I have a mid-2015 15" Macbook Pro. The iGPU is part of Intel's Iris Pro brand, which as I understand allows a VM to access the GPU directly with a native driver through GVT-d.
I would like to run a Linux guest OS in this manner, giving it native access to the iGPU so that it can run a native driver (and thus have OpenGL 4.3 support). I have no idea how to go about doing this, though. I've heard there are forks of QEMU/KVM with GVT included, but I have no idea how to go about setting up a VM with one of those.