MdePkg: Add EFI_RT_PROPERTIES_TABLE

Define Guid & data structure for EFI_RT_PROPERTIES_TABLE, designed
to be published by a platform if it no longer supports all EFI
runtime services once ExitBootServices() has been called by the OS.
(UEFI 2.8 errata a, mantis 2049)

Signed-off-by: Oleksiy Yakovlev <oleksiyy@ami.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

MdePkg/Include/Guid/RtPropertiesTable.h

@@ -0,0 +1,69 @@
+/** @file
+Guid & data structure for EFI_RT _PROPERTIES_TABLE, designed to be published by a
+platform if it no longer  supports all EFI runtime services once ExitBootServices()
+has been called by the OS. Introduced in UEFI 2.8a.
+
+
+Copyright (c) 2020, American Megatrends International LLC. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef __RT_PROPERTIES_TABLE_GUID_H__
+#define __RT_PROPERTIES_TABLE_GUID_H__
+
+//
+// Table, defined here, should be published by a platform if it no longer supports all EFI runtime
+// services once ExitBootServices() has been called by the OS. Note that this is merely a hint
+// to the OS, which it is free to ignore, and so the platform is still required to provide callable
+// implementations of unsupported runtime services that simply return EFI_UNSUPPORTED.
+//
+#define EFI_RT_PROPERTIES_TABLE_GUID \
+    { 0xeb66918a, 0x7eef, 0x402a, \
+    { 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9 }}
+
+
+
+
+#pragma pack(1)
+
+typedef struct {
+  ///
+  /// Version of the structure, must be 0x1.
+  ///
+  UINT16 Version;
+
+  ///
+  /// Size in bytes of the entire EFI_RT_PROPERTIES_TABLE, must be 8.
+  ///
+  UINT16 Length;
+
+  ///
+  /// Bitmask of which calls are or are not supported, where a bit set to 1 indicates
+  /// that the call is supported, and 0 indicates that it is not.
+  ///
+  UINT32 RuntimeServicesSupported;
+} EFI_RT_PROPERTIES_TABLE;
+
+#pragma pack()
+
+#define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
+
+#define EFI_RT_SUPPORTED_GET_TIME                       0x0001
+#define EFI_RT_SUPPORTED_SET_TIME                       0x0002
+#define EFI_RT_SUPPORTED_GET_WAKEUP_TIME                0x0004
+#define EFI_RT_SUPPORTED_SET_WAKEUP_TIME                0x0008
+#define EFI_RT_SUPPORTED_GET_VARIABLE                   0x0010
+#define EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME         0x0020
+#define EFI_RT_SUPPORTED_SET_VARIABLE                   0x0040
+#define EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP        0x0080
+#define EFI_RT_SUPPORTED_CONVERT_POINTER                0x0100
+#define EFI_RT_SUPPORTED_GET_NEXT_HIGH_MONOTONIC_COUNT  0x0200
+#define EFI_RT_SUPPORTED_RESET_SYSTEM                   0x0400
+#define EFI_RT_SUPPORTED_UPDATE_CAPSULE                 0x0800
+#define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES     0x1000
+#define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO            0x2000
+
+extern EFI_GUID gEfiRtPropertiesTableGuid;
+
+#endif

MdePkg/MdePkg.dec

@@ -665,6 +665,11 @@
   ## Include/Guid/HiiPlatformSetupFormset.h
   gEfiHiiResetStyleFormsetGuid     = { 0x790217bd, 0xbecf, 0x485b, { 0x91, 0x70, 0x5f, 0xf7, 0x11, 0x31, 0x8b, 0x27 }}
 
+  # GUIDs defined in UEFI2.8a
+  #
+  ## Include/Guid/RtPropertiesTable.h
+  gEfiRtPropertiesTableGuid      = { 0xeb66918a, 0x7eef, 0x402a, { 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9 }}
+
   #
   # GUID defined in PI1.0
   #