blob: 182743b46e0a972aa276d6c3c2f358ca155571d5 [file] [log] [blame]
Arnd Bergmanna0ae9c72007-06-13 02:30:17 +10001source "arch/powerpc/platforms/Kconfig.cputype"
Johannes Berg17e638b2007-03-19 11:53:53 +01002
Paul Mackerras14cf11a2005-09-26 16:04:21 +10003config PPC32
4 bool
5 default y if !PPC64
6
7config 64BIT
8 bool
9 default y if PPC64
10
Stephen Rothwell2578bfa2007-09-21 10:16:20 +100011config WORD_SIZE
12 int
13 default 64 if PPC64
14 default 32 if !PPC64
15
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -070016config ARCH_PHYS_ADDR_T_64BIT
17 def_bool PPC64 || PHYS_64BIT
18
Paul Mackerras14cf11a2005-09-26 16:04:21 +100019config MMU
20 bool
21 default y
22
Tony Breedsaa3be5f2007-09-21 13:26:02 +100023config GENERIC_CMOS_UPDATE
24 def_bool y
25
Tony Breeds4a4cfe32007-09-22 07:35:52 +100026config GENERIC_TIME
27 def_bool y
28
29config GENERIC_TIME_VSYSCALL
30 def_bool y
31
Tony Breedsd831d0b2007-09-21 13:26:03 +100032config GENERIC_CLOCKEVENTS
33 def_bool y
34
Paul Mackerras14cf11a2005-09-26 16:04:21 +100035config GENERIC_HARDIRQS
36 bool
37 default y
38
Michael Ellerman8e27f4d2009-04-22 15:31:45 +000039config GENERIC_HARDIRQS_NO__DO_IRQ
40 bool
41 default y
42
Tejun Heoc2a7e812009-08-14 15:00:53 +090043config HAVE_SETUP_PER_CPU_AREA
Tejun Heoe74e3962009-03-30 19:07:44 +090044 def_bool PPC64
45
Tejun Heoc2a7e812009-08-14 15:00:53 +090046config NEED_PER_CPU_EMBED_FIRST_CHUNK
travis@sgi.comb32ef632008-01-30 13:32:51 +010047 def_bool PPC64
48
Ingo Molnar0d7012a2006-06-29 02:24:43 -070049config IRQ_PER_CPU
50 bool
51 default y
52
Michael Ellerman551b81f2009-10-13 19:44:44 +000053config NR_IRQS
54 int "Number of virtual interrupt numbers"
Anton Blanchard859aefc2010-01-31 01:14:03 +000055 range 32 32768
Michael Ellerman551b81f2009-10-13 19:44:44 +000056 default "512"
57 help
58 This defines the number of virtual interrupt numbers the kernel
59 can manage. Virtual interrupt numbers are what you see in
60 /proc/interrupts. If you configure your system to have too few,
61 drivers will fail to load or worse - handle with care.
