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 HAVE_ARCH_BITREVERSE
 17	bool
 18	default n
 19	depends on BITREVERSE
 20	help
 21	  This option enables the use of hardware bit-reversal instructions on
 22	  architectures which support such operations.
 23
 24config RATIONAL
 25	bool
 26
 27config GENERIC_STRNCPY_FROM_USER
 28	bool
 29
 
 
 
 30config GENERIC_STRNLEN_USER
 31	bool
 32
 33config GENERIC_NET_UTILS
 34	bool
 35
 36config GENERIC_FIND_FIRST_BIT
 37	bool
 38
 39config NO_GENERIC_PCI_IOPORT_MAP
 40	bool
 41
 42config GENERIC_PCI_IOMAP
 43	bool
 44
 45config GENERIC_IOMAP
 46	bool
 47	select GENERIC_PCI_IOMAP
 48
 49config GENERIC_IO
 50	bool
 51	default n
 52
 53config STMP_DEVICE
 54	bool
 55
 56config ARCH_USE_CMPXCHG_LOCKREF
 57	bool
 58
 59config ARCH_HAS_FAST_MULTIPLIER
 60	bool
 61
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 62config CRC_CCITT
 63	tristate "CRC-CCITT functions"
 64	help
 65	  This option is provided for the case where no in-kernel-tree
 66	  modules require CRC-CCITT functions, but a module built outside
 67	  the kernel tree does. Such modules that use library CRC-CCITT
 68	  functions require M here.
 69
 70config CRC16
 71	tristate "CRC16 functions"
 72	help
 73	  This option is provided for the case where no in-kernel-tree
 74	  modules require CRC16 functions, but a module built outside
 75	  the kernel tree does. Such modules that use library CRC16
 76	  functions require M here.
 77
 78config CRC_T10DIF
 79	tristate "CRC calculation for the T10 Data Integrity Field"
 80	select CRYPTO
 81	select CRYPTO_CRCT10DIF
 82	help
 83	  This option is only needed if a module that's not in the
 84	  kernel tree needs to calculate CRC checks for use with the
 85	  SCSI data integrity subsystem.
 86
 
 
 
 
 
 
 
 
 
 87config CRC_ITU_T
 88	tristate "CRC ITU-T V.41 functions"
 89	help
 90	  This option is provided for the case where no in-kernel-tree
 91	  modules require CRC ITU-T V.41 functions, but a module built outside
 92	  the kernel tree does. Such modules that use library CRC ITU-T V.41
 93	  functions require M here.
 94
 95config CRC32
 96	tristate "CRC32/CRC32c functions"
 97	default y
 98	select BITREVERSE
 99	help
100	  This option is provided for the case where no in-kernel-tree
101	  modules require CRC32/CRC32c functions, but a module built outside
102	  the kernel tree does. Such modules that use library CRC32/CRC32c
103	  functions require M here.
104
105config CRC32_SELFTEST
106	bool "CRC32 perform self test on init"
107	default n
108	depends on CRC32
109	help
110	  This option enables the CRC32 library functions to perform a
111	  self test on initialization. The self test computes crc32_le
112	  and crc32_be over byte strings with random alignment and length
113	  and computes the total elapsed time and number of bytes processed.
114
115choice
116	prompt "CRC32 implementation"
117	depends on CRC32
118	default CRC32_SLICEBY8
119	help
120	  This option allows a kernel builder to override the default choice
121	  of CRC32 algorithm.  Choose the default ("slice by 8") unless you
122	  know that you need one of the others.
123
124config CRC32_SLICEBY8
125	bool "Slice by 8 bytes"
126	help
127	  Calculate checksum 8 bytes at a time with a clever slicing algorithm.
128	  This is the fastest algorithm, but comes with a 8KiB lookup table.
129	  Most modern processors have enough cache to hold this table without
130	  thrashing the cache.
131
132	  This is the default implementation choice.  Choose this one unless
133	  you have a good reason not to.
134
135config CRC32_SLICEBY4
136	bool "Slice by 4 bytes"
137	help
138	  Calculate checksum 4 bytes at a time with a clever slicing algorithm.
139	  This is a bit slower than slice by 8, but has a smaller 4KiB lookup
140	  table.
141
142	  Only choose this option if you know what you are doing.
143
144config CRC32_SARWATE
145	bool "Sarwate's Algorithm (one byte at a time)"
146	help
147	  Calculate checksum a byte at a time using Sarwate's algorithm.  This
148	  is not particularly fast, but has a small 256 byte lookup table.
149
150	  Only choose this option if you know what you are doing.
151
152config CRC32_BIT
153	bool "Classic Algorithm (one bit at a time)"
154	help
155	  Calculate checksum one bit at a time.  This is VERY slow, but has
156	  no lookup table.  This is provided as a debugging option.
157
158	  Only choose this option if you are debugging crc32.
159
160endchoice
161
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
162config CRC7
163	tristate "CRC7 functions"
164	help
165	  This option is provided for the case where no in-kernel-tree
166	  modules require CRC7 functions, but a module built outside
167	  the kernel tree does. Such modules that use library CRC7
168	  functions require M here.
169
170config LIBCRC32C
171	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
172	select CRYPTO
173	select CRYPTO_CRC32C
174	help
175	  This option is provided for the case where no in-kernel-tree
176	  modules require CRC32c functions, but a module built outside the
177	  kernel tree does. Such modules that use library CRC32c functions
178	  require M here.  See Castagnoli93.
179	  Module will be libcrc32c.
180
181config CRC8
182	tristate "CRC8 function"
183	help
184	  This option provides CRC8 function. Drivers may select this
185	  when they need to do cyclic redundancy check according CRC8
186	  algorithm. Module will be called crc8.
187
 
 
 
188config AUDIT_GENERIC
189	bool
190	depends on AUDIT && !AUDIT_ARCH
191	default y
192
193config AUDIT_ARCH_COMPAT_GENERIC
194	bool
195	default n
196
197config AUDIT_COMPAT_GENERIC
198	bool
199	depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
200	default y
201
202config RANDOM32_SELFTEST
203	bool "PRNG perform self test on init"
204	default n
205	help
206	  This option enables the 32 bit PRNG library functions to perform a
207	  self test on initialization.
208
209#
210# compression support is select'ed if needed
211#
212config 842_COMPRESS
213	select CRC32
214	tristate
215
216config 842_DECOMPRESS
217	select CRC32
218	tristate
219
220config ZLIB_INFLATE
221	tristate
222
223config ZLIB_DEFLATE
224	tristate
225	select BITREVERSE
226
 
 
 
 
 
 
 
227config LZO_COMPRESS
228	tristate
229
230config LZO_DECOMPRESS
231	tristate
232
233config LZ4_COMPRESS
234	tristate
235
236config LZ4HC_COMPRESS
237	tristate
238
239config LZ4_DECOMPRESS
240	tristate
241
 
 
 
 
 
 
 
 
 
 
 
 
242source "lib/xz/Kconfig"
243
244#
245# These all provide a common interface (hence the apparent duplication with
246# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
247#
248config DECOMPRESS_GZIP
249	select ZLIB_INFLATE
250	tristate
251
252config DECOMPRESS_BZIP2
253	tristate
254
255config DECOMPRESS_LZMA
256	tristate
257
258config DECOMPRESS_XZ
259	select XZ_DEC
260	tristate
261
262config DECOMPRESS_LZO
263	select LZO_DECOMPRESS
264	tristate
265
266config DECOMPRESS_LZ4
267	select LZ4_DECOMPRESS
268	tristate
269
 
 
 
 
270#
271# Generic allocator support is selected if needed
272#
273config GENERIC_ALLOCATOR
274	bool
275
276#
277# reed solomon support is select'ed if needed
278#
279config REED_SOLOMON
280	tristate
281	
282config REED_SOLOMON_ENC8
283	bool
284
285config REED_SOLOMON_DEC8
286	bool
287
288config REED_SOLOMON_ENC16
289	bool
290
291config REED_SOLOMON_DEC16
292	bool
293
294#
295# BCH support is selected if needed
296#
297config BCH
298	tristate
299
300config BCH_CONST_PARAMS
301	bool
302	help
303	  Drivers may select this option to force specific constant
304	  values for parameters 'm' (Galois field order) and 't'
305	  (error correction capability). Those specific values must
306	  be set by declaring default values for symbols BCH_CONST_M
307	  and BCH_CONST_T.
308	  Doing so will enable extra compiler optimizations,
309	  improving encoding and decoding performance up to 2x for
310	  usual (m,t) values (typically such that m*t < 200).
311	  When this option is selected, the BCH library supports
312	  only a single (m,t) configuration. This is mainly useful
313	  for NAND flash board drivers requiring known, fixed BCH
314	  parameters.
315
316config BCH_CONST_M
317	int
318	range 5 15
319	help
320	  Constant value for Galois field order 'm'. If 'k' is the
321	  number of data bits to protect, 'm' should be chosen such
322	  that (k + m*t) <= 2**m - 1.
323	  Drivers should declare a default value for this symbol if
324	  they select option BCH_CONST_PARAMS.
325
326config BCH_CONST_T
327	int
328	help
329	  Constant value for error correction capability in bits 't'.
330	  Drivers should declare a default value for this symbol if
331	  they select option BCH_CONST_PARAMS.
332
333#
334# Textsearch support is select'ed if needed
335#
336config TEXTSEARCH
337	bool
338
339config TEXTSEARCH_KMP
340	tristate
341
342config TEXTSEARCH_BM
343	tristate
344
345config TEXTSEARCH_FSM
346	tristate
347
348config BTREE
349	bool
350
351config INTERVAL_TREE
352	bool
353	help
354	  Simple, embeddable, interval-tree. Can find the start of an
355	  overlapping range in log(n) time and then iterate over all
356	  overlapping nodes. The algorithm is implemented as an
357	  augmented rbtree.
358
359	  See:
360
361		Documentation/rbtree.txt
362
363	  for more information.
364
 
 
 
 
 
 
 
 
 
 
365config ASSOCIATIVE_ARRAY
366	bool
367	help
368	  Generic associative array.  Can be searched and iterated over whilst
369	  it is being modified.  It is also reasonably quick to search and
370	  modify.  The algorithms are non-recursive, and the trees are highly
371	  capacious.
372
373	  See:
374
375		Documentation/assoc_array.txt
376
377	  for more information.
378
379config HAS_IOMEM
380	bool
381	depends on !NO_IOMEM
382	select GENERIC_IO
383	default y
384
385config HAS_IOPORT_MAP
386	bool
387	depends on HAS_IOMEM && !NO_IOPORT_MAP
388	default y
389
390config HAS_DMA
 
 
 
 
 
 
391	bool
392	depends on !NO_DMA
393	default y
394
395config CHECK_SIGNATURE
396	bool
397
398config CPUMASK_OFFSTACK
399	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
400	help
401	  Use dynamic allocation for cpumask_var_t, instead of putting
402	  them on the stack.  This is a bit more expensive, but avoids
403	  stack overflow.
404
 
 
 
 
 
 
 
 
 
405config CPU_RMAP
406	bool
407	depends on SMP
408
409config DQL
410	bool
411
412config GLOB
413	bool
414#	This actually supports modular compilation, but the module overhead
415#	is ridiculous for the amount of code involved.	Until an out-of-tree
416#	driver asks for it, we'll just link it directly it into the kernel
417#	when required.  Since we're ignoring out-of-tree users,	there's also
418#	no need bother prompting for a manual decision:
419#	prompt "glob_match() function"
420	help
421	  This option provides a glob_match function for performing
422	  simple text pattern matching.  It originated in the ATA code
423	  to blacklist particular drive models, but other device drivers
424	  may need similar functionality.
425
426	  All drivers in the Linux kernel tree that require this function
427	  should automatically select this option.  Say N unless you
428	  are compiling an out-of tree driver which tells you that it
429	  depends on this.
430
431config GLOB_SELFTEST
432	bool "glob self-test on init"
433	default n
434	depends on GLOB
435	help
436	  This option enables a simple self-test of the glob_match
437	  function on startup.	It is primarily useful for people
438	  working on the code to ensure they haven't introduced any
439	  regressions.
440
441	  It only adds a little bit of code and slows kernel boot (or
442	  module load) by a small amount, so you're welcome to play with
443	  it, but you probably don't need it.
444
445#
446# Netlink attribute parsing support is select'ed if needed
447#
448config NLATTR
449	bool
450
451#
452# Generic 64-bit atomic support is selected if needed
453#
454config GENERIC_ATOMIC64
455       bool
456
457config ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
458	def_bool y if GENERIC_ATOMIC64
459
460config LRU_CACHE
461	tristate
462
463config CLZ_TAB
464	bool
465
466config CORDIC
467	tristate "CORDIC algorithm"
468	help
469	  This option provides an implementation of the CORDIC algorithm;
470	  calculations are in fixed point. Module will be called cordic.
471
472config DDR
473	bool "JEDEC DDR data"
474	help
475	  Data from JEDEC specs for DDR SDRAM memories,
476	  particularly the AC timing parameters and addressing
477	  information. This data is useful for drivers handling
478	  DDR SDRAM controllers.
479
480config IRQ_POLL
481	bool "IRQ polling library"
482	help
483	  Helper library to poll interrupt mitigation using polling.
484
485config MPILIB
486	tristate
487	select CLZ_TAB
488	help
489	  Multiprecision maths library from GnuPG.
490	  It is used to implement RSA digital signature verification,
491	  which is used by IMA/EVM digital signature extension.
492
493config SIGNATURE
494	tristate
495	depends on KEYS
496	select CRYPTO
497	select CRYPTO_SHA1
498	select MPILIB
499	help
500	  Digital signature verification. Currently only RSA is supported.
501	  Implementation is done using GnuPG MPI library
502
 
