1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 # 2 #
3 # Library configuration 3 # Library configuration
4 # 4 #
5 5
6 config BINARY_PRINTF 6 config BINARY_PRINTF
7 def_bool n 7 def_bool n
8 8
9 menu "Library routines" 9 menu "Library routines"
10 10
11 config RAID6_PQ 11 config RAID6_PQ
12 tristate 12 tristate
13 13
14 config RAID6_PQ_BENCHMARK 14 config RAID6_PQ_BENCHMARK
15 bool "Automatically choose fastest RAI 15 bool "Automatically choose fastest RAID6 PQ functions"
16 depends on RAID6_PQ 16 depends on RAID6_PQ
17 default y 17 default y
18 help 18 help
19 Benchmark all available RAID6 PQ fun 19 Benchmark all available RAID6 PQ functions on init and choose the
20 fastest one. 20 fastest one.
21 21
22 config LINEAR_RANGES <<
23 tristate <<
24 <<
25 config PACKING 22 config PACKING
26 bool "Generic bitfield packing and unp 23 bool "Generic bitfield packing and unpacking"
27 select BITREVERSE <<
28 default n 24 default n
29 help 25 help
30 This option provides the packing() h 26 This option provides the packing() helper function, which permits
31 converting bitfields between a CPU-u 27 converting bitfields between a CPU-usable representation and a
32 memory representation that can have 28 memory representation that can have any combination of these quirks:
33 - Is little endian (bytes are reve 29 - Is little endian (bytes are reversed within a 32-bit group)
34 - The least-significant 32-bit wor 30 - The least-significant 32-bit word comes first (within a 64-bit
35 group) 31 group)
36 - The most significant bit of a by 32 - The most significant bit of a byte is at its right (bit 0 of a
37 register description is numerica 33 register description is numerically 2^7).
38 Drivers may use these helpers to mat 34 Drivers may use these helpers to match the bit indices as described
39 in the data sheets of the peripheral 35 in the data sheets of the peripherals they are in control of.
40 36
41 When in doubt, say N. 37 When in doubt, say N.
42 38
43 config BITREVERSE 39 config BITREVERSE
44 tristate 40 tristate
45 41
46 config HAVE_ARCH_BITREVERSE 42 config HAVE_ARCH_BITREVERSE
47 bool 43 bool
48 default n 44 default n
>> 45 depends on BITREVERSE
49 help 46 help
50 This option enables the use of hardw 47 This option enables the use of hardware bit-reversal instructions on
51 architectures which support such ope 48 architectures which support such operations.
52 49
53 config ARCH_HAS_STRNCPY_FROM_USER <<
54 bool <<
55 <<
56 config ARCH_HAS_STRNLEN_USER <<
57 bool <<
58 <<
59 config GENERIC_STRNCPY_FROM_USER 50 config GENERIC_STRNCPY_FROM_USER
60 def_bool !ARCH_HAS_STRNCPY_FROM_USER !! 51 bool
61 52
62 config GENERIC_STRNLEN_USER 53 config GENERIC_STRNLEN_USER
63 def_bool !ARCH_HAS_STRNLEN_USER !! 54 bool
64 55
65 config GENERIC_NET_UTILS 56 config GENERIC_NET_UTILS
66 bool 57 bool
67 58
>> 59 config GENERIC_FIND_FIRST_BIT
>> 60 bool
>> 61
68 source "lib/math/Kconfig" 62 source "lib/math/Kconfig"
69 63
70 config NO_GENERIC_PCI_IOPORT_MAP 64 config NO_GENERIC_PCI_IOPORT_MAP
71 bool 65 bool
72 66
>> 67 config GENERIC_PCI_IOMAP
>> 68 bool
>> 69
73 config GENERIC_IOMAP 70 config GENERIC_IOMAP
74 bool 71 bool
75 select GENERIC_PCI_IOMAP 72 select GENERIC_PCI_IOMAP
76 73
77 config STMP_DEVICE 74 config STMP_DEVICE
78 bool 75 bool
79 76
80 config ARCH_USE_CMPXCHG_LOCKREF 77 config ARCH_USE_CMPXCHG_LOCKREF
81 bool 78 bool
82 79
83 config ARCH_HAS_FAST_MULTIPLIER 80 config ARCH_HAS_FAST_MULTIPLIER
84 bool 81 bool
85 82
86 config ARCH_USE_SYM_ANNOTATIONS <<
87 bool <<
88 <<
89 config INDIRECT_PIO 83 config INDIRECT_PIO
90 bool "Access I/O in non-MMIO mode" 84 bool "Access I/O in non-MMIO mode"
91 depends on ARM64 85 depends on ARM64
92 depends on HAS_IOPORT <<
93 help 86 help
94 On some platforms where no separate 87 On some platforms where no separate I/O space exists, there are I/O
95 hosts which can not be accessed in M 88 hosts which can not be accessed in MMIO mode. Using the logical PIO
96 mechanism, the host-local I/O resour 89 mechanism, the host-local I/O resource can be mapped into system
97 logic PIO space shared with MMIO hos 90 logic PIO space shared with MMIO hosts, such as PCI/PCIe, then the
98 system can access the I/O devices wi 91 system can access the I/O devices with the mapped-logic PIO through
