1
2
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 STMP_DEVICE
50 bool
51
52config ARCH_USE_CMPXCHG_LOCKREF
53 bool
54
55config ARCH_HAS_FAST_MULTIPLIER
56 bool
57
58config CRC_CCITT
59 tristate "CRC-CCITT functions"
60 help
61 This option is provided for the case where no in-kernel-tree
62 modules require CRC-CCITT functions, but a module built outside
63 the kernel tree does. Such modules that use library CRC-CCITT
64 functions require M here.
65
66config CRC16
67 tristate "CRC16 functions"
68 help
69 This option is provided for the case where no in-kernel-tree
70 modules require CRC16 functions, but a module built outside
71 the kernel tree does. Such modules that use library CRC16
72 functions require M here.
73
74config CRC_T10DIF
75 tristate "CRC calculation for the T10 Data Integrity Field"
76 select CRYPTO
77 select CRYPTO_CRCT10DIF
78 help
79 This option is only needed if a module that's not in the
80 kernel tree needs to calculate CRC checks for use with the
81 SCSI data integrity subsystem.
82
83config CRC_ITU_T
84 tristate "CRC ITU-T V.41 functions"
85 help
86 This option is provided for the case where no in-kernel-tree
87 modules require CRC ITU-T V.41 functions, but a module built outside
88 the kernel tree does. Such modules that use library CRC ITU-T V.41
89 functions require M here.
90
91config CRC32
92 tristate "CRC32/CRC32c functions"
93 default y
94 select BITREVERSE
95 help
96 This option is provided for the case where no in-kernel-tree
97 modules require CRC32/CRC32c functions, but a module built outside
98 the kernel tree does. Such modules that use library CRC32/CRC32c
99 functions require M here.
100
101config CRC32_SELFTEST
102 tristate "CRC32 perform self test on init"
103 depends on CRC32
104 help
105 This option enables the CRC32 library functions to perform a
106 self test on initialization. The self test computes crc32_le
107 and crc32_be over byte strings with random alignment and length
108 and computes the total elapsed time and number of bytes processed.
109
110choice
111 prompt "CRC32 implementation"
112 depends on CRC32
113 default CRC32_SLICEBY8
114 help
115 This option allows a kernel builder to override the default choice
116 of CRC32 algorithm. Choose the default ("slice by 8") unless you
117 know that you need one of the others.
118
119config CRC32_SLICEBY8
120 bool "Slice by 8 bytes"
121 help
122 Calculate checksum 8 bytes at a time with a clever slicing algorithm.
123 This is the fastest algorithm, but comes with a 8KiB lookup table.
124 Most modern processors have enough cache to hold this table without
125 thrashing the cache.
126
127 This is the default implementation choice. Choose this one unless
128 you have a good reason not to.
129
130config CRC32_SLICEBY4
131 bool "Slice by 4 bytes"
132 help
133 Calculate checksum 4 bytes at a time with a clever slicing algorithm.
134 This is a bit slower than slice by 8, but has a smaller 4KiB lookup
135 table.
136
137 Only choose this option if you know what you are doing.
138
139config CRC32_SARWATE
140 bool "Sarwate's Algorithm (one byte at a time)"
141 help
142 Calculate checksum a byte at a time using Sarwate's algorithm. This
143 is not particularly fast, but has a small 256 byte lookup table.
144
145 Only choose this option if you know what you are doing.
146
147config CRC32_BIT
148 bool "Classic Algorithm (one bit at a time)"
149 help
150 Calculate checksum one bit at a time. This is VERY slow, but has
151 no lookup table. This is provided as a debugging option.
152
153 Only choose this option if you are debugging crc32.
154
155endchoice
156
157config CRC4
158 tristate "CRC4 functions"
159 help
160 This option is provided for the case where no in-kernel-tree
161 modules require CRC4 functions, but a module built outside
162 the kernel tree does. Such modules that use library CRC4
163 functions require M here.
164
165config CRC7
166 tristate "CRC7 functions"
167 help
168 This option is provided for the case where no in-kernel-tree
169 modules require CRC7 functions, but a module built outside
170 the kernel tree does. Such modules that use library CRC7
171 functions require M here.
172
173config LIBCRC32C
174 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
175 select CRYPTO
176 select CRYPTO_CRC32C
177 help
178 This option is provided for the case where no in-kernel-tree
179 modules require CRC32c functions, but a module built outside the
180 kernel tree does. Such modules that use library CRC32c functions
181 require M here. See Castagnoli93.
182 Module will be libcrc32c.
183
184config CRC8
185 tristate "CRC8 function"
186 help
187 This option provides CRC8 function. Drivers may select this
188 when they need to do cyclic redundancy check according CRC8
189 algorithm. Module will be called crc8.
