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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
Kyungsik Leee76e1fd2013-07-08 16:01:46 -0700197config LZ4_DECOMPRESS
198 tristate
199
Lasse Collin24fa0402011-01-12 17:01:22 -0800200source "lib/xz/Kconfig"
201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202#
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800203# These all provide a common interface (hence the apparent duplication with
204# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
205#
206config DECOMPRESS_GZIP
H. Peter Anvin7856a16e2009-01-07 00:01:43 -0800207 select ZLIB_INFLATE
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800208 tristate
209
210config DECOMPRESS_BZIP2
211 tristate
212
213config DECOMPRESS_LZMA
214 tristate
215
Lasse Collin3ebe1242011-01-12 17:01:23 -0800216config DECOMPRESS_XZ
217 select XZ_DEC
218 tristate
219
Albin Tonnerrecacb2462010-01-08 14:42:46 -0800220config DECOMPRESS_LZO
221 select LZO_DECOMPRESS
222 tristate
223
Kyungsik Leee76e1fd2013-07-08 16:01:46 -0700224config DECOMPRESS_LZ4
225 select LZ4_DECOMPRESS
226 tristate
227
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800228#
Jes Sorensenf14f75b2005-06-21 17:15:02 -0700229# Generic allocator support is selected if needed
230#
231config GENERIC_ALLOCATOR
232 boolean
233
234#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235# reed solomon support is select'ed if needed
236#
237config REED_SOLOMON
238 tristate
239
240config REED_SOLOMON_ENC8
241 boolean
242
243config REED_SOLOMON_DEC8
244 boolean
245
246config REED_SOLOMON_ENC16
247 boolean
248
249config REED_SOLOMON_DEC16
250 boolean
251
David S. Millerf7704342005-06-24 17:39:03 -0700252#
Ivan Djelic437aa562011-03-11 11:05:32 +0100253# BCH support is selected if needed
254#
255config BCH
256 tristate
257
258config BCH_CONST_PARAMS
259 boolean
260 help
261 Drivers may select this option to force specific constant
262 values for parameters 'm' (Galois field order) and 't'
263 (error correction capability). Those specific values must
264 be set by declaring default values for symbols BCH_CONST_M
265 and BCH_CONST_T.
266 Doing so will enable extra compiler optimizations,
267 improving encoding and decoding performance up to 2x for
268 usual (m,t) values (typically such that m*t < 200).
269 When this option is selected, the BCH library supports
270 only a single (m,t) configuration. This is mainly useful
271 for NAND flash board drivers requiring known, fixed BCH
272 parameters.
273
274config BCH_CONST_M
275 int
276 range 5 15
277 help
278 Constant value for Galois field order 'm'. If 'k' is the
279 number of data bits to protect, 'm' should be chosen such
280 that (k + m*t) <= 2**m - 1.
281 Drivers should declare a default value for this symbol if
282 they select option BCH_CONST_PARAMS.
283
284config BCH_CONST_T
285 int
286 help
287 Constant value for error correction capability in bits 't'.
288 Drivers should declare a default value for this symbol if
289 they select option BCH_CONST_PARAMS.
290
291#
David S. Millerf7704342005-06-24 17:39:03 -0700292# Textsearch support is select'ed if needed
293#
Thomas Graf2de4ff72005-06-23 20:49:30 -0700294config TEXTSEARCH
David S. Millerf7704342005-06-24 17:39:03 -0700295 boolean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Thomas Grafdf3fb932005-06-23 20:58:37 -0700297config TEXTSEARCH_KMP
David S. Millerf7704342005-06-24 17:39:03 -0700298 tristate
Thomas Grafdf3fb932005-06-23 20:58:37 -0700299
Pablo Neira Ayuso8082e4e2005-08-25 16:12:22 -0700300config TEXTSEARCH_BM
David S. Miller29cb9f92005-08-25 16:23:11 -0700301 tristate
Pablo Neira Ayuso8082e4e2005-08-25 16:12:22 -0700302
Thomas Graf6408f792005-06-23 20:59:16 -0700303config TEXTSEARCH_FSM
David S. Millerf7704342005-06-24 17:39:03 -0700304 tristate
Thomas Graf6408f792005-06-23 20:59:16 -0700305
Joern Engel5db53f32009-11-20 20:13:39 +0100306config BTREE
307 boolean
308
Al Viro5ea81762007-02-11 15:41:31 +0000309config HAS_IOMEM
Al Viroee36c2b2006-12-13 00:35:00 -0800310 boolean
Al Viro5ea81762007-02-11 15:41:31 +0000311 depends on !NO_IOMEM
Richard Weinberger087fafd2012-02-07 01:22:46 +0100312 select GENERIC_IO
Al Viro5ea81762007-02-11 15:41:31 +0000313 default y
314
315config HAS_IOPORT
316 boolean
317 depends on HAS_IOMEM && !NO_IOPORT
Al Viroee36c2b2006-12-13 00:35:00 -0800318 default y
319
Heiko Carstens411f0f32007-05-06 14:49:09 -0700320config HAS_DMA
321 boolean
322 depends on !NO_DMA
323 default y
324
Geert Uytterhoeven928923c2007-08-22 14:01:36 -0700325config CHECK_SIGNATURE
326 bool
327
Rusty Russellaab46da2008-12-13 21:20:27 +1030328config CPUMASK_OFFSTACK
329 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
330 help
331 Use dynamic allocation for cpumask_var_t, instead of putting
332 them on the stack. This is a bit more expensive, but avoids
333 stack overflow.
