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| 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
|---|---|
| 2 | /* |
| 3 | * RISC-V optimized CRC64 functions |
| 4 | * |
| 5 | * Copyright 2025 Google LLC |
| 6 | */ |
| 7 | |
| 8 | #include <asm/hwcap.h> |
| 9 | #include <asm/alternative-macros.h> |
| 10 | |
| 11 | #include "crc-clmul.h" |
| 12 | |
| 13 | static inline u64 crc64_be_arch(u64 crc, const u8 *p, size_t len) |
| 14 | { |
| 15 | if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC)) |
| 16 | return crc64_msb_clmul(crc, p, len, |
| 17 | &crc64_msb_0x42f0e1eba9ea3693_consts); |
| 18 | return crc64_be_generic(crc, p, len); |
| 19 | } |
| 20 | |
| 21 | static inline u64 crc64_nvme_arch(u64 crc, const u8 *p, size_t len) |
| 22 | { |
| 23 | if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC)) |
| 24 | return crc64_lsb_clmul(crc, p, len, |
| 25 | &crc64_lsb_0x9a6c9329ac4bc9b5_consts); |
| 26 | return crc64_nvme_generic(crc, p, len); |
| 27 | } |
| 28 |
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