xref: /linux/arch/arm/Kconfig (revision 42a0bb3f71383b457a7db362f1c69e7afb96732b)
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
446077776bSDaniel Borkmann	select HAVE_CBPF_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
535f56a5dfSJiri Slaby	select HAVE_EXIT_THREAD
54b1b3f49cSRussell King	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
55b1b3f49cSRussell King	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
56b1b3f49cSRussell King	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
57b1b3f49cSRussell King	select HAVE_GENERIC_DMA_COHERENT
58b1b3f49cSRussell King	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
59b1b3f49cSRussell King	select HAVE_IDE if PCI || ISA || PCMCIA
6087c46b6cSRussell King	select HAVE_IRQ_TIME_ACCOUNTING
61b1b3f49cSRussell King	select HAVE_KERNEL_GZIP
62f9b493acSKyungsik Lee	select HAVE_KERNEL_LZ4
63b1b3f49cSRussell King	select HAVE_KERNEL_LZMA
64b1b3f49cSRussell King	select HAVE_KERNEL_LZO
65b1b3f49cSRussell King	select HAVE_KERNEL_XZ
66cb1293e2SArnd Bergmann	select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
679edddaa2SAnanth N Mavinakayanahalli	select HAVE_KRETPROBES if (HAVE_KPROBES)
68b1b3f49cSRussell King	select HAVE_MEMBLOCK
697d485f64SArd Biesheuvel	select HAVE_MOD_ARCH_SPECIFIC
70*42a0bb3fSPetr Mladek	select HAVE_NMI
71b1b3f49cSRussell King	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
720dc016dbSWang Nan	select HAVE_OPTPROBES if !THUMB2_KERNEL
737ada189fSJamie Iles	select HAVE_PERF_EVENTS
7449863894SWill Deacon	select HAVE_PERF_REGS
7549863894SWill Deacon	select HAVE_PERF_USER_STACK_DUMP
76a0ad5496SSteve Capper	select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
77e513f8bfSWill Deacon	select HAVE_REGS_AND_STACK_ACCESS_API
78b1b3f49cSRussell King	select HAVE_SYSCALL_TRACEPOINTS
79af1839ebSCatalin Marinas	select HAVE_UID16
8031c1fc81SKevin Hilman	select HAVE_VIRT_CPU_ACCOUNTING_GEN
81da0ec6f7SThomas Gleixner	select IRQ_FORCED_THREADING
82171b3f0dSRussell King	select MODULES_USE_ELF_REL
8384f452b1SSantosh Shilimkar	select NO_BOOTMEM
84aa7d5f18SArnd Bergmann	select OF_EARLY_FLATTREE if OF
85aa7d5f18SArnd Bergmann	select OF_RESERVED_MEM if OF
86171b3f0dSRussell King	select OLD_SIGACTION
87171b3f0dSRussell King	select OLD_SIGSUSPEND3
88b1b3f49cSRussell King	select PERF_USE_VMALLOC
89b1b3f49cSRussell King	select RTC_LIB
90b1b3f49cSRussell King	select SYS_SUPPORTS_APM_EMULATION
91171b3f0dSRussell King	# Above selects are sorted alphabetically; please add new ones
92171b3f0dSRussell King	# according to that.  Thanks.
931da177e4SLinus Torvalds	help
941da177e4SLinus Torvalds	  The ARM series is a line of low-power-consumption RISC chip designs
95f6c8965aSMartin Michlmayr	  licensed by ARM Ltd and targeted at embedded applications and
961da177e4SLinus Torvalds	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
971da177e4SLinus Torvalds	  manufactured, but legacy ARM-based PC hardware remains popular in
981da177e4SLinus Torvalds	  Europe.  There is an ARM Linux project with a web page at
991da177e4SLinus Torvalds	  <http://www.arm.linux.org.uk/>.
1001da177e4SLinus Torvalds
10174facffeSRussell Kingconfig ARM_HAS_SG_CHAIN
102308c09f1SLaura Abbott	select ARCH_HAS_SG_CHAIN
10374facffeSRussell King	bool
10474facffeSRussell King
1054ce63fcdSMarek Szyprowskiconfig NEED_SG_DMA_LENGTH
1064ce63fcdSMarek Szyprowski	bool
1074ce63fcdSMarek Szyprowski
1084ce63fcdSMarek Szyprowskiconfig ARM_DMA_USE_IOMMU
1094ce63fcdSMarek Szyprowski	bool
110b1b3f49cSRussell King	select ARM_HAS_SG_CHAIN
111b1b3f49cSRussell King	select NEED_SG_DMA_LENGTH
1124ce63fcdSMarek Szyprowski
11360460abfSSeung-Woo Kimif ARM_DMA_USE_IOMMU
11460460abfSSeung-Woo Kim
11560460abfSSeung-Woo Kimconfig ARM_DMA_IOMMU_ALIGNMENT
11660460abfSSeung-Woo Kim	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
11760460abfSSeung-Woo Kim	range 4 9
11860460abfSSeung-Woo Kim	default 8
11960460abfSSeung-Woo Kim	help
12060460abfSSeung-Woo Kim	  DMA mapping framework by default aligns all buffers to the smallest
12160460abfSSeung-Woo Kim	  PAGE_SIZE order which is greater than or equal to the requested buffer
12260460abfSSeung-Woo Kim	  size. This works well for buffers up to a few hundreds kilobytes, but
12360460abfSSeung-Woo Kim	  for larger buffers it just a waste of address space. Drivers which has
12460460abfSSeung-Woo Kim	  relatively small addressing window (like 64Mib) might run out of
12560460abfSSeung-Woo Kim	  virtual space with just a few allocations.
12660460abfSSeung-Woo Kim
12760460abfSSeung-Woo Kim	  With this parameter you can specify the maximum PAGE_SIZE order for
12860460abfSSeung-Woo Kim	  DMA IOMMU buffers. Larger buffers will be aligned only to this
12960460abfSSeung-Woo Kim	  specified order. The order is expressed as a power of two multiplied
13060460abfSSeung-Woo Kim	  by the PAGE_SIZE.
13160460abfSSeung-Woo Kim
13260460abfSSeung-Woo Kimendif
13360460abfSSeung-Woo Kim
1340b05da72SHans Ulli Krollconfig MIGHT_HAVE_PCI
1350b05da72SHans Ulli Kroll	bool
1360b05da72SHans Ulli Kroll
13775e7153aSRalf Baechleconfig SYS_SUPPORTS_APM_EMULATION
13875e7153aSRalf Baechle	bool
13975e7153aSRalf Baechle
140bc581770SLinus Walleijconfig HAVE_TCM
141bc581770SLinus Walleij	bool
142bc581770SLinus Walleij	select GENERIC_ALLOCATOR
143bc581770SLinus Walleij
144e119bfffSRussell Kingconfig HAVE_PROC_CPU
145e119bfffSRussell King	bool
146e119bfffSRussell King
147ce816fa8SUwe Kleine-Königconfig NO_IOPORT_MAP
1485ea81769SAl Viro	bool
1495ea81769SAl Viro
1501da177e4SLinus Torvaldsconfig EISA
1511da177e4SLinus Torvalds	bool
1521da177e4SLinus Torvalds	---help---
1531da177e4SLinus Torvalds	  The Extended Industry Standard Architecture (EISA) bus was
1541da177e4SLinus Torvalds	  developed as an open alternative to the IBM MicroChannel bus.
1551da177e4SLinus Torvalds
1561da177e4SLinus Torvalds	  The EISA bus provided some of the features of the IBM MicroChannel
1571da177e4SLinus Torvalds	  bus while maintaining backward compatibility with cards made for
1581da177e4SLinus Torvalds	  the older ISA bus.  The EISA bus saw limited use between 1988 and
1591da177e4SLinus Torvalds	  1995 when it was made obsolete by the PCI bus.
1601da177e4SLinus Torvalds
1611da177e4SLinus Torvalds	  Say Y here if you are building a kernel for an EISA-based machine.
1621da177e4SLinus Torvalds
1631da177e4SLinus Torvalds	  Otherwise, say N.
1641da177e4SLinus Torvalds
1651da177e4SLinus Torvaldsconfig SBUS
1661da177e4SLinus Torvalds	bool
1671da177e4SLinus Torvalds
168f16fb1ecSRussell Kingconfig STACKTRACE_SUPPORT
169f16fb1ecSRussell King	bool
170f16fb1ecSRussell King	default y
171f16fb1ecSRussell King
172f16fb1ecSRussell Kingconfig LOCKDEP_SUPPORT
173f16fb1ecSRussell King	bool
174f16fb1ecSRussell King	default y
175f16fb1ecSRussell King
1767ad1bcb2SRussell Kingconfig TRACE_IRQFLAGS_SUPPORT
1777ad1bcb2SRussell King	bool
178cb1293e2SArnd Bergmann	default !CPU_V7M
1797ad1bcb2SRussell King
1801da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM
1811da177e4SLinus Torvalds	bool
1828a87411bSWill Deacon	default y
1831da177e4SLinus Torvalds
184f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U32
185f0d1b0b3SDavid Howells	bool
186f0d1b0b3SDavid Howells
187f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U64
188f0d1b0b3SDavid Howells	bool
189f0d1b0b3SDavid Howells
1904a1b5733SEduardo Valentinconfig ARCH_HAS_BANDGAP
1914a1b5733SEduardo Valentin	bool
1924a1b5733SEduardo Valentin
193a5f4c561SStefan Agnerconfig FIX_EARLYCON_MEM
194a5f4c561SStefan Agner	def_bool y if MMU
195a5f4c561SStefan Agner
196b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT
197b89c3b16SAkinobu Mita	bool
198b89c3b16SAkinobu Mita	default y
199b89c3b16SAkinobu Mita
2001da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY
2011da177e4SLinus Torvalds	bool
2021da177e4SLinus Torvalds	default y
2031da177e4SLinus Torvalds
204a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC
205a08b6b79Sviro@ZenIV.linux.org.uk	bool
206a08b6b79Sviro@ZenIV.linux.org.uk
2075ac6da66SChristoph Lameterconfig ZONE_DMA
2085ac6da66SChristoph Lameter	bool
2095ac6da66SChristoph Lameter
210ccd7ab7fSFUJITA Tomonoriconfig NEED_DMA_MAP_STATE
211ccd7ab7fSFUJITA Tomonori       def_bool y
212ccd7ab7fSFUJITA Tomonori
213c7edc9e3SDavid A. Longconfig ARCH_SUPPORTS_UPROBES
214c7edc9e3SDavid A. Long	def_bool y
215c7edc9e3SDavid A. Long
21658af4a24SRob Herringconfig ARCH_HAS_DMA_SET_COHERENT_MASK
21758af4a24SRob Herring	bool
21858af4a24SRob Herring
2191da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA
2201da177e4SLinus Torvalds	bool
2211da177e4SLinus Torvalds
2221da177e4SLinus Torvaldsconfig FIQ
2231da177e4SLinus Torvalds	bool
2241da177e4SLinus Torvalds
22513a5045dSRob Herringconfig NEED_RET_TO_USER
22613a5045dSRob Herring	bool
22713a5045dSRob Herring
228034d2f5aSAl Viroconfig ARCH_MTD_XIP
229034d2f5aSAl Viro	bool
230034d2f5aSAl Viro
231c760fc19SHyok S. Choiconfig VECTORS_BASE
232c760fc19SHyok S. Choi	hex
2336afd6faeSHyok S. Choi	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
234c760fc19SHyok S. Choi	default DRAM_BASE if REMAP_VECTORS_TO_RAM
235c760fc19SHyok S. Choi	default 0x00000000
236c760fc19SHyok S. Choi	help
23719accfd3SRussell King	  The base address of exception vectors.  This must be two pages
23819accfd3SRussell King	  in size.
239c760fc19SHyok S. Choi
240dc21af99SRussell Kingconfig ARM_PATCH_PHYS_VIRT
241c1becedcSRussell King	bool "Patch physical to virtual translations at runtime" if EMBEDDED
242c1becedcSRussell King	default y
243b511d75dSNicolas Pitre	depends on !XIP_KERNEL && MMU
244dc21af99SRussell King	help
245111e9a5cSRussell King	  Patch phys-to-virt and virt-to-phys translation functions at
246111e9a5cSRussell King	  boot and module load time according to the position of the
247111e9a5cSRussell King	  kernel in system memory.
248dc21af99SRussell King
249111e9a5cSRussell King	  This can only be used with non-XIP MMU kernels where the base
250daece596SNicolas Pitre	  of physical memory is at a 16MB boundary.
251dc21af99SRussell King
252c1becedcSRussell King	  Only disable this option if you know that you do not require
253c1becedcSRussell King	  this feature (eg, building a kernel for a single machine) and
254c1becedcSRussell King	  you need to shrink the kernel to the minimal size.
255c1becedcSRussell King
256c334bc15SRob Herringconfig NEED_MACH_IO_H
257c334bc15SRob Herring	bool
258c334bc15SRob Herring	help
259c334bc15SRob Herring	  Select this when mach/io.h is required to provide special
260c334bc15SRob Herring	  definitions for this platform.  The need for mach/io.h should
261c334bc15SRob Herring	  be avoided when possible.
262c334bc15SRob Herring
2630cdc8b92SNicolas Pitreconfig NEED_MACH_MEMORY_H
2641b9f95f8SNicolas Pitre	bool
265111e9a5cSRussell King	help
2660cdc8b92SNicolas Pitre	  Select this when mach/memory.h is required to provide special
2670cdc8b92SNicolas Pitre	  definitions for this platform.  The need for mach/memory.h should
2680cdc8b92SNicolas Pitre	  be avoided when possible.
2691b9f95f8SNicolas Pitre
2701b9f95f8SNicolas Pitreconfig PHYS_OFFSET
271974c0724SNicolas Pitre	hex "Physical address of main memory" if MMU
272c6f54a9bSUwe Kleine-König	depends on !ARM_PATCH_PHYS_VIRT
273974c0724SNicolas Pitre	default DRAM_BASE if !MMU
274c6f54a9bSUwe Kleine-König	default 0x00000000 if ARCH_EBSA110 || \
275c6f54a9bSUwe Kleine-König			ARCH_FOOTBRIDGE || \
276c6f54a9bSUwe Kleine-König			ARCH_INTEGRATOR || \
277c6f54a9bSUwe Kleine-König			ARCH_IOP13XX || \
278c6f54a9bSUwe Kleine-König			ARCH_KS8695 || \
279c6f54a9bSUwe Kleine-König			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
280c6f54a9bSUwe Kleine-König	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
281c6f54a9bSUwe Kleine-König	default 0x20000000 if ARCH_S5PV210
282c6f54a9bSUwe Kleine-König	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
283b8824c9aSH Hartley Sweeten	default 0xc0000000 if ARCH_SA1100
2841b9f95f8SNicolas Pitre	help
2851b9f95f8SNicolas Pitre	  Please provide the physical address corresponding to the
2861b9f95f8SNicolas Pitre	  location of main memory in your system.
287cada3c08SRussell King
28887e040b6SSimon Glassconfig GENERIC_BUG
28987e040b6SSimon Glass	def_bool y
29087e040b6SSimon Glass	depends on BUG
29187e040b6SSimon Glass
2921bcad26eSKirill A. Shutemovconfig PGTABLE_LEVELS
2931bcad26eSKirill A. Shutemov	int
2941bcad26eSKirill A. Shutemov	default 3 if ARM_LPAE
2951bcad26eSKirill A. Shutemov	default 2
2961bcad26eSKirill A. Shutemov
2971da177e4SLinus Torvaldssource "init/Kconfig"
2981da177e4SLinus Torvalds
299dc52ddc0SMatt Helsleysource "kernel/Kconfig.freezer"
300dc52ddc0SMatt Helsley
3011da177e4SLinus Torvaldsmenu "System Type"
3021da177e4SLinus Torvalds
3033c427975SHyok S. Choiconfig MMU
3043c427975SHyok S. Choi	bool "MMU-based Paged Memory Management Support"
3053c427975SHyok S. Choi	default y
3063c427975SHyok S. Choi	help
3073c427975SHyok S. Choi	  Select if you want MMU-based virtualised addressing space
3083c427975SHyok S. Choi	  support by paged memory management. If unsure, say 'Y'.
3093c427975SHyok S. Choi
310e0c25d95SDaniel Cashmanconfig ARCH_MMAP_RND_BITS_MIN
311e0c25d95SDaniel Cashman	default 8
312e0c25d95SDaniel Cashman
313e0c25d95SDaniel Cashmanconfig ARCH_MMAP_RND_BITS_MAX
314e0c25d95SDaniel Cashman	default 14 if PAGE_OFFSET=0x40000000
315e0c25d95SDaniel Cashman	default 15 if PAGE_OFFSET=0x80000000
316e0c25d95SDaniel Cashman	default 16
317e0c25d95SDaniel Cashman
318ccf50e23SRussell King#
319ccf50e23SRussell King# The "ARM system type" choice list is ordered alphabetically by option
320ccf50e23SRussell King# text.  Please add new entries in the option alphabetic order.
