blob: 5ef27113b898c3bdbdf4d28880932880ab243677 [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
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100050config HAVE_LATENCYTOP_SUPPORT
51 def_bool y
52
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100053config TRACE_IRQFLAGS_SUPPORT
54 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100055 default y
56
57config LOCKDEP_SUPPORT
58 bool
59 default y
60
Paul Mackerras14cf11a2005-09-26 16:04:21 +100061config RWSEM_GENERIC_SPINLOCK
62 bool
63
64config RWSEM_XCHGADD_ALGORITHM
65 bool
66 default y
67
Nick Piggin95c354f2008-01-30 13:31:20 +010068config GENERIC_LOCKBREAK
69 bool
70 default y
71 depends on SMP && PREEMPT
72
David Howellsf0d1b0b2006-12-08 02:37:49 -080073config ARCH_HAS_ILOG2_U32
74 bool
David Howellsef55d532006-12-08 02:37:53 -080075 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080076
77config ARCH_HAS_ILOG2_U64
78 bool
David Howellsef55d532006-12-08 02:37:53 -080079 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080080
Akinobu Mitae779b2f2006-03-26 01:39:33 -080081config GENERIC_HWEIGHT
82 bool
83 default y
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 Tomonori46bab4e2009-08-04 19:08:26 +0000111 select HAVE_DMA_ATTRS
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000112 select HAVE_DMA_API_DEBUG
Steven Rostedt4e491d12008-05-14 23:49:44 -0400113 select HAVE_OPROFILE
Catalin Marinasb69ec422012-10-08 16:28:11 -0700114 select HAVE_DEBUG_KMEMLEAK
Laura Abbott308c09f2014-08-08 14:23:25 -0700115 select ARCH_HAS_SG_CHAIN
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000116 select GENERIC_ATOMIC64 if PPC32
Catalin Marinas74634492012-07-30 14:41:09 -0700117 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200118 select HAVE_PERF_EVENTS
Mahesh Salgaonkar359e4282010-04-07 18:10:20 +1000119 select HAVE_REGS_AND_STACK_ACCESS_API
K.Prasad5aae8a52010-06-15 11:35:19 +0530120 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
Will Deaconc1d7e012012-07-30 14:42:46 -0700121 select ARCH_WANT_IPC_PARSE_VERSION
Grant Likelyad5b7f132012-01-30 08:02:19 +0000122 select SPARSE_IRQ
Grant Likelycc79ca62012-02-16 01:37:49 -0700123 select IRQ_DOMAIN
Thomas Gleixner433c9c62011-03-25 17:04:59 +0100124 select GENERIC_IRQ_SHOW
125 select GENERIC_IRQ_SHOW_LEVEL
Thomas Gleixnere8d2c472011-10-05 02:30:51 +0000126 select IRQ_FORCED_THREADING
Peter Zijlstra26723912011-05-24 17:12:00 -0700127 select HAVE_RCU_TABLE_FREE if SMP
Ian Munsie02424d82011-02-02 17:27:24 +0000128 select HAVE_SYSCALL_TRACEPOINTS
Denis Kirjanoveb84bab2015-02-17 10:04:43 +0300129 select HAVE_BPF_JIT
Michael Ellermanac5f89c2011-06-29 19:16:59 +0000130 select HAVE_ARCH_JUMP_LABEL
Huang Yingdf013ff2011-07-13 13:14:22 +0800131 select ARCH_HAVE_NMI_SAFE_CMPXCHG
Riku Voipio957e3fa2014-12-12 16:57:44 -0800132 select ARCH_HAS_GCOV_PROFILE_ALL
Thomas Gleixner17e32ea2012-04-20 13:05:48 +0000133 select GENERIC_SMP_IDLE_THREAD
Anna-Maria Gleixnerb9ed27d2012-05-18 16:45:51 +0000134 select GENERIC_CMOS_UPDATE
John Stultz70639422012-09-04 15:34:21 -0400135 select GENERIC_TIME_VSYSCALL_OLD
Anna-Maria Gleixnerb9ed27d2012-05-18 16:45:51 +0000136 select GENERIC_CLOCKEVENTS
Preeti U Murthy0d948732014-02-26 05:39:06 +0530137 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
138 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
Paul Mackerras16293722012-05-28 13:03:47 +1000139 select GENERIC_STRNCPY_FROM_USER
140 select GENERIC_STRNLEN_USER
David Howells786d35d2012-09-28 14:31:03 +0930141 select HAVE_MOD_ARCH_SPECIFIC
142 select MODULES_USE_ELF_RELA
Al Viro0bcfe542012-10-26 23:08:25 -0400143 select CLONE_BACKWARDS
David Woodhousefe3955c2012-12-19 15:14:17 +0000144 select ARCH_USE_BUILTIN_BSWAP
Al Viro0980cae2012-12-25 16:23:09 -0500145 select OLD_SIGSUSPEND
Al Viro09a4d5d2012-12-25 19:27:42 -0500146 select OLD_SIGACTION if PPC32
Dave Hansend1a1dc02013-07-01 13:04:42 -0700147 select HAVE_DEBUG_STACKOVERFLOW
Frederic Weisbecker62d26c82013-09-24 17:18:36 +0200148 select HAVE_IRQ_EXIT_ON_IRQ_STACK
Michael Ellerman3405d232014-01-15 18:14:28 +1100149 select ARCH_USE_CMPXCHG_LOCKREF if PPC64
AKASHI Takahiro7a017722014-02-25 18:16:24 +0900150 select HAVE_ARCH_AUDITSYSCALL
