blob: a030e5ecb10b76dcf41ef0cb2d22e3f267bae604 [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
Tejun Heoc2a7e812009-08-14 15:00:53 +090030config HAVE_SETUP_PER_CPU_AREA
Tejun Heoe74e3962009-03-30 19:07:44 +090031 def_bool PPC64
32
Tejun Heoc2a7e812009-08-14 15:00:53 +090033config NEED_PER_CPU_EMBED_FIRST_CHUNK
travis@sgi.comb32ef632008-01-30 13:32:51 +010034 def_bool PPC64
35
Michael Ellerman551b81f2009-10-13 19:44:44 +000036config NR_IRQS
37 int "Number of virtual interrupt numbers"
Anton Blanchard859aefc2010-01-31 01:14:03 +000038 range 32 32768
Michael Ellerman551b81f2009-10-13 19:44:44 +000039 default "512"
40 help
41 This defines the number of virtual interrupt numbers the kernel
42 can manage. Virtual interrupt numbers are what you see in
43 /proc/interrupts. If you configure your system to have too few,
44 drivers will fail to load or worse - handle with care.
45
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100046config STACKTRACE_SUPPORT
47 bool
48 default y
49
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100050config TRACE_IRQFLAGS_SUPPORT
51 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100052 default y
53
54config LOCKDEP_SUPPORT
55 bool
56 default y
57
Paul Mackerras14cf11a2005-09-26 16:04:21 +100058config RWSEM_GENERIC_SPINLOCK
59 bool
60
61config RWSEM_XCHGADD_ALGORITHM
62 bool
63 default y
64
Nick Piggin95c354f2008-01-30 13:31:20 +010065config GENERIC_LOCKBREAK
66 bool
67 default y
68 depends on SMP && PREEMPT
69
David Howellsf0d1b0b2006-12-08 02:37:49 -080070config ARCH_HAS_ILOG2_U32
71 bool
David Howellsef55d532006-12-08 02:37:53 -080072 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080073
74config ARCH_HAS_ILOG2_U64
75 bool
David Howellsef55d532006-12-08 02:37:53 -080076 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080077
Akinobu Mitae779b2f2006-03-26 01:39:33 -080078config GENERIC_HWEIGHT
79 bool
80 default y
81
Benjamin Herrenschmidt817820b2015-06-24 15:25:31 +100082config ARCH_HAS_DMA_SET_COHERENT_MASK
83 bool
84
Paul Mackerras14cf11a2005-09-26 16:04:21 +100085config PPC
86 bool
87 default y
Mark Salterb7e7c372013-10-07 22:15:32 -040088 select ARCH_MIGHT_HAVE_PC_PARPORT
Mark Salterc74e6d32014-01-01 11:32:26 -080089 select ARCH_MIGHT_HAVE_PC_SERIO
Stephen Rothwelld812c0e12013-03-06 18:11:51 +000090 select BINFMT_ELF
Kees Cook2b68f6c2015-04-14 15:48:00 -070091 select ARCH_HAS_ELF_RANDOMIZE
Stephen Rothwell10f85f42010-06-29 12:43:34 +100092 select OF
Stephen Neuendorffere6ce1322010-11-18 15:54:56 -080093 select OF_EARLY_FLATTREE
Marek Szyprowski708b7ee2014-02-28 14:42:56 +010094 select OF_RESERVED_MEM
Steven Rostedt2b79d692009-01-06 18:49:17 +000095 select HAVE_FTRACE_MCOUNT_RECORD
96 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -040097 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -050098 select HAVE_FUNCTION_GRAPH_TRACER
Catalin Marinas7ac57a82012-10-08 16:28:16 -070099 select SYSCTL_EXCEPTION_TRACE
Michael Buesch7444a722008-07-25 01:46:11 -0700100 select ARCH_WANT_OPTIONAL_GPIOLIB
Stephen Rothwell4febd952013-03-07 15:48:16 +1100101 select VIRT_TO_BUS if !PPC64
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100102 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700103 select HAVE_IOREMAP_PROT
Anton Blanchard0b5e6662013-09-23 12:05:12 +1000104 select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500105 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500106 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800107 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000108 select HAVE_ARCH_TRACEHOOK
Yinghai Lu95f72d12010-07-12 14:36:09 +1000109 select HAVE_MEMBLOCK
Tejun Heo1d7cfe12011-12-08 10:22:08 -0800110 select HAVE_MEMBLOCK_NODE_MAP
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000111 select HAVE_DMA_API_DEBUG
Steven Rostedt4e491d12008-05-14 23:49:44 -0400112 select HAVE_OPROFILE
Catalin Marinasb69ec422012-10-08 16:28:11 -0700113 select HAVE_DEBUG_KMEMLEAK
Laura Abbott308c09f2014-08-08 14:23:25 -0700114 select ARCH_HAS_SG_CHAIN
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000115 select GENERIC_ATOMIC64 if PPC32
Catalin Marinas74634492012-07-30 14:41:09 -0700116 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200117 select HAVE_PERF_EVENTS
Mahesh Salgaonkar359e4282010-04-07 18:10:20 +1000118 select HAVE_REGS_AND_STACK_ACCESS_API
K.Prasad5aae8a52010-06-15 11:35:19 +0530119 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
Will Deaconc1d7e012012-07-30 14:42:46 -0700120 select ARCH_WANT_IPC_PARSE_VERSION
Grant Likelyad5b7f132012-01-30 08:02:19 +0000121 select SPARSE_IRQ
Grant Likelycc79ca62012-02-16 01:37:49 -0700122 select IRQ_DOMAIN
Thomas Gleixner433c9c62011-03-25 17:04:59 +0100123 select GENERIC_IRQ_SHOW
124 select GENERIC_IRQ_SHOW_LEVEL
