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1da177e4
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1#
2# Library configuration
3#
4
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5config BINARY_PRINTF
6 def_bool n
7
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8menu "Library routines"
9
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10config RAID6_PQ
11 tristate
12
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13config BITREVERSE
14 tristate
15
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16config RATIONAL
17 boolean
18
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19config GENERIC_STRNCPY_FROM_USER
20 bool
21
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22config GENERIC_STRNLEN_USER
23 bool
24
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25config GENERIC_NET_UTILS
26 bool
27
19870def 28config GENERIC_FIND_FIRST_BIT
9ba16087 29 bool
19870def 30
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31config NO_GENERIC_PCI_IOPORT_MAP
32 bool
33
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34config GENERIC_PCI_IOMAP
35 bool
36
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37config GENERIC_IOMAP
38 bool
66eab4df 39 select GENERIC_PCI_IOMAP
4673ca8e 40
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41config GENERIC_IO
42 boolean
43 default n
44
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45config STMP_DEVICE
46 bool
47
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48config PERCPU_RWSEM
49 boolean
50
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51config ARCH_USE_CMPXCHG_LOCKREF
52 bool
53
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54config CRC_CCITT
55 tristate "CRC-CCITT functions"
56 help
57 This option is provided for the case where no in-kernel-tree
58 modules require CRC-CCITT functions, but a module built outside
59 the kernel tree does. Such modules that use library CRC-CCITT
60 functions require M here.
61
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62config CRC16
63 tristate "CRC16 functions"
64 help
65 This option is provided for the case where no in-kernel-tree
66 modules require CRC16 functions, but a module built outside
67 the kernel tree does. Such modules that use library CRC16
68 functions require M here.
69
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70config CRC_T10DIF
71 tristate "CRC calculation for the T10 Data Integrity Field"
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72 select CRYPTO
73 select CRYPTO_CRCT10DIF
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74 help
75 This option is only needed if a module that's not in the
76 kernel tree needs to calculate CRC checks for use with the
77 SCSI data integrity subsystem.
78
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79config CRC_ITU_T
80 tristate "CRC ITU-T V.41 functions"
81 help
82 This option is provided for the case where no in-kernel-tree
83 modules require CRC ITU-T V.41 functions, but a module built outside
84 the kernel tree does. Such modules that use library CRC ITU-T V.41
85 functions require M here.
86
1da177e4 87config CRC32
46c5801e 88 tristate "CRC32/CRC32c functions"
1da177e4 89 default y
906d66df 90 select BITREVERSE
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91 help
92 This option is provided for the case where no in-kernel-tree
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93 modules require CRC32/CRC32c functions, but a module built outside
94 the kernel tree does. Such modules that use library CRC32/CRC32c
95 functions require M here.
1da177e4 96
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97config CRC32_SELFTEST
98 bool "CRC32 perform self test on init"
99 default n
100 depends on CRC32
101 help
102 This option enables the CRC32 library functions to perform a
103 self test on initialization. The self test computes crc32_le
104 and crc32_be over byte strings with random alignment and length
105 and computes the total elapsed time and number of bytes processed.
106
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107choice
108 prompt "CRC32 implementation"
109 depends on CRC32
110 default CRC32_SLICEBY8
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111 help
112 This option allows a kernel builder to override the default choice
113 of CRC32 algorithm. Choose the default ("slice by 8") unless you
114 know that you need one of the others.
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115
116config CRC32_SLICEBY8
117 bool "Slice by 8 bytes"
118 help
119 Calculate checksum 8 bytes at a time with a clever slicing algorithm.
120 This is the fastest algorithm, but comes with a 8KiB lookup table.
121 Most modern processors have enough cache to hold this table without
122 thrashing the cache.
123
124 This is the default implementation choice. Choose this one unless
125 you have a good reason not to.
126
127config CRC32_SLICEBY4
128 bool "Slice by 4 bytes"
129 help
130 Calculate checksum 4 bytes at a time with a clever slicing algorithm.
131 This is a bit slower than slice by 8, but has a smaller 4KiB lookup
132 table.
133
134 Only choose this option if you know what you are doing.
135
136config CRC32_SARWATE
137 bool "Sarwate's Algorithm (one byte at a time)"
138 help
139 Calculate checksum a byte at a time using Sarwate's algorithm. This
140 is not particularly fast, but has a small 256 byte lookup table.