190
191config XXHASH
192 tristate
193
194config AUDIT_GENERIC
195 bool
196 depends on AUDIT && !AUDIT_ARCH
197 default y
198
199config AUDIT_ARCH_COMPAT_GENERIC
200 bool
201 default n
202
203config AUDIT_COMPAT_GENERIC
204 bool
205 depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
206 default y
207
208config RANDOM32_SELFTEST
209 bool "PRNG perform self test on init"
210 default n
211 help
212 This option enables the 32 bit PRNG library functions to perform a
213 self test on initialization.
214
215
216
217
218config 842_COMPRESS
219 select CRC32
220 tristate
221
222config 842_DECOMPRESS
223 select CRC32
224 tristate
225
226config ZLIB_INFLATE
227 tristate
228
229config ZLIB_DEFLATE
230 tristate
231 select BITREVERSE
232
233config LZO_COMPRESS
234 tristate
235
236config LZO_DECOMPRESS
237 tristate
238
239config LZ4_COMPRESS
240 tristate
241
242config LZ4HC_COMPRESS
243 tristate
244
245config LZ4_DECOMPRESS
246 tristate
247
248config ZSTD_COMPRESS
249 select XXHASH
250 tristate
251
252config ZSTD_DECOMPRESS
253 select XXHASH
254 tristate
255
256source "lib/xz/Kconfig"
257
258
259
260
261
262config DECOMPRESS_GZIP
263 select ZLIB_INFLATE
264 tristate
265
266config DECOMPRESS_BZIP2
267 tristate
268
269config DECOMPRESS_LZMA
270 tristate
271
272config DECOMPRESS_XZ
273 select XZ_DEC
274 tristate
275
276config DECOMPRESS_LZO
277 select LZO_DECOMPRESS
278 tristate
279
280config DECOMPRESS_LZ4
281 select LZ4_DECOMPRESS
282 tristate
283
284
285
286
287config GENERIC_ALLOCATOR
288 bool
289
290
291
292
293config REED_SOLOMON
294 tristate
295
296config REED_SOLOMON_ENC8
297 bool
298
299config REED_SOLOMON_DEC8
300 bool
301
302config REED_SOLOMON_ENC16
303 bool
304
305config REED_SOLOMON_DEC16
306 bool
307
308
309
310
311config BCH
312 tristate
313
314config BCH_CONST_PARAMS
315 bool
316 help
317 Drivers may select this option to force specific constant
318 values for parameters 'm' (Galois field order) and 't'
319 (error correction capability). Those specific values must
320 be set by declaring default values for symbols BCH_CONST_M
321 and BCH_CONST_T.
322 Doing so will enable extra compiler optimizations,
323 improving encoding and decoding performance up to 2x for
324 usual (m,t) values (typically such that m*t < 200).
325 When this option is selected, the BCH library supports
326 only a single (m,t) configuration. This is mainly useful
327 for NAND flash board drivers requiring known, fixed BCH
328 parameters.
329
330config BCH_CONST_M
331 int
332 range 5 15
333 help
334 Constant value for Galois field order 'm'. If 'k' is the
335 number of data bits to protect, 'm' should be chosen such
336 that (k + m*t) <= 2**m - 1.
337 Drivers should declare a default value for this symbol if
338 they select option BCH_CONST_PARAMS.
339
340config BCH_CONST_T
341 int
342 help
343 Constant value for error correction capability in bits 't'.
344 Drivers should declare a default value for this symbol if
345 they select option BCH_CONST_PARAMS.
346
347
348
349
350config TEXTSEARCH
351 bool
352
353config TEXTSEARCH_KMP
354 tristate
355
356config TEXTSEARCH_BM
357 tristate
358
359config TEXTSEARCH_FSM
360 tristate
361
362config BTREE
363 bool
364
365config INTERVAL_TREE
366 bool
367 help
368 Simple, embeddable, interval-tree. Can find the start of an
369 overlapping range in log(n) time and then iterate over all
370 overlapping nodes. The algorithm is implemented as an
371 augmented rbtree.
372
373 See:
374
375 Documentation/rbtree.txt
376
377 for more information.
378
379config RADIX_TREE_MULTIORDER
380 bool
381
382config ASSOCIATIVE_ARRAY
383 bool
384 help
385 Generic associative array. Can be searched and iterated over whilst
386 it is being modified. It is also reasonably quick to search and
387 modify. The algorithms are non-recursive, and the trees are highly
388 capacious.
389
390 See:
391
392 Documentation/assoc_array.txt
393
394 for more information.
