-[0000:00]-+-00.0  Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller
           +-01.0  Device 1234:1111
           +-02.0  Red Hat, Inc. Virtio SCSI
           +-03.0  Red Hat, Inc. Virtio SCSI
           +-04.0  Red Hat, Inc. Virtio SCSI
           +-05.0  Red Hat, Inc. Virtio network device
           +-1f.0  Intel Corporation 82801IB (ICH9) LPC Interface Controller
           +-1f.2  Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller [AHCI mode]
           \-1f.3  Intel Corporation 82801I (ICH9 Family) SMBus Controller