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 494ccf4beaSWolfram Sangconfig STMP_DEVICE 504ccf4beaSWolfram Sang bool 514ccf4beaSWolfram Sang 52bc08b449SLinus Torvaldsconfig ARCH_USE_CMPXCHG_LOCKREF 53bc08b449SLinus Torvalds bool 54bc08b449SLinus Torvalds 5572d93104SLinus Torvaldsconfig ARCH_HAS_FAST_MULTIPLIER 5672d93104SLinus Torvalds bool 5772d93104SLinus Torvalds 58031e3601SZhichang Yuanconfig INDIRECT_PIO 59031e3601SZhichang Yuan bool "Access I/O in non-MMIO mode" 60031e3601SZhichang Yuan depends on ARM64 61031e3601SZhichang Yuan help 62031e3601SZhichang Yuan On some platforms where no separate I/O space exists, there are I/O 63031e3601SZhichang Yuan hosts which can not be accessed in MMIO mode. Using the logical PIO 64031e3601SZhichang Yuan mechanism, the host-local I/O resource can be mapped into system 65031e3601SZhichang Yuan logic PIO space shared with MMIO hosts, such as PCI/PCIe, then the 66031e3601SZhichang Yuan system can access the I/O devices with the mapped-logic PIO through 67031e3601SZhichang Yuan I/O accessors. 68031e3601SZhichang Yuan 69031e3601SZhichang Yuan This way has relatively little I/O performance cost. Please make 70031e3601SZhichang Yuan sure your devices really need this configure item enabled. 71031e3601SZhichang Yuan 72031e3601SZhichang Yuan When in doubt, say N. 73031e3601SZhichang Yuan 741da177e4SLinus Torvaldsconfig CRC_CCITT 751da177e4SLinus Torvalds tristate "CRC-CCITT functions" 761da177e4SLinus Torvalds help 771da177e4SLinus Torvalds This option is provided for the case where no in-kernel-tree 781da177e4SLinus Torvalds modules require CRC-CCITT functions, but a module built outside 791da177e4SLinus Torvalds the kernel tree does. Such modules that use library CRC-CCITT 801da177e4SLinus Torvalds functions require M here. 811da177e4SLinus Torvalds 827657ec1fSEvgeniy Polyakovconfig CRC16 837657ec1fSEvgeniy Polyakov tristate "CRC16 functions" 847657ec1fSEvgeniy Polyakov help 857657ec1fSEvgeniy Polyakov This option is provided for the case where no in-kernel-tree 867657ec1fSEvgeniy Polyakov modules require CRC16 functions, but a module built outside 877657ec1fSEvgeniy Polyakov the kernel tree does. Such modules that use library CRC16 887657ec1fSEvgeniy Polyakov functions require M here. 897657ec1fSEvgeniy Polyakov 90f11f594eSMartin K. Petersenconfig CRC_T10DIF 91f11f594eSMartin K. Petersen tristate "CRC calculation for the T10 Data Integrity Field" 9268411521SHerbert Xu select CRYPTO 9368411521SHerbert Xu select CRYPTO_CRCT10DIF 94f11f594eSMartin K. Petersen help 95f11f594eSMartin K. Petersen This option is only needed if a module that's not in the 96f11f594eSMartin K. Petersen kernel tree needs to calculate CRC checks for use with the 97f11f594eSMartin K. Petersen SCSI data integrity subsystem. 98f11f594eSMartin K. Petersen 993e7cbae7SIvo van Doornconfig CRC_ITU_T 1003e7cbae7SIvo van Doorn tristate "CRC ITU-T V.41 functions" 1013e7cbae7SIvo van Doorn help 1023e7cbae7SIvo van Doorn This option is provided for the case where no in-kernel-tree 1033e7cbae7SIvo van Doorn modules require CRC ITU-T V.41 functions, but a module built outside 1043e7cbae7SIvo van Doorn the kernel tree does. Such modules that use library CRC ITU-T V.41 1053e7cbae7SIvo van Doorn functions require M here. 1063e7cbae7SIvo van Doorn 1071da177e4SLinus Torvaldsconfig CRC32 10846c5801eSDarrick J. Wong tristate "CRC32/CRC32c functions" 1091da177e4SLinus Torvalds default y 110906d66dfSAkinobu Mita select BITREVERSE 1111da177e4SLinus Torvalds help 