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1#
2# Library configuration
3#
4
5config BINARY_PRINTF
6 def_bool n
7
8menu "Library routines"
9
10config RAID6_PQ
11 tristate
12
13config BITREVERSE
14 tristate
15
16config RATIONAL
17 boolean
18
19config GENERIC_STRNCPY_FROM_USER
20 bool
21
22config GENERIC_STRNLEN_USER
23 bool
24
25config GENERIC_NET_UTILS
26 bool
27
28config GENERIC_FIND_FIRST_BIT
29 bool
30
31config NO_GENERIC_PCI_IOPORT_MAP
32 bool
33
34config GENERIC_PCI_IOMAP
35 bool
36
37config GENERIC_IOMAP
38 bool
39 select GENERIC_PCI_IOMAP
40
41config GENERIC_IO
42 boolean
43 default n
44
45config STMP_DEVICE
46 bool
47
48config PERCPU_RWSEM
49 boolean
50
51config ARCH_USE_CMPXCHG_LOCKREF
52 bool
53
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
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
70config CRC_T10DIF
71 tristate "CRC calculation for the T10 Data Integrity Field"
72 select CRYPTO
73 select CRYPTO_CRCT10DIF
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
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
87config CRC32
88 tristate "CRC32/CRC32c functions"
89 default y
90 select BITREVERSE
91 help
92 This option is provided for the case where no in-kernel-tree
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.
96
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
107choice
108 prompt "CRC32 implementation"
109 depends on CRC32
110 default CRC32_SLICEBY8
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.
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
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
162config LIBCRC32C
163 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
164 select CRYPTO
165 select CRYPTO_CRC32C
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
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
180config AUDIT_GENERIC
181 bool
182 depends on AUDIT && !AUDIT_ARCH
183 default y
184
185config AUDIT_ARCH_COMPAT_GENERIC
186 bool
187 default n
188
189config AUDIT_COMPAT_GENERIC
190 bool
191 depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
192 default y
193
194config RANDOM32_SELFTEST
195 bool "PRNG perform self test on init"
196 default n
197 help
198 This option enables the 32 bit PRNG library functions to perform a
199 self test on initialization.
200
201#
202# compression support is select'ed if needed
203#
204config ZLIB_INFLATE
205 tristate
206
207config ZLIB_DEFLATE
208 tristate
209
210config LZO_COMPRESS
211 tristate
212
213config LZO_DECOMPRESS
214 tristate
215
216config LZ4_COMPRESS
217 tristate
218
219config LZ4HC_COMPRESS
220 tristate
221
222config LZ4_DECOMPRESS
223 tristate
224
225source "lib/xz/Kconfig"
226
227#
228# These all provide a common interface (hence the apparent duplication with
229# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
230#
231config DECOMPRESS_GZIP
232 select ZLIB_INFLATE
233 tristate
234
235config DECOMPRESS_BZIP2
236 tristate
237
238config DECOMPRESS_LZMA
239 tristate
240
241config DECOMPRESS_XZ
242 select XZ_DEC
243 tristate
244
245config DECOMPRESS_LZO
246 select LZO_DECOMPRESS
247 tristate
248
249config DECOMPRESS_LZ4
250 select LZ4_DECOMPRESS
251 tristate
252
253#
254# Generic allocator support is selected if needed
255#
256config GENERIC_ALLOCATOR
257 boolean
258
259#
260# reed solomon support is select'ed if needed
261#
262config REED_SOLOMON
263 tristate
264
265config REED_SOLOMON_ENC8
266 boolean
267
268config REED_SOLOMON_DEC8
269 boolean
270
271config REED_SOLOMON_ENC16
272 boolean
273
274config REED_SOLOMON_DEC16
275 boolean
276
277#
278# BCH support is selected if needed
279#
280config BCH
281 tristate
282
283config BCH_CONST_PARAMS
284 boolean
285 help
286 Drivers may select this option to force specific constant
287 values for parameters 'm' (Galois field order) and 't'
288 (error correction capability). Those specific values must
289 be set by declaring default values for symbols BCH_CONST_M
290 and BCH_CONST_T.
291 Doing so will enable extra compiler optimizations,
292 improving encoding and decoding performance up to 2x for
293 usual (m,t) values (typically such that m*t < 200).
294 When this option is selected, the BCH library supports
295 only a single (m,t) configuration. This is mainly useful
296 for NAND flash board drivers requiring known, fixed BCH
297 parameters.
