On 15/06/18 08:04, Jiri Kosina wrote: > On Fri, 15 Jun 2018, Juergen Gross wrote: > >> wrong for 64-bit, too, in case the mitigation is disabled at hypervisor >> level. > > If that is indeed possible (is it?), then the check we have in > pti_check_boottime_disable() is wrong as well.
No, it isn't. PTI for 32-bit kernels isn't paravirtualized, so it has to be disabled. > >> So the test should be done only for CONFIG_X86_64 > > Fair enough. > >> and the returned string should be e.g. "Mitigation: XEN". > > Well, perhaps; it'd confuse all the scripts that are checking whether > system is fully secured or not by parsing sysfs files ... but that's > mostly their problem. Right. And I suppose those scripts are fairly new. :-) Juergen
