xref: /linux/arch/arm/Kconfig (revision 590b460c3e1399ca50c8f1b23f041e88cf9644d5)
11da177e4SLinus Torvaldsconfig ARM
21da177e4SLinus Torvalds	bool
31da177e4SLinus Torvalds	default y
47463449bSCatalin Marinas	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
521266be9SDan Williams	select ARCH_HAS_DEVMEM_IS_ALLOWED
62b68f6caSKees Cook	select ARCH_HAS_ELF_RANDOMIZE
73d06770eSMark Rutland	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
8171b3f0dSRussell King	select ARCH_HAVE_CUSTOM_GPIO_H
9957e3facSRiku Voipio	select ARCH_HAS_GCOV_PROFILE_ALL
10d7018848SMark Salter	select ARCH_MIGHT_HAVE_PC_PARPORT
114badad35SPeter Zijlstra	select ARCH_SUPPORTS_ATOMIC_RMW
12017f161aSKim Phillips	select ARCH_USE_BUILTIN_BSWAP
130cbad9c9SWill Deacon	select ARCH_USE_CMPXCHG_LOCKREF
14b1b3f49cSRussell King	select ARCH_WANT_IPC_PARSE_VERSION
15ee951c63SStephen Boyd	select BUILDTIME_EXTABLE_SORT if MMU
16171b3f0dSRussell King	select CLONE_BACKWARDS
17b1b3f49cSRussell King	select CPU_PM if (SUSPEND || CPU_IDLE)
18dce5c9e3SWill Deacon	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
19b01aec9bSBorislav Petkov	select EDAC_SUPPORT
20b01aec9bSBorislav Petkov	select EDAC_ATOMIC_SCRUB
2136d0fd21SLaura Abbott	select GENERIC_ALLOCATOR
224477ca45SUwe Kleine-König	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
23b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
242937367bSArd Biesheuvel	select GENERIC_EARLY_IOREMAP
25171b3f0dSRussell King	select GENERIC_IDLE_POLL_SETUP
26b1b3f49cSRussell King	select GENERIC_IRQ_PROBE
27b1b3f49cSRussell King	select GENERIC_IRQ_SHOW
287c07005eSGeert Uytterhoeven	select GENERIC_IRQ_SHOW_LEVEL
29b1b3f49cSRussell King	select GENERIC_PCI_IOMAP
3038ff87f7SStephen Boyd	select GENERIC_SCHED_CLOCK
31b1b3f49cSRussell King	select GENERIC_SMP_IDLE_THREAD
32b1b3f49cSRussell King	select GENERIC_STRNCPY_FROM_USER
33b1b3f49cSRussell King	select GENERIC_STRNLEN_USER
34a71b092aSMarc Zyngier	select HANDLE_DOMAIN_IRQ
35b1b3f49cSRussell King	select HARDIRQS_SW_RESEND
367a017721SAKASHI Takahiro	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
370b7857dbSYalin Wang	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
38437682eeSArnd Bergmann	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32 && MMU
39437682eeSArnd Bergmann	select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU
40e0c25d95SDaniel Cashman	select HAVE_ARCH_MMAP_RND_BITS if MMU
4191702175SKees Cook	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
420693bf68SWade Farnsworth	select HAVE_ARCH_TRACEHOOK
43b329f95dSJens Wiklander	select HAVE_ARM_SMCCC if CPU_V7
44b1b3f49cSRussell King	select HAVE_BPF_JIT
4551aaf81fSRussell King	select HAVE_CC_STACKPROTECTOR
46171b3f0dSRussell King	select HAVE_CONTEXT_TRACKING
47b1b3f49cSRussell King	select HAVE_C_RECORDMCOUNT
48b1b3f49cSRussell King	select HAVE_DEBUG_KMEMLEAK
49b1b3f49cSRussell King	select HAVE_DMA_API_DEBUG
50b1b3f49cSRussell King	select HAVE_DMA_CONTIGUOUS if MMU
51437682eeSArnd Bergmann	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32 && MMU
52dce5c9e3SWill Deacon	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
53b1b3f49cSRussell King	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
54b1b3f49cSRussell King	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
55b1b3f49cSRussell King	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
56b1b3f49cSRussell King	select HAVE_GENERIC_DMA_COHERENT
57b1b3f49cSRussell King	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
58b1b3f49cSRussell King	select HAVE_IDE if PCI || ISA || PCMCIA
5987c46b6cSRussell King	select HAVE_IRQ_TIME_ACCOUNTING
60b1b3f49cSRussell King	select HAVE_KERNEL_GZIP
61f9b493acSKyungsik Lee	select HAVE_KERNEL_LZ4
62b1b3f49cSRussell King	select HAVE_KERNEL_LZMA
63b1b3f49cSRussell King	select HAVE_KERNEL_LZO
64b1b3f49cSRussell King	select HAVE_KERNEL_XZ
65cb1293e2SArnd Bergmann	select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
669edddaa2SAnanth N Mavinakayanahalli	select HAVE_KRETPROBES if (HAVE_KPROBES)
67b1b3f49cSRussell King	select HAVE_MEMBLOCK
687d485f64SArd Biesheuvel	select HAVE_MOD_ARCH_SPECIFIC
69b1b3f49cSRussell King	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
700dc016dbSWang Nan	select HAVE_OPTPROBES if !THUMB2_KERNEL
717ada189fSJamie Iles	select HAVE_PERF_EVENTS
7249863894SWill Deacon	select HAVE_PERF_REGS
7349863894SWill Deacon	select HAVE_PERF_USER_STACK_DUMP
74a0ad5496SSteve Capper	select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
75e513f8bfSWill Deacon	select HAVE_REGS_AND_STACK_ACCESS_API
76b1b3f49cSRussell King	select HAVE_SYSCALL_TRACEPOINTS
77af1839ebSCatalin Marinas	select HAVE_UID16
7831c1fc81SKevin Hilman	select HAVE_VIRT_CPU_ACCOUNTING_GEN
79da0ec6f7SThomas Gleixner	select IRQ_FORCED_THREADING
80171b3f0dSRussell King	select MODULES_USE_ELF_REL
8184f452b1SSantosh Shilimkar	select NO_BOOTMEM
82aa7d5f18SArnd Bergmann	select OF_EARLY_FLATTREE if OF
83aa7d5f18SArnd Bergmann	select OF_RESERVED_MEM if OF
84171b3f0dSRussell King	select OLD_SIGACTION
85171b3f0dSRussell King	select OLD_SIGSUSPEND3
86b1b3f49cSRussell King	select PERF_USE_VMALLOC
87b1b3f49cSRussell King	select RTC_LIB
88b1b3f49cSRussell King	select SYS_SUPPORTS_APM_EMULATION
89171b3f0dSRussell King	# Above selects are sorted alphabetically; please add new ones
90171b3f0dSRussell King	# according to that.  Thanks.
911da177e4SLinus Torvalds	help
921da177e4SLinus Torvalds	  The ARM series is a line of low-power-consumption RISC chip designs
93f6c8965aSMartin Michlmayr	  licensed by ARM Ltd and targeted at embedded applications and
941da177e4SLinus Torvalds	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
951da177e4SLinus Torvalds	  manufactured, but legacy ARM-based PC hardware remains popular in
961da177e4SLinus Torvalds	  Europe.  There is an ARM Linux project with a web page at
971da177e4SLinus Torvalds	  <http://www.arm.linux.org.uk/>.
981da177e4SLinus Torvalds
9974facffeSRussell Kingconfig ARM_HAS_SG_CHAIN
100308c09f1SLaura Abbott	select ARCH_HAS_SG_CHAIN
10174facffeSRussell King	bool
10274facffeSRussell King
1034ce63fcdSMarek Szyprowskiconfig NEED_SG_DMA_LENGTH
1044ce63fcdSMarek Szyprowski	bool
1054ce63fcdSMarek Szyprowski
1064ce63fcdSMarek Szyprowskiconfig ARM_DMA_USE_IOMMU
1074ce63fcdSMarek Szyprowski	bool
108b1b3f49cSRussell King	select ARM_HAS_SG_CHAIN
109b1b3f49cSRussell King	select NEED_SG_DMA_LENGTH
1104ce63fcdSMarek Szyprowski
11160460abfSSeung-Woo Kimif ARM_DMA_USE_IOMMU
11260460abfSSeung-Woo Kim
11360460abfSSeung-Woo Kimconfig ARM_DMA_IOMMU_ALIGNMENT
11460460abfSSeung-Woo Kim	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
11560460abfSSeung-Woo Kim	range 4 9
11660460abfSSeung-Woo Kim	default 8
11760460abfSSeung-Woo Kim	help
11860460abfSSeung-Woo Kim	  DMA mapping framework by default aligns all buffers to the smallest
11960460abfSSeung-Woo Kim	  PAGE_SIZE order which is greater than or equal to the requested buffer
12060460abfSSeung-Woo Kim	  size. This works well for buffers up to a few hundreds kilobytes, but
12160460abfSSeung-Woo Kim	  for larger buffers it just a waste of address space. Drivers which has
12260460abfSSeung-Woo Kim	  relatively small addressing window (like 64Mib) might run out of
12360460abfSSeung-Woo Kim	  virtual space with just a few allocations.
12460460abfSSeung-Woo Kim
12560460abfSSeung-Woo Kim	  With this parameter you can specify the maximum PAGE_SIZE order for
12660460abfSSeung-Woo Kim	  DMA IOMMU buffers. Larger buffers will be aligned only to this
12760460abfSSeung-Woo Kim	  specified order. The order is expressed as a power of two multiplied
12860460abfSSeung-Woo Kim	  by the PAGE_SIZE.
12960460abfSSeung-Woo Kim
13060460abfSSeung-Woo Kimendif
13160460abfSSeung-Woo Kim
1320b05da72SHans Ulli Krollconfig MIGHT_HAVE_PCI
1330b05da72SHans Ulli Kroll	bool
1340b05da72SHans Ulli Kroll
13575e7153aSRalf Baechleconfig SYS_SUPPORTS_APM_EMULATION
13675e7153aSRalf Baechle	bool
13775e7153aSRalf Baechle
138bc581770SLinus Walleijconfig HAVE_TCM
139bc581770SLinus Walleij	bool
140bc581770SLinus Walleij	select GENERIC_ALLOCATOR
141bc581770SLinus Walleij
142e119bfffSRussell Kingconfig HAVE_PROC_CPU
143e119bfffSRussell King	bool
144e119bfffSRussell King
145ce816fa8SUwe Kleine-Königconfig NO_IOPORT_MAP
1465ea81769SAl Viro	bool
1475ea81769SAl Viro
1481da177e4SLinus Torvaldsconfig EISA
1491da177e4SLinus Torvalds	bool
1501da177e4SLinus Torvalds	---help---
1511da177e4SLinus Torvalds	  The Extended Industry Standard Architecture (EISA) bus was
1521da177e4SLinus Torvalds	  developed as an open alternative to the IBM MicroChannel bus.
1531da177e4SLinus Torvalds
1541da177e4SLinus Torvalds	  The EISA bus provided some of the features of the IBM MicroChannel
1551da177e4SLinus Torvalds	  bus while maintaining backward compatibility with cards made for
1561da177e4SLinus Torvalds	  the older ISA bus.  The EISA bus saw limited use between 1988 and
1571da177e4SLinus Torvalds	  1995 when it was made obsolete by the PCI bus.
1581da177e4SLinus Torvalds
1591da177e4SLinus Torvalds	  Say Y here if you are building a kernel for an EISA-based machine.
1601da177e4SLinus Torvalds
1611da177e4SLinus Torvalds	  Otherwise, say N.
1621da177e4SLinus Torvalds
1631da177e4SLinus Torvaldsconfig SBUS
1641da177e4SLinus Torvalds	bool
1651da177e4SLinus Torvalds
166f16fb1ecSRussell Kingconfig STACKTRACE_SUPPORT
167f16fb1ecSRussell King	bool
168f16fb1ecSRussell King	default y
169f16fb1ecSRussell King
170f16fb1ecSRussell Kingconfig LOCKDEP_SUPPORT
171f16fb1ecSRussell King	bool
172f16fb1ecSRussell King	default y
173f16fb1ecSRussell King
1747ad1bcb2SRussell Kingconfig TRACE_IRQFLAGS_SUPPORT
1757ad1bcb2SRussell King	bool
176cb1293e2SArnd Bergmann	default !CPU_V7M
1777ad1bcb2SRussell King
1781da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM
1791da177e4SLinus Torvalds	bool
1808a87411bSWill Deacon	default y
1811da177e4SLinus Torvalds
182f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U32
183f0d1b0b3SDavid Howells	bool
184f0d1b0b3SDavid Howells
185f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U64
186f0d1b0b3SDavid Howells	bool
187f0d1b0b3SDavid Howells
1884a1b5733SEduardo Valentinconfig ARCH_HAS_BANDGAP
1894a1b5733SEduardo Valentin	bool
1904a1b5733SEduardo Valentin
191a5f4c561SStefan Agnerconfig FIX_EARLYCON_MEM
192a5f4c561SStefan Agner	def_bool y if MMU
193a5f4c561SStefan Agner
194b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT
195b89c3b16SAkinobu Mita	bool
196b89c3b16SAkinobu Mita	default y
197b89c3b16SAkinobu Mita
1981da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY
1991da177e4SLinus Torvalds	bool
2001da177e4SLinus Torvalds	default y
2011da177e4SLinus Torvalds
202a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC
203a08b6b79Sviro@ZenIV.linux.org.uk	bool
204a08b6b79Sviro@ZenIV.linux.org.uk
2055ac6da66SChristoph Lameterconfig ZONE_DMA
2065ac6da66SChristoph Lameter	bool
2075ac6da66SChristoph Lameter
208ccd7ab7fSFUJITA Tomonoriconfig NEED_DMA_MAP_STATE
209ccd7ab7fSFUJITA Tomonori       def_bool y
210ccd7ab7fSFUJITA Tomonori
211c7edc9e3SDavid A. Longconfig ARCH_SUPPORTS_UPROBES
212c7edc9e3SDavid A. Long	def_bool y
213c7edc9e3SDavid A. Long
21458af4a24SRob Herringconfig ARCH_HAS_DMA_SET_COHERENT_MASK
21558af4a24SRob Herring	bool
21658af4a24SRob Herring
2171da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA
2181da177e4SLinus Torvalds	bool
2191da177e4SLinus Torvalds
2201da177e4SLinus Torvaldsconfig FIQ
2211da177e4SLinus Torvalds	bool
2221da177e4SLinus Torvalds
22313a5045dSRob Herringconfig NEED_RET_TO_USER
22413a5045dSRob Herring	bool
22513a5045dSRob Herring
226034d2f5aSAl Viroconfig ARCH_MTD_XIP
227034d2f5aSAl Viro	bool
228034d2f5aSAl Viro
229c760fc19SHyok S. Choiconfig VECTORS_BASE
230c760fc19SHyok S. Choi	hex
2316afd6faeSHyok S. Choi	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
232c760fc19SHyok S. Choi	default DRAM_BASE if REMAP_VECTORS_TO_RAM
233c760fc19SHyok S. Choi	default 0x00000000
234c760fc19SHyok S. Choi	help
23519accfd3SRussell King	  The base address of exception vectors.  This must be two pages
23619accfd3SRussell King	  in size.
237c760fc19SHyok S. Choi
238dc21af99SRussell Kingconfig ARM_PATCH_PHYS_VIRT
239c1becedcSRussell King	bool "Patch physical to virtual translations at runtime" if EMBEDDED
240c1becedcSRussell King	default y
241b511d75dSNicolas Pitre	depends on !XIP_KERNEL && MMU
242dc21af99SRussell King	help
243111e9a5cSRussell King	  Patch phys-to-virt and virt-to-phys translation functions at
244111e9a5cSRussell King	  boot and module load time according to the position of the
245111e9a5cSRussell King	  kernel in system memory.
246dc21af99SRussell King
247111e9a5cSRussell King	  This can only be used with non-XIP MMU kernels where the base
248daece596SNicolas Pitre	  of physical memory is at a 16MB boundary.
249dc21af99SRussell King
250c1becedcSRussell King	  Only disable this option if you know that you do not require
251c1becedcSRussell King	  this feature (eg, building a kernel for a single machine) and
252c1becedcSRussell King	  you need to shrink the kernel to the minimal size.
253c1becedcSRussell King
254c334bc15SRob Herringconfig NEED_MACH_IO_H
255c334bc15SRob Herring	bool
256c334bc15SRob Herring	help
257c334bc15SRob Herring	  Select this when mach/io.h is required to provide special
258c334bc15SRob Herring	  definitions for this platform.  The need for mach/io.h should
259c334bc15SRob Herring	  be avoided when possible.
260c334bc15SRob Herring
2610cdc8b92SNicolas Pitreconfig NEED_MACH_MEMORY_H
2621b9f95f8SNicolas Pitre	bool
263111e9a5cSRussell King	help
2640cdc8b92SNicolas Pitre	  Select this when mach/memory.h is required to provide special
2650cdc8b92SNicolas Pitre	  definitions for this platform.  The need for mach/memory.h should
2660cdc8b92SNicolas Pitre	  be avoided when possible.
2671b9f95f8SNicolas Pitre
2681b9f95f8SNicolas Pitreconfig PHYS_OFFSET
269974c0724SNicolas Pitre	hex "Physical address of main memory" if MMU
270c6f54a9bSUwe Kleine-König	depends on !ARM_PATCH_PHYS_VIRT
271974c0724SNicolas Pitre	default DRAM_BASE if !MMU
272c6f54a9bSUwe Kleine-König	default 0x00000000 if ARCH_EBSA110 || \
273c6f54a9bSUwe Kleine-König			ARCH_FOOTBRIDGE || \
274c6f54a9bSUwe Kleine-König			ARCH_INTEGRATOR || \
275c6f54a9bSUwe Kleine-König			ARCH_IOP13XX || \
276c6f54a9bSUwe Kleine-König			ARCH_KS8695 || \
277c6f54a9bSUwe Kleine-König			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
278c6f54a9bSUwe Kleine-König	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
279c6f54a9bSUwe Kleine-König	default 0x20000000 if ARCH_S5PV210
280c6f54a9bSUwe Kleine-König	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
281b8824c9aSH Hartley Sweeten	default 0xc0000000 if ARCH_SA1100
2821b9f95f8SNicolas Pitre	help
2831b9f95f8SNicolas Pitre	  Please provide the physical address corresponding to the
2841b9f95f8SNicolas Pitre	  location of main memory in your system.
285cada3c08SRussell King
28687e040b6SSimon Glassconfig GENERIC_BUG
28787e040b6SSimon Glass	def_bool y
28887e040b6SSimon Glass	depends on BUG
28987e040b6SSimon Glass
2901bcad26eSKirill A. Shutemovconfig PGTABLE_LEVELS
2911bcad26eSKirill A. Shutemov	int
2921bcad26eSKirill A. Shutemov	default 3 if ARM_LPAE
2931bcad26eSKirill A. Shutemov	default 2
2941bcad26eSKirill A. Shutemov
2951da177e4SLinus Torvaldssource "init/Kconfig"
2961da177e4SLinus Torvalds
297dc52ddc0SMatt Helsleysource "kernel/Kconfig.freezer"
298dc52ddc0SMatt Helsley
2991da177e4SLinus Torvaldsmenu "System Type"
3001da177e4SLinus Torvalds
3013c427975SHyok S. Choiconfig MMU
3023c427975SHyok S. Choi	bool "MMU-based Paged Memory Management Support"
3033c427975SHyok S. Choi	default y
3043c427975SHyok S. Choi	help
3053c427975SHyok S. Choi	  Select if you want MMU-based virtualised addressing space
3063c427975SHyok S. Choi	  support by paged memory management. If unsure, say 'Y'.
3073c427975SHyok S. Choi
308e0c25d95SDaniel Cashmanconfig ARCH_MMAP_RND_BITS_MIN
309e0c25d95SDaniel Cashman	default 8
310e0c25d95SDaniel Cashman
311e0c25d95SDaniel Cashmanconfig ARCH_MMAP_RND_BITS_MAX
312e0c25d95SDaniel Cashman	default 14 if PAGE_OFFSET=0x40000000
313e0c25d95SDaniel Cashman	default 15 if PAGE_OFFSET=0x80000000
314e0c25d95SDaniel Cashman	default 16
315e0c25d95SDaniel Cashman
316ccf50e23SRussell King#
317ccf50e23SRussell King# The "ARM system type" choice list is ordered alphabetically by option
318ccf50e23SRussell King# text.  Please add new entries in the option alphabetic order.
319ccf50e23SRussell King#
3201da177e4SLinus Torvaldschoice
3211da177e4SLinus Torvalds	prompt "ARM system type"
32270722803SArnd Bergmann	default ARM_SINGLE_ARMV7M if !MMU
3231420b22bSArnd Bergmann	default ARCH_MULTIPLATFORM if MMU
3241da177e4SLinus Torvalds
325387798b3SRob Herringconfig ARCH_MULTIPLATFORM
326387798b3SRob Herring	bool "Allow multiple platforms to be selected"
327b1b3f49cSRussell King	depends on MMU
328ddb902ccSRob Herring	select ARCH_WANT_OPTIONAL_GPIOLIB
32942dc836dSOlof Johansson	select ARM_HAS_SG_CHAIN
330387798b3SRob Herring	select ARM_PATCH_PHYS_VIRT
331387798b3SRob Herring	select AUTO_ZRELADDR
3326d0add40SRob Herring	select CLKSRC_OF
33366314223SDinh Nguyen	select COMMON_CLK
334ddb902ccSRob Herring	select GENERIC_CLOCKEVENTS
33508d38bebSWill Deacon	select MIGHT_HAVE_PCI
336387798b3SRob Herring	select MULTI_IRQ_HANDLER
33766314223SDinh Nguyen	select SPARSE_IRQ
33866314223SDinh Nguyen	select USE_OF
33966314223SDinh Nguyen
3409c77bc43SStefan Agnerconfig ARM_SINGLE_ARMV7M
3419c77bc43SStefan Agner	bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
3429c77bc43SStefan Agner	depends on !MMU
3439c77bc43SStefan Agner	select ARCH_WANT_OPTIONAL_GPIOLIB
3449c77bc43SStefan Agner	select ARM_NVIC
345499f1640SStefan Agner	select AUTO_ZRELADDR
3469c77bc43SStefan Agner	select CLKSRC_OF
3479c77bc43SStefan Agner	select COMMON_CLK
3489c77bc43SStefan Agner	select CPU_V7M
3499c77bc43SStefan Agner	select GENERIC_CLOCKEVENTS
3509c77bc43SStefan Agner	select NO_IOPORT_MAP
3519c77bc43SStefan Agner	select SPARSE_IRQ
3529c77bc43SStefan Agner	select USE_OF
3539c77bc43SStefan Agner
3544af6fee1SDeepak Saxena
35593e22567SRussell Kingconfig ARCH_CLPS711X
35693e22567SRussell King	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
357a3b8d4a5SAlexander Shiyan	select ARCH_REQUIRE_GPIOLIB
358ea7d1bc9SAlexander Shiyan	select AUTO_ZRELADDR
359c99f72adSAlexander Shiyan	select CLKSRC_MMIO
36093e22567SRussell King	select COMMON_CLK
36193e22567SRussell King	select CPU_ARM720T
3624a8355c4SAlexander Shiyan	select GENERIC_CLOCKEVENTS
3636597619fSAlexander Shiyan	select MFD_SYSCON
364e4e3a37dSAlexander Shiyan	select SOC_BUS
36593e22567SRussell King	help
36693e22567SRussell King	  Support for Cirrus Logic 711x/721x/731x based boards.
36793e22567SRussell King
368788c9700SRussell Kingconfig ARCH_GEMINI
369788c9700SRussell King	bool "Cortina Systems Gemini"
370788c9700SRussell King	select ARCH_REQUIRE_GPIOLIB
371f3372c01SLinus Walleij	select CLKSRC_MMIO
372b1b3f49cSRussell King	select CPU_FA526
373f3372c01SLinus Walleij	select GENERIC_CLOCKEVENTS
374788c9700SRussell King	help
375788c9700SRussell King	  Support for the Cortina Systems Gemini family SoCs
376788c9700SRussell King
3771da177e4SLinus Torvaldsconfig ARCH_EBSA110
3781da177e4SLinus Torvalds	bool "EBSA-110"
379b1b3f49cSRussell King	select ARCH_USES_GETTIMEOFFSET
380c750815eSRussell King	select CPU_SA110
381f7e68bbfSRussell King	select ISA
382c334bc15SRob Herring	select NEED_MACH_IO_H
3830cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
384ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
3851da177e4SLinus Torvalds	help
3861da177e4SLinus Torvalds	  This is an evaluation board for the StrongARM processor available
387f6c8965aSMartin Michlmayr	  from Digital. It has limited hardware on-board, including an
3881da177e4SLinus Torvalds	  Ethernet interface, two PCMCIA sockets, two serial ports and a
3891da177e4SLinus Torvalds	  parallel port.
3901da177e4SLinus Torvalds
391e7736d47SLennert Buytenhekconfig ARCH_EP93XX
392e7736d47SLennert Buytenhek	bool "EP93xx-based"
393b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
394b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
395e7736d47SLennert Buytenhek	select ARM_AMBA
396b8824c9aSH Hartley Sweeten	select ARM_PATCH_PHYS_VIRT
397e7736d47SLennert Buytenhek	select ARM_VIC
398b8824c9aSH Hartley Sweeten	select AUTO_ZRELADDR
3996d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
400000bc178SLinus Walleij	select CLKSRC_MMIO
401b1b3f49cSRussell King	select CPU_ARM920T
402000bc178SLinus Walleij	select GENERIC_CLOCKEVENTS
403e7736d47SLennert Buytenhek	help
404e7736d47SLennert Buytenhek	  This enables support for the Cirrus EP93xx series of CPUs.
405e7736d47SLennert Buytenhek
4061da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE
4071da177e4SLinus Torvalds	bool "FootBridge"
408c750815eSRussell King	select CPU_SA110
4091da177e4SLinus Torvalds	select FOOTBRIDGE
4104e8d7637SRussell King	select GENERIC_CLOCKEVENTS
411d0ee9f40SArnd Bergmann	select HAVE_IDE
4128ef6e620SRob Herring	select NEED_MACH_IO_H if !MMU
4130cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
414f999b8bdSMartin Michlmayr	help
415f999b8bdSMartin Michlmayr	  Support for systems based on the DC21285 companion chip
416f999b8bdSMartin Michlmayr	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
4171da177e4SLinus Torvalds
4184af6fee1SDeepak Saxenaconfig ARCH_NETX
4194af6fee1SDeepak Saxena	bool "Hilscher NetX based"
420b1b3f49cSRussell King	select ARM_VIC
421234b6cedSRussell King	select CLKSRC_MMIO
422c750815eSRussell King	select CPU_ARM926T
4232fcfe6b8SUwe Kleine-König	select GENERIC_CLOCKEVENTS
424f999b8bdSMartin Michlmayr	help
4254af6fee1SDeepak Saxena	  This enables support for systems based on the Hilscher NetX Soc
4264af6fee1SDeepak Saxena
4273b938be6SRussell Kingconfig ARCH_IOP13XX
4283b938be6SRussell King	bool "IOP13xx-based"
4293b938be6SRussell King	depends on MMU
430b1b3f49cSRussell King	select CPU_XSC3
4310cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
43213a5045dSRob Herring	select NEED_RET_TO_USER
433b1b3f49cSRussell King	select PCI
434b1b3f49cSRussell King	select PLAT_IOP
435b1b3f49cSRussell King	select VMSPLIT_1G
43637ebbcffSThomas Gleixner	select SPARSE_IRQ
4373b938be6SRussell King	help
4383b938be6SRussell King	  Support for Intel's IOP13XX (XScale) family of processors.
4393b938be6SRussell King
4403f7e5815SLennert Buytenhekconfig ARCH_IOP32X
4413f7e5815SLennert Buytenhek	bool "IOP32x-based"
442a4f7e763SRussell King	depends on MMU
443b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
444c750815eSRussell King	select CPU_XSCALE
445e9004f50SLinus Walleij	select GPIO_IOP
44613a5045dSRob Herring	select NEED_RET_TO_USER
447f7e68bbfSRussell King	select PCI
448b1b3f49cSRussell King	select PLAT_IOP
449f999b8bdSMartin Michlmayr	help
4503f7e5815SLennert Buytenhek	  Support for Intel's 80219 and IOP32X (XScale) family of
4513f7e5815SLennert Buytenhek	  processors.
4523f7e5815SLennert Buytenhek
4533f7e5815SLennert Buytenhekconfig ARCH_IOP33X
4543f7e5815SLennert Buytenhek	bool "IOP33x-based"
4553f7e5815SLennert Buytenhek	depends on MMU
456b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
457c750815eSRussell King	select CPU_XSCALE
458e9004f50SLinus Walleij	select GPIO_IOP
45913a5045dSRob Herring	select NEED_RET_TO_USER
4603f7e5815SLennert Buytenhek	select PCI
461b1b3f49cSRussell King	select PLAT_IOP
4623f7e5815SLennert Buytenhek	help
4633f7e5815SLennert Buytenhek	  Support for Intel's IOP33X (XScale) family of processors.
4641da177e4SLinus Torvalds
4653b938be6SRussell Kingconfig ARCH_IXP4XX
4663b938be6SRussell King	bool "IXP4xx-based"
467a4f7e763SRussell King	depends on MMU
46858af4a24SRob Herring	select ARCH_HAS_DMA_SET_COHERENT_MASK
469b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
47051aaf81fSRussell King	select ARCH_SUPPORTS_BIG_ENDIAN
471234b6cedSRussell King	select CLKSRC_MMIO
472c750815eSRussell King	select CPU_XSCALE
473b1b3f49cSRussell King	select DMABOUNCE if PCI
4743b938be6SRussell King	select GENERIC_CLOCKEVENTS
4750b05da72SHans Ulli Kroll	select MIGHT_HAVE_PCI
476c334bc15SRob Herring	select NEED_MACH_IO_H
4779296d94dSFlorian Fainelli	select USB_EHCI_BIG_ENDIAN_DESC
478171b3f0dSRussell King	select USB_EHCI_BIG_ENDIAN_MMIO
479c4713074SLennert Buytenhek	help
4803b938be6SRussell King	  Support for Intel's IXP4XX (XScale) family of processors.
481c4713074SLennert Buytenhek
482edabd38eSSaeed Bisharaconfig ARCH_DOVE
483edabd38eSSaeed Bishara	bool "Marvell Dove"
484edabd38eSSaeed Bishara	select ARCH_REQUIRE_GPIOLIB
485756b2531SSebastian Hesselbarth	select CPU_PJ4
486edabd38eSSaeed Bishara	select GENERIC_CLOCKEVENTS
4870f81bd43SRussell King	select MIGHT_HAVE_PCI
488b8cd337cSArnd Bergmann	select MULTI_IRQ_HANDLER
489171b3f0dSRussell King	select MVEBU_MBUS
4909139acd1SSebastian Hesselbarth	select PINCTRL
4919139acd1SSebastian Hesselbarth	select PINCTRL_DOVE
492abcda1dcSThomas Petazzoni	select PLAT_ORION_LEGACY
4935cdbe5d2SArnd Bergmann	select SPARSE_IRQ
494c5d431e8SRussell King	select PM_GENERIC_DOMAINS if PM
495edabd38eSSaeed Bishara	help
496edabd38eSSaeed Bishara	  Support for the Marvell Dove SoC 88AP510
497edabd38eSSaeed Bishara
498c53c9cf6SAndrew Victorconfig ARCH_KS8695
499c53c9cf6SAndrew Victor	bool "Micrel/Kendin KS8695"
50072880ad8SDaniel Silverstone	select ARCH_REQUIRE_GPIOLIB
501c7e783d6SLinus Walleij	select CLKSRC_MMIO
502b1b3f49cSRussell King	select CPU_ARM922T
503c7e783d6SLinus Walleij	select GENERIC_CLOCKEVENTS
504b1b3f49cSRussell King	select NEED_MACH_MEMORY_H
505c53c9cf6SAndrew Victor	help
506c53c9cf6SAndrew Victor	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
507c53c9cf6SAndrew Victor	  System-on-Chip devices.
508c53c9cf6SAndrew Victor
509788c9700SRussell Kingconfig ARCH_W90X900
510788c9700SRussell King	bool "Nuvoton W90X900 CPU"
511c52d3d68Swanzongshun	select ARCH_REQUIRE_GPIOLIB
5126d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
5136fa5d5f7SRussell King	select CLKSRC_MMIO
514b1b3f49cSRussell King	select CPU_ARM926T
51558b5369eSwanzongshun	select GENERIC_CLOCKEVENTS
516777f9bebSLennert Buytenhek	help
517a8bc4eadSwanzongshun	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
518a8bc4eadSwanzongshun	  At present, the w90x900 has been renamed nuc900, regarding
519a8bc4eadSwanzongshun	  the ARM series product line, you can login the following
520a8bc4eadSwanzongshun	  link address to know more.
521a8bc4eadSwanzongshun
522a8bc4eadSwanzongshun	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
523a8bc4eadSwanzongshun		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
524585cf175STzachi Perelstein
52593e22567SRussell Kingconfig ARCH_LPC32XX
52693e22567SRussell King	bool "NXP LPC32XX"
52793e22567SRussell King	select ARCH_REQUIRE_GPIOLIB
52893e22567SRussell King	select ARM_AMBA
5294073723aSRussell King	select CLKDEV_LOOKUP
530234b6cedSRussell King	select CLKSRC_MMIO
53193e22567SRussell King	select CPU_ARM926T
53293e22567SRussell King	select GENERIC_CLOCKEVENTS
53393e22567SRussell King	select HAVE_IDE
53493e22567SRussell King	select USE_OF
53593e22567SRussell King	help
53693e22567SRussell King	  Support for the NXP LPC32XX family of processors
53793e22567SRussell King
5381da177e4SLinus Torvaldsconfig ARCH_PXA
5392c8086a5Seric miao	bool "PXA2xx/PXA3xx-based"
540a4f7e763SRussell King	depends on MMU
541b1b3f49cSRussell King	select ARCH_MTD_XIP
542b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
543b1b3f49cSRussell King	select ARM_CPU_SUSPEND if PM
544b1b3f49cSRussell King	select AUTO_ZRELADDR
545a1c0a6adSRobert Jarzmik	select COMMON_CLK
5466d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
547389d9b58SDaniel Lezcano	select CLKSRC_PXA
548234b6cedSRussell King	select CLKSRC_MMIO
5496f6caeaaSRobert Jarzmik	select CLKSRC_OF
550981d0f39SEric Miao	select GENERIC_CLOCKEVENTS
551157d2644SHaojian Zhuang	select GPIO_PXA
552b1b3f49cSRussell King	select HAVE_IDE
553d6cf30caSRobert Jarzmik	select IRQ_DOMAIN
554b1b3f49cSRussell King	select MULTI_IRQ_HANDLER
555bd5ce433SEric Miao	select PLAT_PXA
5566ac6b817SHaojian Zhuang	select SPARSE_IRQ
557f999b8bdSMartin Michlmayr	help
5582c8086a5Seric miao	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
5591da177e4SLinus Torvalds
5601da177e4SLinus Torvaldsconfig ARCH_RPC
5611da177e4SLinus Torvalds	bool "RiscPC"
562868e87ccSRussell King	depends on MMU
5631da177e4SLinus Torvalds	select ARCH_ACORN
564a08b6b79Sviro@ZenIV.linux.org.uk	select ARCH_MAY_HAVE_PC_FDC
56507f841b7SRussell King	select ARCH_SPARSEMEM_ENABLE
5665cfc8ee0SJohn Stultz	select ARCH_USES_GETTIMEOFFSET
567fa04e209SArnd Bergmann	select CPU_SA110
568b1b3f49cSRussell King	select FIQ
569d0ee9f40SArnd Bergmann	select HAVE_IDE
570b1b3f49cSRussell King	select HAVE_PATA_PLATFORM
571b1b3f49cSRussell King	select ISA_DMA_API
572c334bc15SRob Herring	select NEED_MACH_IO_H
5730cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
574ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
575b4811bacSArnd Bergmann	select VIRT_TO_BUS
5761da177e4SLinus Torvalds	help
5771da177e4SLinus Torvalds	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
5781da177e4SLinus Torvalds	  CD-ROM interface, serial and parallel port, and the floppy drive.
5791da177e4SLinus Torvalds
5801da177e4SLinus Torvaldsconfig ARCH_SA1100
5811da177e4SLinus Torvalds	bool "SA1100-based"
582b1b3f49cSRussell King	select ARCH_MTD_XIP
5837444a72eSMichael Buesch	select ARCH_REQUIRE_GPIOLIB
584b1b3f49cSRussell King	select ARCH_SPARSEMEM_ENABLE
585b1b3f49cSRussell King	select CLKDEV_LOOKUP
586b1b3f49cSRussell King	select CLKSRC_MMIO
587389d9b58SDaniel Lezcano	select CLKSRC_PXA
588389d9b58SDaniel Lezcano	select CLKSRC_OF if OF
589b1b3f49cSRussell King	select CPU_FREQ
590b1b3f49cSRussell King	select CPU_SA1100
591b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
592d0ee9f40SArnd Bergmann	select HAVE_IDE
5931eca42b4SDmitry Eremin-Solenikov	select IRQ_DOMAIN
594b1b3f49cSRussell King	select ISA
595affcab32SDmitry Eremin-Solenikov	select MULTI_IRQ_HANDLER
5960cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
597375dec92SRussell King	select SPARSE_IRQ
598f999b8bdSMartin Michlmayr	help
599f999b8bdSMartin Michlmayr	  Support for StrongARM 11x0 based boards.
6001da177e4SLinus Torvalds
601b130d5c2SKukjin Kimconfig ARCH_S3C24XX
602b130d5c2SKukjin Kim	bool "Samsung S3C24XX SoCs"
60353650430SKukjin Kim	select ARCH_REQUIRE_GPIOLIB
604335cce74SArnd Bergmann	select ATAGS
605b1b3f49cSRussell King	select CLKDEV_LOOKUP
6064280506aSTomasz Figa	select CLKSRC_SAMSUNG_PWM
6077f78b6ebSRomain Naour	select GENERIC_CLOCKEVENTS
608880cf071STomasz Figa	select GPIO_SAMSUNG
60920676c15SKukjin Kim	select HAVE_S3C2410_I2C if I2C
610b130d5c2SKukjin Kim	select HAVE_S3C2410_WATCHDOG if WATCHDOG
611b1b3f49cSRussell King	select HAVE_S3C_RTC if RTC_CLASS
61217453dd2SHeiko Stuebner	select MULTI_IRQ_HANDLER
613c334bc15SRob Herring	select NEED_MACH_IO_H
614cd8dc7aeSTomasz Figa	select SAMSUNG_ATAGS
6151da177e4SLinus Torvalds	help
616b130d5c2SKukjin Kim	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
617b130d5c2SKukjin Kim	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
618b130d5c2SKukjin Kim	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
619b130d5c2SKukjin Kim	  Samsung SMDK2410 development board (and derivatives).
62063b1f51bSBen Dooks
6217c6337e2SKevin Hilmanconfig ARCH_DAVINCI
6227c6337e2SKevin Hilman	bool "TI DaVinci"
623b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
624dce1115bSDavid Brownell	select ARCH_REQUIRE_GPIOLIB
6256d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
62620e9969bSDavid Brownell	select GENERIC_ALLOCATOR
627b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
628dc7ad3b3SRussell King	select GENERIC_IRQ_CHIP
629b1b3f49cSRussell King	select HAVE_IDE
630689e331fSSekhar Nori	select USE_OF
631b1b3f49cSRussell King	select ZONE_DMA
6327c6337e2SKevin Hilman	help
6337c6337e2SKevin Hilman	  Support for TI's DaVinci platform.
6347c6337e2SKevin Hilman
635a0694861STony Lindgrenconfig ARCH_OMAP1
636a0694861STony Lindgren	bool "TI OMAP1"
63700a36698SArnd Bergmann	depends on MMU
638b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
639a0694861STony Lindgren	select ARCH_OMAP
64021f47fbcSAlexey Charkov	select ARCH_REQUIRE_GPIOLIB
641e9a91de7STony Prisk	select CLKDEV_LOOKUP
642cee37e50Sviresh kumar	select CLKSRC_MMIO
643b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
644a0694861STony Lindgren	select GENERIC_IRQ_CHIP
645a0694861STony Lindgren	select HAVE_IDE
646a0694861STony Lindgren	select IRQ_DOMAIN
647b694331cSTony Lindgren	select MULTI_IRQ_HANDLER
648a0694861STony Lindgren	select NEED_MACH_IO_H if PCCARD
649a0694861STony Lindgren	select NEED_MACH_MEMORY_H
650685e2d08STony Lindgren	select SPARSE_IRQ
65121f47fbcSAlexey Charkov	help
652a0694861STony Lindgren	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
65302c981c0SBinghua Duan
6541da177e4SLinus Torvaldsendchoice
6551da177e4SLinus Torvalds
656387798b3SRob Herringmenu "Multiple platform selection"
657387798b3SRob Herring	depends on ARCH_MULTIPLATFORM
658387798b3SRob Herring
659387798b3SRob Herringcomment "CPU Core family selection"
660387798b3SRob Herring
661f8afae40SArnd Bergmannconfig ARCH_MULTI_V4
662f8afae40SArnd Bergmann	bool "ARMv4 based platforms (FA526)"
663f8afae40SArnd Bergmann	depends on !ARCH_MULTI_V6_V7
664f8afae40SArnd Bergmann	select ARCH_MULTI_V4_V5
665f8afae40SArnd Bergmann	select CPU_FA526
666f8afae40SArnd Bergmann
667387798b3SRob Herringconfig ARCH_MULTI_V4T
668387798b3SRob Herring	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
669387798b3SRob Herring	depends on !ARCH_MULTI_V6_V7
670b1b3f49cSRussell King	select ARCH_MULTI_V4_V5
67124e860fbSArnd Bergmann	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
67224e860fbSArnd Bergmann		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
67324e860fbSArnd Bergmann		CPU_ARM925T || CPU_ARM940T)
674387798b3SRob Herring
675387798b3SRob Herringconfig ARCH_MULTI_V5
676387798b3SRob Herring	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
677387798b3SRob Herring	depends on !ARCH_MULTI_V6_V7
678b1b3f49cSRussell King	select ARCH_MULTI_V4_V5
67912567bbdSAndrew Lunn	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
68024e860fbSArnd Bergmann		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
68124e860fbSArnd Bergmann		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
682387798b3SRob Herring
683387798b3SRob Herringconfig ARCH_MULTI_V4_V5
684387798b3SRob Herring	bool
685387798b3SRob Herring
686387798b3SRob Herringconfig ARCH_MULTI_V6
6878dda05ccSStephen Boyd	bool "ARMv6 based platforms (ARM11)"
688387798b3SRob Herring	select ARCH_MULTI_V6_V7
68942f4754aSRob Herring	select CPU_V6K
690387798b3SRob Herring
691387798b3SRob Herringconfig ARCH_MULTI_V7
6928dda05ccSStephen Boyd	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
693387798b3SRob Herring	default y
694387798b3SRob Herring	select ARCH_MULTI_V6_V7
695b1b3f49cSRussell King	select CPU_V7
69690bc8ac7SRob Herring	select HAVE_SMP
697387798b3SRob Herring
698387798b3SRob Herringconfig ARCH_MULTI_V6_V7
699387798b3SRob Herring	bool
7009352b05bSRob Herring	select MIGHT_HAVE_CACHE_L2X0
701387798b3SRob Herring
702387798b3SRob Herringconfig ARCH_MULTI_CPU_AUTO
703387798b3SRob Herring	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
704387798b3SRob Herring	select ARCH_MULTI_V5
705387798b3SRob Herring
706387798b3SRob Herringendmenu
707387798b3SRob Herring
70805e2a3deSRob Herringconfig ARCH_VIRT
709e3246542SMasahiro Yamada	bool "Dummy Virtual Machine"
710e3246542SMasahiro Yamada	depends on ARCH_MULTI_V7
7114b8b5f25SRob Herring	select ARM_AMBA
71205e2a3deSRob Herring	select ARM_GIC
7130e2f91e9SPavel Fedin	select ARM_GIC_V2M if PCI_MSI
7140b28f1dbSJean-Philippe Brucker	select ARM_GIC_V3
71505e2a3deSRob Herring	select ARM_PSCI
7164b8b5f25SRob Herring	select HAVE_ARM_ARCH_TIMER
71705e2a3deSRob Herring
718ccf50e23SRussell King#
719ccf50e23SRussell King# This is sorted alphabetically by mach-* pathname.  However, plat-*
720ccf50e23SRussell King# Kconfigs may be included either alphabetically (according to the
721ccf50e23SRussell King# plat- suffix) or along side the corresponding mach-* source.
722ccf50e23SRussell King#
7233e93a22bSGregory CLEMENTsource "arch/arm/mach-mvebu/Kconfig"
7243e93a22bSGregory CLEMENT
725445d9b30STsahee Zidenbergsource "arch/arm/mach-alpine/Kconfig"
726445d9b30STsahee Zidenberg
727*590b460cSLars Perssonsource "arch/arm/mach-artpec/Kconfig"
728*590b460cSLars Persson
729d9bfc86dSOleksij Rempelsource "arch/arm/mach-asm9260/Kconfig"
730d9bfc86dSOleksij Rempel
73195b8f20fSRussell Kingsource "arch/arm/mach-at91/Kconfig"
73295b8f20fSRussell King
7331d22924eSAnders Bergsource "arch/arm/mach-axxia/Kconfig"
7341d22924eSAnders Berg
7358ac49e04SChristian Daudtsource "arch/arm/mach-bcm/Kconfig"
7368ac49e04SChristian Daudt
7371c37fa10SSebastian Hesselbarthsource "arch/arm/mach-berlin/Kconfig"
7381c37fa10SSebastian Hesselbarth
7391da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig"
7401da177e4SLinus Torvalds
741d94f944eSAnton Vorontsovsource "arch/arm/mach-cns3xxx/Kconfig"
742d94f944eSAnton Vorontsov
74395b8f20fSRussell Kingsource "arch/arm/mach-davinci/Kconfig"
74495b8f20fSRussell King
745df8d742eSBaruch Siachsource "arch/arm/mach-digicolor/Kconfig"
746df8d742eSBaruch Siach
74795b8f20fSRussell Kingsource "arch/arm/mach-dove/Kconfig"
74895b8f20fSRussell King
749e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig"
750e7736d47SLennert Buytenhek
7511da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig"
7521da177e4SLinus Torvalds
75359d3a193SPaulius Zaleckassource "arch/arm/mach-gemini/Kconfig"
75459d3a193SPaulius Zaleckas
755387798b3SRob Herringsource "arch/arm/mach-highbank/Kconfig"
756387798b3SRob Herring
757389ee0c2SHaojian Zhuangsource "arch/arm/mach-hisi/Kconfig"
758389ee0c2SHaojian Zhuang
7591da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig"
7601da177e4SLinus Torvalds
7613f7e5815SLennert Buytenheksource "arch/arm/mach-iop32x/Kconfig"
7623f7e5815SLennert Buytenhek
7633f7e5815SLennert Buytenheksource "arch/arm/mach-iop33x/Kconfig"
7641da177e4SLinus Torvalds
765285f5fa7SDan Williamssource "arch/arm/mach-iop13xx/Kconfig"
766285f5fa7SDan Williams
7671da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig"
7681da177e4SLinus Torvalds
769828989adSSantosh Shilimkarsource "arch/arm/mach-keystone/Kconfig"
770828989adSSantosh Shilimkar
77195b8f20fSRussell Kingsource "arch/arm/mach-ks8695/Kconfig"
77295b8f20fSRussell King
7733b8f5030SCarlo Caionesource "arch/arm/mach-meson/Kconfig"
7743b8f5030SCarlo Caione
77517723fd3SJonas Jensensource "arch/arm/mach-moxart/Kconfig"
77617723fd3SJonas Jensen
777794d15b2SStanislav Samsonovsource "arch/arm/mach-mv78xx0/Kconfig"
778794d15b2SStanislav Samsonov
7793995eb82SShawn Guosource "arch/arm/mach-imx/Kconfig"
7801da177e4SLinus Torvalds
781f682a218SMatthias Bruggersource "arch/arm/mach-mediatek/Kconfig"
782f682a218SMatthias Brugger
7831d3f33d5SShawn Guosource "arch/arm/mach-mxs/Kconfig"
7841d3f33d5SShawn Guo
78595b8f20fSRussell Kingsource "arch/arm/mach-netx/Kconfig"
78649cbe786SEric Miao
78795b8f20fSRussell Kingsource "arch/arm/mach-nomadik/Kconfig"
78895b8f20fSRussell King
7899851ca57SDaniel Tangsource "arch/arm/mach-nspire/Kconfig"
7909851ca57SDaniel Tang
791d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig"
792d48af15eSTony Lindgren
793d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig"
7941da177e4SLinus Torvalds
7951dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig"
7961dbae815STony Lindgren
7979dd0b194SLennert Buytenheksource "arch/arm/mach-orion5x/Kconfig"
798585cf175STzachi Perelstein
799387798b3SRob Herringsource "arch/arm/mach-picoxcell/Kconfig"
800387798b3SRob Herring
80195b8f20fSRussell Kingsource "arch/arm/mach-pxa/Kconfig"
80295b8f20fSRussell Kingsource "arch/arm/plat-pxa/Kconfig"
8031da177e4SLinus Torvalds
80495b8f20fSRussell Kingsource "arch/arm/mach-mmp/Kconfig"
80595b8f20fSRussell King
8068fc1b0f8SKumar Galasource "arch/arm/mach-qcom/Kconfig"
8078fc1b0f8SKumar Gala
80895b8f20fSRussell Kingsource "arch/arm/mach-realview/Kconfig"
80995b8f20fSRussell King
810d63dc051SHeiko Stuebnersource "arch/arm/mach-rockchip/Kconfig"
811d63dc051SHeiko Stuebner
81295b8f20fSRussell Kingsource "arch/arm/mach-sa1100/Kconfig"
813edabd38eSSaeed Bishara
814387798b3SRob Herringsource "arch/arm/mach-socfpga/Kconfig"
815387798b3SRob Herring
816a7ed099fSArnd Bergmannsource "arch/arm/mach-spear/Kconfig"
817a21765a7SBen Dooks
81865ebcc11SSrinivas Kandagatlasource "arch/arm/mach-sti/Kconfig"
81965ebcc11SSrinivas Kandagatla
82085fd6d63SKukjin Kimsource "arch/arm/mach-s3c24xx/Kconfig"
8211da177e4SLinus Torvalds
822431107eaSBen Dookssource "arch/arm/mach-s3c64xx/Kconfig"
823a08ab637SBen Dooks
824170f4e42SKukjin Kimsource "arch/arm/mach-s5pv210/Kconfig"
825170f4e42SKukjin Kim
82683014579SKukjin Kimsource "arch/arm/mach-exynos/Kconfig"
827e509b289SRob Herringsource "arch/arm/plat-samsung/Kconfig"
828cc0e72b8SChanghwan Youn
829882d01f9SRussell Kingsource "arch/arm/mach-shmobile/Kconfig"
8301da177e4SLinus Torvalds
8313b52634fSMaxime Ripardsource "arch/arm/mach-sunxi/Kconfig"
8323b52634fSMaxime Ripard
833156a0997SBarry Songsource "arch/arm/mach-prima2/Kconfig"
834156a0997SBarry Song
835d6de5b02SMarc Gonzalezsource "arch/arm/mach-tango/Kconfig"
836d6de5b02SMarc Gonzalez
837c5f80065SErik Gillingsource "arch/arm/mach-tegra/Kconfig"
838c5f80065SErik Gilling
83995b8f20fSRussell Kingsource "arch/arm/mach-u300/Kconfig"
8401da177e4SLinus Torvalds
841ba56a987SMasahiro Yamadasource "arch/arm/mach-uniphier/Kconfig"
842ba56a987SMasahiro Yamada
84395b8f20fSRussell Kingsource "arch/arm/mach-ux500/Kconfig"
8441da177e4SLinus Torvalds
8451da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig"
8461da177e4SLinus Torvalds
847ceade897SRussell Kingsource "arch/arm/mach-vexpress/Kconfig"
848420c34e4SRussell Kingsource "arch/arm/plat-versatile/Kconfig"
849ceade897SRussell King
8506f35f9a9STony Prisksource "arch/arm/mach-vt8500/Kconfig"
8516f35f9a9STony Prisk
8527ec80ddfSwanzongshunsource "arch/arm/mach-w90x900/Kconfig"
8537ec80ddfSwanzongshun
854acede515SJun Niesource "arch/arm/mach-zx/Kconfig"
855acede515SJun Nie
8569a45eb69SJosh Cartwrightsource "arch/arm/mach-zynq/Kconfig"
8579a45eb69SJosh Cartwright
858499f1640SStefan Agner# ARMv7-M architecture
859499f1640SStefan Agnerconfig ARCH_EFM32
860499f1640SStefan Agner	bool "Energy Micro efm32"
861499f1640SStefan Agner	depends on ARM_SINGLE_ARMV7M
862499f1640SStefan Agner	select ARCH_REQUIRE_GPIOLIB
863499f1640SStefan Agner	help
864499f1640SStefan Agner	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
865499f1640SStefan Agner	  processors.
