On Tue, 03 Jan 2023 12:40:34 +0000, Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> wrote: > > On Thu, 29 Dec 2022 19:59:21 -0800 > Reiji Watanabe <reijiw@xxxxxxxxxx> wrote: > > > The goal of this series is to allow userspace to limit the number > > of PMU event counters on the vCPU. > > Hi Rieji, > > Why do you want to do this? > > I can conjecture a bunch of possible reasons, but they may not > match up with your use case. It would be useful to have that information > in the cover letter. The most obvious use case is to support migration across systems that implement different numbers of counters. Similar reasoning could also apply to the debug infrastructure (watchpoints, breakpoints). In any case, being able to decouple the VM from the underlying HW within the extent that the architecture permits it seems like a valuable goal. Thanks, M. -- Without deviation from the norm, progress is not possible. _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