Thomas Gleixnere8d2c472011-10-05 02:30:51 +0000125 select IRQ_FORCED_THREADING
Peter Zijlstra26723912011-05-24 17:12:00 -0700126 select HAVE_RCU_TABLE_FREE if SMP
Ian Munsie02424d82011-02-02 17:27:24 +0000127 select HAVE_SYSCALL_TRACEPOINTS
Denis Kirjanoveb84bab2015-02-17 10:04:43 +0300128 select HAVE_BPF_JIT
Michael Ellermanac5f89c2011-06-29 19:16:59 +0000129 select HAVE_ARCH_JUMP_LABEL
Huang Yingdf013ff2011-07-13 13:14:22 +0800130 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Riku Voipio957e3fa2014-12-12 16:57:44 -0800131 select ARCH_HAS_GCOV_PROFILE_ALL
Thomas Gleixner17e32ea2012-04-20 13:05:48 +0000132 select GENERIC_SMP_IDLE_THREAD
Anna-Maria Gleixnerb9ed27d2012-05-18 16:45:51 +0000133 select GENERIC_CMOS_UPDATE
John Stultz70639422012-09-04 15:34:21 -0400134 select GENERIC_TIME_VSYSCALL_OLD
Anna-Maria Gleixnerb9ed27d2012-05-18 16:45:51 +0000135 select GENERIC_CLOCKEVENTS
Preeti U Murthy0d948732014-02-26 05:39:06 +0530136 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
137 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
Paul Mackerras16293722012-05-28 13:03:47 +1000138 select GENERIC_STRNCPY_FROM_USER
139 select GENERIC_STRNLEN_USER
David Howells786d35d2012-09-28 14:31:03 +0930140 select HAVE_MOD_ARCH_SPECIFIC
141 select MODULES_USE_ELF_RELA
Al Viro0bcfe542012-10-26 23:08:25 -0400142 select CLONE_BACKWARDS
David Woodhousefe3955c2012-12-19 15:14:17 +0000143 select ARCH_USE_BUILTIN_BSWAP
Al Viro0980cae2012-12-25 16:23:09 -0500144 select OLD_SIGSUSPEND
Al Viro09a4d5d2012-12-25 19:27:42 -0500145 select OLD_SIGACTION if PPC32
Dave Hansend1a1dc02013-07-01 13:04:42 -0700146 select HAVE_DEBUG_STACKOVERFLOW
Frederic Weisbecker62d26c82013-09-24 17:18:36 +0200147 select HAVE_IRQ_EXIT_ON_IRQ_STACK
Michael Ellerman3405d232014-01-15 18:14:28 +1100148 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
AKASHI Takahiro7a017722014-02-25 18:16:24 +0900149 select HAVE_ARCH_AUDITSYSCALL
Peter Zijlstra4badad32014-06-06 19:53:16 +0200150 select ARCH_SUPPORTS_ATOMIC_RMW
Anton Blancharda75c3802014-09-19 09:40:21 +1000151 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
Anton Blanchard10239732014-09-17 22:15:33 +1000152 select NO_BOOTMEM
Aneesh Kumar K.Vb30e7592014-11-05 21:57:41 +0530153 select HAVE_GENERIC_RCU_GUP
Anton Blanchardc54b2bf2015-04-09 12:52:56 +1000154 select HAVE_PERF_EVENTS_NMI if PPC64
Borislav Petkovb01aec92015-05-21 19:59:31 +0200155 select EDAC_SUPPORT
156 select EDAC_ATOMIC_SCRUB
Benjamin Herrenschmidt817820b2015-06-24 15:25:31 +1000157 select ARCH_HAS_DMA_SET_COHERENT_MASK
Dan Williams21266be2015-11-19 18:19:29 -0800158 select ARCH_HAS_DEVMEM_IS_ALLOWED
Michael Ellerman2449acc2015-07-23 20:21:09 +1000159 select HAVE_ARCH_SECCOMP_FILTER
Daniel Axtensbf76f732016-01-20 15:00:58 -0800160 select ARCH_HAS_UBSAN_SANITIZE_ALL
Li Zhang7f2bd002016-03-17 14:20:19 -0700161 select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000162
Anton Blanchard7a332b02013-09-23 12:04:51 +1000163config GENERIC_CSUM
164 def_bool CPU_LITTLE_ENDIAN
165
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000166config EARLY_PRINTK
167 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100168 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000169
Jason Baronb71d47c2013-11-25 23:23:11 +0000170config PANIC_TIMEOUT
171 int
172 default 180
173
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000174config COMPAT
175 bool
176 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800177 select COMPAT_BINFMT_ELF
Chris Metcalf48b25c42012-03-15 13:13:38 -0400178 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro09a4d5d2012-12-25 19:27:42 -0500179 select COMPAT_OLD_SIGACTION
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000180
181config SYSVIPC_COMPAT
182 bool
183 depends on COMPAT && SYSVIPC
184 default y
185
186# All PPC32s use generic nvram driver through ppc_md
187config GENERIC_NVRAM
188 bool
189 default y if PPC32
190
Ingo Molnarae1e9132008-11-11 09:05:16 +0100191config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000192 bool
193 default y
194
195config ARCH_MAY_HAVE_PC_FDC
196 bool
Pranith Kumar3484a312014-08-18 17:13:41 -0400197 default PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000198
Kumar Gala08264cb2006-01-10 21:43:56 -0600199config PPC_UDBG_16550
200 bool
201 default n
202
Kumar Gala08264cb2006-01-10 21:43:56 -0600203config GENERIC_TBSYNC
204 bool
205 default y if PPC32 && SMP
206 default n
207
Al Viroe65e1fc2006-09-12 03:04:40 -0400208config AUDIT_ARCH
209 bool
210 default y
211
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800212config GENERIC_BUG
213 bool
214 default y
215 depends on BUG
216
Johannes Bergb3028872007-03-20 05:18:02 +1100217config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500218 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100219 bool
