Re: [Xen-devel] Possible issue with x86_emulate when writing results back to memory

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 09.01.14 at 18:33, Simon Graham <simon.graham@xxxxxxxxxx> wrote:
> I agree that it _shouldn't_ end up emulating -- but the shadow page fault 
> routine has a ton of code paths that I've never managed to fully grok 
> 
> (As an aside, I've previously looked at other cases where the shadow code 
> ends up emulating instructions that are unexpected that cause VMs to hang 
> because the shadow module doesn't have a proper implementation of the 
> x86_emulate callbacks... e.g. if you try to run the old MS Virtual Server 
> product inside a Xen VM that has logdirty enabled it _will_ hard hang).

Perhaps that's then what really needs fixing?

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel