diff options
Diffstat (limited to 'kernel/lib/Kconfig')
| -rw-r--r-- | kernel/lib/Kconfig | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/kernel/lib/Kconfig b/kernel/lib/Kconfig new file mode 100644 index 000000000..8689649d5 --- /dev/null +++ b/kernel/lib/Kconfig @@ -0,0 +1,526 @@ +# +# 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 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 + depends on !PREEMPT_RT_FULL + 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 + +endmenu |