On 05/12/2018 15:30, Andrew Murray wrote:
Add support for the :G and :H attributes in perf by handling the exclude_host/exclude_guest event attributes. We notify KVM of counters that we wish to be enabled or disabled on guest entry/exit and thus defer from starting or stopping :G events as per the events exclude_host attribute. With both VHE and non-VHE we switch the counters between host/guest at EL2. We are able to eliminate counters counting host events on the boundaries of guest entry/exit when using :G by filtering out EL2 for exclude_host. However when using :H unless exclude_hv is set on non-VHE then there is a small blackout window at the guest entry/exit where host events are not captured. Signed-off-by: Andrew Murray <andrew.murray@xxxxxxx> ---
Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx> _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
