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Commit | Line | Data |
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1 | # | |
2 | # Library configuration | |
3 | # | |
4 | ||
5 | config BINARY_PRINTF | |
6 | def_bool n | |
7 | ||
8 | menu "Library routines" | |
9 | ||
10 | config RAID6_PQ | |
11 | tristate | |
12 | ||
13 | config BITREVERSE | |
14 | tristate | |
15 | ||
16 | config HAVE_ARCH_BITREVERSE | |
17 | bool | |
18 | default n | |
19 | depends on BITREVERSE | |
20 | help | |
21 | This option enables the use of hardware bit-reversal instructions on | |
22 | architectures which support such operations. | |
23 | ||
24 | config RATIONAL | |
25 | bool | |
26 | ||
27 | config GENERIC_STRNCPY_FROM_USER | |
28 | bool | |
29 | ||
30 | config GENERIC_STRNLEN_USER | |
31 | bool | |
32 | ||
33 | config GENERIC_NET_UTILS | |
34 | bool | |
35 | ||
36 | config GENERIC_FIND_FIRST_BIT | |
37 | bool | |
38 | ||
39 | config NO_GENERIC_PCI_IOPORT_MAP | |
40 | bool | |
41 | ||
42 | config GENERIC_PCI_IOMAP | |
43 | bool | |
44 | ||
45 | config GENERIC_IOMAP | |
46 | bool | |
47 | select GENERIC_PCI_IOMAP | |
48 | ||
49 | config STMP_DEVICE | |
50 | bool | |
51 | ||
52 | config ARCH_USE_CMPXCHG_LOCKREF | |
53 | bool | |
54 | ||
55 | config ARCH_HAS_FAST_MULTIPLIER | |
56 | bool | |
57 | ||
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 | ||
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 | ||
74 | config CRC_T10DIF | |
75 | tristate "CRC calculation for the T10 Data Integrity Field" | |
76 | select CRYPTO | |
77 | select CRYPTO_CRCT10DIF | |
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 | ||
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 | ||
91 | config CRC32 | |
92 | tristate "CRC32/CRC32c functions" | |
93 | default y | |
94 | select BITREVERSE | |
95 | help | |
96 | This option is provided for the case where no in-kernel-tree | |
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. | |
100 | ||
101 | config CRC32_SELFTEST | |
102 | tristate "CRC32 perform self test on init" | |
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 | ||
110 | choice | |
111 | prompt "CRC32 implementation" | |
112 | depends on CRC32 | |
113 | default CRC32_SLICEBY8 | |
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. | |
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 | ||
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 | ||
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 | ||
173 | config LIBCRC32C | |
174 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
175 | select CRYPTO | |
176 | select CRYPTO_CRC32C | |
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 | ||
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 | ||
191 | config XXHASH | |
192 | tristate | |
193 | ||
194 | config AUDIT_GENERIC | |
195 | bool | |
196 | depends on AUDIT && !AUDIT_ARCH | |
197 | default y | |
198 | ||
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 | ||
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 | ||
215 | # | |
216 | # compression support is select'ed if needed | |
217 | # | |
218 | config 842_COMPRESS | |
219 | select CRC32 | |
220 | tristate | |
221 | ||
222 | config 842_DECOMPRESS | |
223 | select CRC32 | |
224 | tristate | |
225 | ||
226 | config ZLIB_INFLATE | |
227 | tristate | |
228 | ||
229 | config ZLIB_DEFLATE | |
230 | tristate | |
231 | select BITREVERSE | |
232 | ||
233 | config LZO_COMPRESS | |
234 | tristate | |
235 | ||
236 | config LZO_DECOMPRESS | |
237 | tristate | |
238 | ||
239 | config LZ4_COMPRESS | |
240 | tristate | |
241 | ||
242 | config LZ4HC_COMPRESS | |
243 | tristate | |
244 | ||
245 | config LZ4_DECOMPRESS | |
246 | tristate | |
247 | ||
248 | config ZSTD_COMPRESS | |
249 | select XXHASH | |
250 | tristate | |
251 | ||
252 | config ZSTD_DECOMPRESS | |
253 | select XXHASH | |
254 | tristate | |
255 | ||
256 | source "lib/xz/Kconfig" | |
257 | ||
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 | |
263 | select ZLIB_INFLATE | |
264 | tristate | |
265 | ||
266 | config DECOMPRESS_BZIP2 | |
267 | tristate | |
268 | ||
269 | config DECOMPRESS_LZMA | |
270 | tristate | |
271 | ||
272 | config DECOMPRESS_XZ | |
273 | select XZ_DEC | |
274 | tristate | |
275 | ||
276 | config DECOMPRESS_LZO | |
277 | select LZO_DECOMPRESS | |
278 | tristate | |
279 | ||
280 | config DECOMPRESS_LZ4 | |
281 | select LZ4_DECOMPRESS | |
282 | tristate | |
283 | ||
284 | # | |
285 | # Generic allocator support is selected if needed | |
286 | # | |
287 | config GENERIC_ALLOCATOR | |
288 | bool | |
289 | ||
290 | # | |
291 | # reed solomon support is select'ed if needed | |
292 | # | |