62
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100063config STACKTRACE_SUPPORT
64 bool
65 default y
66
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100067config HAVE_LATENCYTOP_SUPPORT
68 def_bool y
69
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100070config TRACE_IRQFLAGS_SUPPORT
71 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100072 default y
73
74config LOCKDEP_SUPPORT
75 bool
76 default y
77
Paul Mackerras14cf11a2005-09-26 16:04:21 +100078config RWSEM_GENERIC_SPINLOCK
79 bool
80
81config RWSEM_XCHGADD_ALGORITHM
82 bool
83 default y
84
Nick Piggin95c354f2008-01-30 13:31:20 +010085config GENERIC_LOCKBREAK
86 bool
87 default y
88 depends on SMP && PREEMPT
89
David Howellsf0d1b0b2006-12-08 02:37:49 -080090config ARCH_HAS_ILOG2_U32
91 bool
David Howellsef55d532006-12-08 02:37:53 -080092 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080093
94config ARCH_HAS_ILOG2_U64
95 bool
David Howellsef55d532006-12-08 02:37:53 -080096 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080097
Akinobu Mitae779b2f2006-03-26 01:39:33 -080098config GENERIC_HWEIGHT
99 bool
100 default y
101
Jon Mason0a9cb462006-05-19 15:35:32 -0500102config GENERIC_FIND_NEXT_BIT
103 bool
104 default y
105
Anton Vorontsovb7ce3412008-04-11 23:06:36 +1000106config GENERIC_GPIO
107 bool
108 help
109 Generic GPIO API support
110
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700111config ARCH_NO_VIRT_TO_BUS
112 def_bool PPC64
113
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000114config PPC
115 bool
116 default y
Steven Rostedt2b79d692009-01-06 18:49:17 +0000117 select HAVE_FTRACE_MCOUNT_RECORD
118 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400119 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500120 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700121 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100122 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700123 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700124 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500125 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500126 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800127 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000128 select HAVE_ARCH_TRACEHOOK
Yinghai Lu95f72d12010-07-12 14:36:09 +1000129 select HAVE_MEMBLOCK
FUJITA Tomonori46bab4e2009-08-04 19:08:26 +0000130 select HAVE_DMA_ATTRS
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000131 select HAVE_DMA_API_DEBUG
Jens Axboeb7d7a242008-06-26 11:22:13 +0200132 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400133 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100134 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000135 select GENERIC_ATOMIC64 if PPC32
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200136 select HAVE_PERF_EVENTS
Mahesh Salgaonkar359e4282010-04-07 18:10:20 +1000137 select HAVE_REGS_AND_STACK_ACCESS_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000138
139config EARLY_PRINTK
140 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100141 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000142
143config COMPAT
144 bool
145 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800146 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000147
148config SYSVIPC_COMPAT
149 bool
150 depends on COMPAT && SYSVIPC
151 default y
152
153# All PPC32s use generic nvram driver through ppc_md
154config GENERIC_NVRAM
155 bool
156 default y if PPC32
157
Ingo Molnarae1e9132008-11-11 09:05:16 +0100158config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000159 bool
160 default y
161
162config ARCH_MAY_HAVE_PC_FDC
163 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100164 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000165
Kumar Gala08264cb2006-01-10 21:43:56 -0600166config PPC_OF
167 def_bool y
168
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000169config OF
170 def_bool y
Grant Likelye169cfb2009-11-23 14:53:09 -0700171 select OF_FLATTREE
Stephen Rothwell97e873e2007-05-01 16:26:07 +1000172
Kumar Gala08264cb2006-01-10 21:43:56 -0600173config PPC_UDBG_16550
174 bool
175 default n
176
Kumar Gala08264cb2006-01-10 21:43:56 -0600177config GENERIC_TBSYNC
178 bool
179 default y if PPC32 && SMP
180 default n
181
Al Viroe65e1fc2006-09-12 03:04:40 -0400182config AUDIT_ARCH
183 bool
184 default y
185
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800186config GENERIC_BUG
187 bool
188 default y
189 depends on BUG
190
Johannes Bergb3028872007-03-20 05:18:02 +1100191config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500192 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100193 bool
194
David Gibson9fffb552009-04-30 15:25:53 +1000195config DTC
196 bool
197 default y
198
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600199config DEFAULT_UIMAGE
200 bool
201 help
202 Used to allow a board to specify it wants a uImage built by default
203 default n
204
Scott Woodb09c1642008-01-17 16:31:40 -0600205config REDBOOT
206 bool
207
Johannes Berg801e4062007-12-08 02:12:39 +0100208config ARCH_HIBERNATION_POSSIBLE
209 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000210 default y