298
299config BCH_CONST_M
300 int
301 range 5 15
302 help
303 Constant value for Galois field order 'm'. If 'k' is the
304 number of data bits to protect, 'm' should be chosen such
305 that (k + m*t) <= 2**m - 1.
306 Drivers should declare a default value for this symbol if
307 they select option BCH_CONST_PARAMS.
308
309config BCH_CONST_T
310 int
311 help
312 Constant value for error correction capability in bits 't'.
313 Drivers should declare a default value for this symbol if
314 they select option BCH_CONST_PARAMS.
315
316#
317# Textsearch support is select'ed if needed
318#
319config TEXTSEARCH
320 boolean
321
322config TEXTSEARCH_KMP
323 tristate
324
325config TEXTSEARCH_BM
326 tristate
327
328config TEXTSEARCH_FSM
329 tristate
330
331config BTREE
332 boolean
333
334config ASSOCIATIVE_ARRAY
335 bool
336 help
337 Generic associative array. Can be searched and iterated over whilst
338 it is being modified. It is also reasonably quick to search and
339 modify. The algorithms are non-recursive, and the trees are highly
340 capacious.
341
342 See:
343
344 Documentation/assoc_array.txt
345
346 for more information.
347
348config HAS_IOMEM
349 boolean
350 depends on !NO_IOMEM
351 select GENERIC_IO
352 default y
353
354config HAS_IOPORT_MAP
355 boolean
356 depends on HAS_IOMEM && !NO_IOPORT_MAP
357 default y
358
359config HAS_DMA
360 boolean
361 depends on !NO_DMA
362 default y
363
364config CHECK_SIGNATURE
365 bool
366
367config CPUMASK_OFFSTACK
368 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
369 help
370 Use dynamic allocation for cpumask_var_t, instead of putting
371 them on the stack. This is a bit more expensive, but avoids
372 stack overflow.
373
374config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
375 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
376 depends on BROKEN
377
378config CPU_RMAP
379 bool
380 depends on SMP
381
382config DQL
383 bool
384
385#
386# Netlink attribute parsing support is select'ed if needed
387#
388config NLATTR
389 bool
390
391#
392# Generic 64-bit atomic support is selected if needed
393#
394config GENERIC_ATOMIC64
395 bool
396
397config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
398 def_bool y if GENERIC_ATOMIC64
399
400config LRU_CACHE
401 tristate
402
403config AVERAGE
404 bool "Averaging functions"
405 help
406 This option is provided for the case where no in-kernel-tree
407 modules require averaging functions, but a module built outside
408 the kernel tree does. Such modules that use library averaging
409 functions require Y here.
410
411 If unsure, say N.
412
413config CLZ_TAB
414 bool
415
416config CORDIC
417 tristate "CORDIC algorithm"
418 help
419 This option provides an implementation of the CORDIC algorithm;
420 calculations are in fixed point. Module will be called cordic.
421
422config DDR
423 bool "JEDEC DDR data"
424 help
425 Data from JEDEC specs for DDR SDRAM memories,
426 particularly the AC timing parameters and addressing
427 information. This data is useful for drivers handling
428 DDR SDRAM controllers.
429
430config MPILIB
431 tristate
432 select CLZ_TAB
433 help
434 Multiprecision maths library from GnuPG.
435 It is used to implement RSA digital signature verification,
436 which is used by IMA/EVM digital signature extension.
437
438config SIGNATURE
439 tristate
440 depends on KEYS && CRYPTO
441 select CRYPTO_SHA1
442 select MPILIB
443 help
444 Digital signature verification. Currently only RSA is supported.
445 Implementation is done using GnuPG MPI library
446
447#
448# libfdt files, only selected if needed.
449#
450config LIBFDT
451 bool
452
453config OID_REGISTRY
454 tristate
455 help
456 Enable fast lookup object identifier registry.
457
458config UCS2_STRING
459 tristate
460
461source "lib/fonts/Kconfig"
462
463endmenu
1#
2# Library configuration
3#
4
5config BINARY_PRINTF
6 def_bool n
7
8menu "Library routines"
9
10config RAID6_PQ
11 tristate
12
13config BITREVERSE
14 tristate
15
16config RATIONAL
17 boolean
18
19config GENERIC_STRNCPY_FROM_USER
20 bool
21
22config GENERIC_STRNLEN_USER
23 bool
24
25config GENERIC_FIND_FIRST_BIT
26 bool
27
28config NO_GENERIC_PCI_IOPORT_MAP
29 bool
30
31config GENERIC_PCI_IOMAP
32 bool
33
34config GENERIC_IOMAP
35 bool
36 select GENERIC_PCI_IOMAP
37
38config GENERIC_IO
39 boolean
40 default n
41
42config STMP_DEVICE
43 bool
44
45config 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
53config 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
61config 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
68config 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
76config CRC32
77 tristate "CRC32/CRC32c functions"
78 default y
79 select BITREVERSE
80 help
81 This option is provided for the case where no in-kernel-tree
82 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.
