1af4:1100 Used as PCI Subsystem ID for existing hardware devices emulated
by qemu.
-1af4:1110 ivshmem device (shared memory, docs/specs/ivshmem_device_spec.txt)
+1af4:1110 ivshmem device (shared memory, docs/specs/ivshmem-spec.txt)
All other device IDs are reserved.
1b36:0009 PCI Expander Bridge (-device pxb)
1b36:000a PCI-PCI bridge (multiseat)
1b36:000b PCIe Expander Bridge (-device pxb-pcie)
+1b36:000d PCI xhci usb host adapter
+1b36:000f mdpy (mdev sample device), linux/samples/vfio-mdev/mdpy.c
All these devices are documented in docs/specs.