Re: runqemu qemux86

Jim Abernathy

On Tue, May 22, 2012 at 1:04 PM, Scott Garman <scott.a.garman@...> wrote:
On 05/22/2012 08:15 AM, James Abernathy wrote:

On Tue, May 22, 2012 at 10:45 AM, Autif Khan <autif.mlist@...
<mailto:autif.mlist@...>> wrote:

   On Tue, May 22, 2012 at 7:43 AM, jfabernathy <jfabernathy@...
   <mailto:jfabernathy@...>> wrote:
    > when testing an image using runqemu qemux86, can you get
   networking to
    > work?? mine comes up disabled.  I want to test an application
   that requires
    > Internet access.

   Yes, I am able to get networking to work out of the box (bitbake
   core-image-sato, etc.) Internetworking does not work out of the box.

   This is accomplished over tun/tap devices - I do not know much about
   these virtual networking devices - they have never failed for me :-)

   The IP address of the emulated machine is - The IP address
   of host machine is

   You can not (out of the box) communicate with machines other than the
   host machine - so that would included internet etc.

   So, if you have an ssh server or a web-server running on the host
   machine - you can ssh to the host machine or browse a webpage using
   the browser. Alternatively, you can run a proxy server on the build
   machine and use it to get to the internet.

   You can run ifconfig to see if the network is configured properly on
   the emulated machine in the terminal. It should show - if
   you do not see this - you do not have networking working.

I can see the tap0 interface on my host at by using ifconfig.
I can also see the eth0 on the qemu machine at
However, my host has an ip of with a AP gateway at
Somehow I need to connect the networks and I'm not sure exactly how to
do that so that DNS servers get used and the traffic all flows.
Jim A

There is some sort of routing or IP forwarding bug in the sato images that is due to be fixed soon. One thing I've found is you can actually get out to the internet for about 30 seconds or so immediately after the image boots. My suspicion is that some conman script is killing the route after boot. core-image-minimal works consistently, and since minimal doesn't use conman, I'm guessing that is the culprit.

So if I read this right,  I don't need any route or bridge commands to make this work. If the bug gets fixed runqemu qemux86 should setup the environment correctly so the web-webkit should get out to the internet via the host machine connection?
Scott Garman
Embedded Linux Engineer - Yocto Project
Intel Open Source Technology Center
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