Peter Zijlstra4badad32014-06-06 19:53:16 +0200151 select ARCH_SUPPORTS_ATOMIC_RMW
Anton Blancharda75c3802014-09-19 09:40:21 +1000152 select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
Anton Blanchard10239732014-09-17 22:15:33 +1000153 select NO_BOOTMEM
Aneesh Kumar K.Vb30e7592014-11-05 21:57:41 +0530154 select HAVE_GENERIC_RCU_GUP
Anton Blanchardc54b2bf2015-04-09 12:52:56 +1000155 select HAVE_PERF_EVENTS_NMI if PPC64
Borislav Petkovb01aec92015-05-21 19:59:31 +0200156 select EDAC_SUPPORT
157 select EDAC_ATOMIC_SCRUB
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000158
Anton Blanchard7a332b02013-09-23 12:04:51 +1000159config GENERIC_CSUM
160 def_bool CPU_LITTLE_ENDIAN
161
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000162config EARLY_PRINTK
163 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100164 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000165
Jason Baronb71d47c2013-11-25 23:23:11 +0000166config PANIC_TIMEOUT
167 int
168 default 180
169
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000170config COMPAT
171 bool
172 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800173 select COMPAT_BINFMT_ELF
Chris Metcalf48b25c42012-03-15 13:13:38 -0400174 select ARCH_WANT_OLD_COMPAT_IPC
Al Viro09a4d5d2012-12-25 19:27:42 -0500175 select COMPAT_OLD_SIGACTION
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000176
177config SYSVIPC_COMPAT
178 bool
179 depends on COMPAT && SYSVIPC
180 default y
181
182# All PPC32s use generic nvram driver through ppc_md
183config GENERIC_NVRAM
184 bool
185 default y if PPC32
186
Ingo Molnarae1e9132008-11-11 09:05:16 +0100187config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000188 bool
189 default y
190
191config ARCH_MAY_HAVE_PC_FDC
192 bool
Pranith Kumar3484a312014-08-18 17:13:41 -0400193 default PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000194
Kumar Gala08264cb2006-01-10 21:43:56 -0600195config PPC_UDBG_16550
196 bool
197 default n
198
Kumar Gala08264cb2006-01-10 21:43:56 -0600199config GENERIC_TBSYNC
200 bool
201 default y if PPC32 && SMP
202 default n
203
Al Viroe65e1fc2006-09-12 03:04:40 -0400204config AUDIT_ARCH
205 bool
206 default y
207
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800208config GENERIC_BUG
209 bool
210 default y
211 depends on BUG
212
Johannes Bergb3028872007-03-20 05:18:02 +1100213config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500214 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100215 bool
216
David Gibson6c5b59b2011-04-14 18:29:16 +0000217config EPAPR_BOOT
218 bool
219 help
220 Used to allow a board to specify it wants an ePAPR compliant wrapper.
221 default n
222
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600223config DEFAULT_UIMAGE
224 bool
225 help
226 Used to allow a board to specify it wants a uImage built by default
227 default n
228
Johannes Berg801e4062007-12-08 02:12:39 +0100229config ARCH_HIBERNATION_POSSIBLE
230 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000231 default y
232
Johannes Bergf4cb5702007-12-08 02:14:00 +0100233config ARCH_SUSPEND_POSSIBLE
234 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400235 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
Zhao Chenhuid0832a72012-07-20 20:42:36 +0800236 (PPC_85xx && !PPC_E500MC) || PPC_86xx || PPC_PSERIES \
237 || 44x || 40x
Johannes Bergf4cb5702007-12-08 02:14:00 +0100238
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100239config PPC_DCR_NATIVE
240 bool
241 default n
242
243config PPC_DCR_MMIO
244 bool
245 default n
246
247config PPC_DCR
248 bool
249 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
250 default y
251
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100252config PPC_OF_PLATFORM_PCI
253 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100254 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100255 depends on PPC64 # not supported on 32 bits yet
256 default n
257
Akinobu Mita6a11f752009-03-31 15:23:17 -0700258config ARCH_SUPPORTS_DEBUG_PAGEALLOC
Kim Phillipsce614c32015-01-26 13:22:22 -0600259 depends on PPC32 || PPC_STD_MMU_64
Akinobu Mita6a11f752009-03-31 15:23:17 -0700260 def_bool y
261
Ananth N Mavinakayanahalli8b7b80b2012-08-23 21:31:32 +0000262config ARCH_SUPPORTS_UPROBES
263 def_bool y
