d3109e5f18
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4243 TdxHelperLib provides below helper functions for a td-guest. - TdxHelperProcessTdHob - TdxHelperMeasureTdHob - TdxHelperMeasureCfvImage - TdxHelperBuildGuidHobForTdxMeasurement TdxHelperLibNull is the NULL instance of TdxHelperLib. Cc: Erdem Aktas <erdemaktas@google.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Michael Roth <michael.roth@amd.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Signed-off-by: Min Xu <min.m.xu@intel.com>
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/** @file
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NULL instance of TdxHelperLib
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Copyright (c) 2022 - 2023, 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 <Base.h>
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#include <PiPei.h>
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/**
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In Tdx guest, some information need to be passed from host VMM to guest
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firmware. For example, the memory resource, etc. These information are
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prepared by host VMM and put in TdHob which is described in TdxMetadata.
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TDVF processes the TdHob to accept memories.
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@retval EFI_SUCCESS Successfully process the TdHob
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@retval Others Other error as indicated
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**/
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EFI_STATUS
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EFIAPI
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TdxHelperProcessTdHob (
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VOID
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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In Tdx guest, TdHob is passed from host VMM to guest firmware and it contains
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the information of the memory resource. From the security perspective before
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it is consumed, it should be measured and extended.
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*
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* @retval EFI_SUCCESS Successfully measure the TdHob
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* @retval Others Other error as indicated
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*/
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EFI_STATUS
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EFIAPI
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TdxHelperMeasureTdHob (
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VOID
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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* In Tdx guest, Configuration FV (CFV) is treated as external input because it
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* may contain the data provided by VMM. From the sucurity perspective Cfv image
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* should be measured before it is consumed.
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*
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* @retval EFI_SUCCESS Successfully measure the CFV image
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* @retval Others Other error as indicated
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*/
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EFI_STATUS
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EFIAPI
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TdxHelperMeasureCfvImage (
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VOID
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)
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{
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return EFI_UNSUPPORTED;
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}
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/**
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Build the GuidHob for tdx measurements which were done in SEC phase.
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The measurement values are stored in WorkArea.
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@retval EFI_SUCCESS The GuidHob is built successfully
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@retval Others Other errors as indicated
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**/
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EFI_STATUS
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EFIAPI
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TdxHelperBuildGuidHobForTdxMeasurement (
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VOID
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)
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{
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return EFI_UNSUPPORTED;
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}
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