Summary of Month

Plans

• Prototype a kernel level driver for ivshmem that can exchange messages with QEMU’s virtio-msg-ivshmem mode

Highlights

Highlights

• The first version kernel driver for virtio-msg-amp has been created and is active in the hvac-demo project as demo4. It has been shown to be functional with virtio-net and virtio-rng.

• hvac-demo v0.4 has been released that includes a demo for the driver above

• QEMU to QEMU (virtio-msg-proxy) is working internal to AMD on real hardware

Issues/Changes

WIP Presentations

(none yet this monthIntro slides on front page of project were updated)

Meeting notes October 10th

• Follow up on mailing list virtio-msg@lists.linaro.org

  • subscribe here

  • Any issues?

• Making the working spec available to all

  • Bertrand has published host first darft of the markdown format to the list

  • Can we host this markdown format in git somewhere? (w/ images etc)

  • Can we publish a snapshot of the PDF on the HVAC home page util another form is ready?

• Updates from Bill

• Updates from Edgar?

• Updates from Lei?

• Updates from others?

...

• Notice: no meeting on Nov 7th

• Updates from Bill

  • I have a kernel that can send a GET_STATUS msg to Edgar’s QEMU on another machine and receive the response.

  • Image Added

  • Next steps: deferred RX processing and hooking to Viresh’s virtio-msg common code

  • Note: this code is ugly and prototype quality, Edgar and I need to agree on common shared memory format that will remove hard-coded values

  • Corresponding system level code is here. Each of these branches (kernel and demo) will be rebased as I go along.

  • Note: This will be the first time we interoperate between Authors. So far we have tested Edgar to Edgar and Viresh to Viresh

• Updates from Edgar?

• Updates from Lei?

• Updates from Viresh:

  • Updated ffa driver Lei started, added memory sharing interface

  • Starting work on the interface to FFA DMA hal, tring to make it generic

  • Lorenzo may have some patches to integrate FFA indirect message support in the kernel

  • Starting to work with Bertrand’s Xen work which should allow to do any DOM to any DOM (including DOMU to DOMU)

  • No API for getting FFA messages to user space (needed on device side)

  • Need to discuss in Dublin

  • Discuss meeting timings, its getting very late for India (22:30 IST) from Nov, possible to move it two hours earlier ?

• Updates from Armelle

  • Virtio-msg and OPTEE? Joakim/Sumit: need to discuss in Dublin

  • OPTEE as VM

    • Keep SOC vendor in real TZ

    • Allow SW provider to use OPTEE in a pKVM VM

    • [Joakim, Something about secure timer → Armelle uses protected storage for this, timer only needs slow update (10s)]

    • HW Crypto keeps track of key expiration

  • Does OPTEE support TA’s in Rust, Joakim: yes the basics are there. As you use it for real work, more may be needed

• Updates from others?

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