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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
19MODULE_DESCRIPTION("SM3 secure hash using ARMv8 Crypto Extensions");
20MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
21MODULE_LICENSE("GPL v2");
22
23asmlinkage void sm3_ce_transform(struct sm3_state *sst, u8 const *src,
24 int blocks);
25
26static int sm3_ce_update(struct shash_desc *desc, const u8 *data,
27 unsigned int len)
28{
29 if (!crypto_simd_usable())
30 return crypto_sm3_update(desc, data, len);
31
32 kernel_neon_begin();
33 sm3_base_do_update(desc, data, len, sm3_ce_transform);
34 kernel_neon_end();
35
36 return 0;
37}
38
39static int sm3_ce_final(struct shash_desc *desc, u8 *out)
40{
41 if (!crypto_simd_usable())
42 return crypto_sm3_finup(desc, NULL, 0, out);
43
44 kernel_neon_begin();
45 sm3_base_do_finalize(desc, sm3_ce_transform);
46 kernel_neon_end();
47
48 return sm3_base_finish(desc, out);
49}
50
51static int sm3_ce_finup(struct shash_desc *desc, const u8 *data,
52 unsigned int len, u8 *out)
53{
54 if (!crypto_simd_usable())
55 return crypto_sm3_finup(desc, data, len, out);
56
57 kernel_neon_begin();
58 sm3_base_do_update(desc, data, len, sm3_ce_transform);
59 kernel_neon_end();
60
61 return sm3_ce_final(desc, out);
62}
63
64static struct shash_alg sm3_alg = {
65 .digestsize = SM3_DIGEST_SIZE,
66 .init = sm3_base_init,
67 .update = sm3_ce_update,
68 .final = sm3_ce_final,
69 .finup = sm3_ce_finup,
70 .descsize = sizeof(struct sm3_state),
71 .base.cra_name = "sm3",
72 .base.cra_driver_name = "sm3-ce",
73 .base.cra_blocksize = SM3_BLOCK_SIZE,
74 .base.cra_module = THIS_MODULE,
75 .base.cra_priority = 200,
76};
77
78static int __init sm3_ce_mod_init(void)
79{
80 return crypto_register_shash(&sm3_alg);
81}
82
83static void __exit sm3_ce_mod_fini(void)
84{
85 crypto_unregister_shash(&sm3_alg);
86}
87
88module_cpu_feature_match(SM3, sm3_ce_mod_init);
89module_exit(sm3_ce_mod_fini);
90