1ec8f24b7SThomas Gleixner# SPDX-License-Identifier: GPL-2.0-only 21da177e4SLinus Torvalds# 31da177e4SLinus Torvalds# Library configuration 41da177e4SLinus Torvalds# 51da177e4SLinus Torvalds 64370aa4aSLai Jiangshanconfig BINARY_PRINTF 74370aa4aSLai Jiangshan def_bool n 84370aa4aSLai Jiangshan 91da177e4SLinus Torvaldsmenu "Library routines" 101da177e4SLinus Torvalds 11f5e70d0fSDavid Woodhouseconfig RAID6_PQ 12f5e70d0fSDavid Woodhouse tristate 13f5e70d0fSDavid Woodhouse 14be85f93aSDaniel Verkampconfig RAID6_PQ_BENCHMARK 15be85f93aSDaniel Verkamp bool "Automatically choose fastest RAID6 PQ functions" 16be85f93aSDaniel Verkamp depends on RAID6_PQ 17be85f93aSDaniel Verkamp default y 18be85f93aSDaniel Verkamp help 19be85f93aSDaniel Verkamp Benchmark all available RAID6 PQ functions on init and choose the 20be85f93aSDaniel Verkamp fastest one. 21be85f93aSDaniel Verkamp 22d2218d4eSMatti Vaittinenconfig LINEAR_RANGES 23d2218d4eSMatti Vaittinen tristate 24d2218d4eSMatti Vaittinen 25554aae35SVladimir Olteanconfig PACKING 26554aae35SVladimir Oltean bool "Generic bitfield packing and unpacking" 271280d4b7SUladzislau Koshchanka select BITREVERSE 28554aae35SVladimir Oltean default n 29554aae35SVladimir Oltean help 30554aae35SVladimir Oltean This option provides the packing() helper function, which permits 31554aae35SVladimir Oltean converting bitfields between a CPU-usable representation and a 32554aae35SVladimir Oltean memory representation that can have any combination of these quirks: 33554aae35SVladimir Oltean - Is little endian (bytes are reversed within a 32-bit group) 34554aae35SVladimir Oltean - The least-significant 32-bit word comes first (within a 64-bit 35554aae35SVladimir Oltean group) 36554aae35SVladimir Oltean - The most significant bit of a byte is at its right (bit 0 of a 37554aae35SVladimir Oltean register description is numerically 2^7). 38554aae35SVladimir Oltean Drivers may use these helpers to match the bit indices as described 39554aae35SVladimir Oltean in the data sheets of the peripherals they are in control of. 40554aae35SVladimir Oltean 41554aae35SVladimir Oltean When in doubt, say N. 42554aae35SVladimir Oltean 43e9502ea6SJacob Kellerconfig PACKING_KUNIT_TEST 44e9502ea6SJacob Keller tristate "KUnit tests for packing library" if !KUNIT_ALL_TESTS 45e9502ea6SJacob Keller depends on PACKING && KUNIT 46e9502ea6SJacob Keller default KUNIT_ALL_TESTS 47e9502ea6SJacob Keller help 48e9502ea6SJacob Keller This builds KUnit tests for the packing library. 49e9502ea6SJacob Keller 50e9502ea6SJacob Keller For more information on KUnit and unit tests in general, 51e9502ea6SJacob Keller please refer to the KUnit documentation in Documentation/dev-tools/kunit/. 52e9502ea6SJacob Keller 53e9502ea6SJacob Keller When in doubt, say N. 54e9502ea6SJacob Keller 55a5cfc1ecSAkinobu Mitaconfig BITREVERSE 56a5cfc1ecSAkinobu Mita tristate 57a5cfc1ecSAkinobu Mita 58556d2f05SYalin Wangconfig HAVE_ARCH_BITREVERSE 59841c0090SChristoph Jaeger bool 60556d2f05SYalin Wang default n 61556d2f05SYalin Wang help 629e522c0dSAndrew Morton This option enables the use of hardware bit-reversal instructions on 639e522c0dSAndrew Morton architectures which support such operations. 64556d2f05SYalin Wang 65e6226997SArnd Bergmannconfig ARCH_HAS_STRNCPY_FROM_USER 662922585bSDavid S. Miller bool 672922585bSDavid S. Miller 68e6226997SArnd Bergmannconfig ARCH_HAS_STRNLEN_USER 69a08c5356SLinus Torvalds bool 70a08c5356SLinus Torvalds 71e6226997SArnd Bergmannconfig GENERIC_STRNCPY_FROM_USER 72e6226997SArnd Bergmann def_bool !ARCH_HAS_STRNCPY_FROM_USER 73e6226997SArnd Bergmann 74e6226997SArnd Bergmannconfig GENERIC_STRNLEN_USER 75e6226997SArnd Bergmann def_bool !ARCH_HAS_STRNLEN_USER 76e6226997SArnd Bergmann 774cd5773aSAndy Shevchenkoconfig GENERIC_NET_UTILS 784cd5773aSAndy Shevchenko bool 794cd5773aSAndy Shevchenko 802c64e9cbSAndy Shevchenkosource "lib/math/Kconfig" 812c64e9cbSAndy Shevchenko 82b923650bSMichael S. Tsirkinconfig NO_GENERIC_PCI_IOPORT_MAP 83b923650bSMichael S. Tsirkin bool 84b923650bSMichael S. Tsirkin 854673ca8eSMichael