Here is my config... Maybe it can help:
balloon: 2048
bios: ovmf
boot: order=scsi0;ide2;net0;ide0
cores: 6
cpu: host,hidden=1,flags=+pcid
efidisk0: zfs-vm:vm-102-disk-1,efitype=4m,pre-enrolled-keys=1,size=1M
hostpci0: 0000:09:00,pcie=1,x-vga=1
ide0...