1 // SPDX-License-Identifier: GPL-2.0-only 2 /** 3 * Routines supporting VMX instructions on the Power 8 4 * 5 * Copyright (C) 2015 International Business Machines Inc. 6 * 7 * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com> 8 */ 9 10 #include <linux/module.h> 11 #include <linux/moduleparam.h> 12 #include <linux/types.h> 13 #include <linux/err.h> 14 #include <linux/cpufeature.h> 15 #include <linux/crypto.h> 16 #include <asm/cputable.h> 17 #include <crypto/internal/hash.h> 18 19 extern struct shash_alg p8_ghash_alg; 20 extern struct crypto_alg p8_aes_alg; 21 extern struct crypto_alg p8_aes_cbc_alg; 22 extern struct crypto_alg p8_aes_ctr_alg; 23 extern struct crypto_alg p8_aes_xts_alg; 24 static struct crypto_alg *algs[] = { 25 &p8_aes_alg, 26 &p8_aes_cbc_alg, 27 &p8_aes_ctr_alg, 28 &p8_aes_xts_alg, 29 NULL, 30 }; 31 32 static int __init p8_init(void) 33 { 34 int ret = 0; 35 struct crypto_alg **alg_it; 36 37 for (alg_it = algs; *alg_it; alg_it++) { 38 ret = crypto_register_alg(*alg_it); 39 printk(KERN_INFO "crypto_register_alg '%s' = %d\n", 40 (*alg_it)->cra_name, ret); 41 if (ret) { 42 for (alg_it--; alg_it >= algs; alg_it--) 43 crypto_unregister_alg(*alg_it); 44 break; 45 } 46 } 47 if (ret) 48 return ret; 49 50 ret = crypto_register_shash(&p8_ghash_alg); 51 if (ret) { 52 for (alg_it = algs; *alg_it; alg_it++) 53 crypto_unregister_alg(*alg_it); 54 } 55 return ret; 56 } 57 58 static void __exit p8_exit(void) 59 { 60 struct crypto_alg **alg_it; 61 62 for (alg_it = algs; *alg_it; alg_it++) { 63 printk(KERN_INFO "Removing '%s'\n", (*alg_it)->cra_name); 64 crypto_unregister_alg(*alg_it); 65 } 66 crypto_unregister_shash(&p8_ghash_alg); 67 } 68 69 module_cpu_feature_match(PPC_MODULE_FEATURE_VEC_CRYPTO, p8_init); 70 module_exit(p8_exit); 71 72 MODULE_AUTHOR("Marcelo Cerri<mhcerri@br.ibm.com>"); 73 MODULE_DESCRIPTION("IBM VMX cryptographic acceleration instructions " 74 "support on Power 8"); 75 MODULE_LICENSE("GPL"); 76 MODULE_VERSION("1.0.0"); 77