Re: [Xen-users] ARM: Xen on Vexpress

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2014-06-26 at 14:07 +0100, Jeenu Viswambharan wrote:
> On Tue, Jun 24, 2014 at 17:06:17, Ian Campbell wrote:
> > On Tue, 2014-06-24 at 17:00 +0100, Jeenu Viswambharan wrote:
> > > On Mon, Jun 23, 2014 at 17:19:48, Stefano Stabellini wrote:
> > > > On Mon, 23 Jun 2014, Jeenu Viswambharan wrote:
> > > > > A quick grep under the tools directory showed that it's because
> > > > > libxc failed to open /proc/xen/privcmd. The file seems missing
> > > > > in the proc tree but I don't see any messages of failure (say,
> > > > > about registering the file). Any idea what's going wrong?
> > > >
> > > > You need to execute /etc/init.d/xencommons start
> > >
> > > Hm OK, but more troubles:
> > >
> > >   root@(none):~# /etc/init.d/xencommons start
> > >   Starting C xenstored....WARNING: Failed to open connection to gnttab
> > >   FATAL: Failed to open evtchn device: No such file or directory
> > >   .............................
> > >   Could not start xenstored
> > >
> > > Just to recap, I'm now passing init=/bin/sh; any dependent services
> > > that would have otherwise started by upstart wouldn't have started
> > > by now.  I'm not sure if there's something needed to be done before
> > > this!
> >
> > These are missing drivers. You might need to run mknod a few times for
> > the xen devices in /proc/misc, or arrange for udev to run somehow and
> > do it for you.
> 
> Thanks. Having created the nodes manually, I'm able to start xencommons,
> with one exception:
> 
>   Starting QEMU as disk backend for dom0
>   /etc/init.d/xencommons: line 121: /usr/local/lib/xen/bin/qemu-system-i386: 
> No such file or directory
> 
> I'm not sure if this is a problem. I can't find any i386 binaries in the
> file system.

You can ignore that.

> With that, I can run, for example, the command 'xl list' and it lists
> Dom0 as a running domain (phew!). I hope to launch a DomU guest using
> 'xl create' command. I looked around the Internet to see if I can get a
> sample file for an ARM guest, but with no success. I'm a bit dazed at
> the number of options, which one's are required etc. Please could I
> borrow one that I can use on Versatile Express board?

http://wiki.xen.org/wiki/Xen_ARM_with_Virtualization_Extensions#DomU_kernel_and_DTS
 has a simple example configuration.

Ian.


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