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mlx5_vdpa: offer VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK
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>
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@ -7,6 +7,7 @@
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#include <uapi/linux/virtio_net.h>
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#include <uapi/linux/virtio_ids.h>
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#include <uapi/linux/vdpa.h>
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#include <uapi/linux/vhost_types.h>
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#include <linux/virtio_config.h>
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#include <linux/auxiliary_bus.h>
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#include <linux/mlx5/cq.h>
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@ -2559,6 +2560,11 @@ static void unregister_link_notifier(struct mlx5_vdpa_net *ndev)
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flush_workqueue(ndev->mvdev.wq);
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}
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static u64 mlx5_vdpa_get_backend_features(const struct vdpa_device *vdpa)
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{
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return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
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}
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static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
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{
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struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
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@ -3234,6 +3240,7 @@ static const struct vdpa_config_ops mlx5_vdpa_ops = {
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.get_vq_group = mlx5_vdpa_get_vq_group,
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.get_vq_desc_group = mlx5_vdpa_get_vq_desc_group, /* Op disabled if not supported. */
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.get_device_features = mlx5_vdpa_get_device_features,
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.get_backend_features = mlx5_vdpa_get_backend_features,
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.set_driver_features = mlx5_vdpa_set_driver_features,
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.get_driver_features = mlx5_vdpa_get_driver_features,
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.set_config_cb = mlx5_vdpa_set_config_cb,
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