Received-SPF: pass (google.com: domain of linux-kernel+bounces-22764-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3;
From: Steve Sistare <steven.sistare@oracle.com>
To: virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Cc: "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com>,
        Si-Wei Liu <si-wei.liu@oracle.com>,
        Eugenio Perez Martin <eperezma@redhat.com>,
        Xuan Zhuo <xuanzhuo@linux.alibaba.com>,
        Dragos Tatulea <dtatulea@nvidia.com>, Eli Cohen <elic@nvidia.com>,
        Xie Yongji <xieyongji@bytedance.com>,
        Steve Sistare <steven.sistare@oracle.com>
Subject: [RFC V1 11/13] vdpa/mlx5: new owner capability
Date: Wed, 10 Jan 2024 12:40:13 -0800
Message-Id: <1704919215-91319-12-git-send-email-steven.sistare@oracle.com>
In-Reply-To: <1704919215-91319-1-git-send-email-steven.sistare@oracle.com>
References: <1704919215-91319-1-git-send-email-steven.sistare@oracle.com>
Precedence: bulk

The mlx5 vdpa device supports ownership transfer to a new process, so
advertise VHOST_BACKEND_F_NEW_OWNER.  User virtual addresses are not
used after they are initially translated to physical, so VHOST_IOTLB_REMAP
is not required, hence VHOST_BACKEND_F_IOTLB_REMAP is not advertised.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 26ba7da6b410..26f24fb0e160 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -2562,7 +2562,8 @@ static void unregister_link_notifier(struct mlx5_vdpa_net *ndev)
 
 static u64 mlx5_vdpa_get_backend_features(const struct vdpa_device *vdpa)
 {
-	return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK);
+	return BIT_ULL(VHOST_BACKEND_F_ENABLE_AFTER_DRIVER_OK) |
+	       BIT_ULL(VHOST_BACKEND_F_NEW_OWNER);
 }
 
 static int mlx5_vdpa_set_driver_features(struct vdpa_device *vdev, u64 features)
-- 
2.39.3