1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # 1 #
3 # Library configuration 2 # Library configuration
4 # 3 #
5 4
6 config BINARY_PRINTF 5 config BINARY_PRINTF
7 def_bool n 6 def_bool n
8 7
9 menu "Library routines" 8 menu "Library routines"
10 9
11 config RAID6_PQ 10 config RAID6_PQ
12 tristate 11 tristate
13 12
14 config RAID6_PQ_BENCHMARK <<
15 bool "Automatically choose fastest RAI <<
16 depends on RAID6_PQ <<
17 default y <<
18 help <<
19 Benchmark all available RAID6 PQ fun <<
20 fastest one. <<
21 <<
22 config LINEAR_RANGES <<
23 tristate <<
24 <<
25 config PACKING <<
26 bool "Generic bitfield packing and unp <<
27 select BITREVERSE <<
28 default n <<
29 help <<
30 This option provides the packing() h <<
31 converting bitfields between a CPU-u <<
32 memory representation that can have <<
33 - Is little endian (bytes are reve <<
34 - The least-significant 32-bit wor <<
35 group) <<
36 - The most significant bit of a by <<
37 register description is numerica <<
38 Drivers may use these helpers to mat <<
39 in the data sheets of the peripheral <<
40 <<
41 When in doubt, say N. <<
42 <<
43 config BITREVERSE 13 config BITREVERSE
44 tristate 14 tristate
45 15
46 config HAVE_ARCH_BITREVERSE 16 config HAVE_ARCH_BITREVERSE
47 bool 17 bool
48 default n 18 default n
>> 19 depends on BITREVERSE
49 help 20 help
50 This option enables the use of hardw 21 This option enables the use of hardware bit-reversal instructions on
51 architectures which support such ope 22 architectures which support such operations.
52 23
53 config ARCH_HAS_STRNCPY_FROM_USER !! 24 config RATIONAL
54 bool <<
55 <<
56 config ARCH_HAS_STRNLEN_USER <<
57 bool 25 bool
58 26
59 config GENERIC_STRNCPY_FROM_USER 27 config GENERIC_STRNCPY_FROM_USER
60 def_bool !ARCH_HAS_STRNCPY_FROM_USER !! 28 bool
61 29
62 config GENERIC_STRNLEN_USER 30 config GENERIC_STRNLEN_USER
63 def_bool !ARCH_HAS_STRNLEN_USER !! 31 bool
64 32
65 config GENERIC_NET_UTILS 33 config GENERIC_NET_UTILS
66 bool 34 bool
67 35
68 source "lib/math/Kconfig" !! 36 config GENERIC_FIND_FIRST_BIT
>> 37 bool
69 38
70 config NO_GENERIC_PCI_IOPORT_MAP 39 config NO_GENERIC_PCI_IOPORT_MAP
71 bool 40 bool
72 41
>> 42 config GENERIC_PCI_IOMAP
>> 43 bool
>> 44
73 config GENERIC_IOMAP 45 config GENERIC_IOMAP
74 bool 46 bool
75 select GENERIC_PCI_IOMAP 47 select GENERIC_PCI_IOMAP
76 48
>> 49 config GENERIC_IO
>> 50 bool
>> 51 default n
>> 52
77 config STMP_DEVICE 53 config STMP_DEVICE
78 bool 54 bool
79 55
80 config ARCH_USE_CMPXCHG_LOCKREF 56 config ARCH_USE_CMPXCHG_LOCKREF
81 bool 57 bool
82 58
83 config ARCH_HAS_FAST_MULTIPLIER 59 config ARCH_HAS_FAST_MULTIPLIER
84 bool 60 bool
85 61
86 config ARCH_USE_SYM_ANNOTATIONS <<
87 bool <<
88 <<
89 config INDIRECT_PIO <<
90 bool "Access I/O in non-MMIO mode" <<
91 depends on ARM64 <<
92 depends on HAS_IOPORT <<
93 help <<
94 On some platforms where no separate <<
95 hosts which can not be accessed in M <<
96 mechanism, the host-local I/O resour <<
97 logic PIO space shared with MMIO hos <<
98 system can access the I/O devices wi <<
99 I/O accessors. <<
100 <<
101 This way has relatively little I/O p <<
102 sure your devices really need this c <<
103 <<
104 When in doubt, say N. <<
105 <<
106 config INDIRECT_IOMEM <<
107 bool <<
108 help <<
109 This is selected by other options/ar <<
110 emulated iomem accessors. <<
111 <<
112 config INDIRECT_IOMEM_FALLBACK <<
113 bool <<
114 depends on INDIRECT_IOMEM <<
115 help <<
116 If INDIRECT_IOMEM is selected, this <<
117 mmio accesses when the IO memory add <<
118 emulated region. <<
119 <<
120 config TRACE_MMIO_ACCESS <<
121 bool "Register read/write tracing" <<
122 depends on TRACING && ARCH_HAVE_TRACE_ <<
123 help <<
124 Create tracepoints for MMIO read/wri <<
125 can be used for logging all MMIO rea <<
126 <<
127 source "lib/crypto/Kconfig" <<
128 <<
129 config CRC_CCITT 62 config CRC_CCITT
130 tristate "CRC-CCITT functions" 63 tristate "CRC-CCITT functions"
131 help 64 help
132 This option is provided for the case 65 This option is provided for the case where no in-kernel-tree
133 modules require CRC-CCITT functions, 66 modules require CRC-CCITT functions, but a module built outside
134 the kernel tree does. Such modules t 67 the kernel tree does. Such modules that use library CRC-CCITT
135 functions require M here. 68 functions require M here.
