xref: /openbmc/linux/lib/Kconfig (revision c72ac7a1)
1#
2# Library configuration
3#
4
5config BINARY_PRINTF
6	def_bool n
7
8menu "Library routines"
9
10config RAID6_PQ
11	tristate
12
13config BITREVERSE
14	tristate
15
16config RATIONAL
17	boolean
18
19config GENERIC_STRNCPY_FROM_USER
20	bool
21
22config GENERIC_STRNLEN_USER
23	bool
24
25config GENERIC_NET_UTILS
26	bool
27
28config GENERIC_FIND_FIRST_BIT
29	bool
30
31config NO_GENERIC_PCI_IOPORT_MAP
32	bool
33
34config GENERIC_PCI_IOMAP
35	bool
36
37config GENERIC_IOMAP
38	bool
39	select GENERIC_PCI_IOMAP
40
41config GENERIC_IO
42	boolean
43	default n
44
45config STMP_DEVICE
46	bool
47
48config PERCPU_RWSEM
49	boolean
50
51config 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
59config 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
67config CRC_T10DIF
68	tristate "CRC calculation for the T10 Data Integrity Field"
69	select CRYPTO
70	select CRYPTO_CRCT10DIF
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
76config 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
84config CRC32
85	tristate "CRC32/CRC32c functions"
86	default y
87	select BITREVERSE
88	help
89	  This option is provided for the case where no in-kernel-tree
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.
93
94config 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
104choice
105	prompt "CRC32 implementation"
106	depends on CRC32
107	default CRC32_SLICEBY8
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.
112
113config 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
124config 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
133config 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
141config 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
149endchoice
150
151config 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
159config LIBCRC32C
160	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
161	select CRYPTO
162	select CRYPTO_CRC32C
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
170config 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
177config AUDIT_GENERIC
178	bool
179	depends on AUDIT && !AUDIT_ARCH
180	default y
181
182#
183# compression support is select'ed if needed
184#
185config ZLIB_INFLATE
186	tristate
187
188config ZLIB_DEFLATE
189	tristate
190
191config LZO_COMPRESS
192	tristate
193
194config LZO_DECOMPRESS
195	tristate
196
197config LZ4_COMPRESS
198	tristate
199
200config LZ4HC_COMPRESS
201	tristate
202
203config LZ4_DECOMPRESS
204	tristate
205
206source "lib/xz/Kconfig"
207
208#
209# These all provide a common interface (hence the apparent duplication with
210# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
211#
212config DECOMPRESS_GZIP
213	select ZLIB_INFLATE
214	tristate
215
216config DECOMPRESS_BZIP2
217	tristate
218
219config DECOMPRESS_LZMA
220	tristate
221
222config DECOMPRESS_XZ
223	select XZ_DEC
224	tristate
225
226config DECOMPRESS_LZO
227	select LZO_DECOMPRESS
228	tristate
229
230config DECOMPRESS_LZ4
231	select LZ4_DECOMPRESS
232	tristate
233
234#
235# Generic allocator support is selected if needed
236#
237config GENERIC_ALLOCATOR
238	boolean
239
240#
241# reed solomon support is select'ed if needed
242#
243config REED_SOLOMON
244	tristate
245
246config REED_SOLOMON_ENC8
247	boolean
248
249config REED_SOLOMON_DEC8
250	boolean
251
252config REED_SOLOMON_ENC16
253	boolean
254
255config REED_SOLOMON_DEC16
256	boolean
257
258#
259# BCH support is selected if needed
260#
261config BCH
262	tristate
263
264config BCH_CONST_PARAMS
265	boolean
266	help
267	  Drivers may select this option to force specific constant
268	  values for parameters 'm' (Galois field order) and 't'
269	  (error correction capability). Those specific values must
270	  be set by declaring default values for symbols BCH_CONST_M
271	  and BCH_CONST_T.
272	  Doing so will enable extra compiler optimizations,
273	  improving encoding and decoding performance up to 2x for
274	  usual (m,t) values (typically such that m*t < 200).
