blob: 7d69e9bf5e64b28d1129c731f39489e5758b5450 [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
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000137
138config EARLY_PRINTK
139 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100140 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000141
142config COMPAT
143 bool
144 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800145 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000146
147config SYSVIPC_COMPAT
148 bool
149 depends on COMPAT && SYSVIPC
150 default y
151
152# All PPC32s use generic nvram driver through ppc_md
153config GENERIC_NVRAM
154 bool
155 default y if PPC32
156
Ingo Molnarae1e9132008-11-11 09:05:16 +0100157config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000158 bool
159 default y
160
161config ARCH_MAY_HAVE_PC_FDC
162 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100163 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000164
Kumar Gala08264cb2006-01-10 21:43:56 -0600165config PPC_OF
166 def_bool y
167
168config PPC_UDBG_16550
169 bool
170 default n
171
Kumar Gala08264cb2006-01-10 21:43:56 -0600172config GENERIC_TBSYNC
173 bool
174 default y if PPC32 && SMP
175 default n
176
Al Viroe65e1fc2006-09-12 03:04:40 -0400177config AUDIT_ARCH
178 bool
179 default y
180
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800181config GENERIC_BUG
182 bool
183 default y
184 depends on BUG
185
Johannes Bergb3028872007-03-20 05:18:02 +1100186config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500187 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100188 bool
189
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600190config DEFAULT_UIMAGE
191 bool
192 help
193 Used to allow a board to specify it wants a uImage built by default
194 default n
195
Scott Woodb09c1642008-01-17 16:31:40 -0600196config REDBOOT
197 bool
198
Johannes Berg801e4062007-12-08 02:12:39 +0100199config ARCH_HIBERNATION_POSSIBLE
200 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000201 default y
202
Johannes Bergf4cb5702007-12-08 02:14:00 +0100203config ARCH_SUSPEND_POSSIBLE
204 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400205 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
Victor Gallardod164f6d2010-10-08 10:25:27 +0000206 PPC_85xx || PPC_86xx || PPC_PSERIES || 44x || 40x
Johannes Bergf4cb5702007-12-08 02:14:00 +0100207
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100208config PPC_DCR_NATIVE
209 bool
210 default n
211
212config PPC_DCR_MMIO
213 bool
214 default n
215
216config PPC_DCR
217 bool
218 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
219 default y
220
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100221config PPC_OF_PLATFORM_PCI
222 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100223 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100224 depends on PPC64 # not supported on 32 bits yet
225 default n
226
Akinobu Mita6a11f752009-03-31 15:23:17 -0700227config ARCH_SUPPORTS_DEBUG_PAGEALLOC
228 def_bool y
229
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000230config PPC_ADV_DEBUG_REGS
231 bool
232 depends on 40x || BOOKE
233 default y
234
235config PPC_ADV_DEBUG_IACS
236 int
237 depends on PPC_ADV_DEBUG_REGS
238 default 4 if 44x
239 default 2
240
241config PPC_ADV_DEBUG_DACS
242 int
243 depends on PPC_ADV_DEBUG_REGS
244 default 2
245
246config PPC_ADV_DEBUG_DVCS
247 int
248 depends on PPC_ADV_DEBUG_REGS
249 default 2 if 44x
250 default 0
251
252config PPC_ADV_DEBUG_DAC_RANGE
253 bool
254 depends on PPC_ADV_DEBUG_REGS && 44x
255 default y
256
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000257source "init/Kconfig"
258
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700259source "kernel/Kconfig.freezer"
260
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100261source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500262source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000263
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000264menu "Kernel options"
265
266config HIGHMEM
267 bool "High memory support"
268 depends on PPC32
269
Tony Breeds1ad74992007-09-21 13:26:03 +1000270source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000271source kernel/Kconfig.hz
272source kernel/Kconfig.preempt
273source "fs/Kconfig.binfmt"
274
Mel Gormanba72cb82007-11-28 16:21:13 -0800275config HUGETLB_PAGE_SIZE_VARIABLE
276 bool
277 depends on HUGETLB_PAGE
278 default y
279
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000280config MATH_EMULATION
281 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600282 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000283 ---help---
284 Some PowerPC chips designed for embedded applications do not have
285 a floating-point unit and therefore do not implement the
286 floating-point instructions in the PowerPC instruction set. If you
287 say Y here, the kernel will include code to emulate a floating-point
288 unit, which will allow programs that use floating-point
289 instructions to run.