1121da177e4SLinus Torvalds This option is provided for the case where no in-kernel-tree 11346c5801eSDarrick J. Wong modules require CRC32/CRC32c functions, but a module built outside 11446c5801eSDarrick J. Wong the kernel tree does. Such modules that use library CRC32/CRC32c 11546c5801eSDarrick J. Wong functions require M here. 1161da177e4SLinus Torvalds 1173863ef31SBob Pearsonconfig CRC32_SELFTEST 1185fb7f874SGeert Uytterhoeven tristate "CRC32 perform self test on init" 1193863ef31SBob Pearson depends on CRC32 1203863ef31SBob Pearson help 1213863ef31SBob Pearson This option enables the CRC32 library functions to perform a 1223863ef31SBob Pearson self test on initialization. The self test computes crc32_le 1233863ef31SBob Pearson and crc32_be over byte strings with random alignment and length 1243863ef31SBob Pearson and computes the total elapsed time and number of bytes processed. 1253863ef31SBob Pearson 1265cde7656SDarrick J. Wongchoice 1275cde7656SDarrick J. Wong prompt "CRC32 implementation" 1285cde7656SDarrick J. Wong depends on CRC32 1295cde7656SDarrick J. Wong default CRC32_SLICEBY8 13082edb4baSDarrick J. Wong help 13182edb4baSDarrick J. Wong This option allows a kernel builder to override the default choice 13282edb4baSDarrick J. Wong of CRC32 algorithm. Choose the default ("slice by 8") unless you 13382edb4baSDarrick J. Wong know that you need one of the others. 1345cde7656SDarrick J. Wong 1355cde7656SDarrick J. Wongconfig CRC32_SLICEBY8 1365cde7656SDarrick J. Wong bool "Slice by 8 bytes" 1375cde7656SDarrick J. Wong help 1385cde7656SDarrick J. Wong Calculate checksum 8 bytes at a time with a clever slicing algorithm. 1395cde7656SDarrick J. Wong This is the fastest algorithm, but comes with a 8KiB lookup table. 1405cde7656SDarrick J. Wong Most modern processors have enough cache to hold this table without 1415cde7656SDarrick J. Wong thrashing the cache. 1425cde7656SDarrick J. Wong 1435cde7656SDarrick J. Wong This is the default implementation choice. Choose this one unless 1445cde7656SDarrick J. Wong you have a good reason not to. 1455cde7656SDarrick J. Wong 1465cde7656SDarrick J. Wongconfig CRC32_SLICEBY4 1475cde7656SDarrick J. Wong bool "Slice by 4 bytes" 1485cde7656SDarrick J. Wong help 1495cde7656SDarrick J. Wong Calculate checksum 4 bytes at a time with a clever slicing algorithm. 1505cde7656SDarrick J. Wong This is a bit slower than slice by 8, but has a smaller 4KiB lookup 1515cde7656SDarrick J. Wong table. 1525cde7656SDarrick J. Wong 1535cde7656SDarrick J. Wong Only choose this option if you know what you are doing. 1545cde7656SDarrick J. Wong 1555cde7656SDarrick J. Wongconfig CRC32_SARWATE 1565cde7656SDarrick J. Wong bool "Sarwate's Algorithm (one byte at a time)" 1575cde7656SDarrick J. Wong help 1585cde7656SDarrick J. Wong Calculate checksum a byte at a time using Sarwate's algorithm. This 1595cde7656SDarrick J. Wong is not particularly fast, but has a small 256 byte lookup table. 1605cde7656SDarrick J. Wong 1615cde7656SDarrick J. Wong Only choose this option if you know what you are doing. 1625cde7656SDarrick J. Wong 1635cde7656SDarrick J. Wongconfig CRC32_BIT 1645cde7656SDarrick J. Wong bool "Classic Algorithm (one bit at a time)" 1655cde7656SDarrick J. Wong help 1665cde7656SDarrick J. Wong Calculate checksum one bit at a time. This is VERY slow, but has 1675cde7656SDarrick J. Wong no lookup table. This is provided as a debugging option. 1685cde7656SDarrick J. Wong 1695cde7656SDarrick J. Wong Only choose this option if you are debugging crc32. 