blob: e625e9e034ae19abe973282a3d83952493e8b709 [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
Paul Mackerras14cf11a2005-09-26 16:04:21 +100023config MMU
24 bool
25 default y
26
Tony Breedsaa3be5f2007-09-21 13:26:02 +100027config GENERIC_CMOS_UPDATE
28 def_bool y
29
Tony Breeds4a4cfe32007-09-22 07:35:52 +100030config GENERIC_TIME_VSYSCALL
31 def_bool y
32
Tony Breedsd831d0b2007-09-21 13:26:03 +100033config GENERIC_CLOCKEVENTS
34 def_bool y
35
Paul Mackerras14cf11a2005-09-26 16:04:21 +100036config GENERIC_HARDIRQS
37 bool
38 default y
39
Michael Ellerman8e27f4d2009-04-22 15:31:45 +000040config GENERIC_HARDIRQS_NO__DO_IRQ
41 bool
42 default y
43
Tejun Heoc2a7e812009-08-14 15:00:53 +090044config HAVE_SETUP_PER_CPU_AREA
Tejun Heoe74e3962009-03-30 19:07:44 +090045 def_bool PPC64
46
Tejun Heoc2a7e812009-08-14 15:00:53 +090047config NEED_PER_CPU_EMBED_FIRST_CHUNK
travis@sgi.comb32ef632008-01-30 13:32:51 +010048 def_bool PPC64
49
Ingo Molnar0d7012a2006-06-29 02:24:43 -070050config IRQ_PER_CPU
51 bool
52 default y
53
Michael Ellerman551b81f2009-10-13 19:44:44 +000054config NR_IRQS
55 int "Number of virtual interrupt numbers"
Anton Blanchard859aefc2010-01-31 01:14:03 +000056 range 32 32768
Michael Ellerman551b81f2009-10-13 19:44:44 +000057 default "512"
58 help
59 This defines the number of virtual interrupt numbers the kernel
60 can manage. Virtual interrupt numbers are what you see in
61 /proc/interrupts. If you configure your system to have too few,
62 drivers will fail to load or worse - handle with care.
63
Christoph Hellwigfd3e0bb2008-04-17 14:35:00 +100064config STACKTRACE_SUPPORT
65 bool
66 default y
67
Arnd Bergmann01f4b8b2008-07-11 00:08:18 +100068config HAVE_LATENCYTOP_SUPPORT
69 def_bool y
70
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100071config TRACE_IRQFLAGS_SUPPORT
72 bool
Benjamin Herrenschmidt945feb12008-04-17 14:35:01 +100073 default y
74
75config LOCKDEP_SUPPORT
76 bool
77 default y
78
Paul Mackerras14cf11a2005-09-26 16:04:21 +100079config RWSEM_GENERIC_SPINLOCK
80 bool
81
82config RWSEM_XCHGADD_ALGORITHM
83 bool
84 default y
85
Nick Piggin95c354f2008-01-30 13:31:20 +010086config GENERIC_LOCKBREAK
87 bool
88 default y
89 depends on SMP && PREEMPT
90
David Howellsf0d1b0b2006-12-08 02:37:49 -080091config ARCH_HAS_ILOG2_U32
92 bool
David Howellsef55d532006-12-08 02:37:53 -080093 default y
David Howellsf0d1b0b2006-12-08 02:37:49 -080094
95config ARCH_HAS_ILOG2_U64
96 bool
David Howellsef55d532006-12-08 02:37:53 -080097 default y if 64BIT
David Howellsf0d1b0b2006-12-08 02:37:49 -080098
Akinobu Mitae779b2f2006-03-26 01:39:33 -080099config GENERIC_HWEIGHT
100 bool
101 default y
102
Jon Mason0a9cb462006-05-19 15:35:32 -0500103config GENERIC_FIND_NEXT_BIT
104 bool
105 default y
106
Anton Vorontsovb7ce3412008-04-11 23:06:36 +1000107config GENERIC_GPIO
108 bool
109 help
110 Generic GPIO API support
111
Stephen Rothwellf057eac2007-07-15 23:40:05 -0700112config ARCH_NO_VIRT_TO_BUS
113 def_bool PPC64
114
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000115config PPC
116 bool
117 default y
Stephen Rothwell10f85f42010-06-29 12:43:34 +1000118 select OF
119 select OF_FLATTREE
Steven Rostedt2b79d692009-01-06 18:49:17 +0000120 select HAVE_FTRACE_MCOUNT_RECORD
121 select HAVE_DYNAMIC_FTRACE
Steven Rostedt606576c2008-10-06 19:06:12 -0400122 select HAVE_FUNCTION_TRACER
Steven Rostedt60ce8f72009-02-11 20:06:43 -0500123 select HAVE_FUNCTION_GRAPH_TRACER
Michael Buesch7444a722008-07-25 01:46:11 -0700124 select ARCH_WANT_OPTIONAL_GPIOLIB
Sam Ravnborgec7748b2008-02-09 10:46:40 +0100125 select HAVE_IDE
Benjamin Herrenschmidta1f242f2008-07-23 21:27:08 -0700126 select HAVE_IOREMAP_PROT
Johannes Berg58340a02008-07-25 01:45:33 -0700127 select HAVE_EFFICIENT_UNALIGNED_ACCESS
Mathieu Desnoyers3f550092008-02-02 15:10:35 -0500128 select HAVE_KPROBES
Jason Wessel17ce4522008-07-23 11:30:15 -0500129 select HAVE_ARCH_KGDB
Ananth N Mavinakayanahalli9edddaa2008-03-04 14:28:37 -0800130 select HAVE_KRETPROBES
Roland McGrathdec2b0d2008-07-27 16:53:20 +1000131 select HAVE_ARCH_TRACEHOOK
Yinghai Lu95f72d12010-07-12 14:36:09 +1000132 select HAVE_MEMBLOCK
FUJITA Tomonori46bab4e2009-08-04 19:08:26 +0000133 select HAVE_DMA_ATTRS
FUJITA Tomonori80d3e8a2009-08-04 19:08:28 +0000134 select HAVE_DMA_API_DEBUG
Jens Axboeb7d7a242008-06-26 11:22:13 +0200135 select USE_GENERIC_SMP_HELPERS if SMP
Steven Rostedt4e491d12008-05-14 23:49:44 -0400136 select HAVE_OPROFILE