220
David Gibson6c5b59b2011-04-14 18:29:16 +0000221config EPAPR_BOOT
222 bool
223 help
224 Used to allow a board to specify it wants an ePAPR compliant wrapper.
225 default n
226
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600227config DEFAULT_UIMAGE
228 bool
229 help
230 Used to allow a board to specify it wants a uImage built by default
231 default n
232
Johannes Berg801e4062007-12-08 02:12:39 +0100233config ARCH_HIBERNATION_POSSIBLE
234 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000235 default y
236
Johannes Bergf4cb5702007-12-08 02:14:00 +0100237config ARCH_SUSPEND_POSSIBLE
238 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400239 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
Zhao Chenhuid0832a72012-07-20 20:42:36 +0800240 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
241 || 44x || 40x
Johannes Bergf4cb5702007-12-08 02:14:00 +0100242
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100243config PPC_DCR_NATIVE
244 bool
245 default n
246
247config PPC_DCR_MMIO
248 bool
249 default n
250
251config PPC_DCR
252 bool
253 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
254 default y
255
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100256config PPC_OF_PLATFORM_PCI
257 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100258 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100259 depends on PPC64 # not supported on 32 bits yet
260 default n
261
Akinobu Mita6a11f752009-03-31 15:23:17 -0700262config ARCH_SUPPORTS_DEBUG_PAGEALLOC
Kim Phillipsce614c32015-01-26 13:22:22 -0600263 depends on PPC32 || PPC_STD_MMU_64
Akinobu Mita6a11f752009-03-31 15:23:17 -0700264 def_bool y
265
Ananth N Mavinakayanahalli8b7b80b2012-08-23 21:31:32 +0000266config ARCH_SUPPORTS_UPROBES
267 def_bool y
268
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000269config PPC_ADV_DEBUG_REGS
270 bool
271 depends on 40x || BOOKE
272 default y
273
274config PPC_ADV_DEBUG_IACS
275 int
276 depends on PPC_ADV_DEBUG_REGS
277 default 4 if 44x
278 default 2
279
280config PPC_ADV_DEBUG_DACS
281 int
282 depends on PPC_ADV_DEBUG_REGS
283 default 2
284
285config PPC_ADV_DEBUG_DVCS
286 int
287 depends on PPC_ADV_DEBUG_REGS
288 default 2 if 44x
289 default 0
290
291config PPC_ADV_DEBUG_DAC_RANGE
292 bool
293 depends on PPC_ADV_DEBUG_REGS && 44x
294 default y
295
Suzuki K. Poulose5e249d42013-01-07 00:26:57 +0000296config PPC_EMULATE_SSTEP
297 bool
298 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
299
Scott Wood1c980252014-08-08 18:40:42 -0500300config ZONE_DMA32
301 bool
302 default y if PPC64
303
Kirill A. Shutemov06ef42a2015-04-14 15:45:57 -0700304config PGTABLE_LEVELS
305 int
306 default 2 if !PPC64
307 default 3 if PPC_64K_PAGES
308 default 4
309
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000310source "init/Kconfig"
311
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700312source "kernel/Kconfig.freezer"
313
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100314source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500315source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000316
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000317menu "Kernel options"
318
319config HIGHMEM
320 bool "High memory support"
321 depends on PPC32
322
323source kernel/Kconfig.hz
324source kernel/Kconfig.preempt
325source "fs/Kconfig.binfmt"
326
Mel Gormanba72cb82007-11-28 16:21:13 -0800327config HUGETLB_PAGE_SIZE_VARIABLE
328 bool
329 depends on HUGETLB_PAGE
330 default y
331
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000332config MATH_EMULATION
333 bool "Math emulation"
Benjamin Herrenschmidt4e63f8e2013-06-09 17:01:24 +1000334 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000335 ---help---
336 Some PowerPC chips designed for embedded applications do not have
337 a floating-point unit and therefore do not implement the
338 floating-point instructions in the PowerPC instruction set. If you
339 say Y here, the kernel will include code to emulate a floating-point
340 unit, which will allow programs that use floating-point
341 instructions to run.
342
Benjamin Herrenschmidt4e63f8e2013-06-09 17:01:24 +1000343 This is also useful to emulate missing (optional) instructions
344 such as fsqrt on cores that do have an FPU but do not implement
345 them (such as Freescale BookE).
346
Kevin Haoe05c0e82013-07-16 19:57:15 +0800347choice
348 prompt "Math emulation options"
349 default MATH_EMULATION_FULL
350 depends on MATH_EMULATION
351
352config MATH_EMULATION_FULL
353 bool "Emulate all the floating point instructions"
354 ---help---
355 Select this option will enable the kernel to support to emulate
356 all the floating point instructions. If your SoC doesn't have
357 a FPU, you should select this.
