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 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 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