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

[mirror_edk2.git] / SecurityPkg / Library / Tpm2CommandLib / Tpm2Context.c

/** @file\r
  Implement TPM2 Context related command.\r
\r
Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved. <BR>\r
SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
#include <IndustryStandard/UefiTcgPlatform.h>\r
#include <Library/Tpm2CommandLib.h>\r
#include <Library/Tpm2DeviceLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
\r
#pragma pack(1)\r
\r
typedef struct {\r
  TPM2_COMMAND_HEADER    Header;\r
  TPMI_DH_CONTEXT        FlushHandle;\r
} TPM2_FLUSH_CONTEXT_COMMAND;\r
\r
typedef struct {\r
  TPM2_RESPONSE_HEADER    Header;\r
} TPM2_FLUSH_CONTEXT_RESPONSE;\r
\r
#pragma pack()\r
\r
/**\r
  This command causes all context associated with a loaded object or session to be removed from TPM memory.\r
\r
  @param[in]  FlushHandle        The handle of the item to flush.\r
\r
  @retval EFI_SUCCESS            Operation completed successfully.\r
  @retval EFI_DEVICE_ERROR       The command was unsuccessful.\r
**/\r
EFI_STATUS\r
EFIAPI\r
Tpm2FlushContext (\r
  IN      TPMI_DH_CONTEXT  FlushHandle\r
  )\r
{\r
  EFI_STATUS                   Status;\r
  TPM2_FLUSH_CONTEXT_COMMAND   SendBuffer;\r
  TPM2_FLUSH_CONTEXT_RESPONSE  RecvBuffer;\r
  UINT32                       SendBufferSize;\r
  UINT32                       RecvBufferSize;\r
\r
  //\r
  // Construct command\r
  //\r
  SendBuffer.Header.tag         = SwapBytes16 (TPM_ST_NO_SESSIONS);\r
  SendBuffer.Header.commandCode = SwapBytes32 (TPM_CC_FlushContext);\r
\r
  SendBuffer.FlushHandle = SwapBytes32 (FlushHandle);\r
\r
  SendBufferSize              = (UINT32)sizeof (SendBuffer);\r
  SendBuffer.Header.paramSize = SwapBytes32 (SendBufferSize);\r
\r
  //\r
  // send Tpm command\r
  //\r
  RecvBufferSize = sizeof (RecvBuffer);\r
  Status         = Tpm2SubmitCommand (SendBufferSize, (UINT8 *)&SendBuffer, &RecvBufferSize, (UINT8 *)&RecvBuffer);\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  if (RecvBufferSize < sizeof (TPM2_RESPONSE_HEADER)) {\r
    DEBUG ((DEBUG_ERROR, "Tpm2FlushContext - RecvBufferSize Error - %x\n", RecvBufferSize));\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  if (SwapBytes32 (RecvBuffer.Header.responseCode) != TPM_RC_SUCCESS) {\r
    DEBUG ((DEBUG_ERROR, "Tpm2FlushContext - responseCode - %x\n", SwapBytes32 (RecvBuffer.Header.responseCode)));\r
    return EFI_DEVICE_ERROR;\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r