[PATCH v13 10/13] virtio-gpu: Support suspension of commands processing

[Dmitry Osipenko <dmitry.osipenko@collabora.com>]

Check whether command processing has been finished; otherwise, stop
processing commands and retry the command again next time. This allows
us to support asynchronous execution of non-fenced commands needed for
unmapping host blobs safely.

Suggested-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
---
 hw/display/virtio-gpu.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/display/virtio-gpu.c b/hw/display/virtio-gpu.c
index f3d2def9a49f..8e05a2d0c7c5 100644
--- a/hw/display/virtio-gpu.c
+++ b/hw/display/virtio-gpu.c
@@ -1054,6 +1054,11 @@ void virtio_gpu_process_cmdq(VirtIOGPU *g)
         /* process command */
         vgc->process_cmd(g, cmd);
 
+        /* command suspended */
+        if (!cmd->finished && !(cmd->cmd_hdr.flags & VIRTIO_GPU_FLAG_FENCE)) {
+            break;
+        }
+
         QTAILQ_REMOVE(&g->cmdq, cmd, next);
         if (virtio_gpu_stats_enabled(g->parent_obj.conf)) {
             g->stats.requests++;
-- 
2.44.0