]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | # |
2 | # Library configuration | |
3 | # | |
4 | ||
4370aa4a LJ |
5 | config BINARY_PRINTF |
6 | def_bool n | |
7 | ||
1da177e4 LT |
8 | menu "Library routines" |
9 | ||
f5e70d0f DW |
10 | config RAID6_PQ |
11 | tristate | |
12 | ||
a5cfc1ec AM |
13 | config BITREVERSE |
14 | tristate | |
15 | ||
556d2f05 | 16 | config HAVE_ARCH_BITREVERSE |
841c0090 | 17 | bool |
556d2f05 YW |
18 | default n |
19 | depends on BITREVERSE | |
20 | help | |
9e522c0d AM |
21 | This option enables the use of hardware bit-reversal instructions on |
22 | architectures which support such operations. | |
556d2f05 | 23 | |
8759ef32 | 24 | config RATIONAL |
6341e62b | 25 | bool |
8759ef32 | 26 | |
2922585b DM |
27 | config GENERIC_STRNCPY_FROM_USER |
28 | bool | |
29 | ||
a08c5356 LT |
30 | config GENERIC_STRNLEN_USER |
31 | bool | |
32 | ||
4cd5773a AS |
33 | config GENERIC_NET_UTILS |
34 | bool | |
35 | ||
19870def | 36 | config GENERIC_FIND_FIRST_BIT |
9ba16087 | 37 | bool |
19870def | 38 | |
b923650b MT |
39 | config NO_GENERIC_PCI_IOPORT_MAP |
40 | bool | |
41 | ||
66eab4df MT |
42 | config GENERIC_PCI_IOMAP |
43 | bool | |
44 | ||
4673ca8e MT |
45 | config GENERIC_IOMAP |
46 | bool | |
66eab4df | 47 | select GENERIC_PCI_IOMAP |
4673ca8e | 48 | |
4ccf4bea WS |
49 | config STMP_DEVICE |
50 | bool | |
22b361d1 | 51 | |
bc08b449 LT |
52 | config ARCH_USE_CMPXCHG_LOCKREF |
53 | bool | |
54 | ||
72d93104 LT |
55 | config ARCH_HAS_FAST_MULTIPLIER |
56 | bool | |
57 | ||
1da177e4 LT |
58 | config 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 | ||
7657ec1f EP |
66 | config 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 | ||
f11f594e MP |
74 | config CRC_T10DIF |
75 | tristate "CRC calculation for the T10 Data Integrity Field" | |
68411521 HX |
76 | select CRYPTO |
77 | select CRYPTO_CRCT10DIF | |
f11f594e MP |
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 | ||
3e7cbae7 ID |
83 | config 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 | ||
1da177e4 | 91 | config CRC32 |
46c5801e | 92 | tristate "CRC32/CRC32c functions" |
1da177e4 | 93 | default y |
906d66df | 94 | select BITREVERSE |
1da177e4 LT |
95 | help |
96 | This option is provided for the case where no in-kernel-tree | |
46c5801e DW |
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. | |
1da177e4 | 100 | |
3863ef31 | 101 | config CRC32_SELFTEST |
5fb7f874 | 102 | tristate "CRC32 perform self test on init" |
3863ef31 BP |
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 | ||
5cde7656 DW |
110 | choice |
111 | prompt "CRC32 implementation" | |
112 | depends on CRC32 | |
113 | default CRC32_SLICEBY8 | |
82edb4ba DW |
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. | |
5cde7656 DW |
118 | |
119 | config 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 | ||
130 | config 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 | ||
139 | config 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 | ||
147 | config 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 | ||
155 | endchoice | |
156 | ||
0cbaa448 JK |
157 | config 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 | ||
ad241528 JN |
165 | config 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 | ||
1da177e4 LT |
173 | config LIBCRC32C |
174 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
93027354 | 175 | select CRYPTO |
69c35efc | 176 | select CRYPTO_CRC32C |
1da177e4 LT |
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 | ||
7150962d AS |
184 | config 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 | ||
5d240522 NT |
191 | config XXHASH |
192 | tristate | |
193 | ||
