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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_VSYSCALL
27 def_bool y
28
Tony Breedsd831d0b2007-09-21 13:26:03 +100029config GENERIC_CLOCKEVENTS
30 def_bool y
31
Paul Mackerras14cf11a2005-09-26 16:04:21 +100032config GENERIC_HARDIRQS
33 bool
34 default y
35
Michael Ellerman8e27f4d2009-04-22 15:31:45 +000036config GENERIC_HARDIRQS_NO__DO_IRQ
37 bool
38 default y
39
Tejun Heoc2a7e812009-08-14 15:00:53 +090040config HAVE_SETUP_PER_CPU_AREA
Tejun Heoe74e3962009-03-30 19:07:44 +090041 def_bool PPC64
42
Tejun Heoc2a7e812009-08-14 15:00:53 +090043config NEED_PER_CPU_EMBED_FIRST_CHUNK
travis@sgi.comb32ef632008-01-30 13:32:51 +010044 def_bool PPC64
45
Ingo Molnar0d7012a2006-06-29 02:24:43 -070046config IRQ_PER_CPU
47 bool
48 default y
49
Michael Ellerman551b81f2009-10-13 19:44:44 +000050config NR_IRQS
51 int "Number of virtual interrupt numbers"
Anton Blanchard859aefc2010-01-31 01:14:03 +000052 range 32 32768
Michael Ellerman551b81f2009-10-13 19:44:44 +000053 default "512"
54 help
55 This defines the number of virtual interrupt numbers the kernel
56 can manage. Virtual interrupt numbers are what you see in
57 /proc/interrupts. If you configure your system to have too few,
58 drivers will fail to load or worse - handle with care.
59
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100060config STACKTRACE_SUPPORT
61 bool
62 default y
63
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100064config HAVE_LATENCYTOP_SUPPORT
65 def_bool y
66
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100067config TRACE_IRQFLAGS_SUPPORT
68 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100069 default y
70
71config LOCKDEP_SUPPORT
72 bool
73 default y
74
Paul Mackerras14cf11a2005-09-26 16:04:21 +100075config RWSEM_GENERIC_SPINLOCK
76 bool
77
78config RWSEM_XCHGADD_ALGORITHM
79 bool
80 default y
81
Nick Piggin95c354f2008-01-30 13:31:20 +010082config GENERIC_LOCKBREAK
83 bool
84 default y
85 depends on SMP && PREEMPT
86
David Howellsf0d1b0b2006-12-08 02:37:49 -080087config ARCH_HAS_ILOG2_U32
88 bool
David Howellsef55d532006-12-08 02:37:53 -080089 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080090
91config ARCH_HAS_ILOG2_U64
92 bool
David Howellsef55d532006-12-08 02:37:53 -080093 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080094
Akinobu Mitae779b2f2006-03-26 01:39:33 -080095config GENERIC_HWEIGHT
96 bool
97 default y
98
Jon Mason0a9cb462006-05-19 15:35:32 -050099config GENERIC_FIND_NEXT_BIT
100 bool
101 default y
102
Anton Vorontsovb7ce3412008-04-11 23:06:36 +1000103config GENERIC_GPIO
104 bool
105 help
106 Generic GPIO API support
107
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700108config ARCH_NO_VIRT_TO_BUS
109 def_bool PPC64
110
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000111config PPC
112 bool
113 default y
Stephen Rothwell10f85f42010-06-29 12:43:34 +1000114 select OF
115 select OF_FLATTREE
Steven Rostedt2b79d692009-01-06 18:49:17 +0000116 select HAVE_FTRACE_MCOUNT_RECORD
117 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400118 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500119 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700120 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100121 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700122 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700123 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500124 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500125 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800126 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000127 select HAVE_ARCH_TRACEHOOK
Yinghai Lu95f72d12010-07-12 14:36:09 +1000128 select HAVE_MEMBLOCK
FUJITA Tomonori46bab4e2009-08-04 19:08:26 +0000129 select HAVE_DMA_ATTRS
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000130 select HAVE_DMA_API_DEBUG
Jens Axboeb7d7a242008-06-26 11:22:13 +0200131 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400132 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100133 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000134 select GENERIC_ATOMIC64 if PPC32
Peter Zijlstrae360adb2010-10-14 14:01:34 +0800135 select HAVE_IRQ_WORK
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
K.Prasad5aae8a52010-06-15 11:35:19 +0530138 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000139
140config EARLY_PRINTK
141 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100142 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000143
144config COMPAT
145 bool
