.
342
343 If unsure, say "N"
344
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000345config PPCBUG_NVRAM
346 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
347 default y if PPC_PREP
348
349config IRQ_ALL_CPUS
350 bool "Distribute interrupts on all CPUs by default"
351 depends on SMP && !MV64360
352 help
353 This option gives the kernel permission to distribute IRQs across
354 multiple CPUs. Saying N here will route all IRQs to the first
355 CPU. Generally saying Y is safe, although some problems have been
356 reported with SMP Power Macintoshes with this option enabled.
357
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700358config NUMA
359 bool "NUMA support"
360 depends on PPC64
361 default y if SMP && PPC_PSERIES
362
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700363config NODES_SHIFT
364 int
365 default "4"
366 depends on NEED_MULTIPLE_NODES
367
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000368config ARCH_SELECT_MEMORY_MODEL
369 def_bool y
370 depends on PPC64
371
372config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000373 def_bool y
374 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000375
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000376config ARCH_SPARSEMEM_ENABLE
377 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000378 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700379 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100380
381config ARCH_SPARSEMEM_DEFAULT
382 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100383 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000384
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700385config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000386 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700387
388source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000389
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800390config ARCH_MEMORY_PROBE
391 def_bool y
392 depends on MEMORY_HOTPLUG
393
Andy Whitcroft75167952006-10-21 10:24:14 -0700394# Some NUMA nodes have memory ranges that span
395# other nodes. Even though a pfn is valid and
396# between a node's start and end pfns, it may not
397# reside on that node. See memmap_init_zone()
398# for details.
399config NODES_SPAN_OTHER_NODES
400 def_bool y
401 depends on NEED_MULTIPLE_NODES
402
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000403config PPC_HAS_HASH_64K
404 bool
405 depends on PPC64
406 default n
407
Ilya Yanokca9153a2008-12-11 04:55:41 +0300408choice
409 prompt "Page size"
410 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100411 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300412 Select the kernel logical page size. Increasing the page size
413 will reduce software overhead at each page boundary, allow
414 hardware prefetch mechanisms to be more effective, and allow
415 larger dma transfers increasing IO efficiency and reducing
416 overhead. However the utilization of memory will increase.
417 For example, each cached file will using a multiple of the
418 page size to hold its contents and the difference between the
419 end of file and the end of page is wasted.
420
421 Some dedicated systems, such as software raid serving with
422 accelerated calculations, have shown significant increases.
423
424 If you configure a 64 bit kernel for 64k pages but the
425 processor does not support them, then the kernel will simulate
426 them with 4k pages, loading them on demand, but with the
427 reduced software overhead and larger internal fragmentation.
428 For the 32 bit kernel, a large page option will not be offered
429 unless it is supported by the configured processor.
430
431 If unsure, choose 4K_PAGES.
432
433config PPC_4K_PAGES
434 bool "4k page size"
435
436config PPC_16K_PAGES
437 bool "16k page size" if 44x
438
439config PPC_64K_PAGES
440 bool "64k page size" if 44x || PPC_STD_MMU_64
441 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
442
443endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100444
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000445config FORCE_MAX_ZONEORDER
446 int "Maximum zone order"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300447 range 9 64 if PPC_STD_MMU_64 && PPC_64K_PAGES
448 default "9" if PPC_STD_MMU_64 && PPC_64K_PAGES
449 range 13 64 if PPC_STD_MMU_64 && !PPC_64K_PAGES
450 default "13" if PPC_STD_MMU_64 && !PPC_64K_PAGES
451 range 9 64 if PPC_STD_MMU_32 && PPC_16K_PAGES
452 default "9" if PPC_STD_MMU_32 && PPC_16K_PAGES
453 range 7 64 if PPC_STD_MMU_32 && PPC_64K_PAGES
454 default "7" if PPC_STD_MMU_32 && PPC_64K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000455 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000456 default "11"
457 help
458 The kernel memory allocator divides physically contiguous memory
459 blocks into "zones", where each zone is a power of two number of
460 pages. This option selects the largest power of two that the kernel
461 keeps in the memory allocator. If you need to allocate very large
462 blocks of physically contiguous memory, then you may need to
463 increase this value.
