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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2014-01-24 16:17:56 -0600 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-02-09 09:59:15 +0800 |
| commit | d81ed6534fd988a8a24fb607b459444d4b3d391a (patch) | |
| tree | 2aa7c861542ded81d5c1c1ebb7bd82bde357ed60 /drivers/crypto/ccp | |
| parent | 80e84c16e72a0eac30085322b4664b7b6b0dde75 (diff) | |
| download | lwn-d81ed6534fd988a8a24fb607b459444d4b3d391a.tar.gz lwn-d81ed6534fd988a8a24fb607b459444d4b3d391a.zip | |
crypto: ccp - Allow for selective disablement of crypto API algorithms
Introduce module parameters that allow for disabling of a
crypto algorithm by not registering the algorithm with the
crypto API.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp')
| -rw-r--r-- | drivers/crypto/ccp/ccp-crypto-main.c | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/drivers/crypto/ccp/ccp-crypto-main.c b/drivers/crypto/ccp/ccp-crypto-main.c index 2636f044789d..b3f22b07b5bd 100644 --- a/drivers/crypto/ccp/ccp-crypto-main.c +++ b/drivers/crypto/ccp/ccp-crypto-main.c @@ -11,6 +11,7 @@ */ #include <linux/module.h> +#include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/list.h> #include <linux/ccp.h> @@ -24,6 +25,14 @@ MODULE_LICENSE("GPL"); MODULE_VERSION("1.0.0"); MODULE_DESCRIPTION("AMD Cryptographic Coprocessor crypto API support"); +static unsigned int aes_disable; +module_param(aes_disable, uint, 0444); +MODULE_PARM_DESC(aes_disable, "Disable use of AES - any non-zero value"); + +static unsigned int sha_disable; +module_param(sha_disable, uint, 0444); +MODULE_PARM_DESC(sha_disable, "Disable use of SHA - any non-zero value"); + /* List heads for the supported algorithms */ static LIST_HEAD(hash_algs); @@ -337,21 +346,25 @@ static int ccp_register_algs(void) { int ret; - ret = ccp_register_aes_algs(&cipher_algs); - if (ret) - return ret; + if (!aes_disable) { + ret = ccp_register_aes_algs(&cipher_algs); + if (ret) + return ret; - ret = ccp_register_aes_cmac_algs(&hash_algs); - if (ret) - return ret; + ret = ccp_register_aes_cmac_algs(&hash_algs); + if (ret) + return ret; - ret = ccp_register_aes_xts_algs(&cipher_algs); - if (ret) - return ret; + ret = ccp_register_aes_xts_algs(&cipher_algs); + if (ret) + return ret; + } - ret = ccp_register_sha_algs(&hash_algs); - if (ret) - return ret; + if (!sha_disable) { + ret = ccp_register_sha_algs(&hash_algs); + if (ret) + return ret; + } return 0; } |