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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 GENERIC_IO | |
50 | bool | |
51 | default n | |
52 | ||
53 | config STMP_DEVICE | |
54 | bool | |
55 | ||
56 | config ARCH_USE_CMPXCHG_LOCKREF | |
57 | bool | |
58 | ||
59 | config ARCH_HAS_FAST_MULTIPLIER | |
60 | bool | |
61 | ||
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 | ||
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 | ||
78 | config CRC_T10DIF | |
79 | tristate "CRC calculation for the T10 Data Integrity Field" | |
80 | select CRYPTO | |
81 | select CRYPTO_CRCT10DIF | |
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 | ||
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 | ||
95 | config CRC32 | |
96 | tristate "CRC32/CRC32c functions" | |
97 | default y | |
98 | select BITREVERSE | |
99 | help | |
100 | This option is provided for the case where no in-kernel-tree | |
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. | |
104 | ||
105 | config CRC32_SELFTEST | |
106 | tristate "CRC32 perform self test on init" | |
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 | ||
114 | choice | |
115 | prompt "CRC32 implementation" | |
116 | depends on CRC32 | |
117 | default CRC32_SLICEBY8 | |
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. | |
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 | ||
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 | ||
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 | ||
177 | config LIBCRC32C | |
178 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
179 | select CRYPTO | |
180 | select CRYPTO_CRC32C | |
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 | ||
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 | ||
195 | config AUDIT_GENERIC | |
196 | bool | |
197 | depends on AUDIT && !AUDIT_ARCH | |
198 | default y | |
199 | ||
200 | config AUDIT_ARCH_COMPAT_GENERIC | |
201 | bool | |
202 | default n | |
203 | ||
204 | config AUDIT_COMPAT_GENERIC | |
205 | bool | |
206 | depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT | |
207 | default y | |
208 | ||
209 | config RANDOM32_SELFTEST | |
210 | bool "PRNG perform self test on init" | |
211 | default n | |
212 | help | |
213 | This option enables the 32 bit PRNG library functions to perform a | |
214 | self test on initialization. | |
215 | ||
216 | # | |
217 | # compression support is select'ed if needed | |
218 | # | |
219 | config 842_COMPRESS | |
220 | select CRC32 | |
221 | tristate | |
222 | ||
223 | config 842_DECOMPRESS | |
224 | select CRC32 | |
225 | tristate | |
226 | ||
227 | config ZLIB_INFLATE | |
228 | tristate | |
229 | ||
230 | config ZLIB_DEFLATE | |
231 | tristate | |
232 | select BITREVERSE | |
233 | ||
234 | config LZO_COMPRESS | |
235 | tristate | |
236 | ||
237 | config LZO_DECOMPRESS | |
238 | tristate | |
239 | ||
240 | config LZ4_COMPRESS | |
241 | tristate | |
242 | ||
243 | config LZ4HC_COMPRESS | |
244 | tristate | |
245 | ||
246 | config LZ4_DECOMPRESS | |
247 | tristate | |
248 | ||
249 | source "lib/xz/Kconfig" | |
250 | ||
251 | # | |
252 | # These all provide a common interface (hence the apparent duplication with | |
253 | # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) | |
254 | # | |
255 | config DECOMPRESS_GZIP | |
256 | select ZLIB_INFLATE | |
257 | tristate | |
258 | ||
259 | config DECOMPRESS_BZIP2 | |
260 | tristate | |
261 | ||
262 | config DECOMPRESS_LZMA | |
263 | tristate | |
264 | ||
265 | config DECOMPRESS_XZ | |
266 | select XZ_DEC | |
267 | tristate | |
268 | ||
269 | config DECOMPRESS_LZO | |
270 | select LZO_DECOMPRESS | |
271 | tristate | |
272 | ||
273 | config DECOMPRESS_LZ4 | |
274 | select LZ4_DECOMPRESS | |
275 | tristate | |
276 | ||
277 | # | |
278 | # Generic allocator support is selected if needed | |
279 | # | |
280 | config GENERIC_ALLOCATOR | |
281 | bool | |
282 | ||
283 | # | |
284 | # reed solomon support is select'ed if needed | |
285 | # | |
286 | config REED_SOLOMON | |
287 | tristate | |
288 | ||
289 | config REED_SOLOMON_ENC8 | |
290 | bool | |
291 | ||
292 | config REED_SOLOMON_DEC8 | |
293 | bool | |
294 | ||
295 | config REED_SOLOMON_ENC16 | |
296 | bool | |
297 | ||
298 | config REED_SOLOMON_DEC16 | |
299 | bool | |
300 | ||
301 | # | |
