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| author | Kajol Jain <kjain@linux.ibm.com> | 2020-10-03 10:49:43 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-10-07 14:34:49 +0300 |
| commit | 09b791d95559ef82542063333ecaa2ac9d57118e (patch) | |
| tree | 83df26f2094eaa8b0cfe630250e39e9dca5d22c9 /Documentation/ABI | |
| parent | dcb5cdf60a1fbbdb3b4dd2abc562206481f09ef1 (diff) | |
| download | linux-09b791d95559ef82542063333ecaa2ac9d57118e.tar.xz | |
powerpc/hv-gpci: Add sysfs files inside hv-gpci device to show cpumask
Patch here adds a cpumask attr to hv_gpci 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_gpci/cpumask
0
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201003074943.338618-5-kjain@linux.ibm.com
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci index ed989869d116..6a023b42486c 100644 --- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci +++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci @@ -72,3 +72,10 @@ Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org> Description: A number indicating the latest version of the gpci interface that the kernel is aware of. + +What: /sys/devices/hv_gpci/cpumask +Date: October 2020 +Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org> +Description: read only + This sysfs file exposes the cpumask which is designated to make + HCALLs to retrieve hv-gpci pmu event counter data. |