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Commit | Line | Data |
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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 | |
087fafd1 | 49 | config GENERIC_IO |
6341e62b | 50 | bool |
087fafd1 RW |
51 | default n |
52 | ||
4ccf4bea WS |
53 | config STMP_DEVICE |
54 | bool | |
22b361d1 | 55 | |
bc08b449 LT |
56 | config ARCH_USE_CMPXCHG_LOCKREF |
57 | bool | |
58 | ||
72d93104 LT |
59 | config ARCH_HAS_FAST_MULTIPLIER |
60 | bool | |
61 | ||
1da177e4 LT |
62 | config 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 | ||
7657ec1f EP |
70 | config 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 | ||
f11f594e MP |
78 | config CRC_T10DIF |
79 | tristate "CRC calculation for the T10 Data Integrity Field" | |
68411521 HX |
80 | select CRYPTO |
81 | select CRYPTO_CRCT10DIF | |
f11f594e MP |
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 | ||
3e7cbae7 ID |
87 | config 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 | ||
1da177e4 | 95 | config CRC32 |
46c5801e | 96 | tristate "CRC32/CRC32c functions" |
1da177e4 | 97 | default y |
906d66df | 98 | select BITREVERSE |
1da177e4 LT |
99 | help |
100 | This option is provided for the case where no in-kernel-tree | |
46c5801e DW |
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. | |
1da177e4 | 104 | |
3863ef31 | 105 | config CRC32_SELFTEST |
5fb7f874 | 106 | tristate "CRC32 perform self test on init" |
3863ef31 BP |
107 | depends on CRC32 |
108 | help | |
109 | This option enables the CRC32 library functions to perform a | |
110 | self test on initialization. The self test computes crc32_le | |
111 | and crc32_be over byte strings with random alignment and length | |
112 | and computes the total elapsed time and number of bytes processed. | |
113 | ||
5cde7656 DW |
114 | choice |
115 | prompt "CRC32 implementation" | |
116 | depends on CRC32 | |
117 | default CRC32_SLICEBY8 | |
82edb4ba DW |
118 | help |
119 | This option allows a kernel builder to override the default choice | |
120 | of CRC32 algorithm. Choose the default ("slice by 8") unless you | |
121 | know that you need one of the others. | |
5cde7656 DW |
122 | |
123 | config CRC32_SLICEBY8 | |
124 | bool "Slice by 8 bytes" | |
125 | help | |
126 | Calculate checksum 8 bytes at a time with a clever slicing algorithm. | |
127 | This is the fastest algorithm, but comes with a 8KiB lookup table. | |
128 | Most modern processors have enough cache to hold this table without | |
129 | thrashing the cache. | |
130 | ||
131 | This is the default implementation choice. Choose this one unless | |
132 | you have a good reason not to. | |
133 | ||
134 | config CRC32_SLICEBY4 | |
135 | bool "Slice by 4 bytes" | |
136 | help | |
137 | Calculate checksum 4 bytes at a time with a clever slicing algorithm. | |
138 | This is a bit slower than slice by 8, but has a smaller 4KiB lookup | |
139 | table. | |
140 | ||
141 | Only choose this option if you know what you are doing. | |
142 | ||
143 | config CRC32_SARWATE | |
144 | bool "Sarwate's Algorithm (one byte at a time)" | |
145 | help | |
146 | Calculate checksum a byte at a time using Sarwate's algorithm. This | |
147 | is not particularly fast, but has a small 256 byte lookup table. | |
148 | ||
149 | Only choose this option if you know what you are doing. | |
150 | ||
151 | config CRC32_BIT | |
152 | bool "Classic Algorithm (one bit at a time)" | |
153 | help | |
154 | Calculate checksum one bit at a time. This is VERY slow, but has | |
