OSS
virtio-nvgpu forwards NVIDIA driver ioctls into KVM guests and measures 98-100% of bare-metal performance on GPU-bound frames
Nestri Labs' experimental device lets a guest run NVIDIA's unmodified user-mode libraries. It forwards /dev/nvidia* ioctls over a virtqueue and averages one host crossing per 59 frames. On an RTX 3060, four VMs split one card evenly. The README states the main caveat: there is no IOMMU boundary, so the host NVIDIA driver sits in the guest's trusted computing base. It got 115 points on HN and is relevant to anyone who wants GPU access for sandboxed agents without full passthrough.
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