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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 | ||
90a4bbef | 62 | config LIBIO |
63 | bool "Generic logical IO management" | |
369b6172 | 64 | def_bool y if PCI && (ARM || UNICORE32 || MICROBLAZE || ARM64) |
90a4bbef | 65 | help |
66 | For some architectures, there are no IO space. To support the | |
67 | accesses to legacy I/O devices on those architectures, kernel | |
68 | implemented the memory mapped I/O mechanism based on bridge bus | |
69 | supports. But for some buses which do not support MMIO, the | |
70 | peripherals there should be accessed with device-specific way. | |
71 | To abstract those different I/O accesses into unified I/O accessors, | |
72 | this option provide a generic I/O space management way after mapping | |
73 | the device I/O to system logical/fake I/O and help to hide all the | |
74 | hardware detail. | |
75 | ||
1da177e4 LT |
76 | config CRC_CCITT |
77 | tristate "CRC-CCITT functions" | |
78 | help | |
79 | This option is provided for the case where no in-kernel-tree | |
80 | modules require CRC-CCITT functions, but a module built outside | |
81 | the kernel tree does. Such modules that use library CRC-CCITT | |
82 | functions require M here. | |
83 | ||
7657ec1f EP |
84 | config CRC16 |
85 | tristate "CRC16 functions" | |
86 | help | |
87 | This option is provided for the case where no in-kernel-tree | |
88 | modules require CRC16 functions, but a module built outside | |
89 | the kernel tree does. Such modules that use library CRC16 | |
90 | functions require M here. | |
91 | ||
f11f594e MP |
92 | config CRC_T10DIF |
93 | tristate "CRC calculation for the T10 Data Integrity Field" | |
68411521 HX |
94 | select CRYPTO |
95 | select CRYPTO_CRCT10DIF | |
f11f594e MP |
96 | help |
97 | This option is only needed if a module that's not in the | |
98 | kernel tree needs to calculate CRC checks for use with the | |
99 | SCSI data integrity subsystem. | |
100 | ||
3e7cbae7 ID |
101 | config CRC_ITU_T |
102 | tristate "CRC ITU-T V.41 functions" | |
103 | help | |
104 | This option is provided for the case where no in-kernel-tree | |
105 | modules require CRC ITU-T V.41 functions, but a module built outside | |
106 | the kernel tree does. Such modules that use library CRC ITU-T V.41 | |
107 | functions require M here. | |
108 | ||
1da177e4 | 109 | config CRC32 |
46c5801e | 110 | tristate "CRC32/CRC32c functions" |
1da177e4 | 111 | default y |
906d66df | 112 | select BITREVERSE |
1da177e4 LT |
113 | help |
114 | This option is provided for the case where no in-kernel-tree | |
46c5801e DW |
115 | modules require CRC32/CRC32c functions, but a module built outside |
116 | the kernel tree does. Such modules that use library CRC32/CRC32c | |
117 | functions require M here. | |
1da177e4 | 118 | |
3863ef31 | 119 | config CRC32_SELFTEST |
5fb7f874 | 120 | tristate "CRC32 perform self test on init" |
3863ef31 BP |
121 | depends on CRC32 |
122 | help | |
123 | This option enables the CRC32 library functions to perform a | |
124 | self test on initialization. The self test computes crc32_le | |
125 | and crc32_be over byte strings with random alignment and length | |
126 | and computes the total elapsed time and number of bytes processed. | |
127 | ||
5cde7656 DW |
128 | choice |
129 | prompt "CRC32 implementation" | |
130 | depends on CRC32 | |
131 | default CRC32_SLICEBY8 | |
82edb4ba DW |
132 | help |
133 | This option allows a kernel builder to override the default choice | |
134 | of CRC32 algorithm. Choose the default ("slice by 8") unless you | |
135 | know that you need one of the others. | |
5cde7656 DW |
136 | |
137 | config CRC32_SLICEBY8 | |
138 | bool "Slice by 8 bytes" | |
139 | help | |
140 | Calculate checksum 8 bytes at a time with a clever slicing algorithm. | |