141
142 Only choose this option if you know what you are doing.
143
144config CRC32_BIT
145 bool "Classic Algorithm (one bit at a time)"
146 help
147 Calculate checksum one bit at a time. This is VERY slow, but has
148 no lookup table. This is provided as a debugging option.
149
150 Only choose this option if you are debugging crc32.
151
152endchoice
153
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154config CRC7
155 tristate "CRC7 functions"
156 help
157 This option is provided for the case where no in-kernel-tree
158 modules require CRC7 functions, but a module built outside
159 the kernel tree does. Such modules that use library CRC7
160 functions require M here.
161
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162config LIBCRC32C
163 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
93027354 164 select CRYPTO
69c35efc 165 select CRYPTO_CRC32C
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166 help
167 This option is provided for the case where no in-kernel-tree
168 modules require CRC32c functions, but a module built outside the
169 kernel tree does. Such modules that use library CRC32c functions
170 require M here. See Castagnoli93.
171 Module will be libcrc32c.
172
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173config CRC8
174 tristate "CRC8 function"
175 help
176 This option provides CRC8 function. Drivers may select this
177 when they need to do cyclic redundancy check according CRC8
178 algorithm. Module will be called crc8.
179
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180config AUDIT_GENERIC
181 bool
182 depends on AUDIT && !AUDIT_ARCH
183 default y
184
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185config RANDOM32_SELFTEST
186 bool "PRNG perform self test on init"
187 default n
188 help
189 This option enables the 32 bit PRNG library functions to perform a
190 self test on initialization.
191
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192#
193# compression support is select'ed if needed
194#
195config ZLIB_INFLATE
196 tristate
197
198config ZLIB_DEFLATE
199 tristate
200
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201config LZO_COMPRESS
202 tristate
203
204config LZO_DECOMPRESS
205 tristate
206
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207config LZ4_COMPRESS
208 tristate
209
210config LZ4HC_COMPRESS
211 tristate
212
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213config LZ4_DECOMPRESS
214 tristate
215
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216source "lib/xz/Kconfig"
217
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218#
219# These all provide a common interface (hence the apparent duplication with
220# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
221#
222config DECOMPRESS_GZIP
7856a16e 223 select ZLIB_INFLATE
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224 tristate
225
226config DECOMPRESS_BZIP2
227 tristate
228
229config DECOMPRESS_LZMA
230 tristate
231
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232config DECOMPRESS_XZ
233 select XZ_DEC
234 tristate
235
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236config DECOMPRESS_LZO
237 select LZO_DECOMPRESS
238 tristate
239
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240config DECOMPRESS_LZ4
241 select LZ4_DECOMPRESS
242 tristate
243
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244#
245# Generic allocator support is selected if needed
246#
247config GENERIC_ALLOCATOR
248 boolean
249
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250#
251# reed solomon support is select'ed if needed
252#
253config REED_SOLOMON
254 tristate
255
256config REED_SOLOMON_ENC8
257 boolean
258
259config REED_SOLOMON_DEC8
260 boolean
261
262config REED_SOLOMON_ENC16
263 boolean
264
265config REED_SOLOMON_DEC16
266 boolean
267
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268#
269# BCH support is selected if needed
270#
271config BCH
272 tristate
273
274config BCH_CONST_PARAMS
275 boolean
276 help
277 Drivers may select this option to force specific constant
278 values for parameters 'm' (Galois field order) and 't'
279 (error correction capability). Those specific values must
280 be set by declaring default values for symbols BCH_CONST_M
281 and BCH_CONST_T.
282 Doing so will enable extra compiler optimizations,
283 improving encoding and decoding performance up to 2x for
284 usual (m,t) values (typically such that m*t < 200).
285 When this option is selected, the BCH library supports
286 only a single (m,t) configuration. This is mainly useful
287 for NAND flash board drivers requiring known, fixed BCH
288 parameters.
289
290config BCH_CONST_M
291 int
292 range 5 15
293 help
294 Constant value for Galois field order 'm'. If 'k' is the
295 number of data bits to protect, 'm' should be chosen such
296 that (k + m*t) <= 2**m - 1.
