>>> On 14.01.15 at 18:35, <edmund.h.wh...@intel.com> wrote: > On 01/14/2015 03:28 AM, Tamas K Lengyel wrote: >> At the mem_access trap point you can swap in an altp2m where the >> gfn->mfn mapping is the one where the breakpoints are hidden, >> singlestep, then swap the original p2m back. While this approach still >> has some overhead because of the use of singlestepping, it is going to >> be faster then what you currently have to do, which is removing all >> breakpoints, singlestep, then put breakpoints back. Now it would just >> be a matter of swapping a single pointer. > > Right. The key observation is that at any single point in time, a given > hardware thread can be fetching an instruction or reading data, but not > both.
Fine, as long as an instruction reading itself isn't going to lead to a live lock. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
