11da177e4SLinus Torvalds# 21da177e4SLinus Torvalds# Library configuration 31da177e4SLinus Torvalds# 41da177e4SLinus Torvalds 54370aa4aSLai Jiangshanconfig BINARY_PRINTF 64370aa4aSLai Jiangshan def_bool n 74370aa4aSLai Jiangshan 81da177e4SLinus Torvaldsmenu "Library routines" 91da177e4SLinus Torvalds 10f5e70d0fSDavid Woodhouseconfig RAID6_PQ 11f5e70d0fSDavid Woodhouse tristate 12f5e70d0fSDavid Woodhouse 13a5cfc1ecSAkinobu Mitaconfig BITREVERSE 14a5cfc1ecSAkinobu Mita tristate 15a5cfc1ecSAkinobu Mita 16556d2f05SYalin Wangconfig HAVE_ARCH_BITREVERSE 17841c0090SChristoph Jaeger bool 18556d2f05SYalin Wang default n 19556d2f05SYalin Wang depends on BITREVERSE 20556d2f05SYalin Wang help 219e522c0dSAndrew Morton This option enables the use of hardware bit-reversal instructions on 229e522c0dSAndrew Morton architectures which support such operations. 23556d2f05SYalin Wang 248759ef32SOskar Schirmerconfig RATIONAL 256341e62bSChristoph Jaeger bool 268759ef32SOskar Schirmer 272922585bSDavid S. Millerconfig GENERIC_STRNCPY_FROM_USER 282922585bSDavid S. Miller bool 292922585bSDavid S. Miller 30a08c5356SLinus Torvaldsconfig GENERIC_STRNLEN_USER 31a08c5356SLinus Torvalds bool 32a08c5356SLinus Torvalds 334cd5773aSAndy Shevchenkoconfig GENERIC_NET_UTILS 344cd5773aSAndy Shevchenko bool 354cd5773aSAndy Shevchenko 3619870defSAlexander van Heukelumconfig GENERIC_FIND_FIRST_BIT 379ba16087SJan Beulich bool 3819870defSAlexander van Heukelum 39b923650bSMichael S. Tsirkinconfig NO_GENERIC_PCI_IOPORT_MAP 40b923650bSMichael S. Tsirkin bool 41b923650bSMichael S. Tsirkin 4266eab4dfSMichael S. Tsirkinconfig GENERIC_PCI_IOMAP 4366eab4dfSMichael S. Tsirkin bool 4466eab4dfSMichael S. Tsirkin 454673ca8eSMichael S. Tsirkinconfig GENERIC_IOMAP 464673ca8eSMichael S. Tsirkin bool 4766eab4dfSMichael S. Tsirkin select GENERIC_PCI_IOMAP 484673ca8eSMichael S. Tsirkin 49087fafd1SRichard Weinbergerconfig GENERIC_IO 506341e62bSChristoph Jaeger bool 51087fafd1SRichard Weinberger default n 52087fafd1SRichard Weinberger 534ccf4beaSWolfram Sangconfig STMP_DEVICE 544ccf4beaSWolfram Sang bool 554ccf4beaSWolfram Sang 56bc08b449SLinus Torvaldsconfig ARCH_USE_CMPXCHG_LOCKREF 57bc08b449SLinus Torvalds bool 58bc08b449SLinus Torvalds 5972d93104SLinus Torvaldsconfig ARCH_HAS_FAST_MULTIPLIER 6072d93104SLinus Torvalds bool 6172d93104SLinus Torvalds 621da177e4SLinus Torvaldsconfig CRC_CCITT 631da177e4SLinus Torvalds tristate "CRC-CCITT functions" 641da177e4SLinus Torvalds help 651da177e4SLinus Torvalds This option is provided for the case where no in-kernel-tree 661da177e4SLinus Torvalds modules require CRC-CCITT functions, but a module built outside 671da177e4SLinus Torvalds the kernel tree does. Such modules that use library CRC-CCITT 681da177e4SLinus Torvalds functions require M here. 691da177e4SLinus Torvalds 707657ec1fSEvgeniy Polyakovconfig CRC16 717657ec1fSEvgeniy Polyakov tristate "CRC16 functions" 727657ec1fSEvgeniy Polyakov help 737657ec1fSEvgeniy Polyakov This option is provided for the case where no in-kernel-tree 747657ec1fSEvgeniy Polyakov modules require CRC16 functions, but a module built outside 757657ec1fSEvgeniy Polyakov the kernel tree does. Such modules that use library CRC16 767657ec1fSEvgeniy Polyakov functions require M here. 777657ec1fSEvgeniy Polyakov 78f11f594eSMartin K. Petersenconfig CRC_T10DIF 79f11f594eSMartin K. Petersen tristate "CRC calculation for the T10 Data Integrity Field" 8068411521SHerbert Xu select CRYPTO 8168411521SHerbert Xu select CRYPTO_CRCT10DIF 82f11f594eSMartin K. Petersen help 83f11f594eSMartin K. Petersen This option is only needed if a module that's not in the 84f11f594eSMartin K. Petersen kernel tree needs to calculate CRC checks for use with the 85f11f594eSMartin K. Petersen SCSI data integrity subsystem. 