1 files changed, 42 insertions, 0 deletions
diff --git a/roms/edk2/OvmfPkg/Include/Protocol/XenIo.h b/roms/edk2/OvmfPkg/Include/Protocol/XenIo.h
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index 000000000..f4051ca50
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+++ b/roms/edk2/OvmfPkg/Include/Protocol/XenIo.h
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+/** @file
+  XenIo protocol to abstract arch specific details
+
+  The Xen implementations for the Intel and ARM architectures differ in the way
+  the base address of the grant table is communicated to the guest. The former
+  uses a virtual PCI device, while the latter uses a device tree node.
+  In order to allow the XenBusDxe UEFI driver to be reused for the non-PCI
+  Xen implementation, this abstract protocol can be installed on a handle
+  with the appropriate base address.
+
+  Copyright (C) 2014, Linaro Ltd.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __PROTOCOL_XENIO_H__
+#define __PROTOCOL_XENIO_H__
+
+#include <IndustryStandard/Xen/xen.h>
+
+#define XENIO_PROTOCOL_GUID \
+  {0x6efac84f, 0x0ab0, 0x4747, {0x81, 0xbe, 0x85, 0x55, 0x62, 0x59, 0x04, 0x49}}
+
+///
+/// Forward declaration
+///
+typedef struct _XENIO_PROTOCOL XENIO_PROTOCOL;
+
+///
+/// Protocol structure
+///
+struct _XENIO_PROTOCOL {
+  //
+  // Protocol data fields
+  //
+  EFI_PHYSICAL_ADDRESS          GrantTableAddress;
+};
+
+extern EFI_GUID gXenIoProtocolGuid;
+
+#endif