155 | no lookup table. This is provided as a debugging option. | |
156 | ||
157 | Only choose this option if you are debugging crc32. | |
158 | ||
159 | endchoice | |
160 | ||
0cbaa448 JK |
161 | config CRC4 |
162 | tristate "CRC4 functions" | |
163 | help | |
164 | This option is provided for the case where no in-kernel-tree | |
165 | modules require CRC4 functions, but a module built outside | |
166 | the kernel tree does. Such modules that use library CRC4 | |
167 | functions require M here. | |
168 | ||
ad241528 JN |
169 | config CRC7 |
170 | tristate "CRC7 functions" | |
171 | help | |
172 | This option is provided for the case where no in-kernel-tree | |
173 | modules require CRC7 functions, but a module built outside | |
174 | the kernel tree does. Such modules that use library CRC7 | |
175 | functions require M here. | |
176 | ||
1da177e4 LT |
177 | config LIBCRC32C |
178 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
93027354 | 179 | select CRYPTO |
69c35efc | 180 | select CRYPTO_CRC32C |
1da177e4 LT |
181 | help |
182 | This option is provided for the case where no in-kernel-tree | |
183 | modules require CRC32c functions, but a module built outside the | |
184 | kernel tree does. Such modules that use library CRC32c functions | |
185 | require M here. See Castagnoli93. | |
186 | Module will be libcrc32c. | |
187 | ||
7150962d AS |
188 | config CRC8 |
189 | tristate "CRC8 function" | |
190 | help | |
191 | This option provides CRC8 function. Drivers may select this | |
192 | when they need to do cyclic redundancy check according CRC8 | |
193 | algorithm. Module will be called crc8. | |
194 | ||
5d240522 NT |
195 | config XXHASH |
196 | tristate | |
197 | ||
e65e1fc2 AV |
198 | config AUDIT_GENERIC |
199 | bool | |
200 | depends on AUDIT && !AUDIT_ARCH | |
201 | default y | |
202 | ||
4b588411 AT |
203 | config AUDIT_ARCH_COMPAT_GENERIC |
204 | bool | |
205 | default n | |
206 | ||
207 | config AUDIT_COMPAT_GENERIC | |
208 | bool | |
209 | depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT | |
210 | default y | |
211 | ||
a6a9c0f1 DB |
212 | config RANDOM32_SELFTEST |
213 | bool "PRNG perform self test on init" | |
214 | default n | |
215 | help | |
216 | This option enables the 32 bit PRNG library functions to perform a | |
217 | self test on initialization. | |
218 | ||
1da177e4 LT |
219 | # |
220 | # compression support is select'ed if needed | |
221 | # | |
2da572c9 | 222 | config 842_COMPRESS |
5b571677 | 223 | select CRC32 |
2da572c9 DS |
224 | tristate |
225 | ||
226 | config 842_DECOMPRESS | |
5b571677 | 227 | select CRC32 |
2da572c9 DS |
228 | tristate |
229 | ||
1da177e4 LT |
230 | config ZLIB_INFLATE |
231 | tristate | |
232 | ||
233 | config ZLIB_DEFLATE | |
234 | tristate | |
1fd4e5c3 | 235 | select BITREVERSE |
1da177e4 | 236 | |
64c70b1c RP |
237 | config LZO_COMPRESS |
238 | tristate | |
239 | ||
240 | config LZO_DECOMPRESS | |
241 | tristate | |
242 | ||
c72ac7a1 CM |
243 | config LZ4_COMPRESS |
244 | tristate | |
245 | ||
246 | config LZ4HC_COMPRESS | |
247 | tristate | |
248 | ||
e76e1fdf KL |
249 | config LZ4_DECOMPRESS |
250 | tristate | |
251 | ||
24fa0402 LC |
252 | source "lib/xz/Kconfig" |
253 | ||
c8531ab3 PA |
254 | # |
255 | # These all provide a common interface (hence the apparent duplication with | |
256 | # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) | |
257 | # | |
258 | config DECOMPRESS_GZIP | |
7856a16e | 259 | select ZLIB_INFLATE |
c8531ab3 PA |
260 | tristate |
261 | ||