S. Tsirkinconfig GENERIC_IOMAP 864673ca8eSMichael S. Tsirkin bool 8766eab4dfSMichael S. Tsirkin select GENERIC_PCI_IOMAP 884673ca8eSMichael S. Tsirkin 894ccf4beaSWolfram Sangconfig STMP_DEVICE 904ccf4beaSWolfram Sang bool 914ccf4beaSWolfram Sang 92bc08b449SLinus Torvaldsconfig ARCH_USE_CMPXCHG_LOCKREF 93bc08b449SLinus Torvalds bool 94bc08b449SLinus Torvalds 9572d93104SLinus Torvaldsconfig ARCH_HAS_FAST_MULTIPLIER 9672d93104SLinus Torvalds bool 9772d93104SLinus Torvalds 982ce0d7f9SMark Brownconfig ARCH_USE_SYM_ANNOTATIONS 992ce0d7f9SMark Brown bool 1002ce0d7f9SMark Brown 101031e3601SZhichang Yuanconfig INDIRECT_PIO 102031e3601SZhichang Yuan bool "Access I/O in non-MMIO mode" 103031e3601SZhichang Yuan depends on ARM64 104fcbfe812SNiklas Schnelle depends on HAS_IOPORT 105031e3601SZhichang Yuan help 106031e3601SZhichang Yuan On some platforms where no separate I/O space exists, there are I/O 107031e3601SZhichang Yuan hosts which can not be accessed in MMIO mode. Using the logical PIO 108031e3601SZhichang Yuan mechanism, the host-local I/O resource can be mapped into system 109031e3601SZhichang Yuan logic PIO space shared with MMIO hosts, such as PCI/PCIe, then the 110031e3601SZhichang Yuan system can access the I/O devices with the mapped-logic PIO through 111031e3601SZhichang Yuan I/O accessors. 112031e3601SZhichang Yuan 113031e3601SZhichang Yuan This way has relatively little I/O performance cost. Please make 114031e3601SZhichang Yuan sure your devices really need this configure item enabled. 115031e3601SZhichang Yuan 116031e3601SZhichang Yuan When in doubt, say N. 117031e3601SZhichang Yuan 118ca2e3342SJohannes Bergconfig INDIRECT_IOMEM 119ca2e3342SJohannes Berg bool 120ca2e3342SJohannes Berg help 121ca2e3342SJohannes Berg This is selected by other options/architectures to provide the 122ca2e3342SJohannes Berg emulated iomem accessors. 123ca2e3342SJohannes Berg 124ca2e3342SJohannes Bergconfig INDIRECT_IOMEM_FALLBACK 125ca2e3342SJohannes Berg bool 126ca2e3342SJohannes Berg depends on INDIRECT_IOMEM 127ca2e3342SJohannes Berg help 128ca2e3342SJohannes Berg If INDIRECT_IOMEM is selected, this enables falling back to plain 129ca2e3342SJohannes Berg mmio accesses when the IO memory address is not a registered 130ca2e3342SJohannes Berg emulated region. 131ca2e3342SJohannes Berg 132d593d64fSPrasad Sodagudiconfig TRACE_MMIO_ACCESS 133d593d64fSPrasad Sodagudi bool "Register read/write tracing" 134d593d64fSPrasad Sodagudi depends on TRACING && ARCH_HAVE_TRACE_MMIO_ACCESS 135d593d64fSPrasad Sodagudi help 136d593d64fSPrasad Sodagudi Create tracepoints for MMIO read/write operations. These trace events 137d593d64fSPrasad Sodagudi can be used for logging all MMIO read/write operations. 138d593d64fSPrasad Sodagudi 139e56e1898SJustin M. Forbessource "lib/crypto/Kconfig" 140e56e1898SJustin M. Forbes 1411da177e4SLinus Torvaldsconfig CRC_CCITT 1427939da26SEric Biggers tristate 1431da177e4SLinus Torvalds 1447657ec1fSEvgeniy Polyakovconfig CRC16 1452038af8eSEric Biggers tristate 1467657ec1fSEvgeniy Polyakov 147f11f594eSMartin K. Petersenconfig CRC_T10DIF 148*a6d0dbbaSEric Biggers tristate 149f11f594eSMartin K. Petersen 1500961c3bcSEric Biggersconfig ARCH_HAS_CRC_T10DIF 1510961c3bcSEric Biggers bool 1520961c3bcSEric Biggers 1530961c3bcSEric Biggersconfig CRC_T10DIF_ARCH 1540961c3bcSEric Biggers tristate 155b0430f39SEric Biggers default CRC_T10DIF if ARCH_HAS_CRC_T10DIF && CRC_OPTIMIZATIONS 1560961c3bcSEric Biggers 1573e7cbae7SIvo van Doornconfig CRC_ITU_T 1583e7cbae7SIvo van Doorn tristate "CRC ITU-T V.41 functions" 1593e7cbae7SIvo van Doorn help 1603e7cbae7SIvo van Doorn This option is provided for the case where no in-kernel-tree 1613e7cbae7SIvo van Doorn modules require CRC ITU-T V.41 functions, but a module built outside 1623e7cbae7SIvo van Doorn the kernel tree does. Such modules that use library CRC ITU-T V.41 1633e7cbae7SIvo van Doorn functions require M here. 1643e7cbae7SIvo van Doorn 1651da177e4SLinus Torvaldsconfig CRC32 1669ad19171SEric Biggers tristate 167906d66dfSAkinobu Mita select BITREVERSE 