On 08/08/2016 21:35, Alina wrote: > Hello, > > When I try to enable shadow page table features using the shadow_control > function, I get this message in the hypervisor logs: "Tried to do a paging > op on itself". After backtracking to the source of this message, I > discovered it comes from the condition: "if ( unlikely(d == current->domain) > )", which means that the hypervisor does not consider the current domain as > the same domain I give as parameter, even though I checked and their > domain_id is the same.
unlikely($X) is an optimisation, which causes the compiler to reorder the jumps to avoid branch misprediction penalties, based on the programmers assertion of which case is more likely. > > Does anyone have any idea why the hypervisor does not see them as being > equal? They are equal, and that is the problem. I presume you are trying to enable logdirty mode (you haven't specified which shadow_control you are trying to enable), but it is not permitted for a domain to make such adjustments to itself. ~Andrew _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
