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RE: [Xen-devel] problems with console in domU if physdev access enabled

To: "Maurice Meeden" <tux@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] problems with console in domU if physdev access enabled
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Sat, 19 Mar 2005 09:28:33 -0000
Cc: <ian.pratt@xxxxxxxxxxxx>
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Thread-topic: [Xen-devel] problems with console in domU if physdev access enabled
 

> I am trying to build a working domU kernel with 
> CONFIG_XEN_PHYSDEV_ACCESS=y. But
> if this enabled, domU fails to boot with different errors 
> about the console.
> With kernel 2.6.10 and xen 2.0.5 this error occurs if I try 
> to start the Domain:
> ..
> WARNING: Failed to register Xen virtual console driver as 'tty1'
> ..
> Warning: unable to open an initial console.
> Unable to handle kernel NULL pointer dereference at virtual 

It sounds like you might be building in a serial UART (8250) into your
domU kernel which is grabbing the tty.

Ian


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