Linux Virtualization - Jan 2017 - [PATCH] virtio-crypto: adjust priority of algorithm

Some hardware accelerators (like intel aseni or the s390
cpacf functions) have lower priorities than virtio
crypto, and those drivers are faster than the same in
the host via virtio. So let's lower the priority of
virtio-crypto's algorithm, make it's higher than sofeware
implimentations but lower than the hardware ones.

Suggested-by: Christian Borntraeger <borntraeger at de.ibm.com>
Signed-off-by: Gonglei <arei.gonglei at huawei.com>
---
 drivers/crypto/virtio/virtio_crypto_algs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c
b/drivers/crypto/virtio/virtio_crypto_algs.c
index 6f40a42..4de4740 100644
--- a/drivers/crypto/virtio/virtio_crypto_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_algs.c
@@ -498,7 +498,7 @@ void virtio_crypto_ablkcipher_finalize_req(
 static struct crypto_alg virtio_crypto_algs[] = { {
 	.cra_name = "cbc(aes)",
 	.cra_driver_name = "virtio_crypto_aes_cbc",
-	.cra_priority = 501,
+	.cra_priority = 150,
 	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
 	.cra_blocksize = AES_BLOCK_SIZE,
 	.cra_ctxsize  = sizeof(struct virtio_crypto_ablkcipher_ctx),
-- 
1.8.3.1

ACK. Whoever takes this patch might want to fixup 3 typos.

On 01/13/2017 07:25 AM, Gonglei wrote:
> Some hardware accelerators (like intel aseni or the s390
					aesni
> cpacf functions) have lower priorities than virtio
> crypto, and those drivers are faster than the same in
> the host via virtio. So let's lower the priority of
> virtio-crypto's algorithm, make it's higher than sofeware
                                                  
software
> implimentations but lower than the hardware ones.
  implementations
> 
> Suggested-by: Christian Borntraeger <borntraeger at de.ibm.com>
> Signed-off-by: Gonglei <arei.gonglei at huawei.com>
> ---
>  drivers/crypto/virtio/virtio_crypto_algs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c
b/drivers/crypto/virtio/virtio_crypto_algs.c
> index 6f40a42..4de4740 100644
> --- a/drivers/crypto/virtio/virtio_crypto_algs.c
> +++ b/drivers/crypto/virtio/virtio_crypto_algs.c
> @@ -498,7 +498,7 @@ void virtio_crypto_ablkcipher_finalize_req(
>  static struct crypto_alg virtio_crypto_algs[] = { {
>  	.cra_name = "cbc(aes)",
>  	.cra_driver_name = "virtio_crypto_aes_cbc",
> -	.cra_priority = 501,
> +	.cra_priority = 150,
>  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
>  	.cra_blocksize = AES_BLOCK_SIZE,
>  	.cra_ctxsize  = sizeof(struct virtio_crypto_ablkcipher_ctx),
>

>
> From: Christian Borntraeger [mailto:borntraeger at de.ibm.com]
> Sent: Friday, January 13, 2017 4:28 PM
> To: Gonglei (Arei); virtualization at lists.linux-foundation.org;
> linux-crypto at vger.kernel.org; linux-kernel at vger.kernel.org
> Cc: mst at redhat.com; herbert at gondor.apana.org.au
> Subject: Re: [PATCH] virtio-crypto: adjust priority of algorithm
> 
> ACK. Whoever takes this patch might want to fixup 3 typos.
> 
Thanks, I'd better send v2 IMHO.  :)

Regards,
-Gonglei
> On 01/13/2017 07:25 AM, Gonglei wrote:
> 
> > Some hardware accelerators (like intel aseni or the s390
> 					aesni
> > cpacf functions) have lower priorities than virtio
> > crypto, and those drivers are faster than the same in
> > the host via virtio. So let's lower the priority of
> > virtio-crypto's algorithm, make it's higher than sofeware
>                                                    software
> > implimentations but lower than the hardware ones.
>   implementations
> >
> > Suggested-by: Christian Borntraeger <borntraeger at de.ibm.com>
> > Signed-off-by: Gonglei <arei.gonglei at huawei.com>
> > ---
> >  drivers/crypto/virtio/virtio_crypto_algs.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c
> b/drivers/crypto/virtio/virtio_crypto_algs.c
> > index 6f40a42..4de4740 100644
> > --- a/drivers/crypto/virtio/virtio_crypto_algs.c
> > +++ b/drivers/crypto/virtio/virtio_crypto_algs.c
> > @@ -498,7 +498,7 @@ void virtio_crypto_ablkcipher_finalize_req(
> >  static struct crypto_alg virtio_crypto_algs[] = { {
> >  	.cra_name = "cbc(aes)",
> >  	.cra_driver_name = "virtio_crypto_aes_cbc",
> > -	.cra_priority = 501,
> > +	.cra_priority = 150,
> >  	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
> >  	.cra_blocksize = AES_BLOCK_SIZE,
> >  	.cra_ctxsize  = sizeof(struct virtio_crypto_ablkcipher_ctx),
> >