1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * sm3-neon-glue.c - SM3 secure hash using NEON instructions 4 * 5 * Copyright (C) 2022 Tianjia Zhang <tianjia.zhang@linux.alibaba.com> 6 */ 7 8 #include <asm/neon.h> 9 #include <asm/simd.h> 10 #include <asm/unaligned.h> 11 #include <crypto/internal/hash.h> 12 #include <crypto/internal/simd.h> 13 #include <crypto/sm3.h> 14 #include <crypto/sm3_base.h> 15 #include <linux/cpufeature.h> 16 #include <linux/crypto.h> 17 #include <linux/module.h> 18 19 20 asmlinkage void sm3_neon_transform(struct sm3_state *sst, u8 const *src, 21 int blocks); 22 23 static int sm3_neon_update(struct shash_desc *desc, const u8 *data, 24 unsigned int len) 25 { 26 if (!crypto_simd_usable()) { 27 sm3_update(shash_desc_ctx(desc), data, len); 28 return 0; 29 } 30 31 kernel_neon_begin(); 32 sm3_base_do_update(desc, data, len, sm3_neon_transform); 33 kernel_neon_end(); 34 35 return 0; 36 } 37 38 static int sm3_neon_final(struct shash_desc *desc, u8 *out) 39 { 40 if (!crypto_simd_usable()) { 41 sm3_final(shash_desc_ctx(desc), out); 42 return 0; 43 } 44 45 kernel_neon_begin(); 46 sm3_base_do_finalize(desc, sm3_neon_transform); 47 kernel_neon_end(); 48 49 return sm3_base_finish(desc, out); 50 } 51 52 static int sm3_neon_finup(struct shash_desc *desc, const u8 *data, 53 unsigned int len, u8 *out) 54 { 55 if (!crypto_simd_usable()) { 56 struct sm3_state *sctx = shash_desc_ctx(desc); 57 58 if (len) 59 sm3_update(sctx, data, len); 60 sm3_final(sctx, out); 61 return 0; 62 } 63 64 kernel_neon_begin(); 65 if (len) 66 sm3_base_do_update(desc, data, len, sm3_neon_transform); 67 sm3_base_do_finalize(desc, sm3_neon_transform); 68 kernel_neon_end(); 69 70 return sm3_base_finish(desc, out); 71 } 72 73 static struct shash_alg sm3_alg = { 74 .digestsize = SM3_DIGEST_SIZE, 75 .init = sm3_base_init, 76 .update = sm3_neon_update, 77 .final = sm3_neon_final, 78 .finup = sm3_neon_finup, 79 .descsize = sizeof(struct sm3_state), 80 .base.cra_name = "sm3", 81 .base.cra_driver_name = "sm3-neon", 82 .base.cra_blocksize = SM3_BLOCK_SIZE, 83 .base.cra_module = THIS_MODULE, 84 .base.cra_priority = 200, 85 }; 86 87 static int __init sm3_neon_init(void) 88 { 89 return crypto_register_shash(&sm3_alg); 90 } 91 92 static void __exit sm3_neon_fini(void) 93 { 94 crypto_unregister_shash(&sm3_alg); 95 } 96 97 module_init(sm3_neon_init); 98 module_exit(sm3_neon_fini); 99 100 MODULE_DESCRIPTION("SM3 secure hash using NEON instructions"); 101 MODULE_AUTHOR("Jussi Kivilinna <jussi.kivilinna@iki.fi>"); 102 MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>"); 103 MODULE_LICENSE("GPL v2"); 104