Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

Linux/lib/Kconfig

  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 PERCPU_RWSEM
 57         bool
 58 
 59 config ARCH_USE_CMPXCHG_LOCKREF
 60         bool
 61 
 62 config ARCH_HAS_FAST_MULTIPLIER
 63         bool
 64 
 65 config CRC_CCITT
 66         tristate "CRC-CCITT functions"
 67         help
 68           This option is provided for the case where no in-kernel-tree
 69           modules require CRC-CCITT functions, but a module built outside
 70           the kernel tree does. Such modules that use library CRC-CCITT
 71           functions require M here.
 72 
 73 config CRC16
 74         tristate "CRC16 functions"
 75         help
 76           This option is provided for the case where no in-kernel-tree
 77           modules require CRC16 functions, but a module built outside
 78           the kernel tree does. Such modules that use library CRC16
 79           functions require M here.
 80 
 81 config CRC_T10DIF
 82         tristate "CRC calculation for the T10 Data Integrity Field"
 83         select CRYPTO
 84         select CRYPTO_CRCT10DIF
 85         help
 86           This option is only needed if a module that's not in the
 87           kernel tree needs to calculate CRC checks for use with the
 88           SCSI data integrity subsystem.
 89 
 90 config CRC_ITU_T
 91         tristate "CRC ITU-T V.41 functions"
 92         help
 93           This option is provided for the case where no in-kernel-tree
 94           modules require CRC ITU-T V.41 functions, but a module built outside
 95           the kernel tree does. Such modules that use library CRC ITU-T V.41
 96           functions require M here.
 97 
 98 config CRC32
 99         tristate "CRC32/CRC32c functions"
100         default y
101         select BITREVERSE
102         help
103           This option is provided for the case where no in-kernel-tree
104           modules require CRC32/CRC32c functions, but a module built outside
105           the kernel tree does. Such modules that use library CRC32/CRC32c
106           functions require M here.
107 
108 config CRC32_SELFTEST
109         bool "CRC32 perform self test on init"
110         default n
111         depends on CRC32
112         help
113           This option enables the CRC32 library functions to perform a
114           self test on initialization. The self test computes crc32_le
115           and crc32_be over byte strings with random alignment and length
116           and computes the total elapsed time and number of bytes processed.
117 
118 choice
119         prompt "CRC32 implementation"
120         depends on CRC32
121         default CRC32_SLICEBY8
122         help
123           This option allows a kernel builder to override the default choice
124           of CRC32 algorithm.  Choose the default ("slice by 8") unless you
125           know that you need one of the others.
126 
127 config CRC32_SLICEBY8
128         bool "Slice by 8 bytes"
129         help
130           Calculate checksum 8 bytes at a time with a clever slicing algorithm.
131           This is the fastest algorithm, but comes with a 8KiB lookup table.
132           Most modern processors have enough cache to hold this table without
133           thrashing the cache.
134 
135           This is the default implementation choice.  Choose this one unless
136           you have a good reason not to.
137 
138 config CRC32_SLICEBY4
139         bool "Slice by 4 bytes"
140         help
141           Calculate checksum 4 bytes at a time with a clever slicing algorithm.
142           This is a bit slower than slice by 8, but has a smaller 4KiB lookup
143           table.
144 
145           Only choose this option if you know what you are doing.
146 
147 config CRC32_SARWATE
148         bool "Sarwate's Algorithm (one byte at a time)"
149         help
150           Calculate checksum a byte at a time using Sarwate's algorithm.  This
151           is not particularly fast, but has a small 256 byte lookup table.
152 
153           Only choose this option if you know what you are doing.
154 
155 config CRC32_BIT
156         bool "Classic Algorithm (one bit at a time)"
157         help
158           Calculate checksum one bit at a time.  This is VERY slow, but has
159           no lookup table.  This is provided as a debugging option.
160 
161           Only choose this option if you are debugging crc32.
162 
163 endchoice
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 AUDIT_GENERIC
192         bool
193         depends on AUDIT && !AUDIT_ARCH
194         default y
195 
196 config AUDIT_ARCH_COMPAT_GENERIC
197         bool
198         default n
199 
200 config AUDIT_COMPAT_GENERIC
201         bool
202         depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
203         default y
204 
205 config RANDOM32_SELFTEST
206         bool "PRNG perform self test on init"
207         default n
208         help
209           This option enables the 32 bit PRNG library functions to perform a
210           self test on initialization.
211 
212 #
213 # compression support is select'ed if needed
214 #
215 config 842_COMPRESS
216         tristate
217 
218 config 842_DECOMPRESS
219         tristate
220 
221 config ZLIB_INFLATE
222         tristate
223 
224 config ZLIB_DEFLATE
225         tristate
