help understanding virtio

[a.curtis]

Hello,

Could someone point me to some documentation that describes how to use the Virtio features? I am particularly interested in file system and network IO.

Was the "Proxy" example removed for STDIO redirection from the slave?

Thanks

Allen

[Jiaying Liang]

HI Allen,

 

You can have a look at : http://www.linux-kvm.org/page/Virtio for virtio.

 

At the moment, in the OpenAMP repo, it only implements virtio ring.

You are welcomed to contribute to add other virtio device support in OpenAMP.

You can have a look at the source code of the Linux kernel driver implementation: in the linux kernel source drivers/virtio.

 

The “proxy” example shows stdio redirection from slave and also the slave can access files on the master’s file system.

 

Best Regards,

Wendy

 

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[a.curtis]

 

You can have a look at : http://www.linux-kvm.org/page/Virtio for virtio.

 

At the moment, in the OpenAMP repo, it only implements virtio ring.

You are welcomed to contribute to add other virtio device support in OpenAMP.

You can have a look at the source code of the Linux kernel driver implementation: in the linux kernel source drivers/virtio.

 

I guess I may have to do that! What do I need to do to contribute?

Does this mean that the Proxy demo is using a generic virtio ring buffer? 

 

The “proxy” example shows stdio redirection from slave and also the slave can access files on the master’s file system.

I am currently using XSDK v2015.4 and PetaLinux v2015.4. The OpenAMP in that release doesn't look anything like this implementation. For instance the current proxy sample application is called rpc_demo.c 

Should I upgrade to v2016.0 of these tools?

Is is possible to upgrade v2015.4 to use the current OpenAMP?

Where is the FreeRTOS support for this version of OpenAMP? Is there another repository for this?

Thanks!

[tcmi...@gmail.com]

https://github.com/tcmichals/FreeRTOS-Neo

(Linux size, creates 3 channels, (1) serial, (2) clear message, (3) for Ethernet)

This should work for standard linux; the idea behind TCP/IP over rpmsg is to leverage existing applications on Linux FTP/TFTP. Multiple apps can create multiple rpmsg endpts or creating a protocol to use single endpt.

https://github.com/tcmichals/rpmsg-neo