136 69
137 config CRC16 70 config CRC16
138 tristate "CRC16 functions" 71 tristate "CRC16 functions"
139 help 72 help
140 This option is provided for the case 73 This option is provided for the case where no in-kernel-tree
141 modules require CRC16 functions, but 74 modules require CRC16 functions, but a module built outside
142 the kernel tree does. Such modules t 75 the kernel tree does. Such modules that use library CRC16
143 functions require M here. 76 functions require M here.
144 77
145 config CRC_T10DIF 78 config CRC_T10DIF
146 tristate "CRC calculation for the T10 79 tristate "CRC calculation for the T10 Data Integrity Field"
147 select CRYPTO 80 select CRYPTO
148 select CRYPTO_CRCT10DIF 81 select CRYPTO_CRCT10DIF
149 help 82 help
150 This option is only needed if a modu 83 This option is only needed if a module that's not in the
151 kernel tree needs to calculate CRC c 84 kernel tree needs to calculate CRC checks for use with the
152 SCSI data integrity subsystem. 85 SCSI data integrity subsystem.
153 86
154 config CRC64_ROCKSOFT <<
155 tristate "CRC calculation for the Rock <<
156 select CRC64 <<
157 select CRYPTO <<
158 select CRYPTO_CRC64_ROCKSOFT <<
159 help <<
160 This option provides a CRC64 API to <<
161 This is used with the block layer's <<
162 <<
163 config CRC_ITU_T 87 config CRC_ITU_T
164 tristate "CRC ITU-T V.41 functions" 88 tristate "CRC ITU-T V.41 functions"
165 help 89 help
166 This option is provided for the case 90 This option is provided for the case where no in-kernel-tree
167 modules require CRC ITU-T V.41 funct 91 modules require CRC ITU-T V.41 functions, but a module built outside
168 the kernel tree does. Such modules t 92 the kernel tree does. Such modules that use library CRC ITU-T V.41
169 functions require M here. 93 functions require M here.
170 94
171 config CRC32 95 config CRC32
172 tristate "CRC32/CRC32c functions" 96 tristate "CRC32/CRC32c functions"
173 default y 97 default y
174 select BITREVERSE 98 select BITREVERSE
175 help 99 help
176 This option is provided for the case 100 This option is provided for the case where no in-kernel-tree
177 modules require CRC32/CRC32c functio 101 modules require CRC32/CRC32c functions, but a module built outside
178 the kernel tree does. Such modules t 102 the kernel tree does. Such modules that use library CRC32/CRC32c
179 functions require M here. 103 functions require M here.
180 104
181 config CRC32_SELFTEST 105 config CRC32_SELFTEST
182 tristate "CRC32 perform self test on i !! 106 bool "CRC32 perform self test on init"
>> 107 default n
183 depends on CRC32 108 depends on CRC32
184 help 109 help
185 This option enables the CRC32 librar 110 This option enables the CRC32 library functions to perform a
186 self test on initialization. The sel 111 self test on initialization. The self test computes crc32_le
187 and crc32_be over byte strings with 112 and crc32_be over byte strings with random alignment and length
188 and computes the total elapsed time 113 and computes the total elapsed time and number of bytes processed.
