Re: [PATCH 1/3] virtio-gpu uapi: Add VIRTIO_GPU_F_EXPLICIT_FLUSH feature

On Tue, May 11, 2021 at 01:36:08AM -0700, Vivek Kasireddy wrote:

This feature enables the Guest to wait until a flush has been performed on a buffer it has submitted to the Host.

This needs a virtio-spec update documenting the new feature.

• VIRTIO_GPU_CMD_WAIT_FLUSH,

Why a new command?

If I understand it correctly you want wait until VIRTIO_GPU_CMD_RESOURCE_FLUSH is done. We could extend the VIRTIO_GPU_CMD_RESOURCE_FLUSH command for that instead.

take care, Gerd