Benjamin Herrenschmidtee6a0932009-01-14 14:14:00 +0100137 select HAVE_SYSCALL_WRAPPERS if PPC64
Paul Mackerrasc2e95c62009-06-12 21:10:41 +0000138 select GENERIC_ATOMIC64 if PPC32
Peter Zijlstrae360adb2010-10-14 14:01:34 +0800139 select HAVE_IRQ_WORK
Ingo Molnarcdd6c482009-09-21 12:02:48 +0200140 select HAVE_PERF_EVENTS
Mahesh Salgaonkar359e4282010-04-07 18:10:20 +1000141 select HAVE_REGS_AND_STACK_ACCESS_API
K.Prasad5aae8a52010-06-15 11:35:19 +0530142 select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000143
144config EARLY_PRINTK
145 bool
Benjamin Herrenschmidt51d30822005-11-23 17:57:25 +1100146 default y
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000147
148config COMPAT
149 bool
150 default y if PPC64
Roland McGrath01e31db2008-01-02 17:03:11 -0800151 select COMPAT_BINFMT_ELF
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000152
153config SYSVIPC_COMPAT
154 bool
155 depends on COMPAT && SYSVIPC
156 default y
157
158# All PPC32s use generic nvram driver through ppc_md
159config GENERIC_NVRAM
160 bool
161 default y if PPC32
162
Ingo Molnarae1e9132008-11-11 09:05:16 +0100163config SCHED_OMIT_FRAME_POINTER
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000164 bool
165 default y
166
167config ARCH_MAY_HAVE_PC_FDC
168 bool
Stephen Rothwellbed59272007-03-04 17:04:44 +1100169 default !PPC_PSERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000170
Kumar Gala08264cb2006-01-10 21:43:56 -0600171config PPC_OF
172 def_bool y
173
174config PPC_UDBG_16550
175 bool
176 default n
177
Kumar Gala08264cb2006-01-10 21:43:56 -0600178config GENERIC_TBSYNC
179 bool
180 default y if PPC32 && SMP
181 default n
182
Al Viroe65e1fc2006-09-12 03:04:40 -0400183config AUDIT_ARCH
184 bool
185 default y
186
Jeremy Fitzhardinge73c9cea2006-12-08 03:30:41 -0800187config GENERIC_BUG
188 bool
189 default y
190 depends on BUG
191
Johannes Bergb3028872007-03-20 05:18:02 +1100192config SYS_SUPPORTS_APM_EMULATION
Kumar Gala58da10b2007-05-23 09:51:46 -0500193 default y if PMAC_APM_EMU
Johannes Bergb3028872007-03-20 05:18:02 +1100194 bool
195
Kumar Galaf4fc4a52006-01-16 10:53:22 -0600196config DEFAULT_UIMAGE
197 bool
198 help
199 Used to allow a board to specify it wants a uImage built by default
200 default n
201
Scott Woodb09c1642008-01-17 16:31:40 -0600202config REDBOOT
203 bool
204
Johannes Berg801e4062007-12-08 02:12:39 +0100205config ARCH_HIBERNATION_POSSIBLE
206 bool
Johannes Berg543b9fd2007-05-03 22:31:38 +1000207 default y
208
Johannes Bergf4cb5702007-12-08 02:14:00 +0100209config ARCH_SUSPEND_POSSIBLE
210 def_bool y
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400211 depends on ADB_PMU || PPC_EFIKA || PPC_LITE5200 || PPC_83xx || \
Brian King32d8ad42010-07-07 12:31:02 +0000212 PPC_85xx || PPC_86xx || PPC_PSERIES
Johannes Bergf4cb5702007-12-08 02:14:00 +0100213
Benjamin Herrenschmidt4c75a6f2006-11-11 17:24:53 +1100214config PPC_DCR_NATIVE
215 bool
216 default n
217
218config PPC_DCR_MMIO
219 bool
220 default n
221
222config PPC_DCR
223 bool
224 depends on PPC_DCR_NATIVE || PPC_DCR_MMIO
225 default y
226
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100227config PPC_OF_PLATFORM_PCI
228 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100229 depends on PCI
Benjamin Herrenschmidt4c9d2802006-11-11 17:25:08 +1100230 depends on PPC64 # not supported on 32 bits yet
231 default n
232
Akinobu Mita6a11f752009-03-31 15:23:17 -0700233config ARCH_SUPPORTS_DEBUG_PAGEALLOC
234 def_bool y
235
Dave Kleikamp172ae2e2010-02-08 11:50:57 +0000236config PPC_ADV_DEBUG_REGS
237 bool
238 depends on 40x || BOOKE
239 default y
240
241config PPC_ADV_DEBUG_IACS
242 int
243 depends on PPC_ADV_DEBUG_REGS
244 default 4 if 44x
245 default 2
246
247config PPC_ADV_DEBUG_DACS
248 int
249 depends on PPC_ADV_DEBUG_REGS
250 default 2
251
252config PPC_ADV_DEBUG_DVCS
253 int
254 depends on PPC_ADV_DEBUG_REGS
255 default 2 if 44x
256 default 0
257
258config PPC_ADV_DEBUG_DAC_RANGE
259 bool
260 depends on PPC_ADV_DEBUG_REGS && 44x
261 default y
262
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000263source "init/Kconfig"
264
Matt Helsleydc52ddc2008-10-18 20:27:21 -0700265source "kernel/Kconfig.freezer"
266
Benjamin Herrenschmidta2d2e1e2007-12-21 15:39:24 +1100267source "arch/powerpc/sysdev/Kconfig"
Kumar Gala4330f5d2007-03-16 09:32:17 -0500268source "arch/powerpc/platforms/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000269
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000270menu "Kernel options"
271
272config HIGHMEM
