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alder_lake_bios/Intel/AlderLake/AlderLakePlatSamplePkg/Features/Tcg/TcgSetupDxe/TcgSetupDxe.c

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/**@file
@copyright
INTEL CONFIDENTIAL
Copyright 2011 - 2020 Intel Corporation.
The source code contained or described herein and all documents related to the
source code ("Material") are owned by Intel Corporation or its suppliers or
licensors. Title to the Material remains with Intel Corporation or its suppliers
and licensors. The Material may contain trade secrets and proprietary and
confidential information of Intel Corporation and its suppliers and licensors,
and is protected by worldwide copyright and trade secret laws and treaty
provisions. No part of the Material may be used, copied, reproduced, modified,
published, uploaded, posted, transmitted, distributed, or disclosed in any way
without Intel's prior express written permission.
No license under any patent, copyright, trade secret or other intellectual
property right is granted to or conferred upon you by disclosure or delivery
of the Materials, either expressly, by implication, inducement, estoppel or
otherwise. Any license under such intellectual property rights must be
express and approved by Intel in writing.
Unless otherwise agreed by Intel in writing, you may not remove or alter
this notice or any other notice embedded in Materials by Intel or
Intel's suppliers or licensors in any way.
This file contains a 'Sample Driver' and is licensed as such under the terms
of your license agreement with Intel or your vendor. This file may be modified
by the user, subject to the additional terms of the license agreement.
@par Specification Reference:
**/
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Protocol/TcgService.h>
#include <SetupVariable.h>
#include <TcgSetup.h>
#include <Library/PcdLib.h>
#include <Tcg2ConfigNvData.h>
#include <Library/BaseMemoryLib.h>
#include <Library/IoLib.h>
#include <Register/PttPtpRegs.h>
#define H2NS(x) ((((x) << 8) | ((x) >> 8)) & 0xffff)
#define H2NL(x) (H2NS ((x) >> 16) | (H2NS ((x) & 0xffff) << 16))
//
// Nv Data structure referenced by IFR
//
typedef struct {
UINT8 TpmOperation;
BOOLEAN TpmEnable;
BOOLEAN TpmActivate;
} TCG_CONFIGURATION;
EFI_STATUS
GetTpmState (
OUT BOOLEAN *TpmEnable, OPTIONAL
OUT BOOLEAN *TpmActivated, OPTIONAL
OUT BOOLEAN *PhysicalPresenceLock, OPTIONAL
OUT BOOLEAN *LifetimeLock, OPTIONAL
OUT BOOLEAN *CmdEnable OPTIONAL
)
{
EFI_STATUS Status;
TPM_RSP_COMMAND_HDR *TpmRsp;
UINT32 TpmSendSize;
TPM_PERMANENT_FLAGS *TpmPermanentFlags;
TPM_STCLEAR_FLAGS *VFlags;
UINT8 CmdBuf[64];
EFI_TCG_PROTOCOL *TcgProtocol;
Status = gBS->LocateProtocol (&gEfiTcgProtocolGuid, NULL, (VOID **) &TcgProtocol);
if (EFI_ERROR (Status)) {
return Status;
}
//
// Get TPM Permanent flags (TpmEnable, TpmActivated, LifetimeLock, CmdEnable)
//
if ((TpmEnable != NULL) || (TpmActivated != NULL) || (LifetimeLock != NULL) || (CmdEnable != NULL)) {
TpmSendSize = sizeof (TPM_RQU_COMMAND_HDR) + sizeof (UINT32) * 3;
*(UINT16*)&CmdBuf[0] = H2NS (TPM_TAG_RQU_COMMAND);
*(UINT32*)&CmdBuf[2] = H2NL (TpmSendSize);
*(UINT32*)&CmdBuf[6] = H2NL (TPM_ORD_GetCapability);
*(UINT32*)&CmdBuf[10] = H2NL (TPM_CAP_FLAG);
*(UINT32*)&CmdBuf[14] = H2NL (sizeof (TPM_CAPABILITY_AREA));
*(UINT32*)&CmdBuf[18] = H2NL (TPM_CAP_FLAG_PERMANENT);
Status = TcgProtocol->PassThroughToTpm (
TcgProtocol,
TpmSendSize,
CmdBuf,
sizeof (CmdBuf),
CmdBuf
);
TpmRsp = (TPM_RSP_COMMAND_HDR*)&CmdBuf[0];
if (EFI_ERROR (Status) ||
(TpmRsp->tag != H2NS (TPM_TAG_RSP_COMMAND)) ||
(TpmRsp->returnCode != 0)) {
