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_STRNCPY_FROM_USER
  20         bool
  21
  22 config GENERIC_STRNLEN_USER
  23         bool
  24
  25 config GENERIC_NET_UTILS
  26         bool
  27
  28 config GENERIC_FIND_FIRST_BIT
  29         bool
  30
  31 config NO_GENERIC_PCI_IOPORT_MAP
  32         bool
  33
  34 config GENERIC_PCI_IOMAP
  35         bool
  36
  37 config GENERIC_IOMAP
  38         bool
  39         select GENERIC_PCI_IOMAP
  40
  41 config GENERIC_IO
  42         boolean
  43         default n
  44
  45 config STMP_DEVICE
  46         bool
  47
  48 config PERCPU_RWSEM
  49         boolean
  50
  51 config 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
  59 config 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
  67 config CRC_T10DIF
  68         tristate "CRC calculation for the T10 Data Integrity Field"
  69         select CRYPTO
  70         select CRYPTO_CRCT10DIF
  71         help
  72           This option is only needed if a module that's not in the
  73           kernel tree needs to calculate CRC checks for use with the
  74           SCSI data integrity subsystem.
  75
  76 config CRC_ITU_T
  77         tristate "CRC ITU-T V.41 functions"
  78         help
  79           This option is provided for the case where no in-kernel-tree
  80           modules require CRC ITU-T V.41 functions, but a module built outside
  81           the kernel tree does. Such modules that use library CRC ITU-T V.41
  82           functions require M here.
  83
  84 config CRC32
  85         tristate "CRC32/CRC32c functions"
  86         default y
  87         select BITREVERSE
  88         help
  89           This option is provided for the case where no in-kernel-tree
  90           modules require CRC32/CRC32c functions, but a module built outside
  91           the kernel tree does. Such modules that use library CRC32/CRC32c
  92           functions require M here.
  93
  94 config CRC32_SELFTEST
  95         bool "CRC32 perform self test on init"
  96         default n
  97         depends on CRC32
  98         help
  99           This option enables the CRC32 library functions to perform a
 100           self test on initialization. The self test computes crc32_le
 101           and crc32_be over byte strings with random alignment and length
 102           and computes the total elapsed time and number of bytes processed.
 103
 104 choice
 105         prompt "CRC32 implementation"
 106         depends on CRC32
 107         default CRC32_SLICEBY8
 108         help
 109           This option allows a kernel builder to override the default choice
 110           of CRC32 algorithm.  Choose the default ("slice by 8") unless you
 111           know that you need one of the others.
 112
 113 config CRC32_SLICEBY8
 114         bool "Slice by 8 bytes"
 115         help
 116           Calculate checksum 8 bytes at a time with a clever slicing algorithm.
 117           This is the fastest algorithm, but comes with a 8KiB lookup table.
 118           Most modern processors have enough cache to hold this table without
 119           thrashing the cache.
 120
 121           This is the default implementation choice.  Choose this one unless
 122           you have a good reason not to.
 123
 124 config CRC32_SLICEBY4
 125         bool "Slice by 4 bytes"
 126         help
 127           Calculate checksum 4 bytes at a time with a clever slicing algorithm.
 128           This is a bit slower than slice by 8, but has a smaller 4KiB lookup
 129           table.
 130
 131           Only choose this option if you know what you are doing.
 132
 133 config CRC32_SARWATE
 134         bool "Sarwate's Algorithm (one byte at a time)"
 135         help
 136           Calculate checksum a byte at a time using Sarwate's algorithm.  This
 137           is not particularly fast, but has a small 256 byte lookup table.
 138
 139           Only choose this option if you know what you are doing.
 140
 141 config CRC32_BIT
 142         bool "Classic Algorithm (one bit at a time)"
 143         help
 144           Calculate checksum one bit at a time.  This is VERY slow, but has
 145           no lookup table.  This is provided as a debugging option.
 146
 147           Only choose this option if you are debugging crc32.
 148
 149 endchoice
 150
 151 config CRC7
 152         tristate "CRC7 functions"
 153         help
 154           This option is provided for the case where no in-kernel-tree
 155           modules require CRC7 functions, but a module built outside
 156           the kernel tree does. Such modules that use library CRC7
 157           functions require M here.
 158
 159 config LIBCRC32C
 160         tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
 161         select CRYPTO
 162         select CRYPTO_CRC32C
 163         help
 164           This option is provided for the case where no in-kernel-tree
 165           modules require CRC32c functions, but a module built outside the
 166           kernel tree does. Such modules that use library CRC32c functions
 167           require M here.  See Castagnoli93.
 168           Module will be libcrc32c.
 169
 170 config CRC8
 171         tristate "CRC8 function"
 172         help
 173           This option provides CRC8 function. Drivers may select this
 174           when they need to do cyclic redundancy check according CRC8
 175           algorithm. Module will be called crc8.