395
396config HAS_IOMEM
397 bool
398 depends on !NO_IOMEM
399 select GENERIC_IO
400 default y
401
402config HAS_IOPORT_MAP
403 bool
404 depends on HAS_IOMEM && !NO_IOPORT_MAP
405 default y
406
407config HAS_DMA
408 bool
409 depends on !NO_DMA
410 default y
411
412config SGL_ALLOC
413 bool
414 default n
415
416config DMA_DIRECT_OPS
417 bool
418 depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
419 default n
420
421config DMA_VIRT_OPS
422 bool
423 depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
424 default n
425
426config CHECK_SIGNATURE
427 bool
428
429config CPUMASK_OFFSTACK
430 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
431 help
432 Use dynamic allocation for cpumask_var_t, instead of putting
433 them on the stack. This is a bit more expensive, but avoids
434 stack overflow.
435
436config CPU_RMAP
437 bool
438 depends on SMP
439
440config DQL
441 bool
442
443config GLOB
444 bool
445
446
447
448
449
450
451 help
452 This option provides a glob_match function for performing
453 simple text pattern matching. It originated in the ATA code
454 to blacklist particular drive models, but other device drivers
455 may need similar functionality.
456
457 All drivers in the Linux kernel tree that require this function
458 should automatically select this option. Say N unless you
459 are compiling an out-of tree driver which tells you that it
460 depends on this.
461
462config GLOB_SELFTEST
463 tristate "glob self-test on init"
464 depends on GLOB
465 help
466 This option enables a simple self-test of the glob_match
467 function on startup. It is primarily useful for people
468 working on the code to ensure they haven't introduced any
469 regressions.
470
471 It only adds a little bit of code and slows kernel boot (or
472 module load) by a small amount, so you're welcome to play with
473 it, but you probably don't need it.
474
475
476
477
478config NLATTR
479 bool
480
481
482
483
484config GENERIC_ATOMIC64
485 bool
486
487config LRU_CACHE
488 tristate
489
490config CLZ_TAB
491 bool
492
493config CORDIC
494 tristate "CORDIC algorithm"
495 help
496 This option provides an implementation of the CORDIC algorithm;
497 calculations are in fixed point. Module will be called cordic.
498
499config DDR
500 bool "JEDEC DDR data"
501 help
502 Data from JEDEC specs for DDR SDRAM memories,
503 particularly the AC timing parameters and addressing
504 information. This data is useful for drivers handling
505 DDR SDRAM controllers.
506
507config IRQ_POLL
508 bool "IRQ polling library"
509 help
510 Helper library to poll interrupt mitigation using polling.
511
512config MPILIB
513 tristate
514 select CLZ_TAB
515 help
516 Multiprecision maths library from GnuPG.
517 It is used to implement RSA digital signature verification,
518 which is used by IMA/EVM digital signature extension.
519
520config SIGNATURE
521 tristate
522 depends on KEYS
523 select CRYPTO
524 select CRYPTO_SHA1
525 select MPILIB
526 help
527 Digital signature verification. Currently only RSA is supported.
528 Implementation is done using GnuPG MPI library
529
530
531
532
533config LIBFDT
534 bool
535
536config OID_REGISTRY
537 tristate
538 help
539 Enable fast lookup object identifier registry.
540
541config UCS2_STRING
542 tristate
543
544source "lib/fonts/Kconfig"
545
546config SG_SPLIT
547 def_bool n
548 help
549 Provides a helper to split scatterlists into chunks, each chunk being
550 a scatterlist. This should be selected by a driver or an API which
551 whishes to split a scatterlist amongst multiple DMA channels.
552
553config SG_POOL
554 def_bool n
555 help
556 Provides a helper to allocate chained scatterlists. This should be
557 selected by a driver or an API which whishes to allocate chained
558 scatterlist.
559
560
561
562
563
564config ARCH_HAS_SG_CHAIN
565 def_bool n
566
567config ARCH_HAS_PMEM_API
568 bool
569
570config ARCH_HAS_UACCESS_FLUSHCACHE
571 bool
572
573config STACKDEPOT
574 bool
575 select STACKTRACE
576
577config SBITMAP
578 bool
579
580config PARMAN
581 tristate "parman" if COMPILE_TEST
582
583config PRIME_NUMBERS
584 tristate
585
586config STRING_SELFTEST
587 tristate "Test string functions"
588
589endmenu
590
591config GENERIC_ASHLDI3
592 bool
593
594config GENERIC_ASHRDI3
595 bool
596
597config GENERIC_LSHRDI3
598 bool
599
600config GENERIC_MULDI3
601 bool
602
603config GENERIC_CMPDI2
604 bool
605
606config GENERIC_UCMPDI2
607 bool
608
