From: Min M Xu Date: Fri, 3 Feb 2023 03:31:37 +0000 (+0800) Subject: OvmfPkg/IntelTdx: Add TdxHelperLibNull X-Git-Tag: edk2-stable202302~63 X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=d3109e5f185dfa411bf5b94df574a3dc841786e9 OvmfPkg/IntelTdx: Add TdxHelperLibNull 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 Cc: James Bottomley Cc: Jiewen Yao Cc: Gerd Hoffmann Cc: Tom Lendacky Cc: Michael Roth Acked-by: Gerd Hoffmann Reviewed-by: Jiewen Yao Signed-off-by: Min Xu --- diff --git a/OvmfPkg/Include/Library/TdxHelperLib.h b/OvmfPkg/Include/Library/TdxHelperLib.h new file mode 100644 index 0000000000..199aade42f --- /dev/null +++ b/OvmfPkg/Include/Library/TdxHelperLib.h @@ -0,0 +1,70 @@ +/** @file + TdxHelperLib header file + + Copyright (c) 2021 - 2023, Intel Corporation. All rights reserved.
+ SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef TDX_HELPER_LIB_H +#define TDX_HELPER_LIB_H + +#include + +/** + In Tdx guest, some information need to be passed from host VMM to guest + firmware. For example, the memory resource, etc. These information are + prepared by host VMM and put in TdHob which is described in TdxMetadata. + TDVF processes the TdHob to accept memories. + + @retval EFI_SUCCESS Successfully process the TdHob + @retval Others Other error as indicated +**/ +EFI_STATUS +EFIAPI +TdxHelperProcessTdHob ( + VOID + ); + +/** + In Tdx guest, TdHob is passed from host VMM to guest firmware and it contains + the information of the memory resource. From the security perspective before + it is consumed, it should be measured and extended. + * + * @retval EFI_SUCCESS Successfully measure the TdHob + * @retval Others Other error as indicated + */ +EFI_STATUS +EFIAPI +TdxHelperMeasureTdHob ( + VOID + ); + +/** + * In Tdx guest, Configuration FV (CFV) is treated as external input because it + * may contain the data provided by VMM. From the sucurity perspective Cfv image + * should be measured before it is consumed. + * + * @retval EFI_SUCCESS Successfully measure the CFV image + * @retval Others Other error as indicated + */ +EFI_STATUS +EFIAPI +TdxHelperMeasureCfvImage ( + VOID + ); + +/** + Build the GuidHob for tdx measurements which were done in SEC phase. + The measurement values are stored in WorkArea. + + @retval EFI_SUCCESS The GuidHob is built successfully + @retval Others Other errors as indicated +**/ +EFI_STATUS +EFIAPI +TdxHelperBuildGuidHobForTdxMeasurement ( + VOID + ); + +#endif diff --git a/OvmfPkg/IntelTdx/TdxHelperLib/TdxHelperLibNull.inf b/OvmfPkg/IntelTdx/TdxHelperLib/TdxHelperLibNull.inf new file mode 100644 index 0000000000..27d07b3886 --- /dev/null +++ b/OvmfPkg/IntelTdx/TdxHelperLib/TdxHelperLibNull.inf @@ -0,0 +1,32 @@ +## @file +# TdxHelperLib NULL instance +# +# Copyright (c) 2021 - 2023, Intel Corporation. All rights reserved.
+# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION = 0x00010005 + BASE_NAME = TdxHelperLibNull + FILE_GUID = 853603b2-53ea-463d-93e6-35d09a79e358 + MODULE_TYPE = BASE + VERSION_STRING = 1.0 + LIBRARY_CLASS = TdxHelperLib + +# +# The following information is for reference only and not required by the build tools. +# +# VALID_ARCHITECTURES = X64 +# + +[Sources] + TdxHelperNull.c + +[Packages] + MdePkg/MdePkg.dec + OvmfPkg/OvmfPkg.dec + +[LibraryClasses] + BaseLib diff --git a/OvmfPkg/IntelTdx/TdxHelperLib/TdxHelperNull.c b/OvmfPkg/IntelTdx/TdxHelperLib/TdxHelperNull.c new file mode 100644 index 0000000000..a2125190d6 --- /dev/null +++ b/OvmfPkg/IntelTdx/TdxHelperLib/TdxHelperNull.c @@ -0,0 +1,79 @@ +/** @file + NULL instance of TdxHelperLib + + Copyright (c) 2022 - 2023, Intel Corporation. All rights reserved.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include + +/** + In Tdx guest, some information need to be passed from host VMM to guest + firmware. For example, the memory resource, etc. These information are + prepared by host VMM and put in TdHob which is described in TdxMetadata. + TDVF processes the TdHob to accept memories. + + @retval EFI_SUCCESS Successfully process the TdHob + @retval Others Other error as indicated +**/ +EFI_STATUS +EFIAPI +TdxHelperProcessTdHob ( + VOID + ) +{ + return EFI_UNSUPPORTED; +} + +/** + In Tdx guest, TdHob is passed from host VMM to guest firmware and it contains + the information of the memory resource. From the security perspective before + it is consumed, it should be measured and extended. + * + * @retval EFI_SUCCESS Successfully measure the TdHob + * @retval Others Other error as indicated + */ +EFI_STATUS +EFIAPI +TdxHelperMeasureTdHob ( + VOID + ) +{ + return EFI_UNSUPPORTED; +} + +/** + * In Tdx guest, Configuration FV (CFV) is treated as external input because it + * may contain the data provided by VMM. From the sucurity perspective Cfv image + * should be measured before it is consumed. + * + * @retval EFI_SUCCESS Successfully measure the CFV image + * @retval Others Other error as indicated + */ +EFI_STATUS +EFIAPI +TdxHelperMeasureCfvImage ( + VOID + ) +{ + return EFI_UNSUPPORTED; +} + +/** + Build the GuidHob for tdx measurements which were done in SEC phase. + The measurement values are stored in WorkArea. + + @retval EFI_SUCCESS The GuidHob is built successfully + @retval Others Other errors as indicated +**/ +EFI_STATUS +EFIAPI +TdxHelperBuildGuidHobForTdxMeasurement ( + VOID + ) +{ + return EFI_UNSUPPORTED; +} diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec index a22eb246c6..be30547474 100644 --- a/OvmfPkg/OvmfPkg.dec +++ b/OvmfPkg/OvmfPkg.dec @@ -98,6 +98,10 @@ # SerializeVariablesLib|Include/Library/SerializeVariablesLib.h + ## @libraryclass TdxHelper + # + TdxHelperLib|Include/Library/TdxHelperLib.h + ## @libraryclass Declares utility functions for virtio device drivers. VirtioLib|Include/Library/VirtioLib.h