146 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800147 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000148
149config SYSVIPC_COMPAT
150 bool
151 depends on COMPAT && SYSVIPC
152 default y
153
154# All PPC32s use generic nvram driver through ppc_md
155config GENERIC_NVRAM
156 bool
157 default y if PPC32
158
Ingo Molnarae1e9132008-11-11 09:05:16 +0100159config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000160 bool
161 default y
162
163config ARCH_MAY_HAVE_PC_FDC
164 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100165 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000166
Kumar Gala08264cb2006-01-10 21:43:56 -0600167config PPC_OF
168 def_bool y
169
170config PPC_UDBG_16550
171 bool
172 default n
173
Kumar Gala08264cb2006-01-10 21:43:56 -0600174config GENERIC_TBSYNC
175 bool
176 default y if PPC32 && SMP
177 default n
178
Al Viroe65e1fc2006-09-12 03:04:40 -0400179config AUDIT_ARCH
180 bool
181 default y
182
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800183config GENERIC_BUG
184 bool
185 default y
186 depends on BUG
187
Johannes Bergb3028872007-03-20 05:18:02 +1100188config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500189 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100190 bool
191
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600192config DEFAULT_UIMAGE
193 bool
194 help
195 Used to allow a board to specify it wants a uImage built by default
196 default n
197
Scott Woodb09c1642008-01-17 16:31:40 -0600198config REDBOOT
199 bool
200
Johannes Berg801e4062007-12-08 02:12:39 +0100201config ARCH_HIBERNATION_POSSIBLE
202 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000203 default y
204
Johannes Bergf4cb5702007-12-08 02:14:00 +0100205config ARCH_SUSPEND_POSSIBLE
206 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400207 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
Brian King32d8ad42010-07-07 12:31:02 +0000208 PPC_85xx || PPC_86xx || PPC_PSERIES
Johannes Bergf4cb5702007-12-08 02:14:00 +0100209
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100210config PPC_DCR_NATIVE
211 bool
212 default n
213
214config PPC_DCR_MMIO
215 bool
216 default n
217
218config PPC_DCR
219 bool
220 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
221 default y
222
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100223config PPC_OF_PLATFORM_PCI
224 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100225 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100226 depends on PPC64 # not supported on 32 bits yet
227 default n
228
Akinobu Mita6a11f752009-03-31 15:23:17 -0700229config ARCH_SUPPORTS_DEBUG_PAGEALLOC
230 def_bool y
231
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000232config PPC_ADV_DEBUG_REGS
233 bool
234 depends on 40x || BOOKE
235 default y
236
237config PPC_ADV_DEBUG_IACS
238 int
239 depends on PPC_ADV_DEBUG_REGS
240 default 4 if 44x
241 default 2
242
243config PPC_ADV_DEBUG_DACS
244 int
245 depends on PPC_ADV_DEBUG_REGS
246 default 2
247
248config PPC_ADV_DEBUG_DVCS
249 int
250 depends on PPC_ADV_DEBUG_REGS
251 default 2 if 44x
252 default 0
253
254config PPC_ADV_DEBUG_DAC_RANGE
255 bool
256 depends on PPC_ADV_DEBUG_REGS && 44x
257 default y
258
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000259source "init/Kconfig"
260
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700261source "kernel/Kconfig.freezer"
262
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100263source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500264source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000265
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000266menu "Kernel options"
267
268config HIGHMEM
269 bool "High memory support"
270 depends on PPC32
271
Tony Breeds1ad74992007-09-21 13:26:03 +1000272source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000273source kernel/Kconfig.hz
274source kernel/Kconfig.preempt
275source "fs/Kconfig.binfmt"
276
Mel Gormanba72cb82007-11-28 16:21:13 -0800277config HUGETLB_PAGE_SIZE_VARIABLE
278 bool
279 depends on HUGETLB_PAGE
280 default y
281
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000282config MATH_EMULATION
283 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600284 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000285 ---help---
286 Some PowerPC chips designed for embedded applications do not have
287 a floating-point unit and therefore do not implement the
288 floating-point instructions in the PowerPC instruction set. If you
289 say Y here, the kernel will include code to emulate a floating-point
290 unit, which will allow programs that use floating-point
291 instructions to run.