1681da177e4SLinus Torvalds 169d36cebe0SEric Biggersconfig ARCH_HAS_CRC32 170d36cebe0SEric Biggers bool 171d36cebe0SEric Biggers 172d36cebe0SEric Biggersconfig CRC32_ARCH 173d36cebe0SEric Biggers tristate 174b0430f39SEric Biggers default CRC32 if ARCH_HAS_CRC32 && CRC_OPTIMIZATIONS 175d36cebe0SEric Biggers 176feba04fdSColy Liconfig CRC64 177981b39dcSEric Biggers tristate 178feba04fdSColy Li 179067bc871SEric Biggersconfig ARCH_HAS_CRC64 180067bc871SEric Biggers bool 181067bc871SEric Biggers 182067bc871SEric Biggersconfig CRC64_ARCH 183067bc871SEric Biggers tristate 184067bc871SEric Biggers default CRC64 if ARCH_HAS_CRC64 && CRC_OPTIMIZATIONS 185067bc871SEric Biggers 1860cbaa448SJeremy Kerrconfig CRC4 1877f36255fSEric Biggers tristate 1880cbaa448SJeremy Kerr 189ad241528SJan Nikitenkoconfig CRC7 190f5a40fcfSEric Biggers tristate 191ad241528SJan Nikitenko 1921da177e4SLinus Torvaldsconfig LIBCRC32C 193dce214dbSEric Biggers tristate 19438a9a512SEric Biggers select CRC32 1951da177e4SLinus Torvalds help 19638a9a512SEric Biggers This option just selects CRC32 and is provided for compatibility 19738a9a512SEric Biggers purposes until the users are updated to select CRC32 directly. 1981da177e4SLinus Torvalds 1997150962dSArend van Sprielconfig CRC8 200aa09b322SEric Biggers tristate 2017150962dSArend van Spriel 202b0430f39SEric Biggersconfig CRC_OPTIMIZATIONS 203b0430f39SEric Biggers bool "Enable optimized CRC implementations" if EXPERT 204b0430f39SEric Biggers default y 205b0430f39SEric Biggers help 206b0430f39SEric Biggers Disabling this option reduces code size slightly by disabling the 207b0430f39SEric Biggers architecture-optimized implementations of any CRC variants that are 208b0430f39SEric Biggers enabled. CRC checksumming performance may get much slower. 209b0430f39SEric Biggers 210b0430f39SEric Biggers Keep this enabled unless you're really trying to minimize the size of 211b0430f39SEric Biggers the kernel. 212b0430f39SEric Biggers 2135d240522SNick Terrellconfig XXHASH 2145d240522SNick Terrell tristate 2155d240522SNick Terrell 216e65e1fc2SAl Viroconfig AUDIT_GENERIC 217e65e1fc2SAl Viro bool 218e65e1fc2SAl Viro depends on AUDIT && !AUDIT_ARCH 219e65e1fc2SAl Viro default y 220e65e1fc2SAl Viro 2214b588411SAKASHI Takahiroconfig AUDIT_ARCH_COMPAT_GENERIC 2224b588411SAKASHI Takahiro bool 2234b588411SAKASHI Takahiro default n 2244b588411SAKASHI Takahiro 2254b588411SAKASHI Takahiroconfig AUDIT_COMPAT_GENERIC 2264b588411SAKASHI Takahiro bool 2274b588411SAKASHI Takahiro depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT 2284b588411SAKASHI Takahiro default y 2294b588411SAKASHI Takahiro 230a6a9c0f1SDaniel Borkmannconfig RANDOM32_SELFTEST 231a6a9c0f1SDaniel Borkmann bool "PRNG perform self test on init" 232a6a9c0f1SDaniel Borkmann help 233a6a9c0f1SDaniel Borkmann This option enables the 32 bit PRNG library functions to perform a 234a6a9c0f1SDaniel Borkmann self test on initialization. 235a6a9c0f1SDaniel Borkmann 2361da177e4SLinus Torvalds# 2371da177e4SLinus Torvalds# compression support is select'ed if needed 2381da177e4SLinus Torvalds# 2392da572c9SDan Streetmanconfig 842_COMPRESS 2405b571677SArnd Bergmann select CRC32 2412da572c9SDan Streetman tristate 2422da572c9SDan Streetman 2432da572c9SDan Streetmanconfig 842_DECOMPRESS 2445b571677SArnd Bergmann select CRC32 2452da572c9SDan Streetman tristate 2462da572c9SDan Streetman 2471da177e4SLinus Torvaldsconfig ZLIB_INFLATE 2481da177e4SLinus Torvalds tristate 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvaldsconfig ZLIB_DEFLATE 2511da177e4SLinus Torvalds tristate 2521fd4e5c3SAndrew Morton select BITREVERSE 2531da177e4SLinus Torvalds 254aa5b395bSMikhail Zaslonkoconfig ZLIB_DFLTCC 255aa5b395bSMikhail Zaslonko def_bool y 256aa5b395bSMikhail Zaslonko depends on S390 257aa5b395bSMikhail Zaslonko prompt "Enable s390x DEFLATE CONVERSION CALL support for kernel zlib" 258aa5b395bSMikhail Zaslonko help 259aa5b395bSMikhail Zaslonko Enable s390x hardware support for zlib in the kernel. 