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

Signed-off-by: Kajol Jain <>
 Documentation/ABI/testing/sysfs-bus-nvdimm | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-nvdimm 
index bff84a16812a..64004d5e4840 100644
--- a/Documentation/ABI/testing/sysfs-bus-nvdimm
+++ b/Documentation/ABI/testing/sysfs-bus-nvdimm
@@ -6,3 +6,38 @@ Description:
 The libnvdimm sub-system implements a common sysfs interface for
 platform nvdimm resources. See Documentation/driver-api/nvdimm/.
+What:           /sys/bus/event_source/devices/nmemX/format
+Date:           September 2021
+KernelVersion:  5.16
+Contact:        Kajol Jain <>
+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::
+                       ctl_res_cnt = "event=0x1"
+What:           /sys/bus/event_source/devices/nmemX/events
+Date:           September 2021
+KernelVersion:  5.16
+Contact:        Kajol Jain <>
+Description:   (RO) Attribute group to describe performance monitoring events
+                for the nvdimm memory device. 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 
+                (See ABI/testing/sysfs-bus-event_source-devices-events). A
+                listing of the events supported by a given nvdimm provider type
+                can be found in Documentation/driver-api/nvdimm/$provider.
+What:          /sys/bus/event_source/devices/nmemX/cpumask
+Date:          September 2021
+KernelVersion:  5.16
+Contact:        Kajol Jain <>
+Description:   (RO) This sysfs file exposes the cpumask which is designated to
+               to retrieve nvdimm pmu event counter data.

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