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 help 70 This option is only needed if a module that's not in the 71 kernel tree needs to calculate CRC checks for use with the 72 SCSI data integrity subsystem. 73 74config CRC_ITU_T 75 tristate "CRC ITU-T V.41 functions" 76 help 77 This option is provided for the case where no in-kernel-tree 78 modules require CRC ITU-T V.41 functions, but a module built outside 79 the kernel tree does. Such modules that use library CRC ITU-T V.41 80 functions require M here. 81 82config CRC32 83 tristate "CRC32/CRC32c functions" 84 default y 85 select BITREVERSE 86 help 87 This option is provided for the case where no in-kernel-tree 88 modules require CRC32/CRC32c functions, but a module built outside 89 the kernel tree does. Such modules that use library CRC32/CRC32c 90 functions require M here. 91 92config CRC32_SELFTEST 93 bool "CRC32 perform self test on init" 94 default n 95 depends on CRC32 96 help 97 This option enables the CRC32 library functions to perform a 98 self test on initialization. The self test computes crc32_le 99 and crc32_be over byte strings with random alignment and length 100 and computes the total elapsed time and number of bytes processed. 101 102choice 103 prompt "CRC32 implementation" 104 depends on CRC32 105 default CRC32_SLICEBY8 106 help 107 This option allows a kernel builder to override the default choice 108 of CRC32 algorithm. Choose the default ("slice by 8") unless you 109 know that you need one of the others. 110 111config CRC32_SLICEBY8 112 bool "Slice by 8 bytes" 113 help 114 Calculate checksum 8 bytes at a time with a clever slicing algorithm. 115 This is the fastest algorithm, but comes with a 8KiB lookup table. 116 Most modern processors have enough cache to hold this table without 117 thrashing the cache. 118 119 This is the default implementation choice. Choose this one unless 120 you have a good reason not to. 121 122config CRC32_SLICEBY4 123 bool "Slice by 4 bytes" 124 help 125 Calculate checksum 4 bytes at a time with a clever slicing algorithm. 126 This is a bit slower than slice by 8, but has a smaller 4KiB lookup 127 table. 128 129 Only choose this option if you know what you are doing. 130 131config CRC32_SARWATE 132 bool "Sarwate's Algorithm (one byte at a time)" 133 help 134 Calculate checksum a byte at a time using Sarwate's algorithm. This 135 is not particularly fast, but has a small 256 byte lookup table. 136 137 Only choose this option if you know what you are doing. 138 139config CRC32_BIT 140 bool "Classic Algorithm (one bit at a time)" 141 help 142 Calculate checksum one bit at a time. This is VERY slow, but has 143 no lookup table. This is provided as a debugging option. 144 145 Only choose this option if you are debugging crc32. 146 147endchoice 148 149config CRC7 150 tristate "CRC7 functions" 151 help 152 This option is provided for the case where no in-kernel-tree 153 modules require CRC7 functions, but a module built outside 154 the kernel tree does. Such modules that use library CRC7 155 functions require M here. 156 157config LIBCRC32C 158 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" 159 select CRYPTO 160 select CRYPTO_CRC32C 161 help 162 This option is provided for the case where no in-kernel-tree 163 modules require CRC32c functions, but a module built outside the 164 kernel tree does. Such modules that use library CRC32c functions 165 require M here. See Castagnoli93. 166 Module will be libcrc32c. 167 168config CRC8 169 tristate "CRC8 function" 170 help 171 This option provides CRC8 function. Drivers may select this 172 when they need to do cyclic redundancy check according CRC8 173 algorithm. Module will be called crc8. 174 175config AUDIT_GENERIC 176 bool 177 depends on AUDIT && !AUDIT_ARCH 178 default y 179 180# 181# compression support is select'ed if needed 182# 183config ZLIB_INFLATE 184 tristate 185 186config ZLIB_DEFLATE 187 tristate 188 189config LZO_COMPRESS 190 tristate 191 192config LZO_DECOMPRESS 193 tristate 194 195config LZ4_COMPRESS 196 tristate 197 198config LZ4HC_COMPRESS 199 tristate 200 201config LZ4_DECOMPRESS 202 tristate 203 204source "lib/xz/Kconfig" 205 206# 207# These all provide a common interface (hence the apparent duplication with 208# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) 209# 210config DECOMPRESS_GZIP 211 select ZLIB_INFLATE 212 tristate 213 214config DECOMPRESS_BZIP2 215 tristate 216 217config DECOMPRESS_LZMA 218 tristate 219 220config DECOMPRESS_XZ 221 select XZ_DEC 222 tristate 223 224config DECOMPRESS_LZO 225 select LZO_DECOMPRESS 226 tristate 227 228config DECOMPRESS_LZ4 229 select LZ4_DECOMPRESS 230 tristate 231 232# 233# Generic allocator support is selected if needed 234# 235config GENERIC_ALLOCATOR 236 boolean 237 238# 239# reed solomon support is select'ed if needed 240# 241config REED_SOLOMON 242 tristate 243 244config REED_SOLOMON_ENC8 245 boolean 246 247config REED_SOLOMON_DEC8 248 boolean 249 250config REED_SOLOMON_ENC16 251 boolean 252 253config REED_SOLOMON_DEC16 254 boolean 255 256# 257# BCH support is selected if needed 258# 259config BCH 260 tristate 261 262config BCH_CONST_PARAMS 263 boolean 264 help 265 Drivers may select this option to force specific constant 266 values for parameters 'm' (Galois field order) and 't' 267 (error correction capability). Those specific values must 268 be set by declaring default values for symbols BCH_CONST_M 269 and BCH_CONST_T. 270 Doing so will enable extra compiler optimizations, 271 improving encoding and decoding performance up to 2x for 272 usual (m,t) values (typically such that m*t < 200). 273 When this option is selected, the BCH library supports 274 only a single (m,t) configuration. This is mainly useful 275 for NAND flash board drivers requiring known, fixed BCH 276 parameters. 277 278config BCH_CONST_M 279 int 280 range 5 15 281 help 282 Constant value for Galois field order 'm'. If 'k' is the 283 number of data bits to protect, 'm' should be chosen such 284 that (k + m*t) <= 2**m - 1. 285 Drivers should declare a default value for this symbol if 286 they select option BCH_CONST_PARAMS. 287 288config BCH_CONST_T 289 int 290 help 291 Constant value for error correction capability in bits 't'. 292 Drivers should declare a default value for this symbol if 293 they select option BCH_CONST_PARAMS. 294 295# 296# Textsearch support is select'ed if needed 297# 298config TEXTSEARCH 299 boolean 300 301config TEXTSEARCH_KMP 302 tristate 303 304config TEXTSEARCH_BM 305 tristate 306 307config TEXTSEARCH_FSM 308 tristate 309 310config BTREE 311 boolean 312 313config HAS_IOMEM 314 boolean 315 depends on !NO_IOMEM 316 select GENERIC_IO 317 default y 318 319config HAS_IOPORT 320 boolean 321 depends on HAS_IOMEM && !NO_IOPORT 322 default y 323 324config HAS_DMA 325 boolean 326 depends on !NO_DMA 327 default y 328 329config CHECK_SIGNATURE 330 bool 331 332config CPUMASK_OFFSTACK 333 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS 334 help 335 Use dynamic allocation for cpumask_var_t, instead of putting 336 them on the stack. This is a bit more expensive, but avoids 337 stack overflow. 338 339config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS 340 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS 341 depends on BROKEN 342 343config CPU_RMAP 344 bool 345 depends on SMP 346 347config DQL 348 bool 349 350# 351# Netlink attribute parsing support is select'ed if needed 352# 353config NLATTR 354 bool 355 356# 357# Generic 64-bit atomic support is selected if needed 358# 359config GENERIC_ATOMIC64 360 bool 361 362config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 363 def_bool y if GENERIC_ATOMIC64 364 365config LRU_CACHE 366 tristate 367 368config AVERAGE 369 bool "Averaging functions" 370 help 371 This option is provided for the case where no in-kernel-tree 372 modules require averaging functions, but a module built outside 373 the kernel tree does. Such modules that use library averaging 374 functions require Y here. 375 376 If unsure, say N. 377 378config CLZ_TAB 379 bool 380 381config CORDIC 382 tristate "CORDIC algorithm" 383 help 384 This option provides an implementation of the CORDIC algorithm; 385 calculations are in fixed point. Module will be called cordic. 386 387config DDR 388 bool "JEDEC DDR data" 389 help 390 Data from JEDEC specs for DDR SDRAM memories, 391 particularly the AC timing parameters and addressing 392 information. This data is useful for drivers handling 393 DDR SDRAM controllers. 394 395config MPILIB 396 tristate 397 select CLZ_TAB 398 help 399 Multiprecision maths library from GnuPG. 400 It is used to implement RSA digital signature verification, 401 which is used by IMA/EVM digital signature extension. 402 403config SIGNATURE 404 tristate 405 depends on KEYS && CRYPTO 406 select CRYPTO_SHA1 407 select MPILIB 408 help 409 Digital signature verification. Currently only RSA is supported. 410 Implementation is done using GnuPG MPI library 411 412# 413# libfdt files, only selected if needed. 414# 415config LIBFDT 416 bool 417 418config OID_REGISTRY 419 tristate 420 help 421 Enable fast lookup object identifier registry. 422 423config UCS2_STRING 424 tristate 425 426source "lib/fonts/Kconfig" 427 428endmenu 429