1705cde7656SDarrick J. Wong 1715cde7656SDarrick J. Wongendchoice 1725cde7656SDarrick J. Wong 1730cbaa448SJeremy Kerrconfig CRC4 1740cbaa448SJeremy Kerr tristate "CRC4 functions" 1750cbaa448SJeremy Kerr help 1760cbaa448SJeremy Kerr This option is provided for the case where no in-kernel-tree 1770cbaa448SJeremy Kerr modules require CRC4 functions, but a module built outside 1780cbaa448SJeremy Kerr the kernel tree does. Such modules that use library CRC4 1790cbaa448SJeremy Kerr functions require M here. 1800cbaa448SJeremy Kerr 181ad241528SJan Nikitenkoconfig CRC7 182ad241528SJan Nikitenko tristate "CRC7 functions" 183ad241528SJan Nikitenko help 184ad241528SJan Nikitenko This option is provided for the case where no in-kernel-tree 185ad241528SJan Nikitenko modules require CRC7 functions, but a module built outside 186ad241528SJan Nikitenko the kernel tree does. Such modules that use library CRC7 187ad241528SJan Nikitenko functions require M here. 188ad241528SJan Nikitenko 1891da177e4SLinus Torvaldsconfig LIBCRC32C 1901da177e4SLinus Torvalds tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" 19193027354SHerbert Xu select CRYPTO 19269c35efcSHerbert Xu select CRYPTO_CRC32C 1931da177e4SLinus Torvalds help 1941da177e4SLinus Torvalds This option is provided for the case where no in-kernel-tree 1951da177e4SLinus Torvalds modules require CRC32c functions, but a module built outside the 1961da177e4SLinus Torvalds kernel tree does. Such modules that use library CRC32c functions 1971da177e4SLinus Torvalds require M here. See Castagnoli93. 1981da177e4SLinus Torvalds Module will be libcrc32c. 1991da177e4SLinus Torvalds 2007150962dSArend van Sprielconfig CRC8 2017150962dSArend van Spriel tristate "CRC8 function" 2027150962dSArend van Spriel help 2037150962dSArend van Spriel This option provides CRC8 function. Drivers may select this 2047150962dSArend van Spriel when they need to do cyclic redundancy check according CRC8 2057150962dSArend van Spriel algorithm. Module will be called crc8. 2067150962dSArend van Spriel 2075d240522SNick Terrellconfig XXHASH 2085d240522SNick Terrell tristate 2095d240522SNick Terrell 210e65e1fc2SAl Viroconfig AUDIT_GENERIC 211e65e1fc2SAl Viro bool 212e65e1fc2SAl Viro depends on AUDIT && !AUDIT_ARCH 213e65e1fc2SAl Viro default y 214e65e1fc2SAl Viro 2154b588411SAKASHI Takahiroconfig AUDIT_ARCH_COMPAT_GENERIC 2164b588411SAKASHI Takahiro bool 2174b588411SAKASHI Takahiro default n 2184b588411SAKASHI Takahiro 2194b588411SAKASHI Takahiroconfig AUDIT_COMPAT_GENERIC 2204b588411SAKASHI Takahiro bool 2214b588411SAKASHI Takahiro depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT 2224b588411SAKASHI Takahiro default y 2234b588411SAKASHI Takahiro 224a6a9c0f1SDaniel Borkmannconfig RANDOM32_SELFTEST 225a6a9c0f1SDaniel Borkmann bool "PRNG perform self test on init" 226a6a9c0f1SDaniel Borkmann default n 227a6a9c0f1SDaniel Borkmann help 228a6a9c0f1SDaniel Borkmann This option enables the 32 bit PRNG library functions to perform a 229a6a9c0f1SDaniel Borkmann self test on initialization. 