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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 HAVE_ARCH_BITREVERSE
17 bool
18 default n
19 depends on BITREVERSE
20 help
21 This option enables the use of hardware bit-reversal instructions on
22 architectures which support such operations.
23
24config RATIONAL
25 bool
26
27config GENERIC_STRNCPY_FROM_USER
28 bool
29
30config GENERIC_STRNLEN_USER
31 bool
32
33config GENERIC_NET_UTILS
34 bool
35
36config GENERIC_FIND_FIRST_BIT
37 bool
38
39config NO_GENERIC_PCI_IOPORT_MAP
40 bool
41
42config GENERIC_PCI_IOMAP
43 bool
44
45config GENERIC_IOMAP
46 bool
47 select GENERIC_PCI_IOMAP
48
49config GENERIC_IO
50 bool
51 default n
52
53config STMP_DEVICE
54 bool
55
56config ARCH_USE_CMPXCHG_LOCKREF
57 bool
58
59config ARCH_HAS_FAST_MULTIPLIER
60 bool
61
62config CRC_CCITT
63 tristate "CRC-CCITT functions"
64 help
65 This option is provided for the case where no in-kernel-tree
66 modules require CRC-CCITT functions, but a module built outside
67 the kernel tree does. Such modules that use library CRC-CCITT
68 functions require M here.
69
70config CRC16
71 tristate "CRC16 functions"
72 help
73 This option is provided for the case where no in-kernel-tree
74 modules require CRC16 functions, but a module built outside
75 the kernel tree does. Such modules that use library CRC16
76 functions require M here.
77
78config CRC_T10DIF
79 tristate "CRC calculation for the T10 Data Integrity Field"
80 select CRYPTO
81 select CRYPTO_CRCT10DIF
82 help
83 This option is only needed if a module that's not in the
84 kernel tree needs to calculate CRC checks for use with the
85 SCSI data integrity subsystem.
86
87config CRC_ITU_T
88 tristate "CRC ITU-T V.41 functions"
89 help
90 This option is provided for the case where no in-kernel-tree
91 modules require CRC ITU-T V.41 functions, but a module built outside
92 the kernel tree does. Such modules that use library CRC ITU-T V.41
93 functions require M here.
94
95config CRC32
96 tristate "CRC32/CRC32c functions"
97 default y
98 select BITREVERSE
99 help
100 This option is provided for the case where no in-kernel-tree
101 modules require CRC32/CRC32c functions, but a module built outside
102 the kernel tree does. Such modules that use library CRC32/CRC32c
103 functions require M here.
104
105config CRC32_SELFTEST
106 bool "CRC32 perform self test on init"
107 default n
108 depends on CRC32
109 help
110 This option enables the CRC32 library functions to perform a
111 self test on initialization. The self test computes crc32_le
112 and crc32_be over byte strings with random alignment and length
113 and computes the total elapsed time and number of bytes processed.
114
115choice
116 prompt "CRC32 implementation"
117 depends on CRC32
118 default CRC32_SLICEBY8
119 help
120 This option allows a kernel builder to override the default choice
121 of CRC32 algorithm. Choose the default ("slice by 8") unless you
122 know that you need one of the others.
123
124config CRC32_SLICEBY8
125 bool "Slice by 8 bytes"
126 help
127 Calculate checksum 8 bytes at a time with a clever slicing algorithm.
128 This is the fastest algorithm, but comes with a 8KiB lookup table.
129 Most modern processors have enough cache to hold this table without
130 thrashing the cache.
131
132 This is the default implementation choice. Choose this one unless
133 you have a good reason not to.
134
135config CRC32_SLICEBY4
136 bool "Slice by 4 bytes"
137 help
138 Calculate checksum 4 bytes at a time with a clever slicing algorithm.
139 This is a bit slower than slice by 8, but has a smaller 4KiB lookup
140 table.
141
142 Only choose this option if you know what you are doing.
143
144config CRC32_SARWATE
145 bool "Sarwate's Algorithm (one byte at a time)"
146 help
147 Calculate checksum a byte at a time using Sarwate's algorithm. This
148 is not particularly fast, but has a small 256 byte lookup table.
