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 195source "lib/xz/Kconfig" 196 197# 198# These all provide a common interface (hence the apparent duplication with 199# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) 200# 201config DECOMPRESS_GZIP 202 select ZLIB_INFLATE 203 tristate 204 205config DECOMPRESS_BZIP2 206 tristate 207 208config DECOMPRESS_LZMA 209 tristate 210 211config DECOMPRESS_XZ 212 select XZ_DEC 213 tristate 214 215config DECOMPRESS_LZO 216 select LZO_DECOMPRESS 217 tristate 218 219# 220# Generic allocator support is selected if needed 221# 222config GENERIC_ALLOCATOR 223 boolean 224 225# 226# reed solomon support is select'ed if needed 227# 228config REED_SOLOMON 229 tristate 230 231config REED_SOLOMON_ENC8 232 boolean 233 234config REED_SOLOMON_DEC8 235 boolean 236 237config REED_SOLOMON_ENC16 238 boolean 239 240config REED_SOLOMON_DEC16 241 boolean 242 243# 244# BCH support is selected if needed 245# 246config BCH 247 tristate 248 249config BCH_CONST_PARAMS 250 boolean 251 help 252 Drivers may select this option to force specific constant 253 values for parameters 'm' (Galois field order) and 't' 254 (error correction capability). Those specific values must 255 be set by declaring default values for symbols BCH_CONST_M 256 and BCH_CONST_T. 257 Doing so will enable extra compiler optimizations, 258 improving encoding and decoding performance up to 2x for 259 usual (m,t) values (typically such that m*t < 200). 260 When this option is selected, the BCH library supports 261 only a single (m,t) configuration. This is mainly useful 262 for NAND flash board drivers requiring known, fixed BCH 263 parameters. 264 265config BCH_CONST_M 266 int 267 range 5 15 268 help 269 Constant value for Galois field order 'm'. If 'k' is the 270 number of data bits to protect, 'm' should be chosen such 271 that (k + m*t) <= 2**m - 1. 272 Drivers should declare a default value for this symbol if 273 they select option BCH_CONST_PARAMS. 274 275config BCH_CONST_T 276 int 277 help 278 Constant value for error correction capability in bits 't'. 279 Drivers should declare a default value for this symbol if 280 they select option BCH_CONST_PARAMS. 281 282# 283# Textsearch support is select'ed if needed 284# 285config TEXTSEARCH 286 boolean 287 288config TEXTSEARCH_KMP 289 tristate 290 291config TEXTSEARCH_BM 292 tristate 293 294config TEXTSEARCH_FSM 295 tristate 296 297config BTREE 298 boolean 299 300config HAS_IOMEM 301 boolean 302 depends on !NO_IOMEM 303 select GENERIC_IO 304 default y 305 306config HAS_IOPORT 307 boolean 308 depends on HAS_IOMEM && !NO_IOPORT 309 default y 310 311config HAS_DMA 312 boolean 313 depends on !NO_DMA 314 default y 315 316config CHECK_SIGNATURE 317 bool 318 319config CPUMASK_OFFSTACK 320 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS 321 help 322 Use dynamic allocation for cpumask_var_t, instead of putting 323 them on the stack. This is a bit more expensive, but avoids 324 stack overflow. 325 326config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS 327 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS 328 depends on BROKEN 329 330config CPU_RMAP 331 bool 332 depends on SMP 333 334config DQL 335 bool 336 337# 338# Netlink attribute parsing support is select'ed if needed 339# 340config NLATTR 341 bool 342 343# 344# Generic 64-bit atomic support is selected if needed 345# 346config GENERIC_ATOMIC64 347 bool 348 349config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 350 def_bool y if GENERIC_ATOMIC64 351 352config LRU_CACHE 353 tristate 354 355config AVERAGE 356 bool "Averaging functions" 357 help 358 This option is provided for the case where no in-kernel-tree 359 modules require averaging functions, but a module built outside 360 the kernel tree does. Such modules that use library averaging 361 functions require Y here. 362 363 If unsure, say N. 364 365config CLZ_TAB 366 bool 367 368config CORDIC 369 tristate "CORDIC algorithm" 370 help 371 This option provides an implementation of the CORDIC algorithm; 372 calculations are in fixed point. Module will be called cordic. 373 374config DDR 375 bool "JEDEC DDR data" 376 help 377 Data from JEDEC specs for DDR SDRAM memories, 378 particularly the AC timing parameters and addressing 379 information. This data is useful for drivers handling 380 DDR SDRAM controllers. 381 382config MPILIB 383 tristate 384 select CLZ_TAB 385 help 386 Multiprecision maths library from GnuPG. 387 It is used to implement RSA digital signature verification, 388 which is used by IMA/EVM digital signature extension. 389 390config SIGNATURE 391 tristate 392 depends on KEYS && CRYPTO 393 select CRYPTO_SHA1 394 select MPILIB 395 help 396 Digital signature verification. Currently only RSA is supported. 397 Implementation is done using GnuPG MPI library 398 399# 400# libfdt files, only selected if needed. 401# 402config LIBFDT 403 bool 404 405config OID_REGISTRY 406 tristate 407 help 408 Enable fast lookup object identifier registry. 409 410config UCS2_STRING 411 tristate 412 413source "lib/fonts/Kconfig" 414 415endmenu 416