QEMU \u22658.0 dropped the legacy 'virgl=on' device property in favour of
the more general 'blob=true' which enables the VIRTIO_GPU_F_RESOURCE_BLOB
feature negotiated by the redox-drm virtio backend. Without this,
the device property was silently dropped and the guest received
2D-only KMS without any 3D acceleration.
The new 'blob=true' activates the virgl blob-resource path, matching
the VIRTIO_GPU_F_RESOURCE_BLOB bit that redox-drm already negotiates
on the host-guest boundary.
vasilito
7fde222194