321ccf50e23SRussell King#
3221da177e4SLinus Torvaldschoice
3231da177e4SLinus Torvalds	prompt "ARM system type"
32470722803SArnd Bergmann	default ARM_SINGLE_ARMV7M if !MMU
3251420b22bSArnd Bergmann	default ARCH_MULTIPLATFORM if MMU
3261da177e4SLinus Torvalds
327387798b3SRob Herringconfig ARCH_MULTIPLATFORM
328387798b3SRob Herring	bool "Allow multiple platforms to be selected"
329b1b3f49cSRussell King	depends on MMU
330ddb902ccSRob Herring	select ARCH_WANT_OPTIONAL_GPIOLIB
33142dc836dSOlof Johansson	select ARM_HAS_SG_CHAIN
332387798b3SRob Herring	select ARM_PATCH_PHYS_VIRT
333387798b3SRob Herring	select AUTO_ZRELADDR
3346d0add40SRob Herring	select CLKSRC_OF
33566314223SDinh Nguyen	select COMMON_CLK
336ddb902ccSRob Herring	select GENERIC_CLOCKEVENTS
33708d38bebSWill Deacon	select MIGHT_HAVE_PCI
338387798b3SRob Herring	select MULTI_IRQ_HANDLER
33966314223SDinh Nguyen	select SPARSE_IRQ
34066314223SDinh Nguyen	select USE_OF
34166314223SDinh Nguyen
3429c77bc43SStefan Agnerconfig ARM_SINGLE_ARMV7M
3439c77bc43SStefan Agner	bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
3449c77bc43SStefan Agner	depends on !MMU
3459c77bc43SStefan Agner	select ARCH_WANT_OPTIONAL_GPIOLIB
3469c77bc43SStefan Agner	select ARM_NVIC
347499f1640SStefan Agner	select AUTO_ZRELADDR
3489c77bc43SStefan Agner	select CLKSRC_OF
3499c77bc43SStefan Agner	select COMMON_CLK
3509c77bc43SStefan Agner	select CPU_V7M
3519c77bc43SStefan Agner	select GENERIC_CLOCKEVENTS
3529c77bc43SStefan Agner	select NO_IOPORT_MAP
3539c77bc43SStefan Agner	select SPARSE_IRQ
3549c77bc43SStefan Agner	select USE_OF
3559c77bc43SStefan Agner
3564af6fee1SDeepak Saxena
35793e22567SRussell Kingconfig ARCH_CLPS711X
35893e22567SRussell King	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
359a3b8d4a5SAlexander Shiyan	select ARCH_REQUIRE_GPIOLIB
360ea7d1bc9SAlexander Shiyan	select AUTO_ZRELADDR
361c99f72adSAlexander Shiyan	select CLKSRC_MMIO
36293e22567SRussell King	select COMMON_CLK
36393e22567SRussell King	select CPU_ARM720T
3644a8355c4SAlexander Shiyan	select GENERIC_CLOCKEVENTS
3656597619fSAlexander Shiyan	select MFD_SYSCON
366e4e3a37dSAlexander Shiyan	select SOC_BUS
36793e22567SRussell King	help
36893e22567SRussell King	  Support for Cirrus Logic 711x/721x/731x based boards.
36993e22567SRussell King
370788c9700SRussell Kingconfig ARCH_GEMINI
371788c9700SRussell King	bool "Cortina Systems Gemini"
372788c9700SRussell King	select ARCH_REQUIRE_GPIOLIB
373f3372c01SLinus Walleij	select CLKSRC_MMIO
374b1b3f49cSRussell King	select CPU_FA526
375f3372c01SLinus Walleij	select GENERIC_CLOCKEVENTS
376788c9700SRussell King	help
377788c9700SRussell King	  Support for the Cortina Systems Gemini family SoCs
378788c9700SRussell King
3791da177e4SLinus Torvaldsconfig ARCH_EBSA110
3801da177e4SLinus Torvalds	bool "EBSA-110"
381b1b3f49cSRussell King	select ARCH_USES_GETTIMEOFFSET
382c750815eSRussell King	select CPU_SA110
383f7e68bbfSRussell King	select ISA
384c334bc15SRob Herring	select NEED_MACH_IO_H
3850cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
386ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
3871da177e4SLinus Torvalds	help
3881da177e4SLinus Torvalds	  This is an evaluation board for the StrongARM processor available
389f6c8965aSMartin Michlmayr	  from Digital. It has limited hardware on-board, including an
3901da177e4SLinus Torvalds	  Ethernet interface, two PCMCIA sockets, two serial ports and a
3911da177e4SLinus Torvalds	  parallel port.
3921da177e4SLinus Torvalds
393e7736d47SLennert Buytenhekconfig ARCH_EP93XX
394e7736d47SLennert Buytenhek	bool "EP93xx-based"
395b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
396b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
397e7736d47SLennert Buytenhek	select ARM_AMBA
398b8824c9aSH Hartley Sweeten	select ARM_PATCH_PHYS_VIRT
399e7736d47SLennert Buytenhek	select ARM_VIC
400b8824c9aSH Hartley Sweeten	select AUTO_ZRELADDR
4016d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
402000bc178SLinus Walleij	select CLKSRC_MMIO
403b1b3f49cSRussell King	select CPU_ARM920T
404000bc178SLinus Walleij	select GENERIC_CLOCKEVENTS
405e7736d47SLennert Buytenhek	help
406e7736d47SLennert Buytenhek	  This enables support for the Cirrus EP93xx series of CPUs.
407e7736d47SLennert Buytenhek
4081da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE
4091da177e4SLinus Torvalds	bool "FootBridge"
410c750815eSRussell King	select CPU_SA110
4111da177e4SLinus Torvalds	select FOOTBRIDGE
4124e8d7637SRussell King	select GENERIC_CLOCKEVENTS
413d0ee9f40SArnd Bergmann	select HAVE_IDE
4148ef6e620SRob Herring	select NEED_MACH_IO_H if !MMU
4150cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
416f999b8bdSMartin Michlmayr	help
417f999b8bdSMartin Michlmayr	  Support for systems based on the DC21285 companion chip
418f999b8bdSMartin Michlmayr	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
4191da177e4SLinus Torvalds
4204af6fee1SDeepak Saxenaconfig ARCH_NETX
4214af6fee1SDeepak Saxena	bool "Hilscher NetX based"
422b1b3f49cSRussell King	select ARM_VIC
423234b6cedSRussell King	select CLKSRC_MMIO
424c750815eSRussell King	select CPU_ARM926T
4252fcfe6b8SUwe Kleine-König	select GENERIC_CLOCKEVENTS
426f999b8bdSMartin Michlmayr	help
4274af6fee1SDeepak Saxena	  This enables support for systems based on the Hilscher NetX Soc
4284af6fee1SDeepak Saxena
4293b938be6SRussell Kingconfig ARCH_IOP13XX
4303b938be6SRussell King	bool "IOP13xx-based"
4313b938be6SRussell King	depends on MMU
432b1b3f49cSRussell King	select CPU_XSC3
4330cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
43413a5045dSRob Herring	select NEED_RET_TO_USER
435b1b3f49cSRussell King	select PCI
436b1b3f49cSRussell King	select PLAT_IOP
437b1b3f49cSRussell King	select VMSPLIT_1G
43837ebbcffSThomas Gleixner	select SPARSE_IRQ
4393b938be6SRussell King	help
4403b938be6SRussell King	  Support for Intel's IOP13XX (XScale) family of processors.
4413b938be6SRussell King
4423f7e5815SLennert Buytenhekconfig ARCH_IOP32X
4433f7e5815SLennert Buytenhek	bool "IOP32x-based"
444a4f7e763SRussell King	depends on MMU
445b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
446c750815eSRussell King	select CPU_XSCALE
447e9004f50SLinus Walleij	select GPIO_IOP
44813a5045dSRob Herring	select NEED_RET_TO_USER
449f7e68bbfSRussell King	select PCI
450b1b3f49cSRussell King	select PLAT_IOP
451f999b8bdSMartin Michlmayr	help
4523f7e5815SLennert Buytenhek	  Support for Intel's 80219 and IOP32X (XScale) family of
4533f7e5815SLennert Buytenhek	  processors.
4543f7e5815SLennert Buytenhek
4553f7e5815SLennert Buytenhekconfig ARCH_IOP33X
4563f7e5815SLennert Buytenhek	bool "IOP33x-based"
4573f7e5815SLennert Buytenhek	depends on MMU
458b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
459c750815eSRussell King	select CPU_XSCALE
460e9004f50SLinus Walleij	select GPIO_IOP
46113a5045dSRob Herring	select NEED_RET_TO_USER
4623f7e5815SLennert Buytenhek	select PCI
463b1b3f49cSRussell King	select PLAT_IOP
4643f7e5815SLennert Buytenhek	help
4653f7e5815SLennert Buytenhek	  Support for Intel's IOP33X (XScale) family of processors.
4661da177e4SLinus Torvalds
4673b938be6SRussell Kingconfig ARCH_IXP4XX
4683b938be6SRussell King	bool "IXP4xx-based"
469a4f7e763SRussell King	depends on MMU
47058af4a24SRob Herring	select ARCH_HAS_DMA_SET_COHERENT_MASK
471b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
47251aaf81fSRussell King	select ARCH_SUPPORTS_BIG_ENDIAN
473234b6cedSRussell King	select CLKSRC_MMIO
474c750815eSRussell King	select CPU_XSCALE
475b1b3f49cSRussell King	select DMABOUNCE if PCI
4763b938be6SRussell King	select GENERIC_CLOCKEVENTS
4770b05da72SHans Ulli Kroll	select MIGHT_HAVE_PCI
478c334bc15SRob Herring	select NEED_MACH_IO_H
4799296d94dSFlorian Fainelli	select USB_EHCI_BIG_ENDIAN_DESC
480171b3f0dSRussell King	select USB_EHCI_BIG_ENDIAN_MMIO
481c4713074SLennert Buytenhek	help
4823b938be6SRussell King	  Support for Intel's IXP4XX (XScale) family of processors.
483c4713074SLennert Buytenhek
484edabd38eSSaeed Bisharaconfig ARCH_DOVE
485edabd38eSSaeed Bishara	bool "Marvell Dove"
486edabd38eSSaeed Bishara	select ARCH_REQUIRE_GPIOLIB
487756b2531SSebastian Hesselbarth	select CPU_PJ4
488edabd38eSSaeed Bishara	select GENERIC_CLOCKEVENTS
4890f81bd43SRussell King	select MIGHT_HAVE_PCI
490b8cd337cSArnd Bergmann	select MULTI_IRQ_HANDLER
491171b3f0dSRussell King	select MVEBU_MBUS
4929139acd1SSebastian Hesselbarth	select PINCTRL
4939139acd1SSebastian Hesselbarth	select PINCTRL_DOVE
494abcda1dcSThomas Petazzoni	select PLAT_ORION_LEGACY
4955cdbe5d2SArnd Bergmann	select SPARSE_IRQ
496c5d431e8SRussell King	select PM_GENERIC_DOMAINS if PM
497edabd38eSSaeed Bishara	help
498edabd38eSSaeed Bishara	  Support for the Marvell Dove SoC 88AP510
499edabd38eSSaeed Bishara
500c53c9cf6SAndrew Victorconfig ARCH_KS8695
501c53c9cf6SAndrew Victor	bool "Micrel/Kendin KS8695"
50272880ad8SDaniel Silverstone	select ARCH_REQUIRE_GPIOLIB
503c7e783d6SLinus Walleij	select CLKSRC_MMIO
504b1b3f49cSRussell King	select CPU_ARM922T
505c7e783d6SLinus Walleij	select GENERIC_CLOCKEVENTS
506b1b3f49cSRussell King	select NEED_MACH_MEMORY_H
507c53c9cf6SAndrew Victor	help
508c53c9cf6SAndrew Victor	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
509c53c9cf6SAndrew Victor	  System-on-Chip devices.
510c53c9cf6SAndrew Victor
511788c9700SRussell Kingconfig ARCH_W90X900
512788c9700SRussell King	bool "Nuvoton W90X900 CPU"
513c52d3d68Swanzongshun	select ARCH_REQUIRE_GPIOLIB
5146d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
5156fa5d5f7SRussell King	select CLKSRC_MMIO
516b1b3f49cSRussell King	select CPU_ARM926T
51758b5369eSwanzongshun	select GENERIC_CLOCKEVENTS
518777f9bebSLennert Buytenhek	help
519a8bc4eadSwanzongshun	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
520a8bc4eadSwanzongshun	  At present, the w90x900 has been renamed nuc900, regarding
521a8bc4eadSwanzongshun	  the ARM series product line, you can login the following
522a8bc4eadSwanzongshun	  link address to know more.
523a8bc4eadSwanzongshun
524a8bc4eadSwanzongshun	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
525a8bc4eadSwanzongshun		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
526585cf175STzachi Perelstein
52793e22567SRussell Kingconfig ARCH_LPC32XX
52893e22567SRussell King	bool "NXP LPC32XX"
52993e22567SRussell King	select ARCH_REQUIRE_GPIOLIB
53093e22567SRussell King	select ARM_AMBA
5314073723aSRussell King	select CLKDEV_LOOKUP
532c227f127SVladimir Zapolskiy	select CLKSRC_LPC32XX
533c227f127SVladimir Zapolskiy	select COMMON_CLK
53493e22567SRussell King	select CPU_ARM926T
53593e22567SRussell King	select GENERIC_CLOCKEVENTS
5368cb17b5eSVladimir Zapolskiy	select MULTI_IRQ_HANDLER
5378cb17b5eSVladimir Zapolskiy	select SPARSE_IRQ
53893e22567SRussell King	select USE_OF
53993e22567SRussell King	help
54093e22567SRussell King	  Support for the NXP LPC32XX family of processors
54193e22567SRussell King
5421da177e4SLinus Torvaldsconfig ARCH_PXA
5432c8086a5Seric miao	bool "PXA2xx/PXA3xx-based"
544a4f7e763SRussell King	depends on MMU
545b1b3f49cSRussell King	select ARCH_MTD_XIP
546b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
547b1b3f49cSRussell King	select ARM_CPU_SUSPEND if PM
548b1b3f49cSRussell King	select AUTO_ZRELADDR
549a1c0a6adSRobert Jarzmik	select COMMON_CLK
5506d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
551389d9b58SDaniel Lezcano	select CLKSRC_PXA
552234b6cedSRussell King	select CLKSRC_MMIO
5536f6caeaaSRobert Jarzmik	select CLKSRC_OF
5542f202861SArnd Bergmann	select CPU_XSCALE if !CPU_XSC3
555981d0f39SEric Miao	select GENERIC_CLOCKEVENTS
556157d2644SHaojian Zhuang	select GPIO_PXA
557b1b3f49cSRussell King	select HAVE_IDE
558d6cf30caSRobert Jarzmik	select IRQ_DOMAIN
559b1b3f49cSRussell King	select MULTI_IRQ_HANDLER
560bd5ce433SEric Miao	select PLAT_PXA
5616ac6b817SHaojian Zhuang	select SPARSE_IRQ
562f999b8bdSMartin Michlmayr	help
5632c8086a5Seric miao	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
5641da177e4SLinus Torvalds
5651da177e4SLinus Torvaldsconfig ARCH_RPC
5661da177e4SLinus Torvalds	bool "RiscPC"
567868e87ccSRussell King	depends on MMU
5681da177e4SLinus Torvalds	select ARCH_ACORN
569a08b6b79Sviro@ZenIV.linux.org.uk	select ARCH_MAY_HAVE_PC_FDC
57007f841b7SRussell King	select ARCH_SPARSEMEM_ENABLE
5715cfc8ee0SJohn Stultz	select ARCH_USES_GETTIMEOFFSET
572fa04e209SArnd Bergmann	select CPU_SA110
573b1b3f49cSRussell King	select FIQ
574d0ee9f40SArnd Bergmann	select HAVE_IDE
575b1b3f49cSRussell King	select HAVE_PATA_PLATFORM
576b1b3f49cSRussell King	select ISA_DMA_API
577c334bc15SRob Herring	select NEED_MACH_IO_H
5780cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
579ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
5801da177e4SLinus Torvalds	help
5811da177e4SLinus Torvalds	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
5821da177e4SLinus Torvalds	  CD-ROM interface, serial and parallel port, and the floppy drive.
5831da177e4SLinus Torvalds
5841da177e4SLinus Torvaldsconfig ARCH_SA1100
5851da177e4SLinus Torvalds	bool "SA1100-based"
586b1b3f49cSRussell King	select ARCH_MTD_XIP
5877444a72eSMichael Buesch	select ARCH_REQUIRE_GPIOLIB
588b1b3f49cSRussell King	select ARCH_SPARSEMEM_ENABLE
589b1b3f49cSRussell King	select CLKDEV_LOOKUP
590b1b3f49cSRussell King	select CLKSRC_MMIO
591389d9b58SDaniel Lezcano	select CLKSRC_PXA
592389d9b58SDaniel Lezcano	select CLKSRC_OF if OF
593b1b3f49cSRussell King	select CPU_FREQ
594b1b3f49cSRussell King	select CPU_SA1100
595b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
596d0ee9f40SArnd Bergmann	select HAVE_IDE
5971eca42b4SDmitry Eremin-Solenikov	select IRQ_DOMAIN
598b1b3f49cSRussell King	select ISA
599affcab32SDmitry Eremin-Solenikov	select MULTI_IRQ_HANDLER
6000cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
601375dec92SRussell King	select SPARSE_IRQ
602f999b8bdSMartin Michlmayr	help
603f999b8bdSMartin Michlmayr	  Support for StrongARM 11x0 based boards.