99 I/O accessors. 92 I/O accessors.
100 93
101 This way has relatively little I/O p 94 This way has relatively little I/O performance cost. Please make
102 sure your devices really need this c 95 sure your devices really need this configure item enabled.
103 96
104 When in doubt, say N. 97 When in doubt, say N.
105 98
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 99 config CRC_CCITT
130 tristate "CRC-CCITT functions" 100 tristate "CRC-CCITT functions"
131 help 101 help
132 This option is provided for the case 102 This option is provided for the case where no in-kernel-tree
133 modules require CRC-CCITT functions, 103 modules require CRC-CCITT functions, but a module built outside
134 the kernel tree does. Such modules t 104 the kernel tree does. Such modules that use library CRC-CCITT
135 functions require M here. 105 functions require M here.
136 106
137 config CRC16 107 config CRC16
138 tristate "CRC16 functions" 108 tristate "CRC16 functions"
139 help 109 help
140 This option is provided for the case 110 This option is provided for the case where no in-kernel-tree
141 modules require CRC16 functions, but 111 modules require CRC16 functions, but a module built outside
142 the kernel tree does. Such modules t 112 the kernel tree does. Such modules that use library CRC16
143 functions require M here. 113 functions require M here.
144 114
145 config CRC_T10DIF 115 config CRC_T10DIF
146 tristate "CRC calculation for the T10 116 tristate "CRC calculation for the T10 Data Integrity Field"
147 select CRYPTO 117 select CRYPTO
148 select CRYPTO_CRCT10DIF 118 select CRYPTO_CRCT10DIF
149 help 119 help
150 This option is only needed if a modu 120 This option is only needed if a module that's not in the
151 kernel tree needs to calculate CRC c 121 kernel tree needs to calculate CRC checks for use with the
152 SCSI data integrity subsystem. 122 SCSI data integrity subsystem.
153 123
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 124 config CRC_ITU_T
164 tristate "CRC ITU-T V.41 functions" 125 tristate "CRC ITU-T V.41 functions"
165 help 126 help
166 This option is provided for the case 127 This option is provided for the case where no in-kernel-tree
167 modules require CRC ITU-T V.41 funct 128 modules require CRC ITU-T V.41 functions, but a module built outside
168 the kernel tree does. Such modules t 129 the kernel tree does. Such modules that use library CRC ITU-T V.41
169 functions require M here. 130 functions require M here.
170 131
171 config CRC32 132 config CRC32
172 tristate "CRC32/CRC32c functions" 133 tristate "CRC32/CRC32c functions"
173 default y 134 default y
174 select BITREVERSE 135 select BITREVERSE
175 help 136 help
176 This option is provided for the case 137 This option is provided for the case where no in-kernel-tree
177 modules require CRC32/CRC32c functio 138 modules require CRC32/CRC32c functions, but a module built outside
178 the kernel tree does. Such modules t 139 the kernel tree does. Such modules that use library CRC32/CRC32c
179 functions require M here. 140 functions require M here.
180 141
181 config CRC32_SELFTEST 142 config CRC32_SELFTEST
182 tristate "CRC32 perform self test on i 143 tristate "CRC32 perform self test on init"
183 depends on CRC32 144 depends on CRC32
184 help 145 help
185 This option enables the CRC32 librar 146 This option enables the CRC32 library functions to perform a
186 self test on initialization. The sel 147 self test on initialization. The self test computes crc32_le
187 and crc32_be over byte strings with 148 and crc32_be over byte strings with random alignment and length
188 and computes the total elapsed time 149 and computes the total elapsed time and number of bytes processed.
