11da177e4SLinus Torvaldsconfig ARM 21da177e4SLinus Torvalds bool 31da177e4SLinus Torvalds default y 4b1b3f49cSRussell King select ARCH_BINFMT_ELF_RANDOMIZE_PIE 57463449bSCatalin Marinas select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 63d06770eSMark Rutland select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 7171b3f0dSRussell King select ARCH_HAVE_CUSTOM_GPIO_H 8d7018848SMark Salter select ARCH_MIGHT_HAVE_PC_PARPORT 94badad35SPeter Zijlstra select ARCH_SUPPORTS_ATOMIC_RMW 10017f161aSKim Phillips select ARCH_USE_BUILTIN_BSWAP 110cbad9c9SWill Deacon select ARCH_USE_CMPXCHG_LOCKREF 12b1b3f49cSRussell King select ARCH_WANT_IPC_PARSE_VERSION 13ee951c63SStephen Boyd select BUILDTIME_EXTABLE_SORT if MMU 14171b3f0dSRussell King select CLONE_BACKWARDS 15b1b3f49cSRussell King select CPU_PM if (SUSPEND || CPU_IDLE) 16dce5c9e3SWill Deacon select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS 174477ca45SUwe Kleine-König select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI) 18b1b3f49cSRussell King select GENERIC_CLOCKEVENTS_BROADCAST if SMP 19171b3f0dSRussell King select GENERIC_IDLE_POLL_SETUP 20b1b3f49cSRussell King select GENERIC_IRQ_PROBE 21b1b3f49cSRussell King select GENERIC_IRQ_SHOW 22b1b3f49cSRussell King select GENERIC_PCI_IOMAP 2338ff87f7SStephen Boyd select GENERIC_SCHED_CLOCK 24b1b3f49cSRussell King select GENERIC_SMP_IDLE_THREAD 25b1b3f49cSRussell King select GENERIC_STRNCPY_FROM_USER 26b1b3f49cSRussell King select GENERIC_STRNLEN_USER 27*a71b092aSMarc Zyngier select HANDLE_DOMAIN_IRQ 28b1b3f49cSRussell King select HARDIRQS_SW_RESEND 297a017721SAKASHI Takahiro select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT) 3009f05d85SRabin Vincent select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL 315cbad0ebSJason Wessel select HAVE_ARCH_KGDB 3291702175SKees Cook select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) 330693bf68SWade Farnsworth select HAVE_ARCH_TRACEHOOK 34b1b3f49cSRussell King select HAVE_BPF_JIT 3551aaf81fSRussell King select HAVE_CC_STACKPROTECTOR 36171b3f0dSRussell King select HAVE_CONTEXT_TRACKING 37b1b3f49cSRussell King select HAVE_C_RECORDMCOUNT 38b1b3f49cSRussell King select HAVE_DEBUG_KMEMLEAK 39b1b3f49cSRussell King select HAVE_DMA_API_DEBUG 40b1b3f49cSRussell King select HAVE_DMA_ATTRS 41b1b3f49cSRussell King select HAVE_DMA_CONTIGUOUS if MMU 42b1b3f49cSRussell King select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) 43dce5c9e3SWill Deacon select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU 44b1b3f49cSRussell King select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) 45b1b3f49cSRussell King select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) 46b1b3f49cSRussell King select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) 47b1b3f49cSRussell King select HAVE_GENERIC_DMA_COHERENT 48b1b3f49cSRussell King select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7)) 49b1b3f49cSRussell King select HAVE_IDE if PCI || ISA || PCMCIA 5087c46b6cSRussell King select HAVE_IRQ_TIME_ACCOUNTING 51b1b3f49cSRussell King select HAVE_KERNEL_GZIP 52f9b493acSKyungsik Lee select HAVE_KERNEL_LZ4 53b1b3f49cSRussell King select HAVE_KERNEL_LZMA 54b1b3f49cSRussell King select HAVE_KERNEL_LZO 55b1b3f49cSRussell King select HAVE_KERNEL_XZ 56856bc356SJon Medhurst select HAVE_KPROBES if !XIP_KERNEL 579edddaa2SAnanth N Mavinakayanahalli select HAVE_KRETPROBES if (HAVE_KPROBES) 58b1b3f49cSRussell King select HAVE_MEMBLOCK 59171b3f0dSRussell King select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND 60b1b3f49cSRussell King select HAVE_OPROFILE if (HAVE_PERF_EVENTS) 617ada189fSJamie Iles select HAVE_PERF_EVENTS 6249863894SWill Deacon select HAVE_PERF_REGS 6349863894SWill Deacon select HAVE_PERF_USER_STACK_DUMP 64e513f8bfSWill Deacon select HAVE_REGS_AND_STACK_ACCESS_API 65b1b3f49cSRussell King select HAVE_SYSCALL_TRACEPOINTS 66af1839ebSCatalin Marinas select HAVE_UID16 6731c1fc81SKevin Hilman select HAVE_VIRT_CPU_ACCOUNTING_GEN 68da0ec6f7SThomas Gleixner select IRQ_FORCED_THREADING 69171b3f0dSRussell King select MODULES_USE_ELF_REL 7084f452b1SSantosh Shilimkar select NO_BOOTMEM 71171b3f0dSRussell King select OLD_SIGACTION 72171b3f0dSRussell King select OLD_SIGSUSPEND3 73b1b3f49cSRussell King select PERF_USE_VMALLOC 74b1b3f49cSRussell King select RTC_LIB 75b1b3f49cSRussell King select SYS_SUPPORTS_APM_EMULATION 76171b3f0dSRussell King # Above selects are sorted alphabetically; please add new ones 77171b3f0dSRussell King # according to that. Thanks. 781da177e4SLinus Torvalds help 791da177e4SLinus Torvalds The ARM series is a line of low-power-consumption RISC chip designs 80f6c8965aSMartin Michlmayr licensed by ARM Ltd and targeted at embedded applications and 811da177e4SLinus Torvalds handhelds such as the Compaq IPAQ. ARM-based PCs are no longer 821da177e4SLinus Torvalds manufactured, but legacy ARM-based PC hardware remains popular in 831da177e4SLinus Torvalds Europe. There is an ARM Linux project with a web page at 841da177e4SLinus Torvalds <http://www.arm.linux.org.uk/>. 851da177e4SLinus Torvalds 8674facffeSRussell Kingconfig ARM_HAS_SG_CHAIN 87308c09f1SLaura Abbott select ARCH_HAS_SG_CHAIN 8874facffeSRussell King bool 8974facffeSRussell King 904ce63fcdSMarek Szyprowskiconfig NEED_SG_DMA_LENGTH 914ce63fcdSMarek Szyprowski bool 924ce63fcdSMarek Szyprowski 934ce63fcdSMarek Szyprowskiconfig ARM_DMA_USE_IOMMU 944ce63fcdSMarek Szyprowski bool 95b1b3f49cSRussell King select ARM_HAS_SG_CHAIN 96b1b3f49cSRussell King select NEED_SG_DMA_LENGTH 974ce63fcdSMarek Szyprowski 9860460abfSSeung-Woo Kimif ARM_DMA_USE_IOMMU 9960460abfSSeung-Woo Kim 10060460abfSSeung-Woo Kimconfig ARM_DMA_IOMMU_ALIGNMENT 10160460abfSSeung-Woo Kim int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers" 10260460abfSSeung-Woo Kim range 4 9 10360460abfSSeung-Woo Kim default 8 10460460abfSSeung-Woo Kim help 10560460abfSSeung-Woo Kim DMA mapping framework by default aligns all buffers to the smallest 10660460abfSSeung-Woo Kim PAGE_SIZE order which is greater than or equal to the requested buffer 10760460abfSSeung-Woo Kim size. This works well for buffers up to a few hundreds kilobytes, but 10860460abfSSeung-Woo Kim for larger buffers it just a waste of address space. Drivers which has 10960460abfSSeung-Woo Kim relatively small addressing window (like 64Mib) might run out of 11060460abfSSeung-Woo Kim virtual space with just a few allocations. 11160460abfSSeung-Woo Kim 11260460abfSSeung-Woo Kim With this parameter you can specify the maximum PAGE_SIZE order for 11360460abfSSeung-Woo Kim DMA IOMMU buffers. Larger buffers will be aligned only to this 11460460abfSSeung-Woo Kim specified order. The order is expressed as a power of two multiplied 11560460abfSSeung-Woo Kim by the PAGE_SIZE. 11660460abfSSeung-Woo Kim 11760460abfSSeung-Woo Kimendif 11860460abfSSeung-Woo Kim 1190b05da72SHans Ulli Krollconfig MIGHT_HAVE_PCI 1200b05da72SHans Ulli Kroll bool 1210b05da72SHans Ulli Kroll 12275e7153aSRalf Baechleconfig SYS_SUPPORTS_APM_EMULATION 12375e7153aSRalf Baechle bool 12475e7153aSRalf Baechle 125bc581770SLinus Walleijconfig HAVE_TCM 126bc581770SLinus Walleij bool 127bc581770SLinus Walleij select GENERIC_ALLOCATOR 128bc581770SLinus Walleij 129e119bfffSRussell Kingconfig HAVE_PROC_CPU 130e119bfffSRussell King bool 131e119bfffSRussell King 132ce816fa8SUwe Kleine-Königconfig NO_IOPORT_MAP 1335ea81769SAl Viro bool 1345ea81769SAl Viro 1351da177e4SLinus Torvaldsconfig EISA 1361da177e4SLinus Torvalds bool 1371da177e4SLinus Torvalds ---help--- 1381da177e4SLinus Torvalds The Extended Industry Standard Architecture (EISA) bus was 1391da177e4SLinus Torvalds developed as an open alternative to the IBM MicroChannel bus. 1401da177e4SLinus Torvalds 1411da177e4SLinus Torvalds The EISA bus provided some of the features of the IBM MicroChannel 1421da177e4SLinus Torvalds bus while maintaining backward compatibility with cards made for 1431da177e4SLinus Torvalds the older ISA bus. The EISA bus saw limited use between 1988 and 1441da177e4SLinus Torvalds 1995 when it was made obsolete by the PCI bus. 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds Say Y here if you are building a kernel for an EISA-based machine. 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds Otherwise, say N. 1491da177e4SLinus Torvalds 1501da177e4SLinus Torvaldsconfig SBUS 1511da177e4SLinus Torvalds bool 1521da177e4SLinus Torvalds 153f16fb1ecSRussell Kingconfig STACKTRACE_SUPPORT 154f16fb1ecSRussell King bool 155f16fb1ecSRussell King default y 156f16fb1ecSRussell King 157f76e9154SNicolas Pitreconfig HAVE_LATENCYTOP_SUPPORT 158f76e9154SNicolas Pitre bool 159f76e9154SNicolas Pitre depends on !SMP 160f76e9154SNicolas Pitre default y 161f76e9154SNicolas Pitre 162f16fb1ecSRussell Kingconfig LOCKDEP_SUPPORT 163f16fb1ecSRussell King bool 164f16fb1ecSRussell King default y 165f16fb1ecSRussell King 1667ad1bcb2SRussell Kingconfig TRACE_IRQFLAGS_SUPPORT 1677ad1bcb2SRussell King bool 1687ad1bcb2SRussell King default y 1697ad1bcb2SRussell King 1701da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM 1711da177e4SLinus Torvalds bool 1728a87411bSWill Deacon default y 1731da177e4SLinus Torvalds 174f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U32 175f0d1b0b3SDavid Howells bool 176f0d1b0b3SDavid Howells 177f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U64 178f0d1b0b3SDavid Howells bool 179f0d1b0b3SDavid Howells 1804a1b5733SEduardo Valentinconfig ARCH_HAS_BANDGAP 1814a1b5733SEduardo Valentin bool 1824a1b5733SEduardo Valentin 183b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT 184b89c3b16SAkinobu Mita bool 185b89c3b16SAkinobu Mita default y 186b89c3b16SAkinobu Mita 1871da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY 1881da177e4SLinus Torvalds bool 1891da177e4SLinus Torvalds default y 1901da177e4SLinus Torvalds 191a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC 192a08b6b79Sviro@ZenIV.linux.org.uk bool 193a08b6b79Sviro@ZenIV.linux.org.uk 1945ac6da66SChristoph Lameterconfig ZONE_DMA 1955ac6da66SChristoph Lameter bool 1965ac6da66SChristoph Lameter 197ccd7ab7fSFUJITA Tomonoriconfig NEED_DMA_MAP_STATE 198ccd7ab7fSFUJITA Tomonori def_bool y 199ccd7ab7fSFUJITA Tomonori 200c7edc9e3SDavid A. Longconfig ARCH_SUPPORTS_UPROBES 201c7edc9e3SDavid A. Long def_bool y 202c7edc9e3SDavid A. Long 20358af4a24SRob Herringconfig ARCH_HAS_DMA_SET_COHERENT_MASK 20458af4a24SRob Herring bool 20558af4a24SRob Herring 2061da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA 2071da177e4SLinus Torvalds bool 2081da177e4SLinus Torvalds 2091da177e4SLinus Torvaldsconfig FIQ 2101da177e4SLinus Torvalds bool 2111da177e4SLinus Torvalds 21213a5045dSRob Herringconfig NEED_RET_TO_USER 21313a5045dSRob Herring bool 21413a5045dSRob Herring 215034d2f5aSAl Viroconfig ARCH_MTD_XIP 216034d2f5aSAl Viro bool 217034d2f5aSAl Viro 218c760fc19SHyok S. Choiconfig VECTORS_BASE 219c760fc19SHyok S. Choi hex 2206afd6faeSHyok S. Choi default 0xffff0000 if MMU || CPU_HIGH_VECTOR 221c760fc19SHyok S. Choi default DRAM_BASE if REMAP_VECTORS_TO_RAM 222c760fc19SHyok S. Choi default 0x00000000 223c760fc19SHyok S. Choi help 22419accfd3SRussell King The base address of exception vectors. This must be two pages 22519accfd3SRussell King in size. 226c760fc19SHyok S. Choi 227dc21af99SRussell Kingconfig ARM_PATCH_PHYS_VIRT 228c1becedcSRussell King bool "Patch physical to virtual translations at runtime" if EMBEDDED 229c1becedcSRussell King default y 230b511d75dSNicolas Pitre depends on !XIP_KERNEL && MMU 231dc21af99SRussell King depends on !ARCH_REALVIEW || !SPARSEMEM 232dc21af99SRussell King help 233111e9a5cSRussell King Patch phys-to-virt and virt-to-phys translation functions at 234111e9a5cSRussell King boot and module load time according to the position of the 235111e9a5cSRussell King kernel in system memory. 236dc21af99SRussell King 237111e9a5cSRussell King This can only be used with non-XIP MMU kernels where the base 238daece596SNicolas Pitre of physical memory is at a 16MB boundary. 239dc21af99SRussell King 240c1becedcSRussell King Only disable this option if you know that you do not require 241c1becedcSRussell King this feature (eg, building a kernel for a single machine) and 242c1becedcSRussell King you need to shrink the kernel to the minimal size. 243c1becedcSRussell King 244c334bc15SRob Herringconfig NEED_MACH_IO_H 245c334bc15SRob Herring bool 246c334bc15SRob Herring help 247c334bc15SRob Herring Select this when mach/io.h is required to provide special 248c334bc15SRob Herring definitions for this platform. The need for mach/io.h should 249c334bc15SRob Herring be avoided when possible. 250c334bc15SRob Herring 2510cdc8b92SNicolas Pitreconfig NEED_MACH_MEMORY_H 2521b9f95f8SNicolas Pitre bool 253111e9a5cSRussell King help 2540cdc8b92SNicolas Pitre Select this when mach/memory.h is required to provide special 2550cdc8b92SNicolas Pitre definitions for this platform. The need for mach/memory.h should 2560cdc8b92SNicolas Pitre be avoided when possible. 2571b9f95f8SNicolas Pitre 2581b9f95f8SNicolas Pitreconfig PHYS_OFFSET 259974c0724SNicolas Pitre hex "Physical address of main memory" if MMU 260c6f54a9bSUwe Kleine-König depends on !ARM_PATCH_PHYS_VIRT 261974c0724SNicolas Pitre default DRAM_BASE if !MMU 262c6f54a9bSUwe Kleine-König default 0x00000000 if ARCH_EBSA110 || \ 263c6f54a9bSUwe Kleine-König EP93XX_SDCE3_SYNC_PHYS_OFFSET || \ 264c6f54a9bSUwe Kleine-König ARCH_FOOTBRIDGE || \ 265c6f54a9bSUwe Kleine-König ARCH_INTEGRATOR || \ 266c6f54a9bSUwe Kleine-König ARCH_IOP13XX || \ 267c6f54a9bSUwe Kleine-König ARCH_KS8695 || \ 268c6f54a9bSUwe Kleine-König (ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET) 269c6f54a9bSUwe Kleine-König default 0x10000000 if ARCH_OMAP1 || ARCH_RPC 270c6f54a9bSUwe Kleine-König default 0x20000000 if ARCH_S5PV210 271c6f54a9bSUwe Kleine-König default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET 272c6f54a9bSUwe Kleine-König default 0xc0000000 if EP93XX_SDCE0_PHYS_OFFSET || ARCH_SA1100 273c6f54a9bSUwe Kleine-König default 0xd0000000 if EP93XX_SDCE1_PHYS_OFFSET 274c6f54a9bSUwe Kleine-König default 0xe0000000 if EP93XX_SDCE2_PHYS_OFFSET 275c6f54a9bSUwe Kleine-König default 0xf0000000 if EP93XX_SDCE3_ASYNC_PHYS_OFFSET 2761b9f95f8SNicolas Pitre help 2771b9f95f8SNicolas Pitre Please provide the physical address corresponding to the 2781b9f95f8SNicolas Pitre location of main memory in your system. 