xen-scsifront: don't deadlock if the ring becomes full
[deliverable/linux.git] / arch / arm / Kconfig
CommitLineData
1da177e4
LT
1config ARM
2 bool
3 default y
b1b3f49c
RK
4 select ARCH_BINFMT_ELF_RANDOMIZE_PIE
5 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
3d06770e 6 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
171b3f0d 7 select ARCH_HAVE_CUSTOM_GPIO_H
d7018848 8 select ARCH_MIGHT_HAVE_PC_PARPORT
4badad35 9 select ARCH_SUPPORTS_ATOMIC_RMW
017f161a 10 select ARCH_USE_BUILTIN_BSWAP
0cbad9c9 11 select ARCH_USE_CMPXCHG_LOCKREF
b1b3f49c 12 select ARCH_WANT_IPC_PARSE_VERSION
ee951c63 13 select BUILDTIME_EXTABLE_SORT if MMU
171b3f0d 14 select CLONE_BACKWARDS
b1b3f49c 15 select CPU_PM if (SUSPEND || CPU_IDLE)
dce5c9e3 16 select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
4477ca45 17 select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
b1b3f49c 18 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
171b3f0d 19 select GENERIC_IDLE_POLL_SETUP
b1b3f49c
RK
20 select GENERIC_IRQ_PROBE
21 select GENERIC_IRQ_SHOW
b1b3f49c 22 select GENERIC_PCI_IOMAP
38ff87f7 23 select GENERIC_SCHED_CLOCK
b1b3f49c
RK
24 select GENERIC_SMP_IDLE_THREAD
25 select GENERIC_STRNCPY_FROM_USER
26 select GENERIC_STRNLEN_USER
27 select HARDIRQS_SW_RESEND
7a017721 28 select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
09f05d85 29 select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
5cbad0eb 30 select HAVE_ARCH_KGDB
91702175 31 select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
0693bf68 32 select HAVE_ARCH_TRACEHOOK
b1b3f49c 33 select HAVE_BPF_JIT
51aaf81f 34 select HAVE_CC_STACKPROTECTOR
171b3f0d 35 select HAVE_CONTEXT_TRACKING
b1b3f49c
RK
36 select HAVE_C_RECORDMCOUNT
37 select HAVE_DEBUG_KMEMLEAK
38 select HAVE_DMA_API_DEBUG
39 select HAVE_DMA_ATTRS
40 select HAVE_DMA_CONTIGUOUS if MMU
80be7a7f 41 select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
dce5c9e3 42 select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
b1b3f49c 43 select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
0e341af8 44 select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
b1b3f49c 45 select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
1fe53268 46 select HAVE_GENERIC_DMA_COHERENT
b1b3f49c
RK
47 select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
48 select HAVE_IDE if PCI || ISA || PCMCIA
87c46b6c 49 select HAVE_IRQ_TIME_ACCOUNTING
e7db7b42 50 select HAVE_KERNEL_GZIP
f9b493ac 51 select HAVE_KERNEL_LZ4
6e8699f7 52 select HAVE_KERNEL_LZMA
b1b3f49c 53 select HAVE_KERNEL_LZO
a7f464f3 54 select HAVE_KERNEL_XZ
b1b3f49c
RK
55 select HAVE_KPROBES if !XIP_KERNEL
56 select HAVE_KRETPROBES if (HAVE_KPROBES)
57 select HAVE_MEMBLOCK
171b3f0d 58 select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
b1b3f49c 59 select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
7ada189f 60 select HAVE_PERF_EVENTS
49863894
WD
61 select HAVE_PERF_REGS
62 select HAVE_PERF_USER_STACK_DUMP
e513f8bf 63 select HAVE_REGS_AND_STACK_ACCESS_API
b1b3f49c 64 select HAVE_SYSCALL_TRACEPOINTS
af1839eb 65 select HAVE_UID16
31c1fc81 66 select HAVE_VIRT_CPU_ACCOUNTING_GEN
da0ec6f7 67 select IRQ_FORCED_THREADING
171b3f0d 68 select MODULES_USE_ELF_REL
84f452b1 69 select NO_BOOTMEM
171b3f0d
RK
70 select OLD_SIGACTION
71 select OLD_SIGSUSPEND3
b1b3f49c
RK
72 select PERF_USE_VMALLOC
73 select RTC_LIB
74 select SYS_SUPPORTS_APM_EMULATION
171b3f0d
RK
75 # Above selects are sorted alphabetically; please add new ones
76 # according to that. Thanks.
1da177e4
LT
77 help
78 The ARM series is a line of low-power-consumption RISC chip designs
f6c8965a 79 licensed by ARM Ltd and targeted at embedded applications and
1da177e4 80 handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
f6c8965a 81 manufactured, but legacy ARM-based PC hardware remains popular in
1da177e4
LT
82 Europe. There is an ARM Linux project with a web page at
83 <http://www.arm.linux.org.uk/>.
84
74facffe 85config ARM_HAS_SG_CHAIN
308c09f1 86 select ARCH_HAS_SG_CHAIN
74facffe
RK
87 bool
88
4ce63fcd
MS
89config NEED_SG_DMA_LENGTH
90 bool
91
92config ARM_DMA_USE_IOMMU
4ce63fcd 93 bool
b1b3f49c
RK
94 select ARM_HAS_SG_CHAIN
95 select NEED_SG_DMA_LENGTH
4ce63fcd 96
60460abf
SWK
97if ARM_DMA_USE_IOMMU
98
99config ARM_DMA_IOMMU_ALIGNMENT
100 int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
101 range 4 9
102 default 8
103 help
104 DMA mapping framework by default aligns all buffers to the smallest
105 PAGE_SIZE order which is greater than or equal to the requested buffer
106 size. This works well for buffers up to a few hundreds kilobytes, but
107 for larger buffers it just a waste of address space. Drivers which has
108 relatively small addressing window (like 64Mib) might run out of
109 virtual space with just a few allocations.
110
111 With this parameter you can specify the maximum PAGE_SIZE order for
112 DMA IOMMU buffers. Larger buffers will be aligned only to this
113 specified order. The order is expressed as a power of two multiplied
114 by the PAGE_SIZE.
115
116endif
117
0b05da72
HUK
118config MIGHT_HAVE_PCI
119 bool
120
75e7153a
RB
121config SYS_SUPPORTS_APM_EMULATION
122 bool
123
bc581770
LW
124config HAVE_TCM
125 bool
126 select GENERIC_ALLOCATOR
127
e119bfff
RK
128config HAVE_PROC_CPU
129 bool
130
ce816fa8 131config NO_IOPORT_MAP
5ea81769 132 bool
5ea81769 133
1da177e4
LT
134config EISA
135 bool
136 ---help---
137 The Extended Industry Standard Architecture (EISA) bus was
138 developed as an open alternative to the IBM MicroChannel bus.
139
140 The EISA bus provided some of the features of the IBM MicroChannel
141 bus while maintaining backward compatibility with cards made for
142 the older ISA bus. The EISA bus saw limited use between 1988 and
143 1995 when it was made obsolete by the PCI bus.
144
145 Say Y here if you are building a kernel for an EISA-based machine.
146
147 Otherwise, say N.
148
149config SBUS
150 bool
151
f16fb1ec
RK
152config STACKTRACE_SUPPORT
153 bool
154 default y
155
f76e9154
NP
156config HAVE_LATENCYTOP_SUPPORT
157 bool
158 depends on !SMP
159 default y
160
f16fb1ec
RK
161config LOCKDEP_SUPPORT
162 bool
163 default y
164
7ad1bcb2
RK
165config TRACE_IRQFLAGS_SUPPORT
166 bool
167 default y
168
1da177e4
LT
169config RWSEM_XCHGADD_ALGORITHM
170 bool
8a87411b 171 default y
1da177e4 172
f0d1b0b3
DH
173config ARCH_HAS_ILOG2_U32
174 bool
f0d1b0b3
DH
175
176config ARCH_HAS_ILOG2_U64
177 bool
f0d1b0b3 178
4a1b5733
EV
179config ARCH_HAS_BANDGAP
180 bool
181
b89c3b16
AM
182config GENERIC_HWEIGHT
183 bool
184 default y
185
1da177e4
LT
186config GENERIC_CALIBRATE_DELAY
187 bool
188 default y
189
a08b6b79
Z
190config ARCH_MAY_HAVE_PC_FDC
191 bool
192
5ac6da66
CL
193config ZONE_DMA
194 bool
5ac6da66 195
ccd7ab7f
FT
196config NEED_DMA_MAP_STATE
197 def_bool y
198
c7edc9e3
DL
199config ARCH_SUPPORTS_UPROBES
200 def_bool y
201
58af4a24
RH
202config ARCH_HAS_DMA_SET_COHERENT_MASK
203 bool
204
1da177e4
LT
205config GENERIC_ISA_DMA
206 bool
207
1da177e4
LT
208config FIQ
209 bool
210
13a5045d
RH
211config NEED_RET_TO_USER
212 bool
213
034d2f5a
AV
214config ARCH_MTD_XIP
215 bool
216
c760fc19
HC
217config VECTORS_BASE
218 hex
6afd6fae 219 default 0xffff0000 if MMU || CPU_HIGH_VECTOR
c760fc19
HC
220 default DRAM_BASE if REMAP_VECTORS_TO_RAM
221 default 0x00000000
222 help
19accfd3
RK
223 The base address of exception vectors. This must be two pages
224 in size.
c760fc19 225
dc21af99 226config ARM_PATCH_PHYS_VIRT
c1becedc
RK
227 bool "Patch physical to virtual translations at runtime" if EMBEDDED
228 default y
b511d75d 229 depends on !XIP_KERNEL && MMU
dc21af99
RK
230 depends on !ARCH_REALVIEW || !SPARSEMEM
231 help
111e9a5c
RK
232 Patch phys-to-virt and virt-to-phys translation functions at
233 boot and module load time according to the position of the
234 kernel in system memory.
dc21af99 235
111e9a5c 236 This can only be used with non-XIP MMU kernels where the base
daece596 237 of physical memory is at a 16MB boundary.
dc21af99 238
c1becedc
RK
239 Only disable this option if you know that you do not require
240 this feature (eg, building a kernel for a single machine) and
241 you need to shrink the kernel to the minimal size.
dc21af99 242
c334bc15
RH
243config NEED_MACH_IO_H
244 bool
245 help
246 Select this when mach/io.h is required to provide special
247 definitions for this platform. The need for mach/io.h should
248 be avoided when possible.