189 150
190 choice 151 choice
191 prompt "CRC32 implementation" 152 prompt "CRC32 implementation"
192 depends on CRC32 153 depends on CRC32
193 default CRC32_SLICEBY8 154 default CRC32_SLICEBY8
194 help 155 help
195 This option allows a kernel builder 156 This option allows a kernel builder to override the default choice
196 of CRC32 algorithm. Choose the defa 157 of CRC32 algorithm. Choose the default ("slice by 8") unless you
197 know that you need one of the others 158 know that you need one of the others.
198 159
199 config CRC32_SLICEBY8 160 config CRC32_SLICEBY8
200 bool "Slice by 8 bytes" 161 bool "Slice by 8 bytes"
201 help 162 help
202 Calculate checksum 8 bytes at a time 163 Calculate checksum 8 bytes at a time with a clever slicing algorithm.
203 This is the fastest algorithm, but c 164 This is the fastest algorithm, but comes with a 8KiB lookup table.
204 Most modern processors have enough c 165 Most modern processors have enough cache to hold this table without
205 thrashing the cache. 166 thrashing the cache.
206 167
207 This is the default implementation c 168 This is the default implementation choice. Choose this one unless
208 you have a good reason not to. 169 you have a good reason not to.
209 170
210 config CRC32_SLICEBY4 171 config CRC32_SLICEBY4
211 bool "Slice by 4 bytes" 172 bool "Slice by 4 bytes"
212 help 173 help
213 Calculate checksum 4 bytes at a time 174 Calculate checksum 4 bytes at a time with a clever slicing algorithm.
214 This is a bit slower than slice by 8 175 This is a bit slower than slice by 8, but has a smaller 4KiB lookup
215 table. 176 table.
216 177
217 Only choose this option if you know 178 Only choose this option if you know what you are doing.
218 179
219 config CRC32_SARWATE 180 config CRC32_SARWATE
220 bool "Sarwate's Algorithm (one byte at 181 bool "Sarwate's Algorithm (one byte at a time)"
221 help 182 help
222 Calculate checksum a byte at a time 183 Calculate checksum a byte at a time using Sarwate's algorithm. This
223 is not particularly fast, but has a 184 is not particularly fast, but has a small 256 byte lookup table.
224 185
225 Only choose this option if you know 186 Only choose this option if you know what you are doing.
226 187
227 config CRC32_BIT 188 config CRC32_BIT
228 bool "Classic Algorithm (one bit at a 189 bool "Classic Algorithm (one bit at a time)"
229 help 190 help
230 Calculate checksum one bit at a time 191 Calculate checksum one bit at a time. This is VERY slow, but has
231 no lookup table. This is provided a 192 no lookup table. This is provided as a debugging option.
232 193
233 Only choose this option if you are d 194 Only choose this option if you are debugging crc32.
234 195
235 endchoice 196 endchoice
236 197
237 config CRC64 198 config CRC64
238 tristate "CRC64 functions" 199 tristate "CRC64 functions"
239 help 200 help
240 This option is provided for the case 201 This option is provided for the case where no in-kernel-tree
241 modules require CRC64 functions, but 202 modules require CRC64 functions, but a module built outside
242 the kernel tree does. Such modules t 203 the kernel tree does. Such modules that use library CRC64
243 functions require M here. 204 functions require M here.
244 205
245 config CRC4 206 config CRC4
246 tristate "CRC4 functions" 207 tristate "CRC4 functions"
247 help 208 help
248 This option is provided for the case 209 This option is provided for the case where no in-kernel-tree
249 modules require CRC4 functions, but 210 modules require CRC4 functions, but a module built outside
250 the kernel tree does. Such modules t 211 the kernel tree does. Such modules that use library CRC4
251 functions require M here. 212 functions require M here.
252 213
253 config CRC7 214 config CRC7
254 tristate "CRC7 functions" 215 tristate "CRC7 functions"
255 help 216 help
256 This option is provided for the case 217 This option is provided for the case where no in-kernel-tree
257 modules require CRC7 functions, but 218 modules require CRC7 functions, but a module built outside
258 the kernel tree does. Such modules t 219 the kernel tree does. Such modules that use library CRC7
259 functions require M here. 220 functions require M here.
