mirror of https://github.com/torvalds/linux.git
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* RISC-V optimized CRC32 functions
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*
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* Copyright 2025 Google LLC
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*/
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#include <asm/hwcap.h>
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#include <asm/alternative-macros.h>
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#include <linux/crc32.h>
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#include <linux/module.h>
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#include "crc-clmul.h"
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u32 crc32_le_arch(u32 crc, const u8 *p, size_t len)
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{
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if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
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return crc32_lsb_clmul(crc, p, len,
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&crc32_lsb_0xedb88320_consts);
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return crc32_le_base(crc, p, len);
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}
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EXPORT_SYMBOL(crc32_le_arch);
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u32 crc32_be_arch(u32 crc, const u8 *p, size_t len)
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{
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if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
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return crc32_msb_clmul(crc, p, len,
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&crc32_msb_0x04c11db7_consts);
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return crc32_be_base(crc, p, len);
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}
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EXPORT_SYMBOL(crc32_be_arch);
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u32 crc32c_arch(u32 crc, const u8 *p, size_t len)
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{
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if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
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return crc32_lsb_clmul(crc, p, len,
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&crc32_lsb_0x82f63b78_consts);
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return crc32c_base(crc, p, len);
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}
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EXPORT_SYMBOL(crc32c_arch);
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u32 crc32_optimizations(void)
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{
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if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
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return CRC32_LE_OPTIMIZATION |
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CRC32_BE_OPTIMIZATION |
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CRC32C_OPTIMIZATION;
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return 0;
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}
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EXPORT_SYMBOL(crc32_optimizations);
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MODULE_DESCRIPTION("RISC-V optimized CRC32 functions");
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MODULE_LICENSE("GPL");
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