[PATCH v3 35/46] perf/x86/intel/cmt: use PERF_EV_CAP_CGROUP_NO_RECURSION in intel_cmt

[David Carrillo-Cisneros]

Use newly added flag.

Signed-off-by: David Carrillo-Cisneros <davidcc@xxxxxxxxxx>
---
 arch/x86/events/intel/cmt.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/x86/events/intel/cmt.c b/arch/x86/events/intel/cmt.c
index 614b2f4..194038b 100644
--- a/arch/x86/events/intel/cmt.c
+++ b/arch/x86/events/intel/cmt.c
@@ -1734,6 +1734,14 @@ static int intel_cmt_event_init(struct perf_event *event)
 	INIT_LIST_HEAD(&event->hw.cmt_list);
 
 	/*
+	 * CMT hw only allows one rmid per core at the time and therefore
+	 * it is not compatible with the way generic code handles cgroup
+	 * dependencies.
+	 */
+	if (event->cgrp)
+		event->event_caps |= PERF_EV_CAP_CGROUP_NO_RECURSION;
+
+	/*
 	 * Task events can be read in any CPU in any package. CPU events
 	 * only in CPU's package. Both can read even if inactive.
 	 */
-- 
2.8.0.rc3.226.g39d4020