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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 | |
21 | This option provides an config for the architecture which have instruction | |
22 | can do bitreverse operation, we use the hardware instruction if the architecture | |
23 | have this capability. | |
24 | ||
8759ef32 | 25 | config RATIONAL |
6341e62b | 26 | bool |
8759ef32 | 27 | |
2922585b DM |
28 | config GENERIC_STRNCPY_FROM_USER |
29 | bool | |
30 | ||
a08c5356 LT |
31 | config GENERIC_STRNLEN_USER |
32 | bool | |
33 | ||
4cd5773a AS |
34 | config GENERIC_NET_UTILS |
35 | bool | |
36 | ||
19870def | 37 | config GENERIC_FIND_FIRST_BIT |
9ba16087 | 38 | bool |
19870def | 39 | |
b923650b MT |
40 | config NO_GENERIC_PCI_IOPORT_MAP |
41 | bool | |
42 | ||
66eab4df MT |
43 | config GENERIC_PCI_IOMAP |
44 | bool | |
45 | ||
4673ca8e MT |
46 | config GENERIC_IOMAP |
47 | bool | |
66eab4df | 48 | select GENERIC_PCI_IOMAP |
4673ca8e | 49 | |
087fafd1 | 50 | config GENERIC_IO |
6341e62b | 51 | bool |
087fafd1 RW |
52 | default n |
53 | ||
4ccf4bea WS |
54 | config STMP_DEVICE |
55 | bool | |
56 | ||
22b361d1 | 57 | config PERCPU_RWSEM |
6341e62b | 58 | bool |
22b361d1 | 59 | |
bc08b449 LT |
60 | config ARCH_USE_CMPXCHG_LOCKREF |
61 | bool | |
62 | ||
72d93104 LT |
63 | config ARCH_HAS_FAST_MULTIPLIER |
64 | bool | |
65 | ||
1da177e4 LT |
66 | config CRC_CCITT |
67 | tristate "CRC-CCITT functions" | |
68 | help | |
69 | This option is provided for the case where no in-kernel-tree | |
70 | modules require CRC-CCITT functions, but a module built outside | |
71 | the kernel tree does. Such modules that use library CRC-CCITT | |
72 | functions require M here. | |
73 | ||
7657ec1f EP |
74 | config CRC16 |
75 | tristate "CRC16 functions" | |
76 | help | |
77 | This option is provided for the case where no in-kernel-tree | |
78 | modules require CRC16 functions, but a module built outside | |
79 | the kernel tree does. Such modules that use library CRC16 | |
80 | functions require M here. | |
81 | ||
f11f594e MP |
82 | config CRC_T10DIF |
83 | tristate "CRC calculation for the T10 Data Integrity Field" | |
68411521 HX |
84 | select CRYPTO |
85 | select CRYPTO_CRCT10DIF | |
f11f594e MP |
86 | help |
87 | This option is only needed if a module that's not in the | |
88 | kernel tree needs to calculate CRC checks for use with the | |
89 | SCSI data integrity subsystem. | |
90 | ||
3e7cbae7 ID |
91 | config CRC_ITU_T |
92 | tristate "CRC ITU-T V.41 functions" | |
93 | help | |
94 | This option is provided for the case where no in-kernel-tree | |
95 | modules require CRC ITU-T V.41 functions, but a module built outside | |
96 | the kernel tree does. Such modules that use library CRC ITU-T V.41 | |
97 | functions require M here. | |
98 | ||
1da177e4 | 99 | config CRC32 |
46c5801e | 100 | tristate "CRC32/CRC32c functions" |
1da177e4 | 101 | default y |
906d66df | 102 | select BITREVERSE |
1da177e4 LT |
103 | help |
104 | This option is provided for the case where no in-kernel-tree | |
46c5801e DW |
105 | modules require CRC32/CRC32c functions, but a module built outside |
106 | the kernel tree does. Such modules that use library CRC32/CRC32c | |
107 | functions require M here. | |
1da177e4 | 108 | |
3863ef31 BP |
109 | config CRC32_SELFTEST |
110 | bool "CRC32 perform self test on init" | |
111 | default n | |
112 | depends on CRC32 | |
113 | help | |
114 | This option enables the CRC32 library functions to perform a | |
115 | self test on initialization. The self test computes crc32_le | |
