mirror of https://github.com/acidanthera/audk.git
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
/** @file
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Set TPM device type
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In SecurityPkg, this module initializes the TPM device type based on a UEFI
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variable and/or hardware detection. In OvmfPkg, the module only performs TPM2
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hardware detection.
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Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
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Copyright (C) 2018, Red Hat, Inc.
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This program and the accompanying materials are licensed and made available
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under the terms and conditions of the BSD License which accompanies this
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distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
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WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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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/DebugLib.h>
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#include <Library/PeiServicesLib.h>
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#include <Library/Tpm2DeviceLib.h>
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#include <Ppi/TpmInitialized.h>
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STATIC CONST EFI_PEI_PPI_DESCRIPTOR mTpmSelectedPpi = {
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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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STATIC CONST 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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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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**/
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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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DEBUG ((DEBUG_INFO, "%a\n", __FUNCTION__));
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Status = Tpm2RequestUseTpm ();
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if (!EFI_ERROR (Status)) {
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DEBUG ((DEBUG_INFO, "%a: TPM2 detected\n", __FUNCTION__));
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Size = sizeof (gEfiTpmDeviceInstanceTpm20DtpmGuid);
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Status = PcdSetPtrS (
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PcdTpmInstanceGuid,
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&Size,
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&gEfiTpmDeviceInstanceTpm20DtpmGuid
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);
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ASSERT_EFI_ERROR (Status);
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} else {
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DEBUG ((DEBUG_INFO, "%a: no TPM2 detected\n", __FUNCTION__));
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//
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// If no TPM2 was detected, we still need to install
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// TpmInitializationDonePpi. Namely, Tcg2Pei will exit early upon seeing
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// the default (all-bits-zero) contents of PcdTpmInstanceGuid, thus we have
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// to install the PPI in its place, in order to unblock any dependent
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// PEIMs.
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//
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Status = PeiServicesInstallPpi (&mTpmInitializationDonePpiList);
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ASSERT_EFI_ERROR (Status);
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}
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//
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// Selection done
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//
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Status = PeiServicesInstallPpi (&mTpmSelectedPpi);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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