[thirdparty/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_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
	boolean
	default n

config STMP_DEVICE
	bool

config PERCPU_RWSEM
	boolean

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

#
# 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_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
	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
	select GENERIC_IO
	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 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 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 && 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"

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
2922585b DM	19	config GENERIC_STRNCPY_FROM_USER
	20	bool
	21
a08c5356 LT	22	config GENERIC_STRNLEN_USER
	23	bool
	24
4cd5773a AS	25	config GENERIC_NET_UTILS
	26	bool
	27
19870def	28	config GENERIC_FIND_FIRST_BIT
9ba16087	29	bool
19870def	30
b923650b MT	31	config NO_GENERIC_PCI_IOPORT_MAP
	32	bool
	33
66eab4df MT	34	config GENERIC_PCI_IOMAP
	35	bool
	36
4673ca8e MT	37	config GENERIC_IOMAP
4673ca8e MT	38	bool
66eab4df	39	select GENERIC_PCI_IOMAP
4673ca8e	40
087fafd1 RW	41	config GENERIC_IO
	42	boolean
	43	default n
	44
4ccf4bea WS	45	config STMP_DEVICE
	46	bool
	47
22b361d1 ON	48	config PERCPU_RWSEM
	49	boolean
	50
1da177e4 LT	51	config CRC_CCITT
	52	tristate "CRC-CCITT functions"
	53	help
	54	This option is provided for the case where no in-kernel-tree
	55	modules require CRC-CCITT functions, but a module built outside
	56	the kernel tree does. Such modules that use library CRC-CCITT
	57	functions require M here.
	58
7657ec1f EP	59	config CRC16
	60	tristate "CRC16 functions"
	61	help
	62	This option is provided for the case where no in-kernel-tree
	63	modules require CRC16 functions, but a module built outside
	64	the kernel tree does. Such modules that use library CRC16
	65	functions require M here.
	66
f11f594e MP	67	config CRC_T10DIF
f11f594e MP	68	tristate "CRC calculation for the T10 Data Integrity Field"
2d31e518 TC	69	select CRYPTO
2d31e518 TC	70	select CRYPTO_CRCT10DIF
f11f594e MP	71	help
	72	This option is only needed if a module that's not in the
	73	kernel tree needs to calculate CRC checks for use with the
	74	SCSI data integrity subsystem.
	75
3e7cbae7 ID	76	config CRC_ITU_T
	77	tristate "CRC ITU-T V.41 functions"
	78	help
	79	This option is provided for the case where no in-kernel-tree
	80	modules require CRC ITU-T V.41 functions, but a module built outside
	81	the kernel tree does. Such modules that use library CRC ITU-T V.41
	82	functions require M here.
	83
1da177e4	84	config CRC32
46c5801e	85	tristate "CRC32/CRC32c functions"
1da177e4	86	default y
906d66df	87	select BITREVERSE
1da177e4 LT	88	help
1da177e4 LT	89	This option is provided for the case where no in-kernel-tree
46c5801e DW	90	modules require CRC32/CRC32c functions, but a module built outside
	91	the kernel tree does. Such modules that use library CRC32/CRC32c
	92	functions require M here.
1da177e4	93
3863ef31 BP	94	config CRC32_SELFTEST
	95	bool "CRC32 perform self test on init"
	96	default n
	97	depends on CRC32
	98	help
	99	This option enables the CRC32 library functions to perform a
	100	self test on initialization. The self test computes crc32_le
	101	and crc32_be over byte strings with random alignment and length
	102	and computes the total elapsed time and number of bytes processed.
	103
5cde7656 DW	104	choice
	105	prompt "CRC32 implementation"
	106	depends on CRC32
	107	default CRC32_SLICEBY8
82edb4ba DW	108	help
	109	This option allows a kernel builder to override the default choice
	110	of CRC32 algorithm. Choose the default ("slice by 8") unless you
	111	know that you need one of the others.
5cde7656 DW	112
	113	config CRC32_SLICEBY8
	114	bool "Slice by 8 bytes"
	115	help
	116	Calculate checksum 8 bytes at a time with a clever slicing algorithm.
	117	This is the fastest algorithm, but comes with a 8KiB lookup table.
	118	Most modern processors have enough cache to hold this table without
	119	thrashing the cache.
	120
	121	This is the default implementation choice. Choose this one unless
	122	you have a good reason not to.
	123