866499f1640SStefan Agner
867499f1640SStefan Agnerconfig ARCH_LPC18XX
868499f1640SStefan Agner	bool "NXP LPC18xx/LPC43xx"
869499f1640SStefan Agner	depends on ARM_SINGLE_ARMV7M
870499f1640SStefan Agner	select ARCH_HAS_RESET_CONTROLLER
871499f1640SStefan Agner	select ARM_AMBA
872499f1640SStefan Agner	select CLKSRC_LPC32XX
873499f1640SStefan Agner	select PINCTRL
874499f1640SStefan Agner	help
875499f1640SStefan Agner	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
876499f1640SStefan Agner	  high performance microcontrollers.
877499f1640SStefan Agner
878499f1640SStefan Agnerconfig ARCH_STM32
879499f1640SStefan Agner	bool "STMicrolectronics STM32"
880499f1640SStefan Agner	depends on ARM_SINGLE_ARMV7M
881499f1640SStefan Agner	select ARCH_HAS_RESET_CONTROLLER
882499f1640SStefan Agner	select ARMV7M_SYSTICK
88325263186SMaxime Coquelin	select CLKSRC_STM32
884f64e9804SMaxime Coquelin	select PINCTRL
885499f1640SStefan Agner	select RESET_CONTROLLER
886499f1640SStefan Agner	help
887499f1640SStefan Agner	  Support for STMicroelectronics STM32 processors.
888499f1640SStefan Agner
889fa65fc6bSMaxime Coquelinconfig MACH_STM32F429
890fa65fc6bSMaxime Coquelin	bool "STMicrolectronics STM32F429"
891fa65fc6bSMaxime Coquelin	depends on ARCH_STM32
892fa65fc6bSMaxime Coquelin	default y
893fa65fc6bSMaxime Coquelin
8941da177e4SLinus Torvalds# Definitions to make life easier
8951da177e4SLinus Torvaldsconfig ARCH_ACORN
8961da177e4SLinus Torvalds	bool
8971da177e4SLinus Torvalds
8987ae1f7ecSLennert Buytenhekconfig PLAT_IOP
8997ae1f7ecSLennert Buytenhek	bool
900469d3044SMikael Pettersson	select GENERIC_CLOCKEVENTS
9017ae1f7ecSLennert Buytenhek
90269b02f6aSLennert Buytenhekconfig PLAT_ORION
90369b02f6aSLennert Buytenhek	bool
904bfe45e0bSRussell King	select CLKSRC_MMIO
905b1b3f49cSRussell King	select COMMON_CLK
906dc7ad3b3SRussell King	select GENERIC_IRQ_CHIP
907278b45b0SAndrew Lunn	select IRQ_DOMAIN
90869b02f6aSLennert Buytenhek
909abcda1dcSThomas Petazzoniconfig PLAT_ORION_LEGACY
910abcda1dcSThomas Petazzoni	bool
911abcda1dcSThomas Petazzoni	select PLAT_ORION
912abcda1dcSThomas Petazzoni
913bd5ce433SEric Miaoconfig PLAT_PXA
914bd5ce433SEric Miao	bool
915bd5ce433SEric Miao
916f4b8b319SRussell Kingconfig PLAT_VERSATILE
917f4b8b319SRussell King	bool
918f4b8b319SRussell King
919d9a1beaaSAlexandre Courbotsource "arch/arm/firmware/Kconfig"
920d9a1beaaSAlexandre Courbot
9211da177e4SLinus Torvaldssource arch/arm/mm/Kconfig
9221da177e4SLinus Torvalds
923afe4b25eSLennert Buytenhekconfig IWMMXT
924d93003e8SSebastian Hesselbarth	bool "Enable iWMMXt support"
925d93003e8SSebastian Hesselbarth	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
926d93003e8SSebastian Hesselbarth	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
927afe4b25eSLennert Buytenhek	help
928afe4b25eSLennert Buytenhek	  Enable support for iWMMXt context switching at run time if
929afe4b25eSLennert Buytenhek	  running on a CPU that supports it.
930afe4b25eSLennert Buytenhek
93152108641Seric miaoconfig MULTI_IRQ_HANDLER
93252108641Seric miao	bool
93352108641Seric miao	help
93452108641Seric miao	  Allow each machine to specify it's own IRQ handler at run time.
93552108641Seric miao
9363b93e7b0SHyok S. Choiif !MMU
9373b93e7b0SHyok S. Choisource "arch/arm/Kconfig-nommu"
9383b93e7b0SHyok S. Choiendif
9393b93e7b0SHyok S. Choi
9403e0a07f8SGregory CLEMENTconfig PJ4B_ERRATA_4742
9413e0a07f8SGregory CLEMENT	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
9423e0a07f8SGregory CLEMENT	depends on CPU_PJ4B && MACH_ARMADA_370
9433e0a07f8SGregory CLEMENT	default y
9443e0a07f8SGregory CLEMENT	help
9453e0a07f8SGregory CLEMENT	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
9463e0a07f8SGregory CLEMENT	  Event (WFE) IDLE states, a specific timing sensitivity exists between
9473e0a07f8SGregory CLEMENT	  the retiring WFI/WFE instructions and the newly issued subsequent
9483e0a07f8SGregory CLEMENT	  instructions.  This sensitivity can result in a CPU hang scenario.
9493e0a07f8SGregory CLEMENT	  Workaround:
9503e0a07f8SGregory CLEMENT	  The software must insert either a Data Synchronization Barrier (DSB)
9513e0a07f8SGregory CLEMENT	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
9523e0a07f8SGregory CLEMENT	  instruction
9533e0a07f8SGregory CLEMENT
954f0c4b8d6SWill Deaconconfig ARM_ERRATA_326103
955f0c4b8d6SWill Deacon	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
956f0c4b8d6SWill Deacon	depends on CPU_V6
957f0c4b8d6SWill Deacon	help
958f0c4b8d6SWill Deacon	  Executing a SWP instruction to read-only memory does not set bit 11
959f0c4b8d6SWill Deacon	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
960f0c4b8d6SWill Deacon	  treat the access as a read, preventing a COW from occurring and
961f0c4b8d6SWill Deacon	  causing the faulting task to livelock.
962f0c4b8d6SWill Deacon
9639cba3cccSCatalin Marinasconfig ARM_ERRATA_411920
9649cba3cccSCatalin Marinas	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
965e399b1a4SRussell King	depends on CPU_V6 || CPU_V6K
9669cba3cccSCatalin Marinas	help
9679cba3cccSCatalin Marinas	  Invalidation of the Instruction Cache operation can
9689cba3cccSCatalin Marinas	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
9699cba3cccSCatalin Marinas	  It does not affect the MPCore. This option enables the ARM Ltd.
9709cba3cccSCatalin Marinas	  recommended workaround.
9719cba3cccSCatalin Marinas
9727ce236fcSCatalin Marinasconfig ARM_ERRATA_430973
9737ce236fcSCatalin Marinas	bool "ARM errata: Stale prediction on replaced interworking branch"
9747ce236fcSCatalin Marinas	depends on CPU_V7
9757ce236fcSCatalin Marinas	help
9767ce236fcSCatalin Marinas	  This option enables the workaround for the 430973 Cortex-A8
97779403cdaSRussell King	  r1p* erratum. If a code sequence containing an ARM/Thumb
9787ce236fcSCatalin Marinas	  interworking branch is replaced with another code sequence at the
9797ce236fcSCatalin Marinas	  same virtual address, whether due to self-modifying code or virtual
9807ce236fcSCatalin Marinas	  to physical address re-mapping, Cortex-A8 does not recover from the
9817ce236fcSCatalin Marinas	  stale interworking branch prediction. This results in Cortex-A8
9827ce236fcSCatalin Marinas	  executing the new code sequence in the incorrect ARM or Thumb state.
9837ce236fcSCatalin Marinas	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
9847ce236fcSCatalin Marinas	  and also flushes the branch target cache at every context switch.
9857ce236fcSCatalin Marinas	  Note that setting specific bits in the ACTLR register may not be
9867ce236fcSCatalin Marinas	  available in non-secure mode.
9877ce236fcSCatalin Marinas
988855c551fSCatalin Marinasconfig ARM_ERRATA_458693
989855c551fSCatalin Marinas	bool "ARM errata: Processor deadlock when a false hazard is created"
990855c551fSCatalin Marinas	depends on CPU_V7
99162e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
992855c551fSCatalin Marinas	help
993855c551fSCatalin Marinas	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
994855c551fSCatalin Marinas	  erratum. For very specific sequences of memory operations, it is
995855c551fSCatalin Marinas	  possible for a hazard condition intended for a cache line to instead
996855c551fSCatalin Marinas	  be incorrectly associated with a different cache line. This false
997855c551fSCatalin Marinas	  hazard might then cause a processor deadlock. The workaround enables
998855c551fSCatalin Marinas	  the L1 caching of the NEON accesses and disables the PLD instruction
999855c551fSCatalin Marinas	  in the ACTLR register. Note that setting specific bits in the ACTLR
1000855c551fSCatalin Marinas	  register may not be available in non-secure mode.
1001855c551fSCatalin Marinas
10020516e464SCatalin Marinasconfig ARM_ERRATA_460075
10030516e464SCatalin Marinas	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
10040516e464SCatalin Marinas	depends on CPU_V7
100562e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
10060516e464SCatalin Marinas	help
10070516e464SCatalin Marinas	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
10080516e464SCatalin Marinas	  erratum. Any asynchronous access to the L2 cache may encounter a
10090516e464SCatalin Marinas	  situation in which recent store transactions to the L2 cache are lost
10100516e464SCatalin Marinas	  and overwritten with stale memory contents from external memory. The
10110516e464SCatalin Marinas	  workaround disables the write-allocate mode for the L2 cache via the
10120516e464SCatalin Marinas	  ACTLR register. Note that setting specific bits in the ACTLR register
10130516e464SCatalin Marinas	  may not be available in non-secure mode.
10140516e464SCatalin Marinas
10159f05027cSWill Deaconconfig ARM_ERRATA_742230
10169f05027cSWill Deacon	bool "ARM errata: DMB operation may be faulty"
10179f05027cSWill Deacon	depends on CPU_V7 && SMP
101862e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
10199f05027cSWill Deacon	help
10209f05027cSWill Deacon	  This option enables the workaround for the 742230 Cortex-A9
10219f05027cSWill Deacon	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
10229f05027cSWill Deacon	  between two write operations may not ensure the correct visibility
10239f05027cSWill Deacon	  ordering of the two writes. This workaround sets a specific bit in
10249f05027cSWill Deacon	  the diagnostic register of the Cortex-A9 which causes the DMB
10259f05027cSWill Deacon	  instruction to behave as a DSB, ensuring the correct behaviour of
10269f05027cSWill Deacon	  the two writes.
10279f05027cSWill Deacon
1028a672e99bSWill Deaconconfig ARM_ERRATA_742231
1029a672e99bSWill Deacon	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1030a672e99bSWill Deacon	depends on CPU_V7 && SMP
103162e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1032a672e99bSWill Deacon	help
1033a672e99bSWill Deacon	  This option enables the workaround for the 742231 Cortex-A9
1034a672e99bSWill Deacon	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
1035a672e99bSWill Deacon	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1036a672e99bSWill Deacon	  accessing some data located in the same cache line, may get corrupted
1037a672e99bSWill Deacon	  data due to bad handling of the address hazard when the line gets
1038a672e99bSWill Deacon	  replaced from one of the CPUs at the same time as another CPU is
1039a672e99bSWill Deacon	  accessing it. This workaround sets specific bits in the diagnostic
1040a672e99bSWill Deacon	  register of the Cortex-A9 which reduces the linefill issuing
1041a672e99bSWill Deacon	  capabilities of the processor.
1042a672e99bSWill Deacon
104369155794SJon Medhurstconfig ARM_ERRATA_643719
104469155794SJon Medhurst	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
104569155794SJon Medhurst	depends on CPU_V7 && SMP
1046e5a5de44SRussell King	default y
104769155794SJon Medhurst	help
104869155794SJon Medhurst	  This option enables the workaround for the 643719 Cortex-A9 (prior to
104969155794SJon Medhurst	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
105069155794SJon Medhurst	  register returns zero when it should return one. The workaround
105169155794SJon Medhurst	  corrects this value, ensuring cache maintenance operations which use
105269155794SJon Medhurst	  it behave as intended and avoiding data corruption.
105369155794SJon Medhurst
1054cdf357f1SWill Deaconconfig ARM_ERRATA_720789
1055cdf357f1SWill Deacon	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1056e66dc745SDave Martin	depends on CPU_V7
1057cdf357f1SWill Deacon	help
1058cdf357f1SWill Deacon	  This option enables the workaround for the 720789 Cortex-A9 (prior to
1059cdf357f1SWill Deacon	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1060cdf357f1SWill Deacon	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1061cdf357f1SWill Deacon	  As a consequence of this erratum, some TLB entries which should be
1062cdf357f1SWill Deacon	  invalidated are not, resulting in an incoherency in the system page
1063cdf357f1SWill Deacon	  tables. The workaround changes the TLB flushing routines to invalidate
1064cdf357f1SWill Deacon	  entries regardless of the ASID.
1065475d92fcSWill Deacon
1066475d92fcSWill Deaconconfig ARM_ERRATA_743622
1067475d92fcSWill Deacon	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1068475d92fcSWill Deacon	depends on CPU_V7
106962e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1070475d92fcSWill Deacon	help
1071475d92fcSWill Deacon	  This option enables the workaround for the 743622 Cortex-A9
1072efbc74acSWill Deacon	  (r2p*) erratum. Under very rare conditions, a faulty
1073475d92fcSWill Deacon	  optimisation in the Cortex-A9 Store Buffer may lead to data
1074475d92fcSWill Deacon	  corruption. This workaround sets a specific bit in the diagnostic
1075475d92fcSWill Deacon	  register of the Cortex-A9 which disables the Store Buffer
1076475d92fcSWill Deacon	  optimisation, preventing the defect from occurring. This has no
1077475d92fcSWill Deacon	  visible impact on the overall performance or power consumption of the
1078475d92fcSWill Deacon	  processor.
1079475d92fcSWill Deacon
10809a27c27cSWill Deaconconfig ARM_ERRATA_751472
10819a27c27cSWill Deacon	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1082ba90c516SDave Martin	depends on CPU_V7
108362e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
10849a27c27cSWill Deacon	help
10859a27c27cSWill Deacon	  This option enables the workaround for the 751472 Cortex-A9 (prior
10869a27c27cSWill Deacon	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
10879a27c27cSWill Deacon	  completion of a following broadcasted operation if the second
10889a27c27cSWill Deacon	  operation is received by a CPU before the ICIALLUIS has completed,
10899a27c27cSWill Deacon	  potentially leading to corrupted entries in the cache or TLB.
10909a27c27cSWill Deacon
1091fcbdc5feSWill Deaconconfig ARM_ERRATA_754322
1092fcbdc5feSWill Deacon	bool "ARM errata: possible faulty MMU translations following an ASID switch"
1093fcbdc5feSWill Deacon	depends on CPU_V7
1094fcbdc5feSWill Deacon	help
1095fcbdc5feSWill Deacon	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1096fcbdc5feSWill Deacon	  r3p*) erratum. A speculative memory access may cause a page table walk
1097fcbdc5feSWill Deacon	  which starts prior to an ASID switch but completes afterwards. This
1098fcbdc5feSWill Deacon	  can populate the micro-TLB with a stale entry which may be hit with
1099fcbdc5feSWill Deacon	  the new ASID. This workaround places two dsb instructions in the mm
1100fcbdc5feSWill Deacon	  switching code so that no page table walks can cross the ASID switch.