116 | and crc32_be over byte strings with random alignment and length | |
117 | and computes the total elapsed time and number of bytes processed. | |
118 | ||
5cde7656 DW |
119 | choice |
120 | prompt "CRC32 implementation" | |
121 | depends on CRC32 | |
122 | default CRC32_SLICEBY8 | |
82edb4ba DW |
123 | help |
124 | This option allows a kernel builder to override the default choice | |
125 | of CRC32 algorithm. Choose the default ("slice by 8") unless you | |
126 | know that you need one of the others. | |
5cde7656 DW |
127 | |
128 | config CRC32_SLICEBY8 | |
129 | bool "Slice by 8 bytes" | |
130 | help | |
131 | Calculate checksum 8 bytes at a time with a clever slicing algorithm. | |
132 | This is the fastest algorithm, but comes with a 8KiB lookup table. | |
133 | Most modern processors have enough cache to hold this table without | |
134 | thrashing the cache. | |
135 | ||
136 | This is the default implementation choice. Choose this one unless | |
137 | you have a good reason not to. | |
138 | ||
139 | config CRC32_SLICEBY4 | |
140 | bool "Slice by 4 bytes" | |
141 | help | |
142 | Calculate checksum 4 bytes at a time with a clever slicing algorithm. | |
143 | This is a bit slower than slice by 8, but has a smaller 4KiB lookup | |
144 | table. | |
145 | ||
146 | Only choose this option if you know what you are doing. | |
147 | ||
148 | config CRC32_SARWATE | |
149 | bool "Sarwate's Algorithm (one byte at a time)" | |
150 | help | |
151 | Calculate checksum a byte at a time using Sarwate's algorithm. This | |
152 | is not particularly fast, but has a small 256 byte lookup table. | |
153 | ||
154 | Only choose this option if you know what you are doing. | |
155 | ||
156 | config CRC32_BIT | |
157 | bool "Classic Algorithm (one bit at a time)" | |
158 | help | |
159 | Calculate checksum one bit at a time. This is VERY slow, but has | |
160 | no lookup table. This is provided as a debugging option. | |
161 | ||
162 | Only choose this option if you are debugging crc32. | |
163 | ||
164 | endchoice | |
165 | ||
ad241528 JN |
166 | config CRC7 |
167 | tristate "CRC7 functions" | |
168 | help | |
169 | This option is provided for the case where no in-kernel-tree | |
170 | modules require CRC7 functions, but a module built outside | |
171 | the kernel tree does. Such modules that use library CRC7 | |
172 | functions require M here. | |
173 | ||
1da177e4 LT |
174 | config LIBCRC32C |
175 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
93027354 | 176 | select CRYPTO |
69c35efc | 177 | select CRYPTO_CRC32C |
1da177e4 LT |
178 | help |
179 | This option is provided for the case where no in-kernel-tree | |
180 | modules require CRC32c functions, but a module built outside the | |
181 | kernel tree does. Such modules that use library CRC32c functions | |
182 | require M here. See Castagnoli93. | |
183 | Module will be libcrc32c. | |
184 | ||
7150962d AS |
185 | config CRC8 |
186 | tristate "CRC8 function" | |
187 | help | |
188 | This option provides CRC8 function. Drivers may select this | |
189 | when they need to do cyclic redundancy check according CRC8 | |
190 | algorithm. Module will be called crc8. | |
191 | ||
e65e1fc2 AV |
192 | config AUDIT_GENERIC |
193 | bool | |
194 | depends on AUDIT && !AUDIT_ARCH | |
195 | default y | |
196 | ||
4b588411 AT |
197 | config AUDIT_ARCH_COMPAT_GENERIC |
198 | bool | |
199 | default n | |
200 | ||
201 | config AUDIT_COMPAT_GENERIC | |
202 | bool | |
203 | depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT | |
204 | default y | |
205 | ||
a6a9c0f1 DB |
206 | config RANDOM32_SELFTEST |
