Summary of Month

Highlights

• Held a sprint between AMD, Arm, and Linaro the first week of November

• An initial implementation of virtio-msg via FFA for Xen DOMU to Xen DOM0

• AMD has used the Linaro kernel prototypes on real HW for X86 + ARM via PCIe

Issues/Changes

• 1 week of conference and 1 week of vacation limited the amount of work in November

WIP Presentations

(Intro slides on front page of project were updated)

Meeting notes November 7

• No meeting due to conflict with Linaro employee meetings

Meeting notes November 21

• Updates from Bill

  • Any update on the notes from the Sprint?: WIP Document is here

• Updates from Edgar?

  • Setup Dom0 on x86 w/ virtio-msg in kernel connecting ARM

  • Device side on Arm w/o Xen

  • Mostly working but loosing some interrupts are lost Versal to X86

  • Performance ~= 100MB Ethernet right now

  • Versal is mapping X86 memory as normal memory non-cached

  • Should work with Domu if versal PCI device is assigned to DomU

  • Will send an email w/ code pointers today or tomorrow

  • Versal side QEMU is using uio for shared memory and RX irq (send IRQ is devmem)

• Updates from Lei?

• Updates from Viresh?

  • Using Bertrahm Xen patches

  • Using patches for

  • Single QEMU system level w/ Xen

  • DOM0 backend in Rust for VSOCK

  • DomU kernel is using

  • /dev/virtio read & write messages (all messages including bus messages)

  • Bertrand: bus level messages should be processed in kernel

• Alex

  • has setup a fork of the virtio spec on Linaro github w/ automated rendering

  • GitHub - Linaro/virtio-msg-spec: Development of virtio-msg transport spec for submission to the OASIS VIRTIO (Virtual I/O) Specification

• Updates from Armelle

  • Trusty is FFA compliant

  • Including Viresh work

  • Were missing UUID support but fixing that now and hope to enumerate devices

  • All new code in Trusty is Rust

  • Testing with Host not Guest VM

• Arnaud

  • focused on co-processor

  • First working on kernel side, with Devicetree driven flow

  • Commits · arnopo/linux

  • Single message at a time in flat memory

  • No Zephyr code yet: maybe next week

  • Scaleable enumeration? : DT fragments but we don’t know the status

• Updates from others?

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