Re: [edk2-devel] [PATCH v4 4/4] StandaloneMmPkg/Core: Fix the failure to find uncompressed inner FV

["Laszlo Ersek" <lersek@redhat.com>]

On 11/6/23 08:52, Xu, Wei6 wrote:
> The MmCoreFfsFindMmDriver only checks for encapsulated compressed FVs.
> When an inner FV is uncompressed, StandaloneMmCore will miss the FV and
> all the MM drivers in the FV will not be dispatched.
> Add checks for uncompressed inner FV to fix this issue.
> 
> Cc: Laszlo Ersek <lersek@redhat.com>
> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
> Cc: Sami Mujawar <sami.mujawar@arm.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Signed-off-by: Wei6 Xu <wei6.xu@intel.com>
> ---
>  StandaloneMmPkg/Core/FwVol.c | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/StandaloneMmPkg/Core/FwVol.c b/StandaloneMmPkg/Core/FwVol.c
> index 4d2b63a448e7..07500cee41f3 100644
> --- a/StandaloneMmPkg/Core/FwVol.c
> +++ b/StandaloneMmPkg/Core/FwVol.c
> @@ -79,6 +79,8 @@ MmCoreFfsFindMmDriver (
>    UINTN                       DepexSize;
>    UINTN                       Index;
>    EFI_COMMON_SECTION_HEADER   *Section;
> +  VOID                        *SectionData;
> +  UINTN                       SectionDataSize;
>    UINT32                      DstBufferSize;
>    VOID                        *ScratchBuffer;
>    UINT32                      ScratchBufferSize;
> @@ -115,6 +117,26 @@ MmCoreFfsFindMmDriver (
>        break;
>      }
>  
> +    //
> +    // Check uncompressed firmware volumes
> +    //
> +    Status = FfsFindSectionData (
> +               EFI_SECTION_FIRMWARE_VOLUME_IMAGE,
> +               FileHeader,
> +               &SectionData,
> +               &SectionDataSize
> +               );
> +    if (!EFI_ERROR (Status)) {
> +      if (SectionDataSize > sizeof (EFI_FIRMWARE_VOLUME_HEADER)) {
> +        InnerFvHeader = (EFI_FIRMWARE_VOLUME_HEADER *)SectionData;
> +        MmCoreFfsFindMmDriver (InnerFvHeader, Depth + 1);
> +        continue;
> +      }
> +    }
> +
> +    //
> +    // Check compressed firmware volumes
> +    //
>      Status = FfsFindSection (
>                 EFI_SECTION_GUID_DEFINED,
>                 FileHeader,

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



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