464
465 This config option is actually maximum order plus one. For example,
466 a value of 11 means that the largest free memory block is 2^10 pages.
467
468 The page size is not necessarily 4KB. For example, on 64-bit
469 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
470 this in mind when choosing a value for this option.
471
Paul Mackerrasfa282372008-01-24 08:35:13 +1100472config PPC_SUBPAGE_PROT
473 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300474 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100475 help
476 This option adds support for a system call to allow user programs
477 to set access permissions (read/write, readonly, or no access)
478 on the 4k subpages of each 64k page.
479
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000480config SCHED_SMT
481 bool "SMT (Hyperthreading) scheduler support"
482 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000483 help
484 SMT scheduler support improves the CPU scheduler's decision making
485 when dealing with POWER5 cpus at a cost of slightly increased
486 overhead in some places. If unsure say N here.
487
488config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000489 bool "Support for device tree in /proc"
490 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000491 help
492 This option adds a device-tree directory under /proc which contains
493 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000494 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000495
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000496config CMDLINE_BOOL
497 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000498
499config CMDLINE
500 string "Initial kernel command string"
501 depends on CMDLINE_BOOL
502 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
503 help
504 On some platforms, there is currently no way for the boot loader to
505 pass arguments to the kernel. For these platforms, you can supply
506 some command-line options at build time by entering them here. In
507 most cases you will need to specify the root device here.
508
Grant Likelyc356aa42008-07-09 09:41:52 -0600509config EXTRA_TARGETS
510 string "Additional default image types"
511 help
512 List additional targets to be built by the bootwrapper here (separated
513 by spaces). This is useful for targets that depend of device tree
514 files in the .dts directory.
515
516 Targets in this list will be build as part of the default build
517 target, or when the user does a 'make zImage' or a
518 'make zImage.initrd'.
519
520 If unsure, leave blank
521
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000522if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500523config ARCH_WANTS_FREEZER_CONTROL
524 def_bool y
525 depends on ADB_PMU
526
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000527source kernel/power/Kconfig
528endif
529
530config SECCOMP
531 bool "Enable seccomp to safely compute untrusted bytecode"
532 depends on PROC_FS
533 default y
534 help
535 This kernel feature is useful for number crunching applications
536 that may need to compute untrusted bytecode during their
537 execution. By using pipes or other transports made available to
538 the process as file descriptors supporting the read/write
539 syscalls, it's possible to isolate those applications in
540 their own address space using seccomp. Once seccomp is
541 enabled via /proc/<pid>/seccomp, it cannot be disabled
542 and the task is only allowed to execute a few safe syscalls
543 defined by each seccomp mode.
544
545 If unsure, say Y. Only embedded should say N here.
546
547endmenu
548
549config ISA_DMA_API
550 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100551 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000552
553menu "Bus options"
554
555config ISA
556 bool "Support for ISA-bus hardware"
557 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000558 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000559 help
560 Find out whether you have ISA slots on your motherboard. ISA is the
561 name of a bus system, i.e. the way the CPU talks to the other stuff
562 inside your box. If you have an Apple machine, say N here; if you
563 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
564 you have an embedded board, consult your board documentation.
565
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800566config ZONE_DMA
567 bool
568 default y
569
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000570config GENERIC_ISA_DMA
571 bool
572 depends on PPC64 || POWER4 || 6xx && !CPM2
573 default y
574
Paul Mackerras25635c72005-10-26 16:36:55 +1000575config PPC_INDIRECT_PCI
576 bool
577 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600578 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000579 default n
580
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000581config EISA
582 bool
583
584config SBUS
585 bool
586
Kumar Gala08264cb2006-01-10 21:43:56 -0600587config FSL_SOC
588 bool
589
Roy Zang55c44992007-07-10 18:44:34 +0800590config FSL_PCI
591 bool
592 select PPC_INDIRECT_PCI
593
Stefan Roese2a706912008-03-26 22:39:50 +1100594config 4xx_SOC
595 bool
596
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400597config FSL_LBC
598 bool
599 help
600 Freescale Localbus support
601
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400602config FSL_GTM
603 bool
604 depends on PPC_83xx || QUICC_ENGINE || CPM2
605 help
606 Freescale General-purpose Timers support
607
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000608# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
609config MCA
610 bool
611
John Rigbyb5005632008-06-26 11:07:56 -0600612# Platforms that what PCI turned unconditionally just do select PCI
613# in their config node. Platforms that want to choose at config
614# time should select PPC_PCI_CHOICE
615config PPC_PCI_CHOICE
616 bool
617
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000618config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600619 bool "PCI support" if PPC_PCI_CHOICE
620 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Jon Loeliger53158622006-08-09 10:37:28 -0500621 && !PPC_85xx && !PPC_86xx
David Gibsonf21f49e2007-06-13 14:52:54 +1000622 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000623 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000624 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000625 help
626 Find out whether your system includes a PCI bus. PCI is the name of
627 a bus system, i.e. the way the CPU talks to the other stuff inside
628 your box. If you say Y here, the kernel will include drivers and
629 infrastructure code to support PCI bus devices.
