回复: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory allocation for SP type

["gaoliming via groups.io" <gaoliming=byosoft.com.cn@groups.io>]

Can you create pull request for this change? I will add my review for it. 

> -----邮件原件-----
> 发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Dhaval Sharma
> 发送时间: 2024年6月11日 12:09
> 收件人: devel@edk2.groups.io
> 抄送: Liming Gao <gaoliming@byosoft.com.cn>
> 主题: [edk2-devel] [PATCH v1 1/1] MdeModulePkg: Avoid efi memory
allocation
> for SP type
> 
> Most of the times it is desirable not to use special purpose
> memory for regular edk2 usages. That memory (HBm/CXL) are
> either meant for special purposes or are less reliable to
> be used. So avoid using them as long as possible. We could
> also introduce PCD for this control.
> 
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
> ---
>  MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c
> b/MdeModulePkg/Core/Dxe/Mem/Page.c
> index 5a51d9df1a29..e4daa741b971 100644
> --- a/MdeModulePkg/Core/Dxe/Mem/Page.c
> +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
> @@ -1183,6 +1183,13 @@ CoreFindFreePagesI (
>        continue;
> 
>      }
> 
> 
> 
> +    //
> 
> +    // Don't allocate out of Special-Purpose memory.
> 
> +    //
> 
> +    if ((Entry->Attribute & EFI_MEMORY_SP) != 0) {
> 
> +      continue;
> 
> +    }
> 
> +
> 
>      DescStart = Entry->Start;
> 
>      DescEnd   = Entry->End;
> 
> 
> 
> --
> 2.40.1
> 
> 
> 
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