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Re: [Xen-devel] Re: xen/stable 32bit dom0 kernel crashes early

To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Subject: Re: [Xen-devel] Re: xen/stable 32bit dom0 kernel crashes early on boot / works now!
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Tue, 23 Mar 2010 13:18:17 +0200
Cc: Konrad Rzeszutek Wilk <kliw@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, M A Young <m.a.young@xxxxxxxxxxxx>
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On Mon, Mar 22, 2010 at 09:03:18PM -0700, Jeremy Fitzhardinge wrote:
> On 03/19/2010 03:20 PM, M A Young wrote:
>>> Xen is 32 bit, right?
>>> Could you disassemble this whole function, so I can see what register 
>>> the other half is in? (I'm guessing its ecx or esi; nothing else  
>>> makes much sense.)
>> I submitted an earlier report with a more complete dump of this  
>> function, which is at  
>> http://lists.xensource.com/archives/html/xen-devel/2010-02/msg00844.html
>> The code may have changed slightly since then but it looks to be the  
>> same issue.
> OK, I just committed a fix for this.  The IOAPIC dummy mapping wasn't  
> being created properly, and it was failing to mask out the unsupported  
> PTE flags.

And yes, this patch fixes the problem. 32bit PAE dom0 from
xen/stable-2.6.32.x now boots OK for me!


-- Pasi

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