Re: [edk2-devel] [PATCH V2 1/1] UefiPayloadPkg: Remove PEI phase from Payload

["Guo Dong" <guo.dong@intel.com>]

Hi Patrick,
I don't think TCG PEI modules could be used as a library for BlSupportDxe.
Since measured boot and verified boot are important and wide used in EDKII, 
I also plan to enable them as advanced features in UEFI payload.

Thanks,
Guo

> -----Original Message-----
> From: Patrick Rudolph <patrick.rudolph@9elements.com>
> Sent: Thursday, January 28, 2021 12:40 AM
> To: Dong, Guo <guo.dong@intel.com>
> Cc: You, Benjamin <benjamin.you@intel.com>; Ma, Maurice
> <maurice.ma@intel.com>; devel@edk2.groups.io
> Subject: Re: [edk2-devel] [PATCH V2 1/1] UefiPayloadPkg: Remove PEI phase
> from Payload
> 
> Hi,
> Modifying the bootloader and defining an interface could take a while
> and requires to add code that's already present in EDK2.
> Would it be possible to move the Tcg*Pei code to a Library, so that it
> could be directly used by BlSupportDxe in order to set the PCDs?
> 
> Kind Regards,
> Patrick Rudolph
> 
> On Wed, Jan 27, 2021 at 5:10 PM Dong, Guo <guo.dong@intel.com> wrote:
> >
> >
> > Hi Patrick,
> > Bootloader (coreboot or Slim Bootloader) is similar with EDKII PEI, so
> measured boot should
> > work without PEI phase in UEFI payload.
> > In general, bootloader need pass required information to UEFI payload.
> > BlSupportDxe could get these information and set required PCDs.
> >
> > We need well define the interface with bootloader on how to support
> measured boot,
> > Also including measured boot enable/disable, TPM log event, etc.
> >
> > Thanks,
> > Guo
> >  > -----Original Message-----
> >  > From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Patrick
> >  > Rudolph
> >  > Sent: Tuesday, January 26, 2021 8:21
> >  > To: Dong, Guo <guo.dong@intel.com>
> >  > Cc: You, Benjamin <benjamin.you@intel.com>; devel@edk2.groups.io; Ma,
> >  > Maurice <maurice.ma@intel.com>
> >  > Subject: Re: [edk2-devel] [PATCH V2 1/1] UefiPayloadPkg: Remove PEI
> phase
> >  > from Payload
> >  >
> >  > Hi,
> >  > I'm trying to rebase my TPM support patches for UefiPayloadPkg on top of
> >  > master.
> >  >
> >  > The Tcg*Dxe needs the following PCDs set by their Tcg*Pei counterparts:
> >  > * PcdTpm2HashMask
> >  > * PcdTcg2HashAlgorithmBitmap
> >  > * PcdTpmInstanceGuid
> >  >
> >  > As there's no PEI stage any more, how do you plan to support TPMs in
> >  > UefiPayloadPkg?
> >  >
> >  > Kind Regards,
> >  > Patrick Rudolph
> >