On 2014-06-29 13:51, Borislav Petkov wrote: > On Sun, Jun 29, 2014 at 12:59:30PM +0200, Jan Kiszka wrote: >> Will see what I can do regarding bisecting. That host is a bit slow >> (netbook), so it may take a while. Boris will probably beat me in >> this. > > Nah, I was about to instrument kvm_multiple_exception() first and am > slow anyway so... :-) OK, looks like I won ;): The issue was apparently introduced with "KVM: x86: get CPL from SS.DPL" (ae9fedc793). Maybe we are not properly saving or restoring this state on SVM since then. Need a break, will look into details later. Jan