249
0cdc8b92 250config NEED_MACH_MEMORY_H
1b9f95f8
NP
251 bool
252 help
0cdc8b92
NP
253 Select this when mach/memory.h is required to provide special
254 definitions for this platform. The need for mach/memory.h should
255 be avoided when possible.
dc21af99 256
1b9f95f8 257config PHYS_OFFSET
974c0724 258 hex "Physical address of main memory" if MMU
c6f54a9b 259 depends on !ARM_PATCH_PHYS_VIRT
974c0724 260 default DRAM_BASE if !MMU
c6f54a9b
UKK
261 default 0x00000000 if ARCH_EBSA110 || \
262 EP93XX_SDCE3_SYNC_PHYS_OFFSET || \
263 ARCH_FOOTBRIDGE || \
264 ARCH_INTEGRATOR || \
265 ARCH_IOP13XX || \
266 ARCH_KS8695 || \
267 (ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
268 default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
269 default 0x20000000 if ARCH_S5PV210
270 default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
271 default 0xc0000000 if EP93XX_SDCE0_PHYS_OFFSET || ARCH_SA1100
272 default 0xd0000000 if EP93XX_SDCE1_PHYS_OFFSET
273 default 0xe0000000 if EP93XX_SDCE2_PHYS_OFFSET
274 default 0xf0000000 if EP93XX_SDCE3_ASYNC_PHYS_OFFSET
111e9a5c 275 help
1b9f95f8
NP
276 Please provide the physical address corresponding to the
277 location of main memory in your system.
cada3c08 278
87e040b6
SG
279config GENERIC_BUG
280 def_bool y
281 depends on BUG
282
1da177e4
LT
283source "init/Kconfig"
284
dc52ddc0
MH
285source "kernel/Kconfig.freezer"
286
1da177e4
LT
287menu "System Type"
288
3c427975
HC
289config MMU
290 bool "MMU-based Paged Memory Management Support"
291 default y
292 help
293 Select if you want MMU-based virtualised addressing space
294 support by paged memory management. If unsure, say 'Y'.
295
ccf50e23
RK
296#
297# The "ARM system type" choice list is ordered alphabetically by option
298# text. Please add new entries in the option alphabetic order.
299#
1da177e4
LT
300choice
301 prompt "ARM system type"
1420b22b
AB
302 default ARCH_VERSATILE if !MMU
303 default ARCH_MULTIPLATFORM if MMU
1da177e4 304
387798b3
RH
305config ARCH_MULTIPLATFORM
306 bool "Allow multiple platforms to be selected"
b1b3f49c 307 depends on MMU
ddb902cc 308 select ARCH_WANT_OPTIONAL_GPIOLIB
42dc836d 309 select ARM_HAS_SG_CHAIN
387798b3
RH
310 select ARM_PATCH_PHYS_VIRT
311 select AUTO_ZRELADDR
6d0add40 312 select CLKSRC_OF
66314223 313 select COMMON_CLK
ddb902cc 314 select GENERIC_CLOCKEVENTS
08d38beb 315 select MIGHT_HAVE_PCI
387798b3 316 select MULTI_IRQ_HANDLER
66314223
DN
317 select SPARSE_IRQ
318 select USE_OF
66314223 319
4af6fee1
DS
320config ARCH_INTEGRATOR
321 bool "ARM Ltd. Integrator family"
b1b3f49c 322 select ARM_AMBA
91942d17 323 select ARM_PATCH_PHYS_VIRT if MMU
fe989145 324 select AUTO_ZRELADDR
a613163d 325 select COMMON_CLK
f9a6aa43 326 select COMMON_CLK_VERSATILE
b1b3f49c 327 select GENERIC_CLOCKEVENTS
9904f793 328 select HAVE_TCM
c5a0adb5 329 select ICST
b1b3f49c 330 select MULTI_IRQ_HANDLER
f4b8b319 331 select PLAT_VERSATILE
695436e3 332 select SPARSE_IRQ
d7057e1d 333 select USE_OF
2389d501 334 select VERSATILE_FPGA_IRQ
4af6fee1
DS
335 help
336 Support for ARM's Integrator platform.
337
338config ARCH_REALVIEW
339 bool "ARM Ltd. RealView family"
b1b3f49c 340 select ARCH_WANT_OPTIONAL_GPIOLIB
4af6fee1 341 select ARM_AMBA
b1b3f49c 342 select ARM_TIMER_SP804
f9a6aa43
LW
343 select COMMON_CLK
344 select COMMON_CLK_VERSATILE
ae30ceac 345 select GENERIC_CLOCKEVENTS
b56ba8aa 346 select GPIO_PL061 if GPIOLIB
b1b3f49c 347 select ICST
0cdc8b92 348 select NEED_MACH_MEMORY_H
b1b3f49c 349 select PLAT_VERSATILE
4af6fee1
DS
350 help
351 This enables support for ARM Ltd RealView boards.
352
353config ARCH_VERSATILE
354 bool "ARM Ltd. Versatile family"
b1b3f49c 355 select ARCH_WANT_OPTIONAL_GPIOLIB
4af6fee1 356 select ARM_AMBA
b1b3f49c 357 select ARM_TIMER_SP804
4af6fee1 358 select ARM_VIC
6d803ba7 359 select CLKDEV_LOOKUP
b1b3f49c 360 select GENERIC_CLOCKEVENTS
aa3831cf 361 select HAVE_MACH_CLKDEV
c5a0adb5 362 select ICST
f4b8b319 363 select PLAT_VERSATILE
b1b3f49c 364 select PLAT_VERSATILE_CLOCK
2389d501 365 select VERSATILE_FPGA_IRQ
4af6fee1
DS
366 help
367 This enables support for ARM Ltd Versatile board.
368
8fc5ffa0
AV
369config ARCH_AT91
370 bool "Atmel AT91"
f373e8c0 371 select ARCH_REQUIRE_GPIOLIB
bd602995 372 select CLKDEV_LOOKUP
e261501d 373 select IRQ_DOMAIN
1ac02d79 374 select NEED_MACH_IO_H if PCCARD
6732ae5c
JCPV
375 select PINCTRL
376 select PINCTRL_AT91 if USE_OF
4af6fee1 377 help
929e994f
NF
378 This enables support for systems based on Atmel
379 AT91RM9200 and AT91SAM9* processors.
4af6fee1 380
93e22567
RK
381config ARCH_CLPS711X
382 bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
a3b8d4a5 383 select ARCH_REQUIRE_GPIOLIB
ea7d1bc9 384 select AUTO_ZRELADDR
c99f72ad 385 select CLKSRC_MMIO
93e22567
RK
386 select COMMON_CLK
387 select CPU_ARM720T
4a8355c4 388 select GENERIC_CLOCKEVENTS
6597619f 389 select MFD_SYSCON
93e22567
RK
390 help
391 Support for Cirrus Logic 711x/721x/731x based boards.
392
788c9700
RK
393config ARCH_GEMINI
394 bool "Cortina Systems Gemini"
788c9700 395 select ARCH_REQUIRE_GPIOLIB
f3372c01 396 select CLKSRC_MMIO
b1b3f49c 397 select CPU_FA526
f3372c01 398 select GENERIC_CLOCKEVENTS
788c9700
RK
399 help
400 Support for the Cortina Systems Gemini family SoCs
401
1da177e4
LT
402config ARCH_EBSA110
403 bool "EBSA-110"
b1b3f49c 404 select ARCH_USES_GETTIMEOFFSET
c750815e 405 select CPU_SA110
f7e68bbf 406 select ISA
c334bc15 407 select NEED_MACH_IO_H
0cdc8b92 408 select NEED_MACH_MEMORY_H
ce816fa8 409 select NO_IOPORT_MAP
1da177e4
LT
410 help
411 This is an evaluation board for the StrongARM processor available
f6c8965a 412 from Digital. It has limited hardware on-board, including an
1da177e4
LT
413 Ethernet interface, two PCMCIA sockets, two serial ports and a
414 parallel port.
415
6d85e2b0
UKK
416config ARCH_EFM32
417 bool "Energy Micro efm32"
418 depends on !MMU
419 select ARCH_REQUIRE_GPIOLIB
420 select ARM_NVIC
51aaf81f 421 select AUTO_ZRELADDR
6d85e2b0
UKK
422 select CLKSRC_OF
423 select COMMON_CLK
424 select CPU_V7M
425 select GENERIC_CLOCKEVENTS
426 select NO_DMA
ce816fa8 427 select NO_IOPORT_MAP
6d85e2b0
UKK
428 select SPARSE_IRQ
429 select USE_OF
430 help
431 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
432 processors.
433
e7736d47
LB
434config ARCH_EP93XX
435 bool "EP93xx-based"
b1b3f49c
RK
436 select ARCH_HAS_HOLES_MEMORYMODEL
437 select ARCH_REQUIRE_GPIOLIB
438 select ARCH_USES_GETTIMEOFFSET
e7736d47
LB
439 select ARM_AMBA
440 select ARM_VIC
6d803ba7 441 select CLKDEV_LOOKUP
b1b3f49c 442 select CPU_ARM920T
e7736d47
LB
443 help
444 This enables support for the Cirrus EP93xx series of CPUs.
445
1da177e4
LT
446config ARCH_FOOTBRIDGE
447 bool "FootBridge"
c750815e 448 select CPU_SA110
1da177e4 449 select FOOTBRIDGE
4e8d7637 450 select GENERIC_CLOCKEVENTS
d0ee9f40 451 select HAVE_IDE
8ef6e620 452 select NEED_MACH_IO_H if !MMU
0cdc8b92 453 select NEED_MACH_MEMORY_H
f999b8bd
MM
454 help
455 Support for systems based on the DC21285 companion chip
456 ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
1da177e4 457
4af6fee1
DS
458config ARCH_NETX
459 bool "Hilscher NetX based"
b1b3f49c 460 select ARM_VIC
234b6ced 461 select CLKSRC_MMIO
c750815e 462 select CPU_ARM926T
2fcfe6b8 463 select GENERIC_CLOCKEVENTS
f999b8bd 464 help
4af6fee1
DS
465 This enables support for systems based on the Hilscher NetX Soc
466
3b938be6
RK
467config ARCH_IOP13XX
468 bool "IOP13xx-based"
469 depends on MMU
b1b3f49c 470 select CPU_XSC3
0cdc8b92 471 select NEED_MACH_MEMORY_H
13a5045d 472 select NEED_RET_TO_USER
b1b3f49c
RK
473 select PCI
474 select PLAT_IOP
475 select VMSPLIT_1G
37ebbcff 476 select SPARSE_IRQ
3b938be6
RK
477 help
478 Support for Intel's IOP13XX (XScale) family of processors.
479
3f7e5815
LB
480config ARCH_IOP32X
481 bool "IOP32x-based"
a4f7e763 482 depends on MMU
b1b3f49c 483 select ARCH_REQUIRE_GPIOLIB
c750815e 484 select CPU_XSCALE
e9004f50 485 select GPIO_IOP
13a5045d 486 select NEED_RET_TO_USER
f7e68bbf 487 select PCI
b1b3f49c 488 select PLAT_IOP
f999b8bd 489 help
3f7e5815
LB
490 Support for Intel's 80219 and IOP32X (XScale) family of
491 processors.
