/** @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; | |
} |