| # |
| # Library configuration |
| # |
| |
| config BINARY_PRINTF |
| def_bool n |
| |
| menu "Library routines" |
| |
| config RAID6_PQ |
| tristate |
| |
| config BITREVERSE |
| tristate |
| |
| config HAVE_ARCH_BITREVERSE |
| bool |
| default n |
| depends on BITREVERSE |
| help |
| This option enables the use of hardware bit-reversal instructions on |
| architectures which support such operations. |
| |
| config RATIONAL |
| bool |
| |
| config GENERIC_STRNCPY_FROM_USER |
| bool |
| |
| config GENERIC_STRNLEN_USER |
| bool |
| |
| config GENERIC_NET_UTILS |
| bool |
| |
| config GENERIC_FIND_FIRST_BIT |
| bool |
| |
| config NO_GENERIC_PCI_IOPORT_MAP |
| bool |
| |
| config GENERIC_PCI_IOMAP |
| bool |
| |
| config GENERIC_IOMAP |
| bool |
| select GENERIC_PCI_IOMAP |
| |
| config GENERIC_IO |
| bool |
| default n |
| |
| config STMP_DEVICE |
| bool |
| |
| config PERCPU_RWSEM |
| bool |
| |
| config ARCH_USE_CMPXCHG_LOCKREF |
| bool |
| |
| config ARCH_HAS_FAST_MULTIPLIER |
| bool |
| |
| config CRC_CCITT |
| tristate "CRC-CCITT functions" |
| help |
| This option is provided for the case where no in-kernel-tree |
| modules require CRC-CCITT functions, but a module built outside |
| the kernel tree does. Such modules that use library CRC-CCITT |
| functions require M here. |
| |
| config CRC16 |
| tristate "CRC16 functions" |
| help |
| This option is provided for the case where no in-kernel-tree |
| modules require CRC16 functions, but a module built outside |
| the kernel tree does. Such modules that use library CRC16 |
| functions require M here. |
| |
| config CRC_T10DIF |
| tristate "CRC calculation for the T10 Data Integrity Field" |
| select CRYPTO |
| select CRYPTO_CRCT10DIF |
| help |
| This option is only needed if a module that's not in the |
| kernel tree needs to calculate CRC checks for use with the |
| SCSI data integrity subsystem. |
| |
| config CRC_ITU_T |
| tristate "CRC ITU-T V.41 functions" |
| help |
| This option is provided for the case where no in-kernel-tree |
| modules require CRC ITU-T V.41 functions, but a module built outside |
| the kernel tree does. Such modules that use library CRC ITU-T V.41 |
| functions require M here. |
| |
| config CRC32 |
| tristate "CRC32/CRC32c functions" |
| default y |
| select BITREVERSE |
| help |
| This option is provided for the case where no in-kernel-tree |
| modules require CRC32/CRC32c functions, but a module built outside |
| the kernel tree does. Such modules that use library CRC32/CRC32c |
| functions require M here. |
| |
| config CRC32_SELFTEST |
| bool "CRC32 perform self test on init" |
| default n |
| depends on CRC32 |
| help |
| This option enables the CRC32 library functions to perform a |
| self test on initialization. The self test computes crc32_le |
| and crc32_be over byte strings with random alignment and length |
| and computes the total elapsed time and number of bytes processed. |
| |
| choice |
| prompt "CRC32 implementation" |
| depends on CRC32 |
| default CRC32_SLICEBY8 |
| help |
| This option allows a kernel builder to override the default choice |
| of CRC32 algorithm. Choose the default ("slice by 8") unless you |
| know that you need one of the others. |
| |
| config CRC32_SLICEBY8 |
| bool "Slice by 8 bytes" |
| help |
| Calculate checksum 8 bytes at a time with a clever slicing algorithm. |
| This is the fastest algorithm, but comes with a 8KiB lookup table. |
| Most modern processors have enough cache to hold this table without |
| thrashing the cache. |
| |
| This is the default implementation choice. Choose this one unless |
| you have a good reason not to. |
| |
| config CRC32_SLICEBY4 |
| bool "Slice by 4 bytes" |
| help |
| Calculate checksum 4 bytes at a time with a clever slicing algorithm. |
| This is a bit slower than slice by 8, but has a smaller 4KiB lookup |
| table. |
| |
| Only choose this option if you know what you are doing. |
| |
| config CRC32_SARWATE |
| bool "Sarwate's Algorithm (one byte at a time)" |
| help |
| Calculate checksum a byte at a time using Sarwate's algorithm. This |
| is not particularly fast, but has a small 256 byte lookup table. |
| |
| Only choose this option if you know what you are doing. |
| |
| config CRC32_BIT |
| bool "Classic Algorithm (one bit at a time)" |
| help |
| Calculate checksum one bit at a time. This is VERY slow, but has |
| no lookup table. This is provided as a debugging option. |
| |
| Only choose this option if you are debugging crc32. |
| |
| endchoice |
