Description of PCI configuration options

Configuration option = Default value	Description
[DEFAULT]
pci_alias = []	(MultiStrOpt) An alias for a PCI passthrough device requirement. This allows users to specify the alias in the extra_spec for a flavor, without needing to repeat all the PCI property requirements. For example: pci_alias = { "name": "QuicAssist", "product_id": "0443", "vendor_id": "8086", "device_type": "ACCEL" } defines an alias for the Intel QuickAssist card. (multi valued)
pci_passthrough_whitelist = []	(MultiStrOpt) White list of PCI devices available to VMs. For example: pci_passthrough_whitelist = [{"vendor_id": "8086", "product_id": "0443"}]