 
 
 
 
 
 
503#
504# libfdt files, only selected if needed.
505#
506config LIBFDT
507	bool
508
509config OID_REGISTRY
510	tristate
511	help
512	  Enable fast lookup object identifier registry.
513
514config UCS2_STRING
515        tristate
 
 
 
 
 
516
517source "lib/fonts/Kconfig"
518
519config SG_SPLIT
520	def_bool n
521	help
522	 Provides a helper to split scatterlists into chunks, each chunk being
523	 a scatterlist. This should be selected by a driver or an API which
524	 whishes to split a scatterlist amongst multiple DMA channels.
525
 
 
 
 
 
 
 
526#
527# sg chaining option
528#
529
530config ARCH_HAS_SG_CHAIN
531	def_bool n
532
533config ARCH_HAS_PMEM_API
534	bool
535
536config ARCH_HAS_MMIO_FLUSH
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
537	bool
538
 
 
 
 
539config STACKDEPOT
540	bool
541	select STACKTRACE
542
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
543endmenu

  1# SPDX-License-Identifier: GPL-2.0-only
  2#
  3# Library configuration
  4#
  5
  6config BINARY_PRINTF
  7	def_bool n
  8
  9menu "Library routines"
 10
 11config RAID6_PQ
 12	tristate
 13
 14config RAID6_PQ_BENCHMARK
 15	bool "Automatically choose fastest RAID6 PQ functions"
 16	depends on RAID6_PQ
 17	default y
 18	help
 19	  Benchmark all available RAID6 PQ functions on init and choose the
 20	  fastest one.
 21
 22config LINEAR_RANGES
 23	tristate
 24
 25config PACKING
 26	bool "Generic bitfield packing and unpacking"
 27	select BITREVERSE
 28	default n
 29	help
 30	  This option provides the packing() helper function, which permits
 31	  converting bitfields between a CPU-usable representation and a
 32	  memory representation that can have any combination of these quirks:
 33	    - Is little endian (bytes are reversed within a 32-bit group)
 34	    - The least-significant 32-bit word comes first (within a 64-bit
 35	      group)
 36	    - The most significant bit of a byte is at its right (bit 0 of a
 37	      register description is numerically 2^7).
 38	  Drivers may use these helpers to match the bit indices as described
 39	  in the data sheets of the peripherals they are in control of.
 40
 41	  When in doubt, say N.
 42
 43config BITREVERSE
 44	tristate
 45
 46config HAVE_ARCH_BITREVERSE
 47	bool
 48	default n
 
 49	help
 50	  This option enables the use of hardware bit-reversal instructions on
 51	  architectures which support such operations.
 52
 53config ARCH_HAS_STRNCPY_FROM_USER
 54	bool
 55
 56config ARCH_HAS_STRNLEN_USER
 57	bool
 58
 59config GENERIC_STRNCPY_FROM_USER
 60	def_bool !ARCH_HAS_STRNCPY_FROM_USER
 61
 62config GENERIC_STRNLEN_USER
 63	def_bool !ARCH_HAS_STRNLEN_USER
 64
 65config GENERIC_NET_UTILS
 66	bool
 67
 68source "lib/math/Kconfig"
 
 69
 70config NO_GENERIC_PCI_IOPORT_MAP
 71	bool
 72
 73config GENERIC_PCI_IOMAP
 74	bool
 75
 76config GENERIC_IOMAP
 77	bool
 78	select GENERIC_PCI_IOMAP
 79
 
 
 
