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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_VSYSCALL
33 def_bool y
34
Tony Breedsd831d0b2007-09-21 13:26:03 +100035config GENERIC_CLOCKEVENTS
36 def_bool y
37
Paul Mackerras14cf11a2005-09-26 16:04:21 +100038config GENERIC_HARDIRQS
39 bool
40 default y
41
Michael Ellerman8e27f4d2009-04-22 15:31:45 +000042config GENERIC_HARDIRQS_NO__DO_IRQ
43 bool
44 default y
45
Tejun Heoc2a7e812009-08-14 15:00:53 +090046config HAVE_SETUP_PER_CPU_AREA
Tejun Heoe74e3962009-03-30 19:07:44 +090047 def_bool PPC64
48
Tejun Heoc2a7e812009-08-14 15:00:53 +090049config NEED_PER_CPU_EMBED_FIRST_CHUNK
travis@sgi.comb32ef632008-01-30 13:32:51 +010050 def_bool PPC64
51
Ingo Molnar0d7012a2006-06-29 02:24:43 -070052config IRQ_PER_CPU
53 bool
54 default y
55
Michael Ellerman551b81f2009-10-13 19:44:44 +000056config NR_IRQS
57 int "Number of virtual interrupt numbers"
Anton Blanchard859aefc2010-01-31 01:14:03 +000058 range 32 32768
Michael Ellerman551b81f2009-10-13 19:44:44 +000059 default "512"
60 help
61 This defines the number of virtual interrupt numbers the kernel
62 can manage. Virtual interrupt numbers are what you see in
63 /proc/interrupts. If you configure your system to have too few,
64 drivers will fail to load or worse - handle with care.
65
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100066config STACKTRACE_SUPPORT
67 bool
68 default y
69
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100070config HAVE_LATENCYTOP_SUPPORT
71 def_bool y
72
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100073config TRACE_IRQFLAGS_SUPPORT
74 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100075 default y
76
77config LOCKDEP_SUPPORT
78 bool
79 default y
80
Paul Mackerras14cf11a2005-09-26 16:04:21 +100081config RWSEM_GENERIC_SPINLOCK
82 bool
83
84config RWSEM_XCHGADD_ALGORITHM
85 bool
86 default y
87
Nick Piggin95c354f2008-01-30 13:31:20 +010088config GENERIC_LOCKBREAK
89 bool
90 default y
91 depends on SMP && PREEMPT
92
David Howellsf0d1b0b2006-12-08 02:37:49 -080093config ARCH_HAS_ILOG2_U32
94 bool
David Howellsef55d532006-12-08 02:37:53 -080095 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080096
97config ARCH_HAS_ILOG2_U64
98 bool
David Howellsef55d532006-12-08 02:37:53 -080099 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -0800100
Akinobu Mitae779b2f2006-03-26 01:39:33 -0800101config GENERIC_HWEIGHT
102 bool
103 default y
104
Jon Mason0a9cb462006-05-19 15:35:32 -0500105config GENERIC_FIND_NEXT_BIT
106 bool
107 default y
108
Anton Vorontsovb7ce3412008-04-11 23:06:36 +1000109config GENERIC_GPIO
110 bool
111 help
112 Generic GPIO API support
113
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700114config ARCH_NO_VIRT_TO_BUS
115 def_bool PPC64
116
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000117config PPC
118 bool
119 default y
Stephen Rothwell10f85f42010-06-29 12:43:34 +1000120 select OF
121 select OF_FLATTREE
Steven Rostedt2b79d692009-01-06 18:49:17 +0000122 select HAVE_FTRACE_MCOUNT_RECORD
123 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400124 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500125 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700126 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100127 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700128 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700129 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500130 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500131 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800132 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000133 select HAVE_ARCH_TRACEHOOK
Yinghai Lu95f72d12010-07-12 14:36:09 +1000134 select HAVE_MEMBLOCK
FUJITA Tomonori46bab4e2009-08-04 19:08:26 +0000135 select HAVE_DMA_ATTRS
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000136 select HAVE_DMA_API_DEBUG
Jens Axboeb7d7a242008-06-26 11:22:13 +0200137 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400138 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100139 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000140 select GENERIC_ATOMIC64 if PPC32
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200141 select HAVE_PERF_EVENTS
Mahesh Salgaonkar359e4282010-04-07 18:10:20 +1000142 select HAVE_REGS_AND_STACK_ACCESS_API
K.Prasad5aae8a52010-06-15 11:35:19 +0530143 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000144
145config EARLY_PRINTK
146 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100147 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000148
149config COMPAT
150 bool
