OvmfPkg/Library/PlatformSecureLib/PlatformSecureLib.c

   1 /** @file
   2   Provides a platform-specific method to enable Secure Boot Custom Mode setup.
   3
   4   Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
   5   This program and the accompanying materials
   6   are licensed and made available under the terms and conditions of the BSD License
   7   which accompanies this distribution.  The full text of the license may be found at
   8   http://opensource.org/licenses/bsd-license.php
   9
  10   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14 #include <Library/PcdLib.h>
  15
  16 /**
  17
  18   This function provides a platform-specific method to detect whether the platform
  19   is operating by a physically present user.
  20
  21   Programmatic changing of platform security policy (such as disable Secure Boot,
  22   or switch between Standard/Custom Secure Boot mode) MUST NOT be possible during
  23   Boot Services or after exiting EFI Boot Services. Only a physically present user
  24   is allowed to perform these operations.
  25
  26   NOTE THAT: This function cannot depend on any EFI Variable Service since they are
  27   not available when this function is called in AuthenticateVariable driver.
  28
  29   @retval  TRUE       The platform is operated by a physically present user.
  30   @retval  FALSE      The platform is NOT operated by a physically present user.
  31
  32 **/
  33 BOOLEAN
  34 EFIAPI
  35 UserPhysicalPresent (
  36   VOID
  37   )
  38 {
  39   return TRUE;
  40 }