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_FIND_FIRST_BIT
  23         bool
  24
  25 config NO_GENERIC_PCI_IOPORT_MAP
  26         bool
  27
  28 config GENERIC_PCI_IOMAP
  29         bool
  30
  31 config GENERIC_IOMAP
  32         bool
  33         select GENERIC_PCI_IOMAP
  34
  35 config GENERIC_IO
  36         boolean
  37         default n
  38
  39 config STMP_DEVICE
  40         bool
  41
  42 config CRC_CCITT
  43         tristate "CRC-CCITT functions"
  44         help
  45           This option is provided for the case where no in-kernel-tree
  46           modules require CRC-CCITT functions, but a module built outside
  47           the kernel tree does. Such modules that use library CRC-CCITT
  48           functions require M here.
  49
  50 config CRC16
  51         tristate "CRC16 functions"
  52         help
  53           This option is provided for the case where no in-kernel-tree
  54           modules require CRC16 functions, but a module built outside
  55           the kernel tree does. Such modules that use library CRC16
  56           functions require M here.
  57
  58 config CRC_T10DIF
  59         tristate "CRC calculation for the T10 Data Integrity Field"
  60         help
  61           This option is only needed if a module that's not in the
  62           kernel tree needs to calculate CRC checks for use with the
  63           SCSI data integrity subsystem.
  64
  65 config CRC_ITU_T
  66         tristate "CRC ITU-T V.41 functions"
  67         help
  68           This option is provided for the case where no in-kernel-tree
  69           modules require CRC ITU-T V.41 functions, but a module built outside
  70           the kernel tree does. Such modules that use library CRC ITU-T V.41
  71           functions require M here.
  72
  73 config CRC32
  74         tristate "CRC32/CRC32c functions"
  75         default y
  76         select BITREVERSE
  77         help
  78           This option is provided for the case where no in-kernel-tree
  79           modules require CRC32/CRC32c functions, but a module built outside
  80           the kernel tree does. Such modules that use library CRC32/CRC32c
  81           functions require M here.
  82
  83 config CRC32_SELFTEST
  84         bool "CRC32 perform self test on init"
  85         default n
  86         depends on CRC32
  87         help
  88           This option enables the CRC32 library functions to perform a
  89           self test on initialization. The self test computes crc32_le
  90           and crc32_be over byte strings with random alignment and length
  91           and computes the total elapsed time and number of bytes processed.
  92
  93 choice
  94         prompt "CRC32 implementation"
  95         depends on CRC32
  96         default CRC32_SLICEBY8
  97         help
  98           This option allows a kernel builder to override the default choice
  99           of CRC32 algorithm.  Choose the default ("slice by 8") unless you
 100           know that you need one of the others.
 101
 102 config CRC32_SLICEBY8
 103         bool "Slice by 8 bytes"
 104         help
 105           Calculate checksum 8 bytes at a time with a clever slicing algorithm.
 106           This is the fastest algorithm, but comes with a 8KiB lookup table.
 107           Most modern processors have enough cache to hold this table without
 108           thrashing the cache.
 109
 110           This is the default implementation choice.  Choose this one unless
 111           you have a good reason not to.
 112
 113 config CRC32_SLICEBY4
 114         bool "Slice by 4 bytes"
 115         help
 116           Calculate checksum 4 bytes at a time with a clever slicing algorithm.
 117           This is a bit slower than slice by 8, but has a smaller 4KiB lookup
 118           table.
 119
 120           Only choose this option if you know what you are doing.
 121
 122 config CRC32_SARWATE
 123         bool "Sarwate's Algorithm (one byte at a time)"
 124         help
 125           Calculate checksum a byte at a time using Sarwate's algorithm.  This
 126           is not particularly fast, but has a small 256 byte lookup table.
 127
 128           Only choose this option if you know what you are doing.
 129
 130 config CRC32_BIT
 131         bool "Classic Algorithm (one bit at a time)"
 132         help
 133           Calculate checksum one bit at a time.  This is VERY slow, but has
 134           no lookup table.  This is provided as a debugging option.
 135
 136           Only choose this option if you are debugging crc32.
 137
 138 endchoice
 139
 140 config CRC7
 141         tristate "CRC7 functions"
 142         help
 143           This option is provided for the case where no in-kernel-tree
 144           modules require CRC7 functions, but a module built outside
 145           the kernel tree does. Such modules that use library CRC7
 146           functions require M here.
 147
 148 config LIBCRC32C
 149         tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
 150         select CRYPTO
 151         select CRYPTO_CRC32C
 152         help
 153           This option is provided for the case where no in-kernel-tree
 154           modules require CRC32c functions, but a module built outside the
 155           kernel tree does. Such modules that use library CRC32c functions
 156           require M here.  See Castagnoli93.
 157           Module will be libcrc32c.
 158
 159 config CRC8
 160         tristate "CRC8 function"
 161         help
 162           This option provides CRC8 function. Drivers may select this
 163           when they need to do cyclic redundancy check according CRC8
 164           algorithm. Module will be called crc8.
