Re: [Xen-devel] Critical bug: VT-d fault causes disk corruption or Dom0 kernel panic.

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 24/01/2009 09:15, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:

>> I talked to Joe Cihula about this.  He is suggesting map only the RAM memory
>> in E820 table.  This is more secure than map everything below max_page.  We
>> can do this for x86_64 and x86_32.  For IA-64, we still map everything below
>> max_page as there is no tboot issue.
>> 
>> What do you think of is approach?
> 
> That's an orthogonal issue to avoiding Xen's RAM, but it at least ought to
> be easy to do. As long as it doesn't skip any private BIOS buffers for any
> devices which are still fully or partially under BIOS control (e.g., via
> SMM). But any such buffers above max_page would already be skipped.
> 
> I can check in a patch for this as well as a patch to fix xen_in_range().
> I'll do both.

Changesets 19081 and 19082.

 -- Keir



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel