[PULL 14/24] vhost-user-gpu: add a configuration flag for dmabuf usage

[Gerd Hoffmann]

From: Marc-André Lureau <marcandre.lur...@redhat.com>

Let's inform VirtioGPUBase that vhost-user-gpu require DMABUF messages.

Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
Message-Id: <20210204105232.834642-11-marcandre.lur...@redhat.com>
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
---
 include/hw/virtio/virtio-gpu.h | 3 +++
 hw/display/vhost-user-gpu.c    | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/include/hw/virtio/virtio-gpu.h b/include/hw/virtio/virtio-gpu.h
index 1aed7275c824..4f3dbf79f9bc 100644
--- a/include/hw/virtio/virtio-gpu.h
+++ b/include/hw/virtio/virtio-gpu.h
@@ -71,6 +71,7 @@ enum virtio_gpu_base_conf_flags {
     VIRTIO_GPU_FLAG_VIRGL_ENABLED = 1,
     VIRTIO_GPU_FLAG_STATS_ENABLED,
     VIRTIO_GPU_FLAG_EDID_ENABLED,
+    VIRTIO_GPU_FLAG_DMABUF_ENABLED,
 };
 
 #define virtio_gpu_virgl_enabled(_cfg) \
@@ -79,6 +80,8 @@ enum virtio_gpu_base_conf_flags {
     (_cfg.flags & (1 << VIRTIO_GPU_FLAG_STATS_ENABLED))
 #define virtio_gpu_edid_enabled(_cfg) \
     (_cfg.flags & (1 << VIRTIO_GPU_FLAG_EDID_ENABLED))
+#define virtio_gpu_dmabuf_enabled(_cfg) \
+    (_cfg.flags & (1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED))
 
 struct virtio_gpu_base_conf {
     uint32_t max_outputs;
diff --git a/hw/display/vhost-user-gpu.c b/hw/display/vhost-user-gpu.c
index dd587436ff34..b7bde9feb614 100644
--- a/hw/display/vhost-user-gpu.c
+++ b/hw/display/vhost-user-gpu.c
@@ -547,6 +547,8 @@ vhost_user_gpu_device_realize(DeviceState *qdev, Error 
**errp)
         return;
     }
 
+    /* existing backend may send DMABUF, so let's add that requirement */
+    g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_DMABUF_ENABLED;
     if (virtio_has_feature(g->vhost->dev.features, VIRTIO_GPU_F_VIRGL)) {
         g->parent_obj.conf.flags |= 1 << VIRTIO_GPU_FLAG_VIRGL_ENABLED;
     }
-- 
2.29.2