blob: 71ba04721bebadb58132125da79b605c13a09d4f [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
kerstin jonsson234a71a2010-10-22 00:17:55 +00007config 32BIT
8 bool
9 default y if PPC32
10
Paul Mackerras14cf11a2005-09-26 16:04:21 +100011config 64BIT
12 bool
13 default y if PPC64
14
Stephen Rothwell2578bfa2007-09-21 10:16:20 +100015config WORD_SIZE
16 int
17 default 64 if PPC64
18 default 32 if !PPC64
19
Jeremy Fitzhardinge600715d2008-09-11 01:31:45 -070020config ARCH_PHYS_ADDR_T_64BIT
21 def_bool PPC64 || PHYS_64BIT
22
FUJITA Tomonori787d44c2010-10-01 11:12:54 +000023config ARCH_DMA_ADDR_T_64BIT
24 def_bool ARCH_PHYS_ADDR_T_64BIT
25
Paul Mackerras14cf11a2005-09-26 16:04:21 +100026config MMU
27 bool
28 default y
29
Tony Breedsaa3be5f2007-09-21 13:26:02 +100030config GENERIC_CMOS_UPDATE
31 def_bool y
32
Tony Breeds4a4cfe32007-09-22 07:35:52 +100033config GENERIC_TIME_VSYSCALL
34 def_bool y
35
Tony Breedsd831d0b2007-09-21 13:26:03 +100036config GENERIC_CLOCKEVENTS
37 def_bool y
38
Tejun Heoc2a7e812009-08-14 15:00:53 +090039config HAVE_SETUP_PER_CPU_AREA
Tejun Heoe74e3962009-03-30 19:07:44 +090040 def_bool PPC64
41
Tejun Heoc2a7e812009-08-14 15:00:53 +090042config NEED_PER_CPU_EMBED_FIRST_CHUNK
travis@sgi.comb32ef632008-01-30 13:32:51 +010043 def_bool PPC64
44
Michael Ellerman551b81f2009-10-13 19:44:44 +000045config NR_IRQS
46 int "Number of virtual interrupt numbers"
Anton Blanchard859aefc2010-01-31 01:14:03 +000047 range 32 32768
Michael Ellerman551b81f2009-10-13 19:44:44 +000048 default "512"
49 help
50 This defines the number of virtual interrupt numbers the kernel
51 can manage. Virtual interrupt numbers are what you see in
52 /proc/interrupts. If you configure your system to have too few,
53 drivers will fail to load or worse - handle with care.
54
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100055config STACKTRACE_SUPPORT
56 bool
57 default y
58
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100059config HAVE_LATENCYTOP_SUPPORT
60 def_bool y
61
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100062config TRACE_IRQFLAGS_SUPPORT
63 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100064 default y
65
66config LOCKDEP_SUPPORT
67 bool
68 default y
69
Paul Mackerras14cf11a2005-09-26 16:04:21 +100070config RWSEM_GENERIC_SPINLOCK
71 bool
72
73config RWSEM_XCHGADD_ALGORITHM
74 bool
75 default y
76
Nick Piggin95c354f2008-01-30 13:31:20 +010077config GENERIC_LOCKBREAK
78 bool
79 default y
80 depends on SMP && PREEMPT
81
David Howellsf0d1b0b2006-12-08 02:37:49 -080082config ARCH_HAS_ILOG2_U32
83 bool
David Howellsef55d532006-12-08 02:37:53 -080084 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080085
86config ARCH_HAS_ILOG2_U64
87 bool
David Howellsef55d532006-12-08 02:37:53 -080088 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080089
Akinobu Mitae779b2f2006-03-26 01:39:33 -080090config GENERIC_HWEIGHT
91 bool
92 default y
93
Jon Mason0a9cb462006-05-19 15:35:32 -050094config GENERIC_FIND_NEXT_BIT
95 bool
96 default y
97
Anton Vorontsovb7ce3412008-04-11 23:06:36 +100098config GENERIC_GPIO
99 bool
100 help
101 Generic GPIO API support
102
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700103config ARCH_NO_VIRT_TO_BUS
104 def_bool PPC64
105
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000106config PPC
107 bool
108 default y
Stephen Rothwell10f85f42010-06-29 12:43:34 +1000109 select OF
Stephen Neuendorffere6ce1322010-11-18 15:54:56 -0800110 select OF_EARLY_FLATTREE
Steven Rostedt2b79d692009-01-06 18:49:17 +0000111 select HAVE_FTRACE_MCOUNT_RECORD
112 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400113 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500114 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700115 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100116 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700117 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700118 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500119 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500120 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800121 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000122 select HAVE_ARCH_TRACEHOOK
