41 lines
867 B
C
41 lines
867 B
C
|
/** @file
|
||
|
|
|
||
|
|
IoMmuDxe driver installs EDKII_IOMMU_PROTOCOL to provide the support for DMA
|
||
|
|
operations when SEV is enabled.
|
||
|
|
|
||
|
|
Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
|
||
|
|
|
||
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
||
|
|
|
||
|
|
**/
|
||
|
|
|
||
|
|
#include "AmdSevIoMmu.h"
|
||
|
|
|
||
|
|
EFI_STATUS
|
||
|
|
EFIAPI
|
||
|
|
IoMmuDxeEntryPoint (
|
||
|
|
IN EFI_HANDLE ImageHandle,
|
||
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
||
|
|
)
|
||
|
|
{
|
||
|
|
EFI_STATUS Status;
|
||
|
|
EFI_HANDLE Handle;
|
||
|
|
|
||
|
|
//
|
||
|
|
// When SEV is enabled, install IoMmu protocol otherwise install the
|
||
|
|
// placeholder protocol so that other dependent module can run.
|
||
|
|
//
|
||
|
|
if (MemEncryptSevIsEnabled ()) {
|
||
|
|
Status = AmdSevInstallIoMmuProtocol ();
|
||
|
|
} else {
|
||
|
|
Handle = NULL;
|
||
|
|
|
||
|
|
Status = gBS->InstallMultipleProtocolInterfaces (
|
||
|
|
&Handle,
|
||
|
|
&gIoMmuAbsentProtocolGuid,
|
||
|
|
NULL, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|