141 | This is the fastest algorithm, but comes with a 8KiB lookup table. | |
142 | Most modern processors have enough cache to hold this table without | |
143 | thrashing the cache. | |
144 | ||
145 | This is the default implementation choice. Choose this one unless | |
146 | you have a good reason not to. | |
147 | ||
148 | config CRC32_SLICEBY4 | |
149 | bool "Slice by 4 bytes" | |
150 | help | |
151 | Calculate checksum 4 bytes at a time with a clever slicing algorithm. | |
152 | This is a bit slower than slice by 8, but has a smaller 4KiB lookup | |
153 | table. | |
154 | ||
155 | Only choose this option if you know what you are doing. | |
156 | ||
157 | config CRC32_SARWATE | |
158 | bool "Sarwate's Algorithm (one byte at a time)" | |
159 | help | |
160 | Calculate checksum a byte at a time using Sarwate's algorithm. This | |
161 | is not particularly fast, but has a small 256 byte lookup table. | |
162 | ||
163 | Only choose this option if you know what you are doing. | |
164 | ||
165 | config CRC32_BIT | |
166 | bool "Classic Algorithm (one bit at a time)" | |
167 | help | |
168 | Calculate checksum one bit at a time. This is VERY slow, but has | |
169 | no lookup table. This is provided as a debugging option. | |
170 | ||
171 | Only choose this option if you are debugging crc32. | |
172 | ||
173 | endchoice | |
174 | ||
0cbaa448 JK |
175 | config CRC4 |
176 | tristate "CRC4 functions" | |
177 | help | |
178 | This option is provided for the case where no in-kernel-tree | |
179 | modules require CRC4 functions, but a module built outside | |
180 | the kernel tree does. Such modules that use library CRC4 | |
181 | functions require M here. | |
182 | ||
ad241528 JN |
183 | config CRC7 |
184 | tristate "CRC7 functions" | |
185 | help | |
186 | This option is provided for the case where no in-kernel-tree | |
187 | modules require CRC7 functions, but a module built outside | |
188 | the kernel tree does. Such modules that use library CRC7 | |
189 | functions require M here. | |
190 | ||
1da177e4 LT |
191 | config LIBCRC32C |
192 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
93027354 | 193 | select CRYPTO |
69c35efc | 194 | select CRYPTO_CRC32C |
1da177e4 LT |
195 | help |
196 | This option is provided for the case where no in-kernel-tree | |
197 | modules require CRC32c functions, but a module built outside the | |
198 | kernel tree does. Such modules that use library CRC32c functions | |
199 | require M here. See Castagnoli93. | |
200 | Module will be libcrc32c. | |
201 | ||
7150962d AS |
202 | config CRC8 |
203 | tristate "CRC8 function" | |
204 | help | |
205 | This option provides CRC8 function. Drivers may select this | |
206 | when they need to do cyclic redundancy check according CRC8 | |
207 | algorithm. Module will be called crc8. | |
208 | ||
e65e1fc2 AV |
209 | config AUDIT_GENERIC |
210 | bool | |
211 | depends on AUDIT && !AUDIT_ARCH | |
212 | default y | |
213 | ||
4b588411 AT |
214 | config AUDIT_ARCH_COMPAT_GENERIC |
215 | bool | |
216 | default n | |
217 | ||
218 | config AUDIT_COMPAT_GENERIC | |
219 | bool | |
220 | depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT | |
221 | default y | |
222 | ||
a6a9c0f1 DB |
223 | config RANDOM32_SELFTEST |
224 | bool "PRNG perform self test on init" | |
225 | default n | |
226 | help | |
227 | This option enables the 32 bit PRNG library functions to perform a | |
228 | self test on initialization. | |
229 | ||
1da177e4 LT |
230 | # |
231 | # compression support is select'ed if needed | |
232 | # | |
2da572c9 | 233 | config 842_COMPRESS |
5b571677 | 234 | select CRC32 |
2da572c9 DS |
235 | tristate |
236 | ||
237 | config 842_DECOMPRESS | |
5b571677 | 238 | select CRC32 |
2da572c9 DS |
239 | tristate |
240 | ||
1da177e4 LT |