149
150 Only choose this option if you know what you are doing.
151
152config CRC32_BIT
153 bool "Classic Algorithm (one bit at a time)"
154 help
155 Calculate checksum one bit at a time. This is VERY slow, but has
156 no lookup table. This is provided as a debugging option.
157
158 Only choose this option if you are debugging crc32.
159
160endchoice
161
162config CRC7
163 tristate "CRC7 functions"
164 help
165 This option is provided for the case where no in-kernel-tree
166 modules require CRC7 functions, but a module built outside
167 the kernel tree does. Such modules that use library CRC7
168 functions require M here.
169
170config LIBCRC32C
171 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
172 select CRYPTO
173 select CRYPTO_CRC32C
174 help
175 This option is provided for the case where no in-kernel-tree
176 modules require CRC32c functions, but a module built outside the
177 kernel tree does. Such modules that use library CRC32c functions
178 require M here. See Castagnoli93.
179 Module will be libcrc32c.
180
181config CRC8
182 tristate "CRC8 function"
183 help
184 This option provides CRC8 function. Drivers may select this
185 when they need to do cyclic redundancy check according CRC8
186 algorithm. Module will be called crc8.
187
188config AUDIT_GENERIC
189 bool
190 depends on AUDIT && !AUDIT_ARCH
191 default y
192
193config AUDIT_ARCH_COMPAT_GENERIC
194 bool
195 default n
196
197config AUDIT_COMPAT_GENERIC
198 bool
199 depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
200 default y
201
202config RANDOM32_SELFTEST
203 bool "PRNG perform self test on init"
204 default n
205 help
206 This option enables the 32 bit PRNG library functions to perform a
207 self test on initialization.
208
209#
210# compression support is select'ed if needed
211#
212config 842_COMPRESS
213 select CRC32
214 tristate
215
216config 842_DECOMPRESS
217 select CRC32
218 tristate
219
220config ZLIB_INFLATE
221 tristate
222
223config ZLIB_DEFLATE
224 tristate
225 select BITREVERSE
226
227config LZO_COMPRESS
228 tristate
229
230config LZO_DECOMPRESS
231 tristate
232
233config LZ4_COMPRESS
234 tristate
235
236config LZ4HC_COMPRESS
237 tristate
238
239config LZ4_DECOMPRESS
240 tristate
241
242source "lib/xz/Kconfig"
243
244#
245# These all provide a common interface (hence the apparent duplication with
246# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
247#
248config DECOMPRESS_GZIP
249 select ZLIB_INFLATE
250 tristate
251
252config DECOMPRESS_BZIP2
253 tristate
254
255config DECOMPRESS_LZMA
256 tristate
257
258config DECOMPRESS_XZ
259 select XZ_DEC
260 tristate
261
262config DECOMPRESS_LZO
263 select LZO_DECOMPRESS
264 tristate
265
266config DECOMPRESS_LZ4
267 select LZ4_DECOMPRESS
268 tristate
269
270#
271# Generic allocator support is selected if needed
272#
273config GENERIC_ALLOCATOR
274 bool
275
276#
277# reed solomon support is select'ed if needed
278#
279config REED_SOLOMON
280 tristate
281
282config REED_SOLOMON_ENC8
283 bool
284
285config REED_SOLOMON_DEC8
286 bool
287
288config REED_SOLOMON_ENC16
289 bool
290
291config REED_SOLOMON_DEC16
292 bool
293
294#
295# BCH support is selected if needed
296#
297config BCH
298 tristate
299
300config BCH_CONST_PARAMS
301 bool
302 help
303 Drivers may select this option to force specific constant
304 values for parameters 'm' (Galois field order) and 't'
305 (error correction capability). Those specific values must
306 be set by declaring default values for symbols BCH_CONST_M
307 and BCH_CONST_T.
308 Doing so will enable extra compiler optimizations,
309 improving encoding and decoding performance up to 2x for
310 usual (m,t) values (typically such that m*t < 200).
311 When this option is selected, the BCH library supports
312 only a single (m,t) configuration. This is mainly useful
313 for NAND flash board drivers requiring known, fixed BCH
314 parameters.