86f11f594eSMartin K. Petersen 873e7cbae7SIvo van Doornconfig CRC_ITU_T 883e7cbae7SIvo van Doorn tristate "CRC ITU-T V.41 functions" 893e7cbae7SIvo van Doorn help 903e7cbae7SIvo van Doorn This option is provided for the case where no in-kernel-tree 913e7cbae7SIvo van Doorn modules require CRC ITU-T V.41 functions, but a module built outside 923e7cbae7SIvo van Doorn the kernel tree does. Such modules that use library CRC ITU-T V.41 933e7cbae7SIvo van Doorn functions require M here. 943e7cbae7SIvo van Doorn 951da177e4SLinus Torvaldsconfig CRC32 9646c5801eSDarrick J. Wong tristate "CRC32/CRC32c functions" 971da177e4SLinus Torvalds default y 98906d66dfSAkinobu Mita select BITREVERSE 991da177e4SLinus Torvalds help 1001da177e4SLinus Torvalds This option is provided for the case where no in-kernel-tree 10146c5801eSDarrick J. Wong modules require CRC32/CRC32c functions, but a module built outside 10246c5801eSDarrick J. Wong the kernel tree does. Such modules that use library CRC32/CRC32c 10346c5801eSDarrick J. Wong functions require M here. 1041da177e4SLinus Torvalds 1053863ef31SBob Pearsonconfig CRC32_SELFTEST 1065fb7f874SGeert Uytterhoeven tristate "CRC32 perform self test on init" 1073863ef31SBob Pearson depends on CRC32 1083863ef31SBob Pearson help 1093863ef31SBob Pearson This option enables the CRC32 library functions to perform a 1103863ef31SBob Pearson self test on initialization. The self test computes crc32_le 1113863ef31SBob Pearson and crc32_be over byte strings with random alignment and length 1123863ef31SBob Pearson and computes the total elapsed time and number of bytes processed. 1133863ef31SBob Pearson 1145cde7656SDarrick J. Wongchoice 1155cde7656SDarrick J. Wong prompt "CRC32 implementation" 1165cde7656SDarrick J. Wong depends on CRC32 1175cde7656SDarrick J. Wong default CRC32_SLICEBY8 11882edb4baSDarrick J. Wong help 11982edb4baSDarrick J. Wong This option allows a kernel builder to override the default choice 12082edb4baSDarrick J. Wong of CRC32 algorithm. Choose the default ("slice by 8") unless you 12182edb4baSDarrick J. Wong know that you need one of the others. 1225cde7656SDarrick J. Wong 1235cde7656SDarrick J. Wongconfig CRC32_SLICEBY8 1245cde7656SDarrick J. Wong bool "Slice by 8 bytes" 1255cde7656SDarrick J. Wong help 1265cde7656SDarrick J. Wong Calculate checksum 8 bytes at a time with a clever slicing algorithm. 1275cde7656SDarrick J. Wong This is the fastest algorithm, but comes with a 8KiB lookup table. 1285cde7656SDarrick J. Wong Most modern processors have enough cache to hold this table without 1295cde7656SDarrick J. Wong thrashing the cache. 1305cde7656SDarrick J. Wong 1315cde7656SDarrick J. Wong This is the default implementation choice. Choose this one unless 1325cde7656SDarrick J. Wong you have a good reason not to. 1335cde7656SDarrick J. Wong 1345cde7656SDarrick J. Wongconfig CRC32_SLICEBY4 1355cde7656SDarrick J. Wong bool "Slice by 4 bytes" 1365cde7656SDarrick J. Wong help 1375cde7656SDarrick J. Wong Calculate checksum 4 bytes at a time with a clever slicing algorithm. 