1101fcbdc5feSWill Deacon
11025dab26afSWill Deaconconfig ARM_ERRATA_754327
11035dab26afSWill Deacon	bool "ARM errata: no automatic Store Buffer drain"
11045dab26afSWill Deacon	depends on CPU_V7 && SMP
11055dab26afSWill Deacon	help
11065dab26afSWill Deacon	  This option enables the workaround for the 754327 Cortex-A9 (prior to
11075dab26afSWill Deacon	  r2p0) erratum. The Store Buffer does not have any automatic draining
11085dab26afSWill Deacon	  mechanism and therefore a livelock may occur if an external agent
11095dab26afSWill Deacon	  continuously polls a memory location waiting to observe an update.
11105dab26afSWill Deacon	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
11115dab26afSWill Deacon	  written polling loops from denying visibility of updates to memory.
11125dab26afSWill Deacon
1113145e10e1SCatalin Marinasconfig ARM_ERRATA_364296
1114145e10e1SCatalin Marinas	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1115fd832478SFabio Estevam	depends on CPU_V6
1116145e10e1SCatalin Marinas	help
1117145e10e1SCatalin Marinas	  This options enables the workaround for the 364296 ARM1136
1118145e10e1SCatalin Marinas	  r0p2 erratum (possible cache data corruption with
1119145e10e1SCatalin Marinas	  hit-under-miss enabled). It sets the undocumented bit 31 in
1120145e10e1SCatalin Marinas	  the auxiliary control register and the FI bit in the control
1121145e10e1SCatalin Marinas	  register, thus disabling hit-under-miss without putting the
1122145e10e1SCatalin Marinas	  processor into full low interrupt latency mode. ARM11MPCore
1123145e10e1SCatalin Marinas	  is not affected.
1124145e10e1SCatalin Marinas
1125f630c1bdSWill Deaconconfig ARM_ERRATA_764369
1126f630c1bdSWill Deacon	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1127f630c1bdSWill Deacon	depends on CPU_V7 && SMP
1128f630c1bdSWill Deacon	help
1129f630c1bdSWill Deacon	  This option enables the workaround for erratum 764369
1130f630c1bdSWill Deacon	  affecting Cortex-A9 MPCore with two or more processors (all
1131f630c1bdSWill Deacon	  current revisions). Under certain timing circumstances, a data
1132f630c1bdSWill Deacon	  cache line maintenance operation by MVA targeting an Inner
1133f630c1bdSWill Deacon	  Shareable memory region may fail to proceed up to either the
1134f630c1bdSWill Deacon	  Point of Coherency or to the Point of Unification of the
1135f630c1bdSWill Deacon	  system. This workaround adds a DSB instruction before the
1136f630c1bdSWill Deacon	  relevant cache maintenance functions and sets a specific bit
1137f630c1bdSWill Deacon	  in the diagnostic control register of the SCU.
1138f630c1bdSWill Deacon
11397253b85cSSimon Hormanconfig ARM_ERRATA_775420
11407253b85cSSimon Horman       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
11417253b85cSSimon Horman       depends on CPU_V7
11427253b85cSSimon Horman       help
11437253b85cSSimon Horman	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
11447253b85cSSimon Horman	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
11457253b85cSSimon Horman	 operation aborts with MMU exception, it might cause the processor
11467253b85cSSimon Horman	 to deadlock. This workaround puts DSB before executing ISB if
11477253b85cSSimon Horman	 an abort may occur on cache maintenance.
11487253b85cSSimon Horman
114993dc6887SCatalin Marinasconfig ARM_ERRATA_798181
115093dc6887SCatalin Marinas	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
115193dc6887SCatalin Marinas	depends on CPU_V7 && SMP
115293dc6887SCatalin Marinas	help
115393dc6887SCatalin Marinas	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
115493dc6887SCatalin Marinas	  adequately shooting down all use of the old entries. This
115593dc6887SCatalin Marinas	  option enables the Linux kernel workaround for this erratum
115693dc6887SCatalin Marinas	  which sends an IPI to the CPUs that are running the same ASID
115793dc6887SCatalin Marinas	  as the one being invalidated.
115893dc6887SCatalin Marinas
115984b6504fSWill Deaconconfig ARM_ERRATA_773022
116084b6504fSWill Deacon	bool "ARM errata: incorrect instructions may be executed from loop buffer"
116184b6504fSWill Deacon	depends on CPU_V7
116284b6504fSWill Deacon	help
116384b6504fSWill Deacon	  This option enables the workaround for the 773022 Cortex-A15
116484b6504fSWill Deacon	  (up to r0p4) erratum. In certain rare sequences of code, the
116584b6504fSWill Deacon	  loop buffer may deliver incorrect instructions. This
116684b6504fSWill Deacon	  workaround disables the loop buffer to avoid the erratum.
116784b6504fSWill Deacon
11681da177e4SLinus Torvaldsendmenu
11691da177e4SLinus Torvalds
11701da177e4SLinus Torvaldssource "arch/arm/common/Kconfig"
11711da177e4SLinus Torvalds
11721da177e4SLinus Torvaldsmenu "Bus support"
11731da177e4SLinus Torvalds
11741da177e4SLinus Torvaldsconfig ISA
11751da177e4SLinus Torvalds	bool
11761da177e4SLinus Torvalds	help
11771da177e4SLinus Torvalds	  Find out whether you have ISA slots on your motherboard.  ISA is the
11781da177e4SLinus Torvalds	  name of a bus system, i.e. the way the CPU talks to the other stuff
11791da177e4SLinus Torvalds	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
11801da177e4SLinus Torvalds	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
11811da177e4SLinus Torvalds	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
11821da177e4SLinus Torvalds
1183065909b9SRussell King# Select ISA DMA controller support
11841da177e4SLinus Torvaldsconfig ISA_DMA
11851da177e4SLinus Torvalds	bool
1186065909b9SRussell King	select ISA_DMA_API
11871da177e4SLinus Torvalds
1188065909b9SRussell King# Select ISA DMA interface
11895cae841bSAl Viroconfig ISA_DMA_API
11905cae841bSAl Viro	bool
11915cae841bSAl Viro
11921da177e4SLinus Torvaldsconfig PCI
11930b05da72SHans Ulli Kroll	bool "PCI support" if MIGHT_HAVE_PCI
11941da177e4SLinus Torvalds	help
11951da177e4SLinus Torvalds	  Find out whether you have a PCI motherboard. PCI is the name of a
11961da177e4SLinus Torvalds	  bus system, i.e. the way the CPU talks to the other stuff inside
11971da177e4SLinus Torvalds	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
11981da177e4SLinus Torvalds	  VESA. If you have PCI, say Y, otherwise N.
11991da177e4SLinus Torvalds
120052882173SAnton Vorontsovconfig PCI_DOMAINS
120152882173SAnton Vorontsov	bool
120252882173SAnton Vorontsov	depends on PCI
120352882173SAnton Vorontsov
12048c7d1474SLorenzo Pieralisiconfig PCI_DOMAINS_GENERIC
12058c7d1474SLorenzo Pieralisi	def_bool PCI_DOMAINS
12068c7d1474SLorenzo Pieralisi
1207b080ac8aSMarcelo Roberto Jimenezconfig PCI_NANOENGINE
1208b080ac8aSMarcelo Roberto Jimenez	bool "BSE nanoEngine PCI support"
1209b080ac8aSMarcelo Roberto Jimenez	depends on SA1100_NANOENGINE
1210b080ac8aSMarcelo Roberto Jimenez	help
1211b080ac8aSMarcelo Roberto Jimenez	  Enable PCI on the BSE nanoEngine board.
1212b080ac8aSMarcelo Roberto Jimenez
121336e23590SMatthew Wilcoxconfig PCI_SYSCALL
121436e23590SMatthew Wilcox	def_bool PCI
121536e23590SMatthew Wilcox
1216a0113a99SMike Rapoportconfig PCI_HOST_ITE8152
1217a0113a99SMike Rapoport	bool
1218a0113a99SMike Rapoport	depends on PCI && MACH_ARMCORE
1219a0113a99SMike Rapoport	default y
1220a0113a99SMike Rapoport	select DMABOUNCE
1221a0113a99SMike Rapoport
12221da177e4SLinus Torvaldssource "drivers/pci/Kconfig"
12233f06d157SJingoo Hansource "drivers/pci/pcie/Kconfig"
12241da177e4SLinus Torvalds
12251da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig"
12261da177e4SLinus Torvalds
12271da177e4SLinus Torvaldsendmenu
12281da177e4SLinus Torvalds
12291da177e4SLinus Torvaldsmenu "Kernel Features"
12301da177e4SLinus Torvalds
12313b55658aSDave Martinconfig HAVE_SMP
12323b55658aSDave Martin	bool
12333b55658aSDave Martin	help
12343b55658aSDave Martin	  This option should be selected by machines which have an SMP-
12353b55658aSDave Martin	  capable CPU.
12363b55658aSDave Martin
12373b55658aSDave Martin	  The only effect of this option is to make the SMP-related
12383b55658aSDave Martin	  options available to the user for configuration.
12393b55658aSDave Martin
12401da177e4SLinus Torvaldsconfig SMP
1241bb2d8130SRussell King	bool "Symmetric Multi-Processing"
1242fbb4ddacSRussell King	depends on CPU_V6K || CPU_V7
1243bc28248eSRussell King	depends on GENERIC_CLOCKEVENTS
12443b55658aSDave Martin	depends on HAVE_SMP
1245801bb21cSJonathan Austin	depends on MMU || ARM_MPU
12460361748fSArnd Bergmann	select IRQ_WORK
12471da177e4SLinus Torvalds	help
12481da177e4SLinus Torvalds	  This enables support for systems with more than one CPU. If you have
12494a474157SRobert Graffham	  a system with only one CPU, say N. If you have a system with more
12504a474157SRobert Graffham	  than one CPU, say Y.
12511da177e4SLinus Torvalds
12524a474157SRobert Graffham	  If you say N here, the kernel will run on uni- and multiprocessor
12531da177e4SLinus Torvalds	  machines, but will use only one CPU of a multiprocessor machine. If
12544a474157SRobert Graffham	  you say Y here, the kernel will run on many, but not all,
12554a474157SRobert Graffham	  uniprocessor machines. On a uniprocessor machine, the kernel
12564a474157SRobert Graffham	  will run faster if you say N here.
12571da177e4SLinus Torvalds
1258395cf969SPaul Bolle	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
12591da177e4SLinus Torvalds	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
126050a23e6eSJustin P. Mattock	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
12611da177e4SLinus Torvalds
12621da177e4SLinus Torvalds	  If you don't know what to do here, say N.
12631da177e4SLinus Torvalds
1264f00ec48fSRussell Kingconfig SMP_ON_UP
12655744ff43SRussell King	bool "Allow booting SMP kernel on uniprocessor systems"
1266801bb21cSJonathan Austin	depends on SMP && !XIP_KERNEL && MMU
1267f00ec48fSRussell King	default y
1268f00ec48fSRussell King	help
1269f00ec48fSRussell King	  SMP kernels contain instructions which fail on non-SMP processors.
1270f00ec48fSRussell King	  Enabling this option allows the kernel to modify itself to make
1271f00ec48fSRussell King	  these instructions safe.  Disabling it allows about 1K of space
1272f00ec48fSRussell King	  savings.
1273f00ec48fSRussell King
1274f00ec48fSRussell King	  If you don't know what to do here, say Y.
1275f00ec48fSRussell King
1276c9018aabSVincent Guittotconfig ARM_CPU_TOPOLOGY
1277c9018aabSVincent Guittot	bool "Support cpu topology definition"
1278c9018aabSVincent Guittot	depends on SMP && CPU_V7
1279c9018aabSVincent Guittot	default y
1280c9018aabSVincent Guittot	help
1281c9018aabSVincent Guittot	  Support ARM cpu topology definition. The MPIDR register defines
1282c9018aabSVincent Guittot	  affinity between processors which is then used to describe the cpu
1283c9018aabSVincent Guittot	  topology of an ARM System.
1284c9018aabSVincent Guittot
1285c9018aabSVincent Guittotconfig SCHED_MC
1286c9018aabSVincent Guittot	bool "Multi-core scheduler support"
1287c9018aabSVincent Guittot	depends on ARM_CPU_TOPOLOGY
1288c9018aabSVincent Guittot	help
1289c9018aabSVincent Guittot	  Multi-core scheduler support improves the CPU scheduler's decision
1290c9018aabSVincent Guittot	  making when dealing with multi-core CPU chips at a cost of slightly
1291c9018aabSVincent Guittot	  increased overhead in some places. If unsure say N here.
1292c9018aabSVincent Guittot
1293c9018aabSVincent Guittotconfig SCHED_SMT
1294c9018aabSVincent Guittot	bool "SMT scheduler support"
1295c9018aabSVincent Guittot	depends on ARM_CPU_TOPOLOGY
1296c9018aabSVincent Guittot	help
1297c9018aabSVincent Guittot	  Improves the CPU scheduler's decision making when dealing with
1298c9018aabSVincent Guittot	  MultiThreading at a cost of slightly increased overhead in some
1299c9018aabSVincent Guittot	  places. If unsure say N here.
1300c9018aabSVincent Guittot
1301a8cbcd92SRussell Kingconfig HAVE_ARM_SCU
1302a8cbcd92SRussell King	bool
1303a8cbcd92SRussell King	help
1304a8cbcd92SRussell King	  This option enables support for the ARM system coherency unit
1305a8cbcd92SRussell King
13068a4da6e3SMark Rutlandconfig HAVE_ARM_ARCH_TIMER
1307022c03a2SMarc Zyngier	bool "Architected timer support"
1308022c03a2SMarc Zyngier	depends on CPU_V7
13098a4da6e3SMark Rutland	select ARM_ARCH_TIMER
13100c403462SWill Deacon	select GENERIC_CLOCKEVENTS
1311022c03a2SMarc Zyngier	help
1312022c03a2SMarc Zyngier	  This option enables support for the ARM architected timer
1313022c03a2SMarc Zyngier
1314f32f4ce2SRussell Kingconfig HAVE_ARM_TWD
1315f32f4ce2SRussell King	bool
1316da4a686aSRob Herring	select CLKSRC_OF if OF
1317f32f4ce2SRussell King	help
1318f32f4ce2SRussell King	  This options enables support for the ARM timer and watchdog unit
1319f32f4ce2SRussell King
1320e8db288eSNicolas Pitreconfig MCPM
1321e8db288eSNicolas Pitre	bool "Multi-Cluster Power Management"
1322e8db288eSNicolas Pitre	depends on CPU_V7 && SMP
1323e8db288eSNicolas Pitre	help
1324e8db288eSNicolas Pitre	  This option provides the common power management infrastructure
1325e8db288eSNicolas Pitre	  for (multi-)cluster based systems, such as big.LITTLE based
1326e8db288eSNicolas Pitre	  systems.
1327e8db288eSNicolas Pitre
1328ebf4a5c5SHaojian Zhuangconfig MCPM_QUAD_CLUSTER
1329ebf4a5c5SHaojian Zhuang	bool
1330ebf4a5c5SHaojian Zhuang	depends on MCPM
1331ebf4a5c5SHaojian Zhuang	help
1332ebf4a5c5SHaojian Zhuang	  To avoid wasting resources unnecessarily, MCPM only supports up
1333ebf4a5c5SHaojian Zhuang	  to 2 clusters by default.
1334ebf4a5c5SHaojian Zhuang	  Platforms with 3 or 4 clusters that use MCPM must select this
1335ebf4a5c5SHaojian Zhuang	  option to allow the additional clusters to be managed.
1336ebf4a5c5SHaojian Zhuang
13371c33be57SNicolas Pitreconfig BIG_LITTLE
13381c33be57SNicolas Pitre	bool "big.LITTLE support (Experimental)"
13391c33be57SNicolas Pitre	depends on CPU_V7 && SMP
13401c33be57SNicolas Pitre	select MCPM
13411c33be57SNicolas Pitre	help
13421c33be57SNicolas Pitre	  This option enables support selections for the big.LITTLE
13431c33be57SNicolas Pitre	  system architecture.
13441c33be57SNicolas Pitre
13451c33be57SNicolas Pitreconfig BL_SWITCHER
13461c33be57SNicolas Pitre	bool "big.LITTLE switcher support"
13476c044fecSArnd Bergmann	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
13481c33be57SNicolas Pitre	select ARM_CPU_SUSPEND
134951aaf81fSRussell King	select CPU_PM
13501c33be57SNicolas Pitre	help
13511c33be57SNicolas Pitre	  The big.LITTLE "switcher" provides the core functionality to
13521c33be57SNicolas Pitre	  transparently handle transition between a cluster of A15's
13531c33be57SNicolas Pitre	  and a cluster of A7's in a big.LITTLE system.
13541c33be57SNicolas Pitre
1355b22537c6SNicolas Pitreconfig BL_SWITCHER_DUMMY_IF
1356b22537c6SNicolas Pitre	tristate "Simple big.LITTLE switcher user interface"
1357b22537c6SNicolas Pitre	depends on BL_SWITCHER && DEBUG_KERNEL
1358b22537c6SNicolas Pitre	help
1359b22537c6SNicolas Pitre	  This is a simple and dummy char dev interface to control
1360b22537c6SNicolas Pitre	  the big.LITTLE switcher core code.  It is meant for
1361b22537c6SNicolas Pitre	  debugging purposes only.
1362b22537c6SNicolas Pitre
13638d5796d2SLennert Buytenhekchoice
13648d5796d2SLennert Buytenhek	prompt "Memory split"
1365006fa259SRussell King	depends on MMU
13668d5796d2SLennert Buytenhek	default VMSPLIT_3G
13678d5796d2SLennert Buytenhek	help
13688d5796d2SLennert Buytenhek	  Select the desired split between kernel and user memory.
