QXL virtual GPU

modulename: qxl.ko

configname: CONFIG_DRM_QXL

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>QXL virtual GPU
In linux kernel since version 3.1 (release Date: 2011-10-24)  
QXL virtual GPU for Spice virtualization desktop integration.
Do not enable this driver unless your distro ships a corresponding
X.org QXL driver that can handle kernel modesetting.

source code:
drivers/gpu/drm//qxl/