1385cde7656SDarrick J. Wong This is a bit slower than slice by 8, but has a smaller 4KiB lookup 1395cde7656SDarrick J. Wong table. 1405cde7656SDarrick J. Wong 1415cde7656SDarrick J. Wong Only choose this option if you know what you are doing. 1425cde7656SDarrick J. Wong 1435cde7656SDarrick J. Wongconfig CRC32_SARWATE 1445cde7656SDarrick J. Wong bool "Sarwate's Algorithm (one byte at a time)" 1455cde7656SDarrick J. Wong help 1465cde7656SDarrick J. Wong Calculate checksum a byte at a time using Sarwate's algorithm. This 1475cde7656SDarrick J. Wong is not particularly fast, but has a small 256 byte lookup table. 1485cde7656SDarrick J. Wong 1495cde7656SDarrick J. Wong Only choose this option if you know what you are doing. 1505cde7656SDarrick J. Wong 1515cde7656SDarrick J. Wongconfig CRC32_BIT 1525cde7656SDarrick J. Wong bool "Classic Algorithm (one bit at a time)" 1535cde7656SDarrick J. Wong help 1545cde7656SDarrick J. Wong Calculate checksum one bit at a time. This is VERY slow, but has 1555cde7656SDarrick J. Wong no lookup table. This is provided as a debugging option. 1565cde7656SDarrick J. Wong 1575cde7656SDarrick J. Wong Only choose this option if you are debugging crc32. 1585cde7656SDarrick J. Wong 1595cde7656SDarrick J. Wongendchoice 1605cde7656SDarrick J. Wong 1610cbaa448SJeremy Kerrconfig CRC4 1620cbaa448SJeremy Kerr tristate "CRC4 functions" 1630cbaa448SJeremy Kerr help 1640cbaa448SJeremy Kerr This option is provided for the case where no in-kernel-tree 1650cbaa448SJeremy Kerr modules require CRC4 functions, but a module built outside 1660cbaa448SJeremy Kerr the kernel tree does. Such modules that use library CRC4 1670cbaa448SJeremy Kerr functions require M here. 1680cbaa448SJeremy Kerr 169ad241528SJan Nikitenkoconfig CRC7 170ad241528SJan Nikitenko tristate "CRC7 functions" 171ad241528SJan Nikitenko help 172ad241528SJan Nikitenko This option is provided for the case where no in-kernel-tree 173ad241528SJan Nikitenko modules require CRC7 functions, but a module built outside 174ad241528SJan Nikitenko the kernel tree does. Such modules that use library CRC7 175ad241528SJan Nikitenko functions require M here. 176ad241528SJan Nikitenko 1771da177e4SLinus Torvaldsconfig LIBCRC32C 1781da177e4SLinus Torvalds tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" 17993027354SHerbert Xu select CRYPTO 18069c35efcSHerbert Xu select CRYPTO_CRC32C 1811da177e4SLinus Torvalds help 1821da177e4SLinus Torvalds This option is provided for the case where no in-kernel-tree 1831da177e4SLinus Torvalds modules require CRC32c functions, but a module built outside the 1841da177e4SLinus Torvalds kernel tree does. Such modules that use library CRC32c functions 1851da177e4SLinus Torvalds require M here. See Castagnoli93. 1861da177e4SLinus Torvalds Module will be libcrc32c. 1871da177e4SLinus Torvalds 1887150962dSArend van Sprielconfig CRC8 1897150962dSArend van Spriel tristate "CRC8 function" 1907150962dSArend van Spriel help 1917150962dSArend van Spriel This option provides CRC8 function. Drivers may select this 1927150962dSArend van Spriel when they need to do cyclic redundancy check according CRC8 1937150962dSArend van Spriel algorithm. Module will be called crc8. 