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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 | ||
af3ea169 | 62 | config LIBIO |
63 | bool "Generic logical IO management" | |
c0cf63ef | 64 | def_bool y if PCI && (ARM || UNICORE32 || MICROBLAZE || ARM64) |
af3ea169 | 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 BP |
119 | config CRC32_SELFTEST |
120 | bool "CRC32 perform self test on init" | |
121 | default n | |
122 | depends on CRC32 | |
123 | help | |
124 | This option enables the CRC32 library functions to perform a | |
125 | self test on initialization. The self test computes crc32_le | |
126 | and crc32_be over byte strings with random alignment and length | |
127 | and computes the total elapsed time and number of bytes processed. | |
128 | ||
5cde7656 DW |
129 | choice |
130 | prompt "CRC32 implementation" | |
131 | depends on CRC32 | |
132 | default CRC32_SLICEBY8 | |
82edb4ba DW |
133 | help |
134 | This option allows a kernel builder to override the default choice | |
135 | of CRC32 algorithm. Choose the default ("slice by 8") unless you | |
136 | know that you need one of the others. | |
5cde7656 DW |
137 | |
138 | config CRC32_SLICEBY8 | |
139 | bool "Slice by 8 bytes" | |
140 | help | |
141 | Calculate checksum 8 bytes at a time with a clever slicing algorithm. | |
142 | This is the fastest algorithm, but comes with a 8KiB lookup table. | |
143 | Most modern processors have enough cache to hold this table without | |
144 | thrashing the cache. | |
145 | ||
146 | This is the default implementation choice. Choose this one unless | |
147 | you have a good reason not to. | |
148 | ||
149 | config CRC32_SLICEBY4 | |
150 | bool "Slice by 4 bytes" | |
151 | help | |
152 | Calculate checksum 4 bytes at a time with a clever slicing algorithm. | |
153 | This is a bit slower than slice by 8, but has a smaller 4KiB lookup | |
154 | table. | |
155 | ||
156 | Only choose this option if you know what you are doing. | |
157 | ||
158 | config CRC32_SARWATE | |
159 | bool "Sarwate's Algorithm (one byte at a time)" | |
160 | help | |
161 | Calculate checksum a byte at a time using Sarwate's algorithm. This | |
162 | is not particularly fast, but has a small 256 byte lookup table. | |
163 | ||
164 | Only choose this option if you know what you are doing. | |
165 | ||
166 | config CRC32_BIT | |
167 | bool "Classic Algorithm (one bit at a time)" | |
168 | help | |
169 | Calculate checksum one bit at a time. This is VERY slow, but has | |
170 | no lookup table. This is provided as a debugging option. | |
171 | ||
172 | Only choose this option if you are debugging crc32. | |
173 | ||
174 | endchoice | |
175 | ||
ad241528 JN |
176 | config CRC7 |
177 | tristate "CRC7 functions" | |
178 | help | |
179 | This option is provided for the case where no in-kernel-tree | |
180 | modules require CRC7 functions, but a module built outside | |
181 | the kernel tree does. Such modules that use library CRC7 | |
182 | functions require M here. | |
183 | ||
1da177e4 LT |
184 | config LIBCRC32C |
185 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
93027354 | 186 | select CRYPTO |
69c35efc | 187 | select CRYPTO_CRC32C |
1da177e4 LT |
188 | help |
189 | This option is provided for the case where no in-kernel-tree | |
190 | modules require CRC32c functions, but a module built outside the | |
191 | kernel tree does. Such modules that use library CRC32c functions | |
192 | require M here. See Castagnoli93. | |
193 | Module will be libcrc32c. | |
194 | ||
7150962d AS |
195 | config CRC8 |
