db04386fd9
Test if the user need to confirm TPM Physical presence commands. Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
81 lines
2.3 KiB
C
81 lines
2.3 KiB
C
/** @file
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Returns the platform specific configuration for the QEMU PPI.
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Caution: This module requires additional review when modified.
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This driver will have external input - variable.
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This external input must be validated carefully to avoid security issue.
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Copyright (C) 2018, Red Hat, Inc.
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Copyright (c) 2018, IBM Corporation. All rights reserved.<BR>
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Copyright (c) 2013 - 2016, 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 <PiDxe.h>
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#include <IndustryStandard/QemuTpm.h>
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#include <Library/Tcg2PhysicalPresencePlatformLib.h>
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#include <Library/HobLib.h>
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#include <Library/DebugLib.h>
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#include <Library/DxeServicesTableLib.h>
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#include <Guid/TcgPhysicalPresenceGuid.h>
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/**
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Reads QEMU PPI config from TcgPhysicalPresenceInfoHobGuid.
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@param[out] The Config structure to read to.
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@param[out] The PPIinMMIO is True when the PPI is in MMIO memory space
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@retval EFI_SUCCESS Operation completed successfully.
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@retval EFI_PROTOCOL_ERROR Invalid HOB entry.
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**/
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EFI_STATUS
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TpmPPIPlatformReadConfig (
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OUT QEMU_FWCFG_TPM_CONFIG *Config,
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OUT BOOLEAN *PPIinMMIO
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)
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{
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EFI_HOB_GUID_TYPE *GuidHob;
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TCG_PHYSICAL_PRESENCE_INFO *pPPInfo;
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//
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// Find the TPM Physical Presence HOB
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//
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GuidHob = GetFirstGuidHob (&gEfiTcgPhysicalPresenceInfoHobGuid);
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if (GuidHob == NULL) {
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return EFI_NOT_FOUND;
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}
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pPPInfo = (TCG_PHYSICAL_PRESENCE_INFO *)GET_GUID_HOB_DATA (GuidHob);
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if (pPPInfo->PpiAddress == 0 || pPPInfo->PpiAddress == ~0) {
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return EFI_NOT_FOUND;
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} else {
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Config->PpiAddress = pPPInfo->PpiAddress;
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}
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if (pPPInfo->TpmVersion == UEFIPAYLOAD_TPM_VERSION_1_2) {
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Config->TpmVersion = QEMU_TPM_VERSION_1_2;
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} else if (pPPInfo->TpmVersion == UEFIPAYLOAD_TPM_VERSION_2) {
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Config->TpmVersion = QEMU_TPM_VERSION_2;
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} else {
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return EFI_UNSUPPORTED;
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}
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if (pPPInfo->PpiVersion == UEFIPAYLOAD_TPM_PPI_VERSION_NONE) {
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Config->PpiVersion = QEMU_TPM_PPI_VERSION_NONE;
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} else if (pPPInfo->PpiVersion == UEFIPAYLOAD_TPM_PPI_VERSION_1_30) {
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Config->PpiVersion = QEMU_TPM_PPI_VERSION_1_30;
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} else {
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return EFI_UNSUPPORTED;
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}
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*PPIinMMIO = FALSE;
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return EFI_SUCCESS;
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}
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