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WW49
wjliang edited this page Dec 7, 2018
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- Participants:
- Bjorn Andersson – Linaro
- Etsam Anjum – Mentor
- Arnaud Pouliquen – ST
- Bill Mills – TI
- Marc Grosen – TI
- Felix Rubinstein – Xilinx
- Tomas Evensen – Xilinx
- Stefano Stabellini – Xilinx
- Jiaying (Wendy) Liang – Xilinx
- Sergei Korneichuk – Xilinx
Wendy (Xilinx)
- Latest master Linux kernel didn't provide the da of vring until vring is allocated which is after booting the remote, OpenAMP remoteproc virtio doesn't work with it.
- OpenAMP will change not to consume the virtio config information until virtio driver ok bit is set by the master.
- Other firmware can make the same assumption based on the previous Linux kernel implementation assuming that the da of vring is set when the remote boots.
- when to use the virtio config information from vdev in resource table is not written down. Etsam suggested to write down the protocol on how to setup communication.
- offline discussion in the kernel mailing list to talk about how to fix existing kernel to make it backward compatible
- More than one attendees suggested to have Kernel CI to also verify remoteproc patches with OpenAMP
- Work in progress
- Catching up on patches and discussions to move forward
- Presented: Open Firmware introduction.
- Open firmware is an open source framework for audio. It has requirement to have a common IPC framework in the stack
- Pinecone implement the common IPC with OpenAMP, and they are using it in their SoCs. They have developed services on top of RPMsg as following: RPMsg TTY, RPMsg HostFS, RPMsg CLK