Re: [Xen-devel] vlapic warning messages

To:	Ky Srinivasan <ksrinivasan@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] vlapic warning messages
From:	Keir Fraser <keir@xxxxxxxxxxxxx>
Date:	Wed, 14 Mar 2007 11:24:08 +0000
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On 13/3/07 21:56, "Ky Srinivasan" <ksrinivasan@xxxxxxxxxx> wrote:

> While running unmodified  guests  I sometime  get the following warning
> message from vlapic:
> 
> vlapic.c:217:d0 Bad DFR value for lapic of vcpu 0
> 
> Any ideas on what the problem might be.

Can you extend that line of tracing to print the bad value
(vlapic_get_reg(vlapic, APIC_DFR))?

I'd say it's most likely that the guest is writing zeroes into reserved-1
bits of the DFR, and we should be ignoring the modification of those bits.

 -- Keir

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Re: [Xen-devel] vlapic warning messages