Yinghai Lu95f72d12010-07-12 14:36:09 +1000123 select HAVE_MEMBLOCK
FUJITA Tomonori46bab4e2009-08-04 19:08:26 +0000124 select HAVE_DMA_ATTRS
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000125 select HAVE_DMA_API_DEBUG
Jens Axboeb7d7a242008-06-26 11:22:13 +0200126 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400127 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100128 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000129 select GENERIC_ATOMIC64 if PPC32
Peter Zijlstrae360adb2010-10-14 14:01:34 +0800130 select HAVE_IRQ_WORK
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200131 select HAVE_PERF_EVENTS
Mahesh Salgaonkar359e4282010-04-07 18:10:20 +1000132 select HAVE_REGS_AND_STACK_ACCESS_API
K.Prasad5aae8a52010-06-15 11:35:19 +0530133 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
Thomas Gleixner26043622011-01-19 20:39:39 +0100134 select HAVE_GENERIC_HARDIRQS
135 select HAVE_SPARSE_IRQ
136 select IRQ_PER_CPU
Lennert Buytenhek17b9f9e2011-03-07 14:00:23 +0000137 select GENERIC_HARDIRQS_NO_DEPRECATED
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
169config PPC_UDBG_16550
170 bool
171 default n
172
Kumar Gala08264cb2006-01-10 21:43:56 -0600173config GENERIC_TBSYNC
174 bool
175 default y if PPC32 && SMP
176 default n
177
Al Viroe65e1fc2006-09-12 03:04:40 -0400178config AUDIT_ARCH
179 bool
180 default y
181
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800182config GENERIC_BUG
183 bool
184 default y
185 depends on BUG
186
Johannes Bergb3028872007-03-20 05:18:02 +1100187config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500188 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100189 bool
190
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600191config DEFAULT_UIMAGE
192 bool
193 help
194 Used to allow a board to specify it wants a uImage built by default
195 default n
196
Scott Woodb09c1642008-01-17 16:31:40 -0600197config REDBOOT
198 bool
199
Johannes Berg801e4062007-12-08 02:12:39 +0100200config ARCH_HIBERNATION_POSSIBLE
201 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000202 default y
203
Johannes Bergf4cb5702007-12-08 02:14:00 +0100204config ARCH_SUSPEND_POSSIBLE
205 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400206 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
Victor Gallardod164f6d2010-10-08 10:25:27 +0000207 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
Johannes Bergf4cb5702007-12-08 02:14:00 +0100208
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100209config PPC_DCR_NATIVE
210 bool
211 default n
212
213config PPC_DCR_MMIO
214 bool
215 default n
216
217config PPC_DCR
218 bool
219 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
220 default y
221
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100222config PPC_OF_PLATFORM_PCI
223 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100224 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100225 depends on PPC64 # not supported on 32 bits yet
226 default n
227
Akinobu Mita6a11f752009-03-31 15:23:17 -0700228config ARCH_SUPPORTS_DEBUG_PAGEALLOC
229 def_bool y
230
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000231config PPC_ADV_DEBUG_REGS
232 bool
233 depends on 40x || BOOKE
234 default y
235
236config PPC_ADV_DEBUG_IACS
237 int
238 depends on PPC_ADV_DEBUG_REGS
239 default 4 if 44x
240 default 2
241
242config PPC_ADV_DEBUG_DACS
243 int
244 depends on PPC_ADV_DEBUG_REGS
245 default 2
246
247config PPC_ADV_DEBUG_DVCS
248 int
249 depends on PPC_ADV_DEBUG_REGS
250 default 2 if 44x
251 default 0
252
253config PPC_ADV_DEBUG_DAC_RANGE
254 bool
255 depends on PPC_ADV_DEBUG_REGS && 44x
256 default y
257
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000258source "init/Kconfig"
259