260 221
261 config LIBCRC32C 222 config LIBCRC32C
262 tristate "CRC32c (Castagnoli, et al) C 223 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
263 select CRYPTO 224 select CRYPTO
264 select CRYPTO_CRC32C 225 select CRYPTO_CRC32C
265 help 226 help
266 This option is provided for the case 227 This option is provided for the case where no in-kernel-tree
267 modules require CRC32c functions, bu 228 modules require CRC32c functions, but a module built outside the
268 kernel tree does. Such modules that 229 kernel tree does. Such modules that use library CRC32c functions
269 require M here. See Castagnoli93. 230 require M here. See Castagnoli93.
270 Module will be libcrc32c. 231 Module will be libcrc32c.
271 232
272 config CRC8 233 config CRC8
273 tristate "CRC8 function" 234 tristate "CRC8 function"
274 help 235 help
275 This option provides CRC8 function. 236 This option provides CRC8 function. Drivers may select this
276 when they need to do cyclic redundan 237 when they need to do cyclic redundancy check according CRC8
277 algorithm. Module will be called crc 238 algorithm. Module will be called crc8.
278 239
279 config XXHASH 240 config XXHASH
280 tristate 241 tristate
281 242
282 config AUDIT_GENERIC 243 config AUDIT_GENERIC
283 bool 244 bool
284 depends on AUDIT && !AUDIT_ARCH 245 depends on AUDIT && !AUDIT_ARCH
285 default y 246 default y
286 247
287 config AUDIT_ARCH_COMPAT_GENERIC 248 config AUDIT_ARCH_COMPAT_GENERIC
288 bool 249 bool
289 default n 250 default n
290 251
291 config AUDIT_COMPAT_GENERIC 252 config AUDIT_COMPAT_GENERIC
292 bool 253 bool
293 depends on AUDIT_GENERIC && AUDIT_ARCH 254 depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
294 default y 255 default y
295 256
296 config RANDOM32_SELFTEST 257 config RANDOM32_SELFTEST
297 bool "PRNG perform self test on init" 258 bool "PRNG perform self test on init"
298 help 259 help
299 This option enables the 32 bit PRNG 260 This option enables the 32 bit PRNG library functions to perform a
300 self test on initialization. 261 self test on initialization.
301 262
302 # 263 #
303 # compression support is select'ed if needed 264 # compression support is select'ed if needed
304 # 265 #
305 config 842_COMPRESS 266 config 842_COMPRESS
306 select CRC32 267 select CRC32
307 tristate 268 tristate
308 269
309 config 842_DECOMPRESS 270 config 842_DECOMPRESS
310 select CRC32 271 select CRC32
311 tristate 272 tristate
312 273
313 config ZLIB_INFLATE 274 config ZLIB_INFLATE
314 tristate 275 tristate
315 276
316 config ZLIB_DEFLATE 277 config ZLIB_DEFLATE
317 tristate 278 tristate
318 select BITREVERSE 279 select BITREVERSE
319 280
320 config ZLIB_DFLTCC 281 config ZLIB_DFLTCC
321 def_bool y 282 def_bool y
322 depends on S390 283 depends on S390
323 prompt "Enable s390x DEFLATE CONVERSIO 284 prompt "Enable s390x DEFLATE CONVERSION CALL support for kernel zlib"
