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