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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 XXHASH
189 tristate
190
191config AUDIT_GENERIC
192 bool
193 depends on AUDIT && !AUDIT_ARCH
194 default y
195
196config AUDIT_ARCH_COMPAT_GENERIC
197 bool
198 default n
199
200config AUDIT_COMPAT_GENERIC
201 bool
202 depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
203 default y
204
205config RANDOM32_SELFTEST
206 bool "PRNG perform self test on init"
207 default n
208 help
209 This option enables the 32 bit PRNG library functions to perform a
210 self test on initialization.
211
212#
213# compression support is select'ed if needed
214#
215config 842_COMPRESS
216 select CRC32
217 tristate
218
219config 842_DECOMPRESS
220 select CRC32
221 tristate
222
223config ZLIB_INFLATE
224 tristate
225
226config ZLIB_DEFLATE
227 tristate
228 select BITREVERSE
229
230config LZO_COMPRESS
231 tristate
232
233config LZO_DECOMPRESS
234 tristate
235
236config LZ4_COMPRESS
237 tristate
238
239config LZ4HC_COMPRESS
240 tristate
241
242config LZ4_DECOMPRESS
243 tristate
244
245config ZSTD_COMPRESS
246 select XXHASH
247 tristate
248
249config ZSTD_DECOMPRESS
250 select XXHASH
251 tristate
252
253source "lib/xz/Kconfig"
254
255#
256# These all provide a common interface (hence the apparent duplication with
257# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
258#
259config DECOMPRESS_GZIP
260 select ZLIB_INFLATE
261 tristate
262
263config DECOMPRESS_BZIP2
264 tristate
265
266config DECOMPRESS_LZMA
267 tristate
268
269config DECOMPRESS_XZ
270 select XZ_DEC
271 tristate
272
273config DECOMPRESS_LZO
274 select LZO_DECOMPRESS
275 tristate
276
277config DECOMPRESS_LZ4
278 select LZ4_DECOMPRESS
279 tristate
280
281#
282# Generic allocator support is selected if needed
283#
284config GENERIC_ALLOCATOR
285 bool
286
287#
288# reed solomon support is select'ed if needed
289#
290config REED_SOLOMON
291 tristate
292
293config REED_SOLOMON_ENC8
294 bool
295
296config REED_SOLOMON_DEC8
297 bool
298
299config REED_SOLOMON_ENC16
300 bool
301
302config REED_SOLOMON_DEC16
303 bool
304
305#
306# BCH support is selected if needed
307#
308config BCH
309 tristate
310
311config BCH_CONST_PARAMS
312 bool
313 help
314 Drivers may select this option to force specific constant
315 values for parameters 'm' (Galois field order) and 't'
316 (error correction capability). Those specific values must
317 be set by declaring default values for symbols BCH_CONST_M
318 and BCH_CONST_T.
319 Doing so will enable extra compiler optimizations,
320 improving encoding and decoding performance up to 2x for
321 usual (m,t) values (typically such that m*t < 200).
322 When this option is selected, the BCH library supports
323 only a single (m,t) configuration. This is mainly useful
324 for NAND flash board drivers requiring known, fixed BCH
325 parameters.
326
327config BCH_CONST_M
328 int
329 range 5 15
330 help
331 Constant value for Galois field order 'm'. If 'k' is the
332 number of data bits to protect, 'm' should be chosen such
333 that (k + m*t) <= 2**m - 1.
334 Drivers should declare a default value for this symbol if
335 they select option BCH_CONST_PARAMS.
336
337config BCH_CONST_T
338 int
339 help
340 Constant value for error correction capability in bits 't'.
341 Drivers should declare a default value for this symbol if
342 they select option BCH_CONST_PARAMS.
343
344#
345# Textsearch support is select'ed if needed
346#
347config TEXTSEARCH
348 bool
349
350config TEXTSEARCH_KMP
351 tristate
352
353config TEXTSEARCH_BM
354 tristate
355
356config TEXTSEARCH_FSM
357 tristate
358
359config BTREE
360 bool
361
362config INTERVAL_TREE
363 bool
364 help
365 Simple, embeddable, interval-tree. Can find the start of an
366 overlapping range in log(n) time and then iterate over all
367 overlapping nodes. The algorithm is implemented as an
368 augmented rbtree.
369
370 See:
371
372 Documentation/rbtree.txt
373
374 for more information.
375
376config RADIX_TREE_MULTIORDER
377 bool
378
379config ASSOCIATIVE_ARRAY
380 bool
381 help
382 Generic associative array. Can be searched and iterated over whilst
383 it is being modified. It is also reasonably quick to search and
384 modify. The algorithms are non-recursive, and the trees are highly
385 capacious.