151 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800152 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000153
154config SYSVIPC_COMPAT
155 bool
156 depends on COMPAT && SYSVIPC
157 default y
158
159# All PPC32s use generic nvram driver through ppc_md
160config GENERIC_NVRAM
161 bool
162 default y if PPC32
163
Ingo Molnarae1e9132008-11-11 09:05:16 +0100164config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000165 bool
166 default y
167
168config ARCH_MAY_HAVE_PC_FDC
169 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100170 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000171
Kumar Gala08264cb2006-01-10 21:43:56 -0600172config PPC_OF
173 def_bool y
174
175config PPC_UDBG_16550
176 bool
177 default n
178
Kumar Gala08264cb2006-01-10 21:43:56 -0600179config GENERIC_TBSYNC
180 bool
181 default y if PPC32 && SMP
182 default n
183
Al Viroe65e1fc2006-09-12 03:04:40 -0400184config AUDIT_ARCH
185 bool
186 default y
187
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800188config GENERIC_BUG
189 bool
190 default y
191 depends on BUG
192
Johannes Bergb3028872007-03-20 05:18:02 +1100193config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500194 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100195 bool
196
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600197config DEFAULT_UIMAGE
198 bool
199 help
200 Used to allow a board to specify it wants a uImage built by default
201 default n
202
Scott Woodb09c1642008-01-17 16:31:40 -0600203config REDBOOT
204 bool
205
Johannes Berg801e4062007-12-08 02:12:39 +0100206config ARCH_HIBERNATION_POSSIBLE
207 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000208 default y
209
Johannes Bergf4cb5702007-12-08 02:14:00 +0100210config ARCH_SUSPEND_POSSIBLE
211 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400212 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
Brian King32d8ad42010-07-07 12:31:02 +0000213 PPC_85xx || PPC_86xx || PPC_PSERIES
Johannes Bergf4cb5702007-12-08 02:14:00 +0100214
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100215config PPC_DCR_NATIVE
216 bool
217 default n
218
219config PPC_DCR_MMIO
220 bool
221 default n
222
223config PPC_DCR
224 bool
225 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
226 default y
227
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100228config PPC_OF_PLATFORM_PCI
229 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100230 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100231 depends on PPC64 # not supported on 32 bits yet
232 default n
233
Akinobu Mita6a11f752009-03-31 15:23:17 -0700234config ARCH_SUPPORTS_DEBUG_PAGEALLOC
235 def_bool y
236
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000237config PPC_ADV_DEBUG_REGS
238 bool
239 depends on 40x || BOOKE
240 default y
241
242config PPC_ADV_DEBUG_IACS
243 int
244 depends on PPC_ADV_DEBUG_REGS
245 default 4 if 44x
246 default 2
247
248config PPC_ADV_DEBUG_DACS
249 int
250 depends on PPC_ADV_DEBUG_REGS
251 default 2
252
253config PPC_ADV_DEBUG_DVCS
254 int
255 depends on PPC_ADV_DEBUG_REGS
256 default 2 if 44x
257 default 0
258
259config PPC_ADV_DEBUG_DAC_RANGE
260 bool
261 depends on PPC_ADV_DEBUG_REGS && 44x
262 default y
263
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000264source "init/Kconfig"
265
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700266source "kernel/Kconfig.freezer"
267
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100268source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500269source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000270
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000271menu "Kernel options"
272
273config HIGHMEM
274 bool "High memory support"
275 depends on PPC32
276
Tony Breeds1ad74992007-09-21 13:26:03 +1000277source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000278source kernel/Kconfig.hz
279source kernel/Kconfig.preempt
280source "fs/Kconfig.binfmt"
281
Mel Gormanba72cb82007-11-28 16:21:13 -0800282config HUGETLB_PAGE_SIZE_VARIABLE
283 bool
284 depends on HUGETLB_PAGE
285 default y
286
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000287config MATH_EMULATION
288 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600289 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000290 ---help---
291 Some PowerPC chips designed for embedded applications do not have
292 a floating-point unit and therefore do not implement the
293 floating-point instructions in the PowerPC instruction set. If you
294 say Y here, the kernel will include code to emulate a floating-point
295 unit, which will allow programs that use floating-point
296 instructions to run.