	124	config CRC32_SLICEBY4
	125	bool "Slice by 4 bytes"
	126	help
	127	Calculate checksum 4 bytes at a time with a clever slicing algorithm.
	128	This is a bit slower than slice by 8, but has a smaller 4KiB lookup
	129	table.
	130
	131	Only choose this option if you know what you are doing.
	132
	133	config CRC32_SARWATE
	134	bool "Sarwate's Algorithm (one byte at a time)"
	135	help
	136	Calculate checksum a byte at a time using Sarwate's algorithm. This
	137	is not particularly fast, but has a small 256 byte lookup table.
	138
	139	Only choose this option if you know what you are doing.
	140
	141	config CRC32_BIT
	142	bool "Classic Algorithm (one bit at a time)"
	143	help
	144	Calculate checksum one bit at a time. This is VERY slow, but has
	145	no lookup table. This is provided as a debugging option.
	146
	147	Only choose this option if you are debugging crc32.
	148
	149	endchoice
	150
ad241528 JN	151	config CRC7
	152	tristate "CRC7 functions"
	153	help
	154	This option is provided for the case where no in-kernel-tree
	155	modules require CRC7 functions, but a module built outside
	156	the kernel tree does. Such modules that use library CRC7
	157	functions require M here.
	158
1da177e4 LT	159	config LIBCRC32C
1da177e4 LT	160	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
93027354	161	select CRYPTO
69c35efc	162	select CRYPTO_CRC32C
1da177e4 LT	163	help
	164	This option is provided for the case where no in-kernel-tree
	165	modules require CRC32c functions, but a module built outside the
	166	kernel tree does. Such modules that use library CRC32c functions
	167	require M here. See Castagnoli93.
	168	Module will be libcrc32c.
	169
7150962d AS	170	config CRC8
	171	tristate "CRC8 function"
	172	help
	173	This option provides CRC8 function. Drivers may select this
	174	when they need to do cyclic redundancy check according CRC8
	175	algorithm. Module will be called crc8.
	176
e65e1fc2 AV	177	config AUDIT_GENERIC
	178	bool
	179	depends on AUDIT && !AUDIT_ARCH
	180	default y
	181
1da177e4 LT	182	#
	183	# compression support is select'ed if needed
	184	#
	185	config ZLIB_INFLATE
	186	tristate
	187
	188	config ZLIB_DEFLATE
	189	tristate
	190
64c70b1c RP	191	config LZO_COMPRESS
	192	tristate
	193
	194	config LZO_DECOMPRESS
	195	tristate
	196
e76e1fdf KL	197	config LZ4_DECOMPRESS
	198	tristate
	199
24fa0402 LC	200	source "lib/xz/Kconfig"
24fa0402 LC	201
c8531ab3 PA	202	#
	203	# These all provide a common interface (hence the apparent duplication with
	204	# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
	205	#
	206	config DECOMPRESS_GZIP
7856a16e	207	select ZLIB_INFLATE
c8531ab3 PA	208	tristate
	209
	210	config DECOMPRESS_BZIP2
	211	tristate
	212
	213	config DECOMPRESS_LZMA
	214	tristate
	215
3ebe1243 LC	216	config DECOMPRESS_XZ
	217	select XZ_DEC
	218	tristate
	219
cacb246f AT	220	config DECOMPRESS_LZO
	221	select LZO_DECOMPRESS
	222	tristate
	223
e76e1fdf KL	224	config DECOMPRESS_LZ4
	225	select LZ4_DECOMPRESS
	226	tristate
	227
f14f75b8 JS	228	#
	229	# Generic allocator support is selected if needed
	230	#
	231	config GENERIC_ALLOCATOR
	232	boolean
	233
1da177e4 LT	234	#
	235	# reed solomon support is select'ed if needed
	236	#
	237	config REED_SOLOMON
	238	tristate
	239
	240	config REED_SOLOMON_ENC8
	241	boolean
	242
	243	config REED_SOLOMON_DEC8
	244	boolean
	245
	246	config REED_SOLOMON_ENC16
	247	boolean
	248
	249	config REED_SOLOMON_DEC16
	250	boolean
	251
437aa565 ID	252	#
	253	# BCH support is selected if needed
	254	#
	255	config BCH
	256	tristate
	257
	258	config BCH_CONST_PARAMS
	259	boolean
	260	help
	261	Drivers may select this option to force specific constant
	262	values for parameters 'm' (Galois field order) and 't'
	263	(error correction capability). Those specific values must
	264	be set by declaring default values for symbols BCH_CONST_M
	265	and BCH_CONST_T.
	266	Doing so will enable extra compiler optimizations,
	267	improving encoding and decoding performance up to 2x for
	268	usual (m,t) values (typically such that m*t < 200).
	269	When this option is selected, the BCH library supports
	270	only a single (m,t) configuration. This is mainly useful
	271	for NAND flash board drivers requiring known, fixed BCH