492
493config ARCH_IOP33X
494 bool "IOP33x-based"
495 depends on MMU
b1b3f49c 496 select ARCH_REQUIRE_GPIOLIB
c750815e 497 select CPU_XSCALE
e9004f50 498 select GPIO_IOP
13a5045d 499 select NEED_RET_TO_USER
3f7e5815 500 select PCI
b1b3f49c 501 select PLAT_IOP
3f7e5815
LB
502 help
503 Support for Intel's IOP33X (XScale) family of processors.
1da177e4 504
3b938be6
RK
505config ARCH_IXP4XX
506 bool "IXP4xx-based"
a4f7e763 507 depends on MMU
58af4a24 508 select ARCH_HAS_DMA_SET_COHERENT_MASK
b1b3f49c 509 select ARCH_REQUIRE_GPIOLIB
51aaf81f 510 select ARCH_SUPPORTS_BIG_ENDIAN
234b6ced 511 select CLKSRC_MMIO
c750815e 512 select CPU_XSCALE
b1b3f49c 513 select DMABOUNCE if PCI
3b938be6 514 select GENERIC_CLOCKEVENTS
0b05da72 515 select MIGHT_HAVE_PCI
c334bc15 516 select NEED_MACH_IO_H
9296d94d 517 select USB_EHCI_BIG_ENDIAN_DESC
171b3f0d 518 select USB_EHCI_BIG_ENDIAN_MMIO
c4713074 519 help
3b938be6 520 Support for Intel's IXP4XX (XScale) family of processors.
c4713074 521
edabd38e
SB
522config ARCH_DOVE
523 bool "Marvell Dove"
edabd38e 524 select ARCH_REQUIRE_GPIOLIB
756b2531 525 select CPU_PJ4
edabd38e 526 select GENERIC_CLOCKEVENTS
0f81bd43 527 select MIGHT_HAVE_PCI
171b3f0d 528 select MVEBU_MBUS
9139acd1
SH
529 select PINCTRL
530 select PINCTRL_DOVE
abcda1dc 531 select PLAT_ORION_LEGACY
edabd38e
SB
532 help
533 Support for the Marvell Dove SoC 88AP510
534
794d15b2
SS
535config ARCH_MV78XX0
536 bool "Marvell MV78xx0"
a8865655 537 select ARCH_REQUIRE_GPIOLIB
b1b3f49c 538 select CPU_FEROCEON
794d15b2 539 select GENERIC_CLOCKEVENTS
171b3f0d 540 select MVEBU_MBUS
b1b3f49c 541 select PCI
abcda1dc 542 select PLAT_ORION_LEGACY
794d15b2
SS
543 help
544 Support for the following Marvell MV78xx0 series SoCs:
545 MV781x0, MV782x0.
546
9dd0b194 547config ARCH_ORION5X
585cf175
TP
548 bool "Marvell Orion"
549 depends on MMU
a8865655 550 select ARCH_REQUIRE_GPIOLIB
b1b3f49c 551 select CPU_FEROCEON
51cbff1d 552 select GENERIC_CLOCKEVENTS
171b3f0d 553 select MVEBU_MBUS
b1b3f49c 554 select PCI
abcda1dc 555 select PLAT_ORION_LEGACY
585cf175 556 help
9dd0b194 557 Support for the following Marvell Orion 5x series SoCs:
d2b2a6bb 558 Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
d323ade1 559 Orion-2 (5281), Orion-1-90 (6183).
585cf175 560
788c9700 561config ARCH_MMP
2f7e8fae 562 bool "Marvell PXA168/910/MMP2"
788c9700 563 depends on MMU
788c9700 564 select ARCH_REQUIRE_GPIOLIB
6d803ba7 565 select CLKDEV_LOOKUP
b1b3f49c 566 select GENERIC_ALLOCATOR
788c9700 567 select GENERIC_CLOCKEVENTS
157d2644 568 select GPIO_PXA
c24b3114 569 select IRQ_DOMAIN
0f374561 570 select MULTI_IRQ_HANDLER
7c8f86a4 571 select PINCTRL
788c9700 572 select PLAT_PXA
0bd86961 573 select SPARSE_IRQ
788c9700 574 help
2f7e8fae 575 Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
788c9700
RK
576
577config ARCH_KS8695
578 bool "Micrel/Kendin KS8695"
98830bc9 579 select ARCH_REQUIRE_GPIOLIB
c7e783d6 580 select CLKSRC_MMIO
b1b3f49c 581 select CPU_ARM922T
c7e783d6 582 select GENERIC_CLOCKEVENTS
b1b3f49c 583 select NEED_MACH_MEMORY_H
788c9700
RK
584 help
585 Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
586 System-on-Chip devices.
587
788c9700
RK
588config ARCH_W90X900
589 bool "Nuvoton W90X900 CPU"
c52d3d68 590 select ARCH_REQUIRE_GPIOLIB
6d803ba7 591 select CLKDEV_LOOKUP
6fa5d5f7 592 select CLKSRC_MMIO
b1b3f49c 593 select CPU_ARM926T
58b5369e 594 select GENERIC_CLOCKEVENTS
788c9700 595 help
a8bc4ead 596 Support for Nuvoton (Winbond logic dept.) ARM9 processor,
597 At present, the w90x900 has been renamed nuc900, regarding
598 the ARM series product line, you can login the following
599 link address to know more.
600
601 <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
602 ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
788c9700 603
93e22567
RK
604config ARCH_LPC32XX
605 bool "NXP LPC32XX"
606 select ARCH_REQUIRE_GPIOLIB
607 select ARM_AMBA
608 select CLKDEV_LOOKUP
609 select CLKSRC_MMIO
610 select CPU_ARM926T
611 select GENERIC_CLOCKEVENTS
612 select HAVE_IDE
93e22567
RK
613 select USE_OF
614 help
615 Support for the NXP LPC32XX family of processors
616
1da177e4 617config ARCH_PXA
2c8086a5 618 bool "PXA2xx/PXA3xx-based"
a4f7e763 619 depends on MMU
b1b3f49c
RK
620 select ARCH_MTD_XIP
621 select ARCH_REQUIRE_GPIOLIB
622 select ARM_CPU_SUSPEND if PM
623 select AUTO_ZRELADDR
6d803ba7 624 select CLKDEV_LOOKUP
234b6ced 625 select CLKSRC_MMIO
6f6caeaa 626 select CLKSRC_OF
981d0f39 627 select GENERIC_CLOCKEVENTS
157d2644 628 select GPIO_PXA
d0ee9f40 629 select HAVE_IDE
b1b3f49c 630 select MULTI_IRQ_HANDLER
b1b3f49c
RK
631 select PLAT_PXA
632 select SPARSE_IRQ
f999b8bd 633 help
2c8086a5 634 Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
1da177e4 635
8fc1b0f8
KG
636config ARCH_MSM
637 bool "Qualcomm MSM (non-multiplatform)"
923a081c 638 select ARCH_REQUIRE_GPIOLIB
8cc7f533 639 select COMMON_CLK
b1b3f49c 640 select GENERIC_CLOCKEVENTS
49cbe786 641 help
4b53eb4f
DW
642 Support for Qualcomm MSM/QSD based systems. This runs on the
643 apps processor of the MSM/QSD and depends on a shared memory
644 interface to the modem processor which runs the baseband
645 stack and controls some vital subsystems
646 (clock and power control, etc).
49cbe786 647
bf98c1ea 648config ARCH_SHMOBILE_LEGACY
0d9fd616 649 bool "Renesas ARM SoCs (non-multiplatform)"
bf98c1ea 650 select ARCH_SHMOBILE
91942d17 651 select ARM_PATCH_PHYS_VIRT if MMU
5e93c6b4 652 select CLKDEV_LOOKUP
b1b3f49c 653 select GENERIC_CLOCKEVENTS
4c3ffffd 654 select HAVE_ARM_SCU if SMP
a894fcc2 655 select HAVE_ARM_TWD if SMP
aa3831cf 656 select HAVE_MACH_CLKDEV
3b55658a 657 select HAVE_SMP
ce5ea9f3 658 select MIGHT_HAVE_CACHE_L2X0
60f1435c 659 select MULTI_IRQ_HANDLER
ce816fa8 660 select NO_IOPORT_MAP
2cd3c927 661 select PINCTRL
b1b3f49c
RK
662 select PM_GENERIC_DOMAINS if PM
663 select SPARSE_IRQ
c793c1b0 664 help
0d9fd616
LP
665 Support for Renesas ARM SoC platforms using a non-multiplatform
666 kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car
667 and RZ families.
c793c1b0 668
1da177e4
LT
669config ARCH_RPC
670 bool "RiscPC"
671 select ARCH_ACORN
a08b6b79 672 select ARCH_MAY_HAVE_PC_FDC
07f841b7 673 select ARCH_SPARSEMEM_ENABLE
5cfc8ee0 674 select ARCH_USES_GETTIMEOFFSET
fa04e209 675 select CPU_SA110
b1b3f49c 676 select FIQ
d0ee9f40 677 select HAVE_IDE
b1b3f49c
RK
678 select HAVE_PATA_PLATFORM
679 select ISA_DMA_API
c334bc15 680 select NEED_MACH_IO_H
0cdc8b92 681 select NEED_MACH_MEMORY_H
ce816fa8 682 select NO_IOPORT_MAP
b4811bac 683 select VIRT_TO_BUS
1da177e4
LT
684 help
685 On the Acorn Risc-PC, Linux can support the internal IDE disk and
686 CD-ROM interface, serial and parallel port, and the floppy drive.
687
688config ARCH_SA1100
689 bool "SA1100-based"
b1b3f49c
RK
690 select ARCH_MTD_XIP
691 select ARCH_REQUIRE_GPIOLIB
692 select ARCH_SPARSEMEM_ENABLE
693 select CLKDEV_LOOKUP
694 select CLKSRC_MMIO
1937f5b9 695 select CPU_FREQ
b1b3f49c 696 select CPU_SA1100
3e238be2 697 select GENERIC_CLOCKEVENTS
d0ee9f40 698 select HAVE_IDE
b1b3f49c 699 select ISA
0cdc8b92 700 select NEED_MACH_MEMORY_H
375dec92 701 select SPARSE_IRQ
f999b8bd
MM
702 help
703 Support for StrongARM 11x0 based boards.
1da177e4 704
b130d5c2
KK
705config ARCH_S3C24XX
706 bool "Samsung S3C24XX SoCs"
53650430 707 select ARCH_REQUIRE_GPIOLIB
335cce74 708 select ATAGS
b1b3f49c 709 select CLKDEV_LOOKUP
4280506a 710 select CLKSRC_SAMSUNG_PWM
7f78b6eb 711 select GENERIC_CLOCKEVENTS
880cf071 712 select GPIO_SAMSUNG
20676c15 713 select HAVE_S3C2410_I2C if I2C
b130d5c2 714 select HAVE_S3C2410_WATCHDOG if WATCHDOG
b1b3f49c 715 select HAVE_S3C_RTC if RTC_CLASS
17453dd2 716 select MULTI_IRQ_HANDLER
c334bc15 717 select NEED_MACH_IO_H
cd8dc7ae 718 select SAMSUNG_ATAGS
1da177e4 719 help
b130d5c2
KK
720 Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
721 and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
722 (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
723 Samsung SMDK2410 development board (and derivatives).
63b1f51b 724
a08ab637
BD
725config ARCH_S3C64XX
726 bool "Samsung S3C64XX"
b1b3f49c 727 select ARCH_REQUIRE_GPIOLIB
1db0287a 728 select ARM_AMBA
89f0ce72 729 select ARM_VIC
335cce74 730 select ATAGS
b1b3f49c 731 select CLKDEV_LOOKUP
4280506a 732 select CLKSRC_SAMSUNG_PWM
ccecba3c 733 select COMMON_CLK_SAMSUNG
70bacadb 734 select CPU_V6K
04a49b71 735 select GENERIC_CLOCKEVENTS
880cf071 736 select GPIO_SAMSUNG
b1b3f49c
RK
737 select HAVE_S3C2410_I2C if I2C
738 select HAVE_S3C2410_WATCHDOG if WATCHDOG
6700397a 739 select HAVE_TCM
ce816fa8 740 select NO_IOPORT_MAP
b1b3f49c 741 select PLAT_SAMSUNG
4ab75a3f 742 select PM_GENERIC_DOMAINS if PM
b1b3f49c
RK
743 select S3C_DEV_NAND
744 select S3C_GPIO_TRACK
cd8dc7ae 745 select SAMSUNG_ATAGS
6e2d9e93 746 select SAMSUNG_WAKEMASK
88f59738 747 select SAMSUNG_WDT_RESET
a08ab637
BD
748 help
749 Samsung S3C64XX series based systems
750
7c6337e2
KH
751config ARCH_DAVINCI
752 bool "TI DaVinci"