297
Scott Wood5dd57a12007-09-18 15:29:35 -0500298config 8XX_MINIMAL_FPEMU
299 bool "Minimal math emulation for 8xx"
300 depends on 8xx && !MATH_EMULATION
301 help
302 Older arch/ppc kernels still emulated a few floating point
303 instructions such as load and store, even when full math
304 emulation is disabled. Say "Y" here if you want to preserve
305 this behavior.
306
307 It is recommended that you build a soft-float userspace instead.
308
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800309config IOMMU_HELPER
310 def_bool PPC64
311
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000312config SWIOTLB
313 bool "SWIOTLB support"
314 default n
315 select IOMMU_HELPER
316 ---help---
317 Support for IO bounce buffering for systems without an IOMMU.
318 This allows us to DMA to the full physical address space on
319 platforms where the size of a physical address is larger
320 than the bus address. Not all platforms support this.
321
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000322config HOTPLUG_CPU
323 bool "Support for enabling/disabling CPUs"
324 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
325 ---help---
326 Say Y here to be able to disable and re-enable individual
327 CPUs at runtime on SMP machines.
328
329 Say N if you are unsure.
330
Nathan Fontenot12633e82009-11-25 17:23:25 +0000331config ARCH_CPU_PROBE_RELEASE
332 def_bool y
333 depends on HOTPLUG_CPU
334
Yasunori Gotocc576372006-06-29 02:24:27 -0700335config ARCH_ENABLE_MEMORY_HOTPLUG
336 def_bool y
337
Badari Pulavartya99824f2008-02-05 00:10:18 -0800338config ARCH_HAS_WALK_MEMORY
339 def_bool y
340
Badari Pulavarty14824712008-02-05 00:10:17 -0800341config ARCH_ENABLE_MEMORY_HOTREMOVE
342 def_bool y
343
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000344config KEXEC
345 bool "kexec system call (EXPERIMENTAL)"
Matthew McClintockf933a412010-07-21 16:14:53 -0500346 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000347 help
348 kexec is a system call that implements the ability to shutdown your
349 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400350 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000351 you can start any kernel with it, not just Linux.
352
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400353 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000354
355 It is an ongoing process to be certain the hardware in a machine
356 is properly shutdown, so do not be surprised if this code does not
357 initially work for you. It may help to enable device hotplugging
358 support. As of this writing the exact hardware interface is
359 strongly in flux, so no good recommendation can be made.
360
Haren Mynenie8625d462006-01-14 13:48:25 -0800361config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000362 bool "Build a kdump crash kernel"
Matthew McClintockf933a412010-07-21 16:14:53 -0500363 depends on PPC64 || 6xx || FSL_BOOKE
364 select RELOCATABLE if PPC64 || FSL_BOOKE
Haren Mynenie8625d462006-01-14 13:48:25 -0800365 help
366 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000367 The same kernel binary can be used as production kernel and dump
368 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800369
Manish Ahuja242f2712008-03-22 10:50:50 +1100370config PHYP_DUMP
371 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
372 depends on PPC_PSERIES && EXPERIMENTAL
373 help
374 Hypervisor-assisted dump is meant to be a kdump replacement
375 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100376 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100377
378 If unsure, say "N"
379
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000380config PPCBUG_NVRAM
381 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
382 default y if PPC_PREP
383
384config IRQ_ALL_CPUS
385 bool "Distribute interrupts on all CPUs by default"
386 depends on SMP && !MV64360
387 help
388 This option gives the kernel permission to distribute IRQs across
389 multiple CPUs. Saying N here will route all IRQs to the first
390 CPU. Generally saying Y is safe, although some problems have been
391 reported with SMP Power Macintoshes with this option enabled.
392
Michael Ellermancd015702009-10-13 19:45:03 +0000393config SPARSE_IRQ
394 bool "Support sparse irq numbering"
Yang Li9ce91682010-06-28 23:32:57 +0000395 default n
Michael Ellermancd015702009-10-13 19:45:03 +0000396 help
397 This enables support for sparse irqs. This is useful for distro
398 kernels that want to define a high CONFIG_NR_CPUS value but still
399 want to have low kernel memory footprint on smaller machines.
400
401 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
402 out the irq_desc[] array in a more NUMA-friendly way. )
403
Yang Li9ce91682010-06-28 23:32:57 +0000404 If you don't know what to do here, say N.