e65e1fc2 AV |
194 | config AUDIT_GENERIC |
195 | bool | |
196 | depends on AUDIT && !AUDIT_ARCH | |
197 | default y | |
198 | ||
4b588411 AT |
199 | config AUDIT_ARCH_COMPAT_GENERIC |
200 | bool | |
201 | default n | |
202 | ||
203 | config AUDIT_COMPAT_GENERIC | |
204 | bool | |
205 | depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT | |
206 | default y | |
207 | ||
a6a9c0f1 DB |
208 | config 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 | ||
1da177e4 LT |
215 | # |
216 | # compression support is select'ed if needed | |
217 | # | |
2da572c9 | 218 | config 842_COMPRESS |
5b571677 | 219 | select CRC32 |
2da572c9 DS |
220 | tristate |
221 | ||
222 | config 842_DECOMPRESS | |
5b571677 | 223 | select CRC32 |
2da572c9 DS |
224 | tristate |
225 | ||
1da177e4 LT |
226 | config ZLIB_INFLATE |
227 | tristate | |
228 | ||
229 | config ZLIB_DEFLATE | |
230 | tristate | |
1fd4e5c3 | 231 | select BITREVERSE |
1da177e4 | 232 | |
64c70b1c RP |
233 | config LZO_COMPRESS |
234 | tristate | |
235 | ||
236 | config LZO_DECOMPRESS | |
237 | tristate | |
238 | ||
c72ac7a1 CM |
239 | config LZ4_COMPRESS |
240 | tristate | |
241 | ||
242 | config LZ4HC_COMPRESS | |
243 | tristate | |
244 | ||
e76e1fdf KL |
245 | config LZ4_DECOMPRESS |
246 | tristate | |
247 | ||
73f3d1b4 NT |
248 | config ZSTD_COMPRESS |
249 | select XXHASH | |
250 | tristate | |
251 | ||
252 | config ZSTD_DECOMPRESS | |
253 | select XXHASH | |
254 | tristate | |
255 | ||
24fa0402 LC |
256 | source "lib/xz/Kconfig" |
257 | ||
c8531ab3 PA |
258 | # |
259 | # These all provide a common interface (hence the apparent duplication with | |
260 | # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) | |
261 | # | |
262 | config DECOMPRESS_GZIP | |
7856a16e | 263 | select ZLIB_INFLATE |
c8531ab3 PA |
264 | tristate |
265 | ||
266 | config DECOMPRESS_BZIP2 | |
267 | tristate | |
268 | ||
269 | config DECOMPRESS_LZMA | |
270 | tristate | |
271 | ||
3ebe1243 LC |
272 | config DECOMPRESS_XZ |
273 | select XZ_DEC | |
274 | tristate | |
275 | ||
cacb246f AT |
276 | config DECOMPRESS_LZO |
277 | select LZO_DECOMPRESS | |
278 | tristate | |
279 | ||
e76e1fdf KL |
280 | config DECOMPRESS_LZ4 |
281 | select LZ4_DECOMPRESS | |
282 | tristate | |
283 | ||
f14f75b8 JS |
284 | # |
285 | # Generic allocator support is selected if needed | |
286 | # | |
287 | config GENERIC_ALLOCATOR | |
6341e62b | 288 | bool |
f14f75b8 | 289 | |
1da177e4 LT |
290 | # |
291 | # reed solomon support is select'ed if needed | |
292 | # | |
293 | config REED_SOLOMON | |
294 | tristate | |
295 | ||
296 | config REED_SOLOMON_ENC8 | |
6341e62b | 297 | bool |
1da177e4 LT |
298 | |
299 | config REED_SOLOMON_DEC8 | |
6341e62b | 300 | bool |
1da177e4 LT |
301 | |
302 | config REED_SOLOMON_ENC16 | |
6341e62b | 303 | bool |
1da177e4 LT |
304 | |
305 | config REED_SOLOMON_DEC16 | |
6341e62b | 306 | bool |
1da177e4 | 307 | |
437aa565 ID |
308 | # |
309 | # BCH support is selected if needed | |
310 | # | |
311 | config BCH | |
312 | tristate | |
313 | ||
314 | config BCH_CONST_PARAMS | |
6341e62b | 315 | bool |
437aa565 ID |
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 | ||
330 | config 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 | ||
340 | config 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 | ||
f7704347 DM |
347 | # |
348 | # Textsearch support is select'ed if needed | |
349 | # | |
2de4ff7b | 350 | config TEXTSEARCH |
6341e62b | 351 | bool |
1da177e4 | 352 | |
df3fb93a | 353 | config TEXTSEARCH_KMP |
f7704347 | 354 | tristate |
df3fb93a | 355 | |
8082e4ed | 356 | config TEXTSEARCH_BM |
29cb9f9c | 357 | tristate |
8082e4ed | 358 | |