1947150962dSArend van Spriel 195e65e1fc2SAl Viroconfig AUDIT_GENERIC 196e65e1fc2SAl Viro bool 197e65e1fc2SAl Viro depends on AUDIT && !AUDIT_ARCH 198e65e1fc2SAl Viro default y 199e65e1fc2SAl Viro 2004b588411SAKASHI Takahiroconfig AUDIT_ARCH_COMPAT_GENERIC 2014b588411SAKASHI Takahiro bool 2024b588411SAKASHI Takahiro default n 2034b588411SAKASHI Takahiro 2044b588411SAKASHI Takahiroconfig AUDIT_COMPAT_GENERIC 2054b588411SAKASHI Takahiro bool 2064b588411SAKASHI Takahiro depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT 2074b588411SAKASHI Takahiro default y 2084b588411SAKASHI Takahiro 209a6a9c0f1SDaniel Borkmannconfig RANDOM32_SELFTEST 210a6a9c0f1SDaniel Borkmann bool "PRNG perform self test on init" 211a6a9c0f1SDaniel Borkmann default n 212a6a9c0f1SDaniel Borkmann help 213a6a9c0f1SDaniel Borkmann This option enables the 32 bit PRNG library functions to perform a 214a6a9c0f1SDaniel Borkmann self test on initialization. 215a6a9c0f1SDaniel Borkmann 2161da177e4SLinus Torvalds# 2171da177e4SLinus Torvalds# compression support is select'ed if needed 2181da177e4SLinus Torvalds# 2192da572c9SDan Streetmanconfig 842_COMPRESS 2205b571677SArnd Bergmann select CRC32 2212da572c9SDan Streetman tristate 2222da572c9SDan Streetman 2232da572c9SDan Streetmanconfig 842_DECOMPRESS 2245b571677SArnd Bergmann select CRC32 2252da572c9SDan Streetman tristate 2262da572c9SDan Streetman 2271da177e4SLinus Torvaldsconfig ZLIB_INFLATE 2281da177e4SLinus Torvalds tristate 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvaldsconfig ZLIB_DEFLATE 2311da177e4SLinus Torvalds tristate 2321fd4e5c3SAndrew Morton select BITREVERSE 2331da177e4SLinus Torvalds 23464c70b1cSRichard Purdieconfig LZO_COMPRESS 23564c70b1cSRichard Purdie tristate 23664c70b1cSRichard Purdie 23764c70b1cSRichard Purdieconfig LZO_DECOMPRESS 23864c70b1cSRichard Purdie tristate 23964c70b1cSRichard Purdie 240c72ac7a1SChanho Minconfig LZ4_COMPRESS 241c72ac7a1SChanho Min tristate 242c72ac7a1SChanho Min 243c72ac7a1SChanho Minconfig LZ4HC_COMPRESS 244c72ac7a1SChanho Min tristate 245c72ac7a1SChanho Min 246e76e1fdfSKyungsik Leeconfig LZ4_DECOMPRESS 247e76e1fdfSKyungsik Lee tristate 248e76e1fdfSKyungsik Lee 24924fa0402SLasse Collinsource "lib/xz/Kconfig" 25024fa0402SLasse Collin 2511da177e4SLinus Torvalds# 252c8531ab3SH. Peter Anvin# These all provide a common interface (hence the apparent duplication with 253c8531ab3SH. Peter Anvin# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) 254c8531ab3SH. Peter Anvin# 255c8531ab3SH. Peter Anvinconfig DECOMPRESS_GZIP 2567856a16eSH. Peter Anvin select ZLIB_INFLATE 257c8531ab3SH. Peter Anvin tristate 258c8531ab3SH. Peter Anvin 259c8531ab3SH. Peter Anvinconfig DECOMPRESS_BZIP2 260c8531ab3SH. Peter Anvin tristate 261c8531ab3SH. Peter Anvin 262c8531ab3SH. Peter Anvinconfig DECOMPRESS_LZMA 263c8531ab3SH. Peter Anvin tristate 264c8531ab3SH. Peter Anvin 2653ebe1243SLasse Collinconfig DECOMPRESS_XZ 2663ebe1243SLasse Collin select XZ_DEC 2673ebe1243SLasse Collin tristate 2683ebe1243SLasse Collin 269cacb246fSAlbin Tonnerreconfig DECOMPRESS_LZO 270cacb246fSAlbin Tonnerre select LZO_DECOMPRESS 271cacb246fSAlbin Tonnerre tristate 272cacb246fSAlbin Tonnerre 273e76e1fdfSKyungsik Leeconfig DECOMPRESS_LZ4 274e76e1fdfSKyungsik Lee select LZ4_DECOMPRESS 275e76e1fdfSKyungsik Lee tristate 276e76e1fdfSKyungsik Lee 277c8531ab3SH. Peter Anvin# 278f14f75b8SJes Sorensen# Generic allocator support is selected if needed 279f14f75b8SJes Sorensen# 280f14f75b8SJes Sorensenconfig GENERIC_ALLOCATOR 2816341e62bSChristoph Jaeger bool 282f14f75b8SJes Sorensen 283f14f75b8SJes Sorensen# 2841da177e4SLinus Torvalds# reed solomon support is select'ed if needed 2851da177e4SLinus Torvalds# 2861da177e4SLinus Torvaldsconfig