260aa5b395bSMikhail Zaslonko 26164c70b1cSRichard Purdieconfig LZO_COMPRESS 26264c70b1cSRichard Purdie tristate 26364c70b1cSRichard Purdie 26464c70b1cSRichard Purdieconfig LZO_DECOMPRESS 26564c70b1cSRichard Purdie tristate 26664c70b1cSRichard Purdie 267c72ac7a1SChanho Minconfig LZ4_COMPRESS 268c72ac7a1SChanho Min tristate 269c72ac7a1SChanho Min 270c72ac7a1SChanho Minconfig LZ4HC_COMPRESS 271c72ac7a1SChanho Min tristate 272c72ac7a1SChanho Min 273e76e1fdfSKyungsik Leeconfig LZ4_DECOMPRESS 274e76e1fdfSKyungsik Lee tristate 275e76e1fdfSKyungsik Lee 276637a642fSAlexey Kardashevskiyconfig ZSTD_COMMON 27773f3d1b4SNick Terrell select XXHASH 27873f3d1b4SNick Terrell tristate 27973f3d1b4SNick Terrell 280637a642fSAlexey Kardashevskiyconfig ZSTD_COMPRESS 281637a642fSAlexey Kardashevskiy select ZSTD_COMMON 282637a642fSAlexey Kardashevskiy tristate 283637a642fSAlexey Kardashevskiy 28473f3d1b4SNick Terrellconfig ZSTD_DECOMPRESS 285637a642fSAlexey Kardashevskiy select ZSTD_COMMON 28673f3d1b4SNick Terrell tristate 28773f3d1b4SNick Terrell 28824fa0402SLasse Collinsource "lib/xz/Kconfig" 28924fa0402SLasse Collin 2901da177e4SLinus Torvalds# 291c8531ab3SH. Peter Anvin# These all provide a common interface (hence the apparent duplication with 292c8531ab3SH. Peter Anvin# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) 293c8531ab3SH. Peter Anvin# 294c8531ab3SH. Peter Anvinconfig DECOMPRESS_GZIP 2957856a16eSH. Peter Anvin select ZLIB_INFLATE 296c8531ab3SH. Peter Anvin tristate 297c8531ab3SH. Peter Anvin 298c8531ab3SH. Peter Anvinconfig DECOMPRESS_BZIP2 299c8531ab3SH. Peter Anvin tristate 300c8531ab3SH. Peter Anvin 301c8531ab3SH. Peter Anvinconfig DECOMPRESS_LZMA 302c8531ab3SH. Peter Anvin tristate 303c8531ab3SH. Peter Anvin 3043ebe1243SLasse Collinconfig DECOMPRESS_XZ 3053ebe1243SLasse Collin select XZ_DEC 3063ebe1243SLasse Collin tristate 3073ebe1243SLasse Collin 308cacb246fSAlbin Tonnerreconfig DECOMPRESS_LZO 309cacb246fSAlbin Tonnerre select LZO_DECOMPRESS 310cacb246fSAlbin Tonnerre tristate 311cacb246fSAlbin Tonnerre 312e76e1fdfSKyungsik Leeconfig DECOMPRESS_LZ4 313e76e1fdfSKyungsik Lee select LZ4_DECOMPRESS 314e76e1fdfSKyungsik Lee tristate 315e76e1fdfSKyungsik Lee 3164963bb2bSNick Terrellconfig DECOMPRESS_ZSTD 3174963bb2bSNick Terrell select ZSTD_DECOMPRESS 3184963bb2bSNick Terrell tristate 3194963bb2bSNick Terrell 320c8531ab3SH. Peter Anvin# 321f14f75b8SJes Sorensen# Generic allocator support is selected if needed 322f14f75b8SJes Sorensen# 323f14f75b8SJes Sorensenconfig GENERIC_ALLOCATOR 3246341e62bSChristoph Jaeger bool 325f14f75b8SJes Sorensen 326f14f75b8SJes Sorensen# 3271da177e4SLinus Torvalds# reed solomon support is select'ed if needed 3281da177e4SLinus Torvalds# 3291da177e4SLinus Torvaldsconfig REED_SOLOMON 3301da177e4SLinus Torvalds tristate 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvaldsconfig REED_SOLOMON_ENC8 3336341e62bSChristoph Jaeger bool 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvaldsconfig REED_SOLOMON_DEC8 3366341e62bSChristoph Jaeger bool 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvaldsconfig REED_SOLOMON_ENC16 3396341e62bSChristoph Jaeger bool 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvaldsconfig REED_SOLOMON_DEC16 3426341e62bSChristoph Jaeger bool 3431da177e4SLinus Torvalds 344f7704347SDavid S. Miller# 345437aa565SIvan Djelic# BCH support is selected if needed 346437aa565SIvan Djelic# 347437aa565SIvan Djelicconfig BCH 348437aa565SIvan Djelic tristate 34902d7f74aSJohn Sanpe select BITREVERSE 350437aa565SIvan Djelic 351437aa565SIvan Djelicconfig BCH_CONST_PARAMS 3526341e62bSChristoph Jaeger bool 353437aa565SIvan Djelic help 354437aa565SIvan Djelic Drivers may select this option to force specific constant 355437aa565SIvan Djelic values for parameters 'm' (Galois field order) and 't' 356437aa565SIvan Djelic (error correction capability). Those specific values must 357437aa565SIvan Djelic be set by declaring default values for symbols BCH_CONST_M 358437aa565SIvan Djelic and BCH_CONST_T. 359437aa565SIvan Djelic Doing so will enable extra compiler optimizations, 360437aa565SIvan Djelic improving encoding and decoding performance up to 2x for 361437aa565SIvan Djelic usual (m,t) values (typically such that m*t < 200). 