211
Johannes Bergf4cb5702007-12-08 02:14:00 +0100212config ARCH_SUSPEND_POSSIBLE
213 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400214 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
215 PPC_85xx || PPC_86xx
Johannes Bergf4cb5702007-12-08 02:14:00 +0100216
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100217config PPC_DCR_NATIVE
218 bool
219 default n
220
221config PPC_DCR_MMIO
222 bool
223 default n
224
225config PPC_DCR
226 bool
227 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
228 default y
229
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100230config PPC_OF_PLATFORM_PCI
231 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100232 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100233 depends on PPC64 # not supported on 32 bits yet
234 default n
235
Akinobu Mita6a11f752009-03-31 15:23:17 -0700236config ARCH_SUPPORTS_DEBUG_PAGEALLOC
237 def_bool y
238
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000239config PPC_ADV_DEBUG_REGS
240 bool
241 depends on 40x || BOOKE
242 default y
243
244config PPC_ADV_DEBUG_IACS
245 int
246 depends on PPC_ADV_DEBUG_REGS
247 default 4 if 44x
248 default 2
249
250config PPC_ADV_DEBUG_DACS
251 int
252 depends on PPC_ADV_DEBUG_REGS
253 default 2
254
255config PPC_ADV_DEBUG_DVCS
256 int
257 depends on PPC_ADV_DEBUG_REGS
258 default 2 if 44x
259 default 0
260
261config PPC_ADV_DEBUG_DAC_RANGE
262 bool
263 depends on PPC_ADV_DEBUG_REGS && 44x
264 default y
265
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000266source "init/Kconfig"
267
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700268source "kernel/Kconfig.freezer"
269
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100270source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500271source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000273menu "Kernel options"
274
275config HIGHMEM
276 bool "High memory support"
277 depends on PPC32
278
Tony Breeds1ad74992007-09-21 13:26:03 +1000279source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000280source kernel/Kconfig.hz
281source kernel/Kconfig.preempt
282source "fs/Kconfig.binfmt"
283
Mel Gormanba72cb82007-11-28 16:21:13 -0800284config HUGETLB_PAGE_SIZE_VARIABLE
285 bool
286 depends on HUGETLB_PAGE
287 default y
288
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000289config MATH_EMULATION
290 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600291 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000292 ---help---
293 Some PowerPC chips designed for embedded applications do not have
294 a floating-point unit and therefore do not implement the
295 floating-point instructions in the PowerPC instruction set. If you
296 say Y here, the kernel will include code to emulate a floating-point
297 unit, which will allow programs that use floating-point
298 instructions to run.
299
Scott Wood5dd57a12007-09-18 15:29:35 -0500300config 8XX_MINIMAL_FPEMU
301 bool "Minimal math emulation for 8xx"
302 depends on 8xx && !MATH_EMULATION
303 help
304 Older arch/ppc kernels still emulated a few floating point
305 instructions such as load and store, even when full math
306 emulation is disabled. Say "Y" here if you want to preserve
307 this behavior.
308
309 It is recommended that you build a soft-float userspace instead.
310
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800311config IOMMU_HELPER
312 def_bool PPC64
313
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000314config SWIOTLB
315 bool "SWIOTLB support"
316 default n
317 select IOMMU_HELPER
318 ---help---
319 Support for IO bounce buffering for systems without an IOMMU.
320 This allows us to DMA to the full physical address space on
321 platforms where the size of a physical address is larger
322 than the bus address. Not all platforms support this.
323
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000324config HOTPLUG_CPU
325 bool "Support for enabling/disabling CPUs"
326 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
327 ---help---
328 Say Y here to be able to disable and re-enable individual
329 CPUs at runtime on SMP machines.
330
331 Say N if you are unsure.
332
Nathan Fontenot12633e82009-11-25 17:23:25 +0000333config ARCH_CPU_PROBE_RELEASE
334 def_bool y
335 depends on HOTPLUG_CPU
336
Yasunori Gotocc576372006-06-29 02:24:27 -0700337config ARCH_ENABLE_MEMORY_HOTPLUG
338 def_bool y
339
Badari Pulavartya99824f2008-02-05 00:10:18 -0800340config ARCH_HAS_WALK_MEMORY
341 def_bool y
342
Badari Pulavarty14824712008-02-05 00:10:17 -0800343config ARCH_ENABLE_MEMORY_HOTREMOVE
344 def_bool y
345
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000346config KEXEC
347 bool "kexec system call (EXPERIMENTAL)"
Sebastian Andrzej Siewiorb3df8952010-04-04 22:19:03 +0200348 depends on (PPC_BOOK3S || (FSL_BOOKE && !SMP)) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000349 help
350 kexec is a system call that implements the ability to shutdown your
351 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400352 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000353 you can start any kernel with it, not just Linux.
