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diff --git a/OvmfPkg/XenBusDxe/GrantTable.h b/OvmfPkg/XenBusDxe/GrantTable.h
new file mode 100644
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+++ b/OvmfPkg/XenBusDxe/GrantTable.h
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+/** @file
+  Grant Table function declaration.
+
+  Grant Table are used to grant access to certain page of the current
+  VM to an other VM.
+
+  Copyright (C) 2014, Citrix Ltd.
+
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+#ifndef __GNTTAB_H__
+#define __GNTTAB_H__
+
+#include <IndustryStandard/Xen/grant_table.h>
+
+/**
+  Initialize the Grant Table at the address MmioAddr.
+
+  @param Dev      A pointer to XENBUS_DEVICE.
+  @param MmioAddr An address where the grant table can be mapped into
+                  the guest.
+**/
+VOID
+XenGrantTableInit (
+  IN XENBUS_DEVICE  *Dev,
+  IN UINT64         MmioAddr
+  );
+
+/**
+  Desinitilize the Grant Table.
+**/
+VOID
+XenGrantTableDeinit (
+  IN XENBUS_DEVICE  *Dev
+  );
+
+/**
+  Grant access to the page Frame to the domain DomainId.
+
+  @param This       A pointer to XENBUS_PROTOCOL instance.
+  @param DomainId   ID of the domain to grant acces to.
+  @param Frame      Frame Number of the page to grant access to.
+  @param ReadOnly   Provide read-only or read-write access.
+  @param RefPtr     Reference number of the grant will be writen to this pointer.
+**/
+EFI_STATUS
+EFIAPI
+XenBusGrantAccess (
+  IN  XENBUS_PROTOCOL *This,
+  IN  domid_t         DomainId,
+  IN  UINTN           Frame, // MFN
+  IN  BOOLEAN         ReadOnly,
+  OUT grant_ref_t     *RefPtr
+  );
+
+/**
+  End access to grant Ref, previously return by XenBusGrantAccess.
+
+  @param This       A pointer to XENBUS_PROTOCOL instance.
+  @param Ref        Reference numeber of a grant previously returned by
+                    XenBusGrantAccess.
+**/
+EFI_STATUS
+EFIAPI
+XenBusGrantEndAccess (
+  IN XENBUS_PROTOCOL  *This,
+  IN grant_ref_t      Ref
+  );
+
+#endif /* !__GNTTAB_H__ */