blob: 4b31a46fb307bcd33bbc58d8141abfd9ad9ad220 [file] [log] [blame]
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
Alexander van Heukelum19870de2008-04-25 13:12:53 +020025config GENERIC_FIND_FIRST_BIT
Jan Beulich9ba16082008-10-15 22:01:38 -070026 bool
Alexander van Heukelum19870de2008-04-25 13:12:53 +020027
Michael S. Tsirkinb9236502012-01-30 00:20:48 +020028config NO_GENERIC_PCI_IOPORT_MAP
29 bool
30
Michael S. Tsirkin66eab4d2011-11-24 20:45:20 +020031config GENERIC_PCI_IOMAP
32 bool
33
Michael S. Tsirkin4673ca82011-11-24 14:54:28 +020034config GENERIC_IOMAP
35 bool
Michael S. Tsirkin66eab4d2011-11-24 20:45:20 +020036 select GENERIC_PCI_IOMAP
Michael S. Tsirkin4673ca82011-11-24 14:54:28 +020037
Richard Weinberger087fafd2012-02-07 01:22:46 +010038config GENERIC_IO
39 boolean
40 default n
41
Wolfram Sang4ccf4be2011-08-31 20:35:40 +020042config STMP_DEVICE
43 bool
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045config CRC_CCITT
46 tristate "CRC-CCITT functions"
47 help
48 This option is provided for the case where no in-kernel-tree
49 modules require CRC-CCITT functions, but a module built outside
50 the kernel tree does. Such modules that use library CRC-CCITT
51 functions require M here.
52
Evgeniy Polyakov7657ec12005-08-17 15:17:26 +040053config CRC16
54 tristate "CRC16 functions"
55 help
56 This option is provided for the case where no in-kernel-tree
57 modules require CRC16 functions, but a module built outside
58 the kernel tree does. Such modules that use library CRC16
59 functions require M here.
60
Martin K. Petersenf11f5942008-06-25 11:22:42 -040061config CRC_T10DIF
62 tristate "CRC calculation for the T10 Data Integrity Field"
63 help
64 This option is only needed if a module that's not in the
65 kernel tree needs to calculate CRC checks for use with the
66 SCSI data integrity subsystem.
67
Ivo van Doorn3e7cbae2006-06-12 16:17:04 +020068config CRC_ITU_T
69 tristate "CRC ITU-T V.41 functions"
70 help
71 This option is provided for the case where no in-kernel-tree
72 modules require CRC ITU-T V.41 functions, but a module built outside
73 the kernel tree does. Such modules that use library CRC ITU-T V.41
74 functions require M here.
75
Linus Torvalds1da177e2005-04-16 15:20:36 -070076config CRC32
Darrick J. Wong46c58012012-03-23 15:02:25 -070077 tristate "CRC32/CRC32c functions"
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 default y
Akinobu Mita906d66d2006-12-08 02:36:25 -080079 select BITREVERSE
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 help
81 This option is provided for the case where no in-kernel-tree
Darrick J. Wong46c58012012-03-23 15:02:25 -070082 modules require CRC32/CRC32c functions, but a module built outside
83 the kernel tree does. Such modules that use library CRC32/CRC32c
84 functions require M here.
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Bob Pearson3863ef32012-03-23 15:02:22 -070086config CRC32_SELFTEST
87 bool "CRC32 perform self test on init"
88 default n
89 depends on CRC32
90 help
91 This option enables the CRC32 library functions to perform a
92 self test on initialization. The self test computes crc32_le
93 and crc32_be over byte strings with random alignment and length
94 and computes the total elapsed time and number of bytes processed.
95
Darrick J. Wong5cde7652012-03-23 15:02:26 -070096choice
97 prompt "CRC32 implementation"
98 depends on CRC32
99 default CRC32_SLICEBY8
Darrick J. Wong82edb4b2012-03-28 14:42:56 -0700100 help
101 This option allows a kernel builder to override the default choice
102 of CRC32 algorithm. Choose the default ("slice by 8") unless you
103 know that you need one of the others.