358
359config MATH_EMULATION_HW_UNIMPLEMENTED
360 bool "Just emulate the FPU unimplemented instructions"
361 ---help---
362 Select this if you know there does have a hardware FPU on your
363 SoC, but some floating point instructions are not implemented by that.
364
365endchoice
366
Michael Neuling3d72bbc2013-02-13 16:21:43 +0000367config PPC_TRANSACTIONAL_MEM
368 bool "Transactional Memory support for POWERPC"
369 depends on PPC_BOOK3S_64
370 depends on SMP
Michael Neuling7b37a122014-01-08 21:25:31 +1100371 select ALTIVEC
372 select VSX
Michael Neuling3d72bbc2013-02-13 16:21:43 +0000373 default n
374 ---help---
375 Support user-mode Transactional Memory on POWERPC.
376
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800377config IOMMU_HELPER
378 def_bool PPC64
379
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000380config SWIOTLB
381 bool "SWIOTLB support"
382 default n
383 select IOMMU_HELPER
384 ---help---
385 Support for IO bounce buffering for systems without an IOMMU.
386 This allows us to DMA to the full physical address space on
387 platforms where the size of a physical address is larger
388 than the bus address. Not all platforms support this.
389
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000390config HOTPLUG_CPU
391 bool "Support for enabling/disabling CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +1000392 depends on SMP && (PPC_PSERIES || \
Zhao Chenhuid0832a72012-07-20 20:42:36 +0800393 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000394 ---help---
395 Say Y here to be able to disable and re-enable individual
396 CPUs at runtime on SMP machines.
397
398 Say N if you are unsure.
399
Nathan Fontenot12633e82009-11-25 17:23:25 +0000400config ARCH_CPU_PROBE_RELEASE
401 def_bool y
402 depends on HOTPLUG_CPU
403
Yasunori Gotocc576372006-06-29 02:24:27 -0700404config ARCH_ENABLE_MEMORY_HOTPLUG
405 def_bool y
406
Badari Pulavartya99824f2008-02-05 00:10:18 -0800407config ARCH_HAS_WALK_MEMORY
408 def_bool y
409
Badari Pulavarty14824712008-02-05 00:10:17 -0800410config ARCH_ENABLE_MEMORY_HOTREMOVE
411 def_bool y
412
Mahesh Salgaonkarf2296a32013-11-15 09:50:50 +0530413config PPC64_SUPPORTS_MEMORY_FAILURE
414 bool "Add support for memory hwpoison"
415 depends on PPC_BOOK3S_64
416 default "y" if PPC_POWERNV
417 select ARCH_SUPPORTS_MEMORY_FAILURE
418
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000419config KEXEC
Kees Cook642e56f2013-01-16 18:53:25 -0800420 bool "kexec system call"
Tiejun Chen96eea642015-10-06 22:48:22 -0500421 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E
Dave Young2965faa2015-09-09 15:38:55 -0700422 select KEXEC_CORE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000423 help
424 kexec is a system call that implements the ability to shutdown your
425 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400426 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000427 you can start any kernel with it, not just Linux.
428
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400429 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000430
431 It is an ongoing process to be certain the hardware in a machine
432 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +0200433 initially work for you. As of this writing the exact hardware
434 interface is strongly in flux, so no good recommendation can be
435 made.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000436
Haren Mynenie8625d462006-01-14 13:48:25 -0800437config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000438 bool "Build a kdump crash kernel"
Suzuki Poulose47da4212012-04-15 22:27:35 +0000439 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
Guenter Roeckfb43e842014-06-30 11:45:30 -0700440 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
Haren Mynenie8625d462006-01-14 13:48:25 -0800441 help
442 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000443 The same kernel binary can be used as production kernel and dump
444 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800445
Mahesh Salgaonkareb39c882012-02-16 01:14:22 +0000446config FA_DUMP
447 bool "Firmware-assisted dump"
Michael Ellerman90890b12013-10-28 15:00:35 +1100448 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
Manish Ahuja242f2712008-03-22 10:50:50 +1100449 help
Mahesh Salgaonkareb39c882012-02-16 01:14:22 +0000450 A robust mechanism to get reliable kernel crash dump with
451 assistance from firmware. This approach does not use kexec,
452 instead firmware assists in booting the kdump kernel
453 while preserving memory contents. Firmware-assisted dump
454 is meant to be a kdump replacement offering robustness and
455 speed not possible without system firmware assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100456
457 If unsure, say "N"
458
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000459config IRQ_ALL_CPUS
460 bool "Distribute interrupts on all CPUs by default"
Paul Bolle6cf09b92013-05-15 11:21:01 +0200461 depends on SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000462 help
463 This option gives the kernel permission to distribute IRQs across
464 multiple CPUs. Saying N here will route all IRQs to the first
465 CPU. Generally saying Y is safe, although some problems have been
466 reported with SMP Power Macintoshes with this option enabled.
