The NVIDIA Tegra T264 SOC has a HW issue where events captured on a
prior experiment can corrupt the current experiment. This adds a
workaround which involves the following steps:
1. First experiment ends; Disable PMCR.E as we do normally
2. Clear PMCNTEN for all counters
3. Enable PMCR.E
4. Disable PMCR.E
5. Enable back PMCNTEN for counters cleared in step 2
Bug 5524939
Change-Id: Ie5885b9bb9495aa0cfb1844a88cbdc7e0509ce67
Signed-off-by: Eric Funsten <efunsten@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/3rdparty/canonical/linux-noble/+/3459618
Reviewed-by: Besar Wicaksono <bwicaksono@nvidia.com>
Tested-by: Ryan Bissell <rbissell@nvidia.com>
GVS: buildbot_gerritrpt <buildbot_gerritrpt@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Eric Funsten
14898fb272