On Mon, Dec 10, 2018 at 06:19:33PM +0000, Will Deacon wrote: > Hi Andrew, > > On Mon, Dec 10, 2018 at 09:45:55AM +0000, Andrew Murray wrote: > > This patchset provides support for perf event modifiers :G and :H which > > allows for filtering of PMU events between host and guests when used > > with KVM. > > > > As the underlying hardware cannot distinguish between guest and host > > context, the performance counters must be stopped and started upon > > entry/exit to the guest. This is performed at EL2 in a way that > > minimizes overhead and improves accuracy of recording events that only > > occur in the requested context. > > > > This has been tested with VHE and non-VHE kernels with a KVM guest. > > > > Changes from v5: > > > > - Tweak logic in use of kvm_set_pmu_events > > This looks good to me, but I'll need Acks from the KVM folks on patches 2 > and 4 before I can take it (and Christoffer has some questions on patch 2 > as well). > > Also, please be aware that I'm planning to close the arm64 tree later this > week so we don't have to deal with late issues going into the holidays. Last > Christmas was ruined by specdown and meltre, so I think many of us are due a > proper break this year :) Thanks for the heads up and sounding completely reasonable to me. Thanks, Andrew Murray > > Cheers, > > Will _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
