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| author | Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> | 2012-09-25 17:26:51 +0100 |
|---|---|---|
| committer | Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> | 2012-10-09 18:19:43 +0100 |
| commit | f32db4613db5f8e674a9ac4ec561cb6bc450e247 (patch) | |
| tree | faf413344c33b0cc9eda291a3026e11cbfb05501 /Documentation | |
| parent | 520028743117cee96f1453c5effba1b2fc983eaa (diff) | |
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 <sudeep.karkadanagesha@arm.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/arm/pmu.txt | 3 |
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 --- a/Documentation/devicetree/bindings/arm/pmu.txt +++ b/Documentation/devicetree/bindings/arm/pmu.txt @@ -16,6 +16,9 @@ Required properties: "arm,arm1176-pmu" "arm,arm1136-pmu" - 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. Example: |