VM passthrough on FreeBSD to run windows
reddit / BSD

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ZeroViBrittania · 2019-02-20 15:19

Hello, I want to run a VM Passthrough on FreeBSD and run windows 10 on
VM. Does anyone know how to do this?

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RaXXu5 · 2019-02-20 16:21

Qemu with virt manager? or is that not available on bsd? should
support iommu I think if you cpu supports it.

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beowuff · 2019-02-20 16:52

Win10 runs fine in bhyve, but last I looked pci pass through wasn’t
working yet. Maybe it is now?

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ZeroViBrittania · 2019-02-20 16:55

Bsd has qemu. I just dont know where to start or how to run it.

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Kernigh · 2019-02-20 18:57

I run qemu from a shell script, like

    #!/bin/sh
    cd "$(dirname "$0")"
    exec qemu-system-i386 -m 1024 \
        -nic user,model=e1000,hostfwd=tcp:127.0.0.1:5426-:22 \
        -usb -device usb-kbd -device usb-tablet \
        -hda dai.qcow2 "$@"

I don't know how to pass through devices from my OpenBSD host to qemu;
it might not be possible in OpenBSD. I have no acceleration: qemu is
emulating a processor, which is much slower than hardware
virtualization.

[FreeBSD's handbook has a chapter on Virtualization](https://www.freeb
sd.org/doc/en_US.ISO8859-1/books/handbook/virtualization.html), which
mentions VirtualBox, bhyve, and Xen. I don't know about them.

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useunix · 2019-03-08 09:59

As far as I know qemu alone won't give you hw passthrough, and
generally speaking you are better off using bhyve these days. The KVM
port was removed a few years ago as it was very old and hard to
maintain. See here [KVM on FreeBSD](https://www.linux-
kvm.org/page/BSD) .

​

Check the following handbook section for setting up [FreeBSD as Host
with bhyve](https://www.freebsd.org/doc/handbook/virtualization-host-
bhyve.html).

​

However, I still prefer using Xen and dom0 on [FreeBSD as hypervisor
host](https://www.freebsd.org/doc/handbook/virtualization-host-
xen.html).