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Jesse Taube
e7c9d66e31
Detect if vector misaligned accesses are faster or slower than equivalent vector byte accesses. This is useful for usermode to know whether vector byte accesses or vector misaligned accesses have a better bandwidth for operations like memcpy. Signed-off-by: Jesse Taube <jesse@rivosinc.com> Reviewed-by: Charlie Jenkins <charlie@rivosinc.com> Link: https://lore.kernel.org/r/20241017-jesse_unaligned_vector-v10-5-5b33500160f8@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
19 lines
603 B
C
19 lines
603 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2023 Rivos, Inc.
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*/
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#ifndef __RISCV_KERNEL_COPY_UNALIGNED_H
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#define __RISCV_KERNEL_COPY_UNALIGNED_H
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#include <linux/types.h>
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void __riscv_copy_words_unaligned(void *dst, const void *src, size_t size);
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void __riscv_copy_bytes_unaligned(void *dst, const void *src, size_t size);
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#ifdef CONFIG_RISCV_PROBE_VECTOR_UNALIGNED_ACCESS
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void __riscv_copy_vec_words_unaligned(void *dst, const void *src, size_t size);
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void __riscv_copy_vec_bytes_unaligned(void *dst, const void *src, size_t size);
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#endif
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#endif /* __RISCV_KERNEL_COPY_UNALIGNED_H */
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