|author||Sudeep KarkadaNagesha <email@example.com>||2012-09-25 17:26:51 +0100|
|committer||Alex Shi <firstname.lastname@example.org>||2014-07-16 12:05:52 +0800|
ARM: perf: set cpu affinity to support multiple PMUs
In a system with multiple heterogeneous CPU PMUs and each PMUs can handle events on a subset of CPUs, probably belonging a the same cluster. This patch introduces a cpumask to track which CPUs each PMU supports. It also updates armpmu_event_init to reject cpu-specific events being initialised for unsupported CPUs. Since process-specific events can be initialised for all the CPU PMUs,armpmu_start/stop/add are modified to prevent from being added on unsupported CPUs. Signed-off-by: Sudeep KarkadaNagesha <email@example.com> (cherry picked from commit 7b12ebf38f57a175e1068e986b5d58e7225f1817) Signed-off-by: Alex Shi <firstname.lastname@example.org>
Diffstat (limited to 'Documentation/devicetree/bindings')
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/pmu.txt b/Documentation/devicetree/bindings/arm/pmu.txt
index 3e1e498fea96..a2dbf67c1cb7 100644
@@ -17,6 +17,9 @@ Required properties:
- interrupts : 1 combined interrupt or 1 per core.
+- cluster : a phandle to the cluster to which it belongs
+ If there are more than one cluster with same CPU type
+ then there should be separate PMU nodes per cluster.