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