mjhjmtu

I am in the process of setting up VFIO with KVM. I have the VFIO itself working, in that the VFIO'd GPU displays the UEFI shell screen when I start the VM. I am also able to create a working Windows VM with VNC for graphics. My problem is that I create the VM with passthrough using qemu-system, and the one that fully boots I create using virt-install.

What I would like to do is use virt-install, but with the same PCI device as I passthrough with qemu-create, so I need to figure out how to translate the qemu-system argument to virt-install options (or virsh edit xml)

-device vfio-pci,host=42:00.0,multifunction=on 
-device vfio-pci,host=42:00.1 

into virt-install arguments. However, the instructions I using for virt-install do not use the PCI ID, but rather domain, bus and slot, which are not shown in lspci and I am not sure how to check.
So either I need to get that info and use it in a virt-install command, or find a way to use the PCI ID with virt-install.

Here are my two commands:

qemu system:

sudo qemu-system-x86_64 
-name $vmname,process=$vmname 
-machine type=q35,accel=kvm 
-cpu EPYC,kvm=off 
-smp 4,sockets=1,cores=2,threads=2 
-m 16G 
-balloon none 
-rtc clock=host,base=localtime 
-vga none 
-nographic 
-serial none 
-parallel none 
-device vfio-pci,host=42:00.0,multifunction=on 
-device vfio-pci,host=42:00.1 
-drive if=pflash,format=raw,readonly,file=/usr/share/OVMF/OVMF_CODE.fd 
-drive if=pflash,format=raw,file=/usr/share/OVMF/OVMF_VARS.fd 
-boot order=dc 
#-drive id=disk0,if=virtio,cache=none,format=raw,file=/dev/nvme-tank/ntfs-zvol-part1 
-drive file=/media/big-tank-8TB/OSISOS/Windows/WindowsOct2018.iso,index=1,media=cdrom 
-drive file=/media/big-tank-8TB/OSISOS/Windows/virtio-win-0.1.160.iso,index=2,media=cdrom 

virt-install

virt-install 
--name myWINVM1 
--ram 4096 
--disk path=/dev/nvme-tank/ntfs-zvol-part1 
--cpu core2duo 
--vcpus 4 
--os-type windows 
--os-variant win10 
--network bridge=virbr0 
--graphics vnc 
--console pty,target_type=serial 
--disk /media/big-tank-8TB/OSISOS/Windows/WindowsOct2018.iso,device=cdrom,bus=ide 
--disk /media/big-tank-8TB/OSISOS/Windows/virtio-win-0.1.160.iso,device=cdrom,bus=ide 

It would also be OK to figure out how to make the qemu-system boot properly, but I like virt-install better because it makes a handy XML file that I can look at later.