6041da177e4SLinus Torvalds
605b130d5c2SKukjin Kimconfig ARCH_S3C24XX
606b130d5c2SKukjin Kim	bool "Samsung S3C24XX SoCs"
60753650430SKukjin Kim	select ARCH_REQUIRE_GPIOLIB
608335cce74SArnd Bergmann	select ATAGS
609b1b3f49cSRussell King	select CLKDEV_LOOKUP
6104280506aSTomasz Figa	select CLKSRC_SAMSUNG_PWM
6117f78b6ebSRomain Naour	select GENERIC_CLOCKEVENTS
612880cf071STomasz Figa	select GPIO_SAMSUNG
61320676c15SKukjin Kim	select HAVE_S3C2410_I2C if I2C
614b130d5c2SKukjin Kim	select HAVE_S3C2410_WATCHDOG if WATCHDOG
615b1b3f49cSRussell King	select HAVE_S3C_RTC if RTC_CLASS
61617453dd2SHeiko Stuebner	select MULTI_IRQ_HANDLER
617c334bc15SRob Herring	select NEED_MACH_IO_H
618cd8dc7aeSTomasz Figa	select SAMSUNG_ATAGS
6191da177e4SLinus Torvalds	help
620b130d5c2SKukjin Kim	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
621b130d5c2SKukjin Kim	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
622b130d5c2SKukjin Kim	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
623b130d5c2SKukjin Kim	  Samsung SMDK2410 development board (and derivatives).
62463b1f51bSBen Dooks
6257c6337e2SKevin Hilmanconfig ARCH_DAVINCI
6267c6337e2SKevin Hilman	bool "TI DaVinci"
627b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
628dce1115bSDavid Brownell	select ARCH_REQUIRE_GPIOLIB
6296d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
630ce32c5c5SArnd Bergmann	select CPU_ARM926T
63120e9969bSDavid Brownell	select GENERIC_ALLOCATOR
632b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
633dc7ad3b3SRussell King	select GENERIC_IRQ_CHIP
634b1b3f49cSRussell King	select HAVE_IDE
635689e331fSSekhar Nori	select USE_OF
636b1b3f49cSRussell King	select ZONE_DMA
6377c6337e2SKevin Hilman	help
6387c6337e2SKevin Hilman	  Support for TI's DaVinci platform.
6397c6337e2SKevin Hilman
640a0694861STony Lindgrenconfig ARCH_OMAP1
641a0694861STony Lindgren	bool "TI OMAP1"
64200a36698SArnd Bergmann	depends on MMU
643b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
644a0694861STony Lindgren	select ARCH_OMAP
64521f47fbcSAlexey Charkov	select ARCH_REQUIRE_GPIOLIB
646e9a91de7STony Prisk	select CLKDEV_LOOKUP
647cee37e50Sviresh kumar	select CLKSRC_MMIO
648b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
649a0694861STony Lindgren	select GENERIC_IRQ_CHIP
650a0694861STony Lindgren	select HAVE_IDE
651a0694861STony Lindgren	select IRQ_DOMAIN
652b694331cSTony Lindgren	select MULTI_IRQ_HANDLER
653a0694861STony Lindgren	select NEED_MACH_IO_H if PCCARD
654a0694861STony Lindgren	select NEED_MACH_MEMORY_H
655685e2d08STony Lindgren	select SPARSE_IRQ
65621f47fbcSAlexey Charkov	help
657a0694861STony Lindgren	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
65802c981c0SBinghua Duan
6591da177e4SLinus Torvaldsendchoice
6601da177e4SLinus Torvalds
661387798b3SRob Herringmenu "Multiple platform selection"
662387798b3SRob Herring	depends on ARCH_MULTIPLATFORM
663387798b3SRob Herring
664387798b3SRob Herringcomment "CPU Core family selection"
665387798b3SRob Herring
666f8afae40SArnd Bergmannconfig ARCH_MULTI_V4
667f8afae40SArnd Bergmann	bool "ARMv4 based platforms (FA526)"
668f8afae40SArnd Bergmann	depends on !ARCH_MULTI_V6_V7
669f8afae40SArnd Bergmann	select ARCH_MULTI_V4_V5
670f8afae40SArnd Bergmann	select CPU_FA526
671f8afae40SArnd Bergmann
672387798b3SRob Herringconfig ARCH_MULTI_V4T
673387798b3SRob Herring	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
674387798b3SRob Herring	depends on !ARCH_MULTI_V6_V7
675b1b3f49cSRussell King	select ARCH_MULTI_V4_V5
67624e860fbSArnd Bergmann	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
67724e860fbSArnd Bergmann		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
67824e860fbSArnd Bergmann		CPU_ARM925T || CPU_ARM940T)
679387798b3SRob Herring
680387798b3SRob Herringconfig ARCH_MULTI_V5
681387798b3SRob Herring	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
682387798b3SRob Herring	depends on !ARCH_MULTI_V6_V7
683b1b3f49cSRussell King	select ARCH_MULTI_V4_V5
68412567bbdSAndrew Lunn	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
68524e860fbSArnd Bergmann		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
68624e860fbSArnd Bergmann		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
687387798b3SRob Herring
688387798b3SRob Herringconfig ARCH_MULTI_V4_V5
689387798b3SRob Herring	bool
690387798b3SRob Herring
691387798b3SRob Herringconfig ARCH_MULTI_V6
6928dda05ccSStephen Boyd	bool "ARMv6 based platforms (ARM11)"
693387798b3SRob Herring	select ARCH_MULTI_V6_V7
69442f4754aSRob Herring	select CPU_V6K
695387798b3SRob Herring
696387798b3SRob Herringconfig ARCH_MULTI_V7
6978dda05ccSStephen Boyd	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
698387798b3SRob Herring	default y
699387798b3SRob Herring	select ARCH_MULTI_V6_V7
700b1b3f49cSRussell King	select CPU_V7
70190bc8ac7SRob Herring	select HAVE_SMP
702387798b3SRob Herring
703387798b3SRob Herringconfig ARCH_MULTI_V6_V7
704387798b3SRob Herring	bool
7059352b05bSRob Herring	select MIGHT_HAVE_CACHE_L2X0
706387798b3SRob Herring
707387798b3SRob Herringconfig ARCH_MULTI_CPU_AUTO
708387798b3SRob Herring	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
709387798b3SRob Herring	select ARCH_MULTI_V5
710387798b3SRob Herring
711387798b3SRob Herringendmenu
712387798b3SRob Herring
71305e2a3deSRob Herringconfig ARCH_VIRT
714e3246542SMasahiro Yamada	bool "Dummy Virtual Machine"
715e3246542SMasahiro Yamada	depends on ARCH_MULTI_V7
7164b8b5f25SRob Herring	select ARM_AMBA
71705e2a3deSRob Herring	select ARM_GIC
7180e2f91e9SPavel Fedin	select ARM_GIC_V2M if PCI_MSI
7190b28f1dbSJean-Philippe Brucker	select ARM_GIC_V3
72005e2a3deSRob Herring	select ARM_PSCI
7214b8b5f25SRob Herring	select HAVE_ARM_ARCH_TIMER
72205e2a3deSRob Herring
723ccf50e23SRussell King#
724ccf50e23SRussell King# This is sorted alphabetically by mach-* pathname.  However, plat-*
725ccf50e23SRussell King# Kconfigs may be included either alphabetically (according to the
726ccf50e23SRussell King# plat- suffix) or along side the corresponding mach-* source.
727ccf50e23SRussell King#
7283e93a22bSGregory CLEMENTsource "arch/arm/mach-mvebu/Kconfig"
7293e93a22bSGregory CLEMENT
730445d9b30STsahee Zidenbergsource "arch/arm/mach-alpine/Kconfig"
731445d9b30STsahee Zidenberg
732590b460cSLars Perssonsource "arch/arm/mach-artpec/Kconfig"
733590b460cSLars Persson
734d9bfc86dSOleksij Rempelsource "arch/arm/mach-asm9260/Kconfig"
735d9bfc86dSOleksij Rempel
73695b8f20fSRussell Kingsource "arch/arm/mach-at91/Kconfig"
73795b8f20fSRussell King
7381d22924eSAnders Bergsource "arch/arm/mach-axxia/Kconfig"
7391d22924eSAnders Berg
7408ac49e04SChristian Daudtsource "arch/arm/mach-bcm/Kconfig"
7418ac49e04SChristian Daudt
7421c37fa10SSebastian Hesselbarthsource "arch/arm/mach-berlin/Kconfig"
7431c37fa10SSebastian Hesselbarth
7441da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig"
7451da177e4SLinus Torvalds
746d94f944eSAnton Vorontsovsource "arch/arm/mach-cns3xxx/Kconfig"
747d94f944eSAnton Vorontsov
74895b8f20fSRussell Kingsource "arch/arm/mach-davinci/Kconfig"
74995b8f20fSRussell King
750df8d742eSBaruch Siachsource "arch/arm/mach-digicolor/Kconfig"
751df8d742eSBaruch Siach
75295b8f20fSRussell Kingsource "arch/arm/mach-dove/Kconfig"
75395b8f20fSRussell King
754e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig"
755e7736d47SLennert Buytenhek
7561da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig"
7571da177e4SLinus Torvalds
75859d3a193SPaulius Zaleckassource "arch/arm/mach-gemini/Kconfig"
75959d3a193SPaulius Zaleckas
760387798b3SRob Herringsource "arch/arm/mach-highbank/Kconfig"
761387798b3SRob Herring
762389ee0c2SHaojian Zhuangsource "arch/arm/mach-hisi/Kconfig"
763389ee0c2SHaojian Zhuang
7641da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig"
7651da177e4SLinus Torvalds
7663f7e5815SLennert Buytenheksource "arch/arm/mach-iop32x/Kconfig"
7673f7e5815SLennert Buytenhek
7683f7e5815SLennert Buytenheksource "arch/arm/mach-iop33x/Kconfig"
7691da177e4SLinus Torvalds
770285f5fa7SDan Williamssource "arch/arm/mach-iop13xx/Kconfig"
771285f5fa7SDan Williams
7721da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig"
7731da177e4SLinus Torvalds
774828989adSSantosh Shilimkarsource "arch/arm/mach-keystone/Kconfig"
775828989adSSantosh Shilimkar
77695b8f20fSRussell Kingsource "arch/arm/mach-ks8695/Kconfig"
77795b8f20fSRussell King
7783b8f5030SCarlo Caionesource "arch/arm/mach-meson/Kconfig"
7793b8f5030SCarlo Caione
78017723fd3SJonas Jensensource "arch/arm/mach-moxart/Kconfig"
78117723fd3SJonas Jensen
7828c2ed9bcSJoel Stanleysource "arch/arm/mach-aspeed/Kconfig"
7838c2ed9bcSJoel Stanley
784794d15b2SStanislav Samsonovsource "arch/arm/mach-mv78xx0/Kconfig"
785794d15b2SStanislav Samsonov
7863995eb82SShawn Guosource "arch/arm/mach-imx/Kconfig"
7871da177e4SLinus Torvalds
788f682a218SMatthias Bruggersource "arch/arm/mach-mediatek/Kconfig"
789f682a218SMatthias Brugger
7901d3f33d5SShawn Guosource "arch/arm/mach-mxs/Kconfig"
7911d3f33d5SShawn Guo
79295b8f20fSRussell Kingsource "arch/arm/mach-netx/Kconfig"
79349cbe786SEric Miao
79495b8f20fSRussell Kingsource "arch/arm/mach-nomadik/Kconfig"
79595b8f20fSRussell King
7969851ca57SDaniel Tangsource "arch/arm/mach-nspire/Kconfig"
7979851ca57SDaniel Tang
798d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig"
799d48af15eSTony Lindgren
800d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig"
8011da177e4SLinus Torvalds
8021dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig"
8031dbae815STony Lindgren
8049dd0b194SLennert Buytenheksource "arch/arm/mach-orion5x/Kconfig"
805585cf175STzachi Perelstein
806387798b3SRob Herringsource "arch/arm/mach-picoxcell/Kconfig"
807387798b3SRob Herring
80895b8f20fSRussell Kingsource "arch/arm/mach-pxa/Kconfig"
80995b8f20fSRussell Kingsource "arch/arm/plat-pxa/Kconfig"
8101da177e4SLinus Torvalds
81195b8f20fSRussell Kingsource "arch/arm/mach-mmp/Kconfig"
81295b8f20fSRussell King
8138c9184b7SNeil Armstrongsource "arch/arm/mach-oxnas/Kconfig"
8148c9184b7SNeil Armstrong
8158fc1b0f8SKumar Galasource "arch/arm/mach-qcom/Kconfig"
8168fc1b0f8SKumar Gala
81795b8f20fSRussell Kingsource "arch/arm/mach-realview/Kconfig"
81895b8f20fSRussell King
819d63dc051SHeiko Stuebnersource "arch/arm/mach-rockchip/Kconfig"
820d63dc051SHeiko Stuebner
82195b8f20fSRussell Kingsource "arch/arm/mach-sa1100/Kconfig"
822edabd38eSSaeed Bishara
823387798b3SRob Herringsource "arch/arm/mach-socfpga/Kconfig"
824387798b3SRob Herring
825a7ed099fSArnd Bergmannsource "arch/arm/mach-spear/Kconfig"
826a21765a7SBen Dooks
82765ebcc11SSrinivas Kandagatlasource "arch/arm/mach-sti/Kconfig"
82865ebcc11SSrinivas Kandagatla
82985fd6d63SKukjin Kimsource "arch/arm/mach-s3c24xx/Kconfig"
8301da177e4SLinus Torvalds
831431107eaSBen Dookssource "arch/arm/mach-s3c64xx/Kconfig"
832a08ab637SBen Dooks
833170f4e42SKukjin Kimsource "arch/arm/mach-s5pv210/Kconfig"
834170f4e42SKukjin Kim
83583014579SKukjin Kimsource "arch/arm/mach-exynos/Kconfig"
836e509b289SRob Herringsource "arch/arm/plat-samsung/Kconfig"
837cc0e72b8SChanghwan Youn
838882d01f9SRussell Kingsource "arch/arm/mach-shmobile/Kconfig"
8391da177e4SLinus Torvalds
8403b52634fSMaxime Ripardsource "arch/arm/mach-sunxi/Kconfig"
8413b52634fSMaxime Ripard
842156a0997SBarry Songsource "arch/arm/mach-prima2/Kconfig"
843156a0997SBarry Song
844d6de5b02SMarc Gonzalezsource "arch/arm/mach-tango/Kconfig"
845d6de5b02SMarc Gonzalez
846c5f80065SErik Gillingsource "arch/arm/mach-tegra/Kconfig"
847c5f80065SErik Gilling
84895b8f20fSRussell Kingsource "arch/arm/mach-u300/Kconfig"
8491da177e4SLinus Torvalds
850ba56a987SMasahiro Yamadasource "arch/arm/mach-uniphier/Kconfig"
851ba56a987SMasahiro Yamada
85295b8f20fSRussell Kingsource "arch/arm/mach-ux500/Kconfig"
8531da177e4SLinus Torvalds
8541da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig"
8551da177e4SLinus Torvalds
856ceade897SRussell Kingsource "arch/arm/mach-vexpress/Kconfig"
857420c34e4SRussell Kingsource "arch/arm/plat-versatile/Kconfig"
858ceade897SRussell King
8596f35f9a9STony Prisksource "arch/arm/mach-vt8500/Kconfig"
8606f35f9a9STony Prisk
8617ec80ddfSwanzongshunsource "arch/arm/mach-w90x900/Kconfig"
8627ec80ddfSwanzongshun
863acede515SJun Niesource "arch/arm/mach-zx/Kconfig"
864acede515SJun Nie
8659a45eb69SJosh Cartwrightsource "arch/arm/mach-zynq/Kconfig"
8669a45eb69SJosh Cartwright
867499f1640SStefan Agner# ARMv7-M architecture
868499f1640SStefan Agnerconfig ARCH_EFM32
869499f1640SStefan Agner	bool "Energy Micro efm32"
870499f1640SStefan Agner	depends on ARM_SINGLE_ARMV7M
871499f1640SStefan Agner	select ARCH_REQUIRE_GPIOLIB
872499f1640SStefan Agner	help
873499f1640SStefan Agner	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
874499f1640SStefan Agner	  processors.
875499f1640SStefan Agner
876499f1640SStefan Agnerconfig ARCH_LPC18XX
877499f1640SStefan Agner	bool "NXP LPC18xx/LPC43xx"
878499f1640SStefan Agner	depends on ARM_SINGLE_ARMV7M
879499f1640SStefan Agner	select ARCH_HAS_RESET_CONTROLLER
880499f1640SStefan Agner	select ARM_AMBA
881499f1640SStefan Agner	select CLKSRC_LPC32XX
882499f1640SStefan Agner	select PINCTRL
883499f1640SStefan Agner	help
884499f1640SStefan Agner	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
885499f1640SStefan Agner	  high performance microcontrollers.
