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