196 | tristate "CRC8 function" | |
197 | help | |
198 | This option provides CRC8 function. Drivers may select this | |
199 | when they need to do cyclic redundancy check according CRC8 | |
200 | algorithm. Module will be called crc8. | |
201 | ||
e65e1fc2 AV |
202 | config AUDIT_GENERIC |
203 | bool | |
204 | depends on AUDIT && !AUDIT_ARCH | |
205 | default y | |
206 | ||
4b588411 AT |
207 | config AUDIT_ARCH_COMPAT_GENERIC |
208 | bool | |
209 | default n | |
210 | ||
211 | config AUDIT_COMPAT_GENERIC | |
212 | bool | |
213 | depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT | |
214 | default y | |
215 | ||
a6a9c0f1 DB |
216 | config RANDOM32_SELFTEST |
217 | bool "PRNG perform self test on init" | |
218 | default n | |
219 | help | |
220 | This option enables the 32 bit PRNG library functions to perform a | |
221 | self test on initialization. | |
222 | ||
1da177e4 LT |
223 | # |
224 | # compression support is select'ed if needed | |
225 | # | |
2da572c9 | 226 | config 842_COMPRESS |
5b571677 | 227 | select CRC32 |
2da572c9 DS |
228 | tristate |
229 | ||
230 | config 842_DECOMPRESS | |
5b571677 | 231 | select CRC32 |
2da572c9 DS |
232 | tristate |
233 | ||
1da177e4 LT |
234 | config ZLIB_INFLATE |
235 | tristate | |
236 | ||
237 | config ZLIB_DEFLATE | |
238 | tristate | |
1fd4e5c3 | 239 | select BITREVERSE |
1da177e4 | 240 | |
64c70b1c RP |
241 | config LZO_COMPRESS |
242 | tristate | |
243 | ||
244 | config LZO_DECOMPRESS | |
245 | tristate | |
246 | ||
c72ac7a1 CM |
247 | config LZ4_COMPRESS |
248 | tristate | |
249 | ||
250 | config LZ4HC_COMPRESS | |
251 | tristate | |
252 | ||
e76e1fdf KL |
253 | config LZ4_DECOMPRESS |
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 | ||
928923c7 GU |
412 | config CHECK_SIGNATURE |
413 | bool | |
414 | ||
aab46da0 RR |
415 | config CPUMASK_OFFSTACK |
416 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS | |
417 | help | |
418 | Use dynamic allocation for cpumask_var_t, instead of putting | |
419 | them on the stack. This is a bit more expensive, but avoids | |
420 | stack overflow. | |
421 | ||
c39649c3 BH |
422 | config CPU_RMAP |
423 | bool | |
424 | depends on SMP | |
425 | ||
75957ba3 TH |
426 | config DQL |
427 | bool | |
428 | ||
b0125085 GS |
429 | config GLOB |
430 | bool | |
431 | # This actually supports modular compilation, but the module overhead | |
432 | # is ridiculous for the amount of code involved. Until an out-of-tree | |
433 | # driver asks for it, we'll just link it directly it into the kernel | |
434 | # when required. Since we're ignoring out-of-tree users, there's also | |
435 | # no need bother prompting for a manual decision: | |
436 | # prompt "glob_match() function" | |
437 | help | |
438 | This option provides a glob_match function for performing | |
439 | simple text pattern matching. It originated in the ATA code | |
440 | to blacklist particular drive models, but other device drivers | |
441 | may need similar functionality. | |
442 | ||
443 | All drivers in the Linux kernel tree that require this function | |
444 | should automatically select this option. Say N unless you | |
445 | are compiling an out-of tree driver which tells you that it | |
446 | depends on this. | |
447 | ||
5f9be824 GS |
448 | config GLOB_SELFTEST |
449 | bool "glob self-test on init" | |
450 | default n | |
451 | depends on GLOB | |
452 | help | |
453 | This option enables a simple self-test of the glob_match | |
454 | function on startup. It is primarily useful for people | |
455 | working on the code to ensure they haven't introduced any | |