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700260source "kernel/Kconfig.freezer"
261
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100262source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500263source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000264
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000265menu "Kernel options"
266
267config HIGHMEM
268 bool "High memory support"
269 depends on PPC32
270
Tony Breeds1ad74992007-09-21 13:26:03 +1000271source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000272source kernel/Kconfig.hz
273source kernel/Kconfig.preempt
274source "fs/Kconfig.binfmt"
275
Mel Gormanba72cb82007-11-28 16:21:13 -0800276config HUGETLB_PAGE_SIZE_VARIABLE
277 bool
278 depends on HUGETLB_PAGE
279 default y
280
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000281config MATH_EMULATION
282 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600283 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000284 ---help---
285 Some PowerPC chips designed for embedded applications do not have
286 a floating-point unit and therefore do not implement the
287 floating-point instructions in the PowerPC instruction set. If you
288 say Y here, the kernel will include code to emulate a floating-point
289 unit, which will allow programs that use floating-point
290 instructions to run.
291
Scott Wood5dd57a12007-09-18 15:29:35 -0500292config 8XX_MINIMAL_FPEMU
293 bool "Minimal math emulation for 8xx"
294 depends on 8xx && !MATH_EMULATION
295 help
296 Older arch/ppc kernels still emulated a few floating point
297 instructions such as load and store, even when full math
298 emulation is disabled. Say "Y" here if you want to preserve
299 this behavior.
300
301 It is recommended that you build a soft-float userspace instead.
302
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800303config IOMMU_HELPER
304 def_bool PPC64
305
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000306config SWIOTLB
307 bool "SWIOTLB support"
308 default n
309 select IOMMU_HELPER
310 ---help---
311 Support for IO bounce buffering for systems without an IOMMU.
312 This allows us to DMA to the full physical address space on
313 platforms where the size of a physical address is larger
314 than the bus address. Not all platforms support this.
315
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000316config HOTPLUG_CPU
317 bool "Support for enabling/disabling CPUs"
318 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
319 ---help---
320 Say Y here to be able to disable and re-enable individual
321 CPUs at runtime on SMP machines.
322
323 Say N if you are unsure.
324
Nathan Fontenot12633e82009-11-25 17:23:25 +0000325config ARCH_CPU_PROBE_RELEASE
326 def_bool y
327 depends on HOTPLUG_CPU
328
Yasunori Gotocc576372006-06-29 02:24:27 -0700329config ARCH_ENABLE_MEMORY_HOTPLUG
330 def_bool y
331
Badari Pulavartya99824f2008-02-05 00:10:18 -0800332config ARCH_HAS_WALK_MEMORY
333 def_bool y
334
Badari Pulavarty14824712008-02-05 00:10:17 -0800335config ARCH_ENABLE_MEMORY_HOTREMOVE
336 def_bool y
337
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000338config KEXEC
339 bool "kexec system call (EXPERIMENTAL)"
Matthew McClintockf933a412010-07-21 16:14:53 -0500340 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000341 help
342 kexec is a system call that implements the ability to shutdown your
343 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400344 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000345 you can start any kernel with it, not just Linux.
346
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400347 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000348
349 It is an ongoing process to be certain the hardware in a machine
350 is properly shutdown, so do not be surprised if this code does not
351 initially work for you. It may help to enable device hotplugging
352 support. As of this writing the exact hardware interface is
353 strongly in flux, so no good recommendation can be made.