return EFI_DEVICE_ERROR;
}
TpmPermanentFlags = (TPM_PERMANENT_FLAGS *)&CmdBuf[sizeof (TPM_RSP_COMMAND_HDR) + sizeof (UINT32)];
if (TpmEnable != NULL) {
*TpmEnable = !TpmPermanentFlags->disable;
}
if (TpmActivated != NULL) {
*TpmActivated = !TpmPermanentFlags->deactivated;
}
if (LifetimeLock != NULL) {
*LifetimeLock = TpmPermanentFlags->physicalPresenceLifetimeLock;
}
if (CmdEnable != NULL) {
*CmdEnable = TpmPermanentFlags->physicalPresenceCMDEnable;
}
}
//
// Get TPM Volatile flags (PhysicalPresenceLock)
//
if (PhysicalPresenceLock != NULL) {
TpmSendSize = sizeof (TPM_RQU_COMMAND_HDR) + sizeof (UINT32) * 3;
*(UINT16*)&CmdBuf[0] = H2NS (TPM_TAG_RQU_COMMAND);
*(UINT32*)&CmdBuf[2] = H2NL (TpmSendSize);
*(UINT32*)&CmdBuf[6] = H2NL (TPM_ORD_GetCapability);
*(UINT32*)&CmdBuf[10] = H2NL (TPM_CAP_FLAG);
*(UINT32*)&CmdBuf[14] = H2NL (sizeof (TPM_CAPABILITY_AREA));
*(UINT32*)&CmdBuf[18] = H2NL (TPM_CAP_FLAG_VOLATILE);
Status = TcgProtocol->PassThroughToTpm (
TcgProtocol,
TpmSendSize,
CmdBuf,
sizeof (CmdBuf),
CmdBuf
);
TpmRsp = (TPM_RSP_COMMAND_HDR*)&CmdBuf[0];
if (EFI_ERROR (Status) ||
(TpmRsp->tag != H2NS (TPM_TAG_RSP_COMMAND)) ||
(TpmRsp->returnCode != 0)) {
return EFI_DEVICE_ERROR;
}
VFlags = (TPM_STCLEAR_FLAGS *)&CmdBuf[sizeof (TPM_RSP_COMMAND_HDR) + sizeof (UINT32)];
if (PhysicalPresenceLock != NULL) {
*PhysicalPresenceLock = VFlags->physicalPresenceLock;
}
}
return EFI_SUCCESS;
}
/**
This function gets registered as a callback to set the TCG setup variables
@param[in] Event - A pointer to the Event that triggered the callback.
@param[in] Context - A pointer to private data registered with the callback function.
**/
VOID
EFIAPI
InitializeTcgSetupCallback (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
EFI_GUID *TpmInstanceGuid;
TCG_SETUP TcgSetup;
TCG_CONFIGURATION TcgConfiguration;
TCG2_CONFIGURATION Tcg2Configuration;
UINT32 TcgSetupAttr;
UINT32 TcgConfigurationAttr;
UINT32 Tcg2ConfigurationAttr;
UINTN DataSize;
UINT32 TpmStsFtif;
BOOLEAN TpmEnable;
BOOLEAN TpmState;
//
// Load current variable values
//
DataSize = sizeof (TCG_SETUP);
Status = gRT->GetVariable(
TCG_SETUP_NAME,
&gSetupVariableGuid,
&TcgSetupAttr,
&DataSize,
&TcgSetup
);
//
// If TcgSetup Variable doesn't exist, initialize values
//
if (EFI_ERROR (Status)) {
TcgSetup.HideTpm = 0;
TcgSetup.MorState = 0;
TcgSetup.TpmOperation = 0;
TcgSetupAttr = (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS);
}
//
// These should always be initialized and updated with values detected at runtime
//
TcgSetup.dTpm12Present = 0;
TcgSetup.TpmCurrentState = 0;
TcgSetup.dTpm20Present = 0;
TcgSetup.PttPresent = 0;
DataSize = sizeof (TcgConfiguration);
Status = gRT->GetVariable (
L"TCG_CONFIGURATION",
&gTcgConfigFormSetGuid,
&TcgConfigurationAttr,
&DataSize,
&TcgConfiguration
);
//
// If TcgConfiguration Variable doesn't exist, initialize values
//
if (EFI_ERROR (Status)) {
TcgConfiguration.TpmOperation = 0; // PHYSICAL_PRESENCE_NO_ACTION
TcgConfiguration.TpmEnable = 0;
TcgConfiguration.TpmActivate = 0;
TcgConfigurationAttr = (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS);
}
DataSize = sizeof (Tcg2Configuration);
Status = gRT->GetVariable (
TCG2_STORAGE_NAME,
&gTcg2ConfigFormSetGuid,
&Tcg2ConfigurationAttr,
&DataSize,
&Tcg2Configuration
);
//
// If Tcg2Configuration Variable doesn't exist, initialize values
//
if (EFI_ERROR (Status)) {
Tcg2Configuration.TpmDevice = TPM_DEVICE_NULL;
Tcg2ConfigurationAttr = (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS);
}
//
// Update variables
//
while (TRUE) {
//
// Update Tcg2Configuration with detected TpmInstanceGuid.