886499f1640SStefan Agner
887499f1640SStefan Agnerconfig ARCH_STM32
888499f1640SStefan Agner	bool "STMicrolectronics STM32"
889499f1640SStefan Agner	depends on ARM_SINGLE_ARMV7M
890499f1640SStefan Agner	select ARCH_HAS_RESET_CONTROLLER
891499f1640SStefan Agner	select ARMV7M_SYSTICK
89225263186SMaxime Coquelin	select CLKSRC_STM32
893f64e9804SMaxime Coquelin	select PINCTRL
894499f1640SStefan Agner	select RESET_CONTROLLER
895499f1640SStefan Agner	help
896499f1640SStefan Agner	  Support for STMicroelectronics STM32 processors.
897499f1640SStefan Agner
898fa65fc6bSMaxime Coquelinconfig MACH_STM32F429
899fa65fc6bSMaxime Coquelin	bool "STMicrolectronics STM32F429"
900fa65fc6bSMaxime Coquelin	depends on ARCH_STM32
901fa65fc6bSMaxime Coquelin	default y
902fa65fc6bSMaxime Coquelin
9031847119dSVladimir Murzinconfig ARCH_MPS2
9041847119dSVladimir Murzin	bool "ARM MPS2 paltform"
9051847119dSVladimir Murzin	depends on ARM_SINGLE_ARMV7M
9061847119dSVladimir Murzin	select ARM_AMBA
9071847119dSVladimir Murzin	select CLKSRC_MPS2
9081847119dSVladimir Murzin	help
9091847119dSVladimir Murzin	  Support for Cortex-M Prototyping System (or V2M-MPS2) which comes
9101847119dSVladimir Murzin	  with a range of available cores like Cortex-M3/M4/M7.
9111847119dSVladimir Murzin
9121847119dSVladimir Murzin	  Please, note that depends which Application Note is used memory map
9131847119dSVladimir Murzin	  for the platform may vary, so adjustment of RAM base might be needed.
9141847119dSVladimir Murzin
9151da177e4SLinus Torvalds# Definitions to make life easier
9161da177e4SLinus Torvaldsconfig ARCH_ACORN
9171da177e4SLinus Torvalds	bool
9181da177e4SLinus Torvalds
9197ae1f7ecSLennert Buytenhekconfig PLAT_IOP
9207ae1f7ecSLennert Buytenhek	bool
921469d3044SMikael Pettersson	select GENERIC_CLOCKEVENTS
9227ae1f7ecSLennert Buytenhek
92369b02f6aSLennert Buytenhekconfig PLAT_ORION
92469b02f6aSLennert Buytenhek	bool
925bfe45e0bSRussell King	select CLKSRC_MMIO
926b1b3f49cSRussell King	select COMMON_CLK
927dc7ad3b3SRussell King	select GENERIC_IRQ_CHIP
928278b45b0SAndrew Lunn	select IRQ_DOMAIN
92969b02f6aSLennert Buytenhek
930abcda1dcSThomas Petazzoniconfig PLAT_ORION_LEGACY
931abcda1dcSThomas Petazzoni	bool
932abcda1dcSThomas Petazzoni	select PLAT_ORION
933abcda1dcSThomas Petazzoni
934bd5ce433SEric Miaoconfig PLAT_PXA
935bd5ce433SEric Miao	bool
936bd5ce433SEric Miao
937f4b8b319SRussell Kingconfig PLAT_VERSATILE
938f4b8b319SRussell King	bool
939f4b8b319SRussell King
940d9a1beaaSAlexandre Courbotsource "arch/arm/firmware/Kconfig"
941d9a1beaaSAlexandre Courbot
9421da177e4SLinus Torvaldssource arch/arm/mm/Kconfig
9431da177e4SLinus Torvalds
944afe4b25eSLennert Buytenhekconfig IWMMXT
945d93003e8SSebastian Hesselbarth	bool "Enable iWMMXt support"
946d93003e8SSebastian Hesselbarth	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
947d93003e8SSebastian Hesselbarth	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
948afe4b25eSLennert Buytenhek	help
949afe4b25eSLennert Buytenhek	  Enable support for iWMMXt context switching at run time if
950afe4b25eSLennert Buytenhek	  running on a CPU that supports it.
951afe4b25eSLennert Buytenhek
95252108641Seric miaoconfig MULTI_IRQ_HANDLER
95352108641Seric miao	bool
95452108641Seric miao	help
95552108641Seric miao	  Allow each machine to specify it's own IRQ handler at run time.
95652108641Seric miao
9573b93e7b0SHyok S. Choiif !MMU
9583b93e7b0SHyok S. Choisource "arch/arm/Kconfig-nommu"
9593b93e7b0SHyok S. Choiendif
9603b93e7b0SHyok S. Choi
9613e0a07f8SGregory CLEMENTconfig PJ4B_ERRATA_4742
9623e0a07f8SGregory CLEMENT	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
9633e0a07f8SGregory CLEMENT	depends on CPU_PJ4B && MACH_ARMADA_370
9643e0a07f8SGregory CLEMENT	default y
9653e0a07f8SGregory CLEMENT	help
9663e0a07f8SGregory CLEMENT	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
9673e0a07f8SGregory CLEMENT	  Event (WFE) IDLE states, a specific timing sensitivity exists between
9683e0a07f8SGregory CLEMENT	  the retiring WFI/WFE instructions and the newly issued subsequent
9693e0a07f8SGregory CLEMENT	  instructions.  This sensitivity can result in a CPU hang scenario.
9703e0a07f8SGregory CLEMENT	  Workaround:
9713e0a07f8SGregory CLEMENT	  The software must insert either a Data Synchronization Barrier (DSB)
9723e0a07f8SGregory CLEMENT	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
9733e0a07f8SGregory CLEMENT	  instruction
9743e0a07f8SGregory CLEMENT
975f0c4b8d6SWill Deaconconfig ARM_ERRATA_326103
976f0c4b8d6SWill Deacon	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
977f0c4b8d6SWill Deacon	depends on CPU_V6
978f0c4b8d6SWill Deacon	help
979f0c4b8d6SWill Deacon	  Executing a SWP instruction to read-only memory does not set bit 11
980f0c4b8d6SWill Deacon	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
981f0c4b8d6SWill Deacon	  treat the access as a read, preventing a COW from occurring and
982f0c4b8d6SWill Deacon	  causing the faulting task to livelock.
983f0c4b8d6SWill Deacon
9849cba3cccSCatalin Marinasconfig ARM_ERRATA_411920
9859cba3cccSCatalin Marinas	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
986e399b1a4SRussell King	depends on CPU_V6 || CPU_V6K
9879cba3cccSCatalin Marinas	help
9889cba3cccSCatalin Marinas	  Invalidation of the Instruction Cache operation can
9899cba3cccSCatalin Marinas	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
9909cba3cccSCatalin Marinas	  It does not affect the MPCore. This option enables the ARM Ltd.
9919cba3cccSCatalin Marinas	  recommended workaround.
9929cba3cccSCatalin Marinas
9937ce236fcSCatalin Marinasconfig ARM_ERRATA_430973
9947ce236fcSCatalin Marinas	bool "ARM errata: Stale prediction on replaced interworking branch"
9957ce236fcSCatalin Marinas	depends on CPU_V7
9967ce236fcSCatalin Marinas	help
9977ce236fcSCatalin Marinas	  This option enables the workaround for the 430973 Cortex-A8
99879403cdaSRussell King	  r1p* erratum. If a code sequence containing an ARM/Thumb
9997ce236fcSCatalin Marinas	  interworking branch is replaced with another code sequence at the
10007ce236fcSCatalin Marinas	  same virtual address, whether due to self-modifying code or virtual
10017ce236fcSCatalin Marinas	  to physical address re-mapping, Cortex-A8 does not recover from the
10027ce236fcSCatalin Marinas	  stale interworking branch prediction. This results in Cortex-A8
10037ce236fcSCatalin Marinas	  executing the new code sequence in the incorrect ARM or Thumb state.
10047ce236fcSCatalin Marinas	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
10057ce236fcSCatalin Marinas	  and also flushes the branch target cache at every context switch.
10067ce236fcSCatalin Marinas	  Note that setting specific bits in the ACTLR register may not be
10077ce236fcSCatalin Marinas	  available in non-secure mode.
10087ce236fcSCatalin Marinas
1009855c551fSCatalin Marinasconfig ARM_ERRATA_458693
1010855c551fSCatalin Marinas	bool "ARM errata: Processor deadlock when a false hazard is created"
1011855c551fSCatalin Marinas	depends on CPU_V7
101262e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1013855c551fSCatalin Marinas	help
1014855c551fSCatalin Marinas	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1015855c551fSCatalin Marinas	  erratum. For very specific sequences of memory operations, it is
1016855c551fSCatalin Marinas	  possible for a hazard condition intended for a cache line to instead
1017855c551fSCatalin Marinas	  be incorrectly associated with a different cache line. This false
1018855c551fSCatalin Marinas	  hazard might then cause a processor deadlock. The workaround enables
1019855c551fSCatalin Marinas	  the L1 caching of the NEON accesses and disables the PLD instruction
1020855c551fSCatalin Marinas	  in the ACTLR register. Note that setting specific bits in the ACTLR
1021855c551fSCatalin Marinas	  register may not be available in non-secure mode.
1022855c551fSCatalin Marinas
10230516e464SCatalin Marinasconfig ARM_ERRATA_460075
10240516e464SCatalin Marinas	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
10250516e464SCatalin Marinas	depends on CPU_V7
102662e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
10270516e464SCatalin Marinas	help
10280516e464SCatalin Marinas	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
10290516e464SCatalin Marinas	  erratum. Any asynchronous access to the L2 cache may encounter a
10300516e464SCatalin Marinas	  situation in which recent store transactions to the L2 cache are lost
10310516e464SCatalin Marinas	  and overwritten with stale memory contents from external memory. The
10320516e464SCatalin Marinas	  workaround disables the write-allocate mode for the L2 cache via the
10330516e464SCatalin Marinas	  ACTLR register. Note that setting specific bits in the ACTLR register
10340516e464SCatalin Marinas	  may not be available in non-secure mode.
10350516e464SCatalin Marinas
10369f05027cSWill Deaconconfig ARM_ERRATA_742230
10379f05027cSWill Deacon	bool "ARM errata: DMB operation may be faulty"
10389f05027cSWill Deacon	depends on CPU_V7 && SMP
103962e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
10409f05027cSWill Deacon	help
10419f05027cSWill Deacon	  This option enables the workaround for the 742230 Cortex-A9
10429f05027cSWill Deacon	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
10439f05027cSWill Deacon	  between two write operations may not ensure the correct visibility
10449f05027cSWill Deacon	  ordering of the two writes. This workaround sets a specific bit in
10459f05027cSWill Deacon	  the diagnostic register of the Cortex-A9 which causes the DMB
10469f05027cSWill Deacon	  instruction to behave as a DSB, ensuring the correct behaviour of
10479f05027cSWill Deacon	  the two writes.
10489f05027cSWill Deacon
1049a672e99bSWill Deaconconfig ARM_ERRATA_742231
1050a672e99bSWill Deacon	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1051a672e99bSWill Deacon	depends on CPU_V7 && SMP
105262e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1053a672e99bSWill Deacon	help
1054a672e99bSWill Deacon	  This option enables the workaround for the 742231 Cortex-A9
1055a672e99bSWill Deacon	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
1056a672e99bSWill Deacon	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1057a672e99bSWill Deacon	  accessing some data located in the same cache line, may get corrupted
1058a672e99bSWill Deacon	  data due to bad handling of the address hazard when the line gets
1059a672e99bSWill Deacon	  replaced from one of the CPUs at the same time as another CPU is
1060a672e99bSWill Deacon	  accessing it. This workaround sets specific bits in the diagnostic
1061a672e99bSWill Deacon	  register of the Cortex-A9 which reduces the linefill issuing
1062a672e99bSWill Deacon	  capabilities of the processor.
1063a672e99bSWill Deacon
106469155794SJon Medhurstconfig ARM_ERRATA_643719
106569155794SJon Medhurst	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
106669155794SJon Medhurst	depends on CPU_V7 && SMP
1067e5a5de44SRussell King	default y
106869155794SJon Medhurst	help
106969155794SJon Medhurst	  This option enables the workaround for the 643719 Cortex-A9 (prior to
107069155794SJon Medhurst	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
107169155794SJon Medhurst	  register returns zero when it should return one. The workaround
107269155794SJon Medhurst	  corrects this value, ensuring cache maintenance operations which use
107369155794SJon Medhurst	  it behave as intended and avoiding data corruption.
107469155794SJon Medhurst
1075cdf357f1SWill Deaconconfig ARM_ERRATA_720789
1076cdf357f1SWill Deacon	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1077e66dc745SDave Martin	depends on CPU_V7
1078cdf357f1SWill Deacon	help
1079cdf357f1SWill Deacon	  This option enables the workaround for the 720789 Cortex-A9 (prior to
1080cdf357f1SWill Deacon	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1081cdf357f1SWill Deacon	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1082cdf357f1SWill Deacon	  As a consequence of this erratum, some TLB entries which should be
1083cdf357f1SWill Deacon	  invalidated are not, resulting in an incoherency in the system page
1084cdf357f1SWill Deacon	  tables. The workaround changes the TLB flushing routines to invalidate
1085cdf357f1SWill Deacon	  entries regardless of the ASID.
1086475d92fcSWill Deacon
1087475d92fcSWill Deaconconfig ARM_ERRATA_743622
1088475d92fcSWill Deacon	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1089475d92fcSWill Deacon	depends on CPU_V7
109062e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1091475d92fcSWill Deacon	help
1092475d92fcSWill Deacon	  This option enables the workaround for the 743622 Cortex-A9
1093efbc74acSWill Deacon	  (r2p*) erratum. Under very rare conditions, a faulty
1094475d92fcSWill Deacon	  optimisation in the Cortex-A9 Store Buffer may lead to data
1095475d92fcSWill Deacon	  corruption. This workaround sets a specific bit in the diagnostic
1096475d92fcSWill Deacon	  register of the Cortex-A9 which disables the Store Buffer
1097475d92fcSWill Deacon	  optimisation, preventing the defect from occurring. This has no
1098475d92fcSWill Deacon	  visible impact on the overall performance or power consumption of the
1099475d92fcSWill Deacon	  processor.
1100475d92fcSWill Deacon
11019a27c27cSWill Deaconconfig ARM_ERRATA_751472
11029a27c27cSWill Deacon	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1103ba90c516SDave Martin	depends on CPU_V7
110462e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
11059a27c27cSWill Deacon	help
11069a27c27cSWill Deacon	  This option enables the workaround for the 751472 Cortex-A9 (prior
11079a27c27cSWill Deacon	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
11089a27c27cSWill Deacon	  completion of a following broadcasted operation if the second
11099a27c27cSWill Deacon	  operation is received by a CPU before the ICIALLUIS has completed,
11109a27c27cSWill Deacon	  potentially leading to corrupted entries in the cache or TLB.
11119a27c27cSWill Deacon
1112fcbdc5feSWill Deaconconfig ARM_ERRATA_754322
1113fcbdc5feSWill Deacon	bool "ARM errata: possible faulty MMU translations following an ASID switch"
1114fcbdc5feSWill Deacon	depends on CPU_V7
1115fcbdc5feSWill Deacon	help
1116fcbdc5feSWill Deacon	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1117fcbdc5feSWill Deacon	  r3p*) erratum. A speculative memory access may cause a page table walk
1118fcbdc5feSWill Deacon	  which starts prior to an ASID switch but completes afterwards. This
1119fcbdc5feSWill Deacon	  can populate the micro-TLB with a stale entry which may be hit with
1120fcbdc5feSWill Deacon	  the new ASID. This workaround places two dsb instructions in the mm
1121fcbdc5feSWill Deacon	  switching code so that no page table walks can cross the ASID switch.
1122fcbdc5feSWill Deacon
11235dab26afSWill Deaconconfig ARM_ERRATA_754327
11245dab26afSWill Deacon	bool "ARM errata: no automatic Store Buffer drain"
11255dab26afSWill Deacon	depends on CPU_V7 && SMP
11265dab26afSWill Deacon	help
11275dab26afSWill Deacon	  This option enables the workaround for the 754327 Cortex-A9 (prior to
11285dab26afSWill Deacon	  r2p0) erratum. The Store Buffer does not have any automatic draining
11295dab26afSWill Deacon	  mechanism and therefore a livelock may occur if an external agent
11305dab26afSWill Deacon	  continuously polls a memory location waiting to observe an update.
11315dab26afSWill Deacon	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
11325dab26afSWill Deacon	  written polling loops from denying visibility of updates to memory.
11335dab26afSWill Deacon
1134145e10e1SCatalin Marinasconfig ARM_ERRATA_364296
1135145e10e1SCatalin Marinas	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1136fd832478SFabio Estevam	depends on CPU_V6
1137145e10e1SCatalin Marinas	help
1138145e10e1SCatalin Marinas	  This options enables the workaround for the 364296 ARM1136
1139145e10e1SCatalin Marinas	  r0p2 erratum (possible cache data corruption with
1140145e10e1SCatalin Marinas	  hit-under-miss enabled). It sets the undocumented bit 31 in
1141145e10e1SCatalin Marinas	  the auxiliary control register and the FI bit in the control
1142145e10e1SCatalin Marinas	  register, thus disabling hit-under-miss without putting the
1143145e10e1SCatalin Marinas	  processor into full low interrupt latency mode. ARM11MPCore
1144145e10e1SCatalin Marinas	  is not affected.
