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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#
2# Library configuration
3#
4
Lai Jiangshan4370aa42009-03-06 17:21:46 +01005config BINARY_PRINTF
6 def_bool n
7
Linus Torvalds1da177e2005-04-16 15:20:36 -07008menu "Library routines"
9
David Woodhousef5e70d02009-07-13 11:35:12 +010010config RAID6_PQ
11 tristate
12
Akinobu Mitaa5cfc1e2006-12-08 02:36:25 -080013config BITREVERSE
14 tristate
15
Oskar Schirmer8759ef32009-06-11 14:51:15 +010016config RATIONAL
17 boolean
18
David S. Miller29225852012-05-24 13:12:28 -070019config GENERIC_STRNCPY_FROM_USER
20 bool
21
Linus Torvaldsa08c5352012-05-26 11:06:38 -070022config GENERIC_STRNLEN_USER
23 bool
24
Andy Shevchenko4cd57732013-06-04 19:46:26 +030025config GENERIC_NET_UTILS
26 bool
27
Alexander van Heukelum19870de2008-04-25 13:12:53 +020028config GENERIC_FIND_FIRST_BIT
Jan Beulich9ba16082008-10-15 22:01:38 -070029 bool
Alexander van Heukelum19870de2008-04-25 13:12:53 +020030
Michael S. Tsirkinb9236502012-01-30 00:20:48 +020031config NO_GENERIC_PCI_IOPORT_MAP
32 bool
33
Michael S. Tsirkin66eab4d2011-11-24 20:45:20 +020034config GENERIC_PCI_IOMAP
35 bool
36
Michael S. Tsirkin4673ca82011-11-24 14:54:28 +020037config GENERIC_IOMAP
38 bool
Michael S. Tsirkin66eab4d2011-11-24 20:45:20 +020039 select GENERIC_PCI_IOMAP
Michael S. Tsirkin4673ca82011-11-24 14:54:28 +020040
Richard Weinberger087fafd2012-02-07 01:22:46 +010041config GENERIC_IO
42 boolean
43 default n
44
Wolfram Sang4ccf4be2011-08-31 20:35:40 +020045config STMP_DEVICE
46 bool
47
Oleg Nesterov22b361d2012-12-17 16:01:39 -080048config PERCPU_RWSEM
49 boolean
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051config 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
Evgeniy Polyakov7657ec12005-08-17 15:17:26 +040059config 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
Martin K. Petersenf11f5942008-06-25 11:22:42 -040067config CRC_T10DIF
68 tristate "CRC calculation for the T10 Data Integrity Field"
Tim Chen2d31e512013-05-01 12:52:48 -070069 select CRYPTO
70 select CRYPTO_CRCT10DIF
Martin K. Petersenf11f5942008-06-25 11:22:42 -040071 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
Ivo van Doorn3e7cbae2006-06-12 16:17:04 +020076config 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070084config CRC32
Darrick J. Wong46c58012012-03-23 15:02:25 -070085 tristate "CRC32/CRC32c functions"
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 default y
Akinobu Mita906d66d2006-12-08 02:36:25 -080087 select BITREVERSE
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 help
89 This option is provided for the case where no in-kernel-tree
Darrick J. Wong46c58012012-03-23 15:02:25 -070090 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
Bob Pearson3863ef32012-03-23 15:02:22 -070094config 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
Darrick J. Wong5cde7652012-03-23 15:02:26 -0700104choice
105 prompt "CRC32 implementation"
106 depends on CRC32
107 default CRC32_SLICEBY8
Darrick J. Wong82edb4b2012-03-28 14:42:56 -0700108 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.