189 114
190 choice 115 choice
191 prompt "CRC32 implementation" 116 prompt "CRC32 implementation"
192 depends on CRC32 117 depends on CRC32
193 default CRC32_SLICEBY8 118 default CRC32_SLICEBY8
194 help 119 help
195 This option allows a kernel builder 120 This option allows a kernel builder to override the default choice
196 of CRC32 algorithm. Choose the defa 121 of CRC32 algorithm. Choose the default ("slice by 8") unless you
197 know that you need one of the others 122 know that you need one of the others.
198 123
199 config CRC32_SLICEBY8 124 config CRC32_SLICEBY8
200 bool "Slice by 8 bytes" 125 bool "Slice by 8 bytes"
201 help 126 help
202 Calculate checksum 8 bytes at a time 127 Calculate checksum 8 bytes at a time with a clever slicing algorithm.
203 This is the fastest algorithm, but c 128 This is the fastest algorithm, but comes with a 8KiB lookup table.
204 Most modern processors have enough c 129 Most modern processors have enough cache to hold this table without
205 thrashing the cache. 130 thrashing the cache.
206 131
207 This is the default implementation c 132 This is the default implementation choice. Choose this one unless
208 you have a good reason not to. 133 you have a good reason not to.
209 134
210 config CRC32_SLICEBY4 135 config CRC32_SLICEBY4
211 bool "Slice by 4 bytes" 136 bool "Slice by 4 bytes"
212 help 137 help
213 Calculate checksum 4 bytes at a time 138 Calculate checksum 4 bytes at a time with a clever slicing algorithm.
214 This is a bit slower than slice by 8 139 This is a bit slower than slice by 8, but has a smaller 4KiB lookup
215 table. 140 table.
216 141
217 Only choose this option if you know 142 Only choose this option if you know what you are doing.
218 143
219 config CRC32_SARWATE 144 config CRC32_SARWATE
220 bool "Sarwate's Algorithm (one byte at 145 bool "Sarwate's Algorithm (one byte at a time)"
221 help 146 help
222 Calculate checksum a byte at a time 147 Calculate checksum a byte at a time using Sarwate's algorithm. This
223 is not particularly fast, but has a 148 is not particularly fast, but has a small 256 byte lookup table.
224 149
225 Only choose this option if you know 150 Only choose this option if you know what you are doing.
226 151
227 config CRC32_BIT 152 config CRC32_BIT
228 bool "Classic Algorithm (one bit at a 153 bool "Classic Algorithm (one bit at a time)"
229 help 154 help
230 Calculate checksum one bit at a time 155 Calculate checksum one bit at a time. This is VERY slow, but has
231 no lookup table. This is provided a 156 no lookup table. This is provided as a debugging option.
232 157
233 Only choose this option if you are d 158 Only choose this option if you are debugging crc32.
234 159
235 endchoice 160 endchoice
236 161
237 config CRC64 <<
238 tristate "CRC64 functions" <<
239 help <<
240 This option is provided for the case <<
241 modules require CRC64 functions, but <<
242 the kernel tree does. Such modules t <<
243 functions require M here. <<
244 <<
245 config CRC4 <<
246 tristate "CRC4 functions" <<
247 help <<
248 This option is provided for the case <<
249 modules require CRC4 functions, but <<
250 the kernel tree does. Such modules t <<
251 functions require M here. <<
252 <<
253 config CRC7 162 config CRC7
254 tristate "CRC7 functions" 163 tristate "CRC7 functions"
255 help 164 help
256 This option is provided for the case 165 This option is provided for the case where no in-kernel-tree
257 modules require CRC7 functions, but 166 modules require CRC7 functions, but a module built outside
258 the kernel tree does. Such modules t 167 the kernel tree does. Such modules that use library CRC7
259 functions require M here. 168 functions require M here.
260 169
261 config LIBCRC32C 170 config LIBCRC32C
262 tristate "CRC32c (Castagnoli, et al) C 171 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
263 select CRYPTO 172 select CRYPTO
264 select CRYPTO_CRC32C 173 select CRYPTO_CRC32C
265 help 174 help
266 This option is provided for the case 175 This option is provided for the case where no in-kernel-tree
267 modules require CRC32c functions, bu 176 modules require CRC32c functions, but a module built outside the
268 kernel tree does. Such modules that 177 kernel tree does. Such modules that use library CRC32c functions
269 require M here. See Castagnoli93. 178 require M here. See Castagnoli93.