1145145e10e1SCatalin Marinas
1146f630c1bdSWill Deaconconfig ARM_ERRATA_764369
1147f630c1bdSWill Deacon	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1148f630c1bdSWill Deacon	depends on CPU_V7 && SMP
1149f630c1bdSWill Deacon	help
1150f630c1bdSWill Deacon	  This option enables the workaround for erratum 764369
1151f630c1bdSWill Deacon	  affecting Cortex-A9 MPCore with two or more processors (all
1152f630c1bdSWill Deacon	  current revisions). Under certain timing circumstances, a data
1153f630c1bdSWill Deacon	  cache line maintenance operation by MVA targeting an Inner
1154f630c1bdSWill Deacon	  Shareable memory region may fail to proceed up to either the
1155f630c1bdSWill Deacon	  Point of Coherency or to the Point of Unification of the
1156f630c1bdSWill Deacon	  system. This workaround adds a DSB instruction before the
1157f630c1bdSWill Deacon	  relevant cache maintenance functions and sets a specific bit
1158f630c1bdSWill Deacon	  in the diagnostic control register of the SCU.
1159f630c1bdSWill Deacon
11607253b85cSSimon Hormanconfig ARM_ERRATA_775420
11617253b85cSSimon Horman       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
11627253b85cSSimon Horman       depends on CPU_V7
11637253b85cSSimon Horman       help
11647253b85cSSimon Horman	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
11657253b85cSSimon Horman	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
11667253b85cSSimon Horman	 operation aborts with MMU exception, it might cause the processor
11677253b85cSSimon Horman	 to deadlock. This workaround puts DSB before executing ISB if
11687253b85cSSimon Horman	 an abort may occur on cache maintenance.
11697253b85cSSimon Horman
117093dc6887SCatalin Marinasconfig ARM_ERRATA_798181
117193dc6887SCatalin Marinas	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
117293dc6887SCatalin Marinas	depends on CPU_V7 && SMP
117393dc6887SCatalin Marinas	help
117493dc6887SCatalin Marinas	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
117593dc6887SCatalin Marinas	  adequately shooting down all use of the old entries. This
117693dc6887SCatalin Marinas	  option enables the Linux kernel workaround for this erratum
117793dc6887SCatalin Marinas	  which sends an IPI to the CPUs that are running the same ASID
117893dc6887SCatalin Marinas	  as the one being invalidated.
117993dc6887SCatalin Marinas
118084b6504fSWill Deaconconfig ARM_ERRATA_773022
118184b6504fSWill Deacon	bool "ARM errata: incorrect instructions may be executed from loop buffer"
118284b6504fSWill Deacon	depends on CPU_V7
118384b6504fSWill Deacon	help
118484b6504fSWill Deacon	  This option enables the workaround for the 773022 Cortex-A15
118584b6504fSWill Deacon	  (up to r0p4) erratum. In certain rare sequences of code, the
118684b6504fSWill Deacon	  loop buffer may deliver incorrect instructions. This
118784b6504fSWill Deacon	  workaround disables the loop buffer to avoid the erratum.
118884b6504fSWill Deacon
11891da177e4SLinus Torvaldsendmenu
11901da177e4SLinus Torvalds
11911da177e4SLinus Torvaldssource "arch/arm/common/Kconfig"
11921da177e4SLinus Torvalds
11931da177e4SLinus Torvaldsmenu "Bus support"
11941da177e4SLinus Torvalds
11951da177e4SLinus Torvaldsconfig ISA
11961da177e4SLinus Torvalds	bool
11971da177e4SLinus Torvalds	help
11981da177e4SLinus Torvalds	  Find out whether you have ISA slots on your motherboard.  ISA is the
11991da177e4SLinus Torvalds	  name of a bus system, i.e. the way the CPU talks to the other stuff
12001da177e4SLinus Torvalds	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
12011da177e4SLinus Torvalds	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
12021da177e4SLinus Torvalds	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
12031da177e4SLinus Torvalds
1204065909b9SRussell King# Select ISA DMA controller support
12051da177e4SLinus Torvaldsconfig ISA_DMA
12061da177e4SLinus Torvalds	bool
1207065909b9SRussell King	select ISA_DMA_API
12081da177e4SLinus Torvalds
1209065909b9SRussell King# Select ISA DMA interface
12105cae841bSAl Viroconfig ISA_DMA_API
12115cae841bSAl Viro	bool
12125cae841bSAl Viro
12131da177e4SLinus Torvaldsconfig PCI
12140b05da72SHans Ulli Kroll	bool "PCI support" if MIGHT_HAVE_PCI
12151da177e4SLinus Torvalds	help
12161da177e4SLinus Torvalds	  Find out whether you have a PCI motherboard. PCI is the name of a
12171da177e4SLinus Torvalds	  bus system, i.e. the way the CPU talks to the other stuff inside
12181da177e4SLinus Torvalds	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
12191da177e4SLinus Torvalds	  VESA. If you have PCI, say Y, otherwise N.
12201da177e4SLinus Torvalds
122152882173SAnton Vorontsovconfig PCI_DOMAINS
122252882173SAnton Vorontsov	bool
122352882173SAnton Vorontsov	depends on PCI
122452882173SAnton Vorontsov
12258c7d1474SLorenzo Pieralisiconfig PCI_DOMAINS_GENERIC
12268c7d1474SLorenzo Pieralisi	def_bool PCI_DOMAINS
12278c7d1474SLorenzo Pieralisi
1228b080ac8aSMarcelo Roberto Jimenezconfig PCI_NANOENGINE
1229b080ac8aSMarcelo Roberto Jimenez	bool "BSE nanoEngine PCI support"
1230b080ac8aSMarcelo Roberto Jimenez	depends on SA1100_NANOENGINE
1231b080ac8aSMarcelo Roberto Jimenez	help
1232b080ac8aSMarcelo Roberto Jimenez	  Enable PCI on the BSE nanoEngine board.
1233b080ac8aSMarcelo Roberto Jimenez
123436e23590SMatthew Wilcoxconfig PCI_SYSCALL
123536e23590SMatthew Wilcox	def_bool PCI
123636e23590SMatthew Wilcox
1237a0113a99SMike Rapoportconfig PCI_HOST_ITE8152
1238a0113a99SMike Rapoport	bool
1239a0113a99SMike Rapoport	depends on PCI && MACH_ARMCORE
1240a0113a99SMike Rapoport	default y
1241a0113a99SMike Rapoport	select DMABOUNCE
1242a0113a99SMike Rapoport
12431da177e4SLinus Torvaldssource "drivers/pci/Kconfig"
12441da177e4SLinus Torvalds
12451da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig"
12461da177e4SLinus Torvalds
12471da177e4SLinus Torvaldsendmenu
12481da177e4SLinus Torvalds
12491da177e4SLinus Torvaldsmenu "Kernel Features"
12501da177e4SLinus Torvalds
12513b55658aSDave Martinconfig HAVE_SMP
12523b55658aSDave Martin	bool
12533b55658aSDave Martin	help
12543b55658aSDave Martin	  This option should be selected by machines which have an SMP-
12553b55658aSDave Martin	  capable CPU.
12563b55658aSDave Martin
12573b55658aSDave Martin	  The only effect of this option is to make the SMP-related
12583b55658aSDave Martin	  options available to the user for configuration.
12593b55658aSDave Martin
12601da177e4SLinus Torvaldsconfig SMP
1261bb2d8130SRussell King	bool "Symmetric Multi-Processing"
1262fbb4ddacSRussell King	depends on CPU_V6K || CPU_V7
1263bc28248eSRussell King	depends on GENERIC_CLOCKEVENTS
12643b55658aSDave Martin	depends on HAVE_SMP
1265801bb21cSJonathan Austin	depends on MMU || ARM_MPU
12660361748fSArnd Bergmann	select IRQ_WORK
12671da177e4SLinus Torvalds	help
12681da177e4SLinus Torvalds	  This enables support for systems with more than one CPU. If you have
12694a474157SRobert Graffham	  a system with only one CPU, say N. If you have a system with more
12704a474157SRobert Graffham	  than one CPU, say Y.
12711da177e4SLinus Torvalds
12724a474157SRobert Graffham	  If you say N here, the kernel will run on uni- and multiprocessor
12731da177e4SLinus Torvalds	  machines, but will use only one CPU of a multiprocessor machine. If
12744a474157SRobert Graffham	  you say Y here, the kernel will run on many, but not all,
12754a474157SRobert Graffham	  uniprocessor machines. On a uniprocessor machine, the kernel
12764a474157SRobert Graffham	  will run faster if you say N here.
12771da177e4SLinus Torvalds
1278395cf969SPaul Bolle	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
12791da177e4SLinus Torvalds	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
128050a23e6eSJustin P. Mattock	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
12811da177e4SLinus Torvalds
12821da177e4SLinus Torvalds	  If you don't know what to do here, say N.
12831da177e4SLinus Torvalds
1284f00ec48fSRussell Kingconfig SMP_ON_UP
12855744ff43SRussell King	bool "Allow booting SMP kernel on uniprocessor systems"
1286801bb21cSJonathan Austin	depends on SMP && !XIP_KERNEL && MMU
1287f00ec48fSRussell King	default y
1288f00ec48fSRussell King	help
1289f00ec48fSRussell King	  SMP kernels contain instructions which fail on non-SMP processors.
1290f00ec48fSRussell King	  Enabling this option allows the kernel to modify itself to make
1291f00ec48fSRussell King	  these instructions safe.  Disabling it allows about 1K of space
1292f00ec48fSRussell King	  savings.
1293f00ec48fSRussell King
1294f00ec48fSRussell King	  If you don't know what to do here, say Y.
1295f00ec48fSRussell King
1296c9018aabSVincent Guittotconfig ARM_CPU_TOPOLOGY
1297c9018aabSVincent Guittot	bool "Support cpu topology definition"
1298c9018aabSVincent Guittot	depends on SMP && CPU_V7
1299c9018aabSVincent Guittot	default y
1300c9018aabSVincent Guittot	help
1301c9018aabSVincent Guittot	  Support ARM cpu topology definition. The MPIDR register defines
1302c9018aabSVincent Guittot	  affinity between processors which is then used to describe the cpu
1303c9018aabSVincent Guittot	  topology of an ARM System.
1304c9018aabSVincent Guittot
1305c9018aabSVincent Guittotconfig SCHED_MC
1306c9018aabSVincent Guittot	bool "Multi-core scheduler support"
1307c9018aabSVincent Guittot	depends on ARM_CPU_TOPOLOGY
1308c9018aabSVincent Guittot	help
1309c9018aabSVincent Guittot	  Multi-core scheduler support improves the CPU scheduler's decision
1310c9018aabSVincent Guittot	  making when dealing with multi-core CPU chips at a cost of slightly
1311c9018aabSVincent Guittot	  increased overhead in some places. If unsure say N here.
1312c9018aabSVincent Guittot
1313c9018aabSVincent Guittotconfig SCHED_SMT
1314c9018aabSVincent Guittot	bool "SMT scheduler support"
1315c9018aabSVincent Guittot	depends on ARM_CPU_TOPOLOGY
1316c9018aabSVincent Guittot	help
1317c9018aabSVincent Guittot	  Improves the CPU scheduler's decision making when dealing with
1318c9018aabSVincent Guittot	  MultiThreading at a cost of slightly increased overhead in some
1319c9018aabSVincent Guittot	  places. If unsure say N here.
1320c9018aabSVincent Guittot
1321a8cbcd92SRussell Kingconfig HAVE_ARM_SCU
1322a8cbcd92SRussell King	bool
1323a8cbcd92SRussell King	help
1324a8cbcd92SRussell King	  This option enables support for the ARM system coherency unit
1325a8cbcd92SRussell King
13268a4da6e3SMark Rutlandconfig HAVE_ARM_ARCH_TIMER
1327022c03a2SMarc Zyngier	bool "Architected timer support"
1328022c03a2SMarc Zyngier	depends on CPU_V7
13298a4da6e3SMark Rutland	select ARM_ARCH_TIMER
13300c403462SWill Deacon	select GENERIC_CLOCKEVENTS
1331022c03a2SMarc Zyngier	help
1332022c03a2SMarc Zyngier	  This option enables support for the ARM architected timer
1333022c03a2SMarc Zyngier
1334f32f4ce2SRussell Kingconfig HAVE_ARM_TWD
1335f32f4ce2SRussell King	bool
1336da4a686aSRob Herring	select CLKSRC_OF if OF
1337f32f4ce2SRussell King	help
1338f32f4ce2SRussell King	  This options enables support for the ARM timer and watchdog unit
1339f32f4ce2SRussell King
1340e8db288eSNicolas Pitreconfig MCPM
1341e8db288eSNicolas Pitre	bool "Multi-Cluster Power Management"
1342e8db288eSNicolas Pitre	depends on CPU_V7 && SMP
1343e8db288eSNicolas Pitre	help
1344e8db288eSNicolas Pitre	  This option provides the common power management infrastructure
1345e8db288eSNicolas Pitre	  for (multi-)cluster based systems, such as big.LITTLE based
1346e8db288eSNicolas Pitre	  systems.
1347e8db288eSNicolas Pitre
1348ebf4a5c5SHaojian Zhuangconfig MCPM_QUAD_CLUSTER
1349ebf4a5c5SHaojian Zhuang	bool
1350ebf4a5c5SHaojian Zhuang	depends on MCPM
1351ebf4a5c5SHaojian Zhuang	help
1352ebf4a5c5SHaojian Zhuang	  To avoid wasting resources unnecessarily, MCPM only supports up
1353ebf4a5c5SHaojian Zhuang	  to 2 clusters by default.
1354ebf4a5c5SHaojian Zhuang	  Platforms with 3 or 4 clusters that use MCPM must select this
1355ebf4a5c5SHaojian Zhuang	  option to allow the additional clusters to be managed.
1356ebf4a5c5SHaojian Zhuang
13571c33be57SNicolas Pitreconfig BIG_LITTLE
13581c33be57SNicolas Pitre	bool "big.LITTLE support (Experimental)"
13591c33be57SNicolas Pitre	depends on CPU_V7 && SMP
13601c33be57SNicolas Pitre	select MCPM
13611c33be57SNicolas Pitre	help
13621c33be57SNicolas Pitre	  This option enables support selections for the big.LITTLE
13631c33be57SNicolas Pitre	  system architecture.
13641c33be57SNicolas Pitre
13651c33be57SNicolas Pitreconfig BL_SWITCHER
13661c33be57SNicolas Pitre	bool "big.LITTLE switcher support"
13676c044fecSArnd Bergmann	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU && ARM_GIC
136851aaf81fSRussell King	select CPU_PM
13691c33be57SNicolas Pitre	help
13701c33be57SNicolas Pitre	  The big.LITTLE "switcher" provides the core functionality to
13711c33be57SNicolas Pitre	  transparently handle transition between a cluster of A15's
13721c33be57SNicolas Pitre	  and a cluster of A7's in a big.LITTLE system.
13731c33be57SNicolas Pitre
1374b22537c6SNicolas Pitreconfig BL_SWITCHER_DUMMY_IF
1375b22537c6SNicolas Pitre	tristate "Simple big.LITTLE switcher user interface"
1376b22537c6SNicolas Pitre	depends on BL_SWITCHER && DEBUG_KERNEL
1377b22537c6SNicolas Pitre	help
1378b22537c6SNicolas Pitre	  This is a simple and dummy char dev interface to control
1379b22537c6SNicolas Pitre	  the big.LITTLE switcher core code.  It is meant for
1380b22537c6SNicolas Pitre	  debugging purposes only.
1381b22537c6SNicolas Pitre
13828d5796d2SLennert Buytenhekchoice
13838d5796d2SLennert Buytenhek	prompt "Memory split"
1384006fa259SRussell King	depends on MMU
13858d5796d2SLennert Buytenhek	default VMSPLIT_3G
13868d5796d2SLennert Buytenhek	help
13878d5796d2SLennert Buytenhek	  Select the desired split between kernel and user memory.
13888d5796d2SLennert Buytenhek
13898d5796d2SLennert Buytenhek	  If you are not absolutely sure what you are doing, leave this
13908d5796d2SLennert Buytenhek	  option alone!
