[PATCH V3 2/2] docs: ABI: sysfs-bus-event_source-devices: Document sysfs caps entry for PMU
From: Athira Rajeev <hidden>
Date: 2022-05-20 08:47:03
Also in:
linux-perf-users, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Details is added about "caps" attribute group in the ABI documentation. This is used to expose some of the PMU attributes in "caps" directory under : /sys/bus/event_source/devices/<dev>/. The dev/caps will contain information about features that platform specific PMU supports. Signed-off-by: Athira Rajeev <redacted> --- .../sysfs-bus-event_source-devices-caps | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-bus-event_source-devices-caps
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-caps b/Documentation/ABI/testing/sysfs-bus-event_source-devices-caps
new file mode 100644
index 000000000000..8757dcf41c08
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-caps@@ -0,0 +1,18 @@ +What: /sys/bus/event_source/devices/<dev>/caps +Date: May 2022 +KernelVersion: 5.19 +Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org> +Description: + Attribute group to describe the capabilities exposed + for a particular pmu. Each attribute of this group can + expose information specific to a PMU, say pmu_name, so that + userspace can understand some of the feature which the + platform specific PMU supports. + + One of the example available capability in supported platform + like Intel is pmu_name, which exposes underlying CPU name known + to the PMU driver. + + Example output in powerpc: + grep . /sys/bus/event_source/devices/cpu/caps/* + /sys/bus/event_source/devices/cpu/caps/pmu_name:POWER9
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2.35.1