Device instance to test mapping intel_ifs_0 -> Scan Test intel_ifs_1 -> Array BIST test What: /sys/devices/virtual/misc/intel_ifs_/run_test Date: Nov 16 2022 KernelVersion: 6.2 Contact: "Jithu Joseph" Description: Write 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_/run_test Devices: all What: /sys/devices/virtual/misc/intel_ifs_/status Date: Nov 16 2022 KernelVersion: 6.2 Contact: "Jithu Joseph" 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_/details Date: Nov 16 2022 KernelVersion: 6.2 Contact: "Jithu Joseph" 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_/image_version Date: Nov 16 2022 KernelVersion: 6.2 Contact: "Jithu Joseph" 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_/current_batch Date: Nov 16 2022 KernelVersion: 6.2 Contact: "Jithu Joseph" 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_/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