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