From 792f73f747b82f6cb191a323e1f5755d33149b50 Mon Sep 17 00:00:00 2001 From: Kajol Jain Date: Thu, 9 Jul 2020 10:48:36 +0530 Subject: powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show cpumask Patch here adds a cpumask attr to hv_24x7 pmu along with ABI documentation. Primary use to expose the cpumask is for the perf tool which has the capability to parse the driver sysfs folder and understand the cpumask file. Having cpumask file will reduce the number of perf command line parameters (will avoid "-C" option in the perf tool command line). It can also notify the user which is the current cpu used to retrieve the counter data. command:# cat /sys/devices/hv_24x7/interface/cpumask 0 Signed-off-by: Kajol Jain Reviewed-by: Madhavan Srinivasan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200709051836.723765-3-kjain@linux.ibm.com --- Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7 | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Documentation/ABI') diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7 b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7 index e8698afcd952..f7e32f218f73 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7 +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7 @@ -43,6 +43,13 @@ Description: read only This sysfs interface exposes the number of cores per chip present in the system. +What: /sys/devices/hv_24x7/interface/cpumask +Date: July 2020 +Contact: Linux on PowerPC Developer List +Description: read only + This sysfs file exposes the cpumask which is designated to make + HCALLs to retrieve hv-24x7 pmu event counter data. + What: /sys/bus/event_source/devices/hv_24x7/event_descs/ Date: February 2014 Contact: Linux on PowerPC Developer List -- cgit v1.2.3