[linux.git] / lib / Kconfig

#
# 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 STMP_DEVICE
	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
	tristate "CRC32 perform self test on init"
	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 CRC4
	tristate "CRC4 functions"
	help
	  This option is provided for the case where no in-kernel-tree
	  modules require CRC4 functions, but a module built outside
	  the kernel tree does. Such modules that use library CRC4
	  functions require M here.

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 XXHASH
	tristate

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
	select CRC32
	tristate

config 842_DECOMPRESS
	select CRC32
	tristate

config ZLIB_INFLATE
	tristate

config ZLIB_DEFLATE
	tristate
	select BITREVERSE

config LZO_COMPRESS
	tristate

config LZO_DECOMPRESS
	tristate

config LZ4_COMPRESS
	tristate

config LZ4HC_COMPRESS
	tristate

config LZ4_DECOMPRESS
	tristate

config ZSTD_COMPRESS
	select XXHASH
	tristate

config ZSTD_DECOMPRESS
	select XXHASH
	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 RADIX_TREE_MULTIORDER
	bool

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 SGL_ALLOC
	bool
	default n

config DMA_NOOP_OPS
	bool
	depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
	default n

config DMA_VIRT_OPS
	bool
	depends on HAS_DMA && (!64BIT || ARCH_DMA_ADDR_T_64BIT)
	default n

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
	tristate "glob self-test on init"
	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 LRU_CACHE
	tristate

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 IRQ_POLL
	bool "IRQ polling library"
	help
	  Helper library to poll interrupt mitigation using polling.

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"

config SG_SPLIT
	def_bool n
	help
	 Provides a helper to split scatterlists into chunks, each chunk being
	 a scatterlist. This should be selected by a driver or an API which
	 whishes to split a scatterlist amongst multiple DMA channels.

config SG_POOL
	def_bool n
	help
	 Provides a helper to allocate chained scatterlists. This should be
	 selected by a driver or an API which whishes to allocate chained
	 scatterlist.

#
# sg chaining option
#

config ARCH_HAS_SG_CHAIN
	def_bool n

config ARCH_HAS_PMEM_API
	bool

config ARCH_HAS_UACCESS_FLUSHCACHE
	bool

config STACKDEPOT
	bool
	select STACKTRACE

config SBITMAP
	bool

config PARMAN
	tristate "parman" if COMPILE_TEST

config PRIME_NUMBERS
	tristate

config STRING_SELFTEST
	tristate "Test string functions"

