1 files changed, 38 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/IoMmuDxe/AmdSevIoMmu.h b/roms/edk2/OvmfPkg/IoMmuDxe/AmdSevIoMmu.h
new file mode 100644
index 000000000..8244f28b5
--- /dev/null
+++ b/roms/edk2/OvmfPkg/IoMmuDxe/AmdSevIoMmu.h
@@ -0,0 +1,38 @@
+/** @file
+
+  The protocol provides support to allocate, free, map and umap a DMA buffer
+  for bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations
+  must be performed on unencrypted buffer hence protocol clear the encryption
+  bit from the DMA buffer.
+
+  Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
+  (C) Copyright 2017 Hewlett Packard Enterprise Development LP<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _AMD_SEV_IOMMU_H_
+#define _AMD_SEV_IOMMU_H_
+
+#include <Protocol/IoMmu.h>
+
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemEncryptSevLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+/**
+  Install IOMMU protocol to provide the DMA support for PciHostBridge and
+  MemEncryptSevLib.
+
+**/
+EFI_STATUS
+EFIAPI
+AmdSevInstallIoMmuProtocol (
+  VOID
+  );
+
+#endif