279cada3c08SRussell King 28087e040b6SSimon Glassconfig GENERIC_BUG 28187e040b6SSimon Glass def_bool y 28287e040b6SSimon Glass depends on BUG 28387e040b6SSimon Glass 2841da177e4SLinus Torvaldssource "init/Kconfig" 2851da177e4SLinus Torvalds 286dc52ddc0SMatt Helsleysource "kernel/Kconfig.freezer" 287dc52ddc0SMatt Helsley 2881da177e4SLinus Torvaldsmenu "System Type" 2891da177e4SLinus Torvalds 2903c427975SHyok S. Choiconfig MMU 2913c427975SHyok S. Choi bool "MMU-based Paged Memory Management Support" 2923c427975SHyok S. Choi default y 2933c427975SHyok S. Choi help 2943c427975SHyok S. Choi Select if you want MMU-based virtualised addressing space 2953c427975SHyok S. Choi support by paged memory management. If unsure, say 'Y'. 2963c427975SHyok S. Choi 297ccf50e23SRussell King# 298ccf50e23SRussell King# The "ARM system type" choice list is ordered alphabetically by option 299ccf50e23SRussell King# text. Please add new entries in the option alphabetic order. 300ccf50e23SRussell King# 3011da177e4SLinus Torvaldschoice 3021da177e4SLinus Torvalds prompt "ARM system type" 3031420b22bSArnd Bergmann default ARCH_VERSATILE if !MMU 3041420b22bSArnd Bergmann default ARCH_MULTIPLATFORM if MMU 3051da177e4SLinus Torvalds 306387798b3SRob Herringconfig ARCH_MULTIPLATFORM 307387798b3SRob Herring bool "Allow multiple platforms to be selected" 308b1b3f49cSRussell King depends on MMU 309ddb902ccSRob Herring select ARCH_WANT_OPTIONAL_GPIOLIB 31042dc836dSOlof Johansson select ARM_HAS_SG_CHAIN 311387798b3SRob Herring select ARM_PATCH_PHYS_VIRT 312387798b3SRob Herring select AUTO_ZRELADDR 3136d0add40SRob Herring select CLKSRC_OF 31466314223SDinh Nguyen select COMMON_CLK 315ddb902ccSRob Herring select GENERIC_CLOCKEVENTS 31608d38bebSWill Deacon select MIGHT_HAVE_PCI 317387798b3SRob Herring select MULTI_IRQ_HANDLER 31866314223SDinh Nguyen select SPARSE_IRQ 31966314223SDinh Nguyen select USE_OF 32066314223SDinh Nguyen 3214af6fee1SDeepak Saxenaconfig ARCH_INTEGRATOR 3224af6fee1SDeepak Saxena bool "ARM Ltd. Integrator family" 323b1b3f49cSRussell King select ARM_AMBA 32491942d17SUwe Kleine-König select ARM_PATCH_PHYS_VIRT if MMU 325fe989145Spanchaxari select AUTO_ZRELADDR 326a613163dSLinus Walleij select COMMON_CLK 327f9a6aa43SLinus Walleij select COMMON_CLK_VERSATILE 328b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 3299904f793SLinus Walleij select HAVE_TCM 330c5a0adb5SRussell King select ICST 331b1b3f49cSRussell King select MULTI_IRQ_HANDLER 332f4b8b319SRussell King select PLAT_VERSATILE 333695436e3SLinus Walleij select SPARSE_IRQ 334d7057e1dSLinus Walleij select USE_OF 3352389d501SLinus Walleij select VERSATILE_FPGA_IRQ 3364af6fee1SDeepak Saxena help 3374af6fee1SDeepak Saxena Support for ARM's Integrator platform. 3384af6fee1SDeepak Saxena 3394af6fee1SDeepak Saxenaconfig ARCH_REALVIEW 3404af6fee1SDeepak Saxena bool "ARM Ltd. RealView family" 341b1b3f49cSRussell King select ARCH_WANT_OPTIONAL_GPIOLIB 3424af6fee1SDeepak Saxena select ARM_AMBA 343b1b3f49cSRussell King select ARM_TIMER_SP804 344f9a6aa43SLinus Walleij select COMMON_CLK 345f9a6aa43SLinus Walleij select COMMON_CLK_VERSATILE 346ae30ceacSCatalin Marinas select GENERIC_CLOCKEVENTS 347b1b3f49cSRussell King select GPIO_PL061 if GPIOLIB 348b1b3f49cSRussell King select ICST 349b1b3f49cSRussell King select NEED_MACH_MEMORY_H 350f4b8b319SRussell King select PLAT_VERSATILE 3514af6fee1SDeepak Saxena help 3524af6fee1SDeepak Saxena This enables support for ARM Ltd RealView boards. 3534af6fee1SDeepak Saxena 3544af6fee1SDeepak Saxenaconfig ARCH_VERSATILE 3554af6fee1SDeepak Saxena bool "ARM Ltd. Versatile family" 356b1b3f49cSRussell King select ARCH_WANT_OPTIONAL_GPIOLIB 3574af6fee1SDeepak Saxena select ARM_AMBA 358b1b3f49cSRussell King select ARM_TIMER_SP804 3594af6fee1SDeepak Saxena select ARM_VIC 3606d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 361b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 362aa3831cfSKyungmin Park select HAVE_MACH_CLKDEV 363c5a0adb5SRussell King select ICST 364f4b8b319SRussell King select PLAT_VERSATILE 365b1b3f49cSRussell King select PLAT_VERSATILE_CLOCK 3662389d501SLinus Walleij select VERSATILE_FPGA_IRQ 3674af6fee1SDeepak Saxena help 3684af6fee1SDeepak Saxena This enables support for ARM Ltd Versatile board. 3694af6fee1SDeepak Saxena 3708fc5ffa0SAndrew Victorconfig ARCH_AT91 3718fc5ffa0SAndrew Victor bool "Atmel AT91" 372f373e8c0SRyan Mallon select ARCH_REQUIRE_GPIOLIB 373bd602995SJean-Christophe PLAGNIOL-VILLARD select CLKDEV_LOOKUP 374e261501dSNicolas Ferre select IRQ_DOMAIN 3751ac02d79SRob Herring select NEED_MACH_IO_H if PCCARD 3766732ae5cSJean-Christophe PLAGNIOL-VILLARD select PINCTRL 3776732ae5cSJean-Christophe PLAGNIOL-VILLARD select PINCTRL_AT91 if USE_OF 3784af6fee1SDeepak Saxena help 379929e994fSNicolas Ferre This enables support for systems based on Atmel 380929e994fSNicolas Ferre AT91RM9200 and AT91SAM9* processors. 3814af6fee1SDeepak Saxena 38293e22567SRussell Kingconfig ARCH_CLPS711X 38393e22567SRussell King bool "Cirrus Logic CLPS711x/EP721x/EP731x-based" 384a3b8d4a5SAlexander Shiyan select ARCH_REQUIRE_GPIOLIB 385ea7d1bc9SAlexander Shiyan select AUTO_ZRELADDR 386c99f72adSAlexander Shiyan select CLKSRC_MMIO 38793e22567SRussell King select COMMON_CLK 38893e22567SRussell King select CPU_ARM720T 3894a8355c4SAlexander Shiyan select GENERIC_CLOCKEVENTS 3906597619fSAlexander Shiyan select MFD_SYSCON 39193e22567SRussell King help 39293e22567SRussell King Support for Cirrus Logic 711x/721x/731x based boards. 39393e22567SRussell King 394788c9700SRussell Kingconfig ARCH_GEMINI 395788c9700SRussell King bool "Cortina Systems Gemini" 396788c9700SRussell King select ARCH_REQUIRE_GPIOLIB 397f3372c01SLinus Walleij select CLKSRC_MMIO 398b1b3f49cSRussell King select CPU_FA526 399f3372c01SLinus Walleij select GENERIC_CLOCKEVENTS 400788c9700SRussell King help 401788c9700SRussell King Support for the Cortina Systems Gemini family SoCs 402788c9700SRussell King 4031da177e4SLinus Torvaldsconfig ARCH_EBSA110 4041da177e4SLinus Torvalds bool "EBSA-110" 405b1b3f49cSRussell King select ARCH_USES_GETTIMEOFFSET 406c750815eSRussell King select CPU_SA110 407f7e68bbfSRussell King select ISA 408c334bc15SRob Herring select NEED_MACH_IO_H 4090cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 410ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 4111da177e4SLinus Torvalds help 4121da177e4SLinus Torvalds This is an evaluation board for the StrongARM processor available 413f6c8965aSMartin Michlmayr from Digital. It has limited hardware on-board, including an 4141da177e4SLinus Torvalds Ethernet interface, two PCMCIA sockets, two serial ports and a 4151da177e4SLinus Torvalds parallel port. 4161da177e4SLinus Torvalds 4176d85e2b0SUwe Kleine-Königconfig ARCH_EFM32 4186d85e2b0SUwe Kleine-König bool "Energy Micro efm32" 4196d85e2b0SUwe Kleine-König depends on !MMU 4206d85e2b0SUwe Kleine-König select ARCH_REQUIRE_GPIOLIB 4216d85e2b0SUwe Kleine-König select ARM_NVIC 42251aaf81fSRussell King select AUTO_ZRELADDR 4236d85e2b0SUwe Kleine-König select CLKSRC_OF 4246d85e2b0SUwe Kleine-König select COMMON_CLK 4256d85e2b0SUwe Kleine-König select CPU_V7M 4266d85e2b0SUwe Kleine-König select GENERIC_CLOCKEVENTS 4276d85e2b0SUwe Kleine-König select NO_DMA 428ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 4296d85e2b0SUwe Kleine-König select SPARSE_IRQ 4306d85e2b0SUwe Kleine-König select USE_OF 4316d85e2b0SUwe Kleine-König help 4326d85e2b0SUwe Kleine-König Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko 4336d85e2b0SUwe Kleine-König processors. 4346d85e2b0SUwe Kleine-König 435e7736d47SLennert Buytenhekconfig ARCH_EP93XX 436e7736d47SLennert Buytenhek bool "EP93xx-based" 437b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 438b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 439b1b3f49cSRussell King select ARCH_USES_GETTIMEOFFSET 440e7736d47SLennert Buytenhek select ARM_AMBA 441e7736d47SLennert Buytenhek select ARM_VIC 4426d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 443b1b3f49cSRussell King select CPU_ARM920T 444e7736d47SLennert Buytenhek help 445e7736d47SLennert Buytenhek This enables support for the Cirrus EP93xx series of CPUs. 446e7736d47SLennert Buytenhek 4471da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE 4481da177e4SLinus Torvalds bool "FootBridge" 449c750815eSRussell King select CPU_SA110 4501da177e4SLinus Torvalds select FOOTBRIDGE 4514e8d7637SRussell King select GENERIC_CLOCKEVENTS 452d0ee9f40SArnd Bergmann select HAVE_IDE 4538ef6e620SRob Herring select NEED_MACH_IO_H if !MMU 4540cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 455f999b8bdSMartin Michlmayr help 456f999b8bdSMartin Michlmayr Support for systems based on the DC21285 companion chip 457f999b8bdSMartin Michlmayr ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder. 4581da177e4SLinus Torvalds 4594af6fee1SDeepak Saxenaconfig ARCH_NETX 4604af6fee1SDeepak Saxena bool "Hilscher NetX based" 461b1b3f49cSRussell King select ARM_VIC 462234b6cedSRussell King select CLKSRC_MMIO 463c750815eSRussell King select CPU_ARM926T 4642fcfe6b8SUwe Kleine-König select GENERIC_CLOCKEVENTS 465f999b8bdSMartin Michlmayr help 4664af6fee1SDeepak Saxena This enables support for systems based on the Hilscher NetX Soc 4674af6fee1SDeepak Saxena 4683b938be6SRussell Kingconfig ARCH_IOP13XX 4693b938be6SRussell King bool "IOP13xx-based" 4703b938be6SRussell King depends on MMU 471b1b3f49cSRussell King select CPU_XSC3 4720cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 47313a5045dSRob Herring select NEED_RET_TO_USER 474b1b3f49cSRussell King select PCI 475b1b3f49cSRussell King select PLAT_IOP 476b1b3f49cSRussell King select VMSPLIT_1G 47737ebbcffSThomas Gleixner select SPARSE_IRQ 4783b938be6SRussell King help 4793b938be6SRussell King Support for Intel's IOP13XX (XScale) family of processors. 4803b938be6SRussell King 4813f7e5815SLennert Buytenhekconfig ARCH_IOP32X 4823f7e5815SLennert Buytenhek bool "IOP32x-based" 483a4f7e763SRussell King depends on MMU 484b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 485c750815eSRussell King select CPU_XSCALE 486e9004f50SLinus Walleij select GPIO_IOP 48713a5045dSRob Herring select NEED_RET_TO_USER 488f7e68bbfSRussell King select PCI 489b1b3f49cSRussell King select PLAT_IOP 490f999b8bdSMartin Michlmayr help 4913f7e5815SLennert Buytenhek Support for Intel's 80219 and IOP32X (XScale) family of 4923f7e5815SLennert Buytenhek processors. 4933f7e5815SLennert Buytenhek 4943f7e5815SLennert Buytenhekconfig ARCH_IOP33X 4953f7e5815SLennert Buytenhek bool "IOP33x-based" 4963f7e5815SLennert Buytenhek depends on MMU 497b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 498c750815eSRussell King select CPU_XSCALE 499e9004f50SLinus Walleij select GPIO_IOP 50013a5045dSRob Herring select NEED_RET_TO_USER 5013f7e5815SLennert Buytenhek select PCI 502b1b3f49cSRussell King select PLAT_IOP 5033f7e5815SLennert Buytenhek help 5043f7e5815SLennert Buytenhek Support for Intel's IOP33X (XScale) family of processors. 5051da177e4SLinus Torvalds 5063b938be6SRussell Kingconfig ARCH_IXP4XX 5073b938be6SRussell King bool "IXP4xx-based" 508a4f7e763SRussell King depends on MMU 50958af4a24SRob Herring select ARCH_HAS_DMA_SET_COHERENT_MASK 510b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 51151aaf81fSRussell King select ARCH_SUPPORTS_BIG_ENDIAN 512234b6cedSRussell King select CLKSRC_MMIO 513c750815eSRussell King select CPU_XSCALE 514b1b3f49cSRussell King select DMABOUNCE if PCI 5153b938be6SRussell King select GENERIC_CLOCKEVENTS 5160b05da72SHans Ulli Kroll select MIGHT_HAVE_PCI 517c334bc15SRob Herring select NEED_MACH_IO_H 5189296d94dSFlorian Fainelli select USB_EHCI_BIG_ENDIAN_DESC 519171b3f0dSRussell King select USB_EHCI_BIG_ENDIAN_MMIO 520c4713074SLennert Buytenhek help 5213b938be6SRussell King Support for Intel's IXP4XX (XScale) family of processors. 522c4713074SLennert Buytenhek 523edabd38eSSaeed Bisharaconfig ARCH_DOVE 524edabd38eSSaeed Bishara bool "Marvell Dove" 525edabd38eSSaeed Bishara select ARCH_REQUIRE_GPIOLIB 526756b2531SSebastian Hesselbarth select CPU_PJ4 527edabd38eSSaeed Bishara select GENERIC_CLOCKEVENTS 5280f81bd43SRussell King select MIGHT_HAVE_PCI 529171b3f0dSRussell King select MVEBU_MBUS 5309139acd1SSebastian Hesselbarth select PINCTRL 5319139acd1SSebastian Hesselbarth select PINCTRL_DOVE 532abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 533edabd38eSSaeed Bishara help 534edabd38eSSaeed Bishara Support for the Marvell Dove SoC 88AP510 535edabd38eSSaeed Bishara 536788c9700SRussell Kingconfig ARCH_MV78XX0 537788c9700SRussell King bool "Marvell MV78xx0" 538a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 539b1b3f49cSRussell King select CPU_FEROCEON 540788c9700SRussell King select GENERIC_CLOCKEVENTS 541171b3f0dSRussell King select MVEBU_MBUS 542b1b3f49cSRussell King select PCI 543abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 544788c9700SRussell King help 545788c9700SRussell King Support for the following Marvell MV78xx0 series SoCs: 546788c9700SRussell King MV781x0, MV782x0. 547788c9700SRussell King 548788c9700SRussell Kingconfig ARCH_ORION5X 549788c9700SRussell King bool "Marvell Orion" 550788c9700SRussell King depends on MMU 551a8865655SErik Benada select ARCH_REQUIRE_GPIOLIB 552b1b3f49cSRussell King select CPU_FEROCEON 553788c9700SRussell King select GENERIC_CLOCKEVENTS 554171b3f0dSRussell King select MVEBU_MBUS 555b1b3f49cSRussell King select PCI 556abcda1dcSThomas Petazzoni select PLAT_ORION_LEGACY 557788c9700SRussell King help 558788c9700SRussell King Support for the following Marvell Orion 5x series SoCs: 559788c9700SRussell King Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182), 560788c9700SRussell King Orion-2 (5281), Orion-1-90 (6183). 561788c9700SRussell King 562788c9700SRussell Kingconfig ARCH_MMP 5632f7e8faeSHaojian Zhuang bool "Marvell PXA168/910/MMP2" 564788c9700SRussell King depends on MMU 565788c9700SRussell King select ARCH_REQUIRE_GPIOLIB 5666d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 567b1b3f49cSRussell King select GENERIC_ALLOCATOR 568788c9700SRussell King select GENERIC_CLOCKEVENTS 569157d2644SHaojian Zhuang select GPIO_PXA 570c24b3114SHaojian Zhuang select IRQ_DOMAIN 5710f374561SHaojian Zhuang select MULTI_IRQ_HANDLER 5727c8f86a4SAxel Lin select PINCTRL 573788c9700SRussell King select PLAT_PXA 5740bd86961SHaojian Zhuang select SPARSE_IRQ 575788c9700SRussell King help 5762f7e8faeSHaojian Zhuang Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line. 577788c9700SRussell King 578c53c9cf6SAndrew Victorconfig ARCH_KS8695 579c53c9cf6SAndrew Victor bool "Micrel/Kendin KS8695" 58072880ad8SDaniel Silverstone select ARCH_REQUIRE_GPIOLIB 581c7e783d6SLinus Walleij select CLKSRC_MMIO 582b1b3f49cSRussell King select CPU_ARM922T 583c7e783d6SLinus Walleij select GENERIC_CLOCKEVENTS 584b1b3f49cSRussell King select NEED_MACH_MEMORY_H 585c53c9cf6SAndrew Victor help 586c53c9cf6SAndrew Victor Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based 587c53c9cf6SAndrew Victor System-on-Chip devices. 