linux-kernel - [PATCH v2 09/10] platform/x86/intel/ifs: add ABI documentation for IFS

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Date:   Thu,  7 Apr 2022 12:13:46 -0700
From:   Jithu Joseph <jithu.joseph@...el.com>
To:     hdegoede@...hat.com, markgross@...nel.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        corbet@....net, gregkh@...uxfoundation.org,
        andriy.shevchenko@...ux.intel.com, jithu.joseph@...el.com,
        ashok.raj@...el.com, tony.luck@...el.com, rostedt@...dmis.org,
        dan.j.williams@...el.com, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        patches@...ts.linux.dev, ravi.v.shankar@...el.com
Subject: [PATCH v2 09/10] platform/x86/intel/ifs: add ABI documentation for IFS

Add the sysfs attributes in ABI/testing for In-Field Scan.

Reviewed-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Jithu Joseph <jithu.joseph@...el.com>
---
 .../ABI/testing/sysfs-platform-intel-ifs      | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 Documentation/ABI/testing/sysfs-platform-intel-ifs

diff --git a/Documentation/ABI/testing/sysfs-platform-intel-ifs b/Documentation/ABI/testing/sysfs-platform-intel-ifs
new file mode 100644
index 000000000000..54dc6cd75484
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-platform-intel-ifs
@@ -0,0 +1,54 @@
+What:		/sys/devices/platform/intel_ifs/run_test
+Date:		April 07, 2022
+KernelVersion:	5.19.0
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	echo <cpu#> to trigger ifs test for all online cores.
+		For e.g to test cpu5 do echo 5 > /sys/devices/platform/intel_ifs/run_test
+
+What:		/sys/devices/platform/intel_ifs/status
+Date:		April 07, 2022
+KernelVersion:	5.19.0
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	The status of the last test. It can be one of "pass", "fail"
+		or "untested".
+
+What:		/sys/devices/system/cpu/cpu#/ifs/details
+Date:		April 07, 2022
+KernelVersion:	5.19.0
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	Additional information regarding the last test. The details file reports
+		the hex value of the SCAN_STATUS MSR. Note that the error_code field
+		may contain driver defined software code not defined in the Intel SDM.
+
+What:		/sys/devices/platform/intel_ifs/image_version
+Date:		April 07, 2022
+KernelVersion:	5.19.0
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	Version of loaded IFS binary image.
+
+What:		/sys/bus/platform/drivers/intel_ifs/bind
+Date:		April 07, 2022
+KernelVersion:	5.19.0
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	echo "intel_ifs" to reload IFS image.
+
+What:		/sys/module/intel_ifs/parameters/noirq
+Date:		April 07, 2022
+KernelVersion:	5.19.0
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	IFS tunable parameter that user can modify before
+		the scan run if they wish to override default value.
+
+		When set, system interrupts are not allowed to interrupt an IFS. The
+		default state for this parameter is set.
+
+What:		/sys/module/intel_ifs/parameters/retry
+Date:		April 07, 2022
+KernelVersion:	5.19.0
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	IFS tunable parameter that user can modify before scan run
+		if they wish to override default value.
+
+		Maximum retry counter when the test is not executed due to an
+		event such as interrupt. The default value is 5, it can be set to any
+		value from 1 to 20.
-- 
2.17.1