362437aa565SIvan Djelic When this option is selected, the BCH library supports 363437aa565SIvan Djelic only a single (m,t) configuration. This is mainly useful 364437aa565SIvan Djelic for NAND flash board drivers requiring known, fixed BCH 365437aa565SIvan Djelic parameters. 366437aa565SIvan Djelic 367437aa565SIvan Djelicconfig BCH_CONST_M 368437aa565SIvan Djelic int 369437aa565SIvan Djelic range 5 15 370437aa565SIvan Djelic help 371437aa565SIvan Djelic Constant value for Galois field order 'm'. If 'k' is the 372437aa565SIvan Djelic number of data bits to protect, 'm' should be chosen such 373437aa565SIvan Djelic that (k + m*t) <= 2**m - 1. 374437aa565SIvan Djelic Drivers should declare a default value for this symbol if 375437aa565SIvan Djelic they select option BCH_CONST_PARAMS. 376437aa565SIvan Djelic 377437aa565SIvan Djelicconfig BCH_CONST_T 378437aa565SIvan Djelic int 379437aa565SIvan Djelic help 380437aa565SIvan Djelic Constant value for error correction capability in bits 't'. 381437aa565SIvan Djelic Drivers should declare a default value for this symbol if 382437aa565SIvan Djelic they select option BCH_CONST_PARAMS. 383437aa565SIvan Djelic 384437aa565SIvan Djelic# 385f7704347SDavid S. Miller# Textsearch support is select'ed if needed 386f7704347SDavid S. Miller# 3872de4ff7bSThomas Grafconfig TEXTSEARCH 3886341e62bSChristoph Jaeger bool 3891da177e4SLinus Torvalds 390df3fb93aSThomas Grafconfig TEXTSEARCH_KMP 391f7704347SDavid S. Miller tristate 392df3fb93aSThomas Graf 3938082e4edSPablo Neira Ayusoconfig TEXTSEARCH_BM 39429cb9f9cSDavid S. Miller tristate 3958082e4edSPablo Neira Ayuso 3966408f79cSThomas Grafconfig TEXTSEARCH_FSM 397f7704347SDavid S. Miller tristate 3986408f79cSThomas Graf 3995db53f3eSJoern Engelconfig BTREE 4006341e62bSChristoph Jaeger bool 4015db53f3eSJoern Engel 402a88cc108SChris Wilsonconfig INTERVAL_TREE 4036341e62bSChristoph Jaeger bool 404a88cc108SChris Wilson help 405a88cc108SChris Wilson Simple, embeddable, interval-tree. Can find the start of an 406a88cc108SChris Wilson overlapping range in log(n) time and then iterate over all 407a88cc108SChris Wilson overlapping nodes. The algorithm is implemented as an 408a88cc108SChris Wilson augmented rbtree. 409a88cc108SChris Wilson 410a88cc108SChris Wilson See: 411a88cc108SChris Wilson 41214bbe3e3SMatthew Wilcox (Oracle) Documentation/core-api/rbtree.rst 413a88cc108SChris Wilson 414a88cc108SChris Wilson for more information. 415a88cc108SChris Wilson 4165fe93786SJason Gunthorpeconfig INTERVAL_TREE_SPAN_ITER 4175fe93786SJason Gunthorpe bool 4185fe93786SJason Gunthorpe depends on INTERVAL_TREE 4195fe93786SJason Gunthorpe 42002c02bf1SMatthew Wilcoxconfig XARRAY_MULTI 42157578c2eSMatthew Wilcox bool 42202c02bf1SMatthew Wilcox help 42302c02bf1SMatthew Wilcox Support entries which occupy multiple consecutive indices in the 42402c02bf1SMatthew Wilcox XArray. 42557578c2eSMatthew Wilcox 4263cb98950SDavid Howellsconfig ASSOCIATIVE_ARRAY 4273cb98950SDavid Howells bool 4283cb98950SDavid Howells help 4293cb98950SDavid Howells Generic associative array. Can be searched and iterated over whilst 4303cb98950SDavid Howells it is being modified. It is also reasonably quick to search and 4313cb98950SDavid Howells modify. The algorithms are non-recursive, and the trees are highly 4323cb98950SDavid Howells capacious. 4333cb98950SDavid Howells 4343cb98950SDavid Howells See: 4353cb98950SDavid Howells 4365fb94e9cSMauro Carvalho Chehab Documentation/core-api/assoc_array.rst 4373cb98950SDavid Howells 4383cb98950SDavid Howells for more information. 