Messages in this thread | | | Date | Thu, 10 Mar 2016 13:27:28 +0530 | From | Amit Shah <> | Subject | Re: [RFC qemu 0/4] A PV solution for live migration optimization |
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On (Thu) 10 Mar 2016 [07:44:19], Li, Liang Z wrote: > > Hi Amit, > > Could provide more information on how to use virtio-serial to exchange data? Thread , Wiki or code are all OK. > I have not find some useful information yet.
See this commit in the Linux sources:
108fc82596e3b66b819df9d28c1ebbc9ab5de14c
that adds a way to send guest trace data over to the host. I think that's the most relevant to your use-case. However, you'll have to add an in-kernel user of virtio-serial (like the virtio-console code -- the code that deals with tty and hvc currently). There's no other non-tty user right now, and this is the right kind of use-case to add one for!
For many other (userspace) use-cases, see the qemu-guest-agent in the qemu sources.
The API is documented in the wiki:
http://www.linux-kvm.org/page/Virtio-serial_API
and the feature pages have some information that may help as well:
https://fedoraproject.org/wiki/Features/VirtioSerial
There are some links in here too:
http://log.amitshah.net/2010/09/communication-between-guests-and-hosts/
Hope this helps.
Amit
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