292
Scott Wood5dd57a12007-09-18 15:29:35 -0500293config 8XX_MINIMAL_FPEMU
294 bool "Minimal math emulation for 8xx"
295 depends on 8xx && !MATH_EMULATION
296 help
297 Older arch/ppc kernels still emulated a few floating point
298 instructions such as load and store, even when full math
299 emulation is disabled. Say "Y" here if you want to preserve
300 this behavior.
301
302 It is recommended that you build a soft-float userspace instead.
303
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800304config IOMMU_HELPER
305 def_bool PPC64
306
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000307config SWIOTLB
308 bool "SWIOTLB support"
309 default n
310 select IOMMU_HELPER
311 ---help---
312 Support for IO bounce buffering for systems without an IOMMU.
313 This allows us to DMA to the full physical address space on
314 platforms where the size of a physical address is larger
315 than the bus address. Not all platforms support this.
316
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000317config HOTPLUG_CPU
318 bool "Support for enabling/disabling CPUs"
319 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
320 ---help---
321 Say Y here to be able to disable and re-enable individual
322 CPUs at runtime on SMP machines.
323
324 Say N if you are unsure.
325
Nathan Fontenot12633e82009-11-25 17:23:25 +0000326config ARCH_CPU_PROBE_RELEASE
327 def_bool y
328 depends on HOTPLUG_CPU
329
Yasunori Gotocc576372006-06-29 02:24:27 -0700330config ARCH_ENABLE_MEMORY_HOTPLUG
331 def_bool y
332
Badari Pulavartya99824f2008-02-05 00:10:18 -0800333config ARCH_HAS_WALK_MEMORY
334 def_bool y
335
Badari Pulavarty14824712008-02-05 00:10:17 -0800336config ARCH_ENABLE_MEMORY_HOTREMOVE
337 def_bool y
338
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000339config KEXEC
340 bool "kexec system call (EXPERIMENTAL)"
Matthew McClintockf933a412010-07-21 16:14:53 -0500341 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000342 help
343 kexec is a system call that implements the ability to shutdown your
344 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400345 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000346 you can start any kernel with it, not just Linux.
347
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400348 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000349
350 It is an ongoing process to be certain the hardware in a machine
351 is properly shutdown, so do not be surprised if this code does not
352 initially work for you. It may help to enable device hotplugging
353 support. As of this writing the exact hardware interface is
354 strongly in flux, so no good recommendation can be made.
355
Haren Mynenie8625d462006-01-14 13:48:25 -0800356config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000357 bool "Build a kdump crash kernel"
Matthew McClintockf933a412010-07-21 16:14:53 -0500358 depends on PPC64 || 6xx || FSL_BOOKE
359 select RELOCATABLE if PPC64 || FSL_BOOKE
Haren Mynenie8625d462006-01-14 13:48:25 -0800360 help
361 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000362 The same kernel binary can be used as production kernel and dump
363 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800364
Manish Ahuja242f2712008-03-22 10:50:50 +1100365config PHYP_DUMP
366 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
367 depends on PPC_PSERIES && EXPERIMENTAL
368 help
369 Hypervisor-assisted dump is meant to be a kdump replacement
370 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100371 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100372
373 If unsure, say "N"
374
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000375config PPCBUG_NVRAM
376 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
377 default y if PPC_PREP
378
379config IRQ_ALL_CPUS
380 bool "Distribute interrupts on all CPUs by default"
381 depends on SMP && !MV64360
382 help
383 This option gives the kernel permission to distribute IRQs across
384 multiple CPUs. Saying N here will route all IRQs to the first
385 CPU. Generally saying Y is safe, although some problems have been
386 reported with SMP Power Macintoshes with this option enabled.
387
Michael Ellermancd015702009-10-13 19:45:03 +0000388config SPARSE_IRQ
389 bool "Support sparse irq numbering"
Yang Li9ce91682010-06-28 23:32:57 +0000390 default n
Michael Ellermancd015702009-10-13 19:45:03 +0000391 help
392 This enables support for sparse irqs. This is useful for distro
393 kernels that want to define a high CONFIG_NR_CPUS value but still
394 want to have low kernel memory footprint on smaller machines.
395
396 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
397 out the irq_desc[] array in a more NUMA-friendly way. )
398
Yang Li9ce91682010-06-28 23:32:57 +0000399 If you don't know what to do here, say N.
Michael Ellermancd015702009-10-13 19:45:03 +0000400
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700401config NUMA
402 bool "NUMA support"
403 depends on PPC64
404 default y if SMP && PPC_PSERIES
405
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700406config NODES_SHIFT
407 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000408 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700409 default "4"
410 depends on NEED_MULTIPLE_NODES
411
Anton Blanchardea55bf22009-09-21 19:56:43 +0000412config MAX_ACTIVE_REGIONS
413 int
414 default "256" if PPC64
415 default "32"
416
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000417config ARCH_SELECT_MEMORY_MODEL
418 def_bool y
419 depends on PPC64
420
421config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000422 def_bool y
423 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000424
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000425config ARCH_SPARSEMEM_ENABLE
426 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000427 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700428 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100429
430config ARCH_SPARSEMEM_DEFAULT
431 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100432 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000433
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700434config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000435 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700436
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100437config SYS_SUPPORTS_HUGETLBFS
438 def_bool y
439 depends on PPC_BOOK3S_64
440
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700441source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000442
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800443config ARCH_MEMORY_PROBE
444 def_bool y
445 depends on MEMORY_HOTPLUG
446
Andy Whitcroft75167952006-10-21 10:24:14 -0700447# Some NUMA nodes have memory ranges that span
448# other nodes. Even though a pfn is valid and
449# between a node's start and end pfns, it may not
450# reside on that node. See memmap_init_zone()
451# for details.
452config NODES_SPAN_OTHER_NODES
453 def_bool y
454 depends on NEED_MULTIPLE_NODES
455
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000456config PPC_HAS_HASH_64K
457 bool
458 depends on PPC64
459 default n
460
Yuri Tikhonove1240122009-01-29 01:40:44 +0000461config STDBINUTILS
462 bool "Using standard binutils settings"
463 depends on 44x
464 default y
465 help
466 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
467 Note, that kernel will be able to run only those applications,
468 which had been compiled using binutils later than 2.17.50.0.3 with
469 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
470 the older binutils, you can patch them with a trivial patch, which
471 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
472
Ilya Yanokca9153a2008-12-11 04:55:41 +0300473choice
474 prompt "Page size"
475 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100476 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300477 Select the kernel logical page size. Increasing the page size
478 will reduce software overhead at each page boundary, allow
479 hardware prefetch mechanisms to be more effective, and allow
480 larger dma transfers increasing IO efficiency and reducing
481 overhead. However the utilization of memory will increase.
482 For example, each cached file will using a multiple of the
483 page size to hold its contents and the difference between the
484 end of file and the end of page is wasted.
485
486 Some dedicated systems, such as software raid serving with
487 accelerated calculations, have shown significant increases.
488
489 If you configure a 64 bit kernel for 64k pages but the
490 processor does not support them, then the kernel will simulate
491 them with 4k pages, loading them on demand, but with the
492 reduced software overhead and larger internal fragmentation.
493 For the 32 bit kernel, a large page option will not be offered
494 unless it is supported by the configured processor.
495
496 If unsure, choose 4K_PAGES.
497
498config PPC_4K_PAGES
499 bool "4k page size"
500
501config PPC_16K_PAGES
502 bool "16k page size" if 44x
503
504config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000505 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300506 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
507
Yuri Tikhonove1240122009-01-29 01:40:44 +0000508config PPC_256K_PAGES
509 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000510 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000511 help
512 Make the page size 256k.
513
514 As the ELF standard only requires alignment to support page
515 sizes up to 64k, you will need to compile all of your user
516 space applications with a non-standard binutils settings
517 (see the STDBINUTILS description for details).
518
519 Say N unless you know what you are doing.
520
Ilya Yanokca9153a2008-12-11 04:55:41 +0300521endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100522
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000523config FORCE_MAX_ZONEORDER
524 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000525 range 9 64 if PPC64 && PPC_64K_PAGES
526 default "9" if PPC64 && PPC_64K_PAGES
527 range 13 64 if PPC64 && !PPC_64K_PAGES
528 default "13" if PPC64 && !PPC_64K_PAGES
529 range 9 64 if PPC32 && PPC_16K_PAGES
530 default "9" if PPC32 && PPC_16K_PAGES
531 range 7 64 if PPC32 && PPC_64K_PAGES
532 default "7" if PPC32 && PPC_64K_PAGES
533 range 5 64 if PPC32 && PPC_256K_PAGES
534 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000535 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000536 default "11"
537 help
538 The kernel memory allocator divides physically contiguous memory
539 blocks into "zones", where each zone is a power of two number of
540 pages. This option selects the largest power of two that the kernel
541 keeps in the memory allocator. If you need to allocate very large
542 blocks of physically contiguous memory, then you may need to
543 increase this value.