315
316config BCH_CONST_M
317 int
318 range 5 15
319 help
320 Constant value for Galois field order 'm'. If 'k' is the
321 number of data bits to protect, 'm' should be chosen such
322 that (k + m*t) <= 2**m - 1.
323 Drivers should declare a default value for this symbol if
324 they select option BCH_CONST_PARAMS.
325
326config BCH_CONST_T
327 int
328 help
329 Constant value for error correction capability in bits 't'.
330 Drivers should declare a default value for this symbol if
331 they select option BCH_CONST_PARAMS.
332
333#
334# Textsearch support is select'ed if needed
335#
336config TEXTSEARCH
337 bool
338
339config TEXTSEARCH_KMP
340 tristate
341
342config TEXTSEARCH_BM
343 tristate
344
345config TEXTSEARCH_FSM
346 tristate
347
348config BTREE
349 bool
350
351config INTERVAL_TREE
352 bool
353 help
354 Simple, embeddable, interval-tree. Can find the start of an
355 overlapping range in log(n) time and then iterate over all
356 overlapping nodes. The algorithm is implemented as an
357 augmented rbtree.
358
359 See:
360
361 Documentation/rbtree.txt
362
363 for more information.
364
365config ASSOCIATIVE_ARRAY
366 bool
367 help
368 Generic associative array. Can be searched and iterated over whilst
369 it is being modified. It is also reasonably quick to search and
370 modify. The algorithms are non-recursive, and the trees are highly
371 capacious.
372
373 See:
374
375 Documentation/assoc_array.txt
376
377 for more information.
378
379config HAS_IOMEM
380 bool
381 depends on !NO_IOMEM
382 select GENERIC_IO
383 default y
384
385config HAS_IOPORT_MAP
386 bool
387 depends on HAS_IOMEM && !NO_IOPORT_MAP
388 default y
389
390config HAS_DMA
391 bool
392 depends on !NO_DMA
393 default y
394
395config CHECK_SIGNATURE
396 bool
397
398config CPUMASK_OFFSTACK
399 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
400 help
401 Use dynamic allocation for cpumask_var_t, instead of putting
402 them on the stack. This is a bit more expensive, but avoids
403 stack overflow.
404
405config CPU_RMAP
406 bool
407 depends on SMP
408
409config DQL
410 bool
411
412config GLOB
413 bool
414# This actually supports modular compilation, but the module overhead
415# is ridiculous for the amount of code involved. Until an out-of-tree
416# driver asks for it, we'll just link it directly it into the kernel
417# when required. Since we're ignoring out-of-tree users, there's also
418# no need bother prompting for a manual decision:
419# prompt "glob_match() function"
420 help
421 This option provides a glob_match function for performing
422 simple text pattern matching. It originated in the ATA code
423 to blacklist particular drive models, but other device drivers
424 may need similar functionality.
425
426 All drivers in the Linux kernel tree that require this function
427 should automatically select this option. Say N unless you
428 are compiling an out-of tree driver which tells you that it
429 depends on this.
430
431config GLOB_SELFTEST
432 bool "glob self-test on init"
433 default n
434 depends on GLOB
435 help
436 This option enables a simple self-test of the glob_match
437 function on startup. It is primarily useful for people
438 working on the code to ensure they haven't introduced any
439 regressions.
440
441 It only adds a little bit of code and slows kernel boot (or
442 module load) by a small amount, so you're welcome to play with
443 it, but you probably don't need it.
444
445#
446# Netlink attribute parsing support is select'ed if needed
447#
448config NLATTR
449 bool
450
451#
452# Generic 64-bit atomic support is selected if needed
453#
454config GENERIC_ATOMIC64
455 bool
456
457config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
458 def_bool y if GENERIC_ATOMIC64
459
460config LRU_CACHE
461 tristate
462
463config CLZ_TAB
464 bool
465
466config CORDIC
467 tristate "CORDIC algorithm"
468 help
469 This option provides an implementation of the CORDIC algorithm;
470 calculations are in fixed point. Module will be called cordic.