230a6a9c0f1SDaniel Borkmann 2311da177e4SLinus Torvalds# 2321da177e4SLinus Torvalds# compression support is select'ed if needed 2331da177e4SLinus Torvalds# 2342da572c9SDan Streetmanconfig 842_COMPRESS 2355b571677SArnd Bergmann select CRC32 2362da572c9SDan Streetman tristate 2372da572c9SDan Streetman 2382da572c9SDan Streetmanconfig 842_DECOMPRESS 2395b571677SArnd Bergmann select CRC32 2402da572c9SDan Streetman tristate 2412da572c9SDan Streetman 2421da177e4SLinus Torvaldsconfig ZLIB_INFLATE 2431da177e4SLinus Torvalds tristate 2441da177e4SLinus Torvalds 2451da177e4SLinus Torvaldsconfig ZLIB_DEFLATE 2461da177e4SLinus Torvalds tristate 2471fd4e5c3SAndrew Morton select BITREVERSE 2481da177e4SLinus Torvalds 24964c70b1cSRichard Purdieconfig LZO_COMPRESS 25064c70b1cSRichard Purdie tristate 25164c70b1cSRichard Purdie 25264c70b1cSRichard Purdieconfig LZO_DECOMPRESS 25364c70b1cSRichard Purdie tristate 25464c70b1cSRichard Purdie 255c72ac7a1SChanho Minconfig LZ4_COMPRESS 256c72ac7a1SChanho Min tristate 257c72ac7a1SChanho Min 258c72ac7a1SChanho Minconfig LZ4HC_COMPRESS 259c72ac7a1SChanho Min tristate 260c72ac7a1SChanho Min 261e76e1fdfSKyungsik Leeconfig LZ4_DECOMPRESS 262e76e1fdfSKyungsik Lee tristate 263e76e1fdfSKyungsik Lee 26473f3d1b4SNick Terrellconfig ZSTD_COMPRESS 26573f3d1b4SNick Terrell select XXHASH 26673f3d1b4SNick Terrell tristate 26773f3d1b4SNick Terrell 26873f3d1b4SNick Terrellconfig ZSTD_DECOMPRESS 26973f3d1b4SNick Terrell select XXHASH 27073f3d1b4SNick Terrell tristate 27173f3d1b4SNick Terrell 27224fa0402SLasse Collinsource "lib/xz/Kconfig" 27324fa0402SLasse Collin 2741da177e4SLinus Torvalds# 275c8531ab3SH. Peter Anvin# These all provide a common interface (hence the apparent duplication with 276c8531ab3SH. Peter Anvin# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) 277c8531ab3SH. Peter Anvin# 278c8531ab3SH. Peter Anvinconfig DECOMPRESS_GZIP 2797856a16eSH. Peter Anvin select ZLIB_INFLATE 280c8531ab3SH. Peter Anvin tristate 281c8531ab3SH. Peter Anvin 282c8531ab3SH. Peter Anvinconfig DECOMPRESS_BZIP2 283c8531ab3SH. Peter Anvin tristate 284c8531ab3SH. Peter Anvin 285c8531ab3SH. Peter Anvinconfig DECOMPRESS_LZMA 286c8531ab3SH. Peter Anvin tristate 287c8531ab3SH. Peter Anvin 2883ebe1243SLasse Collinconfig DECOMPRESS_XZ 2893ebe1243SLasse Collin select XZ_DEC 2903ebe1243SLasse Collin tristate 2913ebe1243SLasse Collin 292cacb246fSAlbin Tonnerreconfig DECOMPRESS_LZO 293cacb246fSAlbin Tonnerre select LZO_DECOMPRESS 294cacb246fSAlbin Tonnerre tristate 295cacb246fSAlbin Tonnerre 296e76e1fdfSKyungsik Leeconfig DECOMPRESS_LZ4 297e76e1fdfSKyungsik Lee select LZ4_DECOMPRESS 298e76e1fdfSKyungsik Lee tristate 299e76e1fdfSKyungsik Lee 300c8531ab3SH. Peter Anvin# 301f14f75b8SJes Sorensen# Generic allocator support is selected if needed 302f14f75b8SJes Sorensen# 303f14f75b8SJes Sorensenconfig GENERIC_ALLOCATOR 3046341e62bSChristoph Jaeger bool 305f14f75b8SJes Sorensen 306f14f75b8SJes Sorensen# 3071da177e4SLinus Torvalds# reed solomon support is select'ed if needed 3081da177e4SLinus Torvalds# 3091da177e4SLinus Torvaldsconfig REED_SOLOMON 3101da177e4SLinus Torvalds tristate 3111da177e4SLinus Torvalds 3121da177e4SLinus Torvaldsconfig REED_SOLOMON_ENC8 3136341e62bSChristoph Jaeger bool 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvaldsconfig REED_SOLOMON_DEC8 3166341e62bSChristoph Jaeger bool 3171da177e4SLinus Torvalds 3181da177e4SLinus Torvaldsconfig REED_SOLOMON_ENC16 3196341e62bSChristoph Jaeger bool 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvaldsconfig REED_SOLOMON_DEC16 3226341e62bSChristoph Jaeger bool 3231da177e4SLinus Torvalds 324f7704347SDavid S. Miller# 325437aa565SIvan Djelic# BCH support is selected if needed 326437aa565SIvan Djelic# 327437aa565SIvan Djelicconfig BCH 328437aa565SIvan Djelic tristate 329437aa565SIvan Djelic 330437aa565SIvan Djelicconfig BCH_CONST_PARAMS 3316341e62bSChristoph Jaeger bool 332437aa565SIvan Djelic help 333437aa565SIvan Djelic Drivers may select this option to force specific constant 334437aa565SIvan Djelic values for parameters 'm' (Galois field order) and 't' 335437aa565SIvan Djelic (error correction capability). Those specific values must 336437aa565SIvan Djelic be set by declaring default values for symbols BCH_CONST_M 337437aa565SIvan Djelic and BCH_CONST_T. 338437aa565SIvan Djelic Doing so will enable extra compiler optimizations, 339437aa565SIvan Djelic improving encoding and decoding performance up to 2x for 340437aa565SIvan Djelic usual (m,t) values (typically such that m*t < 200). 