Force Virtio PCIe in Pfsense VM?

[wickeren]

I'm trying to get Pfsense to recognize the Virtio (network) adapter as PCIe instead of just PCI.
It should then also been seen as <VirtIO PCI (modern) Network adapter> instead of <VirtIO PCI (legacy) Network adapter> in the system log. It SHOULD be possible to to do this if machine type is set to Q35, as this platform supports PCIe. But somehow I can't get this to work, despite using all sorts of settings combinations. I have seen others have had this working on plain libvirt KVM, where the logs showed <VirtIO PCI (modern) Network adapter> , so looks like it's not an Pfsense issue.

PCIe(modern) should give better performance, that's what I'm looking for. Passtrough is not an option, as it's a cluster and HA/live migration is needed.

Any ideas?

 

[wickeren]

Did someone ever see something else but <VirtIO PCI (legacy) Network adapter> in a PFsense VM under Proxmox?

 

[leesteken]

Proxmox probably connects virtual network devices to the virtual PCI bus (instead of the virtual PCIe root, which is not always available). Maybe check the QEMU/KVM command that Proxmox actually runs (via qm showcmd) and manually (via the args: setting in the VM configuration file) add a VirtIO network device to the PCIe bus instead? I would not expect a difference in performance, as both are a virtual bus and the network device is software.