13918d5796d2SLennert Buytenhek
13928d5796d2SLennert Buytenhek	config VMSPLIT_3G
13938d5796d2SLennert Buytenhek		bool "3G/1G user/kernel split"
139463ce446cSNicolas Pitre	config VMSPLIT_3G_OPT
139563ce446cSNicolas Pitre		bool "3G/1G user/kernel split (for full 1G low memory)"
13968d5796d2SLennert Buytenhek	config VMSPLIT_2G
13978d5796d2SLennert Buytenhek		bool "2G/2G user/kernel split"
13988d5796d2SLennert Buytenhek	config VMSPLIT_1G
13998d5796d2SLennert Buytenhek		bool "1G/3G user/kernel split"
14008d5796d2SLennert Buytenhekendchoice
14018d5796d2SLennert Buytenhek
14028d5796d2SLennert Buytenhekconfig PAGE_OFFSET
14038d5796d2SLennert Buytenhek	hex
1404006fa259SRussell King	default PHYS_OFFSET if !MMU
14058d5796d2SLennert Buytenhek	default 0x40000000 if VMSPLIT_1G
14068d5796d2SLennert Buytenhek	default 0x80000000 if VMSPLIT_2G
140763ce446cSNicolas Pitre	default 0xB0000000 if VMSPLIT_3G_OPT
14088d5796d2SLennert Buytenhek	default 0xC0000000
14098d5796d2SLennert Buytenhek
14101da177e4SLinus Torvaldsconfig NR_CPUS
14111da177e4SLinus Torvalds	int "Maximum number of CPUs (2-32)"
14121da177e4SLinus Torvalds	range 2 32
14131da177e4SLinus Torvalds	depends on SMP
14141da177e4SLinus Torvalds	default "4"
14151da177e4SLinus Torvalds
1416a054a811SRussell Kingconfig HOTPLUG_CPU
141700b7dedeSRussell King	bool "Support for hot-pluggable CPUs"
141840b31360SStephen Rothwell	depends on SMP
1419a054a811SRussell King	help
1420a054a811SRussell King	  Say Y here to experiment with turning CPUs off and on.  CPUs
1421a054a811SRussell King	  can be controlled through /sys/devices/system/cpu.
1422a054a811SRussell King
14232bdd424fSWill Deaconconfig ARM_PSCI
14242bdd424fSWill Deacon	bool "Support for the ARM Power State Coordination Interface (PSCI)"
1425e679660dSJens Wiklander	depends on HAVE_ARM_SMCCC
1426be120397SMark Rutland	select ARM_PSCI_FW
14272bdd424fSWill Deacon	help
14282bdd424fSWill Deacon	  Say Y here if you want Linux to communicate with system firmware
14292bdd424fSWill Deacon	  implementing the PSCI specification for CPU-centric power
14302bdd424fSWill Deacon	  management operations described in ARM document number ARM DEN
14312bdd424fSWill Deacon	  0022A ("Power State Coordination Interface System Software on
14322bdd424fSWill Deacon	  ARM processors").
14332bdd424fSWill Deacon
14342a6ad871SMaxime Ripard# The GPIO number here must be sorted by descending number. In case of
14352a6ad871SMaxime Ripard# a multiplatform kernel, we just want the highest value required by the
14362a6ad871SMaxime Ripard# selected platforms.
143744986ab0SPeter De Schrijver (NVIDIA)config ARCH_NR_GPIO
143844986ab0SPeter De Schrijver (NVIDIA)	int
1439b35d2e56SGregory Fong	default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1440b35d2e56SGregory Fong		ARCH_ZYNQ
1441aa42587aSTomasz Figa	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1442aa42587aSTomasz Figa		SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
1443eb171a99SBoris BREZILLON	default 416 if ARCH_SUNXI
144406b851e5SOlof Johansson	default 392 if ARCH_U8500
144501bb914cSTony Prisk	default 352 if ARCH_VT8500
14467b5da4c3SHeiko Stuebner	default 288 if ARCH_ROCKCHIP
14472a6ad871SMaxime Ripard	default 264 if MACH_H4700
144844986ab0SPeter De Schrijver (NVIDIA)	default 0
144944986ab0SPeter De Schrijver (NVIDIA)	help
145044986ab0SPeter De Schrijver (NVIDIA)	  Maximum number of GPIOs in the system.
145144986ab0SPeter De Schrijver (NVIDIA)
145244986ab0SPeter De Schrijver (NVIDIA)	  If unsure, leave the default value.
145344986ab0SPeter De Schrijver (NVIDIA)
1454d45a398fSUwe Kleine-Königsource kernel/Kconfig.preempt
14551da177e4SLinus Torvalds
1456c9218b16SRussell Kingconfig HZ_FIXED
1457f8065813SRussell King	int
1458070b8b43SKukjin Kim	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
1459a73ddc61SKukjin Kim		ARCH_S5PV210 || ARCH_EXYNOS4
14601164f672SAlexandre Belloni	default 128 if SOC_AT91RM9200
146147d84682SRussell King	default 0
1462c9218b16SRussell King
1463c9218b16SRussell Kingchoice
146447d84682SRussell King	depends on HZ_FIXED = 0
1465c9218b16SRussell King	prompt "Timer frequency"
1466c9218b16SRussell King
1467c9218b16SRussell Kingconfig HZ_100
1468c9218b16SRussell King	bool "100 Hz"
1469c9218b16SRussell King
1470c9218b16SRussell Kingconfig HZ_200
1471c9218b16SRussell King	bool "200 Hz"
1472c9218b16SRussell King
1473c9218b16SRussell Kingconfig HZ_250
1474c9218b16SRussell King	bool "250 Hz"
1475c9218b16SRussell King
1476c9218b16SRussell Kingconfig HZ_300
1477c9218b16SRussell King	bool "300 Hz"
1478c9218b16SRussell King
1479c9218b16SRussell Kingconfig HZ_500
1480c9218b16SRussell King	bool "500 Hz"
1481c9218b16SRussell King
1482c9218b16SRussell Kingconfig HZ_1000
1483c9218b16SRussell King	bool "1000 Hz"
1484c9218b16SRussell King
1485c9218b16SRussell Kingendchoice
1486c9218b16SRussell King
1487c9218b16SRussell Kingconfig HZ
1488c9218b16SRussell King	int
148947d84682SRussell King	default HZ_FIXED if HZ_FIXED != 0
1490c9218b16SRussell King	default 100 if HZ_100
1491c9218b16SRussell King	default 200 if HZ_200
1492c9218b16SRussell King	default 250 if HZ_250
1493c9218b16SRussell King	default 300 if HZ_300
1494c9218b16SRussell King	default 500 if HZ_500
1495c9218b16SRussell King	default 1000
1496c9218b16SRussell King
1497c9218b16SRussell Kingconfig SCHED_HRTICK
1498c9218b16SRussell King	def_bool HIGH_RES_TIMERS
1499f8065813SRussell King
150016c79651SCatalin Marinasconfig THUMB2_KERNEL
1501bc7dea00SUwe Kleine-König	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
15024477ca45SUwe Kleine-König	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1503bc7dea00SUwe Kleine-König	default y if CPU_THUMBONLY
150416c79651SCatalin Marinas	select AEABI
150516c79651SCatalin Marinas	select ARM_ASM_UNIFIED
150689bace65SArnd Bergmann	select ARM_UNWIND
150716c79651SCatalin Marinas	help
150816c79651SCatalin Marinas	  By enabling this option, the kernel will be compiled in
150916c79651SCatalin Marinas	  Thumb-2 mode. A compiler/assembler that understand the unified
151016c79651SCatalin Marinas	  ARM-Thumb syntax is needed.
151116c79651SCatalin Marinas
151216c79651SCatalin Marinas	  If unsure, say N.
151316c79651SCatalin Marinas
15146f685c5cSDave Martinconfig THUMB2_AVOID_R_ARM_THM_JUMP11
15156f685c5cSDave Martin	bool "Work around buggy Thumb-2 short branch relocations in gas"
15166f685c5cSDave Martin	depends on THUMB2_KERNEL && MODULES
15176f685c5cSDave Martin	default y
15186f685c5cSDave Martin	help
15196f685c5cSDave Martin	  Various binutils versions can resolve Thumb-2 branches to
15206f685c5cSDave Martin	  locally-defined, preemptible global symbols as short-range "b.n"
15216f685c5cSDave Martin	  branch instructions.
15226f685c5cSDave Martin
15236f685c5cSDave Martin	  This is a problem, because there's no guarantee the final
15246f685c5cSDave Martin	  destination of the symbol, or any candidate locations for a
15256f685c5cSDave Martin	  trampoline, are within range of the branch.  For this reason, the
15266f685c5cSDave Martin	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
15276f685c5cSDave Martin	  relocation in modules at all, and it makes little sense to add
15286f685c5cSDave Martin	  support.
15296f685c5cSDave Martin
15306f685c5cSDave Martin	  The symptom is that the kernel fails with an "unsupported
15316f685c5cSDave Martin	  relocation" error when loading some modules.
15326f685c5cSDave Martin
15336f685c5cSDave Martin	  Until fixed tools are available, passing
15346f685c5cSDave Martin	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
15356f685c5cSDave Martin	  code which hits this problem, at the cost of a bit of extra runtime
15366f685c5cSDave Martin	  stack usage in some cases.
15376f685c5cSDave Martin
15386f685c5cSDave Martin	  The problem is described in more detail at:
15396f685c5cSDave Martin	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
15406f685c5cSDave Martin
15416f685c5cSDave Martin	  Only Thumb-2 kernels are affected.
15426f685c5cSDave Martin
15436f685c5cSDave Martin	  Unless you are sure your tools don't have this problem, say Y.
15446f685c5cSDave Martin
15450becb088SCatalin Marinasconfig ARM_ASM_UNIFIED
15460becb088SCatalin Marinas	bool
15470becb088SCatalin Marinas
154842f25bddSNicolas Pitreconfig ARM_PATCH_IDIV
154942f25bddSNicolas Pitre	bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
155042f25bddSNicolas Pitre	depends on CPU_32v7 && !XIP_KERNEL
155142f25bddSNicolas Pitre	default y
155242f25bddSNicolas Pitre	help
155342f25bddSNicolas Pitre	  The ARM compiler inserts calls to __aeabi_idiv() and
155442f25bddSNicolas Pitre	  __aeabi_uidiv() when it needs to perform division on signed
155542f25bddSNicolas Pitre	  and unsigned integers. Some v7 CPUs have support for the sdiv
155642f25bddSNicolas Pitre	  and udiv instructions that can be used to implement those
155742f25bddSNicolas Pitre	  functions.
155842f25bddSNicolas Pitre
155942f25bddSNicolas Pitre	  Enabling this option allows the kernel to modify itself to
156042f25bddSNicolas Pitre	  replace the first two instructions of these library functions
156142f25bddSNicolas Pitre	  with the sdiv or udiv plus "bx lr" instructions when the CPU
156242f25bddSNicolas Pitre	  it is running on supports them. Typically this will be faster
156342f25bddSNicolas Pitre	  and less power intensive than running the original library
156442f25bddSNicolas Pitre	  code to do integer division.
156542f25bddSNicolas Pitre
1566704bdda0SNicolas Pitreconfig AEABI
1567704bdda0SNicolas Pitre	bool "Use the ARM EABI to compile the kernel"
1568704bdda0SNicolas Pitre	help
1569704bdda0SNicolas Pitre	  This option allows for the kernel to be compiled using the latest
1570704bdda0SNicolas Pitre	  ARM ABI (aka EABI).  This is only useful if you are using a user
1571704bdda0SNicolas Pitre	  space environment that is also compiled with EABI.
1572704bdda0SNicolas Pitre
1573704bdda0SNicolas Pitre	  Since there are major incompatibilities between the legacy ABI and
1574704bdda0SNicolas Pitre	  EABI, especially with regard to structure member alignment, this
1575704bdda0SNicolas Pitre	  option also changes the kernel syscall calling convention to
1576704bdda0SNicolas Pitre	  disambiguate both ABIs and allow for backward compatibility support
1577704bdda0SNicolas Pitre	  (selected with CONFIG_OABI_COMPAT).
1578704bdda0SNicolas Pitre
1579704bdda0SNicolas Pitre	  To use this you need GCC version 4.0.0 or later.
1580704bdda0SNicolas Pitre
15816c90c872SNicolas Pitreconfig OABI_COMPAT
1582a73a3ff1SRussell King	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1583d6f94fa0SKees Cook	depends on AEABI && !THUMB2_KERNEL
15846c90c872SNicolas Pitre	help
15856c90c872SNicolas Pitre	  This option preserves the old syscall interface along with the
15866c90c872SNicolas Pitre	  new (ARM EABI) one. It also provides a compatibility layer to
15876c90c872SNicolas Pitre	  intercept syscalls that have structure arguments which layout
15886c90c872SNicolas Pitre	  in memory differs between the legacy ABI and the new ARM EABI
15896c90c872SNicolas Pitre	  (only for non "thumb" binaries). This option adds a tiny
15906c90c872SNicolas Pitre	  overhead to all syscalls and produces a slightly larger kernel.
159191702175SKees Cook
159291702175SKees Cook	  The seccomp filter system will not be available when this is
159391702175SKees Cook	  selected, since there is no way yet to sensibly distinguish
159491702175SKees Cook	  between calling conventions during filtering.
159591702175SKees Cook
15966c90c872SNicolas Pitre	  If you know you'll be using only pure EABI user space then you
15976c90c872SNicolas Pitre	  can say N here. If this option is not selected and you attempt
15986c90c872SNicolas Pitre	  to execute a legacy ABI binary then the result will be
15996c90c872SNicolas Pitre	  UNPREDICTABLE (in fact it can be predicted that it won't work
1600b02f8467SKees Cook	  at all). If in doubt say N.
16016c90c872SNicolas Pitre
1602eb33575cSMel Gormanconfig ARCH_HAS_HOLES_MEMORYMODEL
1603e80d6a24SMel Gorman	bool
1604e80d6a24SMel Gorman
160505944d74SRussell Kingconfig ARCH_SPARSEMEM_ENABLE
160605944d74SRussell King	bool
160705944d74SRussell King
160807a2f737SRussell Kingconfig ARCH_SPARSEMEM_DEFAULT
160907a2f737SRussell King	def_bool ARCH_SPARSEMEM_ENABLE
161007a2f737SRussell King
161105944d74SRussell Kingconfig ARCH_SELECT_MEMORY_MODEL
1612be370302SRussell King	def_bool ARCH_SPARSEMEM_ENABLE
1613c80d79d7SYasunori Goto
16147b7bf499SWill Deaconconfig HAVE_ARCH_PFN_VALID
16157b7bf499SWill Deacon	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
16167b7bf499SWill Deacon
1617b8cd51afSSteve Capperconfig HAVE_GENERIC_RCU_GUP
1618b8cd51afSSteve Capper	def_bool y
1619b8cd51afSSteve Capper	depends on ARM_LPAE
1620b8cd51afSSteve Capper
1621053a96caSNicolas Pitreconfig HIGHMEM
1622e8db89a2SRussell King	bool "High Memory Support"
1623e8db89a2SRussell King	depends on MMU
1624053a96caSNicolas Pitre	help
1625053a96caSNicolas Pitre	  The address space of ARM processors is only 4 Gigabytes large
1626053a96caSNicolas Pitre	  and it has to accommodate user address space, kernel address
1627053a96caSNicolas Pitre	  space as well as some memory mapped IO. That means that, if you
1628053a96caSNicolas Pitre	  have a large amount of physical memory and/or IO, not all of the
1629053a96caSNicolas Pitre	  memory can be "permanently mapped" by the kernel. The physical
1630053a96caSNicolas Pitre	  memory that is not permanently mapped is called "high memory".
1631053a96caSNicolas Pitre
1632053a96caSNicolas Pitre	  Depending on the selected kernel/user memory split, minimum
1633053a96caSNicolas Pitre	  vmalloc space and actual amount of RAM, you may not need this
1634053a96caSNicolas Pitre	  option which should result in a slightly faster kernel.
1635053a96caSNicolas Pitre
1636053a96caSNicolas Pitre	  If unsure, say n.
1637053a96caSNicolas Pitre
163865cec8e3SRussell Kingconfig HIGHPTE
16399a431bd5SRussell King	bool "Allocate 2nd-level pagetables from highmem" if EXPERT
164065cec8e3SRussell King	depends on HIGHMEM
16419a431bd5SRussell King	default y
1642b4d103d1SRussell King	help
1643b4d103d1SRussell King	  The VM uses one page of physical memory for each page table.
1644b4d103d1SRussell King	  For systems with a lot of processes, this can use a lot of
1645b4d103d1SRussell King	  precious low memory, eventually leading to low memory being
1646b4d103d1SRussell King	  consumed by page tables.  Setting this option will allow
1647b4d103d1SRussell King	  user-space 2nd level page tables to reside in high memory.
164865cec8e3SRussell King
1649a5e090acSRussell Kingconfig CPU_SW_DOMAIN_PAN
1650a5e090acSRussell King	bool "Enable use of CPU domains to implement privileged no-access"
1651a5e090acSRussell King	depends on MMU && !ARM_LPAE
16521b8873a0SJamie Iles	default y
16531b8873a0SJamie Iles	help
1654a5e090acSRussell King	  Increase kernel security by ensuring that normal kernel accesses
1655a5e090acSRussell King	  are unable to access userspace addresses.  This can help prevent
1656a5e090acSRussell King	  use-after-free bugs becoming an exploitable privilege escalation
1657a5e090acSRussell King	  by ensuring that magic values (such as LIST_POISON) will always
1658a5e090acSRussell King	  fault when dereferenced.
1659a5e090acSRussell King
1660a5e090acSRussell King	  CPUs with low-vector mappings use a best-efforts implementation.
1661a5e090acSRussell King	  Their lower 1MB needs to remain accessible for the vectors, but
1662a5e090acSRussell King	  the remainder of userspace will become appropriately inaccessible.