Darrick J. Wong5cde7652012-03-23 15:02:26 -0700112
113config 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
124config 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
133config 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
141config 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
149endchoice
150
Jan Nikitenkoad241522007-07-17 04:04:03 -0700151config 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159config LIBCRC32C
160 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
Herbert Xu93027352008-11-13 22:05:13 +0800161 select CRYPTO
Herbert Xu69c35ef2008-11-07 15:11:47 +0800162 select CRYPTO_CRC32C
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 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
Arend van Spriel71509622011-05-31 11:22:15 +0200170config 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
Al Viroe65e1fc2006-09-12 03:04:40 -0400177config AUDIT_GENERIC
178 bool
179 depends on AUDIT && !AUDIT_ARCH
180 default y
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182#
183# compression support is select'ed if needed
184#
185config ZLIB_INFLATE
186 tristate
187
188config ZLIB_DEFLATE
189 tristate
190
Richard Purdie64c70b12007-07-10 17:22:24 -0700191config LZO_COMPRESS
192 tristate
193
194config LZO_DECOMPRESS
195 tristate
196
Chanho Minc72ac7a2013-07-08 16:01:49 -0700197config LZ4_COMPRESS
198 tristate
199
200config LZ4HC_COMPRESS
201 tristate
202
Kyungsik Leee76e1fd2013-07-08 16:01:46 -0700203config LZ4_DECOMPRESS
204 tristate
205
Lasse Collin24fa0402011-01-12 17:01:22 -0800206source "lib/xz/Kconfig"
207
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208#
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800209# These all provide a common interface (hence the apparent duplication with
210# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
211#
212config DECOMPRESS_GZIP
H. Peter Anvin7856a16e2009-01-07 00:01:43 -0800213 select ZLIB_INFLATE
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800214 tristate
215
216config DECOMPRESS_BZIP2
217 tristate
218
219config DECOMPRESS_LZMA
220 tristate
221
Lasse Collin3ebe1242011-01-12 17:01:23 -0800222config DECOMPRESS_XZ
223 select XZ_DEC
224 tristate
225
Albin Tonnerrecacb2462010-01-08 14:42:46 -0800226config DECOMPRESS_LZO
227 select LZO_DECOMPRESS
228 tristate
229
Kyungsik Leee76e1fd2013-07-08 16:01:46 -0700230config DECOMPRESS_LZ4
231 select LZ4_DECOMPRESS
232 tristate
233
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800234#
Jes Sorensenf14f75b2005-06-21 17:15:02 -0700235# Generic allocator support is selected if needed
236#
237config GENERIC_ALLOCATOR
238 boolean
239
240#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241# reed solomon support is select'ed if needed
242#
243config REED_SOLOMON
244 tristate
245
246config REED_SOLOMON_ENC8
247 boolean
248
249config REED_SOLOMON_DEC8
250 boolean
251
252config REED_SOLOMON_ENC16
253 boolean
254
255config REED_SOLOMON_DEC16
256 boolean
257
David S. Millerf7704342005-06-24 17:39:03 -0700258#
Ivan Djelic437aa562011-03-11 11:05:32 +0100259# BCH support is selected if needed
260#
261config BCH
262 tristate
263
264config BCH_CONST_PARAMS
265 boolean
266 help
267 Drivers may select this option to force specific constant
268 values for parameters 'm' (Galois field order) and 't'
269 (error correction capability). Those specific values must
270 be set by declaring default values for symbols BCH_CONST_M
271 and BCH_CONST_T.
272 Doing so will enable extra compiler optimizations,
273 improving encoding and decoding performance up to 2x for
274 usual (m,t) values (typically such that m*t < 200).
275 When this option is selected, the BCH library supports
276 only a single (m,t) configuration. This is mainly useful
277 for NAND flash board drivers requiring known, fixed BCH
278 parameters.
279
280config BCH_CONST_M
281 int
282 range 5 15
283 help
284 Constant value for Galois field order 'm'. If 'k' is the
285 number of data bits to protect, 'm' should be chosen such
286 that (k + m*t) <= 2**m - 1.
287 Drivers should declare a default value for this symbol if
288 they select option BCH_CONST_PARAMS.
289
290config BCH_CONST_T
291 int
292 help
293 Constant value for error correction capability in bits 't'.
294 Drivers should declare a default value for this symbol if
295 they select option BCH_CONST_PARAMS.
296
297#
David S. Millerf7704342005-06-24 17:39:03 -0700298# Textsearch support is select'ed if needed
299#
Thomas Graf2de4ff72005-06-23 20:49:30 -0700300config TEXTSEARCH
David S. Millerf7704342005-06-24 17:39:03 -0700301 boolean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
Thomas Grafdf3fb932005-06-23 20:58:37 -0700303config TEXTSEARCH_KMP
David S. Millerf7704342005-06-24 17:39:03 -0700304 tristate
Thomas Grafdf3fb932005-06-23 20:58:37 -0700305
Pablo Neira Ayuso8082e4e2005-08-25 16:12:22 -0700306config TEXTSEARCH_BM
David S. Miller29cb9f92005-08-25 16:23:11 -0700307 tristate
Pablo Neira Ayuso8082e4e2005-08-25 16:12:22 -0700308
Thomas Graf6408f792005-06-23 20:59:16 -0700309config TEXTSEARCH_FSM
David S. Millerf7704342005-06-24 17:39:03 -0700310 tristate
Thomas Graf6408f792005-06-23 20:59:16 -0700311
Joern Engel5db53f32009-11-20 20:13:39 +0100312config BTREE
313 boolean
314
Al Viro5ea81762007-02-11 15:41:31 +0000315config HAS_IOMEM
Al Viroee36c2b2006-12-13 00:35:00 -0800316 boolean
Al Viro5ea81762007-02-11 15:41:31 +0000317 depends on !NO_IOMEM
Richard Weinberger087fafd2012-02-07 01:22:46 +0100318 select GENERIC_IO
Al Viro5ea81762007-02-11 15:41:31 +0000319 default y
320
321config HAS_IOPORT
322 boolean
323 depends on HAS_IOMEM && !NO_IOPORT
Al Viroee36c2b2006-12-13 00:35:00 -0800324 default y
325
Heiko Carstens411f0f32007-05-06 14:49:09 -0700326config HAS_DMA
327 boolean
328 depends on !NO_DMA
329 default y
330
Geert Uytterhoeven928923c2007-08-22 14:01:36 -0700331config CHECK_SIGNATURE
332 bool
333
Rusty Russellaab46da2008-12-13 21:20:27 +1030334config CPUMASK_OFFSTACK
335 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
336 help
337 Use dynamic allocation for cpumask_var_t, instead of putting
338 them on the stack. This is a bit more expensive, but avoids
339 stack overflow.