207 | bool "PRNG perform self test on init" | |
208 | default n | |
209 | help | |
210 | This option enables the 32 bit PRNG library functions to perform a | |
211 | self test on initialization. | |
212 | ||
1da177e4 LT |
213 | # |
214 | # compression support is select'ed if needed | |
215 | # | |
216 | config ZLIB_INFLATE | |
217 | tristate | |
218 | ||
219 | config ZLIB_DEFLATE | |
220 | tristate | |
221 | ||
64c70b1c RP |
222 | config LZO_COMPRESS |
223 | tristate | |
224 | ||
225 | config LZO_DECOMPRESS | |
226 | tristate | |
227 | ||
c72ac7a1 CM |
228 | config LZ4_COMPRESS |
229 | tristate | |
230 | ||
231 | config LZ4HC_COMPRESS | |
232 | tristate | |
233 | ||
e76e1fdf KL |
234 | config LZ4_DECOMPRESS |
235 | tristate | |
236 | ||
24fa0402 LC |
237 | source "lib/xz/Kconfig" |
238 | ||
c8531ab3 PA |
239 | # |
240 | # These all provide a common interface (hence the apparent duplication with | |
241 | # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) | |
242 | # | |
243 | config DECOMPRESS_GZIP | |
7856a16e | 244 | select ZLIB_INFLATE |
c8531ab3 PA |
245 | tristate |
246 | ||
247 | config DECOMPRESS_BZIP2 | |
248 | tristate | |
249 | ||
250 | config DECOMPRESS_LZMA | |
251 | tristate | |
252 | ||
3ebe1243 LC |
253 | config DECOMPRESS_XZ |
254 | select XZ_DEC | |
255 | tristate | |
256 | ||
cacb246f AT |
257 | config DECOMPRESS_LZO |
258 | select LZO_DECOMPRESS | |
259 | tristate | |
260 | ||
e76e1fdf KL |
261 | config DECOMPRESS_LZ4 |
262 | select LZ4_DECOMPRESS | |
263 | tristate | |
264 | ||
f14f75b8 JS |
265 | # |
266 | # Generic allocator support is selected if needed | |
267 | # | |
268 | config GENERIC_ALLOCATOR | |
6341e62b | 269 | bool |
f14f75b8 | 270 | |
1da177e4 LT |
271 | # |
272 | # reed solomon support is select'ed if needed | |
273 | # | |
274 | config REED_SOLOMON | |
275 | tristate | |
276 | ||
277 | config REED_SOLOMON_ENC8 | |
6341e62b | 278 | bool |
1da177e4 LT |
279 | |
280 | config REED_SOLOMON_DEC8 | |
6341e62b | 281 | bool |
1da177e4 LT |
282 | |
283 | config REED_SOLOMON_ENC16 | |
6341e62b | 284 | bool |
1da177e4 LT |
285 | |
286 | config REED_SOLOMON_DEC16 | |
6341e62b | 287 | bool |
1da177e4 | 288 | |
437aa565 ID |
289 | # |
290 | # BCH support is selected if needed | |
291 | # | |
292 | config BCH | |
293 | tristate | |
294 | ||
295 | config BCH_CONST_PARAMS | |
6341e62b | 296 | bool |
437aa565 ID |
297 | help |
298 | Drivers may select this option to force specific constant | |
299 | values for parameters 'm' (Galois field order) and 't' | |
300 | (error correction capability). Those specific values must | |
301 | be set by declaring default values for symbols BCH_CONST_M | |
302 | and BCH_CONST_T. | |
303 | Doing so will enable extra compiler optimizations, | |
304 | improving encoding and decoding performance up to 2x for | |
305 | usual (m,t) values (typically such that m*t < 200). | |
306 | When this option is selected, the BCH library supports | |
307 | only a single (m,t) configuration. This is mainly useful | |
308 | for NAND flash board drivers requiring known, fixed BCH | |
309 | parameters. | |
310 | ||
311 | config BCH_CONST_M | |
312 | int | |
313 | range 5 15 | |
314 | help | |
315 | Constant value for Galois field order 'm'. If 'k' is the | |
316 | number of data bits to protect, 'm' should be chosen such | |
317 | that (k + m*t) <= 2**m - 1. | |
318 | Drivers should declare a default value for this symbol if | |
319 | they select option BCH_CONST_PARAMS. | |
320 | ||
321 | config BCH_CONST_T | |
322 | int | |
323 | help | |