//
TpmInstanceGuid = PcdGetPtr (PcdTpmInstanceGuid);
if (CompareGuid (TpmInstanceGuid, &gEfiTpmDeviceInstanceNoneGuid)) { // No TPM case
Tcg2Configuration.TpmDevice = TPM_DEVICE_NULL;
DEBUG ((DEBUG_INFO, "No TPM present\n"));
} else if (CompareGuid (TpmInstanceGuid, &gEfiTpmDeviceInstanceTpm12Guid)) { // TPM 1.2 case
Tcg2Configuration.TpmDevice = TPM_DEVICE_1_2;
if (TcgSetup.HideTpm) { // If HideTpm, keep TpmCurrentState at 0 and do not report dTPM as present
break;
}
TcgSetup.dTpm12Present = 1;
DEBUG ((DEBUG_INFO, "dTPM 1.2 present\n"));
} else if (CompareGuid (TpmInstanceGuid, &gEfiTpmDeviceInstanceTpm20DtpmGuid)) {
TpmStsFtif = MmioRead32 (R_PTT_TXT_STS_FTIF);
if ((TpmStsFtif & V_FTIF_FTPM_PRESENT) == ((UINT32) V_FTIF_FTPM_PRESENT)) { // PTT case
DEBUG ((DEBUG_INFO, "PTT present\n"));
TcgSetup.PttPresent = 1;
} else { // dTPM 2.0 case
DEBUG ((DEBUG_INFO, "dTPM 2.0 present\n"));
TcgSetup.dTpm20Present = 1;
}
Tcg2Configuration.TpmDevice = TPM_DEVICE_2_0_DTPM;
}
//
// Update TpmCurrentState
//
Status = GetTpmState (&TpmEnable, &TpmState, NULL, NULL, NULL);
if (TpmEnable && TpmState) {
TcgSetup.TpmCurrentState = 2;
}
if (TpmEnable && !TpmState) {
TcgSetup.TpmCurrentState = 1;
}
//
// Update TpmOperation
//
if (TcgConfiguration.TpmOperation == 1 && // PHYSICAL_PRESENCE_ENABLE, default value in VFR
TpmEnable == FALSE) {
DEBUG ((DEBUG_INFO, "Sync up TpmOperation value of TPM between EfiVariable and real status," "this should be necessary and only happend at first boot.\n"));
if (TpmState) { // Active
TcgConfiguration.TpmOperation = 2; // PHYSICAL_PRESENCE_DISABLE
} else { // Deactive
TcgConfiguration.TpmOperation = 7; // PHYSICAL_PRESENCE_DEACTIVATE_DISABLE;
}
}
DEBUG((DEBUG_INFO, "[TcgConfiguration]: TpmOperation:%d\n", (UINTN)TcgConfiguration.TpmOperation));
break;
}
DEBUG ((
DEBUG_INFO,
"[TcgSetup]: HideTpm:%d, dTpm12Present:%d, TpmCurrentState:%d\n",
(UINTN) TcgSetup.HideTpm,
(UINTN) TcgSetup.dTpm12Present,
(UINTN) TcgSetup.TpmCurrentState));
Status = gRT->SetVariable (
TCG_SETUP_NAME,
&gSetupVariableGuid,
TcgSetupAttr,
sizeof (TCG_SETUP),
&TcgSetup
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TcgConfigDriver] ERROR: Fail to set TCG_SETUP_NAME!\n"));
}
//
// Save to variable so platform driver can get it.
//
Status = gRT->SetVariable (
TCG2_STORAGE_NAME,
&gTcg2ConfigFormSetGuid,
Tcg2ConfigurationAttr,
sizeof (Tcg2Configuration),
&Tcg2Configuration
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TcgConfigDriver] ERROR: Fail to set TCG2_STORAGE_NAME!\n"));
}
Status = gRT->SetVariable (
L"TCG_CONFIGURATION",
&gTcgConfigFormSetGuid,
TcgConfigurationAttr,
sizeof (TcgConfiguration),
&TcgConfiguration
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TcgConfigDriver] ERROR: Fail to set TCG_CONFIGURATION!\n"));
}
}
EFI_STATUS
EFIAPI
InitializeTcgSetup (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
EFI_EVENT EndOfDxeEvent;
EndOfDxeEvent = NULL;
//
// Register an end of DXE event for setting up Tcg variables
//
Status = gBS->CreateEventEx (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
InitializeTcgSetupCallback,
NULL,
&gEfiEndOfDxeEventGroupGuid,
&EndOfDxeEvent
);
ASSERT_EFI_ERROR (Status);
return Status;
}
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