Darrick J. Wong5cde7652012-03-23 15:02:26 -0700104
105config CRC32_SLICEBY8
106 bool "Slice by 8 bytes"
107 help
108 Calculate checksum 8 bytes at a time with a clever slicing algorithm.
109 This is the fastest algorithm, but comes with a 8KiB lookup table.
110 Most modern processors have enough cache to hold this table without
111 thrashing the cache.
112
113 This is the default implementation choice. Choose this one unless
114 you have a good reason not to.
115
116config CRC32_SLICEBY4
117 bool "Slice by 4 bytes"
118 help
119 Calculate checksum 4 bytes at a time with a clever slicing algorithm.
120 This is a bit slower than slice by 8, but has a smaller 4KiB lookup
121 table.
122
123 Only choose this option if you know what you are doing.
124
125config CRC32_SARWATE
126 bool "Sarwate's Algorithm (one byte at a time)"
127 help
128 Calculate checksum a byte at a time using Sarwate's algorithm. This
129 is not particularly fast, but has a small 256 byte lookup table.
130
131 Only choose this option if you know what you are doing.
132
133config CRC32_BIT
134 bool "Classic Algorithm (one bit at a time)"
135 help
136 Calculate checksum one bit at a time. This is VERY slow, but has
137 no lookup table. This is provided as a debugging option.
138
139 Only choose this option if you are debugging crc32.
140
141endchoice
142
Jan Nikitenkoad241522007-07-17 04:04:03 -0700143config CRC7
144 tristate "CRC7 functions"
145 help
146 This option is provided for the case where no in-kernel-tree
147 modules require CRC7 functions, but a module built outside
148 the kernel tree does. Such modules that use library CRC7
149 functions require M here.
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151config LIBCRC32C
152 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
Herbert Xu93027352008-11-13 22:05:13 +0800153 select CRYPTO
Herbert Xu69c35ef2008-11-07 15:11:47 +0800154 select CRYPTO_CRC32C
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 help
156 This option is provided for the case where no in-kernel-tree
157 modules require CRC32c functions, but a module built outside the
158 kernel tree does. Such modules that use library CRC32c functions
159 require M here. See Castagnoli93.
160 Module will be libcrc32c.
161
Arend van Spriel71509622011-05-31 11:22:15 +0200162config CRC8
163 tristate "CRC8 function"
164 help
165 This option provides CRC8 function. Drivers may select this
166 when they need to do cyclic redundancy check according CRC8
167 algorithm. Module will be called crc8.
168
Al Viroe65e1fc2006-09-12 03:04:40 -0400169config AUDIT_GENERIC
170 bool
171 depends on AUDIT && !AUDIT_ARCH
172 default y
173
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174#
175# compression support is select'ed if needed
176#
177config ZLIB_INFLATE
178 tristate
179
180config ZLIB_DEFLATE
181 tristate
182
Richard Purdie64c70b12007-07-10 17:22:24 -0700183config LZO_COMPRESS
184 tristate
185
186config LZO_DECOMPRESS
187 tristate
188
Lasse Collin24fa0402011-01-12 17:01:22 -0800189source "lib/xz/Kconfig"
190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191#
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800192# These all provide a common interface (hence the apparent duplication with
193# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
194#
195config DECOMPRESS_GZIP
H. Peter Anvin7856a16e2009-01-07 00:01:43 -0800196 select ZLIB_INFLATE
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800197 tristate
198
199config DECOMPRESS_BZIP2
200 tristate
201
202config DECOMPRESS_LZMA
203 tristate
204
Lasse Collin3ebe1242011-01-12 17:01:23 -0800205config DECOMPRESS_XZ
206 select XZ_DEC
207 tristate
208
Albin Tonnerrecacb2462010-01-08 14:42:46 -0800209config DECOMPRESS_LZO
210 select LZO_DECOMPRESS
211 tristate
212
H. Peter Anvinc8531ab2009-01-05 13:48:31 -0800213#
Jes Sorensenf14f75b2005-06-21 17:15:02 -0700214# Generic allocator support is selected if needed
215#
216config GENERIC_ALLOCATOR
217 boolean
218
219#
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220# reed solomon support is select'ed if needed
221#
222config REED_SOLOMON
223 tristate
224
225config REED_SOLOMON_ENC8
226 boolean
227
228config REED_SOLOMON_DEC8
229 boolean
230
231config REED_SOLOMON_ENC16
232 boolean
233
234config REED_SOLOMON_DEC16
235 boolean
236
David S. Millerf7704342005-06-24 17:39:03 -0700237#
Ivan Djelic437aa562011-03-11 11:05:32 +0100238# BCH support is selected if needed
239#
240config BCH
241 tristate
242
243config BCH_CONST_PARAMS
244 boolean
245 help
246 Drivers may select this option to force specific constant
247 values for parameters 'm' (Galois field order) and 't'
248 (error correction capability). Those specific values must
249 be set by declaring default values for symbols BCH_CONST_M
250 and BCH_CONST_T.