354
Haren Mynenie8625d462006-01-14 13:48:25 -0800355config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000356 bool "Build a kdump crash kernel"
Matthew McClintockf933a412010-07-21 16:14:53 -0500357 depends on PPC64 || 6xx || FSL_BOOKE
358 select RELOCATABLE if PPC64 || FSL_BOOKE
Haren Mynenie8625d462006-01-14 13:48:25 -0800359 help
360 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000361 The same kernel binary can be used as production kernel and dump
362 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800363
Manish Ahuja242f2712008-03-22 10:50:50 +1100364config PHYP_DUMP
365 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
366 depends on PPC_PSERIES && EXPERIMENTAL
367 help
368 Hypervisor-assisted dump is meant to be a kdump replacement
369 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100370 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100371
372 If unsure, say "N"
373
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000374config PPCBUG_NVRAM
375 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
376 default y if PPC_PREP
377
378config IRQ_ALL_CPUS
379 bool "Distribute interrupts on all CPUs by default"
380 depends on SMP && !MV64360
381 help
382 This option gives the kernel permission to distribute IRQs across
383 multiple CPUs. Saying N here will route all IRQs to the first
384 CPU. Generally saying Y is safe, although some problems have been
385 reported with SMP Power Macintoshes with this option enabled.
386
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700387config NUMA
388 bool "NUMA support"
389 depends on PPC64
390 default y if SMP && PPC_PSERIES
391
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700392config NODES_SHIFT
393 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000394 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700395 default "4"
396 depends on NEED_MULTIPLE_NODES
397
Anton Blanchardea55bf22009-09-21 19:56:43 +0000398config MAX_ACTIVE_REGIONS
399 int
400 default "256" if PPC64
401 default "32"
402
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000403config ARCH_SELECT_MEMORY_MODEL
404 def_bool y
405 depends on PPC64
406
407config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000408 def_bool y
409 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000410
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000411config ARCH_SPARSEMEM_ENABLE
412 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000413 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700414 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100415
416config ARCH_SPARSEMEM_DEFAULT
417 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100418 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000419
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700420config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000421 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700422
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100423config SYS_SUPPORTS_HUGETLBFS
424 def_bool y
425 depends on PPC_BOOK3S_64
426
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700427source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000428
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800429config ARCH_MEMORY_PROBE
430 def_bool y
431 depends on MEMORY_HOTPLUG
432
Andy Whitcroft75167952006-10-21 10:24:14 -0700433# Some NUMA nodes have memory ranges that span
434# other nodes. Even though a pfn is valid and
435# between a node's start and end pfns, it may not
436# reside on that node. See memmap_init_zone()
437# for details.
438config NODES_SPAN_OTHER_NODES
439 def_bool y
440 depends on NEED_MULTIPLE_NODES
441
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000442config PPC_HAS_HASH_64K
443 bool
444 depends on PPC64
445 default n
446
Yuri Tikhonove1240122009-01-29 01:40:44 +0000447config STDBINUTILS
448 bool "Using standard binutils settings"
449 depends on 44x
450 default y
451 help
452 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
453 Note, that kernel will be able to run only those applications,
454 which had been compiled using binutils later than 2.17.50.0.3 with
455 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
456 the older binutils, you can patch them with a trivial patch, which
457 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
458
Ilya Yanokca9153a2008-12-11 04:55:41 +0300459choice
460 prompt "Page size"
461 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100462 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300463 Select the kernel logical page size. Increasing the page size
464 will reduce software overhead at each page boundary, allow
465 hardware prefetch mechanisms to be more effective, and allow
466 larger dma transfers increasing IO efficiency and reducing
467 overhead. However the utilization of memory will increase.
468 For example, each cached file will using a multiple of the
469 page size to hold its contents and the difference between the
470 end of file and the end of page is wasted.
