Commit c6959644 authored by Eugenio Pérez's avatar Eugenio Pérez Committed by Michael S. Tsirkin
Browse files

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: default avatarEugenio Pérez <eperezma@redhat.com>
Message-Id: <20230703142514.363256-1-eperezma@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 5dc31bd2

drivers/vdpa/mlx5/net/mlx5_vnet.c

+7 −0
Original line number Diff line number Diff line
@@ -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,