endmenu

config GENERIC_ASHLDI3
	bool

config GENERIC_ASHRDI3
	bool

config GENERIC_LSHRDI3
	bool

config GENERIC_MULDI3
	bool

config GENERIC_CMPDI2
	bool

config GENERIC_UCMPDI2
	bool
Commit	Line	Data
1da177e4 LT	1	#
	2	# Library configuration
	3	#
	4
4370aa4a LJ	5	config BINARY_PRINTF
	6	def_bool n
	7
1da177e4 LT	8	menu "Library routines"
1da177e4 LT	9
f5e70d0f DW	10	config RAID6_PQ
	11	tristate
	12
a5cfc1ec AM	13	config BITREVERSE
	14	tristate
	15
556d2f05	16	config HAVE_ARCH_BITREVERSE
841c0090	17	bool
556d2f05 YW	18	default n
	19	depends on BITREVERSE
	20	help
9e522c0d AM	21	This option enables the use of hardware bit-reversal instructions on
9e522c0d AM	22	architectures which support such operations.
556d2f05	23
8759ef32	24	config RATIONAL
6341e62b	25	bool
8759ef32	26
2922585b DM	27	config GENERIC_STRNCPY_FROM_USER
	28	bool
	29
a08c5356 LT	30	config GENERIC_STRNLEN_USER
	31	bool
	32
4cd5773a AS	33	config GENERIC_NET_UTILS
	34	bool
	35
19870def	36	config GENERIC_FIND_FIRST_BIT
9ba16087	37	bool
19870def	38
b923650b MT	39	config NO_GENERIC_PCI_IOPORT_MAP
	40	bool
	41
66eab4df MT	42	config GENERIC_PCI_IOMAP
	43	bool
	44
4673ca8e MT	45	config GENERIC_IOMAP
4673ca8e MT	46	bool
66eab4df	47	select GENERIC_PCI_IOMAP
4673ca8e	48
4ccf4bea WS	49	config STMP_DEVICE
4ccf4bea WS	50	bool
22b361d1	51
bc08b449 LT	52	config ARCH_USE_CMPXCHG_LOCKREF
	53	bool
	54
72d93104 LT	55	config ARCH_HAS_FAST_MULTIPLIER
	56	bool
	57
1da177e4 LT	58	config CRC_CCITT
	59	tristate "CRC-CCITT functions"
	60	help
	61	This option is provided for the case where no in-kernel-tree
	62	modules require CRC-CCITT functions, but a module built outside
	63	the kernel tree does. Such modules that use library CRC-CCITT
	64	functions require M here.
	65
7657ec1f EP	66	config CRC16
	67	tristate "CRC16 functions"
	68	help
	69	This option is provided for the case where no in-kernel-tree
	70	modules require CRC16 functions, but a module built outside
	71	the kernel tree does. Such modules that use library CRC16
	72	functions require M here.
	73
f11f594e MP	74	config CRC_T10DIF
f11f594e MP	75	tristate "CRC calculation for the T10 Data Integrity Field"
68411521 HX	76	select CRYPTO
68411521 HX	77	select CRYPTO_CRCT10DIF
f11f594e MP	78	help
	79	This option is only needed if a module that's not in the
	80	kernel tree needs to calculate CRC checks for use with the
	81	SCSI data integrity subsystem.
	82
3e7cbae7 ID	83	config CRC_ITU_T
	84	tristate "CRC ITU-T V.41 functions"
	85	help
	86	This option is provided for the case where no in-kernel-tree
	87	modules require CRC ITU-T V.41 functions, but a module built outside
	88	the kernel tree does. Such modules that use library CRC ITU-T V.41
	89	functions require M here.
	90
1da177e4	91	config CRC32
46c5801e	92	tristate "CRC32/CRC32c functions"
1da177e4	93	default y
906d66df	94	select BITREVERSE
1da177e4 LT	95	help
1da177e4 LT	96	This option is provided for the case where no in-kernel-tree
46c5801e DW	97	modules require CRC32/CRC32c functions, but a module built outside
	98	the kernel tree does. Such modules that use library CRC32/CRC32c
	99	functions require M here.
1da177e4	100
3863ef31	101	config CRC32_SELFTEST
5fb7f874	102	tristate "CRC32 perform self test on init"
3863ef31 BP	103	depends on CRC32
	104	help
	105	This option enables the CRC32 library functions to perform a
	106	self test on initialization. The self test computes crc32_le
	107	and crc32_be over byte strings with random alignment and length
	108	and computes the total elapsed time and number of bytes processed.