Michael Ellermancd015702009-10-13 19:45:03 +0000405
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700406config NUMA
407 bool "NUMA support"
408 depends on PPC64
409 default y if SMP && PPC_PSERIES
410
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700411config NODES_SHIFT
412 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000413 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700414 default "4"
415 depends on NEED_MULTIPLE_NODES
416
Anton Blanchardea55bf22009-09-21 19:56:43 +0000417config MAX_ACTIVE_REGIONS
418 int
419 default "256" if PPC64
420 default "32"
421
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000422config ARCH_SELECT_MEMORY_MODEL
423 def_bool y
424 depends on PPC64
425
426config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000427 def_bool y
428 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000429
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000430config ARCH_SPARSEMEM_ENABLE
431 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000432 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700433 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100434
435config ARCH_SPARSEMEM_DEFAULT
436 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100437 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000438
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700439config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000440 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700441
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100442config SYS_SUPPORTS_HUGETLBFS
443 def_bool y
444 depends on PPC_BOOK3S_64
445
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700446source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000447
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800448config ARCH_MEMORY_PROBE
449 def_bool y
450 depends on MEMORY_HOTPLUG
451
Andy Whitcroft75167952006-10-21 10:24:14 -0700452# Some NUMA nodes have memory ranges that span
453# other nodes. Even though a pfn is valid and
454# between a node's start and end pfns, it may not
455# reside on that node. See memmap_init_zone()
456# for details.
457config NODES_SPAN_OTHER_NODES
458 def_bool y
459 depends on NEED_MULTIPLE_NODES
460
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000461config PPC_HAS_HASH_64K
462 bool
463 depends on PPC64
464 default n
465
Yuri Tikhonove1240122009-01-29 01:40:44 +0000466config STDBINUTILS
467 bool "Using standard binutils settings"
468 depends on 44x
469 default y
470 help
471 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
472 Note, that kernel will be able to run only those applications,
473 which had been compiled using binutils later than 2.17.50.0.3 with
474 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
475 the older binutils, you can patch them with a trivial patch, which
476 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
477
Ilya Yanokca9153a2008-12-11 04:55:41 +0300478choice
479 prompt "Page size"
480 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100481 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300482 Select the kernel logical page size. Increasing the page size
483 will reduce software overhead at each page boundary, allow
484 hardware prefetch mechanisms to be more effective, and allow
485 larger dma transfers increasing IO efficiency and reducing
486 overhead. However the utilization of memory will increase.
487 For example, each cached file will using a multiple of the
488 page size to hold its contents and the difference between the
489 end of file and the end of page is wasted.
490
491 Some dedicated systems, such as software raid serving with
492 accelerated calculations, have shown significant increases.
493
494 If you configure a 64 bit kernel for 64k pages but the
495 processor does not support them, then the kernel will simulate
496 them with 4k pages, loading them on demand, but with the
497 reduced software overhead and larger internal fragmentation.
498 For the 32 bit kernel, a large page option will not be offered
499 unless it is supported by the configured processor.
500
501 If unsure, choose 4K_PAGES.
502
503config PPC_4K_PAGES
504 bool "4k page size"
505
506config PPC_16K_PAGES
507 bool "16k page size" if 44x
508
509config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000510 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300511 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
512
Yuri Tikhonove1240122009-01-29 01:40:44 +0000513config PPC_256K_PAGES
514 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000515 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000516 help
517 Make the page size 256k.
518
519 As the ELF standard only requires alignment to support page
520 sizes up to 64k, you will need to compile all of your user
521 space applications with a non-standard binutils settings
522 (see the STDBINUTILS description for details).
523
524 Say N unless you know what you are doing.
525
Ilya Yanokca9153a2008-12-11 04:55:41 +0300526endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100527
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000528config FORCE_MAX_ZONEORDER
529 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000530 range 9 64 if PPC64 && PPC_64K_PAGES
531 default "9" if PPC64 && PPC_64K_PAGES
532 range 13 64 if PPC64 && !PPC_64K_PAGES
533 default "13" if PPC64 && !PPC_64K_PAGES
534 range 9 64 if PPC32 && PPC_16K_PAGES
535 default "9" if PPC32 && PPC_16K_PAGES
536 range 7 64 if PPC32 && PPC_64K_PAGES
537 default "7" if PPC32 && PPC_64K_PAGES
538 range 5 64 if PPC32 && PPC_256K_PAGES
539 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000540 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000541 default "11"
542 help
543 The kernel memory allocator divides physically contiguous memory
544 blocks into "zones", where each zone is a power of two number of
545 pages. This option selects the largest power of two that the kernel
546 keeps in the memory allocator. If you need to allocate very large
547 blocks of physically contiguous memory, then you may need to
548 increase this value.