273 bool "High memory support"
274 depends on PPC32
275
Tony Breeds1ad74992007-09-21 13:26:03 +1000276source kernel/time/Kconfig
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000277source kernel/Kconfig.hz
278source kernel/Kconfig.preempt
279source "fs/Kconfig.binfmt"
280
Mel Gormanba72cb82007-11-28 16:21:13 -0800281config HUGETLB_PAGE_SIZE_VARIABLE
282 bool
283 depends on HUGETLB_PAGE
284 default y
285
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000286config MATH_EMULATION
287 bool "Math emulation"
Kumar Gala4d527192007-01-26 00:23:34 -0600288 depends on 4xx || 8xx || E200 || PPC_MPC832x || E500
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000289 ---help---
290 Some PowerPC chips designed for embedded applications do not have
291 a floating-point unit and therefore do not implement the
292 floating-point instructions in the PowerPC instruction set. If you
293 say Y here, the kernel will include code to emulate a floating-point
294 unit, which will allow programs that use floating-point
295 instructions to run.
296
Scott Wood5dd57a12007-09-18 15:29:35 -0500297config 8XX_MINIMAL_FPEMU
298 bool "Minimal math emulation for 8xx"
299 depends on 8xx && !MATH_EMULATION
300 help
301 Older arch/ppc kernels still emulated a few floating point
302 instructions such as load and store, even when full math
303 emulation is disabled. Say "Y" here if you want to preserve
304 this behavior.
305
306 It is recommended that you build a soft-float userspace instead.
307
FUJITA Tomonorifb3475e2008-02-04 22:28:08 -0800308config IOMMU_HELPER
309 def_bool PPC64
310
Becky Bruceec3cf2e2009-05-14 12:42:28 +0000311config SWIOTLB
312 bool "SWIOTLB support"
313 default n
314 select IOMMU_HELPER
315 ---help---
316 Support for IO bounce buffering for systems without an IOMMU.
317 This allows us to DMA to the full physical address space on
318 platforms where the size of a physical address is larger
319 than the bus address. Not all platforms support this.
320
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000321config HOTPLUG_CPU
322 bool "Support for enabling/disabling CPUs"
323 depends on SMP && HOTPLUG && EXPERIMENTAL && (PPC_PSERIES || PPC_PMAC)
324 ---help---
325 Say Y here to be able to disable and re-enable individual
326 CPUs at runtime on SMP machines.
327
328 Say N if you are unsure.
329
Nathan Fontenot12633e82009-11-25 17:23:25 +0000330config ARCH_CPU_PROBE_RELEASE
331 def_bool y
332 depends on HOTPLUG_CPU
333
Yasunori Gotocc576372006-06-29 02:24:27 -0700334config ARCH_ENABLE_MEMORY_HOTPLUG
335 def_bool y
336
Badari Pulavartya99824f2008-02-05 00:10:18 -0800337config ARCH_HAS_WALK_MEMORY
338 def_bool y
339
Badari Pulavarty14824712008-02-05 00:10:17 -0800340config ARCH_ENABLE_MEMORY_HOTREMOVE
341 def_bool y
342
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000343config KEXEC
344 bool "kexec system call (EXPERIMENTAL)"
Matthew McClintockf933a412010-07-21 16:14:53 -0500345 depends on (PPC_BOOK3S || FSL_BOOKE) && EXPERIMENTAL
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000346 help
347 kexec is a system call that implements the ability to shutdown your
348 current kernel, and to start another kernel. It is like a reboot
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400349 but it is independent of the system firmware. And like a reboot
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000350 you can start any kernel with it, not just Linux.
351
Matt LaPlante1f1332f2006-06-29 01:32:47 -0400352 The name comes from the similarity to the exec system call.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000353
354 It is an ongoing process to be certain the hardware in a machine
355 is properly shutdown, so do not be surprised if this code does not
356 initially work for you. It may help to enable device hotplugging
357 support. As of this writing the exact hardware interface is
358 strongly in flux, so no good recommendation can be made.
359
Haren Mynenie8625d462006-01-14 13:48:25 -0800360config CRASH_DUMP
Bernhard Walle3420b5da2008-06-27 03:02:15 +1000361 bool "Build a kdump crash kernel"
Matthew McClintockf933a412010-07-21 16:14:53 -0500362 depends on PPC64 || 6xx || FSL_BOOKE
363 select RELOCATABLE if PPC64 || FSL_BOOKE
Haren Mynenie8625d462006-01-14 13:48:25 -0800364 help
365 Build a kernel suitable for use as a kdump capture kernel.
Mohan Kumar M54622f12008-10-21 17:38:10 +0000366 The same kernel binary can be used as production kernel and dump
367 capture kernel.
