# 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	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 && 64BIT	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 ARM && KERNEL_MODE_NEON && !CPU_BIG_ENDIAN	default y if ARM64	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 && (CRC7 || CRC16 || CRC_T10DIF || CRC32 || CRC64)	default KUNIT_ALL_TESTS	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_ENABLE_ALL_FOR_KUNIT	tristate "Enable all CRC functions for KUnit test"	depends on KUNIT	select CRC7	select CRC16	select CRC_T10DIF	select CRC32	select CRC64	help	  Enable all CRC functions that have test code in CRC_KUNIT_TEST. 	  Enable this only if you'd like the CRC KUnit test suite to test all	  the CRC variants, even ones that wouldn't otherwise need to be built. 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.