85
86config 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
96choice
97 prompt "CRC32 implementation"
98 depends on CRC32
99 default CRC32_SLICEBY8
100 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.
104
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
143config 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
151config LIBCRC32C
152 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
153 select CRYPTO
154 select CRYPTO_CRC32C
155 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
162config 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
169config AUDIT_GENERIC
170 bool
171 depends on AUDIT && !AUDIT_ARCH
172 default y
173
174#
175# compression support is select'ed if needed
176#
177config ZLIB_INFLATE
178 tristate
179
180config ZLIB_DEFLATE
181 tristate
182
183config LZO_COMPRESS
184 tristate
185
186config LZO_DECOMPRESS
187 tristate
188
189source "lib/xz/Kconfig"
190
191#
192# These all provide a common interface (hence the apparent duplication with
193# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
194#
195config DECOMPRESS_GZIP
196 select ZLIB_INFLATE
197 tristate
198
199config DECOMPRESS_BZIP2
200 tristate
201
202config DECOMPRESS_LZMA
203 tristate
204
205config DECOMPRESS_XZ
206 select XZ_DEC
207 tristate
208
209config DECOMPRESS_LZO
210 select LZO_DECOMPRESS
211 tristate
212
213#
214# Generic allocator support is selected if needed
215#
216config GENERIC_ALLOCATOR
217 boolean
218
219#
220# 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
237#
238# 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#
277# Textsearch support is select'ed if needed
278#
279config TEXTSEARCH
280 boolean
281
282config TEXTSEARCH_KMP
283 tristate
284
285config TEXTSEARCH_BM
286 tristate
287
288config TEXTSEARCH_FSM
289 tristate
290
291config BTREE
292 boolean
293
294config HAS_IOMEM
295 boolean
296 depends on !NO_IOMEM
297 select GENERIC_IO
298 default y
299
300config HAS_IOPORT
301 boolean
302 depends on HAS_IOMEM && !NO_IOPORT
303 default y
304
305config HAS_DMA
306 boolean
307 depends on !NO_DMA
308 default y
309
310config CHECK_SIGNATURE
311 bool
312
313config 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
320config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
321 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
322 depends on EXPERIMENTAL && BROKEN
323
324config CPU_RMAP
325 bool
326 depends on SMP
327
328config DQL
329 bool
330
331#
332# Netlink attribute parsing support is select'ed if needed
333#
334config NLATTR
335 bool
336
337#
338# Generic 64-bit atomic support is selected if needed
339#
340config GENERIC_ATOMIC64
341 bool
342
343config LRU_CACHE
344 tristate
345
346config AVERAGE
347 bool "Averaging functions"
348 help
349 This option is provided for the case where no in-kernel-tree
350 modules require averaging functions, but a module built outside
351 the kernel tree does. Such modules that use library averaging
352 functions require Y here.
353
354 If unsure, say N.
355
356config CLZ_TAB
357 bool
358
359config CORDIC
360 tristate "CORDIC algorithm"
361 help
362 This option provides an implementation of the CORDIC algorithm;
363 calculations are in fixed point. Module will be called cordic.
364
365config DDR
366 bool "JEDEC DDR data"
367 help
368 Data from JEDEC specs for DDR SDRAM memories,
369 particularly the AC timing parameters and addressing
370 information. This data is useful for drivers handling
371 DDR SDRAM controllers.
372
373config MPILIB
374 tristate
375 select CLZ_TAB
376 help
377 Multiprecision maths library from GnuPG.
378 It is used to implement RSA digital signature verification,
379 which is used by IMA/EVM digital signature extension.
380
381config MPILIB_EXTRA
382 bool
383 depends on MPILIB
384 help
385 Additional sources of multiprecision maths library from GnuPG.
386 This code is unnecessary for RSA digital signature verification,
387 but can be compiled if needed.
388
389config SIGNATURE
390 tristate
391 depends on KEYS && CRYPTO
392 select CRYPTO_SHA1
393 select MPILIB
394 help
395 Digital signature verification. Currently only RSA is supported.
396 Implementation is done using GnuPG MPI library
397
398endmenu