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 ASSOCIATIVE_ARRAY
366         bool
367         help
368           Generic associative array.  Can be searched and iterated over whilst
369           it is being modified.  It is also reasonably quick to search and
370           modify.  The algorithms are non-recursive, and the trees are highly
371           capacious.
372 
373           See:
374 
375                 Documentation/assoc_array.txt
376 
377           for more information.
378 
379 config HAS_IOMEM
380         bool
381         depends on !NO_IOMEM
382         select GENERIC_IO
383         default y
384 
385 config HAS_IOPORT_MAP
386         bool
387         depends on HAS_IOMEM && !NO_IOPORT_MAP
388         default y
389 
390 config HAS_DMA
391         bool
392         depends on !NO_DMA
393         default y
394 
395 config CHECK_SIGNATURE
396         bool
397 
398 config CPUMASK_OFFSTACK
399         bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
400         help
401           Use dynamic allocation for cpumask_var_t, instead of putting
402           them on the stack.  This is a bit more expensive, but avoids
403           stack overflow.
404 
405 config CPU_RMAP
406         bool
407         depends on SMP
408 
409 config DQL
410         bool
411 
412 config GLOB
413         bool
414 #       This actually supports modular compilation, but the module overhead
415 #       is ridiculous for the amount of code involved.  Until an out-of-tree
416 #       driver asks for it, we'll just link it directly it into the kernel
417 #       when required.  Since we're ignoring out-of-tree users, there's also
418 #       no need bother prompting for a manual decision:
419 #       prompt "glob_match() function"
420         help
421           This option provides a glob_match function for performing
422           simple text pattern matching.  It originated in the ATA code
423           to blacklist particular drive models, but other device drivers
424           may need similar functionality.
425 
426           All drivers in the Linux kernel tree that require this function
427           should automatically select this option.  Say N unless you
428           are compiling an out-of tree driver which tells you that it
429           depends on this.
430 
431 config GLOB_SELFTEST
432         bool "glob self-test on init"
433         default n
434         depends on GLOB
435         help
436           This option enables a simple self-test of the glob_match
437           function on startup.  It is primarily useful for people
438           working on the code to ensure they haven't introduced any
439           regressions.
440 
441           It only adds a little bit of code and slows kernel boot (or
442           module load) by a small amount, so you're welcome to play with
443           it, but you probably don't need it.
444 
445 #
446 # Netlink attribute parsing support is select'ed if needed
447 #
448 config NLATTR
449         bool
450 
451 #
452 # Generic 64-bit atomic support is selected if needed
453 #
454 config GENERIC_ATOMIC64
455        bool
456 
457 config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
458         def_bool y if GENERIC_ATOMIC64
459 
460 config LRU_CACHE
461         tristate
462 
463 config AVERAGE
464         bool "Averaging functions"
465         help
466           This option is provided for the case where no in-kernel-tree
467           modules require averaging functions, but a module built outside
468           the kernel tree does. Such modules that use library averaging
469           functions require Y here.
470 
471           If unsure, say N.
472 
473 config CLZ_TAB
474         bool
475 
476 config CORDIC
477         tristate "CORDIC algorithm"
478         help
479           This option provides an implementation of the CORDIC algorithm;
480           calculations are in fixed point. Module will be called cordic.
481 
482 config DDR
483         bool "JEDEC DDR data"
484         help
485           Data from JEDEC specs for DDR SDRAM memories,
486           particularly the AC timing parameters and addressing
487           information. This data is useful for drivers handling
488           DDR SDRAM controllers.
489 
490 config MPILIB
491         tristate
492         select CLZ_TAB
493         help
494           Multiprecision maths library from GnuPG.
495           It is used to implement RSA digital signature verification,
496           which is used by IMA/EVM digital signature extension.
497 
498 config SIGNATURE
499         tristate
500         depends on KEYS
501         select CRYPTO
502         select CRYPTO_SHA1
503         select MPILIB
504         help
505           Digital signature verification. Currently only RSA is supported.
506           Implementation is done using GnuPG MPI library
507 
508 #
509 # libfdt files, only selected if needed.
510 #
511 config LIBFDT
512         bool
513 
514 config OID_REGISTRY
515         tristate
516         help
517           Enable fast lookup object identifier registry.
518 
519 config UCS2_STRING
520         tristate
521 
522 source "lib/fonts/Kconfig"
523 
524 #
525 # sg chaining option
526 #
527 
528 config ARCH_HAS_SG_CHAIN
529         def_bool n
530 
531 config ARCH_HAS_PMEM_API
532         bool
533 
534 endmenu

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us