About

The IOPMP is a hardware checker located in a bus fabric. It has the ability to check each transaction passing through it on the fly. It is an essential component used to create isolation spaces for trusted execution environments by controlling transactions initiated, especially by I/O agents. This project will help programmers of secure systems using the QEMU emulation as an alternative before their hardware supports IOPMP.
The IOPMP spec v1v0.09.0-draft41: https://github.com/riscv-non-isa/iopmp-spec/blobreleases/main/riscv_iopmp_specification.pdftag/v0.9.1

Project Scope and Timelines

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• IOPMP device which checks the permission of memory acces with source id (SIDrequest-role-ID (RRID).

Change to hw/riscv/virt.c around:

• Addition of "iopmp" and " iopmp_cascade" machine option.
• When "iopmp" option is enabled:
  • Addition IOPMP device
  • The devices on the generic PCIe host bridge connect to the IOPMP device
  When "iopmp_cascade" option is enabled
  • Addition IOPMP2 device which is connected after IOPMP device.

Components and Repos

Current verison(v6) patch
https://lore.kernel.org/qemu-devel/20240207093444.249112-1-ethan84@andestech.com/

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