[edk2-devel] [PATCH] MdePkg Cpuid.h: Define CPUID.(EAX=7, ECX=0):EDX[30]

[Ni, Ray]

Reviewed-by: Ray Ni <ray.ni at intel.com>

> -----Original Message-----
> From: Zeng, Star <star.zeng at intel.com>
> Sent: Thursday, October 21, 2021 11:28 AM
> To: devel at edk2.groups.io
> Cc: Zeng, Star <star.zeng at intel.com>; Kinney, Michael D <michael.d.kinney at intel.com>; Liming Gao
> <gaoliming at byosoft.com.cn>; Liu, Zhiguang <zhiguang.liu at intel.com>; Ni, Ray <ray.ni at intel.com>
> Subject: [PATCH] MdePkg Cpuid.h: Define CPUID.(EAX=7,ECX=0):EDX[30]
> 
> This patch follows new Intel SDM to define CPUID.(EAX=7,ECX=0):EDX[30].
> 
> Signed-off-by: Star Zeng <star.zeng at intel.com>
> Cc: Michael D Kinney <michael.d.kinney at intel.com>
> Cc: Liming Gao <gaoliming at byosoft.com.cn>
> Cc: Zhiguang Liu <zhiguang.liu at intel.com>
> Cc: Ray Ni <ray.ni at intel.com>
> ---
>  MdePkg/Include/Register/Intel/Cpuid.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/MdePkg/Include/Register/Intel/Cpuid.h b/MdePkg/Include/Register/Intel/Cpuid.h
> index 6f77e174c115..5ec85ba561ac 100644
> --- a/MdePkg/Include/Register/Intel/Cpuid.h
> +++ b/MdePkg/Include/Register/Intel/Cpuid.h
> @@ -1587,9 +1587,9 @@ typedef union {
>      ///
> 
>      UINT32  EnumeratesSupportForCapability:1;
> 
>      ///
> 
> -    /// [Bit 30] Reserved.
> 
> +    /// [Bit 30] Enumerates support for the IA32_CORE_CAPABILITIES MSR.
> 
>      ///
> 
> -    UINT32  Reserved3:1;
> 
> +    UINT32  EnumeratesSupportForCoreCapabilitiesMsr:1;
> 
>      ///
> 
>      /// [Bit 31] Enumerates support for Speculative Store Bypass Disable (SSBD).
> 
>      /// Processors that set this bit sup-port the IA32_SPEC_CTRL MSR. They allow
> 
> --
> 2.27.0.windows.1



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