| |
| config CRC7 |
| tristate "CRC7 functions" |
| help |
| This option is provided for the case where no in-kernel-tree |
| modules require CRC7 functions, but a module built outside |
| the kernel tree does. Such modules that use library CRC7 |
| functions require M here. |
| |
| config LIBCRC32C |
| tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check" |
| select CRYPTO |
| select CRYPTO_CRC32C |
| help |
| This option is provided for the case where no in-kernel-tree |
| modules require CRC32c functions, but a module built outside the |
| kernel tree does. Such modules that use library CRC32c functions |
| require M here. See Castagnoli93. |
| Module will be libcrc32c. |
| |
| config CRC8 |
| tristate "CRC8 function" |
| help |
| This option provides CRC8 function. Drivers may select this |
| when they need to do cyclic redundancy check according CRC8 |
| algorithm. Module will be called crc8. |
| |
| config AUDIT_GENERIC |
| bool |
| depends on AUDIT && !AUDIT_ARCH |
| default y |
| |
| config AUDIT_ARCH_COMPAT_GENERIC |
| bool |
| default n |
| |
| config AUDIT_COMPAT_GENERIC |
| bool |
| depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT |
| default y |
| |
| config RANDOM32_SELFTEST |
| bool "PRNG perform self test on init" |
| default n |
| help |
| This option enables the 32 bit PRNG library functions to perform a |
| self test on initialization. |
| |
| # |
| # compression support is select'ed if needed |
| # |
| config 842_COMPRESS |
| tristate |
| |
| config 842_DECOMPRESS |
| tristate |
| |
| config ZLIB_INFLATE |
| tristate |
| |
| config ZLIB_DEFLATE |
| tristate |
| |
| config LZO_COMPRESS |
| tristate |
| |
| config LZO_DECOMPRESS |
| tristate |
| |
| config LZ4_COMPRESS |
| tristate |
| |
| config LZ4HC_COMPRESS |
| tristate |
| |
| config LZ4_DECOMPRESS |
| tristate |
| |
| source "lib/xz/Kconfig" |
| |
| # |
| # These all provide a common interface (hence the apparent duplication with |
| # ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.) |
| # |
| config DECOMPRESS_GZIP |
| select ZLIB_INFLATE |
| tristate |
| |
| config DECOMPRESS_BZIP2 |
| tristate |
| |
| config DECOMPRESS_LZMA |
| tristate |
| |
| config DECOMPRESS_XZ |
| select XZ_DEC |
| tristate |
| |
| config DECOMPRESS_LZO |
| select LZO_DECOMPRESS |
| tristate |
| |
| config DECOMPRESS_LZ4 |
| select LZ4_DECOMPRESS |
| tristate |
| |
| # |
| # Generic allocator support is selected if needed |
| # |
| config GENERIC_ALLOCATOR |
| bool |
| |
| # |
| # reed solomon support is select'ed if needed |
| # |
| config REED_SOLOMON |
| tristate |
| |
| config REED_SOLOMON_ENC8 |
| bool |
| |
| config REED_SOLOMON_DEC8 |
| bool |
| |
| config REED_SOLOMON_ENC16 |
| bool |
| |
| config REED_SOLOMON_DEC16 |
| bool |
| |
| # |
| # BCH support is selected if needed |
| # |
| config BCH |
| tristate |
| |
| config BCH_CONST_PARAMS |
| bool |
| help |
| Drivers may select this option to force specific constant |
| values for parameters 'm' (Galois field order) and 't' |
| (error correction capability). Those specific values must |
| be set by declaring default values for symbols BCH_CONST_M |
| and BCH_CONST_T. |
| Doing so will enable extra compiler optimizations, |
| improving encoding and decoding performance up to 2x for |
| usual (m,t) values (typically such that m*t < 200). |
| When this option is selected, the BCH library supports |
| only a single (m,t) configuration. This is mainly useful |
| for NAND flash board drivers requiring known, fixed BCH |
| parameters. |
| |
| config BCH_CONST_M |
| int |
| range 5 15 |
| help |
| Constant value for Galois field order 'm'. If 'k' is the |
| number of data bits to protect, 'm' should be chosen such |
| that (k + m*t) <= 2**m - 1. |
| Drivers should declare a default value for this symbol if |
| they select option BCH_CONST_PARAMS. |
| |
| config BCH_CONST_T |
| int |
| help |
| Constant value for error correction capability in bits 't'. |
| Drivers should declare a default value for this symbol if |
| they select option BCH_CONST_PARAMS. |
| |
| # |
| # Textsearch support is select'ed if needed |
| # |
| config TEXTSEARCH |
| bool |
| |
| config TEXTSEARCH_KMP |
| tristate |
| |
| config TEXTSEARCH_BM |
| tristate |
| |
| config TEXTSEARCH_FSM |
| tristate |
| |
| config BTREE |
| bool |
| |
| config INTERVAL_TREE |
| bool |
| help |
| Simple, embeddable, interval-tree. Can find the start of an |
| overlapping range in log(n) time and then iterate over all |