588c53c9cf6SAndrew Victor 589788c9700SRussell Kingconfig ARCH_W90X900 590788c9700SRussell King bool "Nuvoton W90X900 CPU" 591c52d3d68Swanzongshun select ARCH_REQUIRE_GPIOLIB 5926d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 5936fa5d5f7SRussell King select CLKSRC_MMIO 594b1b3f49cSRussell King select CPU_ARM926T 59558b5369eSwanzongshun select GENERIC_CLOCKEVENTS 596777f9bebSLennert Buytenhek help 597a8bc4eadSwanzongshun Support for Nuvoton (Winbond logic dept.) ARM9 processor, 598a8bc4eadSwanzongshun At present, the w90x900 has been renamed nuc900, regarding 599a8bc4eadSwanzongshun the ARM series product line, you can login the following 600a8bc4eadSwanzongshun link address to know more. 601a8bc4eadSwanzongshun 602a8bc4eadSwanzongshun <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/ 603a8bc4eadSwanzongshun ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller> 604585cf175STzachi Perelstein 60593e22567SRussell Kingconfig ARCH_LPC32XX 60693e22567SRussell King bool "NXP LPC32XX" 60793e22567SRussell King select ARCH_REQUIRE_GPIOLIB 60893e22567SRussell King select ARM_AMBA 6094073723aSRussell King select CLKDEV_LOOKUP 610234b6cedSRussell King select CLKSRC_MMIO 61193e22567SRussell King select CPU_ARM926T 61293e22567SRussell King select GENERIC_CLOCKEVENTS 61393e22567SRussell King select HAVE_IDE 61493e22567SRussell King select USE_OF 61593e22567SRussell King help 61693e22567SRussell King Support for the NXP LPC32XX family of processors 61793e22567SRussell King 6181da177e4SLinus Torvaldsconfig ARCH_PXA 6192c8086a5Seric miao bool "PXA2xx/PXA3xx-based" 620a4f7e763SRussell King depends on MMU 621b1b3f49cSRussell King select ARCH_MTD_XIP 622b1b3f49cSRussell King select ARCH_REQUIRE_GPIOLIB 623b1b3f49cSRussell King select ARM_CPU_SUSPEND if PM 624b1b3f49cSRussell King select AUTO_ZRELADDR 6256d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 626234b6cedSRussell King select CLKSRC_MMIO 6276f6caeaaSRobert Jarzmik select CLKSRC_OF 628981d0f39SEric Miao select GENERIC_CLOCKEVENTS 629157d2644SHaojian Zhuang select GPIO_PXA 630b1b3f49cSRussell King select HAVE_IDE 631b1b3f49cSRussell King select MULTI_IRQ_HANDLER 632bd5ce433SEric Miao select PLAT_PXA 6336ac6b817SHaojian Zhuang select SPARSE_IRQ 634f999b8bdSMartin Michlmayr help 6352c8086a5Seric miao Support for Intel/Marvell's PXA2xx/PXA3xx processor line. 6361da177e4SLinus Torvalds 6378fc1b0f8SKumar Galaconfig ARCH_MSM 6388fc1b0f8SKumar Gala bool "Qualcomm MSM (non-multiplatform)" 639923a081cSPavel Machek select ARCH_REQUIRE_GPIOLIB 6408cc7f533SStephen Boyd select COMMON_CLK 641b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 64249cbe786SEric Miao help 6434b53eb4fSDaniel Walker Support for Qualcomm MSM/QSD based systems. This runs on the 6444b53eb4fSDaniel Walker apps processor of the MSM/QSD and depends on a shared memory 6454b53eb4fSDaniel Walker interface to the modem processor which runs the baseband 6464b53eb4fSDaniel Walker stack and controls some vital subsystems 6474b53eb4fSDaniel Walker (clock and power control, etc). 64849cbe786SEric Miao 649bf98c1eaSLaurent Pinchartconfig ARCH_SHMOBILE_LEGACY 6500d9fd616SLaurent Pinchart bool "Renesas ARM SoCs (non-multiplatform)" 651bf98c1eaSLaurent Pinchart select ARCH_SHMOBILE 65291942d17SUwe Kleine-König select ARM_PATCH_PHYS_VIRT if MMU 6535e93c6b4SPaul Mundt select CLKDEV_LOOKUP 654b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 6554c3ffffdSStephen Boyd select HAVE_ARM_SCU if SMP 656a894fcc2SStephen Boyd select HAVE_ARM_TWD if SMP 657aa3831cfSKyungmin Park select HAVE_MACH_CLKDEV 6583b55658aSDave Martin select HAVE_SMP 659ce5ea9f3SDave Martin select MIGHT_HAVE_CACHE_L2X0 66060f1435cSMagnus Damm select MULTI_IRQ_HANDLER 661ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 6622cd3c927SLaurent Pinchart select PINCTRL 663b1b3f49cSRussell King select PM_GENERIC_DOMAINS if PM 664b1b3f49cSRussell King select SPARSE_IRQ 665c793c1b0SMagnus Damm help 6660d9fd616SLaurent Pinchart Support for Renesas ARM SoC platforms using a non-multiplatform 6670d9fd616SLaurent Pinchart kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car 6680d9fd616SLaurent Pinchart and RZ families. 669c793c1b0SMagnus Damm 6701da177e4SLinus Torvaldsconfig ARCH_RPC 6711da177e4SLinus Torvalds bool "RiscPC" 6721da177e4SLinus Torvalds select ARCH_ACORN 673a08b6b79Sviro@ZenIV.linux.org.uk select ARCH_MAY_HAVE_PC_FDC 67407f841b7SRussell King select ARCH_SPARSEMEM_ENABLE 6755cfc8ee0SJohn Stultz select ARCH_USES_GETTIMEOFFSET 676fa04e209SArnd Bergmann select CPU_SA110 677b1b3f49cSRussell King select FIQ 678d0ee9f40SArnd Bergmann select HAVE_IDE 679b1b3f49cSRussell King select HAVE_PATA_PLATFORM 680b1b3f49cSRussell King select ISA_DMA_API 681c334bc15SRob Herring select NEED_MACH_IO_H 6820cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 683ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 684b4811bacSArnd Bergmann select VIRT_TO_BUS 6851da177e4SLinus Torvalds help 6861da177e4SLinus Torvalds On the Acorn Risc-PC, Linux can support the internal IDE disk and 6871da177e4SLinus Torvalds CD-ROM interface, serial and parallel port, and the floppy drive. 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvaldsconfig ARCH_SA1100 6901da177e4SLinus Torvalds bool "SA1100-based" 691b1b3f49cSRussell King select ARCH_MTD_XIP 6927444a72eSMichael Buesch select ARCH_REQUIRE_GPIOLIB 693b1b3f49cSRussell King select ARCH_SPARSEMEM_ENABLE 694b1b3f49cSRussell King select CLKDEV_LOOKUP 695b1b3f49cSRussell King select CLKSRC_MMIO 696b1b3f49cSRussell King select CPU_FREQ 697b1b3f49cSRussell King select CPU_SA1100 698b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 699d0ee9f40SArnd Bergmann select HAVE_IDE 700b1b3f49cSRussell King select ISA 7010cdc8b92SNicolas Pitre select NEED_MACH_MEMORY_H 702375dec92SRussell King select SPARSE_IRQ 703f999b8bdSMartin Michlmayr help 704f999b8bdSMartin Michlmayr Support for StrongARM 11x0 based boards. 7051da177e4SLinus Torvalds 706b130d5c2SKukjin Kimconfig ARCH_S3C24XX 707b130d5c2SKukjin Kim bool "Samsung S3C24XX SoCs" 70853650430SKukjin Kim select ARCH_REQUIRE_GPIOLIB 709335cce74SArnd Bergmann select ATAGS 710b1b3f49cSRussell King select CLKDEV_LOOKUP 7114280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 7127f78b6ebSRomain Naour select GENERIC_CLOCKEVENTS 713880cf071STomasz Figa select GPIO_SAMSUNG 71420676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 715b130d5c2SKukjin Kim select HAVE_S3C2410_WATCHDOG if WATCHDOG 716b1b3f49cSRussell King select HAVE_S3C_RTC if RTC_CLASS 71717453dd2SHeiko Stuebner select MULTI_IRQ_HANDLER 718c334bc15SRob Herring select NEED_MACH_IO_H 719cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 7201da177e4SLinus Torvalds help 721b130d5c2SKukjin Kim Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443 722b130d5c2SKukjin Kim and S3C2450 SoCs based systems, such as the Simtec Electronics BAST 723b130d5c2SKukjin Kim (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the 724b130d5c2SKukjin Kim Samsung SMDK2410 development board (and derivatives). 72563b1f51bSBen Dooks 726a08ab637SBen Dooksconfig ARCH_S3C64XX 727a08ab637SBen Dooks bool "Samsung S3C64XX" 72889f0ce72SBen Dooks select ARCH_REQUIRE_GPIOLIB 7291db0287aSTomasz Figa select ARM_AMBA 730b1b3f49cSRussell King select ARM_VIC 731335cce74SArnd Bergmann select ATAGS 732b1b3f49cSRussell King select CLKDEV_LOOKUP 7334280506aSTomasz Figa select CLKSRC_SAMSUNG_PWM 734ccecba3cSPankaj Dubey select COMMON_CLK_SAMSUNG 73570bacadbSTomasz Figa select CPU_V6K 73604a49b71SRomain Naour select GENERIC_CLOCKEVENTS 737880cf071STomasz Figa select GPIO_SAMSUNG 73820676c15SKukjin Kim select HAVE_S3C2410_I2C if I2C 739c39d8d55SKyungmin Park select HAVE_S3C2410_WATCHDOG if WATCHDOG 740b1b3f49cSRussell King select HAVE_TCM 741ce816fa8SUwe Kleine-König select NO_IOPORT_MAP 742b1b3f49cSRussell King select PLAT_SAMSUNG 7434ab75a3fSArnd Bergmann select PM_GENERIC_DOMAINS if PM 744b1b3f49cSRussell King select S3C_DEV_NAND 745b1b3f49cSRussell King select S3C_GPIO_TRACK 746cd8dc7aeSTomasz Figa select SAMSUNG_ATAGS 7476e2d9e93STomasz Figa select SAMSUNG_WAKEMASK 74888f59738STomasz Figa select SAMSUNG_WDT_RESET 749a08ab637SBen Dooks help 750a08ab637SBen Dooks Samsung S3C64XX series based systems 751a08ab637SBen Dooks 7527c6337e2SKevin Hilmanconfig ARCH_DAVINCI 7537c6337e2SKevin Hilman bool "TI DaVinci" 754b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 755dce1115bSDavid Brownell select ARCH_REQUIRE_GPIOLIB 7566d803ba7SJean-Christop PLAGNIOL-VILLARD select CLKDEV_LOOKUP 75720e9969bSDavid Brownell select GENERIC_ALLOCATOR 758b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 759dc7ad3b3SRussell King select GENERIC_IRQ_CHIP 760b1b3f49cSRussell King select HAVE_IDE 7613ad7a42dSMatt Porter select TI_PRIV_EDMA 762689e331fSSekhar Nori select USE_OF 763b1b3f49cSRussell King select ZONE_DMA 7647c6337e2SKevin Hilman help 7657c6337e2SKevin Hilman Support for TI's DaVinci platform. 7667c6337e2SKevin Hilman 767a0694861STony Lindgrenconfig ARCH_OMAP1 768a0694861STony Lindgren bool "TI OMAP1" 76900a36698SArnd Bergmann depends on MMU 770b1b3f49cSRussell King select ARCH_HAS_HOLES_MEMORYMODEL 771a0694861STony Lindgren select ARCH_OMAP 77221f47fbcSAlexey Charkov select ARCH_REQUIRE_GPIOLIB 773e9a91de7STony Prisk select CLKDEV_LOOKUP 774cee37e50Sviresh kumar select CLKSRC_MMIO 775b1b3f49cSRussell King select GENERIC_CLOCKEVENTS 776a0694861STony Lindgren select GENERIC_IRQ_CHIP 777a0694861STony Lindgren select HAVE_IDE 778a0694861STony Lindgren select IRQ_DOMAIN 779a0694861STony Lindgren select NEED_MACH_IO_H if PCCARD 780a0694861STony Lindgren select NEED_MACH_MEMORY_H 78121f47fbcSAlexey Charkov help 782a0694861STony Lindgren Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx) 78302c981c0SBinghua Duan 7841da177e4SLinus Torvaldsendchoice 7851da177e4SLinus Torvalds 786387798b3SRob Herringmenu "Multiple platform selection" 787387798b3SRob Herring depends on ARCH_MULTIPLATFORM 788387798b3SRob Herring 789387798b3SRob Herringcomment "CPU Core family selection" 790387798b3SRob Herring 791f8afae40SArnd Bergmannconfig ARCH_MULTI_V4 792f8afae40SArnd Bergmann bool "ARMv4 based platforms (FA526)" 793f8afae40SArnd Bergmann depends on !ARCH_MULTI_V6_V7 794f8afae40SArnd Bergmann select ARCH_MULTI_V4_V5 795f8afae40SArnd Bergmann select CPU_FA526 796f8afae40SArnd Bergmann 797387798b3SRob Herringconfig ARCH_MULTI_V4T 798387798b3SRob Herring bool "ARMv4T based platforms (ARM720T, ARM920T, ...)" 799387798b3SRob Herring depends on !ARCH_MULTI_V6_V7 800b1b3f49cSRussell King select ARCH_MULTI_V4_V5 80124e860fbSArnd Bergmann select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \ 80224e860fbSArnd Bergmann CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \ 80324e860fbSArnd Bergmann CPU_ARM925T || CPU_ARM940T) 804387798b3SRob Herring 805387798b3SRob Herringconfig ARCH_MULTI_V5 806387798b3SRob Herring bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)" 807387798b3SRob Herring depends on !ARCH_MULTI_V6_V7 808b1b3f49cSRussell King select ARCH_MULTI_V4_V5 80912567bbdSAndrew Lunn select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \ 81024e860fbSArnd Bergmann CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \ 81124e860fbSArnd Bergmann CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON) 812387798b3SRob Herring 813387798b3SRob Herringconfig ARCH_MULTI_V4_V5 814387798b3SRob Herring bool 815387798b3SRob Herring 816387798b3SRob Herringconfig ARCH_MULTI_V6 8178dda05ccSStephen Boyd bool "ARMv6 based platforms (ARM11)" 818387798b3SRob Herring select ARCH_MULTI_V6_V7 81942f4754aSRob Herring select CPU_V6K 820387798b3SRob Herring 821387798b3SRob Herringconfig ARCH_MULTI_V7 8228dda05ccSStephen Boyd bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)" 823387798b3SRob Herring default y 824387798b3SRob Herring select ARCH_MULTI_V6_V7 825b1b3f49cSRussell King select CPU_V7 82690bc8ac7SRob Herring select HAVE_SMP 827387798b3SRob Herring 828387798b3SRob Herringconfig ARCH_MULTI_V6_V7 829387798b3SRob Herring bool 8309352b05bSRob Herring select MIGHT_HAVE_CACHE_L2X0 831387798b3SRob Herring 832387798b3SRob Herringconfig ARCH_MULTI_CPU_AUTO 833387798b3SRob Herring def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7) 834387798b3SRob Herring select ARCH_MULTI_V5 835387798b3SRob Herring 836387798b3SRob Herringendmenu 837387798b3SRob Herring 83805e2a3deSRob Herringconfig ARCH_VIRT 83905e2a3deSRob Herring bool "Dummy Virtual Machine" if ARCH_MULTI_V7 8404b8b5f25SRob Herring select ARM_AMBA 84105e2a3deSRob Herring select ARM_GIC 84205e2a3deSRob Herring select ARM_PSCI 8434b8b5f25SRob Herring select HAVE_ARM_ARCH_TIMER 84405e2a3deSRob Herring 845ccf50e23SRussell King# 846ccf50e23SRussell King# This is sorted alphabetically by mach-* pathname. However, plat-* 847ccf50e23SRussell King# Kconfigs may be included either alphabetically (according to the 848ccf50e23SRussell King# plat- suffix) or along side the corresponding mach-* source. 