| /** @file | |
| A hook-in library for MdeModulePkg/Bus/Pci/PciHostBridgeDxe. | |
| Plugging this library instance into PciHostBridgeDxe makes | |
| PciHostBridgeDxe depend on the platform's dynamic decision whether | |
| to provide IOMMU implementation (usually through IoMmuDxe driver). | |
| Copyright (C) 2017, Red Hat, Inc. | |
| Copyright (C) 2017, AMD, Inc. | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #include <Base.h> | |
| RETURN_STATUS | |
| EFIAPI | |
| PlatformHasIoMmuInitialize ( | |
| VOID | |
| ) | |
| { | |
| // | |
| // Do nothing, just imbue PciHostBridgeDxe with a protocol dependency on | |
| // gIoMmuAbsentProtocolGuid OR gEdkiiIoMmuProtocolGuid. | |
| // | |
| return RETURN_SUCCESS; | |
| } |