| overlapping nodes. The algorithm is implemented as an |
| augmented rbtree. |
| |
| See: |
| |
| Documentation/rbtree.txt |
| |
| for more information. |
| |
| config ASSOCIATIVE_ARRAY |
| bool |
| help |
| Generic associative array. Can be searched and iterated over whilst |
| it is being modified. It is also reasonably quick to search and |
| modify. The algorithms are non-recursive, and the trees are highly |
| capacious. |
| |
| See: |
| |
| Documentation/assoc_array.txt |
| |
| for more information. |
| |
| config HAS_IOMEM |
| bool |
| depends on !NO_IOMEM |
| select GENERIC_IO |
| default y |
| |
| config HAS_IOPORT_MAP |
| bool |
| depends on HAS_IOMEM && !NO_IOPORT_MAP |
| default y |
| |
| config HAS_DMA |
| bool |
| depends on !NO_DMA |
| default y |
| |
| config CHECK_SIGNATURE |
| bool |
| |
| config CPUMASK_OFFSTACK |
| bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS |
| help |
| Use dynamic allocation for cpumask_var_t, instead of putting |
| them on the stack. This is a bit more expensive, but avoids |
| stack overflow. |
| |
| config CPU_RMAP |
| bool |
| depends on SMP |
| |
| config DQL |
| bool |
| |
| config GLOB |
| bool |
| # This actually supports modular compilation, but the module overhead |
| # is ridiculous for the amount of code involved. Until an out-of-tree |
| # driver asks for it, we'll just link it directly it into the kernel |
| # when required. Since we're ignoring out-of-tree users, there's also |
| # no need bother prompting for a manual decision: |
| # prompt "glob_match() function" |
| help |
| This option provides a glob_match function for performing |
| simple text pattern matching. It originated in the ATA code |
| to blacklist particular drive models, but other device drivers |
| may need similar functionality. |
| |
| All drivers in the Linux kernel tree that require this function |
| should automatically select this option. Say N unless you |
| are compiling an out-of tree driver which tells you that it |
| depends on this. |
| |
| config GLOB_SELFTEST |
| bool "glob self-test on init" |
| default n |
| depends on GLOB |
| help |
| This option enables a simple self-test of the glob_match |
| function on startup. It is primarily useful for people |
| working on the code to ensure they haven't introduced any |
| regressions. |
| |
| It only adds a little bit of code and slows kernel boot (or |
| module load) by a small amount, so you're welcome to play with |
| it, but you probably don't need it. |
| |
| # |
| # Netlink attribute parsing support is select'ed if needed |
| # |
| config NLATTR |
| bool |
| |
| # |
| # Generic 64-bit atomic support is selected if needed |
| # |
| config GENERIC_ATOMIC64 |
| bool |
| |
| config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
| def_bool y if GENERIC_ATOMIC64 |
| |
| config LRU_CACHE |
| tristate |
| |
| config AVERAGE |
| bool "Averaging functions" |
| help |
| This option is provided for the case where no in-kernel-tree |
| modules require averaging functions, but a module built outside |
| the kernel tree does. Such modules that use library averaging |
| functions require Y here. |
| |
| If unsure, say N. |
| |
| config CLZ_TAB |
| bool |
| |
| config CORDIC |
| tristate "CORDIC algorithm" |
| help |
| This option provides an implementation of the CORDIC algorithm; |
| calculations are in fixed point. Module will be called cordic. |
| |
| config DDR |
| bool "JEDEC DDR data" |
| help |
| Data from JEDEC specs for DDR SDRAM memories, |
| particularly the AC timing parameters and addressing |
| information. This data is useful for drivers handling |
| DDR SDRAM controllers. |
| |
| config MPILIB |
| tristate |
| select CLZ_TAB |
| help |
| Multiprecision maths library from GnuPG. |
| It is used to implement RSA digital signature verification, |
| which is used by IMA/EVM digital signature extension. |
| |
| config SIGNATURE |
| tristate |
| depends on KEYS |
| select CRYPTO |
| select CRYPTO_SHA1 |
| select MPILIB |
| help |
| Digital signature verification. Currently only RSA is supported. |
| Implementation is done using GnuPG MPI library |
| |
| # |
| # libfdt files, only selected if needed. |
| # |
| config LIBFDT |
| bool |
| |
| config OID_REGISTRY |
| tristate |
| help |
| Enable fast lookup object identifier registry. |
| |
| config UCS2_STRING |
| tristate |
| |
| source "lib/fonts/Kconfig" |
| |
| # |
| # sg chaining option |
| # |
| |
| config ARCH_HAS_SG_CHAIN |
| def_bool n |
| |
| config ARCH_HAS_PMEM_API |
| bool |
| |
| endmenu |