270 Module will be libcrc32c. 179 Module will be libcrc32c.
271 180
272 config CRC8 181 config CRC8
273 tristate "CRC8 function" 182 tristate "CRC8 function"
274 help 183 help
275 This option provides CRC8 function. 184 This option provides CRC8 function. Drivers may select this
276 when they need to do cyclic redundan 185 when they need to do cyclic redundancy check according CRC8
277 algorithm. Module will be called crc 186 algorithm. Module will be called crc8.
278 187
279 config XXHASH <<
280 tristate <<
281 <<
282 config AUDIT_GENERIC 188 config AUDIT_GENERIC
283 bool 189 bool
284 depends on AUDIT && !AUDIT_ARCH 190 depends on AUDIT && !AUDIT_ARCH
285 default y 191 default y
286 192
287 config AUDIT_ARCH_COMPAT_GENERIC 193 config AUDIT_ARCH_COMPAT_GENERIC
288 bool 194 bool
289 default n 195 default n
290 196
291 config AUDIT_COMPAT_GENERIC 197 config AUDIT_COMPAT_GENERIC
292 bool 198 bool
293 depends on AUDIT_GENERIC && AUDIT_ARCH 199 depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
294 default y 200 default y
295 201
296 config RANDOM32_SELFTEST 202 config RANDOM32_SELFTEST
297 bool "PRNG perform self test on init" 203 bool "PRNG perform self test on init"
>> 204 default n
298 help 205 help
299 This option enables the 32 bit PRNG 206 This option enables the 32 bit PRNG library functions to perform a
300 self test on initialization. 207 self test on initialization.
301 208
302 # 209 #
303 # compression support is select'ed if needed 210 # compression support is select'ed if needed
304 # 211 #
305 config 842_COMPRESS 212 config 842_COMPRESS
306 select CRC32 213 select CRC32
307 tristate 214 tristate
308 215
309 config 842_DECOMPRESS 216 config 842_DECOMPRESS
310 select CRC32 217 select CRC32
311 tristate 218 tristate
312 219
313 config ZLIB_INFLATE 220 config ZLIB_INFLATE
314 tristate 221 tristate
315 222
316 config ZLIB_DEFLATE 223 config ZLIB_DEFLATE
317 tristate 224 tristate
318 select BITREVERSE 225 select BITREVERSE
319 226
320 config ZLIB_DFLTCC <<
321 def_bool y <<
322 depends on S390 <<
323 prompt "Enable s390x DEFLATE CONVERSIO <<
324 help <<
325 Enable s390x hardware support for zli <<
326 <<
327 config LZO_COMPRESS 227 config LZO_COMPRESS
328 tristate 228 tristate
329 229
330 config LZO_DECOMPRESS 230 config LZO_DECOMPRESS
331 tristate 231 tristate
332 232
333 config LZ4_COMPRESS 233 config LZ4_COMPRESS
334 tristate 234 tristate
335 235
336 config LZ4HC_COMPRESS 236 config LZ4HC_COMPRESS
337 tristate 237 tristate
338 238
339 config LZ4_DECOMPRESS 239 config LZ4_DECOMPRESS
340 tristate 240 tristate
341 241
342 config ZSTD_COMMON <<
343 select XXHASH <<
344 tristate <<
345 <<
346 config ZSTD_COMPRESS <<
347 select ZSTD_COMMON <<
348 tristate <<
349 <<
350 config ZSTD_DECOMPRESS <<
351 select ZSTD_COMMON <<
352 tristate <<
353 <<
354 source "lib/xz/Kconfig" 242 source "lib/xz/Kconfig"
355 243
356 # 244 #
357 # These all provide a common interface (hence 245 # These all provide a common interface (hence the apparent duplication with
358 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrap 246 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
359 # 247 #
360 config DECOMPRESS_GZIP 248 config DECOMPRESS_GZIP
361 select ZLIB_INFLATE 249 select ZLIB_INFLATE
362 tristate 250 tristate
363 251
364 config DECOMPRESS_BZIP2 252 config DECOMPRESS_BZIP2
365 tristate 253 tristate
366 254
367 config DECOMPRESS_LZMA 255 config DECOMPRESS_LZMA
368 tristate 256 tristate
369 257
370 config DECOMPRESS_XZ 258 config DECOMPRESS_XZ