262 | config DECOMPRESS_BZIP2 | |
263 | tristate | |
264 | ||
265 | config DECOMPRESS_LZMA | |
266 | tristate | |
267 | ||
3ebe1243 LC |
268 | config DECOMPRESS_XZ |
269 | select XZ_DEC | |
270 | tristate | |
271 | ||
cacb246f AT |
272 | config DECOMPRESS_LZO |
273 | select LZO_DECOMPRESS | |
274 | tristate | |
275 | ||
e76e1fdf KL |
276 | config DECOMPRESS_LZ4 |
277 | select LZ4_DECOMPRESS | |
278 | tristate | |
279 | ||
f14f75b8 JS |
280 | # |
281 | # Generic allocator support is selected if needed | |
282 | # | |
283 | config GENERIC_ALLOCATOR | |
6341e62b | 284 | bool |
f14f75b8 | 285 | |
1da177e4 LT |
286 | # |
287 | # reed solomon support is select'ed if needed | |
288 | # | |
289 | config REED_SOLOMON | |
290 | tristate | |
291 | ||
292 | config REED_SOLOMON_ENC8 | |
6341e62b | 293 | bool |
1da177e4 LT |
294 | |
295 | config REED_SOLOMON_DEC8 | |
6341e62b | 296 | bool |
1da177e4 LT |
297 | |
298 | config REED_SOLOMON_ENC16 | |
6341e62b | 299 | bool |
1da177e4 LT |
300 | |
301 | config REED_SOLOMON_DEC16 | |
6341e62b | 302 | bool |
1da177e4 | 303 | |
437aa565 ID |
304 | # |
305 | # BCH support is selected if needed | |
306 | # | |
307 | config BCH | |
308 | tristate | |
309 | ||
310 | config BCH_CONST_PARAMS | |
6341e62b | 311 | bool |
437aa565 ID |
312 | help |
313 | Drivers may select this option to force specific constant | |
314 | values for parameters 'm' (Galois field order) and 't' | |
315 | (error correction capability). Those specific values must | |
316 | be set by declaring default values for symbols BCH_CONST_M | |
317 | and BCH_CONST_T. | |
318 | Doing so will enable extra compiler optimizations, | |
319 | improving encoding and decoding performance up to 2x for | |
320 | usual (m,t) values (typically such that m*t < 200). | |
321 | When this option is selected, the BCH library supports | |
322 | only a single (m,t) configuration. This is mainly useful | |
323 | for NAND flash board drivers requiring known, fixed BCH | |
324 | parameters. | |
325 | ||
326 | config BCH_CONST_M | |
327 | int | |
328 | range 5 15 | |
329 | help | |
330 | Constant value for Galois field order 'm'. If 'k' is the | |
331 | number of data bits to protect, 'm' should be chosen such | |
332 | that (k + m*t) <= 2**m - 1. | |
333 | Drivers should declare a default value for this symbol if | |
334 | they select option BCH_CONST_PARAMS. | |
335 | ||
336 | config BCH_CONST_T | |
337 | int | |
338 | help | |
339 | Constant value for error correction capability in bits 't'. | |
340 | Drivers should declare a default value for this symbol if | |
341 | they select option BCH_CONST_PARAMS. | |
342 | ||
f7704347 DM |
343 | # |
344 | # Textsearch support is select'ed if needed | |
345 | # | |
2de4ff7b | 346 | config TEXTSEARCH |
6341e62b | 347 | bool |
1da177e4 | 348 | |
df3fb93a | 349 | config TEXTSEARCH_KMP |
f7704347 | 350 | tristate |
df3fb93a | 351 | |
8082e4ed | 352 | config TEXTSEARCH_BM |
29cb9f9c | 353 | tristate |
8082e4ed | 354 | |
6408f79c | 355 | config TEXTSEARCH_FSM |
f7704347 | 356 | tristate |
6408f79c | 357 | |
5db53f3e | 358 | config BTREE |
6341e62b | 359 | bool |
5db53f3e | 360 | |
a88cc108 | 361 | config INTERVAL_TREE |
6341e62b | 362 | bool |
a88cc108 CW |
363 | help |
364 | Simple, embeddable, interval-tree. Can find the start of an | |
365 | overlapping range in log(n) time and then iterate over all | |
366 | overlapping nodes. The algorithm is implemented as an | |
367 | augmented rbtree. | |
368 | ||
369 | See: | |
370 | ||
371 | Documentation/rbtree.txt | |