264
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000265config PPC_ADV_DEBUG_REGS
266 bool
267 depends on 40x || BOOKE
268 default y
269
270config PPC_ADV_DEBUG_IACS
271 int
272 depends on PPC_ADV_DEBUG_REGS
273 default 4 if 44x
274 default 2
275
276config PPC_ADV_DEBUG_DACS
277 int
278 depends on PPC_ADV_DEBUG_REGS
279 default 2
280
281config PPC_ADV_DEBUG_DVCS
282 int
283 depends on PPC_ADV_DEBUG_REGS
284 default 2 if 44x
285 default 0
286
287config PPC_ADV_DEBUG_DAC_RANGE
288 bool
289 depends on PPC_ADV_DEBUG_REGS && 44x
290 default y
291
Suzuki K. Poulose5e249d42013-01-07 00:26:57 +0000292config PPC_EMULATE_SSTEP
293 bool
294 default y if KPROBES || UPROBES || XMON || HAVE_HW_BREAKPOINT
295
Scott Wood1c980252014-08-08 18:40:42 -0500296config ZONE_DMA32
297 bool
298 default y if PPC64
299
Kirill A. Shutemov06ef42a2015-04-14 15:45:57 -0700300config PGTABLE_LEVELS
301 int
302 default 2 if !PPC64
303 default 3 if PPC_64K_PAGES
304 default 4
305
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000306source "init/Kconfig"
307
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700308source "kernel/Kconfig.freezer"
309
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100310source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500311source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000312
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000313menu "Kernel options"
314
315config HIGHMEM
316 bool "High memory support"
317 depends on PPC32
318
319source kernel/Kconfig.hz
320source kernel/Kconfig.preempt
321source "fs/Kconfig.binfmt"
322
Mel Gormanba72cb82007-11-28 16:21:13 -0800323config HUGETLB_PAGE_SIZE_VARIABLE
324 bool
325 depends on HUGETLB_PAGE
326 default y
327
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000328config MATH_EMULATION
329 bool "Math emulation"
Benjamin Herrenschmidt4e63f8e2013-06-09 17:01:24 +1000330 depends on 4xx || 8xx || PPC_MPC832x || BOOKE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000331 ---help---
332 Some PowerPC chips designed for embedded applications do not have
333 a floating-point unit and therefore do not implement the
334 floating-point instructions in the PowerPC instruction set. If you
335 say Y here, the kernel will include code to emulate a floating-point
336 unit, which will allow programs that use floating-point
337 instructions to run.
338
Benjamin Herrenschmidt4e63f8e2013-06-09 17:01:24 +1000339 This is also useful to emulate missing (optional) instructions
340 such as fsqrt on cores that do have an FPU but do not implement
341 them (such as Freescale BookE).
342
Kevin Haoe05c0e82013-07-16 19:57:15 +0800343choice
344 prompt "Math emulation options"
345 default MATH_EMULATION_FULL
346 depends on MATH_EMULATION
347
348config MATH_EMULATION_FULL
349 bool "Emulate all the floating point instructions"
350 ---help---
351 Select this option will enable the kernel to support to emulate
352 all the floating point instructions. If your SoC doesn't have
353 a FPU, you should select this.
354
355config MATH_EMULATION_HW_UNIMPLEMENTED
356 bool "Just emulate the FPU unimplemented instructions"
357 ---help---
358 Select this if you know there does have a hardware FPU on your
359 SoC, but some floating point instructions are not implemented by that.
360
361endchoice
362
Michael Neuling3d72bbc2013-02-13 16:21:43 +0000363config PPC_TRANSACTIONAL_MEM
364 bool "Transactional Memory support for POWERPC"
365 depends on PPC_BOOK3S_64
366 depends on SMP
Michael Neuling7b37a122014-01-08 21:25:31 +1100367 select ALTIVEC
368 select VSX
Michael Neuling3d72bbc2013-02-13 16:21:43 +0000369 default n
370 ---help---
371 Support user-mode Transactional Memory on POWERPC.
372
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800373config IOMMU_HELPER
374 def_bool PPC64
375
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000376config SWIOTLB
377 bool "SWIOTLB support"
378 default n
379 select IOMMU_HELPER
380 ---help---
381 Support for IO bounce buffering for systems without an IOMMU.
382 This allows us to DMA to the full physical address space on
383 platforms where the size of a physical address is larger
384 than the bus address. Not all platforms support this.