251 Doing so will enable extra compiler optimizations,
252 improving encoding and decoding performance up to 2x for
253 usual (m,t) values (typically such that m*t < 200).
254 When this option is selected, the BCH library supports
255 only a single (m,t) configuration. This is mainly useful
256 for NAND flash board drivers requiring known, fixed BCH
257 parameters.
258
259config BCH_CONST_M
260 int
261 range 5 15
262 help
263 Constant value for Galois field order 'm'. If 'k' is the
264 number of data bits to protect, 'm' should be chosen such
265 that (k + m*t) <= 2**m - 1.
266 Drivers should declare a default value for this symbol if
267 they select option BCH_CONST_PARAMS.
268
269config BCH_CONST_T
270 int
271 help
272 Constant value for error correction capability in bits 't'.
273 Drivers should declare a default value for this symbol if
274 they select option BCH_CONST_PARAMS.
275
276#
David S. Millerf7704342005-06-24 17:39:03 -0700277# Textsearch support is select'ed if needed
278#
Thomas Graf2de4ff72005-06-23 20:49:30 -0700279config TEXTSEARCH
David S. Millerf7704342005-06-24 17:39:03 -0700280 boolean
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Thomas Grafdf3fb932005-06-23 20:58:37 -0700282config TEXTSEARCH_KMP
David S. Millerf7704342005-06-24 17:39:03 -0700283 tristate
Thomas Grafdf3fb932005-06-23 20:58:37 -0700284
Pablo Neira Ayuso8082e4e2005-08-25 16:12:22 -0700285config TEXTSEARCH_BM
David S. Miller29cb9f92005-08-25 16:23:11 -0700286 tristate
Pablo Neira Ayuso8082e4e2005-08-25 16:12:22 -0700287
Thomas Graf6408f792005-06-23 20:59:16 -0700288config TEXTSEARCH_FSM
David S. Millerf7704342005-06-24 17:39:03 -0700289 tristate
Thomas Graf6408f792005-06-23 20:59:16 -0700290
Joern Engel5db53f32009-11-20 20:13:39 +0100291config BTREE
292 boolean
293
Al Viro5ea81762007-02-11 15:41:31 +0000294config HAS_IOMEM
Al Viroee36c2b2006-12-13 00:35:00 -0800295 boolean
Al Viro5ea81762007-02-11 15:41:31 +0000296 depends on !NO_IOMEM
Richard Weinberger087fafd2012-02-07 01:22:46 +0100297 select GENERIC_IO
Al Viro5ea81762007-02-11 15:41:31 +0000298 default y
299
300config HAS_IOPORT
301 boolean
302 depends on HAS_IOMEM && !NO_IOPORT
Al Viroee36c2b2006-12-13 00:35:00 -0800303 default y
304
Heiko Carstens411f0f32007-05-06 14:49:09 -0700305config HAS_DMA
306 boolean
307 depends on !NO_DMA
308 default y
309
Geert Uytterhoeven928923c2007-08-22 14:01:36 -0700310config CHECK_SIGNATURE
311 bool
312
Rusty Russellaab46da2008-12-13 21:20:27 +1030313config CPUMASK_OFFSTACK
314 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
315 help
316 Use dynamic allocation for cpumask_var_t, instead of putting
317 them on the stack. This is a bit more expensive, but avoids
318 stack overflow.