13698d5796d2SLennert Buytenhek
13708d5796d2SLennert Buytenhek	  If you are not absolutely sure what you are doing, leave this
13718d5796d2SLennert Buytenhek	  option alone!
13728d5796d2SLennert Buytenhek
13738d5796d2SLennert Buytenhek	config VMSPLIT_3G
13748d5796d2SLennert Buytenhek		bool "3G/1G user/kernel split"
137563ce446cSNicolas Pitre	config VMSPLIT_3G_OPT
137663ce446cSNicolas Pitre		bool "3G/1G user/kernel split (for full 1G low memory)"
13778d5796d2SLennert Buytenhek	config VMSPLIT_2G
13788d5796d2SLennert Buytenhek		bool "2G/2G user/kernel split"
13798d5796d2SLennert Buytenhek	config VMSPLIT_1G
13808d5796d2SLennert Buytenhek		bool "1G/3G user/kernel split"
13818d5796d2SLennert Buytenhekendchoice
13828d5796d2SLennert Buytenhek
13838d5796d2SLennert Buytenhekconfig PAGE_OFFSET
13848d5796d2SLennert Buytenhek	hex
1385006fa259SRussell King	default PHYS_OFFSET if !MMU
13868d5796d2SLennert Buytenhek	default 0x40000000 if VMSPLIT_1G
13878d5796d2SLennert Buytenhek	default 0x80000000 if VMSPLIT_2G
138863ce446cSNicolas Pitre	default 0xB0000000 if VMSPLIT_3G_OPT
13898d5796d2SLennert Buytenhek	default 0xC0000000
13908d5796d2SLennert Buytenhek
13911da177e4SLinus Torvaldsconfig NR_CPUS
13921da177e4SLinus Torvalds	int "Maximum number of CPUs (2-32)"
13931da177e4SLinus Torvalds	range 2 32
13941da177e4SLinus Torvalds	depends on SMP
13951da177e4SLinus Torvalds	default "4"
13961da177e4SLinus Torvalds
1397a054a811SRussell Kingconfig HOTPLUG_CPU
139800b7dedeSRussell King	bool "Support for hot-pluggable CPUs"
139940b31360SStephen Rothwell	depends on SMP
1400a054a811SRussell King	help
1401a054a811SRussell King	  Say Y here to experiment with turning CPUs off and on.  CPUs
1402a054a811SRussell King	  can be controlled through /sys/devices/system/cpu.
1403a054a811SRussell King
14042bdd424fSWill Deaconconfig ARM_PSCI
14052bdd424fSWill Deacon	bool "Support for the ARM Power State Coordination Interface (PSCI)"
1406e679660dSJens Wiklander	depends on HAVE_ARM_SMCCC
1407be120397SMark Rutland	select ARM_PSCI_FW
14082bdd424fSWill Deacon	help
14092bdd424fSWill Deacon	  Say Y here if you want Linux to communicate with system firmware
14102bdd424fSWill Deacon	  implementing the PSCI specification for CPU-centric power
14112bdd424fSWill Deacon	  management operations described in ARM document number ARM DEN
14122bdd424fSWill Deacon	  0022A ("Power State Coordination Interface System Software on
14132bdd424fSWill Deacon	  ARM processors").
14142bdd424fSWill Deacon
14152a6ad871SMaxime Ripard# The GPIO number here must be sorted by descending number. In case of
14162a6ad871SMaxime Ripard# a multiplatform kernel, we just want the highest value required by the
14172a6ad871SMaxime Ripard# selected platforms.
141844986ab0SPeter De Schrijver (NVIDIA)config ARCH_NR_GPIO
141944986ab0SPeter De Schrijver (NVIDIA)	int
1420b35d2e56SGregory Fong	default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1421b35d2e56SGregory Fong		ARCH_ZYNQ
1422aa42587aSTomasz Figa	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1423aa42587aSTomasz Figa		SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
1424eb171a99SBoris BREZILLON	default 416 if ARCH_SUNXI
142506b851e5SOlof Johansson	default 392 if ARCH_U8500
142601bb914cSTony Prisk	default 352 if ARCH_VT8500
14277b5da4c3SHeiko Stuebner	default 288 if ARCH_ROCKCHIP
14282a6ad871SMaxime Ripard	default 264 if MACH_H4700
142944986ab0SPeter De Schrijver (NVIDIA)	default 0
143044986ab0SPeter De Schrijver (NVIDIA)	help
143144986ab0SPeter De Schrijver (NVIDIA)	  Maximum number of GPIOs in the system.
143244986ab0SPeter De Schrijver (NVIDIA)
143344986ab0SPeter De Schrijver (NVIDIA)	  If unsure, leave the default value.
143444986ab0SPeter De Schrijver (NVIDIA)
1435d45a398fSUwe Kleine-Königsource kernel/Kconfig.preempt
14361da177e4SLinus Torvalds
1437c9218b16SRussell Kingconfig HZ_FIXED
1438f8065813SRussell King	int
1439070b8b43SKukjin Kim	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
1440a73ddc61SKukjin Kim		ARCH_S5PV210 || ARCH_EXYNOS4
14411164f672SAlexandre Belloni	default 128 if SOC_AT91RM9200
144247d84682SRussell King	default 0
1443c9218b16SRussell King
1444c9218b16SRussell Kingchoice
144547d84682SRussell King	depends on HZ_FIXED = 0
1446c9218b16SRussell King	prompt "Timer frequency"
1447c9218b16SRussell King
1448c9218b16SRussell Kingconfig HZ_100
1449c9218b16SRussell King	bool "100 Hz"
1450c9218b16SRussell King
1451c9218b16SRussell Kingconfig HZ_200
1452c9218b16SRussell King	bool "200 Hz"
1453c9218b16SRussell King
1454c9218b16SRussell Kingconfig HZ_250
1455c9218b16SRussell King	bool "250 Hz"
1456c9218b16SRussell King
1457c9218b16SRussell Kingconfig HZ_300
1458c9218b16SRussell King	bool "300 Hz"
1459c9218b16SRussell King
1460c9218b16SRussell Kingconfig HZ_500
1461c9218b16SRussell King	bool "500 Hz"
1462c9218b16SRussell King
1463c9218b16SRussell Kingconfig HZ_1000
1464c9218b16SRussell King	bool "1000 Hz"
1465c9218b16SRussell King
1466c9218b16SRussell Kingendchoice
1467c9218b16SRussell King
1468c9218b16SRussell Kingconfig HZ
1469c9218b16SRussell King	int
147047d84682SRussell King	default HZ_FIXED if HZ_FIXED != 0
1471c9218b16SRussell King	default 100 if HZ_100
1472c9218b16SRussell King	default 200 if HZ_200
1473c9218b16SRussell King	default 250 if HZ_250
1474c9218b16SRussell King	default 300 if HZ_300
1475c9218b16SRussell King	default 500 if HZ_500
1476c9218b16SRussell King	default 1000
1477c9218b16SRussell King
1478c9218b16SRussell Kingconfig SCHED_HRTICK
1479c9218b16SRussell King	def_bool HIGH_RES_TIMERS
1480f8065813SRussell King
148116c79651SCatalin Marinasconfig THUMB2_KERNEL
1482bc7dea00SUwe Kleine-König	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
14834477ca45SUwe Kleine-König	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1484bc7dea00SUwe Kleine-König	default y if CPU_THUMBONLY
148516c79651SCatalin Marinas	select AEABI
148616c79651SCatalin Marinas	select ARM_ASM_UNIFIED
148789bace65SArnd Bergmann	select ARM_UNWIND
148816c79651SCatalin Marinas	help
148916c79651SCatalin Marinas	  By enabling this option, the kernel will be compiled in
149016c79651SCatalin Marinas	  Thumb-2 mode. A compiler/assembler that understand the unified
149116c79651SCatalin Marinas	  ARM-Thumb syntax is needed.
149216c79651SCatalin Marinas
149316c79651SCatalin Marinas	  If unsure, say N.
149416c79651SCatalin Marinas
14956f685c5cSDave Martinconfig THUMB2_AVOID_R_ARM_THM_JUMP11
14966f685c5cSDave Martin	bool "Work around buggy Thumb-2 short branch relocations in gas"
14976f685c5cSDave Martin	depends on THUMB2_KERNEL && MODULES
14986f685c5cSDave Martin	default y
14996f685c5cSDave Martin	help
15006f685c5cSDave Martin	  Various binutils versions can resolve Thumb-2 branches to
15016f685c5cSDave Martin	  locally-defined, preemptible global symbols as short-range "b.n"
15026f685c5cSDave Martin	  branch instructions.
15036f685c5cSDave Martin
15046f685c5cSDave Martin	  This is a problem, because there's no guarantee the final
15056f685c5cSDave Martin	  destination of the symbol, or any candidate locations for a
15066f685c5cSDave Martin	  trampoline, are within range of the branch.  For this reason, the
15076f685c5cSDave Martin	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
15086f685c5cSDave Martin	  relocation in modules at all, and it makes little sense to add
15096f685c5cSDave Martin	  support.
15106f685c5cSDave Martin
15116f685c5cSDave Martin	  The symptom is that the kernel fails with an "unsupported
15126f685c5cSDave Martin	  relocation" error when loading some modules.
15136f685c5cSDave Martin
15146f685c5cSDave Martin	  Until fixed tools are available, passing
15156f685c5cSDave Martin	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
15166f685c5cSDave Martin	  code which hits this problem, at the cost of a bit of extra runtime
15176f685c5cSDave Martin	  stack usage in some cases.
15186f685c5cSDave Martin
15196f685c5cSDave Martin	  The problem is described in more detail at:
15206f685c5cSDave Martin	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
15216f685c5cSDave Martin
15226f685c5cSDave Martin	  Only Thumb-2 kernels are affected.
15236f685c5cSDave Martin
15246f685c5cSDave Martin	  Unless you are sure your tools don't have this problem, say Y.
15256f685c5cSDave Martin
15260becb088SCatalin Marinasconfig ARM_ASM_UNIFIED
15270becb088SCatalin Marinas	bool
15280becb088SCatalin Marinas
152942f25bddSNicolas Pitreconfig ARM_PATCH_IDIV
153042f25bddSNicolas Pitre	bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
153142f25bddSNicolas Pitre	depends on CPU_32v7 && !XIP_KERNEL
153242f25bddSNicolas Pitre	default y
153342f25bddSNicolas Pitre	help
153442f25bddSNicolas Pitre	  The ARM compiler inserts calls to __aeabi_idiv() and
153542f25bddSNicolas Pitre	  __aeabi_uidiv() when it needs to perform division on signed
153642f25bddSNicolas Pitre	  and unsigned integers. Some v7 CPUs have support for the sdiv
153742f25bddSNicolas Pitre	  and udiv instructions that can be used to implement those
153842f25bddSNicolas Pitre	  functions.
153942f25bddSNicolas Pitre
154042f25bddSNicolas Pitre	  Enabling this option allows the kernel to modify itself to
154142f25bddSNicolas Pitre	  replace the first two instructions of these library functions
154242f25bddSNicolas Pitre	  with the sdiv or udiv plus "bx lr" instructions when the CPU
154342f25bddSNicolas Pitre	  it is running on supports them. Typically this will be faster
154442f25bddSNicolas Pitre	  and less power intensive than running the original library
154542f25bddSNicolas Pitre	  code to do integer division.
154642f25bddSNicolas Pitre
1547704bdda0SNicolas Pitreconfig AEABI
1548704bdda0SNicolas Pitre	bool "Use the ARM EABI to compile the kernel"
1549704bdda0SNicolas Pitre	help
1550704bdda0SNicolas Pitre	  This option allows for the kernel to be compiled using the latest
1551704bdda0SNicolas Pitre	  ARM ABI (aka EABI).  This is only useful if you are using a user
1552704bdda0SNicolas Pitre	  space environment that is also compiled with EABI.
1553704bdda0SNicolas Pitre
1554704bdda0SNicolas Pitre	  Since there are major incompatibilities between the legacy ABI and
1555704bdda0SNicolas Pitre	  EABI, especially with regard to structure member alignment, this
1556704bdda0SNicolas Pitre	  option also changes the kernel syscall calling convention to
1557704bdda0SNicolas Pitre	  disambiguate both ABIs and allow for backward compatibility support
1558704bdda0SNicolas Pitre	  (selected with CONFIG_OABI_COMPAT).
1559704bdda0SNicolas Pitre
1560704bdda0SNicolas Pitre	  To use this you need GCC version 4.0.0 or later.
1561704bdda0SNicolas Pitre
15626c90c872SNicolas Pitreconfig OABI_COMPAT
1563a73a3ff1SRussell King	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1564d6f94fa0SKees Cook	depends on AEABI && !THUMB2_KERNEL
15656c90c872SNicolas Pitre	help
15666c90c872SNicolas Pitre	  This option preserves the old syscall interface along with the
15676c90c872SNicolas Pitre	  new (ARM EABI) one. It also provides a compatibility layer to
15686c90c872SNicolas Pitre	  intercept syscalls that have structure arguments which layout
15696c90c872SNicolas Pitre	  in memory differs between the legacy ABI and the new ARM EABI
15706c90c872SNicolas Pitre	  (only for non "thumb" binaries). This option adds a tiny
15716c90c872SNicolas Pitre	  overhead to all syscalls and produces a slightly larger kernel.
157291702175SKees Cook
157391702175SKees Cook	  The seccomp filter system will not be available when this is
157491702175SKees Cook	  selected, since there is no way yet to sensibly distinguish
157591702175SKees Cook	  between calling conventions during filtering.
157691702175SKees Cook
15776c90c872SNicolas Pitre	  If you know you'll be using only pure EABI user space then you
15786c90c872SNicolas Pitre	  can say N here. If this option is not selected and you attempt
15796c90c872SNicolas Pitre	  to execute a legacy ABI binary then the result will be
15806c90c872SNicolas Pitre	  UNPREDICTABLE (in fact it can be predicted that it won't work
1581b02f8467SKees Cook	  at all). If in doubt say N.
15826c90c872SNicolas Pitre
1583eb33575cSMel Gormanconfig ARCH_HAS_HOLES_MEMORYMODEL
1584e80d6a24SMel Gorman	bool
1585e80d6a24SMel Gorman
158605944d74SRussell Kingconfig ARCH_SPARSEMEM_ENABLE
158705944d74SRussell King	bool
158805944d74SRussell King
158907a2f737SRussell Kingconfig ARCH_SPARSEMEM_DEFAULT
159007a2f737SRussell King	def_bool ARCH_SPARSEMEM_ENABLE
159107a2f737SRussell King
159205944d74SRussell Kingconfig ARCH_SELECT_MEMORY_MODEL
1593be370302SRussell King	def_bool ARCH_SPARSEMEM_ENABLE
1594c80d79d7SYasunori Goto
15957b7bf499SWill Deaconconfig HAVE_ARCH_PFN_VALID
15967b7bf499SWill Deacon	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
15977b7bf499SWill Deacon
1598b8cd51afSSteve Capperconfig HAVE_GENERIC_RCU_GUP
1599b8cd51afSSteve Capper	def_bool y
1600b8cd51afSSteve Capper	depends on ARM_LPAE
1601b8cd51afSSteve Capper
1602053a96caSNicolas Pitreconfig HIGHMEM
1603e8db89a2SRussell King	bool "High Memory Support"
1604e8db89a2SRussell King	depends on MMU
1605053a96caSNicolas Pitre	help
1606053a96caSNicolas Pitre	  The address space of ARM processors is only 4 Gigabytes large
1607053a96caSNicolas Pitre	  and it has to accommodate user address space, kernel address
1608053a96caSNicolas Pitre	  space as well as some memory mapped IO. That means that, if you
1609053a96caSNicolas Pitre	  have a large amount of physical memory and/or IO, not all of the
1610053a96caSNicolas Pitre	  memory can be "permanently mapped" by the kernel. The physical
1611053a96caSNicolas Pitre	  memory that is not permanently mapped is called "high memory".
1612053a96caSNicolas Pitre
1613053a96caSNicolas Pitre	  Depending on the selected kernel/user memory split, minimum
1614053a96caSNicolas Pitre	  vmalloc space and actual amount of RAM, you may not need this
1615053a96caSNicolas Pitre	  option which should result in a slightly faster kernel.
1616053a96caSNicolas Pitre
1617053a96caSNicolas Pitre	  If unsure, say n.
1618053a96caSNicolas Pitre
161965cec8e3SRussell Kingconfig HIGHPTE
16209a431bd5SRussell King	bool "Allocate 2nd-level pagetables from highmem" if EXPERT
162165cec8e3SRussell King	depends on HIGHMEM
16229a431bd5SRussell King	default y
1623b4d103d1SRussell King	help
1624b4d103d1SRussell King	  The VM uses one page of physical memory for each page table.
1625b4d103d1SRussell King	  For systems with a lot of processes, this can use a lot of
1626b4d103d1SRussell King	  precious low memory, eventually leading to low memory being
1627b4d103d1SRussell King	  consumed by page tables.  Setting this option will allow
1628b4d103d1SRussell King	  user-space 2nd level page tables to reside in high memory.
