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