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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 RATIONAL |
17 | boolean |
18 | |
19 | config GENERIC_STRNCPY_FROM_USER |
20 | bool |
21 | |
22 | config GENERIC_STRNLEN_USER |
23 | bool |
24 | |
25 | config GENERIC_FIND_FIRST_BIT |
26 | bool |
27 | |
28 | config NO_GENERIC_PCI_IOPORT_MAP |
29 | bool |
30 | |
31 | config GENERIC_PCI_IOMAP |
32 | bool |
33 | |
34 | config GENERIC_IOMAP |
35 | bool |
36 | select GENERIC_PCI_IOMAP |
37 | |
38 | config GENERIC_IO |
39 | boolean |
40 | default n |
41 | |
42 | config STMP_DEVICE |
43 | bool |
44 | |
45 | config PERCPU_RWSEM |
46 | boolean |
47 | |
48 | config CRC_CCITT |
49 | tristate "CRC-CCITT functions" |
50 | help |
51 | This option is provided for the case where no in-kernel-tree |
52 | modules require CRC-CCITT functions, but a module built outside |
53 | the kernel tree does. Such modules that use library CRC-CCITT |
54 | functions require M here. |
55 | |
56 | config CRC16 |
57 | tristate "CRC16 functions" |
58 | help |
59 | This option is provided for the case where no in-kernel-tree |
60 | modules require CRC16 functions, but a module built outside |
61 | the kernel tree does. Such modules that use library CRC16 |
62 | functions require M here. |
63 | |
64 | config CRC_T10DIF |
65 | tristate "CRC calculation for the T10 Data Integrity Field" |
66 | help |
67 | This option is only needed if a module that's not in the |
68 | kernel tree needs to calculate CRC checks for use with the |
69 | SCSI data integrity subsystem. |
70 | |
71 | config CRC_ITU_T |
72 | tristate "CRC ITU-T V.41 functions" |
73 | help |
74 | This option is provided for the case where no in-kernel-tree |
75 | modules require CRC ITU-T V.41 functions, but a module built outside |
76 | the kernel tree does. Such modules that use library CRC ITU-T V.41 |
77 | functions require M here. |
78 | |
79 | config CRC32 |
80 | tristate "CRC32/CRC32c functions" |
81 | default y |
82 | select BITREVERSE |
83 | help |
84 | This option is provided for the case where no in-kernel-tree |
85 | modules require CRC32/CRC32c functions, but a module built outside |
86 | the kernel tree does. Such modules that use library CRC32/CRC32c |
87 | functions require M here. |
88 | |
89 | config CRC32_SELFTEST |
90 | bool "CRC32 perform self test on init" |
91 | default n |
92 | depends on CRC32 |
93 | help |
94 | This option enables the CRC32 library functions to perform a |
95 | self test on initialization. The self test computes crc32_le |
96 | and crc32_be over byte strings with random alignment and length |
97 | and computes the total elapsed time and number of bytes processed. |
98 | |
99 | choice |
100 | prompt "CRC32 implementation" |
101 | depends on CRC32 |
102 | default CRC32_SLICEBY8 |
103 | help |
104 | This option allows a kernel builder to override the default choice |
105 | of CRC32 algorithm. Choose the default ("slice by 8") unless you |
106 | know that you need one of the others. |
107 | |
108 | config CRC32_SLICEBY8 |
109 | bool "Slice by 8 bytes" |
110 | help |
111 | Calculate checksum 8 bytes at a time with a clever slicing algorithm. |
112 | This is the fastest algorithm, but comes with a 8KiB lookup table. |
113 | Most modern processors have enough cache to hold this table without |
114 | thrashing the cache. |
115 | |
116 | This is the default implementation choice. Choose this one unless |
117 | you have a good reason not to. |
118 | |
119 | config CRC32_SLICEBY4 |
120 | bool "Slice by 4 bytes" |
121 | help |
122 | Calculate checksum 4 bytes at a time with a clever slicing algorithm. |
123 | This is a bit slower than slice by 8, but has a smaller 4KiB lookup |
124 | table. |
125 | |
126 | Only choose this option if you know what you are doing. |
127 | |
128 | config CRC32_SARWATE |
129 | bool "Sarwate's Algorithm (one byte at a time)" |
130 | help |
131 | Calculate checksum a byte at a time using Sarwate's algorithm. This |
