OvmfPkg/IoMmuDxe/AmdSevIoMmu.h

   1 /** @file
   2
   3   The protocol provides support to allocate, free, map and umap a DMA buffer
   4   for bus master (e.g PciHostBridge). When SEV is enabled, the DMA operations
   5   must be performed on unencrypted buffer hence protocol clear the encryption
   6   bit from the DMA buffer.
   7
   8   Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
   9   Copyright (c) 2017, AMD Inc. All rights reserved.<BR>
  10   (C) Copyright 2017 Hewlett Packard Enterprise Development LP<BR>
  11   SPDX-License-Identifier: BSD-2-Clause-Patent
  12
  13 **/
  14
  15 #ifndef _AMD_SEV_IOMMU_H_
  16 #define _AMD_SEV_IOMMU_H_
  17
  18 #include <Protocol/IoMmu.h>
  19
  20 #include <Library/BaseLib.h>
  21 #include <Library/BaseMemoryLib.h>
  22 #include <Library/DebugLib.h>
  23 #include <Library/MemEncryptSevLib.h>
  24 #include <Library/MemoryAllocationLib.h>
  25 #include <Library/UefiBootServicesTableLib.h>
  26
  27 /**
  28   Install IOMMU protocol to provide the DMA support for PciHostBridge and
  29   MemEncryptSevLib.
  30
  31 **/
  32 EFI_STATUS
  33 EFIAPI
  34 AmdSevInstallIoMmuProtocol (
  35   VOID
  36   );
  37
  38 #endif