467
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700468config NUMA
469 bool "NUMA support"
470 depends on PPC64
471 default y if SMP && PPC_PSERIES
472
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700473config NODES_SHIFT
474 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000475 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700476 default "4"
477 depends on NEED_MULTIPLE_NODES
478
Nishanth Aravamudan8c272262014-05-19 11:14:23 -0700479config USE_PERCPU_NUMA_NODE_ID
480 def_bool y
481 depends on NUMA
482
Nishanth Aravamudan64bb80d2014-05-16 16:41:20 -0700483config HAVE_MEMORYLESS_NODES
484 def_bool y
485 depends on NUMA
486
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000487config ARCH_SELECT_MEMORY_MODEL
488 def_bool y
489 depends on PPC64
490
491config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000492 def_bool y
493 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000494
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000495config ARCH_SPARSEMEM_ENABLE
496 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000497 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700498 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100499
500config ARCH_SPARSEMEM_DEFAULT
501 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100502 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000503
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100504config SYS_SUPPORTS_HUGETLBFS
Becky Bruce41151e72011-06-28 09:54:48 +0000505 bool
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100506
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700507source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000508
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800509config ARCH_MEMORY_PROBE
510 def_bool y
511 depends on MEMORY_HOTPLUG
512
Andy Whitcroft75167952006-10-21 10:24:14 -0700513# Some NUMA nodes have memory ranges that span
514# other nodes. Even though a pfn is valid and
515# between a node's start and end pfns, it may not
516# reside on that node. See memmap_init_zone()
517# for details.
518config NODES_SPAN_OTHER_NODES
519 def_bool y
520 depends on NEED_MULTIPLE_NODES
521
Yuri Tikhonove1240122009-01-29 01:40:44 +0000522config STDBINUTILS
523 bool "Using standard binutils settings"
524 depends on 44x
525 default y
526 help
527 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
528 Note, that kernel will be able to run only those applications,
529 which had been compiled using binutils later than 2.17.50.0.3 with
530 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
531 the older binutils, you can patch them with a trivial patch, which
532 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
533
Ilya Yanokca9153a2008-12-11 04:55:41 +0300534choice
535 prompt "Page size"
536 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100537 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300538 Select the kernel logical page size. Increasing the page size
539 will reduce software overhead at each page boundary, allow
540 hardware prefetch mechanisms to be more effective, and allow
541 larger dma transfers increasing IO efficiency and reducing
542 overhead. However the utilization of memory will increase.
543 For example, each cached file will using a multiple of the
544 page size to hold its contents and the difference between the
545 end of file and the end of page is wasted.
546
547 Some dedicated systems, such as software raid serving with
548 accelerated calculations, have shown significant increases.
549
550 If you configure a 64 bit kernel for 64k pages but the
551 processor does not support them, then the kernel will simulate
552 them with 4k pages, loading them on demand, but with the
553 reduced software overhead and larger internal fragmentation.
554 For the 32 bit kernel, a large page option will not be offered
555 unless it is supported by the configured processor.
556
557 If unsure, choose 4K_PAGES.
558
559config PPC_4K_PAGES
560 bool "4k page size"
Aneesh Kumar K.V19f97c92016-01-29 22:32:49 +0530561 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300562
563config PPC_16K_PAGES
Michael Ellerman55f8b5b2015-08-07 16:19:46 +1000564 bool "16k page size"
565 depends on 44x || PPC_8xx
Ilya Yanokca9153a2008-12-11 04:55:41 +0300566
567config PPC_64K_PAGES
Michael Ellerman55f8b5b2015-08-07 16:19:46 +1000568 bool "64k page size"
569 depends on !PPC_FSL_BOOK3E && (44x || PPC_STD_MMU_64 || PPC_BOOK3E_64)
Aneesh Kumar K.V19f97c92016-01-29 22:32:49 +0530570 select HAVE_ARCH_SOFT_DIRTY if PPC_BOOK3S_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300571
Yuri Tikhonove1240122009-01-29 01:40:44 +0000572config PPC_256K_PAGES
Michael Ellerman55f8b5b2015-08-07 16:19:46 +1000573 bool "256k page size"
574 depends on 44x && !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000575 help
576 Make the page size 256k.
577
578 As the ELF standard only requires alignment to support page
579 sizes up to 64k, you will need to compile all of your user
580 space applications with a non-standard binutils settings
581 (see the STDBINUTILS description for details).
582
583 Say N unless you know what you are doing.
584
Ilya Yanokca9153a2008-12-11 04:55:41 +0300585endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100586
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000587config FORCE_MAX_ZONEORDER
588 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000589 range 9 64 if PPC64 && PPC_64K_PAGES
590 default "9" if PPC64 && PPC_64K_PAGES
591 range 13 64 if PPC64 && !PPC_64K_PAGES
592 default "13" if PPC64 && !PPC_64K_PAGES
593 range 9 64 if PPC32 && PPC_16K_PAGES
594 default "9" if PPC32 && PPC_16K_PAGES
595 range 7 64 if PPC32 && PPC_64K_PAGES
596 default "7" if PPC32 && PPC_64K_PAGES
597 range 5 64 if PPC32 && PPC_256K_PAGES
598 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000599 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000600 default "11"
601 help
602 The kernel memory allocator divides physically contiguous memory
603 blocks into "zones", where each zone is a power of two number of
604 pages. This option selects the largest power of two that the kernel
605 keeps in the memory allocator. If you need to allocate very large
606 blocks of physically contiguous memory, then you may need to
607 increase this value.
608
609 This config option is actually maximum order plus one. For example,
610 a value of 11 means that the largest free memory block is 2^10 pages.
611
612 The page size is not necessarily 4KB. For example, on 64-bit
613 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
614 this in mind when choosing a value for this option.
615
Paul Mackerrasfa282372008-01-24 08:35:13 +1100616config PPC_SUBPAGE_PROT
617 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300618 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100619 help
620 This option adds support for a system call to allow user programs
621 to set access permissions (read/write, readonly, or no access)
622 on the 4k subpages of each 64k page.
