[PATCH v3 20/38] vhost/vdpa: switch to new helpers

[PATCH v3 20/38] vhost/vdpa: switch to new helpers

[Michael S. Tsirkin]

For new helpers handling legacy features to be effective,
vhost needs to invoke them. Tie them in.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vhost/vdpa.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 18869a35d408..3674404688f5 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -118,9 +118,8 @@ static irqreturn_t vhost_vdpa_config_cb(void *private)
 static void vhost_vdpa_reset(struct vhost_vdpa *v)
 {
 	struct vdpa_device *vdpa = v->vdpa;
-	const struct vdpa_config_ops *ops = vdpa->config;
 
-	ops->set_status(vdpa, 0);
+	vdpa_reset(vdpa);
 }
 
 static long vhost_vdpa_get_device_id(struct vhost_vdpa *v, u8 __user *argp)
@@ -196,7 +195,6 @@ static long vhost_vdpa_get_config(struct vhost_vdpa *v,
 				  struct vhost_vdpa_config __user *c)
 {
 	struct vdpa_device *vdpa = v->vdpa;
-	const struct vdpa_config_ops *ops = vdpa->config;
 	struct vhost_vdpa_config config;
 	unsigned long size = offsetof(struct vhost_vdpa_config, buf);
 	u8 *buf;
@@ -209,7 +207,7 @@ static long vhost_vdpa_get_config(struct vhost_vdpa *v,
 	if (!buf)
 		return -ENOMEM;
 
-	ops->get_config(vdpa, config.off, buf, config.len);
+	vdpa_get_config(vdpa, config.off, buf, config.len);
 
 	if (copy_to_user(c->buf, buf, config.len)) {
 		kvfree(buf);
@@ -282,7 +280,7 @@ static long vhost_vdpa_set_features(struct vhost_vdpa *v, u64 __user *featurep)
 	if (features & ~vhost_vdpa_features[v->virtio_id])
 		return -EINVAL;
 
-	if (ops->set_features(vdpa, features))
+	if (vdpa_set_features(vdpa, features))
 		return -EINVAL;
 
 	return 0;
-- 
MST

[PATCH v3 38/38] virtio_net: use LE accessors for speed/duplex

[Michael S. Tsirkin]

Speed and duplex config fields depend on VIRTIO_NET_F_SPEED_DUPLEX
which being 63>31 depends on VIRTIO_F_VERSION_1.

Accordingly, use LE accessors for these fields.

Reported-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/net/virtio_net.c        | 9 +++++----
 include/uapi/linux/virtio_net.h | 2 +-
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index ba38765dc490..0934b1ec5320 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2264,12 +2264,13 @@ static void virtnet_update_settings(struct virtnet_info *vi)
 	if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_SPEED_DUPLEX))
 		return;
 
-	speed = virtio_cread32(vi->vdev, offsetof(struct virtio_net_config,
-						  speed));
+	virtio_cread_le(vi->vdev, struct virtio_net_config, speed, &speed);
+
 	if (ethtool_validate_speed(speed))
 		vi->speed = speed;
-	duplex = virtio_cread8(vi->vdev, offsetof(struct virtio_net_config,
-						  duplex));
+
+	virtio_cread_le(vi->vdev, struct virtio_net_config, duplex, &duplex);
+
 	if (ethtool_validate_duplex(duplex))
 		vi->duplex = duplex;
 }
diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h
index 27d996f29dd1..3f55a4215f11 100644
--- a/include/uapi/linux/virtio_net.h
+++ b/include/uapi/linux/virtio_net.h
@@ -99,7 +99,7 @@ struct virtio_net_config {
 	 * speed, in units of 1Mb. All values 0 to INT_MAX are legal.
 	 * Any other value stands for unknown.
 	 */
-	__virtio32 speed;
+	__le32 speed;
 	/*
 	 * 0x00 - half duplex
 	 * 0x01 - full duplex
-- 
MST

Re: [PATCH v3 38/38] virtio_net: use LE accessors for speed/duplex

[Cornelia Huck]

On Wed, 5 Aug 2020 09:45:00 -0400
"Michael S. Tsirkin" <mst@redhat.com> wrote:

> Speed and duplex config fields depend on VIRTIO_NET_F_SPEED_DUPLEX
> which being 63>31 depends on VIRTIO_F_VERSION_1.
> 
> Accordingly, use LE accessors for these fields.
> 
> Reported-by: Cornelia Huck <cohuck@redhat.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
>  drivers/net/virtio_net.c        | 9 +++++----
>  include/uapi/linux/virtio_net.h | 2 +-
>  2 files changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index ba38765dc490..0934b1ec5320 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -2264,12 +2264,13 @@ static void virtnet_update_settings(struct virtnet_info *vi)
>  	if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_SPEED_DUPLEX))
>  		return;
>  
> -	speed = virtio_cread32(vi->vdev, offsetof(struct virtio_net_config,
> -						  speed));
> +	virtio_cread_le(vi->vdev, struct virtio_net_config, speed, &speed);
> +
>  	if (ethtool_validate_speed(speed))
>  		vi->speed = speed;
> -	duplex = virtio_cread8(vi->vdev, offsetof(struct virtio_net_config,
> -						  duplex));
> +
> +	virtio_cread_le(vi->vdev, struct virtio_net_config, duplex, &duplex);

Looks a bit odd for an u8, but does not really hurt.

> +
>  	if (ethtool_validate_duplex(duplex))
>  		vi->duplex = duplex;
>  }
> diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h
> index 27d996f29dd1..3f55a4215f11 100644
> --- a/include/uapi/linux/virtio_net.h
> +++ b/include/uapi/linux/virtio_net.h
> @@ -99,7 +99,7 @@ struct virtio_net_config {
>  	 * speed, in units of 1Mb. All values 0 to INT_MAX are legal.
>  	 * Any other value stands for unknown.
>  	 */
> -	__virtio32 speed;
> +	__le32 speed;
>  	/*
>  	 * 0x00 - half duplex
>  	 * 0x01 - full duplex

Reviewed-by: Cornelia Huck <cohuck@redhat.com>