385
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000386config HOTPLUG_CPU
387 bool "Support for enabling/disabling CPUs"
Stephen Rothwell40b31362013-05-21 13:49:35 +1000388 depends on SMP && (PPC_PSERIES || \
Zhao Chenhuid0832a72012-07-20 20:42:36 +0800389 PPC_PMAC || PPC_POWERNV || (PPC_85xx && !PPC_E500MC))
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000390 ---help---
391 Say Y here to be able to disable and re-enable individual
392 CPUs at runtime on SMP machines.
393
394 Say N if you are unsure.
395
Nathan Fontenot12633e82009-11-25 17:23:25 +0000396config ARCH_CPU_PROBE_RELEASE
397 def_bool y
398 depends on HOTPLUG_CPU
399
Yasunori Gotocc576372006-06-29 02:24:27 -0700400config ARCH_ENABLE_MEMORY_HOTPLUG
401 def_bool y
402
Badari Pulavartya99824f2008-02-05 00:10:18 -0800403config ARCH_HAS_WALK_MEMORY
404 def_bool y
405
Badari Pulavarty14824712008-02-05 00:10:17 -0800406config ARCH_ENABLE_MEMORY_HOTREMOVE
407 def_bool y
408
Mahesh Salgaonkarf2296a32013-11-15 09:50:50 +0530409config PPC64_SUPPORTS_MEMORY_FAILURE
410 bool "Add support for memory hwpoison"
411 depends on PPC_BOOK3S_64
412 default "y" if PPC_POWERNV
413 select ARCH_SUPPORTS_MEMORY_FAILURE
414
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000415config KEXEC
Kees Cook642e56f2013-01-16 18:53:25 -0800416 bool "kexec system call"
417 depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP))
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000418 help
419 kexec is a system call that implements the ability to shutdown your
420 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400421 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000422 you can start any kernel with it, not just Linux.
423
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400424 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000425
426 It is an ongoing process to be certain the hardware in a machine
427 is properly shutdown, so do not be surprised if this code does not
Geert Uytterhoevenbf220692013-08-20 21:38:03 +0200428 initially work for you. As of this writing the exact hardware
429 interface is strongly in flux, so no good recommendation can be
430 made.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000431
Haren Mynenie8625d462006-01-14 13:48:25 -0800432config CRASH_DUMP
Bernhard Walle3420b5d2008-06-27 03:02:15 +1000433 bool "Build a kdump crash kernel"
Suzuki Poulose47da4212012-04-15 22:27:35 +0000434 depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
Guenter Roeckfb43e842014-06-30 11:45:30 -0700435 select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
Haren Mynenie8625d462006-01-14 13:48:25 -0800436 help
437 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000438 The same kernel binary can be used as production kernel and dump
439 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800440
Mahesh Salgaonkareb39c882012-02-16 01:14:22 +0000441config FA_DUMP
442 bool "Firmware-assisted dump"
Michael Ellerman90890b12013-10-28 15:00:35 +1100443 depends on PPC64 && PPC_RTAS && CRASH_DUMP && KEXEC
Manish Ahuja242f2712008-03-22 10:50:50 +1100444 help
Mahesh Salgaonkareb39c882012-02-16 01:14:22 +0000445 A robust mechanism to get reliable kernel crash dump with
446 assistance from firmware. This approach does not use kexec,
447 instead firmware assists in booting the kdump kernel
448 while preserving memory contents. Firmware-assisted dump
449 is meant to be a kdump replacement offering robustness and
450 speed not possible without system firmware assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100451
452 If unsure, say "N"
453
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000454config IRQ_ALL_CPUS
455 bool "Distribute interrupts on all CPUs by default"
Paul Bolle6cf09b92013-05-15 11:21:01 +0200456 depends on SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000457 help
458 This option gives the kernel permission to distribute IRQs across
459 multiple CPUs. Saying N here will route all IRQs to the first
460 CPU. Generally saying Y is safe, although some problems have been
461 reported with SMP Power Macintoshes with this option enabled.
462
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700463config NUMA
464 bool "NUMA support"
465 depends on PPC64
466 default y if SMP && PPC_PSERIES
467
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700468config NODES_SHIFT
469 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000470 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700471 default "4"
472 depends on NEED_MULTIPLE_NODES
473
Nishanth Aravamudan8c272262014-05-19 11:14:23 -0700474config USE_PERCPU_NUMA_NODE_ID
475 def_bool y
476 depends on NUMA
477
Nishanth Aravamudan64bb80d2014-05-16 16:41:20 -0700478config HAVE_MEMORYLESS_NODES
479 def_bool y
480 depends on NUMA
481
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000482config ARCH_SELECT_MEMORY_MODEL
483 def_bool y
484 depends on PPC64
485
486config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000487 def_bool y
488 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000489
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000490config ARCH_SPARSEMEM_ENABLE
491 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000492 depends on PPC64
Andy Whitcroftd29eff72007-10-16 01:24:17 -0700493 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100494
495config ARCH_SPARSEMEM_DEFAULT
496 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100497 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000498
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100499config SYS_SUPPORTS_HUGETLBFS
Becky Bruce41151e72011-06-28 09:54:48 +0000500 bool
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100501
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700502source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000503
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800504config ARCH_MEMORY_PROBE
505 def_bool y
506 depends on MEMORY_HOTPLUG
507
Andy Whitcroft75167952006-10-21 10:24:14 -0700508# Some NUMA nodes have memory ranges that span
509# other nodes. Even though a pfn is valid and
510# between a node's start and end pfns, it may not
511# reside on that node. See memmap_init_zone()
512# for details.