290
Scott Wood5dd57a12007-09-18 15:29:35 -0500291config 8XX_MINIMAL_FPEMU
292 bool "Minimal math emulation for 8xx"
293 depends on 8xx && !MATH_EMULATION
294 help
295 Older arch/ppc kernels still emulated a few floating point
296 instructions such as load and store, even when full math
297 emulation is disabled. Say "Y" here if you want to preserve
298 this behavior.
299
300 It is recommended that you build a soft-float userspace instead.
301
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800302config IOMMU_HELPER
303 def_bool PPC64
304
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000305config SWIOTLB
306 bool "SWIOTLB support"
307 default n
308 select IOMMU_HELPER
309 ---help---
310 Support for IO bounce buffering for systems without an IOMMU.
311 This allows us to DMA to the full physical address space on
312 platforms where the size of a physical address is larger
313 than the bus address. Not all platforms support this.
314
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000315config HOTPLUG_CPU
316 bool "Support for enabling/disabling CPUs"
317 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
318 ---help---
319 Say Y here to be able to disable and re-enable individual
320 CPUs at runtime on SMP machines.
321
322 Say N if you are unsure.
323
Nathan Fontenot12633e82009-11-25 17:23:25 +0000324config ARCH_CPU_PROBE_RELEASE
325 def_bool y
326 depends on HOTPLUG_CPU
327
Yasunori Gotocc576372006-06-29 02:24:27 -0700328config ARCH_ENABLE_MEMORY_HOTPLUG
329 def_bool y
330
Badari Pulavartya99824f2008-02-05 00:10:18 -0800331config ARCH_HAS_WALK_MEMORY
332 def_bool y
333
Badari Pulavarty14824712008-02-05 00:10:17 -0800334config ARCH_ENABLE_MEMORY_HOTREMOVE
335 def_bool y
336
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000337config KEXEC
338 bool "kexec system call (EXPERIMENTAL)"
Matthew McClintockf933a412010-07-21 16:14:53 -0500339 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000340 help
341 kexec is a system call that implements the ability to shutdown your
342 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400343 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000344 you can start any kernel with it, not just Linux.
345
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400346 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000347
348 It is an ongoing process to be certain the hardware in a machine
349 is properly shutdown, so do not be surprised if this code does not
350 initially work for you. It may help to enable device hotplugging
351 support. As of this writing the exact hardware interface is
352 strongly in flux, so no good recommendation can be made.
353
Haren Mynenie8625d462006-01-14 13:48:25 -0800354config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000355 bool "Build a kdump crash kernel"
Matthew McClintockf933a412010-07-21 16:14:53 -0500356 depends on PPC64 || 6xx || FSL_BOOKE
357 select RELOCATABLE if PPC64 || FSL_BOOKE
Haren Mynenie8625d462006-01-14 13:48:25 -0800358 help
359 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000360 The same kernel binary can be used as production kernel and dump
361 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800362
Manish Ahuja242f2712008-03-22 10:50:50 +1100363config PHYP_DUMP
364 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
365 depends on PPC_PSERIES && EXPERIMENTAL
366 help
367 Hypervisor-assisted dump is meant to be a kdump replacement
368 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100369 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100370
371 If unsure, say "N"
372
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000373config PPCBUG_NVRAM
374 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
375 default y if PPC_PREP
376
377config IRQ_ALL_CPUS
378 bool "Distribute interrupts on all CPUs by default"
379 depends on SMP && !MV64360
380 help
381 This option gives the kernel permission to distribute IRQs across
382 multiple CPUs. Saying N here will route all IRQs to the first
383 CPU. Generally saying Y is safe, although some problems have been
384 reported with SMP Power Macintoshes with this option enabled.