544
545 This config option is actually maximum order plus one. For example,
546 a value of 11 means that the largest free memory block is 2^10 pages.
547
548 The page size is not necessarily 4KB. For example, on 64-bit
549 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
550 this in mind when choosing a value for this option.
551
Paul Mackerrasfa282372008-01-24 08:35:13 +1100552config PPC_SUBPAGE_PROT
553 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300554 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100555 help
556 This option adds support for a system call to allow user programs
557 to set access permissions (read/write, readonly, or no access)
558 on the 4k subpages of each 64k page.
559
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000560config SCHED_SMT
561 bool "SMT (Hyperthreading) scheduler support"
562 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000563 help
564 SMT scheduler support improves the CPU scheduler's decision making
565 when dealing with POWER5 cpus at a cost of slightly increased
566 overhead in some places. If unsure say N here.
567
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000568config CMDLINE_BOOL
569 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000570
571config CMDLINE
572 string "Initial kernel command string"
573 depends on CMDLINE_BOOL
574 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
575 help
576 On some platforms, there is currently no way for the boot loader to
577 pass arguments to the kernel. For these platforms, you can supply
578 some command-line options at build time by entering them here. In
579 most cases you will need to specify the root device here.
580
Grant Likelyc356aa42008-07-09 09:41:52 -0600581config EXTRA_TARGETS
582 string "Additional default image types"
583 help
584 List additional targets to be built by the bootwrapper here (separated
585 by spaces). This is useful for targets that depend of device tree
586 files in the .dts directory.
587
588 Targets in this list will be build as part of the default build
589 target, or when the user does a 'make zImage' or a
590 'make zImage.initrd'.
591
592 If unsure, leave blank
593
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000594if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500595config ARCH_WANTS_FREEZER_CONTROL
596 def_bool y
597 depends on ADB_PMU
598
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000599source kernel/power/Kconfig
600endif
601
602config SECCOMP
603 bool "Enable seccomp to safely compute untrusted bytecode"
604 depends on PROC_FS
605 default y
606 help
607 This kernel feature is useful for number crunching applications
608 that may need to compute untrusted bytecode during their
609 execution. By using pipes or other transports made available to
610 the process as file descriptors supporting the read/write
611 syscalls, it's possible to isolate those applications in
612 their own address space using seccomp. Once seccomp is
613 enabled via /proc/<pid>/seccomp, it cannot be disabled
614 and the task is only allowed to execute a few safe syscalls
615 defined by each seccomp mode.
616
617 If unsure, say Y. Only embedded should say N here.
618
619endmenu
620
621config ISA_DMA_API
622 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100623 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000624
625menu "Bus options"
626
627config ISA
628 bool "Support for ISA-bus hardware"
629 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000630 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000631 help
632 Find out whether you have ISA slots on your motherboard. ISA is the
633 name of a bus system, i.e. the way the CPU talks to the other stuff
634 inside your box. If you have an Apple machine, say N here; if you
635 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
636 you have an embedded board, consult your board documentation.
637
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800638config ZONE_DMA
639 bool
640 default y
641
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800642config NEED_DMA_MAP_STATE
643 def_bool (PPC64 || NOT_COHERENT_CACHE)
644
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700645config NEED_SG_DMA_LENGTH
646 def_bool y
647
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000648config GENERIC_ISA_DMA
649 bool
Anton Vorontsov19274452010-07-15 07:38:16 +0000650 depends on ISA_DMA_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000651 default y
652
Paul Mackerras25635c72005-10-26 16:36:55 +1000653config PPC_INDIRECT_PCI
654 bool
655 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600656 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000657 default n
658
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000659config EISA
660 bool
661
662config SBUS
663 bool
664
Kumar Gala08264cb2006-01-10 21:43:56 -0600665config FSL_SOC
666 bool
667
Roy Zang55c44992007-07-10 18:44:34 +0800668config FSL_PCI
669 bool
670 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600671 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800672
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400673config FSL_PMC
674 bool
675 default y
676 depends on SUSPEND && (PPC_85xx || PPC_86xx)
677 help
678 Freescale MPC85xx/MPC86xx power management controller support
679 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
680
Stefan Roese2a706912008-03-26 22:39:50 +1100681config 4xx_SOC
682 bool
683
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400684config FSL_LBC
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800685 bool "Freescale Local Bus support"
686 depends on FSL_SOC
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400687 help
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800688 Enables reporting of errors from the Freescale local bus
689 controller. Also contains some common code used by
690 drivers for specific local bus peripherals.