513config NODES_SPAN_OTHER_NODES
514 def_bool y
515 depends on NEED_MULTIPLE_NODES
516
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000517config PPC_HAS_HASH_64K
518 bool
519 depends on PPC64
520 default n
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"
561
562config PPC_16K_PAGES
LEROY Christophe959d6172014-09-19 10:36:09 +0200563 bool "16k page size" if 44x || PPC_8xx
Ilya Yanokca9153a2008-12-11 04:55:41 +0300564
565config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000566 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Scott Wood9841c792014-01-17 18:36:38 -0600567 depends on !PPC_FSL_BOOK3E
Ilya Yanokca9153a2008-12-11 04:55:41 +0300568 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
569
Yuri Tikhonove1240122009-01-29 01:40:44 +0000570config PPC_256K_PAGES
571 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000572 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000573 help
574 Make the page size 256k.
575
576 As the ELF standard only requires alignment to support page
577 sizes up to 64k, you will need to compile all of your user
578 space applications with a non-standard binutils settings
579 (see the STDBINUTILS description for details).
580
581 Say N unless you know what you are doing.
582
Ilya Yanokca9153a2008-12-11 04:55:41 +0300583endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100584
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000585config FORCE_MAX_ZONEORDER
586 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000587 range 9 64 if PPC64 && PPC_64K_PAGES
588 default "9" if PPC64 && PPC_64K_PAGES
589 range 13 64 if PPC64 && !PPC_64K_PAGES
590 default "13" if PPC64 && !PPC_64K_PAGES
591 range 9 64 if PPC32 && PPC_16K_PAGES
592 default "9" if PPC32 && PPC_16K_PAGES
593 range 7 64 if PPC32 && PPC_64K_PAGES
594 default "7" if PPC32 && PPC_64K_PAGES
595 range 5 64 if PPC32 && PPC_256K_PAGES
596 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000597 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000598 default "11"
599 help
600 The kernel memory allocator divides physically contiguous memory
601 blocks into "zones", where each zone is a power of two number of
602 pages. This option selects the largest power of two that the kernel
603 keeps in the memory allocator. If you need to allocate very large
604 blocks of physically contiguous memory, then you may need to
605 increase this value.
606
607 This config option is actually maximum order plus one. For example,
608 a value of 11 means that the largest free memory block is 2^10 pages.
609
610 The page size is not necessarily 4KB. For example, on 64-bit
611 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
612 this in mind when choosing a value for this option.
613
Paul Mackerrasfa282372008-01-24 08:35:13 +1100614config PPC_SUBPAGE_PROT
615 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300616 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100617 help
618 This option adds support for a system call to allow user programs
619 to set access permissions (read/write, readonly, or no access)
620 on the 4k subpages of each 64k page.
621
Ian Munsiee83d0162014-10-08 19:54:50 +1100622config PPC_COPRO_BASE
623 bool
624 default n
625
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000626config SCHED_SMT
627 bool "SMT (Hyperthreading) scheduler support"
628 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000629 help
630 SMT scheduler support improves the CPU scheduler's decision making
631 when dealing with POWER5 cpus at a cost of slightly increased
632 overhead in some places. If unsure say N here.
633
Michael Neulingb92a66a2012-09-10 00:35:26 +0000634config PPC_DENORMALISATION
635 bool "PowerPC denormalisation exception handling"
636 depends on PPC_BOOK3S_64
Anton Blanchard4e90a2a2013-07-31 16:31:26 +1000637 default "y" if PPC_POWERNV
Michael Neulingb92a66a2012-09-10 00:35:26 +0000638 ---help---
639 Add support for handling denormalisation of single precision
640 values. Useful for bare metal only. If unsure say Y here.
641
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000642config CMDLINE_BOOL
643 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000644
645config CMDLINE
646 string "Initial kernel command string"
647 depends on CMDLINE_BOOL
648 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
649 help
650 On some platforms, there is currently no way for the boot loader to
651 pass arguments to the kernel. For these platforms, you can supply
652 some command-line options at build time by entering them here. In
653 most cases you will need to specify the root device here.
654
Sebastian Siewioreb3b80f2014-02-20 21:48:17 +0100655config CMDLINE_FORCE
656 bool "Always use the default kernel command string"
657 depends on CMDLINE_BOOL
658 help
659 Always use the default kernel command string, even if the boot
660 loader passes other arguments to the kernel.
661 This is useful if you cannot or don't want to change the
662 command-line options your boot loader passes to the kernel.
663
Grant Likelyc356aa42008-07-09 09:41:52 -0600664config EXTRA_TARGETS
665 string "Additional default image types"
666 help
667 List additional targets to be built by the bootwrapper here (separated
668 by spaces). This is useful for targets that depend of device tree
669 files in the .dts directory.
670
671 Targets in this list will be build as part of the default build
672 target, or when the user does a 'make zImage' or a
673 'make zImage.initrd'.
