linux-kernel - [PATCH 4/4] powerpc/papr_scm: Document papr

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Message-Id: <20210608115700.85933-5-kjain@linux.ibm.com>
Date:   Tue,  8 Jun 2021 17:27:00 +0530
From:   Kajol Jain <kjain@...ux.ibm.com>
To:     mpe@...erman.id.au, linuxppc-dev@...ts.ozlabs.org,
        nvdimm@...ts.linux.dev, linux-kernel@...r.kernel.org,
        peterz@...radead.org
Cc:     maddy@...ux.vnet.ibm.com, santosh@...six.org,
        aneesh.kumar@...ux.ibm.com, vaibhav@...ux.ibm.com,
        dan.j.williams@...el.com, ira.weiny@...el.com,
        atrajeev@...ux.vnet.ibm.com, tglx@...utronix.de,
        kjain@...ux.ibm.com, rnsastry@...ux.ibm.com
Subject: [PATCH 4/4] powerpc/papr_scm: Document papr_scm sysfs event format entries

Details is added for the event, cpumask and format attributes
in the ABI documentation.

Signed-off-by: Kajol Jain <kjain@...ux.ibm.com>
---
 Documentation/ABI/testing/sysfs-bus-papr-pmem | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-papr-pmem b/Documentation/ABI/testing/sysfs-bus-papr-pmem
index 92e2db0e2d3d..be91de341454 100644
--- a/Documentation/ABI/testing/sysfs-bus-papr-pmem
+++ b/Documentation/ABI/testing/sysfs-bus-papr-pmem
@@ -59,3 +59,34 @@ Description:
 		* "CchRHCnt" : Cache Read Hit Count
 		* "CchWHCnt" : Cache Write Hit Count
 		* "FastWCnt" : Fast Write Count
+
+What:		/sys/devices/nmemX/format
+Date:		June 2021
+Contact:	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>, linux-nvdimm@...ts.01.org,
+Description:	(RO) Attribute group to describe the magic bits
+                that go into perf_event_attr.config for a particular pmu.
+                (See ABI/testing/sysfs-bus-event_source-devices-format).
+
+                Each attribute under this group defines a bit range of the
+                perf_event_attr.config. Supported attribute is listed
+                below::
+
+		    event  = "config:0-4"  - event ID
+
+		For example::
+		    noopstat = "event=0x1"
+
+What:		/sys/devices/nmemX/events
+Date:		June 2021
+Contact:	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>, linux-nvdimm@...ts.01.org,
+Description:    (RO) Attribute group to describe performance monitoring
+                events specific to papr-scm. Each attribute in this group describes
+                a single performance monitoring event supported by this nvdimm pmu.
+                The name of the file is the name of the event.
+                (See ABI/testing/sysfs-bus-event_source-devices-events).
+
+What:		/sys/devices/nmemX/cpumask
+Date:		June 2021
+Contact:	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>, linux-nvdimm@...ts.01.org,
+Description:	(RO) This sysfs file exposes the cpumask which is designated to make
+                HCALLs to retrieve nvdimm pmu event counter data.
-- 
2.27.0