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 22 config LINEAR_RANGES
23 tristate 23 tristate
24 24
25 config PACKING 25 config PACKING
26 bool "Generic bitfield packing and unp 26 bool "Generic bitfield packing and unpacking"
27 select BITREVERSE <<
28 default n 27 default n
29 help 28 help
30 This option provides the packing() h 29 This option provides the packing() helper function, which permits
31 converting bitfields between a CPU-u 30 converting bitfields between a CPU-usable representation and a
32 memory representation that can have 31 memory representation that can have any combination of these quirks:
33 - Is little endian (bytes are reve 32 - Is little endian (bytes are reversed within a 32-bit group)
34 - The least-significant 32-bit wor 33 - The least-significant 32-bit word comes first (within a 64-bit
35 group) 34 group)
36 - The most significant bit of a by 35 - The most significant bit of a byte is at its right (bit 0 of a
37 register description is numerica 36 register description is numerically 2^7).
38 Drivers may use these helpers to mat 37 Drivers may use these helpers to match the bit indices as described
39 in the data sheets of the peripheral 38 in the data sheets of the peripherals they are in control of.
40 39
41 When in doubt, say N. 40 When in doubt, say N.
42 41
43 config BITREVERSE 42 config BITREVERSE
44 tristate 43 tristate
45 44
46 config HAVE_ARCH_BITREVERSE 45 config HAVE_ARCH_BITREVERSE
47 bool 46 bool
48 default n 47 default n
>> 48 depends on BITREVERSE
49 help 49 help
50 This option enables the use of hardw 50 This option enables the use of hardware bit-reversal instructions on
51 architectures which support such ope 51 architectures which support such operations.
52 52
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 53 config GENERIC_STRNCPY_FROM_USER
60 def_bool !ARCH_HAS_STRNCPY_FROM_USER !! 54 bool
61 55
62 config GENERIC_STRNLEN_USER 56 config GENERIC_STRNLEN_USER
63 def_bool !ARCH_HAS_STRNLEN_USER !! 57 bool
64 58
65 config GENERIC_NET_UTILS 59 config GENERIC_NET_UTILS
66 bool 60 bool
67 61
>> 62 config GENERIC_FIND_FIRST_BIT
>> 63 bool
>> 64
68 source "lib/math/Kconfig" 65 source "lib/math/Kconfig"
69 66
70 config NO_GENERIC_PCI_IOPORT_MAP 67 config NO_GENERIC_PCI_IOPORT_MAP
71 bool 68 bool
72 69
>> 70 config GENERIC_PCI_IOMAP
>> 71 bool
>> 72
73 config GENERIC_IOMAP 73 config GENERIC_IOMAP
74 bool 74 bool
75 select GENERIC_PCI_IOMAP 75 select GENERIC_PCI_IOMAP
76 76
77 config STMP_DEVICE 77 config STMP_DEVICE
78 bool 78 bool
79 79
80 config ARCH_USE_CMPXCHG_LOCKREF 80 config ARCH_USE_CMPXCHG_LOCKREF
81 bool 81 bool
82 82
83 config ARCH_HAS_FAST_MULTIPLIER 83 config ARCH_HAS_FAST_MULTIPLIER
84 bool 84 bool
85 85
86 config ARCH_USE_SYM_ANNOTATIONS 86 config ARCH_USE_SYM_ANNOTATIONS
87 bool 87 bool
88 88
89 config INDIRECT_PIO 89 config INDIRECT_PIO
90 bool "Access I/O in non-MMIO mode" 90 bool "Access I/O in non-MMIO mode"
91 depends on ARM64 91 depends on ARM64
92 depends on HAS_IOPORT <<
93 help 92 help
94 On some platforms where no separate 93 On some platforms where no separate I/O space exists, there are I/O
95 hosts which can not be accessed in M 94 hosts which can not be accessed in MMIO mode. Using the logical PIO
96 mechanism, the host-local I/O resour 95 mechanism, the host-local I/O resource can be mapped into system
97 logic PIO space shared with MMIO hos 96 logic PIO space shared with MMIO hosts, such as PCI/PCIe, then the
98 system can access the I/O devices wi 97 system can access the I/O devices with the mapped-logic PIO through
99 I/O accessors. 98 I/O accessors.
100 99
101 This way has relatively little I/O p 100 This way has relatively little I/O performance cost. Please make
102 sure your devices really need this c 101 sure your devices really need this configure item enabled.