324 help 285 help
325 Enable s390x hardware support for zli 286 Enable s390x hardware support for zlib in the kernel.
326 287
327 config LZO_COMPRESS 288 config LZO_COMPRESS
328 tristate 289 tristate
329 290
330 config LZO_DECOMPRESS 291 config LZO_DECOMPRESS
331 tristate 292 tristate
332 293
333 config LZ4_COMPRESS 294 config LZ4_COMPRESS
334 tristate 295 tristate
335 296
336 config LZ4HC_COMPRESS 297 config LZ4HC_COMPRESS
337 tristate 298 tristate
338 299
339 config LZ4_DECOMPRESS 300 config LZ4_DECOMPRESS
340 tristate 301 tristate
341 302
342 config ZSTD_COMMON <<
343 select XXHASH <<
344 tristate <<
345 <<
346 config ZSTD_COMPRESS 303 config ZSTD_COMPRESS
347 select ZSTD_COMMON !! 304 select XXHASH
348 tristate 305 tristate
349 306
350 config ZSTD_DECOMPRESS 307 config ZSTD_DECOMPRESS
351 select ZSTD_COMMON !! 308 select XXHASH
352 tristate 309 tristate
353 310
354 source "lib/xz/Kconfig" 311 source "lib/xz/Kconfig"
355 312
356 # 313 #
357 # These all provide a common interface (hence 314 # These all provide a common interface (hence the apparent duplication with
358 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrap 315 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
359 # 316 #
360 config DECOMPRESS_GZIP 317 config DECOMPRESS_GZIP
361 select ZLIB_INFLATE 318 select ZLIB_INFLATE
362 tristate 319 tristate
363 320
364 config DECOMPRESS_BZIP2 321 config DECOMPRESS_BZIP2
365 tristate 322 tristate
366 323
367 config DECOMPRESS_LZMA 324 config DECOMPRESS_LZMA
368 tristate 325 tristate
369 326
370 config DECOMPRESS_XZ 327 config DECOMPRESS_XZ
371 select XZ_DEC 328 select XZ_DEC
372 tristate 329 tristate
373 330
374 config DECOMPRESS_LZO 331 config DECOMPRESS_LZO
375 select LZO_DECOMPRESS 332 select LZO_DECOMPRESS
376 tristate 333 tristate
377 334
378 config DECOMPRESS_LZ4 335 config DECOMPRESS_LZ4
379 select LZ4_DECOMPRESS 336 select LZ4_DECOMPRESS
380 tristate 337 tristate
381 338
382 config DECOMPRESS_ZSTD <<
383 select ZSTD_DECOMPRESS <<
384 tristate <<
385 <<
386 # 339 #
387 # Generic allocator support is selected if nee 340 # Generic allocator support is selected if needed
388 # 341 #
389 config GENERIC_ALLOCATOR 342 config GENERIC_ALLOCATOR
390 bool 343 bool
391 344
392 # 345 #
393 # reed solomon support is select'ed if needed 346 # reed solomon support is select'ed if needed
394 # 347 #
395 config REED_SOLOMON 348 config REED_SOLOMON
396 tristate 349 tristate
397 350
398 config REED_SOLOMON_ENC8 351 config REED_SOLOMON_ENC8
399 bool 352 bool
400 353
401 config REED_SOLOMON_DEC8 354 config REED_SOLOMON_DEC8
402 bool 355 bool
403 356
404 config REED_SOLOMON_ENC16 357 config REED_SOLOMON_ENC16
405 bool 358 bool
406 359
407 config REED_SOLOMON_DEC16 360 config REED_SOLOMON_DEC16
408 bool 361 bool
409 362
410 # 363 #
411 # BCH support is selected if needed 364 # BCH support is selected if needed
412 # 365 #
413 config BCH 366 config BCH
414 tristate 367 tristate
415 select BITREVERSE <<
416 368
417 config BCH_CONST_PARAMS 369 config BCH_CONST_PARAMS
418 bool 370 bool
419 help 371 help
420 Drivers may select this option to fo 372 Drivers may select this option to force specific constant
421 values for parameters 'm' (Galois fi 373 values for parameters 'm' (Galois field order) and 't'
422 (error correction capability). Those 374 (error correction capability). Those specific values must
423 be set by declaring default values f 375 be set by declaring default values for symbols BCH_CONST_M
424 and BCH_CONST_T. 376 and BCH_CONST_T.
425 Doing so will enable extra compiler 377 Doing so will enable extra compiler optimizations,
426 improving encoding and decoding perf 378 improving encoding and decoding performance up to 2x for
427 usual (m,t) values (typically such t 379 usual (m,t) values (typically such that m*t < 200).
428 When this option is selected, the BC 380 When this option is selected, the BCH library supports
429 only a single (m,t) configuration. T 381 only a single (m,t) configuration. This is mainly useful
430 for NAND flash board drivers requiri 382 for NAND flash board drivers requiring known, fixed BCH
431 parameters. 383 parameters.
432 384
433 config BCH_CONST_M 385 config BCH_CONST_M
434 int 386 int
435 range 5 15 387 range 5 15
436 help 388 help
437 Constant value for Galois field orde 389 Constant value for Galois field order 'm'. If 'k' is the
438 number of data bits to protect, 'm' 390 number of data bits to protect, 'm' should be chosen such
439 that (k + m*t) <= 2**m - 1. 391 that (k + m*t) <= 2**m - 1.
440 Drivers should declare a default val 392 Drivers should declare a default value for this symbol if
441 they select option BCH_CONST_PARAMS. 393 they select option BCH_CONST_PARAMS.
442 394
443 config BCH_CONST_T 395 config BCH_CONST_T
444 int 396 int
445 help 397 help
446 Constant value for error correction 398 Constant value for error correction capability in bits 't'.
447 Drivers should declare a default val 399 Drivers should declare a default value for this symbol if
448 they select option BCH_CONST_PARAMS. 400 they select option BCH_CONST_PARAMS.