132 | is not particularly fast, but has a small 256 byte lookup table. |
133 | |
134 | Only choose this option if you know what you are doing. |
135 | |
136 | config CRC32_BIT |
137 | bool "Classic Algorithm (one bit at a time)" |
138 | help |
139 | Calculate checksum one bit at a time. This is VERY slow, but has |
140 | no lookup table. This is provided as a debugging option. |
141 | |
142 | Only choose this option if you are debugging crc32. |
143 | |
144 | endchoice |
145 | |
146 | config CRC7 |
147 | tristate "CRC7 functions" |
148 | help |
149 | This option is provided for the case where no in-kernel-tree |
150 | modules require CRC7 functions, but a module built outside |
151 | the kernel tree does. Such modules that use library CRC7 |
152 | functions require M here. |
153 | |
154 | config LIBCRC32C |
155 | tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" |
156 | select CRYPTO |
157 | select CRYPTO_CRC32C |
158 | help |
159 | This option is provided for the case where no in-kernel-tree |
160 | modules require CRC32c functions, but a module built outside the |
161 | kernel tree does. Such modules that use library CRC32c functions |
162 | require M here. See Castagnoli93. |
163 | Module will be libcrc32c. |
164 | |
165 | config CRC8 |
166 | tristate "CRC8 function" |
167 | help |
168 | This option provides CRC8 function. Drivers may select this |
169 | when they need to do cyclic redundancy check according CRC8 |
170 | algorithm. Module will be called crc8. |
171 | |
172 | config AUDIT_GENERIC |
173 | bool |
174 | depends on AUDIT && !AUDIT_ARCH |
175 | default y |
176 | |
177 | # |
178 | # compression support is select'ed if needed |
179 | # |
180 | config ZLIB_INFLATE |
181 | tristate |
182 | |
183 | config ZLIB_DEFLATE |
184 | tristate |
185 | |
186 | config LZO_COMPRESS |
187 | tristate |
188 | |
189 | config LZO_DECOMPRESS |
190 | tristate |
191 | |
192 | source "lib/xz/Kconfig" |
193 | |
194 | # |
195 | # These all provide a common interface (hence the apparent duplication with |
196 | # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) |
197 | # |
198 | config DECOMPRESS_GZIP |
199 | select ZLIB_INFLATE |
200 | tristate |
201 | |
202 | config DECOMPRESS_BZIP2 |
203 | tristate |
204 | |
205 | config DECOMPRESS_LZMA |
206 | tristate |
207 | |
208 | config DECOMPRESS_XZ |
209 | select XZ_DEC |
210 | tristate |
211 | |
212 | config DECOMPRESS_LZO |
213 | select LZO_DECOMPRESS |
214 | tristate |
215 | |
216 | # |
217 | # Generic allocator support is selected if needed |
218 | # |
219 | config GENERIC_ALLOCATOR |
220 | boolean |
221 | |
222 | # |
223 | # reed solomon support is select'ed if needed |
224 | # |
225 | config REED_SOLOMON |
226 | tristate |
227 | |
228 | config REED_SOLOMON_ENC8 |
229 | boolean |
230 | |
231 | config REED_SOLOMON_DEC8 |
232 | boolean |
233 | |
234 | config REED_SOLOMON_ENC16 |
235 | boolean |
236 | |
237 | config REED_SOLOMON_DEC16 |
238 | boolean |
239 | |
240 | # |
241 | # BCH support is selected if needed |
242 | # |
243 | config BCH |
244 | tristate |
245 | |
246 | config BCH_CONST_PARAMS |
247 | boolean |
248 | help |
249 | Drivers may select this option to force specific constant |
250 | values for parameters 'm' (Galois field order) and 't' |
251 | (error correction capability). Those specific values must |
252 | be set by declaring default values for symbols BCH_CONST_M |
253 | and BCH_CONST_T. |
254 | Doing so will enable extra compiler optimizations, |
255 | improving encoding and decoding performance up to 2x for |
256 | usual (m,t) values (typically such that m*t < 200). |
257 | When this option is selected, the BCH library supports |
258 | only a single (m,t) configuration. This is mainly useful |
259 | for NAND flash board drivers requiring known, fixed BCH |
260 | parameters. |
261 | |
262 | config BCH_CONST_M |
263 | int |
264 | range 5 15 |
265 | help |
266 | Constant value for Galois field order 'm'. If 'k' is the |