849ccf50e23SRussell King# 8503e93a22bSGregory CLEMENTsource "arch/arm/mach-mvebu/Kconfig" 8513e93a22bSGregory CLEMENT 85295b8f20fSRussell Kingsource "arch/arm/mach-at91/Kconfig" 85395b8f20fSRussell King 8541d22924eSAnders Bergsource "arch/arm/mach-axxia/Kconfig" 8551d22924eSAnders Berg 8568ac49e04SChristian Daudtsource "arch/arm/mach-bcm/Kconfig" 8578ac49e04SChristian Daudt 8581c37fa10SSebastian Hesselbarthsource "arch/arm/mach-berlin/Kconfig" 8591c37fa10SSebastian Hesselbarth 8601da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig" 8611da177e4SLinus Torvalds 862d94f944eSAnton Vorontsovsource "arch/arm/mach-cns3xxx/Kconfig" 863d94f944eSAnton Vorontsov 86495b8f20fSRussell Kingsource "arch/arm/mach-davinci/Kconfig" 86595b8f20fSRussell King 86695b8f20fSRussell Kingsource "arch/arm/mach-dove/Kconfig" 86795b8f20fSRussell King 868e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig" 869e7736d47SLennert Buytenhek 8701da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig" 8711da177e4SLinus Torvalds 87259d3a193SPaulius Zaleckassource "arch/arm/mach-gemini/Kconfig" 87359d3a193SPaulius Zaleckas 874387798b3SRob Herringsource "arch/arm/mach-highbank/Kconfig" 875387798b3SRob Herring 876389ee0c2SHaojian Zhuangsource "arch/arm/mach-hisi/Kconfig" 877389ee0c2SHaojian Zhuang 8781da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig" 8791da177e4SLinus Torvalds 8803f7e5815SLennert Buytenheksource "arch/arm/mach-iop32x/Kconfig" 8813f7e5815SLennert Buytenhek 8823f7e5815SLennert Buytenheksource "arch/arm/mach-iop33x/Kconfig" 8831da177e4SLinus Torvalds 884285f5fa7SDan Williamssource "arch/arm/mach-iop13xx/Kconfig" 885285f5fa7SDan Williams 8861da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig" 8871da177e4SLinus Torvalds 888828989adSSantosh Shilimkarsource "arch/arm/mach-keystone/Kconfig" 889828989adSSantosh Shilimkar 89095b8f20fSRussell Kingsource "arch/arm/mach-ks8695/Kconfig" 89195b8f20fSRussell King 89295b8f20fSRussell Kingsource "arch/arm/mach-msm/Kconfig" 89395b8f20fSRussell King 89417723fd3SJonas Jensensource "arch/arm/mach-moxart/Kconfig" 89517723fd3SJonas Jensen 896794d15b2SStanislav Samsonovsource "arch/arm/mach-mv78xx0/Kconfig" 897794d15b2SStanislav Samsonov 8983995eb82SShawn Guosource "arch/arm/mach-imx/Kconfig" 8991da177e4SLinus Torvalds 900f682a218SMatthias Bruggersource "arch/arm/mach-mediatek/Kconfig" 901f682a218SMatthias Brugger 9021d3f33d5SShawn Guosource "arch/arm/mach-mxs/Kconfig" 9031d3f33d5SShawn Guo 90495b8f20fSRussell Kingsource "arch/arm/mach-netx/Kconfig" 90549cbe786SEric Miao 90695b8f20fSRussell Kingsource "arch/arm/mach-nomadik/Kconfig" 90795b8f20fSRussell King 9089851ca57SDaniel Tangsource "arch/arm/mach-nspire/Kconfig" 9099851ca57SDaniel Tang 910d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig" 911d48af15eSTony Lindgren 912d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig" 9131da177e4SLinus Torvalds 9141dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig" 9151dbae815STony Lindgren 9169dd0b194SLennert Buytenheksource "arch/arm/mach-orion5x/Kconfig" 917585cf175STzachi Perelstein 918387798b3SRob Herringsource "arch/arm/mach-picoxcell/Kconfig" 919387798b3SRob Herring 92095b8f20fSRussell Kingsource "arch/arm/mach-pxa/Kconfig" 92195b8f20fSRussell Kingsource "arch/arm/plat-pxa/Kconfig" 9221da177e4SLinus Torvalds 92395b8f20fSRussell Kingsource "arch/arm/mach-mmp/Kconfig" 92495b8f20fSRussell King 9258fc1b0f8SKumar Galasource "arch/arm/mach-qcom/Kconfig" 9268fc1b0f8SKumar Gala 92795b8f20fSRussell Kingsource "arch/arm/mach-realview/Kconfig" 92895b8f20fSRussell King 929d63dc051SHeiko Stuebnersource "arch/arm/mach-rockchip/Kconfig" 930d63dc051SHeiko Stuebner 93195b8f20fSRussell Kingsource "arch/arm/mach-sa1100/Kconfig" 932edabd38eSSaeed Bishara 933387798b3SRob Herringsource "arch/arm/mach-socfpga/Kconfig" 934387798b3SRob Herring 935a7ed099fSArnd Bergmannsource "arch/arm/mach-spear/Kconfig" 936a21765a7SBen Dooks 93765ebcc11SSrinivas Kandagatlasource "arch/arm/mach-sti/Kconfig" 93865ebcc11SSrinivas Kandagatla 93985fd6d63SKukjin Kimsource "arch/arm/mach-s3c24xx/Kconfig" 9401da177e4SLinus Torvalds 941431107eaSBen Dookssource "arch/arm/mach-s3c64xx/Kconfig" 942a08ab637SBen Dooks 943170f4e42SKukjin Kimsource "arch/arm/mach-s5pv210/Kconfig" 944170f4e42SKukjin Kim 94583014579SKukjin Kimsource "arch/arm/mach-exynos/Kconfig" 946e509b289SRob Herringsource "arch/arm/plat-samsung/Kconfig" 947cc0e72b8SChanghwan Youn 948882d01f9SRussell Kingsource "arch/arm/mach-shmobile/Kconfig" 9491da177e4SLinus Torvalds 9503b52634fSMaxime Ripardsource "arch/arm/mach-sunxi/Kconfig" 9513b52634fSMaxime Ripard 952156a0997SBarry Songsource "arch/arm/mach-prima2/Kconfig" 953156a0997SBarry Song 954c5f80065SErik Gillingsource "arch/arm/mach-tegra/Kconfig" 955c5f80065SErik Gilling 95695b8f20fSRussell Kingsource "arch/arm/mach-u300/Kconfig" 9571da177e4SLinus Torvalds 95895b8f20fSRussell Kingsource "arch/arm/mach-ux500/Kconfig" 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig" 9611da177e4SLinus Torvalds 962ceade897SRussell Kingsource "arch/arm/mach-vexpress/Kconfig" 963420c34e4SRussell Kingsource "arch/arm/plat-versatile/Kconfig" 964ceade897SRussell King 9656f35f9a9STony Prisksource "arch/arm/mach-vt8500/Kconfig" 9666f35f9a9STony Prisk 9677ec80ddfSwanzongshunsource "arch/arm/mach-w90x900/Kconfig" 9687ec80ddfSwanzongshun 9699a45eb69SJosh Cartwrightsource "arch/arm/mach-zynq/Kconfig" 9709a45eb69SJosh Cartwright 9711da177e4SLinus Torvalds# Definitions to make life easier 9721da177e4SLinus Torvaldsconfig ARCH_ACORN 9731da177e4SLinus Torvalds bool 9741da177e4SLinus Torvalds 9757ae1f7ecSLennert Buytenhekconfig PLAT_IOP 9767ae1f7ecSLennert Buytenhek bool 977469d3044SMikael Pettersson select GENERIC_CLOCKEVENTS 9787ae1f7ecSLennert Buytenhek 97969b02f6aSLennert Buytenhekconfig PLAT_ORION 98069b02f6aSLennert Buytenhek bool 981bfe45e0bSRussell King select CLKSRC_MMIO 982b1b3f49cSRussell King select COMMON_CLK 983dc7ad3b3SRussell King select GENERIC_IRQ_CHIP 984278b45b0SAndrew Lunn select IRQ_DOMAIN 98569b02f6aSLennert Buytenhek 986abcda1dcSThomas Petazzoniconfig PLAT_ORION_LEGACY 987abcda1dcSThomas Petazzoni bool 988abcda1dcSThomas Petazzoni select PLAT_ORION 989abcda1dcSThomas Petazzoni 990bd5ce433SEric Miaoconfig PLAT_PXA 991bd5ce433SEric Miao bool 992bd5ce433SEric Miao 993f4b8b319SRussell Kingconfig PLAT_VERSATILE 994f4b8b319SRussell King bool 995f4b8b319SRussell King 996e3887714SRussell Kingconfig ARM_TIMER_SP804 997e3887714SRussell King bool 998bfe45e0bSRussell King select CLKSRC_MMIO 9997a0eca71SRob Herring select CLKSRC_OF if OF 1000e3887714SRussell King 1001d9a1beaaSAlexandre Courbotsource "arch/arm/firmware/Kconfig" 1002d9a1beaaSAlexandre Courbot 10031da177e4SLinus Torvaldssource arch/arm/mm/Kconfig 10041da177e4SLinus Torvalds 1005afe4b25eSLennert Buytenhekconfig IWMMXT 1006d93003e8SSebastian Hesselbarth bool "Enable iWMMXt support" 1007d93003e8SSebastian Hesselbarth depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B 1008d93003e8SSebastian Hesselbarth default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B 1009afe4b25eSLennert Buytenhek help 1010afe4b25eSLennert Buytenhek Enable support for iWMMXt context switching at run time if 1011afe4b25eSLennert Buytenhek running on a CPU that supports it. 1012afe4b25eSLennert Buytenhek 101352108641Seric miaoconfig MULTI_IRQ_HANDLER 101452108641Seric miao bool 101552108641Seric miao help 101652108641Seric miao Allow each machine to specify it's own IRQ handler at run time. 101752108641Seric miao 10183b93e7b0SHyok S. Choiif !MMU 10193b93e7b0SHyok S. Choisource "arch/arm/Kconfig-nommu" 10203b93e7b0SHyok S. Choiendif 10213b93e7b0SHyok S. Choi 10223e0a07f8SGregory CLEMENTconfig PJ4B_ERRATA_4742 10233e0a07f8SGregory CLEMENT bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation" 10243e0a07f8SGregory CLEMENT depends on CPU_PJ4B && MACH_ARMADA_370 10253e0a07f8SGregory CLEMENT default y 10263e0a07f8SGregory CLEMENT help 10273e0a07f8SGregory CLEMENT When coming out of either a Wait for Interrupt (WFI) or a Wait for 10283e0a07f8SGregory CLEMENT Event (WFE) IDLE states, a specific timing sensitivity exists between 10293e0a07f8SGregory CLEMENT the retiring WFI/WFE instructions and the newly issued subsequent 10303e0a07f8SGregory CLEMENT instructions. This sensitivity can result in a CPU hang scenario. 10313e0a07f8SGregory CLEMENT Workaround: 10323e0a07f8SGregory CLEMENT The software must insert either a Data Synchronization Barrier (DSB) 10333e0a07f8SGregory CLEMENT or Data Memory Barrier (DMB) command immediately after the WFI/WFE 10343e0a07f8SGregory CLEMENT instruction 10353e0a07f8SGregory CLEMENT 1036f0c4b8d6SWill Deaconconfig ARM_ERRATA_326103 1037f0c4b8d6SWill Deacon bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory" 1038f0c4b8d6SWill Deacon depends on CPU_V6 1039f0c4b8d6SWill Deacon help 1040f0c4b8d6SWill Deacon Executing a SWP instruction to read-only memory does not set bit 11 1041f0c4b8d6SWill Deacon of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to 1042f0c4b8d6SWill Deacon treat the access as a read, preventing a COW from occurring and 1043f0c4b8d6SWill Deacon causing the faulting task to livelock. 1044f0c4b8d6SWill Deacon 10459cba3cccSCatalin Marinasconfig ARM_ERRATA_411920 10469cba3cccSCatalin Marinas bool "ARM errata: Invalidation of the Instruction Cache operation can fail" 1047e399b1a4SRussell King depends on CPU_V6 || CPU_V6K 10489cba3cccSCatalin Marinas help 10499cba3cccSCatalin Marinas Invalidation of the Instruction Cache operation can 10509cba3cccSCatalin Marinas fail. This erratum is present in 1136 (before r1p4), 1156 and 1176. 10519cba3cccSCatalin Marinas It does not affect the MPCore. This option enables the ARM Ltd. 10529cba3cccSCatalin Marinas recommended workaround. 10539cba3cccSCatalin Marinas 10547ce236fcSCatalin Marinasconfig ARM_ERRATA_430973 10557ce236fcSCatalin Marinas bool "ARM errata: Stale prediction on replaced interworking branch" 10567ce236fcSCatalin Marinas depends on CPU_V7 10577ce236fcSCatalin Marinas help 10587ce236fcSCatalin Marinas This option enables the workaround for the 430973 Cortex-A8 10597ce236fcSCatalin Marinas (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb 10607ce236fcSCatalin Marinas interworking branch is replaced with another code sequence at the 10617ce236fcSCatalin Marinas same virtual address, whether due to self-modifying code or virtual 10627ce236fcSCatalin Marinas to physical address re-mapping, Cortex-A8 does not recover from the 10637ce236fcSCatalin Marinas stale interworking branch prediction. This results in Cortex-A8 10647ce236fcSCatalin Marinas executing the new code sequence in the incorrect ARM or Thumb state. 10657ce236fcSCatalin Marinas The workaround enables the BTB/BTAC operations by setting ACTLR.IBE 10667ce236fcSCatalin Marinas and also flushes the branch target cache at every context switch. 10677ce236fcSCatalin Marinas Note that setting specific bits in the ACTLR register may not be 10687ce236fcSCatalin Marinas available in non-secure mode. 10697ce236fcSCatalin Marinas 1070855c551fSCatalin Marinasconfig ARM_ERRATA_458693 1071855c551fSCatalin Marinas bool "ARM errata: Processor deadlock when a false hazard is created" 1072855c551fSCatalin Marinas depends on CPU_V7 107362e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1074855c551fSCatalin Marinas help 1075855c551fSCatalin Marinas This option enables the workaround for the 458693 Cortex-A8 (r2p0) 1076855c551fSCatalin Marinas erratum. For very specific sequences of memory operations, it is 1077855c551fSCatalin Marinas possible for a hazard condition intended for a cache line to instead 1078855c551fSCatalin Marinas be incorrectly associated with a different cache line. This false 1079855c551fSCatalin Marinas hazard might then cause a processor deadlock. The workaround enables 1080855c551fSCatalin Marinas the L1 caching of the NEON accesses and disables the PLD instruction 1081855c551fSCatalin Marinas in the ACTLR register. Note that setting specific bits in the ACTLR 1082855c551fSCatalin Marinas register may not be available in non-secure mode. 1083855c551fSCatalin Marinas 10840516e464SCatalin Marinasconfig ARM_ERRATA_460075 10850516e464SCatalin Marinas bool "ARM errata: Data written to the L2 cache can be overwritten with stale data" 10860516e464SCatalin Marinas depends on CPU_V7 108762e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 10880516e464SCatalin Marinas help 10890516e464SCatalin Marinas This option enables the workaround for the 460075 Cortex-A8 (r2p0) 10900516e464SCatalin Marinas erratum. Any asynchronous access to the L2 cache may encounter a 10910516e464SCatalin Marinas situation in which recent store transactions to the L2 cache are lost 10920516e464SCatalin Marinas and overwritten with stale memory contents from external memory. The 10930516e464SCatalin Marinas workaround disables the write-allocate mode for the L2 cache via the 10940516e464SCatalin Marinas ACTLR register. Note that setting specific bits in the ACTLR register 10950516e464SCatalin Marinas may not be available in non-secure mode. 10960516e464SCatalin Marinas 10979f05027cSWill Deaconconfig ARM_ERRATA_742230 10989f05027cSWill Deacon bool "ARM errata: DMB operation may be faulty" 10999f05027cSWill Deacon depends on CPU_V7 && SMP 110062e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 11019f05027cSWill Deacon help 11029f05027cSWill Deacon This option enables the workaround for the 742230 Cortex-A9 11039f05027cSWill Deacon (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction 11049f05027cSWill Deacon between two write operations may not ensure the correct visibility 11059f05027cSWill Deacon ordering of the two writes. This workaround sets a specific bit in 11069f05027cSWill Deacon the diagnostic register of the Cortex-A9 which causes the DMB 11079f05027cSWill Deacon instruction to behave as a DSB, ensuring the correct behaviour of 11089f05027cSWill Deacon the two writes. 11099f05027cSWill Deacon 1110a672e99bSWill Deaconconfig ARM_ERRATA_742231 1111a672e99bSWill Deacon bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption" 1112a672e99bSWill Deacon depends on CPU_V7 && SMP 111362e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1114a672e99bSWill Deacon help 1115a672e99bSWill Deacon This option enables the workaround for the 742231 Cortex-A9 1116a672e99bSWill Deacon (r2p0..r2p2) erratum. Under certain conditions, specific to the 1117a672e99bSWill Deacon Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode, 1118a672e99bSWill Deacon accessing some data located in the same cache line, may get corrupted 1119a672e99bSWill Deacon data due to bad handling of the address hazard when the line gets 1120a672e99bSWill Deacon replaced from one of the CPUs at the same time as another CPU is 1121a672e99bSWill Deacon accessing it. This workaround sets specific bits in the diagnostic 1122a672e99bSWill Deacon register of the Cortex-A9 which reduces the linefill issuing 1123a672e99bSWill Deacon capabilities of the processor. 1124a672e99bSWill Deacon 112569155794SJon Medhurstconfig ARM_ERRATA_643719 112669155794SJon Medhurst bool "ARM errata: LoUIS bit field in CLIDR register is incorrect" 112769155794SJon Medhurst depends on CPU_V7 && SMP 112869155794SJon Medhurst help 112969155794SJon Medhurst This option enables the workaround for the 643719 Cortex-A9 (prior to 113069155794SJon Medhurst r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR 113169155794SJon Medhurst register returns zero when it should return one. The workaround 113269155794SJon Medhurst corrects this value, ensuring cache maintenance operations which use 113369155794SJon Medhurst it behave as intended and avoiding data corruption. 