241 | config ZLIB_INFLATE |
242 | tristate | |
243 | ||
244 | config ZLIB_DEFLATE | |
245 | tristate | |
1fd4e5c3 | 246 | select BITREVERSE |
1da177e4 | 247 | |
64c70b1c RP |
248 | config LZO_COMPRESS |
249 | tristate | |
250 | ||
251 | config LZO_DECOMPRESS | |
252 | tristate | |
253 | ||
c72ac7a1 CM |
254 | config LZ4_COMPRESS |
255 | tristate | |
256 | ||
257 | config LZ4HC_COMPRESS | |
258 | tristate | |
259 | ||
e76e1fdf KL |
260 | config LZ4_DECOMPRESS |
261 | tristate | |
262 | ||
24fa0402 LC |
263 | source "lib/xz/Kconfig" |
264 | ||
c8531ab3 PA |
265 | # |
266 | # These all provide a common interface (hence the apparent duplication with | |
267 | # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) | |
268 | # | |
269 | config DECOMPRESS_GZIP | |
7856a16e | 270 | select ZLIB_INFLATE |
c8531ab3 PA |
271 | tristate |
272 | ||
273 | config DECOMPRESS_BZIP2 | |
274 | tristate | |
275 | ||
276 | config DECOMPRESS_LZMA | |
277 | tristate | |
278 | ||
3ebe1243 LC |
279 | config DECOMPRESS_XZ |
280 | select XZ_DEC | |
281 | tristate | |
282 | ||
cacb246f AT |
283 | config DECOMPRESS_LZO |
284 | select LZO_DECOMPRESS | |
285 | tristate | |
286 | ||
e76e1fdf KL |
287 | config DECOMPRESS_LZ4 |
288 | select LZ4_DECOMPRESS | |
289 | tristate | |
290 | ||
f14f75b8 JS |
291 | # |
292 | # Generic allocator support is selected if needed | |
293 | # | |
294 | config GENERIC_ALLOCATOR | |
6341e62b | 295 | bool |
f14f75b8 | 296 | |
1da177e4 LT |
297 | # |
298 | # reed solomon support is select'ed if needed | |
299 | # | |
300 | config REED_SOLOMON | |
301 | tristate | |
302 | ||
303 | config REED_SOLOMON_ENC8 | |
6341e62b | 304 | bool |
1da177e4 LT |
305 | |
306 | config REED_SOLOMON_DEC8 | |
6341e62b | 307 | bool |
1da177e4 LT |
308 | |
309 | config REED_SOLOMON_ENC16 | |
6341e62b | 310 | bool |
1da177e4 LT |
311 | |
312 | config REED_SOLOMON_DEC16 | |
6341e62b | 313 | bool |
1da177e4 | 314 | |
437aa565 ID |
315 | # |
316 | # BCH support is selected if needed | |
317 | # | |
318 | config BCH | |
319 | tristate | |
320 | ||
321 | config BCH_CONST_PARAMS | |
6341e62b | 322 | bool |
437aa565 ID |
323 | help |
324 | Drivers may select this option to force specific constant | |
325 | values for parameters 'm' (Galois field order) and 't' | |
326 | (error correction capability). Those specific values must | |
327 | be set by declaring default values for symbols BCH_CONST_M | |
328 | and BCH_CONST_T. | |
329 | Doing so will enable extra compiler optimizations, | |
330 | improving encoding and decoding performance up to 2x for | |
331 | usual (m,t) values (typically such that m*t < 200). | |
332 | When this option is selected, the BCH library supports | |
333 | only a single (m,t) configuration. This is mainly useful | |
334 | for NAND flash board drivers requiring known, fixed BCH | |
335 | parameters. | |
336 | ||
337 | config BCH_CONST_M | |
338 | int | |
339 | range 5 15 | |
340 | help | |
341 | Constant value for Galois field order 'm'. If 'k' is the | |
342 | number of data bits to protect, 'm' should be chosen such | |
343 | that (k + m*t) <= 2**m - 1. | |
344 | Drivers should declare a default value for this symbol if | |
345 | they select option BCH_CONST_PARAMS. | |
346 | ||
347 | config BCH_CONST_T | |
348 | int | |
349 | help | |
350 | Constant value for error correction capability in bits 't'. | |
351 | Drivers should declare a default value for this symbol if | |
352 | they select option BCH_CONST_PARAMS. | |
353 | ||
f7704347 DM |
354 | # |
355 | # Textsearch support is select'ed if needed | |
356 | # | |
2de4ff7b | 357 | config TEXTSEARCH |
6341e62b | 358 | bool |
1da177e4 | 359 | |
df3fb93a | 360 | config TEXTSEARCH_KMP |
f7704347 | 361 | tristate |
df3fb93a | 362 | |
8082e4ed | 363 | config TEXTSEARCH_BM |
29cb9f9c | 364 | tristate |