Haren Mynenie8625d462006-01-14 13:48:25 -0800368
Manish Ahuja242f2712008-03-22 10:50:50 +1100369config PHYP_DUMP
370 bool "Hypervisor-assisted dump (EXPERIMENTAL)"
371 depends on PPC_PSERIES && EXPERIMENTAL
372 help
373 Hypervisor-assisted dump is meant to be a kdump replacement
374 offering robustness and speed not possible without system
Matt LaPlante692105b2009-01-26 11:12:25 +0100375 hypervisor assistance.
Manish Ahuja242f2712008-03-22 10:50:50 +1100376
377 If unsure, say "N"
378
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000379config PPCBUG_NVRAM
380 bool "Enable reading PPCBUG NVRAM during boot" if PPLUS || LOPEC
381 default y if PPC_PREP
382
383config IRQ_ALL_CPUS
384 bool "Distribute interrupts on all CPUs by default"
385 depends on SMP && !MV64360
386 help
387 This option gives the kernel permission to distribute IRQs across
388 multiple CPUs. Saying N here will route all IRQs to the first
389 CPU. Generally saying Y is safe, although some problems have been
390 reported with SMP Power Macintoshes with this option enabled.
391
Michael Ellermancd015702009-10-13 19:45:03 +0000392config SPARSE_IRQ
393 bool "Support sparse irq numbering"
Yang Li9ce91682010-06-28 23:32:57 +0000394 default n
Michael Ellermancd015702009-10-13 19:45:03 +0000395 help
396 This enables support for sparse irqs. This is useful for distro
397 kernels that want to define a high CONFIG_NR_CPUS value but still
398 want to have low kernel memory footprint on smaller machines.
399
400 ( Sparse IRQs can also be beneficial on NUMA boxes, as they spread
401 out the irq_desc[] array in a more NUMA-friendly way. )
402
Yang Li9ce91682010-06-28 23:32:57 +0000403 If you don't know what to do here, say N.
Michael Ellermancd015702009-10-13 19:45:03 +0000404
Andy Whitcroftffa27b62005-10-28 17:46:58 -0700405config NUMA
406 bool "NUMA support"
407 depends on PPC64
408 default y if SMP && PPC_PSERIES
409
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700410config NODES_SHIFT
411 int
Anton Blanchardea55bf22009-09-21 19:56:43 +0000412 default "8" if PPC64
Yasunori Gotoc80d79d2006-04-10 22:53:53 -0700413 default "4"
414 depends on NEED_MULTIPLE_NODES
415
Anton Blanchardea55bf22009-09-21 19:56:43 +0000416config MAX_ACTIVE_REGIONS
417 int
418 default "256" if PPC64
419 default "32"
420
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000421config ARCH_SELECT_MEMORY_MODEL
422 def_bool y
423 depends on PPC64
424
425config ARCH_FLATMEM_ENABLE
Andy Whitcroft9100b202005-11-29 19:20:55 +0000426 def_bool y
427 depends on (PPC64 && !NUMA) || PPC32
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000428
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000429config ARCH_SPARSEMEM_ENABLE
430 def_bool y
Andy Whitcroft9100b202005-11-29 19:20:55 +0000431 depends on PPC64
Andy Whitcroftd29eff7bc2007-10-16 01:24:17 -0700432 select SPARSEMEM_VMEMMAP_ENABLE
Anton Blanchard45fb6ce2005-11-11 14:22:35 +1100433
434config ARCH_SPARSEMEM_DEFAULT
435 def_bool y
Benjamin Herrenschmidt78bde532007-02-13 11:46:06 +1100436 depends on (SMP && PPC_PSERIES) || PPC_PS3
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000437
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700438config ARCH_POPULATES_NODE_MAP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000439 def_bool y
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700440
Benjamin Herrenschmidt5a1eb5c2009-10-30 15:03:54 +1100441config SYS_SUPPORTS_HUGETLBFS
442 def_bool y
443 depends on PPC_BOOK3S_64
444
Mel Gormanc67c3cb2006-09-27 01:49:49 -0700445source "mm/Kconfig"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000446
Mike Kravetz7e9191d2005-11-07 09:39:48 -0800447config ARCH_MEMORY_PROBE
448 def_bool y
449 depends on MEMORY_HOTPLUG
450
Andy Whitcroft7516795732006-10-21 10:24:14 -0700451# Some NUMA nodes have memory ranges that span
452# other nodes. Even though a pfn is valid and
453# between a node's start and end pfns, it may not
454# reside on that node. See memmap_init_zone()
455# for details.
456config NODES_SPAN_OTHER_NODES
457 def_bool y
458 depends on NEED_MULTIPLE_NODES
459
Benjamin Herrenschmidt16c2d472007-05-08 16:27:28 +1000460config PPC_HAS_HASH_64K
461 bool
462 depends on PPC64
463 default n
464
Yuri Tikhonove1240122009-01-29 01:40:44 +0000465config STDBINUTILS
466 bool "Using standard binutils settings"
467 depends on 44x
468 default y
469 help
470 Turning this option off allows you to select 256KB PAGE_SIZE on 44x.
471 Note, that kernel will be able to run only those applications,
472 which had been compiled using binutils later than 2.17.50.0.3 with
473 '-zmax-page-size' set to 256K (the default is 64K). Or, if using
474 the older binutils, you can patch them with a trivial patch, which
475 changes the ELF_MAXPAGESIZE definition from 0x10000 to 0x40000.