623
Ian Munsiee83d0162014-10-08 19:54:50 +1100624config PPC_COPRO_BASE
625 bool
626 default n
627
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000628config SCHED_SMT
629 bool "SMT (Hyperthreading) scheduler support"
630 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000631 help
632 SMT scheduler support improves the CPU scheduler's decision making
633 when dealing with POWER5 cpus at a cost of slightly increased
634 overhead in some places. If unsure say N here.
635
Michael Neulingb92a66a2012-09-10 00:35:26 +0000636config PPC_DENORMALISATION
637 bool "PowerPC denormalisation exception handling"
638 depends on PPC_BOOK3S_64
Anton Blanchard4e90a2a2013-07-31 16:31:26 +1000639 default "y" if PPC_POWERNV
Michael Neulingb92a66a2012-09-10 00:35:26 +0000640 ---help---
641 Add support for handling denormalisation of single precision
642 values. Useful for bare metal only. If unsure say Y here.
643
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000644config CMDLINE_BOOL
645 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000646
647config CMDLINE
648 string "Initial kernel command string"
649 depends on CMDLINE_BOOL
650 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
651 help
652 On some platforms, there is currently no way for the boot loader to
653 pass arguments to the kernel. For these platforms, you can supply
654 some command-line options at build time by entering them here. In
655 most cases you will need to specify the root device here.
656
Sebastian Siewioreb3b80f2014-02-20 21:48:17 +0100657config CMDLINE_FORCE
658 bool "Always use the default kernel command string"
659 depends on CMDLINE_BOOL
660 help
661 Always use the default kernel command string, even if the boot
662 loader passes other arguments to the kernel.
663 This is useful if you cannot or don't want to change the
664 command-line options your boot loader passes to the kernel.
665
Grant Likelyc356aa42008-07-09 09:41:52 -0600666config EXTRA_TARGETS
667 string "Additional default image types"
668 help
669 List additional targets to be built by the bootwrapper here (separated
670 by spaces). This is useful for targets that depend of device tree
671 files in the .dts directory.
672
673 Targets in this list will be build as part of the default build
674 target, or when the user does a 'make zImage' or a
675 'make zImage.initrd'.
676
677 If unsure, leave blank
678
Johannes Bergb28f5082008-01-15 23:17:00 -0500679config ARCH_WANTS_FREEZER_CONTROL
680 def_bool y
681 depends on ADB_PMU
682
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000683source kernel/power/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000684
685config SECCOMP
686 bool "Enable seccomp to safely compute untrusted bytecode"
687 depends on PROC_FS
688 default y
689 help
690 This kernel feature is useful for number crunching applications
691 that may need to compute untrusted bytecode during their
692 execution. By using pipes or other transports made available to
693 the process as file descriptors supporting the read/write
694 syscalls, it's possible to isolate those applications in
695 their own address space using seccomp. Once seccomp is
696 enabled via /proc/<pid>/seccomp, it cannot be disabled
697 and the task is only allowed to execute a few safe syscalls
698 defined by each seccomp mode.
699
700 If unsure, say Y. Only embedded should say N here.
701
702endmenu
703
704config ISA_DMA_API
705 bool
Stephen Rothwell3d066d72012-02-22 14:10:12 +0000706 default PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000707
708menu "Bus options"
709
710config ISA
711 bool "Support for ISA-bus hardware"
Paul Bolle933ee712013-03-27 00:47:03 +0000712 depends on PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000713 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000714 help
715 Find out whether you have ISA slots on your motherboard. ISA is the
716 name of a bus system, i.e. the way the CPU talks to the other stuff
717 inside your box. If you have an Apple machine, say N here; if you
Paul Bolle933ee712013-03-27 00:47:03 +0000718 have an IBM RS/6000 or pSeries machine, say Y. If you have an
719 embedded board, consult your board documentation.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000720
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800721config ZONE_DMA
722 bool
723 default y
724
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800725config NEED_DMA_MAP_STATE
726 def_bool (PPC64 || NOT_COHERENT_CACHE)
727
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700728config NEED_SG_DMA_LENGTH
729 def_bool y
730
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000731config GENERIC_ISA_DMA
732 bool
Anton Vorontsov19274452010-07-15 07:38:16 +0000733 depends on ISA_DMA_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000734 default y
735
Paul Mackerras25635c72005-10-26 16:36:55 +1000736config PPC_INDIRECT_PCI
737 bool
738 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600739 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000740 default n
741
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000742config EISA
743 bool
744
745config SBUS
746 bool
747
Kumar Gala08264cb2006-01-10 21:43:56 -0600748config FSL_SOC
749 bool
750
Roy Zang55c44992007-07-10 18:44:34 +0800751config FSL_PCI
752 bool
753 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600754 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800755
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400756config FSL_PMC
757 bool
758 default y
759 depends on SUSPEND && (PPC_85xx || PPC_86xx)
760 help
761 Freescale MPC85xx/MPC86xx power management controller support
762 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
763
Victor Gallardod164f6d2010-10-08 10:25:27 +0000764config PPC4xx_CPM
765 bool
766 default y
767 depends on SUSPEND && (44x || 40x)
768 help
769 PPC4xx Clock Power Management (CPM) support (suspend/resume).
770 It also enables support for two different idle states (idle-wait
771 and idle-doze).