354
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400355 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000356
357 It is an ongoing process to be certain the hardware in a machine
358 is properly shutdown, so do not be surprised if this code does not
359 initially work for you. It may help to enable device hotplugging
360 support. As of this writing the exact hardware interface is
361 strongly in flux, so no good recommendation can be made.
362
Haren Mynenie8625d462006-01-14 13:48:25 -0800363config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000364 bool "Build a kdump crash kernel"
Mohan Kumar Mc6ac71a2009-01-06 00:23:01 +0000365 depends on PPC64 || 6xx
366 select RELOCATABLE if PPC64
Haren Mynenie8625d462006-01-14 13:48:25 -0800367 help
368 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000369 The same kernel binary can be used as production kernel and dump
370 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800371
Manish Ahuja242f2712008-03-22 10:50:50 +1100372config PHYP_DUMP
373 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
374 depends on PPC_PSERIES && EXPERIMENTAL
375 help
376 Hypervisor-assisted dump is meant to be a kdump replacement
377 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100378 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100379
380 If unsure, say "N"
381
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000382config PPCBUG_NVRAM
383 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
384 default y if PPC_PREP
385
386config IRQ_ALL_CPUS
387 bool "Distribute interrupts on all CPUs by default"
388 depends on SMP && !MV64360
389 help
390 This option gives the kernel permission to distribute IRQs across
391 multiple CPUs. Saying N here will route all IRQs to the first
392 CPU. Generally saying Y is safe, although some problems have been
393 reported with SMP Power Macintoshes with this option enabled.
394
Michael Ellermancd015702009-10-13 19:45:03 +0000395config SPARSE_IRQ
396 bool "Support sparse irq numbering"
Yang Li9ce91682010-06-28 23:32:57 +0000397 default n
Michael Ellermancd015702009-10-13 19:45:03 +0000398 help
399 This enables support for sparse irqs. This is useful for distro
400 kernels that want to define a high CONFIG_NR_CPUS value but still
401 want to have low kernel memory footprint on smaller machines.
402
403 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
404 out the irq_desc[] array in a more NUMA-friendly way. )
405
Yang Li9ce91682010-06-28 23:32:57 +0000406 If you don't know what to do here, say N.
Michael Ellermancd015702009-10-13 19:45:03 +0000407
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700408config NUMA
409 bool "NUMA support"
410 depends on PPC64
411 default y if SMP && PPC_PSERIES
412
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700413config NODES_SHIFT
414 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000415 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700416 default "4"
417 depends on NEED_MULTIPLE_NODES
418
Anton Blanchardea55bf22009-09-21 19:56:43 +0000419config MAX_ACTIVE_REGIONS
420 int
421 default "256" if PPC64
422 default "32"
423
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000424config ARCH_SELECT_MEMORY_MODEL
425 def_bool y
426 depends on PPC64
427
428config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000429 def_bool y
430 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000431
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000432config ARCH_SPARSEMEM_ENABLE
433 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000434 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700435 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100436
437config ARCH_SPARSEMEM_DEFAULT
438 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100439 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000440
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700441config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000442 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700443
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100444config SYS_SUPPORTS_HUGETLBFS
445 def_bool y
446 depends on PPC_BOOK3S_64
447
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700448source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000449
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800450config ARCH_MEMORY_PROBE
451 def_bool y
452 depends on MEMORY_HOTPLUG
453
Andy Whitcroft75167952006-10-21 10:24:14 -0700454# Some NUMA nodes have memory ranges that span
455# other nodes. Even though a pfn is valid and
456# between a node's start and end pfns, it may not
457# reside on that node. See memmap_init_zone()
458# for details.
459config NODES_SPAN_OTHER_NODES
460 def_bool y
461 depends on NEED_MULTIPLE_NODES
462
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000463config PPC_HAS_HASH_64K
464 bool
465 depends on PPC64
466 default n
467
Yuri Tikhonove1240122009-01-29 01:40:44 +0000468config STDBINUTILS
469 bool "Using standard binutils settings"
470 depends on 44x
471 default y
472 help
473 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
474 Note, that kernel will be able to run only those applications,
475 which had been compiled using binutils later than 2.17.50.0.3 with
476 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
477 the older binutils, you can patch them with a trivial patch, which
478 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
479
Ilya Yanokca9153a2008-12-11 04:55:41 +0300480choice
481 prompt "Page size"
482 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100483 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300484 Select the kernel logical page size. Increasing the page size
485 will reduce software overhead at each page boundary, allow
486 hardware prefetch mechanisms to be more effective, and allow
487 larger dma transfers increasing IO efficiency and reducing
488 overhead. However the utilization of memory will increase.
489 For example, each cached file will using a multiple of the
490 page size to hold its contents and the difference between the
491 end of file and the end of page is wasted.
492
493 Some dedicated systems, such as software raid serving with
494 accelerated calculations, have shown significant increases.
495
496 If you configure a 64 bit kernel for 64k pages but the
497 processor does not support them, then the kernel will simulate
498 them with 4k pages, loading them on demand, but with the
499 reduced software overhead and larger internal fragmentation.
500 For the 32 bit kernel, a large page option will not be offered
501 unless it is supported by the configured processor.
502
503 If unsure, choose 4K_PAGES.
504
505config PPC_4K_PAGES
506 bool "4k page size"
507
508config PPC_16K_PAGES
509 bool "16k page size" if 44x
510
511config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000512 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300513 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
514
Yuri Tikhonove1240122009-01-29 01:40:44 +0000515config PPC_256K_PAGES
516 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000517 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000518 help
519 Make the page size 256k.
520
521 As the ELF standard only requires alignment to support page
522 sizes up to 64k, you will need to compile all of your user
523 space applications with a non-standard binutils settings
524 (see the STDBINUTILS description for details).
525
526 Say N unless you know what you are doing.
527
Ilya Yanokca9153a2008-12-11 04:55:41 +0300528endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100529
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000530config FORCE_MAX_ZONEORDER
531 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000532 range 9 64 if PPC64 && PPC_64K_PAGES
533 default "9" if PPC64 && PPC_64K_PAGES
534 range 13 64 if PPC64 && !PPC_64K_PAGES
535 default "13" if PPC64 && !PPC_64K_PAGES
536 range 9 64 if PPC32 && PPC_16K_PAGES
537 default "9" if PPC32 && PPC_16K_PAGES
538 range 7 64 if PPC32 && PPC_64K_PAGES
539 default "7" if PPC32 && PPC_64K_PAGES
540 range 5 64 if PPC32 && PPC_256K_PAGES
541 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000542 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000543 default "11"
544 help
545 The kernel memory allocator divides physically contiguous memory
546 blocks into "zones", where each zone is a power of two number of
547 pages. This option selects the largest power of two that the kernel
548 keeps in the memory allocator. If you need to allocate very large
549 blocks of physically contiguous memory, then you may need to
550 increase this value.
551
552 This config option is actually maximum order plus one. For example,
553 a value of 11 means that the largest free memory block is 2^10 pages.
554
555 The page size is not necessarily 4KB. For example, on 64-bit
556 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
557 this in mind when choosing a value for this option.
558
Paul Mackerrasfa282372008-01-24 08:35:13 +1100559config PPC_SUBPAGE_PROT
560 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300561 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100562 help
563 This option adds support for a system call to allow user programs
564 to set access permissions (read/write, readonly, or no access)
565 on the 4k subpages of each 64k page.
566
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000567config SCHED_SMT
568 bool "SMT (Hyperthreading) scheduler support"
569 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000570 help
571 SMT scheduler support improves the CPU scheduler's decision making
572 when dealing with POWER5 cpus at a cost of slightly increased
573 overhead in some places. If unsure say N here.
