lib/Kconfig

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