Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / arm / crypto / sha2-ce-glue.c
blobdf4dcef054aea4e237a1713f5523f88b3ea0de09
1 /*
2 * sha2-ce-glue.c - SHA-224/SHA-256 using ARMv8 Crypto Extensions
4 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
11 #include <crypto/internal/hash.h>
12 #include <crypto/sha.h>
13 #include <crypto/sha256_base.h>
14 #include <linux/cpufeature.h>
15 #include <linux/crypto.h>
16 #include <linux/module.h>
18 #include <asm/hwcap.h>
19 #include <asm/simd.h>
20 #include <asm/neon.h>
21 #include <asm/unaligned.h>
23 #include "sha256_glue.h"
25 MODULE_DESCRIPTION("SHA-224/SHA-256 secure hash using ARMv8 Crypto Extensions");
26 MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
27 MODULE_LICENSE("GPL v2");
29 asmlinkage void sha2_ce_transform(struct sha256_state *sst, u8 const *src,
30 int blocks);
32 static int sha2_ce_update(struct shash_desc *desc, const u8 *data,
33 unsigned int len)
35 struct sha256_state *sctx = shash_desc_ctx(desc);
37 if (!may_use_simd() ||
38 (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE)
39 return crypto_sha256_arm_update(desc, data, len);
41 kernel_neon_begin();
42 sha256_base_do_update(desc, data, len,
43 (sha256_block_fn *)sha2_ce_transform);
44 kernel_neon_end();
46 return 0;
49 static int sha2_ce_finup(struct shash_desc *desc, const u8 *data,
50 unsigned int len, u8 *out)
52 if (!may_use_simd())
53 return crypto_sha256_arm_finup(desc, data, len, out);
55 kernel_neon_begin();
56 if (len)
57 sha256_base_do_update(desc, data, len,
58 (sha256_block_fn *)sha2_ce_transform);
59 sha256_base_do_finalize(desc, (sha256_block_fn *)sha2_ce_transform);
60 kernel_neon_end();
62 return sha256_base_finish(desc, out);
65 static int sha2_ce_final(struct shash_desc *desc, u8 *out)
67 return sha2_ce_finup(desc, NULL, 0, out);
70 static struct shash_alg algs[] = { {
71 .init = sha224_base_init,
72 .update = sha2_ce_update,
73 .final = sha2_ce_final,
74 .finup = sha2_ce_finup,
75 .descsize = sizeof(struct sha256_state),
76 .digestsize = SHA224_DIGEST_SIZE,
77 .base = {
78 .cra_name = "sha224",
79 .cra_driver_name = "sha224-ce",
80 .cra_priority = 300,
81 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
82 .cra_blocksize = SHA256_BLOCK_SIZE,
83 .cra_module = THIS_MODULE,
85 }, {
86 .init = sha256_base_init,
87 .update = sha2_ce_update,
88 .final = sha2_ce_final,
89 .finup = sha2_ce_finup,
90 .descsize = sizeof(struct sha256_state),
91 .digestsize = SHA256_DIGEST_SIZE,
92 .base = {
93 .cra_name = "sha256",
94 .cra_driver_name = "sha256-ce",
95 .cra_priority = 300,
96 .cra_flags = CRYPTO_ALG_TYPE_SHASH,
97 .cra_blocksize = SHA256_BLOCK_SIZE,
98 .cra_module = THIS_MODULE,
100 } };
102 static int __init sha2_ce_mod_init(void)
104 return crypto_register_shashes(algs, ARRAY_SIZE(algs));
107 static void __exit sha2_ce_mod_fini(void)
109 crypto_unregister_shashes(algs, ARRAY_SIZE(algs));
112 module_cpu_feature_match(SHA2, sha2_ce_mod_init);
113 module_exit(sha2_ce_mod_fini);