8082e4ed | 365 | |
6408f79c | 366 | config TEXTSEARCH_FSM |
f7704347 | 367 | tristate |
6408f79c | 368 | |
5db53f3e | 369 | config BTREE |
6341e62b | 370 | bool |
5db53f3e | 371 | |
a88cc108 | 372 | config INTERVAL_TREE |
6341e62b | 373 | bool |
a88cc108 CW |
374 | help |
375 | Simple, embeddable, interval-tree. Can find the start of an | |
376 | overlapping range in log(n) time and then iterate over all | |
377 | overlapping nodes. The algorithm is implemented as an | |
378 | augmented rbtree. | |
379 | ||
380 | See: | |
381 | ||
382 | Documentation/rbtree.txt | |
383 | ||
384 | for more information. | |
385 | ||
57578c2e MW |
386 | config RADIX_TREE_MULTIORDER |
387 | bool | |
388 | ||
3cb98950 DH |
389 | config ASSOCIATIVE_ARRAY |
390 | bool | |
391 | help | |
392 | Generic associative array. Can be searched and iterated over whilst | |
393 | it is being modified. It is also reasonably quick to search and | |
394 | modify. The algorithms are non-recursive, and the trees are highly | |
395 | capacious. | |
396 | ||
397 | See: | |
398 | ||
399 | Documentation/assoc_array.txt | |
400 | ||
401 | for more information. | |
402 | ||
5ea81769 | 403 | config HAS_IOMEM |
6341e62b | 404 | bool |
5ea81769 | 405 | depends on !NO_IOMEM |
087fafd1 | 406 | select GENERIC_IO |
5ea81769 AV |
407 | default y |
408 | ||
ce816fa8 | 409 | config HAS_IOPORT_MAP |
6341e62b | 410 | bool |
ce816fa8 | 411 | depends on HAS_IOMEM && !NO_IOPORT_MAP |
ee36c2bf AV |
412 | default y |
413 | ||
411f0f3e | 414 | config HAS_DMA |
6341e62b | 415 | bool |
411f0f3e HC |
416 | depends on !NO_DMA |
417 | default y | |
418 | ||
7844572c BVA |
419 | config DMA_NOOP_OPS |
420 | bool | |
421 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
422 | default n | |
423 | ||
551199ac BVA |
424 | config DMA_VIRT_OPS |
425 | bool | |
426 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
427 | default n | |
428 | ||
928923c7 GU |
429 | config CHECK_SIGNATURE |
430 | bool | |
431 | ||
aab46da0 RR |
432 | config CPUMASK_OFFSTACK |
433 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS | |
434 | help | |
435 | Use dynamic allocation for cpumask_var_t, instead of putting | |
436 | them on the stack. This is a bit more expensive, but avoids | |
437 | stack overflow. | |
438 | ||
c39649c3 BH |
439 | config CPU_RMAP |
440 | bool | |
441 | depends on SMP | |
442 | ||
75957ba3 TH |
443 | config DQL |
444 | bool | |
445 | ||
b0125085 GS |
446 | config GLOB |
447 | bool | |
448 | # This actually supports modular compilation, but the module overhead | |
449 | # is ridiculous for the amount of code involved. Until an out-of-tree | |
450 | # driver asks for it, we'll just link it directly it into the kernel | |
451 | # when required. Since we're ignoring out-of-tree users, there's also | |
452 | # no need bother prompting for a manual decision: | |
453 | # prompt "glob_match() function" | |
454 | help | |
455 | This option provides a glob_match function for performing | |
456 | simple text pattern matching. It originated in the ATA code | |
457 | to blacklist particular drive models, but other device drivers | |
458 | may need similar functionality. | |
459 | ||
460 | All drivers in the Linux kernel tree that require this function | |
461 | should automatically select this option. Say N unless you | |
462 | are compiling an out-of tree driver which tells you that it | |
463 | depends on this. | |
464 | ||
5f9be824 | 465 | config GLOB_SELFTEST |
ba95b045 | 466 | tristate "glob self-test on init" |
5f9be824 GS |
467 | depends on GLOB |
468 | help | |
469 | This option enables a simple self-test of the glob_match | |
470 | function on startup. It is primarily useful for people | |
471 | working on the code to ensure they haven't introduced any | |
472 | regressions. | |
473 | ||
