[edk2-devel] [PATCH] UefiCpuPkg/MpInitLib: Properly cast from PCD to SEV-ES jump table pointer

[Lendacky, Thomas]

On 5/10/21 9:24 AM, Lendacky, Thomas via groups.io wrote:
> BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3385
> 
> A VS2012 build fails with a cast conversion warning when the SEV-ES work
> area PCD is cast as a pointer to the SEV_ES_AP_JMP_FAR type.
> 
> When casting from a PCD value to a pointer, the cast should first be done
> to a UINTN and then to the pointer. Update the code to perform a cast to
> a UINTN before casting to a pointer to the SEV_ES_AP_JMP_FAR type.
> 

I should have included a Fixes: 7b7508ad784d16a5208c8d12dff43aef6df0835b tag.

Tom

> Cc: Eric Dong <eric.dong at intel.com>
> Cc: Ray Ni <ray.ni at intel.com>
> Cc: Laszlo Ersek <lersek at redhat.com>
> Cc: Rahul Kumar <rahul1.kumar at intel.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
> ---
>  UefiCpuPkg/Library/MpInitLib/MpLib.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> index 3d945972a025..dc2a54aa31e8 100644
> --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
> +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
> @@ -1265,7 +1265,7 @@ SetSevEsJumpTable (
>    UINT32            Offset, InsnByte;
>    UINT8             LoNib, HiNib;
>  
> -  JmpFar = (SEV_ES_AP_JMP_FAR *) FixedPcdGet32 (PcdSevEsWorkAreaBase);
> +  JmpFar = (SEV_ES_AP_JMP_FAR *) (UINTN) FixedPcdGet32 (PcdSevEsWorkAreaBase);
>    ASSERT (JmpFar != NULL);
>  
>    //
> 


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