Missing PCI Device 2022

[B-C]

Have seen a few of these but wanted to double check here as this one I haven't seen a way to resolve.


Have a 2022 Template with UEFI boot and Virtual TPM

Boot the VM all works a little slower than expected even with full drivers and guest tools installed.
Search the disk for missing drivers nothing found.
Once booted - Update Windows Updates and Update to the current Guest Tools Iso currently 0.1.266


PCI\VEN_1AF4
PCI\CC_00FF00

https://devicehunt.com/view/type/pci/vendor/1AF4
Seems to be a simple driver 1057 shows nothing associated though.

There does seem to be some network lag that is unexpected on a 10gb and the VMs hesistate a bit and will lockup the desktop here and there under load.

Would expect it has something to do with TPM Virtualization?
Server itself doesn't have a TPM chip so that is out either way the driver should be available I'd expect for a virtual one.
There is no passthrough of anything.

So I'm missing something....

A: - Found I had the machine type set to linux - modified this



Changed the SCSI Back to Single after this:



Still missing that darn PCI Device..

 

[B-C]

So going through it..

Changing machine to pc-q35-9.0 viommu=intel vs virtio seems to have resolved the missing PCI device.
When I was checking settings after changing from linux to Windows in above it was set down to pc-35-5.1,viommu=virtuio
really the 5.1 was the odd part.

Initially also noticed the missing PCI device got removed when I disabled viommu (default)
--- so something in there causing the device to be added --
Cool still not 100% on the viommu settings and learning a lot as I play with it.

 

[djpc47]

noticed this on windows 10 too.... I was trying to get vt passed through to the vm to use WSL if that helps any ** I thought it might have something to do with hardware-assisted extensions/guest tools but trying to install the guest agent doesn't fix it(not sure of what else might be worth trying)