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 #include <linux/crc64.h>
11 #include <linux/module.h>
12
13 #include "crc-clmul.h"
14
crc64_be_arch(u64 crc,const u8 * p,size_t len)15 u64 crc64_be_arch(u64 crc, const u8 *p, size_t len)
16 {
17 if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
18 return crc64_msb_clmul(crc, p, len,
19 &crc64_msb_0x42f0e1eba9ea3693_consts);
20 return crc64_be_generic(crc, p, len);
21 }
22 EXPORT_SYMBOL(crc64_be_arch);
23
crc64_nvme_arch(u64 crc,const u8 * p,size_t len)24 u64 crc64_nvme_arch(u64 crc, const u8 *p, size_t len)
25 {
26 if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
27 return crc64_lsb_clmul(crc, p, len,
28 &crc64_lsb_0x9a6c9329ac4bc9b5_consts);
29 return crc64_nvme_generic(crc, p, len);
30 }
31 EXPORT_SYMBOL(crc64_nvme_arch);
32
33 MODULE_DESCRIPTION("RISC-V optimized CRC64 functions");
34 MODULE_LICENSE("GPL");
35