UefiCpuPkg/Library/MpInitLib/Ia32/AmdSev.c

/** @file

  AMD SEV helper function.

  Copyright (c) 2021, AMD Incorporated. All rights reserved.<BR>

  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include "MpLib.h"

/**
  Create an SEV-SNP AP save area (VMSA) for use in running the vCPU.

  @param[in]  CpuMpData        Pointer to CPU MP Data
  @param[in]  CpuData          Pointer to CPU AP Data
  @param[in]  ApicId           APIC ID of the vCPU
**/
VOID
SevSnpCreateSaveArea (
  IN CPU_MP_DATA  *CpuMpData,
  IN CPU_AP_DATA  *CpuData,
  UINT32          ApicId
  )
{
  //
  // SEV-SNP is not support on 32-bit build.
  //
  ASSERT (FALSE);
}

/**
  Create SEV-SNP APs.

  @param[in]  CpuMpData        Pointer to CPU MP Data
  @param[in]  ProcessorNumber  The handle number of specified processor
                               (-1 for all APs)
**/
VOID
SevSnpCreateAP (
  IN CPU_MP_DATA  *CpuMpData,
  IN INTN         ProcessorNumber
  )
{
  //
  // SEV-SNP is not support on 32-bit build.
  //
  ASSERT (FALSE);
}

/**
  Issue RMPADJUST to adjust the VMSA attribute of an SEV-SNP page.

  @param[in]  PageAddress
  @param[in]  VmsaPage

  @return  RMPADJUST return value
**/
UINT32
SevSnpRmpAdjust (
  IN  EFI_PHYSICAL_ADDRESS  PageAddress,
  IN  BOOLEAN               VmsaPage
  )
{
  //
  // RMPADJUST is not supported in 32-bit mode
  //
  return RETURN_UNSUPPORTED;
}