449 401
450 # 402 #
451 # Textsearch support is select'ed if needed 403 # Textsearch support is select'ed if needed
452 # 404 #
453 config TEXTSEARCH 405 config TEXTSEARCH
454 bool 406 bool
455 407
456 config TEXTSEARCH_KMP 408 config TEXTSEARCH_KMP
457 tristate 409 tristate
458 410
459 config TEXTSEARCH_BM 411 config TEXTSEARCH_BM
460 tristate 412 tristate
461 413
462 config TEXTSEARCH_FSM 414 config TEXTSEARCH_FSM
463 tristate 415 tristate
464 416
465 config BTREE 417 config BTREE
466 bool 418 bool
467 419
468 config INTERVAL_TREE 420 config INTERVAL_TREE
469 bool 421 bool
470 help 422 help
471 Simple, embeddable, interval-tree. C 423 Simple, embeddable, interval-tree. Can find the start of an
472 overlapping range in log(n) time and 424 overlapping range in log(n) time and then iterate over all
473 overlapping nodes. The algorithm is 425 overlapping nodes. The algorithm is implemented as an
474 augmented rbtree. 426 augmented rbtree.
475 427
476 See: 428 See:
477 429
478 Documentation/core-api/rbtree. !! 430 Documentation/rbtree.txt
479 431
480 for more information. 432 for more information.
481 433
482 config INTERVAL_TREE_SPAN_ITER <<
483 bool <<
484 depends on INTERVAL_TREE <<
485 <<
486 config XARRAY_MULTI 434 config XARRAY_MULTI
487 bool 435 bool
488 help 436 help
489 Support entries which occupy multipl 437 Support entries which occupy multiple consecutive indices in the
490 XArray. 438 XArray.
491 439
492 config ASSOCIATIVE_ARRAY 440 config ASSOCIATIVE_ARRAY
493 bool 441 bool
494 help 442 help
495 Generic associative array. Can be s 443 Generic associative array. Can be searched and iterated over whilst
496 it is being modified. It is also re 444 it is being modified. It is also reasonably quick to search and
497 modify. The algorithms are non-recu 445 modify. The algorithms are non-recursive, and the trees are highly
498 capacious. 446 capacious.
499 447
500 See: 448 See:
501 449
502 Documentation/core-api/assoc_a 450 Documentation/core-api/assoc_array.rst
503 451
504 for more information. 452 for more information.
505 453
506 config CLOSURES <<
507 bool <<
508 <<
509 config HAS_IOMEM 454 config HAS_IOMEM
510 bool 455 bool
511 depends on !NO_IOMEM 456 depends on !NO_IOMEM
512 default y 457 default y
513 458
514 config HAS_IOPORT <<
515 bool <<
516 <<
517 config HAS_IOPORT_MAP 459 config HAS_IOPORT_MAP
518 bool 460 bool
519 depends on HAS_IOMEM && !NO_IOPORT_MAP 461 depends on HAS_IOMEM && !NO_IOPORT_MAP
520 default y 462 default y
521 463
522 source "kernel/dma/Kconfig" 464 source "kernel/dma/Kconfig"
523 465
524 config SGL_ALLOC 466 config SGL_ALLOC
525 bool 467 bool
526 default n 468 default n
527 469
528 config IOMMU_HELPER 470 config IOMMU_HELPER
529 bool 471 bool
530 472
531 config CHECK_SIGNATURE 473 config CHECK_SIGNATURE
532 bool 474 bool
533 475
534 config CPUMASK_OFFSTACK 476 config CPUMASK_OFFSTACK
535 bool "Force CPU masks off stack" if DE 477 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
536 help 478 help
537 Use dynamic allocation for cpumask_v 479 Use dynamic allocation for cpumask_var_t, instead of putting
538 them on the stack. This is a bit mo 480 them on the stack. This is a bit more expensive, but avoids
539 stack overflow. 481 stack overflow.