549
550 This config option is actually maximum order plus one. For example,
551 a value of 11 means that the largest free memory block is 2^10 pages.
552
553 The page size is not necessarily 4KB. For example, on 64-bit
554 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
555 this in mind when choosing a value for this option.
556
Paul Mackerrasfa282372008-01-24 08:35:13 +1100557config PPC_SUBPAGE_PROT
558 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300559 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100560 help
561 This option adds support for a system call to allow user programs
562 to set access permissions (read/write, readonly, or no access)
563 on the 4k subpages of each 64k page.
564
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000565config SCHED_SMT
566 bool "SMT (Hyperthreading) scheduler support"
567 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000568 help
569 SMT scheduler support improves the CPU scheduler's decision making
570 when dealing with POWER5 cpus at a cost of slightly increased
571 overhead in some places. If unsure say N here.
572
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000573config CMDLINE_BOOL
574 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000575
576config CMDLINE
577 string "Initial kernel command string"
578 depends on CMDLINE_BOOL
579 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
580 help
581 On some platforms, there is currently no way for the boot loader to
582 pass arguments to the kernel. For these platforms, you can supply
583 some command-line options at build time by entering them here. In
584 most cases you will need to specify the root device here.
585
Grant Likelyc356aa42008-07-09 09:41:52 -0600586config EXTRA_TARGETS
587 string "Additional default image types"
588 help
589 List additional targets to be built by the bootwrapper here (separated
590 by spaces). This is useful for targets that depend of device tree
591 files in the .dts directory.
592
593 Targets in this list will be build as part of the default build
594 target, or when the user does a 'make zImage' or a
595 'make zImage.initrd'.
596
597 If unsure, leave blank
598
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000599if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500600config ARCH_WANTS_FREEZER_CONTROL
601 def_bool y
602 depends on ADB_PMU
603
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000604source kernel/power/Kconfig
605endif
606
607config SECCOMP
608 bool "Enable seccomp to safely compute untrusted bytecode"
609 depends on PROC_FS
610 default y
611 help
612 This kernel feature is useful for number crunching applications
613 that may need to compute untrusted bytecode during their
614 execution. By using pipes or other transports made available to
615 the process as file descriptors supporting the read/write
616 syscalls, it's possible to isolate those applications in
617 their own address space using seccomp. Once seccomp is
618 enabled via /proc/<pid>/seccomp, it cannot be disabled
619 and the task is only allowed to execute a few safe syscalls
620 defined by each seccomp mode.
621
622 If unsure, say Y. Only embedded should say N here.
623
624endmenu
625
626config ISA_DMA_API
627 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100628 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000629
630menu "Bus options"
631
632config ISA
633 bool "Support for ISA-bus hardware"
634 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000635 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000636 help
637 Find out whether you have ISA slots on your motherboard. ISA is the
638 name of a bus system, i.e. the way the CPU talks to the other stuff
639 inside your box. If you have an Apple machine, say N here; if you
640 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
641 you have an embedded board, consult your board documentation.
