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MdePkg: Introduce basic Tdx functions in BaseLib

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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>
This commit is contained in:
Min Xu
2021-11-10 09:00:41 +08:00
committed by mergify[bot]
parent 77228269e7
commit 818bc9596d
6 changed files with 446 additions and 0 deletions
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66
MdePkg/Include/Library/BaseLib.h
View File

@@ -4759,6 +4759,72 @@ SpeculationBarrier (
VOID
);
#if defined (MDE_CPU_X64) || defined (MDE_CPU_IA32)
/**
The TDCALL instruction causes a VM exit to the Intel TDX module. It is
used to call guest-side Intel TDX functions, either local or a TD exit
to the host VMM, as selected by Leaf.
@param[in] Leaf Leaf number of TDCALL instruction
@param[in] Arg1 Arg1
@param[in] Arg2 Arg2
@param[in] Arg3 Arg3
@param[in,out] Results Returned result of the Leaf function
@return 0 A successful call
@return Other See individual leaf functions
**/
UINTN
EFIAPI
TdCall (
IN UINT64 Leaf,
IN UINT64 Arg1,
IN UINT64 Arg2,
IN UINT64 Arg3,
IN OUT VOID *Results
);
/**
TDVMALL is a leaf function 0 for TDCALL. It helps invoke services from the
host VMM to pass/receive information.
@param[in] Leaf Number of sub-functions
@param[in] Arg1 Arg1
@param[in] Arg2 Arg2
@param[in] Arg3 Arg3
@param[in] Arg4 Arg4
@param[in,out] Results Returned result of the sub-function
@return 0 A successful call
@return Other See individual sub-functions
**/
UINTN
EFIAPI
TdVmCall (
IN UINT64 Leaf,
IN UINT64 Arg1,
IN UINT64 Arg2,
IN UINT64 Arg3,
IN UINT64 Arg4,
IN OUT VOID *Results
);
/**
Probe if TD is enabled.
@return TRUE TD is enabled.
@return FALSE TD is not enabled.
**/
BOOLEAN
EFIAPI
TdIsEnabled (
VOID
);
#endif
#if defined (MDE_CPU_X64)
//
// The page size for the PVALIDATE instruction