MdePkg/Include/IndustryStandard/MemoryOverwriteRequestControlLock.h

   1 /** @file
   2   Support for Microsoft Secure MOR implementation, defined at
   3   Microsoft Secure MOR implementation.
   4   https://msdn.microsoft.com/en-us/library/windows/hardware/mt270973(v=vs.85).aspx
   5
   6   Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8
   9 **/
  10
  11 #ifndef __MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_H__
  12 #define __MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_H__
  13
  14 #define MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_GUID \
  15   { \
  16     0xBB983CCF, 0x151D, 0x40E1, {0xA0, 0x7B, 0x4A, 0x17, 0xBE, 0x16, 0x82, 0x92} \
  17   }
  18
  19 #define MEMORY_OVERWRITE_REQUEST_CONTROL_LOCK_NAME L"MemoryOverwriteRequestControlLock"
  20
  21 //
  22 // VendorGuid: {BB983CCF-151D-40E1-A07B-4A17BE168292}
  23 // Name:       MemoryOverwriteRequestControlLock
  24 // Attributes: NV+BS+RT
  25 // GetVariable value in Data parameter: 0x0 (unlocked); 0x1 (locked without key); 0x2 (locked with key)
  26 // SetVariable value in Data parameter: 0x0 (unlocked); 0x1 (locked);
  27 //                                      Revision 2 additionally accepts an 8-byte value that represents a shared secret key.
  28 //
  29
  30 //
  31 // Note: Setting MemoryOverwriteRequestControlLock does not commit to flash (just changes the internal lock state).
  32 // Getting the variable returns the internal state and never exposes the key.
  33 //
  34
  35 extern EFI_GUID gEfiMemoryOverwriteRequestControlLockGuid;
  36
  37 #endif