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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