About

This project aims to implement and upstream the MM service group based on MPXY SBI extension in OpenSBI.  This project helps the PoC project EDK2_00_02 - StandaloneMmPkg (PoC) and let it use the spec defined SBI interface.

Project Scope and Timelines

The MM service group implementation includes.

• Leverage the SBI MPXY extension, which carries the RPMI message

• Put MM inter-doman messaging payload in shared memory

• Add an MM Service in RPMI with APIs:

  • MM_VERSION

  • MM_COMMUNICATE

  • MM_COMPLETE

Open

Components and Repos.

Based on RPMI PoC

^{OpenSBI : https://github.com/ventanamicro/opensbi/tree/dev-upstream Qemu : https://github.com/ventanamicro/qemu/tree/dev-upstream Linux : https://github.com/ventanamicro/linux/tree/dev-upstream edk2 : https://github.com/ventanamicro/edk2/tree/dev-upstream edk2-platform : https://github.com/ventanamicro/edk2-platforms/tree/dev-upstream}

The latest code for this Project

^{OpenSBI : https://github.com/yli147/opensbi/tree/dev-standalonemm-mpxy-v3}

Stakeholders and Partners

• RISE

  • Intel: Yong Li <yong.li@intel.com>

• External

  • IPADS: Erhu Feng, Qingyu Shang

  • StarFive: Cheehong Ang <cheehong.ang@starfivetech.com>,John Chew <yuinyee.chew@starfivetech.com>

Dependencies

Here are the links to the draft specifications for RPMI and MPXY which were shared in the past on the riscv org mailing list for review.
RPMI: https://github.com/riscv-non-isa/riscv-rpmi
MPXY: https://lists.riscv.org/g/tech-prs/message/948

Measure of Success

Code upstream to OpenSBI

RISE Requirements

None,

Status

Updates

Jul 11, 2024 

Rebased with the latest MPXY & RPMI PoC

https://github.com/yli147/opensbi/tree/dev-standalonemm-mpxy-v3

Apr 1, 2024 

RPXY driver for StandaloneMm, which is based on the latest RPXY and RPMI spec.

https://github.com/ventanamicro/opensbi/pull/1

Need rebase on MPXY implementation once MPXY is ready

Mar 6, 2024 

Pending on https://lf-rise.atlassian.net/wiki/display/HOME/SBI_00_04+-+Domain+Context+Switch+Support 

Once the patch has been upstreamed, will do the code rebase for this OpenSBI RPMI MM Support