293 | config REED_SOLOMON | |
294 | tristate | |
295 | ||
296 | config REED_SOLOMON_ENC8 | |
297 | bool | |
298 | ||
299 | config REED_SOLOMON_DEC8 | |
300 | bool | |
301 | ||
302 | config REED_SOLOMON_ENC16 | |
303 | bool | |
304 | ||
305 | config REED_SOLOMON_DEC16 | |
306 | bool | |
307 | ||
308 | # | |
309 | # BCH support is selected if needed | |
310 | # | |
311 | config BCH | |
312 | tristate | |
313 | ||
314 | config BCH_CONST_PARAMS | |
315 | bool | |
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 | ||
347 | # | |
348 | # Textsearch support is select'ed if needed | |
349 | # | |
350 | config TEXTSEARCH | |
351 | bool | |
352 | ||
353 | config TEXTSEARCH_KMP | |
354 | tristate | |
355 | ||
356 | config TEXTSEARCH_BM | |
357 | tristate | |
358 | ||
359 | config TEXTSEARCH_FSM | |
360 | tristate | |
361 | ||
362 | config BTREE | |
363 | bool | |
364 | ||
365 | config INTERVAL_TREE | |
366 | bool | |
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 | ||
379 | config RADIX_TREE_MULTIORDER | |
380 | bool | |
381 | ||
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 | ||
396 | config HAS_IOMEM | |
397 | bool | |
398 | depends on !NO_IOMEM | |
399 | select GENERIC_IO | |
400 | default y | |
401 | ||
402 | config HAS_IOPORT_MAP | |
403 | bool | |
404 | depends on HAS_IOMEM && !NO_IOPORT_MAP | |
405 | default y | |
406 | ||
407 | config HAS_DMA | |
408 | bool | |
409 | depends on !NO_DMA | |
410 | default y | |
411 | ||
412 | config DMA_NOOP_OPS | |
413 | bool | |
414 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
415 | default n | |
416 | ||
417 | config DMA_VIRT_OPS | |
418 | bool | |
419 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
420 | default n | |
421 | ||
422 | config CHECK_SIGNATURE | |
423 | bool | |
424 | ||
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 | ||
432 | config CPU_RMAP | |
433 | bool | |
434 | depends on SMP | |
435 | ||
436 | config DQL | |
437 | bool | |
438 | ||
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 | ||
458 | config GLOB_SELFTEST | |
459 | tristate "glob self-test on init" | |
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 | ||
471 | # | |
472 | # Netlink attribute parsing support is select'ed if needed | |
473 | # | |
474 | config NLATTR | |
475 | bool | |
476 | ||
477 | # | |
478 | # Generic 64-bit atomic support is selected if needed | |
479 | # | |
480 | config GENERIC_ATOMIC64 | |
481 | bool | |
482 | ||
483 | config LRU_CACHE | |
484 | tristate | |
485 | ||
486 | config CLZ_TAB | |
487 | bool | |
488 | ||
489 | config CORDIC | |
490 | tristate "CORDIC algorithm" | |
491 | help | |
492 | This option provides an implementation of the CORDIC algorithm; | |
493 | calculations are in fixed point. Module will be called cordic. | |
494 | ||
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 | ||
503 | config IRQ_POLL | |
504 | bool "IRQ polling library" | |
505 | help | |
506 | Helper library to poll interrupt mitigation using polling. | |
507 | ||
508 | config MPILIB | |
509 | tristate | |
510 | select CLZ_TAB | |
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 | ||
516 | config SIGNATURE | |
517 | tristate | |
518 | depends on KEYS | |
519 | select CRYPTO | |
520 | select CRYPTO_SHA1 | |
521 | select MPILIB | |
522 | help | |
523 | Digital signature verification. Currently only RSA is supported. | |
524 | Implementation is done using GnuPG MPI library | |
525 | ||
526 | # | |
527 | # libfdt files, only selected if needed. | |
528 | # | |
529 | config LIBFDT | |
530 | bool | |
531 | ||
532 | config OID_REGISTRY | |
533 | tristate | |
534 | help | |
535 | Enable fast lookup object identifier registry. | |
536 | ||
537 | config UCS2_STRING | |
538 | tristate | |
539 | ||
540 | source "lib/fonts/Kconfig" | |
541 | ||
542 | config SG_SPLIT | |
543 | def_bool n | |
544 | help | |
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. | |
548 | ||
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 | ||
556 | # | |
557 | # sg chaining option | |
558 | # | |
559 | ||
560 | config ARCH_HAS_SG_CHAIN | |
561 | def_bool n | |
562 | ||
563 | config ARCH_HAS_PMEM_API | |
564 | bool | |
565 | ||
566 | config ARCH_HAS_UACCESS_FLUSHCACHE | |
567 | bool | |
568 | ||
569 | config STACKDEPOT | |
570 | bool | |
571 | select STACKTRACE | |
572 | ||
573 | config SBITMAP | |
574 | bool | |
575 | ||
576 | config PARMAN | |
577 | tristate "parman" if COMPILE_TEST | |
578 | ||
579 | config PRIME_NUMBERS | |
580 | tristate | |
581 | ||
582 | config STRING_SELFTEST | |
583 | tristate "Test string functions" | |
584 | ||
585 | endmenu | |
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 |