Device instance to test mapping
intel_ifs_0 -> Scan Test
intel_ifs_1 -> Array BIST test
What: /sys/devices/virtual/misc/intel_ifs_<N>/run_test
Date: Nov 16 2022
KernelVersion: 6.2
Contact: "Jithu Joseph" <[email protected]>
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/virtual/misc/intel_ifs_<N>/run_test
Devices: all
What: /sys/devices/virtual/misc/intel_ifs_<N>/status
Date: Nov 16 2022
KernelVersion: 6.2
Contact: "Jithu Joseph" <[email protected]>
Description: The status of the last test. It can be one of "pass", "fail"
or "untested".
Devices: all
What: /sys/devices/virtual/misc/intel_ifs_<N>/details
Date: Nov 16 2022
KernelVersion: 6.2
Contact: "Jithu Joseph" <[email protected]>
Description: Additional information regarding the last test. The details file reports
the hex value of the STATUS MSR for this test. Note that the error_code field
may contain driver defined software code not defined in the Intel SDM.
Devices: all
What: /sys/devices/virtual/misc/intel_ifs_<N>/image_version
Date: Nov 16 2022
KernelVersion: 6.2
Contact: "Jithu Joseph" <[email protected]>
Description: Version (hexadecimal) of loaded IFS test image. If no test image
is loaded reports "none". Only present for device instances where a test image
is applicable.
Devices: intel_ifs_0
What: /sys/devices/virtual/misc/intel_ifs_<N>/current_batch
Date: Nov 16 2022
KernelVersion: 6.2
Contact: "Jithu Joseph" <[email protected]>
Description: Write a number less than or equal to 0xff to load an IFS test image.
The number written treated as the 2 digit suffix in the following file name:
/lib/firmware/intel/ifs_<N>/ff-mm-ss-02x.scan
Reading the file will provide the suffix of the currently loaded IFS test image.
This file is present only for device instances where a test image is applicable.
Devices: intel_ifs_0
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