772
Stefan Roese2a706912008-03-26 22:39:50 +1100773config 4xx_SOC
774 bool
775
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400776config FSL_LBC
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800777 bool "Freescale Local Bus support"
778 depends on FSL_SOC
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400779 help
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800780 Enables reporting of errors from the Freescale local bus
781 controller. Also contains some common code used by
782 drivers for specific local bus peripherals.
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400783
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400784config FSL_GTM
785 bool
786 depends on PPC_83xx || QUICC_ENGINE || CPM2
787 help
788 Freescale General-purpose Timers support
789
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000790# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
791config MCA
792 bool
793
John Rigbyb5005632008-06-26 11:07:56 -0600794# Platforms that what PCI turned unconditionally just do select PCI
795# in their config node. Platforms that want to choose at config
796# time should select PPC_PCI_CHOICE
797config PPC_PCI_CHOICE
798 bool
799
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000800config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600801 bool "PCI support" if PPC_PCI_CHOICE
802 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000803 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000804 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael S. Tsirkin335b8cf2011-11-24 21:06:41 +0200805 select GENERIC_PCI_IOMAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000806 help
807 Find out whether your system includes a PCI bus. PCI is the name of
808 a bus system, i.e. the way the CPU talks to the other stuff inside
809 your box. If you say Y here, the kernel will include drivers and
810 infrastructure code to support PCI bus devices.
811
812config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600813 def_bool PCI
814
815config PCI_SYSCALL
816 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000817
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000818config PCI_QSPAN
819 bool "QSpan PCI"
820 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000821 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000822 help
823 Say Y here if you have a system based on a Motorola 8xx-series
824 embedded processor with a QSPAN PCI interface, otherwise say N.
825
826config PCI_8260
827 bool
828 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000829 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000830 default y
831
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000832source "drivers/pci/Kconfig"
833
834source "drivers/pcmcia/Kconfig"
835
Zhang Weif1f389d2008-04-18 13:33:39 -0700836config HAS_RAPIDIO
837 bool
838 default n
839
840config RAPIDIO
Alexandre Bounine56abde72014-01-23 15:56:04 -0800841 tristate "RapidIO support"
Alexandre Bounine388b78a2011-03-23 16:43:03 -0700842 depends on HAS_RAPIDIO || PCI
Zhang Weif1f389d2008-04-18 13:33:39 -0700843 help
844 If you say Y here, the kernel will include drivers and
845 infrastructure code to support RapidIO interconnect devices.
846
Alexandre Bounine388b78a2011-03-23 16:43:03 -0700847config FSL_RIO
848 bool "Freescale Embedded SRIO Controller support"
Alexandre Bounine56abde72014-01-23 15:56:04 -0800849 depends on RAPIDIO = y && HAS_RAPIDIO
Alexandre Bounine388b78a2011-03-23 16:43:03 -0700850 default "n"
851 ---help---
852 Include support for RapidIO controller on Freescale embedded
853 processors (MPC8548, MPC8641, etc).
854
Zhang Weif1f389d2008-04-18 13:33:39 -0700855source "drivers/rapidio/Kconfig"
856
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000857endmenu
858
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000859config NONSTATIC_KERNEL
860 bool
861 default n
862
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000863menu "Advanced setup"
864 depends on PPC32
865
866config ADVANCED_OPTIONS
867 bool "Prompt for advanced kernel configuration options"
868 help
869 This option will enable prompting for a variety of advanced kernel
870 configuration options. These options can cause the kernel to not
871 work if they are set incorrectly, but can be used to optimize certain
872 aspects of kernel memory management.
873
874 Unless you know what you are doing, say N here.
875
876comment "Default settings for advanced configuration options are used"
877 depends on !ADVANCED_OPTIONS
878
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000879config LOWMEM_SIZE_BOOL
880 bool "Set maximum low memory"
881 depends on ADVANCED_OPTIONS
882 help
883 This option allows you to set the maximum amount of memory which
884 will be used as "low memory", that is, memory which the kernel can
885 access directly, without having to set up a kernel virtual mapping.
886 This can be useful in optimizing the layout of kernel virtual
887 memory.
888
889 Say N here unless you know what you are doing.
890
891config LOWMEM_SIZE
892 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
893 default "0x30000000"
894
Trent Piepho96051462008-12-08 19:34:58 -0800895config LOWMEM_CAM_NUM_BOOL
896 bool "Set number of CAMs to use to map low memory"
897 depends on ADVANCED_OPTIONS && FSL_BOOKE
898 help
899 This option allows you to set the maximum number of CAM slots that
900 will be used to map low memory. There are a limited number of slots
901 available and even more limited number that will fit in the L1 MMU.
902 However, using more entries will allow mapping more low memory. This
903 can be useful in optimizing the layout of kernel virtual memory.
904
905 Say N here unless you know what you are doing.
906
907config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400908 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800909 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
910 default 3
911
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000912config DYNAMIC_MEMSTART
Kees Cook642e56f2013-01-16 18:53:25 -0800913 bool "Enable page aligned dynamic load address for kernel"
914 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000915 select NONSTATIC_KERNEL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000916 help
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000917 This option enables the kernel to be loaded at any page aligned
918 physical address. The kernel creates a mapping from KERNELBASE to
919 the address where the kernel is loaded. The page size here implies
920 the TLB page size of the mapping for kernel on the particular platform.
921 Please refer to the init code for finding the TLB page size.
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000922
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000923 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
924 kernel image, where the only restriction is the page aligned kernel
925 load address. When this option is enabled, the compile time physical
926 address CONFIG_PHYSICAL_START is ignored.