474 | It only adds a little bit of code and slows kernel boot (or | |
475 | module load) by a small amount, so you're welcome to play with | |
476 | it, but you probably don't need it. | |
477 | ||
e9cc8bdd GU |
478 | # |
479 | # Netlink attribute parsing support is select'ed if needed | |
480 | # | |
481 | config NLATTR | |
482 | bool | |
483 | ||
09d4e0ed PM |
484 | # |
485 | # Generic 64-bit atomic support is selected if needed | |
486 | # | |
487 | config GENERIC_ATOMIC64 | |
488 | bool | |
489 | ||
b411b363 PR |
490 | config LRU_CACHE |
491 | tristate | |
492 | ||
c6df4b17 DM |
493 | config CLZ_TAB |
494 | bool | |
495 | ||
10f8113e | 496 | config CORDIC |
d89ce936 | 497 | tristate "CORDIC algorithm" |
10f8113e | 498 | help |
435a95c5 MW |
499 | This option provides an implementation of the CORDIC algorithm; |
500 | calculations are in fixed point. Module will be called cordic. | |
10f8113e | 501 | |
9c1c21a0 A |
502 | config DDR |
503 | bool "JEDEC DDR data" | |
504 | help | |
505 | Data from JEDEC specs for DDR SDRAM memories, | |
506 | particularly the AC timing parameters and addressing | |
507 | information. This data is useful for drivers handling | |
508 | DDR SDRAM controllers. | |
509 | ||
511cbce2 CH |
510 | config IRQ_POLL |
511 | bool "IRQ polling library" | |
512 | help | |
513 | Helper library to poll interrupt mitigation using polling. | |
514 | ||
d9c46b18 | 515 | config MPILIB |
2e5f094b | 516 | tristate |
c6df4b17 | 517 | select CLZ_TAB |
d9c46b18 DK |
518 | help |
519 | Multiprecision maths library from GnuPG. | |
520 | It is used to implement RSA digital signature verification, | |
521 | which is used by IMA/EVM digital signature extension. | |
522 | ||
5e8898e9 | 523 | config SIGNATURE |
2e5f094b | 524 | tristate |
0d1f64f6 DK |
525 | depends on KEYS |
526 | select CRYPTO | |
be440ec7 | 527 | select CRYPTO_SHA1 |
051dbb91 DK |
528 | select MPILIB |
529 | help | |
530 | Digital signature verification. Currently only RSA is supported. | |
531 | Implementation is done using GnuPG MPI library | |
532 | ||
ab253839 DD |
533 | # |
534 | # libfdt files, only selected if needed. | |
535 | # | |
536 | config LIBFDT | |
537 | bool | |
538 | ||
a77ad6ea DH |
539 | config OID_REGISTRY |
540 | tristate | |
541 | help | |
542 | Enable fast lookup object identifier registry. | |
543 | ||
0635eb8a MG |
544 | config UCS2_STRING |
545 | tristate | |
546 | ||
ee89bd6b GU |
547 | source "lib/fonts/Kconfig" |
548 | ||
f8bcbe62 RJ |
549 | config SG_SPLIT |
550 | def_bool n | |
551 | help | |
7f7e92f7 GU |
552 | Provides a helper to split scatterlists into chunks, each chunk being |
553 | a scatterlist. This should be selected by a driver or an API which | |
554 | whishes to split a scatterlist amongst multiple DMA channels. | |
f8bcbe62 | 555 | |
9b1d6c89 ML |
556 | config SG_POOL |
557 | def_bool n | |
558 | help | |
559 | Provides a helper to allocate chained scatterlists. This should be | |
560 | selected by a driver or an API which whishes to allocate chained | |
561 | scatterlist. | |
562 | ||
308c09f1 LA |
563 | # |
564 | # sg chaining option | |
565 | # | |
566 | ||
567 | config ARCH_HAS_SG_CHAIN | |
568 | def_bool n | |
569 | ||
61031952 RZ |
570 | config ARCH_HAS_PMEM_API |
571 | bool | |
572 | ||
0aed55af DW |
573 | config ARCH_HAS_UACCESS_FLUSHCACHE |
574 | bool | |
575 | ||
67a3e8fe RZ |
576 | config ARCH_HAS_MMIO_FLUSH |
577 | bool | |
578 | ||
cd11016e AP |
579 | config STACKDEPOT |
580 | bool | |
581 | select STACKTRACE | |
582 | ||
88459642 OS |
583 | config SBITMAP |
584 | bool | |
585 | ||
44091d29 | 586 | config PARMAN |
9d25af69 | 587 | tristate "parman" if COMPILE_TEST |
44091d29 | 588 | |
cf4a7207 | 589 | config PRIME_NUMBERS |
64a57719 | 590 | tristate |
cf4a7207 | 591 | |
2de4ff7b | 592 | endmenu |