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We copy the code from InitRootBridge() [OvmfPkg/PciHostBridgeDxe/PciHostBridge.c], with a slight change: the device path is allocated separately now. This is the final field to initialize in PCI_ROOT_BRIDGE. The type EFI_PCI_ROOT_BRIDGE_DEVICE_PATH is renamed to OVMF_PCI_ROOT_BRIDGE_DEVICE_PATH. The original is a misnomer (it is not a standard UEFI type) that dates back to PcAtChipsetPkg/PciHostBridgeDxe. Simply removing the EFI_ suffix would result in PCI_ROOT_BRIDGE_DEVICE_PATH, where PCI_ could incorrectly suggest a relation with the PCI standards or the PCI-related generic edk2 code. Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Marcel Apfelbaum <marcel@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>