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