On Mon, May 04, 2026 at 09:18:01PM +0000, Colton Lewis wrote: > We may want a partitioned PMU but not have FEAT_FGT to untrap the > specific registers that would normally be untrapped. Add handling for > those trapped register accesses that does the right thing if the PMU > is partitioned. > > For registers that shouldn't be written to hardware because they > require special handling (PMEVTYPER and PMOVS), write to the virtual > register. A later patch will ensure these are handled correctly at > vcpu_load time. > > Signed-off-by: Colton Lewis <[email protected]>
I'd prefer an approach that provides a single accessor helper that takes a vcpu_sysreg enum as an argument and internally handles the dispatch between partitioned and emulated PMUs. That goes for all of the PMU sysregs. This will help you reuse some of the PMU emuation code that you'll still need for things like nested... Thanks, Oliver