372 | ||
373 | for more information. | |
374 | ||
57578c2e MW |
375 | config RADIX_TREE_MULTIORDER |
376 | bool | |
377 | ||
3cb98950 DH |
378 | config ASSOCIATIVE_ARRAY |
379 | bool | |
380 | help | |
381 | Generic associative array. Can be searched and iterated over whilst | |
382 | it is being modified. It is also reasonably quick to search and | |
383 | modify. The algorithms are non-recursive, and the trees are highly | |
384 | capacious. | |
385 | ||
386 | See: | |
387 | ||
388 | Documentation/assoc_array.txt | |
389 | ||
390 | for more information. | |
391 | ||
5ea81769 | 392 | config HAS_IOMEM |
6341e62b | 393 | bool |
5ea81769 | 394 | depends on !NO_IOMEM |
087fafd1 | 395 | select GENERIC_IO |
5ea81769 AV |
396 | default y |
397 | ||
ce816fa8 | 398 | config HAS_IOPORT_MAP |
6341e62b | 399 | bool |
ce816fa8 | 400 | depends on HAS_IOMEM && !NO_IOPORT_MAP |
ee36c2bf AV |
401 | default y |
402 | ||
411f0f3e | 403 | config HAS_DMA |
6341e62b | 404 | bool |
411f0f3e HC |
405 | depends on !NO_DMA |
406 | default y | |
407 | ||
7844572c BVA |
408 | config DMA_NOOP_OPS |
409 | bool | |
410 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
411 | default n | |
412 | ||
551199ac BVA |
413 | config DMA_VIRT_OPS |
414 | bool | |
415 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
416 | default n | |
417 | ||
928923c7 GU |
418 | config CHECK_SIGNATURE |
419 | bool | |
420 | ||
aab46da0 RR |
421 | config CPUMASK_OFFSTACK |
422 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS | |
423 | help | |
424 | Use dynamic allocation for cpumask_var_t, instead of putting | |
425 | them on the stack. This is a bit more expensive, but avoids | |
426 | stack overflow. | |
427 | ||
c39649c3 BH |
428 | config CPU_RMAP |
429 | bool | |
430 | depends on SMP | |
431 | ||
75957ba3 TH |
432 | config DQL |
433 | bool | |
434 | ||
b0125085 GS |
435 | config GLOB |
436 | bool | |
437 | # This actually supports modular compilation, but the module overhead | |
438 | # is ridiculous for the amount of code involved. Until an out-of-tree | |
439 | # driver asks for it, we'll just link it directly it into the kernel | |
440 | # when required. Since we're ignoring out-of-tree users, there's also | |
441 | # no need bother prompting for a manual decision: | |
442 | # prompt "glob_match() function" | |
443 | help | |
444 | This option provides a glob_match function for performing | |
445 | simple text pattern matching. It originated in the ATA code | |
446 | to blacklist particular drive models, but other device drivers | |
447 | may need similar functionality. | |
448 | ||
449 | All drivers in the Linux kernel tree that require this function | |
450 | should automatically select this option. Say N unless you | |
451 | are compiling an out-of tree driver which tells you that it | |
452 | depends on this. | |
453 | ||
5f9be824 | 454 | config GLOB_SELFTEST |
ba95b045 | 455 | tristate "glob self-test on init" |
5f9be824 GS |
456 | depends on GLOB |
457 | help | |
458 | This option enables a simple self-test of the glob_match | |
459 | function on startup. It is primarily useful for people | |
460 | working on the code to ensure they haven't introduced any | |
461 | regressions. | |
462 | ||
463 | It only adds a little bit of code and slows kernel boot (or | |
464 | module load) by a small amount, so you're welcome to play with | |
465 | it, but you probably don't need it. | |
466 | ||
e9cc8bdd GU |
467 | # |
468 | # Netlink attribute parsing support is select'ed if needed | |