334
Rusty Russell8c384cd2009-01-01 10:12:30 +1030335config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
336 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
Kees Cook525c1f92013-01-16 18:54:16 -0800337 depends on BROKEN
Rusty Russell8c384cd2009-01-01 10:12:30 +1030338
Ben Hutchingsc39649c2011-01-19 11:03:25 +0000339config CPU_RMAP
340 bool
341 depends on SMP
342
Tom Herbert75957ba2011-11-28 16:32:35 +0000343config DQL
344 bool
345
Geert Uytterhoevene9cc8bd2009-03-04 14:53:30 +0800346#
347# Netlink attribute parsing support is select'ed if needed
348#
349config NLATTR
350 bool
351
Paul Mackerras09d4e0e2009-06-12 21:10:05 +0000352#
353# Generic 64-bit atomic support is selected if needed
354#
355config GENERIC_ATOMIC64
356 bool
357
Catalin Marinas74634492012-07-30 14:41:09 -0700358config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
359 def_bool y if GENERIC_ATOMIC64
360
Philipp Reisnerb411b362009-09-25 16:07:19 -0700361config LRU_CACHE
362 tristate
363
Bruno Randolfc5485a72010-11-16 10:58:37 +0900364config AVERAGE
Michael Buescha7a9a242011-03-01 20:03:05 +0100365 bool "Averaging functions"
366 help
367 This option is provided for the case where no in-kernel-tree
368 modules require averaging functions, but a module built outside
369 the kernel tree does. Such modules that use library averaging
370 functions require Y here.
371
372 If unsure, say N.
Bruno Randolfc5485a72010-11-16 10:58:37 +0900373
David Millerc6df4b12012-02-02 00:17:54 +0200374config CLZ_TAB
375 bool
376
Arend van Spriel10f81132011-05-31 11:22:16 +0200377config CORDIC
Michael Wittend89ce932011-07-29 12:59:51 +0000378 tristate "CORDIC algorithm"
Arend van Spriel10f81132011-05-31 11:22:16 +0200379 help
Michael Witten435a95c2011-07-29 13:36:04 +0000380 This option provides an implementation of the CORDIC algorithm;
381 calculations are in fixed point. Module will be called cordic.
Arend van Spriel10f81132011-05-31 11:22:16 +0200382
Aneesh V9c1c21a2012-04-27 17:54:03 +0530383config DDR
384 bool "JEDEC DDR data"
385 help
386 Data from JEDEC specs for DDR SDRAM memories,
387 particularly the AC timing parameters and addressing
388 information. This data is useful for drivers handling
389 DDR SDRAM controllers.
390
Dmitry Kasatkind9c46b12011-08-31 14:05:16 +0300391config MPILIB
Dmitry Kasatkin2e5f0942012-01-17 17:12:06 +0200392 tristate
David Millerc6df4b12012-02-02 00:17:54 +0200393 select CLZ_TAB
Dmitry Kasatkind9c46b12011-08-31 14:05:16 +0300394 help
395 Multiprecision maths library from GnuPG.
396 It is used to implement RSA digital signature verification,
397 which is used by IMA/EVM digital signature extension.
398
Dmitry Kasatkin5e8898e2012-01-17 17:12:03 +0200399config SIGNATURE
Dmitry Kasatkin2e5f0942012-01-17 17:12:06 +0200400 tristate
Dmitry Kasatkinbe440ec2012-01-17 17:12:04 +0200401 depends on KEYS && CRYPTO
402 select CRYPTO_SHA1
Dmitry Kasatkin051dbb92011-10-14 15:25:16 +0300403 select MPILIB
404 help
405 Digital signature verification. Currently only RSA is supported.
406 Implementation is done using GnuPG MPI library
407
David Daneyab253832012-07-05 18:12:38 +0200408#
409# libfdt files, only selected if needed.
410#
411config LIBFDT
412 bool
413
David Howellsa77ad6e2012-09-21 23:30:46 +0100414config OID_REGISTRY
415 tristate
416 help
417 Enable fast lookup object identifier registry.
418
Matthew Garrett0635eb82013-04-15 13:09:45 -0700419config UCS2_STRING
420 tristate
421
Geert Uytterhoevenee89bd62013-06-09 11:46:43 +0200422source "lib/fonts/Kconfig"
423
Thomas Graf2de4ff72005-06-23 20:49:30 -0700424endmenu