 
 80config STMP_DEVICE
 81	bool
 82
 83config ARCH_USE_CMPXCHG_LOCKREF
 84	bool
 85
 86config ARCH_HAS_FAST_MULTIPLIER
 87	bool
 88
 89config ARCH_USE_SYM_ANNOTATIONS
 90	bool
 91
 92config INDIRECT_PIO
 93	bool "Access I/O in non-MMIO mode"
 94	depends on ARM64
 95	help
 96	  On some platforms where no separate I/O space exists, there are I/O
 97	  hosts which can not be accessed in MMIO mode. Using the logical PIO
 98	  mechanism, the host-local I/O resource can be mapped into system
 99	  logic PIO space shared with MMIO hosts, such as PCI/PCIe, then the
100	  system can access the I/O devices with the mapped-logic PIO through
101	  I/O accessors.
102
103	  This way has relatively little I/O performance cost. Please make
104	  sure your devices really need this configure item enabled.
105
106	  When in doubt, say N.
107
108config INDIRECT_IOMEM
109	bool
110	help
111	  This is selected by other options/architectures to provide the
112	  emulated iomem accessors.
113
114config INDIRECT_IOMEM_FALLBACK
115	bool
116	depends on INDIRECT_IOMEM
117	help
118	  If INDIRECT_IOMEM is selected, this enables falling back to plain
119	  mmio accesses when the IO memory address is not a registered
120	  emulated region.
121
122config TRACE_MMIO_ACCESS
123	bool "Register read/write tracing"
124	depends on TRACING && ARCH_HAVE_TRACE_MMIO_ACCESS
125	help
126	  Create tracepoints for MMIO read/write operations. These trace events
127	  can be used for logging all MMIO read/write operations.
128
129source "lib/crypto/Kconfig"
130
131config CRC_CCITT
132	tristate "CRC-CCITT functions"
133	help
134	  This option is provided for the case where no in-kernel-tree
135	  modules require CRC-CCITT functions, but a module built outside
136	  the kernel tree does. Such modules that use library CRC-CCITT
137	  functions require M here.
138
139config CRC16
140	tristate "CRC16 functions"
141	help
142	  This option is provided for the case where no in-kernel-tree
143	  modules require CRC16 functions, but a module built outside
144	  the kernel tree does. Such modules that use library CRC16
145	  functions require M here.
146
147config CRC_T10DIF
148	tristate "CRC calculation for the T10 Data Integrity Field"
149	select CRYPTO
150	select CRYPTO_CRCT10DIF
151	help
152	  This option is only needed if a module that's not in the
153	  kernel tree needs to calculate CRC checks for use with the
154	  SCSI data integrity subsystem.
155
156config CRC64_ROCKSOFT
157	tristate "CRC calculation for the Rocksoft model CRC64"
158	select CRC64
159	select CRYPTO
160	select CRYPTO_CRC64_ROCKSOFT
161	help
162	  This option provides a CRC64 API to a registered crypto driver.
163	  This is used with the block layer's data integrity subsystem.
164
165config CRC_ITU_T
166	tristate "CRC ITU-T V.41 functions"
167	help
168	  This option is provided for the case where no in-kernel-tree
169	  modules require CRC ITU-T V.41 functions, but a module built outside
170	  the kernel tree does. Such modules that use library CRC ITU-T V.41
171	  functions require M here.
172
173config CRC32
174	tristate "CRC32/CRC32c functions"
175	default y
176	select BITREVERSE
177	help
178	  This option is provided for the case where no in-kernel-tree
179	  modules require CRC32/CRC32c functions, but a module built outside
180	  the kernel tree does. Such modules that use library CRC32/CRC32c
181	  functions require M here.
182
183config CRC32_SELFTEST
184	tristate "CRC32 perform self test on init"
 