113469155794SJon Medhurst 1135cdf357f1SWill Deaconconfig ARM_ERRATA_720789 1136cdf357f1SWill Deacon bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID" 1137e66dc745SDave Martin depends on CPU_V7 1138cdf357f1SWill Deacon help 1139cdf357f1SWill Deacon This option enables the workaround for the 720789 Cortex-A9 (prior to 1140cdf357f1SWill Deacon r2p0) erratum. A faulty ASID can be sent to the other CPUs for the 1141cdf357f1SWill Deacon broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS. 1142cdf357f1SWill Deacon As a consequence of this erratum, some TLB entries which should be 1143cdf357f1SWill Deacon invalidated are not, resulting in an incoherency in the system page 1144cdf357f1SWill Deacon tables. The workaround changes the TLB flushing routines to invalidate 1145cdf357f1SWill Deacon entries regardless of the ASID. 1146475d92fcSWill Deacon 1147475d92fcSWill Deaconconfig ARM_ERRATA_743622 1148475d92fcSWill Deacon bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption" 1149475d92fcSWill Deacon depends on CPU_V7 115062e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 1151475d92fcSWill Deacon help 1152475d92fcSWill Deacon This option enables the workaround for the 743622 Cortex-A9 1153efbc74acSWill Deacon (r2p*) erratum. Under very rare conditions, a faulty 1154475d92fcSWill Deacon optimisation in the Cortex-A9 Store Buffer may lead to data 1155475d92fcSWill Deacon corruption. This workaround sets a specific bit in the diagnostic 1156475d92fcSWill Deacon register of the Cortex-A9 which disables the Store Buffer 1157475d92fcSWill Deacon optimisation, preventing the defect from occurring. This has no 1158475d92fcSWill Deacon visible impact on the overall performance or power consumption of the 1159475d92fcSWill Deacon processor. 1160475d92fcSWill Deacon 11619a27c27cSWill Deaconconfig ARM_ERRATA_751472 11629a27c27cSWill Deacon bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation" 1163ba90c516SDave Martin depends on CPU_V7 116462e4d357SRob Herring depends on !ARCH_MULTIPLATFORM 11659a27c27cSWill Deacon help 11669a27c27cSWill Deacon This option enables the workaround for the 751472 Cortex-A9 (prior 11679a27c27cSWill Deacon to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the 11689a27c27cSWill Deacon completion of a following broadcasted operation if the second 11699a27c27cSWill Deacon operation is received by a CPU before the ICIALLUIS has completed, 11709a27c27cSWill Deacon potentially leading to corrupted entries in the cache or TLB. 11719a27c27cSWill Deacon 1172fcbdc5feSWill Deaconconfig ARM_ERRATA_754322 1173fcbdc5feSWill Deacon bool "ARM errata: possible faulty MMU translations following an ASID switch" 1174fcbdc5feSWill Deacon depends on CPU_V7 1175fcbdc5feSWill Deacon help 1176fcbdc5feSWill Deacon This option enables the workaround for the 754322 Cortex-A9 (r2p*, 1177fcbdc5feSWill Deacon r3p*) erratum. A speculative memory access may cause a page table walk 1178fcbdc5feSWill Deacon which starts prior to an ASID switch but completes afterwards. This 1179fcbdc5feSWill Deacon can populate the micro-TLB with a stale entry which may be hit with 1180fcbdc5feSWill Deacon the new ASID. This workaround places two dsb instructions in the mm 1181fcbdc5feSWill Deacon switching code so that no page table walks can cross the ASID switch. 1182fcbdc5feSWill Deacon 11835dab26afSWill Deaconconfig ARM_ERRATA_754327 11845dab26afSWill Deacon bool "ARM errata: no automatic Store Buffer drain" 11855dab26afSWill Deacon depends on CPU_V7 && SMP 11865dab26afSWill Deacon help 11875dab26afSWill Deacon This option enables the workaround for the 754327 Cortex-A9 (prior to 11885dab26afSWill Deacon r2p0) erratum. The Store Buffer does not have any automatic draining 11895dab26afSWill Deacon mechanism and therefore a livelock may occur if an external agent 11905dab26afSWill Deacon continuously polls a memory location waiting to observe an update. 11915dab26afSWill Deacon This workaround defines cpu_relax() as smp_mb(), preventing correctly 11925dab26afSWill Deacon written polling loops from denying visibility of updates to memory. 11935dab26afSWill Deacon 1194145e10e1SCatalin Marinasconfig ARM_ERRATA_364296 1195145e10e1SCatalin Marinas bool "ARM errata: Possible cache data corruption with hit-under-miss enabled" 1196fd832478SFabio Estevam depends on CPU_V6 1197145e10e1SCatalin Marinas help 1198145e10e1SCatalin Marinas This options enables the workaround for the 364296 ARM1136 1199145e10e1SCatalin Marinas r0p2 erratum (possible cache data corruption with 1200145e10e1SCatalin Marinas hit-under-miss enabled). It sets the undocumented bit 31 in 1201145e10e1SCatalin Marinas the auxiliary control register and the FI bit in the control 1202145e10e1SCatalin Marinas register, thus disabling hit-under-miss without putting the 1203145e10e1SCatalin Marinas processor into full low interrupt latency mode. ARM11MPCore 1204145e10e1SCatalin Marinas is not affected. 1205145e10e1SCatalin Marinas 1206f630c1bdSWill Deaconconfig ARM_ERRATA_764369 1207f630c1bdSWill Deacon bool "ARM errata: Data cache line maintenance operation by MVA may not succeed" 1208f630c1bdSWill Deacon depends on CPU_V7 && SMP 1209f630c1bdSWill Deacon help 1210f630c1bdSWill Deacon This option enables the workaround for erratum 764369 1211f630c1bdSWill Deacon affecting Cortex-A9 MPCore with two or more processors (all 1212f630c1bdSWill Deacon current revisions). Under certain timing circumstances, a data 1213f630c1bdSWill Deacon cache line maintenance operation by MVA targeting an Inner 1214f630c1bdSWill Deacon Shareable memory region may fail to proceed up to either the 1215f630c1bdSWill Deacon Point of Coherency or to the Point of Unification of the 1216f630c1bdSWill Deacon system. This workaround adds a DSB instruction before the 1217f630c1bdSWill Deacon relevant cache maintenance functions and sets a specific bit 1218f630c1bdSWill Deacon in the diagnostic control register of the SCU. 1219f630c1bdSWill Deacon 12207253b85cSSimon Hormanconfig ARM_ERRATA_775420 12217253b85cSSimon Horman bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock" 12227253b85cSSimon Horman depends on CPU_V7 12237253b85cSSimon Horman help 12247253b85cSSimon Horman This option enables the workaround for the 775420 Cortex-A9 (r2p2, 12257253b85cSSimon Horman r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance 12267253b85cSSimon Horman operation aborts with MMU exception, it might cause the processor 12277253b85cSSimon Horman to deadlock. This workaround puts DSB before executing ISB if 12287253b85cSSimon Horman an abort may occur on cache maintenance. 12297253b85cSSimon Horman 123093dc6887SCatalin Marinasconfig ARM_ERRATA_798181 123193dc6887SCatalin Marinas bool "ARM errata: TLBI/DSB failure on Cortex-A15" 123293dc6887SCatalin Marinas depends on CPU_V7 && SMP 123393dc6887SCatalin Marinas help 123493dc6887SCatalin Marinas On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not 123593dc6887SCatalin Marinas adequately shooting down all use of the old entries. This 123693dc6887SCatalin Marinas option enables the Linux kernel workaround for this erratum 123793dc6887SCatalin Marinas which sends an IPI to the CPUs that are running the same ASID 123893dc6887SCatalin Marinas as the one being invalidated. 123993dc6887SCatalin Marinas 124084b6504fSWill Deaconconfig ARM_ERRATA_773022 124184b6504fSWill Deacon bool "ARM errata: incorrect instructions may be executed from loop buffer" 124284b6504fSWill Deacon depends on CPU_V7 124384b6504fSWill Deacon help 124484b6504fSWill Deacon This option enables the workaround for the 773022 Cortex-A15 124584b6504fSWill Deacon (up to r0p4) erratum. In certain rare sequences of code, the 124684b6504fSWill Deacon loop buffer may deliver incorrect instructions. This 124784b6504fSWill Deacon workaround disables the loop buffer to avoid the erratum. 124884b6504fSWill Deacon 12491da177e4SLinus Torvaldsendmenu 12501da177e4SLinus Torvalds 12511da177e4SLinus Torvaldssource "arch/arm/common/Kconfig" 12521da177e4SLinus Torvalds 12531da177e4SLinus Torvaldsmenu "Bus support" 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvaldsconfig ARM_AMBA 12561da177e4SLinus Torvalds bool 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvaldsconfig ISA 12591da177e4SLinus Torvalds bool 12601da177e4SLinus Torvalds help 12611da177e4SLinus Torvalds Find out whether you have ISA slots on your motherboard. ISA is the 12621da177e4SLinus Torvalds name of a bus system, i.e. the way the CPU talks to the other stuff 12631da177e4SLinus Torvalds inside your box. Other bus systems are PCI, EISA, MicroChannel 12641da177e4SLinus Torvalds (MCA) or VESA. ISA is an older system, now being displaced by PCI; 12651da177e4SLinus Torvalds newer boards don't support it. If you have ISA, say Y, otherwise N. 12661da177e4SLinus Torvalds 1267065909b9SRussell King# Select ISA DMA controller support 12681da177e4SLinus Torvaldsconfig ISA_DMA 12691da177e4SLinus Torvalds bool 1270065909b9SRussell King select ISA_DMA_API 12711da177e4SLinus Torvalds 1272065909b9SRussell King# Select ISA DMA interface 12735cae841bSAl Viroconfig ISA_DMA_API 12745cae841bSAl Viro bool 12755cae841bSAl Viro 12761da177e4SLinus Torvaldsconfig PCI 12770b05da72SHans Ulli Kroll bool "PCI support" if MIGHT_HAVE_PCI 12781da177e4SLinus Torvalds help 12791da177e4SLinus Torvalds Find out whether you have a PCI motherboard. PCI is the name of a 12801da177e4SLinus Torvalds bus system, i.e. the way the CPU talks to the other stuff inside 12811da177e4SLinus Torvalds your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or 12821da177e4SLinus Torvalds VESA. If you have PCI, say Y, otherwise N. 12831da177e4SLinus Torvalds 128452882173SAnton Vorontsovconfig PCI_DOMAINS 128552882173SAnton Vorontsov bool 128652882173SAnton Vorontsov depends on PCI 128752882173SAnton Vorontsov 1288b080ac8aSMarcelo Roberto Jimenezconfig PCI_NANOENGINE 1289b080ac8aSMarcelo Roberto Jimenez bool "BSE nanoEngine PCI support" 1290b080ac8aSMarcelo Roberto Jimenez depends on SA1100_NANOENGINE 1291b080ac8aSMarcelo Roberto Jimenez help 1292b080ac8aSMarcelo Roberto Jimenez Enable PCI on the BSE nanoEngine board. 1293b080ac8aSMarcelo Roberto Jimenez 129436e23590SMatthew Wilcoxconfig PCI_SYSCALL 129536e23590SMatthew Wilcox def_bool PCI 129636e23590SMatthew Wilcox 1297a0113a99SMike Rapoportconfig PCI_HOST_ITE8152 1298a0113a99SMike Rapoport bool 1299a0113a99SMike Rapoport depends on PCI && MACH_ARMCORE 1300a0113a99SMike Rapoport default y 1301a0113a99SMike Rapoport select DMABOUNCE 1302a0113a99SMike Rapoport 13031da177e4SLinus Torvaldssource "drivers/pci/Kconfig" 13043f06d157SJingoo Hansource "drivers/pci/pcie/Kconfig" 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig" 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvaldsendmenu 13091da177e4SLinus Torvalds 13101da177e4SLinus Torvaldsmenu "Kernel Features" 13111da177e4SLinus Torvalds 13123b55658aSDave Martinconfig HAVE_SMP 13133b55658aSDave Martin bool 13143b55658aSDave Martin help 13153b55658aSDave Martin This option should be selected by machines which have an SMP- 13163b55658aSDave Martin capable CPU. 13173b55658aSDave Martin 13183b55658aSDave Martin The only effect of this option is to make the SMP-related 13193b55658aSDave Martin options available to the user for configuration. 13203b55658aSDave Martin 13211da177e4SLinus Torvaldsconfig SMP 1322bb2d8130SRussell King bool "Symmetric Multi-Processing" 1323fbb4ddacSRussell King depends on CPU_V6K || CPU_V7 1324bc28248eSRussell King depends on GENERIC_CLOCKEVENTS 13253b55658aSDave Martin depends on HAVE_SMP 1326801bb21cSJonathan Austin depends on MMU || ARM_MPU 13271da177e4SLinus Torvalds help 13281da177e4SLinus Torvalds This enables support for systems with more than one CPU. If you have 13294a474157SRobert Graffham a system with only one CPU, say N. If you have a system with more 13304a474157SRobert Graffham than one CPU, say Y. 13311da177e4SLinus Torvalds 13324a474157SRobert Graffham If you say N here, the kernel will run on uni- and multiprocessor 13331da177e4SLinus Torvalds machines, but will use only one CPU of a multiprocessor machine. If 13344a474157SRobert Graffham you say Y here, the kernel will run on many, but not all, 13354a474157SRobert Graffham uniprocessor machines. On a uniprocessor machine, the kernel 13364a474157SRobert Graffham will run faster if you say N here. 13371da177e4SLinus Torvalds 1338395cf969SPaul Bolle See also <file:Documentation/x86/i386/IO-APIC.txt>, 13391da177e4SLinus Torvalds <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at 134050a23e6eSJustin P. Mattock <http://tldp.org/HOWTO/SMP-HOWTO.html>. 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds If you don't know what to do here, say N. 13431da177e4SLinus Torvalds 1344f00ec48fSRussell Kingconfig SMP_ON_UP 1345f00ec48fSRussell King bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)" 1346801bb21cSJonathan Austin depends on SMP && !XIP_KERNEL && MMU 1347f00ec48fSRussell King default y 1348f00ec48fSRussell King help 1349f00ec48fSRussell King SMP kernels contain instructions which fail on non-SMP processors. 1350f00ec48fSRussell King Enabling this option allows the kernel to modify itself to make 1351f00ec48fSRussell King these instructions safe. Disabling it allows about 1K of space 1352f00ec48fSRussell King savings. 1353f00ec48fSRussell King 1354f00ec48fSRussell King If you don't know what to do here, say Y. 1355f00ec48fSRussell King 1356c9018aabSVincent Guittotconfig ARM_CPU_TOPOLOGY 1357c9018aabSVincent Guittot bool "Support cpu topology definition" 1358c9018aabSVincent Guittot depends on SMP && CPU_V7 1359c9018aabSVincent Guittot default y 1360c9018aabSVincent Guittot help 1361c9018aabSVincent Guittot Support ARM cpu topology definition. The MPIDR register defines 1362c9018aabSVincent Guittot affinity between processors which is then used to describe the cpu 1363c9018aabSVincent Guittot topology of an ARM System. 1364c9018aabSVincent Guittot 1365c9018aabSVincent Guittotconfig SCHED_MC 1366c9018aabSVincent Guittot bool "Multi-core scheduler support" 1367c9018aabSVincent Guittot depends on ARM_CPU_TOPOLOGY 1368c9018aabSVincent Guittot help 1369c9018aabSVincent Guittot Multi-core scheduler support improves the CPU scheduler's decision 1370c9018aabSVincent Guittot making when dealing with multi-core CPU chips at a cost of slightly 1371c9018aabSVincent Guittot increased overhead in some places. If unsure say N here. 1372c9018aabSVincent Guittot 1373c9018aabSVincent Guittotconfig SCHED_SMT 1374c9018aabSVincent Guittot bool "SMT scheduler support" 1375c9018aabSVincent Guittot depends on ARM_CPU_TOPOLOGY 1376c9018aabSVincent Guittot help 1377c9018aabSVincent Guittot Improves the CPU scheduler's decision making when dealing with 1378c9018aabSVincent Guittot MultiThreading at a cost of slightly increased overhead in some 1379c9018aabSVincent Guittot places. If unsure say N here. 1380c9018aabSVincent Guittot 1381a8cbcd92SRussell Kingconfig HAVE_ARM_SCU 1382a8cbcd92SRussell King bool 1383a8cbcd92SRussell King help 1384a8cbcd92SRussell King This option enables support for the ARM system coherency unit 1385a8cbcd92SRussell King 13868a4da6e3SMark Rutlandconfig HAVE_ARM_ARCH_TIMER 1387022c03a2SMarc Zyngier bool "Architected timer support" 1388022c03a2SMarc Zyngier depends on CPU_V7 13898a4da6e3SMark Rutland select ARM_ARCH_TIMER 13900c403462SWill Deacon select GENERIC_CLOCKEVENTS 1391022c03a2SMarc Zyngier help 1392022c03a2SMarc Zyngier This option enables support for the ARM architected timer 1393022c03a2SMarc Zyngier 1394f32f4ce2SRussell Kingconfig HAVE_ARM_TWD 1395f32f4ce2SRussell King bool 1396f32f4ce2SRussell King depends on SMP 1397da4a686aSRob Herring select CLKSRC_OF if OF 1398f32f4ce2SRussell King help 1399f32f4ce2SRussell King This options enables support for the ARM timer and watchdog unit 1400f32f4ce2SRussell King 1401e8db288eSNicolas Pitreconfig MCPM 1402e8db288eSNicolas Pitre bool "Multi-Cluster Power Management" 1403e8db288eSNicolas Pitre depends on CPU_V7 && SMP 1404e8db288eSNicolas Pitre help 1405e8db288eSNicolas Pitre This option provides the common power management infrastructure 1406e8db288eSNicolas Pitre for (multi-)cluster based systems, such as big.LITTLE based 1407e8db288eSNicolas Pitre systems. 