6c22e534be
Add the shorter-term library instance outlined in the previous patch to OvmfPkg, so that we can imbue PciHostBridgeDxe with a protocol dependency on gEdkiiIoMmuProtocolGuid OR gIoMmuAbsentProtocolGuid. Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.0 Suggested-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
34 lines
1.0 KiB
C
34 lines
1.0 KiB
C
/** @file
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A hook-in library for MdeModulePkg/Bus/Pci/PciHostBridgeDxe.
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Plugging this library instance into PciHostBridgeDxe makes
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PciHostBridgeDxe depend on the platform's dynamic decision whether
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to provide IOMMU implementation (usually through IoMmuDxe driver).
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Copyright (C) 2017, Red Hat, Inc.
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Copyright (C) 2017, AMD, Inc.
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Base.h>
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RETURN_STATUS
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EFIAPI
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PlatformHasIoMmuInitialize (
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VOID
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)
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{
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//
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// Do nothing, just imbue PciHostBridgeDxe with a protocol dependency on
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// gIoMmuAbsentProtocolGuid OR gEdkiiIoMmuProtocolGuid.
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//
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return RETURN_SUCCESS;
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}
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