630
631config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600632 def_bool PCI
633
634config PCI_SYSCALL
635 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000636
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000637config PCI_QSPAN
638 bool "QSpan PCI"
639 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000640 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000641 help
642 Say Y here if you have a system based on a Motorola 8xx-series
643 embedded processor with a QSPAN PCI interface, otherwise say N.
644
645config PCI_8260
646 bool
647 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000648 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000649 default y
650
651config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700652 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500653 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000654 default y
655
656choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700657 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000658 depends on 8260_PCI9
659
660config 8260_PCI9_IDMA1
661 bool "IDMA1"
662
663config 8260_PCI9_IDMA2
664 bool "IDMA2"
665
666config 8260_PCI9_IDMA3
667 bool "IDMA3"
668
669config 8260_PCI9_IDMA4
670 bool "IDMA4"
671
672endchoice
673
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500674source "drivers/pci/pcie/Kconfig"
675
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000676source "drivers/pci/Kconfig"
677
678source "drivers/pcmcia/Kconfig"
679
680source "drivers/pci/hotplug/Kconfig"
681
Zhang Weif1f389d2008-04-18 13:33:39 -0700682config HAS_RAPIDIO
683 bool
684 default n
685
686config RAPIDIO
687 bool "RapidIO support"
688 depends on HAS_RAPIDIO
689 help
690 If you say Y here, the kernel will include drivers and
691 infrastructure code to support RapidIO interconnect devices.
692
693source "drivers/rapidio/Kconfig"
694
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000695endmenu
696
697menu "Advanced setup"
698 depends on PPC32
699
700config ADVANCED_OPTIONS
701 bool "Prompt for advanced kernel configuration options"
702 help
703 This option will enable prompting for a variety of advanced kernel
704 configuration options. These options can cause the kernel to not
705 work if they are set incorrectly, but can be used to optimize certain
706 aspects of kernel memory management.
707
708 Unless you know what you are doing, say N here.
709
710comment "Default settings for advanced configuration options are used"
711 depends on !ADVANCED_OPTIONS
712
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000713config LOWMEM_SIZE_BOOL
714 bool "Set maximum low memory"
715 depends on ADVANCED_OPTIONS
716 help
717 This option allows you to set the maximum amount of memory which
718 will be used as "low memory", that is, memory which the kernel can
719 access directly, without having to set up a kernel virtual mapping.
720 This can be useful in optimizing the layout of kernel virtual
721 memory.
722
723 Say N here unless you know what you are doing.
724
725config LOWMEM_SIZE
726 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
727 default "0x30000000"
728
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000729config RELOCATABLE
730 bool "Build a relocatable kernel (EXPERIMENTAL)"
731 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
732 help
733 This builds a kernel image that is capable of running at the
734 location the kernel is loaded at (some alignment restrictions may
735 exist).
736
737 One use is for the kexec on panic case where the recovery kernel
738 must live at a different physical address than the primary
739 kernel.
740
741 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
742 it has been loaded at and the compile time physical addresses
743 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
744 setting can still be useful to bootwrappers that need to know the
745 load location of the kernel (eg. u-boot/mkimage).
746
747config PAGE_OFFSET_BOOL
748 bool "Set custom page offset address"
749 depends on ADVANCED_OPTIONS
750 help
751 This option allows you to set the kernel virtual address at which
752 the kernel will map low memory. This can be useful in optimizing
753 the virtual memory layout of the system.