1408e8db288eSNicolas Pitre 14091c33be57SNicolas Pitreconfig BIG_LITTLE 14101c33be57SNicolas Pitre bool "big.LITTLE support (Experimental)" 14111c33be57SNicolas Pitre depends on CPU_V7 && SMP 14121c33be57SNicolas Pitre select MCPM 14131c33be57SNicolas Pitre help 14141c33be57SNicolas Pitre This option enables support selections for the big.LITTLE 14151c33be57SNicolas Pitre system architecture. 14161c33be57SNicolas Pitre 14171c33be57SNicolas Pitreconfig BL_SWITCHER 14181c33be57SNicolas Pitre bool "big.LITTLE switcher support" 14191c33be57SNicolas Pitre depends on BIG_LITTLE && MCPM && HOTPLUG_CPU 14201c33be57SNicolas Pitre select ARM_CPU_SUSPEND 142151aaf81fSRussell King select CPU_PM 14221c33be57SNicolas Pitre help 14231c33be57SNicolas Pitre The big.LITTLE "switcher" provides the core functionality to 14241c33be57SNicolas Pitre transparently handle transition between a cluster of A15's 14251c33be57SNicolas Pitre and a cluster of A7's in a big.LITTLE system. 14261c33be57SNicolas Pitre 1427b22537c6SNicolas Pitreconfig BL_SWITCHER_DUMMY_IF 1428b22537c6SNicolas Pitre tristate "Simple big.LITTLE switcher user interface" 1429b22537c6SNicolas Pitre depends on BL_SWITCHER && DEBUG_KERNEL 1430b22537c6SNicolas Pitre help 1431b22537c6SNicolas Pitre This is a simple and dummy char dev interface to control 1432b22537c6SNicolas Pitre the big.LITTLE switcher core code. It is meant for 1433b22537c6SNicolas Pitre debugging purposes only. 1434b22537c6SNicolas Pitre 14358d5796d2SLennert Buytenhekchoice 14368d5796d2SLennert Buytenhek prompt "Memory split" 1437006fa259SRussell King depends on MMU 14388d5796d2SLennert Buytenhek default VMSPLIT_3G 14398d5796d2SLennert Buytenhek help 14408d5796d2SLennert Buytenhek Select the desired split between kernel and user memory. 14418d5796d2SLennert Buytenhek 14428d5796d2SLennert Buytenhek If you are not absolutely sure what you are doing, leave this 14438d5796d2SLennert Buytenhek option alone! 14448d5796d2SLennert Buytenhek 14458d5796d2SLennert Buytenhek config VMSPLIT_3G 14468d5796d2SLennert Buytenhek bool "3G/1G user/kernel split" 14478d5796d2SLennert Buytenhek config VMSPLIT_2G 14488d5796d2SLennert Buytenhek bool "2G/2G user/kernel split" 14498d5796d2SLennert Buytenhek config VMSPLIT_1G 14508d5796d2SLennert Buytenhek bool "1G/3G user/kernel split" 14518d5796d2SLennert Buytenhekendchoice 14528d5796d2SLennert Buytenhek 14538d5796d2SLennert Buytenhekconfig PAGE_OFFSET 14548d5796d2SLennert Buytenhek hex 1455006fa259SRussell King default PHYS_OFFSET if !MMU 14568d5796d2SLennert Buytenhek default 0x40000000 if VMSPLIT_1G 14578d5796d2SLennert Buytenhek default 0x80000000 if VMSPLIT_2G 14588d5796d2SLennert Buytenhek default 0xC0000000 14598d5796d2SLennert Buytenhek 14601da177e4SLinus Torvaldsconfig NR_CPUS 14611da177e4SLinus Torvalds int "Maximum number of CPUs (2-32)" 14621da177e4SLinus Torvalds range 2 32 14631da177e4SLinus Torvalds depends on SMP 14641da177e4SLinus Torvalds default "4" 14651da177e4SLinus Torvalds 1466a054a811SRussell Kingconfig HOTPLUG_CPU 146700b7dedeSRussell King bool "Support for hot-pluggable CPUs" 146840b31360SStephen Rothwell depends on SMP 1469a054a811SRussell King help 1470a054a811SRussell King Say Y here to experiment with turning CPUs off and on. CPUs 1471a054a811SRussell King can be controlled through /sys/devices/system/cpu. 1472a054a811SRussell King 14732bdd424fSWill Deaconconfig ARM_PSCI 14742bdd424fSWill Deacon bool "Support for the ARM Power State Coordination Interface (PSCI)" 14752bdd424fSWill Deacon depends on CPU_V7 14762bdd424fSWill Deacon help 14772bdd424fSWill Deacon Say Y here if you want Linux to communicate with system firmware 14782bdd424fSWill Deacon implementing the PSCI specification for CPU-centric power 14792bdd424fSWill Deacon management operations described in ARM document number ARM DEN 14802bdd424fSWill Deacon 0022A ("Power State Coordination Interface System Software on 14812bdd424fSWill Deacon ARM processors"). 14822bdd424fSWill Deacon 14832a6ad871SMaxime Ripard# The GPIO number here must be sorted by descending number. In case of 14842a6ad871SMaxime Ripard# a multiplatform kernel, we just want the highest value required by the 14852a6ad871SMaxime Ripard# selected platforms. 148644986ab0SPeter De Schrijver (NVIDIA)config ARCH_NR_GPIO 148744986ab0SPeter De Schrijver (NVIDIA) int 14883dea19e8SPeter De Schrijver (NVIDIA) default 1024 if ARCH_SHMOBILE || ARCH_TEGRA 1489aa42587aSTomasz Figa default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \ 1490aa42587aSTomasz Figa SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210 1491eb171a99SBoris BREZILLON default 416 if ARCH_SUNXI 149206b851e5SOlof Johansson default 392 if ARCH_U8500 149301bb914cSTony Prisk default 352 if ARCH_VT8500 14947b5da4c3SHeiko Stuebner default 288 if ARCH_ROCKCHIP 14952a6ad871SMaxime Ripard default 264 if MACH_H4700 149644986ab0SPeter De Schrijver (NVIDIA) default 0 149744986ab0SPeter De Schrijver (NVIDIA) help 149844986ab0SPeter De Schrijver (NVIDIA) Maximum number of GPIOs in the system. 149944986ab0SPeter De Schrijver (NVIDIA) 150044986ab0SPeter De Schrijver (NVIDIA) If unsure, leave the default value. 150144986ab0SPeter De Schrijver (NVIDIA) 1502d45a398fSUwe Kleine-Königsource kernel/Kconfig.preempt 15031da177e4SLinus Torvalds 1504c9218b16SRussell Kingconfig HZ_FIXED 1505f8065813SRussell King int 1506070b8b43SKukjin Kim default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \ 1507a73ddc61SKukjin Kim ARCH_S5PV210 || ARCH_EXYNOS4 15085248c657SDavid Brownell default AT91_TIMER_HZ if ARCH_AT91 1509bf98c1eaSLaurent Pinchart default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY 151047d84682SRussell King default 0 1511c9218b16SRussell King 1512c9218b16SRussell Kingchoice 151347d84682SRussell King depends on HZ_FIXED = 0 1514c9218b16SRussell King prompt "Timer frequency" 1515c9218b16SRussell King 1516c9218b16SRussell Kingconfig HZ_100 1517c9218b16SRussell King bool "100 Hz" 1518c9218b16SRussell King 1519c9218b16SRussell Kingconfig HZ_200 1520c9218b16SRussell King bool "200 Hz" 1521c9218b16SRussell King 1522c9218b16SRussell Kingconfig HZ_250 1523c9218b16SRussell King bool "250 Hz" 1524c9218b16SRussell King 1525c9218b16SRussell Kingconfig HZ_300 1526c9218b16SRussell King bool "300 Hz" 1527c9218b16SRussell King 1528c9218b16SRussell Kingconfig HZ_500 1529c9218b16SRussell King bool "500 Hz" 1530c9218b16SRussell King 1531c9218b16SRussell Kingconfig HZ_1000 1532c9218b16SRussell King bool "1000 Hz" 1533c9218b16SRussell King 1534c9218b16SRussell Kingendchoice 1535c9218b16SRussell King 1536c9218b16SRussell Kingconfig HZ 1537c9218b16SRussell King int 153847d84682SRussell King default HZ_FIXED if HZ_FIXED != 0 1539c9218b16SRussell King default 100 if HZ_100 1540c9218b16SRussell King default 200 if HZ_200 1541c9218b16SRussell King default 250 if HZ_250 1542c9218b16SRussell King default 300 if HZ_300 1543c9218b16SRussell King default 500 if HZ_500 1544c9218b16SRussell King default 1000 1545c9218b16SRussell King 1546c9218b16SRussell Kingconfig SCHED_HRTICK 1547c9218b16SRussell King def_bool HIGH_RES_TIMERS 1548f8065813SRussell King 154916c79651SCatalin Marinasconfig THUMB2_KERNEL 1550bc7dea00SUwe Kleine-König bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY 15514477ca45SUwe Kleine-König depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K 1552bc7dea00SUwe Kleine-König default y if CPU_THUMBONLY 155316c79651SCatalin Marinas select AEABI 155416c79651SCatalin Marinas select ARM_ASM_UNIFIED 155589bace65SArnd Bergmann select ARM_UNWIND 155616c79651SCatalin Marinas help 155716c79651SCatalin Marinas By enabling this option, the kernel will be compiled in 155816c79651SCatalin Marinas Thumb-2 mode. A compiler/assembler that understand the unified 155916c79651SCatalin Marinas ARM-Thumb syntax is needed. 156016c79651SCatalin Marinas 156116c79651SCatalin Marinas If unsure, say N. 156216c79651SCatalin Marinas 15636f685c5cSDave Martinconfig THUMB2_AVOID_R_ARM_THM_JUMP11 15646f685c5cSDave Martin bool "Work around buggy Thumb-2 short branch relocations in gas" 15656f685c5cSDave Martin depends on THUMB2_KERNEL && MODULES 15666f685c5cSDave Martin default y 15676f685c5cSDave Martin help 15686f685c5cSDave Martin Various binutils versions can resolve Thumb-2 branches to 15696f685c5cSDave Martin locally-defined, preemptible global symbols as short-range "b.n" 15706f685c5cSDave Martin branch instructions. 15716f685c5cSDave Martin 15726f685c5cSDave Martin This is a problem, because there's no guarantee the final 15736f685c5cSDave Martin destination of the symbol, or any candidate locations for a 15746f685c5cSDave Martin trampoline, are within range of the branch. For this reason, the 15756f685c5cSDave Martin kernel does not support fixing up the R_ARM_THM_JUMP11 (102) 15766f685c5cSDave Martin relocation in modules at all, and it makes little sense to add 15776f685c5cSDave Martin support. 15786f685c5cSDave Martin 15796f685c5cSDave Martin The symptom is that the kernel fails with an "unsupported 15806f685c5cSDave Martin relocation" error when loading some modules. 15816f685c5cSDave Martin 15826f685c5cSDave Martin Until fixed tools are available, passing 15836f685c5cSDave Martin -fno-optimize-sibling-calls to gcc should prevent gcc generating 15846f685c5cSDave Martin code which hits this problem, at the cost of a bit of extra runtime 15856f685c5cSDave Martin stack usage in some cases. 15866f685c5cSDave Martin 15876f685c5cSDave Martin The problem is described in more detail at: 15886f685c5cSDave Martin https://bugs.launchpad.net/binutils-linaro/+bug/725126 15896f685c5cSDave Martin 15906f685c5cSDave Martin Only Thumb-2 kernels are affected. 15916f685c5cSDave Martin 15926f685c5cSDave Martin Unless you are sure your tools don't have this problem, say Y. 15936f685c5cSDave Martin 15940becb088SCatalin Marinasconfig ARM_ASM_UNIFIED 15950becb088SCatalin Marinas bool 15960becb088SCatalin Marinas 1597704bdda0SNicolas Pitreconfig AEABI 1598704bdda0SNicolas Pitre bool "Use the ARM EABI to compile the kernel" 1599704bdda0SNicolas Pitre help 1600704bdda0SNicolas Pitre This option allows for the kernel to be compiled using the latest 1601704bdda0SNicolas Pitre ARM ABI (aka EABI). This is only useful if you are using a user 1602704bdda0SNicolas Pitre space environment that is also compiled with EABI. 1603704bdda0SNicolas Pitre 1604704bdda0SNicolas Pitre Since there are major incompatibilities between the legacy ABI and 1605704bdda0SNicolas Pitre EABI, especially with regard to structure member alignment, this 1606704bdda0SNicolas Pitre option also changes the kernel syscall calling convention to 1607704bdda0SNicolas Pitre disambiguate both ABIs and allow for backward compatibility support 1608704bdda0SNicolas Pitre (selected with CONFIG_OABI_COMPAT). 1609704bdda0SNicolas Pitre 1610704bdda0SNicolas Pitre To use this you need GCC version 4.0.0 or later. 1611704bdda0SNicolas Pitre 16126c90c872SNicolas Pitreconfig OABI_COMPAT 1613a73a3ff1SRussell King bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)" 1614d6f94fa0SKees Cook depends on AEABI && !THUMB2_KERNEL 16156c90c872SNicolas Pitre help 16166c90c872SNicolas Pitre This option preserves the old syscall interface along with the 16176c90c872SNicolas Pitre new (ARM EABI) one. It also provides a compatibility layer to 16186c90c872SNicolas Pitre intercept syscalls that have structure arguments which layout 16196c90c872SNicolas Pitre in memory differs between the legacy ABI and the new ARM EABI 16206c90c872SNicolas Pitre (only for non "thumb" binaries). This option adds a tiny 16216c90c872SNicolas Pitre overhead to all syscalls and produces a slightly larger kernel. 162291702175SKees Cook 162391702175SKees Cook The seccomp filter system will not be available when this is 162491702175SKees Cook selected, since there is no way yet to sensibly distinguish 162591702175SKees Cook between calling conventions during filtering. 162691702175SKees Cook 16276c90c872SNicolas Pitre If you know you'll be using only pure EABI user space then you 16286c90c872SNicolas Pitre can say N here. If this option is not selected and you attempt 16296c90c872SNicolas Pitre to execute a legacy ABI binary then the result will be 16306c90c872SNicolas Pitre UNPREDICTABLE (in fact it can be predicted that it won't work 1631b02f8467SKees Cook at all). If in doubt say N. 16326c90c872SNicolas Pitre 1633eb33575cSMel Gormanconfig ARCH_HAS_HOLES_MEMORYMODEL 1634e80d6a24SMel Gorman bool 1635e80d6a24SMel Gorman 163605944d74SRussell Kingconfig ARCH_SPARSEMEM_ENABLE 163705944d74SRussell King bool 163805944d74SRussell King 163907a2f737SRussell Kingconfig ARCH_SPARSEMEM_DEFAULT 164007a2f737SRussell King def_bool ARCH_SPARSEMEM_ENABLE 164107a2f737SRussell King 164205944d74SRussell Kingconfig ARCH_SELECT_MEMORY_MODEL 1643be370302SRussell King def_bool ARCH_SPARSEMEM_ENABLE 1644c80d79d7SYasunori Goto 16457b7bf499SWill Deaconconfig HAVE_ARCH_PFN_VALID 16467b7bf499SWill Deacon def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM 16477b7bf499SWill Deacon 1648053a96caSNicolas Pitreconfig HIGHMEM 1649e8db89a2SRussell King bool "High Memory Support" 1650e8db89a2SRussell King depends on MMU 1651053a96caSNicolas Pitre help 1652053a96caSNicolas Pitre The address space of ARM processors is only 4 Gigabytes large 1653053a96caSNicolas Pitre and it has to accommodate user address space, kernel address 1654053a96caSNicolas Pitre space as well as some memory mapped IO. That means that, if you 1655053a96caSNicolas Pitre have a large amount of physical memory and/or IO, not all of the 1656053a96caSNicolas Pitre memory can be "permanently mapped" by the kernel. The physical 1657053a96caSNicolas Pitre memory that is not permanently mapped is called "high memory". 1658053a96caSNicolas Pitre 1659053a96caSNicolas Pitre Depending on the selected kernel/user memory split, minimum 1660053a96caSNicolas Pitre vmalloc space and actual amount of RAM, you may not need this 1661053a96caSNicolas Pitre option which should result in a slightly faster kernel. 