471
472 Some dedicated systems, such as software raid serving with
473 accelerated calculations, have shown significant increases.
474
475 If you configure a 64 bit kernel for 64k pages but the
476 processor does not support them, then the kernel will simulate
477 them with 4k pages, loading them on demand, but with the
478 reduced software overhead and larger internal fragmentation.
479 For the 32 bit kernel, a large page option will not be offered
480 unless it is supported by the configured processor.
481
482 If unsure, choose 4K_PAGES.
483
484config PPC_4K_PAGES
485 bool "4k page size"
486
487config PPC_16K_PAGES
488 bool "16k page size" if 44x
489
490config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000491 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300492 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
493
Yuri Tikhonove1240122009-01-29 01:40:44 +0000494config PPC_256K_PAGES
495 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000496 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000497 help
498 Make the page size 256k.
499
500 As the ELF standard only requires alignment to support page
501 sizes up to 64k, you will need to compile all of your user
502 space applications with a non-standard binutils settings
503 (see the STDBINUTILS description for details).
504
505 Say N unless you know what you are doing.
506
Ilya Yanokca9153a2008-12-11 04:55:41 +0300507endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100508
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000509config FORCE_MAX_ZONEORDER
510 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000511 range 9 64 if PPC64 && PPC_64K_PAGES
512 default "9" if PPC64 && PPC_64K_PAGES
513 range 13 64 if PPC64 && !PPC_64K_PAGES
514 default "13" if PPC64 && !PPC_64K_PAGES
515 range 9 64 if PPC32 && PPC_16K_PAGES
516 default "9" if PPC32 && PPC_16K_PAGES
517 range 7 64 if PPC32 && PPC_64K_PAGES
518 default "7" if PPC32 && PPC_64K_PAGES
519 range 5 64 if PPC32 && PPC_256K_PAGES
520 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000521 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000522 default "11"
523 help
524 The kernel memory allocator divides physically contiguous memory
525 blocks into "zones", where each zone is a power of two number of
526 pages. This option selects the largest power of two that the kernel
527 keeps in the memory allocator. If you need to allocate very large
528 blocks of physically contiguous memory, then you may need to
529 increase this value.
530
531 This config option is actually maximum order plus one. For example,
532 a value of 11 means that the largest free memory block is 2^10 pages.
533
534 The page size is not necessarily 4KB. For example, on 64-bit
535 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
536 this in mind when choosing a value for this option.
537
Paul Mackerrasfa282372008-01-24 08:35:13 +1100538config PPC_SUBPAGE_PROT
539 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300540 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100541 help
542 This option adds support for a system call to allow user programs
543 to set access permissions (read/write, readonly, or no access)
544 on the 4k subpages of each 64k page.
545
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000546config SCHED_SMT
547 bool "SMT (Hyperthreading) scheduler support"
548 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000549 help
550 SMT scheduler support improves the CPU scheduler's decision making
551 when dealing with POWER5 cpus at a cost of slightly increased
552 overhead in some places. If unsure say N here.
553
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000554config CMDLINE_BOOL
555 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000556
557config CMDLINE
558 string "Initial kernel command string"
559 depends on CMDLINE_BOOL
560 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
561 help
562 On some platforms, there is currently no way for the boot loader to
563 pass arguments to the kernel. For these platforms, you can supply
564 some command-line options at build time by entering them here. In
565 most cases you will need to specify the root device here.
566
Grant Likelyc356aa42008-07-09 09:41:52 -0600567config EXTRA_TARGETS
568 string "Additional default image types"
569 help
570 List additional targets to be built by the bootwrapper here (separated
571 by spaces). This is useful for targets that depend of device tree
572 files in the .dts directory.
573
574 Targets in this list will be build as part of the default build
575 target, or when the user does a 'make zImage' or a
576 'make zImage.initrd'.