540 482
541 config FORCE_NR_CPUS <<
542 def_bool !SMP <<
543 <<
544 config CPU_RMAP 483 config CPU_RMAP
545 bool 484 bool
546 depends on SMP 485 depends on SMP
547 486
548 config DQL 487 config DQL
549 bool 488 bool
550 489
551 config GLOB 490 config GLOB
552 bool 491 bool
553 # This actually supports modular compila 492 # This actually supports modular compilation, but the module overhead
554 # is ridiculous for the amount of code i 493 # is ridiculous for the amount of code involved. Until an out-of-tree
555 # driver asks for it, we'll just link it 494 # driver asks for it, we'll just link it directly it into the kernel
556 # when required. Since we're ignoring o 495 # when required. Since we're ignoring out-of-tree users, there's also
557 # no need bother prompting for a manual 496 # no need bother prompting for a manual decision:
558 # prompt "glob_match() function" 497 # prompt "glob_match() function"
559 help 498 help
560 This option provides a glob_match fu 499 This option provides a glob_match function for performing
561 simple text pattern matching. It or 500 simple text pattern matching. It originated in the ATA code
562 to blacklist particular drive models 501 to blacklist particular drive models, but other device drivers
563 may need similar functionality. 502 may need similar functionality.
564 503
565 All drivers in the Linux kernel tree 504 All drivers in the Linux kernel tree that require this function
566 should automatically select this opt 505 should automatically select this option. Say N unless you
567 are compiling an out-of tree driver 506 are compiling an out-of tree driver which tells you that it
568 depends on this. 507 depends on this.
569 508
570 config GLOB_SELFTEST 509 config GLOB_SELFTEST
571 tristate "glob self-test on init" 510 tristate "glob self-test on init"
572 depends on GLOB 511 depends on GLOB
573 help 512 help
574 This option enables a simple self-te 513 This option enables a simple self-test of the glob_match
575 function on startup. It is primaril 514 function on startup. It is primarily useful for people
576 working on the code to ensure they h 515 working on the code to ensure they haven't introduced any
577 regressions. 516 regressions.
578 517
579 It only adds a little bit of code an 518 It only adds a little bit of code and slows kernel boot (or
580 module load) by a small amount, so y 519 module load) by a small amount, so you're welcome to play with
581 it, but you probably don't need it. 520 it, but you probably don't need it.
582 521
583 # 522 #
584 # Netlink attribute parsing support is select' 523 # Netlink attribute parsing support is select'ed if needed
585 # 524 #
586 config NLATTR 525 config NLATTR
587 bool 526 bool
588 527
589 # 528 #
590 # Generic 64-bit atomic support is selected if 529 # Generic 64-bit atomic support is selected if needed
591 # 530 #
592 config GENERIC_ATOMIC64 531 config GENERIC_ATOMIC64
593 bool 532 bool
594 533
595 config LRU_CACHE 534 config LRU_CACHE
596 tristate 535 tristate
597 536
598 config CLZ_TAB 537 config CLZ_TAB
599 bool 538 bool
600 539
601 config IRQ_POLL 540 config IRQ_POLL
602 bool "IRQ polling library" 541 bool "IRQ polling library"
603 help 542 help
604 Helper library to poll interrupt mit 543 Helper library to poll interrupt mitigation using polling.
605 544
606 config MPILIB 545 config MPILIB
607 tristate 546 tristate
608 select CLZ_TAB 547 select CLZ_TAB
609 help 548 help
610 Multiprecision maths library from Gn 549 Multiprecision maths library from GnuPG.
611 It is used to implement RSA digital 550 It is used to implement RSA digital signature verification,
612 which is used by IMA/EVM digital sig 551 which is used by IMA/EVM digital signature extension.
613 552
614 config SIGNATURE 553 config SIGNATURE
615 tristate 554 tristate
616 depends on KEYS 555 depends on KEYS
617 select CRYPTO 556 select CRYPTO
618 select CRYPTO_SHA1 557 select CRYPTO_SHA1
619 select MPILIB 558 select MPILIB
620 help 559 help
621 Digital signature verification. Curr 560 Digital signature verification. Currently only RSA is supported.
622 Implementation is done using GnuPG M 561 Implementation is done using GnuPG MPI library
623 562
624 config DIMLIB 563 config DIMLIB
625 tristate !! 564 bool
626 depends on NET <<
627 help 565 help
628 Dynamic Interrupt Moderation library 566 Dynamic Interrupt Moderation library.
629 Implements an algorithm for dynamica 567 Implements an algorithm for dynamically changing CQ moderation values
630 according to run time performance. 568 according to run time performance.
631 569
632 # 570 #
633 # libfdt files, only selected if needed. 571 # libfdt files, only selected if needed.
