[PATCH v5 0/7] arm64: perf: Support for chained counters

Hi Suzuki,

On Tue, Jul 10, 2018 at 09:57:57AM +0100, Suzuki K Poulose wrote:

This series adds support for counting PMU events using 64bit counters
for arm64 PMU.

The Arm v8 PMUv3 supports combining two adjacent 32bit counters
(low even and hig odd counters) to count a given "event" in 64bit mode.
This series adds the support for 64bit events in the core arm_pmu driver
infrastructure and adds the support for armv8 64bit kernel PMU to use
chained counters to count in 64bit mode. For CPU cycles, we use the cycle
counter in 64bit mode, only when requested. If the cycle counter is not
available, we fall back to chaining the counters.

Tested on Juno, Fast models. Applies on 4.18-rc4

Thanks, this looks pretty good to me. How far did you get with the perf
fuzzer?

Will