103 102
104 When in doubt, say N. 103 When in doubt, say N.
105 104
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 105 config CRC_CCITT
130 tristate "CRC-CCITT functions" 106 tristate "CRC-CCITT functions"
131 help 107 help
132 This option is provided for the case 108 This option is provided for the case where no in-kernel-tree
133 modules require CRC-CCITT functions, 109 modules require CRC-CCITT functions, but a module built outside
134 the kernel tree does. Such modules t 110 the kernel tree does. Such modules that use library CRC-CCITT
135 functions require M here. 111 functions require M here.
136 112
137 config CRC16 113 config CRC16
138 tristate "CRC16 functions" 114 tristate "CRC16 functions"
139 help 115 help
140 This option is provided for the case 116 This option is provided for the case where no in-kernel-tree
141 modules require CRC16 functions, but 117 modules require CRC16 functions, but a module built outside
142 the kernel tree does. Such modules t 118 the kernel tree does. Such modules that use library CRC16
143 functions require M here. 119 functions require M here.
144 120
145 config CRC_T10DIF 121 config CRC_T10DIF
146 tristate "CRC calculation for the T10 122 tristate "CRC calculation for the T10 Data Integrity Field"
147 select CRYPTO 123 select CRYPTO
148 select CRYPTO_CRCT10DIF 124 select CRYPTO_CRCT10DIF
149 help 125 help
150 This option is only needed if a modu 126 This option is only needed if a module that's not in the
151 kernel tree needs to calculate CRC c 127 kernel tree needs to calculate CRC checks for use with the
152 SCSI data integrity subsystem. 128 SCSI data integrity subsystem.
153 129
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 130 config CRC_ITU_T
164 tristate "CRC ITU-T V.41 functions" 131 tristate "CRC ITU-T V.41 functions"
165 help 132 help
166 This option is provided for the case 133 This option is provided for the case where no in-kernel-tree
167 modules require CRC ITU-T V.41 funct 134 modules require CRC ITU-T V.41 functions, but a module built outside
168 the kernel tree does. Such modules t 135 the kernel tree does. Such modules that use library CRC ITU-T V.41
169 functions require M here. 136 functions require M here.
170 137
171 config CRC32 138 config CRC32
172 tristate "CRC32/CRC32c functions" 139 tristate "CRC32/CRC32c functions"
173 default y 140 default y
174 select BITREVERSE 141 select BITREVERSE
175 help 142 help
176 This option is provided for the case 143 This option is provided for the case where no in-kernel-tree
177 modules require CRC32/CRC32c functio 144 modules require CRC32/CRC32c functions, but a module built outside
178 the kernel tree does. Such modules t 145 the kernel tree does. Such modules that use library CRC32/CRC32c
179 functions require M here. 146 functions require M here.
180 147
181 config CRC32_SELFTEST 148 config CRC32_SELFTEST
182 tristate "CRC32 perform self test on i 149 tristate "CRC32 perform self test on init"
183 depends on CRC32 150 depends on CRC32
184 help 151 help
185 This option enables the CRC32 librar 152 This option enables the CRC32 library functions to perform a
186 self test on initialization. The sel 153 self test on initialization. The self test computes crc32_le
187 and crc32_be over byte strings with 154 and crc32_be over byte strings with random alignment and length
188 and computes the total elapsed time 155 and computes the total elapsed time and number of bytes processed.
189 156
190 choice 157 choice
191 prompt "CRC32 implementation" 158 prompt "CRC32 implementation"
192 depends on CRC32 159 depends on CRC32
193 default CRC32_SLICEBY8 160 default CRC32_SLICEBY8
194 help 161 help
195 This option allows a kernel builder 162 This option allows a kernel builder to override the default choice
196 of CRC32 algorithm. Choose the defa 163 of CRC32 algorithm. Choose the default ("slice by 8") unless you
197 know that you need one of the others 164 know that you need one of the others.
198 165
199 config CRC32_SLICEBY8 166 config CRC32_SLICEBY8
200 bool "Slice by 8 bytes" 167 bool "Slice by 8 bytes"
201 help 168 help
202 Calculate checksum 8 bytes at a time 169 Calculate checksum 8 bytes at a time with a clever slicing algorithm.
203 This is the fastest algorithm, but c 170 This is the fastest algorithm, but comes with a 8KiB lookup table.
204 Most modern processors have enough c 171 Most modern processors have enough cache to hold this table without
205 thrashing the cache. 172 thrashing the cache.
