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b10749d89f
Move the x86-optimized CRC code from arch/x86/lib/crc* into its new location in lib/crc/x86/, and wire it up in the new way. This new way of organizing the CRC code eliminates the need to artificially split the code for each CRC variant into separate arch and generic modules, enabling better inlining and dead code elimination. For more details, see "lib/crc: Prepare for arch-optimized code in subdirs of lib/crc/". Reviewed-by: "Martin K. Petersen" <martin.petersen@oracle.com> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: "Jason A. Donenfeld" <Jason@zx2c4.com> Link: https://lore.kernel.org/r/20250607200454.73587-12-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
129 lines
3.1 KiB
Plaintext
129 lines
3.1 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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# Kconfig for the kernel's cyclic redundancy check (CRC) library code
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config CRC4
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tristate
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help
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The CRC4 library functions. Select this if your module uses any of
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the functions from <linux/crc4.h>.
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config CRC7
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tristate
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help
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The CRC7 library functions. Select this if your module uses any of
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the functions from <linux/crc7.h>.
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config CRC8
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tristate
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help
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The CRC8 library functions. Select this if your module uses any of
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the functions from <linux/crc8.h>.
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config CRC16
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tristate
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help
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The CRC16 library functions. Select this if your module uses any of
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the functions from <linux/crc16.h>.
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config CRC_CCITT
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tristate
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help
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The CRC-CCITT library functions. Select this if your module uses any
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of the functions from <linux/crc-ccitt.h>.
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config CRC_ITU_T
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tristate
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help
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The CRC-ITU-T library functions. Select this if your module uses
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any of the functions from <linux/crc-itu-t.h>.
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config CRC_T10DIF
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tristate
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help
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The CRC-T10DIF library functions. Select this if your module uses
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any of the functions from <linux/crc-t10dif.h>.
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config ARCH_HAS_CRC_T10DIF
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bool
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config CRC_T10DIF_ARCH
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bool
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depends on CRC_T10DIF && CRC_OPTIMIZATIONS
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default y if ARM && KERNEL_MODE_NEON
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default y if ARM64 && KERNEL_MODE_NEON
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default y if PPC64 && ALTIVEC
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default y if RISCV && RISCV_ISA_ZBC
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default y if X86
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config CRC32
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tristate
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select BITREVERSE
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help
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The CRC32 library functions. Select this if your module uses any of
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the functions from <linux/crc32.h> or <linux/crc32c.h>.
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config ARCH_HAS_CRC32
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bool
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config CRC32_ARCH
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bool
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depends on CRC32 && CRC_OPTIMIZATIONS
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default y if ARM && KERNEL_MODE_NEON
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default y if ARM64
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default y if LOONGARCH
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default y if MIPS && CPU_MIPSR6
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default y if PPC64 && ALTIVEC
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default y if RISCV && RISCV_ISA_ZBC
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default y if S390
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default y if SPARC64
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default y if X86
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config CRC64
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tristate
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help
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The CRC64 library functions. Select this if your module uses any of
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the functions from <linux/crc64.h>.
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config ARCH_HAS_CRC64
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bool
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config CRC64_ARCH
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bool
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depends on CRC64 && CRC_OPTIMIZATIONS
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default y if RISCV && RISCV_ISA_ZBC && 64BIT
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default y if X86_64
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config CRC_OPTIMIZATIONS
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bool "Enable optimized CRC implementations" if EXPERT
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depends on !UML
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default y
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help
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Disabling this option reduces code size slightly by disabling the
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architecture-optimized implementations of any CRC variants that are
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enabled. CRC checksumming performance may get much slower.
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Keep this enabled unless you're really trying to minimize the size of
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the kernel.
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config CRC_KUNIT_TEST
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tristate "KUnit tests for CRC functions" if !KUNIT_ALL_TESTS
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depends on KUNIT
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default KUNIT_ALL_TESTS
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select CRC7
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select CRC16
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select CRC_T10DIF
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select CRC32
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select CRC64
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help
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Unit tests for the CRC library functions.
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This is intended to help people writing architecture-specific
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optimized versions. If unsure, say N.
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config CRC_BENCHMARK
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bool "Benchmark for the CRC functions"
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depends on CRC_KUNIT_TEST
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help
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Include benchmarks in the KUnit test suite for the CRC functions.
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