162965cec8e3SRussell King
1630a5e090acSRussell Kingconfig CPU_SW_DOMAIN_PAN
1631a5e090acSRussell King	bool "Enable use of CPU domains to implement privileged no-access"
1632a5e090acSRussell King	depends on MMU && !ARM_LPAE
16331b8873a0SJamie Iles	default y
16341b8873a0SJamie Iles	help
1635a5e090acSRussell King	  Increase kernel security by ensuring that normal kernel accesses
1636a5e090acSRussell King	  are unable to access userspace addresses.  This can help prevent
1637a5e090acSRussell King	  use-after-free bugs becoming an exploitable privilege escalation
1638a5e090acSRussell King	  by ensuring that magic values (such as LIST_POISON) will always
1639a5e090acSRussell King	  fault when dereferenced.
1640a5e090acSRussell King
1641a5e090acSRussell King	  CPUs with low-vector mappings use a best-efforts implementation.
1642a5e090acSRussell King	  Their lower 1MB needs to remain accessible for the vectors, but
1643a5e090acSRussell King	  the remainder of userspace will become appropriately inaccessible.
16441da177e4SLinus Torvalds
16451da177e4SLinus Torvaldsconfig HW_PERF_EVENTS
1646fa8ad788SMark Rutland	def_bool y
1647fa8ad788SMark Rutland	depends on ARM_PMU
16481b8873a0SJamie Iles
16491355e2a6SCatalin Marinasconfig SYS_SUPPORTS_HUGETLBFS
16501355e2a6SCatalin Marinas       def_bool y
16511355e2a6SCatalin Marinas       depends on ARM_LPAE
16521355e2a6SCatalin Marinas
16538d962507SCatalin Marinasconfig HAVE_ARCH_TRANSPARENT_HUGEPAGE
16548d962507SCatalin Marinas       def_bool y
16558d962507SCatalin Marinas       depends on ARM_LPAE
16568d962507SCatalin Marinas
16574bfab203SSteven Capperconfig ARCH_WANT_GENERAL_HUGETLB
16584bfab203SSteven Capper	def_bool y
16594bfab203SSteven Capper
16607d485f64SArd Biesheuvelconfig ARM_MODULE_PLTS
16617d485f64SArd Biesheuvel	bool "Use PLTs to allow module memory to spill over into vmalloc area"
16627d485f64SArd Biesheuvel	depends on MODULES
16637d485f64SArd Biesheuvel	help
16647d485f64SArd Biesheuvel	  Allocate PLTs when loading modules so that jumps and calls whose
16657d485f64SArd Biesheuvel	  targets are too far away for their relative offsets to be encoded
16667d485f64SArd Biesheuvel	  in the instructions themselves can be bounced via veneers in the
16677d485f64SArd Biesheuvel	  module's PLT. This allows modules to be allocated in the generic
16687d485f64SArd Biesheuvel	  vmalloc area after the dedicated module memory area has been
16697d485f64SArd Biesheuvel	  exhausted. The modules will use slightly more memory, but after
16707d485f64SArd Biesheuvel	  rounding up to page size, the actual memory footprint is usually
16717d485f64SArd Biesheuvel	  the same.
16727d485f64SArd Biesheuvel
16737d485f64SArd Biesheuvel	  Say y if you are getting out of memory errors while loading modules
16747d485f64SArd Biesheuvel
16751da177e4SLinus Torvaldssource "mm/Kconfig"
16761da177e4SLinus Torvalds
1677c1b2d970SMagnus Dammconfig FORCE_MAX_ZONEORDER
167836d6c928SUlrich Hecht	int "Maximum zone order"
1679898f08e1SYegor Yefremov	default "12" if SOC_AM33XX
16806d85e2b0SUwe Kleine-König	default "9" if SA1111 || ARCH_EFM32
1681c1b2d970SMagnus Damm	default "11"
1682c1b2d970SMagnus Damm	help
1683c1b2d970SMagnus Damm	  The kernel memory allocator divides physically contiguous memory
1684c1b2d970SMagnus Damm	  blocks into "zones", where each zone is a power of two number of
1685c1b2d970SMagnus Damm	  pages.  This option selects the largest power of two that the kernel
1686c1b2d970SMagnus Damm	  keeps in the memory allocator.  If you need to allocate very large
1687c1b2d970SMagnus Damm	  blocks of physically contiguous memory, then you may need to
1688c1b2d970SMagnus Damm	  increase this value.
1689c1b2d970SMagnus Damm
1690c1b2d970SMagnus Damm	  This config option is actually maximum order plus one. For example,
1691c1b2d970SMagnus Damm	  a value of 11 means that the largest free memory block is 2^10 pages.
1692c1b2d970SMagnus Damm
16931da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP
16941da177e4SLinus Torvalds	bool
1695f12d0d7cSHyok S. Choi	depends on CPU_CP15_MMU
16961da177e4SLinus Torvalds	default y if !ARCH_EBSA110
1697e119bfffSRussell King	select HAVE_PROC_CPU if PROC_FS
16981da177e4SLinus Torvalds	help
16991da177e4SLinus Torvalds	  ARM processors cannot fetch/store information which is not
17001da177e4SLinus Torvalds	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
17011da177e4SLinus Torvalds	  address divisible by 4. On 32-bit ARM processors, these non-aligned
17021da177e4SLinus Torvalds	  fetch/store instructions will be emulated in software if you say
17031da177e4SLinus Torvalds	  here, which has a severe performance impact. This is necessary for
17041da177e4SLinus Torvalds	  correct operation of some network protocols. With an IP-only
17051da177e4SLinus Torvalds	  configuration it is safe to say N, otherwise say Y.
17061da177e4SLinus Torvalds
170739ec58f3SLennert Buytenhekconfig UACCESS_WITH_MEMCPY
170838ef2ad5SLinus Walleij	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
170938ef2ad5SLinus Walleij	depends on MMU
171039ec58f3SLennert Buytenhek	default y if CPU_FEROCEON
171139ec58f3SLennert Buytenhek	help
171239ec58f3SLennert Buytenhek	  Implement faster copy_to_user and clear_user methods for CPU
171339ec58f3SLennert Buytenhek	  cores where a 8-word STM instruction give significantly higher
171439ec58f3SLennert Buytenhek	  memory write throughput than a sequence of individual 32bit stores.
171539ec58f3SLennert Buytenhek
171639ec58f3SLennert Buytenhek	  A possible side effect is a slight increase in scheduling latency
171739ec58f3SLennert Buytenhek	  between threads sharing the same address space if they invoke
171839ec58f3SLennert Buytenhek	  such copy operations with large buffers.
171939ec58f3SLennert Buytenhek
172039ec58f3SLennert Buytenhek	  However, if the CPU data cache is using a write-allocate mode,
172139ec58f3SLennert Buytenhek	  this option is unlikely to provide any performance gain.
172239ec58f3SLennert Buytenhek
172370c70d97SNicolas Pitreconfig SECCOMP
172470c70d97SNicolas Pitre	bool
172570c70d97SNicolas Pitre	prompt "Enable seccomp to safely compute untrusted bytecode"
172670c70d97SNicolas Pitre	---help---
172770c70d97SNicolas Pitre	  This kernel feature is useful for number crunching applications
172870c70d97SNicolas Pitre	  that may need to compute untrusted bytecode during their
172970c70d97SNicolas Pitre	  execution. By using pipes or other transports made available to
173070c70d97SNicolas Pitre	  the process as file descriptors supporting the read/write
173170c70d97SNicolas Pitre	  syscalls, it's possible to isolate those applications in
173270c70d97SNicolas Pitre	  their own address space using seccomp. Once seccomp is
173370c70d97SNicolas Pitre	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
173470c70d97SNicolas Pitre	  and the task is only allowed to execute a few safe syscalls
173570c70d97SNicolas Pitre	  defined by each seccomp mode.
173670c70d97SNicolas Pitre
173706e6295bSStefano Stabelliniconfig SWIOTLB
173806e6295bSStefano Stabellini	def_bool y
173906e6295bSStefano Stabellini
174006e6295bSStefano Stabelliniconfig IOMMU_HELPER
174106e6295bSStefano Stabellini	def_bool SWIOTLB
174206e6295bSStefano Stabellini
174302c2433bSStefano Stabelliniconfig PARAVIRT
174402c2433bSStefano Stabellini	bool "Enable paravirtualization code"
174502c2433bSStefano Stabellini	help
174602c2433bSStefano Stabellini	  This changes the kernel so it can modify itself when it is run
174702c2433bSStefano Stabellini	  under a hypervisor, potentially improving performance significantly
174802c2433bSStefano Stabellini	  over full virtualization.
174902c2433bSStefano Stabellini
175002c2433bSStefano Stabelliniconfig PARAVIRT_TIME_ACCOUNTING
175102c2433bSStefano Stabellini	bool "Paravirtual steal time accounting"
175202c2433bSStefano Stabellini	select PARAVIRT
175302c2433bSStefano Stabellini	default n
175402c2433bSStefano Stabellini	help
175502c2433bSStefano Stabellini	  Select this option to enable fine granularity task steal time
175602c2433bSStefano Stabellini	  accounting. Time spent executing other tasks in parallel with
175702c2433bSStefano Stabellini	  the current vCPU is discounted from the vCPU power. To account for
175802c2433bSStefano Stabellini	  that, there can be a small performance impact.
175902c2433bSStefano Stabellini
176002c2433bSStefano Stabellini	  If in doubt, say N here.
176102c2433bSStefano Stabellini
1762eff8d644SStefano Stabelliniconfig XEN_DOM0
1763eff8d644SStefano Stabellini	def_bool y
1764eff8d644SStefano Stabellini	depends on XEN
1765eff8d644SStefano Stabellini
1766eff8d644SStefano Stabelliniconfig XEN
1767c2ba1f7dSJulien Grall	bool "Xen guest support on ARM"
176885323a99SIan Campbell	depends on ARM && AEABI && OF
1769f880b67dSArnd Bergmann	depends on CPU_V7 && !CPU_V6
177085323a99SIan Campbell	depends on !GENERIC_ATOMIC64
17717693deccSUwe Kleine-König	depends on MMU
177251aaf81fSRussell King	select ARCH_DMA_ADDR_T_64BIT
177317b7ab80SStefano Stabellini	select ARM_PSCI
177483862ccfSStefano Stabellini	select SWIOTLB_XEN
177502c2433bSStefano Stabellini	select PARAVIRT
1776eff8d644SStefano Stabellini	help
1777eff8d644SStefano Stabellini	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1778eff8d644SStefano Stabellini
17791da177e4SLinus Torvaldsendmenu
17801da177e4SLinus Torvalds
17811da177e4SLinus Torvaldsmenu "Boot options"
17821da177e4SLinus Torvalds
17839eb8f674SGrant Likelyconfig USE_OF
17849eb8f674SGrant Likely	bool "Flattened Device Tree support"
1785b1b3f49cSRussell King	select IRQ_DOMAIN
17869eb8f674SGrant Likely	select OF
17879eb8f674SGrant Likely	help
17889eb8f674SGrant Likely	  Include support for flattened device tree machine descriptions.
17899eb8f674SGrant Likely
1790bd51e2f5SNicolas Pitreconfig ATAGS
1791bd51e2f5SNicolas Pitre	bool "Support for the traditional ATAGS boot data passing" if USE_OF
1792bd51e2f5SNicolas Pitre	default y
1793bd51e2f5SNicolas Pitre	help
1794bd51e2f5SNicolas Pitre	  This is the traditional way of passing data to the kernel at boot
1795bd51e2f5SNicolas Pitre	  time. If you are solely relying on the flattened device tree (or
1796bd51e2f5SNicolas Pitre	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1797bd51e2f5SNicolas Pitre	  to remove ATAGS support from your kernel binary.  If unsure,
1798bd51e2f5SNicolas Pitre	  leave this to y.
1799bd51e2f5SNicolas Pitre
1800bd51e2f5SNicolas Pitreconfig DEPRECATED_PARAM_STRUCT
1801bd51e2f5SNicolas Pitre	bool "Provide old way to pass kernel parameters"
1802bd51e2f5SNicolas Pitre	depends on ATAGS
1803bd51e2f5SNicolas Pitre	help
1804bd51e2f5SNicolas Pitre	  This was deprecated in 2001 and announced to live on for 5 years.
1805bd51e2f5SNicolas Pitre	  Some old boot loaders still use this way.
1806bd51e2f5SNicolas Pitre
18071da177e4SLinus Torvalds# Compressed boot loader in ROM.  Yes, we really want to ask about
18081da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files.
18091da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT
18101da177e4SLinus Torvalds	hex "Compressed ROM boot loader base address"
18111da177e4SLinus Torvalds	default "0"
18121da177e4SLinus Torvalds	help
18131da177e4SLinus Torvalds	  The physical address at which the ROM-able zImage is to be
18141da177e4SLinus Torvalds	  placed in the target.  Platforms which normally make use of
18151da177e4SLinus Torvalds	  ROM-able zImage formats normally set this to a suitable
18161da177e4SLinus Torvalds	  value in their defconfig file.
18171da177e4SLinus Torvalds
18181da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
18191da177e4SLinus Torvalds
18201da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS
18211da177e4SLinus Torvalds	hex "Compressed ROM boot loader BSS address"
18221da177e4SLinus Torvalds	default "0"
18231da177e4SLinus Torvalds	help
1824f8c440b2SDan Fandrich	  The base address of an area of read/write memory in the target
1825f8c440b2SDan Fandrich	  for the ROM-able zImage which must be available while the
1826f8c440b2SDan Fandrich	  decompressor is running. It must be large enough to hold the
1827f8c440b2SDan Fandrich	  entire decompressed kernel plus an additional 128 KiB.
1828f8c440b2SDan Fandrich	  Platforms which normally make use of ROM-able zImage formats
1829f8c440b2SDan Fandrich	  normally set this to a suitable value in their defconfig file.
18301da177e4SLinus Torvalds
18311da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
18321da177e4SLinus Torvalds
18331da177e4SLinus Torvaldsconfig ZBOOT_ROM
18341da177e4SLinus Torvalds	bool "Compressed boot loader in ROM/flash"
18351da177e4SLinus Torvalds	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
183610968131SRussell King	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
18371da177e4SLinus Torvalds	help
18381da177e4SLinus Torvalds	  Say Y here if you intend to execute your compressed kernel image
18391da177e4SLinus Torvalds	  (zImage) directly from ROM or flash.  If unsure, say N.
18401da177e4SLinus Torvalds
1841e2a6a3aaSJohn Bonesioconfig ARM_APPENDED_DTB
1842e2a6a3aaSJohn Bonesio	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
184310968131SRussell King	depends on OF
1844e2a6a3aaSJohn Bonesio	help
1845e2a6a3aaSJohn Bonesio	  With this option, the boot code will look for a device tree binary
1846e2a6a3aaSJohn Bonesio	  (DTB) appended to zImage
1847e2a6a3aaSJohn Bonesio	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1848e2a6a3aaSJohn Bonesio
1849e2a6a3aaSJohn Bonesio	  This is meant as a backward compatibility convenience for those
1850e2a6a3aaSJohn Bonesio	  systems with a bootloader that can't be upgraded to accommodate
1851e2a6a3aaSJohn Bonesio	  the documented boot protocol using a device tree.
1852e2a6a3aaSJohn Bonesio
1853e2a6a3aaSJohn Bonesio	  Beware that there is very little in terms of protection against
1854e2a6a3aaSJohn Bonesio	  this option being confused by leftover garbage in memory that might
1855e2a6a3aaSJohn Bonesio	  look like a DTB header after a reboot if no actual DTB is appended
1856e2a6a3aaSJohn Bonesio	  to zImage.  Do not leave this option active in a production kernel
1857e2a6a3aaSJohn Bonesio	  if you don't intend to always append a DTB.  Proper passing of the
1858e2a6a3aaSJohn Bonesio	  location into r2 of a bootloader provided DTB is always preferable
1859e2a6a3aaSJohn Bonesio	  to this option.
1860e2a6a3aaSJohn Bonesio
1861b90b9a38SNicolas Pitreconfig ARM_ATAG_DTB_COMPAT
1862b90b9a38SNicolas Pitre	bool "Supplement the appended DTB with traditional ATAG information"
1863b90b9a38SNicolas Pitre	depends on ARM_APPENDED_DTB
1864b90b9a38SNicolas Pitre	help
1865b90b9a38SNicolas Pitre	  Some old bootloaders can't be updated to a DTB capable one, yet
1866b90b9a38SNicolas Pitre	  they provide ATAGs with memory configuration, the ramdisk address,
1867b90b9a38SNicolas Pitre	  the kernel cmdline string, etc.  Such information is dynamically
1868b90b9a38SNicolas Pitre	  provided by the bootloader and can't always be stored in a static
1869b90b9a38SNicolas Pitre	  DTB.  To allow a device tree enabled kernel to be used with such
1870b90b9a38SNicolas Pitre	  bootloaders, this option allows zImage to extract the information
1871b90b9a38SNicolas Pitre	  from the ATAG list and store it at run time into the appended DTB.
1872b90b9a38SNicolas Pitre
1873d0f34a11SGenoud Richardchoice
1874d0f34a11SGenoud Richard	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1875d0f34a11SGenoud Richard	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1876d0f34a11SGenoud Richard
1877d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1878d0f34a11SGenoud Richard	bool "Use bootloader kernel arguments if available"
1879d0f34a11SGenoud Richard	help
1880d0f34a11SGenoud Richard	  Uses the command-line options passed by the boot loader instead of
1881d0f34a11SGenoud Richard	  the device tree bootargs property. If the boot loader doesn't provide
1882d0f34a11SGenoud Richard	  any, the device tree bootargs property will be used.