206 173
207 This is the default implementation c 174 This is the default implementation choice. Choose this one unless
208 you have a good reason not to. 175 you have a good reason not to.
209 176
210 config CRC32_SLICEBY4 177 config CRC32_SLICEBY4
211 bool "Slice by 4 bytes" 178 bool "Slice by 4 bytes"
212 help 179 help
213 Calculate checksum 4 bytes at a time 180 Calculate checksum 4 bytes at a time with a clever slicing algorithm.
214 This is a bit slower than slice by 8 181 This is a bit slower than slice by 8, but has a smaller 4KiB lookup
215 table. 182 table.
216 183
217 Only choose this option if you know 184 Only choose this option if you know what you are doing.
218 185
219 config CRC32_SARWATE 186 config CRC32_SARWATE
220 bool "Sarwate's Algorithm (one byte at 187 bool "Sarwate's Algorithm (one byte at a time)"
221 help 188 help
222 Calculate checksum a byte at a time 189 Calculate checksum a byte at a time using Sarwate's algorithm. This
223 is not particularly fast, but has a 190 is not particularly fast, but has a small 256 byte lookup table.
224 191
225 Only choose this option if you know 192 Only choose this option if you know what you are doing.
226 193
227 config CRC32_BIT 194 config CRC32_BIT
228 bool "Classic Algorithm (one bit at a 195 bool "Classic Algorithm (one bit at a time)"
229 help 196 help
230 Calculate checksum one bit at a time 197 Calculate checksum one bit at a time. This is VERY slow, but has
231 no lookup table. This is provided a 198 no lookup table. This is provided as a debugging option.
232 199
233 Only choose this option if you are d 200 Only choose this option if you are debugging crc32.
234 201
235 endchoice 202 endchoice
236 203
237 config CRC64 204 config CRC64
238 tristate "CRC64 functions" 205 tristate "CRC64 functions"
239 help 206 help
240 This option is provided for the case 207 This option is provided for the case where no in-kernel-tree
241 modules require CRC64 functions, but 208 modules require CRC64 functions, but a module built outside
242 the kernel tree does. Such modules t 209 the kernel tree does. Such modules that use library CRC64
243 functions require M here. 210 functions require M here.
244 211
245 config CRC4 212 config CRC4
246 tristate "CRC4 functions" 213 tristate "CRC4 functions"
247 help 214 help
248 This option is provided for the case 215 This option is provided for the case where no in-kernel-tree
249 modules require CRC4 functions, but 216 modules require CRC4 functions, but a module built outside
250 the kernel tree does. Such modules t 217 the kernel tree does. Such modules that use library CRC4
251 functions require M here. 218 functions require M here.
252 219
253 config CRC7 220 config CRC7
254 tristate "CRC7 functions" 221 tristate "CRC7 functions"
255 help 222 help
256 This option is provided for the case 223 This option is provided for the case where no in-kernel-tree
257 modules require CRC7 functions, but 224 modules require CRC7 functions, but a module built outside
258 the kernel tree does. Such modules t 225 the kernel tree does. Such modules that use library CRC7
259 functions require M here. 226 functions require M here.
260 227
261 config LIBCRC32C 228 config LIBCRC32C
262 tristate "CRC32c (Castagnoli, et al) C 229 tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
263 select CRYPTO 230 select CRYPTO
264 select CRYPTO_CRC32C 231 select CRYPTO_CRC32C
265 help 232 help
266 This option is provided for the case 233 This option is provided for the case where no in-kernel-tree
267 modules require CRC32c functions, bu 234 modules require CRC32c functions, but a module built outside the
268 kernel tree does. Such modules that 235 kernel tree does. Such modules that use library CRC32c functions
269 require M here. See Castagnoli93. 236 require M here. See Castagnoli93.
270 Module will be libcrc32c. 237 Module will be libcrc32c.
271 238
272 config CRC8 239 config CRC8
273 tristate "CRC8 function" 240 tristate "CRC8 function"
274 help 241 help
275 This option provides CRC8 function. 242 This option provides CRC8 function. Drivers may select this
276 when they need to do cyclic redundan 243 when they need to do cyclic redundancy check according CRC8
277 algorithm. Module will be called crc 244 algorithm. Module will be called crc8.
