xref: /linux/lib/crc/Kconfig (revision 190c253d8696b7ba14424c484435ac2d4bcb9ebd) 
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	default y if PPC64 && ALTIVEC
56
57config CRC32
58	tristate
59	select BITREVERSE
60	help
61	  The CRC32 library functions.  Select this if your module uses any of
62	  the functions from <linux/crc32.h> or <linux/crc32c.h>.
63
64config ARCH_HAS_CRC32
65	bool
66
67config CRC32_ARCH
68	bool
69	depends on CRC32 && CRC_OPTIMIZATIONS
70	default y if ARM && KERNEL_MODE_NEON
71	default y if ARM64
72	default y if LOONGARCH
73	default y if MIPS && CPU_MIPSR6
74	default y if PPC64 && ALTIVEC
75
76config CRC64
77	tristate
78	help
79	  The CRC64 library functions.  Select this if your module uses any of
80	  the functions from <linux/crc64.h>.
81
82config ARCH_HAS_CRC64
83	bool
84
85config CRC64_ARCH
86	bool
87	depends on CRC64 && CRC_OPTIMIZATIONS
88
89config CRC_OPTIMIZATIONS
90	bool "Enable optimized CRC implementations" if EXPERT
91	depends on !UML
92	default y
93	help
94	  Disabling this option reduces code size slightly by disabling the
95	  architecture-optimized implementations of any CRC variants that are
96	  enabled.  CRC checksumming performance may get much slower.
97
98	  Keep this enabled unless you're really trying to minimize the size of
99	  the kernel.
100
101config CRC_KUNIT_TEST
102	tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS
103	depends on KUNIT
104	default KUNIT_ALL_TESTS
105	select CRC7
106	select CRC16
107	select CRC_T10DIF
108	select CRC32
109	select CRC64
110	help
111	  Unit tests for the CRC library functions.
112
113	  This is intended to help people writing architecture-specific
114	  optimized versions.  If unsure, say N.
115
116config CRC_BENCHMARK
117	bool "Benchmark for the CRC functions"
118	depends on CRC_KUNIT_TEST
119	help
120	  Include benchmarks in the KUnit test suite for the CRC functions.
121