6408f79c | 359 | config TEXTSEARCH_FSM |
f7704347 | 360 | tristate |
6408f79c | 361 | |
5db53f3e | 362 | config BTREE |
6341e62b | 363 | bool |
5db53f3e | 364 | |
a88cc108 | 365 | config INTERVAL_TREE |
6341e62b | 366 | bool |
a88cc108 CW |
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 | ||
57578c2e MW |
379 | config RADIX_TREE_MULTIORDER |
380 | bool | |
381 | ||
3cb98950 DH |
382 | config 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 | ||
5ea81769 | 396 | config HAS_IOMEM |
6341e62b | 397 | bool |
5ea81769 | 398 | depends on !NO_IOMEM |
087fafd1 | 399 | select GENERIC_IO |
5ea81769 AV |
400 | default y |
401 | ||
ce816fa8 | 402 | config HAS_IOPORT_MAP |
6341e62b | 403 | bool |
ce816fa8 | 404 | depends on HAS_IOMEM && !NO_IOPORT_MAP |
ee36c2bf AV |
405 | default y |
406 | ||
411f0f3e | 407 | config HAS_DMA |
6341e62b | 408 | bool |
411f0f3e HC |
409 | depends on !NO_DMA |
410 | default y | |
411 | ||
7844572c BVA |
412 | config DMA_NOOP_OPS |
413 | bool | |
414 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
415 | default n | |
416 | ||
551199ac BVA |
417 | config DMA_VIRT_OPS |
418 | bool | |
419 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
420 | default n | |
421 | ||
928923c7 GU |
422 | config CHECK_SIGNATURE |
423 | bool | |
424 | ||
aab46da0 RR |
425 | config CPUMASK_OFFSTACK |
426 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS | |
427 | help | |
428 | Use dynamic allocation for cpumask_var_t, instead of putting | |
429 | them on the stack. This is a bit more expensive, but avoids | |
430 | stack overflow. | |
431 | ||
c39649c3 BH |
432 | config CPU_RMAP |
433 | bool | |
434 | depends on SMP | |
435 | ||
75957ba3 TH |
436 | config DQL |
437 | bool | |
438 | ||
b0125085 GS |
439 | config GLOB |
440 | bool | |
441 | # This actually supports modular compilation, but the module overhead | |
442 | # is ridiculous for the amount of code involved. Until an out-of-tree | |
443 | # driver asks for it, we'll just link it directly it into the kernel | |
444 | # when required. Since we're ignoring out-of-tree users, there's also | |
445 | # no need bother prompting for a manual decision: | |
446 | # prompt "glob_match() function" | |
447 | help | |
448 | This option provides a glob_match function for performing | |
449 | simple text pattern matching. It originated in the ATA code | |
450 | to blacklist particular drive models, but other device drivers | |
451 | may need similar functionality. | |
452 | ||
453 | All drivers in the Linux kernel tree that require this function | |
454 | should automatically select this option. Say N unless you | |
455 | are compiling an out-of tree driver which tells you that it | |
456 | depends on this. | |
457 | ||
5f9be824 | 458 | config GLOB_SELFTEST |
ba95b045 | 459 | tristate "glob self-test on init" |
5f9be824 GS |
460 | depends on GLOB |
461 | help | |
462 | This option enables a simple self-test of the glob_match | |
463 | function on startup. It is primarily useful for people | |
464 | working on the code to ensure they haven't introduced any | |
465 | regressions. | |
466 | ||
467 | It only adds a little bit of code and slows kernel boot (or | |
468 | module load) by a small amount, so you're welcome to play with | |
469 | it, but you probably don't need it. | |
470 | ||
e9cc8bdd GU |
471 | # |
472 | # Netlink attribute parsing support is select'ed if needed | |
473 | # | |
474 | config NLATTR | |
475 | bool | |
476 | ||
09d4e0ed PM |
477 | # |
478 | # Generic 64-bit atomic support is selected if needed | |
479 | # | |
480 | config GENERIC_ATOMIC64 | |
481 | bool | |
482 | ||
b411b363 PR |
483 | config LRU_CACHE |