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400691
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400692config FSL_GTM
693 bool
694 depends on PPC_83xx || QUICC_ENGINE || CPM2
695 help
696 Freescale General-purpose Timers support
697
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000698# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
699config MCA
700 bool
701
John Rigbyb5005632008-06-26 11:07:56 -0600702# Platforms that what PCI turned unconditionally just do select PCI
703# in their config node. Platforms that want to choose at config
704# time should select PPC_PCI_CHOICE
705config PPC_PCI_CHOICE
706 bool
707
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000708config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600709 bool "PCI support" if PPC_PCI_CHOICE
710 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000711 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
David Gibsonf21f49e2007-06-13 14:52:54 +1000712 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000713 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000714 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000715 help
716 Find out whether your system includes a PCI bus. PCI is the name of
717 a bus system, i.e. the way the CPU talks to the other stuff inside
718 your box. If you say Y here, the kernel will include drivers and
719 infrastructure code to support PCI bus devices.
720
721config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600722 def_bool PCI
723
724config PCI_SYSCALL
725 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000726
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000727config PCI_QSPAN
728 bool "QSpan PCI"
729 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000730 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000731 help
732 Say Y here if you have a system based on a Motorola 8xx-series
733 embedded processor with a QSPAN PCI interface, otherwise say N.
734
735config PCI_8260
736 bool
737 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000738 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000739 default y
740
741config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700742 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500743 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000744 default y
745
746choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700747 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000748 depends on 8260_PCI9
749
750config 8260_PCI9_IDMA1
751 bool "IDMA1"
752
753config 8260_PCI9_IDMA2
754 bool "IDMA2"
755
756config 8260_PCI9_IDMA3
757 bool "IDMA3"
758
759config 8260_PCI9_IDMA4
760 bool "IDMA4"
761
762endchoice
763
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500764source "drivers/pci/pcie/Kconfig"
765
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000766source "drivers/pci/Kconfig"
767
768source "drivers/pcmcia/Kconfig"
769
770source "drivers/pci/hotplug/Kconfig"
771
Zhang Weif1f389d2008-04-18 13:33:39 -0700772config HAS_RAPIDIO
773 bool
774 default n
775
776config RAPIDIO
777 bool "RapidIO support"
778 depends on HAS_RAPIDIO
779 help
780 If you say Y here, the kernel will include drivers and
781 infrastructure code to support RapidIO interconnect devices.
782
783source "drivers/rapidio/Kconfig"
784
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000785endmenu
786
787menu "Advanced setup"
788 depends on PPC32
789
790config ADVANCED_OPTIONS
791 bool "Prompt for advanced kernel configuration options"
792 help
793 This option will enable prompting for a variety of advanced kernel
794 configuration options. These options can cause the kernel to not
795 work if they are set incorrectly, but can be used to optimize certain
796 aspects of kernel memory management.
797
798 Unless you know what you are doing, say N here.
799
800comment "Default settings for advanced configuration options are used"
801 depends on !ADVANCED_OPTIONS
802
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000803config LOWMEM_SIZE_BOOL
804 bool "Set maximum low memory"
805 depends on ADVANCED_OPTIONS
806 help
807 This option allows you to set the maximum amount of memory which
808 will be used as "low memory", that is, memory which the kernel can
809 access directly, without having to set up a kernel virtual mapping.
810 This can be useful in optimizing the layout of kernel virtual
811 memory.
812
813 Say N here unless you know what you are doing.
814
815config LOWMEM_SIZE
816 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
817 default "0x30000000"
818
Trent Piepho96051462008-12-08 19:34:58 -0800819config LOWMEM_CAM_NUM_BOOL
820 bool "Set number of CAMs to use to map low memory"
821 depends on ADVANCED_OPTIONS && FSL_BOOKE
822 help
823 This option allows you to set the maximum number of CAM slots that
824 will be used to map low memory. There are a limited number of slots
825 available and even more limited number that will fit in the L1 MMU.
826 However, using more entries will allow mapping more low memory. This
827 can be useful in optimizing the layout of kernel virtual memory.
