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authorMichal Ludvig <michal@logix.cz>2006-08-06 14:50:30 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2006-09-21 03:41:00 +0200
commit5644bda5d6aa17a70b8842eb56365d501a5da159 (patch)
treeac19f321bdc0dfa081e4ea7348584f516f6a7e7b /drivers
parent[CRYPTO] padlock-sha: Make 2 functions static (diff)
downloadlinux-5644bda5d6aa17a70b8842eb56365d501a5da159.tar.xz
linux-5644bda5d6aa17a70b8842eb56365d501a5da159.zip
[CRYPTO] padlock: Helper module padlock.ko
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/crypto/Kconfig17
-rw-r--r--drivers/crypto/Makefile1
-rw-r--r--drivers/crypto/padlock-aes.c3
-rw-r--r--drivers/crypto/padlock.c58
4 files changed, 72 insertions, 7 deletions
diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index 910c715325be..86c99cd333fa 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -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"
diff --git a/drivers/crypto/Makefile b/drivers/crypto/Makefile
index df498c7d97ab..4c3d0ec1cf80 100644
--- a/drivers/crypto/Makefile
+++ b/drivers/crypto/Makefile
@@ -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
diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index 149e54b0ea2e..3a2a71108d35 100644
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -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");
diff --git a/drivers/crypto/padlock.c b/drivers/crypto/padlock.c
new file mode 100644
index 000000000000..ce581684f4b4
--- /dev/null
+++ b/drivers/crypto/padlock.c
@@ -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");
+