574
575config PROC_DEVICETREE
Paul Mackerras5f296752005-10-17 20:14:59 +1000576 bool "Support for device tree in /proc"
577 depends on PROC_FS
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000578 help
579 This option adds a device-tree directory under /proc which contains
580 an image of the device tree that the kernel copies from Open
Paul Mackerras5f296752005-10-17 20:14:59 +1000581 Firmware or other boot firmware. If unsure, say Y here.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000582
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000583config CMDLINE_BOOL
584 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000585
586config CMDLINE
587 string "Initial kernel command string"
588 depends on CMDLINE_BOOL
589 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
590 help
591 On some platforms, there is currently no way for the boot loader to
592 pass arguments to the kernel. For these platforms, you can supply
593 some command-line options at build time by entering them here. In
594 most cases you will need to specify the root device here.
595
Grant Likelyc356aa42008-07-09 09:41:52 -0600596config EXTRA_TARGETS
597 string "Additional default image types"
598 help
599 List additional targets to be built by the bootwrapper here (separated
600 by spaces). This is useful for targets that depend of device tree
601 files in the .dts directory.
602
603 Targets in this list will be build as part of the default build
604 target, or when the user does a 'make zImage' or a
605 'make zImage.initrd'.
606
607 If unsure, leave blank
608
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000609if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500610config ARCH_WANTS_FREEZER_CONTROL
611 def_bool y
612 depends on ADB_PMU
613
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000614source kernel/power/Kconfig
615endif
616
617config SECCOMP
618 bool "Enable seccomp to safely compute untrusted bytecode"
619 depends on PROC_FS
620 default y
621 help
622 This kernel feature is useful for number crunching applications
623 that may need to compute untrusted bytecode during their
624 execution. By using pipes or other transports made available to
625 the process as file descriptors supporting the read/write
626 syscalls, it's possible to isolate those applications in
627 their own address space using seccomp. Once seccomp is
628 enabled via /proc/<pid>/seccomp, it cannot be disabled
629 and the task is only allowed to execute a few safe syscalls
630 defined by each seccomp mode.
631
632 If unsure, say Y. Only embedded should say N here.
633
634endmenu
635
636config ISA_DMA_API
637 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100638 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000639
640menu "Bus options"
641
642config ISA
643 bool "Support for ISA-bus hardware"
644 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000645 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000646 help
647 Find out whether you have ISA slots on your motherboard. ISA is the
648 name of a bus system, i.e. the way the CPU talks to the other stuff
649 inside your box. If you have an Apple machine, say N here; if you
650 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
651 you have an embedded board, consult your board documentation.
652
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800653config ZONE_DMA
654 bool
655 default y
656
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800657config NEED_DMA_MAP_STATE
658 def_bool (PPC64 || NOT_COHERENT_CACHE)
659
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700660config NEED_SG_DMA_LENGTH
661 def_bool y
662
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000663config GENERIC_ISA_DMA
664 bool
665 depends on PPC64 || POWER4 || 6xx && !CPM2
666 default y
667
Paul Mackerras25635c72005-10-26 16:36:55 +1000668config PPC_INDIRECT_PCI
669 bool
670 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600671 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000672 default n
673
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000674config EISA
675 bool
676
677config SBUS
678 bool
679
Kumar Gala08264cb2006-01-10 21:43:56 -0600680config FSL_SOC
681 bool
682
Roy Zang55c44992007-07-10 18:44:34 +0800683config FSL_PCI
684 bool
685 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600686 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800687
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400688config FSL_PMC
689 bool
690 default y
691 depends on SUSPEND && (PPC_85xx || PPC_86xx)
692 help
693 Freescale MPC85xx/MPC86xx power management controller support
694 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
695
Stefan Roese2a706912008-03-26 22:39:50 +1100696config 4xx_SOC
697 bool
698
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400699config FSL_LBC
700 bool
701 help
702 Freescale Localbus support
703
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400704config FSL_GTM
705 bool
706 depends on PPC_83xx || QUICC_ENGINE || CPM2
707 help
708 Freescale General-purpose Timers support
709
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000710# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
711config MCA
712 bool
713
John Rigbyb5005632008-06-26 11:07:56 -0600714# Platforms that what PCI turned unconditionally just do select PCI
715# in their config node. Platforms that want to choose at config
716# time should select PPC_PCI_CHOICE
717config PPC_PCI_CHOICE
718 bool
719
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000720config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600721 bool "PCI support" if PPC_PCI_CHOICE
722 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000723 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
David Gibsonf21f49e2007-06-13 14:52:54 +1000724 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000725 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000726 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000727 help
728 Find out whether your system includes a PCI bus. PCI is the name of
729 a bus system, i.e. the way the CPU talks to the other stuff inside
730 your box. If you say Y here, the kernel will include drivers and
731 infrastructure code to support PCI bus devices.
