Summary of Month

hvac-demo updates:
- Stretch: Rebase demo-amp-dual-linux to LKML RFC v1. Moved to October
- Stretch: Rebase all demos to use Yocto base images to improve boot speed, Deferred
- Move AMD demo to single x86 + Arm board (Sapphire Edge+ VPR-5050A)

Two presentations of virtio-msg at the Xen Summit: Trap-Free Virtio for Xen and Virtio across Xen domain in mixed-architecture SoCs
Moved the AMD x86 + Arm demo to the single board VPR-5050A

Bill, Bertrand, and Edgar were out 1 week (September 15 to 19) for the Xen Summit

Meeting September 11

Xen Summit next week: Bertrand & Edgar
KVM Forum: Alex talked to Mathies (RedHat) and Alex Graf (AWS)
AWS Secure VM that has no devices other than a PCI w/ virtio-vsock
Alex: MST a new version is a lot of work so no specific timeline for a v1.4 release
Armelle: Talked to a Si vendor and they are interested in this work
Spec Changes from Edgar:
Remove length from config and features in favor of length in header: Agreed
Specify that Responses return in order to Requests for the same device.
OR specify that only one requests to a single device an be outstanding
OR completely handle out of order responses

Xen summit last week, Presentations from Bertrand and Edgar
TODO Slides from xen summit
Xen specific bus implementation: use grants & events
Problem: startup & config / discovery, One solution was to use Argo (xen hypervisor resident msg passing). Argo is adding a port 0 discovery method. Need to add a domu discovery method also.
Also: xsm configuration could be made dynamic??
Also: xen-store possible as well but want a solution that works w/o Dom0 or store stubdom
One company wants to use RPMsg on Xen Linux to Zephyr. Interesting demo possible here
Discussion of what Argo could add to virtio-msg for Xen
Suggestion: do DT first, let x86 figure out hyper-launch
Edgar: AMP on 5050A, Kris is doing Yocto for both sides
Edgar: clean QEMU RFC for QEMU w/ PCI card w/ virtio-msg-amp (name is demo-amp-qemu-pci in hvac-demo)
Edgar: virtio-media: patches are now in virtio spec (v1.4 branch). Only known back-end is in Rust today
Alex: virtio-video may go in the spec also
virtio-camera will probably not make progress until someone drives hard
Alex: looked at the list
Message Order v2: add 32 bit transaction ID in common header. Does not need to be used in driver side will not send multiple messages.
Arnaud: Mailbox subsystem has same issue, may want to look at it
Alex: trixie (Debian 13) broke the laytex build, fixed via bookworm (12) container. Alex will look at fixing for trixie.