16631da177e4SLinus Torvalds
16641da177e4SLinus Torvaldsconfig HW_PERF_EVENTS
1665fa8ad788SMark Rutland	def_bool y
1666fa8ad788SMark Rutland	depends on ARM_PMU
16671b8873a0SJamie Iles
16681355e2a6SCatalin Marinasconfig SYS_SUPPORTS_HUGETLBFS
16691355e2a6SCatalin Marinas       def_bool y
16701355e2a6SCatalin Marinas       depends on ARM_LPAE
16711355e2a6SCatalin Marinas
16728d962507SCatalin Marinasconfig HAVE_ARCH_TRANSPARENT_HUGEPAGE
16738d962507SCatalin Marinas       def_bool y
16748d962507SCatalin Marinas       depends on ARM_LPAE
16758d962507SCatalin Marinas
16764bfab203SSteven Capperconfig ARCH_WANT_GENERAL_HUGETLB
16774bfab203SSteven Capper	def_bool y
16784bfab203SSteven Capper
16797d485f64SArd Biesheuvelconfig ARM_MODULE_PLTS
16807d485f64SArd Biesheuvel	bool "Use PLTs to allow module memory to spill over into vmalloc area"
16817d485f64SArd Biesheuvel	depends on MODULES
16827d485f64SArd Biesheuvel	help
16837d485f64SArd Biesheuvel	  Allocate PLTs when loading modules so that jumps and calls whose
16847d485f64SArd Biesheuvel	  targets are too far away for their relative offsets to be encoded
16857d485f64SArd Biesheuvel	  in the instructions themselves can be bounced via veneers in the
16867d485f64SArd Biesheuvel	  module's PLT. This allows modules to be allocated in the generic
16877d485f64SArd Biesheuvel	  vmalloc area after the dedicated module memory area has been
16887d485f64SArd Biesheuvel	  exhausted. The modules will use slightly more memory, but after
16897d485f64SArd Biesheuvel	  rounding up to page size, the actual memory footprint is usually
16907d485f64SArd Biesheuvel	  the same.
16917d485f64SArd Biesheuvel
16927d485f64SArd Biesheuvel	  Say y if you are getting out of memory errors while loading modules
16937d485f64SArd Biesheuvel
16941da177e4SLinus Torvaldssource "mm/Kconfig"
16951da177e4SLinus Torvalds
1696c1b2d970SMagnus Dammconfig FORCE_MAX_ZONEORDER
169736d6c928SUlrich Hecht	int "Maximum zone order"
1698898f08e1SYegor Yefremov	default "12" if SOC_AM33XX
16996d85e2b0SUwe Kleine-König	default "9" if SA1111 || ARCH_EFM32
1700c1b2d970SMagnus Damm	default "11"
1701c1b2d970SMagnus Damm	help
1702c1b2d970SMagnus Damm	  The kernel memory allocator divides physically contiguous memory
1703c1b2d970SMagnus Damm	  blocks into "zones", where each zone is a power of two number of
1704c1b2d970SMagnus Damm	  pages.  This option selects the largest power of two that the kernel
1705c1b2d970SMagnus Damm	  keeps in the memory allocator.  If you need to allocate very large
1706c1b2d970SMagnus Damm	  blocks of physically contiguous memory, then you may need to
1707c1b2d970SMagnus Damm	  increase this value.
1708c1b2d970SMagnus Damm
1709c1b2d970SMagnus Damm	  This config option is actually maximum order plus one. For example,
1710c1b2d970SMagnus Damm	  a value of 11 means that the largest free memory block is 2^10 pages.
1711c1b2d970SMagnus Damm
17121da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP
17131da177e4SLinus Torvalds	bool
1714f12d0d7cSHyok S. Choi	depends on CPU_CP15_MMU
17151da177e4SLinus Torvalds	default y if !ARCH_EBSA110
1716e119bfffSRussell King	select HAVE_PROC_CPU if PROC_FS
17171da177e4SLinus Torvalds	help
17181da177e4SLinus Torvalds	  ARM processors cannot fetch/store information which is not
17191da177e4SLinus Torvalds	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
17201da177e4SLinus Torvalds	  address divisible by 4. On 32-bit ARM processors, these non-aligned
17211da177e4SLinus Torvalds	  fetch/store instructions will be emulated in software if you say
17221da177e4SLinus Torvalds	  here, which has a severe performance impact. This is necessary for
17231da177e4SLinus Torvalds	  correct operation of some network protocols. With an IP-only
17241da177e4SLinus Torvalds	  configuration it is safe to say N, otherwise say Y.
17251da177e4SLinus Torvalds
172639ec58f3SLennert Buytenhekconfig UACCESS_WITH_MEMCPY
172738ef2ad5SLinus Walleij	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
172838ef2ad5SLinus Walleij	depends on MMU
172939ec58f3SLennert Buytenhek	default y if CPU_FEROCEON
173039ec58f3SLennert Buytenhek	help
173139ec58f3SLennert Buytenhek	  Implement faster copy_to_user and clear_user methods for CPU
173239ec58f3SLennert Buytenhek	  cores where a 8-word STM instruction give significantly higher
173339ec58f3SLennert Buytenhek	  memory write throughput than a sequence of individual 32bit stores.
173439ec58f3SLennert Buytenhek
173539ec58f3SLennert Buytenhek	  A possible side effect is a slight increase in scheduling latency
173639ec58f3SLennert Buytenhek	  between threads sharing the same address space if they invoke
173739ec58f3SLennert Buytenhek	  such copy operations with large buffers.
173839ec58f3SLennert Buytenhek
173939ec58f3SLennert Buytenhek	  However, if the CPU data cache is using a write-allocate mode,
174039ec58f3SLennert Buytenhek	  this option is unlikely to provide any performance gain.
174139ec58f3SLennert Buytenhek
174270c70d97SNicolas Pitreconfig SECCOMP
174370c70d97SNicolas Pitre	bool
174470c70d97SNicolas Pitre	prompt "Enable seccomp to safely compute untrusted bytecode"
174570c70d97SNicolas Pitre	---help---
174670c70d97SNicolas Pitre	  This kernel feature is useful for number crunching applications
174770c70d97SNicolas Pitre	  that may need to compute untrusted bytecode during their
174870c70d97SNicolas Pitre	  execution. By using pipes or other transports made available to
174970c70d97SNicolas Pitre	  the process as file descriptors supporting the read/write
175070c70d97SNicolas Pitre	  syscalls, it's possible to isolate those applications in
175170c70d97SNicolas Pitre	  their own address space using seccomp. Once seccomp is
175270c70d97SNicolas Pitre	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
175370c70d97SNicolas Pitre	  and the task is only allowed to execute a few safe syscalls
175470c70d97SNicolas Pitre	  defined by each seccomp mode.
175570c70d97SNicolas Pitre
175606e6295bSStefano Stabelliniconfig SWIOTLB
175706e6295bSStefano Stabellini	def_bool y
175806e6295bSStefano Stabellini
175906e6295bSStefano Stabelliniconfig IOMMU_HELPER
176006e6295bSStefano Stabellini	def_bool SWIOTLB
176106e6295bSStefano Stabellini
176202c2433bSStefano Stabelliniconfig PARAVIRT
176302c2433bSStefano Stabellini	bool "Enable paravirtualization code"
176402c2433bSStefano Stabellini	help
176502c2433bSStefano Stabellini	  This changes the kernel so it can modify itself when it is run
176602c2433bSStefano Stabellini	  under a hypervisor, potentially improving performance significantly
176702c2433bSStefano Stabellini	  over full virtualization.
176802c2433bSStefano Stabellini
176902c2433bSStefano Stabelliniconfig PARAVIRT_TIME_ACCOUNTING
177002c2433bSStefano Stabellini	bool "Paravirtual steal time accounting"
177102c2433bSStefano Stabellini	select PARAVIRT
177202c2433bSStefano Stabellini	default n
177302c2433bSStefano Stabellini	help
177402c2433bSStefano Stabellini	  Select this option to enable fine granularity task steal time
177502c2433bSStefano Stabellini	  accounting. Time spent executing other tasks in parallel with
177602c2433bSStefano Stabellini	  the current vCPU is discounted from the vCPU power. To account for
177702c2433bSStefano Stabellini	  that, there can be a small performance impact.
177802c2433bSStefano Stabellini
177902c2433bSStefano Stabellini	  If in doubt, say N here.
178002c2433bSStefano Stabellini
1781eff8d644SStefano Stabelliniconfig XEN_DOM0
1782eff8d644SStefano Stabellini	def_bool y
1783eff8d644SStefano Stabellini	depends on XEN
1784eff8d644SStefano Stabellini
1785eff8d644SStefano Stabelliniconfig XEN
1786c2ba1f7dSJulien Grall	bool "Xen guest support on ARM"
178785323a99SIan Campbell	depends on ARM && AEABI && OF
1788f880b67dSArnd Bergmann	depends on CPU_V7 && !CPU_V6
178985323a99SIan Campbell	depends on !GENERIC_ATOMIC64
17907693deccSUwe Kleine-König	depends on MMU
179151aaf81fSRussell King	select ARCH_DMA_ADDR_T_64BIT
179217b7ab80SStefano Stabellini	select ARM_PSCI
179383862ccfSStefano Stabellini	select SWIOTLB_XEN
179402c2433bSStefano Stabellini	select PARAVIRT
1795eff8d644SStefano Stabellini	help
1796eff8d644SStefano Stabellini	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1797eff8d644SStefano Stabellini
17981da177e4SLinus Torvaldsendmenu
17991da177e4SLinus Torvalds
18001da177e4SLinus Torvaldsmenu "Boot options"
18011da177e4SLinus Torvalds
18029eb8f674SGrant Likelyconfig USE_OF
18039eb8f674SGrant Likely	bool "Flattened Device Tree support"
1804b1b3f49cSRussell King	select IRQ_DOMAIN
18059eb8f674SGrant Likely	select OF
18069eb8f674SGrant Likely	help
18079eb8f674SGrant Likely	  Include support for flattened device tree machine descriptions.
18089eb8f674SGrant Likely
1809bd51e2f5SNicolas Pitreconfig ATAGS
1810bd51e2f5SNicolas Pitre	bool "Support for the traditional ATAGS boot data passing" if USE_OF
1811bd51e2f5SNicolas Pitre	default y
1812bd51e2f5SNicolas Pitre	help
1813bd51e2f5SNicolas Pitre	  This is the traditional way of passing data to the kernel at boot
1814bd51e2f5SNicolas Pitre	  time. If you are solely relying on the flattened device tree (or
1815bd51e2f5SNicolas Pitre	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1816bd51e2f5SNicolas Pitre	  to remove ATAGS support from your kernel binary.  If unsure,
1817bd51e2f5SNicolas Pitre	  leave this to y.
1818bd51e2f5SNicolas Pitre
1819bd51e2f5SNicolas Pitreconfig DEPRECATED_PARAM_STRUCT
1820bd51e2f5SNicolas Pitre	bool "Provide old way to pass kernel parameters"
1821bd51e2f5SNicolas Pitre	depends on ATAGS
1822bd51e2f5SNicolas Pitre	help
1823bd51e2f5SNicolas Pitre	  This was deprecated in 2001 and announced to live on for 5 years.
1824bd51e2f5SNicolas Pitre	  Some old boot loaders still use this way.
1825bd51e2f5SNicolas Pitre
18261da177e4SLinus Torvalds# Compressed boot loader in ROM.  Yes, we really want to ask about
18271da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files.
18281da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT
18291da177e4SLinus Torvalds	hex "Compressed ROM boot loader base address"
18301da177e4SLinus Torvalds	default "0"
18311da177e4SLinus Torvalds	help
18321da177e4SLinus Torvalds	  The physical address at which the ROM-able zImage is to be
18331da177e4SLinus Torvalds	  placed in the target.  Platforms which normally make use of
18341da177e4SLinus Torvalds	  ROM-able zImage formats normally set this to a suitable
18351da177e4SLinus Torvalds	  value in their defconfig file.
18361da177e4SLinus Torvalds
18371da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
18381da177e4SLinus Torvalds
18391da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS
18401da177e4SLinus Torvalds	hex "Compressed ROM boot loader BSS address"
18411da177e4SLinus Torvalds	default "0"
18421da177e4SLinus Torvalds	help
1843f8c440b2SDan Fandrich	  The base address of an area of read/write memory in the target
1844f8c440b2SDan Fandrich	  for the ROM-able zImage which must be available while the
1845f8c440b2SDan Fandrich	  decompressor is running. It must be large enough to hold the
1846f8c440b2SDan Fandrich	  entire decompressed kernel plus an additional 128 KiB.
1847f8c440b2SDan Fandrich	  Platforms which normally make use of ROM-able zImage formats
1848f8c440b2SDan Fandrich	  normally set this to a suitable value in their defconfig file.
18491da177e4SLinus Torvalds
18501da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
18511da177e4SLinus Torvalds
18521da177e4SLinus Torvaldsconfig ZBOOT_ROM
18531da177e4SLinus Torvalds	bool "Compressed boot loader in ROM/flash"
18541da177e4SLinus Torvalds	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
185510968131SRussell King	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
18561da177e4SLinus Torvalds	help
18571da177e4SLinus Torvalds	  Say Y here if you intend to execute your compressed kernel image
18581da177e4SLinus Torvalds	  (zImage) directly from ROM or flash.  If unsure, say N.
18591da177e4SLinus Torvalds
1860e2a6a3aaSJohn Bonesioconfig ARM_APPENDED_DTB
1861e2a6a3aaSJohn Bonesio	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
186210968131SRussell King	depends on OF
1863e2a6a3aaSJohn Bonesio	help
1864e2a6a3aaSJohn Bonesio	  With this option, the boot code will look for a device tree binary
1865e2a6a3aaSJohn Bonesio	  (DTB) appended to zImage
1866e2a6a3aaSJohn Bonesio	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1867e2a6a3aaSJohn Bonesio
1868e2a6a3aaSJohn Bonesio	  This is meant as a backward compatibility convenience for those
1869e2a6a3aaSJohn Bonesio	  systems with a bootloader that can't be upgraded to accommodate
1870e2a6a3aaSJohn Bonesio	  the documented boot protocol using a device tree.
1871e2a6a3aaSJohn Bonesio
1872e2a6a3aaSJohn Bonesio	  Beware that there is very little in terms of protection against
1873e2a6a3aaSJohn Bonesio	  this option being confused by leftover garbage in memory that might
1874e2a6a3aaSJohn Bonesio	  look like a DTB header after a reboot if no actual DTB is appended
1875e2a6a3aaSJohn Bonesio	  to zImage.  Do not leave this option active in a production kernel
1876e2a6a3aaSJohn Bonesio	  if you don't intend to always append a DTB.  Proper passing of the
1877e2a6a3aaSJohn Bonesio	  location into r2 of a bootloader provided DTB is always preferable
1878e2a6a3aaSJohn Bonesio	  to this option.
1879e2a6a3aaSJohn Bonesio
1880b90b9a38SNicolas Pitreconfig ARM_ATAG_DTB_COMPAT
1881b90b9a38SNicolas Pitre	bool "Supplement the appended DTB with traditional ATAG information"
1882b90b9a38SNicolas Pitre	depends on ARM_APPENDED_DTB
1883b90b9a38SNicolas Pitre	help
1884b90b9a38SNicolas Pitre	  Some old bootloaders can't be updated to a DTB capable one, yet
1885b90b9a38SNicolas Pitre	  they provide ATAGs with memory configuration, the ramdisk address,
1886b90b9a38SNicolas Pitre	  the kernel cmdline string, etc.  Such information is dynamically
1887b90b9a38SNicolas Pitre	  provided by the bootloader and can't always be stored in a static
1888b90b9a38SNicolas Pitre	  DTB.  To allow a device tree enabled kernel to be used with such
1889b90b9a38SNicolas Pitre	  bootloaders, this option allows zImage to extract the information
1890b90b9a38SNicolas Pitre	  from the ATAG list and store it at run time into the appended DTB.
1891b90b9a38SNicolas Pitre
1892d0f34a11SGenoud Richardchoice
1893d0f34a11SGenoud Richard	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1894d0f34a11SGenoud Richard	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1895d0f34a11SGenoud Richard
1896d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1897d0f34a11SGenoud Richard	bool "Use bootloader kernel arguments if available"
1898d0f34a11SGenoud Richard	help
1899d0f34a11SGenoud Richard	  Uses the command-line options passed by the boot loader instead of
1900d0f34a11SGenoud Richard	  the device tree bootargs property. If the boot loader doesn't provide
1901d0f34a11SGenoud Richard	  any, the device tree bootargs property will be used.
1902d0f34a11SGenoud Richard
1903d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1904d0f34a11SGenoud Richard	bool "Extend with bootloader kernel arguments"
1905d0f34a11SGenoud Richard	help
1906d0f34a11SGenoud Richard	  The command-line arguments provided by the boot loader will be
1907d0f34a11SGenoud Richard	  appended to the the device tree bootargs property.
