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[CRYPTO] padlock: Helper module padlock.ko

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Compile a helper module padlock.ko that will try
to autoload all configured padlock algorithms.

This also provides backward compatibility with 
the ancient times before padlock.ko was renamed 
to padlock-aes.ko

Signed-off-by: Michal Ludvig <michal@logix.cz>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Michal Ludvig 2006-08-06 22:50:30 +10:00 committed by Herbert Xu
parent cb17530b0a
commit 5644bda5d6
4 changed files with 72 additions and 7 deletions
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17
drivers/crypto/Kconfig
View File

@ -1,10 +1,10 @@
menu "Hardware crypto devices"
config CRYPTO_DEV_PADLOCK
bool "Support for VIA PadLock ACE"
tristate "Support for VIA PadLock ACE"
depends on X86_32
select CRYPTO_ALGAPI
default y
default m
help
Some VIA processors come with an integrated crypto engine
(so called VIA PadLock ACE, Advanced Cryptography Engine)
@ -12,8 +12,17 @@ config CRYPTO_DEV_PADLOCK
operations with supported algorithms.
The instructions are used only when the CPU supports them.
Otherwise software encryption is used. If you are unsure,
say Y.
Otherwise software encryption is used.
Selecting M for this option will compile a helper module
padlock.ko that should autoload all below configured
algorithms. Don't worry if your hardware does not support
some or all of them. In such case padlock.ko will
simply write a single line into the kernel log informing
about its failure but everything will keep working fine.
If you are unsure, say M. The compiled module will be
called padlock.ko
config CRYPTO_DEV_PADLOCK_AES
tristate "PadLock driver for AES algorithm"

1
drivers/crypto/Makefile
View File

@ -1,2 +1,3 @@
obj-$(CONFIG_CRYPTO_DEV_PADLOCK) += padlock.o
obj-$(CONFIG_CRYPTO_DEV_PADLOCK_AES) += padlock-aes.o
obj-$(CONFIG_CRYPTO_DEV_PADLOCK_SHA) += padlock-sha.o

3
drivers/crypto/padlock-aes.c
View File

@ -544,6 +544,3 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michal Ludvig");
MODULE_ALIAS("aes-padlock");
/* This module used to be called padlock. */
MODULE_ALIAS("padlock");

58
drivers/crypto/padlock.c Normal file
View File

@ -0,0 +1,58 @@
/*
* Cryptographic API.
*
* Support for VIA PadLock hardware crypto engine.
*
* Copyright (c) 2006 Michal Ludvig <michal@logix.cz>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/crypto.h>
#include <linux/cryptohash.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>
#include "padlock.h"
static int __init padlock_init(void)
{
int success = 0;
if (crypto_alg_available("aes-padlock", 0))
success++;
if (crypto_alg_available("sha1-padlock", 0))
success++;
if (crypto_alg_available("sha256-padlock", 0))
success++;
if (!success) {
printk(KERN_WARNING PFX "No VIA PadLock drivers have been loaded.\n");
return -ENODEV;
}
printk(KERN_NOTICE PFX "%d drivers are available.\n", success);
return 0;
}
static void __exit padlock_fini(void)
{
}
module_init(padlock_init);
module_exit(padlock_fini);
MODULE_DESCRIPTION("Load all configured PadLock algorithms.");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Michal Ludvig");