577
578 If unsure, leave blank
579
Johannes Bergb28f5082008-01-15 23:17:00 -0500580config ARCH_WANTS_FREEZER_CONTROL
581 def_bool y
582 depends on ADB_PMU
583
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000584source kernel/power/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000585
586config SECCOMP
587 bool "Enable seccomp to safely compute untrusted bytecode"
588 depends on PROC_FS
589 default y
590 help
591 This kernel feature is useful for number crunching applications
592 that may need to compute untrusted bytecode during their
593 execution. By using pipes or other transports made available to
594 the process as file descriptors supporting the read/write
595 syscalls, it's possible to isolate those applications in
596 their own address space using seccomp. Once seccomp is
597 enabled via /proc/<pid>/seccomp, it cannot be disabled
598 and the task is only allowed to execute a few safe syscalls
599 defined by each seccomp mode.
600
601 If unsure, say Y. Only embedded should say N here.
602
603endmenu
604
605config ISA_DMA_API
606 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100607 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000608
609menu "Bus options"
610
611config ISA
612 bool "Support for ISA-bus hardware"
613 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000614 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000615 help
616 Find out whether you have ISA slots on your motherboard. ISA is the
617 name of a bus system, i.e. the way the CPU talks to the other stuff
618 inside your box. If you have an Apple machine, say N here; if you
619 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
620 you have an embedded board, consult your board documentation.
621
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800622config ZONE_DMA
623 bool
624 default y
625
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800626config NEED_DMA_MAP_STATE
627 def_bool (PPC64 || NOT_COHERENT_CACHE)
628
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700629config NEED_SG_DMA_LENGTH
630 def_bool y
631
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000632config GENERIC_ISA_DMA
633 bool
Anton Vorontsov19274452010-07-15 07:38:16 +0000634 depends on ISA_DMA_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000635 default y
636
Paul Mackerras25635c72005-10-26 16:36:55 +1000637config PPC_INDIRECT_PCI
638 bool
639 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600640 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000641 default n
642
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000643config EISA
644 bool
645
646config SBUS
647 bool
648
Kumar Gala08264cb2006-01-10 21:43:56 -0600649config FSL_SOC
650 bool
651
Roy Zang55c44992007-07-10 18:44:34 +0800652config FSL_PCI
653 bool
654 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600655 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800656
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400657config FSL_PMC
658 bool
659 default y
660 depends on SUSPEND && (PPC_85xx || PPC_86xx)
661 help
662 Freescale MPC85xx/MPC86xx power management controller support
663 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
664
Victor Gallardod164f6d2010-10-08 10:25:27 +0000665config PPC4xx_CPM
666 bool
667 default y
668 depends on SUSPEND && (44x || 40x)
669 help
670 PPC4xx Clock Power Management (CPM) support (suspend/resume).
671 It also enables support for two different idle states (idle-wait
672 and idle-doze).
673
Stefan Roese2a706912008-03-26 22:39:50 +1100674config 4xx_SOC
675 bool
676
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400677config FSL_LBC
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800678 bool "Freescale Local Bus support"
679 depends on FSL_SOC
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400680 help
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800681 Enables reporting of errors from the Freescale local bus
682 controller. Also contains some common code used by
683 drivers for specific local bus peripherals.
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400684
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400685config FSL_GTM
686 bool
687 depends on PPC_83xx || QUICC_ENGINE || CPM2
688 help
689 Freescale General-purpose Timers support
690
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000691# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
692config MCA
693 bool
694
John Rigbyb5005632008-06-26 11:07:56 -0600695# Platforms that what PCI turned unconditionally just do select PCI
696# in their config node. Platforms that want to choose at config
697# time should select PPC_PCI_CHOICE
698config PPC_PCI_CHOICE
699 bool
700
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000701config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600702 bool "PCI support" if PPC_PCI_CHOICE
703 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000704 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
David Gibsonf21f49e2007-06-13 14:52:54 +1000705 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000706 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000707 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000708 help
709 Find out whether your system includes a PCI bus. PCI is the name of
710 a bus system, i.e. the way the CPU talks to the other stuff inside
711 your box. If you say Y here, the kernel will include drivers and
712 infrastructure code to support PCI bus devices.