385
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700386config NUMA
387 bool "NUMA support"
388 depends on PPC64
389 default y if SMP && PPC_PSERIES
390
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700391config NODES_SHIFT
392 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000393 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700394 default "4"
395 depends on NEED_MULTIPLE_NODES
396
Anton Blanchardea55bf22009-09-21 19:56:43 +0000397config MAX_ACTIVE_REGIONS
398 int
399 default "256" if PPC64
400 default "32"
401
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000402config ARCH_SELECT_MEMORY_MODEL
403 def_bool y
404 depends on PPC64
405
406config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000407 def_bool y
408 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000409
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000410config ARCH_SPARSEMEM_ENABLE
411 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000412 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700413 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100414
415config ARCH_SPARSEMEM_DEFAULT
416 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100417 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000418
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700419config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000420 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700421
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100422config SYS_SUPPORTS_HUGETLBFS
423 def_bool y
424 depends on PPC_BOOK3S_64
425
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700426source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000427
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800428config ARCH_MEMORY_PROBE
429 def_bool y
430 depends on MEMORY_HOTPLUG
431
Andy Whitcroft75167952006-10-21 10:24:14 -0700432# Some NUMA nodes have memory ranges that span
433# other nodes. Even though a pfn is valid and
434# between a node's start and end pfns, it may not
435# reside on that node. See memmap_init_zone()
436# for details.
437config NODES_SPAN_OTHER_NODES
438 def_bool y
439 depends on NEED_MULTIPLE_NODES
440
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000441config PPC_HAS_HASH_64K
442 bool
443 depends on PPC64
444 default n
445
Yuri Tikhonove1240122009-01-29 01:40:44 +0000446config STDBINUTILS
447 bool "Using standard binutils settings"
448 depends on 44x
449 default y
450 help
451 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
452 Note, that kernel will be able to run only those applications,
453 which had been compiled using binutils later than 2.17.50.0.3 with
454 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
455 the older binutils, you can patch them with a trivial patch, which
456 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
457
Ilya Yanokca9153a2008-12-11 04:55:41 +0300458choice
459 prompt "Page size"
460 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100461 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300462 Select the kernel logical page size. Increasing the page size
463 will reduce software overhead at each page boundary, allow
464 hardware prefetch mechanisms to be more effective, and allow
465 larger dma transfers increasing IO efficiency and reducing
466 overhead. However the utilization of memory will increase.
467 For example, each cached file will using a multiple of the
468 page size to hold its contents and the difference between the
469 end of file and the end of page is wasted.
470
471 Some dedicated systems, such as software raid serving with
472 accelerated calculations, have shown significant increases.
473
474 If you configure a 64 bit kernel for 64k pages but the
475 processor does not support them, then the kernel will simulate
476 them with 4k pages, loading them on demand, but with the
477 reduced software overhead and larger internal fragmentation.
478 For the 32 bit kernel, a large page option will not be offered
479 unless it is supported by the configured processor.
480
481 If unsure, choose 4K_PAGES.
482
483config PPC_4K_PAGES
484 bool "4k page size"
485
486config PPC_16K_PAGES
487 bool "16k page size" if 44x
488
489config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000490 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300491 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
492
Yuri Tikhonove1240122009-01-29 01:40:44 +0000493config PPC_256K_PAGES
494 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000495 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000496 help
497 Make the page size 256k.
498
499 As the ELF standard only requires alignment to support page
500 sizes up to 64k, you will need to compile all of your user
501 space applications with a non-standard binutils settings
502 (see the STDBINUTILS description for details).
503
504 Say N unless you know what you are doing.
505
Ilya Yanokca9153a2008-12-11 04:55:41 +0300506endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100507
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000508config FORCE_MAX_ZONEORDER
509 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000510 range 9 64 if PPC64 && PPC_64K_PAGES
511 default "9" if PPC64 && PPC_64K_PAGES
512 range 13 64 if PPC64 && !PPC_64K_PAGES
513 default "13" if PPC64 && !PPC_64K_PAGES
514 range 9 64 if PPC32 && PPC_16K_PAGES
515 default "9" if PPC32 && PPC_16K_PAGES
516 range 7 64 if PPC32 && PPC_64K_PAGES
517 default "7" if PPC32 && PPC_64K_PAGES
518 range 5 64 if PPC32 && PPC_256K_PAGES
519 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000520 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000521 default "11"
522 help
523 The kernel memory allocator divides physically contiguous memory
524 blocks into "zones", where each zone is a power of two number of
525 pages. This option selects the largest power of two that the kernel
526 keeps in the memory allocator. If you need to allocate very large
527 blocks of physically contiguous memory, then you may need to
528 increase this value.
529
530 This config option is actually maximum order plus one. For example,
531 a value of 11 means that the largest free memory block is 2^10 pages.
532
533 The page size is not necessarily 4KB. For example, on 64-bit
534 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
535 this in mind when choosing a value for this option.
