drivers/crypto/vmx/vmx.c

   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");