Hi,

Great work Jens & Viresh!

I have added a wiki page that captures Jens' and Viresh's instructions.

https://linaro.atlassian.net/wiki/spaces/HVAC/pages/30372528129/2025-11+OPTE...

Bill

On 10/31/25 7:02 AM, Viresh Kumar wrote:

Hello,

I was able to successfully test memory sharing over Vsock, implemented over a virtio message FFA transport. The memory is shared, as an FD, from Linux userspace (via a FFA specific DMA HEAP) and is received in OP-TEE as a buffer, which prints the string written by Linux.

Steps to reproduce:

• Jens shared an OP-TEE based setup few days back [1]. Reproduce it first.

• Migrate to my branches for the following repositories within that:

  • build, optee_os, optee_test
  • Path to my repos: git@github.com:vireshk/
  • branch: vsock/shmem

• Migrate to my linux repo: git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git virtio/msg

• Repeat the same test from Jens's setup: "xtest 2005"

• The firmware side will print:

  Hello from shared memory via FD!

  This string was written by the Linux userspace in the memory provided by FFA DMA HEAP.

Thanks.

-- viresh

[1] https://linaro.atlassian.net/browse/LEDGE-725 _______________________________________________ Virtio-msg mailing list -- virtio-msg@lists.linaro.org To unsubscribe send an email to virtio-msg-leave@lists.linaro.org