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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 | bool "CRC32 perform self test on init" | |
107 | default n | |
108 | depends on CRC32 | |
109 | help | |
110 | This option enables the CRC32 library functions to perform a | |
111 | self test on initialization. The self test computes crc32_le | |
112 | and crc32_be over byte strings with random alignment and length | |
113 | and computes the total elapsed time and number of bytes processed. | |
114 | ||
115 | choice | |
116 | prompt "CRC32 implementation" | |
117 | depends on CRC32 | |
118 | default CRC32_SLICEBY8 | |
119 | help | |
120 | This option allows a kernel builder to override the default choice | |
121 | of CRC32 algorithm. Choose the default ("slice by 8") unless you | |
122 | know that you need one of the others. | |
123 | ||
124 | config CRC32_SLICEBY8 | |
125 | bool "Slice by 8 bytes" | |
126 | help | |
127 | Calculate checksum 8 bytes at a time with a clever slicing algorithm. | |
128 | This is the fastest algorithm, but comes with a 8KiB lookup table. | |
129 | Most modern processors have enough cache to hold this table without | |
130 | thrashing the cache. | |
131 | ||
132 | This is the default implementation choice. Choose this one unless | |
133 | you have a good reason not to. | |
134 | ||
135 | config CRC32_SLICEBY4 | |
136 | bool "Slice by 4 bytes" | |
137 | help | |
138 | Calculate checksum 4 bytes at a time with a clever slicing algorithm. | |
139 | This is a bit slower than slice by 8, but has a smaller 4KiB lookup | |
140 | table. | |
141 | ||
142 | Only choose this option if you know what you are doing. | |
143 | ||
144 | config CRC32_SARWATE | |
145 | bool "Sarwate's Algorithm (one byte at a time)" | |
146 | help | |
147 | Calculate checksum a byte at a time using Sarwate's algorithm. This | |
148 | is not particularly fast, but has a small 256 byte lookup table. | |
149 | ||
150 | Only choose this option if you know what you are doing. | |
151 | ||
152 | config CRC32_BIT | |
153 | bool "Classic Algorithm (one bit at a time)" | |
154 | help | |
155 | Calculate checksum one bit at a time. This is VERY slow, but has | |
156 | no lookup table. This is provided as a debugging option. | |
157 | ||
158 | Only choose this option if you are debugging crc32. | |
159 | ||
160 | endchoice | |
161 | ||
162 | config CRC7 | |
163 | tristate "CRC7 functions" | |
164 | help | |
165 | This option is provided for the case where no in-kernel-tree | |
166 | modules require CRC7 functions, but a module built outside | |
167 | the kernel tree does. Such modules that use library CRC7 | |
168 | functions require M here. | |
169 | ||
170 | config LIBCRC32C | |
171 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" | |
172 | select CRYPTO | |
173 | select CRYPTO_CRC32C | |
174 | help | |
175 | This option is provided for the case where no in-kernel-tree | |
176 | modules require CRC32c functions, but a module built outside the | |
177 | kernel tree does. Such modules that use library CRC32c functions | |
178 | require M here. See Castagnoli93. | |
179 | Module will be libcrc32c. | |
180 | ||
181 | config CRC8 | |
182 | tristate "CRC8 function" | |
183 | help | |
184 | This option provides CRC8 function. Drivers may select this | |
185 | when they need to do cyclic redundancy check according CRC8 | |
186 | algorithm. Module will be called crc8. | |
187 | ||
188 | config AUDIT_GENERIC | |
189 | bool | |
190 | depends on AUDIT && !AUDIT_ARCH | |
