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