674
675 If unsure, leave blank
676
Johannes Bergb28f5082008-01-15 23:17:00 -0500677config ARCH_WANTS_FREEZER_CONTROL
678 def_bool y
679 depends on ADB_PMU
680
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000681source kernel/power/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000682
683config SECCOMP
684 bool "Enable seccomp to safely compute untrusted bytecode"
685 depends on PROC_FS
686 default y
687 help
688 This kernel feature is useful for number crunching applications
689 that may need to compute untrusted bytecode during their
690 execution. By using pipes or other transports made available to
691 the process as file descriptors supporting the read/write
692 syscalls, it's possible to isolate those applications in
693 their own address space using seccomp. Once seccomp is
694 enabled via /proc/<pid>/seccomp, it cannot be disabled
695 and the task is only allowed to execute a few safe syscalls
696 defined by each seccomp mode.
697
698 If unsure, say Y. Only embedded should say N here.
699
700endmenu
701
702config ISA_DMA_API
703 bool
Stephen Rothwell3d066d72012-02-22 14:10:12 +0000704 default PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000705
706menu "Bus options"
707
708config ISA
709 bool "Support for ISA-bus hardware"
Paul Bolle933ee712013-03-27 00:47:03 +0000710 depends on PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000711 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000712 help
713 Find out whether you have ISA slots on your motherboard. ISA is the
714 name of a bus system, i.e. the way the CPU talks to the other stuff
715 inside your box. If you have an Apple machine, say N here; if you
Paul Bolle933ee712013-03-27 00:47:03 +0000716 have an IBM RS/6000 or pSeries machine, say Y. If you have an
717 embedded board, consult your board documentation.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000718
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800719config ZONE_DMA
720 bool
721 default y
722
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800723config NEED_DMA_MAP_STATE
724 def_bool (PPC64 || NOT_COHERENT_CACHE)
725
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700726config NEED_SG_DMA_LENGTH
727 def_bool y
728
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000729config GENERIC_ISA_DMA
730 bool
Anton Vorontsov19274452010-07-15 07:38:16 +0000731 depends on ISA_DMA_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000732 default y
733
Paul Mackerras25635c72005-10-26 16:36:55 +1000734config PPC_INDIRECT_PCI
735 bool
736 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600737 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000738 default n
739
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000740config EISA
741 bool
742
743config SBUS
744 bool
745
Kumar Gala08264cb2006-01-10 21:43:56 -0600746config FSL_SOC
747 bool
748
Roy Zang55c44992007-07-10 18:44:34 +0800749config FSL_PCI
750 bool
751 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600752 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800753
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400754config FSL_PMC
755 bool
756 default y
757 depends on SUSPEND && (PPC_85xx || PPC_86xx)
758 help
759 Freescale MPC85xx/MPC86xx power management controller support
760 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
761
Victor Gallardod164f6d2010-10-08 10:25:27 +0000762config PPC4xx_CPM
763 bool
764 default y
765 depends on SUSPEND && (44x || 40x)
766 help
767 PPC4xx Clock Power Management (CPM) support (suspend/resume).
768 It also enables support for two different idle states (idle-wait
769 and idle-doze).
770
Stefan Roese2a706912008-03-26 22:39:50 +1100771config 4xx_SOC
772 bool
773
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400774config FSL_LBC
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800775 bool "Freescale Local Bus support"
776 depends on FSL_SOC
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400777 help
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800778 Enables reporting of errors from the Freescale local bus
779 controller. Also contains some common code used by
780 drivers for specific local bus peripherals.
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400781
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400782config FSL_GTM
783 bool
784 depends on PPC_83xx || QUICC_ENGINE || CPM2
785 help
786 Freescale General-purpose Timers support
787
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000788# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
789config MCA
790 bool
791
John Rigbyb5005632008-06-26 11:07:56 -0600792# Platforms that what PCI turned unconditionally just do select PCI
793# in their config node. Platforms that want to choose at config
794# time should select PPC_PCI_CHOICE
795config PPC_PCI_CHOICE
796 bool
797
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000798config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600799 bool "PCI support" if PPC_PCI_CHOICE
800 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000801 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000802 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael S. Tsirkin335b8cf2011-11-24 21:06:41 +0200803 select GENERIC_PCI_IOMAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000804 help
805 Find out whether your system includes a PCI bus. PCI is the name of
806 a bus system, i.e. the way the CPU talks to the other stuff inside
807 your box. If you say Y here, the kernel will include drivers and
808 infrastructure code to support PCI bus devices.
809
810config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600811 def_bool PCI
812
813config PCI_SYSCALL
814 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000815
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000816config PCI_QSPAN
817 bool "QSpan PCI"
818 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000819 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000820 help
821 Say Y here if you have a system based on a Motorola 8xx-series
822 embedded processor with a QSPAN PCI interface, otherwise say N.
823
824config PCI_8260
825 bool
826 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000827 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000828 default y
829
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500830source "drivers/pci/pcie/Kconfig"
831
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000832source "drivers/pci/Kconfig"
833
834source "drivers/pcmcia/Kconfig"
835
836source "drivers/pci/hotplug/Kconfig"
837
Zhang Weif1f389d2008-04-18 13:33:39 -0700838config HAS_RAPIDIO
839 bool
840 default n
841
842config RAPIDIO
Alexandre Bounine56abde72014-01-23 15:56:04 -0800843 tristate "RapidIO support"
Alexandre Bounine388b78a2011-03-23 16:43:03 -0700844 depends on HAS_RAPIDIO || PCI
Zhang Weif1f389d2008-04-18 13:33:39 -0700845 help
846 If you say Y here, the kernel will include drivers and
847 infrastructure code to support RapidIO interconnect devices.
