ifs: add 7 ifs 0 mode function test cases

Add 7 ifs 0 mode function test cases.

Signed-off-by: Pengfei Xu <[email protected]>

README.md

@@ -14,6 +14,7 @@ More details please refer to following.
   * [Intel_PT](pt/README.md)
   * [UMIP(User-Mode Instruction Prevention)](umip/README.md)
   * [xsave](xsave/README.md)
+  * [IFS(In Field Scan)](ifs/README.md)
 
 # Compile from sources
 

ifs/README.md

@@ -0,0 +1,40 @@
+# IFS(In Field Scan) Test Cases
+
+## Description
+```
+IFS old name is SAF(Scan At Field ), now the old feature name "SAF" will not be
+used anymore and use the name "IFS" instead.
+IFS is a feature which allows software to periodically test for latent faults
+in non-array portions of the Core.
+```
+
+## Usage
+make
+```
+./ifs_tests.sh -m 0 -p all -n load_ifs
+It loads ifs driver with ifs mode 0 without any exceptions.
+
+./ifs_tests.sh -m 0 -p all -b 1 -n ifs_batch
+It loads ifs batch 1 blob file with ifs mode 0 without any exceptions.
+Blob file is located in /lib/firmware/intel/ifs_0/ff-mm-ss-01.scan
+Please check "cat /proc/cpuinfo | head" output
+ff means "cpu family" number in hexadecimal.
+mm means "model" number in hexadecimal.
+ss means "stepping" number in hexadecimal.
+01 means batch 01.
+
+./ifs_tests.sh -m 0 -p all -b 1 -n legacy_twice_run
+It loads batch 1 and executes ifs_0 scan twice in all cpus.
+
+./ifs_tests.sh -m 0 -p all -b 2 -n legacy_twice_run
+It loads batch 2 and executes ifs_0 scan twice in all cpus.
+
+./ifs_tests.sh -m 0 -p all -b 3 -n legacy_twice_run
+It loads batch 3 and executes ifs_0 scan twice in all cpus.
+
+./ifs_tests.sh -m 0 -p all -b 1 -n img_version
+It will check image version output is same as MSR output.
+
+./ifs_tests.sh -m 0 -p all -b 1 -n reload_ifs
+It tests reloading the ifs module without issue.
+```