	109
5cde7656 DW	110	choice
	111	prompt "CRC32 implementation"
	112	depends on CRC32
	113	default CRC32_SLICEBY8
82edb4ba DW	114	help
	115	This option allows a kernel builder to override the default choice
	116	of CRC32 algorithm. Choose the default ("slice by 8") unless you
	117	know that you need one of the others.
5cde7656 DW	118
	119	config CRC32_SLICEBY8
	120	bool "Slice by 8 bytes"
	121	help
	122	Calculate checksum 8 bytes at a time with a clever slicing algorithm.
	123	This is the fastest algorithm, but comes with a 8KiB lookup table.
	124	Most modern processors have enough cache to hold this table without
	125	thrashing the cache.
	126
	127	This is the default implementation choice. Choose this one unless
	128	you have a good reason not to.
	129
	130	config CRC32_SLICEBY4
	131	bool "Slice by 4 bytes"
	132	help
	133	Calculate checksum 4 bytes at a time with a clever slicing algorithm.
	134	This is a bit slower than slice by 8, but has a smaller 4KiB lookup
	135	table.
	136
	137	Only choose this option if you know what you are doing.
	138
	139	config CRC32_SARWATE
	140	bool "Sarwate's Algorithm (one byte at a time)"
	141	help
	142	Calculate checksum a byte at a time using Sarwate's algorithm. This
	143	is not particularly fast, but has a small 256 byte lookup table.
	144
	145	Only choose this option if you know what you are doing.
	146
	147	config CRC32_BIT
	148	bool "Classic Algorithm (one bit at a time)"
	149	help
	150	Calculate checksum one bit at a time. This is VERY slow, but has
	151	no lookup table. This is provided as a debugging option.
	152
	153	Only choose this option if you are debugging crc32.
	154
	155	endchoice
	156
0cbaa448 JK	157	config CRC4
	158	tristate "CRC4 functions"
	159	help
	160	This option is provided for the case where no in-kernel-tree
	161	modules require CRC4 functions, but a module built outside
	162	the kernel tree does. Such modules that use library CRC4
	163	functions require M here.
	164
ad241528 JN	165	config CRC7
	166	tristate "CRC7 functions"
	167	help
	168	This option is provided for the case where no in-kernel-tree
	169	modules require CRC7 functions, but a module built outside
	170	the kernel tree does. Such modules that use library CRC7
	171	functions require M here.
	172
1da177e4 LT	173	config LIBCRC32C
1da177e4 LT	174	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
93027354	175	select CRYPTO
69c35efc	176	select CRYPTO_CRC32C
1da177e4 LT	177	help
	178	This option is provided for the case where no in-kernel-tree
	179	modules require CRC32c functions, but a module built outside the
	180	kernel tree does. Such modules that use library CRC32c functions
	181	require M here. See Castagnoli93.
	182	Module will be libcrc32c.
	183
7150962d AS	184	config CRC8
	185	tristate "CRC8 function"
	186	help
	187	This option provides CRC8 function. Drivers may select this
	188	when they need to do cyclic redundancy check according CRC8
	189	algorithm. Module will be called crc8.
	190
5d240522 NT	191	config XXHASH
	192	tristate
	193
e65e1fc2 AV	194	config AUDIT_GENERIC
	195	bool
	196	depends on AUDIT && !AUDIT_ARCH
	197	default y
	198
4b588411 AT	199	config AUDIT_ARCH_COMPAT_GENERIC
	200	bool
	201	default n
	202
	203	config AUDIT_COMPAT_GENERIC
	204	bool
	205	depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
	206	default y
	207
a6a9c0f1 DB	208	config RANDOM32_SELFTEST
	209	bool "PRNG perform self test on init"
	210	default n
	211	help
	212	This option enables the 32 bit PRNG library functions to perform a