476
Ilya Yanokca9153a2008-12-11 04:55:41 +0300477choice
478 prompt "Page size"
479 default PPC_4K_PAGES
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100480 help
Ilya Yanokca9153a2008-12-11 04:55:41 +0300481 Select the kernel logical page size. Increasing the page size
482 will reduce software overhead at each page boundary, allow
483 hardware prefetch mechanisms to be more effective, and allow
484 larger dma transfers increasing IO efficiency and reducing
485 overhead. However the utilization of memory will increase.
486 For example, each cached file will using a multiple of the
487 page size to hold its contents and the difference between the
488 end of file and the end of page is wasted.
489
490 Some dedicated systems, such as software raid serving with
491 accelerated calculations, have shown significant increases.
492
493 If you configure a 64 bit kernel for 64k pages but the
494 processor does not support them, then the kernel will simulate
495 them with 4k pages, loading them on demand, but with the
496 reduced software overhead and larger internal fragmentation.
497 For the 32 bit kernel, a large page option will not be offered
498 unless it is supported by the configured processor.
499
500 If unsure, choose 4K_PAGES.
501
502config PPC_4K_PAGES
503 bool "4k page size"
504
505config PPC_16K_PAGES
506 bool "16k page size" if 44x
507
508config PPC_64K_PAGES
Benjamin Herrenschmidt2d27cfd2009-07-23 23:15:59 +0000509 bool "64k page size" if 44x || PPC_STD_MMU_64 || PPC_BOOK3E_64
Ilya Yanokca9153a2008-12-11 04:55:41 +0300510 select PPC_HAS_HASH_64K if PPC_STD_MMU_64
511
Yuri Tikhonove1240122009-01-29 01:40:44 +0000512config PPC_256K_PAGES
513 bool "256k page size" if 44x
Hugh Dickinsadf213c2009-04-06 11:01:15 +0000514 depends on !STDBINUTILS
Yuri Tikhonove1240122009-01-29 01:40:44 +0000515 help
516 Make the page size 256k.
517
518 As the ELF standard only requires alignment to support page
519 sizes up to 64k, you will need to compile all of your user
520 space applications with a non-standard binutils settings
521 (see the STDBINUTILS description for details).
522
523 Say N unless you know what you are doing.
524
Ilya Yanokca9153a2008-12-11 04:55:41 +0300525endchoice
Benjamin Herrenschmidt3c726f82005-11-07 11:06:55 +1100526
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000527config FORCE_MAX_ZONEORDER
528 int "Maximum zone order"
Benjamin Herrenschmidt066c4b82009-07-21 15:25:53 +0000529 range 9 64 if PPC64 && PPC_64K_PAGES
530 default "9" if PPC64 && PPC_64K_PAGES
531 range 13 64 if PPC64 && !PPC_64K_PAGES
532 default "13" if PPC64 && !PPC_64K_PAGES
533 range 9 64 if PPC32 && PPC_16K_PAGES
534 default "9" if PPC32 && PPC_16K_PAGES
535 range 7 64 if PPC32 && PPC_64K_PAGES
536 default "7" if PPC32 && PPC_64K_PAGES
537 range 5 64 if PPC32 && PPC_256K_PAGES
538 default "5" if PPC32 && PPC_256K_PAGES
Johannes Bergebe40c52008-09-24 04:29:08 +0000539 range 11 64
Stephen Rothwell53bcddb2008-04-11 11:11:56 +1000540 default "11"
541 help
542 The kernel memory allocator divides physically contiguous memory
543 blocks into "zones", where each zone is a power of two number of
544 pages. This option selects the largest power of two that the kernel
545 keeps in the memory allocator. If you need to allocate very large
546 blocks of physically contiguous memory, then you may need to
547 increase this value.
548
549 This config option is actually maximum order plus one. For example,
550 a value of 11 means that the largest free memory block is 2^10 pages.
551
552 The page size is not necessarily 4KB. For example, on 64-bit
553 systems, 64KB pages can be enabled via CONFIG_PPC_64K_PAGES. Keep
554 this in mind when choosing a value for this option.
555
Paul Mackerrasfa282372008-01-24 08:35:13 +1100556config PPC_SUBPAGE_PROT
557 bool "Support setting protections for 4k subpages"
Ilya Yanokca9153a2008-12-11 04:55:41 +0300558 depends on PPC_STD_MMU_64 && PPC_64K_PAGES
Paul Mackerrasfa282372008-01-24 08:35:13 +1100559 help
560 This option adds support for a system call to allow user programs
561 to set access permissions (read/write, readonly, or no access)
562 on the 4k subpages of each 64k page.
563
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000564config SCHED_SMT
565 bool "SMT (Hyperthreading) scheduler support"
566 depends on PPC64 && SMP
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000567 help
568 SMT scheduler support improves the CPU scheduler's decision making
569 when dealing with POWER5 cpus at a cost of slightly increased
570 overhead in some places. If unsure say N here.
571
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000572config CMDLINE_BOOL
573 bool "Default bootloader kernel arguments"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000574
575config CMDLINE
576 string "Initial kernel command string"
577 depends on CMDLINE_BOOL
578 default "console=ttyS0,9600 console=tty0 root=/dev/sda2"
579 help
580 On some platforms, there is currently no way for the boot loader to
581 pass arguments to the kernel. For these platforms, you can supply
582 some command-line options at build time by entering them here. In
583 most cases you will need to specify the root device here.