536
Paul Mackerrasfa282372008-01-24 08:35:13 +1100537config PPC_SUBPAGE_PROT
538 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300539 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100540 help
541 This option adds support for a system call to allow user programs
542 to set access permissions (read/write, readonly, or no access)
543 on the 4k subpages of each 64k page.
544
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000545config SCHED_SMT
546 bool "SMT (Hyperthreading) scheduler support"
547 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000548 help
549 SMT scheduler support improves the CPU scheduler's decision making
550 when dealing with POWER5 cpus at a cost of slightly increased
551 overhead in some places. If unsure say N here.
552
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000553config CMDLINE_BOOL
554 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000555
556config CMDLINE
557 string "Initial kernel command string"
558 depends on CMDLINE_BOOL
559 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
560 help
561 On some platforms, there is currently no way for the boot loader to
562 pass arguments to the kernel. For these platforms, you can supply
563 some command-line options at build time by entering them here. In
564 most cases you will need to specify the root device here.
565
Grant Likelyc356aa42008-07-09 09:41:52 -0600566config EXTRA_TARGETS
567 string "Additional default image types"
568 help
569 List additional targets to be built by the bootwrapper here (separated
570 by spaces). This is useful for targets that depend of device tree
571 files in the .dts directory.
572
573 Targets in this list will be build as part of the default build
574 target, or when the user does a 'make zImage' or a
575 'make zImage.initrd'.
576
577 If unsure, leave blank
578
Johannes Bergb28f5082008-01-15 23:17:00 -0500579config ARCH_WANTS_FREEZER_CONTROL
580 def_bool y
581 depends on ADB_PMU
582
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000583source kernel/power/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000584
585config SECCOMP
586 bool "Enable seccomp to safely compute untrusted bytecode"
587 depends on PROC_FS
588 default y
589 help
590 This kernel feature is useful for number crunching applications
591 that may need to compute untrusted bytecode during their
592 execution. By using pipes or other transports made available to
593 the process as file descriptors supporting the read/write
594 syscalls, it's possible to isolate those applications in
595 their own address space using seccomp. Once seccomp is
596 enabled via /proc/<pid>/seccomp, it cannot be disabled
597 and the task is only allowed to execute a few safe syscalls
598 defined by each seccomp mode.
599
600 If unsure, say Y. Only embedded should say N here.
601
602endmenu
603
604config ISA_DMA_API
605 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100606 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000607
608menu "Bus options"
609
610config ISA
611 bool "Support for ISA-bus hardware"
612 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000613 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000614 help
615 Find out whether you have ISA slots on your motherboard. ISA is the
616 name of a bus system, i.e. the way the CPU talks to the other stuff
617 inside your box. If you have an Apple machine, say N here; if you
618 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
619 you have an embedded board, consult your board documentation.
620
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800621config ZONE_DMA
622 bool
623 default y
624
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800625config NEED_DMA_MAP_STATE
626 def_bool (PPC64 || NOT_COHERENT_CACHE)
627
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700628config NEED_SG_DMA_LENGTH
629 def_bool y
630
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000631config GENERIC_ISA_DMA
632 bool
Anton Vorontsov19274452010-07-15 07:38:16 +0000633 depends on ISA_DMA_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000634 default y
635
Paul Mackerras25635c72005-10-26 16:36:55 +1000636config PPC_INDIRECT_PCI
637 bool
638 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600639 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000640 default n
641
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000642config EISA
643 bool
644
645config SBUS
646 bool
647
Kumar Gala08264cb2006-01-10 21:43:56 -0600648config FSL_SOC
649 bool
650
Roy Zang55c44992007-07-10 18:44:34 +0800651config FSL_PCI
652 bool
653 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600654 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800655
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400656config FSL_PMC
657 bool
658 default y
659 depends on SUSPEND && (PPC_85xx || PPC_86xx)
660 help
661 Freescale MPC85xx/MPC86xx power management controller support
662 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
663
Victor Gallardod164f6d2010-10-08 10:25:27 +0000664config PPC4xx_CPM
665 bool
666 default y
667 depends on SUSPEND && (44x || 40x)
668 help
669 PPC4xx Clock Power Management (CPM) support (suspend/resume).
670 It also enables support for two different idle states (idle-wait
671 and idle-doze).
672
Stefan Roese2a706912008-03-26 22:39:50 +1100673config 4xx_SOC
674 bool
675
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400676config FSL_LBC
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800677 bool "Freescale Local Bus support"
678 depends on FSL_SOC
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400679 help
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800680 Enables reporting of errors from the Freescale local bus
681 controller. Also contains some common code used by
682 drivers for specific local bus peripherals.
