1 files changed, 29 insertions, 0 deletions
diff --git a/OvmfPkg/Csm/Include/Guid/LegacyBios.h b/OvmfPkg/Csm/Include/Guid/LegacyBios.h
new file mode 100644
index 0000000000..e35fbff8d5
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+++ b/OvmfPkg/Csm/Include/Guid/LegacyBios.h
@@ -0,0 +1,29 @@
+/** @file
+  Defines a Tag GUID used to mark a UEFI legacy BIOS thunk driver based
+  on legacy BIOS services and legacy option ROM. This Tag GUID must be installed on
+  the ImageHandle of any module that follows the EFI Driver Model and uses
+  the Int86() or FarCall() services of the Legacy Bios Protocol to produce
+  a standard UEFI I/O Protocol.
+
+Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef _LEGACY_BIOS_H_
+#define _LEGACY_BIOS_H_
+
+///
+/// The Global ID for the Legacy BIOS GUID that must be installed onto the ImageHandle
+/// of any module follows the EFI Driver Model and uses the Int86() or FarCall()
+/// services of the Legacy BIOS Protocol to produce a standard UEFI I/O Protocol.
+///
+#define EFI_LEGACY_BIOS_GUID \
+  { \
+    0x2e3044ac, 0x879f, 0x490f, {0x97, 0x60, 0xbb, 0xdf, 0xaf, 0x69, 0x5f, 0x50 } \
+  }
+
+extern EFI_GUID gEfiLegacyBiosGuid;
+
+#endif