1662053a96caSNicolas Pitre 1663053a96caSNicolas Pitre If unsure, say n. 1664053a96caSNicolas Pitre 166565cec8e3SRussell Kingconfig HIGHPTE 166665cec8e3SRussell King bool "Allocate 2nd-level pagetables from highmem" 166765cec8e3SRussell King depends on HIGHMEM 166865cec8e3SRussell King 16691b8873a0SJamie Ilesconfig HW_PERF_EVENTS 16701b8873a0SJamie Iles bool "Enable hardware performance counter support for perf events" 1671f0d1bc47SWill Deacon depends on PERF_EVENTS 16721b8873a0SJamie Iles default y 16731b8873a0SJamie Iles help 16741b8873a0SJamie Iles Enable hardware performance counter support for perf events. If 16751b8873a0SJamie Iles disabled, perf events will use software events only. 16761b8873a0SJamie Iles 16771355e2a6SCatalin Marinasconfig SYS_SUPPORTS_HUGETLBFS 16781355e2a6SCatalin Marinas def_bool y 16791355e2a6SCatalin Marinas depends on ARM_LPAE 16801355e2a6SCatalin Marinas 16818d962507SCatalin Marinasconfig HAVE_ARCH_TRANSPARENT_HUGEPAGE 16828d962507SCatalin Marinas def_bool y 16838d962507SCatalin Marinas depends on ARM_LPAE 16848d962507SCatalin Marinas 16854bfab203SSteven Capperconfig ARCH_WANT_GENERAL_HUGETLB 16864bfab203SSteven Capper def_bool y 16874bfab203SSteven Capper 16883f22ab27SDave Hansensource "mm/Kconfig" 16893f22ab27SDave Hansen 1690c1b2d970SMagnus Dammconfig FORCE_MAX_ZONEORDER 1691bf98c1eaSLaurent Pinchart int "Maximum zone order" if ARCH_SHMOBILE_LEGACY 1692bf98c1eaSLaurent Pinchart range 11 64 if ARCH_SHMOBILE_LEGACY 1693898f08e1SYegor Yefremov default "12" if SOC_AM33XX 16946d85e2b0SUwe Kleine-König default "9" if SA1111 || ARCH_EFM32 1695c1b2d970SMagnus Damm default "11" 1696c1b2d970SMagnus Damm help 1697c1b2d970SMagnus Damm The kernel memory allocator divides physically contiguous memory 1698c1b2d970SMagnus Damm blocks into "zones", where each zone is a power of two number of 1699c1b2d970SMagnus Damm pages. This option selects the largest power of two that the kernel 1700c1b2d970SMagnus Damm keeps in the memory allocator. If you need to allocate very large 1701c1b2d970SMagnus Damm blocks of physically contiguous memory, then you may need to 1702c1b2d970SMagnus Damm increase this value. 1703c1b2d970SMagnus Damm 1704c1b2d970SMagnus Damm This config option is actually maximum order plus one. For example, 1705c1b2d970SMagnus Damm a value of 11 means that the largest free memory block is 2^10 pages. 1706c1b2d970SMagnus Damm 17071da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP 17081da177e4SLinus Torvalds bool 1709f12d0d7cSHyok S. Choi depends on CPU_CP15_MMU 17101da177e4SLinus Torvalds default y if !ARCH_EBSA110 1711e119bfffSRussell King select HAVE_PROC_CPU if PROC_FS 17121da177e4SLinus Torvalds help 17131da177e4SLinus Torvalds ARM processors cannot fetch/store information which is not 17141da177e4SLinus Torvalds naturally aligned on the bus, i.e., a 4 byte fetch must start at an 17151da177e4SLinus Torvalds address divisible by 4. On 32-bit ARM processors, these non-aligned 17161da177e4SLinus Torvalds fetch/store instructions will be emulated in software if you say 17171da177e4SLinus Torvalds here, which has a severe performance impact. This is necessary for 17181da177e4SLinus Torvalds correct operation of some network protocols. With an IP-only 17191da177e4SLinus Torvalds configuration it is safe to say N, otherwise say Y. 17201da177e4SLinus Torvalds 172139ec58f3SLennert Buytenhekconfig UACCESS_WITH_MEMCPY 172238ef2ad5SLinus Walleij bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()" 172338ef2ad5SLinus Walleij depends on MMU 172439ec58f3SLennert Buytenhek default y if CPU_FEROCEON 172539ec58f3SLennert Buytenhek help 172639ec58f3SLennert Buytenhek Implement faster copy_to_user and clear_user methods for CPU 172739ec58f3SLennert Buytenhek cores where a 8-word STM instruction give significantly higher 172839ec58f3SLennert Buytenhek memory write throughput than a sequence of individual 32bit stores. 172939ec58f3SLennert Buytenhek 173039ec58f3SLennert Buytenhek A possible side effect is a slight increase in scheduling latency 173139ec58f3SLennert Buytenhek between threads sharing the same address space if they invoke 173239ec58f3SLennert Buytenhek such copy operations with large buffers. 173339ec58f3SLennert Buytenhek 173439ec58f3SLennert Buytenhek However, if the CPU data cache is using a write-allocate mode, 173539ec58f3SLennert Buytenhek this option is unlikely to provide any performance gain. 173639ec58f3SLennert Buytenhek 173770c70d97SNicolas Pitreconfig SECCOMP 173870c70d97SNicolas Pitre bool 173970c70d97SNicolas Pitre prompt "Enable seccomp to safely compute untrusted bytecode" 174070c70d97SNicolas Pitre ---help--- 174170c70d97SNicolas Pitre This kernel feature is useful for number crunching applications 174270c70d97SNicolas Pitre that may need to compute untrusted bytecode during their 174370c70d97SNicolas Pitre execution. By using pipes or other transports made available to 174470c70d97SNicolas Pitre the process as file descriptors supporting the read/write 174570c70d97SNicolas Pitre syscalls, it's possible to isolate those applications in 174670c70d97SNicolas Pitre their own address space using seccomp. Once seccomp is 174770c70d97SNicolas Pitre enabled via prctl(PR_SET_SECCOMP), it cannot be disabled 174870c70d97SNicolas Pitre and the task is only allowed to execute a few safe syscalls 174970c70d97SNicolas Pitre defined by each seccomp mode. 175070c70d97SNicolas Pitre 175106e6295bSStefano Stabelliniconfig SWIOTLB 175206e6295bSStefano Stabellini def_bool y 175306e6295bSStefano Stabellini 175406e6295bSStefano Stabelliniconfig IOMMU_HELPER 175506e6295bSStefano Stabellini def_bool SWIOTLB 175606e6295bSStefano Stabellini 1757eff8d644SStefano Stabelliniconfig XEN_DOM0 1758eff8d644SStefano Stabellini def_bool y 1759eff8d644SStefano Stabellini depends on XEN 1760eff8d644SStefano Stabellini 1761eff8d644SStefano Stabelliniconfig XEN 1762eff8d644SStefano Stabellini bool "Xen guest support on ARM (EXPERIMENTAL)" 176385323a99SIan Campbell depends on ARM && AEABI && OF 1764f880b67dSArnd Bergmann depends on CPU_V7 && !CPU_V6 176585323a99SIan Campbell depends on !GENERIC_ATOMIC64 17667693deccSUwe Kleine-König depends on MMU 176751aaf81fSRussell King select ARCH_DMA_ADDR_T_64BIT 176817b7ab80SStefano Stabellini select ARM_PSCI 176983862ccfSStefano Stabellini select SWIOTLB_XEN 1770eff8d644SStefano Stabellini help 1771eff8d644SStefano Stabellini Say Y if you want to run Linux in a Virtual Machine on Xen on ARM. 1772eff8d644SStefano Stabellini 17731da177e4SLinus Torvaldsendmenu 17741da177e4SLinus Torvalds 17751da177e4SLinus Torvaldsmenu "Boot options" 17761da177e4SLinus Torvalds 17779eb8f674SGrant Likelyconfig USE_OF 17789eb8f674SGrant Likely bool "Flattened Device Tree support" 1779b1b3f49cSRussell King select IRQ_DOMAIN 17809eb8f674SGrant Likely select OF 17819eb8f674SGrant Likely select OF_EARLY_FLATTREE 1782bcedb5f9SMarek Szyprowski select OF_RESERVED_MEM 17839eb8f674SGrant Likely help 17849eb8f674SGrant Likely Include support for flattened device tree machine descriptions. 17859eb8f674SGrant Likely 1786bd51e2f5SNicolas Pitreconfig ATAGS 1787bd51e2f5SNicolas Pitre bool "Support for the traditional ATAGS boot data passing" if USE_OF 1788bd51e2f5SNicolas Pitre default y 1789bd51e2f5SNicolas Pitre help 1790bd51e2f5SNicolas Pitre This is the traditional way of passing data to the kernel at boot 1791bd51e2f5SNicolas Pitre time. If you are solely relying on the flattened device tree (or 1792bd51e2f5SNicolas Pitre the ARM_ATAG_DTB_COMPAT option) then you may unselect this option 1793bd51e2f5SNicolas Pitre to remove ATAGS support from your kernel binary. If unsure, 1794bd51e2f5SNicolas Pitre leave this to y. 1795bd51e2f5SNicolas Pitre 1796bd51e2f5SNicolas Pitreconfig DEPRECATED_PARAM_STRUCT 1797bd51e2f5SNicolas Pitre bool "Provide old way to pass kernel parameters" 1798bd51e2f5SNicolas Pitre depends on ATAGS 1799bd51e2f5SNicolas Pitre help 1800bd51e2f5SNicolas Pitre This was deprecated in 2001 and announced to live on for 5 years. 1801bd51e2f5SNicolas Pitre Some old boot loaders still use this way. 1802bd51e2f5SNicolas Pitre 18031da177e4SLinus Torvalds# Compressed boot loader in ROM. Yes, we really want to ask about 18041da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files. 18051da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT 18061da177e4SLinus Torvalds hex "Compressed ROM boot loader base address" 18071da177e4SLinus Torvalds default "0" 18081da177e4SLinus Torvalds help 18091da177e4SLinus Torvalds The physical address at which the ROM-able zImage is to be 18101da177e4SLinus Torvalds placed in the target. Platforms which normally make use of 18111da177e4SLinus Torvalds ROM-able zImage formats normally set this to a suitable 18121da177e4SLinus Torvalds value in their defconfig file. 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 18151da177e4SLinus Torvalds 18161da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS 18171da177e4SLinus Torvalds hex "Compressed ROM boot loader BSS address" 18181da177e4SLinus Torvalds default "0" 18191da177e4SLinus Torvalds help 1820f8c440b2SDan Fandrich The base address of an area of read/write memory in the target 1821f8c440b2SDan Fandrich for the ROM-able zImage which must be available while the 1822f8c440b2SDan Fandrich decompressor is running. It must be large enough to hold the 1823f8c440b2SDan Fandrich entire decompressed kernel plus an additional 128 KiB. 1824f8c440b2SDan Fandrich Platforms which normally make use of ROM-able zImage formats 1825f8c440b2SDan Fandrich normally set this to a suitable value in their defconfig file. 18261da177e4SLinus Torvalds 18271da177e4SLinus Torvalds If ZBOOT_ROM is not enabled, this has no effect. 18281da177e4SLinus Torvalds 18291da177e4SLinus Torvaldsconfig ZBOOT_ROM 18301da177e4SLinus Torvalds bool "Compressed boot loader in ROM/flash" 18311da177e4SLinus Torvalds depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS 183210968131SRussell King depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR 18331da177e4SLinus Torvalds help 18341da177e4SLinus Torvalds Say Y here if you intend to execute your compressed kernel image 18351da177e4SLinus Torvalds (zImage) directly from ROM or flash. If unsure, say N. 18361da177e4SLinus Torvalds 1837090ab3ffSSimon Hormanchoice 1838090ab3ffSSimon Horman prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)" 1839d6f94fa0SKees Cook depends on ZBOOT_ROM && ARCH_SH7372 1840090ab3ffSSimon Horman default ZBOOT_ROM_NONE 1841090ab3ffSSimon Horman help 1842090ab3ffSSimon Horman Include experimental SD/MMC loading code in the ROM-able zImage. 184359bf8964SMasanari Iida With this enabled it is possible to write the ROM-able zImage 1844090ab3ffSSimon Horman kernel image to an MMC or SD card and boot the kernel straight 1845090ab3ffSSimon Horman from the reset vector. At reset the processor Mask ROM will load 184659bf8964SMasanari Iida the first part of the ROM-able zImage which in turn loads the 1847090ab3ffSSimon Horman rest the kernel image to RAM. 1848090ab3ffSSimon Horman 1849090ab3ffSSimon Hormanconfig ZBOOT_ROM_NONE 1850090ab3ffSSimon Horman bool "No SD/MMC loader in zImage (EXPERIMENTAL)" 1851090ab3ffSSimon Horman help 1852090ab3ffSSimon Horman Do not load image from SD or MMC 1853090ab3ffSSimon Horman 1854f45b1149SSimon Hormanconfig ZBOOT_ROM_MMCIF 1855f45b1149SSimon Horman bool "Include MMCIF loader in zImage (EXPERIMENTAL)" 1856f45b1149SSimon Horman help 1857090ab3ffSSimon Horman Load image from MMCIF hardware block. 1858090ab3ffSSimon Horman 1859090ab3ffSSimon Hormanconfig ZBOOT_ROM_SH_MOBILE_SDHI 1860090ab3ffSSimon Horman bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)" 1861090ab3ffSSimon Horman help 1862090ab3ffSSimon Horman Load image from SDHI hardware block 1863090ab3ffSSimon Horman 1864090ab3ffSSimon Hormanendchoice 1865f45b1149SSimon Horman 1866e2a6a3aaSJohn Bonesioconfig ARM_APPENDED_DTB 1867e2a6a3aaSJohn Bonesio bool "Use appended device tree blob to zImage (EXPERIMENTAL)" 186810968131SRussell King depends on OF 1869e2a6a3aaSJohn Bonesio help 1870e2a6a3aaSJohn Bonesio With this option, the boot code will look for a device tree binary 1871e2a6a3aaSJohn Bonesio (DTB) appended to zImage 1872e2a6a3aaSJohn Bonesio (e.g. cat zImage <filename>.dtb > zImage_w_dtb). 1873e2a6a3aaSJohn Bonesio 1874e2a6a3aaSJohn Bonesio This is meant as a backward compatibility convenience for those 1875e2a6a3aaSJohn Bonesio systems with a bootloader that can't be upgraded to accommodate 1876e2a6a3aaSJohn Bonesio the documented boot protocol using a device tree. 1877e2a6a3aaSJohn Bonesio 1878e2a6a3aaSJohn Bonesio Beware that there is very little in terms of protection against 1879e2a6a3aaSJohn Bonesio this option being confused by leftover garbage in memory that might 1880e2a6a3aaSJohn Bonesio look like a DTB header after a reboot if no actual DTB is appended 1881e2a6a3aaSJohn Bonesio to zImage. Do not leave this option active in a production kernel 1882e2a6a3aaSJohn Bonesio if you don't intend to always append a DTB. Proper passing of the 1883e2a6a3aaSJohn Bonesio location into r2 of a bootloader provided DTB is always preferable 1884e2a6a3aaSJohn Bonesio to this option. 1885e2a6a3aaSJohn Bonesio 1886b90b9a38SNicolas Pitreconfig ARM_ATAG_DTB_COMPAT 1887b90b9a38SNicolas Pitre bool "Supplement the appended DTB with traditional ATAG information" 1888b90b9a38SNicolas Pitre depends on ARM_APPENDED_DTB 1889b90b9a38SNicolas Pitre help 1890b90b9a38SNicolas Pitre Some old bootloaders can't be updated to a DTB capable one, yet 1891b90b9a38SNicolas Pitre they provide ATAGs with memory configuration, the ramdisk address, 1892b90b9a38SNicolas Pitre the kernel cmdline string, etc. Such information is dynamically 1893b90b9a38SNicolas Pitre provided by the bootloader and can't always be stored in a static 1894b90b9a38SNicolas Pitre DTB. To allow a device tree enabled kernel to be used with such 1895b90b9a38SNicolas Pitre bootloaders, this option allows zImage to extract the information 1896b90b9a38SNicolas Pitre from the ATAG list and store it at run time into the appended DTB. 1897b90b9a38SNicolas Pitre 1898d0f34a11SGenoud Richardchoice 1899d0f34a11SGenoud Richard prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT 1900d0f34a11SGenoud Richard default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER 1901d0f34a11SGenoud Richard 1902d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER 1903d0f34a11SGenoud Richard bool "Use bootloader kernel arguments if available" 1904d0f34a11SGenoud Richard help 1905d0f34a11SGenoud Richard Uses the command-line options passed by the boot loader instead of 1906d0f34a11SGenoud Richard the device tree bootargs property. If the boot loader doesn't provide 1907d0f34a11SGenoud Richard any, the device tree bootargs property will be used. 1908d0f34a11SGenoud Richard 1909d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND 1910d0f34a11SGenoud Richard bool "Extend with bootloader kernel arguments" 1911d0f34a11SGenoud Richard help 1912d0f34a11SGenoud Richard The command-line arguments provided by the boot loader will be 1913d0f34a11SGenoud Richard appended to the the device tree bootargs property. 