xref: /linux/arch/riscv/lib/crc64.c (revision 4f9786035f9e519db41375818e1d0b5f20da2f10)
1*511484faSEric Biggers // SPDX-License-Identifier: GPL-2.0-or-later
2*511484faSEric Biggers /*
3*511484faSEric Biggers  * RISC-V optimized CRC64 functions
4*511484faSEric Biggers  *
5*511484faSEric Biggers  * Copyright 2025 Google LLC
6*511484faSEric Biggers  */
7*511484faSEric Biggers 
8*511484faSEric Biggers #include <asm/hwcap.h>
9*511484faSEric Biggers #include <asm/alternative-macros.h>
10*511484faSEric Biggers #include <linux/crc64.h>
11*511484faSEric Biggers #include <linux/module.h>
12*511484faSEric Biggers 
13*511484faSEric Biggers #include "crc-clmul.h"
14*511484faSEric Biggers 
15*511484faSEric Biggers u64 crc64_be_arch(u64 crc, const u8 *p, size_t len)
16*511484faSEric Biggers {
17*511484faSEric Biggers 	if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
18*511484faSEric Biggers 		return crc64_msb_clmul(crc, p, len,
19*511484faSEric Biggers 				       &crc64_msb_0x42f0e1eba9ea3693_consts);
20*511484faSEric Biggers 	return crc64_be_generic(crc, p, len);
21*511484faSEric Biggers }
22*511484faSEric Biggers EXPORT_SYMBOL(crc64_be_arch);
23*511484faSEric Biggers 
24*511484faSEric Biggers u64 crc64_nvme_arch(u64 crc, const u8 *p, size_t len)
25*511484faSEric Biggers {
26*511484faSEric Biggers 	if (riscv_has_extension_likely(RISCV_ISA_EXT_ZBC))
27*511484faSEric Biggers 		return crc64_lsb_clmul(crc, p, len,
28*511484faSEric Biggers 				       &crc64_lsb_0x9a6c9329ac4bc9b5_consts);
29*511484faSEric Biggers 	return crc64_nvme_generic(crc, p, len);
30*511484faSEric Biggers }
31*511484faSEric Biggers EXPORT_SYMBOL(crc64_nvme_arch);
32*511484faSEric Biggers 
33*511484faSEric Biggers MODULE_DESCRIPTION("RISC-V optimized CRC64 functions");
34*511484faSEric Biggers MODULE_LICENSE("GPL");
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