Comment 4 for bug 1894869

There exists a bug with Chelsio NICs that causes the following error:

kvm: -device vfio-pci,host=0000:83:00.7,id=hostpci1.7,bus=pci.0,addr=0x11.7: vfio 0000:83:00.7: hardware reports invalid configuration, MSIX PBA outside of specified BAR

This bug was fixed in later versions of Qemu, and is caused by vendor misconfigurations of their MSIX PBA. I know a catchall fix was implemented in recent versions of Qemu, as well as patches applied to hotfix it in earlier versions. I encountered this bug using a Chelsio T4 device, and I believe the patches are for T5 and newer.

Here is an email chain that has a patch for this situation:
https://patchwork.ozlabs.org/project<email address hidden>/

I'd appreciate it if anyone could tell me what the best course of action to fix it on my system would be. I assume the solution is to either build Qemu with this patch applied, or update the version of Qemu in my Proxmox installation, but I do not know which is the better route to go.