Virtio GPU driver

modulename: virtio-gpu.ko

configname: CONFIG_DRM_VIRTIO_GPU

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>Virtio GPU driver
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This is the virtual GPU driver for virtio. It can be used with
QEMU based VMMs (like KVM or Xen).

If unsure say M.

source code:
drivers/gpu/drm//virtio/