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 197source "lib/xz/Kconfig" 198 199# 200# These all provide a common interface (hence the apparent duplication with 201# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) 202# 203config DECOMPRESS_GZIP 204 select ZLIB_INFLATE 205 tristate 206 207config DECOMPRESS_BZIP2 208 tristate 209 210config DECOMPRESS_LZMA 211 tristate 212 213config DECOMPRESS_XZ 214 select XZ_DEC 215 tristate 216 217config DECOMPRESS_LZO 218 select LZO_DECOMPRESS 219 tristate 220 221# 222# Generic allocator support is selected if needed 223# 224config GENERIC_ALLOCATOR 225 boolean 226 227# 228# reed solomon support is select'ed if needed 229# 230config REED_SOLOMON 231 tristate 232 233config REED_SOLOMON_ENC8 234 boolean 235 236config REED_SOLOMON_DEC8 237 boolean 238 239config REED_SOLOMON_ENC16 240 boolean 241 242config REED_SOLOMON_DEC16 243 boolean 244 245# 246# BCH support is selected if needed 247# 248config BCH 249 tristate 250 251config BCH_CONST_PARAMS 252 boolean 253 help 254 Drivers may select this option to force specific constant 255 values for parameters 'm' (Galois field order) and 't' 256 (error correction capability). Those specific values must 257 be set by declaring default values for symbols BCH_CONST_M 258 and BCH_CONST_T. 259 Doing so will enable extra compiler optimizations, 260 improving encoding and decoding performance up to 2x for 261 usual (m,t) values (typically such that m*t < 200). 262 When this option is selected, the BCH library supports 263 only a single (m,t) configuration. This is mainly useful 264 for NAND flash board drivers requiring known, fixed BCH 265 parameters. 266 267config BCH_CONST_M 268 int 269 range 5 15 270 help 271 Constant value for Galois field order 'm'. If 'k' is the 272 number of data bits to protect, 'm' should be chosen such 273 that (k + m*t) <= 2**m - 1. 274 Drivers should declare a default value for this symbol if 275 they select option BCH_CONST_PARAMS. 276 277config BCH_CONST_T 278 int 279 help 280 Constant value for error correction capability in bits 't'. 281 Drivers should declare a default value for this symbol if 282 they select option BCH_CONST_PARAMS. 283 284# 285# Textsearch support is select'ed if needed 286# 287config TEXTSEARCH 288 boolean 289 290config TEXTSEARCH_KMP 291 tristate 292 293config TEXTSEARCH_BM 294 tristate 295 296config TEXTSEARCH_FSM 297 tristate 298 299config BTREE 300 boolean 301 302config HAS_IOMEM 303 boolean 304 depends on !NO_IOMEM 305 select GENERIC_IO 306 default y 307 308config HAS_IOPORT 309 boolean 310 depends on HAS_IOMEM && !NO_IOPORT 311 default y 312 313config HAS_DMA 314 boolean 315 depends on !NO_DMA 316 default y 317 318config CHECK_SIGNATURE 319 bool 320 321config CPUMASK_OFFSTACK 322 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS 323 help 324 Use dynamic allocation for cpumask_var_t, instead of putting 325 them on the stack. This is a bit more expensive, but avoids 326 stack overflow. 327 328config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS 329 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS 330 depends on BROKEN 331 332config CPU_RMAP 333 bool 334 depends on SMP 335 336config DQL 337 bool 338 339# 340# Netlink attribute parsing support is select'ed if needed 341# 342config NLATTR 343 bool 344 345# 346# Generic 64-bit atomic support is selected if needed 347# 348config GENERIC_ATOMIC64 349 bool 350 351config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 352 def_bool y if GENERIC_ATOMIC64 353 354config LRU_CACHE 355 tristate 356 357config AVERAGE 358 bool "Averaging functions" 359 help 360 This option is provided for the case where no in-kernel-tree 361 modules require averaging functions, but a module built outside 362 the kernel tree does. Such modules that use library averaging 363 functions require Y here. 364 365 If unsure, say N. 366 367config CLZ_TAB 368 bool 369 370config CORDIC 371 tristate "CORDIC algorithm" 372 help 373 This option provides an implementation of the CORDIC algorithm; 374 calculations are in fixed point. Module will be called cordic. 375 376config DDR 377 bool "JEDEC DDR data" 378 help 379 Data from JEDEC specs for DDR SDRAM memories, 380 particularly the AC timing parameters and addressing 381 information. This data is useful for drivers handling 382 DDR SDRAM controllers. 383 384config MPILIB 385 tristate 386 select CLZ_TAB 387 help 388 Multiprecision maths library from GnuPG. 389 It is used to implement RSA digital signature verification, 390 which is used by IMA/EVM digital signature extension. 391 392config SIGNATURE 393 tristate 394 depends on KEYS && CRYPTO 395 select CRYPTO_SHA1 396 select MPILIB 397 help 398 Digital signature verification. Currently only RSA is supported. 399 Implementation is done using GnuPG MPI library 400 401# 402# libfdt files, only selected if needed. 403# 404config LIBFDT 405 bool 406 407config OID_REGISTRY 408 tristate 409 help 410 Enable fast lookup object identifier registry. 411 412config UCS2_STRING 413 tristate 414 415source "lib/fonts/Kconfig" 416 417endmenu 418