[deliverable/linux.git] / lib / Kconfig

#
# Library configuration
#

config BINARY_PRINTF
	def_bool n

menu "Library routines"

config RAID6_PQ
	tristate

config BITREVERSE
	tristate

config RATIONAL
	boolean

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 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"
	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

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

#
# compression support is select'ed if needed
#
config ZLIB_INFLATE
	tristate

config ZLIB_DEFLATE
	tristate

config LZO_COMPRESS
	tristate

config LZO_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

#
# Generic allocator support is selected if needed
#
config GENERIC_ALLOCATOR
	boolean

#
# reed solomon support is select'ed if needed
#
config REED_SOLOMON
	tristate
	
config REED_SOLOMON_ENC8
	boolean

config REED_SOLOMON_DEC8
	boolean

config REED_SOLOMON_ENC16
	boolean

config REED_SOLOMON_DEC16
	boolean

#
# BCH support is selected if needed
#
config BCH
	tristate

config BCH_CONST_PARAMS
	boolean
	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
	boolean

config TEXTSEARCH_KMP
	tristate

config TEXTSEARCH_BM
	tristate

config TEXTSEARCH_FSM
	tristate

config BTREE
	boolean

config HAS_IOMEM
	boolean
	depends on !NO_IOMEM
	default y

config HAS_IOPORT
	boolean
	depends on HAS_IOMEM && !NO_IOPORT
	default y

config HAS_DMA
	boolean
	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 DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
       bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
       depends on EXPERIMENTAL && BROKEN

config CPU_RMAP
	bool
	depends on SMP

config DQL
	bool

#
# 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 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 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 MPILIB_EXTRA
	bool
	depends on MPILIB
	help
	  Additional sources of multiprecision maths library from GnuPG.
	  This code is unnecessary for RSA digital signature verification,
	  but can be compiled if needed.

config SIGNATURE
	tristate
	depends on KEYS && CRYPTO
	select CRYPTO_SHA1
	select MPILIB
	help
	  Digital signature verification. Currently only RSA is supported.
	  Implementation is done using GnuPG MPI library