371 select XZ_DEC 259 select XZ_DEC
372 tristate 260 tristate
373 261
374 config DECOMPRESS_LZO 262 config DECOMPRESS_LZO
375 select LZO_DECOMPRESS 263 select LZO_DECOMPRESS
376 tristate 264 tristate
377 265
378 config DECOMPRESS_LZ4 266 config DECOMPRESS_LZ4
379 select LZ4_DECOMPRESS 267 select LZ4_DECOMPRESS
380 tristate 268 tristate
381 269
382 config DECOMPRESS_ZSTD <<
383 select ZSTD_DECOMPRESS <<
384 tristate <<
385 <<
386 # 270 #
387 # Generic allocator support is selected if nee 271 # Generic allocator support is selected if needed
388 # 272 #
389 config GENERIC_ALLOCATOR 273 config GENERIC_ALLOCATOR
390 bool 274 bool
391 275
392 # 276 #
393 # reed solomon support is select'ed if needed 277 # reed solomon support is select'ed if needed
394 # 278 #
395 config REED_SOLOMON 279 config REED_SOLOMON
396 tristate 280 tristate
397 281
398 config REED_SOLOMON_ENC8 282 config REED_SOLOMON_ENC8
399 bool 283 bool
400 284
401 config REED_SOLOMON_DEC8 285 config REED_SOLOMON_DEC8
402 bool 286 bool
403 287
404 config REED_SOLOMON_ENC16 288 config REED_SOLOMON_ENC16
405 bool 289 bool
406 290
407 config REED_SOLOMON_DEC16 291 config REED_SOLOMON_DEC16
408 bool 292 bool
409 293
410 # 294 #
411 # BCH support is selected if needed 295 # BCH support is selected if needed
412 # 296 #
413 config BCH 297 config BCH
414 tristate 298 tristate
415 select BITREVERSE <<
416 299
417 config BCH_CONST_PARAMS 300 config BCH_CONST_PARAMS
418 bool 301 bool
419 help 302 help
420 Drivers may select this option to fo 303 Drivers may select this option to force specific constant
421 values for parameters 'm' (Galois fi 304 values for parameters 'm' (Galois field order) and 't'
422 (error correction capability). Those 305 (error correction capability). Those specific values must
423 be set by declaring default values f 306 be set by declaring default values for symbols BCH_CONST_M
424 and BCH_CONST_T. 307 and BCH_CONST_T.
425 Doing so will enable extra compiler 308 Doing so will enable extra compiler optimizations,
426 improving encoding and decoding perf 309 improving encoding and decoding performance up to 2x for
427 usual (m,t) values (typically such t 310 usual (m,t) values (typically such that m*t < 200).
428 When this option is selected, the BC 311 When this option is selected, the BCH library supports
429 only a single (m,t) configuration. T 312 only a single (m,t) configuration. This is mainly useful
430 for NAND flash board drivers requiri 313 for NAND flash board drivers requiring known, fixed BCH
431 parameters. 314 parameters.
432 315
433 config BCH_CONST_M 316 config BCH_CONST_M
434 int 317 int
435 range 5 15 318 range 5 15
436 help 319 help
437 Constant value for Galois field orde 320 Constant value for Galois field order 'm'. If 'k' is the
438 number of data bits to protect, 'm' 321 number of data bits to protect, 'm' should be chosen such
439 that (k + m*t) <= 2**m - 1. 322 that (k + m*t) <= 2**m - 1.
440 Drivers should declare a default val 323 Drivers should declare a default value for this symbol if
441 they select option BCH_CONST_PARAMS. 324 they select option BCH_CONST_PARAMS.
442 325
443 config BCH_CONST_T 326 config BCH_CONST_T
444 int 327 int
445 help 328 help
446 Constant value for error correction 329 Constant value for error correction capability in bits 't'.
447 Drivers should declare a default val 330 Drivers should declare a default value for this symbol if
448 they select option BCH_CONST_PARAMS. 331 they select option BCH_CONST_PARAMS.
