mirror of https://github.com/acidanthera/audk.git
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/** @file
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IoMmuDxe driver installs EDKII_IOMMU_PROTOCOL to provide the support for DMA
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operations when SEV is enabled.
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Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
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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,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "AmdSevIoMmu.h"
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EFI_STATUS
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EFIAPI
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IoMmuDxeEntryPoint (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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//
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// When SEV is enabled, install IoMmu protocol otherwise install the
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// placeholder protocol so that other dependent module can run.
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//
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if (MemEncryptSevIsEnabled ()) {
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Status = AmdSevInstallIoMmuProtocol ();
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} else {
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Handle = NULL;
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Status = gBS->InstallMultipleProtocolInterfaces (
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&Handle,
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&gIoMmuAbsentProtocolGuid,
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NULL, NULL);
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}
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return Status;
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}
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