Hi,
The current PCI passthrough support up to Bus:Device.Function only.
For example: 'VBoxManage modifyvm "VM name" --pciattach bus:device.function'
I would like to request to add PCI segmentation support on I/O MMU Virtualization, such as: 'VBoxManage modifyvm "VM name" --pciattach segmentdevice.function'.
Where the "segment" can be any value from 0x0000 to 0xFFFF.
Corresponding ticket is at: virtualbox[dot]org/ticket/15264