713
714config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600715 def_bool PCI
716
717config PCI_SYSCALL
718 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000719
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000720config PCI_QSPAN
721 bool "QSpan PCI"
722 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000723 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000724 help
725 Say Y here if you have a system based on a Motorola 8xx-series
726 embedded processor with a QSPAN PCI interface, otherwise say N.
727
728config PCI_8260
729 bool
730 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000731 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000732 default y
733
734config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700735 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500736 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000737 default y
738
739choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700740 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000741 depends on 8260_PCI9
742
743config 8260_PCI9_IDMA1
744 bool "IDMA1"
745
746config 8260_PCI9_IDMA2
747 bool "IDMA2"
748
749config 8260_PCI9_IDMA3
750 bool "IDMA3"
751
752config 8260_PCI9_IDMA4
753 bool "IDMA4"
754
755endchoice
756
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500757source "drivers/pci/pcie/Kconfig"
758
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000759source "drivers/pci/Kconfig"
760
761source "drivers/pcmcia/Kconfig"
762
763source "drivers/pci/hotplug/Kconfig"
764
Zhang Weif1f389d2008-04-18 13:33:39 -0700765config HAS_RAPIDIO
766 bool
767 default n
768
769config RAPIDIO
770 bool "RapidIO support"
771 depends on HAS_RAPIDIO
772 help
773 If you say Y here, the kernel will include drivers and
774 infrastructure code to support RapidIO interconnect devices.
775
776source "drivers/rapidio/Kconfig"
777
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000778endmenu
779
780menu "Advanced setup"
781 depends on PPC32
782
783config ADVANCED_OPTIONS
784 bool "Prompt for advanced kernel configuration options"
785 help
786 This option will enable prompting for a variety of advanced kernel
787 configuration options. These options can cause the kernel to not
788 work if they are set incorrectly, but can be used to optimize certain
789 aspects of kernel memory management.
790
791 Unless you know what you are doing, say N here.
792
793comment "Default settings for advanced configuration options are used"
794 depends on !ADVANCED_OPTIONS
795
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000796config LOWMEM_SIZE_BOOL
797 bool "Set maximum low memory"
798 depends on ADVANCED_OPTIONS
799 help
800 This option allows you to set the maximum amount of memory which
801 will be used as "low memory", that is, memory which the kernel can
802 access directly, without having to set up a kernel virtual mapping.
803 This can be useful in optimizing the layout of kernel virtual
804 memory.
805
806 Say N here unless you know what you are doing.
807
808config LOWMEM_SIZE
809 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
810 default "0x30000000"
811
Trent Piepho96051462008-12-08 19:34:58 -0800812config LOWMEM_CAM_NUM_BOOL
813 bool "Set number of CAMs to use to map low memory"
814 depends on ADVANCED_OPTIONS && FSL_BOOKE
815 help
816 This option allows you to set the maximum number of CAM slots that
817 will be used to map low memory. There are a limited number of slots
818 available and even more limited number that will fit in the L1 MMU.
819 However, using more entries will allow mapping more low memory. This
820 can be useful in optimizing the layout of kernel virtual memory.
821
822 Say N here unless you know what you are doing.
823
824config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400825 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800826 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
827 default 3
828
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000829config RELOCATABLE
830 bool "Build a relocatable kernel (EXPERIMENTAL)"
831 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
832 help
833 This builds a kernel image that is capable of running at the
834 location the kernel is loaded at (some alignment restrictions may
835 exist).
836
837 One use is for the kexec on panic case where the recovery kernel
838 must live at a different physical address than the primary
839 kernel.
840
841 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
842 it has been loaded at and the compile time physical addresses
843 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
844 setting can still be useful to bootwrappers that need to know the
845 load location of the kernel (eg. u-boot/mkimage).
