Kconfig 8.9 KB
Newer Older
Linus Torvalds's avatar
Linus Torvalds committed
1 2 3 4
#
# Library configuration
#

5 6 7
config BINARY_PRINTF
	def_bool n

Linus Torvalds's avatar
Linus Torvalds committed
8 9
menu "Library routines"

10 11 12
config RAID6_PQ
	tristate

13 14 15
config BITREVERSE
	tristate

16 17 18
config RATIONAL
	boolean

19
config GENERIC_FIND_FIRST_BIT
20
	bool
21

22 23 24
config NO_GENERIC_PCI_IOPORT_MAP
	bool

25 26 27
config GENERIC_PCI_IOMAP
	bool

28 29
config GENERIC_IOMAP
	bool
30
	select GENERIC_PCI_IOMAP
31

32 33 34 35
config GENERIC_IO
	boolean
	default n

Linus Torvalds's avatar
Linus Torvalds committed
36 37 38 39 40 41 42 43
config CRC_CCITT
	tristate "CRC-CCITT functions"
	help
	  This option is provided for the case where no in-kernel-tree
	  modules require CRC-CCITT functions, but a module built outside
	  the kernel tree does. Such modules that use library CRC-CCITT
	  functions require M here.

44 45 46 47 48 49 50 51
config CRC16
	tristate "CRC16 functions"
	help
	  This option is provided for the case where no in-kernel-tree
	  modules require CRC16 functions, but a module built outside
	  the kernel tree does. Such modules that use library CRC16
	  functions require M here.

52 53 54 55 56 57 58
config CRC_T10DIF
	tristate "CRC calculation for the T10 Data Integrity Field"
	help
	  This option is only needed if a module that's not in the
	  kernel tree needs to calculate CRC checks for use with the
	  SCSI data integrity subsystem.

Ivo van Doorn's avatar
Ivo van Doorn committed
59 60 61 62 63 64 65 66
config CRC_ITU_T
	tristate "CRC ITU-T V.41 functions"
	help
	  This option is provided for the case where no in-kernel-tree
	  modules require CRC ITU-T V.41 functions, but a module built outside
	  the kernel tree does. Such modules that use library CRC ITU-T V.41
	  functions require M here.

Linus Torvalds's avatar
Linus Torvalds committed
67
config CRC32
Darrick J. Wong's avatar
Darrick J. Wong committed
68
	tristate "CRC32/CRC32c functions"
Linus Torvalds's avatar
Linus Torvalds committed
69
	default y
70
	select BITREVERSE
Linus Torvalds's avatar
Linus Torvalds committed
71 72
	help
	  This option is provided for the case where no in-kernel-tree
Darrick J. Wong's avatar
Darrick J. Wong committed
73 74 75
	  modules require CRC32/CRC32c functions, but a module built outside
	  the kernel tree does. Such modules that use library CRC32/CRC32c
	  functions require M here.
Linus Torvalds's avatar
Linus Torvalds committed
76

77 78 79 80 81 82 83 84 85 86
config CRC32_SELFTEST
	bool "CRC32 perform self test on init"
	default n
	depends on CRC32
	help
	  This option enables the CRC32 library functions to perform a
	  self test on initialization. The self test computes crc32_le
	  and crc32_be over byte strings with random alignment and length
	  and computes the total elapsed time and number of bytes processed.

87 88 89 90
choice
	prompt "CRC32 implementation"
	depends on CRC32
	default CRC32_SLICEBY8
91 92 93 94
	help
	  This option allows a kernel builder to override the default choice
	  of CRC32 algorithm.  Choose the default ("slice by 8") unless you
	  know that you need one of the others.
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133

config CRC32_SLICEBY8
	bool "Slice by 8 bytes"
	help
	  Calculate checksum 8 bytes at a time with a clever slicing algorithm.
	  This is the fastest algorithm, but comes with a 8KiB lookup table.
	  Most modern processors have enough cache to hold this table without
	  thrashing the cache.