754
755 Say N here unless you know what you are doing.
756
757config PAGE_OFFSET
758 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
759 default "0xc0000000"
760
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000761config KERNEL_START_BOOL
762 bool "Set custom kernel base address"
763 depends on ADVANCED_OPTIONS
764 help
765 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000766 the kernel will be loaded. Normally this should match PAGE_OFFSET
767 however there are times (like kdump) that one might not want them
768 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000769
770 Say N here unless you know what you are doing.
771
772config KERNEL_START
773 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000774 default PAGE_OFFSET if PAGE_OFFSET_BOOL
775 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000776 default "0xc0000000"
777
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000778config PHYSICAL_START_BOOL
779 bool "Set physical address where the kernel is loaded"
780 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
781 help
782 This gives the physical address where the kernel is loaded.
783
784 Say N here unless you know what you are doing.
785
786config PHYSICAL_START
787 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
788 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
789 default "0x00000000"
790
791config PHYSICAL_ALIGN
792 hex
793 default "0x10000000" if FSL_BOOKE
794 help
795 This value puts the alignment restrictions on physical address
796 where kernel is loaded and run from. Kernel is compiled for an
797 address which meets above alignment restriction.
798
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000799config TASK_SIZE_BOOL
800 bool "Set custom user task size"
801 depends on ADVANCED_OPTIONS
802 help
803 This option allows you to set the amount of virtual address space
804 allocated to user tasks. This can be useful in optimizing the
805 virtual memory layout of the system.
806
807 Say N here unless you know what you are doing.
808
809config TASK_SIZE
810 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500811 default "0x80000000" if PPC_PREP || PPC_8xx
812 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000813
814config CONSISTENT_START_BOOL
815 bool "Set custom consistent memory pool address"
816 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
817 help
818 This option allows you to set the base virtual address
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200819 of the consistent memory pool. This pool of virtual
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000820 memory is used to make consistent memory allocations.
821
822config CONSISTENT_START
823 hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
Scott Woodccf0d682007-07-16 11:28:18 -0500824 default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000825 default "0xff100000" if NOT_COHERENT_CACHE
826
827config CONSISTENT_SIZE_BOOL
828 bool "Set custom consistent memory pool size"
829 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
830 help
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200831 This option allows you to set the size of the
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000832 consistent memory pool. This pool of virtual memory
833 is used to make consistent memory allocations.
834
835config CONSISTENT_SIZE
836 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
837 default "0x00200000" if NOT_COHERENT_CACHE
838
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000839config PIN_TLB
840 bool "Pinned Kernel TLBs (860 ONLY)"
841 depends on ADVANCED_OPTIONS && 8xx
842endmenu
843
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000844if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000845config RELOCATABLE
846 bool "Build a relocatable kernel"
847 help
848 This builds a kernel image that is capable of running anywhere
849 in the RMA (real memory area) at any 16k-aligned base address.
850 The kernel is linked as a position-independent executable (PIE)
851 and contains dynamic relocations which are processed early
852 in the bootup process.
853
854 One use is for the kexec on panic case where the recovery kernel
855 must live at a different physical address than the primary
856 kernel.
857
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000858config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000859 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000860 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000861config KERNEL_START
862 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000863 default "0xc000000000000000"
864config PHYSICAL_START
865 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000866 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000867endif
868
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000869source "net/Kconfig"
870
871source "drivers/Kconfig"
872
873source "fs/Kconfig"
874
875# XXX source "arch/ppc/8xx_io/Kconfig"
876
877# XXX source "arch/ppc/8260_io/Kconfig"
878
Li Yang98658532006-10-03 23:10:46 -0500879source "arch/powerpc/sysdev/qe_lib/Kconfig"
880
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000881source "lib/Kconfig"
882
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000883source "arch/powerpc/Kconfig.debug"
884
885source "security/Kconfig"
886
887config KEYS_COMPAT
888 bool
889 depends on COMPAT && KEYS
890 default y
891
892source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000893
894config PPC_CLOCK
895 bool
896 default n
David Brownell9483a572008-07-23 21:26:48 -0700897 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000898
899config PPC_LIB_RHEAP
900 bool
901
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500902source "arch/powerpc/kvm/Kconfig"