484 | tristate | |
485 | ||
c6df4b17 DM |
486 | config CLZ_TAB |
487 | bool | |
488 | ||
10f8113e | 489 | config CORDIC |
d89ce936 | 490 | tristate "CORDIC algorithm" |
10f8113e | 491 | help |
435a95c5 MW |
492 | This option provides an implementation of the CORDIC algorithm; |
493 | calculations are in fixed point. Module will be called cordic. | |
10f8113e | 494 | |
9c1c21a0 A |
495 | config DDR |
496 | bool "JEDEC DDR data" | |
497 | help | |
498 | Data from JEDEC specs for DDR SDRAM memories, | |
499 | particularly the AC timing parameters and addressing | |
500 | information. This data is useful for drivers handling | |
501 | DDR SDRAM controllers. | |
502 | ||
511cbce2 CH |
503 | config IRQ_POLL |
504 | bool "IRQ polling library" | |
505 | help | |
506 | Helper library to poll interrupt mitigation using polling. | |
507 | ||
d9c46b18 | 508 | config MPILIB |
2e5f094b | 509 | tristate |
c6df4b17 | 510 | select CLZ_TAB |
d9c46b18 DK |
511 | help |
512 | Multiprecision maths library from GnuPG. | |
513 | It is used to implement RSA digital signature verification, | |
514 | which is used by IMA/EVM digital signature extension. | |
515 | ||
5e8898e9 | 516 | config SIGNATURE |
2e5f094b | 517 | tristate |
0d1f64f6 DK |
518 | depends on KEYS |
519 | select CRYPTO | |
be440ec7 | 520 | select CRYPTO_SHA1 |
051dbb91 DK |
521 | select MPILIB |
522 | help | |
523 | Digital signature verification. Currently only RSA is supported. | |
524 | Implementation is done using GnuPG MPI library | |
525 | ||
ab253839 DD |
526 | # |
527 | # libfdt files, only selected if needed. | |
528 | # | |
529 | config LIBFDT | |
530 | bool | |
531 | ||
a77ad6ea DH |
532 | config OID_REGISTRY |
533 | tristate | |
534 | help | |
535 | Enable fast lookup object identifier registry. | |
536 | ||
0635eb8a MG |
537 | config UCS2_STRING |
538 | tristate | |
539 | ||
ee89bd6b GU |
540 | source "lib/fonts/Kconfig" |
541 | ||
f8bcbe62 RJ |
542 | config SG_SPLIT |
543 | def_bool n | |
544 | help | |
7f7e92f7 GU |
545 | Provides a helper to split scatterlists into chunks, each chunk being |
546 | a scatterlist. This should be selected by a driver or an API which | |
547 | whishes to split a scatterlist amongst multiple DMA channels. | |
f8bcbe62 | 548 | |
9b1d6c89 ML |
549 | config SG_POOL |
550 | def_bool n | |
551 | help | |
552 | Provides a helper to allocate chained scatterlists. This should be | |
553 | selected by a driver or an API which whishes to allocate chained | |
554 | scatterlist. | |
555 | ||
308c09f1 LA |
556 | # |
557 | # sg chaining option | |
558 | # | |
559 | ||
560 | config ARCH_HAS_SG_CHAIN | |
561 | def_bool n | |
562 | ||
61031952 RZ |
563 | config ARCH_HAS_PMEM_API |
564 | bool | |
565 | ||
0aed55af DW |
566 | config ARCH_HAS_UACCESS_FLUSHCACHE |
567 | bool | |
568 | ||
cd11016e AP |
569 | config STACKDEPOT |
570 | bool | |
571 | select STACKTRACE | |
572 | ||
88459642 OS |
573 | config SBITMAP |
574 | bool | |
575 | ||
44091d29 | 576 | config PARMAN |
9d25af69 | 577 | tristate "parman" if COMPILE_TEST |
44091d29 | 578 | |
cf4a7207 | 579 | config PRIME_NUMBERS |
64a57719 | 580 | tristate |
cf4a7207 | 581 | |
03270c13 | 582 | config STRING_SELFTEST |
d6b28e09 | 583 | tristate "Test string functions" |
03270c13 | 584 | |
2de4ff7b | 585 | endmenu |
b35cd988 PD |
586 | |
587 | config GENERIC_ASHLDI3 | |
588 | bool | |
589 | ||
590 | config GENERIC_ASHRDI3 | |
591 | bool | |
592 | ||
593 | config GENERIC_LSHRDI3 | |
594 | bool | |
595 | ||
596 | config GENERIC_MULDI3 | |
597 | bool | |
598 | ||
599 | config GENERIC_CMPDI2 | |
600 | bool | |
601 | ||
602 | config GENERIC_UCMPDI2 | |
603 | bool |