REED_SOLOMON 2871da177e4SLinus Torvalds tristate 2881da177e4SLinus Torvalds 2891da177e4SLinus Torvaldsconfig REED_SOLOMON_ENC8 2906341e62bSChristoph Jaeger bool 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvaldsconfig REED_SOLOMON_DEC8 2936341e62bSChristoph Jaeger bool 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvaldsconfig REED_SOLOMON_ENC16 2966341e62bSChristoph Jaeger bool 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvaldsconfig REED_SOLOMON_DEC16 2996341e62bSChristoph Jaeger bool 3001da177e4SLinus Torvalds 301f7704347SDavid S. Miller# 302437aa565SIvan Djelic# BCH support is selected if needed 303437aa565SIvan Djelic# 304437aa565SIvan Djelicconfig BCH 305437aa565SIvan Djelic tristate 306437aa565SIvan Djelic 307437aa565SIvan Djelicconfig BCH_CONST_PARAMS 3086341e62bSChristoph Jaeger bool 309437aa565SIvan Djelic help 310437aa565SIvan Djelic Drivers may select this option to force specific constant 311437aa565SIvan Djelic values for parameters 'm' (Galois field order) and 't' 312437aa565SIvan Djelic (error correction capability). Those specific values must 313437aa565SIvan Djelic be set by declaring default values for symbols BCH_CONST_M 314437aa565SIvan Djelic and BCH_CONST_T. 315437aa565SIvan Djelic Doing so will enable extra compiler optimizations, 316437aa565SIvan Djelic improving encoding and decoding performance up to 2x for 317437aa565SIvan Djelic usual (m,t) values (typically such that m*t < 200). 318437aa565SIvan Djelic When this option is selected, the BCH library supports 319437aa565SIvan Djelic only a single (m,t) configuration. This is mainly useful 320437aa565SIvan Djelic for NAND flash board drivers requiring known, fixed BCH 321437aa565SIvan Djelic parameters. 322437aa565SIvan Djelic 323437aa565SIvan Djelicconfig BCH_CONST_M 324437aa565SIvan Djelic int 325437aa565SIvan Djelic range 5 15 326437aa565SIvan Djelic help 327437aa565SIvan Djelic Constant value for Galois field order 'm'. If 'k' is the 328437aa565SIvan Djelic number of data bits to protect, 'm' should be chosen such 329437aa565SIvan Djelic that (k + m*t) <= 2**m - 1. 330437aa565SIvan Djelic Drivers should declare a default value for this symbol if 331437aa565SIvan Djelic they select option BCH_CONST_PARAMS. 332437aa565SIvan Djelic 333437aa565SIvan Djelicconfig BCH_CONST_T 334437aa565SIvan Djelic int 335437aa565SIvan Djelic help 336437aa565SIvan Djelic Constant value for error correction capability in bits 't'. 337437aa565SIvan Djelic Drivers should declare a default value for this symbol if 338437aa565SIvan Djelic they select option BCH_CONST_PARAMS. 339437aa565SIvan Djelic 340437aa565SIvan Djelic# 341f7704347SDavid S. Miller# Textsearch support is select'ed if needed 342f7704347SDavid S. Miller# 3432de4ff7bSThomas Grafconfig TEXTSEARCH 3446341e62bSChristoph Jaeger bool 3451da177e4SLinus Torvalds 346df3fb93aSThomas Grafconfig TEXTSEARCH_KMP 347f7704347SDavid S. Miller tristate 348df3fb93aSThomas Graf 3498082e4edSPablo Neira Ayusoconfig TEXTSEARCH_BM 35029cb9f9cSDavid S. Miller tristate 3518082e4edSPablo Neira Ayuso 3526408f79cSThomas Grafconfig TEXTSEARCH_FSM 353f7704347SDavid S. Miller tristate 3546408f79cSThomas Graf 3555db53f3eSJoern Engelconfig BTREE 3566341e62bSChristoph Jaeger bool 3575db53f3eSJoern Engel 358a88cc108SChris Wilsonconfig INTERVAL_TREE 3596341e62bSChristoph Jaeger bool 360a88cc108SChris Wilson help 361a88cc108SChris Wilson Simple, embeddable, interval-tree. Can find the start of an 362a88cc108SChris Wilson overlapping range in log(n) time and then iterate over all 363a88cc108SChris Wilson overlapping nodes. The algorithm is implemented as an 364a88cc108SChris Wilson augmented rbtree. 