4393cb98950SDavid Howells 4408c8d2d96SKent Overstreetconfig CLOSURES 4418c8d2d96SKent Overstreet bool 4428c8d2d96SKent Overstreet 4435ea81769SAl Viroconfig HAS_IOMEM 4446341e62bSChristoph Jaeger bool 4455ea81769SAl Viro depends on !NO_IOMEM 4465ea81769SAl Viro default y 4475ea81769SAl Viro 448fcbfe812SNiklas Schnelleconfig HAS_IOPORT 449fcbfe812SNiklas Schnelle bool 450fcbfe812SNiklas Schnelle 451ce816fa8SUwe Kleine-Königconfig HAS_IOPORT_MAP 4526341e62bSChristoph Jaeger bool 453ce816fa8SUwe Kleine-König depends on HAS_IOMEM && !NO_IOPORT_MAP 454ee36c2bfSAl Viro default y 455ee36c2bfSAl Viro 456cf65a0f6SChristoph Hellwigsource "kernel/dma/Kconfig" 457411f0f3eSHeiko Carstens 458e80a0af4SBart Van Asscheconfig SGL_ALLOC 459e80a0af4SBart Van Assche bool 460e80a0af4SBart Van Assche default n 461e80a0af4SBart Van Assche 462a4ce5a48SChristoph Hellwigconfig IOMMU_HELPER 463a4ce5a48SChristoph Hellwig bool 464a4ce5a48SChristoph Hellwig 465928923c7SGeert Uytterhoevenconfig CHECK_SIGNATURE 466928923c7SGeert Uytterhoeven bool 467928923c7SGeert Uytterhoeven 468aab46da0SRusty Russellconfig CPUMASK_OFFSTACK 469aab46da0SRusty Russell bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS 470aab46da0SRusty Russell help 471aab46da0SRusty Russell Use dynamic allocation for cpumask_var_t, instead of putting 472aab46da0SRusty Russell them on the stack. This is a bit more expensive, but avoids 473aab46da0SRusty Russell stack overflow. 474aab46da0SRusty Russell 4756f9c07beSYury Norovconfig FORCE_NR_CPUS 4765d272dd1SLinus Torvalds def_bool !SMP 4776f9c07beSYury Norov 478c39649c3SBen Hutchingsconfig CPU_RMAP 479c39649c3SBen Hutchings bool 480c39649c3SBen Hutchings depends on SMP 481c39649c3SBen Hutchings 48275957ba3STom Herbertconfig DQL 48375957ba3STom Herbert bool 48475957ba3STom Herbert 485b0125085SGeorge Spelvinconfig GLOB 486b0125085SGeorge Spelvin bool 487b0125085SGeorge Spelvin# This actually supports modular compilation, but the module overhead 488b0125085SGeorge Spelvin# is ridiculous for the amount of code involved. Until an out-of-tree 489b0125085SGeorge Spelvin# driver asks for it, we'll just link it directly it into the kernel 490b0125085SGeorge Spelvin# when required. Since we're ignoring out-of-tree users, there's also 491b0125085SGeorge Spelvin# no need bother prompting for a manual decision: 492b0125085SGeorge Spelvin# prompt "glob_match() function" 493b0125085SGeorge Spelvin help 494b0125085SGeorge Spelvin This option provides a glob_match function for performing 495b0125085SGeorge Spelvin simple text pattern matching. It originated in the ATA code 496b0125085SGeorge Spelvin to blacklist particular drive models, but other device drivers 497b0125085SGeorge Spelvin may need similar functionality. 498b0125085SGeorge Spelvin 499b0125085SGeorge Spelvin All drivers in the Linux kernel tree that require this function 500b0125085SGeorge Spelvin should automatically select this option. Say N unless you 501b0125085SGeorge Spelvin are compiling an out-of tree driver which tells you that it 502b0125085SGeorge Spelvin depends on this. 503b0125085SGeorge Spelvin 5045f9be824SGeorge Spelvinconfig GLOB_SELFTEST 505ba95b045SGeert Uytterhoeven tristate "glob self-test on init" 5065f9be824SGeorge Spelvin depends on GLOB 5075f9be824SGeorge Spelvin help 5085f9be824SGeorge Spelvin This option enables a simple self-test of the glob_match 5095f9be824SGeorge Spelvin function on startup. It is primarily useful for people 5105f9be824SGeorge Spelvin working on the code to ensure they haven't introduced any 5115f9be824SGeorge Spelvin regressions. 5125f9be824SGeorge Spelvin 5135f9be824SGeorge Spelvin It only adds a little bit of code and slows kernel boot (or 5145f9be824SGeorge Spelvin module load) by a small amount, so you're welcome to play with 5155f9be824SGeorge Spelvin it, but you probably don't need it. 5165f9be824SGeorge Spelvin 517e9cc8bddSGeert Uytterhoeven# 518e9cc8bddSGeert Uytterhoeven# Netlink attribute parsing support is select'ed if needed 519e9cc8bddSGeert Uytterhoeven# 520e9cc8bddSGeert Uytterhoevenconfig NLATTR 521e9cc8bddSGeert Uytterhoeven bool 522e9cc8bddSGeert Uytterhoeven 52309d4e0edSPaul Mackerras# 52409d4e0edSPaul Mackerras# Generic 64-bit atomic support is selected if needed 52509d4e0edSPaul Mackerras# 52609d4e0edSPaul Mackerrasconfig GENERIC_ATOMIC64 52709d4e0edSPaul Mackerras bool 52809d4e0edSPaul Mackerras 529b411b363SPhilipp Reisnerconfig LRU_CACHE 530b411b363SPhilipp Reisner tristate 531b411b363SPhilipp Reisner 532c6df4b17SDavid Millerconfig CLZ_TAB 533c6df4b17SDavid Miller bool 534c6df4b17SDavid Miller 535511cbce2SChristoph Hellwigconfig IRQ_POLL 536511cbce2SChristoph Hellwig bool "IRQ polling library" 537511cbce2SChristoph Hellwig help 538511cbce2SChristoph Hellwig Helper library to poll interrupt mitigation using polling. 