	213	self test on initialization.
	214
1da177e4 LT	215	#
	216	# compression support is select'ed if needed
	217	#
2da572c9	218	config 842_COMPRESS
5b571677	219	select CRC32
2da572c9 DS	220	tristate
	221
	222	config 842_DECOMPRESS
5b571677	223	select CRC32
2da572c9 DS	224	tristate
2da572c9 DS	225
1da177e4 LT	226	config ZLIB_INFLATE
	227	tristate
	228
	229	config ZLIB_DEFLATE
	230	tristate
1fd4e5c3	231	select BITREVERSE
1da177e4	232
64c70b1c RP	233	config LZO_COMPRESS
	234	tristate
	235
	236	config LZO_DECOMPRESS
	237	tristate
	238
c72ac7a1 CM	239	config LZ4_COMPRESS
	240	tristate
	241
	242	config LZ4HC_COMPRESS
	243	tristate
	244
e76e1fdf KL	245	config LZ4_DECOMPRESS
	246	tristate
	247
73f3d1b4 NT	248	config ZSTD_COMPRESS
	249	select XXHASH
	250	tristate
	251
	252	config ZSTD_DECOMPRESS
	253	select XXHASH
	254	tristate
	255
24fa0402 LC	256	source "lib/xz/Kconfig"
24fa0402 LC	257
c8531ab3 PA	258	#
	259	# These all provide a common interface (hence the apparent duplication with
	260	# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
	261	#
	262	config DECOMPRESS_GZIP
7856a16e	263	select ZLIB_INFLATE
c8531ab3 PA	264	tristate
	265
	266	config DECOMPRESS_BZIP2
	267	tristate
	268
	269	config DECOMPRESS_LZMA
	270	tristate
	271
3ebe1243 LC	272	config DECOMPRESS_XZ
	273	select XZ_DEC
	274	tristate
	275
cacb246f AT	276	config DECOMPRESS_LZO
	277	select LZO_DECOMPRESS
	278	tristate
	279
e76e1fdf KL	280	config DECOMPRESS_LZ4
	281	select LZ4_DECOMPRESS
	282	tristate
	283
f14f75b8 JS	284	#
	285	# Generic allocator support is selected if needed
	286	#
	287	config GENERIC_ALLOCATOR
6341e62b	288	bool
f14f75b8	289
1da177e4 LT	290	#
	291	# reed solomon support is select'ed if needed
	292	#
	293	config REED_SOLOMON
	294	tristate
	295
	296	config REED_SOLOMON_ENC8
6341e62b	297	bool
1da177e4 LT	298
1da177e4 LT	299	config REED_SOLOMON_DEC8
6341e62b	300	bool
1da177e4 LT	301
1da177e4 LT	302	config REED_SOLOMON_ENC16
6341e62b	303	bool
1da177e4 LT	304
1da177e4 LT	305	config REED_SOLOMON_DEC16
6341e62b	306	bool
1da177e4	307
437aa565 ID	308	#
	309	# BCH support is selected if needed
	310	#
	311	config BCH
	312	tristate
	313
	314	config BCH_CONST_PARAMS
6341e62b	315	bool
437aa565 ID	316	help
	317	Drivers may select this option to force specific constant
	318	values for parameters 'm' (Galois field order) and 't'
	319	(error correction capability). Those specific values must
	320	be set by declaring default values for symbols BCH_CONST_M
	321	and BCH_CONST_T.
	322	Doing so will enable extra compiler optimizations,
	323	improving encoding and decoding performance up to 2x for
	324	usual (m,t) values (typically such that m*t < 200).
	325	When this option is selected, the BCH library supports
	326	only a single (m,t) configuration. This is mainly useful
	327	for NAND flash board drivers requiring known, fixed BCH
	328	parameters.
	329
	330	config BCH_CONST_M
	331	int
	332	range 5 15
	333	help
	334	Constant value for Galois field order 'm'. If 'k' is the
	335	number of data bits to protect, 'm' should be chosen such
	336	that (k + mt) <= 2*m - 1.
	337	Drivers should declare a default value for this symbol if
	338	they select option BCH_CONST_PARAMS.
	339
	340	config BCH_CONST_T
	341	int
	342	help
	343	Constant value for error correction capability in bits 't'.
	344	Drivers should declare a default value for this symbol if
	345	they select option BCH_CONST_PARAMS.
	346
f7704347 DM	347	#
	348	# Textsearch support is select'ed if needed
	349	#
2de4ff7b	350	config TEXTSEARCH