185	depends on CRC32
186	help
187	  This option enables the CRC32 library functions to perform a
188	  self test on initialization. The self test computes crc32_le
189	  and crc32_be over byte strings with random alignment and length
190	  and computes the total elapsed time and number of bytes processed.
191
192choice
193	prompt "CRC32 implementation"
194	depends on CRC32
195	default CRC32_SLICEBY8
196	help
197	  This option allows a kernel builder to override the default choice
198	  of CRC32 algorithm.  Choose the default ("slice by 8") unless you
199	  know that you need one of the others.
200
201config CRC32_SLICEBY8
202	bool "Slice by 8 bytes"
203	help
204	  Calculate checksum 8 bytes at a time with a clever slicing algorithm.
205	  This is the fastest algorithm, but comes with a 8KiB lookup table.
206	  Most modern processors have enough cache to hold this table without
207	  thrashing the cache.
208
209	  This is the default implementation choice.  Choose this one unless
210	  you have a good reason not to.
211
212config CRC32_SLICEBY4
213	bool "Slice by 4 bytes"
214	help
215	  Calculate checksum 4 bytes at a time with a clever slicing algorithm.
216	  This is a bit slower than slice by 8, but has a smaller 4KiB lookup
217	  table.
218
219	  Only choose this option if you know what you are doing.
220
221config CRC32_SARWATE
222	bool "Sarwate's Algorithm (one byte at a time)"
223	help
224	  Calculate checksum a byte at a time using Sarwate's algorithm.  This
225	  is not particularly fast, but has a small 256 byte lookup table.
226
227	  Only choose this option if you know what you are doing.
228
229config CRC32_BIT
230	bool "Classic Algorithm (one bit at a time)"
231	help
232	  Calculate checksum one bit at a time.  This is VERY slow, but has
233	  no lookup table.  This is provided as a debugging option.
234
235	  Only choose this option if you are debugging crc32.
236
237endchoice
238
239config CRC64
240	tristate "CRC64 functions"
241	help
242	  This option is provided for the case where no in-kernel-tree
243	  modules require CRC64 functions, but a module built outside
244	  the kernel tree does. Such modules that use library CRC64
245	  functions require M here.
246
247config CRC4
248	tristate "CRC4 functions"
249	help
250	  This option is provided for the case where no in-kernel-tree
251	  modules require CRC4 functions, but a module built outside
252	  the kernel tree does. Such modules that use library CRC4
253	  functions require M here.
254
255config CRC7
256	tristate "CRC7 functions"
257	help
258	  This option is provided for the case where no in-kernel-tree
259	  modules require CRC7 functions, but a module built outside
260	  the kernel tree does. Such modules that use library CRC7
261	  functions require M here.
262
263config LIBCRC32C
264	tristate "CRC32c (Castagnoli, et al) Cyclic Redundancy-Check"
265	select CRYPTO
266	select CRYPTO_CRC32C
267	help
268	  This option is provided for the case where no in-kernel-tree
269	  modules require CRC32c functions, but a module built outside the
270	  kernel tree does. Such modules that use library CRC32c functions
271	  require M here.  See Castagnoli93.
272	  Module will be libcrc32c.
273
274config CRC8
275	tristate "CRC8 function"
276	help
277	  This option provides CRC8 function. Drivers may select this
278	  when they need to do cyclic redundancy check according CRC8
279	  algorithm. Module will be called crc8.
280
281config XXHASH
282	tristate
283
284config AUDIT_GENERIC
285	bool
286	depends on AUDIT && !AUDIT_ARCH
287	default y
288
289config AUDIT_ARCH_COMPAT_GENERIC
290	bool
291	default n
292
293config AUDIT_COMPAT_GENERIC
294	bool
295	depends on AUDIT_GENERIC && AUDIT_ARCH_COMPAT_GENERIC && COMPAT
296	default y
297
298config RANDOM32_SELFTEST
299	bool "PRNG perform self test on init"
 
