RE: [Xen-devel] getting debug output out of hvmloader and qemu-dm

["Kamala Narasimhan" <Kamala.Narasimhan@xxxxxxxxxx>]

I think I have encountered this issue before.  I could be wrong but if
my memory serves me right, I built the hypervisor/tools with debug=y
(apart from setting the vgabios preprocessor flag) and then I got the
output through xm dmesg.

Kamala

> -----Original Message-----
> From: James Harper [mailto:james.harper@xxxxxxxxxxxxxxxx]
> Sent: Wednesday, July 02, 2008 10:48 PM
> To: Kamala Narasimhan; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-devel] getting debug output out of hvmloader and
qemu-dm
> 
> > If it is the *DEBUG* preprocessor flag in vgabios that you enabled,
> did
> > you check xen message buffer (xm dmesg) or serial output?
> 
> 'xm dmesg' doesn't show me anything... how might I look at the serial
> output?
> 
> Looking at vgabios.c, the 'printf' function that is used for debugging
> appears to write to port 0xe9, but I can't see that anything actually
> reads that.
> 
> James


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