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stakeholders. Regards, Kun From: Kun Qin Sent: Wednesday, August 7, 2024 11:15 AM To: devel@edk2.groups.io Subject: Proposing v3 of MM communicate buffer Hi all, I am trying to propose a change into PI spec and would like to gather some = feedback in this forum. Essentially, the current communicate header contains a UINTN field in place= , which is causing programing errors when trying to communicate the message between different operation m= ode (i.e. PEI in IA32 communicate into MM in x64). There are various implementations at large to = compensate for this size discrepancy through the edk2 codebase, thus fixing the existing commun= icate buffer definition will be less feasible. Thus I think proposing a new structure and implement= the corresponding header parser will be a simpler approach, which also allows a bit more flexibility= to inject new features/checks into the communication channel. The proposed change for the spec is detailed here: https://github.com/kuqin12/edk2/blob/BZ3398-MmCommunicate-Length-v4/CodeFir= st/BZ3430-SpecChange.md And the code first change is listed here: https://github.com/kuqin12/edk2/blob/BZ3398-MmCommunicate-Length-v4/ Could you please provide me with any feedback that you think might be helpf= ul for future usage of MM communicate? Any input is appreciated. Regards, Kun -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#120287): https://edk2.groups.io/g/devel/message/120287 Mute This Topic: https://groups.io/mt/107775882/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- --_000_BL1PR21MB3160992B19CE9BB2656560CDE9B82BL1PR21MB3160namp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Adding stakeholders.

 

Regards,

Kun

 

From: Kun Qin
Sent: Wednesday, August 7, 2024 11:15 AM
To: devel@edk2.groups.io
Subject: Proposing v3 of MM communicate buffer

 

Hi all,

 

I am trying to propose a change into PI spec and wo= uld like to gather some feedback in this forum.

 

Essentially, the current communicate header contain= s a UINTN field in place, which is causing programing

errors when trying to communicate the message betwe= en different operation mode (i.e. PEI in IA32

communicate into MM in x64). There are various impl= ementations at large to compensate for this

size discrepancy through the edk2 codebase, thus fi= xing the existing communicate buffer definition

will be less feasible. Thus I think proposing a new= structure and implement the corresponding header

parser will be a simpler approach, which also allow= s a bit more flexibility to inject new features/checks

into the communication channel.

 

The proposed change for the spec is detailed here:<= o:p>

https://github.= com/kuqin12/edk2/blob/BZ3398-MmCommunicate-Length-v4/CodeFirst/BZ3430-SpecC= hange.md

 

And the code first change is listed here:
https://github.com/kuqin12/edk2/blob/BZ3398-MmCommunicate-Length-v4/<= /a>

 

Could you please provide me with any feedback that = you think might be helpful for future usage of MM

communicate? Any input is appreciated.

 

Regards,

Kun

 

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