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
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