828
829 Say N here unless you know what you are doing.
830
831config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400832 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800833 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
834 default 3
835
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000836config RELOCATABLE
837 bool "Build a relocatable kernel (EXPERIMENTAL)"
838 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
839 help
840 This builds a kernel image that is capable of running at the
841 location the kernel is loaded at (some alignment restrictions may
842 exist).
843
844 One use is for the kexec on panic case where the recovery kernel
845 must live at a different physical address than the primary
846 kernel.
847
848 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
849 it has been loaded at and the compile time physical addresses
850 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
851 setting can still be useful to bootwrappers that need to know the
852 load location of the kernel (eg. u-boot/mkimage).
853
854config PAGE_OFFSET_BOOL
855 bool "Set custom page offset address"
856 depends on ADVANCED_OPTIONS
857 help
858 This option allows you to set the kernel virtual address at which
859 the kernel will map low memory. This can be useful in optimizing
860 the virtual memory layout of the system.
861
862 Say N here unless you know what you are doing.
863
864config PAGE_OFFSET
865 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
866 default "0xc0000000"
867
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000868config KERNEL_START_BOOL
869 bool "Set custom kernel base address"
870 depends on ADVANCED_OPTIONS
871 help
872 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000873 the kernel will be loaded. Normally this should match PAGE_OFFSET
874 however there are times (like kdump) that one might not want them
875 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000876
877 Say N here unless you know what you are doing.
878
879config KERNEL_START
880 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000881 default PAGE_OFFSET if PAGE_OFFSET_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500882 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000883 default "0xc0000000"
884
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000885config PHYSICAL_START_BOOL
886 bool "Set physical address where the kernel is loaded"
887 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
888 help
889 This gives the physical address where the kernel is loaded.
890
891 Say N here unless you know what you are doing.
892
893config PHYSICAL_START
894 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500895 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000896 default "0x00000000"
897
898config PHYSICAL_ALIGN
899 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800900 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000901 help
902 This value puts the alignment restrictions on physical address
903 where kernel is loaded and run from. Kernel is compiled for an
904 address which meets above alignment restriction.
905
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000906config TASK_SIZE_BOOL
907 bool "Set custom user task size"
908 depends on ADVANCED_OPTIONS
909 help
910 This option allows you to set the amount of virtual address space
911 allocated to user tasks. This can be useful in optimizing the
912 virtual memory layout of the system.
913
914 Say N here unless you know what you are doing.
915
916config TASK_SIZE
917 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500918 default "0x80000000" if PPC_PREP || PPC_8xx
919 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000920
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000921config CONSISTENT_SIZE_BOOL
922 bool "Set custom consistent memory pool size"
923 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
924 help
925 This option allows you to set the size of the
926 consistent memory pool. This pool of virtual memory
927 is used to make consistent memory allocations.
928
929config CONSISTENT_SIZE
930 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
931 default "0x00200000" if NOT_COHERENT_CACHE
932
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000933config PIN_TLB
934 bool "Pinned Kernel TLBs (860 ONLY)"
935 depends on ADVANCED_OPTIONS && 8xx
936endmenu
937
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000938if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000939config RELOCATABLE
940 bool "Build a relocatable kernel"
941 help
942 This builds a kernel image that is capable of running anywhere
943 in the RMA (real memory area) at any 16k-aligned base address.
944 The kernel is linked as a position-independent executable (PIE)
945 and contains dynamic relocations which are processed early
946 in the bootup process.
947
948 One use is for the kexec on panic case where the recovery kernel
949 must live at a different physical address than the primary
950 kernel.
951
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000952config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000953 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000954 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000955config KERNEL_START
956 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000957 default "0xc000000000000000"
958config PHYSICAL_START
959 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000960 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000961endif
962
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000963source "net/Kconfig"
964
965source "drivers/Kconfig"
966
967source "fs/Kconfig"
968
Li Yang98658532006-10-03 23:10:46 -0500969source "arch/powerpc/sysdev/qe_lib/Kconfig"
970
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000971source "lib/Kconfig"
972
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000973source "arch/powerpc/Kconfig.debug"
974
975source "security/Kconfig"
976
977config KEYS_COMPAT
978 bool
979 depends on COMPAT && KEYS
980 default y
981
982source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000983
984config PPC_CLOCK
985 bool
986 default n
David Brownell9483a572008-07-23 21:26:48 -0700987 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000988
989config PPC_LIB_RHEAP
990 bool
991
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500992source "arch/powerpc/kvm/Kconfig"