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MdePkg: Update Cpuid.h for Tdx 

RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429

Guest software can be designed to run either as a TD, as a legacy virtual
machine, or directly on the CPU, based on enumeration of its run-time
environment. [TDX-Module] Chap 10.2 defines the flow and the new CPUID
leaf 0x21.

[TDX-Module] Architecture Specification: Intel(R) Trust Domain Extensions
Module, Chap 10.2, 344425-003US, August 2021
https://www.intel.com/content/dam/develop/external/us/en/documents/
tdx-module-1.0-public-spec-v0.931.pdf

Cc: Ray Ni <ray.ni@intel.com>
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>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
This commit is contained in:
Min Xu 2022-03-16 10:56:25 +08:00 committed by mergify[bot]
parent 3f0c788a5f
commit 77228269e7
1 changed files with 33 additions and 2 deletions
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35
MdePkg/Include/Register/Intel/Cpuid.h
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@ -12,6 +12,8 @@
@par Specification Reference:
Intel(R) 64 and IA-32 Architectures Software Developer's Manual, Volume 2A,
November 2018, CPUID instruction.
Architecture Specification: Intel(R) Trust Domain Extensions Module, Chap 10.2
344425-003US, August 2021
**/
@ -321,9 +323,9 @@ typedef union {
///
UINT32 RDRAND : 1;
///
/// [Bit 31] Always returns 0.
/// [Bit 31] A value of 1 indicates that processor is in Para-Virtualized.
///
UINT32 NotUsed : 1;
UINT32 ParaVirtualized : 1;
} Bits;
///
/// All bit fields as a 32-bit value
@ -3689,6 +3691,35 @@ typedef union {
/// @}
///
/**
CPUID Guest TD Run Time Environment Enumeration Leaf
@note
Guest software can be designed to run either as a TD, as a legacy virtual machine,
or directly on the CPU, based on enumeration of its run-time environment.
CPUID leaf 21H emulation is done by the Intel TDX module. Sub-leaf 0 returns the values
shown below. Other sub-leaves return 0 in EAX/EBX/ECX/EDX.
EAX: 0x00000000
EBX: 0x65746E49 "Inte"
ECX: 0x20202020 " "
EDX: 0x5844546C "lTDX"
@param EAX CPUID_GUESTTD_RUNTIME_ENVIRONMENT (0x21)
@param ECX Level number
**/
#define CPUID_GUESTTD_RUNTIME_ENVIRONMENT 0x21
///
/// @{ CPUID Guest TD signature values returned by Intel processors
///
#define CPUID_GUESTTD_SIGNATURE_GENUINE_INTEL_EBX SIGNATURE_32 ('I', 'n', 't', 'e')
#define CPUID_GUESTTD_SIGNATURE_GENUINE_INTEL_ECX SIGNATURE_32 (' ', ' ', ' ', ' ')
#define CPUID_GUESTTD_SIGNATURE_GENUINE_INTEL_EDX SIGNATURE_32 ('l', 'T', 'D', 'X')
///
/// @}
///
/**
CPUID Extended Function