Re: [PATCH 3/3] MdePkg/UefiRuntimeLib: Do not allow to be linked by DXE driver

["Gao, Liming" <liming.gao@intel.com>]

Reviewed-by: Liming Gao <liming.gao@intel.com>

> -----Original Message-----
> From: Ni, Ruiyu
> Sent: Friday, June 1, 2018 3:22 PM
> To: edk2-devel@lists.01.org
> Cc: Gao, Liming <liming.gao@intel.com>; Zeng, Star <star.zeng@intel.com>
> Subject: [PATCH 3/3] MdePkg/UefiRuntimeLib: Do not allow to be linked by DXE driver
> 
> When UefiRuntimeLib links to a DXE driver, its constructor
> still registers a Virtual Address Change event. The event callback
> will get called when RT.SetVirtualAddressMap() is called from OS.
> But when the driver is a DXE driver, the memory occupied by the
> callback function might be zeroed or used by OS since the BS type
> memory is free memory when entering to RT phase.
> 
> The patch reverts commit 97511979b4fdd84cf7cd51e43c22dc03e79bd4f3
> "MdePkg/UefiRuntimeLib: Support more module types."
> It makes sure that DXE driver cannot link to this library.
> 
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Star Zeng <star.zeng@intel.com>
> ---
>  MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf b/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
> index d053da545a..8f46495fc5 100644
> --- a/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
> +++ b/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf
> @@ -5,7 +5,7 @@
>  #  EVT_SIGNAL_EXIT_BOOT_SERVICES event, to provide runtime services.
>  # This instance also supports SAL drivers for better performance.
>  #
> -# Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
>  #
>  #  This program and the accompanying materials
>  #  are licensed and made available under the terms and conditions of the BSD License
> @@ -24,7 +24,7 @@ [Defines]
>    FILE_GUID                      = b1ee6c28-54aa-4d17-b705-3e28ccb27b2e
>    MODULE_TYPE                    = DXE_RUNTIME_DRIVER
>    VERSION_STRING                 = 1.0
> -  LIBRARY_CLASS                  = UefiRuntimeLib|DXE_RUNTIME_DRIVER DXE_SAL_DRIVER DXE_CORE DXE_DRIVER
> DXE_SMM_DRIVER
> +  LIBRARY_CLASS                  = UefiRuntimeLib|DXE_RUNTIME_DRIVER DXE_SAL_DRIVER
> 
>    CONSTRUCTOR                    = RuntimeDriverLibConstruct
>    DESTRUCTOR                     = RuntimeDriverLibDeconstruct
> --
> 2.16.1.windows.1