1883d0f34a11SGenoud Richard
1884d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1885d0f34a11SGenoud Richard	bool "Extend with bootloader kernel arguments"
1886d0f34a11SGenoud Richard	help
1887d0f34a11SGenoud Richard	  The command-line arguments provided by the boot loader will be
1888d0f34a11SGenoud Richard	  appended to the the device tree bootargs property.
1889d0f34a11SGenoud Richard
1890d0f34a11SGenoud Richardendchoice
1891d0f34a11SGenoud Richard
18921da177e4SLinus Torvaldsconfig CMDLINE
18931da177e4SLinus Torvalds	string "Default kernel command string"
18941da177e4SLinus Torvalds	default ""
18951da177e4SLinus Torvalds	help
18961da177e4SLinus Torvalds	  On some architectures (EBSA110 and CATS), there is currently no way
18971da177e4SLinus Torvalds	  for the boot loader to pass arguments to the kernel. For these
18981da177e4SLinus Torvalds	  architectures, you should supply some command-line options at build
18991da177e4SLinus Torvalds	  time by entering them here. As a minimum, you should specify the
19001da177e4SLinus Torvalds	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
19011da177e4SLinus Torvalds
19024394c124SVictor Boiviechoice
19034394c124SVictor Boivie	prompt "Kernel command line type" if CMDLINE != ""
19044394c124SVictor Boivie	default CMDLINE_FROM_BOOTLOADER
1905bd51e2f5SNicolas Pitre	depends on ATAGS
19064394c124SVictor Boivie
19074394c124SVictor Boivieconfig CMDLINE_FROM_BOOTLOADER
19084394c124SVictor Boivie	bool "Use bootloader kernel arguments if available"
19094394c124SVictor Boivie	help
19104394c124SVictor Boivie	  Uses the command-line options passed by the boot loader. If
19114394c124SVictor Boivie	  the boot loader doesn't provide any, the default kernel command
19124394c124SVictor Boivie	  string provided in CMDLINE will be used.
19134394c124SVictor Boivie
19144394c124SVictor Boivieconfig CMDLINE_EXTEND
19154394c124SVictor Boivie	bool "Extend bootloader kernel arguments"
19164394c124SVictor Boivie	help
19174394c124SVictor Boivie	  The command-line arguments provided by the boot loader will be
19184394c124SVictor Boivie	  appended to the default kernel command string.
19194394c124SVictor Boivie
192092d2040dSAlexander Hollerconfig CMDLINE_FORCE
192192d2040dSAlexander Holler	bool "Always use the default kernel command string"
192292d2040dSAlexander Holler	help
192392d2040dSAlexander Holler	  Always use the default kernel command string, even if the boot
192492d2040dSAlexander Holler	  loader passes other arguments to the kernel.
192592d2040dSAlexander Holler	  This is useful if you cannot or don't want to change the
192692d2040dSAlexander Holler	  command-line options your boot loader passes to the kernel.
19274394c124SVictor Boivieendchoice
192892d2040dSAlexander Holler
19291da177e4SLinus Torvaldsconfig XIP_KERNEL
19301da177e4SLinus Torvalds	bool "Kernel Execute-In-Place from ROM"
193110968131SRussell King	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
19321da177e4SLinus Torvalds	help
19331da177e4SLinus Torvalds	  Execute-In-Place allows the kernel to run from non-volatile storage
19341da177e4SLinus Torvalds	  directly addressable by the CPU, such as NOR flash. This saves RAM
19351da177e4SLinus Torvalds	  space since the text section of the kernel is not loaded from flash
19361da177e4SLinus Torvalds	  to RAM.  Read-write sections, such as the data section and stack,
19371da177e4SLinus Torvalds	  are still copied to RAM.  The XIP kernel is not compressed since
19381da177e4SLinus Torvalds	  it has to run directly from flash, so it will take more space to
19391da177e4SLinus Torvalds	  store it.  The flash address used to link the kernel object files,
19401da177e4SLinus Torvalds	  and for storing it, is configuration dependent. Therefore, if you
19411da177e4SLinus Torvalds	  say Y here, you must know the proper physical address where to
19421da177e4SLinus Torvalds	  store the kernel image depending on your own flash memory usage.
19431da177e4SLinus Torvalds
19441da177e4SLinus Torvalds	  Also note that the make target becomes "make xipImage" rather than
19451da177e4SLinus Torvalds	  "make zImage" or "make Image".  The final kernel binary to put in
19461da177e4SLinus Torvalds	  ROM memory will be arch/arm/boot/xipImage.
19471da177e4SLinus Torvalds
19481da177e4SLinus Torvalds	  If unsure, say N.
19491da177e4SLinus Torvalds
19501da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR
19511da177e4SLinus Torvalds	hex "XIP Kernel Physical Location"
19521da177e4SLinus Torvalds	depends on XIP_KERNEL
19531da177e4SLinus Torvalds	default "0x00080000"
19541da177e4SLinus Torvalds	help
19551da177e4SLinus Torvalds	  This is the physical address in your flash memory the kernel will
19561da177e4SLinus Torvalds	  be linked for and stored to.  This address is dependent on your
19571da177e4SLinus Torvalds	  own flash usage.
19581da177e4SLinus Torvalds
1959c587e4a6SRichard Purdieconfig KEXEC
1960c587e4a6SRichard Purdie	bool "Kexec system call (EXPERIMENTAL)"
196119ab428fSStephen Warren	depends on (!SMP || PM_SLEEP_SMP)
1962cb1293e2SArnd Bergmann	depends on !CPU_V7M
19632965faa5SDave Young	select KEXEC_CORE
1964c587e4a6SRichard Purdie	help
1965c587e4a6SRichard Purdie	  kexec is a system call that implements the ability to shutdown your
1966c587e4a6SRichard Purdie	  current kernel, and to start another kernel.  It is like a reboot
196701dd2fbfSMatt LaPlante	  but it is independent of the system firmware.   And like a reboot
1968c587e4a6SRichard Purdie	  you can start any kernel with it, not just Linux.
1969c587e4a6SRichard Purdie
1970c587e4a6SRichard Purdie	  It is an ongoing process to be certain the hardware in a machine
1971c587e4a6SRichard Purdie	  is properly shutdown, so do not be surprised if this code does not
1972bf220695SGeert Uytterhoeven	  initially work for you.
1973c587e4a6SRichard Purdie
19744cd9d6f7SRichard Purdieconfig ATAGS_PROC
19754cd9d6f7SRichard Purdie	bool "Export atags in procfs"
1976bd51e2f5SNicolas Pitre	depends on ATAGS && KEXEC
1977b98d7291SUli Luckas	default y
19784cd9d6f7SRichard Purdie	help
19794cd9d6f7SRichard Purdie	  Should the atags used to boot the kernel be exported in an "atags"
19804cd9d6f7SRichard Purdie	  file in procfs. Useful with kexec.
19814cd9d6f7SRichard Purdie
1982cb5d39b3SMika Westerbergconfig CRASH_DUMP
1983cb5d39b3SMika Westerberg	bool "Build kdump crash kernel (EXPERIMENTAL)"
1984cb5d39b3SMika Westerberg	help
1985cb5d39b3SMika Westerberg	  Generate crash dump after being started by kexec. This should
1986cb5d39b3SMika Westerberg	  be normally only set in special crash dump kernels which are
1987cb5d39b3SMika Westerberg	  loaded in the main kernel with kexec-tools into a specially
1988cb5d39b3SMika Westerberg	  reserved region and then later executed after a crash by
1989cb5d39b3SMika Westerberg	  kdump/kexec. The crash dump kernel must be compiled to a
1990cb5d39b3SMika Westerberg	  memory address not used by the main kernel
1991cb5d39b3SMika Westerberg
1992cb5d39b3SMika Westerberg	  For more details see Documentation/kdump/kdump.txt
1993cb5d39b3SMika Westerberg
1994e69edc79SEric Miaoconfig AUTO_ZRELADDR
1995e69edc79SEric Miao	bool "Auto calculation of the decompressed kernel image address"
1996e69edc79SEric Miao	help
1997e69edc79SEric Miao	  ZRELADDR is the physical address where the decompressed kernel
1998e69edc79SEric Miao	  image will be placed. If AUTO_ZRELADDR is selected, the address
1999e69edc79SEric Miao	  will be determined at run-time by masking the current IP with
2000e69edc79SEric Miao	  0xf8000000. This assumes the zImage being placed in the first 128MB
2001e69edc79SEric Miao	  from start of memory.
2002e69edc79SEric Miao
200381a0bc39SRoy Franzconfig EFI_STUB
200481a0bc39SRoy Franz	bool
200581a0bc39SRoy Franz
200681a0bc39SRoy Franzconfig EFI
200781a0bc39SRoy Franz	bool "UEFI runtime support"
200881a0bc39SRoy Franz	depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
200981a0bc39SRoy Franz	select UCS2_STRING
201081a0bc39SRoy Franz	select EFI_PARAMS_FROM_FDT
201181a0bc39SRoy Franz	select EFI_STUB
201281a0bc39SRoy Franz	select EFI_ARMSTUB
201381a0bc39SRoy Franz	select EFI_RUNTIME_WRAPPERS
201481a0bc39SRoy Franz	---help---
201581a0bc39SRoy Franz	  This option provides support for runtime services provided
201681a0bc39SRoy Franz	  by UEFI firmware (such as non-volatile variables, realtime
201781a0bc39SRoy Franz	  clock, and platform reset). A UEFI stub is also provided to
201881a0bc39SRoy Franz	  allow the kernel to be booted as an EFI application. This
201981a0bc39SRoy Franz	  is only useful for kernels that may run on systems that have
202081a0bc39SRoy Franz	  UEFI firmware.
202181a0bc39SRoy Franz
20221da177e4SLinus Torvaldsendmenu
20231da177e4SLinus Torvalds
2024ac9d7efcSRussell Kingmenu "CPU Power Management"
20251da177e4SLinus Torvalds
20261da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig"
20271da177e4SLinus Torvalds
2028ac9d7efcSRussell Kingsource "drivers/cpuidle/Kconfig"
2029ac9d7efcSRussell King
2030ac9d7efcSRussell Kingendmenu
2031ac9d7efcSRussell King
20321da177e4SLinus Torvaldsmenu "Floating point emulation"
20331da177e4SLinus Torvalds
20341da177e4SLinus Torvaldscomment "At least one emulation must be selected"
20351da177e4SLinus Torvalds
20361da177e4SLinus Torvaldsconfig FPE_NWFPE
20371da177e4SLinus Torvalds	bool "NWFPE math emulation"
2038593c252aSDave Martin	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
20391da177e4SLinus Torvalds	---help---
20401da177e4SLinus Torvalds	  Say Y to include the NWFPE floating point emulator in the kernel.
20411da177e4SLinus Torvalds	  This is necessary to run most binaries. Linux does not currently
20421da177e4SLinus Torvalds	  support floating point hardware so you need to say Y here even if
20431da177e4SLinus Torvalds	  your machine has an FPA or floating point co-processor podule.
20441da177e4SLinus Torvalds
20451da177e4SLinus Torvalds	  You may say N here if you are going to load the Acorn FPEmulator
20461da177e4SLinus Torvalds	  early in the bootup.
20471da177e4SLinus Torvalds
20481da177e4SLinus Torvaldsconfig FPE_NWFPE_XP
20491da177e4SLinus Torvalds	bool "Support extended precision"
2050bedf142bSLennert Buytenhek	depends on FPE_NWFPE
20511da177e4SLinus Torvalds	help
20521da177e4SLinus Torvalds	  Say Y to include 80-bit support in the kernel floating-point
20531da177e4SLinus Torvalds	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
20541da177e4SLinus Torvalds	  Note that gcc does not generate 80-bit operations by default,
20551da177e4SLinus Torvalds	  so in most cases this option only enlarges the size of the
20561da177e4SLinus Torvalds	  floating point emulator without any good reason.
20571da177e4SLinus Torvalds
20581da177e4SLinus Torvalds	  You almost surely want to say N here.
20591da177e4SLinus Torvalds
20601da177e4SLinus Torvaldsconfig FPE_FASTFPE
20611da177e4SLinus Torvalds	bool "FastFPE math emulation (EXPERIMENTAL)"
2062d6f94fa0SKees Cook	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
20631da177e4SLinus Torvalds	---help---
20641da177e4SLinus Torvalds	  Say Y here to include the FAST floating point emulator in the kernel.
20651da177e4SLinus Torvalds	  This is an experimental much faster emulator which now also has full
20661da177e4SLinus Torvalds	  precision for the mantissa.  It does not support any exceptions.
20671da177e4SLinus Torvalds	  It is very simple, and approximately 3-6 times faster than NWFPE.
20681da177e4SLinus Torvalds
20691da177e4SLinus Torvalds	  It should be sufficient for most programs.  It may be not suitable
20701da177e4SLinus Torvalds	  for scientific calculations, but you have to check this for yourself.
20711da177e4SLinus Torvalds	  If you do not feel you need a faster FP emulation you should better
20721da177e4SLinus Torvalds	  choose NWFPE.
20731da177e4SLinus Torvalds
20741da177e4SLinus Torvaldsconfig VFP
20751da177e4SLinus Torvalds	bool "VFP-format floating point maths"
2076e399b1a4SRussell King	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
20771da177e4SLinus Torvalds	help
20781da177e4SLinus Torvalds	  Say Y to include VFP support code in the kernel. This is needed
20791da177e4SLinus Torvalds	  if your hardware includes a VFP unit.
20801da177e4SLinus Torvalds
20811da177e4SLinus Torvalds	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
20821da177e4SLinus Torvalds	  release notes and additional status information.
20831da177e4SLinus Torvalds
20841da177e4SLinus Torvalds	  Say N if your target does not have VFP hardware.
20851da177e4SLinus Torvalds
208625ebee02SCatalin Marinasconfig VFPv3
208725ebee02SCatalin Marinas	bool
208825ebee02SCatalin Marinas	depends on VFP
208925ebee02SCatalin Marinas	default y if CPU_V7
209025ebee02SCatalin Marinas
2091b5872db4SCatalin Marinasconfig NEON
2092b5872db4SCatalin Marinas	bool "Advanced SIMD (NEON) Extension support"
2093b5872db4SCatalin Marinas	depends on VFPv3 && CPU_V7
2094b5872db4SCatalin Marinas	help
2095b5872db4SCatalin Marinas	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2096b5872db4SCatalin Marinas	  Extension.
2097b5872db4SCatalin Marinas
209873c132c1SArd Biesheuvelconfig KERNEL_MODE_NEON
209973c132c1SArd Biesheuvel	bool "Support for NEON in kernel mode"
2100c4a30c3bSRussell King	depends on NEON && AEABI
210173c132c1SArd Biesheuvel	help
210273c132c1SArd Biesheuvel	  Say Y to include support for NEON in kernel mode.
210373c132c1SArd Biesheuvel
21041da177e4SLinus Torvaldsendmenu
21051da177e4SLinus Torvalds
21061da177e4SLinus Torvaldsmenu "Userspace binary formats"
21071da177e4SLinus Torvalds
21081da177e4SLinus Torvaldssource "fs/Kconfig.binfmt"
21091da177e4SLinus Torvalds
21101da177e4SLinus Torvaldsendmenu
21111da177e4SLinus Torvalds
21121da177e4SLinus Torvaldsmenu "Power management options"
21131da177e4SLinus Torvalds
2114eceab4acSRussell Kingsource "kernel/power/Kconfig"
21151da177e4SLinus Torvalds
2116f4cb5700SJohannes Bergconfig ARCH_SUSPEND_POSSIBLE
211719a0519dSEzequiel Garcia	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2118f0d75153SUwe Kleine-König		CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
2119f4cb5700SJohannes Berg	def_bool y
2120f4cb5700SJohannes Berg
212115e0d9e3SArnd Bergmannconfig ARM_CPU_SUSPEND
212215e0d9e3SArnd Bergmann	def_bool PM_SLEEP
212315e0d9e3SArnd Bergmann
2124603fb42aSSebastian Capellaconfig ARCH_HIBERNATION_POSSIBLE
2125603fb42aSSebastian Capella	bool
2126603fb42aSSebastian Capella	depends on MMU
2127603fb42aSSebastian Capella	default y if ARCH_SUSPEND_POSSIBLE
2128603fb42aSSebastian Capella
21291da177e4SLinus Torvaldsendmenu
21301da177e4SLinus Torvalds
2131d5950b43SSam Ravnborgsource "net/Kconfig"
2132d5950b43SSam Ravnborg
2133ac25150fSUwe Kleine-Königsource "drivers/Kconfig"
21341da177e4SLinus Torvalds
2135916f743dSKumar Galasource "drivers/firmware/Kconfig"
2136916f743dSKumar Gala
21371da177e4SLinus Torvaldssource "fs/Kconfig"
21381da177e4SLinus Torvalds
21391da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug"
21401da177e4SLinus Torvalds
21411da177e4SLinus Torvaldssource "security/Kconfig"
21421da177e4SLinus Torvalds
21431da177e4SLinus Torvaldssource "crypto/Kconfig"
2144652ccae5SArd Biesheuvelif CRYPTO
2145652ccae5SArd Biesheuvelsource "arch/arm/crypto/Kconfig"
2146652ccae5SArd Biesheuvelendif
21471da177e4SLinus Torvalds
21481da177e4SLinus Torvaldssource "lib/Kconfig"
2149749cf76cSChristoffer Dall
2150749cf76cSChristoffer Dallsource "arch/arm/kvm/Kconfig"
2151