https://bugs.launchpad.net/qemu/+bug/1894869
Here's the discussion with the upstream devs. The problem ended up being on Chelsio's part as either the .7 funciton fo these cards should not have even been exposed to the OS in the first place, or SR-IOV is necessary to actually correct the parameters of this function. Unfortunately, it looks like SR-IOV is no longer possible to enable on these cards. Thank you for your help. -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1894869 Title: Chelsio T4 has old MSIX PBA offset bug Status in QEMU: Invalid Status in Debian: In Progress Bug description: There exists a bug with Chelsio NICs T4 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 I discovered this bug on a Proxmox system, and I was working with a downstream Proxmox developer to try to fix this issue. They provided me with the following change to make from line 1484 of hw/vfio/pci.c: static void vfio_msix_early_setup(VFIOPCIDevice *vdev, Error **errp) * is 0x1000, so we hard code that here. */ if (vdev->vendor_id == PCI_VENDOR_ID_CHELSIO && - (vdev->device_id & 0xff00) == 0x5800) { + ((vdev->device_id & 0xff00) == 0x5800 || + (vdev->device_id & 0xff00) == 0x1425)) { msix->pba_offset = 0x1000; } else if (vdev->msix_relo == OFF_AUTOPCIBAR_OFF) { error_setg(errp, "hardware reports invalid configuration, " However, I found that this did not fix the issue, so the bug appears to work differently than the one that was present on the T5 NICs which has already been patched. I have attached the output of my lspci -nnkvv To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1894869/+subscriptions