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400683
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400684config FSL_GTM
685 bool
686 depends on PPC_83xx || QUICC_ENGINE || CPM2
687 help
688 Freescale General-purpose Timers support
689
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000690# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
691config MCA
692 bool
693
John Rigbyb5005632008-06-26 11:07:56 -0600694# Platforms that what PCI turned unconditionally just do select PCI
695# in their config node. Platforms that want to choose at config
696# time should select PPC_PCI_CHOICE
697config PPC_PCI_CHOICE
698 bool
699
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000700config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600701 bool "PCI support" if PPC_PCI_CHOICE
702 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000703 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
David Gibsonf21f49e2007-06-13 14:52:54 +1000704 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000705 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000706 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000707 help
708 Find out whether your system includes a PCI bus. PCI is the name of
709 a bus system, i.e. the way the CPU talks to the other stuff inside
710 your box. If you say Y here, the kernel will include drivers and
711 infrastructure code to support PCI bus devices.
712
713config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600714 def_bool PCI
715
716config PCI_SYSCALL
717 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000718
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000719config PCI_QSPAN
720 bool "QSpan PCI"
721 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000722 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000723 help
724 Say Y here if you have a system based on a Motorola 8xx-series
725 embedded processor with a QSPAN PCI interface, otherwise say N.
726
727config PCI_8260
728 bool
729 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000730 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000731 default y
732
733config 8260_PCI9
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700734 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500735 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000736 default y
737
738choice
Andrew Morton4a3ecc62006-06-01 20:36:04 -0700739 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000740 depends on 8260_PCI9
741
742config 8260_PCI9_IDMA1
743 bool "IDMA1"
744
745config 8260_PCI9_IDMA2
746 bool "IDMA2"
747
748config 8260_PCI9_IDMA3
749 bool "IDMA3"
750
751config 8260_PCI9_IDMA4
752 bool "IDMA4"
753
754endchoice
755
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500756source "drivers/pci/pcie/Kconfig"
757
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000758source "drivers/pci/Kconfig"
759
760source "drivers/pcmcia/Kconfig"
761
762source "drivers/pci/hotplug/Kconfig"
763
Zhang Weif1f389d2008-04-18 13:33:39 -0700764config HAS_RAPIDIO
765 bool
766 default n
767
768config RAPIDIO
769 bool "RapidIO support"
770 depends on HAS_RAPIDIO
771 help
772 If you say Y here, the kernel will include drivers and
773 infrastructure code to support RapidIO interconnect devices.
774
775source "drivers/rapidio/Kconfig"
776
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000777endmenu
778
779menu "Advanced setup"
780 depends on PPC32
781
782config ADVANCED_OPTIONS
783 bool "Prompt for advanced kernel configuration options"
784 help
785 This option will enable prompting for a variety of advanced kernel
786 configuration options. These options can cause the kernel to not
787 work if they are set incorrectly, but can be used to optimize certain
788 aspects of kernel memory management.
789
790 Unless you know what you are doing, say N here.
791
792comment "Default settings for advanced configuration options are used"
793 depends on !ADVANCED_OPTIONS
794
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000795config LOWMEM_SIZE_BOOL
796 bool "Set maximum low memory"
797 depends on ADVANCED_OPTIONS
798 help
799 This option allows you to set the maximum amount of memory which
800 will be used as "low memory", that is, memory which the kernel can
801 access directly, without having to set up a kernel virtual mapping.
802 This can be useful in optimizing the layout of kernel virtual
803 memory.
804
805 Say N here unless you know what you are doing.
806
807config LOWMEM_SIZE
808 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
809 default "0x30000000"
810
Trent Piepho96051462008-12-08 19:34:58 -0800811config LOWMEM_CAM_NUM_BOOL
812 bool "Set number of CAMs to use to map low memory"
813 depends on ADVANCED_OPTIONS && FSL_BOOKE
814 help
815 This option allows you to set the maximum number of CAM slots that
816 will be used to map low memory. There are a limited number of slots
817 available and even more limited number that will fit in the L1 MMU.
818 However, using more entries will allow mapping more low memory. This
819 can be useful in optimizing the layout of kernel virtual memory.