584
Grant Likelyc356aa42008-07-09 09:41:52 -0600585config EXTRA_TARGETS
586 string "Additional default image types"
587 help
588 List additional targets to be built by the bootwrapper here (separated
589 by spaces). This is useful for targets that depend of device tree
590 files in the .dts directory.
591
592 Targets in this list will be build as part of the default build
593 target, or when the user does a 'make zImage' or a
594 'make zImage.initrd'.
595
596 If unsure, leave blank
597
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000598if !44x || BROKEN
Johannes Bergb28f5082008-01-15 23:17:00 -0500599config ARCH_WANTS_FREEZER_CONTROL
600 def_bool y
601 depends on ADB_PMU
602
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000603source kernel/power/Kconfig
604endif
605
606config SECCOMP
607 bool "Enable seccomp to safely compute untrusted bytecode"
608 depends on PROC_FS
609 default y
610 help
611 This kernel feature is useful for number crunching applications
612 that may need to compute untrusted bytecode during their
613 execution. By using pipes or other transports made available to
614 the process as file descriptors supporting the read/write
615 syscalls, it's possible to isolate those applications in
616 their own address space using seccomp. Once seccomp is
617 enabled via /proc/<pid>/seccomp, it cannot be disabled
618 and the task is only allowed to execute a few safe syscalls
619 defined by each seccomp mode.
620
621 If unsure, say Y. Only embedded should say N here.
622
623endmenu
624
625config ISA_DMA_API
626 bool
Stephen Rothwell373a6da2007-12-21 15:37:07 +1100627 default !PPC_ISERIES || PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000628
629menu "Bus options"
630
631config ISA
632 bool "Support for ISA-bus hardware"
633 depends on PPC_PREP || PPC_CHRP
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000634 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000635 help
636 Find out whether you have ISA slots on your motherboard. ISA is the
637 name of a bus system, i.e. the way the CPU talks to the other stuff
638 inside your box. If you have an Apple machine, say N here; if you
639 have an IBM RS/6000 or pSeries machine or a PReP machine, say Y. If
640 you have an embedded board, consult your board documentation.
641
Christoph Lameter5ac6da62007-02-10 01:43:14 -0800642config ZONE_DMA
643 bool
644 default y
645
FUJITA Tomonoriaf407c62010-03-10 15:23:27 -0800646config NEED_DMA_MAP_STATE
647 def_bool (PPC64 || NOT_COHERENT_CACHE)
648
FUJITA Tomonorie32205e2010-05-26 14:44:33 -0700649config NEED_SG_DMA_LENGTH
650 def_bool y
651
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000652config GENERIC_ISA_DMA
653 bool
Anton Vorontsov19274452010-07-15 07:38:16 +0000654 depends on ISA_DMA_API
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000655 default y
656
Paul Mackerras25635c72005-10-26 16:36:55 +1000657config PPC_INDIRECT_PCI
658 bool
659 depends on PCI
Becky Bruce63dafe52006-01-14 16:57:39 -0600660 default y if 40x || 44x
Paul Mackerras25635c72005-10-26 16:36:55 +1000661 default n
662
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000663config EISA
664 bool
665
666config SBUS
667 bool
668
Kumar Gala08264cb2006-01-10 21:43:56 -0600669config FSL_SOC
670 bool
671
Roy Zang55c44992007-07-10 18:44:34 +0800672config FSL_PCI
673 bool
674 select PPC_INDIRECT_PCI
Kumar Galad0839112009-01-28 13:25:29 -0600675 select PCI_QUIRKS
Roy Zang55c44992007-07-10 18:44:34 +0800676
Anton Vorontsov4ffd6952009-09-16 01:43:57 +0400677config FSL_PMC
678 bool
679 default y
680 depends on SUSPEND && (PPC_85xx || PPC_86xx)
681 help
682 Freescale MPC85xx/MPC86xx power management controller support
683 (suspend/resume). For MPC83xx see platforms/83xx/suspend.c
684
Stefan Roese2a706912008-03-26 22:39:50 +1100685config 4xx_SOC
686 bool
687
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400688config FSL_LBC
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800689 bool "Freescale Local Bus support"
690 depends on FSL_SOC
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400691 help
Roy Zang3ab8f2a2010-10-18 15:22:31 +0800692 Enables reporting of errors from the Freescale local bus
693 controller. Also contains some common code used by
694 drivers for specific local bus peripherals.
Anton Vorontsovacaa7aa2008-04-11 21:03:40 +0400695
Anton Vorontsov83ff9dc2008-05-23 20:38:54 +0400696config FSL_GTM
697 bool
698 depends on PPC_83xx || QUICC_ENGINE || CPM2
699 help
700 Freescale General-purpose Timers support
701
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000702# Yes MCA RS/6000s exist but Linux-PPC does not currently support any
703config MCA
704 bool
705
John Rigbyb5005632008-06-26 11:07:56 -0600706# Platforms that what PCI turned unconditionally just do select PCI
707# in their config node. Platforms that want to choose at config
708# time should select PPC_PCI_CHOICE
709config PPC_PCI_CHOICE
710 bool
711
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000712config PCI
John Rigbyb5005632008-06-26 11:07:56 -0600713 bool "PCI support" if PPC_PCI_CHOICE
714 default y if !40x && !CPM2 && !8xx && !PPC_83xx \
Albert Herranzbcc48592009-12-12 06:31:39 +0000715 && !PPC_85xx && !PPC_86xx && !GAMECUBE_COMMON
David Gibsonf21f49e2007-06-13 14:52:54 +1000716 default PCI_PERMEDIA if !4xx && !CPM2 && !8xx
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000717 default PCI_QSPAN if !4xx && !CPM2 && 8xx
Michael Ellermandf87ef52007-05-08 12:58:34 +1000718 select ARCH_SUPPORTS_MSI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000719 help
720 Find out whether your system includes a PCI bus. PCI is the name of
721 a bus system, i.e. the way the CPU talks to the other stuff inside
722 your box. If you say Y here, the kernel will include drivers and
723 infrastructure code to support PCI bus devices.