732
733config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600734 def_bool PCI
735
736config PCI_SYSCALL
737 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000738
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000739config PCI_QSPAN
740 bool "QSpan PCI"
741 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000742 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000743 help
744 Say Y here if you have a system based on a Motorola 8xx-series
745 embedded processor with a QSPAN PCI interface, otherwise say N.
746
747config PCI_8260
748 bool
749 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000750 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000751 default y
752
753config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700754 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500755 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000756 default y
757
758choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700759 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000760 depends on 8260_PCI9
761
762config 8260_PCI9_IDMA1
763 bool "IDMA1"
764
765config 8260_PCI9_IDMA2
766 bool "IDMA2"
767
768config 8260_PCI9_IDMA3
769 bool "IDMA3"
770
771config 8260_PCI9_IDMA4
772 bool "IDMA4"
773
774endchoice
775
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500776source "drivers/pci/pcie/Kconfig"
777
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000778source "drivers/pci/Kconfig"
779
780source "drivers/pcmcia/Kconfig"
781
782source "drivers/pci/hotplug/Kconfig"
783
Zhang Weif1f389d2008-04-18 13:33:39 -0700784config HAS_RAPIDIO
785 bool
786 default n
787
788config RAPIDIO
789 bool "RapidIO support"
790 depends on HAS_RAPIDIO
791 help
792 If you say Y here, the kernel will include drivers and
793 infrastructure code to support RapidIO interconnect devices.
794
795source "drivers/rapidio/Kconfig"
796
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000797endmenu
798
799menu "Advanced setup"
800 depends on PPC32
801
802config ADVANCED_OPTIONS
803 bool "Prompt for advanced kernel configuration options"
804 help
805 This option will enable prompting for a variety of advanced kernel
806 configuration options. These options can cause the kernel to not
807 work if they are set incorrectly, but can be used to optimize certain
808 aspects of kernel memory management.
809
810 Unless you know what you are doing, say N here.
811
812comment "Default settings for advanced configuration options are used"
813 depends on !ADVANCED_OPTIONS
814
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000815config LOWMEM_SIZE_BOOL
816 bool "Set maximum low memory"
817 depends on ADVANCED_OPTIONS
818 help
819 This option allows you to set the maximum amount of memory which
820 will be used as "low memory", that is, memory which the kernel can
821 access directly, without having to set up a kernel virtual mapping.
822 This can be useful in optimizing the layout of kernel virtual
823 memory.
824
825 Say N here unless you know what you are doing.
826
827config LOWMEM_SIZE
828 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
829 default "0x30000000"
830
Trent Piepho96051462008-12-08 19:34:58 -0800831config LOWMEM_CAM_NUM_BOOL
832 bool "Set number of CAMs to use to map low memory"
833 depends on ADVANCED_OPTIONS && FSL_BOOKE
834 help
835 This option allows you to set the maximum number of CAM slots that
836 will be used to map low memory. There are a limited number of slots
837 available and even more limited number that will fit in the L1 MMU.
838 However, using more entries will allow mapping more low memory. This
839 can be useful in optimizing the layout of kernel virtual memory.
840
841 Say N here unless you know what you are doing.
842
843config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400844 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800845 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
846 default 3
847
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000848config RELOCATABLE
849 bool "Build a relocatable kernel (EXPERIMENTAL)"
850 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
851 help
852 This builds a kernel image that is capable of running at the
853 location the kernel is loaded at (some alignment restrictions may
854 exist).
855
856 One use is for the kexec on panic case where the recovery kernel
857 must live at a different physical address than the primary
858 kernel.