191 | default y | |
192 | ||
193 | config AUDIT_ARCH_COMPAT_GENERIC | |
194 | bool | |
195 | default n | |
196 | ||
197 | config AUDIT_COMPAT_GENERIC | |
198 | bool | |
199 | depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT | |
200 | default y | |
201 | ||
202 | config RANDOM32_SELFTEST | |
203 | bool "PRNG perform self test on init" | |
204 | default n | |
205 | help | |
206 | This option enables the 32 bit PRNG library functions to perform a | |
207 | self test on initialization. | |
208 | ||
209 | # | |
210 | # compression support is select'ed if needed | |
211 | # | |
212 | config 842_COMPRESS | |
213 | select CRC32 | |
214 | tristate | |
215 | ||
216 | config 842_DECOMPRESS | |
217 | select CRC32 | |
218 | tristate | |
219 | ||
220 | config ZLIB_INFLATE | |
221 | tristate | |
222 | ||
223 | config ZLIB_DEFLATE | |
224 | tristate | |
225 | select BITREVERSE | |
226 | ||
227 | config LZO_COMPRESS | |
228 | tristate | |
229 | ||
230 | config LZO_DECOMPRESS | |
231 | tristate | |
232 | ||
233 | config LZ4_COMPRESS | |
234 | tristate | |
235 | ||
236 | config LZ4HC_COMPRESS | |
237 | tristate | |
238 | ||
239 | config LZ4_DECOMPRESS | |
240 | tristate | |
241 | ||
242 | source "lib/xz/Kconfig" | |
243 | ||
244 | # | |
245 | # These all provide a common interface (hence the apparent duplication with | |
246 | # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) | |
247 | # | |
248 | config DECOMPRESS_GZIP | |
249 | select ZLIB_INFLATE | |
250 | tristate | |
251 | ||
252 | config DECOMPRESS_BZIP2 | |
253 | tristate | |
254 | ||
255 | config DECOMPRESS_LZMA | |
256 | tristate | |
257 | ||
258 | config DECOMPRESS_XZ | |
259 | select XZ_DEC | |
260 | tristate | |
261 | ||
262 | config DECOMPRESS_LZO | |
263 | select LZO_DECOMPRESS | |
264 | tristate | |
265 | ||
266 | config DECOMPRESS_LZ4 | |
267 | select LZ4_DECOMPRESS | |
268 | tristate | |
269 | ||
270 | # | |
271 | # Generic allocator support is selected if needed | |
272 | # | |
273 | config GENERIC_ALLOCATOR | |
274 | bool | |
275 | ||
276 | # | |
277 | # reed solomon support is select'ed if needed | |
278 | # | |
279 | config REED_SOLOMON | |
280 | tristate | |
281 | ||
282 | config REED_SOLOMON_ENC8 | |
283 | bool | |
284 | ||
285 | config REED_SOLOMON_DEC8 | |
286 | bool | |
287 | ||
288 | config REED_SOLOMON_ENC16 | |
289 | bool | |
290 | ||
291 | config REED_SOLOMON_DEC16 | |
292 | bool | |
293 | ||
294 | # | |
295 | # BCH support is selected if needed | |
296 | # | |
297 | config BCH | |
298 | tristate | |
299 | ||
300 | config BCH_CONST_PARAMS | |
301 | bool | |
302 | help | |
303 | Drivers may select this option to force specific constant | |
304 | values for parameters 'm' (Galois field order) and 't' | |
305 | (error correction capability). Those specific values must | |
306 | be set by declaring default values for symbols BCH_CONST_M | |
307 | and BCH_CONST_T. | |
308 | Doing so will enable extra compiler optimizations, | |
309 | improving encoding and decoding performance up to 2x for | |
310 | usual (m,t) values (typically such that m*t < 200). | |
311 | When this option is selected, the BCH library supports | |
312 | only a single (m,t) configuration. This is mainly useful | |
313 | for NAND flash board drivers requiring known, fixed BCH | |
314 | parameters. | |
315 | ||
316 | config BCH_CONST_M | |
317 | int | |
318 | range 5 15 | |
319 | help | |
320 | Constant value for Galois field order 'm'. If 'k' is the | |
321 | number of data bits to protect, 'm' should be chosen such | |