1914d0f34a11SGenoud Richard 1915d0f34a11SGenoud Richardendchoice 1916d0f34a11SGenoud Richard 19171da177e4SLinus Torvaldsconfig CMDLINE 19181da177e4SLinus Torvalds string "Default kernel command string" 19191da177e4SLinus Torvalds default "" 19201da177e4SLinus Torvalds help 19211da177e4SLinus Torvalds On some architectures (EBSA110 and CATS), there is currently no way 19221da177e4SLinus Torvalds for the boot loader to pass arguments to the kernel. For these 19231da177e4SLinus Torvalds architectures, you should supply some command-line options at build 19241da177e4SLinus Torvalds time by entering them here. As a minimum, you should specify the 19251da177e4SLinus Torvalds memory size and the root device (e.g., mem=64M root=/dev/nfs). 19261da177e4SLinus Torvalds 19274394c124SVictor Boiviechoice 19284394c124SVictor Boivie prompt "Kernel command line type" if CMDLINE != "" 19294394c124SVictor Boivie default CMDLINE_FROM_BOOTLOADER 1930bd51e2f5SNicolas Pitre depends on ATAGS 19314394c124SVictor Boivie 19324394c124SVictor Boivieconfig CMDLINE_FROM_BOOTLOADER 19334394c124SVictor Boivie bool "Use bootloader kernel arguments if available" 19344394c124SVictor Boivie help 19354394c124SVictor Boivie Uses the command-line options passed by the boot loader. If 19364394c124SVictor Boivie the boot loader doesn't provide any, the default kernel command 19374394c124SVictor Boivie string provided in CMDLINE will be used. 19384394c124SVictor Boivie 19394394c124SVictor Boivieconfig CMDLINE_EXTEND 19404394c124SVictor Boivie bool "Extend bootloader kernel arguments" 19414394c124SVictor Boivie help 19424394c124SVictor Boivie The command-line arguments provided by the boot loader will be 19434394c124SVictor Boivie appended to the default kernel command string. 19444394c124SVictor Boivie 194592d2040dSAlexander Hollerconfig CMDLINE_FORCE 194692d2040dSAlexander Holler bool "Always use the default kernel command string" 194792d2040dSAlexander Holler help 194892d2040dSAlexander Holler Always use the default kernel command string, even if the boot 194992d2040dSAlexander Holler loader passes other arguments to the kernel. 195092d2040dSAlexander Holler This is useful if you cannot or don't want to change the 195192d2040dSAlexander Holler command-line options your boot loader passes to the kernel. 19524394c124SVictor Boivieendchoice 195392d2040dSAlexander Holler 19541da177e4SLinus Torvaldsconfig XIP_KERNEL 19551da177e4SLinus Torvalds bool "Kernel Execute-In-Place from ROM" 195610968131SRussell King depends on !ARM_LPAE && !ARCH_MULTIPLATFORM 19571da177e4SLinus Torvalds help 19581da177e4SLinus Torvalds Execute-In-Place allows the kernel to run from non-volatile storage 19591da177e4SLinus Torvalds directly addressable by the CPU, such as NOR flash. This saves RAM 19601da177e4SLinus Torvalds space since the text section of the kernel is not loaded from flash 19611da177e4SLinus Torvalds to RAM. Read-write sections, such as the data section and stack, 19621da177e4SLinus Torvalds are still copied to RAM. The XIP kernel is not compressed since 19631da177e4SLinus Torvalds it has to run directly from flash, so it will take more space to 19641da177e4SLinus Torvalds store it. The flash address used to link the kernel object files, 19651da177e4SLinus Torvalds and for storing it, is configuration dependent. Therefore, if you 19661da177e4SLinus Torvalds say Y here, you must know the proper physical address where to 19671da177e4SLinus Torvalds store the kernel image depending on your own flash memory usage. 19681da177e4SLinus Torvalds 19691da177e4SLinus Torvalds Also note that the make target becomes "make xipImage" rather than 19701da177e4SLinus Torvalds "make zImage" or "make Image". The final kernel binary to put in 19711da177e4SLinus Torvalds ROM memory will be arch/arm/boot/xipImage. 19721da177e4SLinus Torvalds 19731da177e4SLinus Torvalds If unsure, say N. 19741da177e4SLinus Torvalds 19751da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR 19761da177e4SLinus Torvalds hex "XIP Kernel Physical Location" 19771da177e4SLinus Torvalds depends on XIP_KERNEL 19781da177e4SLinus Torvalds default "0x00080000" 19791da177e4SLinus Torvalds help 19801da177e4SLinus Torvalds This is the physical address in your flash memory the kernel will 19811da177e4SLinus Torvalds be linked for and stored to. This address is dependent on your 19821da177e4SLinus Torvalds own flash usage. 19831da177e4SLinus Torvalds 1984c587e4a6SRichard Purdieconfig KEXEC 1985c587e4a6SRichard Purdie bool "Kexec system call (EXPERIMENTAL)" 198619ab428fSStephen Warren depends on (!SMP || PM_SLEEP_SMP) 198712db5562SVivek Goyal select CRYPTO 198812db5562SVivek Goyal select CRYPTO_SHA256 1989c587e4a6SRichard Purdie help 1990c587e4a6SRichard Purdie kexec is a system call that implements the ability to shutdown your 1991c587e4a6SRichard Purdie current kernel, and to start another kernel. It is like a reboot 199201dd2fbfSMatt LaPlante but it is independent of the system firmware. And like a reboot 1993c587e4a6SRichard Purdie you can start any kernel with it, not just Linux. 1994c587e4a6SRichard Purdie 1995c587e4a6SRichard Purdie It is an ongoing process to be certain the hardware in a machine 1996c587e4a6SRichard Purdie is properly shutdown, so do not be surprised if this code does not 1997bf220695SGeert Uytterhoeven initially work for you. 1998c587e4a6SRichard Purdie 19994cd9d6f7SRichard Purdieconfig ATAGS_PROC 20004cd9d6f7SRichard Purdie bool "Export atags in procfs" 2001bd51e2f5SNicolas Pitre depends on ATAGS && KEXEC 2002b98d7291SUli Luckas default y 20034cd9d6f7SRichard Purdie help 20044cd9d6f7SRichard Purdie Should the atags used to boot the kernel be exported in an "atags" 20054cd9d6f7SRichard Purdie file in procfs. Useful with kexec. 20064cd9d6f7SRichard Purdie 2007cb5d39b3SMika Westerbergconfig CRASH_DUMP 2008cb5d39b3SMika Westerberg bool "Build kdump crash kernel (EXPERIMENTAL)" 2009cb5d39b3SMika Westerberg help 2010cb5d39b3SMika Westerberg Generate crash dump after being started by kexec. This should 2011cb5d39b3SMika Westerberg be normally only set in special crash dump kernels which are 2012cb5d39b3SMika Westerberg loaded in the main kernel with kexec-tools into a specially 2013cb5d39b3SMika Westerberg reserved region and then later executed after a crash by 2014cb5d39b3SMika Westerberg kdump/kexec. The crash dump kernel must be compiled to a 2015cb5d39b3SMika Westerberg memory address not used by the main kernel 2016cb5d39b3SMika Westerberg 2017cb5d39b3SMika Westerberg For more details see Documentation/kdump/kdump.txt 2018cb5d39b3SMika Westerberg 2019e69edc79SEric Miaoconfig AUTO_ZRELADDR 2020e69edc79SEric Miao bool "Auto calculation of the decompressed kernel image address" 2021e69edc79SEric Miao help 2022e69edc79SEric Miao ZRELADDR is the physical address where the decompressed kernel 2023e69edc79SEric Miao image will be placed. If AUTO_ZRELADDR is selected, the address 2024e69edc79SEric Miao will be determined at run-time by masking the current IP with 2025e69edc79SEric Miao 0xf8000000. This assumes the zImage being placed in the first 128MB 2026e69edc79SEric Miao from start of memory. 2027e69edc79SEric Miao 20281da177e4SLinus Torvaldsendmenu 20291da177e4SLinus Torvalds 2030ac9d7efcSRussell Kingmenu "CPU Power Management" 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig" 20331da177e4SLinus Torvalds 2034ac9d7efcSRussell Kingsource "drivers/cpuidle/Kconfig" 2035ac9d7efcSRussell King 2036ac9d7efcSRussell Kingendmenu 2037ac9d7efcSRussell King 20381da177e4SLinus Torvaldsmenu "Floating point emulation" 20391da177e4SLinus Torvalds 20401da177e4SLinus Torvaldscomment "At least one emulation must be selected" 20411da177e4SLinus Torvalds 20421da177e4SLinus Torvaldsconfig FPE_NWFPE 20431da177e4SLinus Torvalds bool "NWFPE math emulation" 2044593c252aSDave Martin depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL 20451da177e4SLinus Torvalds ---help--- 20461da177e4SLinus Torvalds Say Y to include the NWFPE floating point emulator in the kernel. 20471da177e4SLinus Torvalds This is necessary to run most binaries. Linux does not currently 20481da177e4SLinus Torvalds support floating point hardware so you need to say Y here even if 20491da177e4SLinus Torvalds your machine has an FPA or floating point co-processor podule. 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds You may say N here if you are going to load the Acorn FPEmulator 20521da177e4SLinus Torvalds early in the bootup. 20531da177e4SLinus Torvalds 20541da177e4SLinus Torvaldsconfig FPE_NWFPE_XP 20551da177e4SLinus Torvalds bool "Support extended precision" 2056bedf142bSLennert Buytenhek depends on FPE_NWFPE 20571da177e4SLinus Torvalds help 20581da177e4SLinus Torvalds Say Y to include 80-bit support in the kernel floating-point 20591da177e4SLinus Torvalds emulator. Otherwise, only 32 and 64-bit support is compiled in. 20601da177e4SLinus Torvalds Note that gcc does not generate 80-bit operations by default, 20611da177e4SLinus Torvalds so in most cases this option only enlarges the size of the 20621da177e4SLinus Torvalds floating point emulator without any good reason. 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds You almost surely want to say N here. 20651da177e4SLinus Torvalds 20661da177e4SLinus Torvaldsconfig FPE_FASTFPE 20671da177e4SLinus Torvalds bool "FastFPE math emulation (EXPERIMENTAL)" 2068d6f94fa0SKees Cook depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 20691da177e4SLinus Torvalds ---help--- 20701da177e4SLinus Torvalds Say Y here to include the FAST floating point emulator in the kernel. 20711da177e4SLinus Torvalds This is an experimental much faster emulator which now also has full 20721da177e4SLinus Torvalds precision for the mantissa. It does not support any exceptions. 20731da177e4SLinus Torvalds It is very simple, and approximately 3-6 times faster than NWFPE. 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds It should be sufficient for most programs. It may be not suitable 20761da177e4SLinus Torvalds for scientific calculations, but you have to check this for yourself. 20771da177e4SLinus Torvalds If you do not feel you need a faster FP emulation you should better 20781da177e4SLinus Torvalds choose NWFPE. 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvaldsconfig VFP 20811da177e4SLinus Torvalds bool "VFP-format floating point maths" 2082e399b1a4SRussell King depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON 20831da177e4SLinus Torvalds help 20841da177e4SLinus Torvalds Say Y to include VFP support code in the kernel. This is needed 20851da177e4SLinus Torvalds if your hardware includes a VFP unit. 20861da177e4SLinus Torvalds 20871da177e4SLinus Torvalds Please see <file:Documentation/arm/VFP/release-notes.txt> for 20881da177e4SLinus Torvalds release notes and additional status information. 20891da177e4SLinus Torvalds 20901da177e4SLinus Torvalds Say N if your target does not have VFP hardware. 20911da177e4SLinus Torvalds 209225ebee02SCatalin Marinasconfig VFPv3 209325ebee02SCatalin Marinas bool 209425ebee02SCatalin Marinas depends on VFP 209525ebee02SCatalin Marinas default y if CPU_V7 209625ebee02SCatalin Marinas 2097b5872db4SCatalin Marinasconfig NEON 2098b5872db4SCatalin Marinas bool "Advanced SIMD (NEON) Extension support" 2099b5872db4SCatalin Marinas depends on VFPv3 && CPU_V7 2100b5872db4SCatalin Marinas help 2101b5872db4SCatalin Marinas Say Y to include support code for NEON, the ARMv7 Advanced SIMD 2102b5872db4SCatalin Marinas Extension. 2103b5872db4SCatalin Marinas 210473c132c1SArd Biesheuvelconfig KERNEL_MODE_NEON 210573c132c1SArd Biesheuvel bool "Support for NEON in kernel mode" 2106c4a30c3bSRussell King depends on NEON && AEABI 210773c132c1SArd Biesheuvel help 210873c132c1SArd Biesheuvel Say Y to include support for NEON in kernel mode. 210973c132c1SArd Biesheuvel 21101da177e4SLinus Torvaldsendmenu 21111da177e4SLinus Torvalds 21121da177e4SLinus Torvaldsmenu "Userspace binary formats" 21131da177e4SLinus Torvalds 21141da177e4SLinus Torvaldssource "fs/Kconfig.binfmt" 21151da177e4SLinus Torvalds 21161da177e4SLinus Torvaldsconfig ARTHUR 21171da177e4SLinus Torvalds tristate "RISC OS personality" 2118704bdda0SNicolas Pitre depends on !AEABI 21191da177e4SLinus Torvalds help 21201da177e4SLinus Torvalds Say Y here to include the kernel code necessary if you want to run 21211da177e4SLinus Torvalds Acorn RISC OS/Arthur binaries under Linux. This code is still very 21221da177e4SLinus Torvalds experimental; if this sounds frightening, say N and sleep in peace. 21231da177e4SLinus Torvalds You can also say M here to compile this support as a module (which 21241da177e4SLinus Torvalds will be called arthur). 21251da177e4SLinus Torvalds 21261da177e4SLinus Torvaldsendmenu 21271da177e4SLinus Torvalds 21281da177e4SLinus Torvaldsmenu "Power management options" 21291da177e4SLinus Torvalds 2130eceab4acSRussell Kingsource "kernel/power/Kconfig" 21311da177e4SLinus Torvalds 2132f4cb5700SJohannes Bergconfig ARCH_SUSPEND_POSSIBLE 213319a0519dSEzequiel Garcia depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \ 2134f0d75153SUwe Kleine-König CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK 2135f4cb5700SJohannes Berg def_bool y 2136f4cb5700SJohannes Berg 213715e0d9e3SArnd Bergmannconfig ARM_CPU_SUSPEND 213815e0d9e3SArnd Bergmann def_bool PM_SLEEP 213915e0d9e3SArnd Bergmann 2140603fb42aSSebastian Capellaconfig ARCH_HIBERNATION_POSSIBLE 2141603fb42aSSebastian Capella bool 2142603fb42aSSebastian Capella depends on MMU 2143603fb42aSSebastian Capella default y if ARCH_SUSPEND_POSSIBLE 2144603fb42aSSebastian Capella 21451da177e4SLinus Torvaldsendmenu 21461da177e4SLinus Torvalds 2147d5950b43SSam Ravnborgsource "net/Kconfig" 2148d5950b43SSam Ravnborg 2149ac25150fSUwe Kleine-Königsource "drivers/Kconfig" 21501da177e4SLinus Torvalds 21511da177e4SLinus Torvaldssource "fs/Kconfig" 21521da177e4SLinus Torvalds 21531da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug" 21541da177e4SLinus Torvalds 21551da177e4SLinus Torvaldssource "security/Kconfig" 21561da177e4SLinus Torvalds 21571da177e4SLinus Torvaldssource "crypto/Kconfig" 21581da177e4SLinus Torvalds 21591da177e4SLinus Torvaldssource "lib/Kconfig" 2160749cf76cSChristoffer Dall 2161749cf76cSChristoffer Dallsource "arch/arm/kvm/Kconfig" 2162