endmenu
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
8759ef32 OS	16	config RATIONAL
	17	boolean
	18
19870def	19	config GENERIC_FIND_FIRST_BIT
9ba16087	20	bool
19870def	21
b923650b MT	22	config NO_GENERIC_PCI_IOPORT_MAP
	23	bool
	24
66eab4df MT	25	config GENERIC_PCI_IOMAP
	26	bool
	27
4673ca8e MT	28	config GENERIC_IOMAP
4673ca8e MT	29	bool
66eab4df	30	select GENERIC_PCI_IOMAP
4673ca8e	31
1da177e4 LT	32	config CRC_CCITT
	33	tristate "CRC-CCITT functions"
	34	help
	35	This option is provided for the case where no in-kernel-tree
	36	modules require CRC-CCITT functions, but a module built outside
	37	the kernel tree does. Such modules that use library CRC-CCITT
	38	functions require M here.
	39
7657ec1f EP	40	config CRC16
	41	tristate "CRC16 functions"
	42	help
	43	This option is provided for the case where no in-kernel-tree
	44	modules require CRC16 functions, but a module built outside
	45	the kernel tree does. Such modules that use library CRC16
	46	functions require M here.
	47
f11f594e MP	48	config CRC_T10DIF
	49	tristate "CRC calculation for the T10 Data Integrity Field"
	50	help
	51	This option is only needed if a module that's not in the
	52	kernel tree needs to calculate CRC checks for use with the
	53	SCSI data integrity subsystem.
	54
3e7cbae7 ID	55	config CRC_ITU_T
	56	tristate "CRC ITU-T V.41 functions"
	57	help
	58	This option is provided for the case where no in-kernel-tree
	59	modules require CRC ITU-T V.41 functions, but a module built outside
	60	the kernel tree does. Such modules that use library CRC ITU-T V.41
	61	functions require M here.
	62
1da177e4	63	config CRC32
46c5801e	64	tristate "CRC32/CRC32c functions"
1da177e4	65	default y
906d66df	66	select BITREVERSE
1da177e4 LT	67	help
1da177e4 LT	68	This option is provided for the case where no in-kernel-tree
46c5801e DW	69	modules require CRC32/CRC32c functions, but a module built outside
	70	the kernel tree does. Such modules that use library CRC32/CRC32c
	71	functions require M here.
1da177e4	72
3863ef31 BP	73	config CRC32_SELFTEST
	74	bool "CRC32 perform self test on init"
	75	default n
	76	depends on CRC32
	77	help
	78	This option enables the CRC32 library functions to perform a
	79	self test on initialization. The self test computes crc32_le
	80	and crc32_be over byte strings with random alignment and length
	81	and computes the total elapsed time and number of bytes processed.
	82
5cde7656 DW	83	choice
	84	prompt "CRC32 implementation"
	85	depends on CRC32
	86	default CRC32_SLICEBY8
	87
	88	config CRC32_SLICEBY8
	89	bool "Slice by 8 bytes"
	90	help
	91	Calculate checksum 8 bytes at a time with a clever slicing algorithm.
	92	This is the fastest algorithm, but comes with a 8KiB lookup table.
	93	Most modern processors have enough cache to hold this table without
	94	thrashing the cache.
	95
	96	This is the default implementation choice. Choose this one unless
	97	you have a good reason not to.
	98
	99	config CRC32_SLICEBY4
	100	bool "Slice by 4 bytes"
	101	help
	102	Calculate checksum 4 bytes at a time with a clever slicing algorithm.
	103	This is a bit slower than slice by 8, but has a smaller 4KiB lookup
	104	table.
	105
	106	Only choose this option if you know what you are doing.
	107
	108	config CRC32_SARWATE
	109	bool "Sarwate's Algorithm (one byte at a time)"
	110	help
	111	Calculate checksum a byte at a time using Sarwate's algorithm. This
	112	is not particularly fast, but has a small 256 byte lookup table.
	113
	114	Only choose this option if you know what you are doing.
	115
	116	config CRC32_BIT
	117	bool "Classic Algorithm (one bit at a time)"
	118	help
	119	Calculate checksum one bit at a time. This is VERY slow, but has
	120	no lookup table. This is provided as a debugging option.
	121
	122	Only choose this option if you are debugging crc32.
	123
	124	endchoice
	125
ad241528 JN	126	config CRC7
	127	tristate "CRC7 functions"
	128	help
	129	This option is provided for the case where no in-kernel-tree
	130	modules require CRC7 functions, but a module built outside
	131	the kernel tree does. Such modules that use library CRC7
	132	functions require M here.
	133
1da177e4 LT	134	config LIBCRC32C
1da177e4 LT	135	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
93027354	136	select CRYPTO
69c35efc	137	select CRYPTO_CRC32C
1da177e4 LT	138	help
	139	This option is provided for the case where no in-kernel-tree
	140	modules require CRC32c functions, but a module built outside the
	141	kernel tree does. Such modules that use library CRC32c functions
	142	require M here. See Castagnoli93.
	143	Module will be libcrc32c.
	144
7150962d AS	145	config CRC8
	146	tristate "CRC8 function"
	147	help
	148	This option provides CRC8 function. Drivers may select this
	149	when they need to do cyclic redundancy check according CRC8
	150	algorithm. Module will be called crc8.
	151
e65e1fc2 AV	152	config AUDIT_GENERIC
	153	bool
	154	depends on AUDIT && !AUDIT_ARCH
	155	default y
	156
1da177e4 LT	157	#
	158	# compression support is select'ed if needed
	159	#
	160	config ZLIB_INFLATE
	161	tristate
	162
	163	config ZLIB_DEFLATE
	164	tristate
	165
64c70b1c RP	166	config LZO_COMPRESS
	167	tristate
	168
	169	config LZO_DECOMPRESS
	170	tristate
	171
24fa0402 LC	172	source "lib/xz/Kconfig"
24fa0402 LC	173
c8531ab3 PA	174	#
	175	# These all provide a common interface (hence the apparent duplication with