322 | that (k + m*t) <= 2**m - 1. | |
323 | Drivers should declare a default value for this symbol if | |
324 | they select option BCH_CONST_PARAMS. | |
325 | ||
326 | config BCH_CONST_T | |
327 | int | |
328 | help | |
329 | Constant value for error correction capability in bits 't'. | |
330 | Drivers should declare a default value for this symbol if | |
331 | they select option BCH_CONST_PARAMS. | |
332 | ||
333 | # | |
334 | # Textsearch support is select'ed if needed | |
335 | # | |
336 | config TEXTSEARCH | |
337 | bool | |
338 | ||
339 | config TEXTSEARCH_KMP | |
340 | tristate | |
341 | ||
342 | config TEXTSEARCH_BM | |
343 | tristate | |
344 | ||
345 | config TEXTSEARCH_FSM | |
346 | tristate | |
347 | ||
348 | config BTREE | |
349 | bool | |
350 | ||
351 | config INTERVAL_TREE | |
352 | bool | |
353 | help | |
354 | Simple, embeddable, interval-tree. Can find the start of an | |
355 | overlapping range in log(n) time and then iterate over all | |
356 | overlapping nodes. The algorithm is implemented as an | |
357 | augmented rbtree. | |
358 | ||
359 | See: | |
360 | ||
361 | Documentation/rbtree.txt | |
362 | ||
363 | for more information. | |
364 | ||
365 | config RADIX_TREE_MULTIORDER | |
366 | bool | |
367 | ||
368 | config ASSOCIATIVE_ARRAY | |
369 | bool | |
370 | help | |
371 | Generic associative array. Can be searched and iterated over whilst | |
372 | it is being modified. It is also reasonably quick to search and | |
373 | modify. The algorithms are non-recursive, and the trees are highly | |
374 | capacious. | |
375 | ||
376 | See: | |
377 | ||
378 | Documentation/assoc_array.txt | |
379 | ||
380 | for more information. | |
381 | ||
382 | config HAS_IOMEM | |
383 | bool | |
384 | depends on !NO_IOMEM | |
385 | select GENERIC_IO | |
386 | default y | |
387 | ||
388 | config HAS_IOPORT_MAP | |
389 | bool | |
390 | depends on HAS_IOMEM && !NO_IOPORT_MAP | |
391 | default y | |
392 | ||
393 | config HAS_DMA | |
394 | bool | |
395 | depends on !NO_DMA | |
396 | default y | |
397 | ||
398 | config CHECK_SIGNATURE | |
399 | bool | |
400 | ||
401 | config CPUMASK_OFFSTACK | |
402 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS | |
403 | help | |
404 | Use dynamic allocation for cpumask_var_t, instead of putting | |
405 | them on the stack. This is a bit more expensive, but avoids | |
406 | stack overflow. | |
407 | ||
408 | config CPU_RMAP | |
409 | bool | |
410 | depends on SMP | |
411 | ||
412 | config DQL | |
413 | bool | |
414 | ||
415 | config GLOB | |
416 | bool | |
417 | # This actually supports modular compilation, but the module overhead | |
418 | # is ridiculous for the amount of code involved. Until an out-of-tree | |
419 | # driver asks for it, we'll just link it directly it into the kernel | |
420 | # when required. Since we're ignoring out-of-tree users, there's also | |
421 | # no need bother prompting for a manual decision: | |
422 | # prompt "glob_match() function" | |
423 | help | |
424 | This option provides a glob_match function for performing | |
425 | simple text pattern matching. It originated in the ATA code | |
426 | to blacklist particular drive models, but other device drivers | |
427 | may need similar functionality. | |
428 | ||
429 | All drivers in the Linux kernel tree that require this function | |
430 | should automatically select this option. Say N unless you | |
431 | are compiling an out-of tree driver which tells you that it | |
432 | depends on this. | |
433 | ||