 176
 177 config AUDIT_GENERIC
 178         bool
 179         depends on AUDIT && !AUDIT_ARCH
 180         default y
 181
 182 #
 183 # compression support is select'ed if needed
 184 #
 185 config ZLIB_INFLATE
 186         tristate
 187
 188 config ZLIB_DEFLATE
 189         tristate
 190
 191 config LZO_COMPRESS
 192         tristate
 193
 194 config LZO_DECOMPRESS
 195         tristate
 196
 197 source "lib/xz/Kconfig"
 198
 199 #
 200 # These all provide a common interface (hence the apparent duplication with
 201 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
 202 #
 203 config DECOMPRESS_GZIP
 204         select ZLIB_INFLATE
 205         tristate
 206
 207 config DECOMPRESS_BZIP2
 208         tristate
 209
 210 config DECOMPRESS_LZMA
 211         tristate
 212
 213 config DECOMPRESS_XZ
 214         select XZ_DEC
 215         tristate
 216
 217 config DECOMPRESS_LZO
 218         select LZO_DECOMPRESS
 219         tristate
 220
 221 #
 222 # Generic allocator support is selected if needed
 223 #
 224 config GENERIC_ALLOCATOR
 225         boolean
 226
 227 #
 228 # reed solomon support is select'ed if needed
 229 #
 230 config REED_SOLOMON
 231         tristate
 232
 233 config REED_SOLOMON_ENC8
 234         boolean
 235
 236 config REED_SOLOMON_DEC8
 237         boolean
 238
 239 config REED_SOLOMON_ENC16
 240         boolean
 241
 242 config REED_SOLOMON_DEC16
 243         boolean
 244
 245 #
 246 # BCH support is selected if needed
 247 #
 248 config BCH
 249         tristate
 250
 251 config BCH_CONST_PARAMS
 252         boolean
 253         help
 254           Drivers may select this option to force specific constant
 255           values for parameters 'm' (Galois field order) and 't'
 256           (error correction capability). Those specific values must
 257           be set by declaring default values for symbols BCH_CONST_M
 258           and BCH_CONST_T.
 259           Doing so will enable extra compiler optimizations,
 260           improving encoding and decoding performance up to 2x for
 261           usual (m,t) values (typically such that m*t < 200).
 262           When this option is selected, the BCH library supports
 263           only a single (m,t) configuration. This is mainly useful
 264           for NAND flash board drivers requiring known, fixed BCH
 265           parameters.
 266
 267 config BCH_CONST_M
 268         int
 269         range 5 15
 270         help
 271           Constant value for Galois field order 'm'. If 'k' is the
 272           number of data bits to protect, 'm' should be chosen such
 273           that (k + m*t) <= 2**m - 1.
 274           Drivers should declare a default value for this symbol if
 275           they select option BCH_CONST_PARAMS.
 276
 277 config BCH_CONST_T
 278         int
 279         help
 280           Constant value for error correction capability in bits 't'.
 281           Drivers should declare a default value for this symbol if
 282           they select option BCH_CONST_PARAMS.
 283
 284 #
 285 # Textsearch support is select'ed if needed
 286 #
 287 config TEXTSEARCH
 288         boolean
 289
 290 config TEXTSEARCH_KMP
 291         tristate
 292
 293 config TEXTSEARCH_BM
 294         tristate
 295
 296 config TEXTSEARCH_FSM
 297         tristate
 298
 299 config BTREE
 300         boolean
 301
 302 config HAS_IOMEM
 303         boolean
 304         depends on !NO_IOMEM
 305         select GENERIC_IO
 306         default y
 307
 308 config HAS_IOPORT
 309         boolean
 310         depends on HAS_IOMEM && !NO_IOPORT
 311         default y
 312
 313 config HAS_DMA
 314         boolean
 315         depends on !NO_DMA
 316         default y
 317
 318 config CHECK_SIGNATURE
 319         bool
 320
 321 config CPUMASK_OFFSTACK
 322         bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
 323         help
 324           Use dynamic allocation for cpumask_var_t, instead of putting
 325           them on the stack.  This is a bit more expensive, but avoids
 326           stack overflow.
 327
 328 config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
 329        bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
 330        depends on BROKEN
 331
 332 config CPU_RMAP
 333         bool
 334         depends on SMP
 335
 336 config DQL
 337         bool
 338
 339 #
 340 # Netlink attribute parsing support is select'ed if needed
 341 #
 342 config NLATTR
 343         bool
 344
 345 #
 346 # Generic 64-bit atomic support is selected if needed
 347 #
 348 config GENERIC_ATOMIC64
 349        bool
 350
 351 config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
 352         def_bool y if GENERIC_ATOMIC64
 353
 354 config LRU_CACHE
 355         tristate
 356
 357 config AVERAGE
 358         bool "Averaging functions"
 359         help
 360           This option is provided for the case where no in-kernel-tree
 361           modules require averaging functions, but a module built outside
 362           the kernel tree does. Such modules that use library averaging
 363           functions require Y here.
 364
 365           If unsure, say N.
 366
 367 config CLZ_TAB
 368         bool
 369
 370 config CORDIC
 371         tristate "CORDIC algorithm"
 372         help
 373           This option provides an implementation of the CORDIC algorithm;
 374           calculations are in fixed point. Module will be called cordic.
 375
 376 config DDR
 377         bool "JEDEC DDR data"
 378         help
 379           Data from JEDEC specs for DDR SDRAM memories,
 380           particularly the AC timing parameters and addressing
 381           information. This data is useful for drivers handling
 382           DDR SDRAM controllers.
 383
 384 config MPILIB
 385         tristate
 386         select CLZ_TAB
 387         help
 388           Multiprecision maths library from GnuPG.
 389           It is used to implement RSA digital signature verification,
 390           which is used by IMA/EVM digital signature extension.
 391
 392 config SIGNATURE
 393         tristate
 394         depends on KEYS && CRYPTO
 395         select CRYPTO_SHA1
 396         select MPILIB
 397         help
 398           Digital signature verification. Currently only RSA is supported.
 399           Implementation is done using GnuPG MPI library
 400
 401 #
 402 # libfdt files, only selected if needed.
 403 #
 404 config LIBFDT
 405         bool
 406
 407 config OID_REGISTRY
 408         tristate
 409         help
 410           Enable fast lookup object identifier registry.
 411
 412 config UCS2_STRING
 413         tristate
 414
 415 source "lib/fonts/Kconfig"
 416
 417 endmenu