lkml.org 
[lkml]   [2016]   [Mar]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC qemu 0/4] A PV solution for live migration optimization
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

\
 
 \ /
  Last update: 2016-03-10 09:21    [W:0.239 / U:0.200 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site