302 | # BCH support is selected if needed | |
303 | # | |
304 | config BCH | |
305 | tristate | |
306 | ||
307 | config BCH_CONST_PARAMS | |
308 | bool | |
309 | help | |
310 | Drivers may select this option to force specific constant | |
311 | values for parameters 'm' (Galois field order) and 't' | |
312 | (error correction capability). Those specific values must | |
313 | be set by declaring default values for symbols BCH_CONST_M | |
314 | and BCH_CONST_T. | |
315 | Doing so will enable extra compiler optimizations, | |
316 | improving encoding and decoding performance up to 2x for | |
317 | usual (m,t) values (typically such that m*t < 200). | |
318 | When this option is selected, the BCH library supports | |
319 | only a single (m,t) configuration. This is mainly useful | |
320 | for NAND flash board drivers requiring known, fixed BCH | |
321 | parameters. | |
322 | ||
323 | config BCH_CONST_M | |
324 | int | |
325 | range 5 15 | |
326 | help | |
327 | Constant value for Galois field order 'm'. If 'k' is the | |
328 | number of data bits to protect, 'm' should be chosen such | |
329 | that (k + m*t) <= 2**m - 1. | |
330 | Drivers should declare a default value for this symbol if | |
331 | they select option BCH_CONST_PARAMS. | |
332 | ||
333 | config BCH_CONST_T | |
334 | int | |
335 | help | |
336 | Constant value for error correction capability in bits 't'. | |
337 | Drivers should declare a default value for this symbol if | |
338 | they select option BCH_CONST_PARAMS. | |
339 | ||
340 | # | |
341 | # Textsearch support is select'ed if needed | |
342 | # | |
343 | config TEXTSEARCH | |
344 | bool | |
345 | ||
346 | config TEXTSEARCH_KMP | |
347 | tristate | |
348 | ||
349 | config TEXTSEARCH_BM | |
350 | tristate | |
351 | ||
352 | config TEXTSEARCH_FSM | |
353 | tristate | |
354 | ||
355 | config BTREE | |
356 | bool | |
357 | ||
358 | config INTERVAL_TREE | |
359 | bool | |
360 | help | |
361 | Simple, embeddable, interval-tree. Can find the start of an | |
362 | overlapping range in log(n) time and then iterate over all | |
363 | overlapping nodes. The algorithm is implemented as an | |
364 | augmented rbtree. | |
365 | ||
366 | See: | |
367 | ||
368 | Documentation/rbtree.txt | |
369 | ||
370 | for more information. | |
371 | ||
372 | config RADIX_TREE_MULTIORDER | |
373 | bool | |
374 | ||
375 | config ASSOCIATIVE_ARRAY | |
376 | bool | |
377 | help | |
378 | Generic associative array. Can be searched and iterated over whilst | |
379 | it is being modified. It is also reasonably quick to search and | |
380 | modify. The algorithms are non-recursive, and the trees are highly | |
381 | capacious. | |
382 | ||
383 | See: | |
384 | ||
385 | Documentation/assoc_array.txt | |
386 | ||
387 | for more information. | |
388 | ||
389 | config HAS_IOMEM | |
390 | bool | |
391 | depends on !NO_IOMEM | |
392 | select GENERIC_IO | |
393 | default y | |
394 | ||
395 | config HAS_IOPORT_MAP | |
396 | bool | |
397 | depends on HAS_IOMEM && !NO_IOPORT_MAP | |
398 | default y | |
399 | ||
400 | config HAS_DMA | |
401 | bool | |
402 | depends on !NO_DMA | |
403 | default y | |
404 | ||
405 | config DMA_NOOP_OPS | |
406 | bool | |
407 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
408 | default n | |
409 | ||
410 | config DMA_VIRT_OPS | |
411 | bool | |
412 | depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT) | |
413 | default n | |
414 | ||
415 | config CHECK_SIGNATURE | |
416 | bool | |
417 | ||
418 | config CPUMASK_OFFSTACK | |
419 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS | |
420 | help | |
421 | Use dynamic allocation for cpumask_var_t, instead of putting | |
422 | them on the stack. This is a bit more expensive, but avoids | |
423 | stack overflow. | |
424 | ||
425 | config CPU_RMAP | |
426 | bool | |
427 | depends on SMP | |
428 | ||
429 | config DQL | |
430 | bool | |
431 | ||
432 | config GLOB | |
433 | bool | |
434 | # This actually supports modular compilation, but the module overhead | |
435 | # is ridiculous for the amount of code involved. Until an out-of-tree | |
436 | # driver asks for it, we'll just link it directly it into the kernel | |
437 | # when required. Since we're ignoring out-of-tree users, there's also | |
438 | # no need bother prompting for a manual decision: | |
