-[0000:00]-+-00.0  Intel Corporation 440FX - 82441FX PMC [Natoma]
           +-01.0  Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
           +-01.1  Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
           +-01.2  Intel Corporation 82371SB PIIX3 USB [Natoma/Triton II]
           +-01.3  Intel Corporation 82371AB/EB/MB PIIX4 ACPI
           +-02.0  Device 1234:1111
           +-03.0  Red Hat, Inc. Virtio memory balloon
           +-04.0  Intel Corporation 6300ESB Watchdog Timer
           +-05.0-[01]----01.0  Red Hat, Inc. Virtio SCSI
           +-08.0  Red Hat, Inc. Virtio console
           +-12.0  Red Hat, Inc. Virtio network device
           +-1e.0-[02]--
           \-1f.0-[03]--