b1b3f49c 753 select ARCH_HAS_HOLES_MEMORYMODEL
dce1115b 754 select ARCH_REQUIRE_GPIOLIB
6d803ba7 755 select CLKDEV_LOOKUP
20e9969b 756 select GENERIC_ALLOCATOR
b1b3f49c 757 select GENERIC_CLOCKEVENTS
dc7ad3b3 758 select GENERIC_IRQ_CHIP
b1b3f49c 759 select HAVE_IDE
3ad7a42d 760 select TI_PRIV_EDMA
689e331f 761 select USE_OF
b1b3f49c 762 select ZONE_DMA
7c6337e2
KH
763 help
764 Support for TI's DaVinci platform.
765
a0694861
TL
766config ARCH_OMAP1
767 bool "TI OMAP1"
00a36698 768 depends on MMU
9af915da 769 select ARCH_HAS_HOLES_MEMORYMODEL
a0694861 770 select ARCH_OMAP
21f47fbc 771 select ARCH_REQUIRE_GPIOLIB
b1b3f49c 772 select CLKDEV_LOOKUP
d6e15d78 773 select CLKSRC_MMIO
b1b3f49c 774 select GENERIC_CLOCKEVENTS
a0694861 775 select GENERIC_IRQ_CHIP
a0694861
TL
776 select HAVE_IDE
777 select IRQ_DOMAIN
778 select NEED_MACH_IO_H if PCCARD
779 select NEED_MACH_MEMORY_H
21f47fbc 780 help
a0694861 781 Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
02c981c0 782
1da177e4
LT
783endchoice
784
387798b3
RH
785menu "Multiple platform selection"
786 depends on ARCH_MULTIPLATFORM
787
788comment "CPU Core family selection"
789
f8afae40
AB
790config ARCH_MULTI_V4
791 bool "ARMv4 based platforms (FA526)"
792 depends on !ARCH_MULTI_V6_V7
793 select ARCH_MULTI_V4_V5
794 select CPU_FA526
795
387798b3
RH
796config ARCH_MULTI_V4T
797 bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
387798b3 798 depends on !ARCH_MULTI_V6_V7
b1b3f49c 799 select ARCH_MULTI_V4_V5
24e860fb
AB
800 select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
801 CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
802 CPU_ARM925T || CPU_ARM940T)
387798b3
RH
803
804config ARCH_MULTI_V5
805 bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
387798b3 806 depends on !ARCH_MULTI_V6_V7
b1b3f49c 807 select ARCH_MULTI_V4_V5
12567bbd 808 select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
24e860fb
AB
809 CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
810 CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
387798b3
RH
811
812config ARCH_MULTI_V4_V5
813 bool
814
815config ARCH_MULTI_V6
8dda05cc 816 bool "ARMv6 based platforms (ARM11)"
387798b3 817 select ARCH_MULTI_V6_V7
42f4754a 818 select CPU_V6K
387798b3
RH
819
820config ARCH_MULTI_V7
8dda05cc 821 bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
387798b3
RH
822 default y
823 select ARCH_MULTI_V6_V7
b1b3f49c 824 select CPU_V7
90bc8ac7 825 select HAVE_SMP
387798b3
RH
826
827config ARCH_MULTI_V6_V7
828 bool
9352b05b 829 select MIGHT_HAVE_CACHE_L2X0
387798b3
RH
830
831config ARCH_MULTI_CPU_AUTO
832 def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
833 select ARCH_MULTI_V5
834
835endmenu
836
05e2a3de
RH
837config ARCH_VIRT
838 bool "Dummy Virtual Machine" if ARCH_MULTI_V7
4b8b5f25 839 select ARM_AMBA
05e2a3de 840 select ARM_GIC
05e2a3de 841 select ARM_PSCI
4b8b5f25 842 select HAVE_ARM_ARCH_TIMER
05e2a3de 843
ccf50e23
RK
844#
845# This is sorted alphabetically by mach-* pathname. However, plat-*
846# Kconfigs may be included either alphabetically (according to the
847# plat- suffix) or along side the corresponding mach-* source.
848#
3e93a22b
GC
849source "arch/arm/mach-mvebu/Kconfig"
850
95b8f20f
RK
851source "arch/arm/mach-at91/Kconfig"
852
1d22924e
AB
853source "arch/arm/mach-axxia/Kconfig"
854
8ac49e04
CD
855source "arch/arm/mach-bcm/Kconfig"
856
1c37fa10
SH
857source "arch/arm/mach-berlin/Kconfig"
858
1da177e4
LT
859source "arch/arm/mach-clps711x/Kconfig"
860
d94f944e
AV
861source "arch/arm/mach-cns3xxx/Kconfig"
862
95b8f20f
RK
863source "arch/arm/mach-davinci/Kconfig"
864
865source "arch/arm/mach-dove/Kconfig"
866
e7736d47
LB
867source "arch/arm/mach-ep93xx/Kconfig"
868
1da177e4
LT
869source "arch/arm/mach-footbridge/Kconfig"
870
59d3a193
PZ
871source "arch/arm/mach-gemini/Kconfig"
872
387798b3
RH
873source "arch/arm/mach-highbank/Kconfig"
874
389ee0c2
HZ
875source "arch/arm/mach-hisi/Kconfig"
876
1da177e4
LT
877source "arch/arm/mach-integrator/Kconfig"
878
3f7e5815
LB
879source "arch/arm/mach-iop32x/Kconfig"
880
881source "arch/arm/mach-iop33x/Kconfig"
1da177e4 882
285f5fa7
DW
883source "arch/arm/mach-iop13xx/Kconfig"
884
1da177e4
LT
885source "arch/arm/mach-ixp4xx/Kconfig"
886
828989ad
SS
887source "arch/arm/mach-keystone/Kconfig"
888
95b8f20f
RK
889source "arch/arm/mach-ks8695/Kconfig"
890
95b8f20f
RK
891source "arch/arm/mach-msm/Kconfig"
892
17723fd3
JJ
893source "arch/arm/mach-moxart/Kconfig"
894
794d15b2
SS
895source "arch/arm/mach-mv78xx0/Kconfig"
896
3995eb82 897source "arch/arm/mach-imx/Kconfig"
1da177e4 898
f682a218
MB
899source "arch/arm/mach-mediatek/Kconfig"
900
1d3f33d5
SG
901source "arch/arm/mach-mxs/Kconfig"
902
95b8f20f 903source "arch/arm/mach-netx/Kconfig"
49cbe786 904
95b8f20f 905source "arch/arm/mach-nomadik/Kconfig"
95b8f20f 906
9851ca57
DT
907source "arch/arm/mach-nspire/Kconfig"
908
d48af15e
TL
909source "arch/arm/plat-omap/Kconfig"
910
911source "arch/arm/mach-omap1/Kconfig"
1da177e4 912
1dbae815
TL
913source "arch/arm/mach-omap2/Kconfig"
914
9dd0b194 915source "arch/arm/mach-orion5x/Kconfig"
585cf175 916
387798b3
RH
917source "arch/arm/mach-picoxcell/Kconfig"
918
95b8f20f
RK
919source "arch/arm/mach-pxa/Kconfig"
920source "arch/arm/plat-pxa/Kconfig"
585cf175 921
95b8f20f
RK
922source "arch/arm/mach-mmp/Kconfig"
923
8fc1b0f8
KG
924source "arch/arm/mach-qcom/Kconfig"
925
95b8f20f
RK
926source "arch/arm/mach-realview/Kconfig"
927
d63dc051
HS
928source "arch/arm/mach-rockchip/Kconfig"
929
95b8f20f 930source "arch/arm/mach-sa1100/Kconfig"
edabd38e 931
387798b3
RH
932source "arch/arm/mach-socfpga/Kconfig"
933
a7ed099f 934source "arch/arm/mach-spear/Kconfig"
a21765a7 935
65ebcc11
SK
936source "arch/arm/mach-sti/Kconfig"
937
85fd6d63 938source "arch/arm/mach-s3c24xx/Kconfig"
1da177e4 939
431107ea 940source "arch/arm/mach-s3c64xx/Kconfig"
a08ab637 941
170f4e42
KK
942source "arch/arm/mach-s5pv210/Kconfig"
943
83014579 944source "arch/arm/mach-exynos/Kconfig"
e509b289 945source "arch/arm/plat-samsung/Kconfig"
cc0e72b8 946
882d01f9 947source "arch/arm/mach-shmobile/Kconfig"
52c543f9 948
3b52634f
MR
949source "arch/arm/mach-sunxi/Kconfig"
950
156a0997
BS
951source "arch/arm/mach-prima2/Kconfig"
952
c5f80065
EG
953source "arch/arm/mach-tegra/Kconfig"
954
95b8f20f 955source "arch/arm/mach-u300/Kconfig"
1da177e4 956
95b8f20f 957source "arch/arm/mach-ux500/Kconfig"
1da177e4
LT
958
959source "arch/arm/mach-versatile/Kconfig"
960
ceade897 961source "arch/arm/mach-vexpress/Kconfig"
420c34e4 962source "arch/arm/plat-versatile/Kconfig"
ceade897 963
6f35f9a9
TP
964source "arch/arm/mach-vt8500/Kconfig"
965
7ec80ddf 966source "arch/arm/mach-w90x900/Kconfig"
967
9a45eb69
JC
968source "arch/arm/mach-zynq/Kconfig"
969
1da177e4
LT
970# Definitions to make life easier
971config ARCH_ACORN
972 bool
973
7ae1f7ec
LB
974config PLAT_IOP
975 bool
469d3044 976 select GENERIC_CLOCKEVENTS
7ae1f7ec 977
69b02f6a
LB
978config PLAT_ORION
979 bool
bfe45e0b 980 select CLKSRC_MMIO
b1b3f49c 981 select COMMON_CLK
dc7ad3b3 982 select GENERIC_IRQ_CHIP
278b45b0 983 select IRQ_DOMAIN
69b02f6a 984
abcda1dc
TP
985config PLAT_ORION_LEGACY
986 bool
987 select PLAT_ORION
988
bd5ce433
EM
989config PLAT_PXA
990 bool
991
f4b8b319
RK
992config PLAT_VERSATILE
993 bool
994
e3887714
RK
995config ARM_TIMER_SP804
996 bool
bfe45e0b 997 select CLKSRC_MMIO
7a0eca71 998 select CLKSRC_OF if OF
e3887714 999
d9a1beaa
AC
1000source "arch/arm/firmware/Kconfig"
1001
1da177e4
LT
1002source arch/arm/mm/Kconfig
1003
afe4b25e 1004config IWMMXT
d93003e8
SH
1005 bool "Enable iWMMXt support"
1006 depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
1007 default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
afe4b25e
LB
1008 help
1009 Enable support for iWMMXt context switching at run time if
1010 running on a CPU that supports it.
1011
52108641 1012config MULTI_IRQ_HANDLER
1013 bool
1014 help
1015 Allow each machine to specify it's own IRQ handler at run time.
1016
3b93e7b0
HC
1017if !MMU
1018source "arch/arm/Kconfig-nommu"
1019endif
1020
3e0a07f8
GC
1021config PJ4B_ERRATA_4742
1022 bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
1023 depends on CPU_PJ4B && MACH_ARMADA_370
1024 default y
1025 help
1026 When coming out of either a Wait for Interrupt (WFI) or a Wait for
1027 Event (WFE) IDLE states, a specific timing sensitivity exists between
1028 the retiring WFI/WFE instructions and the newly issued subsequent
1029 instructions. This sensitivity can result in a CPU hang scenario.
