Mouse cursor is flipped / inverted / upside-down with virtio-gpu in some Wayland compositors
Description of problem:
The mouse cursor is flipped:
Steps to reproduce:
1. Install a Linux system with a 6.8.x kernel inside the virtual machine
2. Install sway / wayfire / hyprland, or kwin 6.0.4.1
3. See the mouse cursor
Additional information:
The [kwin fix](https://invent.kde.org/plasma/kwin/-/commit/a31561c392adf5abcda0284e8049fafcb3701585) just makes use of dumb buffers instead of dmabuf.

The mouse cursor should be pointing to the maximizing button at the top-right corner:
![Screenshot](/uploads/f1c3db2129955159e9ce765dd29ae9eb/a.png)