449 332
450 # 333 #
451 # Textsearch support is select'ed if needed 334 # Textsearch support is select'ed if needed
452 # 335 #
453 config TEXTSEARCH 336 config TEXTSEARCH
454 bool 337 bool
455 338
456 config TEXTSEARCH_KMP 339 config TEXTSEARCH_KMP
457 tristate 340 tristate
458 341
459 config TEXTSEARCH_BM 342 config TEXTSEARCH_BM
460 tristate 343 tristate
461 344
462 config TEXTSEARCH_FSM 345 config TEXTSEARCH_FSM
463 tristate 346 tristate
464 347
465 config BTREE 348 config BTREE
466 bool 349 bool
467 350
468 config INTERVAL_TREE 351 config INTERVAL_TREE
469 bool 352 bool
470 help 353 help
471 Simple, embeddable, interval-tree. C 354 Simple, embeddable, interval-tree. Can find the start of an
472 overlapping range in log(n) time and 355 overlapping range in log(n) time and then iterate over all
473 overlapping nodes. The algorithm is 356 overlapping nodes. The algorithm is implemented as an
474 augmented rbtree. 357 augmented rbtree.
475 358
476 See: 359 See:
477 360
478 Documentation/core-api/rbtree. !! 361 Documentation/rbtree.txt
479 362
480 for more information. 363 for more information.
481 364
482 config INTERVAL_TREE_SPAN_ITER <<
483 bool <<
484 depends on INTERVAL_TREE <<
485 <<
486 config XARRAY_MULTI <<
487 bool <<
488 help <<
489 Support entries which occupy multipl <<
490 XArray. <<
491 <<
492 config ASSOCIATIVE_ARRAY 365 config ASSOCIATIVE_ARRAY
493 bool 366 bool
494 help 367 help
495 Generic associative array. Can be s 368 Generic associative array. Can be searched and iterated over whilst
496 it is being modified. It is also re 369 it is being modified. It is also reasonably quick to search and
497 modify. The algorithms are non-recu 370 modify. The algorithms are non-recursive, and the trees are highly
498 capacious. 371 capacious.
499 372
500 See: 373 See:
501 374
502 Documentation/core-api/assoc_a !! 375 Documentation/assoc_array.txt
503 376
504 for more information. 377 for more information.
505 378
506 config CLOSURES <<
507 bool <<
508 <<
509 config HAS_IOMEM 379 config HAS_IOMEM
510 bool 380 bool
511 depends on !NO_IOMEM 381 depends on !NO_IOMEM
>> 382 select GENERIC_IO
512 default y 383 default y
513 384
514 config HAS_IOPORT <<
515 bool <<
516 <<
517 config HAS_IOPORT_MAP 385 config HAS_IOPORT_MAP
518 bool 386 bool
519 depends on HAS_IOMEM && !NO_IOPORT_MAP 387 depends on HAS_IOMEM && !NO_IOPORT_MAP
520 default y 388 default y
521 389
522 source "kernel/dma/Kconfig" !! 390 config HAS_DMA
523 <<
524 config SGL_ALLOC <<
525 bool <<
526 default n <<
527 <<
528 config IOMMU_HELPER <<
529 bool 391 bool
>> 392 depends on !NO_DMA
>> 393 default y
530 394
531 config CHECK_SIGNATURE 395 config CHECK_SIGNATURE
532 bool 396 bool
533 397
534 config CPUMASK_OFFSTACK 398 config CPUMASK_OFFSTACK
535 bool "Force CPU masks off stack" if DE 399 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
536 help 400 help
537 Use dynamic allocation for cpumask_v 401 Use dynamic allocation for cpumask_var_t, instead of putting
538 them on the stack. This is a bit mo 402 them on the stack. This is a bit more expensive, but avoids
539 stack overflow. 403 stack overflow.
540 404
541 config FORCE_NR_CPUS <<
542 def_bool !SMP <<
543 <<
544 config CPU_RMAP 405 config CPU_RMAP
545 bool 406 bool
546 depends on SMP 407 depends on SMP
547 408
548 config DQL 409 config DQL
549 bool 410 bool
550 411
551 config GLOB 412 config GLOB
552 bool 413 bool
553 # This actually supports modular compila 414 # This actually supports modular compilation, but the module overhead
554 # is ridiculous for the amount of code i 415 # is ridiculous for the amount of code involved. Until an out-of-tree
555 # driver asks for it, we'll just link it 416 # driver asks for it, we'll just link it directly it into the kernel
556 # when required. Since we're ignoring o 417 # when required. Since we're ignoring out-of-tree users, there's also
557 # no need bother prompting for a manual 418 # no need bother prompting for a manual decision:
558 # prompt "glob_match() function" 419 # prompt "glob_match() function"
559 help 420 help
560 This option provides a glob_match fu 421 This option provides a glob_match function for performing
561 simple text pattern matching. It or 422 simple text pattern matching. It originated in the ATA code
562 to blacklist particular drive models 423 to blacklist particular drive models, but other device drivers
563 may need similar functionality. 424 may need similar functionality.
