Re: [edk2-devel] [PATCH v6 3/7] MdeModulePkg/PciBusDxe: dispatch option ROMs for foreign architectures

["Ard Biesheuvel" <ard.biesheuvel@linaro.org>]

On Mon, 15 Apr 2019 at 23:02, Gary Lin <glin@suse.com> wrote:
>
> On Sun, Apr 14, 2019 at 12:52:29PM -0700, Ard Biesheuvel wrote:
> > Delete the explicit machine type check for option ROM images, and instead,
> > rely on the LoadImage() boot service to decide whether an option ROM can
> > be dispatched or not. This permits platforms to ship with emulators to
> > execute option ROMs that are not native to the processor architecture.
> >
> After applying this patch, my OVMF VM failed to boot if e1000 or iPXE
> were enabled. It failed with the following message:
>
> Loading driver at 0x0007E537000 EntryPoint=0x0007E53C06D 8086100e.efi
> InstallProtocolInterface: BC62157E-3E33-4FEC-9920-2D3B36D750DF 7F003B98
> ProtectUefiImageCommon - 0x7F002BC0
>   - 0x000000007E537000 - 0x000000000009F900
> Image type IA32 can't be started on X64 UEFI system.
> ASSERT MdeModulePkg/Core/Dxe/Mem/Pool.c(698): Head->Signature == ((('p') | ('h' << 8)) | ((('d') | ('0' << 8)) << 16)) || Head->Signature == ((('p') | ('h' << 8)) | ((('d') | ('1' << 8)) << 16))
>
> It seems OVMF was trying to load the IA32 driver and failed.
>

Thanks Gary, I am looking into this.

It should fail gracefully after failing to start the image, but
perhaps we should not attempt to start cross-type images in the first
place (which is closer to the previous situation)

-- 
Ard.