365a88cc108SChris Wilson 366a88cc108SChris Wilson See: 367a88cc108SChris Wilson 368a88cc108SChris Wilson Documentation/rbtree.txt 369a88cc108SChris Wilson 370a88cc108SChris Wilson for more information. 371a88cc108SChris Wilson 37257578c2eSMatthew Wilcoxconfig RADIX_TREE_MULTIORDER 37357578c2eSMatthew Wilcox bool 37457578c2eSMatthew Wilcox 3753cb98950SDavid Howellsconfig ASSOCIATIVE_ARRAY 3763cb98950SDavid Howells bool 3773cb98950SDavid Howells help 3783cb98950SDavid Howells Generic associative array. Can be searched and iterated over whilst 3793cb98950SDavid Howells it is being modified. It is also reasonably quick to search and 3803cb98950SDavid Howells modify. The algorithms are non-recursive, and the trees are highly 3813cb98950SDavid Howells capacious. 3823cb98950SDavid Howells 3833cb98950SDavid Howells See: 3843cb98950SDavid Howells 3853cb98950SDavid Howells Documentation/assoc_array.txt 3863cb98950SDavid Howells 3873cb98950SDavid Howells for more information. 3883cb98950SDavid Howells 3895ea81769SAl Viroconfig HAS_IOMEM 3906341e62bSChristoph Jaeger bool 3915ea81769SAl Viro depends on !NO_IOMEM 392087fafd1SRichard Weinberger select GENERIC_IO 3935ea81769SAl Viro default y 3945ea81769SAl Viro 395ce816fa8SUwe Kleine-Königconfig HAS_IOPORT_MAP 3966341e62bSChristoph Jaeger bool 397ce816fa8SUwe Kleine-König depends on HAS_IOMEM && !NO_IOPORT_MAP 398ee36c2bfSAl Viro default y 399ee36c2bfSAl Viro 400411f0f3eSHeiko Carstensconfig HAS_DMA 4016341e62bSChristoph Jaeger bool 402411f0f3eSHeiko Carstens depends on !NO_DMA 403411f0f3eSHeiko Carstens default y 404411f0f3eSHeiko Carstens 4057844572cSBart Van Asscheconfig DMA_NOOP_OPS 4067844572cSBart Van Assche bool 4077844572cSBart Van Assche depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) 4087844572cSBart Van Assche default n 4097844572cSBart Van Assche 410551199acSBart Van Asscheconfig DMA_VIRT_OPS 411551199acSBart Van Assche bool 412551199acSBart Van Assche depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) 413551199acSBart Van Assche default n 414551199acSBart Van Assche 415928923c7SGeert Uytterhoevenconfig CHECK_SIGNATURE 416928923c7SGeert Uytterhoeven bool 417928923c7SGeert Uytterhoeven 418aab46da0SRusty Russellconfig CPUMASK_OFFSTACK 419aab46da0SRusty Russell bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS 420aab46da0SRusty Russell help 421aab46da0SRusty Russell Use dynamic allocation for cpumask_var_t, instead of putting 422aab46da0SRusty Russell them on the stack. This is a bit more expensive, but avoids 423aab46da0SRusty Russell stack overflow. 424aab46da0SRusty Russell 425c39649c3SBen Hutchingsconfig CPU_RMAP 426c39649c3SBen Hutchings bool 427c39649c3SBen Hutchings depends on SMP 428c39649c3SBen Hutchings 42975957ba3STom Herbertconfig DQL 43075957ba3STom Herbert bool 43175957ba3STom Herbert 432b0125085SGeorge Spelvinconfig GLOB 433b0125085SGeorge Spelvin bool 434b0125085SGeorge Spelvin# This actually supports modular compilation, but the module overhead 435b0125085SGeorge Spelvin# is ridiculous for the amount of code involved. Until an out-of-tree 436b0125085SGeorge Spelvin# driver asks for it, we'll just link it directly it into the kernel 437b0125085SGeorge