386
387 See:
388
389 Documentation/assoc_array.txt
390
391 for more information.
392
393config HAS_IOMEM
394 bool
395 depends on !NO_IOMEM
396 select GENERIC_IO
397 default y
398
399config HAS_IOPORT_MAP
400 bool
401 depends on HAS_IOMEM && !NO_IOPORT_MAP
402 default y
403
404config HAS_DMA
405 bool
406 depends on !NO_DMA
407 default y
408
409config CHECK_SIGNATURE
410 bool
411
412config CPUMASK_OFFSTACK
413 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
414 help
415 Use dynamic allocation for cpumask_var_t, instead of putting
416 them on the stack. This is a bit more expensive, but avoids
417 stack overflow.
418
419config CPU_RMAP
420 bool
421 depends on SMP
422
423config DQL
424 bool
425
426config GLOB
427 bool
428# This actually supports modular compilation, but the module overhead
429# is ridiculous for the amount of code involved. Until an out-of-tree
430# driver asks for it, we'll just link it directly it into the kernel
431# when required. Since we're ignoring out-of-tree users, there's also
432# no need bother prompting for a manual decision:
433# prompt "glob_match() function"
434 help
435 This option provides a glob_match function for performing
436 simple text pattern matching. It originated in the ATA code
437 to blacklist particular drive models, but other device drivers
438 may need similar functionality.
439
440 All drivers in the Linux kernel tree that require this function
441 should automatically select this option. Say N unless you
442 are compiling an out-of tree driver which tells you that it
443 depends on this.
444
445config GLOB_SELFTEST
446 bool "glob self-test on init"
447 default n
448 depends on GLOB
449 help
450 This option enables a simple self-test of the glob_match
451 function on startup. It is primarily useful for people
452 working on the code to ensure they haven't introduced any
453 regressions.
454
455 It only adds a little bit of code and slows kernel boot (or
456 module load) by a small amount, so you're welcome to play with
457 it, but you probably don't need it.
458
459#
460# Netlink attribute parsing support is select'ed if needed
461#
462config NLATTR
463 bool
464
465#
466# Generic 64-bit atomic support is selected if needed
467#
468config GENERIC_ATOMIC64
469 bool
470
471config LRU_CACHE
472 tristate
473
474config CLZ_TAB
475 bool
476
477config CORDIC
478 tristate "CORDIC algorithm"
479 help
480 This option provides an implementation of the CORDIC algorithm;
481 calculations are in fixed point. Module will be called cordic.
482
483config DDR
484 bool "JEDEC DDR data"
485 help
486 Data from JEDEC specs for DDR SDRAM memories,
487 particularly the AC timing parameters and addressing
488 information. This data is useful for drivers handling
489 DDR SDRAM controllers.
490
491config IRQ_POLL
492 bool "IRQ polling library"
493 help
494 Helper library to poll interrupt mitigation using polling.
495
496config MPILIB
497 tristate
498 select CLZ_TAB
499 help
500 Multiprecision maths library from GnuPG.
501 It is used to implement RSA digital signature verification,
502 which is used by IMA/EVM digital signature extension.
503
504config SIGNATURE
505 tristate
506 depends on KEYS
507 select CRYPTO
508 select CRYPTO_SHA1
509 select MPILIB
510 help
511 Digital signature verification. Currently only RSA is supported.
512 Implementation is done using GnuPG MPI library
513
514#
515# libfdt files, only selected if needed.
516#
517config LIBFDT
518 bool
519
520config OID_REGISTRY
521 tristate
522 help
523 Enable fast lookup object identifier registry.
524
525config UCS2_STRING
526 tristate
527
528source "lib/fonts/Kconfig"
529
530config SG_SPLIT
531 def_bool n
532 help
533 Provides a helper to split scatterlists into chunks, each chunk being
534 a scatterlist. This should be selected by a driver or an API which
535 whishes to split a scatterlist amongst multiple DMA channels.
536
537config SG_POOL
538 def_bool n
539 help
540 Provides a helper to allocate chained scatterlists. This should be
541 selected by a driver or an API which whishes to allocate chained
542 scatterlist.
543
544#
545# sg chaining option
546#
547
548config ARCH_HAS_SG_CHAIN
549 def_bool n
550
551config ARCH_HAS_PMEM_API
552 bool
553
554config ARCH_HAS_MMIO_FLUSH
555 bool
556
557config STACKDEPOT
558 bool
559 select STACKTRACE
560
561config SBITMAP
562 bool
563
564endmenu
565
generated by cgit at 2024-05-18 14:18:39 (GMT)