1# 2# Library configuration 3# 4 5config BINARY_PRINTF 6 def_bool n 7 8menu "Library routines" 9 10config RAID6_PQ 11 tristate 12 13config BITREVERSE 14 tristate 15 16config RATIONAL 17 boolean 18 19config GENERIC_STRNCPY_FROM_USER 20 bool 21 22config GENERIC_STRNLEN_USER 23 bool 24 25config GENERIC_NET_UTILS 26 bool 27 28config GENERIC_FIND_FIRST_BIT 29 bool 30 31config NO_GENERIC_PCI_IOPORT_MAP 32 bool 33 34config GENERIC_PCI_IOMAP 35 bool 36 37config GENERIC_IOMAP 38 bool 39 select GENERIC_PCI_IOMAP 40 41config GENERIC_IO 42 boolean 43 default n 44 45config STMP_DEVICE 46 bool 47 48config PERCPU_RWSEM 49 boolean 50 51config CRC_CCITT 52 tristate "CRC-CCITT functions" 53 help 54 This option is provided for the case where no in-kernel-tree 55 modules require CRC-CCITT functions, but a module built outside 56 the kernel tree does. Such modules that use library CRC-CCITT 57 functions require M here. 58 59config CRC16 60 tristate "CRC16 functions" 61 help 62 This option is provided for the case where no in-kernel-tree 63 modules require CRC16 functions, but a module built outside 64 the kernel tree does. Such modules that use library CRC16 65 functions require M here. 66 67config CRC_T10DIF 68 tristate "CRC calculation for the T10 Data Integrity Field" 69 select CRYPTO 70 select CRYPTO_CRCT10DIF 71 help 72 This option is only needed if a module that's not in the 73 kernel tree needs to calculate CRC checks for use with the 74 SCSI data integrity subsystem. 75 76config CRC_ITU_T 77 tristate "CRC ITU-T V.41 functions" 78 help 79 This option is provided for the case where no in-kernel-tree 80 modules require CRC ITU-T V.41 functions, but a module built outside 81 the kernel tree does. Such modules that use library CRC ITU-T V.41 82 functions require M here. 83 84config CRC32 85 tristate "CRC32/CRC32c functions" 86 default y 87 select BITREVERSE 88 help 89 This option is provided for the case where no in-kernel-tree 90 modules require CRC32/CRC32c functions, but a module built outside 91 the kernel tree does. Such modules that use library CRC32/CRC32c 92 functions require M here. 93 94config CRC32_SELFTEST 95 bool "CRC32 perform self test on init" 96 default n 97 depends on CRC32 98 help 99 This option enables the CRC32 library functions to perform a 100 self test on initialization. The self test computes crc32_le 101 and crc32_be over byte strings with random alignment and length 102 and computes the total elapsed time and number of bytes processed. 103 104choice 105 prompt "CRC32 implementation" 106 depends on CRC32 107 default CRC32_SLICEBY8 108 help 109 This option allows a kernel builder to override the default choice 110 of CRC32 algorithm. Choose the default ("slice by 8") unless you 111 know that you need one of the others. 112 113config CRC32_SLICEBY8 114 bool "Slice by 8 bytes" 115 help 116 Calculate checksum 8 bytes at a time with a clever slicing algorithm. 117 This is the fastest algorithm, but comes with a 8KiB lookup table. 118 Most modern processors have enough cache to hold this table without 119 thrashing the cache. 120 121 This is the default implementation choice. Choose this one unless 122 you have a good reason not to. 123 124config CRC32_SLICEBY4 125 bool "Slice by 4 bytes" 126 help 127 Calculate checksum 4 bytes at a time with a clever slicing algorithm. 128 This is a bit slower than slice by 8, but has a smaller 4KiB lookup 129 table. 130 131 Only choose this option if you know what you are doing. 132 133config CRC32_SARWATE 134 bool "Sarwate's Algorithm (one byte at a time)" 135 help 136 Calculate checksum a byte at a time using Sarwate's algorithm. This 137 is not particularly fast, but has a small 256 byte lookup table. 138 139 Only choose this option if you know what you are doing. 140 141config CRC32_BIT 142 bool "Classic Algorithm (one bit at a time)" 143 help 144 Calculate checksum one bit at a time. This is VERY slow, but has 145 no lookup table. This is provided as a debugging option. 146 147 Only choose this option if you are debugging crc32. 148 149endchoice 150 151config CRC7 152 tristate "CRC7 functions" 153 help 154 This option is provided for the case where no in-kernel-tree 155 modules require CRC7 functions, but a module built outside 156 the kernel tree does. Such modules that use library CRC7 157 functions require M here. 158 159config LIBCRC32C 160 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" 161 select CRYPTO 162 select CRYPTO_CRC32C 163 help 164 This option is provided for the case where no in-kernel-tree 165 modules require CRC32c functions, but a module built outside the 166 kernel tree does. Such modules that use library CRC32c functions 167 require M here. See Castagnoli93. 168 Module will be libcrc32c. 169 170config CRC8 171 tristate "CRC8 function" 172 help 173 This option provides CRC8 function. Drivers may select this 174 when they need to do cyclic redundancy check according CRC8 175 algorithm. Module will be called crc8. 176 177config AUDIT_GENERIC 178 bool 179 depends on AUDIT && !AUDIT_ARCH 180 default y 181 182# 183# compression support is select'ed if needed 184# 185config ZLIB_INFLATE 186 tristate 187 188config ZLIB_DEFLATE 189 tristate 190 191config LZO_COMPRESS 192 tristate 193 194config LZO_DECOMPRESS 195 tristate 196 197config LZ4_DECOMPRESS 198 tristate 199 200source "lib/xz/Kconfig" 201 202# 203# These all provide a common interface (hence the apparent duplication with 204# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) 205# 206config DECOMPRESS_GZIP 207 select ZLIB_INFLATE 208 tristate 209 210config DECOMPRESS_BZIP2 211 tristate 212 213config DECOMPRESS_LZMA 214 tristate 215 216config DECOMPRESS_XZ 217 select XZ_DEC 218 tristate 219 220config DECOMPRESS_LZO 221 select LZO_DECOMPRESS 222 tristate 223 224config DECOMPRESS_LZ4 225 select LZ4_DECOMPRESS 226 tristate 227 228# 229# Generic allocator support is selected if needed 230# 231config GENERIC_ALLOCATOR 232 boolean 233 234# 235# reed solomon support is select'ed if needed 236# 237config REED_SOLOMON 238 tristate 239 240config REED_SOLOMON_ENC8 241 boolean 242 243config REED_SOLOMON_DEC8 244 boolean 245 246config REED_SOLOMON_ENC16 247 boolean 248 249config REED_SOLOMON_DEC16 250 boolean 251 252# 253# BCH support is selected if needed 254# 255config BCH 256 tristate 257 258config BCH_CONST_PARAMS 259 boolean 260 help 261 Drivers may select this option to force specific constant 262 values for parameters 'm' (Galois field order) and 't' 263 (error correction capability). Those specific values must 264 be set by declaring default values for symbols BCH_CONST_M 265 and BCH_CONST_T. 266 Doing so will enable extra compiler optimizations, 267 improving encoding and decoding performance up to 2x for 268 usual (m,t) values (typically such that m*t < 200). 269 When this option is selected, the BCH library supports 270 only a single (m,t) configuration. This is mainly useful 271 for NAND flash board drivers requiring known, fixed BCH 272 parameters. 273 274config BCH_CONST_M 275 int 276 range 5 15 277 help 278 Constant value for Galois field order 'm'. If 'k' is the 279 number of data bits to protect, 'm' should be chosen such 280 that (k + m*t) <= 2**m - 1. 281 Drivers should declare a default value for this symbol if 282 they select option BCH_CONST_PARAMS. 283 284config BCH_CONST_T 285 int 286 help 287 Constant value for error correction capability in bits 't'. 288 Drivers should declare a default value for this symbol if 289 they select option BCH_CONST_PARAMS. 290 291# 292# Textsearch support is select'ed if needed 293# 294config TEXTSEARCH 295 boolean 296 297config TEXTSEARCH_KMP 298 tristate 299 300config TEXTSEARCH_BM 301 tristate 302 303config TEXTSEARCH_FSM 304 tristate 305 306config BTREE 307 boolean 308 309config HAS_IOMEM 310 boolean 311 depends on !NO_IOMEM 312 select GENERIC_IO 313 default y 314 315config HAS_IOPORT 316 boolean 317 depends on HAS_IOMEM && !NO_IOPORT 318 default y 319 320config HAS_DMA 321 boolean 322 depends on !NO_DMA 323 default y 324 325config CHECK_SIGNATURE 326 bool 327 328config CPUMASK_OFFSTACK 329 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS 330 help 331 Use dynamic allocation for cpumask_var_t, instead of putting 332 them on the stack. This is a bit more expensive, but avoids 333 stack overflow. 334 335config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS 336 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS 337 depends on BROKEN 338 339config CPU_RMAP 340 bool 341 depends on SMP 342 343config DQL 344 bool 345 346# 347# Netlink attribute parsing support is select'ed if needed 348# 349config NLATTR 350 bool 351 352# 353# Generic 64-bit atomic support is selected if needed 354# 355config GENERIC_ATOMIC64 356 bool 357 358config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 359 def_bool y if GENERIC_ATOMIC64 360 361config LRU_CACHE 362 tristate 363 364config AVERAGE 365 bool "Averaging functions" 366 help 367 This option is provided for the case where no in-kernel-tree 368 modules require averaging functions, but a module built outside 369 the kernel tree does. Such modules that use library averaging 370 functions require Y here. 371 372 If unsure, say N. 373 374config CLZ_TAB 375 bool 376 377config CORDIC 378 tristate "CORDIC algorithm" 379 help 380 This option provides an implementation of the CORDIC algorithm; 381 calculations are in fixed point. Module will be called cordic. 382 383config DDR 384 bool "JEDEC DDR data" 385 help 386 Data from JEDEC specs for DDR SDRAM memories, 387 particularly the AC timing parameters and addressing 388 information. This data is useful for drivers handling 389 DDR SDRAM controllers. 390 391config MPILIB 392 tristate 393 select CLZ_TAB 394 help 395 Multiprecision maths library from GnuPG. 396 It is used to implement RSA digital signature verification, 397 which is used by IMA/EVM digital signature extension. 398 399config SIGNATURE 400 tristate 401 depends on KEYS && CRYPTO 402 select CRYPTO_SHA1 403 select MPILIB 404 help 405 Digital signature verification. Currently only RSA is supported. 406 Implementation is done using GnuPG MPI library 407 408# 409# libfdt files, only selected if needed. 410# 411config LIBFDT 412 bool 413 414config OID_REGISTRY 415 tristate 416 help 417 Enable fast lookup object identifier registry. 418 419config UCS2_STRING 420 tristate 421 422source "lib/fonts/Kconfig" 423 424endmenu 425