1030 Workaround:
1031 The software must insert either a Data Synchronization Barrier (DSB)
1032 or Data Memory Barrier (DMB) command immediately after the WFI/WFE
1033 instruction
1034
f0c4b8d6
WD
1035config ARM_ERRATA_326103
1036 bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1037 depends on CPU_V6
1038 help
1039 Executing a SWP instruction to read-only memory does not set bit 11
1040 of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1041 treat the access as a read, preventing a COW from occurring and
1042 causing the faulting task to livelock.
1043
9cba3ccc
CM
1044config ARM_ERRATA_411920
1045 bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
e399b1a4 1046 depends on CPU_V6 || CPU_V6K
9cba3ccc
CM
1047 help
1048 Invalidation of the Instruction Cache operation can
1049 fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1050 It does not affect the MPCore. This option enables the ARM Ltd.
1051 recommended workaround.
1052
7ce236fc
CM
1053config ARM_ERRATA_430973
1054 bool "ARM errata: Stale prediction on replaced interworking branch"
1055 depends on CPU_V7
1056 help
1057 This option enables the workaround for the 430973 Cortex-A8
1058 (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1059 interworking branch is replaced with another code sequence at the
1060 same virtual address, whether due to self-modifying code or virtual
1061 to physical address re-mapping, Cortex-A8 does not recover from the
1062 stale interworking branch prediction. This results in Cortex-A8
1063 executing the new code sequence in the incorrect ARM or Thumb state.
1064 The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1065 and also flushes the branch target cache at every context switch.
1066 Note that setting specific bits in the ACTLR register may not be
1067 available in non-secure mode.
1068
855c551f
CM
1069config ARM_ERRATA_458693
1070 bool "ARM errata: Processor deadlock when a false hazard is created"
1071 depends on CPU_V7
62e4d357 1072 depends on !ARCH_MULTIPLATFORM
855c551f
CM
1073 help
1074 This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1075 erratum. For very specific sequences of memory operations, it is
1076 possible for a hazard condition intended for a cache line to instead
1077 be incorrectly associated with a different cache line. This false
1078 hazard might then cause a processor deadlock. The workaround enables
1079 the L1 caching of the NEON accesses and disables the PLD instruction
1080 in the ACTLR register. Note that setting specific bits in the ACTLR
1081 register may not be available in non-secure mode.
1082
0516e464
CM
1083config ARM_ERRATA_460075
1084 bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1085 depends on CPU_V7
62e4d357 1086 depends on !ARCH_MULTIPLATFORM
0516e464
CM
1087 help
1088 This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1089 erratum. Any asynchronous access to the L2 cache may encounter a
1090 situation in which recent store transactions to the L2 cache are lost
1091 and overwritten with stale memory contents from external memory. The
1092 workaround disables the write-allocate mode for the L2 cache via the
1093 ACTLR register. Note that setting specific bits in the ACTLR register
1094 may not be available in non-secure mode.
1095
9f05027c
WD
1096config ARM_ERRATA_742230
1097 bool "ARM errata: DMB operation may be faulty"
1098 depends on CPU_V7 && SMP
62e4d357 1099 depends on !ARCH_MULTIPLATFORM
9f05027c
WD
1100 help
1101 This option enables the workaround for the 742230 Cortex-A9
1102 (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1103 between two write operations may not ensure the correct visibility
1104 ordering of the two writes. This workaround sets a specific bit in
1105 the diagnostic register of the Cortex-A9 which causes the DMB
1106 instruction to behave as a DSB, ensuring the correct behaviour of
1107 the two writes.
1108
a672e99b
WD
1109config ARM_ERRATA_742231
1110 bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1111 depends on CPU_V7 && SMP
62e4d357 1112 depends on !ARCH_MULTIPLATFORM
a672e99b
WD
1113 help
1114 This option enables the workaround for the 742231 Cortex-A9
1115 (r2p0..r2p2) erratum. Under certain conditions, specific to the
1116 Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1117 accessing some data located in the same cache line, may get corrupted
1118 data due to bad handling of the address hazard when the line gets
1119 replaced from one of the CPUs at the same time as another CPU is
1120 accessing it. This workaround sets specific bits in the diagnostic
1121 register of the Cortex-A9 which reduces the linefill issuing
1122 capabilities of the processor.
1123
69155794
JM
1124config ARM_ERRATA_643719
1125 bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1126 depends on CPU_V7 && SMP
1127 help
1128 This option enables the workaround for the 643719 Cortex-A9 (prior to
1129 r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1130 register returns zero when it should return one. The workaround
1131 corrects this value, ensuring cache maintenance operations which use
1132 it behave as intended and avoiding data corruption.
1133
cdf357f1
WD
1134config ARM_ERRATA_720789
1135 bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
e66dc745 1136 depends on CPU_V7
cdf357f1
WD
1137 help
1138 This option enables the workaround for the 720789 Cortex-A9 (prior to
1139 r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1140 broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1141 As a consequence of this erratum, some TLB entries which should be
1142 invalidated are not, resulting in an incoherency in the system page
1143 tables. The workaround changes the TLB flushing routines to invalidate
1144 entries regardless of the ASID.
475d92fc
WD
1145
1146config ARM_ERRATA_743622
1147 bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1148 depends on CPU_V7
62e4d357 1149 depends on !ARCH_MULTIPLATFORM
475d92fc
WD
1150 help
1151 This option enables the workaround for the 743622 Cortex-A9
efbc74ac 1152 (r2p*) erratum. Under very rare conditions, a faulty
475d92fc
WD
1153 optimisation in the Cortex-A9 Store Buffer may lead to data
1154 corruption. This workaround sets a specific bit in the diagnostic
1155 register of the Cortex-A9 which disables the Store Buffer
1156 optimisation, preventing the defect from occurring. This has no
1157 visible impact on the overall performance or power consumption of the
1158 processor.
1159
9a27c27c
WD
1160config ARM_ERRATA_751472
1161 bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
ba90c516 1162 depends on CPU_V7
62e4d357 1163 depends on !ARCH_MULTIPLATFORM
9a27c27c
WD
1164 help
1165 This option enables the workaround for the 751472 Cortex-A9 (prior
1166 to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1167 completion of a following broadcasted operation if the second
1168 operation is received by a CPU before the ICIALLUIS has completed,
1169 potentially leading to corrupted entries in the cache or TLB.
1170
fcbdc5fe
WD
1171config ARM_ERRATA_754322
1172 bool "ARM errata: possible faulty MMU translations following an ASID switch"
1173 depends on CPU_V7
1174 help
1175 This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1176 r3p*) erratum. A speculative memory access may cause a page table walk
1177 which starts prior to an ASID switch but completes afterwards. This
1178 can populate the micro-TLB with a stale entry which may be hit with
1179 the new ASID. This workaround places two dsb instructions in the mm
1180 switching code so that no page table walks can cross the ASID switch.
1181
5dab26af
WD
1182config ARM_ERRATA_754327
1183 bool "ARM errata: no automatic Store Buffer drain"
1184 depends on CPU_V7 && SMP
1185 help
1186 This option enables the workaround for the 754327 Cortex-A9 (prior to
1187 r2p0) erratum. The Store Buffer does not have any automatic draining
1188 mechanism and therefore a livelock may occur if an external agent
1189 continuously polls a memory location waiting to observe an update.
1190 This workaround defines cpu_relax() as smp_mb(), preventing correctly
1191 written polling loops from denying visibility of updates to memory.
1192
145e10e1
CM
1193config ARM_ERRATA_364296
1194 bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
fd832478 1195 depends on CPU_V6
145e10e1
CM
1196 help
1197 This options enables the workaround for the 364296 ARM1136
1198 r0p2 erratum (possible cache data corruption with
1199 hit-under-miss enabled). It sets the undocumented bit 31 in
1200 the auxiliary control register and the FI bit in the control
1201 register, thus disabling hit-under-miss without putting the
1202 processor into full low interrupt latency mode. ARM11MPCore
1203 is not affected.
1204
f630c1bd
WD
1205config ARM_ERRATA_764369
1206 bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1207 depends on CPU_V7 && SMP
1208 help
1209 This option enables the workaround for erratum 764369
1210 affecting Cortex-A9 MPCore with two or more processors (all
1211 current revisions). Under certain timing circumstances, a data
1212 cache line maintenance operation by MVA targeting an Inner
1213 Shareable memory region may fail to proceed up to either the
1214 Point of Coherency or to the Point of Unification of the
1215 system. This workaround adds a DSB instruction before the
1216 relevant cache maintenance functions and sets a specific bit
1217 in the diagnostic control register of the SCU.
1218
7253b85c
SH
1219config ARM_ERRATA_775420
1220 bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1221 depends on CPU_V7
1222 help
1223 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1224 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1225 operation aborts with MMU exception, it might cause the processor
1226 to deadlock. This workaround puts DSB before executing ISB if
1227 an abort may occur on cache maintenance.
1228
93dc6887
CM
1229config ARM_ERRATA_798181
1230 bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1231 depends on CPU_V7 && SMP
1232 help
1233 On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1234 adequately shooting down all use of the old entries. This
1235 option enables the Linux kernel workaround for this erratum
1236 which sends an IPI to the CPUs that are running the same ASID
1237 as the one being invalidated.
1238
84b6504f
WD
1239config ARM_ERRATA_773022
1240 bool "ARM errata: incorrect instructions may be executed from loop buffer"
1241 depends on CPU_V7
1242 help
1243 This option enables the workaround for the 773022 Cortex-A15
1244 (up to r0p4) erratum. In certain rare sequences of code, the
1245 loop buffer may deliver incorrect instructions. This
1246 workaround disables the loop buffer to avoid the erratum.
1247
1da177e4
LT
1248endmenu
1249
1250source "arch/arm/common/Kconfig"
1251
1da177e4
LT
1252menu "Bus support"
1253
1254config ARM_AMBA
1255 bool
1256
1257config ISA
1258 bool
1da177e4
LT
1259 help
1260 Find out whether you have ISA slots on your motherboard. ISA is the
1261 name of a bus system, i.e. the way the CPU talks to the other stuff
1262 inside your box. Other bus systems are PCI, EISA, MicroChannel
1263 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
1264 newer boards don't support it. If you have ISA, say Y, otherwise N.
1265
065909b9 1266# Select ISA DMA controller support
1da177e4
LT
1267config ISA_DMA
1268 bool
065909b9 1269 select ISA_DMA_API
1da177e4 1270
065909b9 1271# Select ISA DMA interface
5cae841b
AV
1272config ISA_DMA_API
1273 bool
5cae841b 1274
1da177e4 1275config PCI
0b05da72 1276 bool "PCI support" if MIGHT_HAVE_PCI
1da177e4
LT
1277 help
1278 Find out whether you have a PCI motherboard. PCI is the name of a
1279 bus system, i.e. the way the CPU talks to the other stuff inside
1280 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1281 VESA. If you have PCI, say Y, otherwise N.
