November 19, 20223 yr Hi all, I am attempting to passthrough a 2nd 2 port BCM5709 Gigabit Ethernet NIC to a pfSense VM (wanting to try pfSense on a VM before building a dedicated box for it) and I keep getting this error. Google suggests that I add append vfio_iommu_type1.allow_unsafe_interrupts=1 vfio-pci.ids=14e4:1639 initrd=/bzroot to my syslinux.cfg file, but I continue to get errors when attempting to boot the VM. I have also confirmed that my new nic shows up as only one IOMMU group. Any thoughts on what else I can do to get this NIC to passthrough correctly? I have also attached a diagnostics.zip file. Thanks for any ideas. tower-diagnostics-20221119-1215.zip
November 19, 20223 yr Author Solution Amazing what hitting the 'apply' button will do. To anybody else running into this issue, after doing the above, also set PCIe ACS override to downstream. I originally thought I had tried this even though I thought I didn't need to since my NIC was only in 1 IOMMU group, but I guess I didn't press apply.
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