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Re: [Xen-devel] A different probklem with save/restore on C/S 14823.


  • To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Tue, 17 Apr 2007 12:17:41 +0100
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 17 Apr 2007 04:16:55 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acd96tTWE6bfmOneEduH7gAWy6hiGQAACQawAABmlkUAADGnsAABKFp7AJZAkKAAAOryRQAfwysAAAUTVMI=
  • Thread-topic: [Xen-devel] A different probklem with save/restore on C/S 14823.



On 17/4/07 09:54, "Petersson, Mats" <Mats.Petersson@xxxxxxx> wrote:

>> populated? Dump the pagetable walk all the way down to the mapping of
>> address 0: what machine address is mapped there?
> 
> Whilst I agree this is a good path to go down, I'm not quite sure why
> cr3 would point anywhere but to monitor_table, is there any (legal) case
> where cr3 isn't this value when in the hypervisor?

I don't think so. But equally, Xen should never create itself a mapping at
address zero. So it's worth dumping some obvious things and sanity checking
them.

 -- Keir



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