[RFC PATCH v2 8/8] vdpa: Offer VIRTIO_NET_F_GUEST_ANNOUNCE feature if SVQ is enabled

From: "Eugenio Pérez" <eperezma@redhat.com>
To: qemu-devel@nongnu.org
Cc: Zhu Lingshan <lingshan.zhu@intel.com>,
	Harpreet Singh Anand <hanand@xilinx.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	Si-Wei Liu <si-wei.liu@oracle.com>,
	Jason Wang <jasowang@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>, Cindy Lu <lulu@redhat.com>,
	Laurent Vivier <lvivier@redhat.com>, Eli Cohen <eli@mellanox.com>,
	Liuxiangdong <liuxiangdong5@huawei.com>,
	Parav Pandit <parav@mellanox.com>,
	Gautam Dawar <gdawar@xilinx.com>
Subject: [RFC PATCH v2 8/8] vdpa: Offer VIRTIO_NET_F_GUEST_ANNOUNCE feature if SVQ is enabled
Date: Wed, 19 Oct 2022 14:52:10 +0200	[thread overview]
Message-ID: <20221019125210.226291-9-eperezma@redhat.com> (raw)
In-Reply-To: <20221019125210.226291-1-eperezma@redhat.com>

So qemu emulates it in case the device does not support it.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 net/vhost-vdpa.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 5fda405a66..64442e8455 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -566,6 +566,9 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
 
         /* VIRTIO_NET_F_STATUS is mandatory for _F_GUEST_ANNOUNCE. */
         s->vhost_vdpa.added_features |= BIT_ULL(VIRTIO_NET_F_STATUS);
+
+        /* We can emulate guest announce shadowing CVQ */
+        s->vhost_vdpa.added_features |= BIT_ULL(VIRTIO_NET_F_GUEST_ANNOUNCE);
     }
     if (!is_datapath) {
         s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(),
-- 
2.31.1


