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mlx5_vdpa: offer VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK

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Offer this backend feature as mlx5 is compatible with it. It allows it
to do live migration with CVQ, dynamically switching between passthrough
and shadow virtqueue.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230703142514.363256-1-eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Eugenio Pérez 2023-07-03 16:25:14 +02:00 committed by Michael S. Tsirkin
parent 5dc31bd245
commit c695964474
1 changed files with 7 additions and 0 deletions
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7
drivers/vdpa/mlx5/net/mlx5_vnet.c
View file

@ -7,6 +7,7 @@
#include <uapi/linux/virtio_net.h>
#include <uapi/linux/virtio_ids.h>
#include <uapi/linux/vdpa.h>
#include <uapi/linux/vhost_types.h>
#include <linux/virtio_config.h>
#include <linux/auxiliary_bus.h>
#include <linux/mlx5/cq.h>
@ -2559,6 +2560,11 @@ static void unregister_link_notifier(struct mlx5_vdpa_net *ndev)
flush_workqueue(ndev->mvdev.wq);
}
static u64 mlx5_vdpa_get_backend_features(const struct vdpa_device *vdpa)
{
return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
}
static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
@ -3234,6 +3240,7 @@ static const struct vdpa_config_ops mlx5_vdpa_ops = {
.get_vq_group = mlx5_vdpa_get_vq_group,
.get_vq_desc_group = mlx5_vdpa_get_vq_desc_group, /* Op disabled if not supported. */
.get_device_features = mlx5_vdpa_get_device_features,
.get_backend_features = mlx5_vdpa_get_backend_features,
.set_driver_features = mlx5_vdpa_set_driver_features,
.get_driver_features = mlx5_vdpa_get_driver_features,
.set_config_cb = mlx5_vdpa_set_config_cb,