Re: [PATCH v3 3/6] perf: implement pmu perf_kprobe

On Thu, Nov 30, 2017 at 03:50:20PM -0800, Song Liu wrote:

+	tp_event = create_local_trace_kprobe(
+		func, (void *)(unsigned long)(p_event->attr.kprobe_addr),
+		p_event->attr.probe_offset, p_event->attr.config != 0);

So you want to explicitly test bit0 instead? That would leave the other
63 bits available for future extension. The current implementation
completely consumes all 64bits of that config space.