Spelvin# when required. Since we're ignoring out-of-tree users, there's also 438b0125085SGeorge Spelvin# no need bother prompting for a manual decision: 439b0125085SGeorge Spelvin# prompt "glob_match() function" 440b0125085SGeorge Spelvin help 441b0125085SGeorge Spelvin This option provides a glob_match function for performing 442b0125085SGeorge Spelvin simple text pattern matching. It originated in the ATA code 443b0125085SGeorge Spelvin to blacklist particular drive models, but other device drivers 444b0125085SGeorge Spelvin may need similar functionality. 445b0125085SGeorge Spelvin 446b0125085SGeorge Spelvin All drivers in the Linux kernel tree that require this function 447b0125085SGeorge Spelvin should automatically select this option. Say N unless you 448b0125085SGeorge Spelvin are compiling an out-of tree driver which tells you that it 449b0125085SGeorge Spelvin depends on this. 450b0125085SGeorge Spelvin 4515f9be824SGeorge Spelvinconfig GLOB_SELFTEST 452ba95b045SGeert Uytterhoeven tristate "glob self-test on init" 4535f9be824SGeorge Spelvin depends on GLOB 4545f9be824SGeorge Spelvin help 4555f9be824SGeorge Spelvin This option enables a simple self-test of the glob_match 4565f9be824SGeorge Spelvin function on startup. It is primarily useful for people 4575f9be824SGeorge Spelvin working on the code to ensure they haven't introduced any 4585f9be824SGeorge Spelvin regressions. 4595f9be824SGeorge Spelvin 4605f9be824SGeorge Spelvin It only adds a little bit of code and slows kernel boot (or 4615f9be824SGeorge Spelvin module load) by a small amount, so you're welcome to play with 4625f9be824SGeorge Spelvin it, but you probably don't need it. 4635f9be824SGeorge Spelvin 464e9cc8bddSGeert Uytterhoeven# 465e9cc8bddSGeert Uytterhoeven# Netlink attribute parsing support is select'ed if needed 466e9cc8bddSGeert Uytterhoeven# 467e9cc8bddSGeert Uytterhoevenconfig NLATTR 468e9cc8bddSGeert Uytterhoeven bool 469e9cc8bddSGeert Uytterhoeven 47009d4e0edSPaul Mackerras# 47109d4e0edSPaul Mackerras# Generic 64-bit atomic support is selected if needed 47209d4e0edSPaul Mackerras# 47309d4e0edSPaul Mackerrasconfig GENERIC_ATOMIC64 47409d4e0edSPaul Mackerras bool 47509d4e0edSPaul Mackerras 476b411b363SPhilipp Reisnerconfig LRU_CACHE 477b411b363SPhilipp Reisner tristate 478b411b363SPhilipp Reisner 479c6df4b17SDavid Millerconfig CLZ_TAB 480c6df4b17SDavid Miller bool 481c6df4b17SDavid Miller 48210f8113eSArend van Sprielconfig CORDIC 483d89ce936SMichael Witten tristate "CORDIC algorithm" 48410f8113eSArend van Spriel help 485435a95c5SMichael Witten This option provides an implementation of the CORDIC algorithm; 486435a95c5SMichael Witten calculations are in fixed point. Module will be called cordic. 48710f8113eSArend van Spriel 4889c1c21a0SAneesh Vconfig DDR 4899c1c21a0SAneesh V bool "JEDEC DDR data" 4909c1c21a0SAneesh V help 4919c1c21a0SAneesh V Data from JEDEC specs for DDR SDRAM memories, 4929c1c21a0SAneesh V particularly the AC timing parameters and addressing 4939c1c21a0SAneesh V information. This data is useful for drivers handling 4949c1c21a0SAneesh V DDR SDRAM controllers. 4959c1c21a0SAneesh V 496511cbce2SChristoph Hellwigconfig IRQ_POLL 497511cbce2SChristoph Hellwig bool "IRQ polling library" 498511cbce2SChristoph Hellwig help 499511cbce2SChristoph Hellwig Helper library to poll interrupt mitigation using polling. 