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