	272	parameters.
	273
	274	config BCH_CONST_M
	275	int
	276	range 5 15
	277	help
	278	Constant value for Galois field order 'm'. If 'k' is the
	279	number of data bits to protect, 'm' should be chosen such
	280	that (k + mt) <= 2*m - 1.
	281	Drivers should declare a default value for this symbol if
	282	they select option BCH_CONST_PARAMS.
	283
	284	config BCH_CONST_T
	285	int
	286	help
	287	Constant value for error correction capability in bits 't'.
	288	Drivers should declare a default value for this symbol if
	289	they select option BCH_CONST_PARAMS.
	290
f7704347 DM	291	#
	292	# Textsearch support is select'ed if needed
	293	#
2de4ff7b	294	config TEXTSEARCH
f7704347	295	boolean
1da177e4	296
df3fb93a	297	config TEXTSEARCH_KMP
f7704347	298	tristate
df3fb93a	299
8082e4ed	300	config TEXTSEARCH_BM
29cb9f9c	301	tristate
8082e4ed	302
6408f79c	303	config TEXTSEARCH_FSM
f7704347	304	tristate
6408f79c	305
5db53f3e JE	306	config BTREE
	307	boolean
	308
5ea81769	309	config HAS_IOMEM
ee36c2bf	310	boolean
5ea81769	311	depends on !NO_IOMEM
087fafd1	312	select GENERIC_IO
5ea81769 AV	313	default y
	314
	315	config HAS_IOPORT
	316	boolean
	317	depends on HAS_IOMEM && !NO_IOPORT
ee36c2bf AV	318	default y
ee36c2bf AV	319
411f0f3e HC	320	config HAS_DMA
	321	boolean
	322	depends on !NO_DMA
	323	default y
	324
928923c7 GU	325	config CHECK_SIGNATURE
	326	bool
	327
aab46da0 RR	328	config CPUMASK_OFFSTACK
	329	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
	330	help
	331	Use dynamic allocation for cpumask_var_t, instead of putting
	332	them on the stack. This is a bit more expensive, but avoids
	333	stack overflow.
	334
8c384cde RR	335	config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
8c384cde RR	336	bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
525c1f92	337	depends on BROKEN
8c384cde	338
c39649c3 BH	339	config CPU_RMAP
	340	bool
	341	depends on SMP
	342
75957ba3 TH	343	config DQL
	344	bool
	345
e9cc8bdd GU	346	#
	347	# Netlink attribute parsing support is select'ed if needed
	348	#
	349	config NLATTR
	350	bool
	351
09d4e0ed PM	352	#
	353	# Generic 64-bit atomic support is selected if needed
	354	#
	355	config GENERIC_ATOMIC64
	356	bool
	357
7463449b CM	358	config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
	359	def_bool y if GENERIC_ATOMIC64
	360
b411b363 PR	361	config LRU_CACHE
	362	tristate
	363
c5485a7e	364	config AVERAGE
a7a9a24d MB	365	bool "Averaging functions"
	366	help
	367	This option is provided for the case where no in-kernel-tree
	368	modules require averaging functions, but a module built outside
	369	the kernel tree does. Such modules that use library averaging
	370	functions require Y here.
	371
	372	If unsure, say N.
c5485a7e	373
c6df4b17 DM	374	config CLZ_TAB
	375	bool
	376
10f8113e	377	config CORDIC
d89ce936	378	tristate "CORDIC algorithm"
10f8113e	379	help
435a95c5 MW	380	This option provides an implementation of the CORDIC algorithm;
435a95c5 MW	381	calculations are in fixed point. Module will be called cordic.
10f8113e	382
9c1c21a0 A	383	config DDR
	384	bool "JEDEC DDR data"
	385	help
	386	Data from JEDEC specs for DDR SDRAM memories,
	387	particularly the AC timing parameters and addressing
	388	information. This data is useful for drivers handling
	389	DDR SDRAM controllers.
	390
d9c46b18	391	config MPILIB
2e5f094b	392	tristate
c6df4b17	393	select CLZ_TAB
d9c46b18 DK	394	help
	395	Multiprecision maths library from GnuPG.
	396	It is used to implement RSA digital signature verification,
	397	which is used by IMA/EVM digital signature extension.
	398
5e8898e9	399	config SIGNATURE
2e5f094b	400	tristate
be440ec7 DK	401	depends on KEYS && CRYPTO
be440ec7 DK	402	select CRYPTO_SHA1
051dbb91 DK	403	select MPILIB
	404	help
	405	Digital signature verification. Currently only RSA is supported.
	406	Implementation is done using GnuPG MPI library
	407
ab253839 DD	408	#
	409	# libfdt files, only selected if needed.
	410	#
	411	config LIBFDT
	412	bool
	413
a77ad6ea DH	414	config OID_REGISTRY
	415	tristate
	416	help
	417	Enable fast lookup object identifier registry.
	418
0635eb8a MG	419	config UCS2_STRING
	420	tristate
	421
ee89bd6b GU	422	source "lib/fonts/Kconfig"
ee89bd6b GU	423
2de4ff7b	424	endmenu