WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

Re: [Xen-devel] Mini-OS and serial output

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] Mini-OS and serial output
From: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxxxxxxx>
Date: Mon, 9 Jul 2007 10:55:21 +0200
Cc: lists@xxxxxxxxx, Keir Fraser <keir@xxxxxxxxxxxxx>
Delivery-date: Mon, 09 Jul 2007 01:53:11 -0700
Domainkey-signature: s=s768; d=fujitsu-siemens.com; c=nofws; q=dns; b=o6bKktFT/3aRhN4iwqk4SdUkfBwvQ00M4pH2OxYMVk9NJ9T3Mg9aZUpUjvNOhemtWD8bPd33h94pm5iZy2RvKTcJbur5l2yNBtIV63ndwZTDQohxQj1CHtgkqvuQmTCw;
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <C2B7B5BD.1210E%keir@xxxxxxxxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <C2B7B5BD.1210E%keir@xxxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: KMail/1.9.6
Am Montag, 9. Juli 2007 schrieb Keir Fraser:
> On 9/7/07 09:42, "Michael Frey" <lists@xxxxxxxxx> wrote:
> > I've built Xen with "make debug=y" and added some necessary lines to
> > grub.conf. Furthermore I've connected a second workstation via serial to
> > the Xen workstation and I got the the output from the boot process and
> > various other things. I start the mini-os domain and I get no
> > "Bootstrapping .." line as defined in extras/mini-os/kernel.c
> >
> > So I have a debug build of Xen (I suggest) and I get some output via
> > serial console, but the mini-os serial output doesn't seem to work.
> > Suggestions?
>
> Add some tracing to the hypercall inside Xen, conditional on calling domain
> id being != 0, to confirm that the hypercall is actually being invoked, and
> to discover why the messages are being dropped.

You must build Xen with the VERBOSE flag switched on. 
This is done by make verbose=y (see Rules.mk)
You may have a look at xen/drivers/char/console.c
In function do_console_io() you can see, that per default the hypervisor 
console calls from domU's are ignored.

Dietmar.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel