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