Add details of the new hv-gpci interface file called
"processor_config" in the ABI documentation.
Signed-off-by: Kajol Jain <kj...@linux.ibm.com>
---
.../sysfs-bus-event_source-devices-hv_gpci | 15 +++++++++++++++
1 file changed, 15 insertions(+)
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 6d633167268e..003d94afbbcd 100644
--- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci
+++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci
@@ -109,3 +109,18 @@ Description: admin read only
more information.
* "-EFBIG" : System information exceeds PAGE_SIZE.
+
+What: /sys/devices/hv_gpci/interface/processor_config
+Date: June 2023
+Contact: Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org>
+Description: admin read only
+ This sysfs file exposes the system topology information by
making HCALL
+ H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request
value
+ PROCESSOR_CONFIG(0x90).
+ * This sysfs file is only be created for power10 and above
platforms.
+ * User need root access to read data from this sysfs file.
+ * Incase the HCALL fails with hardware/permission issue, or the
support for
+ PROCESSOR_CONFIG counter request value removed, this sysfs
file still be
+ created and give error when reading it.
+ * The end user reading this sysfs file need to decode sysfs
file data as per
+ underneath platform/firmware.
--
2.35.3
