Re: [PATCH V0 2/3] perf/x86/intel/bm.c: Add Intel Branch Monitoring support

[Jiri Olsa]

On Fri, Nov 03, 2017 at 11:00:05AM -0700, Megha Dey wrote:

SNIP

> +	event->event_caps |= PERF_EV_CAP_BM;
> +	/*
> +	 * cfg contains one of the 6 possible Branch Monitoring events
> +	 */
> +	cfg = event->attr.config;
> +	if (cfg < 0 || cfg > (BM_MAX_EVENTS - 1))
> +		return -EINVAL;
> +
> +	if (event->attr.sample_period) /* no sampling */
> +		return -EINVAL;

you can use the 'is_sampling_event' function

jirka