539511cbce2SChristoph Hellwig 540d9c46b18SDmitry Kasatkinconfig MPILIB 5412e5f094bSDmitry Kasatkin tristate 542c6df4b17SDavid Miller select CLZ_TAB 543d9c46b18SDmitry Kasatkin help 544d9c46b18SDmitry Kasatkin Multiprecision maths library from GnuPG. 545d9c46b18SDmitry Kasatkin It is used to implement RSA digital signature verification, 546d9c46b18SDmitry Kasatkin which is used by IMA/EVM digital signature extension. 547d9c46b18SDmitry Kasatkin 5485e8898e9SDmitry Kasatkinconfig SIGNATURE 5492e5f094bSDmitry Kasatkin tristate 5500d1f64f6SDmitry Kasatkin depends on KEYS 5510d1f64f6SDmitry Kasatkin select CRYPTO 552be440ec7SDmitry Kasatkin select CRYPTO_SHA1 553051dbb91SDmitry Kasatkin select MPILIB 554051dbb91SDmitry Kasatkin help 555051dbb91SDmitry Kasatkin Digital signature verification. Currently only RSA is supported. 556051dbb91SDmitry Kasatkin Implementation is done using GnuPG MPI library 557051dbb91SDmitry Kasatkin 5584f75da36STal Gilboaconfig DIMLIB 5590d5044b4SFlorian Fainelli tristate 560b65e697aSHeng Qi depends on NET 5614f75da36STal Gilboa help 5624f75da36STal Gilboa Dynamic Interrupt Moderation library. 563991ad2b2SRandy Dunlap Implements an algorithm for dynamically changing CQ moderation values 5644f75da36STal Gilboa according to run time performance. 5654f75da36STal Gilboa 566ab253839SDavid Daney# 567ab253839SDavid Daney# libfdt files, only selected if needed. 568ab253839SDavid Daney# 569ab253839SDavid Daneyconfig LIBFDT 570ab253839SDavid Daney bool 571ab253839SDavid Daney 572a77ad6eaSDavid Howellsconfig OID_REGISTRY 573a77ad6eaSDavid Howells tristate 574a77ad6eaSDavid Howells help 575a77ad6eaSDavid Howells Enable fast lookup object identifier registry. 576a77ad6eaSDavid Howells 5770635eb8aSMatthew Garrettconfig UCS2_STRING 5780635eb8aSMatthew Garrett tristate 5790635eb8aSMatthew Garrett 58000b26474SVincenzo Frascino# 58100b26474SVincenzo Frascino# generic vdso 58200b26474SVincenzo Frascino# 58300b26474SVincenzo Frascinosource "lib/vdso/Kconfig" 58400b26474SVincenzo Frascino 585ee89bd6bSGeert Uytterhoevensource "lib/fonts/Kconfig" 586ee89bd6bSGeert Uytterhoeven 587f8bcbe62SRobert Jarzmikconfig SG_SPLIT 588f8bcbe62SRobert Jarzmik def_bool n 589f8bcbe62SRobert Jarzmik help 5907f7e92f7SGeert Uytterhoeven Provides a helper to split scatterlists into chunks, each chunk being 5917f7e92f7SGeert Uytterhoeven a scatterlist. This should be selected by a driver or an API which 5927f7e92f7SGeert Uytterhoeven whishes to split a scatterlist amongst multiple DMA channels. 593f8bcbe62SRobert Jarzmik 5949b1d6c89SMing Linconfig SG_POOL 5959b1d6c89SMing Lin def_bool n 5969b1d6c89SMing Lin help 5979b1d6c89SMing Lin Provides a helper to allocate chained scatterlists. This should be 5989b1d6c89SMing Lin selected by a driver or an API which whishes to allocate chained 5999b1d6c89SMing Lin scatterlist. 6009b1d6c89SMing Lin 601308c09f1SLaura Abbott# 602308c09f1SLaura Abbott# sg chaining option 603308c09f1SLaura Abbott# 604308c09f1SLaura Abbott 6057c703e54SChristoph Hellwigconfig ARCH_NO_SG_CHAIN 606308c09f1SLaura Abbott def_bool n 607308c09f1SLaura Abbott 60861031952SRoss Zwislerconfig ARCH_HAS_PMEM_API 60961031952SRoss Zwisler bool 61061031952SRoss Zwisler 61133dd7075SDan Williamsconfig MEMREGION 61233dd7075SDan Williams bool 61333dd7075SDan Williams 6141156b441SDavidlohr Buesoconfig ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION 6151156b441SDavidlohr Bueso bool 6161156b441SDavidlohr Bueso 6179ffc1d19SDan Williamsconfig ARCH_HAS_MEMREMAP_COMPAT_ALIGN 6189ffc1d19SDan Williams bool 6199ffc1d19SDan Williams 620bd79f947SChristoph Hellwig# use memcpy to implement user copies for nommu architectures 621bd79f947SChristoph Hellwigconfig UACCESS_MEMCPY 622bd79f947SChristoph Hellwig bool 623bd79f947SChristoph Hellwig 6240aed55afSDan Williamsconfig ARCH_HAS_UACCESS_FLUSHCACHE 6250aed55afSDan Williams bool 6260aed55afSDan Williams 627ec6347bbSDan Williams# arch has a concept of a recoverable synchronous exception due to a 628ec6347bbSDan Williams# memory-read error like x86 machine-check or ARM data-abort, and 629ec6347bbSDan Williams# implements copy_mc_to_{user,kernel} to abort and report 630ec6347bbSDan Williams# 'bytes-transferred' if that exception fires when accessing the source 631ec6347bbSDan Williams# buffer. 