324 | Constant value for error correction capability in bits 't'. | |
325 | Drivers should declare a default value for this symbol if | |
326 | they select option BCH_CONST_PARAMS. | |
327 | ||
f7704347 DM |
328 | # |
329 | # Textsearch support is select'ed if needed | |
330 | # | |
2de4ff7b | 331 | config TEXTSEARCH |
6341e62b | 332 | bool |
1da177e4 | 333 | |
df3fb93a | 334 | config TEXTSEARCH_KMP |
f7704347 | 335 | tristate |
df3fb93a | 336 | |
8082e4ed | 337 | config TEXTSEARCH_BM |
29cb9f9c | 338 | tristate |
8082e4ed | 339 | |
6408f79c | 340 | config TEXTSEARCH_FSM |
f7704347 | 341 | tristate |
6408f79c | 342 | |
5db53f3e | 343 | config BTREE |
6341e62b | 344 | bool |
5db53f3e | 345 | |
a88cc108 | 346 | config INTERVAL_TREE |
6341e62b | 347 | bool |
a88cc108 CW |
348 | help |
349 | Simple, embeddable, interval-tree. Can find the start of an | |
350 | overlapping range in log(n) time and then iterate over all | |
351 | overlapping nodes. The algorithm is implemented as an | |
352 | augmented rbtree. | |
353 | ||
354 | See: | |
355 | ||
356 | Documentation/rbtree.txt | |
357 | ||
358 | for more information. | |
359 | ||
3cb98950 DH |
360 | config ASSOCIATIVE_ARRAY |
361 | bool | |
362 | help | |
363 | Generic associative array. Can be searched and iterated over whilst | |
364 | it is being modified. It is also reasonably quick to search and | |
365 | modify. The algorithms are non-recursive, and the trees are highly | |
366 | capacious. | |
367 | ||
368 | See: | |
369 | ||
370 | Documentation/assoc_array.txt | |
371 | ||
372 | for more information. | |
373 | ||
5ea81769 | 374 | config HAS_IOMEM |
6341e62b | 375 | bool |
5ea81769 | 376 | depends on !NO_IOMEM |
087fafd1 | 377 | select GENERIC_IO |
5ea81769 AV |
378 | default y |
379 | ||
ce816fa8 | 380 | config HAS_IOPORT_MAP |
6341e62b | 381 | bool |
ce816fa8 | 382 | depends on HAS_IOMEM && !NO_IOPORT_MAP |
ee36c2bf AV |
383 | default y |
384 | ||
411f0f3e | 385 | config HAS_DMA |
6341e62b | 386 | bool |
411f0f3e HC |
387 | depends on !NO_DMA |
388 | default y | |
389 | ||
928923c7 GU |
390 | config CHECK_SIGNATURE |
391 | bool | |
392 | ||
aab46da0 RR |
393 | config CPUMASK_OFFSTACK |
394 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS | |
395 | help | |
396 | Use dynamic allocation for cpumask_var_t, instead of putting | |
397 | them on the stack. This is a bit more expensive, but avoids | |
398 | stack overflow. | |
399 | ||
8c384cde RR |
400 | config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS |
401 | bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS | |
525c1f92 | 402 | depends on BROKEN |
8c384cde | 403 | |
c39649c3 BH |
404 | config CPU_RMAP |
405 | bool | |
406 | depends on SMP | |
407 | ||
75957ba3 TH |
408 | config DQL |
409 | bool | |
410 | ||
b0125085 GS |
411 | config GLOB |
412 | bool | |
413 | # This actually supports modular compilation, but the module overhead | |
414 | # is ridiculous for the amount of code involved. Until an out-of-tree | |
415 | # driver asks for it, we'll just link it directly it into the kernel | |
416 | # when required. Since we're ignoring out-of-tree users, there's also | |
417 | # no need bother prompting for a manual decision: | |
418 | # prompt "glob_match() function" | |
419 | help | |
420 | This option provides a glob_match function for performing | |
421 | simple text pattern matching. It originated in the ATA code | |
422 | to blacklist particular drive models, but other device drivers | |
423 | may need similar functionality. | |
424 | ||
425 | All drivers in the Linux kernel tree that require this function | |
