Re: [Xen-devel] regression from 22242:7831b8e5aae2 (x86 guest pagetable walker: check for invalid bits in pagetable entries)?

["Jan Beulich" <jbeulich@xxxxxxxx>]

>>> Tim Deegan <tim@xxxxxxx> 02/23/12 11:34 AM >>>
>I've applied it, since it seemed not to break anything and I'll be away
>from my test boxes for a while.  Let me know of you're still seeing any
>problems. 

Thanks - I had hoped we would have reported testing results earlier, but
this unfortunately is going pretty slowly.

One thing though - shouldn't further walking be suppressed if at a
given level any violation is detected (i.e. if rc became non-zero)? For
sure the hardware aborts a walk at least if reserved bits are found
set, and I'd suspect it also doesn't bother continuing the walk if access
rights don't permit the result to be used.

Jan


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