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

Re: [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@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Rahul Kumar <rahul1.kumar@intel.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky@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);
>  
>    //
> 

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

[Laszlo Ersek]

On 05/10/21 16:24, Lendacky, Thomas 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.
> 
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Rahul Kumar <rahul1.kumar@intel.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky@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);
>  
>    //
> 

Reviewed-by: Laszlo Ersek <lersek@redhat.com>

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

[Laszlo Ersek]

On 05/10/21 21:33, Lendacky, Thomas wrote:
> 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.
> 

Thanks for the note, I'm picking that up.
Laszlo

> Tom
> 
>> Cc: Eric Dong <eric.dong@intel.com>
>> Cc: Ray Ni <ray.ni@intel.com>
>> Cc: Laszlo Ersek <lersek@redhat.com>
>> Cc: Rahul Kumar <rahul1.kumar@intel.com>
>> Signed-off-by: Tom Lendacky <thomas.lendacky@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);
>>  
>>    //
>>
> 
> 
> 
> 
> 

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

[Laszlo Ersek]

On 05/10/21 16:24, Lendacky, Thomas 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.
> 
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Rahul Kumar <rahul1.kumar@intel.com>
> Signed-off-by: Tom Lendacky <thomas.lendacky@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);
>  
>    //
> 

Merged as commit 6933c78e4dc2, via
<https://github.com/tianocore/edk2/pull/1634>.

Thanks
Laszlo