	  This is the default implementation choice.  Choose this one unless
	  you have a good reason not to.

config CRC32_SLICEBY4
	bool "Slice by 4 bytes"
	help
	  Calculate checksum 4 bytes at a time with a clever slicing algorithm.
	  This is a bit slower than slice by 8, but has a smaller 4KiB lookup
	  table.

	  Only choose this option if you know what you are doing.

config CRC32_SARWATE
	bool "Sarwate's Algorithm (one byte at a time)"
	help
	  Calculate checksum a byte at a time using Sarwate's algorithm.  This
	  is not particularly fast, but has a small 256 byte lookup table.

	  Only choose this option if you know what you are doing.

config CRC32_BIT
	bool "Classic Algorithm (one bit at a time)"
	help
	  Calculate checksum one bit at a time.  This is VERY slow, but has
	  no lookup table.  This is provided as a debugging option.

	  Only choose this option if you are debugging crc32.

endchoice

Jan Nikitenko's avatar
Jan Nikitenko committed
134 135 136 137 138 139 140 141
config CRC7
	tristate "CRC7 functions"
	help
	  This option is provided for the case where no in-kernel-tree
	  modules require CRC7 functions, but a module built outside
	  the kernel tree does. Such modules that use library CRC7
	  functions require M here.

Linus Torvalds's avatar
Linus Torvalds committed
142 143
config LIBCRC32C
	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
144
	select CRYPTO
145
	select CRYPTO_CRC32C
Linus Torvalds's avatar
Linus Torvalds committed
146 147 148 149 150 151 152
	help
	  This option is provided for the case where no in-kernel-tree
	  modules require CRC32c functions, but a module built outside the
	  kernel tree does. Such modules that use library CRC32c functions
	  require M here.  See Castagnoli93.
	  Module will be libcrc32c.

153 154 155 156 157 158 159
config CRC8
	tristate "CRC8 function"
	help
	  This option provides CRC8 function. Drivers may select this
	  when they need to do cyclic redundancy check according CRC8
	  algorithm. Module will be called crc8.

160 161 162 163 164
config AUDIT_GENERIC
	bool
	depends on AUDIT && !AUDIT_ARCH
	default y

Linus Torvalds's avatar
Linus Torvalds committed
165 166 167 168 169 170 171 172 173
#
# compression support is select'ed if needed
#
config ZLIB_INFLATE
	tristate

config ZLIB_DEFLATE
	tristate

174 175 176 177 178 179
config LZO_COMPRESS
	tristate

config LZO_DECOMPRESS
	tristate

180 181
source "lib/xz/Kconfig"

182 183 184 185 186
#
# These all provide a common interface (hence the apparent duplication with
# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
#
config DECOMPRESS_GZIP
187
	select ZLIB_INFLATE
188 189 190 191 192 193 194 195
	tristate

config DECOMPRESS_BZIP2
	tristate

config DECOMPRESS_LZMA
	tristate

196 197 198 199
config DECOMPRESS_XZ
	select XZ_DEC
	tristate

200 201 202 203
config DECOMPRESS_LZO
	select LZO_DECOMPRESS
	tristate

204 205 206 207 208 209
#
# Generic allocator support is selected if needed
#
config GENERIC_ALLOCATOR
	boolean

Linus Torvalds's avatar
Linus Torvalds committed
210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227
#
# reed solomon support is select'ed if needed
#
config REED_SOLOMON
	tristate
	
config REED_SOLOMON_ENC8
	boolean

config REED_SOLOMON_DEC8
	boolean

config REED_SOLOMON_ENC16
	boolean

config REED_SOLOMON_DEC16
	boolean

228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266
#
# BCH support is selected if needed
#
config BCH
	tristate

config BCH_CONST_PARAMS
	boolean
	help
	  Drivers may select this option to force specific constant
	  values for parameters 'm' (Galois field order) and 't'
	  (error correction capability). Those specific values must
	  be set by declaring default values for symbols BCH_CONST_M
	  and BCH_CONST_T.
	  Doing so will enable extra compiler optimizations,
	  improving encoding and decoding performance up to 2x for
	  usual (m,t) values (typically such that m*t < 200).
	  When this option is selected, the BCH library supports
	  only a single (m,t) configuration. This is mainly useful
	  for NAND flash board drivers requiring known, fixed BCH
	  parameters.

