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Re: [Xen-devel] Setting page type for GDT page


  • To: Trammell Hudson <hudson@xxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
  • Date: Fri, 31 Aug 2007 18:51:34 +0100
  • Delivery-date: Fri, 31 Aug 2007 10:47:41 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: Acfr95Hd0FAx/1fqEdyT/wAWy6hiGQ==
  • Thread-topic: [Xen-devel] Setting page type for GDT page

You need to MMUEXT_UNPIN_TABLE the original page table provided by the
builder.

 -- Keir

On 31/8/07 17:39, "Trammell Hudson" <hudson@xxxxxxxxxxxxxx> wrote:

> On Fri, Aug 31, 2007 at 05:21:25PM +0100, Keir Fraser wrote:
>> The type code disagrees with you. There's still a writable mapping lurking
>> somewhere. Perhaps not in the page tables you are running on, though. What
>> do you do with the page tables that the domain builder provides you?
> 
> Nothing, so that's a very good possibility.  The domU has already
> switched to its new basetable pointer, but the old L1 page tables
> must be out there, somewhere, and are stil validated.
> 
> Thanks!
> -- Trammell
> 
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