Hi Zhiguang,
This patch just uses an actual FV GUID to replace the dummy FV GUID (all zero FV GUID) and no FV layout change, right?
If so, this change should not impact the coreboot FV parse to find the FV entrypoint.
https://github.com/coreboot/coreboot/blob/master/util/cbfstool/cbfs-mkpayload.c

Thanks,
Guo

From: Ni, Ray <ray.ni@intel.com>
Sent: Tuesday, August 24, 2021 4:45 AM
To: devel@edk2.groups.io; kingsumos@gmail.com; Dong, Guo <guo.dong@intel.com>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com>; Tan, Dun <dun.tan@intel.com>
Subject: RE: [edk2-devel] [PATCH] UefiPayloadPkg: Add FV Guid for DXEFV and PLDFV

It seems like the coreboot cannot support FV that contains GUID in its header.

From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of King Sumo
Sent: Tuesday, August 24, 2021 1:02 AM
To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Dong, Guo <guo.dong@intel.com<mailto:guo.dong@intel.com>>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>
Subject: Re: [edk2-devel] [PATCH] UefiPayloadPkg: Add FV Guid for DXEFV and PLDFV

Hi All,

This patch broke the coreboot payload loading. Tested with:
build -a IA32 -a X64 -p UefiPayloadPkg/UefiPayloadPkg.dsc -b RELEASE -t GCC5 -D BOOTLOADER=COREBOOT

Basically the coreboot cbfstool reports the following error when creating the CBFS / flash image:
"Not a usable UEFI firmware volume"

Trying to boot coreboot results in an exception and the following error message:
"Payload not loaded"

Probably it broke the interface.

commit 4bac086e8e007c7143e33f87bb96238326d1d6ba
Author: Zhiguang Liu <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>
Date:   Wed Jul 14 14:24:45 2021 +0800

    UefiPayloadPkg: Add FV Guid for DXEFV and PLDFV

    Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>
    Reviewed-by: Ray Ni <ray.ni@intel.com<mailto:ray.ni@intel.com>>
    Reviewed-by: Guo Dong <guo.dong@intel.com<mailto:guo.dong@intel.com>>


Kind regards,
Sumo

On Wed, Jul 14, 2021 at 1:08 PM Guo Dong <guo.dong@intel.com<mailto:guo.dong@intel.com>> wrote:

Signed-off-by: Guo Dong <guo.dong@intel.com<mailto:guo.dong@intel.com>>

> -----Original Message-----
> From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of
> Zhiguang Liu
> Sent: Tuesday, July 13, 2021 11:25 PM
> To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>
> Subject: [edk2-devel] [PATCH] UefiPayloadPkg: Add FV Guid for DXEFV and
> PLDFV
>
> Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>
> ---
>  UefiPayloadPkg/UefiPayloadPkg.fdf | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/UefiPayloadPkg/UefiPayloadPkg.fdf
> b/UefiPayloadPkg/UefiPayloadPkg.fdf
> index 2d51fdbacb..041fed842c 100644
> --- a/UefiPayloadPkg/UefiPayloadPkg.fdf
> +++ b/UefiPayloadPkg/UefiPayloadPkg.fdf
> @@ -34,6 +34,7 @@ FV = PLDFV
>
>
>
> ##########################################################
> ######################
>
>  [FV.PLDFV]
>
> +FvNameGuid         = 96E75986-6FDD-491E-9FD5-35E21AC45B45
>
>  BlockSize          = $(FD_BLOCK_SIZE)
>
>  FvAlignment        = 16
>
>  ERASE_POLARITY     = 1
>
> @@ -62,6 +63,7 @@ FILE FV_IMAGE = 4E35FD93-9C72-4c15-8C4B-
> E77F1DB2D793 {
>
> ##########################################################
> ######################
>
>
>
>  [FV.DXEFV]
>
> +FvNameGuid         = 8063C21A-8E58-4576-95CE-089E87975D23
>
>  BlockSize          = $(FD_BLOCK_SIZE)
>
>  FvForceRebase      = FALSE
>
>  FvAlignment        = 16
>
> --
> 2.30.0.windows.2
>
>
>
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