426 | should automatically select this option. Say N unless you | |
427 | are compiling an out-of tree driver which tells you that it | |
428 | depends on this. | |
429 | ||
5f9be824 GS |
430 | config GLOB_SELFTEST |
431 | bool "glob self-test on init" | |
432 | default n | |
433 | depends on GLOB | |
434 | help | |
435 | This option enables a simple self-test of the glob_match | |
436 | function on startup. It is primarily useful for people | |
437 | working on the code to ensure they haven't introduced any | |
438 | regressions. | |
439 | ||
440 | It only adds a little bit of code and slows kernel boot (or | |
441 | module load) by a small amount, so you're welcome to play with | |
442 | it, but you probably don't need it. | |
443 | ||
e9cc8bdd GU |
444 | # |
445 | # Netlink attribute parsing support is select'ed if needed | |
446 | # | |
447 | config NLATTR | |
448 | bool | |
449 | ||
09d4e0ed PM |
450 | # |
451 | # Generic 64-bit atomic support is selected if needed | |
452 | # | |
453 | config GENERIC_ATOMIC64 | |
454 | bool | |
455 | ||
7463449b CM |
456 | config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
457 | def_bool y if GENERIC_ATOMIC64 | |
458 | ||
b411b363 PR |
459 | config LRU_CACHE |
460 | tristate | |
461 | ||
c5485a7e | 462 | config AVERAGE |
a7a9a24d MB |
463 | bool "Averaging functions" |
464 | help | |
465 | This option is provided for the case where no in-kernel-tree | |
466 | modules require averaging functions, but a module built outside | |
467 | the kernel tree does. Such modules that use library averaging | |
468 | functions require Y here. | |
469 | ||
470 | If unsure, say N. | |
c5485a7e | 471 | |
c6df4b17 DM |
472 | config CLZ_TAB |
473 | bool | |
474 | ||
10f8113e | 475 | config CORDIC |
d89ce936 | 476 | tristate "CORDIC algorithm" |
10f8113e | 477 | help |
435a95c5 MW |
478 | This option provides an implementation of the CORDIC algorithm; |
479 | calculations are in fixed point. Module will be called cordic. | |
10f8113e | 480 | |
9c1c21a0 A |
481 | config DDR |
482 | bool "JEDEC DDR data" | |
483 | help | |
484 | Data from JEDEC specs for DDR SDRAM memories, | |
485 | particularly the AC timing parameters and addressing | |
486 | information. This data is useful for drivers handling | |
487 | DDR SDRAM controllers. | |
488 | ||
d9c46b18 | 489 | config MPILIB |
2e5f094b | 490 | tristate |
c6df4b17 | 491 | select CLZ_TAB |
d9c46b18 DK |
492 | help |
493 | Multiprecision maths library from GnuPG. | |
494 | It is used to implement RSA digital signature verification, | |
495 | which is used by IMA/EVM digital signature extension. | |
496 | ||
5e8898e9 | 497 | config SIGNATURE |
2e5f094b | 498 | tristate |
0d1f64f6 DK |
499 | depends on KEYS |
500 | select CRYPTO | |
be440ec7 | 501 | select CRYPTO_SHA1 |
051dbb91 DK |
502 | select MPILIB |
503 | help | |
504 | Digital signature verification. Currently only RSA is supported. | |
505 | Implementation is done using GnuPG MPI library | |
506 | ||
ab253839 DD |
507 | # |
508 | # libfdt files, only selected if needed. | |
509 | # | |
510 | config LIBFDT | |
511 | bool | |
512 | ||
a77ad6ea DH |
513 | config OID_REGISTRY |
514 | tristate | |
515 | help | |
516 | Enable fast lookup object identifier registry. | |
517 | ||
0635eb8a MG |
518 | config UCS2_STRING |
519 | tristate | |
520 | ||
ee89bd6b GU |
521 | source "lib/fonts/Kconfig" |
522 | ||
308c09f1 LA |
523 | # |
524 | # sg chaining option | |
525 | # | |
526 | ||
527 | config ARCH_HAS_SG_CHAIN | |
528 | def_bool n | |
529 | ||
2de4ff7b | 530 | endmenu |