340
Rusty Russell8c384cd2009-01-01 10:12:30 +1030341config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
342 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
Kees Cook525c1f92013-01-16 18:54:16 -0800343 depends on BROKEN
Rusty Russell8c384cd2009-01-01 10:12:30 +1030344
Ben Hutchingsc39649c2011-01-19 11:03:25 +0000345config CPU_RMAP
346 bool
347 depends on SMP
348
Tom Herbert75957ba2011-11-28 16:32:35 +0000349config DQL
350 bool
351
Geert Uytterhoevene9cc8bd2009-03-04 14:53:30 +0800352#
353# Netlink attribute parsing support is select'ed if needed
354#
355config NLATTR
356 bool
357
Paul Mackerras09d4e0e2009-06-12 21:10:05 +0000358#
359# Generic 64-bit atomic support is selected if needed
360#
361config GENERIC_ATOMIC64
362 bool
363
Catalin Marinas74634492012-07-30 14:41:09 -0700364config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
365 def_bool y if GENERIC_ATOMIC64
366
Philipp Reisnerb411b362009-09-25 16:07:19 -0700367config LRU_CACHE
368 tristate
369
Bruno Randolfc5485a72010-11-16 10:58:37 +0900370config AVERAGE
Michael Buescha7a9a242011-03-01 20:03:05 +0100371 bool "Averaging functions"
372 help
373 This option is provided for the case where no in-kernel-tree
374 modules require averaging functions, but a module built outside
375 the kernel tree does. Such modules that use library averaging
376 functions require Y here.
377
378 If unsure, say N.
Bruno Randolfc5485a72010-11-16 10:58:37 +0900379
David Millerc6df4b12012-02-02 00:17:54 +0200380config CLZ_TAB
381 bool
382
Arend van Spriel10f81132011-05-31 11:22:16 +0200383config CORDIC
Michael Wittend89ce932011-07-29 12:59:51 +0000384 tristate "CORDIC algorithm"
Arend van Spriel10f81132011-05-31 11:22:16 +0200385 help
Michael Witten435a95c2011-07-29 13:36:04 +0000386 This option provides an implementation of the CORDIC algorithm;
387 calculations are in fixed point. Module will be called cordic.
Arend van Spriel10f81132011-05-31 11:22:16 +0200388
Aneesh V9c1c21a2012-04-27 17:54:03 +0530389config DDR
390 bool "JEDEC DDR data"
391 help
392 Data from JEDEC specs for DDR SDRAM memories,
393 particularly the AC timing parameters and addressing
394 information. This data is useful for drivers handling
395 DDR SDRAM controllers.
396
Dmitry Kasatkind9c46b12011-08-31 14:05:16 +0300397config MPILIB
Dmitry Kasatkin2e5f0942012-01-17 17:12:06 +0200398 tristate
David Millerc6df4b12012-02-02 00:17:54 +0200399 select CLZ_TAB
Dmitry Kasatkind9c46b12011-08-31 14:05:16 +0300400 help
401 Multiprecision maths library from GnuPG.
402 It is used to implement RSA digital signature verification,
403 which is used by IMA/EVM digital signature extension.
404
Dmitry Kasatkin5e8898e2012-01-17 17:12:03 +0200405config SIGNATURE
Dmitry Kasatkin2e5f0942012-01-17 17:12:06 +0200406 tristate
Dmitry Kasatkinbe440ec2012-01-17 17:12:04 +0200407 depends on KEYS && CRYPTO
408 select CRYPTO_SHA1
Dmitry Kasatkin051dbb92011-10-14 15:25:16 +0300409 select MPILIB
410 help
411 Digital signature verification. Currently only RSA is supported.
412 Implementation is done using GnuPG MPI library
413
David Daneyab253832012-07-05 18:12:38 +0200414#
415# libfdt files, only selected if needed.
416#
417config LIBFDT
418 bool
419
David Howellsa77ad6e2012-09-21 23:30:46 +0100420config OID_REGISTRY
421 tristate
422 help
423 Enable fast lookup object identifier registry.
424
Matthew Garrett0635eb82013-04-15 13:09:45 -0700425config UCS2_STRING
426 tristate
427
Geert Uytterhoevenee89bd62013-06-09 11:46:43 +0200428source "lib/fonts/Kconfig"
429
Thomas Graf2de4ff72005-06-23 20:49:30 -0700430endmenu