439 | # prompt "glob_match() function" | |
440 | help | |
441 | This option provides a glob_match function for performing | |
442 | simple text pattern matching. It originated in the ATA code | |
443 | to blacklist particular drive models, but other device drivers | |
444 | may need similar functionality. | |
445 | ||
446 | All drivers in the Linux kernel tree that require this function | |
447 | should automatically select this option. Say N unless you | |
448 | are compiling an out-of tree driver which tells you that it | |
449 | depends on this. | |
450 | ||
451 | config GLOB_SELFTEST | |
452 | tristate "glob self-test on init" | |
453 | depends on GLOB | |
454 | help | |
455 | This option enables a simple self-test of the glob_match | |
456 | function on startup. It is primarily useful for people | |
457 | working on the code to ensure they haven't introduced any | |
458 | regressions. | |
459 | ||
460 | It only adds a little bit of code and slows kernel boot (or | |
461 | module load) by a small amount, so you're welcome to play with | |
462 | it, but you probably don't need it. | |
463 | ||
464 | # | |
465 | # Netlink attribute parsing support is select'ed if needed | |
466 | # | |
467 | config NLATTR | |
468 | bool | |
469 | ||
470 | # | |
471 | # Generic 64-bit atomic support is selected if needed | |
472 | # | |
473 | config GENERIC_ATOMIC64 | |
474 | bool | |
475 | ||
476 | config LRU_CACHE | |
477 | tristate | |
478 | ||
479 | config CLZ_TAB | |
480 | bool | |
481 | ||
482 | config CORDIC | |
483 | tristate "CORDIC algorithm" | |
484 | help | |
485 | This option provides an implementation of the CORDIC algorithm; | |
486 | calculations are in fixed point. Module will be called cordic. | |
487 | ||
488 | config DDR | |
489 | bool "JEDEC DDR data" | |
490 | help | |
491 | Data from JEDEC specs for DDR SDRAM memories, | |
492 | particularly the AC timing parameters and addressing | |
493 | information. This data is useful for drivers handling | |
494 | DDR SDRAM controllers. | |
495 | ||
496 | config IRQ_POLL | |
497 | bool "IRQ polling library" | |
498 | help | |
499 | Helper library to poll interrupt mitigation using polling. | |
500 | ||
501 | config MPILIB | |
502 | tristate | |
503 | select CLZ_TAB | |
504 | help | |
505 | Multiprecision maths library from GnuPG. | |
506 | It is used to implement RSA digital signature verification, | |
507 | which is used by IMA/EVM digital signature extension. | |
508 | ||
509 | config SIGNATURE | |
510 | tristate | |
511 | depends on KEYS | |
512 | select CRYPTO | |
513 | select CRYPTO_SHA1 | |
514 | select MPILIB | |
515 | help | |
516 | Digital signature verification. Currently only RSA is supported. | |
517 | Implementation is done using GnuPG MPI library | |
518 | ||
519 | # | |
520 | # libfdt files, only selected if needed. | |
521 | # | |
522 | config LIBFDT | |
523 | bool | |
524 | ||
525 | config OID_REGISTRY | |
526 | tristate | |
527 | help | |
528 | Enable fast lookup object identifier registry. | |
529 | ||
530 | config UCS2_STRING | |
531 | tristate | |
532 | ||
533 | source "lib/fonts/Kconfig" | |
534 | ||
535 | config SG_SPLIT | |
536 | def_bool n | |
537 | help | |
538 | Provides a helper to split scatterlists into chunks, each chunk being | |
539 | a scatterlist. This should be selected by a driver or an API which | |
540 | whishes to split a scatterlist amongst multiple DMA channels. | |
541 | ||
542 | config SG_POOL | |
543 | def_bool n | |
544 | help | |
545 | Provides a helper to allocate chained scatterlists. This should be | |
546 | selected by a driver or an API which whishes to allocate chained | |
547 | scatterlist. | |
548 | ||
549 | # | |
550 | # sg chaining option | |
551 | # | |
552 | ||
553 | config ARCH_HAS_SG_CHAIN | |
554 | def_bool n | |
555 | ||
556 | config ARCH_HAS_PMEM_API | |
557 | bool | |
558 | ||
559 | config ARCH_HAS_UACCESS_FLUSHCACHE | |
560 | bool | |
561 | ||
562 | config ARCH_HAS_MMIO_FLUSH | |
563 | bool | |
564 | ||
565 | config STACKDEPOT | |
566 | bool | |
567 | select STACKTRACE | |
568 | ||
569 | config SBITMAP | |
570 | bool | |
571 | ||
572 | config PARMAN | |
573 | tristate "parman" if COMPILE_TEST | |
574 | ||
575 | config PRIME_NUMBERS | |
576 | tristate | |
577 | ||
578 | endmenu |