diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/OvmfPkg/IoMmuDxe/AmdSevIoMmu.h | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/OvmfPkg/IoMmuDxe/AmdSevIoMmu.h')
| -rw-r--r-- | roms/edk2/OvmfPkg/IoMmuDxe/AmdSevIoMmu.h | 38 |
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
|