linux-kernel - [PATCH v4 10/10] platform/x86/intel/ifs: add ABI documentation for IFS

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Message-Id: <20220422200219.2843823-11-tony.luck@intel.com>
Date:   Fri, 22 Apr 2022 13:02:19 -0700
From:   Tony Luck <tony.luck@...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 v4 10/10] platform/x86/intel/ifs: add ABI documentation for IFS

From: Jithu Joseph <jithu.joseph@...el.com>

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

Reviewed-by: Dan Williams <dan.j.williams@...el.com>
Signed-off-by: Jithu Joseph <jithu.joseph@...el.com>
Co-developed-by: Tony Luck <tony.luck@...el.com>
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 .../ABI/testing/sysfs-platform-intel-ifs      | 39 +++++++++++++++++++
 1 file changed, 39 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..486d6d2ff8a0
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-platform-intel-ifs
@@ -0,0 +1,39 @@
+What:		/sys/devices/virtual/misc/intel_ifs_<N>/run_test
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	Write <cpu#> to trigger IFS test for one online core.
+		Note that the test is per core. The cpu# can be
+		for any thread on the core. Running on one thread
+		completes the test for the core containing that thread.
+		Example: to test the core containing cpu5: echo 5 >
+		/sys/devices/platform/intel_ifs.<N>/run_test
+
+What:		/sys/devices/virtual/misc/intel_ifs_<N>/status
+Date:		April 21 2022
+KernelVersion:	5.19
+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/virtual/misc/intel_ifs_<N>/details
+Date:		April 21 2022
+KernelVersion:	5.19
+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/virtual/misc/intel_ifs_<N>/image_version
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	Version (hexadecimal) of loaded IFS binary image. If no scan image
+		is loaded reports "none".
+
+What:		/sys/devices/virtual/misc/intel_ifs_<N>/reload
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@...el.com>
+Description:	Write "1" (or "y" or "Y") to reload the IFS image from
+		/lib/firmware/intel/ifs/ff-mm-ss.scan.
-- 
2.35.1