[Bug] virtio-gpu broken with qemu/kvm on arm64 on kernel 5.5+

[Gerd Hoffmann]

  Hi,

> > Perhaps try the entire series?
> > 
> > https://patchwork.kernel.org/cover/11300619/

Latest version is at:
   https://git.kraxel.org/cgit/linux/log/?h=drm-virtio-no-wc

> Applied entire series on top of 5.5.6, but still the same problem.

Can you double-check?  Cherry-picking the shmem + virtio patches ...

  694c824491f1 drm/shmem: add support for per object caching flags.
  3f4d10f853fb drm/virtio: fix mmap page attributes

... into 5.6-rc3 fixes the corruption for me.

cheers,
  Gerd