278 245
279 config XXHASH 246 config XXHASH
280 tristate 247 tristate
281 248
282 config AUDIT_GENERIC 249 config AUDIT_GENERIC
283 bool 250 bool
284 depends on AUDIT && !AUDIT_ARCH 251 depends on AUDIT && !AUDIT_ARCH
285 default y 252 default y
286 253
287 config AUDIT_ARCH_COMPAT_GENERIC 254 config AUDIT_ARCH_COMPAT_GENERIC
288 bool 255 bool
289 default n 256 default n
290 257
291 config AUDIT_COMPAT_GENERIC 258 config AUDIT_COMPAT_GENERIC
292 bool 259 bool
293 depends on AUDIT_GENERIC && AUDIT_ARCH 260 depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
294 default y 261 default y
295 262
296 config RANDOM32_SELFTEST 263 config RANDOM32_SELFTEST
297 bool "PRNG perform self test on init" 264 bool "PRNG perform self test on init"
298 help 265 help
299 This option enables the 32 bit PRNG 266 This option enables the 32 bit PRNG library functions to perform a
300 self test on initialization. 267 self test on initialization.
301 268
302 # 269 #
303 # compression support is select'ed if needed 270 # compression support is select'ed if needed
304 # 271 #
305 config 842_COMPRESS 272 config 842_COMPRESS
306 select CRC32 273 select CRC32
307 tristate 274 tristate
308 275
309 config 842_DECOMPRESS 276 config 842_DECOMPRESS
310 select CRC32 277 select CRC32
311 tristate 278 tristate
312 279
313 config ZLIB_INFLATE 280 config ZLIB_INFLATE
314 tristate 281 tristate
315 282
316 config ZLIB_DEFLATE 283 config ZLIB_DEFLATE
317 tristate 284 tristate
318 select BITREVERSE 285 select BITREVERSE
319 286
320 config ZLIB_DFLTCC 287 config ZLIB_DFLTCC
321 def_bool y 288 def_bool y
322 depends on S390 289 depends on S390
323 prompt "Enable s390x DEFLATE CONVERSIO 290 prompt "Enable s390x DEFLATE CONVERSION CALL support for kernel zlib"
324 help 291 help
325 Enable s390x hardware support for zli 292 Enable s390x hardware support for zlib in the kernel.
326 293
327 config LZO_COMPRESS 294 config LZO_COMPRESS
328 tristate 295 tristate
329 296
330 config LZO_DECOMPRESS 297 config LZO_DECOMPRESS
331 tristate 298 tristate
332 299
333 config LZ4_COMPRESS 300 config LZ4_COMPRESS
334 tristate 301 tristate
335 302
336 config LZ4HC_COMPRESS 303 config LZ4HC_COMPRESS
337 tristate 304 tristate
338 305
339 config LZ4_DECOMPRESS 306 config LZ4_DECOMPRESS
340 tristate 307 tristate
341 308
342 config ZSTD_COMMON <<
343 select XXHASH <<
344 tristate <<
345 <<
346 config ZSTD_COMPRESS 309 config ZSTD_COMPRESS
347 select ZSTD_COMMON !! 310 select XXHASH
348 tristate 311 tristate
349 312
350 config ZSTD_DECOMPRESS 313 config ZSTD_DECOMPRESS
351 select ZSTD_COMMON !! 314 select XXHASH
352 tristate 315 tristate
353 316
354 source "lib/xz/Kconfig" 317 source "lib/xz/Kconfig"
355 318
356 # 319 #
357 # These all provide a common interface (hence 320 # These all provide a common interface (hence the apparent duplication with
358 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrap 321 # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
359 # 322 #
360 config DECOMPRESS_GZIP 323 config DECOMPRESS_GZIP
361 select ZLIB_INFLATE 324 select ZLIB_INFLATE
362 tristate 325 tristate
363 326
364 config DECOMPRESS_BZIP2 327 config DECOMPRESS_BZIP2
365 tristate 328 tristate
366 329
367 config DECOMPRESS_LZMA 330 config DECOMPRESS_LZMA
368 tristate 331 tristate
369 332
370 config DECOMPRESS_XZ 333 config DECOMPRESS_XZ
371 select XZ_DEC 334 select XZ_DEC
372 tristate 335 tristate
373 336
374 config DECOMPRESS_LZO 337 config DECOMPRESS_LZO
375 select LZO_DECOMPRESS 338 select LZO_DECOMPRESS
376 tristate 339 tristate
377 340
378 config DECOMPRESS_LZ4 341 config DECOMPRESS_LZ4
379 select LZ4_DECOMPRESS 342 select LZ4_DECOMPRESS
380 tristate 343 tristate
381 344
382 config DECOMPRESS_ZSTD <<
383 select ZSTD_DECOMPRESS <<
384 tristate <<
385 <<
386 # 345 #
387 # Generic allocator support is selected if nee 346 # Generic allocator support is selected if needed
388 # 347 #