300	help
301	  This option enables the 32 bit PRNG library functions to perform a
302	  self test on initialization.
303
304#
305# compression support is select'ed if needed
306#
307config 842_COMPRESS
308	select CRC32
309	tristate
310
311config 842_DECOMPRESS
312	select CRC32
313	tristate
314
315config ZLIB_INFLATE
316	tristate
317
318config ZLIB_DEFLATE
319	tristate
320	select BITREVERSE
321
322config ZLIB_DFLTCC
323	def_bool y
324	depends on S390
325	prompt "Enable s390x DEFLATE CONVERSION CALL support for kernel zlib"
326	help
327	 Enable s390x hardware support for zlib in the kernel.
328
329config LZO_COMPRESS
330	tristate
331
332config LZO_DECOMPRESS
333	tristate
334
335config LZ4_COMPRESS
336	tristate
337
338config LZ4HC_COMPRESS
339	tristate
340
341config LZ4_DECOMPRESS
342	tristate
343
344config ZSTD_COMMON
345	select XXHASH
346	tristate
347
348config ZSTD_COMPRESS
349	select ZSTD_COMMON
350	tristate
351
352config ZSTD_DECOMPRESS
353	select ZSTD_COMMON
354	tristate
355
356source "lib/xz/Kconfig"
357
358#
359# These all provide a common interface (hence the apparent duplication with
360# ZLIB_INFLATE; DECOMPRESS_GZIP is just a wrapper.)
361#
362config DECOMPRESS_GZIP
363	select ZLIB_INFLATE
364	tristate
365
366config DECOMPRESS_BZIP2
367	tristate
368
369config DECOMPRESS_LZMA
370	tristate
371
372config DECOMPRESS_XZ
373	select XZ_DEC
374	tristate
375
376config DECOMPRESS_LZO
377	select LZO_DECOMPRESS
378	tristate
379
380config DECOMPRESS_LZ4
381	select LZ4_DECOMPRESS
382	tristate
383
384config DECOMPRESS_ZSTD
385	select ZSTD_DECOMPRESS
386	tristate
387
388#
389# Generic allocator support is selected if needed
390#
391config GENERIC_ALLOCATOR
392	bool
393
394#
395# reed solomon support is select'ed if needed
396#
397config REED_SOLOMON
398	tristate
399	
400config REED_SOLOMON_ENC8
401	bool
402
403config REED_SOLOMON_DEC8
404	bool
405
406config REED_SOLOMON_ENC16
407	bool
408
409config REED_SOLOMON_DEC16
410	bool
411
412#
413# BCH support is selected if needed
414#
415config BCH
416	tristate
417
418config BCH_CONST_PARAMS
419	bool
420	help
421	  Drivers may select this option to force specific constant
422	  values for parameters 'm' (Galois field order) and 't'
423	  (error correction capability). Those specific values must
424	  be set by declaring default values for symbols BCH_CONST_M
425	  and BCH_CONST_T.
426	  Doing so will enable extra compiler optimizations,
427	  improving encoding and decoding performance up to 2x for
428	  usual (m,t) values (typically such that m*t < 200).
429	  When this option is selected, the BCH library supports
430	  only a single (m,t) configuration. This is mainly useful
431	  for NAND flash board drivers requiring known, fixed BCH
432	  parameters.
433
434config BCH_CONST_M
435	int
436	range 5 15
437	help
438	  Constant value for Galois field order 'm'. If 'k' is the
439	  number of data bits to protect, 'm' should be chosen such
440	  that (k + m*t) <= 2**m - 1.
441	  Drivers should declare a default value for this symbol if
442	  they select option BCH_CONST_PARAMS.
443
444config BCH_CONST_T
445	int
446	help
447	  Constant value for error correction capability in bits 't'.
448	  Drivers should declare a default value for this symbol if
449	  they select option BCH_CONST_PARAMS.
450
451#
452# Textsearch support is select'ed if needed
453#
454config TEXTSEARCH
455	bool
456
457config TEXTSEARCH_KMP
458	tristate
459
460config TEXTSEARCH_BM
461	tristate
462
463config TEXTSEARCH_FSM
464	tristate
465
466config BTREE
467	bool
468
469config INTERVAL_TREE
470	bool
471	help
472	  Simple, embeddable, interval-tree. Can find the start of an
473	  overlapping range in log(n) time and then iterate over all
474	  overlapping nodes. The algorithm is implemented as an
475	  augmented rbtree.
476
477	  See:
478
479		Documentation/core-api/rbtree.rst
480
481	  for more information.
482
483config INTERVAL_TREE_SPAN_ITER
484	bool
485	depends on INTERVAL_TREE
486
487config XARRAY_MULTI
488	bool
489	help
490	  Support entries which occupy multiple consecutive indices in the
491	  XArray.
492
493config ASSOCIATIVE_ARRAY
494	bool
495	help
496	  Generic associative array.  Can be searched and iterated over whilst
497	  it is being modified.  It is also reasonably quick to search and
498	  modify.  The algorithms are non-recursive, and the trees are highly
499	  capacious.
500
501	  See:
502
503		Documentation/core-api/assoc_array.rst
504
505	  for more information.
506
507config HAS_IOMEM
508	bool
509	depends on !NO_IOMEM
 
510	default y
511
512config HAS_IOPORT_MAP
513	bool
514	depends on HAS_IOMEM && !NO_IOPORT_MAP
515	default y
516
517source "kernel/dma/Kconfig"
518
519config SGL_ALLOC
520	bool
521	default n
522
523config IOMMU_HELPER
524	bool
 
 
525
526config CHECK_SIGNATURE
527	bool
528
529config CPUMASK_OFFSTACK
530	bool "Force CPU masks off stack" if DEBUG_PER_CPU_MAPS
531	help
532	  Use dynamic allocation for cpumask_var_t, instead of putting
533	  them on the stack.  This is a bit more expensive, but avoids
534	  stack overflow.
535
536config FORCE_NR_CPUS
537       bool "Set number of CPUs at compile time"
538       depends on SMP && EXPERT && !COMPILE_TEST
539       help
540         Say Yes if you have NR_CPUS set to an actual number of possible
541         CPUs in your system, not to a default value. This forces the core
542         code to rely on compile-time value and optimize kernel routines
543         better.
544
545config CPU_RMAP
546	bool
547	depends on SMP
548
549config DQL
550	bool
551
552config GLOB
553	bool
554#	This actually supports modular compilation, but the module overhead
555#	is ridiculous for the amount of code involved.	Until an out-of-tree
556#	driver asks for it, we'll just link it directly it into the kernel
557#	when required.  Since we're ignoring out-of-tree users,	there's also
558#	no need bother prompting for a manual decision:
559#	prompt "glob_match() function"
560	help
561	  This option provides a glob_match function for performing
562	  simple text pattern matching.  It originated in the ATA code
563	  to blacklist particular drive models, but other device drivers
564	  may need similar functionality.
565
566	  All drivers in the Linux kernel tree that require this function
567	  should automatically select this option.  Say N unless you
568	  are compiling an out-of tree driver which tells you that it
569	  depends on this.
570
571config GLOB_SELFTEST
572	tristate "glob self-test on init"
 
