On Tue, Jan 29, 2008 at 05:35:34PM +0100, Carsten Otte wrote: > Avi Kivity wrote: > > Every arch except s390 needs it. An ugly #ifndef > > CONFIG_KVM_HARDWARE_TLB_SYNC is preferred to duplicating the code. > BTW, from reading AMDs spec I don't expect NPT to need this vehicle
By your conclusion I suppose you thought NPT maps guest physical to host virtual. If it was the case the cpu would to walk three layer of pagetables (each layer is an arrow): guest virtual -> guest physical -> host virtual -> host physical. Instead it's just guest virtual -> guest physical -> host physical. Or even less for shadow: guest virtual -> host physical, which is why shadow should be faster for number crunching still (and definitely slower for dbms). ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