389 config GENERIC_ALLOCATOR 348 config GENERIC_ALLOCATOR
390 bool 349 bool
391 350
392 # 351 #
393 # reed solomon support is select'ed if needed 352 # reed solomon support is select'ed if needed
394 # 353 #
395 config REED_SOLOMON 354 config REED_SOLOMON
396 tristate 355 tristate
397 356
398 config REED_SOLOMON_ENC8 357 config REED_SOLOMON_ENC8
399 bool 358 bool
400 359
401 config REED_SOLOMON_DEC8 360 config REED_SOLOMON_DEC8
402 bool 361 bool
403 362
404 config REED_SOLOMON_ENC16 363 config REED_SOLOMON_ENC16
405 bool 364 bool
406 365
407 config REED_SOLOMON_DEC16 366 config REED_SOLOMON_DEC16
408 bool 367 bool
409 368
410 # 369 #
411 # BCH support is selected if needed 370 # BCH support is selected if needed
412 # 371 #
413 config BCH 372 config BCH
414 tristate 373 tristate
415 select BITREVERSE <<
416 374
417 config BCH_CONST_PARAMS 375 config BCH_CONST_PARAMS
418 bool 376 bool
419 help 377 help
420 Drivers may select this option to fo 378 Drivers may select this option to force specific constant
421 values for parameters 'm' (Galois fi 379 values for parameters 'm' (Galois field order) and 't'
422 (error correction capability). Those 380 (error correction capability). Those specific values must
423 be set by declaring default values f 381 be set by declaring default values for symbols BCH_CONST_M
424 and BCH_CONST_T. 382 and BCH_CONST_T.
425 Doing so will enable extra compiler 383 Doing so will enable extra compiler optimizations,
426 improving encoding and decoding perf 384 improving encoding and decoding performance up to 2x for
427 usual (m,t) values (typically such t 385 usual (m,t) values (typically such that m*t < 200).
428 When this option is selected, the BC 386 When this option is selected, the BCH library supports
429 only a single (m,t) configuration. T 387 only a single (m,t) configuration. This is mainly useful
430 for NAND flash board drivers requiri 388 for NAND flash board drivers requiring known, fixed BCH
431 parameters. 389 parameters.
432 390
433 config BCH_CONST_M 391 config BCH_CONST_M
434 int 392 int
435 range 5 15 393 range 5 15
436 help 394 help
437 Constant value for Galois field orde 395 Constant value for Galois field order 'm'. If 'k' is the
438 number of data bits to protect, 'm' 396 number of data bits to protect, 'm' should be chosen such
439 that (k + m*t) <= 2**m - 1. 397 that (k + m*t) <= 2**m - 1.
440 Drivers should declare a default val 398 Drivers should declare a default value for this symbol if
441 they select option BCH_CONST_PARAMS. 399 they select option BCH_CONST_PARAMS.
442 400
443 config BCH_CONST_T 401 config BCH_CONST_T
444 int 402 int
445 help 403 help
446 Constant value for error correction 404 Constant value for error correction capability in bits 't'.
447 Drivers should declare a default val 405 Drivers should declare a default value for this symbol if
448 they select option BCH_CONST_PARAMS. 406 they select option BCH_CONST_PARAMS.
449 407
450 # 408 #
451 # Textsearch support is select'ed if needed 409 # Textsearch support is select'ed if needed
452 # 410 #
453 config TEXTSEARCH 411 config TEXTSEARCH
454 bool 412 bool
455 413
456 config TEXTSEARCH_KMP 414 config TEXTSEARCH_KMP
457 tristate 415 tristate
458 416
459 config TEXTSEARCH_BM 417 config TEXTSEARCH_BM
460 tristate 418 tristate
461 419
462 config TEXTSEARCH_FSM 420 config TEXTSEARCH_FSM
463 tristate 421 tristate
464 422
465 config BTREE 423 config BTREE
466 bool 424 bool
467 425
468 config INTERVAL_TREE 426 config INTERVAL_TREE
469 bool 427 bool
470 help 428 help
471 Simple, embeddable, interval-tree. C 429 Simple, embeddable, interval-tree. Can find the start of an
472 overlapping range in log(n) time and 430 overlapping range in log(n) time and then iterate over all
473 overlapping nodes. The algorithm is 431 overlapping nodes. The algorithm is implemented as an
474 augmented rbtree. 432 augmented rbtree.