859
860 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
861 it has been loaded at and the compile time physical addresses
862 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
863 setting can still be useful to bootwrappers that need to know the
864 load location of the kernel (eg. u-boot/mkimage).
865
866config PAGE_OFFSET_BOOL
867 bool "Set custom page offset address"
868 depends on ADVANCED_OPTIONS
869 help
870 This option allows you to set the kernel virtual address at which
871 the kernel will map low memory. This can be useful in optimizing
872 the virtual memory layout of the system.
873
874 Say N here unless you know what you are doing.
875
876config PAGE_OFFSET
877 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
878 default "0xc0000000"
879
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000880config KERNEL_START_BOOL
881 bool "Set custom kernel base address"
882 depends on ADVANCED_OPTIONS
883 help
884 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000885 the kernel will be loaded. Normally this should match PAGE_OFFSET
886 however there are times (like kdump) that one might not want them
887 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000888
889 Say N here unless you know what you are doing.
890
891config KERNEL_START
892 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000893 default PAGE_OFFSET if PAGE_OFFSET_BOOL
894 default "0xc2000000" if CRASH_DUMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000895 default "0xc0000000"
896
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000897config PHYSICAL_START_BOOL
898 bool "Set physical address where the kernel is loaded"
899 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
900 help
901 This gives the physical address where the kernel is loaded.
902
903 Say N here unless you know what you are doing.
904
905config PHYSICAL_START
906 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
907 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP
908 default "0x00000000"
909
910config PHYSICAL_ALIGN
911 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800912 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000913 help
914 This value puts the alignment restrictions on physical address
915 where kernel is loaded and run from. Kernel is compiled for an
916 address which meets above alignment restriction.
917
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000918config TASK_SIZE_BOOL
919 bool "Set custom user task size"
920 depends on ADVANCED_OPTIONS
921 help
922 This option allows you to set the amount of virtual address space
923 allocated to user tasks. This can be useful in optimizing the
924 virtual memory layout of the system.
925
926 Say N here unless you know what you are doing.
927
928config TASK_SIZE
929 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500930 default "0x80000000" if PPC_PREP || PPC_8xx
931 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000932
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000933config CONSISTENT_SIZE_BOOL
934 bool "Set custom consistent memory pool size"
935 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
936 help
937 This option allows you to set the size of the
938 consistent memory pool. This pool of virtual memory
939 is used to make consistent memory allocations.
940
941config CONSISTENT_SIZE
942 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
943 default "0x00200000" if NOT_COHERENT_CACHE
944
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000945config PIN_TLB
946 bool "Pinned Kernel TLBs (860 ONLY)"
947 depends on ADVANCED_OPTIONS && 8xx
948endmenu
949
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000950if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000951config RELOCATABLE
952 bool "Build a relocatable kernel"
953 help
954 This builds a kernel image that is capable of running anywhere
955 in the RMA (real memory area) at any 16k-aligned base address.
956 The kernel is linked as a position-independent executable (PIE)
957 and contains dynamic relocations which are processed early
958 in the bootup process.
959
960 One use is for the kexec on panic case where the recovery kernel
961 must live at a different physical address than the primary
962 kernel.
963
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000964config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000965 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000966 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000967config KERNEL_START
968 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000969 default "0xc000000000000000"
970config PHYSICAL_START
971 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000972 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000973endif
974
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000975source "net/Kconfig"
976
977source "drivers/Kconfig"
978
979source "fs/Kconfig"
980
Li Yang98658532006-10-03 23:10:46 -0500981source "arch/powerpc/sysdev/qe_lib/Kconfig"
982
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000983source "lib/Kconfig"
984
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000985source "arch/powerpc/Kconfig.debug"
986
987source "security/Kconfig"
988
989config KEYS_COMPAT
990 bool
991 depends on COMPAT && KEYS
992 default y
993
994source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000995
996config PPC_CLOCK
997 bool
998 default n
David Brownell9483a572008-07-23 21:26:48 -0700999 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +10001000
1001config PPC_LIB_RHEAP
1002 bool
1003
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -05001004source "arch/powerpc/kvm/Kconfig"