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crypto: vmx - Convert to CPU feature based module autoloading 

This patch utilises the GENERIC_CPU_AUTOPROBE infrastructure
to automatically load the vmx_crypto module if the CPU supports
it.

Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Alastair D'Silva 2016-07-19 14:03:53 +10:00 committed by Michael Ellerman
parent 4a1202765d
commit ccf5c442a1
2 changed files with 3 additions and 5 deletions
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2
drivers/crypto/vmx/Kconfig
View File

@ -1,7 +1,7 @@
config CRYPTO_DEV_VMX_ENCRYPT
tristate "Encryption acceleration support on P8 CPU"
depends on CRYPTO_DEV_VMX
default y
default m
help
Support for VMX cryptographic acceleration instructions on Power8 CPU.
This module supports acceleration for AES and GHASH in hardware. If you

6
drivers/crypto/vmx/vmx.c
View File

@ -23,6 +23,7 @@
#include <linux/moduleparam.h>
#include <linux/types.h>
#include <linux/err.h>
#include <linux/cpufeature.h>
#include <linux/crypto.h>
#include <asm/cputable.h>
#include <crypto/internal/hash.h>
@ -43,9 +44,6 @@ 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",
@ -78,7 +76,7 @@ void __exit p8_exit(void)
crypto_unregister_shash(&p8_ghash_alg);
}
module_init(p8_init);
module_cpu_feature_match(PPC_MODULE_FEATURE_VEC_CRYPTO, p8_init);
module_exit(p8_exit);
MODULE_AUTHOR("Marcelo Cerri<mhcerri@br.ibm.com>");