xref: /linux/lib/crc/Kconfig (revision b10d2d20d9786c14133c76cc6aee13e46664dabc) 
1# SPDX-License-Identifier: GPL-2.0-only
2
3# Kconfig for the kernel's cyclic redundancy check (CRC) library code
4
5config CRC4
6	tristate
7	help
8	  The CRC4 library functions.  Select this if your module uses any of
9	  the functions from <linux/crc4.h>.
10
11config CRC7
12	tristate
13	help
14	  The CRC7 library functions.  Select this if your module uses any of
15	  the functions from <linux/crc7.h>.
16
17config CRC8
18	tristate
19	help
20	  The CRC8 library functions.  Select this if your module uses any of
21	  the functions from <linux/crc8.h>.
22
23config CRC16
24	tristate
25	help
26	  The CRC16 library functions.  Select this if your module uses any of
27	  the functions from <linux/crc16.h>.
28
29config CRC_CCITT
30	tristate
31	help
32	  The CRC-CCITT library functions.  Select this if your module uses any
33	  of the functions from <linux/crc-ccitt.h>.
34
35config CRC_ITU_T
36	tristate
37	help
38	  The CRC-ITU-T library functions.  Select this if your module uses
39	  any of the functions from <linux/crc-itu-t.h>.
40
41config CRC_T10DIF
42	tristate
43	help
44	  The CRC-T10DIF library functions.  Select this if your module uses
45	  any of the functions from <linux/crc-t10dif.h>.
46
47config ARCH_HAS_CRC_T10DIF
48	bool
49
50config CRC_T10DIF_ARCH
51	bool
52	depends on CRC_T10DIF && CRC_OPTIMIZATIONS
53	default y if ARM && KERNEL_MODE_NEON
54	default y if ARM64 && KERNEL_MODE_NEON
55
56config CRC32
57	tristate
58	select BITREVERSE
59	help
60	  The CRC32 library functions.  Select this if your module uses any of
61	  the functions from <linux/crc32.h> or <linux/crc32c.h>.
62
63config ARCH_HAS_CRC32
64	bool
65
66config CRC32_ARCH
67	bool
68	depends on CRC32 && CRC_OPTIMIZATIONS
69	default y if ARM && KERNEL_MODE_NEON
70	default y if ARM64
71	default y if LOONGARCH
72
73config CRC64
74	tristate
75	help
76	  The CRC64 library functions.  Select this if your module uses any of
77	  the functions from <linux/crc64.h>.
78
79config ARCH_HAS_CRC64
80	bool
81
82config CRC64_ARCH
83	bool
84	depends on CRC64 && CRC_OPTIMIZATIONS
85
86config CRC_OPTIMIZATIONS
87	bool "Enable optimized CRC implementations" if EXPERT
88	depends on !UML
89	default y
90	help
91	  Disabling this option reduces code size slightly by disabling the
92	  architecture-optimized implementations of any CRC variants that are
93	  enabled.  CRC checksumming performance may get much slower.
94
95	  Keep this enabled unless you're really trying to minimize the size of
96	  the kernel.
97
98config CRC_KUNIT_TEST
99	tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS
100	depends on KUNIT
101	default KUNIT_ALL_TESTS
102	select CRC7
103	select CRC16
104	select CRC_T10DIF
105	select CRC32
106	select CRC64
107	help
108	  Unit tests for the CRC library functions.
109
110	  This is intended to help people writing architecture-specific
111	  optimized versions.  If unsure, say N.
112
113config CRC_BENCHMARK
114	bool "Benchmark for the CRC functions"
115	depends on CRC_KUNIT_TEST
116	help
117	  Include benchmarks in the KUnit test suite for the CRC functions.
118