[edk2-devel] [PATCH] UefiPayloadPkg/UefiPayloadEntry: Remove 4GB memory WA

[Ma, Maurice]

Reviewed-by:  Maurice Ma <maurice.ma at intel.com>

Regards
Maurice

> -----Original Message-----
> From: Dong, Guo <guo.dong at intel.com>
> Sent: Sunday, February 14, 2021 21:13
> To: devel at edk2.groups.io
> Cc: Ma, Maurice <maurice.ma at intel.com>; You, Benjamin
> <benjamin.you at intel.com>
> Subject: [edk2-devel] [PATCH] UefiPayloadPkg/UefiPayloadEntry: Remove
> 4GB memory WA
> 
> Previous it would hang in CpuDxe if DXE drivers are dispatched above 4GB.
> Now remove the work around since the fixed in CpuDxe are merged.
> 
> Signed-off-by: Guo Dong <guo.dong at intel.com>
> ---
>  UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> index 805f5448d9..c403b0a80a 100644
> --- a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> +++ b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> @@ -40,11 +40,6 @@ MemInfoCallback (
>               EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
>               EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE;
> 
> -  if (Base >= BASE_4GB ) {
> -    // Remove tested attribute to avoid DXE core to dispatch driver to
> memory above 4GB
> -    Attribue &= ~EFI_RESOURCE_ATTRIBUTE_TESTED;
> -  }
> -
>    BuildResourceDescriptorHob (Type, Attribue,
> (EFI_PHYSICAL_ADDRESS)Base, Size);
>    DEBUG ((DEBUG_INFO , "buildhob: base = 0x%lx, size = 0x%lx, type =
> 0x%x\n", Base, Size, Type));
> 
> --
> 2.16.2.windows.1



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