From: Kajol Jain <kjain@linux.ibm.com>
To: mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com,
atrajeev@linux.vnet.ibm.com, disgoel@linux.ibm.com,
kjain@linux.ibm.com, linux-perf-users@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 06/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_virtual_processor sysfs interface file
Date: Mon, 10 Jul 2023 14:57:13 +0530 [thread overview]
Message-ID: <20230710092717.55317-7-kjain@linux.ibm.com> (raw)
In-Reply-To: <20230710092717.55317-1-kjain@linux.ibm.com>
Add details of the new hv-gpci interface file called
"affinity_domain_via_virtual_processor" in the ABI documentation.
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
---
.../sysfs-bus-event_source-devices-hv_gpci | 32 +++++++++++++++++++
1 file changed, 32 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 aff52dc3b05c..3b63d66658fe 100644
--- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci
+++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci
@@ -144,3 +144,35 @@ Description: admin read only
more information.
* "-EFBIG" : System information exceeds PAGE_SIZE.
+
+What: /sys/devices/hv_gpci/interface/affinity_domain_via_virtual_processor
+Date: July 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
+ AFFINITY_DOMAIN_INFORMATION_BY_VIRTUAL_PROCESSOR(0xA0).
+
+ * This sysfs file will be created only for power10 and above platforms.
+
+ * User needs root privileges to read data from this sysfs file.
+
+ * This sysfs file will be created, only when the HCALL returns "H_SUCESS",
+ "H_AUTHORITY" and "H_PARAMETER" as the return type.
+
+ HCALL with return error type "H_AUTHORITY", can be resolved during
+ runtime by setting "Enable Performance Information Collection" option.
+
+ * The end user reading this sysfs file must decode the content as per
+ underlying platform/firmware.
+
+ Possible error codes while reading this sysfs file:
+
+ * "-EPERM" : Partition is not permitted to retrieve performance information,
+ required to set "Enable Performance Information Collection" option.
+
+ * "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address
+ or because of some hardware error. Refer getPerfCountInfo documentation for
+ more information.
+
+ * "-EFBIG" : System information exceeds PAGE_SIZE.
--
2.31.1
next prev parent reply other threads:[~2023-07-10 9:28 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-10 9:27 [PATCH v2 00/10] Add sysfs interface files to hv_gpci device to expose system information Kajol Jain
2023-07-10 9:27 ` [PATCH v2 01/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor bus topology information Kajol Jain
2023-07-10 9:27 ` [PATCH v2 02/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document processor_bus_topology sysfs interface file Kajol Jain
2023-07-11 20:52 ` Randy Dunlap
2023-07-14 7:02 ` kajoljain
2023-07-10 9:27 ` [PATCH v2 03/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show processor config information Kajol Jain
2023-07-10 9:27 ` [PATCH v2 04/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document processor_config sysfs interface file Kajol Jain
2023-07-11 20:54 ` Randy Dunlap
2023-07-10 9:27 ` [PATCH v2 05/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via virtual processor information Kajol Jain
2023-07-10 9:27 ` Kajol Jain [this message]
2023-07-11 20:56 ` [PATCH v2 06/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_virtual_processor sysfs interface file Randy Dunlap
2023-07-10 9:27 ` [PATCH v2 07/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via domain information Kajol Jain
2023-07-10 9:27 ` [PATCH v2 08/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_domain sysfs interface file Kajol Jain
2023-07-11 20:57 ` Randy Dunlap
2023-07-10 9:27 ` [PATCH v2 09/10] powerpc/hv_gpci: Add sysfs file inside hv_gpci device to show affinity domain via partition information Kajol Jain
2023-07-10 9:27 ` [PATCH v2 10/10] docs: ABI: sysfs-bus-event_source-devices-hv_gpci: Document affinity_domain_via_partition sysfs interface file Kajol Jain
2023-07-11 20:58 ` Randy Dunlap
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