818bc9596d
RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429 Introduce basic Tdx functions in BaseLib: - TdCall () - TdVmCall () - TdIsEnabled () Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Cc: Brijesh Singh <brijesh.singh@amd.com> Cc: Erdem Aktas <erdemaktas@google.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Signed-off-by: Min Xu <min.m.xu@intel.com>
84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/** @file
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Null stub of TdxLib
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Copyright (c) 2021, 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 <Library/BaseLib.h>
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#include <Uefi/UefiBaseType.h>
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/**
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The TDCALL instruction causes a VM exit to the Intel TDX module. It is
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used to call guest-side Intel TDX functions, either local or a TD exit
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to the host VMM, as selected by Leaf.
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Leaf functions are described at <https://software.intel.com/content/
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www/us/en/develop/articles/intel-trust-domain-extensions.html>
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@param[in] Leaf Leaf number of TDCALL instruction
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@param[in] Arg1 Arg1
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@param[in] Arg2 Arg2
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@param[in] Arg3 Arg3
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@param[in,out] Results Returned result of the Leaf function
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@return EFI_SUCCESS
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@return Other See individual leaf functions
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**/
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UINTN
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EFIAPI
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TdCall (
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IN UINT64 Leaf,
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IN UINT64 Arg1,
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IN UINT64 Arg2,
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IN UINT64 Arg3,
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IN OUT VOID *Results
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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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TDVMALL is a leaf function 0 for TDCALL. It helps invoke services from the
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host VMM to pass/receive information.
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@param[in] Leaf Number of sub-functions
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@param[in] Arg1 Arg1
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@param[in] Arg2 Arg2
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@param[in] Arg3 Arg3
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@param[in] Arg4 Arg4
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@param[in,out] Results Returned result of the sub-function
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@return EFI_SUCCESS
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@return Other See individual sub-functions
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**/
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UINTN
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EFIAPI
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TdVmCall (
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IN UINT64 Leaf,
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IN UINT64 Arg1,
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IN UINT64 Arg2,
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IN UINT64 Arg3,
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IN UINT64 Arg4,
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IN OUT VOID *Results
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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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Probe if TD is enabled.
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@return TRUE TD is enabled.
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@return FALSE TD is not enabled.
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**/
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BOOLEAN
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EFIAPI
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TdIsEnabled (
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)
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{
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return FALSE;
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}
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