642
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800643config ZONE_DMA
644 bool
645 default y
646
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800647config NEED_DMA_MAP_STATE
648 def_bool (PPC64 || NOT_COHERENT_CACHE)
649
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700650config NEED_SG_DMA_LENGTH
651 def_bool y
652
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000653config GENERIC_ISA_DMA
654 bool
Anton Vorontsov19274452010-07-15 07:38:16 +0000655 depends on ISA_DMA_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000656 default y
657
Paul Mackerras25635c72005-10-26 16:36:55 +1000658config PPC_INDIRECT_PCI
659 bool
660 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600661 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000662 default n
663
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000664config EISA
665 bool
666
667config SBUS
668 bool
669
Kumar Gala08264cb2006-01-10 21:43:56 -0600670config FSL_SOC
671 bool
672
Roy Zang55c44992007-07-10 18:44:34 +0800673config FSL_PCI
674 bool
675 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600676 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800677
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400678config FSL_PMC
679 bool
680 default y
681 depends on SUSPEND && (PPC_85xx || PPC_86xx)
682 help
683 Freescale MPC85xx/MPC86xx power management controller support
684 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
685
Stefan Roese2a706912008-03-26 22:39:50 +1100686config 4xx_SOC
687 bool
688
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400689config FSL_LBC
690 bool
691 help
692 Freescale Localbus support
693
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400694config FSL_GTM
695 bool
696 depends on PPC_83xx || QUICC_ENGINE || CPM2
697 help
698 Freescale General-purpose Timers support
699
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000700# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
701config MCA
702 bool
703
John Rigbyb5005632008-06-26 11:07:56 -0600704# Platforms that what PCI turned unconditionally just do select PCI
705# in their config node. Platforms that want to choose at config
706# time should select PPC_PCI_CHOICE
707config PPC_PCI_CHOICE
708 bool
709
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000710config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600711 bool "PCI support" if PPC_PCI_CHOICE
712 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000713 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
David Gibsonf21f49e2007-06-13 14:52:54 +1000714 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000715 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000716 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000717 help
718 Find out whether your system includes a PCI bus. PCI is the name of
719 a bus system, i.e. the way the CPU talks to the other stuff inside
720 your box. If you say Y here, the kernel will include drivers and
721 infrastructure code to support PCI bus devices.
722
723config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600724 def_bool PCI
725
726config PCI_SYSCALL
727 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000728
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000729config PCI_QSPAN
730 bool "QSpan PCI"
731 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000732 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000733 help
734 Say Y here if you have a system based on a Motorola 8xx-series
735 embedded processor with a QSPAN PCI interface, otherwise say N.
736
737config PCI_8260
738 bool
739 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000740 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000741 default y
742
743config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700744 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500745 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000746 default y
747
748choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700749 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000750 depends on 8260_PCI9
751
752config 8260_PCI9_IDMA1
753 bool "IDMA1"
754
755config 8260_PCI9_IDMA2
756 bool "IDMA2"
757
758config 8260_PCI9_IDMA3
759 bool "IDMA3"
760
761config 8260_PCI9_IDMA4
762 bool "IDMA4"
763
764endchoice
765
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500766source "drivers/pci/pcie/Kconfig"
767
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000768source "drivers/pci/Kconfig"
769
770source "drivers/pcmcia/Kconfig"
771
772source "drivers/pci/hotplug/Kconfig"
773
Zhang Weif1f389d2008-04-18 13:33:39 -0700774config HAS_RAPIDIO
775 bool
776 default n
777
778config RAPIDIO
779 bool "RapidIO support"
780 depends on HAS_RAPIDIO
781 help
782 If you say Y here, the kernel will include drivers and
783 infrastructure code to support RapidIO interconnect devices.
784
785source "drivers/rapidio/Kconfig"
786
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000787endmenu
788
789menu "Advanced setup"
790 depends on PPC32
791
792config ADVANCED_OPTIONS
793 bool "Prompt for advanced kernel configuration options"
794 help
795 This option will enable prompting for a variety of advanced kernel
796 configuration options. These options can cause the kernel to not
797 work if they are set incorrectly, but can be used to optimize certain
798 aspects of kernel memory management.
799
800 Unless you know what you are doing, say N here.
801
802comment "Default settings for advanced configuration options are used"
803 depends on !ADVANCED_OPTIONS
804
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000805config LOWMEM_SIZE_BOOL
806 bool "Set maximum low memory"
807 depends on ADVANCED_OPTIONS
808 help
809 This option allows you to set the maximum amount of memory which
810 will be used as "low memory", that is, memory which the kernel can
811 access directly, without having to set up a kernel virtual mapping.
812 This can be useful in optimizing the layout of kernel virtual
813 memory.
814
815 Say N here unless you know what you are doing.
816
817config LOWMEM_SIZE
818 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
819 default "0x30000000"
820
Trent Piepho96051462008-12-08 19:34:58 -0800821config LOWMEM_CAM_NUM_BOOL
822 bool "Set number of CAMs to use to map low memory"
823 depends on ADVANCED_OPTIONS && FSL_BOOKE
824 help
825 This option allows you to set the maximum number of CAM slots that
826 will be used to map low memory. There are a limited number of slots
827 available and even more limited number that will fit in the L1 MMU.
828 However, using more entries will allow mapping more low memory. This
829 can be useful in optimizing the layout of kernel virtual memory.