1282
52882173
AV
1283config PCI_DOMAINS
1284 bool
1285 depends on PCI
1286
b080ac8a
MRJ
1287config PCI_NANOENGINE
1288 bool "BSE nanoEngine PCI support"
1289 depends on SA1100_NANOENGINE
1290 help
1291 Enable PCI on the BSE nanoEngine board.
1292
36e23590
MW
1293config PCI_SYSCALL
1294 def_bool PCI
1295
a0113a99
MR
1296config PCI_HOST_ITE8152
1297 bool
1298 depends on PCI && MACH_ARMCORE
1299 default y
1300 select DMABOUNCE
1301
1da177e4 1302source "drivers/pci/Kconfig"
3f06d157 1303source "drivers/pci/pcie/Kconfig"
1da177e4
LT
1304
1305source "drivers/pcmcia/Kconfig"
1306
1307endmenu
1308
1309menu "Kernel Features"
1310
3b55658a
DM
1311config HAVE_SMP
1312 bool
1313 help
1314 This option should be selected by machines which have an SMP-
1315 capable CPU.
1316
1317 The only effect of this option is to make the SMP-related
1318 options available to the user for configuration.
1319
1da177e4 1320config SMP
bb2d8130 1321 bool "Symmetric Multi-Processing"
fbb4ddac 1322 depends on CPU_V6K || CPU_V7
bc28248e 1323 depends on GENERIC_CLOCKEVENTS
3b55658a 1324 depends on HAVE_SMP
801bb21c 1325 depends on MMU || ARM_MPU
1da177e4
LT
1326 help
1327 This enables support for systems with more than one CPU. If you have
4a474157
RG
1328 a system with only one CPU, say N. If you have a system with more
1329 than one CPU, say Y.
1da177e4 1330
4a474157 1331 If you say N here, the kernel will run on uni- and multiprocessor
1da177e4 1332 machines, but will use only one CPU of a multiprocessor machine. If
4a474157
RG
1333 you say Y here, the kernel will run on many, but not all,
1334 uniprocessor machines. On a uniprocessor machine, the kernel
1335 will run faster if you say N here.
1da177e4 1336
395cf969 1337 See also <file:Documentation/x86/i386/IO-APIC.txt>,
1da177e4 1338 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
50a23e6e 1339 <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1da177e4
LT
1340
1341 If you don't know what to do here, say N.
1342
f00ec48f
RK
1343config SMP_ON_UP
1344 bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
801bb21c 1345 depends on SMP && !XIP_KERNEL && MMU
f00ec48f
RK
1346 default y
1347 help
1348 SMP kernels contain instructions which fail on non-SMP processors.
1349 Enabling this option allows the kernel to modify itself to make
1350 these instructions safe. Disabling it allows about 1K of space
1351 savings.
1352
1353 If you don't know what to do here, say Y.
1354
c9018aab
VG
1355config ARM_CPU_TOPOLOGY
1356 bool "Support cpu topology definition"
1357 depends on SMP && CPU_V7
1358 default y
1359 help
1360 Support ARM cpu topology definition. The MPIDR register defines
1361 affinity between processors which is then used to describe the cpu
1362 topology of an ARM System.
1363
1364config SCHED_MC
1365 bool "Multi-core scheduler support"
1366 depends on ARM_CPU_TOPOLOGY
1367 help
1368 Multi-core scheduler support improves the CPU scheduler's decision
1369 making when dealing with multi-core CPU chips at a cost of slightly
1370 increased overhead in some places. If unsure say N here.
1371
1372config SCHED_SMT
1373 bool "SMT scheduler support"
1374 depends on ARM_CPU_TOPOLOGY
1375 help
1376 Improves the CPU scheduler's decision making when dealing with
1377 MultiThreading at a cost of slightly increased overhead in some
1378 places. If unsure say N here.
1379
a8cbcd92
RK
1380config HAVE_ARM_SCU
1381 bool
a8cbcd92
RK
1382 help
1383 This option enables support for the ARM system coherency unit
1384
8a4da6e3 1385config HAVE_ARM_ARCH_TIMER
022c03a2
MZ
1386 bool "Architected timer support"
1387 depends on CPU_V7
8a4da6e3 1388 select ARM_ARCH_TIMER
0c403462 1389 select GENERIC_CLOCKEVENTS
022c03a2
MZ
1390 help
1391 This option enables support for the ARM architected timer
1392
f32f4ce2
RK
1393config HAVE_ARM_TWD
1394 bool
1395 depends on SMP
da4a686a 1396 select CLKSRC_OF if OF
f32f4ce2
RK
1397 help
1398 This options enables support for the ARM timer and watchdog unit
1399
e8db288e
NP
1400config MCPM
1401 bool "Multi-Cluster Power Management"
1402 depends on CPU_V7 && SMP
1403 help
1404 This option provides the common power management infrastructure
1405 for (multi-)cluster based systems, such as big.LITTLE based
1406 systems.
1407
1c33be57
NP
1408config BIG_LITTLE
1409 bool "big.LITTLE support (Experimental)"
1410 depends on CPU_V7 && SMP
1411 select MCPM
1412 help
1413 This option enables support selections for the big.LITTLE
1414 system architecture.
1415
1416config BL_SWITCHER
1417 bool "big.LITTLE switcher support"
1418 depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
1c33be57 1419 select ARM_CPU_SUSPEND
51aaf81f 1420 select CPU_PM
1c33be57
NP
1421 help
1422 The big.LITTLE "switcher" provides the core functionality to
1423 transparently handle transition between a cluster of A15's
1424 and a cluster of A7's in a big.LITTLE system.
1425
b22537c6
NP
1426config BL_SWITCHER_DUMMY_IF
1427 tristate "Simple big.LITTLE switcher user interface"
1428 depends on BL_SWITCHER && DEBUG_KERNEL
1429 help
1430 This is a simple and dummy char dev interface to control
1431 the big.LITTLE switcher core code. It is meant for
1432 debugging purposes only.
1433
8d5796d2
LB
1434choice
1435 prompt "Memory split"
006fa259 1436 depends on MMU
8d5796d2
LB
1437 default VMSPLIT_3G
1438 help
1439 Select the desired split between kernel and user memory.
1440
1441 If you are not absolutely sure what you are doing, leave this
1442 option alone!
1443
1444 config VMSPLIT_3G
1445 bool "3G/1G user/kernel split"
1446 config VMSPLIT_2G
1447 bool "2G/2G user/kernel split"
1448 config VMSPLIT_1G
1449 bool "1G/3G user/kernel split"
1450endchoice
1451
1452config PAGE_OFFSET
1453 hex
006fa259 1454 default PHYS_OFFSET if !MMU
8d5796d2
LB
1455 default 0x40000000 if VMSPLIT_1G
1456 default 0x80000000 if VMSPLIT_2G
1457 default 0xC0000000
1458
1da177e4
LT
1459config NR_CPUS
1460 int "Maximum number of CPUs (2-32)"
1461 range 2 32
1462 depends on SMP
1463 default "4"
1464
a054a811 1465config HOTPLUG_CPU
00b7dede 1466 bool "Support for hot-pluggable CPUs"
40b31360 1467 depends on SMP
a054a811
RK
1468 help
1469 Say Y here to experiment with turning CPUs off and on. CPUs
1470 can be controlled through /sys/devices/system/cpu.
1471
2bdd424f
WD
1472config ARM_PSCI
1473 bool "Support for the ARM Power State Coordination Interface (PSCI)"
1474 depends on CPU_V7
1475 help
1476 Say Y here if you want Linux to communicate with system firmware
1477 implementing the PSCI specification for CPU-centric power
1478 management operations described in ARM document number ARM DEN
1479 0022A ("Power State Coordination Interface System Software on
1480 ARM processors").
1481
2a6ad871
MR
1482# The GPIO number here must be sorted by descending number. In case of
1483# a multiplatform kernel, we just want the highest value required by the
1484# selected platforms.
44986ab0
PDSN
1485config ARCH_NR_GPIO
1486 int
3dea19e8 1487 default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
aa42587a
TF
1488 default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1489 SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
eb171a99 1490 default 416 if ARCH_SUNXI
06b851e5 1491 default 392 if ARCH_U8500
01bb914c 1492 default 352 if ARCH_VT8500
7b5da4c3 1493 default 288 if ARCH_ROCKCHIP
2a6ad871 1494 default 264 if MACH_H4700
44986ab0
PDSN
1495 default 0
1496 help
1497 Maximum number of GPIOs in the system.
1498
1499 If unsure, leave the default value.
1500
d45a398f 1501source kernel/Kconfig.preempt
1da177e4 1502
c9218b16 1503config HZ_FIXED
f8065813 1504 int
070b8b43 1505 default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
a73ddc61 1506 ARCH_S5PV210 || ARCH_EXYNOS4
5248c657 1507 default AT91_TIMER_HZ if ARCH_AT91
bf98c1ea 1508 default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY
47d84682 1509 default 0
c9218b16
RK
1510
1511choice
47d84682 1512 depends on HZ_FIXED = 0
c9218b16
RK
1513 prompt "Timer frequency"
1514
1515config HZ_100
1516 bool "100 Hz"
1517
1518config HZ_200
1519 bool "200 Hz"
1520
1521config HZ_250
1522 bool "250 Hz"
1523
1524config HZ_300
1525 bool "300 Hz"
1526
1527config HZ_500
1528 bool "500 Hz"
1529
1530config HZ_1000
1531 bool "1000 Hz"
1532
1533endchoice
1534
1535config HZ
1536 int
47d84682 1537 default HZ_FIXED if HZ_FIXED != 0
c9218b16
RK
1538 default 100 if HZ_100
1539 default 200 if HZ_200
1540 default 250 if HZ_250
1541 default 300 if HZ_300
1542 default 500 if HZ_500
1543 default 1000
1544
1545config SCHED_HRTICK
1546 def_bool HIGH_RES_TIMERS
f8065813 1547
16c79651 1548config THUMB2_KERNEL
bc7dea00 1549 bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
4477ca45 1550 depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
bc7dea00 1551 default y if CPU_THUMBONLY
16c79651
CM
1552 select AEABI
1553 select ARM_ASM_UNIFIED
89bace65 1554 select ARM_UNWIND
16c79651
CM
1555 help
1556 By enabling this option, the kernel will be compiled in
1557 Thumb-2 mode. A compiler/assembler that understand the unified
1558 ARM-Thumb syntax is needed.
1559
1560 If unsure, say N.
1561
6f685c5c
DM
1562config THUMB2_AVOID_R_ARM_THM_JUMP11
1563 bool "Work around buggy Thumb-2 short branch relocations in gas"
1564 depends on THUMB2_KERNEL && MODULES
1565 default y
1566 help
1567 Various binutils versions can resolve Thumb-2 branches to
1568 locally-defined, preemptible global symbols as short-range "b.n"
1569 branch instructions.
1570
1571 This is a problem, because there's no guarantee the final
1572 destination of the symbol, or any candidate locations for a
1573 trampoline, are within range of the branch. For this reason, the
1574 kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1575 relocation in modules at all, and it makes little sense to add
1576 support.
1577
1578 The symptom is that the kernel fails with an "unsupported
1579 relocation" error when loading some modules.
1580
1581 Until fixed tools are available, passing
1582 -fno-optimize-sibling-calls to gcc should prevent gcc generating
1583 code which hits this problem, at the cost of a bit of extra runtime
1584 stack usage in some cases.
1585
1586 The problem is described in more detail at:
1587 https://bugs.launchpad.net/binutils-linaro/+bug/725126
1588
1589 Only Thumb-2 kernels are affected.
1590
1591 Unless you are sure your tools don't have this problem, say Y.
1592
0becb088
CM
1593config ARM_ASM_UNIFIED
1594 bool
1595
704bdda0
NP
1596config AEABI
1597 bool "Use the ARM EABI to compile the kernel"
1598 help
1599 This option allows for the kernel to be compiled using the latest
1600 ARM ABI (aka EABI). This is only useful if you are using a user
1601 space environment that is also compiled with EABI.
