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# SPDX-License-Identifier: GPL-2.0-only
# Kconfig for the kernel's cyclic redundancy check (CRC) library code
config CRC4
tristate
help
The CRC4 library functions. Select this if your module uses any of
the functions from <linux/crc4.h>.
config CRC7
tristate
help
The CRC7 library functions. Select this if your module uses any of
the functions from <linux/crc7.h>.
config CRC8
tristate
help
The CRC8 library functions. Select this if your module uses any of
the functions from <linux/crc8.h>.
config CRC16
tristate
help
The CRC16 library functions. Select this if your module uses any of
the functions from <linux/crc16.h>.
config CRC_CCITT
tristate
help
The CRC-CCITT library functions. Select this if your module uses any
of the functions from <linux/crc-ccitt.h>.
config CRC_ITU_T
tristate
help
The CRC-ITU-T library functions. Select this if your module uses
any of the functions from <linux/crc-itu-t.h>.
config CRC_T10DIF
tristate
help
The CRC-T10DIF library functions. Select this if your module uses
any of the functions from <linux/crc-t10dif.h>.
config CRC_T10DIF_ARCH
bool
depends on CRC_T10DIF && CRC_OPTIMIZATIONS
default y if ARM && KERNEL_MODE_NEON
default y if ARM64 && KERNEL_MODE_NEON
default y if PPC64 && ALTIVEC
default y if RISCV && RISCV_ISA_ZBC
default y if X86
config CRC32
tristate
select BITREVERSE
help
The CRC32 library functions. Select this if your module uses any of
the functions from <linux/crc32.h> or <linux/crc32c.h>.
config CRC32_ARCH
bool
depends on CRC32 && CRC_OPTIMIZATIONS
default y if ARM && KERNEL_MODE_NEON
default y if ARM64
default y if LOONGARCH
default y if MIPS && CPU_MIPSR6
default y if PPC64 && ALTIVEC
default y if RISCV && RISCV_ISA_ZBC
default y if S390
default y if SPARC64
default y if X86
config CRC64
tristate
help
The CRC64 library functions. Select this if your module uses any of
the functions from <linux/crc64.h>.
config CRC64_ARCH
bool
depends on CRC64 && CRC_OPTIMIZATIONS
default y if RISCV && RISCV_ISA_ZBC && 64BIT
default y if X86_64
config CRC_OPTIMIZATIONS
bool "Enable optimized CRC implementations" if EXPERT
depends on !UML
default y
help
Disabling this option reduces code size slightly by disabling the
architecture-optimized implementations of any CRC variants that are
enabled. CRC checksumming performance may get much slower.
Keep this enabled unless you're really trying to minimize the size of
the kernel.
config CRC_KUNIT_TEST
tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS
depends on KUNIT
default KUNIT_ALL_TESTS
select CRC7
select CRC16
select CRC_T10DIF
select CRC32
select CRC64
help
Unit tests for the CRC library functions.
This is intended to help people writing architecture-specific
optimized versions. If unsure, say N.
config CRC_BENCHMARK
bool "Benchmark for the CRC functions"
depends on CRC_KUNIT_TEST
help
Include benchmarks in the KUnit test suite for the CRC functions.
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