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 <[email protected]> Cc: Laszlo Ersek <[email protected]> Contributed-under: TianoCore Contribution Agreement 1.0 Suggested-by: Laszlo Ersek <[email protected]> Signed-off-by: Brijesh Singh <[email protected]> Reviewed-by: Laszlo Ersek <[email protected]> --- OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.inf | 38 ++++++++++++++++++++ OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.c | 33 +++++++++++++++++ 2 files changed, 71 insertions(+) diff --git a/OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.inf b/OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.inf new file mode 100644 index 000000000000..f8151cfe2594 --- /dev/null +++ b/OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.inf @@ -0,0 +1,38 @@ +## @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. +# +# This program and the accompanying materials are licensed and made available +# under the terms and conditions of the BSD License which accompanies this +# distribution. The full text of the license may be found at +# http://opensource.org/licenses/bsd-license.php +# +# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT +# WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +## + +[Defines] + INF_VERSION = 1.25 + BASE_NAME = PlatformHasIoMmuLib + FILE_GUID = 49b4b018-0558-448b-1e1a-12226342877d + MODULE_TYPE = BASE + VERSION_STRING = 1.0 + LIBRARY_CLASS = PlatformHasIoMmuLib|DXE_DRIVER + CONSTRUCTOR = PlatformHasIoMmuInitialize + +[Sources] + PlatformHasIoMmuLib.c + +[Packages] + MdeModulePkg/MdeModulePkg.dec + MdePkg/MdePkg.dec + OvmfPkg/OvmfPkg.dec + +[Depex] + gEdkiiIoMmuProtocolGuid OR gIoMmuAbsentProtocolGuid diff --git a/OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.c b/OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.c new file mode 100644 index 000000000000..a271be3e8aa3 --- /dev/null +++ b/OvmfPkg/Library/PlatformHasIoMmuLib/PlatformHasIoMmuLib.c @@ -0,0 +1,33 @@ +/** @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. + + This program and the accompanying materials are licensed and made available + under the terms and conditions of the BSD License which accompanies this + distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT + WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +**/ + +#include <Base.h> + +RETURN_STATUS +EFIAPI +PlatformHasIoMmuInitialize ( + VOID + ) +{ + // + // Do nothing, just imbue PciHostBridgeDxe with a protocol dependency on + // gIoMmuAbsentProtocolGuid OR gEdkiiIoMmuProtocolGuid. + // + return RETURN_SUCCESS; +} -- 2.7.4 _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
