About

The domain context component in OpenSBI provides basic CPU context management routines for existing OpenSBI domain. The context component was initially designed to facilitate the suspension and resumption of domains, enabling secure domains to efficiently share CPU resources, and allowing the UEFI Secure Variable or TEE service to run within it.

Project Scope and Timelines

The reference architecture shown below illustrates the scenario of employing enhanced secure domains to support runtime services, with the opensbi context providing synchronous context switching when a service is called.

• Context switch support for standalonemm
  
• Context switch support for TEE (like OP-TEE)

Components and Repos.

Based on OpenSBI v1.4

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

None,

Measure of Success

Code upstream to OpenSBI

RISE Requirements

None,

Status

Updates

 01 Apr 2024 

Main Patch merged 

https://github.com/riscv-software-src/opensbi/commit/e11025c52d70c8a6042965d5f368ae9d14bd80d6

Two hot fixes from Andes under review

https://patchwork.ozlabs.org/project/opensbi/patch/20240328033303.883674-2-peterlin@andestech.com/

https://patchwork.ozlabs.org/project/opensbi/patch/20240328033303.883674-3-peterlin@andestech.com/

Updates

 06 Mar 2024 

v4 patch in review, also verified patch in Andes's OPTEE PoC

https://patchwork.ozlabs.org/project/opensbi/patch/b0e8ae4bbf4b44872da58d357d9362cdb70c89f3.1709723680.git.2931013282@sjtu.edu.cn/

20 Feb 2024 

Verified the patch can work with OP-TEE

https://github.com/yli147/opensbi/tree/dev-rpxy-optee-v3

https://github.com/yli147/optee_os/tree/dev-rpxy-optee-v3

https://github.com/yli147/linux/tree/dev-rpxy-optee-v3

https://github.com/yli147/test_optee/tree/dev-rpxy-optee-v3