573	depends on GLOB
574	help
575	  This option enables a simple self-test of the glob_match
576	  function on startup.	It is primarily useful for people
577	  working on the code to ensure they haven't introduced any
578	  regressions.
579
580	  It only adds a little bit of code and slows kernel boot (or
581	  module load) by a small amount, so you're welcome to play with
582	  it, but you probably don't need it.
583
584#
585# Netlink attribute parsing support is select'ed if needed
586#
587config NLATTR
588	bool
589
590#
591# Generic 64-bit atomic support is selected if needed
592#
593config GENERIC_ATOMIC64
594       bool
595
 
 
 
596config LRU_CACHE
597	tristate
598
599config CLZ_TAB
600	bool
601
 
 
 
 
 
 
 
 
 
 
 
 
 
 
602config IRQ_POLL
603	bool "IRQ polling library"
604	help
605	  Helper library to poll interrupt mitigation using polling.
606
607config MPILIB
608	tristate
609	select CLZ_TAB
610	help
611	  Multiprecision maths library from GnuPG.
612	  It is used to implement RSA digital signature verification,
613	  which is used by IMA/EVM digital signature extension.
614
615config SIGNATURE
616	tristate
617	depends on KEYS
618	select CRYPTO
619	select CRYPTO_SHA1
620	select MPILIB
621	help
622	  Digital signature verification. Currently only RSA is supported.
623	  Implementation is done using GnuPG MPI library
624
625config DIMLIB
626	bool
627	help
628	  Dynamic Interrupt Moderation library.
629	  Implements an algorithm for dynamically changing CQ moderation values
630	  according to run time performance.
631
632#
633# libfdt files, only selected if needed.
634#
635config LIBFDT
636	bool
637
638config OID_REGISTRY
639	tristate
640	help
641	  Enable fast lookup object identifier registry.
642
643config UCS2_STRING
644	tristate
645
646#
647# generic vdso
648#
649source "lib/vdso/Kconfig"
650
651source "lib/fonts/Kconfig"
652
653config SG_SPLIT
654	def_bool n
655	help
656	 Provides a helper to split scatterlists into chunks, each chunk being
657	 a scatterlist. This should be selected by a driver or an API which
658	 whishes to split a scatterlist amongst multiple DMA channels.
659
660config SG_POOL
661	def_bool n
662	help
663	 Provides a helper to allocate chained scatterlists. This should be
664	 selected by a driver or an API which whishes to allocate chained
665	 scatterlist.
666
667#
668# sg chaining option
669#
670
671config ARCH_NO_SG_CHAIN
672	def_bool n
673
674config ARCH_HAS_PMEM_API
675	bool
676
677config MEMREGION
678	bool
679
680config ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION
681	bool
682
683config ARCH_HAS_MEMREMAP_COMPAT_ALIGN
684	bool
685
686# use memcpy to implement user copies for nommu architectures
687config UACCESS_MEMCPY
688	bool
689
690config ARCH_HAS_UACCESS_FLUSHCACHE
691	bool
692
693# arch has a concept of a recoverable synchronous exception due to a
694# memory-read error like x86 machine-check or ARM data-abort, and
695# implements copy_mc_to_{user,kernel} to abort and report
696# 'bytes-transferred' if that exception fires when accessing the source
697# buffer.
698config ARCH_HAS_COPY_MC
699	bool
700
701# Temporary. Goes away when all archs are cleaned up
702config ARCH_STACKWALK
703       bool
704
705config STACKDEPOT
706	bool
707	select STACKTRACE
708
709config STACKDEPOT_ALWAYS_INIT
710	bool
711	select STACKDEPOT
712
713config REF_TRACKER
714	bool
715	depends on STACKTRACE_SUPPORT
716	select STACKDEPOT
717
718config SBITMAP
719	bool
720
721config PARMAN
722	tristate "parman" if COMPILE_TEST
723
724config OBJAGG
725	tristate "objagg" if COMPILE_TEST
726
727endmenu
728
729config GENERIC_IOREMAP
730	bool
731
732config GENERIC_LIB_ASHLDI3
733	bool
734
735config GENERIC_LIB_ASHRDI3
736	bool
737
738config GENERIC_LIB_LSHRDI3
739	bool
740
741config GENERIC_LIB_MULDI3
742	bool
743
744config GENERIC_LIB_CMPDI2
745	bool
746
747config GENERIC_LIB_UCMPDI2
748	bool
749
750config GENERIC_LIB_DEVMEM_IS_ALLOWED
751	bool
752
753config PLDMFW
754	bool
755	default n
756
757config ASN1_ENCODER
758       tristate
759
760config POLYNOMIAL
761       tristate