471
472config DDR
473 bool "JEDEC DDR data"
474 help
475 Data from JEDEC specs for DDR SDRAM memories,
476 particularly the AC timing parameters and addressing
477 information. This data is useful for drivers handling
478 DDR SDRAM controllers.
479
480config IRQ_POLL
481 bool "IRQ polling library"
482 help
483 Helper library to poll interrupt mitigation using polling.
484
485config MPILIB
486 tristate
487 select CLZ_TAB
488 help
489 Multiprecision maths library from GnuPG.
490 It is used to implement RSA digital signature verification,
491 which is used by IMA/EVM digital signature extension.
492
493config SIGNATURE
494 tristate
495 depends on KEYS
496 select CRYPTO
497 select CRYPTO_SHA1
498 select MPILIB
499 help
500 Digital signature verification. Currently only RSA is supported.
501 Implementation is done using GnuPG MPI library
502
503#
504# libfdt files, only selected if needed.
505#
506config LIBFDT
507 bool
508
509config OID_REGISTRY
510 tristate
511 help
512 Enable fast lookup object identifier registry.
513
514config UCS2_STRING
515 tristate
516
517source "lib/fonts/Kconfig"
518
519config SG_SPLIT
520 def_bool n
521 help
522 Provides a helper to split scatterlists into chunks, each chunk being
523 a scatterlist. This should be selected by a driver or an API which
524 whishes to split a scatterlist amongst multiple DMA channels.
525
526#
527# sg chaining option
528#
529
530config ARCH_HAS_SG_CHAIN
531 def_bool n
532
533config ARCH_HAS_PMEM_API
534 bool
535
536config ARCH_HAS_MMIO_FLUSH
537 bool
538
539config STACKDEPOT
540 bool
541 select STACKTRACE
542
543endmenu
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_FIND_FIRST_BIT
20 bool
21
22config CRC_CCITT
23 tristate "CRC-CCITT functions"
24 help
25 This option is provided for the case where no in-kernel-tree
26 modules require CRC-CCITT functions, but a module built outside
27 the kernel tree does. Such modules that use library CRC-CCITT
28 functions require M here.
29
30config CRC16
31 tristate "CRC16 functions"
32 help
33 This option is provided for the case where no in-kernel-tree
34 modules require CRC16 functions, but a module built outside
35 the kernel tree does. Such modules that use library CRC16
36 functions require M here.
37
38config CRC_T10DIF
39 tristate "CRC calculation for the T10 Data Integrity Field"
40 help
41 This option is only needed if a module that's not in the
42 kernel tree needs to calculate CRC checks for use with the
43 SCSI data integrity subsystem.
44
45config CRC_ITU_T
46 tristate "CRC ITU-T V.41 functions"
47 help
48 This option is provided for the case where no in-kernel-tree
49 modules require CRC ITU-T V.41 functions, but a module built outside
50 the kernel tree does. Such modules that use library CRC ITU-T V.41
51 functions require M here.
52
53config CRC32
54 tristate "CRC32 functions"
55 default y
56 select BITREVERSE
57 help
58 This option is provided for the case where no in-kernel-tree
59 modules require CRC32 functions, but a module built outside the
60 kernel tree does. Such modules that use library CRC32 functions
61 require M here.
62
63config CRC7
64 tristate "CRC7 functions"
65 help
66 This option is provided for the case where no in-kernel-tree
67 modules require CRC7 functions, but a module built outside
68 the kernel tree does. Such modules that use library CRC7
69 functions require M here.
70
71config LIBCRC32C
72 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
73 select CRYPTO
74 select CRYPTO_CRC32C
75 help
76 This option is provided for the case where no in-kernel-tree
77 modules require CRC32c functions, but a module built outside the
78 kernel tree does. Such modules that use library CRC32c functions
79 require M here. See Castagnoli93.
80 Module will be libcrc32c.
81
82config CRC8
83 tristate "CRC8 function"
84 help
85 This option provides CRC8 function. Drivers may select this
86 when they need to do cyclic redundancy check according CRC8
87 algorithm. Module will be called crc8.
