Commit 999d7c47 authored by Athira Rajeev's avatar Athira Rajeev Committed by Michael Ellerman
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docs: ABI: sysfs-bus-event_source-devices: Document sysfs caps entry for PMU 



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: default avatarAthira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220520084630.15181-2-atrajeev@linux.vnet.ibm.com
parent 6320e693

Documentation/ABI/testing/sysfs-bus-event_source-devices-caps

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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