500511cbce2SChristoph Hellwig 501d9c46b18SDmitry Kasatkinconfig MPILIB 5022e5f094bSDmitry Kasatkin tristate 503c6df4b17SDavid Miller select CLZ_TAB 504d9c46b18SDmitry Kasatkin help 505d9c46b18SDmitry Kasatkin Multiprecision maths library from GnuPG. 506d9c46b18SDmitry Kasatkin It is used to implement RSA digital signature verification, 507d9c46b18SDmitry Kasatkin which is used by IMA/EVM digital signature extension. 508d9c46b18SDmitry Kasatkin 5095e8898e9SDmitry Kasatkinconfig SIGNATURE 5102e5f094bSDmitry Kasatkin tristate 5110d1f64f6SDmitry Kasatkin depends on KEYS 5120d1f64f6SDmitry Kasatkin select CRYPTO 513be440ec7SDmitry Kasatkin select CRYPTO_SHA1 514051dbb91SDmitry Kasatkin select MPILIB 515051dbb91SDmitry Kasatkin help 516051dbb91SDmitry Kasatkin Digital signature verification. Currently only RSA is supported. 517051dbb91SDmitry Kasatkin Implementation is done using GnuPG MPI library 518051dbb91SDmitry Kasatkin 519ab253839SDavid Daney# 520ab253839SDavid Daney# libfdt files, only selected if needed. 521ab253839SDavid Daney# 522ab253839SDavid Daneyconfig LIBFDT 523ab253839SDavid Daney bool 524ab253839SDavid Daney 525a77ad6eaSDavid Howellsconfig OID_REGISTRY 526a77ad6eaSDavid Howells tristate 527a77ad6eaSDavid Howells help 528a77ad6eaSDavid Howells Enable fast lookup object identifier registry. 529a77ad6eaSDavid Howells 5300635eb8aSMatthew Garrettconfig UCS2_STRING 5310635eb8aSMatthew Garrett tristate 5320635eb8aSMatthew Garrett 533ee89bd6bSGeert Uytterhoevensource "lib/fonts/Kconfig" 534ee89bd6bSGeert Uytterhoeven 535f8bcbe62SRobert Jarzmikconfig SG_SPLIT 536f8bcbe62SRobert Jarzmik def_bool n 537f8bcbe62SRobert Jarzmik help 5387f7e92f7SGeert Uytterhoeven Provides a helper to split scatterlists into chunks, each chunk being 5397f7e92f7SGeert Uytterhoeven a scatterlist. This should be selected by a driver or an API which 5407f7e92f7SGeert Uytterhoeven whishes to split a scatterlist amongst multiple DMA channels. 541f8bcbe62SRobert Jarzmik 5429b1d6c89SMing Linconfig SG_POOL 5439b1d6c89SMing Lin def_bool n 5449b1d6c89SMing Lin help 5459b1d6c89SMing Lin Provides a helper to allocate chained scatterlists. This should be 5469b1d6c89SMing Lin selected by a driver or an API which whishes to allocate chained 5479b1d6c89SMing Lin scatterlist. 5489b1d6c89SMing Lin 549308c09f1SLaura Abbott# 550308c09f1SLaura Abbott# sg chaining option 551308c09f1SLaura Abbott# 552308c09f1SLaura Abbott 553308c09f1SLaura Abbottconfig ARCH_HAS_SG_CHAIN 554308c09f1SLaura Abbott def_bool n 555308c09f1SLaura Abbott 55661031952SRoss Zwislerconfig ARCH_HAS_PMEM_API 55761031952SRoss Zwisler bool 55861031952SRoss Zwisler 5590aed55afSDan Williamsconfig ARCH_HAS_UACCESS_FLUSHCACHE 5600aed55afSDan Williams bool 5610aed55afSDan Williams 56267a3e8feSRoss Zwislerconfig ARCH_HAS_MMIO_FLUSH 56367a3e8feSRoss Zwisler bool 56467a3e8feSRoss Zwisler 565cd11016eSAlexander Potapenkoconfig STACKDEPOT 566cd11016eSAlexander Potapenko bool 567cd11016eSAlexander Potapenko select STACKTRACE 568cd11016eSAlexander Potapenko 56988459642SOmar Sandovalconfig SBITMAP 57088459642SOmar Sandoval bool 57188459642SOmar Sandoval 57244091d29SJiri Pirkoconfig PARMAN 5739d25af69SGeert Uytterhoeven tristate "parman" if COMPILE_TEST 57444091d29SJiri Pirko 575cf4a7207SChris Wilsonconfig PRIME_NUMBERS 57664a57719SDave Airlie tristate 577cf4a7207SChris Wilson 578*03270c13SMatthew Wilcoxconfig STRING_SELFTEST 579*03270c13SMatthew Wilcox bool "Test string functions" 580*03270c13SMatthew Wilcox 5812de4ff7bSThomas Grafendmenu 582