[edk2-devel] [PATCH v2 2/3] MdePkg/BaseLib.h: Update IA32_CR4 structure for 5-level paging

[Dong, Eric]

Reviewed-by: Eric Dong <eric.dong at intel.com>

> -----Original Message-----
> From: Ni, Ray
> Sent: Wednesday, July 3, 2019 2:54 PM
> To: devel at edk2.groups.io
> Cc: Dong, Eric <eric.dong at intel.com>; Laszlo Ersek <lersek at redhat.com>
> Subject: [PATCH v2 2/3] MdePkg/BaseLib.h: Update IA32_CR4 structure for
> 5-level paging
> 
> 5-level paging is documented in white paper:
> https://software.intel.com/sites/default/files/managed/2b/80/5-
> level_paging_white_paper.pdf
> 
> Commit f8113e25001e715390127f23e2197252cbd6d1a2
> changed Cpuid.h already.
> 
> This patch updates IA32_CR4 structure to include LA57 field.
> 
> Signed-off-by: Ray Ni <ray.ni at intel.com>
> Cc: Eric Dong <eric.dong at intel.com>
> Regression-tested-by: Laszlo Ersek <lersek at redhat.com>
> ---
>  MdePkg/Include/Library/BaseLib.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/MdePkg/Include/Library/BaseLib.h
> b/MdePkg/Include/Library/BaseLib.h
> index ebd7dd274c..a22bfc9fad 100644
> --- a/MdePkg/Include/Library/BaseLib.h
> +++ b/MdePkg/Include/Library/BaseLib.h
> @@ -5324,7 +5324,8 @@ typedef union {
>      UINT32  OSXMMEXCPT:1;   ///< Operating System Support for
>                              ///< Unmasked SIMD Floating Point
>                              ///< Exceptions.
> -    UINT32  Reserved_0:2;   ///< Reserved.
> +    UINT32  Reserved_2:1;   ///< Reserved.
> +    UINT32  LA57:1;         ///< Linear Address 57bit.
>      UINT32  VMXE:1;         ///< VMX Enable
>      UINT32  Reserved_1:18;  ///< Reserved.
>    } Bits;
> --
> 2.21.0.windows.1


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