848
Alexandre Bounine388b78a2011-03-23 16:43:03 -0700849config FSL_RIO
850 bool "Freescale Embedded SRIO Controller support"
Alexandre Bounine56abde72014-01-23 15:56:04 -0800851 depends on RAPIDIO = y && HAS_RAPIDIO
Alexandre Bounine388b78a2011-03-23 16:43:03 -0700852 default "n"
853 ---help---
854 Include support for RapidIO controller on Freescale embedded
855 processors (MPC8548, MPC8641, etc).
856
Zhang Weif1f389d2008-04-18 13:33:39 -0700857source "drivers/rapidio/Kconfig"
858
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000859endmenu
860
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000861config NONSTATIC_KERNEL
862 bool
863 default n
864
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000865menu "Advanced setup"
866 depends on PPC32
867
868config ADVANCED_OPTIONS
869 bool "Prompt for advanced kernel configuration options"
870 help
871 This option will enable prompting for a variety of advanced kernel
872 configuration options. These options can cause the kernel to not
873 work if they are set incorrectly, but can be used to optimize certain
874 aspects of kernel memory management.
875
876 Unless you know what you are doing, say N here.
877
878comment "Default settings for advanced configuration options are used"
879 depends on !ADVANCED_OPTIONS
880
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000881config LOWMEM_SIZE_BOOL
882 bool "Set maximum low memory"
883 depends on ADVANCED_OPTIONS
884 help
885 This option allows you to set the maximum amount of memory which
886 will be used as "low memory", that is, memory which the kernel can
887 access directly, without having to set up a kernel virtual mapping.
888 This can be useful in optimizing the layout of kernel virtual
889 memory.
890
891 Say N here unless you know what you are doing.
892
893config LOWMEM_SIZE
894 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
895 default "0x30000000"
896
Trent Piepho96051462008-12-08 19:34:58 -0800897config LOWMEM_CAM_NUM_BOOL
898 bool "Set number of CAMs to use to map low memory"
899 depends on ADVANCED_OPTIONS && FSL_BOOKE
900 help
901 This option allows you to set the maximum number of CAM slots that
902 will be used to map low memory. There are a limited number of slots
903 available and even more limited number that will fit in the L1 MMU.
904 However, using more entries will allow mapping more low memory. This
905 can be useful in optimizing the layout of kernel virtual memory.
906
907 Say N here unless you know what you are doing.
908
909config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400910 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800911 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
912 default 3
913
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000914config DYNAMIC_MEMSTART
Kees Cook642e56f2013-01-16 18:53:25 -0800915 bool "Enable page aligned dynamic load address for kernel"
916 depends on ADVANCED_OPTIONS && FLATMEM && (FSL_BOOKE || 44x)
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000917 select NONSTATIC_KERNEL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000918 help
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000919 This option enables the kernel to be loaded at any page aligned
920 physical address. The kernel creates a mapping from KERNELBASE to
921 the address where the kernel is loaded. The page size here implies
922 the TLB page size of the mapping for kernel on the particular platform.
923 Please refer to the init code for finding the TLB page size.
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000924
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000925 DYNAMIC_MEMSTART is an easy way of implementing pseudo-RELOCATABLE
926 kernel image, where the only restriction is the page aligned kernel
927 load address. When this option is enabled, the compile time physical
928 address CONFIG_PHYSICAL_START is ignored.
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000929
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000930 This option is overridden by CONFIG_RELOCATABLE
931
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000932config RELOCATABLE
Kees Cook642e56f2013-01-16 18:53:25 -0800933 bool "Build a relocatable kernel"
Kevin Haodd189692013-12-24 15:12:06 +0800934 depends on ADVANCED_OPTIONS && FLATMEM && (44x || FSL_BOOKE)
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000935 select NONSTATIC_KERNEL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000936 help
937 This builds a kernel image that is capable of running at the
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000938 location the kernel is loaded at, without any alignment restrictions.
939 This feature is a superset of DYNAMIC_MEMSTART and hence overrides it.
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000940
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
945 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
946 it has been loaded at and the compile time physical addresses
947 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
948 setting can still be useful to bootwrappers that need to know the
Suzuki Poulose9c5f7d32011-12-14 22:58:12 +0000949 load address of the kernel (eg. u-boot/mkimage).
950
951config RELOCATABLE_PPC32
952 def_bool y
953 depends on PPC32 && RELOCATABLE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000954
955config PAGE_OFFSET_BOOL
956 bool "Set custom page offset address"
957 depends on ADVANCED_OPTIONS
958 help
959 This option allows you to set the kernel virtual address at which
960 the kernel will map low memory. This can be useful in optimizing
961 the virtual memory layout of the system.
