diff options
Diffstat (limited to 'MdePkg/Include/Register/Intel/Cpuid.h')
-rw-r--r-- | MdePkg/Include/Register/Intel/Cpuid.h | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/MdePkg/Include/Register/Intel/Cpuid.h b/MdePkg/Include/Register/Intel/Cpuid.h index bd6349d794..350bf60252 100644 --- a/MdePkg/Include/Register/Intel/Cpuid.h +++ b/MdePkg/Include/Register/Intel/Cpuid.h @@ -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
@@ -3690,6 +3692,35 @@ 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
@param EAX CPUID_EXTENDED_FUNCTION (0x80000000)
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