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- /** @file
- The module entry point for Tcg2 configuration module.
- Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
- **/
- #include <PiPei.h>
- #include <Guid/TpmInstance.h>
- #include <Library/BaseLib.h>
- #include <Library/BaseMemoryLib.h>
- #include <Library/DebugLib.h>
- #include <Library/MemoryAllocationLib.h>
- #include <Library/PeiServicesLib.h>
- #include <Library/PcdLib.h>
- #include <Ppi/ReadOnlyVariable2.h>
- #include <Ppi/TpmInitialized.h>
- #include <Protocol/Tcg2Protocol.h>
- #include "Tcg2ConfigNvData.h"
- #include "Tcg2Internal.h"
- TPM_INSTANCE_ID mTpmInstanceId[] = TPM_INSTANCE_ID_LIST;
- CONST EFI_PEI_PPI_DESCRIPTOR gTpmSelectedPpi = {
- (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
- &gEfiTpmDeviceSelectedGuid,
- NULL
- };
- EFI_PEI_PPI_DESCRIPTOR mTpmInitializationDonePpiList = {
- EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST,
- &gPeiTpmInitializationDonePpiGuid,
- NULL
- };
- /**
- This routine check both SetupVariable and real TPM device, and return final TpmDevice configuration.
- @param SetupTpmDevice TpmDevice configuration in setup driver
- @return TpmDevice configuration
- **/
- UINT8
- DetectTpmDevice (
- IN UINT8 SetupTpmDevice
- );
- /**
- The entry point for Tcg2 configuration driver.
- @param FileHandle Handle of the file being invoked.
- @param PeiServices Describes the list of possible PEI Services.
- @retval EFI_SUCCESS Convert variable to PCD successfully.
- @retval Others Fail to convert variable to PCD.
- **/
- EFI_STATUS
- EFIAPI
- Tcg2ConfigPeimEntryPoint (
- IN EFI_PEI_FILE_HANDLE FileHandle,
- IN CONST EFI_PEI_SERVICES **PeiServices
- )
- {
- UINTN Size;
- EFI_STATUS Status;
- EFI_STATUS Status2;
- EFI_PEI_READ_ONLY_VARIABLE2_PPI *VariablePpi;
- TCG2_CONFIGURATION Tcg2Configuration;
- UINTN Index;
- UINT8 TpmDevice;
- Status = PeiServicesLocatePpi (&gEfiPeiReadOnlyVariable2PpiGuid, 0, NULL, (VOID **) &VariablePpi);
- ASSERT_EFI_ERROR (Status);
- Size = sizeof(Tcg2Configuration);
- Status = VariablePpi->GetVariable (
- VariablePpi,
- TCG2_STORAGE_NAME,
- &gTcg2ConfigFormSetGuid,
- NULL,
- &Size,
- &Tcg2Configuration
- );
- if (EFI_ERROR (Status)) {
- //
- // Variable not ready, set default value
- //
- Tcg2Configuration.TpmDevice = TPM_DEVICE_DEFAULT;
- }
- //
- // Validation
- //
- if ((Tcg2Configuration.TpmDevice > TPM_DEVICE_MAX) || (Tcg2Configuration.TpmDevice < TPM_DEVICE_MIN)) {
- Tcg2Configuration.TpmDevice = TPM_DEVICE_DEFAULT;
- }
- //
- // Although we have SetupVariable info, we still need detect TPM device manually.
- //
- DEBUG ((EFI_D_INFO, "Tcg2Configuration.TpmDevice from Setup: %x\n", Tcg2Configuration.TpmDevice));
- if (PcdGetBool (PcdTpmAutoDetection)) {
- TpmDevice = DetectTpmDevice (Tcg2Configuration.TpmDevice);
- DEBUG ((EFI_D_INFO, "TpmDevice final: %x\n", TpmDevice));
- if (TpmDevice != TPM_DEVICE_NULL) {
- Tcg2Configuration.TpmDevice = TpmDevice;
- }
- } else {
- TpmDevice = Tcg2Configuration.TpmDevice;
- }
- //
- // Convert variable to PCD.
- // This is work-around because there is no guarantee DynamicHiiPcd can return correct value in DXE phase.
- // Using DynamicPcd instead.
- //
- // NOTE: Tcg2Configuration variable contains the desired TpmDevice type,
- // while PcdTpmInstanceGuid PCD contains the real detected TpmDevice type
- //
- for (Index = 0; Index < sizeof(mTpmInstanceId)/sizeof(mTpmInstanceId[0]); Index++) {
- if (TpmDevice == mTpmInstanceId[Index].TpmDevice) {
- Size = sizeof(mTpmInstanceId[Index].TpmInstanceGuid);
- Status = PcdSetPtrS (PcdTpmInstanceGuid, &Size, &mTpmInstanceId[Index].TpmInstanceGuid);
- ASSERT_EFI_ERROR (Status);
- DEBUG ((EFI_D_INFO, "TpmDevice PCD: %g\n", &mTpmInstanceId[Index].TpmInstanceGuid));
- break;
- }
- }
- //
- // Selection done
- //
- Status = PeiServicesInstallPpi (&gTpmSelectedPpi);
- ASSERT_EFI_ERROR (Status);
- //
- // Even if no TPM is selected or detected, we still need intall TpmInitializationDonePpi.
- // Because TcgPei or Tcg2Pei will not run, but we still need a way to notify other driver.
- // Other driver can know TPM initialization state by TpmInitializedPpi.
- //
- if (CompareGuid (PcdGetPtr(PcdTpmInstanceGuid), &gEfiTpmDeviceInstanceNoneGuid)) {
- Status2 = PeiServicesInstallPpi (&mTpmInitializationDonePpiList);
- ASSERT_EFI_ERROR (Status2);
- }
- return Status;
- }
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