UefiCpuPkg: Move AsmRelocateApLoopStart from Mpfuncs.nasm to AmdSev.nasm

[mirror_edk2.git] / MdePkg / Library / BaseLib / IntelTdxNull.c

/** @file\r
\r
  Null stub of TdxLib\r
\r
  Copyright (c) 2021, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <Library/BaseLib.h>\r
#include <Uefi/UefiBaseType.h>\r
\r
/**\r
  The TDCALL instruction causes a VM exit to the Intel TDX module.  It is\r
  used to call guest-side Intel TDX functions, either local or a TD exit\r
  to the host VMM, as selected by Leaf.\r
  Leaf functions are described at <https://software.intel.com/content/\r
  www/us/en/develop/articles/intel-trust-domain-extensions.html>\r
\r
  @param[in]      Leaf        Leaf number of TDCALL instruction\r
  @param[in]      Arg1        Arg1\r
  @param[in]      Arg2        Arg2\r
  @param[in]      Arg3        Arg3\r
  @param[in,out]  Results  Returned result of the Leaf function\r
\r
  @return EFI_SUCCESS\r
  @return Other           See individual leaf functions\r
**/\r
UINTN\r
EFIAPI\r
TdCall (\r
  IN UINT64    Leaf,\r
  IN UINT64    Arg1,\r
  IN UINT64    Arg2,\r
  IN UINT64    Arg3,\r
  IN OUT VOID  *Results\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  TDVMALL is a leaf function 0 for TDCALL. It helps invoke services from the\r
  host VMM to pass/receive information.\r
\r
  @param[in]     Leaf        Number of sub-functions\r
  @param[in]     Arg1        Arg1\r
  @param[in]     Arg2        Arg2\r
  @param[in]     Arg3        Arg3\r
  @param[in]     Arg4        Arg4\r
  @param[in,out] Results     Returned result of the sub-function\r
\r
  @return EFI_SUCCESS\r
  @return Other           See individual sub-functions\r
\r
**/\r
UINTN\r
EFIAPI\r
TdVmCall (\r
  IN UINT64    Leaf,\r
  IN UINT64    Arg1,\r
  IN UINT64    Arg2,\r
  IN UINT64    Arg3,\r
  IN UINT64    Arg4,\r
  IN OUT VOID  *Results\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  Probe if TD is enabled.\r
\r
  @return TRUE    TD is enabled.\r
  @return FALSE   TD is not enabled.\r
**/\r
BOOLEAN\r
EFIAPI\r
TdIsEnabled (\r
  )\r
{\r
  return FALSE;\r
}\r