1908d0f34a11SGenoud Richard
1909d0f34a11SGenoud Richardendchoice
1910d0f34a11SGenoud Richard
19111da177e4SLinus Torvaldsconfig CMDLINE
19121da177e4SLinus Torvalds	string "Default kernel command string"
19131da177e4SLinus Torvalds	default ""
19141da177e4SLinus Torvalds	help
19151da177e4SLinus Torvalds	  On some architectures (EBSA110 and CATS), there is currently no way
19161da177e4SLinus Torvalds	  for the boot loader to pass arguments to the kernel. For these
19171da177e4SLinus Torvalds	  architectures, you should supply some command-line options at build
19181da177e4SLinus Torvalds	  time by entering them here. As a minimum, you should specify the
19191da177e4SLinus Torvalds	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
19201da177e4SLinus Torvalds
19214394c124SVictor Boiviechoice
19224394c124SVictor Boivie	prompt "Kernel command line type" if CMDLINE != ""
19234394c124SVictor Boivie	default CMDLINE_FROM_BOOTLOADER
1924bd51e2f5SNicolas Pitre	depends on ATAGS
19254394c124SVictor Boivie
19264394c124SVictor Boivieconfig CMDLINE_FROM_BOOTLOADER
19274394c124SVictor Boivie	bool "Use bootloader kernel arguments if available"
19284394c124SVictor Boivie	help
19294394c124SVictor Boivie	  Uses the command-line options passed by the boot loader. If
19304394c124SVictor Boivie	  the boot loader doesn't provide any, the default kernel command
19314394c124SVictor Boivie	  string provided in CMDLINE will be used.
19324394c124SVictor Boivie
19334394c124SVictor Boivieconfig CMDLINE_EXTEND
19344394c124SVictor Boivie	bool "Extend bootloader kernel arguments"
19354394c124SVictor Boivie	help
19364394c124SVictor Boivie	  The command-line arguments provided by the boot loader will be
19374394c124SVictor Boivie	  appended to the default kernel command string.
19384394c124SVictor Boivie
193992d2040dSAlexander Hollerconfig CMDLINE_FORCE
194092d2040dSAlexander Holler	bool "Always use the default kernel command string"
194192d2040dSAlexander Holler	help
194292d2040dSAlexander Holler	  Always use the default kernel command string, even if the boot
194392d2040dSAlexander Holler	  loader passes other arguments to the kernel.
194492d2040dSAlexander Holler	  This is useful if you cannot or don't want to change the
194592d2040dSAlexander Holler	  command-line options your boot loader passes to the kernel.
19464394c124SVictor Boivieendchoice
194792d2040dSAlexander Holler
19481da177e4SLinus Torvaldsconfig XIP_KERNEL
19491da177e4SLinus Torvalds	bool "Kernel Execute-In-Place from ROM"
195010968131SRussell King	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
19511da177e4SLinus Torvalds	help
19521da177e4SLinus Torvalds	  Execute-In-Place allows the kernel to run from non-volatile storage
19531da177e4SLinus Torvalds	  directly addressable by the CPU, such as NOR flash. This saves RAM
19541da177e4SLinus Torvalds	  space since the text section of the kernel is not loaded from flash
19551da177e4SLinus Torvalds	  to RAM.  Read-write sections, such as the data section and stack,
19561da177e4SLinus Torvalds	  are still copied to RAM.  The XIP kernel is not compressed since
19571da177e4SLinus Torvalds	  it has to run directly from flash, so it will take more space to
19581da177e4SLinus Torvalds	  store it.  The flash address used to link the kernel object files,
19591da177e4SLinus Torvalds	  and for storing it, is configuration dependent. Therefore, if you
19601da177e4SLinus Torvalds	  say Y here, you must know the proper physical address where to
19611da177e4SLinus Torvalds	  store the kernel image depending on your own flash memory usage.
19621da177e4SLinus Torvalds
19631da177e4SLinus Torvalds	  Also note that the make target becomes "make xipImage" rather than
19641da177e4SLinus Torvalds	  "make zImage" or "make Image".  The final kernel binary to put in
19651da177e4SLinus Torvalds	  ROM memory will be arch/arm/boot/xipImage.
19661da177e4SLinus Torvalds
19671da177e4SLinus Torvalds	  If unsure, say N.
19681da177e4SLinus Torvalds
19691da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR
19701da177e4SLinus Torvalds	hex "XIP Kernel Physical Location"
19711da177e4SLinus Torvalds	depends on XIP_KERNEL
19721da177e4SLinus Torvalds	default "0x00080000"
19731da177e4SLinus Torvalds	help
19741da177e4SLinus Torvalds	  This is the physical address in your flash memory the kernel will
19751da177e4SLinus Torvalds	  be linked for and stored to.  This address is dependent on your
19761da177e4SLinus Torvalds	  own flash usage.
19771da177e4SLinus Torvalds
1978c587e4a6SRichard Purdieconfig KEXEC
1979c587e4a6SRichard Purdie	bool "Kexec system call (EXPERIMENTAL)"
198019ab428fSStephen Warren	depends on (!SMP || PM_SLEEP_SMP)
1981cb1293e2SArnd Bergmann	depends on !CPU_V7M
19822965faa5SDave Young	select KEXEC_CORE
1983c587e4a6SRichard Purdie	help
1984c587e4a6SRichard Purdie	  kexec is a system call that implements the ability to shutdown your
1985c587e4a6SRichard Purdie	  current kernel, and to start another kernel.  It is like a reboot
198601dd2fbfSMatt LaPlante	  but it is independent of the system firmware.   And like a reboot
1987c587e4a6SRichard Purdie	  you can start any kernel with it, not just Linux.
1988c587e4a6SRichard Purdie
1989c587e4a6SRichard Purdie	  It is an ongoing process to be certain the hardware in a machine
1990c587e4a6SRichard Purdie	  is properly shutdown, so do not be surprised if this code does not
1991bf220695SGeert Uytterhoeven	  initially work for you.
1992c587e4a6SRichard Purdie
19934cd9d6f7SRichard Purdieconfig ATAGS_PROC
19944cd9d6f7SRichard Purdie	bool "Export atags in procfs"
1995bd51e2f5SNicolas Pitre	depends on ATAGS && KEXEC
1996b98d7291SUli Luckas	default y
19974cd9d6f7SRichard Purdie	help
19984cd9d6f7SRichard Purdie	  Should the atags used to boot the kernel be exported in an "atags"
19994cd9d6f7SRichard Purdie	  file in procfs. Useful with kexec.
20004cd9d6f7SRichard Purdie
2001cb5d39b3SMika Westerbergconfig CRASH_DUMP
2002cb5d39b3SMika Westerberg	bool "Build kdump crash kernel (EXPERIMENTAL)"
2003cb5d39b3SMika Westerberg	help
2004cb5d39b3SMika Westerberg	  Generate crash dump after being started by kexec. This should
2005cb5d39b3SMika Westerberg	  be normally only set in special crash dump kernels which are
2006cb5d39b3SMika Westerberg	  loaded in the main kernel with kexec-tools into a specially
2007cb5d39b3SMika Westerberg	  reserved region and then later executed after a crash by
2008cb5d39b3SMika Westerberg	  kdump/kexec. The crash dump kernel must be compiled to a
2009cb5d39b3SMika Westerberg	  memory address not used by the main kernel
2010cb5d39b3SMika Westerberg
2011cb5d39b3SMika Westerberg	  For more details see Documentation/kdump/kdump.txt
2012cb5d39b3SMika Westerberg
2013e69edc79SEric Miaoconfig AUTO_ZRELADDR
2014e69edc79SEric Miao	bool "Auto calculation of the decompressed kernel image address"
2015e69edc79SEric Miao	help
2016e69edc79SEric Miao	  ZRELADDR is the physical address where the decompressed kernel
2017e69edc79SEric Miao	  image will be placed. If AUTO_ZRELADDR is selected, the address
2018e69edc79SEric Miao	  will be determined at run-time by masking the current IP with
2019e69edc79SEric Miao	  0xf8000000. This assumes the zImage being placed in the first 128MB
2020e69edc79SEric Miao	  from start of memory.
2021e69edc79SEric Miao
202281a0bc39SRoy Franzconfig EFI_STUB
202381a0bc39SRoy Franz	bool
202481a0bc39SRoy Franz
202581a0bc39SRoy Franzconfig EFI
202681a0bc39SRoy Franz	bool "UEFI runtime support"
202781a0bc39SRoy Franz	depends on OF && !CPU_BIG_ENDIAN && MMU && AUTO_ZRELADDR && !XIP_KERNEL
202881a0bc39SRoy Franz	select UCS2_STRING
202981a0bc39SRoy Franz	select EFI_PARAMS_FROM_FDT
203081a0bc39SRoy Franz	select EFI_STUB
203181a0bc39SRoy Franz	select EFI_ARMSTUB
203281a0bc39SRoy Franz	select EFI_RUNTIME_WRAPPERS
203381a0bc39SRoy Franz	---help---
203481a0bc39SRoy Franz	  This option provides support for runtime services provided
203581a0bc39SRoy Franz	  by UEFI firmware (such as non-volatile variables, realtime
203681a0bc39SRoy Franz	  clock, and platform reset). A UEFI stub is also provided to
203781a0bc39SRoy Franz	  allow the kernel to be booted as an EFI application. This
203881a0bc39SRoy Franz	  is only useful for kernels that may run on systems that have
203981a0bc39SRoy Franz	  UEFI firmware.
204081a0bc39SRoy Franz
20411da177e4SLinus Torvaldsendmenu
20421da177e4SLinus Torvalds
2043ac9d7efcSRussell Kingmenu "CPU Power Management"
20441da177e4SLinus Torvalds
20451da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig"
20461da177e4SLinus Torvalds
2047ac9d7efcSRussell Kingsource "drivers/cpuidle/Kconfig"
2048ac9d7efcSRussell King
2049ac9d7efcSRussell Kingendmenu
2050ac9d7efcSRussell King
20511da177e4SLinus Torvaldsmenu "Floating point emulation"
20521da177e4SLinus Torvalds
20531da177e4SLinus Torvaldscomment "At least one emulation must be selected"
20541da177e4SLinus Torvalds
20551da177e4SLinus Torvaldsconfig FPE_NWFPE
20561da177e4SLinus Torvalds	bool "NWFPE math emulation"
2057593c252aSDave Martin	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
20581da177e4SLinus Torvalds	---help---
20591da177e4SLinus Torvalds	  Say Y to include the NWFPE floating point emulator in the kernel.
20601da177e4SLinus Torvalds	  This is necessary to run most binaries. Linux does not currently
20611da177e4SLinus Torvalds	  support floating point hardware so you need to say Y here even if
20621da177e4SLinus Torvalds	  your machine has an FPA or floating point co-processor podule.
20631da177e4SLinus Torvalds
20641da177e4SLinus Torvalds	  You may say N here if you are going to load the Acorn FPEmulator
20651da177e4SLinus Torvalds	  early in the bootup.
20661da177e4SLinus Torvalds
20671da177e4SLinus Torvaldsconfig FPE_NWFPE_XP
20681da177e4SLinus Torvalds	bool "Support extended precision"
2069bedf142bSLennert Buytenhek	depends on FPE_NWFPE
20701da177e4SLinus Torvalds	help
20711da177e4SLinus Torvalds	  Say Y to include 80-bit support in the kernel floating-point
20721da177e4SLinus Torvalds	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
20731da177e4SLinus Torvalds	  Note that gcc does not generate 80-bit operations by default,
20741da177e4SLinus Torvalds	  so in most cases this option only enlarges the size of the
20751da177e4SLinus Torvalds	  floating point emulator without any good reason.
20761da177e4SLinus Torvalds
20771da177e4SLinus Torvalds	  You almost surely want to say N here.
20781da177e4SLinus Torvalds
20791da177e4SLinus Torvaldsconfig FPE_FASTFPE
20801da177e4SLinus Torvalds	bool "FastFPE math emulation (EXPERIMENTAL)"
2081d6f94fa0SKees Cook	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
20821da177e4SLinus Torvalds	---help---
20831da177e4SLinus Torvalds	  Say Y here to include the FAST floating point emulator in the kernel.
20841da177e4SLinus Torvalds	  This is an experimental much faster emulator which now also has full
20851da177e4SLinus Torvalds	  precision for the mantissa.  It does not support any exceptions.
20861da177e4SLinus Torvalds	  It is very simple, and approximately 3-6 times faster than NWFPE.
20871da177e4SLinus Torvalds
20881da177e4SLinus Torvalds	  It should be sufficient for most programs.  It may be not suitable
20891da177e4SLinus Torvalds	  for scientific calculations, but you have to check this for yourself.
20901da177e4SLinus Torvalds	  If you do not feel you need a faster FP emulation you should better
20911da177e4SLinus Torvalds	  choose NWFPE.
20921da177e4SLinus Torvalds
20931da177e4SLinus Torvaldsconfig VFP
20941da177e4SLinus Torvalds	bool "VFP-format floating point maths"
2095e399b1a4SRussell King	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
20961da177e4SLinus Torvalds	help
20971da177e4SLinus Torvalds	  Say Y to include VFP support code in the kernel. This is needed
20981da177e4SLinus Torvalds	  if your hardware includes a VFP unit.
20991da177e4SLinus Torvalds
21001da177e4SLinus Torvalds	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
21011da177e4SLinus Torvalds	  release notes and additional status information.
21021da177e4SLinus Torvalds
21031da177e4SLinus Torvalds	  Say N if your target does not have VFP hardware.
21041da177e4SLinus Torvalds
210525ebee02SCatalin Marinasconfig VFPv3
210625ebee02SCatalin Marinas	bool
210725ebee02SCatalin Marinas	depends on VFP
210825ebee02SCatalin Marinas	default y if CPU_V7
210925ebee02SCatalin Marinas
2110b5872db4SCatalin Marinasconfig NEON
2111b5872db4SCatalin Marinas	bool "Advanced SIMD (NEON) Extension support"
2112b5872db4SCatalin Marinas	depends on VFPv3 && CPU_V7
2113b5872db4SCatalin Marinas	help
2114b5872db4SCatalin Marinas	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2115b5872db4SCatalin Marinas	  Extension.
2116b5872db4SCatalin Marinas
211773c132c1SArd Biesheuvelconfig KERNEL_MODE_NEON
211873c132c1SArd Biesheuvel	bool "Support for NEON in kernel mode"
2119c4a30c3bSRussell King	depends on NEON && AEABI
212073c132c1SArd Biesheuvel	help
212173c132c1SArd Biesheuvel	  Say Y to include support for NEON in kernel mode.
212273c132c1SArd Biesheuvel
21231da177e4SLinus Torvaldsendmenu
21241da177e4SLinus Torvalds
21251da177e4SLinus Torvaldsmenu "Userspace binary formats"
21261da177e4SLinus Torvalds
21271da177e4SLinus Torvaldssource "fs/Kconfig.binfmt"
21281da177e4SLinus Torvalds
21291da177e4SLinus Torvaldsendmenu
21301da177e4SLinus Torvalds
21311da177e4SLinus Torvaldsmenu "Power management options"
21321da177e4SLinus Torvalds
2133eceab4acSRussell Kingsource "kernel/power/Kconfig"
21341da177e4SLinus Torvalds
2135f4cb5700SJohannes Bergconfig ARCH_SUSPEND_POSSIBLE
213619a0519dSEzequiel Garcia	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2137f0d75153SUwe Kleine-König		CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
2138f4cb5700SJohannes Berg	def_bool y
2139f4cb5700SJohannes Berg
214015e0d9e3SArnd Bergmannconfig ARM_CPU_SUSPEND
21418b6f2499SLorenzo Pieralisi	def_bool PM_SLEEP || BL_SWITCHER || ARM_PSCI_FW
21421b9bdf5cSLorenzo Pieralisi	depends on ARCH_SUSPEND_POSSIBLE
214315e0d9e3SArnd Bergmann
2144603fb42aSSebastian Capellaconfig ARCH_HIBERNATION_POSSIBLE
2145603fb42aSSebastian Capella	bool
2146603fb42aSSebastian Capella	depends on MMU
2147603fb42aSSebastian Capella	default y if ARCH_SUSPEND_POSSIBLE
2148603fb42aSSebastian Capella
21491da177e4SLinus Torvaldsendmenu
21501da177e4SLinus Torvalds
2151d5950b43SSam Ravnborgsource "net/Kconfig"
2152d5950b43SSam Ravnborg
2153ac25150fSUwe Kleine-Königsource "drivers/Kconfig"
21541da177e4SLinus Torvalds
2155916f743dSKumar Galasource "drivers/firmware/Kconfig"
2156916f743dSKumar Gala
21571da177e4SLinus Torvaldssource "fs/Kconfig"
21581da177e4SLinus Torvalds
21591da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug"
21601da177e4SLinus Torvalds
21611da177e4SLinus Torvaldssource "security/Kconfig"
21621da177e4SLinus Torvalds
21631da177e4SLinus Torvaldssource "crypto/Kconfig"
2164652ccae5SArd Biesheuvelif CRYPTO
2165652ccae5SArd Biesheuvelsource "arch/arm/crypto/Kconfig"
2166652ccae5SArd Biesheuvelendif
21671da177e4SLinus Torvalds
21681da177e4SLinus Torvaldssource "lib/Kconfig"
2169749cf76cSChristoffer Dall
2170749cf76cSChristoffer Dallsource "arch/arm/kvm/Kconfig"
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