846
847config PAGE_OFFSET_BOOL
848 bool "Set custom page offset address"
849 depends on ADVANCED_OPTIONS
850 help
851 This option allows you to set the kernel virtual address at which
852 the kernel will map low memory. This can be useful in optimizing
853 the virtual memory layout of the system.
854
855 Say N here unless you know what you are doing.
856
857config PAGE_OFFSET
858 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
859 default "0xc0000000"
860
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000861config KERNEL_START_BOOL
862 bool "Set custom kernel base address"
863 depends on ADVANCED_OPTIONS
864 help
865 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000866 the kernel will be loaded. Normally this should match PAGE_OFFSET
867 however there are times (like kdump) that one might not want them
868 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000869
870 Say N here unless you know what you are doing.
871
872config KERNEL_START
873 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000874 default PAGE_OFFSET if PAGE_OFFSET_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500875 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000876 default "0xc0000000"
877
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000878config PHYSICAL_START_BOOL
879 bool "Set physical address where the kernel is loaded"
880 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
881 help
882 This gives the physical address where the kernel is loaded.
883
884 Say N here unless you know what you are doing.
885
886config PHYSICAL_START
887 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500888 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000889 default "0x00000000"
890
891config PHYSICAL_ALIGN
892 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800893 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000894 help
895 This value puts the alignment restrictions on physical address
896 where kernel is loaded and run from. Kernel is compiled for an
897 address which meets above alignment restriction.
898
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000899config TASK_SIZE_BOOL
900 bool "Set custom user task size"
901 depends on ADVANCED_OPTIONS
902 help
903 This option allows you to set the amount of virtual address space
904 allocated to user tasks. This can be useful in optimizing the
905 virtual memory layout of the system.
906
907 Say N here unless you know what you are doing.
908
909config TASK_SIZE
910 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500911 default "0x80000000" if PPC_PREP || PPC_8xx
912 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000913
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000914config CONSISTENT_SIZE_BOOL
915 bool "Set custom consistent memory pool size"
916 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
917 help
918 This option allows you to set the size of the
919 consistent memory pool. This pool of virtual memory
920 is used to make consistent memory allocations.
921
922config CONSISTENT_SIZE
923 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
924 default "0x00200000" if NOT_COHERENT_CACHE
925
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000926config PIN_TLB
927 bool "Pinned Kernel TLBs (860 ONLY)"
928 depends on ADVANCED_OPTIONS && 8xx
929endmenu
930
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000931if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000932config RELOCATABLE
933 bool "Build a relocatable kernel"
934 help
935 This builds a kernel image that is capable of running anywhere
936 in the RMA (real memory area) at any 16k-aligned base address.
937 The kernel is linked as a position-independent executable (PIE)
938 and contains dynamic relocations which are processed early
939 in the bootup process.
940
941 One use is for the kexec on panic case where the recovery kernel
942 must live at a different physical address than the primary
943 kernel.
944
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000945config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000946 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000947 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000948config KERNEL_START
949 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000950 default "0xc000000000000000"
951config PHYSICAL_START
952 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000953 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000954endif
955
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000956source "net/Kconfig"
957
958source "drivers/Kconfig"
959
960source "fs/Kconfig"
961
Li Yang98658532006-10-03 23:10:46 -0500962source "arch/powerpc/sysdev/qe_lib/Kconfig"
963
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000964source "lib/Kconfig"
965
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000966source "arch/powerpc/Kconfig.debug"
967
968source "security/Kconfig"
969
970config KEYS_COMPAT
971 bool
972 depends on COMPAT && KEYS
973 default y
974
975source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000976
977config PPC_CLOCK
978 bool
979 default n
David Brownell9483a572008-07-23 21:26:48 -0700980 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000981
982config PPC_LIB_RHEAP
983 bool
984
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500985source "arch/powerpc/kvm/Kconfig"