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000927
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000928 This option is overridden by CONFIG_RELOCATABLE
929
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000930config RELOCATABLE
Kees Cook642e56f2013-01-16 18:53:25 -0800931 bool "Build a relocatable kernel"
Kevin Haodd189692013-12-24 15:12:06 +0800932 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000933 select NONSTATIC_KERNEL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000934 help
935 This builds a kernel image that is capable of running at the
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000936 location the kernel is loaded at, without any alignment restrictions.
937 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000938
939 One use is for the kexec on panic case where the recovery kernel
940 must live at a different physical address than the primary
941 kernel.
942
943 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
944 it has been loaded at and the compile time physical addresses
945 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
946 setting can still be useful to bootwrappers that need to know the
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000947 load address of the kernel (eg. u-boot/mkimage).
948
949config RELOCATABLE_PPC32
950 def_bool y
951 depends on PPC32 && RELOCATABLE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000952
953config PAGE_OFFSET_BOOL
954 bool "Set custom page offset address"
955 depends on ADVANCED_OPTIONS
956 help
957 This option allows you to set the kernel virtual address at which
958 the kernel will map low memory. This can be useful in optimizing
959 the virtual memory layout of the system.
960
961 Say N here unless you know what you are doing.
962
963config PAGE_OFFSET
964 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
965 default "0xc0000000"
966
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000967config KERNEL_START_BOOL
968 bool "Set custom kernel base address"
969 depends on ADVANCED_OPTIONS
970 help
971 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000972 the kernel will be loaded. Normally this should match PAGE_OFFSET
973 however there are times (like kdump) that one might not want them
974 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000975
976 Say N here unless you know what you are doing.
977
978config KERNEL_START
979 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000980 default PAGE_OFFSET if PAGE_OFFSET_BOOL
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000981 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000982 default "0xc0000000"
983
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000984config PHYSICAL_START_BOOL
985 bool "Set physical address where the kernel is loaded"
986 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
987 help
988 This gives the physical address where the kernel is loaded.
989
990 Say N here unless you know what you are doing.
991
992config PHYSICAL_START
993 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000994 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000995 default "0x00000000"
996
997config PHYSICAL_ALIGN
998 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800999 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001000 help
1001 This value puts the alignment restrictions on physical address
1002 where kernel is loaded and run from. Kernel is compiled for an
1003 address which meets above alignment restriction.
1004
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001005config TASK_SIZE_BOOL
1006 bool "Set custom user task size"
1007 depends on ADVANCED_OPTIONS
1008 help
1009 This option allows you to set the amount of virtual address space
1010 allocated to user tasks. This can be useful in optimizing the
1011 virtual memory layout of the system.
1012
1013 Say N here unless you know what you are doing.
1014
1015config TASK_SIZE
1016 hex "Size of user task space" if TASK_SIZE_BOOL
Paul Bolle933ee712013-03-27 00:47:03 +00001017 default "0x80000000" if PPC_8xx
Kumar Gala4d9e55102007-10-11 13:40:21 -05001018 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001019
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +10001020config CONSISTENT_SIZE_BOOL
1021 bool "Set custom consistent memory pool size"
1022 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1023 help
1024 This option allows you to set the size of the
1025 consistent memory pool. This pool of virtual memory
1026 is used to make consistent memory allocations.
1027
1028config CONSISTENT_SIZE
1029 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1030 default "0x00200000" if NOT_COHERENT_CACHE
1031
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001032config PIN_TLB
1033 bool "Pinned Kernel TLBs (860 ONLY)"
1034 depends on ADVANCED_OPTIONS && 8xx
1035endmenu
1036
Stephen Rothwellcabb5582005-09-30 16:16:52 +10001037if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +10001038config RELOCATABLE
1039 bool "Build a relocatable kernel"
Guenter Roeckfb43e842014-06-30 11:45:30 -07001040 depends on !COMPILE_TEST
Suzuki Poulose0f890c82011-12-14 22:57:15 +00001041 select NONSTATIC_KERNEL
Paul Mackerras549e8152008-08-30 11:43:47 +10001042 help
1043 This builds a kernel image that is capable of running anywhere
1044 in the RMA (real memory area) at any 16k-aligned base address.
1045 The kernel is linked as a position-independent executable (PIE)
1046 and contains dynamic relocations which are processed early
1047 in the bootup process.
1048
1049 One use is for the kexec on panic case where the recovery kernel
1050 must live at a different physical address than the primary
1051 kernel.
1052
Paul Mackerrasbdbc29c2013-08-27 16:07:49 +10001053# This value must have zeroes in the bottom 60 bits otherwise lots will break
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001054config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +10001055 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +10001056 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001057config KERNEL_START
1058 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001059 default "0xc000000000000000"
1060config PHYSICAL_START
1061 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001062 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +10001063endif
1064
Michael Ellermana4da0d52013-10-11 14:07:57 +11001065config ARCH_RANDOM
1066 def_bool n
1067
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001068source "net/Kconfig"
1069
1070source "drivers/Kconfig"
1071
1072source "fs/Kconfig"
1073
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001074source "lib/Kconfig"
1075
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001076source "arch/powerpc/Kconfig.debug"
1077
1078source "security/Kconfig"
1079
1080config KEYS_COMPAT
1081 bool
1082 depends on COMPAT && KEYS
1083 default y
1084
1085source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +10001086
Sylvain Munaut1088a202007-09-16 20:53:25 +10001087config PPC_LIB_RHEAP
1088 bool
1089
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -05001090source "arch/powerpc/kvm/Kconfig"