962
963 Say N here unless you know what you are doing.
964
965config PAGE_OFFSET
966 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
967 default "0xc0000000"
968
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000969config KERNEL_START_BOOL
970 bool "Set custom kernel base address"
971 depends on ADVANCED_OPTIONS
972 help
973 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000974 the kernel will be loaded. Normally this should match PAGE_OFFSET
975 however there are times (like kdump) that one might not want them
976 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000977
978 Say N here unless you know what you are doing.
979
980config KERNEL_START
981 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000982 default PAGE_OFFSET if PAGE_OFFSET_BOOL
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000983 default "0xc2000000" if CRASH_DUMP && !NONSTATIC_KERNEL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000984 default "0xc0000000"
985
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000986config PHYSICAL_START_BOOL
987 bool "Set physical address where the kernel is loaded"
988 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
989 help
990 This gives the physical address where the kernel is loaded.
991
992 Say N here unless you know what you are doing.
993
994config PHYSICAL_START
995 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
Suzuki Poulose0f890c82011-12-14 22:57:15 +0000996 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !NONSTATIC_KERNEL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000997 default "0x00000000"
998
999config PHYSICAL_ALIGN
1000 hex
Trent Piephoc8f35702008-12-08 19:34:59 -08001001 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001002 help
1003 This value puts the alignment restrictions on physical address
1004 where kernel is loaded and run from. Kernel is compiled for an
1005 address which meets above alignment restriction.
1006
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001007config TASK_SIZE_BOOL
1008 bool "Set custom user task size"
1009 depends on ADVANCED_OPTIONS
1010 help
1011 This option allows you to set the amount of virtual address space
1012 allocated to user tasks. This can be useful in optimizing the
1013 virtual memory layout of the system.
1014
1015 Say N here unless you know what you are doing.
1016
1017config TASK_SIZE
1018 hex "Size of user task space" if TASK_SIZE_BOOL
Paul Bolle933ee712013-03-27 00:47:03 +00001019 default "0x80000000" if PPC_8xx
Kumar Gala4d9e55102007-10-11 13:40:21 -05001020 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001021
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +10001022config CONSISTENT_SIZE_BOOL
1023 bool "Set custom consistent memory pool size"
1024 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
1025 help
1026 This option allows you to set the size of the
1027 consistent memory pool. This pool of virtual memory
1028 is used to make consistent memory allocations.
1029
1030config CONSISTENT_SIZE
1031 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
1032 default "0x00200000" if NOT_COHERENT_CACHE
1033
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001034config PIN_TLB
1035 bool "Pinned Kernel TLBs (860 ONLY)"
1036 depends on ADVANCED_OPTIONS && 8xx
1037endmenu
1038
Stephen Rothwellcabb5582005-09-30 16:16:52 +10001039if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +10001040config RELOCATABLE
1041 bool "Build a relocatable kernel"
Guenter Roeckfb43e842014-06-30 11:45:30 -07001042 depends on !COMPILE_TEST
Suzuki Poulose0f890c82011-12-14 22:57:15 +00001043 select NONSTATIC_KERNEL
Paul Mackerras549e8152008-08-30 11:43:47 +10001044 help
1045 This builds a kernel image that is capable of running anywhere
1046 in the RMA (real memory area) at any 16k-aligned base address.
1047 The kernel is linked as a position-independent executable (PIE)
1048 and contains dynamic relocations which are processed early
1049 in the bootup process.
1050
1051 One use is for the kexec on panic case where the recovery kernel
1052 must live at a different physical address than the primary
1053 kernel.
1054
Paul Mackerrasbdbc29c2013-08-27 16:07:49 +10001055# This value must have zeroes in the bottom 60 bits otherwise lots will break
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001056config PAGE_OFFSET
Stephen Rothwellcabb5582005-09-30 16:16:52 +10001057 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +10001058 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001059config KERNEL_START
1060 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001061 default "0xc000000000000000"
1062config PHYSICAL_START
1063 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +10001064 default "0x00000000"
Stephen Rothwellcabb5582005-09-30 16:16:52 +10001065endif
1066
Michael Ellermana4da0d52013-10-11 14:07:57 +11001067config ARCH_RANDOM
1068 def_bool n
1069
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001070source "net/Kconfig"
1071
1072source "drivers/Kconfig"
1073
1074source "fs/Kconfig"
1075
Li Yang98658532006-10-03 23:10:46 -05001076source "arch/powerpc/sysdev/qe_lib/Kconfig"
1077
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001078source "lib/Kconfig"
1079
Paul Mackerras14cf11a2005-09-26 16:04:21 +10001080source "arch/powerpc/Kconfig.debug"
1081
1082source "security/Kconfig"
1083
1084config KEYS_COMPAT
1085 bool
1086 depends on COMPAT && KEYS
1087 default y
1088
1089source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +10001090
Sylvain Munaut1088a202007-09-16 20:53:25 +10001091config PPC_LIB_RHEAP
1092 bool
1093
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -05001094source "arch/powerpc/kvm/Kconfig"