724
725config PCI_DOMAINS
Matthew Wilcox36e23592007-07-10 10:54:40 -0600726 def_bool PCI
727
728config PCI_SYSCALL
729 def_bool PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000730
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000731config PCI_QSPAN
732 bool "QSpan PCI"
733 depends on !4xx && !CPM2 && 8xx
Paul Mackerrasf9bd1702005-10-26 16:47:42 +1000734 select PPC_I8259
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000735 help
736 Say Y here if you have a system based on a Motorola 8xx-series
737 embedded processor with a QSPAN PCI interface, otherwise say N.
738
739config PCI_8260
740 bool
741 depends on PCI && 8260
Paul Mackerras25635c72005-10-26 16:36:55 +1000742 select PPC_INDIRECT_PCI
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000743 default y
744
745config 8260_PCI9
Andrew Morton4a3ecc622006-06-01 20:36:04 -0700746 bool "Enable workaround for MPC826x erratum PCI 9"
Scott Woode00c5492007-09-14 15:41:56 -0500747 depends on PCI_8260 && !8272
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000748 default y
749
750choice
Andrew Morton4a3ecc622006-06-01 20:36:04 -0700751 prompt "IDMA channel for PCI 9 workaround"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000752 depends on 8260_PCI9
753
754config 8260_PCI9_IDMA1
755 bool "IDMA1"
756
757config 8260_PCI9_IDMA2
758 bool "IDMA2"
759
760config 8260_PCI9_IDMA3
761 bool "IDMA3"
762
763config 8260_PCI9_IDMA4
764 bool "IDMA4"
765
766endchoice
767
Jake Moilanenbb53bb32006-06-07 16:05:46 -0500768source "drivers/pci/pcie/Kconfig"
769
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000770source "drivers/pci/Kconfig"
771
772source "drivers/pcmcia/Kconfig"
773
774source "drivers/pci/hotplug/Kconfig"
775
Zhang Weif1f389d2008-04-18 13:33:39 -0700776config HAS_RAPIDIO
777 bool
778 default n
779
780config RAPIDIO
781 bool "RapidIO support"
782 depends on HAS_RAPIDIO
783 help
784 If you say Y here, the kernel will include drivers and
785 infrastructure code to support RapidIO interconnect devices.
786
787source "drivers/rapidio/Kconfig"
788
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000789endmenu
790
791menu "Advanced setup"
792 depends on PPC32
793
794config ADVANCED_OPTIONS
795 bool "Prompt for advanced kernel configuration options"
796 help
797 This option will enable prompting for a variety of advanced kernel
798 configuration options. These options can cause the kernel to not
799 work if they are set incorrectly, but can be used to optimize certain
800 aspects of kernel memory management.
801
802 Unless you know what you are doing, say N here.
803
804comment "Default settings for advanced configuration options are used"
805 depends on !ADVANCED_OPTIONS
806
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000807config LOWMEM_SIZE_BOOL
808 bool "Set maximum low memory"
809 depends on ADVANCED_OPTIONS
810 help
811 This option allows you to set the maximum amount of memory which
812 will be used as "low memory", that is, memory which the kernel can
813 access directly, without having to set up a kernel virtual mapping.
814 This can be useful in optimizing the layout of kernel virtual
815 memory.
816
817 Say N here unless you know what you are doing.
818
819config LOWMEM_SIZE
820 hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
821 default "0x30000000"
822
Trent Piepho96051462008-12-08 19:34:58 -0800823config LOWMEM_CAM_NUM_BOOL
824 bool "Set number of CAMs to use to map low memory"
825 depends on ADVANCED_OPTIONS && FSL_BOOKE
826 help
827 This option allows you to set the maximum number of CAM slots that
828 will be used to map low memory. There are a limited number of slots
829 available and even more limited number that will fit in the L1 MMU.
830 However, using more entries will allow mapping more low memory. This
831 can be useful in optimizing the layout of kernel virtual memory.
832
833 Say N here unless you know what you are doing.
834
835config LOWMEM_CAM_NUM
Josh Boyer9b71dbd2009-03-31 08:05:50 -0400836 depends on FSL_BOOKE
Trent Piepho96051462008-12-08 19:34:58 -0800837 int "Number of CAMs to use to map low memory" if LOWMEM_CAM_NUM_BOOL
838 default 3
839
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000840config RELOCATABLE
841 bool "Build a relocatable kernel (EXPERIMENTAL)"
842 depends on EXPERIMENTAL && ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
843 help
844 This builds a kernel image that is capable of running at the
845 location the kernel is loaded at (some alignment restrictions may
846 exist).
847
848 One use is for the kexec on panic case where the recovery kernel
849 must live at a different physical address than the primary
850 kernel.
851
852 Note: If CONFIG_RELOCATABLE=y, then the kernel runs from the address
853 it has been loaded at and the compile time physical addresses
854 CONFIG_PHYSICAL_START is ignored. However CONFIG_PHYSICAL_START
855 setting can still be useful to bootwrappers that need to know the
856 load location of the kernel (eg. u-boot/mkimage).
857
858config PAGE_OFFSET_BOOL
859 bool "Set custom page offset address"
860 depends on ADVANCED_OPTIONS
861 help
862 This option allows you to set the kernel virtual address at which
863 the kernel will map low memory. This can be useful in optimizing
864 the virtual memory layout of the system.
865
866 Say N here unless you know what you are doing.
867
868config PAGE_OFFSET
869 hex "Virtual address of memory base" if PAGE_OFFSET_BOOL
870 default "0xc0000000"
871
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000872config KERNEL_START_BOOL
873 bool "Set custom kernel base address"
874 depends on ADVANCED_OPTIONS
875 help
876 This option allows you to set the kernel virtual address at which
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000877 the kernel will be loaded. Normally this should match PAGE_OFFSET
878 however there are times (like kdump) that one might not want them
879 to be the same.
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000880
881 Say N here unless you know what you are doing.
882
883config KERNEL_START
884 hex "Virtual address of kernel base" if KERNEL_START_BOOL
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000885 default PAGE_OFFSET if PAGE_OFFSET_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500886 default "0xc2000000" if CRASH_DUMP && !RELOCATABLE
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000887 default "0xc0000000"
888
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000889config PHYSICAL_START_BOOL
890 bool "Set physical address where the kernel is loaded"
891 depends on ADVANCED_OPTIONS && FLATMEM && FSL_BOOKE
892 help
893 This gives the physical address where the kernel is loaded.
894
895 Say N here unless you know what you are doing.
896
897config PHYSICAL_START
898 hex "Physical address where the kernel is loaded" if PHYSICAL_START_BOOL
Matthew McClintockf933a412010-07-21 16:14:53 -0500899 default "0x02000000" if PPC_STD_MMU && CRASH_DUMP && !RELOCATABLE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000900 default "0x00000000"
901
902config PHYSICAL_ALIGN
903 hex
Trent Piephoc8f35702008-12-08 19:34:59 -0800904 default "0x04000000" if FSL_BOOKE
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000905 help
906 This value puts the alignment restrictions on physical address
907 where kernel is loaded and run from. Kernel is compiled for an
908 address which meets above alignment restriction.
909
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000910config TASK_SIZE_BOOL
911 bool "Set custom user task size"
912 depends on ADVANCED_OPTIONS
913 help
914 This option allows you to set the amount of virtual address space
915 allocated to user tasks. This can be useful in optimizing the
916 virtual memory layout of the system.
917
918 Say N here unless you know what you are doing.
919
920config TASK_SIZE
921 hex "Size of user task space" if TASK_SIZE_BOOL
Kumar Gala4d9e55102007-10-11 13:40:21 -0500922 default "0x80000000" if PPC_PREP || PPC_8xx
923 default "0xc0000000"
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000924
Benjamin Herrenschmidt84532a02009-05-27 13:33:14 +1000925config CONSISTENT_SIZE_BOOL
926 bool "Set custom consistent memory pool size"
927 depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
928 help
929 This option allows you to set the size of the
930 consistent memory pool. This pool of virtual memory
931 is used to make consistent memory allocations.
932
933config CONSISTENT_SIZE
934 hex "Size of consistent memory pool" if CONSISTENT_SIZE_BOOL
935 default "0x00200000" if NOT_COHERENT_CACHE
936
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000937config PIN_TLB
938 bool "Pinned Kernel TLBs (860 ONLY)"
939 depends on ADVANCED_OPTIONS && 8xx
940endmenu
941
Stephen Rothwellcabb55872005-09-30 16:16:52 +1000942if PPC64
Paul Mackerras549e8152008-08-30 11:43:47 +1000943config RELOCATABLE
944 bool "Build a relocatable kernel"
945 help
946 This builds a kernel image that is capable of running anywhere
947 in the RMA (real memory area) at any 16k-aligned base address.
948 The kernel is linked as a position-independent executable (PIE)
949 and contains dynamic relocations which are processed early
950 in the bootup process.
951
952 One use is for the kexec on panic case where the recovery kernel
953 must live at a different physical address than the primary
954 kernel.
955
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000956config PAGE_OFFSET
Stephen Rothwellcabb55872005-09-30 16:16:52 +1000957 hex
Stephen Rothwelleeb2d212005-09-30 17:24:15 +1000958 default "0xc000000000000000"
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000959config KERNEL_START
960 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000961 default "0xc000000000000000"
962config PHYSICAL_START
963 hex
Kumar Gala37dd2ba2008-04-22 04:22:34 +1000964 default "0x00000000"
Stephen Rothwellcabb55872005-09-30 16:16:52 +1000965endif
966
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000967source "net/Kconfig"
968
969source "drivers/Kconfig"
970
971source "fs/Kconfig"
972
Li Yang98658532006-10-03 23:10:46 -0500973source "arch/powerpc/sysdev/qe_lib/Kconfig"
974
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000975source "lib/Kconfig"
976
Paul Mackerras14cf11a2005-09-26 16:04:21 +1000977source "arch/powerpc/Kconfig.debug"
978
979source "security/Kconfig"
980
981config KEYS_COMPAT
982 bool
983 depends on COMPAT && KEYS
984 default y
985
986source "crypto/Kconfig"
Domen Puncer6f668282007-09-21 00:00:11 +1000987
988config PPC_CLOCK
989 bool
990 default n
David Brownell9483a572008-07-23 21:26:48 -0700991 select HAVE_CLK
Sylvain Munaut1088a202007-09-16 20:53:25 +1000992
993config PPC_LIB_RHEAP
994 bool
995
Hollis Blanchardbbf45ba2008-04-16 23:28:09 -0500996source "arch/powerpc/kvm/Kconfig"