|author||Sudeep KarkadaNagesha <email@example.com>||2012-09-25 17:26:51 +0100|
|committer||Jon Medhurst <firstname.lastname@example.org>||2013-07-17 11:12:04 +0100|
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>
Diffstat (limited to 'Documentation')
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/pmu.txt b/Documentation/devicetree/bindings/arm/pmu.txt
index 343781b9f24..4ce82d045a6 100644
@@ -16,6 +16,9 @@ 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.