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 CRC_T10DIF_ARCH 48 bool 49 depends on CRC_T10DIF && CRC_OPTIMIZATIONS 50 default y if ARM && KERNEL_MODE_NEON 51 default y if ARM64 52 default y if PPC64 && ALTIVEC 53 default y if RISCV && RISCV_ISA_ZBC 54 default y if X86 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 CRC32_ARCH 64 bool 65 depends on CRC32 && CRC_OPTIMIZATIONS 66 default y if ARM && KERNEL_MODE_NEON 67 default y if ARM64 68 default y if LOONGARCH && 64BIT 69 default y if MIPS && CPU_MIPSR6 70 default y if PPC64 && ALTIVEC 71 default y if RISCV && RISCV_ISA_ZBC 72 default y if S390 73 default y if SPARC64 74 default y if X86 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 CRC64_ARCH 83 bool 84 depends on CRC64 && CRC_OPTIMIZATIONS 85 default y if ARM && KERNEL_MODE_NEON && !CPU_BIG_ENDIAN 86 default y if ARM64 87 default y if RISCV && RISCV_ISA_ZBC && 64BIT 88 default y if X86_64 89 90config CRC_OPTIMIZATIONS 91 bool "Enable optimized CRC implementations" if EXPERT 92 depends on !UML 93 default y 94 help 95 Disabling this option reduces code size slightly by disabling the 96 architecture-optimized implementations of any CRC variants that are 97 enabled. CRC checksumming performance may get much slower. 98 99 Keep this enabled unless you're really trying to minimize the size of 100 the kernel. 101 102config CRC_KUNIT_TEST 103 tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS 104 depends on KUNIT && (CRC7 || CRC16 || CRC_T10DIF || CRC32 || CRC64) 105 default KUNIT_ALL_TESTS 106 help 107 Unit tests for the CRC library functions. 108 109 This is intended to help people writing architecture-specific 110 optimized versions. If unsure, say N. 111 112config CRC_ENABLE_ALL_FOR_KUNIT 113 tristate "Enable all CRC functions for KUnit test" 114 depends on KUNIT 115 select CRC7 116 select CRC16 117 select CRC_T10DIF 118 select CRC32 119 select CRC64 120 help 121 Enable all CRC functions that have test code in CRC_KUNIT_TEST. 122 123 Enable this only if you'd like the CRC KUnit test suite to test all 124 the CRC variants, even ones that wouldn't otherwise need to be built. 125 126config CRC_BENCHMARK 127 bool "Benchmark for the CRC functions" 128 depends on CRC_KUNIT_TEST 129 help 130 Include benchmarks in the KUnit test suite for the CRC functions. 131