634 # 572 #
635 config LIBFDT 573 config LIBFDT
636 bool 574 bool
637 575
638 config OID_REGISTRY 576 config OID_REGISTRY
639 tristate 577 tristate
640 help 578 help
641 Enable fast lookup object identifier 579 Enable fast lookup object identifier registry.
642 580
643 config UCS2_STRING 581 config UCS2_STRING
644 tristate 582 tristate
645 583
646 # 584 #
647 # generic vdso 585 # generic vdso
648 # 586 #
649 source "lib/vdso/Kconfig" 587 source "lib/vdso/Kconfig"
650 588
651 source "lib/fonts/Kconfig" 589 source "lib/fonts/Kconfig"
652 590
653 config SG_SPLIT 591 config SG_SPLIT
654 def_bool n 592 def_bool n
655 help 593 help
656 Provides a helper to split scatterlis 594 Provides a helper to split scatterlists into chunks, each chunk being
657 a scatterlist. This should be selecte 595 a scatterlist. This should be selected by a driver or an API which
658 whishes to split a scatterlist amongs 596 whishes to split a scatterlist amongst multiple DMA channels.
659 597
660 config SG_POOL 598 config SG_POOL
661 def_bool n 599 def_bool n
662 help 600 help
663 Provides a helper to allocate chained 601 Provides a helper to allocate chained scatterlists. This should be
664 selected by a driver or an API which 602 selected by a driver or an API which whishes to allocate chained
665 scatterlist. 603 scatterlist.
666 604
667 # 605 #
668 # sg chaining option 606 # sg chaining option
669 # 607 #
670 608
671 config ARCH_NO_SG_CHAIN 609 config ARCH_NO_SG_CHAIN
672 def_bool n 610 def_bool n
673 611
674 config ARCH_HAS_PMEM_API 612 config ARCH_HAS_PMEM_API
675 bool 613 bool
676 614
677 config MEMREGION 615 config MEMREGION
678 bool 616 bool
679 617
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 618 # use memcpy to implement user copies for nommu architectures
687 config UACCESS_MEMCPY 619 config UACCESS_MEMCPY
688 bool 620 bool
689 621
690 config ARCH_HAS_UACCESS_FLUSHCACHE 622 config ARCH_HAS_UACCESS_FLUSHCACHE
691 bool 623 bool
692 624
693 # arch has a concept of a recoverable synchron !! 625 config ARCH_HAS_UACCESS_MCSAFE
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 626 bool
700 627
701 # Temporary. Goes away when all archs are clea 628 # Temporary. Goes away when all archs are cleaned up
702 config ARCH_STACKWALK 629 config ARCH_STACKWALK
703 bool 630 bool
704 631
705 config STACKDEPOT 632 config STACKDEPOT
706 bool 633 bool
707 select STACKTRACE 634 select STACKTRACE
708 help <<
709 Stack depot: stack trace storage tha <<
710 <<
711 config STACKDEPOT_ALWAYS_INIT <<
712 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 <<
727 635
728 config SBITMAP 636 config SBITMAP
729 bool 637 bool
730 638
731 config PARMAN 639 config PARMAN
732 tristate "parman" if COMPILE_TEST 640 tristate "parman" if COMPILE_TEST
733 641
734 config OBJAGG 642 config OBJAGG
735 tristate "objagg" if COMPILE_TEST 643 tristate "objagg" if COMPILE_TEST
736 644
737 config LWQ_TEST !! 645 config STRING_SELFTEST
738 bool "Boot-time test for lwq queuing" !! 646 tristate "Test string functions"
739 help <<
740 Run boot-time test of light-weight q <<
741 647
742 endmenu 648 endmenu
743 649
744 config GENERIC_IOREMAP 650 config GENERIC_IOREMAP
745 bool 651 bool
746 652
747 config GENERIC_LIB_ASHLDI3 653 config GENERIC_LIB_ASHLDI3
748 bool 654 bool
749 655
750 config GENERIC_LIB_ASHRDI3 656 config GENERIC_LIB_ASHRDI3
751 bool 657 bool
752 658
753 config GENERIC_LIB_LSHRDI3 659 config GENERIC_LIB_LSHRDI3
754 bool 660 bool
755 661
756 config GENERIC_LIB_MULDI3 662 config GENERIC_LIB_MULDI3
757 bool 663 bool
758 664
759 config GENERIC_LIB_CMPDI2 665 config GENERIC_LIB_CMPDI2
760 bool 666 bool
761 667
762 config GENERIC_LIB_UCMPDI2 668 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 669 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.