Re: [edk2-devel] [Patch 1/1] MdeModulePkg/Bus/Pci/PciBusDxe: Support platform PCI ROM override

["Ard Biesheuvel" <ardb@kernel.org>]

On Sat, 22 Jan 2022 at 02:41, Michael D Kinney
<michael.d.kinney@intel.com> wrote:
>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3811
>
> Remove ASSERT() statements that are triggered if a platform provides
> an override of PCI ROM attached to a PCI Controller.  The PCI Platform
> Protocol allows the platform to provide a PCI ROM image for a PCI
> Controller.  This works for PCI Controllers that do not have an attached
> PCI ROM, but the platform is not allowed to replace the PCI ROM for a
> PCI Controller that has its own PCI ROM.  Removing these ASSERT()
> statements enables this additional use case.
>
> Cc: Hao A Wu <hao.a.wu@intel.com>
> Cc: Ray Ni <ray.ni@intel.com>
> Cc: Star Zeng <star.zeng@intel.com>
> Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>

Acked-by: Ard Biesheuvel <ardb@kernel.org>

> ---
>  MdeModulePkg/Bus/Pci/PciBusDxe/PciRomTable.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/MdeModulePkg/Bus/Pci/PciBusDxe/PciRomTable.c b/MdeModulePkg/Bus/Pci/PciBusDxe/PciRomTable.c
> index 5535bd3013b8..cb845ec2b186 100644
> --- a/MdeModulePkg/Bus/Pci/PciBusDxe/PciRomTable.c
> +++ b/MdeModulePkg/Bus/Pci/PciBusDxe/PciRomTable.c
> @@ -58,10 +58,9 @@ PciRomAddImageMapping (
>      {
>        //
>        // Expect once RomImage and RomSize are recorded, they will be passed in
> -      // later when updating ImageHandle
> +      // later when updating ImageHandle. They may also be updated with new
> +      // values if the platform provides an override of RomImage and RomSize.
>        //
> -      ASSERT ((mRomImageTable[Index].RomImage == NULL) || (RomImage == mRomImageTable[Index].RomImage));
> -      ASSERT ((mRomImageTable[Index].RomSize  == 0) || (RomSize  == mRomImageTable[Index].RomSize));
>        break;
>      }
>    }
> --
> 2.32.0.windows.1
>
>
>
> 
>
>