6341e62b	351	bool
1da177e4	352
df3fb93a	353	config TEXTSEARCH_KMP
f7704347	354	tristate
df3fb93a	355
8082e4ed	356	config TEXTSEARCH_BM
29cb9f9c	357	tristate
8082e4ed	358
6408f79c	359	config TEXTSEARCH_FSM
f7704347	360	tristate
6408f79c	361
5db53f3e	362	config BTREE
6341e62b	363	bool
5db53f3e	364
a88cc108	365	config INTERVAL_TREE
6341e62b	366	bool
a88cc108 CW	367	help
	368	Simple, embeddable, interval-tree. Can find the start of an
	369	overlapping range in log(n) time and then iterate over all
	370	overlapping nodes. The algorithm is implemented as an
	371	augmented rbtree.
	372
	373	See:
	374
	375	Documentation/rbtree.txt
	376
	377	for more information.
	378
57578c2e MW	379	config RADIX_TREE_MULTIORDER
	380	bool
	381
3cb98950 DH	382	config ASSOCIATIVE_ARRAY
	383	bool
	384	help
	385	Generic associative array. Can be searched and iterated over whilst
	386	it is being modified. It is also reasonably quick to search and
	387	modify. The algorithms are non-recursive, and the trees are highly
	388	capacious.
	389
	390	See:
	391
	392	Documentation/assoc_array.txt
	393
	394	for more information.
	395
5ea81769	396	config HAS_IOMEM
6341e62b	397	bool
5ea81769	398	depends on !NO_IOMEM
087fafd1	399	select GENERIC_IO
5ea81769 AV	400	default y
5ea81769 AV	401
ce816fa8	402	config HAS_IOPORT_MAP
6341e62b	403	bool
ce816fa8	404	depends on HAS_IOMEM && !NO_IOPORT_MAP
ee36c2bf AV	405	default y
ee36c2bf AV	406
411f0f3e	407	config HAS_DMA
6341e62b	408	bool
411f0f3e HC	409	depends on !NO_DMA
	410	default y
	411
e80a0af4 BVA	412	config SGL_ALLOC
	413	bool
	414	default n
	415
7844572c BVA	416	config DMA_NOOP_OPS
	417	bool
	418	depends on HAS_DMA && (!64BIT \|\| ARCH_DMA_ADDR_T_64BIT)
	419	default n
	420
551199ac BVA	421	config DMA_VIRT_OPS
	422	bool
	423	depends on HAS_DMA && (!64BIT \|\| ARCH_DMA_ADDR_T_64BIT)
	424	default n
	425
928923c7 GU	426	config CHECK_SIGNATURE
	427	bool
	428
aab46da0 RR	429	config CPUMASK_OFFSTACK
	430	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
	431	help
	432	Use dynamic allocation for cpumask_var_t, instead of putting
	433	them on the stack. This is a bit more expensive, but avoids
	434	stack overflow.
	435
c39649c3 BH	436	config CPU_RMAP
	437	bool
	438	depends on SMP
	439
75957ba3 TH	440	config DQL
	441	bool
	442
b0125085 GS	443	config GLOB
	444	bool
	445	# This actually supports modular compilation, but the module overhead
	446	# is ridiculous for the amount of code involved. Until an out-of-tree
	447	# driver asks for it, we'll just link it directly it into the kernel
	448	# when required. Since we're ignoring out-of-tree users, there's also
	449	# no need bother prompting for a manual decision:
	450	# prompt "glob_match() function"
	451	help
	452	This option provides a glob_match function for performing
	453	simple text pattern matching. It originated in the ATA code
	454	to blacklist particular drive models, but other device drivers
	455	may need similar functionality.
	456
	457	All drivers in the Linux kernel tree that require this function
	458	should automatically select this option. Say N unless you
	459	are compiling an out-of tree driver which tells you that it
	460	depends on this.
	461
5f9be824	462	config GLOB_SELFTEST
ba95b045	463	tristate "glob self-test on init"
5f9be824 GS	464	depends on GLOB
	465	help
	466	This option enables a simple self-test of the glob_match
	467	function on startup. It is primarily useful for people
	468	working on the code to ensure they haven't introduced any
	469	regressions.
	470
