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/crypto.h> 27 #include <asm/cputable.h> 28 #include <crypto/internal/hash.h> 29 30 extern struct shash_alg p8_ghash_alg; 31 extern struct crypto_alg p8_aes_alg; 32 extern struct crypto_alg p8_aes_cbc_alg; 33 extern struct crypto_alg p8_aes_ctr_alg; 34 static struct crypto_alg *algs[] = { 35 &p8_aes_alg, 36 &p8_aes_cbc_alg, 37 &p8_aes_ctr_alg, 38 NULL, 39 }; 40 41 int __init p8_init(void) 42 { 43 int ret = 0; 44 struct crypto_alg **alg_it; 45 46 if (!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_VEC_CRYPTO)) 47 return -ENODEV; 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 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_init(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