 165
 166 config AUDIT_GENERIC
 167         bool
 168         depends on AUDIT && !AUDIT_ARCH
 169         default y
 170
 171 #
 172 # compression support is select'ed if needed
 173 #
 174 config ZLIB_INFLATE
 175         tristate
 176
 177 config ZLIB_DEFLATE
 178         tristate
 179
 180 config LZO_COMPRESS
 181         tristate
 182
 183 config LZO_DECOMPRESS
 184         tristate
 185
 186 source "lib/xz/Kconfig"
 187
 188 #
 189 # These all provide a common interface (hence the apparent duplication with
 190 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
 191 #
 192 config DECOMPRESS_GZIP
 193         select ZLIB_INFLATE
 194         tristate
 195
 196 config DECOMPRESS_BZIP2
 197         tristate
 198
 199 config DECOMPRESS_LZMA
 200         tristate
 201
 202 config DECOMPRESS_XZ
 203         select XZ_DEC
 204         tristate
 205
 206 config DECOMPRESS_LZO
 207         select LZO_DECOMPRESS
 208         tristate
 209
 210 #
 211 # Generic allocator support is selected if needed
 212 #
 213 config GENERIC_ALLOCATOR
 214         boolean
 215
 216 #
 217 # reed solomon support is select'ed if needed
 218 #
 219 config REED_SOLOMON
 220         tristate
 221
 222 config REED_SOLOMON_ENC8
 223         boolean
 224
 225 config REED_SOLOMON_DEC8
 226         boolean
 227
 228 config REED_SOLOMON_ENC16
 229         boolean
 230
 231 config REED_SOLOMON_DEC16
 232         boolean
 233
 234 #
 235 # BCH support is selected if needed
 236 #
 237 config BCH
 238         tristate
 239
 240 config BCH_CONST_PARAMS
 241         boolean
 242         help
 243           Drivers may select this option to force specific constant
 244           values for parameters 'm' (Galois field order) and 't'
 245           (error correction capability). Those specific values must
 246           be set by declaring default values for symbols BCH_CONST_M
 247           and BCH_CONST_T.
 248           Doing so will enable extra compiler optimizations,
 249           improving encoding and decoding performance up to 2x for
 250           usual (m,t) values (typically such that m*t < 200).
 251           When this option is selected, the BCH library supports
 252           only a single (m,t) configuration. This is mainly useful
 253           for NAND flash board drivers requiring known, fixed BCH
 254           parameters.
 255
 256 config BCH_CONST_M
 257         int
 258         range 5 15
 259         help
 260           Constant value for Galois field order 'm'. If 'k' is the
 261           number of data bits to protect, 'm' should be chosen such
 262           that (k + m*t) <= 2**m - 1.
 263           Drivers should declare a default value for this symbol if
 264           they select option BCH_CONST_PARAMS.
 265
 266 config BCH_CONST_T
 267         int
 268         help
 269           Constant value for error correction capability in bits 't'.
 270           Drivers should declare a default value for this symbol if
 271           they select option BCH_CONST_PARAMS.
 272
 273 #
 274 # Textsearch support is select'ed if needed
 275 #
 276 config TEXTSEARCH
 277         boolean
 278
 279 config TEXTSEARCH_KMP
 280         tristate
 281
 282 config TEXTSEARCH_BM
 283         tristate
 284
 285 config TEXTSEARCH_FSM
 286         tristate
 287
 288 config BTREE
 289         boolean
 290
 291 config HAS_IOMEM
 292         boolean
 293         depends on !NO_IOMEM
 294         select GENERIC_IO
 295         default y
 296
 297 config HAS_IOPORT
 298         boolean
 299         depends on HAS_IOMEM && !NO_IOPORT
 300         default y
 301
 302 config HAS_DMA
 303         boolean
 304         depends on !NO_DMA
 305         default y
 306
 307 config CHECK_SIGNATURE
 308         bool
 309
 310 config CPUMASK_OFFSTACK
 311         bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
 312         help
 313           Use dynamic allocation for cpumask_var_t, instead of putting
 314           them on the stack.  This is a bit more expensive, but avoids
 315           stack overflow.
 316
 317 config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
 318        bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
 319        depends on EXPERIMENTAL && BROKEN
 320
 321 config CPU_RMAP
 322         bool
 323         depends on SMP
 324
 325 config DQL
 326         bool
 327
 328 #
 329 # Netlink attribute parsing support is select'ed if needed
 330 #
 331 config NLATTR
 332         bool
 333
 334 #
 335 # Generic 64-bit atomic support is selected if needed
 336 #
 337 config GENERIC_ATOMIC64
 338        bool
 339
 340 config LRU_CACHE
 341         tristate
 342
 343 config AVERAGE
 344         bool "Averaging functions"
 345         help
 346           This option is provided for the case where no in-kernel-tree
 347           modules require averaging functions, but a module built outside
 348           the kernel tree does. Such modules that use library averaging
 349           functions require Y here.
 350
 351           If unsure, say N.
 352
 353 config CLZ_TAB
 354         bool
 355
 356 config CORDIC
 357         tristate "CORDIC algorithm"
 358         help
 359           This option provides an implementation of the CORDIC algorithm;
 360           calculations are in fixed point. Module will be called cordic.
 361
 362 config DDR
 363         bool "JEDEC DDR data"
 364         help
 365           Data from JEDEC specs for DDR SDRAM memories,
 366           particularly the AC timing parameters and addressing
 367           information. This data is useful for drivers handling
 368           DDR SDRAM controllers.
 369
 370 config MPILIB
 371         tristate
 372         select CLZ_TAB
 373         help
 374           Multiprecision maths library from GnuPG.
 375           It is used to implement RSA digital signature verification,
 376           which is used by IMA/EVM digital signature extension.
 377
 378 config MPILIB_EXTRA
 379         bool
 380         depends on MPILIB
 381         help
 382           Additional sources of multiprecision maths library from GnuPG.
 383           This code is unnecessary for RSA digital signature verification,
 384           but can be compiled if needed.
 385
 386 config SIGNATURE
 387         tristate
 388         depends on KEYS && CRYPTO
 389         select CRYPTO_SHA1
 390         select MPILIB
 391         help
 392           Digital signature verification. Currently only RSA is supported.
 393           Implementation is done using GnuPG MPI library
 394
 395 endmenu