475 433
476 See: 434 See:
477 435
478 Documentation/core-api/rbtree. 436 Documentation/core-api/rbtree.rst
479 437
480 for more information. 438 for more information.
481 439
482 config INTERVAL_TREE_SPAN_ITER <<
483 bool <<
484 depends on INTERVAL_TREE <<
485 <<
486 config XARRAY_MULTI 440 config XARRAY_MULTI
487 bool 441 bool
488 help 442 help
489 Support entries which occupy multipl 443 Support entries which occupy multiple consecutive indices in the
490 XArray. 444 XArray.
491 445
492 config ASSOCIATIVE_ARRAY 446 config ASSOCIATIVE_ARRAY
493 bool 447 bool
494 help 448 help
495 Generic associative array. Can be s 449 Generic associative array. Can be searched and iterated over whilst
496 it is being modified. It is also re 450 it is being modified. It is also reasonably quick to search and
497 modify. The algorithms are non-recu 451 modify. The algorithms are non-recursive, and the trees are highly
498 capacious. 452 capacious.
499 453
500 See: 454 See:
501 455
502 Documentation/core-api/assoc_a 456 Documentation/core-api/assoc_array.rst
503 457
504 for more information. 458 for more information.
505 459
506 config CLOSURES <<
507 bool <<
508 <<
509 config HAS_IOMEM 460 config HAS_IOMEM
510 bool 461 bool
511 depends on !NO_IOMEM 462 depends on !NO_IOMEM
512 default y 463 default y
513 464
514 config HAS_IOPORT <<
515 bool <<
516 <<
517 config HAS_IOPORT_MAP 465 config HAS_IOPORT_MAP
518 bool 466 bool
519 depends on HAS_IOMEM && !NO_IOPORT_MAP 467 depends on HAS_IOMEM && !NO_IOPORT_MAP
520 default y 468 default y
521 469
522 source "kernel/dma/Kconfig" 470 source "kernel/dma/Kconfig"
523 471
524 config SGL_ALLOC 472 config SGL_ALLOC
525 bool 473 bool
526 default n 474 default n
527 475
528 config IOMMU_HELPER 476 config IOMMU_HELPER
529 bool 477 bool
530 478
531 config CHECK_SIGNATURE 479 config CHECK_SIGNATURE
532 bool 480 bool
533 481
534 config CPUMASK_OFFSTACK 482 config CPUMASK_OFFSTACK
535 bool "Force CPU masks off stack" if DE 483 bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
536 help 484 help
537 Use dynamic allocation for cpumask_v 485 Use dynamic allocation for cpumask_var_t, instead of putting
538 them on the stack. This is a bit mo 486 them on the stack. This is a bit more expensive, but avoids
539 stack overflow. 487 stack overflow.
540 488
541 config FORCE_NR_CPUS <<
542 def_bool !SMP <<
543 <<
544 config CPU_RMAP 489 config CPU_RMAP
545 bool 490 bool
546 depends on SMP 491 depends on SMP
547 492
548 config DQL 493 config DQL
549 bool 494 bool
550 495
551 config GLOB 496 config GLOB
552 bool 497 bool
553 # This actually supports modular compila 498 # This actually supports modular compilation, but the module overhead
554 # is ridiculous for the amount of code i 499 # is ridiculous for the amount of code involved. Until an out-of-tree
555 # driver asks for it, we'll just link it 500 # driver asks for it, we'll just link it directly it into the kernel
556 # when required. Since we're ignoring o 501 # when required. Since we're ignoring out-of-tree users, there's also
557 # no need bother prompting for a manual 502 # no need bother prompting for a manual decision:
558 # prompt "glob_match() function" 503 # prompt "glob_match() function"
559 help 504 help
560 This option provides a glob_match fu 505 This option provides a glob_match function for performing
561 simple text pattern matching. It or 506 simple text pattern matching. It originated in the ATA code
562 to blacklist particular drive models 507 to blacklist particular drive models, but other device drivers
563 may need similar functionality. 508 may need similar functionality.
