On Fri, 13 Oct 2023 06:29:01 +0100, Oliver Upton <oliver.upton@xxxxxxxxx> wrote: > > Suzuki noticed that KVM's PMU emulation is oblivious to the NSU and NSK > event filter bits. On systems that have EL3 these bits modify the > filter behavior in non-secure EL0 and EL1, respectively. Even though the > kernel doesn't use these bits, it is entirely possible some other guest > OS does. But what does it mean for KVM itself? We have no EL3 to speak of as far as a guest is concerned. And the moment we allow things like NSU/NSK to be set, why don't we allow M as well? Thanks, M. -- Without deviation from the norm, progress is not possible.