config BCH_CONST_M
	int
	range 5 15
	help
	  Constant value for Galois field order 'm'. If 'k' is the
	  number of data bits to protect, 'm' should be chosen such
	  that (k + m*t) <= 2**m - 1.
	  Drivers should declare a default value for this symbol if
	  they select option BCH_CONST_PARAMS.

config BCH_CONST_T
	int
	help
	  Constant value for error correction capability in bits 't'.
	  Drivers should declare a default value for this symbol if
	  they select option BCH_CONST_PARAMS.

267 268 269
#
# Textsearch support is select'ed if needed
#
270
config TEXTSEARCH
271
	boolean
Linus Torvalds's avatar
Linus Torvalds committed
272

273
config TEXTSEARCH_KMP
274
	tristate
275

276
config TEXTSEARCH_BM
277
	tristate
278

279
config TEXTSEARCH_FSM
280
	tristate
281

282 283 284
config BTREE
	boolean

285
config HAS_IOMEM
286
	boolean
287
	depends on !NO_IOMEM
288
	select GENERIC_IO
289 290 291 292 293
	default y

config HAS_IOPORT
	boolean
	depends on HAS_IOMEM && !NO_IOPORT
294 295
	default y

296 297 298 299 300
config HAS_DMA
	boolean
	depends on !NO_DMA
	default y

301 302 303
config CHECK_SIGNATURE
	bool

304 305 306 307 308 309 310
config CPUMASK_OFFSTACK
	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
	help
	  Use dynamic allocation for cpumask_var_t, instead of putting
	  them on the stack.  This is a bit more expensive, but avoids
	  stack overflow.

311 312 313 314
config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
       bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
       depends on EXPERIMENTAL && BROKEN

315 316 317 318
config CPU_RMAP
	bool
	depends on SMP

Tom Herbert's avatar
Tom Herbert committed
319 320 321
config DQL
	bool

322 323 324 325 326 327
#
# Netlink attribute parsing support is select'ed if needed
#
config NLATTR
	bool

328 329 330 331 332 333
#
# Generic 64-bit atomic support is selected if needed
#
config GENERIC_ATOMIC64
       bool

Philipp Reisner's avatar
Philipp Reisner committed
334 335 336
config LRU_CACHE
	tristate

337
config AVERAGE
338 339 340 341 342 343 344 345
	bool "Averaging functions"
	help
	  This option is provided for the case where no in-kernel-tree
	  modules require averaging functions, but a module built outside
	  the kernel tree does. Such modules that use library averaging
	  functions require Y here.

	  If unsure, say N.
346

347 348 349
config CLZ_TAB
	bool

350
config CORDIC
351
	tristate "CORDIC algorithm"
352
	help
353 354
	  This option provides an implementation of the CORDIC algorithm;
	  calculations are in fixed point. Module will be called cordic.
355

356 357 358 359 360 361 362 363
config DDR
	bool "JEDEC DDR data"
	help
	  Data from JEDEC specs for DDR SDRAM memories,
	  particularly the AC timing parameters and addressing
	  information. This data is useful for drivers handling
	  DDR SDRAM controllers.

364
config MPILIB
365
	tristate
366
	select CLZ_TAB
367 368 369 370 371
	help
	  Multiprecision maths library from GnuPG.
	  It is used to implement RSA digital signature verification,
	  which is used by IMA/EVM digital signature extension.

372
config MPILIB_EXTRA
373
	bool
374 375
	depends on MPILIB
	help
376 377 378
	  Additional sources of multiprecision maths library from GnuPG.
	  This code is unnecessary for RSA digital signature verification,
	  but can be compiled if needed.
379

380
config SIGNATURE
381
	tristate
382 383
	depends on KEYS && CRYPTO
	select CRYPTO_SHA1
384 385 386 387 388
	select MPILIB
	help
	  Digital signature verification. Currently only RSA is supported.
	  Implementation is done using GnuPG MPI library

389
endmenu