find all groups
for d in $(find /sys/kernel/iommu_groups/ -type l | sort -n -k5 -t/); do n=${d#*/iommu_groups/*}; n=${n%%/*}; printf 'IOMMU Group %s ' "$n"; lspci -nns "${d##*/}"; done;
virsh pci list
virsh # nodedev-list pci
specific pci info
lspci -vvs 02:00.0