564 509
565 All drivers in the Linux kernel tree 510 All drivers in the Linux kernel tree that require this function
566 should automatically select this opt 511 should automatically select this option. Say N unless you
567 are compiling an out-of tree driver 512 are compiling an out-of tree driver which tells you that it
568 depends on this. 513 depends on this.
569 514
570 config GLOB_SELFTEST 515 config GLOB_SELFTEST
571 tristate "glob self-test on init" 516 tristate "glob self-test on init"
572 depends on GLOB 517 depends on GLOB
573 help 518 help
574 This option enables a simple self-te 519 This option enables a simple self-test of the glob_match
575 function on startup. It is primaril 520 function on startup. It is primarily useful for people
576 working on the code to ensure they h 521 working on the code to ensure they haven't introduced any
577 regressions. 522 regressions.
578 523
579 It only adds a little bit of code an 524 It only adds a little bit of code and slows kernel boot (or
580 module load) by a small amount, so y 525 module load) by a small amount, so you're welcome to play with
581 it, but you probably don't need it. 526 it, but you probably don't need it.
582 527
583 # 528 #
584 # Netlink attribute parsing support is select' 529 # Netlink attribute parsing support is select'ed if needed
585 # 530 #
586 config NLATTR 531 config NLATTR
587 bool 532 bool
588 533
589 # 534 #
590 # Generic 64-bit atomic support is selected if 535 # Generic 64-bit atomic support is selected if needed
591 # 536 #
592 config GENERIC_ATOMIC64 537 config GENERIC_ATOMIC64
593 bool 538 bool
594 539
595 config LRU_CACHE 540 config LRU_CACHE
596 tristate 541 tristate
597 542
598 config CLZ_TAB 543 config CLZ_TAB
599 bool 544 bool
600 545
601 config IRQ_POLL 546 config IRQ_POLL
602 bool "IRQ polling library" 547 bool "IRQ polling library"
603 help 548 help
604 Helper library to poll interrupt mit 549 Helper library to poll interrupt mitigation using polling.
605 550
606 config MPILIB 551 config MPILIB
607 tristate 552 tristate
608 select CLZ_TAB 553 select CLZ_TAB
609 help 554 help
610 Multiprecision maths library from Gn 555 Multiprecision maths library from GnuPG.
611 It is used to implement RSA digital 556 It is used to implement RSA digital signature verification,
612 which is used by IMA/EVM digital sig 557 which is used by IMA/EVM digital signature extension.
613 558
614 config SIGNATURE 559 config SIGNATURE
615 tristate 560 tristate
616 depends on KEYS 561 depends on KEYS
617 select CRYPTO 562 select CRYPTO
618 select CRYPTO_SHA1 563 select CRYPTO_SHA1
619 select MPILIB 564 select MPILIB
620 help 565 help
621 Digital signature verification. Curr 566 Digital signature verification. Currently only RSA is supported.
622 Implementation is done using GnuPG M 567 Implementation is done using GnuPG MPI library
623 568
624 config DIMLIB 569 config DIMLIB
625 tristate !! 570 bool
626 depends on NET <<
627 help 571 help
628 Dynamic Interrupt Moderation library 572 Dynamic Interrupt Moderation library.
629 Implements an algorithm for dynamica 573 Implements an algorithm for dynamically changing CQ moderation values
630 according to run time performance. 574 according to run time performance.
631 575
632 # 576 #
633 # libfdt files, only selected if needed. 577 # libfdt files, only selected if needed.
634 # 578 #
635 config LIBFDT 579 config LIBFDT
636 bool 580 bool
637 581
638 config OID_REGISTRY 582 config OID_REGISTRY
639 tristate 583 tristate
640 help 584 help
641 Enable fast lookup object identifier 585 Enable fast lookup object identifier registry.
642 586
643 config UCS2_STRING 587 config UCS2_STRING
644 tristate 588 tristate
645 589
646 # 590 #
647 # generic vdso 591 # generic vdso
648 # 592 #
649 source "lib/vdso/Kconfig" 593 source "lib/vdso/Kconfig"
650 594
651 source "lib/fonts/Kconfig" 595 source "lib/fonts/Kconfig"
652 596
653 config SG_SPLIT 597 config SG_SPLIT
654 def_bool n 598 def_bool n
655 help 599 help
656 Provides a helper to split scatterlis 600 Provides a helper to split scatterlists into chunks, each chunk being
657 a scatterlist. This should be selecte 601 a scatterlist. This should be selected by a driver or an API which
658 whishes to split a scatterlist amongs 602 whishes to split a scatterlist amongst multiple DMA channels.