1602
1603 Since there are major incompatibilities between the legacy ABI and
1604 EABI, especially with regard to structure member alignment, this
1605 option also changes the kernel syscall calling convention to
1606 disambiguate both ABIs and allow for backward compatibility support
1607 (selected with CONFIG_OABI_COMPAT).
1608
1609 To use this you need GCC version 4.0.0 or later.
1610
6c90c872 1611config OABI_COMPAT
a73a3ff1 1612 bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
d6f94fa0 1613 depends on AEABI && !THUMB2_KERNEL
6c90c872
NP
1614 help
1615 This option preserves the old syscall interface along with the
1616 new (ARM EABI) one. It also provides a compatibility layer to
1617 intercept syscalls that have structure arguments which layout
1618 in memory differs between the legacy ABI and the new ARM EABI
1619 (only for non "thumb" binaries). This option adds a tiny
1620 overhead to all syscalls and produces a slightly larger kernel.
91702175
KC
1621
1622 The seccomp filter system will not be available when this is
1623 selected, since there is no way yet to sensibly distinguish
1624 between calling conventions during filtering.
1625
6c90c872
NP
1626 If you know you'll be using only pure EABI user space then you
1627 can say N here. If this option is not selected and you attempt
1628 to execute a legacy ABI binary then the result will be
1629 UNPREDICTABLE (in fact it can be predicted that it won't work
b02f8467 1630 at all). If in doubt say N.
6c90c872 1631
eb33575c 1632config ARCH_HAS_HOLES_MEMORYMODEL
e80d6a24 1633 bool
e80d6a24 1634
05944d74
RK
1635config ARCH_SPARSEMEM_ENABLE
1636 bool
1637
07a2f737
RK
1638config ARCH_SPARSEMEM_DEFAULT
1639 def_bool ARCH_SPARSEMEM_ENABLE
1640
05944d74 1641config ARCH_SELECT_MEMORY_MODEL
be370302 1642 def_bool ARCH_SPARSEMEM_ENABLE
c80d79d7 1643
7b7bf499
WD
1644config HAVE_ARCH_PFN_VALID
1645 def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1646
053a96ca 1647config HIGHMEM
e8db89a2
RK
1648 bool "High Memory Support"
1649 depends on MMU
053a96ca
NP
1650 help
1651 The address space of ARM processors is only 4 Gigabytes large
1652 and it has to accommodate user address space, kernel address
1653 space as well as some memory mapped IO. That means that, if you
1654 have a large amount of physical memory and/or IO, not all of the
1655 memory can be "permanently mapped" by the kernel. The physical
1656 memory that is not permanently mapped is called "high memory".
1657
1658 Depending on the selected kernel/user memory split, minimum
1659 vmalloc space and actual amount of RAM, you may not need this
1660 option which should result in a slightly faster kernel.
1661
1662 If unsure, say n.
1663
65cec8e3
RK
1664config HIGHPTE
1665 bool "Allocate 2nd-level pagetables from highmem"
1666 depends on HIGHMEM
65cec8e3 1667
1b8873a0
JI
1668config HW_PERF_EVENTS
1669 bool "Enable hardware performance counter support for perf events"
f0d1bc47 1670 depends on PERF_EVENTS
1b8873a0
JI
1671 default y
1672 help
1673 Enable hardware performance counter support for perf events. If
1674 disabled, perf events will use software events only.
1675
1355e2a6
CM
1676config SYS_SUPPORTS_HUGETLBFS
1677 def_bool y
1678 depends on ARM_LPAE
1679
8d962507
CM
1680config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1681 def_bool y
1682 depends on ARM_LPAE
1683
4bfab203
SC
1684config ARCH_WANT_GENERAL_HUGETLB
1685 def_bool y
1686
3f22ab27
DH
1687source "mm/Kconfig"
1688
c1b2d970 1689config FORCE_MAX_ZONEORDER
bf98c1ea
LP
1690 int "Maximum zone order" if ARCH_SHMOBILE_LEGACY
1691 range 11 64 if ARCH_SHMOBILE_LEGACY
898f08e1 1692 default "12" if SOC_AM33XX
6d85e2b0 1693 default "9" if SA1111 || ARCH_EFM32
c1b2d970
MD
1694 default "11"
1695 help
1696 The kernel memory allocator divides physically contiguous memory
1697 blocks into "zones", where each zone is a power of two number of
1698 pages. This option selects the largest power of two that the kernel
1699 keeps in the memory allocator. If you need to allocate very large
1700 blocks of physically contiguous memory, then you may need to
1701 increase this value.
1702
1703 This config option is actually maximum order plus one. For example,
1704 a value of 11 means that the largest free memory block is 2^10 pages.
1705
1da177e4
LT
1706config ALIGNMENT_TRAP
1707 bool
f12d0d7c 1708 depends on CPU_CP15_MMU
1da177e4 1709 default y if !ARCH_EBSA110
e119bfff 1710 select HAVE_PROC_CPU if PROC_FS
1da177e4 1711 help
84eb8d06 1712 ARM processors cannot fetch/store information which is not
1da177e4
LT
1713 naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1714 address divisible by 4. On 32-bit ARM processors, these non-aligned
1715 fetch/store instructions will be emulated in software if you say
1716 here, which has a severe performance impact. This is necessary for
1717 correct operation of some network protocols. With an IP-only
1718 configuration it is safe to say N, otherwise say Y.
1719
39ec58f3 1720config UACCESS_WITH_MEMCPY
38ef2ad5
LW
1721 bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1722 depends on MMU
39ec58f3
LB
1723 default y if CPU_FEROCEON
1724 help
1725 Implement faster copy_to_user and clear_user methods for CPU
1726 cores where a 8-word STM instruction give significantly higher
1727 memory write throughput than a sequence of individual 32bit stores.
1728
1729 A possible side effect is a slight increase in scheduling latency
1730 between threads sharing the same address space if they invoke
1731 such copy operations with large buffers.
1732
1733 However, if the CPU data cache is using a write-allocate mode,
1734 this option is unlikely to provide any performance gain.
1735
70c70d97
NP
1736config SECCOMP
1737 bool
1738 prompt "Enable seccomp to safely compute untrusted bytecode"
1739 ---help---
1740 This kernel feature is useful for number crunching applications
1741 that may need to compute untrusted bytecode during their
1742 execution. By using pipes or other transports made available to
1743 the process as file descriptors supporting the read/write
1744 syscalls, it's possible to isolate those applications in
1745 their own address space using seccomp. Once seccomp is
1746 enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1747 and the task is only allowed to execute a few safe syscalls
1748 defined by each seccomp mode.
1749
06e6295b
SS
1750config SWIOTLB
1751 def_bool y
1752
1753config IOMMU_HELPER
1754 def_bool SWIOTLB
1755
eff8d644
SS
1756config XEN_DOM0
1757 def_bool y
1758 depends on XEN
1759
1760config XEN
1761 bool "Xen guest support on ARM (EXPERIMENTAL)"
85323a99 1762 depends on ARM && AEABI && OF
f880b67d 1763 depends on CPU_V7 && !CPU_V6
85323a99 1764 depends on !GENERIC_ATOMIC64
7693decc 1765 depends on MMU
51aaf81f 1766 select ARCH_DMA_ADDR_T_64BIT
17b7ab80 1767 select ARM_PSCI
83862ccf 1768 select SWIOTLB_XEN
eff8d644
SS
1769 help
1770 Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1771
1da177e4
LT
1772endmenu
1773
1774menu "Boot options"
1775
9eb8f674
GL
1776config USE_OF
1777 bool "Flattened Device Tree support"
b1b3f49c 1778 select IRQ_DOMAIN
9eb8f674
GL
1779 select OF
1780 select OF_EARLY_FLATTREE
bcedb5f9 1781 select OF_RESERVED_MEM
9eb8f674
GL
1782 help
1783 Include support for flattened device tree machine descriptions.
1784
bd51e2f5
NP
1785config ATAGS
1786 bool "Support for the traditional ATAGS boot data passing" if USE_OF
1787 default y
1788 help
1789 This is the traditional way of passing data to the kernel at boot
1790 time. If you are solely relying on the flattened device tree (or
1791 the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1792 to remove ATAGS support from your kernel binary. If unsure,
1793 leave this to y.
1794
1795config DEPRECATED_PARAM_STRUCT
1796 bool "Provide old way to pass kernel parameters"
1797 depends on ATAGS
1798 help
1799 This was deprecated in 2001 and announced to live on for 5 years.
1800 Some old boot loaders still use this way.
1801
1da177e4
LT
1802# Compressed boot loader in ROM. Yes, we really want to ask about
1803# TEXT and BSS so we preserve their values in the config files.
1804config ZBOOT_ROM_TEXT
1805 hex "Compressed ROM boot loader base address"
1806 default "0"
1807 help
1808 The physical address at which the ROM-able zImage is to be
1809 placed in the target. Platforms which normally make use of
1810 ROM-able zImage formats normally set this to a suitable
1811 value in their defconfig file.
1812
1813 If ZBOOT_ROM is not enabled, this has no effect.
1814
1815config ZBOOT_ROM_BSS
1816 hex "Compressed ROM boot loader BSS address"
1817 default "0"
1818 help
f8c440b2
DF
1819 The base address of an area of read/write memory in the target
1820 for the ROM-able zImage which must be available while the
1821 decompressor is running. It must be large enough to hold the
1822 entire decompressed kernel plus an additional 128 KiB.
1823 Platforms which normally make use of ROM-able zImage formats
1824 normally set this to a suitable value in their defconfig file.
1da177e4
LT
1825
1826 If ZBOOT_ROM is not enabled, this has no effect.
1827
1828config ZBOOT_ROM
1829 bool "Compressed boot loader in ROM/flash"
1830 depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
10968131 1831 depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
1da177e4
LT
1832 help
1833 Say Y here if you intend to execute your compressed kernel image
1834 (zImage) directly from ROM or flash. If unsure, say N.
1835
090ab3ff
SH
1836choice
1837 prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
d6f94fa0 1838 depends on ZBOOT_ROM && ARCH_SH7372
090ab3ff
SH
1839 default ZBOOT_ROM_NONE
1840 help
1841 Include experimental SD/MMC loading code in the ROM-able zImage.
59bf8964 1842 With this enabled it is possible to write the ROM-able zImage
090ab3ff
SH
1843 kernel image to an MMC or SD card and boot the kernel straight
1844 from the reset vector. At reset the processor Mask ROM will load
59bf8964 1845 the first part of the ROM-able zImage which in turn loads the
090ab3ff
SH
1846 rest the kernel image to RAM.
1847
1848config ZBOOT_ROM_NONE
1849 bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1850 help
1851 Do not load image from SD or MMC
1852
f45b1149
SH
1853config ZBOOT_ROM_MMCIF
1854 bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
f45b1149 1855 help
090ab3ff
SH
1856 Load image from MMCIF hardware block.
1857
1858config ZBOOT_ROM_SH_MOBILE_SDHI
1859 bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1860 help
1861 Load image from SDHI hardware block
1862
1863endchoice
f45b1149 1864
e2a6a3aa
JB
1865config ARM_APPENDED_DTB
1866 bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
10968131 1867 depends on OF
e2a6a3aa
JB
1868 help
1869 With this option, the boot code will look for a device tree binary
1870 (DTB) appended to zImage
1871 (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1872
1873 This is meant as a backward compatibility convenience for those
1874 systems with a bootloader that can't be upgraded to accommodate
1875 the documented boot protocol using a device tree.