267 | number of data bits to protect, 'm' should be chosen such |
268 | that (k + m*t) <= 2**m - 1. |
269 | Drivers should declare a default value for this symbol if |
270 | they select option BCH_CONST_PARAMS. |
271 | |
272 | config BCH_CONST_T |
273 | int |
274 | help |
275 | Constant value for error correction capability in bits 't'. |
276 | Drivers should declare a default value for this symbol if |
277 | they select option BCH_CONST_PARAMS. |
278 | |
279 | # |
280 | # Textsearch support is select'ed if needed |
281 | # |
282 | config TEXTSEARCH |
283 | boolean |
284 | |
285 | config TEXTSEARCH_KMP |
286 | tristate |
287 | |
288 | config TEXTSEARCH_BM |
289 | tristate |
290 | |
291 | config TEXTSEARCH_FSM |
292 | tristate |
293 | |
294 | config BTREE |
295 | boolean |
296 | |
297 | config HAS_IOMEM |
298 | boolean |
299 | depends on !NO_IOMEM |
300 | select GENERIC_IO |
301 | default y |
302 | |
303 | config HAS_IOPORT |
304 | boolean |
305 | depends on HAS_IOMEM && !NO_IOPORT |
306 | default y |
307 | |
308 | config HAS_DMA |
309 | boolean |
310 | depends on !NO_DMA |
311 | default y |
312 | |
313 | config CHECK_SIGNATURE |
314 | bool |
315 | |
316 | config CPUMASK_OFFSTACK |
317 | bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS |
318 | help |
319 | Use dynamic allocation for cpumask_var_t, instead of putting |
320 | them on the stack. This is a bit more expensive, but avoids |
321 | stack overflow. |
322 | |
323 | config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS |
324 | bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS |
325 | depends on BROKEN |
326 | |
327 | config CPU_RMAP |
328 | bool |
329 | depends on SMP |
330 | |
331 | config DQL |
332 | bool |
333 | |
334 | # |
335 | # Netlink attribute parsing support is select'ed if needed |
336 | # |
337 | config NLATTR |
338 | bool |
339 | |
340 | # |
341 | # Generic 64-bit atomic support is selected if needed |
342 | # |
343 | config GENERIC_ATOMIC64 |
344 | bool |
345 | |
346 | config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
347 | def_bool y if GENERIC_ATOMIC64 |
348 | |
349 | config LRU_CACHE |
350 | tristate |
351 | |
352 | config AVERAGE |
353 | bool "Averaging functions" |
354 | help |
355 | This option is provided for the case where no in-kernel-tree |
356 | modules require averaging functions, but a module built outside |
357 | the kernel tree does. Such modules that use library averaging |
358 | functions require Y here. |
359 | |
360 | If unsure, say N. |
361 | |
362 | config CLZ_TAB |
363 | bool |
364 | |
365 | config CORDIC |
366 | tristate "CORDIC algorithm" |
367 | help |
368 | This option provides an implementation of the CORDIC algorithm; |
369 | calculations are in fixed point. Module will be called cordic. |
370 | |
371 | config DDR |
372 | bool "JEDEC DDR data" |
373 | help |
374 | Data from JEDEC specs for DDR SDRAM memories, |
375 | particularly the AC timing parameters and addressing |
376 | information. This data is useful for drivers handling |
377 | DDR SDRAM controllers. |
378 | |
379 | config MPILIB |
380 | tristate |
381 | select CLZ_TAB |
382 | help |
383 | Multiprecision maths library from GnuPG. |
384 | It is used to implement RSA digital signature verification, |
385 | which is used by IMA/EVM digital signature extension. |
386 | |
387 | config SIGNATURE |
388 | tristate |
389 | depends on KEYS && CRYPTO |
390 | select CRYPTO_SHA1 |
391 | select MPILIB |
392 | help |
393 | Digital signature verification. Currently only RSA is supported. |
394 | Implementation is done using GnuPG MPI library |
395 | |
396 | # |
397 | # libfdt files, only selected if needed. |
398 | # |
399 | config LIBFDT |
400 | bool |
401 | |
402 | config OID_REGISTRY |
403 | tristate |
404 | help |
405 | Enable fast lookup object identifier registry. |
406 | |
407 | config UCS2_STRING |
408 | tristate |
409 | |
410 | endmenu |
411 |
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Tags:
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