From: alastair@au1.ibm.com Subject: [PATCH 2/2] Automatically load the vmx_crypto module if supported. Date: Wed, 13 Jul 2016 15:47:19 +1000 Message-ID: <1468388840-12068-4-git-send-email-alastair@au1.ibm.com> References: <1468388840-12068-1-git-send-email-alastair@au1.ibm.com> Cc: benh@kernel.crashing.org, paulus@samba.org, herbert@gondor.apana.org.au, davem@davemloft.net, linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, "Alastair D'Silva" To: mpe@ellerman.id.au Return-path: In-Reply-To: <1468388840-12068-1-git-send-email-alastair@au1.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org From: Alastair D'Silva 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 --- drivers/crypto/vmx/Kconfig | 2 +- drivers/crypto/vmx/vmx.c | 6 ++---- 2 files changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/crypto/vmx/Kconfig b/drivers/crypto/vmx/Kconfig index 89d8208..a83ead1 100644 --- a/drivers/crypto/vmx/Kconfig +++ b/drivers/crypto/vmx/Kconfig @@ -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 diff --git a/drivers/crypto/vmx/vmx.c b/drivers/crypto/vmx/vmx.c index e163d57..5a40f2f 100644 --- a/drivers/crypto/vmx/vmx.c +++ b/drivers/crypto/vmx/vmx.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -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"); -- 2.7.4