xref: /openbmc/linux/drivers/crypto/vmx/vmx.c (revision 151f4e2b)
1 /**
2  * Routines supporting VMX instructions on the Power 8
3  *
4  * Copyright (C) 2015 International Business Machines Inc.
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 only.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  *
19  * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
20  */
21 
22 #include <linux/module.h>
23 #include <linux/moduleparam.h>
24 #include <linux/types.h>
25 #include <linux/err.h>
26 #include <linux/cpufeature.h>
27 #include <linux/crypto.h>
28 #include <asm/cputable.h>
29 #include <crypto/internal/hash.h>
30 
31 extern struct shash_alg p8_ghash_alg;
32 extern struct crypto_alg p8_aes_alg;
33 extern struct crypto_alg p8_aes_cbc_alg;
34 extern struct crypto_alg p8_aes_ctr_alg;
35 extern struct crypto_alg p8_aes_xts_alg;
36 static struct crypto_alg *algs[] = {
37 	&p8_aes_alg,
38 	&p8_aes_cbc_alg,
39 	&p8_aes_ctr_alg,
40 	&p8_aes_xts_alg,
41 	NULL,
42 };
43 
44 static int __init p8_init(void)
45 {
46 	int ret = 0;
47 	struct crypto_alg **alg_it;
48 
49 	for (alg_it = algs; *alg_it; alg_it++) {
50 		ret = crypto_register_alg(*alg_it);
51 		printk(KERN_INFO "crypto_register_alg '%s' = %d\n",
52 		       (*alg_it)->cra_name, ret);
53 		if (ret) {
54 			for (alg_it--; alg_it >= algs; alg_it--)
55 				crypto_unregister_alg(*alg_it);
56 			break;
57 		}
58 	}
59 	if (ret)
60 		return ret;
61 
62 	ret = crypto_register_shash(&p8_ghash_alg);
63 	if (ret) {
64 		for (alg_it = algs; *alg_it; alg_it++)
65 			crypto_unregister_alg(*alg_it);
66 	}
67 	return ret;
68 }
69 
70 static void __exit p8_exit(void)
71 {
72 	struct crypto_alg **alg_it;
73 
74 	for (alg_it = algs; *alg_it; alg_it++) {
75 		printk(KERN_INFO "Removing '%s'\n", (*alg_it)->cra_name);
76 		crypto_unregister_alg(*alg_it);
77 	}
78 	crypto_unregister_shash(&p8_ghash_alg);
79 }
80 
81 module_cpu_feature_match(PPC_MODULE_FEATURE_VEC_CRYPTO, p8_init);
82 module_exit(p8_exit);
83 
84 MODULE_AUTHOR("Marcelo Cerri<mhcerri@br.ibm.com>");
85 MODULE_DESCRIPTION("IBM VMX cryptographic acceleration instructions "
86 		   "support on Power 8");
87 MODULE_LICENSE("GPL");
88 MODULE_VERSION("1.0.0");
89