According to an article titled ‘What's new and nifty in Linux 4.4’ ,it says
People who run Linux in a virtual machine (VM) will be pleased that the new virtio-gpu driver enables virtualization guests to use the host graphics card efficiently. "In this release, it allows the virtualization guest to use the capabilities
of the host GPU to accelerate 3D rendering. In practice, this means that a virtualized Linux guest can run a game while using the host's GPU acceleration,. This makes running games on Linux VMs much faster. To use this you'll need a VM that uses Linux's native
VM hypervisor, KVM, and QEMU 2.5."
Does anyone use it and do you gain good gpu passthru efficiency as it claims? Thanks.