632ec6347bbSDan Williamsconfig ARCH_HAS_COPY_MC 633522239b4SDan Williams bool 634522239b4SDan Williams 635214d8ca6SThomas Gleixner# Temporary. Goes away when all archs are cleaned up 636214d8ca6SThomas Gleixnerconfig ARCH_STACKWALK 637214d8ca6SThomas Gleixner bool 638214d8ca6SThomas Gleixner 639cd11016eSAlexander Potapenkoconfig STACKDEPOT 640cd11016eSAlexander Potapenko bool 641cd11016eSAlexander Potapenko select STACKTRACE 642fc60e0caSAndrey Konovalov help 643fc60e0caSAndrey Konovalov Stack depot: stack trace storage that avoids duplication 644cd11016eSAlexander Potapenko 6452dba5eb1SVlastimil Babkaconfig STACKDEPOT_ALWAYS_INIT 6462dba5eb1SVlastimil Babka bool 6472dba5eb1SVlastimil Babka select STACKDEPOT 648fc60e0caSAndrey Konovalov help 649fc60e0caSAndrey Konovalov Always initialize stack depot during early boot 650fc60e0caSAndrey Konovalov 651fc60e0caSAndrey Konovalovconfig STACKDEPOT_MAX_FRAMES 652fc60e0caSAndrey Konovalov int "Maximum number of frames in trace saved in stack depot" 653fc60e0caSAndrey Konovalov range 1 256 654fc60e0caSAndrey Konovalov default 64 655fc60e0caSAndrey Konovalov depends on STACKDEPOT 6562dba5eb1SVlastimil Babka 6574e66934eSEric Dumazetconfig REF_TRACKER 6584e66934eSEric Dumazet bool 6594e66934eSEric Dumazet depends on STACKTRACE_SUPPORT 6604e66934eSEric Dumazet select STACKDEPOT 6614e66934eSEric Dumazet 66288459642SOmar Sandovalconfig SBITMAP 66388459642SOmar Sandoval bool 66488459642SOmar Sandoval 66544091d29SJiri Pirkoconfig PARMAN 6669d25af69SGeert Uytterhoeven tristate "parman" if COMPILE_TEST 66744091d29SJiri Pirko 6683dfdecc6SRandy Dunlapconfig OBJAGG 6693dfdecc6SRandy Dunlap tristate "objagg" if COMPILE_TEST 6703dfdecc6SRandy Dunlap 671de9e82c3SNeilBrownconfig LWQ_TEST 672de9e82c3SNeilBrown bool "Boot-time test for lwq queuing" 673de9e82c3SNeilBrown help 674de9e82c3SNeilBrown Run boot-time test of light-weight queuing. 675de9e82c3SNeilBrown 6762de4ff7bSThomas Grafendmenu 677b35cd988SPalmer Dabbelt 67880b0ca98SChristoph Hellwigconfig GENERIC_IOREMAP 67980b0ca98SChristoph Hellwig bool 68080b0ca98SChristoph Hellwig 681e3d59805SMatt Redfearnconfig GENERIC_LIB_ASHLDI3 682b35cd988SPalmer Dabbelt bool 683b35cd988SPalmer Dabbelt 684e3d59805SMatt Redfearnconfig GENERIC_LIB_ASHRDI3 685b35cd988SPalmer Dabbelt bool 686b35cd988SPalmer Dabbelt 687e3d59805SMatt Redfearnconfig GENERIC_LIB_LSHRDI3 688b35cd988SPalmer Dabbelt bool 689b35cd988SPalmer Dabbelt 690e3d59805SMatt Redfearnconfig GENERIC_LIB_MULDI3 691b35cd988SPalmer Dabbelt bool 692b35cd988SPalmer Dabbelt 693e3d59805SMatt Redfearnconfig GENERIC_LIB_CMPDI2 694b35cd988SPalmer Dabbelt bool 695b35cd988SPalmer Dabbelt 696e3d59805SMatt Redfearnconfig GENERIC_LIB_UCMPDI2 697b35cd988SPalmer Dabbelt bool 698b8265621SJacob Keller 699527701edSPalmer Dabbeltconfig GENERIC_LIB_DEVMEM_IS_ALLOWED 700527701edSPalmer Dabbelt bool 701527701edSPalmer Dabbelt 702b8265621SJacob Kellerconfig PLDMFW 703b8265621SJacob Keller bool 704b8265621SJacob Keller default n 705b0706762SJames Bottomley 706b0706762SJames Bottomleyconfig ASN1_ENCODER 707b0706762SJames Bottomley tristate 708cd705ea8SMichael Walle 709cd705ea8SMichael Walleconfig POLYNOMIAL 710cd705ea8SMichael Walle tristate 711a103f466SDave Jiang 712a103f466SDave Jiangconfig FIRMWARE_TABLE 713a103f466SDave Jiang bool 714bf9850f6SKuan-Wei Chiu 715bf9850f6SKuan-Wei Chiuconfig UNION_FIND 716bf9850f6SKuan-Wei Chiu bool 71792a8b224SKuan-Wei Chiu 71892a8b224SKuan-Wei Chiuconfig MIN_HEAP 71992a8b224SKuan-Wei Chiu bool 720