	471	It only adds a little bit of code and slows kernel boot (or
	472	module load) by a small amount, so you're welcome to play with
	473	it, but you probably don't need it.
	474
e9cc8bdd GU	475	#
	476	# Netlink attribute parsing support is select'ed if needed
	477	#
	478	config NLATTR
	479	bool
	480
09d4e0ed PM	481	#
	482	# Generic 64-bit atomic support is selected if needed
	483	#
	484	config GENERIC_ATOMIC64
	485	bool
	486
b411b363 PR	487	config LRU_CACHE
	488	tristate
	489
c6df4b17 DM	490	config CLZ_TAB
	491	bool
	492
10f8113e	493	config CORDIC
d89ce936	494	tristate "CORDIC algorithm"
10f8113e	495	help
435a95c5 MW	496	This option provides an implementation of the CORDIC algorithm;
435a95c5 MW	497	calculations are in fixed point. Module will be called cordic.
10f8113e	498
9c1c21a0 A	499	config DDR
	500	bool "JEDEC DDR data"
	501	help
	502	Data from JEDEC specs for DDR SDRAM memories,
	503	particularly the AC timing parameters and addressing
	504	information. This data is useful for drivers handling
	505	DDR SDRAM controllers.
	506
511cbce2 CH	507	config IRQ_POLL
	508	bool "IRQ polling library"
	509	help
	510	Helper library to poll interrupt mitigation using polling.
	511
d9c46b18	512	config MPILIB
2e5f094b	513	tristate
c6df4b17	514	select CLZ_TAB
d9c46b18 DK	515	help
	516	Multiprecision maths library from GnuPG.
	517	It is used to implement RSA digital signature verification,
	518	which is used by IMA/EVM digital signature extension.
	519
5e8898e9	520	config SIGNATURE
2e5f094b	521	tristate
0d1f64f6 DK	522	depends on KEYS
0d1f64f6 DK	523	select CRYPTO
be440ec7	524	select CRYPTO_SHA1
051dbb91 DK	525	select MPILIB
	526	help
	527	Digital signature verification. Currently only RSA is supported.
	528	Implementation is done using GnuPG MPI library
	529
ab253839 DD	530	#
	531	# libfdt files, only selected if needed.
	532	#
	533	config LIBFDT
	534	bool
	535
a77ad6ea DH	536	config OID_REGISTRY
	537	tristate
	538	help
	539	Enable fast lookup object identifier registry.
	540
0635eb8a MG	541	config UCS2_STRING
	542	tristate
	543
ee89bd6b GU	544	source "lib/fonts/Kconfig"
ee89bd6b GU	545
f8bcbe62 RJ	546	config SG_SPLIT
	547	def_bool n
	548	help
7f7e92f7 GU	549	Provides a helper to split scatterlists into chunks, each chunk being
	550	a scatterlist. This should be selected by a driver or an API which
	551	whishes to split a scatterlist amongst multiple DMA channels.
f8bcbe62	552
9b1d6c89 ML	553	config SG_POOL
	554	def_bool n
	555	help
	556	Provides a helper to allocate chained scatterlists. This should be
	557	selected by a driver or an API which whishes to allocate chained
	558	scatterlist.
	559
308c09f1 LA	560	#
	561	# sg chaining option
	562	#
	563
	564	config ARCH_HAS_SG_CHAIN
	565	def_bool n
	566
61031952 RZ	567	config ARCH_HAS_PMEM_API
	568	bool
	569
0aed55af DW	570	config ARCH_HAS_UACCESS_FLUSHCACHE
	571	bool
	572
cd11016e AP	573	config STACKDEPOT
	574	bool
	575	select STACKTRACE
	576
88459642 OS	577	config SBITMAP
	578	bool
	579
44091d29	580	config PARMAN
9d25af69	581	tristate "parman" if COMPILE_TEST
44091d29	582
cf4a7207	583	config PRIME_NUMBERS
64a57719	584	tristate
cf4a7207	585
03270c13	586	config STRING_SELFTEST
d6b28e09	587	tristate "Test string functions"
03270c13	588
2de4ff7b	589	endmenu
b35cd988 PD	590
	591	config GENERIC_ASHLDI3
	592	bool
	593
	594	config GENERIC_ASHRDI3
	595	bool
	596
	597	config GENERIC_LSHRDI3
	598	bool
	599
	600	config GENERIC_MULDI3
	601	bool
	602
	603	config GENERIC_CMPDI2
	604	bool
	605
	606	config GENERIC_UCMPDI2
	607	bool