88
89config AUDIT_GENERIC
90 bool
91 depends on AUDIT && !AUDIT_ARCH
92 default y
93
94#
95# compression support is select'ed if needed
96#
97config ZLIB_INFLATE
98 tristate
99
100config ZLIB_DEFLATE
101 tristate
102
103config LZO_COMPRESS
104 tristate
105
106config LZO_DECOMPRESS
107 tristate
108
109source "lib/xz/Kconfig"
110
111#
112# These all provide a common interface (hence the apparent duplication with
113# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
114#
115config DECOMPRESS_GZIP
116 select ZLIB_INFLATE
117 tristate
118
119config DECOMPRESS_BZIP2
120 tristate
121
122config DECOMPRESS_LZMA
123 tristate
124
125config DECOMPRESS_XZ
126 select XZ_DEC
127 tristate
128
129config DECOMPRESS_LZO
130 select LZO_DECOMPRESS
131 tristate
132
133#
134# Generic allocator support is selected if needed
135#
136config GENERIC_ALLOCATOR
137 boolean
138
139#
140# reed solomon support is select'ed if needed
141#
142config REED_SOLOMON
143 tristate
144
145config REED_SOLOMON_ENC8
146 boolean
147
148config REED_SOLOMON_DEC8
149 boolean
150
151config REED_SOLOMON_ENC16
152 boolean
153
154config REED_SOLOMON_DEC16
155 boolean
156
157#
158# BCH support is selected if needed
159#
160config BCH
161 tristate
162
163config BCH_CONST_PARAMS
164 boolean
165 help
166 Drivers may select this option to force specific constant
167 values for parameters 'm' (Galois field order) and 't'
168 (error correction capability). Those specific values must
169 be set by declaring default values for symbols BCH_CONST_M
170 and BCH_CONST_T.
171 Doing so will enable extra compiler optimizations,
172 improving encoding and decoding performance up to 2x for
173 usual (m,t) values (typically such that m*t < 200).
174 When this option is selected, the BCH library supports
175 only a single (m,t) configuration. This is mainly useful
176 for NAND flash board drivers requiring known, fixed BCH
177 parameters.
178
179config BCH_CONST_M
180 int
181 range 5 15
182 help
183 Constant value for Galois field order 'm'. If 'k' is the
184 number of data bits to protect, 'm' should be chosen such
185 that (k + m*t) <= 2**m - 1.
186 Drivers should declare a default value for this symbol if
187 they select option BCH_CONST_PARAMS.
188
189config BCH_CONST_T
190 int
191 help
192 Constant value for error correction capability in bits 't'.
193 Drivers should declare a default value for this symbol if
194 they select option BCH_CONST_PARAMS.
195
196#
197# Textsearch support is select'ed if needed
198#
199config TEXTSEARCH
200 boolean
201
202config TEXTSEARCH_KMP
203 tristate
204
205config TEXTSEARCH_BM
206 tristate
207
208config TEXTSEARCH_FSM
209 tristate
210
211config BTREE
212 boolean
213
214config HAS_IOMEM
215 boolean
216 depends on !NO_IOMEM
217 default y
218
219config HAS_IOPORT
220 boolean
221 depends on HAS_IOMEM && !NO_IOPORT
222 default y
223
224config HAS_DMA
225 boolean
226 depends on !NO_DMA
227 default y
228
229config CHECK_SIGNATURE
230 bool
231
232config CPUMASK_OFFSTACK
233 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
234 help
235 Use dynamic allocation for cpumask_var_t, instead of putting
236 them on the stack. This is a bit more expensive, but avoids
237 stack overflow.
238
239config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
240 bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
241 depends on EXPERIMENTAL && BROKEN
242
243config CPU_RMAP
244 bool
245 depends on SMP
246
247#
248# Netlink attribute parsing support is select'ed if needed
249#
250config NLATTR
251 bool
252
253#
254# Generic 64-bit atomic support is selected if needed
255#
256config GENERIC_ATOMIC64
257 bool
258
259config LRU_CACHE
260 tristate
261
262config AVERAGE
263 bool "Averaging functions"
264 help
265 This option is provided for the case where no in-kernel-tree
266 modules require averaging functions, but a module built outside
267 the kernel tree does. Such modules that use library averaging
268 functions require Y here.
269
270 If unsure, say N.
271
272config CORDIC
273 tristate "Cordic function"
274 help
275 The option provides arithmetic function using cordic algorithm
276 so its calculations are in fixed point. Modules can select this
277 when they require this function. Module will be called cordic.
278
279config LLIST
280 bool
281
282endmenu