820
821 Say N here unless you know what you are doing.
822
823config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400824 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800825 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
826 default 3
827
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000828config RELOCATABLE
829 bool "Build a relocatable kernel (EXPERIMENTAL)"
830 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
831 help
832 This builds a kernel image that is capable of running at the
833 location the kernel is loaded at (some alignment restrictions may
834 exist).
835
836 One use is for the kexec on panic case where the recovery kernel
837 must live at a different physical address than the primary
838 kernel.
839
840 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
841 it has been loaded at and the compile time physical addresses
842 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
843 setting can still be useful to bootwrappers that need to know the
844 load location of the kernel (eg. u-boot/mkimage).
845
846config PAGE_OFFSET_BOOL
847 bool "Set custom page offset address"
848 depends on ADVANCED_OPTIONS
849 help
850 This option allows you to set the kernel virtual address at which
851 the kernel will map low memory. This can be useful in optimizing
852 the virtual memory layout of the system.
853
854 Say N here unless you know what you are doing.
855
856config PAGE_OFFSET
857 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
858 default "0xc0000000"
859
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000860config KERNEL_START_BOOL
861 bool "Set custom kernel base address"
862 depends on ADVANCED_OPTIONS
863 help
864 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000865 the kernel will be loaded. Normally this should match PAGE_OFFSET
866 however there are times (like kdump) that one might not want them
867 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000868
869 Say N here unless you know what you are doing.
870
871config KERNEL_START
872 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000873 default PAGE_OFFSET if PAGE_OFFSET_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500874 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000875 default "0xc0000000"
876
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000877config PHYSICAL_START_BOOL
878 bool "Set physical address where the kernel is loaded"
879 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
880 help
881 This gives the physical address where the kernel is loaded.
882
883 Say N here unless you know what you are doing.
884
885config PHYSICAL_START
886 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500887 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000888 default "0x00000000"
889
890config PHYSICAL_ALIGN
891 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800892 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000893 help
894 This value puts the alignment restrictions on physical address
895 where kernel is loaded and run from. Kernel is compiled for an
896 address which meets above alignment restriction.
897
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000898config TASK_SIZE_BOOL
899 bool "Set custom user task size"
900 depends on ADVANCED_OPTIONS
901 help
902 This option allows you to set the amount of virtual address space
903 allocated to user tasks. This can be useful in optimizing the
904 virtual memory layout of the system.
905
906 Say N here unless you know what you are doing.
907
908config TASK_SIZE
909 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500910 default "0x80000000" if PPC_PREP || PPC_8xx
911 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000912
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000913config CONSISTENT_SIZE_BOOL
914 bool "Set custom consistent memory pool size"
915 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
916 help
917 This option allows you to set the size of the
918 consistent memory pool. This pool of virtual memory
919 is used to make consistent memory allocations.
920
921config CONSISTENT_SIZE
922 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
923 default "0x00200000" if NOT_COHERENT_CACHE
924
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000925config PIN_TLB
926 bool "Pinned Kernel TLBs (860 ONLY)"
927 depends on ADVANCED_OPTIONS && 8xx
928endmenu
929
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000930if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000931config RELOCATABLE
932 bool "Build a relocatable kernel"
933 help
934 This builds a kernel image that is capable of running anywhere
935 in the RMA (real memory area) at any 16k-aligned base address.
936 The kernel is linked as a position-independent executable (PIE)
937 and contains dynamic relocations which are processed early
938 in the bootup process.
939
940 One use is for the kexec on panic case where the recovery kernel
941 must live at a different physical address than the primary
942 kernel.
943
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000944config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000945 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000946 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000947config KERNEL_START
948 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000949 default "0xc000000000000000"
950config PHYSICAL_START
951 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000952 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +1000953endif
954
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000955source "net/Kconfig"
956
957source "drivers/Kconfig"
958
959source "fs/Kconfig"
960
Li Yang98658532006-10-03 23:10:46 -0500961source "arch/powerpc/sysdev/qe_lib/Kconfig"
962
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000963source "lib/Kconfig"
964
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000965source "arch/powerpc/Kconfig.debug"
966
967source "security/Kconfig"
968
969config KEYS_COMPAT
970 bool
971 depends on COMPAT && KEYS
972 default y
973
974source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000975
976config PPC_CLOCK
977 bool
978 default n
David Brownell9483a572008-07-23 21:26:48 -0700979 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000980
981config PPC_LIB_RHEAP
982 bool
983
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500984source "arch/powerpc/kvm/Kconfig"