341437aa565SIvan Djelic When this option is selected, the BCH library supports 342437aa565SIvan Djelic only a single (m,t) configuration. This is mainly useful 343437aa565SIvan Djelic for NAND flash board drivers requiring known, fixed BCH 344437aa565SIvan Djelic parameters. 345437aa565SIvan Djelic 346437aa565SIvan Djelicconfig BCH_CONST_M 347437aa565SIvan Djelic int 348437aa565SIvan Djelic range 5 15 349437aa565SIvan Djelic help 350437aa565SIvan Djelic Constant value for Galois field order 'm'. If 'k' is the 351437aa565SIvan Djelic number of data bits to protect, 'm' should be chosen such 352437aa565SIvan Djelic that (k + m*t) <= 2**m - 1. 353437aa565SIvan Djelic Drivers should declare a default value for this symbol if 354437aa565SIvan Djelic they select option BCH_CONST_PARAMS. 355437aa565SIvan Djelic 356437aa565SIvan Djelicconfig BCH_CONST_T 357437aa565SIvan Djelic int 358437aa565SIvan Djelic help 359437aa565SIvan Djelic Constant value for error correction capability in bits 't'. 360437aa565SIvan Djelic Drivers should declare a default value for this symbol if 361437aa565SIvan Djelic they select option BCH_CONST_PARAMS. 362437aa565SIvan Djelic 363437aa565SIvan Djelic# 364f7704347SDavid S. Miller# Textsearch support is select'ed if needed 365f7704347SDavid S. Miller# 3662de4ff7bSThomas Grafconfig TEXTSEARCH 3676341e62bSChristoph Jaeger bool 3681da177e4SLinus Torvalds 369df3fb93aSThomas Grafconfig TEXTSEARCH_KMP 370f7704347SDavid S. Miller tristate 371df3fb93aSThomas Graf 3728082e4edSPablo Neira Ayusoconfig TEXTSEARCH_BM 37329cb9f9cSDavid S. Miller tristate 3748082e4edSPablo Neira Ayuso 3756408f79cSThomas Grafconfig TEXTSEARCH_FSM 376f7704347SDavid S. Miller tristate 3776408f79cSThomas Graf 3785db53f3eSJoern Engelconfig BTREE 3796341e62bSChristoph Jaeger bool 3805db53f3eSJoern Engel 381a88cc108SChris Wilsonconfig INTERVAL_TREE 3826341e62bSChristoph Jaeger bool 383a88cc108SChris Wilson help 384a88cc108SChris Wilson Simple, embeddable, interval-tree. Can find the start of an 385a88cc108SChris Wilson overlapping range in log(n) time and then iterate over all 386a88cc108SChris Wilson overlapping nodes. The algorithm is implemented as an 387a88cc108SChris Wilson augmented rbtree. 388a88cc108SChris Wilson 389a88cc108SChris Wilson See: 390a88cc108SChris Wilson 391a88cc108SChris Wilson Documentation/rbtree.txt 392a88cc108SChris Wilson 393a88cc108SChris Wilson for more information. 394a88cc108SChris Wilson 39557578c2eSMatthew Wilcoxconfig RADIX_TREE_MULTIORDER 39657578c2eSMatthew Wilcox bool 39757578c2eSMatthew Wilcox 3983cb98950SDavid Howellsconfig ASSOCIATIVE_ARRAY 3993cb98950SDavid Howells bool 4003cb98950SDavid Howells help 4013cb98950SDavid Howells Generic associative array. Can be searched and iterated over whilst 4023cb98950SDavid Howells it is being modified. It is also reasonably quick to search and 4033cb98950SDavid Howells modify. The algorithms are non-recursive, and the trees are highly 4043cb98950SDavid Howells capacious. 4053cb98950SDavid Howells 4063cb98950SDavid Howells See: 4073cb98950SDavid Howells 4083cb98950SDavid Howells Documentation/assoc_array.txt 4093cb98950SDavid Howells 4103cb98950SDavid Howells for more information. 4113cb98950SDavid Howells 4125ea81769SAl Viroconfig HAS_IOMEM 4136341e62bSChristoph Jaeger bool 4145ea81769SAl Viro depends on !NO_IOMEM 415087fafd1SRichard Weinberger select GENERIC_IO 4165ea81769SAl Viro default y 4175ea81769SAl Viro 418ce816fa8SUwe Kleine-Königconfig HAS_IOPORT_MAP 4196341e62bSChristoph Jaeger bool 420ce816fa8SUwe Kleine-König depends on HAS_IOMEM && !NO_IOPORT_MAP 421ee36c2bfSAl Viro default y 422ee36c2bfSAl Viro 423411f0f3eSHeiko Carstensconfig HAS_DMA 4246341e62bSChristoph Jaeger bool 425411f0f3eSHeiko Carstens depends on !NO_DMA 426411f0f3eSHeiko Carstens default y 427411f0f3eSHeiko Carstens 428e80a0af4SBart Van Asscheconfig SGL_ALLOC 429e80a0af4SBart Van Assche bool 430e80a0af4SBart Van Assche default n 431e80a0af4SBart Van Assche 43286596f0aSChristoph Hellwigconfig NEED_SG_DMA_LENGTH 43386596f0aSChristoph Hellwig bool 43486596f0aSChristoph Hellwig 435f616ab59SChristoph Hellwigconfig NEED_DMA_MAP_STATE 436f616ab59SChristoph Hellwig bool 437f616ab59SChristoph Hellwig 4384965a687SChristoph Hellwigconfig ARCH_DMA_ADDR_T_64BIT 4394965a687SChristoph Hellwig def_bool 64BIT || PHYS_ADDR_T_64BIT 4404965a687SChristoph Hellwig 441a4ce5a48SChristoph Hellwigconfig IOMMU_HELPER 442a4ce5a48SChristoph Hellwig bool 443a4ce5a48SChristoph Hellwig 444002e6745SChristoph Hellwigconfig DMA_DIRECT_OPS 4457844572cSBart Van Assche bool 446*35ddb69cSChristoph Hellwig depends on HAS_DMA 4477844572cSBart Van Assche 448551199acSBart Van Asscheconfig DMA_VIRT_OPS 449551199acSBart Van Assche bool 450*35ddb69cSChristoph Hellwig depends on HAS_DMA 451551199acSBart Van Assche 45209230cbcSChristoph Hellwigconfig SWIOTLB 45309230cbcSChristoph Hellwig bool 45409230cbcSChristoph Hellwig select DMA_DIRECT_OPS 45509230cbcSChristoph Hellwig select NEED_DMA_MAP_STATE 45609230cbcSChristoph Hellwig 457928923c7SGeert Uytterhoevenconfig CHECK_SIGNATURE 458928923c7SGeert Uytterhoeven bool 459928923c7SGeert Uytterhoeven 460aab46da0SRusty Russellconfig CPUMASK_OFFSTACK 461aab46da0SRusty Russell bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS 462aab46da0SRusty Russell help 463aab46da0SRusty Russell Use dynamic allocation for cpumask_var_t, instead of putting 464aab46da0SRusty Russell them on the stack. This is a bit more expensive, but avoids 465aab46da0SRusty Russell stack overflow. 466aab46da0SRusty Russell 467c39649c3SBen Hutchingsconfig CPU_RMAP 468c39649c3SBen Hutchings bool 469c39649c3SBen Hutchings depends on SMP 470c39649c3SBen Hutchings 47175957ba3STom Herbertconfig DQL 47275957ba3STom Herbert bool 47375957ba3STom Herbert 474b0125085SGeorge Spelvinconfig GLOB 475b0125085SGeorge Spelvin bool 476b0125085SGeorge Spelvin# This actually supports modular compilation, but the module overhead 477b0125085SGeorge Spelvin# is ridiculous for the amount of code involved. Until an out-of-tree 478b0125085SGeorge Spelvin# driver asks for it, we'll just link it directly it into the kernel 479b0125085SGeorge Spelvin# when required. Since we're ignoring out-of-tree users, there's also 480b0125085SGeorge Spelvin# no need bother prompting for a manual decision: 481b0125085SGeorge Spelvin# prompt "glob_match() function" 482b0125085SGeorge Spelvin help 483b0125085SGeorge Spelvin This option provides a glob_match function for performing 484b0125085SGeorge Spelvin simple text pattern matching. It originated in the ATA code 485b0125085SGeorge Spelvin to blacklist particular drive models, but other device drivers 486b0125085SGeorge Spelvin may need similar functionality. 487b0125085SGeorge Spelvin 488b0125085SGeorge Spelvin All drivers in the Linux kernel tree that require this function 489b0125085SGeorge Spelvin should automatically select this option. Say N unless you 490b0125085SGeorge Spelvin are compiling an out-of tree driver which tells you that it 491b0125085SGeorge Spelvin depends on this. 492b0125085SGeorge Spelvin 4935f9be824SGeorge Spelvinconfig GLOB_SELFTEST 494ba95b045SGeert Uytterhoeven tristate "glob self-test on init" 4955f9be824SGeorge Spelvin depends on GLOB 4965f9be824SGeorge Spelvin help 4975f9be824SGeorge Spelvin This option enables a simple self-test of the glob_match 4985f9be824SGeorge Spelvin function on startup. It is primarily useful for people 4995f9be824SGeorge Spelvin working on the code to ensure they haven't introduced any 5005f9be824SGeorge Spelvin regressions. 5015f9be824SGeorge Spelvin 5025f9be824SGeorge Spelvin It only adds a little bit of code and slows kernel boot (or 5035f9be824SGeorge Spelvin module load) by a small amount, so you're welcome to play with 5045f9be824SGeorge Spelvin it, but you probably don't need it. 5055f9be824SGeorge Spelvin 506e9cc8bddSGeert Uytterhoeven# 507e9cc8bddSGeert Uytterhoeven# Netlink attribute parsing support is select'ed if needed 508e9cc8bddSGeert Uytterhoeven# 509e9cc8bddSGeert Uytterhoevenconfig NLATTR 510e9cc8bddSGeert Uytterhoeven bool 511e9cc8bddSGeert Uytterhoeven 51209d4e0edSPaul Mackerras# 51309d4e0edSPaul Mackerras# Generic 64-bit atomic support is selected if needed 51409d4e0edSPaul Mackerras# 51509d4e0edSPaul Mackerrasconfig GENERIC_ATOMIC64 51609d4e0edSPaul Mackerras bool 51709d4e0edSPaul Mackerras 518b411b363SPhilipp Reisnerconfig LRU_CACHE 519b411b363SPhilipp Reisner tristate 520b411b363SPhilipp Reisner 521c6df4b17SDavid Millerconfig CLZ_TAB 522c6df4b17SDavid Miller bool 523c6df4b17SDavid Miller 52410f8113eSArend van Sprielconfig CORDIC 525d89ce936SMichael Witten tristate "CORDIC algorithm" 52610f8113eSArend van Spriel help 527435a95c5SMichael Witten This option provides an implementation of the CORDIC algorithm; 528435a95c5SMichael Witten calculations are in fixed point. Module will be called cordic. 52910f8113eSArend van Spriel 5309c1c21a0SAneesh Vconfig DDR 5319c1c21a0SAneesh V bool "JEDEC DDR data" 5329c1c21a0SAneesh V help 5339c1c21a0SAneesh V Data from JEDEC specs for DDR SDRAM memories, 5349c1c21a0SAneesh V particularly the AC timing parameters and addressing 5359c1c21a0SAneesh V information. This data is useful for drivers handling 5369c1c21a0SAneesh V DDR SDRAM controllers. 5379c1c21a0SAneesh V 538511cbce2SChristoph Hellwigconfig IRQ_POLL 539511cbce2SChristoph Hellwig bool "IRQ polling library" 540511cbce2SChristoph Hellwig help 541511cbce2SChristoph Hellwig Helper library to poll interrupt mitigation using polling. 542511cbce2SChristoph Hellwig 543d9c46b18SDmitry Kasatkinconfig MPILIB 5442e5f094bSDmitry Kasatkin tristate 545c6df4b17SDavid Miller select CLZ_TAB 546d9c46b18SDmitry Kasatkin help 547d9c46b18SDmitry Kasatkin Multiprecision maths library from GnuPG. 548d9c46b18SDmitry Kasatkin It is used to implement RSA digital signature verification, 549d9c46b18SDmitry Kasatkin which is used by IMA/EVM digital signature extension. 550d9c46b18SDmitry Kasatkin 5515e8898e9SDmitry Kasatkinconfig SIGNATURE 5522e5f094bSDmitry Kasatkin tristate 5530d1f64f6SDmitry Kasatkin depends on KEYS 5540d1f64f6SDmitry Kasatkin select CRYPTO 555be440ec7SDmitry Kasatkin select CRYPTO_SHA1 556051dbb91SDmitry Kasatkin select MPILIB 557051dbb91SDmitry Kasatkin help 558051dbb91SDmitry Kasatkin Digital signature verification. Currently only RSA is supported. 559051dbb91SDmitry Kasatkin Implementation is done using GnuPG MPI library 560051dbb91SDmitry Kasatkin 561ab253839SDavid Daney# 562ab253839SDavid Daney# libfdt files, only selected if needed. 563ab253839SDavid Daney# 564ab253839SDavid Daneyconfig LIBFDT 565ab253839SDavid Daney bool 566ab253839SDavid Daney 567a77ad6eaSDavid Howellsconfig OID_REGISTRY 568a77ad6eaSDavid Howells tristate 569a77ad6eaSDavid Howells help 570a77ad6eaSDavid Howells Enable fast lookup object identifier registry. 571a77ad6eaSDavid Howells 5720635eb8aSMatthew Garrettconfig UCS2_STRING 5730635eb8aSMatthew Garrett tristate 5740635eb8aSMatthew Garrett 575ee89bd6bSGeert Uytterhoevensource "lib/fonts/Kconfig" 576ee89bd6bSGeert Uytterhoeven 577f8bcbe62SRobert Jarzmikconfig SG_SPLIT 578f8bcbe62SRobert Jarzmik def_bool n 579f8bcbe62SRobert Jarzmik help 5807f7e92f7SGeert Uytterhoeven Provides a helper to split scatterlists into chunks, each chunk being 5817f7e92f7SGeert Uytterhoeven a scatterlist. This should be selected by a driver or an API which 5827f7e92f7SGeert Uytterhoeven whishes to split a scatterlist amongst multiple DMA channels. 583f8bcbe62SRobert Jarzmik 5849b1d6c89SMing Linconfig SG_POOL 5859b1d6c89SMing Lin def_bool n 5869b1d6c89SMing Lin help 5879b1d6c89SMing Lin Provides a helper to allocate chained scatterlists. This should be 5889b1d6c89SMing Lin selected by a driver or an API which whishes to allocate chained 5899b1d6c89SMing Lin scatterlist. 5909b1d6c89SMing Lin 591308c09f1SLaura Abbott# 592308c09f1SLaura Abbott# sg chaining option 593308c09f1SLaura Abbott# 594308c09f1SLaura Abbott 595308c09f1SLaura Abbottconfig ARCH_HAS_SG_CHAIN 596308c09f1SLaura Abbott def_bool n 597308c09f1SLaura Abbott 59861031952SRoss Zwislerconfig ARCH_HAS_PMEM_API 59961031952SRoss Zwisler bool 60061031952SRoss Zwisler 6010aed55afSDan Williamsconfig ARCH_HAS_UACCESS_FLUSHCACHE 6020aed55afSDan Williams bool 6030aed55afSDan Williams 604cd11016eSAlexander Potapenkoconfig STACKDEPOT 605cd11016eSAlexander Potapenko bool 606cd11016eSAlexander Potapenko select STACKTRACE 607cd11016eSAlexander Potapenko 60888459642SOmar Sandovalconfig SBITMAP 60988459642SOmar Sandoval bool 61088459642SOmar Sandoval 61144091d29SJiri Pirkoconfig PARMAN 6129d25af69SGeert Uytterhoeven tristate "parman" if COMPILE_TEST 61344091d29SJiri Pirko 614cf4a7207SChris Wilsonconfig PRIME_NUMBERS 61564a57719SDave Airlie tristate 616cf4a7207SChris Wilson 61703270c13SMatthew Wilcoxconfig STRING_SELFTEST 618d6b28e09SGeert Uytterhoeven tristate "Test string functions" 61903270c13SMatthew Wilcox 6202de4ff7bSThomas Grafendmenu 621b35cd988SPalmer Dabbelt 622b35cd988SPalmer Dabbeltconfig GENERIC_ASHLDI3 623b35cd988SPalmer Dabbelt bool 624b35cd988SPalmer Dabbelt 625b35cd988SPalmer Dabbeltconfig GENERIC_ASHRDI3 626b35cd988SPalmer Dabbelt bool 627b35cd988SPalmer Dabbelt 628b35cd988SPalmer Dabbeltconfig GENERIC_LSHRDI3 629b35cd988SPalmer Dabbelt bool 630b35cd988SPalmer Dabbelt 631b35cd988SPalmer Dabbeltconfig GENERIC_MULDI3 632b35cd988SPalmer Dabbelt bool 633b35cd988SPalmer Dabbelt 634b35cd988SPalmer Dabbeltconfig GENERIC_CMPDI2 635b35cd988SPalmer Dabbelt bool 636b35cd988SPalmer Dabbelt 637b35cd988SPalmer Dabbeltconfig GENERIC_UCMPDI2 638b35cd988SPalmer Dabbelt bool 639