830
831 Say N here unless you know what you are doing.
832
833config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400834 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800835 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
836 default 3
837
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000838config RELOCATABLE
839 bool "Build a relocatable kernel (EXPERIMENTAL)"
840 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
841 help
842 This builds a kernel image that is capable of running at the
843 location the kernel is loaded at (some alignment restrictions may
844 exist).
845
846 One use is for the kexec on panic case where the recovery kernel
847 must live at a different physical address than the primary
848 kernel.
849
850 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
851 it has been loaded at and the compile time physical addresses
852 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
853 setting can still be useful to bootwrappers that need to know the
854 load location of the kernel (eg. u-boot/mkimage).
855
856config PAGE_OFFSET_BOOL
857 bool "Set custom page offset address"
858 depends on ADVANCED_OPTIONS
859 help
860 This option allows you to set the kernel virtual address at which
861 the kernel will map low memory. This can be useful in optimizing
862 the virtual memory layout of the system.
863
864 Say N here unless you know what you are doing.
865
866config PAGE_OFFSET
867 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
868 default "0xc0000000"
869
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000870config KERNEL_START_BOOL
871 bool "Set custom kernel base address"
872 depends on ADVANCED_OPTIONS
873 help
874 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000875 the kernel will be loaded. Normally this should match PAGE_OFFSET
876 however there are times (like kdump) that one might not want them
877 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000878
879 Say N here unless you know what you are doing.
880
881config KERNEL_START
882 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000883 default PAGE_OFFSET if PAGE_OFFSET_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500884 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000885 default "0xc0000000"
886
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000887config PHYSICAL_START_BOOL
888 bool "Set physical address where the kernel is loaded"
889 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
890 help
891 This gives the physical address where the kernel is loaded.
892
893 Say N here unless you know what you are doing.
894
895config PHYSICAL_START
896 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500897 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000898 default "0x00000000"
899
900config PHYSICAL_ALIGN
901 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800902 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000903 help
904 This value puts the alignment restrictions on physical address
905 where kernel is loaded and run from. Kernel is compiled for an
906 address which meets above alignment restriction.
907
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000908config TASK_SIZE_BOOL
909 bool "Set custom user task size"
910 depends on ADVANCED_OPTIONS
911 help
912 This option allows you to set the amount of virtual address space
913 allocated to user tasks. This can be useful in optimizing the
914 virtual memory layout of the system.
915
916 Say N here unless you know what you are doing.
917
918config TASK_SIZE
919 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500920 default "0x80000000" if PPC_PREP || PPC_8xx
921 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000922
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000923config CONSISTENT_SIZE_BOOL
924 bool "Set custom consistent memory pool size"
925 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
926 help
927 This option allows you to set the size of the
928 consistent memory pool. This pool of virtual memory
929 is used to make consistent memory allocations.
930
931config CONSISTENT_SIZE
932 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
933 default "0x00200000" if NOT_COHERENT_CACHE
934
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000935config PIN_TLB
936 bool "Pinned Kernel TLBs (860 ONLY)"
937 depends on ADVANCED_OPTIONS && 8xx
938endmenu
939
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000940if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000941config RELOCATABLE
942 bool "Build a relocatable kernel"
943 help
944 This builds a kernel image that is capable of running anywhere
945 in the RMA (real memory area) at any 16k-aligned base address.
946 The kernel is linked as a position-independent executable (PIE)
947 and contains dynamic relocations which are processed early
948 in the bootup process.
949
950 One use is for the kexec on panic case where the recovery kernel
951 must live at a different physical address than the primary
952 kernel.
953
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000954config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000955 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000956 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000957config KERNEL_START
958 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000959 default "0xc000000000000000"
960config PHYSICAL_START
961 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000962 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000963endif
964
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000965source "net/Kconfig"
966
967source "drivers/Kconfig"
968
969source "fs/Kconfig"
970
Li Yang98658532006-10-03 23:10:46 -0500971source "arch/powerpc/sysdev/qe_lib/Kconfig"
972
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000973source "lib/Kconfig"
974
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000975source "arch/powerpc/Kconfig.debug"
976
977source "security/Kconfig"
978
979config KEYS_COMPAT
980 bool
981 depends on COMPAT && KEYS
982 default y
983
984source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000985
986config PPC_CLOCK
987 bool
988 default n
David Brownell9483a572008-07-23 21:26:48 -0700989 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000990
991config PPC_LIB_RHEAP
992 bool
993
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500994source "arch/powerpc/kvm/Kconfig"