	176	# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
	177	#
	178	config DECOMPRESS_GZIP
7856a16e	179	select ZLIB_INFLATE
c8531ab3 PA	180	tristate
	181
	182	config DECOMPRESS_BZIP2
	183	tristate
	184
	185	config DECOMPRESS_LZMA
	186	tristate
	187
3ebe1243 LC	188	config DECOMPRESS_XZ
	189	select XZ_DEC
	190	tristate
	191
cacb246f AT	192	config DECOMPRESS_LZO
	193	select LZO_DECOMPRESS
	194	tristate
	195
f14f75b8 JS	196	#
	197	# Generic allocator support is selected if needed
	198	#
	199	config GENERIC_ALLOCATOR
	200	boolean
	201
1da177e4 LT	202	#
	203	# reed solomon support is select'ed if needed
	204	#
	205	config REED_SOLOMON
	206	tristate
	207
	208	config REED_SOLOMON_ENC8
	209	boolean
	210
	211	config REED_SOLOMON_DEC8
	212	boolean
	213
	214	config REED_SOLOMON_ENC16
	215	boolean
	216
	217	config REED_SOLOMON_DEC16
	218	boolean
	219
437aa565 ID	220	#
	221	# BCH support is selected if needed
	222	#
	223	config BCH
	224	tristate
	225
	226	config BCH_CONST_PARAMS
	227	boolean
	228	help
	229	Drivers may select this option to force specific constant
	230	values for parameters 'm' (Galois field order) and 't'
	231	(error correction capability). Those specific values must
	232	be set by declaring default values for symbols BCH_CONST_M
	233	and BCH_CONST_T.
	234	Doing so will enable extra compiler optimizations,
	235	improving encoding and decoding performance up to 2x for
	236	usual (m,t) values (typically such that m*t < 200).
	237	When this option is selected, the BCH library supports
	238	only a single (m,t) configuration. This is mainly useful
	239	for NAND flash board drivers requiring known, fixed BCH
	240	parameters.
	241
	242	config BCH_CONST_M
	243	int
	244	range 5 15
	245	help
	246	Constant value for Galois field order 'm'. If 'k' is the
	247	number of data bits to protect, 'm' should be chosen such
	248	that (k + mt) <= 2*m - 1.
	249	Drivers should declare a default value for this symbol if
	250	they select option BCH_CONST_PARAMS.
	251
	252	config BCH_CONST_T
	253	int
	254	help
	255	Constant value for error correction capability in bits 't'.
	256	Drivers should declare a default value for this symbol if
	257	they select option BCH_CONST_PARAMS.
	258
f7704347 DM	259	#
	260	# Textsearch support is select'ed if needed
	261	#
2de4ff7b	262	config TEXTSEARCH
f7704347	263	boolean
1da177e4	264
df3fb93a	265	config TEXTSEARCH_KMP
f7704347	266	tristate
df3fb93a	267
8082e4ed	268	config TEXTSEARCH_BM
29cb9f9c	269	tristate
8082e4ed	270
6408f79c	271	config TEXTSEARCH_FSM
f7704347	272	tristate
6408f79c	273
5db53f3e JE	274	config BTREE
	275	boolean
	276
5ea81769	277	config HAS_IOMEM
ee36c2bf	278	boolean
5ea81769 AV	279	depends on !NO_IOMEM
	280	default y
	281
	282	config HAS_IOPORT
	283	boolean
	284	depends on HAS_IOMEM && !NO_IOPORT
ee36c2bf AV	285	default y
ee36c2bf AV	286
411f0f3e HC	287	config HAS_DMA
	288	boolean
	289	depends on !NO_DMA
	290	default y
	291
928923c7 GU	292	config CHECK_SIGNATURE
	293	bool
	294
aab46da0 RR	295	config CPUMASK_OFFSTACK
	296	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
	297	help
	298	Use dynamic allocation for cpumask_var_t, instead of putting
	299	them on the stack. This is a bit more expensive, but avoids
	300	stack overflow.
	301
8c384cde RR	302	config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
	303	bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
	304	depends on EXPERIMENTAL && BROKEN
	305
c39649c3 BH	306	config CPU_RMAP
	307	bool
	308	depends on SMP
	309
75957ba3 TH	310	config DQL
	311	bool
	312
e9cc8bdd GU	313	#
	314	# Netlink attribute parsing support is select'ed if needed
	315	#
	316	config NLATTR
	317	bool
	318
09d4e0ed PM	319	#
	320	# Generic 64-bit atomic support is selected if needed
	321	#
	322	config GENERIC_ATOMIC64
	323	bool
	324
b411b363 PR	325	config LRU_CACHE
	326	tristate
	327
c5485a7e	328	config AVERAGE
a7a9a24d MB	329	bool "Averaging functions"
	330	help
	331	This option is provided for the case where no in-kernel-tree
	332	modules require averaging functions, but a module built outside
	333	the kernel tree does. Such modules that use library averaging
	334	functions require Y here.
	335
	336	If unsure, say N.
c5485a7e	337
c6df4b17 DM	338	config CLZ_TAB
	339	bool
	340
10f8113e	341	config CORDIC
d89ce936	342	tristate "CORDIC algorithm"
10f8113e	343	help
435a95c5 MW	344	This option provides an implementation of the CORDIC algorithm;
435a95c5 MW	345	calculations are in fixed point. Module will be called cordic.
10f8113e	346
d9c46b18	347	config MPILIB
2e5f094b	348	tristate
c6df4b17	349	select CLZ_TAB
d9c46b18 DK	350	help
	351	Multiprecision maths library from GnuPG.
	352	It is used to implement RSA digital signature verification,
	353	which is used by IMA/EVM digital signature extension.
	354
7e8dec91	355	config MPILIB_EXTRA
2e5f094b	356	bool
7e8dec91 DK	357	depends on MPILIB
7e8dec91 DK	358	help
68adcad5 DK	359	Additional sources of multiprecision maths library from GnuPG.
	360	This code is unnecessary for RSA digital signature verification,
	361	but can be compiled if needed.
7e8dec91	362
5e8898e9	363	config SIGNATURE
2e5f094b	364	tristate
be440ec7 DK	365	depends on KEYS && CRYPTO
be440ec7 DK	366	select CRYPTO_SHA1
051dbb91 DK	367	select MPILIB
	368	help
	369	Digital signature verification. Currently only RSA is supported.
	370	Implementation is done using GnuPG MPI library
	371
2de4ff7b	372	endmenu