659 603
660 config SG_POOL 604 config SG_POOL
661 def_bool n 605 def_bool n
662 help 606 help
663 Provides a helper to allocate chained 607 Provides a helper to allocate chained scatterlists. This should be
664 selected by a driver or an API which 608 selected by a driver or an API which whishes to allocate chained
665 scatterlist. 609 scatterlist.
666 610
667 # 611 #
668 # sg chaining option 612 # sg chaining option
669 # 613 #
670 614
671 config ARCH_NO_SG_CHAIN 615 config ARCH_NO_SG_CHAIN
672 def_bool n 616 def_bool n
673 617
674 config ARCH_HAS_PMEM_API 618 config ARCH_HAS_PMEM_API
675 bool 619 bool
676 620
677 config MEMREGION 621 config MEMREGION
678 bool 622 bool
679 623
680 config ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION <<
681 bool <<
682 <<
683 config ARCH_HAS_MEMREMAP_COMPAT_ALIGN 624 config ARCH_HAS_MEMREMAP_COMPAT_ALIGN
684 bool 625 bool
685 626
686 # use memcpy to implement user copies for nomm 627 # use memcpy to implement user copies for nommu architectures
687 config UACCESS_MEMCPY 628 config UACCESS_MEMCPY
688 bool 629 bool
689 630
690 config ARCH_HAS_UACCESS_FLUSHCACHE 631 config ARCH_HAS_UACCESS_FLUSHCACHE
691 bool 632 bool
692 633
693 # arch has a concept of a recoverable synchron 634 # arch has a concept of a recoverable synchronous exception due to a
694 # memory-read error like x86 machine-check or 635 # memory-read error like x86 machine-check or ARM data-abort, and
695 # implements copy_mc_to_{user,kernel} to abort 636 # implements copy_mc_to_{user,kernel} to abort and report
696 # 'bytes-transferred' if that exception fires 637 # 'bytes-transferred' if that exception fires when accessing the source
697 # buffer. 638 # buffer.
698 config ARCH_HAS_COPY_MC 639 config ARCH_HAS_COPY_MC
699 bool 640 bool
700 641
701 # Temporary. Goes away when all archs are clea 642 # Temporary. Goes away when all archs are cleaned up
702 config ARCH_STACKWALK 643 config ARCH_STACKWALK
703 bool 644 bool
704 645
705 config STACKDEPOT 646 config STACKDEPOT
706 bool 647 bool
707 select STACKTRACE 648 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 <<
727 649
728 config SBITMAP 650 config SBITMAP
729 bool 651 bool
730 652
731 config PARMAN 653 config PARMAN
732 tristate "parman" if COMPILE_TEST 654 tristate "parman" if COMPILE_TEST
733 655
734 config OBJAGG 656 config OBJAGG
735 tristate "objagg" if COMPILE_TEST 657 tristate "objagg" if COMPILE_TEST
736 658
737 config LWQ_TEST !! 659 config STRING_SELFTEST
738 bool "Boot-time test for lwq queuing" !! 660 tristate "Test string functions"
739 help <<
740 Run boot-time test of light-weight q <<
741 661
742 endmenu 662 endmenu
743 663
744 config GENERIC_IOREMAP 664 config GENERIC_IOREMAP
745 bool 665 bool
746 666
747 config GENERIC_LIB_ASHLDI3 667 config GENERIC_LIB_ASHLDI3
748 bool 668 bool
749 669
750 config GENERIC_LIB_ASHRDI3 670 config GENERIC_LIB_ASHRDI3
751 bool 671 bool
752 672
753 config GENERIC_LIB_LSHRDI3 673 config GENERIC_LIB_LSHRDI3
754 bool 674 bool
755 675
756 config GENERIC_LIB_MULDI3 676 config GENERIC_LIB_MULDI3
757 bool 677 bool
758 678
759 config GENERIC_LIB_CMPDI2 679 config GENERIC_LIB_CMPDI2
760 bool 680 bool
761 681
762 config GENERIC_LIB_UCMPDI2 682 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 683 bool
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