469 | # | |
470 | config NLATTR | |
471 | bool | |
472 | ||
09d4e0ed PM |
473 | # |
474 | # Generic 64-bit atomic support is selected if needed | |
475 | # | |
476 | config GENERIC_ATOMIC64 | |
477 | bool | |
478 | ||
b411b363 PR |
479 | config LRU_CACHE |
480 | tristate | |
481 | ||
c6df4b17 DM |
482 | config CLZ_TAB |
483 | bool | |
484 | ||
10f8113e | 485 | config CORDIC |
d89ce936 | 486 | tristate "CORDIC algorithm" |
10f8113e | 487 | help |
435a95c5 MW |
488 | This option provides an implementation of the CORDIC algorithm; |
489 | calculations are in fixed point. Module will be called cordic. | |
10f8113e | 490 | |
9c1c21a0 A |
491 | config DDR |
492 | bool "JEDEC DDR data" | |
493 | help | |
494 | Data from JEDEC specs for DDR SDRAM memories, | |
495 | particularly the AC timing parameters and addressing | |
496 | information. This data is useful for drivers handling | |
497 | DDR SDRAM controllers. | |
498 | ||
511cbce2 CH |
499 | config IRQ_POLL |
500 | bool "IRQ polling library" | |
501 | help | |
502 | Helper library to poll interrupt mitigation using polling. | |
503 | ||
d9c46b18 | 504 | config MPILIB |
2e5f094b | 505 | tristate |
c6df4b17 | 506 | select CLZ_TAB |
d9c46b18 DK |
507 | help |
508 | Multiprecision maths library from GnuPG. | |
509 | It is used to implement RSA digital signature verification, | |
510 | which is used by IMA/EVM digital signature extension. | |
511 | ||
5e8898e9 | 512 | config SIGNATURE |
2e5f094b | 513 | tristate |
0d1f64f6 DK |
514 | depends on KEYS |
515 | select CRYPTO | |
be440ec7 | 516 | select CRYPTO_SHA1 |
051dbb91 DK |
517 | select MPILIB |
518 | help | |
519 | Digital signature verification. Currently only RSA is supported. | |
520 | Implementation is done using GnuPG MPI library | |
521 | ||
ab253839 DD |
522 | # |
523 | # libfdt files, only selected if needed. | |
524 | # | |
525 | config LIBFDT | |
526 | bool | |
527 | ||
a77ad6ea DH |
528 | config OID_REGISTRY |
529 | tristate | |
530 | help | |
531 | Enable fast lookup object identifier registry. | |
532 | ||
0635eb8a MG |
533 | config UCS2_STRING |
534 | tristate | |
535 | ||
ee89bd6b GU |
536 | source "lib/fonts/Kconfig" |
537 | ||
f8bcbe62 RJ |
538 | config SG_SPLIT |
539 | def_bool n | |
540 | help | |
7f7e92f7 GU |
541 | Provides a helper to split scatterlists into chunks, each chunk being |
542 | a scatterlist. This should be selected by a driver or an API which | |
543 | whishes to split a scatterlist amongst multiple DMA channels. | |
f8bcbe62 | 544 | |
9b1d6c89 ML |
545 | config SG_POOL |
546 | def_bool n | |
547 | help | |
548 | Provides a helper to allocate chained scatterlists. This should be | |
549 | selected by a driver or an API which whishes to allocate chained | |
550 | scatterlist. | |
551 | ||
308c09f1 LA |
552 | # |
553 | # sg chaining option | |
554 | # | |
555 | ||
556 | config ARCH_HAS_SG_CHAIN | |
557 | def_bool n | |
558 | ||
61031952 RZ |
559 | config ARCH_HAS_PMEM_API |
560 | bool | |
561 | ||
0aed55af DW |
562 | config ARCH_HAS_UACCESS_FLUSHCACHE |
563 | bool | |
564 | ||
67a3e8fe RZ |
565 | config ARCH_HAS_MMIO_FLUSH |
566 | bool | |
567 | ||
cd11016e AP |
568 | config STACKDEPOT |
569 | bool | |
570 | select STACKTRACE | |
571 | ||
88459642 OS |
572 | config SBITMAP |
573 | bool | |
574 | ||
44091d29 | 575 | config PARMAN |
9d25af69 | 576 | tristate "parman" if COMPILE_TEST |
44091d29 | 577 | |
cf4a7207 | 578 | config PRIME_NUMBERS |
64a57719 | 579 | tristate |
cf4a7207 | 580 | |
2de4ff7b | 581 | endmenu |