[PATCH 04/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document processor_config sysfs interface file
From: Kajol Jain <hidden>
Date: 2023-06-09 11:44:44
Subsystem:
the rest · Maintainer:
Linus Torvalds
Add details of the new hv-gpci interface file called "processor_config" in the ABI documentation. Signed-off-by: Kajol Jain <redacted> --- .../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.
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2.35.3