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From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
To: acme@kernel.org, jolsa@kernel.org, mpe@ellerman.id.au
Cc: linux-perf-users@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-kernel@vger.kernel.org, maddy@linux.vnet.ibm.com,
	rnsastry@linux.ibm.com, kjain@linux.ibm.com,
	disgoel@linux.vnet.ibm.com, irogers@google.com
Subject: [PATCH V3 2/2] docs: ABI: sysfs-bus-event_source-devices: Document sysfs caps entry for PMU
Date: Fri, 20 May 2022 14:16:30 +0530	[thread overview]
Message-ID: <20220520084630.15181-2-atrajeev@linux.vnet.ibm.com> (raw)
In-Reply-To: <20220520084630.15181-1-atrajeev@linux.vnet.ibm.com>

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 <atrajeev@linux.vnet.ibm.com>
---
 .../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
-- 
2.35.1


WARNING: multiple messages have this Message-ID (diff)
From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
To: acme@kernel.org, jolsa@kernel.org, mpe@ellerman.id.au
Cc: irogers@google.com, maddy@linux.vnet.ibm.com,
	rnsastry@linux.ibm.com, kjain@linux.ibm.com,
	linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
	disgoel@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH V3 2/2] docs: ABI: sysfs-bus-event_source-devices: Document sysfs caps entry for PMU
Date: Fri, 20 May 2022 14:16:30 +0530	[thread overview]
Message-ID: <20220520084630.15181-2-atrajeev@linux.vnet.ibm.com> (raw)
In-Reply-To: <20220520084630.15181-1-atrajeev@linux.vnet.ibm.com>

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 <atrajeev@linux.vnet.ibm.com>
---
 .../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
-- 
2.35.1


  reply	other threads:[~2022-05-20  8:47 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-20  8:46 [PATCH V3 1/2] powerpc/perf: Add support for caps under sysfs in powerpc Athira Rajeev
2022-05-20  8:46 ` Athira Rajeev
2022-05-20  8:46 ` Athira Rajeev [this message]
2022-05-20  8:46   ` [PATCH V3 2/2] docs: ABI: sysfs-bus-event_source-devices: Document sysfs caps entry for PMU Athira Rajeev
2022-07-29 13:01 ` [PATCH V3 1/2] powerpc/perf: Add support for caps under sysfs in powerpc Michael Ellerman
2022-07-29 13:01   ` Michael Ellerman

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