Re: [PATCH 2/3] MdePkg/MdeModule: Add support for RuntimeServicesSupported variable

["Ni, Ray" <ray.ni@intel.com>]

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

+ VarCheck expert Star Zeng.

> -----Original Message-----
> From: Jeff Brasen <jbrasen@nvidia.com>
> Sent: Saturday, November 16, 2019 1:43 AM
> To: edk2-devel@lists.01.org; devel@edk2.groups.io
> Cc: Jeff Brasen <jbrasen@nvidia.com>; Gao, Liming <liming.gao@intel.com>;
> Kinney, Michael D <michael.d.kinney@intel.com>; Wu, Hao A
> <hao.a.wu@intel.com>; Ni, Ray <ray.ni@intel.com>; Gao, Zhichao
> <zhichao.gao@intel.com>
> Subject: [PATCH 2/3] MdePkg/MdeModule: Add support for
> RuntimeServicesSupported variable
> 
> Add support for new global variable defined in the UEFI 2.8 specification. This
> provides a bitmask of which calls are implemented by the firmware during
> runtime services.
> 
> Signed-off-by: Jeff Brasen <jbrasen@nvidia.com>
> ---
>  .../Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c        | 11
> +++++++++++
>  MdePkg/Include/Guid/GlobalVariable.h                          |  7 +++++++
>  2 files changed, 18 insertions(+)
> 
> diff --git
> a/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c
> b/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c
> index e3bf04a..4264892 100644
> --- a/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c
> +++ b/MdeModulePkg/Library/VarCheckUefiLib/VarCheckUefiLibNullClass.c
> @@ -553,6 +553,17 @@ UEFI_DEFINED_VARIABLE_ENTRY
> mGlobalVariableList[] = {
>      },
>      NULL
>    },
> +  {
> +    EFI_RUNTIME_SERVICES_SUPPORTED_VARIABLE_NAME,
> +    {
> +      VAR_CHECK_VARIABLE_PROPERTY_REVISION,
> +      VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY,
> +      VARIABLE_ATTRIBUTE_BS_RT,
> +      sizeof (UINT16),
> +      sizeof (UINT16)
> +    },
> +    NULL
> +  },
>  };
> 
>  UEFI_DEFINED_VARIABLE_ENTRY mGlobalVariableList2[] = { diff --git
> a/MdePkg/Include/Guid/GlobalVariable.h
> b/MdePkg/Include/Guid/GlobalVariable.h
> index 7abc103..06a8a12 100644
> --- a/MdePkg/Include/Guid/GlobalVariable.h
> +++ b/MdePkg/Include/Guid/GlobalVariable.h
> @@ -182,5 +182,12 @@ extern EFI_GUID gEfiGlobalVariableGuid;  /// Its
> attribute is BS+RT.
>  ///
>  #define EFI_VENDOR_KEYS_VARIABLE_NAME               L"VendorKeys"
> +///
> +/// Bitmask of which calls are implemented by the firmware during runtime
> services.
> +/// RT access is required only if GetVariable() is implemented by runtime
> services.
> +/// Should be treated as read-only.
> +/// Its attribute is BS+RT.
> +///
> +#define EFI_RUNTIME_SERVICES_SUPPORTED_VARIABLE_NAME
> L"RuntimeServicesSupported"
> 
>  #endif
> --
> 2.7.4