319
Rusty Russell8c384cd2009-01-01 10:12:30 +1030320config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
321 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
322 depends on EXPERIMENTAL && BROKEN
323
Ben Hutchingsc39649c2011-01-19 11:03:25 +0000324config CPU_RMAP
325 bool
326 depends on SMP
327
Tom Herbert75957ba2011-11-28 16:32:35 +0000328config DQL
329 bool
330
Geert Uytterhoevene9cc8bd2009-03-04 14:53:30 +0800331#
332# Netlink attribute parsing support is select'ed if needed
333#
334config NLATTR
335 bool
336
Paul Mackerras09d4e0e2009-06-12 21:10:05 +0000337#
338# Generic 64-bit atomic support is selected if needed
339#
340config GENERIC_ATOMIC64
341 bool
342
Catalin Marinas74634492012-07-30 14:41:09 -0700343config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
344 def_bool y if GENERIC_ATOMIC64
345
Philipp Reisnerb411b362009-09-25 16:07:19 -0700346config LRU_CACHE
347 tristate
348
Bruno Randolfc5485a72010-11-16 10:58:37 +0900349config AVERAGE
Michael Buescha7a9a242011-03-01 20:03:05 +0100350 bool "Averaging functions"
351 help
352 This option is provided for the case where no in-kernel-tree
353 modules require averaging functions, but a module built outside
354 the kernel tree does. Such modules that use library averaging
355 functions require Y here.
356
357 If unsure, say N.
Bruno Randolfc5485a72010-11-16 10:58:37 +0900358
David Millerc6df4b12012-02-02 00:17:54 +0200359config CLZ_TAB
360 bool
361
Arend van Spriel10f81132011-05-31 11:22:16 +0200362config CORDIC
Michael Wittend89ce932011-07-29 12:59:51 +0000363 tristate "CORDIC algorithm"
Arend van Spriel10f81132011-05-31 11:22:16 +0200364 help
Michael Witten435a95c2011-07-29 13:36:04 +0000365 This option provides an implementation of the CORDIC algorithm;
366 calculations are in fixed point. Module will be called cordic.
Arend van Spriel10f81132011-05-31 11:22:16 +0200367
Aneesh V9c1c21a2012-04-27 17:54:03 +0530368config DDR
369 bool "JEDEC DDR data"
370 help
371 Data from JEDEC specs for DDR SDRAM memories,
372 particularly the AC timing parameters and addressing
373 information. This data is useful for drivers handling
374 DDR SDRAM controllers.
375
Dmitry Kasatkind9c46b12011-08-31 14:05:16 +0300376config MPILIB
Dmitry Kasatkin2e5f0942012-01-17 17:12:06 +0200377 tristate
David Millerc6df4b12012-02-02 00:17:54 +0200378 select CLZ_TAB
Dmitry Kasatkind9c46b12011-08-31 14:05:16 +0300379 help
380 Multiprecision maths library from GnuPG.
381 It is used to implement RSA digital signature verification,
382 which is used by IMA/EVM digital signature extension.
383
Dmitry Kasatkin5e8898e2012-01-17 17:12:03 +0200384config SIGNATURE
Dmitry Kasatkin2e5f0942012-01-17 17:12:06 +0200385 tristate
Dmitry Kasatkinbe440ec2012-01-17 17:12:04 +0200386 depends on KEYS && CRYPTO
387 select CRYPTO_SHA1
Dmitry Kasatkin051dbb92011-10-14 15:25:16 +0300388 select MPILIB
389 help
390 Digital signature verification. Currently only RSA is supported.
391 Implementation is done using GnuPG MPI library
392
David Daneyab253832012-07-05 18:12:38 +0200393#
394# libfdt files, only selected if needed.
395#
396config LIBFDT
397 bool
398
David Howellsa77ad6e2012-09-21 23:30:46 +0100399config OID_REGISTRY
400 tristate
401 help
402 Enable fast lookup object identifier registry.
403
Thomas Graf2de4ff72005-06-23 20:49:30 -0700404endmenu