434 | config GLOB_SELFTEST | |
435 | bool "glob self-test on init" | |
436 | default n | |
437 | depends on GLOB | |
438 | help | |
439 | This option enables a simple self-test of the glob_match | |
440 | function on startup. It is primarily useful for people | |
441 | working on the code to ensure they haven't introduced any | |
442 | regressions. | |
443 | ||
444 | It only adds a little bit of code and slows kernel boot (or | |
445 | module load) by a small amount, so you're welcome to play with | |
446 | it, but you probably don't need it. | |
447 | ||
448 | # | |
449 | # Netlink attribute parsing support is select'ed if needed | |
450 | # | |
451 | config NLATTR | |
452 | bool | |
453 | ||
454 | # | |
455 | # Generic 64-bit atomic support is selected if needed | |
456 | # | |
457 | config GENERIC_ATOMIC64 | |
458 | bool | |
459 | ||
460 | config LRU_CACHE | |
461 | tristate | |
462 | ||
463 | config CLZ_TAB | |
464 | bool | |
465 | ||
466 | config CORDIC | |
467 | tristate "CORDIC algorithm" | |
468 | help | |
469 | This option provides an implementation of the CORDIC algorithm; | |
470 | calculations are in fixed point. Module will be called cordic. | |
471 | ||
472 | config DDR | |
473 | bool "JEDEC DDR data" | |
474 | help | |
475 | Data from JEDEC specs for DDR SDRAM memories, | |
476 | particularly the AC timing parameters and addressing | |
477 | information. This data is useful for drivers handling | |
478 | DDR SDRAM controllers. | |
479 | ||
480 | config IRQ_POLL | |
481 | bool "IRQ polling library" | |
482 | help | |
483 | Helper library to poll interrupt mitigation using polling. | |
484 | ||
485 | config MPILIB | |
486 | tristate | |
487 | select CLZ_TAB | |
488 | help | |
489 | Multiprecision maths library from GnuPG. | |
490 | It is used to implement RSA digital signature verification, | |
491 | which is used by IMA/EVM digital signature extension. | |
492 | ||
493 | config SIGNATURE | |
494 | tristate | |
495 | depends on KEYS | |
496 | select CRYPTO | |
497 | select CRYPTO_SHA1 | |
498 | select MPILIB | |
499 | help | |
500 | Digital signature verification. Currently only RSA is supported. | |
501 | Implementation is done using GnuPG MPI library | |
502 | ||
503 | # | |
504 | # libfdt files, only selected if needed. | |
505 | # | |
506 | config LIBFDT | |
507 | bool | |
508 | ||
509 | config OID_REGISTRY | |
510 | tristate | |
511 | help | |
512 | Enable fast lookup object identifier registry. | |
513 | ||
514 | config UCS2_STRING | |
515 | tristate | |
516 | ||
517 | source "lib/fonts/Kconfig" | |
518 | ||
519 | config SG_SPLIT | |
520 | def_bool n | |
521 | help | |
522 | Provides a helper to split scatterlists into chunks, each chunk being | |
523 | a scatterlist. This should be selected by a driver or an API which | |
524 | whishes to split a scatterlist amongst multiple DMA channels. | |
525 | ||
526 | config SG_POOL | |
527 | def_bool n | |
528 | help | |
529 | Provides a helper to allocate chained scatterlists. This should be | |
530 | selected by a driver or an API which whishes to allocate chained | |
531 | scatterlist. | |
532 | ||
533 | # | |
534 | # sg chaining option | |
535 | # | |
536 | ||
537 | config ARCH_HAS_SG_CHAIN | |
538 | def_bool n | |
539 | ||
540 | config ARCH_HAS_PMEM_API | |
541 | bool | |
542 | ||
543 | config ARCH_HAS_MMIO_FLUSH | |
544 | bool | |
545 | ||
546 | config STACKDEPOT | |
547 | bool | |
548 | select STACKTRACE | |
549 | ||
550 | config SBITMAP | |
551 | bool | |
552 | ||
553 | endmenu |