2022-11-11 Project Stratos Meeting notes

Date

Nov 11, 2022

CC/AJB: Had a chat about the various aspects of memory sharing
- Could [PATCH v9 1/8] mm: Introduce memfd_restricted system call to create restricted user memory - Chao Peng
  - can it be generalized to provide access to Xen grant and CCA memory?
SS: 3 key areas to left
- VirtIO with QEMU
  - need a smaller QEMU with just Xen and VirtIO at 50Kb instead of 20Mb
  - AJB: hopefully the single binary will help with that
- Unprivileged VirtIO (i.e. limited memory view)
  - this is where QNX wins because it’s almost impossible to safety certify a Linux Dom0 vs QNX’s privileged micro-kernel model
  - multiple ways on doing this. Could Argo play a role
- VM to VM comms
  - VirtIO is too complex and still not safety certifiable
  - Lack of hypervisor in OpenAMP could be a problem for Argo
  - AJB: should bring CC in next time we talk to @Bill Mills re OpenAMP