275	  When this option is selected, the BCH library supports
276	  only a single (m,t) configuration. This is mainly useful
277	  for NAND flash board drivers requiring known, fixed BCH
278	  parameters.
279
280config BCH_CONST_M
281	int
282	range 5 15
283	help
284	  Constant value for Galois field order 'm'. If 'k' is the
285	  number of data bits to protect, 'm' should be chosen such
286	  that (k + m*t) <= 2**m - 1.
287	  Drivers should declare a default value for this symbol if
288	  they select option BCH_CONST_PARAMS.
289
290config BCH_CONST_T
291	int
292	help
293	  Constant value for error correction capability in bits 't'.
294	  Drivers should declare a default value for this symbol if
295	  they select option BCH_CONST_PARAMS.
296
297#
298# Textsearch support is select'ed if needed
299#
300config TEXTSEARCH
301	boolean
302
303config TEXTSEARCH_KMP
304	tristate
305
306config TEXTSEARCH_BM
307	tristate
308
309config TEXTSEARCH_FSM
310	tristate
311
312config BTREE
313	boolean
314
315config HAS_IOMEM
316	boolean
317	depends on !NO_IOMEM
318	select GENERIC_IO
319	default y
320
321config HAS_IOPORT
322	boolean
323	depends on HAS_IOMEM && !NO_IOPORT
324	default y
325
326config HAS_DMA
327	boolean
328	depends on !NO_DMA
329	default y
330
331config CHECK_SIGNATURE
332	bool
333
334config CPUMASK_OFFSTACK
335	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
336	help
337	  Use dynamic allocation for cpumask_var_t, instead of putting
338	  them on the stack.  This is a bit more expensive, but avoids
339	  stack overflow.
340
341config DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
342       bool "Disable obsolete cpumask functions" if DEBUG_PER_CPU_MAPS
343       depends on BROKEN
344
345config CPU_RMAP
346	bool
347	depends on SMP
348
349config DQL
350	bool
351
352#
353# Netlink attribute parsing support is select'ed if needed
354#
355config NLATTR
356	bool
357
358#
359# Generic 64-bit atomic support is selected if needed
360#
361config GENERIC_ATOMIC64
362       bool
363
364config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
365	def_bool y if GENERIC_ATOMIC64
366
367config LRU_CACHE
368	tristate
369
370config AVERAGE
371	bool "Averaging functions"
372	help
373	  This option is provided for the case where no in-kernel-tree
374	  modules require averaging functions, but a module built outside
375	  the kernel tree does. Such modules that use library averaging
376	  functions require Y here.
377
378	  If unsure, say N.
379
380config CLZ_TAB
381	bool
382
383config CORDIC
384	tristate "CORDIC algorithm"
385	help
386	  This option provides an implementation of the CORDIC algorithm;
387	  calculations are in fixed point. Module will be called cordic.
388
389config DDR
390	bool "JEDEC DDR data"
391	help
392	  Data from JEDEC specs for DDR SDRAM memories,
393	  particularly the AC timing parameters and addressing
394	  information. This data is useful for drivers handling
395	  DDR SDRAM controllers.
396
397config MPILIB
398	tristate
399	select CLZ_TAB
400	help
401	  Multiprecision maths library from GnuPG.
402	  It is used to implement RSA digital signature verification,
403	  which is used by IMA/EVM digital signature extension.
404
405config SIGNATURE
406	tristate
407	depends on KEYS && CRYPTO
408	select CRYPTO_SHA1
409	select MPILIB
410	help
411	  Digital signature verification. Currently only RSA is supported.
412	  Implementation is done using GnuPG MPI library
413
414#
415# libfdt files, only selected if needed.
416#
417config LIBFDT
418	bool
419
420config OID_REGISTRY
421	tristate
422	help
423	  Enable fast lookup object identifier registry.
424
425config UCS2_STRING
426        tristate
427
428source "lib/fonts/Kconfig"
429
430endmenu
431