456 | regressions. | |
457 | ||
458 | It only adds a little bit of code and slows kernel boot (or | |
459 | module load) by a small amount, so you're welcome to play with | |
460 | it, but you probably don't need it. | |
461 | ||
e9cc8bdd GU |
462 | # |
463 | # Netlink attribute parsing support is select'ed if needed | |
464 | # | |
465 | config NLATTR | |
466 | bool | |
467 | ||
09d4e0ed PM |
468 | # |
469 | # Generic 64-bit atomic support is selected if needed | |
470 | # | |
471 | config GENERIC_ATOMIC64 | |
472 | bool | |
473 | ||
b411b363 PR |
474 | config LRU_CACHE |
475 | tristate | |
476 | ||
c6df4b17 DM |
477 | config CLZ_TAB |
478 | bool | |
479 | ||
10f8113e | 480 | config CORDIC |
d89ce936 | 481 | tristate "CORDIC algorithm" |
10f8113e | 482 | help |
435a95c5 MW |
483 | This option provides an implementation of the CORDIC algorithm; |
484 | calculations are in fixed point. Module will be called cordic. | |
10f8113e | 485 | |
9c1c21a0 A |
486 | config DDR |
487 | bool "JEDEC DDR data" | |
488 | help | |
489 | Data from JEDEC specs for DDR SDRAM memories, | |
490 | particularly the AC timing parameters and addressing | |
491 | information. This data is useful for drivers handling | |
492 | DDR SDRAM controllers. | |
493 | ||
511cbce2 CH |
494 | config IRQ_POLL |
495 | bool "IRQ polling library" | |
496 | help | |
497 | Helper library to poll interrupt mitigation using polling. | |
498 | ||
d9c46b18 | 499 | config MPILIB |
2e5f094b | 500 | tristate |
c6df4b17 | 501 | select CLZ_TAB |
d9c46b18 DK |
502 | help |
503 | Multiprecision maths library from GnuPG. | |
504 | It is used to implement RSA digital signature verification, | |
505 | which is used by IMA/EVM digital signature extension. | |
506 | ||
5e8898e9 | 507 | config SIGNATURE |
2e5f094b | 508 | tristate |
0d1f64f6 DK |
509 | depends on KEYS |
510 | select CRYPTO | |
be440ec7 | 511 | select CRYPTO_SHA1 |
051dbb91 DK |
512 | select MPILIB |
513 | help | |
514 | Digital signature verification. Currently only RSA is supported. | |
515 | Implementation is done using GnuPG MPI library | |
516 | ||
ab253839 DD |
517 | # |
518 | # libfdt files, only selected if needed. | |
519 | # | |
520 | config LIBFDT | |
521 | bool | |
522 | ||
a77ad6ea DH |
523 | config OID_REGISTRY |
524 | tristate | |
525 | help | |
526 | Enable fast lookup object identifier registry. | |
527 | ||
0635eb8a MG |
528 | config UCS2_STRING |
529 | tristate | |
530 | ||
ee89bd6b GU |
531 | source "lib/fonts/Kconfig" |
532 | ||
f8bcbe62 RJ |
533 | config SG_SPLIT |
534 | def_bool n | |
535 | help | |
7f7e92f7 GU |
536 | Provides a helper to split scatterlists into chunks, each chunk being |
537 | a scatterlist. This should be selected by a driver or an API which | |
538 | whishes to split a scatterlist amongst multiple DMA channels. | |
f8bcbe62 | 539 | |
9b1d6c89 ML |
540 | config SG_POOL |
541 | def_bool n | |
542 | help | |
543 | Provides a helper to allocate chained scatterlists. This should be | |
544 | selected by a driver or an API which whishes to allocate chained | |
545 | scatterlist. | |
546 | ||
308c09f1 LA |
547 | # |
548 | # sg chaining option | |
549 | # | |
550 | ||
551 | config ARCH_HAS_SG_CHAIN | |
552 | def_bool n | |
553 | ||
61031952 RZ |
554 | config ARCH_HAS_PMEM_API |
555 | bool | |
556 | ||
67a3e8fe RZ |
557 | config ARCH_HAS_MMIO_FLUSH |
558 | bool | |
559 | ||
cd11016e AP |
560 | config STACKDEPOT |
561 | bool | |
562 | select STACKTRACE | |
563 | ||
88459642 OS |
564 | config SBITMAP |
565 | bool | |
566 | ||
2de4ff7b | 567 | endmenu |