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How likely is this to work? KVM/VFIO Single GPU Passthrough (www.youtube.com)
submitted 2 years ago* by to c/linux@lemmy.ml
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I've been wanting to make a proper switch over to Linux for a while now. I've currently have a dual-boot setup but still mostly use Windows. The majority of my games should work without fuss, but I'd like to have a simple solution for running the handful of things that don't work in Linux, such as my WMR VR headset and a handful of Steam games.

Linked is a video on Single GPU passthrough with KVM/VFIO, which I'd like to try.

Before I try this, I'd like a sense of how likely it is to work, and I'm wondering if there might be a better solution I don't know of. I'm also open to any tips you might have about speeding up the transition between Host/Guest OS.

Here are the specs of my machine:

Motherboard: MSI B550 A-Pro

CPU: AMD Ryzen 7 3700X (no integrated graphics)

GPU: Nvidia GeForce RTX 3070

RAM: 32GB DDR4 3200MHz

Host OS: Manjaro

Guest OS: Windows 10 Pro

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[–] 3 points 2 years ago (1 child)

I do this for testing graphics code on different OS/GPU combos - I have an AMD and Nvidia GPU (hoping to add an Intel one eventually) which can each be passed through to Windows or Linux VMs as needed. It works like a charm, with the only minor issue being that I have to use separate monitors for each because I can't seem to figure out how to get the GPU output to be forwarded to the virt-manager virtual console window.

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  • [–] 2 points 2 years ago* (1 child)

    I don't know if you can do it in software with passthrough, as the guest controls the hardware and would need to coordinate things.

    Using a KVM would be a hardware solution that would permit for one monitor, though.

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  • [–] 2 points 2 years ago (1 child)

    I considered a KVM or something similar, but I still need access to the host machine in parallel (ideally side-by-side so I can step through the code running in the guest from a debugger in my dev environment on the host). I've already got a multi-monitor setup, so dedicating one of them to a VM while testing stuff isn't too much of a big deal - I just have to keep track of whether or not my hands are on separate keyboard+mouse for the guest :)

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  • [–] 1 point 2 years ago* (last edited 2 years ago)

    Ah, I gotcha. One keyboard/mouse, VM guest output in a window on the host would be ideal.

    Run a VNC or RDP server on the guest VM, connect with a client on the host? That won't have quite the performance -- if you're debugging a 3d game and playing it as part of it, you'll get latency, so that won't be a good solution for OP -- but that may not matter for your use case.

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