564 425
565 All drivers in the Linux kernel tree 426 All drivers in the Linux kernel tree that require this function
566 should automatically select this opt 427 should automatically select this option. Say N unless you
567 are compiling an out-of tree driver 428 are compiling an out-of tree driver which tells you that it
568 depends on this. 429 depends on this.
569 430
570 config GLOB_SELFTEST 431 config GLOB_SELFTEST
571 tristate "glob self-test on init" !! 432 bool "glob self-test on init"
>> 433 default n
572 depends on GLOB 434 depends on GLOB
573 help 435 help
574 This option enables a simple self-te 436 This option enables a simple self-test of the glob_match
575 function on startup. It is primaril 437 function on startup. It is primarily useful for people
576 working on the code to ensure they h 438 working on the code to ensure they haven't introduced any
577 regressions. 439 regressions.
578 440
579 It only adds a little bit of code an 441 It only adds a little bit of code and slows kernel boot (or
580 module load) by a small amount, so y 442 module load) by a small amount, so you're welcome to play with
581 it, but you probably don't need it. 443 it, but you probably don't need it.
582 444
583 # 445 #
584 # Netlink attribute parsing support is select' 446 # Netlink attribute parsing support is select'ed if needed
585 # 447 #
586 config NLATTR 448 config NLATTR
587 bool 449 bool
588 450
589 # 451 #
590 # Generic 64-bit atomic support is selected if 452 # Generic 64-bit atomic support is selected if needed
591 # 453 #
592 config GENERIC_ATOMIC64 454 config GENERIC_ATOMIC64
593 bool 455 bool
594 456
>> 457 config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
>> 458 def_bool y if GENERIC_ATOMIC64
>> 459
595 config LRU_CACHE 460 config LRU_CACHE
596 tristate 461 tristate
597 462
598 config CLZ_TAB 463 config CLZ_TAB
599 bool 464 bool
600 465
601 config IRQ_POLL !! 466 config CORDIC
602 bool "IRQ polling library" !! 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"
603 help 474 help
604 Helper library to poll interrupt mit !! 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.
605 479
606 config MPILIB 480 config MPILIB
607 tristate 481 tristate
608 select CLZ_TAB 482 select CLZ_TAB
609 help 483 help
610 Multiprecision maths library from Gn 484 Multiprecision maths library from GnuPG.
611 It is used to implement RSA digital 485 It is used to implement RSA digital signature verification,
612 which is used by IMA/EVM digital sig 486 which is used by IMA/EVM digital signature extension.
613 487
614 config SIGNATURE 488 config SIGNATURE
615 tristate 489 tristate
616 depends on KEYS 490 depends on KEYS
617 select CRYPTO 491 select CRYPTO
618 select CRYPTO_SHA1 492 select CRYPTO_SHA1
619 select MPILIB 493 select MPILIB
620 help 494 help
621 Digital signature verification. Curr 495 Digital signature verification. Currently only RSA is supported.
622 Implementation is done using GnuPG M 496 Implementation is done using GnuPG MPI library
623 497
624 config DIMLIB <<
625 tristate <<
626 depends on NET <<
627 help <<
628 Dynamic Interrupt Moderation library <<
629 Implements an algorithm for dynamica <<
630 according to run time performance. <<
631 <<
632 # 498 #
633 # libfdt files, only selected if needed. 499 # libfdt files, only selected if needed.
