ARMv8 provides support for chained PMU counters, where an event type of 0x001E is set for odd-numbered counters, the event counter will increment by one for each overflow of the preceding even-numbered counter. Let's emulate this in KVM by creating a 64 bit perf counter when a user chains two emulated counters together. Andrew Murray (4): KVM: arm/arm64: extract duplicated code to own function KVM: arm/arm64: re-create event when setting counter value KVM: arm/arm64: lazily create perf events on enable KVM: arm/arm64: support chained PMU counters include/kvm/arm_pmu.h | 2 + virt/kvm/arm/pmu.c | 377 +++++++++++++++++++++++++++++++++++++++++++------- 2 files changed, 327 insertions(+), 52 deletions(-) -- 2.7.4 _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
