Summary of Month

Plans

• Work toward the 2nd spec RFC, address all open spec issues

• Demo x86 + Arm virtio-net over PCIe at Embedded World

• Build X86 + Arm demo SW from hvac-demos

• Build and run the ST A7 Linux + M4 Zephyr virtio-i2c demo on ST HW

• Define and share AMP data structures w/ “simple layout” description

• Stretch: Rebase the Dual QEMU demo to the latest baseline and contain the shared memory usage to only the single IVISHMEM card

• Stretch: Build the ST HW demo from the hvac-demo repo

• Stretch: Port the ST demo to a QEMU based platform, likely one of:

  • zynqmp A53+R5

  • QEMU m3 w/ ivshmem-flat and QEMU A53 w/ ivshmem

Highlights

• Demoed x86 + Arm virtio-net over PCIe on AMD hardware at Embedded World

• Progress on the virtio-msg spec toward an RFCv2

• Progress toward building the AMD hardware from hvac-demo repo, but it is not done yet.

Issues

• Bill will be out 1 week for Embedded World

Meeting March 13

• No meeting as Bill was at Embedded World

Meeting Notes March 27

• Viresh:

  • New work: get notifications for each virt-queue.

  • blocked today on pKVM for memory mapping (see email thread on pKVM on list). This relates to memory sharing Guest to Trusty w/o host being able to see.

  • VSOCK from Linux to Trusty, tested by google

  • Viresh tested himself Host to Trusty, low level setup & memory sharing

  • Bill asked Viresh to sync his Xen VM to VM demo to the current spec

  • Bertrand said to wait until next week so we can land the below changes

  • Spec sync, things to look at: message numbers, messages are not variable size (but fixed per bus instance) error message,

• Common Data structures:

  • Goal is to use for AMP but also for:

    • FFA when not using FFA message APIs (using shared memory and notifications)

    • Xen native (shared memory and Xen events)

  • Bill pseudo header: hvac-demo/notes/amp-data-structures.h at wip-amp-data-defs · wmamills/hvac-demo

  • Arnuads:

    • open-amp/lib/utils/amp-static-queue.c at virtio-msg · arnopo/open-amp

    • open-amp/lib/include/openamp/amp_static_queue.h at virtio-msg · arnopo/open-amp

• Version numbers

  • Do what IBM channel transport does

  • We don’t want version per device

  • Version at bus level makes sense

  • Bus tells device level the protocol version and max message size when it creates the device instance

• Error numbers

  • We should align to the error defs defined for Admin Queues

  • Leave moving or renaming these defs for upstream alignment

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