Another comment:
In your UefiPayloadPkg change, you have an assumption that the option ROM BAR 
still contain the correct base address.
Is it always true in real world? Do you think maybe the boot loader should 
supply a MMIO space range so UeifPayloadPkg
 can use for option rom decoding?

Thanks,
Ray

> -----Original Message-----
> From: [email protected] <[email protected]> On Behalf Of Ni, Ray
> Sent: Wednesday, September 16, 2020 4:29 PM
> To: [email protected]; [email protected]
> Subject: Re: [edk2-devel] [PATCH v2 0/2] Add support for scanning Option ROMs
> 
> Why running it will disable the ability of PciPlatform code to scan for ROMs?
> 
> I guess it is because the PciIoDevice->AllOpRomProcessed is set which causes 
> GetPciRom() is skipped.
> 
> Can you explain more in the code comment?
> 
> > -----Original Message-----
> > From: [email protected] <[email protected]> On Behalf Of Marcello
> > Sylvester Bauer
> > Sent: Tuesday, September 15, 2020 8:26 PM
> > To: [email protected]
> > Subject: [edk2-devel] [PATCH v2 0/2] Add support for scanning Option ROMs
> >
> > Fix Option ROM enumeration and support scanning.
> >
> > v2:
> > * add correct Maintainer and Reviewer to Cc
> > * PciPlatformDxe:
> >   - Update description
> >   - add function description
> >
> > Branch: https://github.com/9elements/edk2-1/tree/UefiPayloadPkg-
> > Option_ROMs
> > PR: https://github.com/tianocore/edk2/pull/926
> >
> > Patrick Rudolph (2):
> >   MdeModulePkg: Fix OptionROM scanning
> >   UefiPayloadPkg: Scan for Option ROMs
> >
> >  UefiPayloadPkg/UefiPayloadPkgIa32.dsc                 |   1 +
> >  UefiPayloadPkg/UefiPayloadPkgIa32X64.dsc              |   1 +
> >  UefiPayloadPkg/UefiPayloadPkg.fdf                     |   1 +
> >  UefiPayloadPkg/PciPlatformDxe/PciPlatformDxe.inf      |  46 +++
> >  UefiPayloadPkg/PciPlatformDxe/PciPlatformDxe.h        |  19 +
> >  MdeModulePkg/Bus/Pci/PciBusDxe/PciEnumeratorSupport.c |  10 +-
> >  UefiPayloadPkg/PciPlatformDxe/PciPlatformDxe.c        | 426
> > ++++++++++++++++++++
> >  7 files changed, 500 insertions(+), 4 deletions(-)
> >  create mode 100644 UefiPayloadPkg/PciPlatformDxe/PciPlatformDxe.inf
> >  create mode 100644 UefiPayloadPkg/PciPlatformDxe/PciPlatformDxe.h
> >  create mode 100644 UefiPayloadPkg/PciPlatformDxe/PciPlatformDxe.c
> >
> > --
> > 2.28.0
> >
> >
> >
> 
> 
> 



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