On Sep 17, 2015 5:33 AM, "Peter Zijlstra" <peterz@xxxxxxxxxxxxx> wrote: > > On Thu, Sep 17, 2015 at 01:40:30PM +0200, Paolo Bonzini wrote: > > > > > > On 17/09/2015 10:58, Peter Zijlstra wrote: > > > But the far greater problem I have with the whole virt thing is that > > > you cannot use rdmsr_safe() to probe if an MSR exists at all because, as > > > you told me, these virt thingies return 0 for all 'unknown' MSRs instead > > > of faulting. > > > > At least for KVM, that behavior is opt-in (the ignore_msrs parameter) > > and no distro that I know enables it by default. > > Ah, that would be good news. Andy earlier argued I could not rely on > rdmsr_safe() faulting on unknown MSRs. If practically we can there's > some code I can simplify :-) I was taking about QEMU TCG, not KVM. --Andy -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