1876
1877 Beware that there is very little in terms of protection against
1878 this option being confused by leftover garbage in memory that might
1879 look like a DTB header after a reboot if no actual DTB is appended
1880 to zImage. Do not leave this option active in a production kernel
1881 if you don't intend to always append a DTB. Proper passing of the
1882 location into r2 of a bootloader provided DTB is always preferable
1883 to this option.
1884
b90b9a38
NP
1885config ARM_ATAG_DTB_COMPAT
1886 bool "Supplement the appended DTB with traditional ATAG information"
1887 depends on ARM_APPENDED_DTB
1888 help
1889 Some old bootloaders can't be updated to a DTB capable one, yet
1890 they provide ATAGs with memory configuration, the ramdisk address,
1891 the kernel cmdline string, etc. Such information is dynamically
1892 provided by the bootloader and can't always be stored in a static
1893 DTB. To allow a device tree enabled kernel to be used with such
1894 bootloaders, this option allows zImage to extract the information
1895 from the ATAG list and store it at run time into the appended DTB.
1896
d0f34a11
GR
1897choice
1898 prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1899 default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1900
1901config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1902 bool "Use bootloader kernel arguments if available"
1903 help
1904 Uses the command-line options passed by the boot loader instead of
1905 the device tree bootargs property. If the boot loader doesn't provide
1906 any, the device tree bootargs property will be used.
1907
1908config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1909 bool "Extend with bootloader kernel arguments"
1910 help
1911 The command-line arguments provided by the boot loader will be
1912 appended to the the device tree bootargs property.
1913
1914endchoice
1915
1da177e4
LT
1916config CMDLINE
1917 string "Default kernel command string"
1918 default ""
1919 help
1920 On some architectures (EBSA110 and CATS), there is currently no way
1921 for the boot loader to pass arguments to the kernel. For these
1922 architectures, you should supply some command-line options at build
1923 time by entering them here. As a minimum, you should specify the
1924 memory size and the root device (e.g., mem=64M root=/dev/nfs).
1925
4394c124
VB
1926choice
1927 prompt "Kernel command line type" if CMDLINE != ""
1928 default CMDLINE_FROM_BOOTLOADER
bd51e2f5 1929 depends on ATAGS
4394c124
VB
1930
1931config CMDLINE_FROM_BOOTLOADER
1932 bool "Use bootloader kernel arguments if available"
1933 help
1934 Uses the command-line options passed by the boot loader. If
1935 the boot loader doesn't provide any, the default kernel command
1936 string provided in CMDLINE will be used.
1937
1938config CMDLINE_EXTEND
1939 bool "Extend bootloader kernel arguments"
1940 help
1941 The command-line arguments provided by the boot loader will be
1942 appended to the default kernel command string.
1943
92d2040d
AH
1944config CMDLINE_FORCE
1945 bool "Always use the default kernel command string"
92d2040d
AH
1946 help
1947 Always use the default kernel command string, even if the boot
1948 loader passes other arguments to the kernel.
1949 This is useful if you cannot or don't want to change the
1950 command-line options your boot loader passes to the kernel.
4394c124 1951endchoice
92d2040d 1952
1da177e4
LT
1953config XIP_KERNEL
1954 bool "Kernel Execute-In-Place from ROM"
10968131 1955 depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
1da177e4
LT
1956 help
1957 Execute-In-Place allows the kernel to run from non-volatile storage
1958 directly addressable by the CPU, such as NOR flash. This saves RAM
1959 space since the text section of the kernel is not loaded from flash
1960 to RAM. Read-write sections, such as the data section and stack,
1961 are still copied to RAM. The XIP kernel is not compressed since
1962 it has to run directly from flash, so it will take more space to
1963 store it. The flash address used to link the kernel object files,
1964 and for storing it, is configuration dependent. Therefore, if you
1965 say Y here, you must know the proper physical address where to
1966 store the kernel image depending on your own flash memory usage.
1967
1968 Also note that the make target becomes "make xipImage" rather than
1969 "make zImage" or "make Image". The final kernel binary to put in
1970 ROM memory will be arch/arm/boot/xipImage.
1971
1972 If unsure, say N.
1973
1974config XIP_PHYS_ADDR
1975 hex "XIP Kernel Physical Location"
1976 depends on XIP_KERNEL
1977 default "0x00080000"
1978 help
1979 This is the physical address in your flash memory the kernel will
1980 be linked for and stored to. This address is dependent on your
1981 own flash usage.
1982
c587e4a6
RP
1983config KEXEC
1984 bool "Kexec system call (EXPERIMENTAL)"
19ab428f 1985 depends on (!SMP || PM_SLEEP_SMP)
c587e4a6
RP
1986 help
1987 kexec is a system call that implements the ability to shutdown your
1988 current kernel, and to start another kernel. It is like a reboot
01dd2fbf 1989 but it is independent of the system firmware. And like a reboot
c587e4a6
RP
1990 you can start any kernel with it, not just Linux.
1991
1992 It is an ongoing process to be certain the hardware in a machine
1993 is properly shutdown, so do not be surprised if this code does not
bf220695 1994 initially work for you.
c587e4a6 1995
4cd9d6f7
RP
1996config ATAGS_PROC
1997 bool "Export atags in procfs"
bd51e2f5 1998 depends on ATAGS && KEXEC
b98d7291 1999 default y
4cd9d6f7
RP
2000 help
2001 Should the atags used to boot the kernel be exported in an "atags"
2002 file in procfs. Useful with kexec.
2003
cb5d39b3
MW
2004config CRASH_DUMP
2005 bool "Build kdump crash kernel (EXPERIMENTAL)"
cb5d39b3
MW
2006 help
2007 Generate crash dump after being started by kexec. This should
2008 be normally only set in special crash dump kernels which are
2009 loaded in the main kernel with kexec-tools into a specially
2010 reserved region and then later executed after a crash by
2011 kdump/kexec. The crash dump kernel must be compiled to a
2012 memory address not used by the main kernel
2013
2014 For more details see Documentation/kdump/kdump.txt
2015
e69edc79
EM
2016config AUTO_ZRELADDR
2017 bool "Auto calculation of the decompressed kernel image address"
e69edc79
EM
2018 help
2019 ZRELADDR is the physical address where the decompressed kernel
2020 image will be placed. If AUTO_ZRELADDR is selected, the address
2021 will be determined at run-time by masking the current IP with
2022 0xf8000000. This assumes the zImage being placed in the first 128MB
2023 from start of memory.
2024
1da177e4
LT
2025endmenu
2026
ac9d7efc 2027menu "CPU Power Management"
1da177e4 2028
1da177e4 2029source "drivers/cpufreq/Kconfig"
1da177e4 2030
ac9d7efc
RK
2031source "drivers/cpuidle/Kconfig"
2032
2033endmenu
2034
1da177e4
LT
2035menu "Floating point emulation"
2036
2037comment "At least one emulation must be selected"
2038
2039config FPE_NWFPE
2040 bool "NWFPE math emulation"
593c252a 2041 depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
1da177e4
LT
2042 ---help---
2043 Say Y to include the NWFPE floating point emulator in the kernel.
2044 This is necessary to run most binaries. Linux does not currently
2045 support floating point hardware so you need to say Y here even if
2046 your machine has an FPA or floating point co-processor podule.
2047
2048 You may say N here if you are going to load the Acorn FPEmulator
2049 early in the bootup.
2050
2051config FPE_NWFPE_XP
2052 bool "Support extended precision"
bedf142b 2053 depends on FPE_NWFPE
1da177e4
LT
2054 help
2055 Say Y to include 80-bit support in the kernel floating-point
2056 emulator. Otherwise, only 32 and 64-bit support is compiled in.
2057 Note that gcc does not generate 80-bit operations by default,
2058 so in most cases this option only enlarges the size of the
2059 floating point emulator without any good reason.
2060
2061 You almost surely want to say N here.
2062
2063config FPE_FASTFPE
2064 bool "FastFPE math emulation (EXPERIMENTAL)"
d6f94fa0 2065 depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
1da177e4
LT
2066 ---help---
2067 Say Y here to include the FAST floating point emulator in the kernel.
2068 This is an experimental much faster emulator which now also has full
2069 precision for the mantissa. It does not support any exceptions.
2070 It is very simple, and approximately 3-6 times faster than NWFPE.
2071
2072 It should be sufficient for most programs. It may be not suitable
2073 for scientific calculations, but you have to check this for yourself.
2074 If you do not feel you need a faster FP emulation you should better
2075 choose NWFPE.
2076
2077config VFP
2078 bool "VFP-format floating point maths"
e399b1a4 2079 depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
1da177e4
LT
2080 help
2081 Say Y to include VFP support code in the kernel. This is needed
2082 if your hardware includes a VFP unit.
2083
2084 Please see <file:Documentation/arm/VFP/release-notes.txt> for
2085 release notes and additional status information.
2086
2087 Say N if your target does not have VFP hardware.
2088
25ebee02
CM
2089config VFPv3
2090 bool
2091 depends on VFP
2092 default y if CPU_V7
2093
b5872db4
CM
2094config NEON
2095 bool "Advanced SIMD (NEON) Extension support"
2096 depends on VFPv3 && CPU_V7
2097 help
2098 Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2099 Extension.
2100
73c132c1
AB
2101config KERNEL_MODE_NEON
2102 bool "Support for NEON in kernel mode"
c4a30c3b 2103 depends on NEON && AEABI
73c132c1
AB
2104 help
2105 Say Y to include support for NEON in kernel mode.
2106
1da177e4
LT
2107endmenu
2108
2109menu "Userspace binary formats"
2110
2111source "fs/Kconfig.binfmt"
2112
2113config ARTHUR
2114 tristate "RISC OS personality"
704bdda0 2115 depends on !AEABI
1da177e4
LT
2116 help
2117 Say Y here to include the kernel code necessary if you want to run
2118 Acorn RISC OS/Arthur binaries under Linux. This code is still very
2119 experimental; if this sounds frightening, say N and sleep in peace.
2120 You can also say M here to compile this support as a module (which
2121 will be called arthur).
2122
2123endmenu
2124
2125menu "Power management options"
2126
eceab4ac 2127source "kernel/power/Kconfig"
1da177e4 2128
f4cb5700 2129config ARCH_SUSPEND_POSSIBLE
19a0519d 2130 depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
f0d75153 2131 CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
f4cb5700
JB
2132 def_bool y
2133
15e0d9e3
AB
2134config ARM_CPU_SUSPEND
2135 def_bool PM_SLEEP
2136
603fb42a
SC
2137config ARCH_HIBERNATION_POSSIBLE
2138 bool
2139 depends on MMU
2140 default y if ARCH_SUSPEND_POSSIBLE
2141
1da177e4
LT
2142endmenu
2143
d5950b43
SR
2144source "net/Kconfig"
2145
ac25150f 2146source "drivers/Kconfig"
1da177e4
LT
2147
2148source "fs/Kconfig"
2149
1da177e4
LT
2150source "arch/arm/Kconfig.debug"
2151
2152source "security/Kconfig"
2153
2154source "crypto/Kconfig"
2155
2156source "lib/Kconfig"
749cf76c
CD
2157
2158source "arch/arm/kvm/Kconfig"
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