alex@duo > cat /proc/cmdline; for d in /sys/kernel/iommu_groups/*/devices/*; do \
n=${d#*/iommu_groups/*}; n=${n%%/*}; printf 'IOMMU group %s ' "$n"; lspci -nns "${d##*/}"; done
BOOT_IMAGE=/ROOT/23.10.2@/boot/vmlinuz-6.1.74-production+truenas root=ZFS=boot-pool/ROOT/23.10.2 ro libata.allow_tpm=1 amd_iommu=on iommu=pt kvm_amd.npt=1 kvm_amd.avic=1 intel_iommu=on zfsforce=1 nvme_core.multipath=N
IOMMU group 0 00:02.0 VGA compatible controller [0300]: Intel Corporation CoffeeLake-S GT2 [UHD Graphics 630] [8086:3e92]
IOMMU group 1 00:00.0 Host bridge [0600]: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers [8086:3ec2] (rev 07)
IOMMU group 10 02:00.0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network Connection [8086:1539] (rev 03)
IOMMU group 11 03:00.0 Non-Volatile memory controller [0108]: Sandisk Corp WD Blue SN550 NVMe SSD [15b7:5009] (rev 01)
IOMMU group 2 00:14.0 USB controller [0c03]: Intel Corporation 200 Series/Z370 Chipset Family USB 3.0 xHCI Controller [8086:a2af]
IOMMU group 2 00:14.2 Signal processing controller [1180]: Intel Corporation 200 Series PCH Thermal Subsystem [8086:a2b1]
IOMMU group 3 00:16.0 Communication controller [0780]: Intel Corporation 200 Series PCH CSME HECI #1 [8086:a2ba]
IOMMU group 4 00:17.0 SATA controller [0106]: Intel Corporation 200 Series PCH SATA controller [AHCI mode] [8086:a282]
IOMMU group 5 00:1c.0 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #1 [8086:a290] (rev f0)
IOMMU group 6 00:1c.5 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #6 [8086:a295] (rev f0)
IOMMU group 7 00:1d.0 PCI bridge [0604]: Intel Corporation 200 Series PCH PCI Express Root Port #9 [8086:a298] (rev f0)
IOMMU group 8 00:1f.0 ISA bridge [0601]: Intel Corporation Z370 Chipset LPC/eSPI Controller [8086:a2c9]
IOMMU group 8 00:1f.2 Memory controller [0580]: Intel Corporation 200 Series/Z370 Chipset Family Power Management Controller [8086:a2a1]
IOMMU group 8 00:1f.4 SMBus [0c05]: Intel Corporation 200 Series/Z370 Chipset Family SMBus Controller [8086:a2a3]
IOMMU group 9 00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (2) I219-V [8086:15b8]