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crypto: vmx - Adding VMX module for Power 8

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This patch adds routines supporting VMX instructions on the
Power 8.

Signed-off-by: Leonidas S. Barbosa <leosilva@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Marcelo H. Cerri 2015-02-06 14:56:50 -02:00 committed by Herbert Xu
parent 66c046b407
commit 20a26faa7e
1 changed files with 88 additions and 0 deletions
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drivers/crypto/vmx/vmx.c Normal file
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/**
* Routines supporting VMX instructions on the Power 8
*
* Copyright (C) 2015 International Business Machines Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 only.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/err.h>
#include <linux/crypto.h>
#include <asm/cputable.h>
#include <crypto/internal/hash.h>
extern struct shash_alg p8_ghash_alg;
extern struct crypto_alg p8_aes_alg;
extern struct crypto_alg p8_aes_cbc_alg;
extern struct crypto_alg p8_aes_ctr_alg;
static struct crypto_alg *algs[] = {
&p8_aes_alg,
&p8_aes_cbc_alg,
&p8_aes_ctr_alg,
NULL,
};
int __init p8_init(void)
{
int ret = 0;
struct crypto_alg **alg_it;
if (!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_VEC_CRYPTO))
return -ENODEV;
for (alg_it = algs; *alg_it; alg_it++) {
ret = crypto_register_alg(*alg_it);
printk(KERN_INFO "crypto_register_alg '%s' = %d\n",
(*alg_it)->cra_name, ret);
if (ret) {
for (alg_it--; alg_it >= algs; alg_it--)
crypto_unregister_alg(*alg_it);
break;
}
}
if (ret)
return ret;
ret = crypto_register_shash(&p8_ghash_alg);
if (ret) {
for (alg_it = algs; *alg_it; alg_it++)
crypto_unregister_alg(*alg_it);
}
return ret;
}
void __exit p8_exit(void)
{
struct crypto_alg **alg_it;
for (alg_it = algs; *alg_it; alg_it++) {
printk(KERN_INFO "Removing '%s'\n", (*alg_it)->cra_name);
crypto_unregister_alg(*alg_it);
}
crypto_unregister_shash(&p8_ghash_alg);
}
module_init(p8_init);
module_exit(p8_exit);
MODULE_AUTHOR("Marcelo Cerri<mhcerri@br.ibm.com>");
MODULE_DESCRIPTION("IBM VMX cryptogaphic acceleration instructions support on Power 8");
MODULE_LICENSE("GPL");
MODULE_VERSION("1.0.0");