297 Drivers should declare a default value for this symbol if
298 they select option BCH_CONST_PARAMS.
299
300config BCH_CONST_T
301 int
302 help
303 Constant value for error correction capability in bits 't'.
304 Drivers should declare a default value for this symbol if
305 they select option BCH_CONST_PARAMS.
306
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307#
308# Textsearch support is select'ed if needed
309#
2de4ff7b 310config TEXTSEARCH
f7704347 311 boolean
1da177e4 312
df3fb93a 313config TEXTSEARCH_KMP
f7704347 314 tristate
df3fb93a 315
8082e4ed 316config TEXTSEARCH_BM
29cb9f9c 317 tristate
8082e4ed 318
6408f79c 319config TEXTSEARCH_FSM
f7704347 320 tristate
6408f79c 321
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322config BTREE
323 boolean
324
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325config ASSOCIATIVE_ARRAY
326 bool
327 help
328 Generic associative array. Can be searched and iterated over whilst
329 it is being modified. It is also reasonably quick to search and
330 modify. The algorithms are non-recursive, and the trees are highly
331 capacious.
332
333 See:
334
335 Documentation/assoc_array.txt
336
337 for more information.
338
5ea81769 339config HAS_IOMEM
ee36c2bf 340 boolean
5ea81769 341 depends on !NO_IOMEM
087fafd1 342 select GENERIC_IO
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343 default y
344
345config HAS_IOPORT
346 boolean
347 depends on HAS_IOMEM && !NO_IOPORT
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348 default y
349
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350config HAS_DMA
351 boolean
352 depends on !NO_DMA
353 default y
354
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355config CHECK_SIGNATURE
356 bool
357
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358config CPUMASK_OFFSTACK
359 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
360 help
361 Use dynamic allocation for cpumask_var_t, instead of putting
362 them on the stack. This is a bit more expensive, but avoids
363 stack overflow.
364
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365config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
366 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
525c1f92 367 depends on BROKEN
8c384cde 368
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369config CPU_RMAP
370 bool
371 depends on SMP
372
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373config DQL
374 bool
375
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376#
377# Netlink attribute parsing support is select'ed if needed
378#
379config NLATTR
380 bool
381
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382#
383# Generic 64-bit atomic support is selected if needed
384#
385config GENERIC_ATOMIC64
386 bool
387
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388config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
389 def_bool y if GENERIC_ATOMIC64
390
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391config LRU_CACHE
392 tristate
393
c5485a7e 394config AVERAGE
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395 bool "Averaging functions"
396 help
397 This option is provided for the case where no in-kernel-tree
398 modules require averaging functions, but a module built outside
399 the kernel tree does. Such modules that use library averaging
400 functions require Y here.
401
402 If unsure, say N.
c5485a7e 403
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404config CLZ_TAB
405 bool
406
10f8113e 407config CORDIC
d89ce936 408 tristate "CORDIC algorithm"
10f8113e 409 help
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410 This option provides an implementation of the CORDIC algorithm;
411 calculations are in fixed point. Module will be called cordic.
10f8113e 412
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413config DDR
414 bool "JEDEC DDR data"
415 help
416 Data from JEDEC specs for DDR SDRAM memories,
417 particularly the AC timing parameters and addressing
418 information. This data is useful for drivers handling
419 DDR SDRAM controllers.
420
d9c46b18 421config MPILIB
2e5f094b 422 tristate
c6df4b17 423 select CLZ_TAB
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424 help
425 Multiprecision maths library from GnuPG.
426 It is used to implement RSA digital signature verification,
427 which is used by IMA/EVM digital signature extension.
428
5e8898e9 429config SIGNATURE
2e5f094b 430 tristate
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431 depends on KEYS && CRYPTO
432 select CRYPTO_SHA1
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433 select MPILIB
434 help
435 Digital signature verification. Currently only RSA is supported.
436 Implementation is done using GnuPG MPI library
437
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438#
439# libfdt files, only selected if needed.
440#
441config LIBFDT
442 bool
443
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444config OID_REGISTRY
445 tristate
446 help
447 Enable fast lookup object identifier registry.
448
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449config UCS2_STRING
450 tristate
451
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452source "lib/fonts/Kconfig"
453
2de4ff7b 454endmenu