634 # 500 #
635 config LIBFDT 501 config LIBFDT
636 bool 502 bool
637 503
638 config OID_REGISTRY 504 config OID_REGISTRY
639 tristate 505 tristate
640 help 506 help
641 Enable fast lookup object identifier 507 Enable fast lookup object identifier registry.
642 508
643 config UCS2_STRING 509 config UCS2_STRING
644 tristate !! 510 tristate
645 <<
646 # <<
647 # generic vdso <<
648 # <<
649 source "lib/vdso/Kconfig" <<
650 511
651 source "lib/fonts/Kconfig" 512 source "lib/fonts/Kconfig"
652 513
653 config SG_SPLIT 514 config SG_SPLIT
654 def_bool n 515 def_bool n
655 help 516 help
656 Provides a helper to split scatterlis !! 517 Provides a heler to split scatterlists into chunks, each chunk being a
657 a scatterlist. This should be selecte !! 518 scatterlist. This should be selected by a driver or an API which
658 whishes to split a scatterlist amongs !! 519 whishes to split a scatterlist amongst multiple DMA channel.
659 <<
660 config SG_POOL <<
661 def_bool n <<
662 help <<
663 Provides a helper to allocate chained <<
664 selected by a driver or an API which <<
665 scatterlist. <<
666 520
667 # 521 #
668 # sg chaining option 522 # sg chaining option
669 # 523 #
670 524
671 config ARCH_NO_SG_CHAIN !! 525 config ARCH_HAS_SG_CHAIN
672 def_bool n 526 def_bool n
673 527
674 config ARCH_HAS_PMEM_API 528 config ARCH_HAS_PMEM_API
675 bool 529 bool
676 530
677 config MEMREGION !! 531 config ARCH_HAS_MMIO_FLUSH
678 bool <<
679 <<
680 config ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION <<
681 bool <<
682 <<
683 config ARCH_HAS_MEMREMAP_COMPAT_ALIGN <<
684 bool <<
685 <<
686 # use memcpy to implement user copies for nomm <<
687 config UACCESS_MEMCPY <<
688 bool <<
689 <<
690 config ARCH_HAS_UACCESS_FLUSHCACHE <<
691 bool <<
692 <<
693 # arch has a concept of a recoverable synchron <<
694 # memory-read error like x86 machine-check or <<
695 # implements copy_mc_to_{user,kernel} to abort <<
696 # 'bytes-transferred' if that exception fires <<
697 # buffer. <<
698 config ARCH_HAS_COPY_MC <<
699 bool <<
700 <<
701 # Temporary. Goes away when all archs are clea <<
702 config ARCH_STACKWALK <<
703 bool <<
704 <<
705 config STACKDEPOT <<
706 bool <<
707 select STACKTRACE <<
708 help <<
709 Stack depot: stack trace storage tha <<
710 <<
711 config STACKDEPOT_ALWAYS_INIT <<
712 bool 532 bool
713 select STACKDEPOT <<
714 help <<
715 Always initialize stack depot during <<
716 <<
717 config STACKDEPOT_MAX_FRAMES <<
718 int "Maximum number of frames in trace <<
719 range 1 256 <<
720 default 64 <<
721 depends on STACKDEPOT <<
722 <<
723 config REF_TRACKER <<
724 bool <<
725 depends on STACKTRACE_SUPPORT <<
726 select STACKDEPOT <<
727 <<
728 config SBITMAP <<
729 bool <<
730 <<
731 config PARMAN <<
732 tristate "parman" if COMPILE_TEST <<
733 <<
734 config OBJAGG <<
735 tristate "objagg" if COMPILE_TEST <<
736 <<
737 config LWQ_TEST <<
738 bool "Boot-time test for lwq queuing" <<
739 help <<
740 Run boot-time test of light-weight q <<
741 533
742 endmenu 534 endmenu
743 <<
744 config GENERIC_IOREMAP <<
745 bool <<
746 <<
747 config GENERIC_LIB_ASHLDI3 <<
748 bool <<
749 <<
750 config GENERIC_LIB_ASHRDI3 <<
751 bool <<
752 <<
753 config GENERIC_LIB_LSHRDI3 <<
754 bool <<
755 <<
756 config GENERIC_LIB_MULDI3 <<
757 bool <<
758 <<
759 config GENERIC_LIB_CMPDI2 <<
760 bool <<
761 <<
762 config GENERIC_LIB_UCMPDI2 <<
763 bool <<
764 <<
765 config GENERIC_LIB_DEVMEM_IS_ALLOWED <<
766 bool <<
767 <<
768 config PLDMFW <<
769 bool <<
770 default n <<
771 <<
772 config ASN1_ENCODER <<
773 tristate <<
774 <<
775 config POLYNOMIAL <<
776 tristate <<
777 <<
778 config FIRMWARE_TABLE <<
779 bool <<
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.