io/iommu/amd: Add addtional journalctl check for kernel logs

Current code checks dmesg alone for kernel logs. But for cases where
dmesg is cleared, checking journalctl adds more confidence on the outcome
of kernel logs check.

Signed-off-by: Dheeraj Kumar Srivastava <dheerajkumar.srivastava@amd.com>

Author: dhsrivas

io/iommu/amd/iommu_v2pgmode_test.py

@@ -50,7 +50,12 @@ def check_dmesg(string):
     """
     cmd = f'dmesg | grep -i "{string}"'
     output = process.run(cmd, ignore_status=True, shell=True).stdout_text
-    if output != "":
+    if output == "":
+        cmd = f'journalctl -k -b | grep -i "{string}"'
+        output = process.run(cmd, ignore_status=True, shell=True).stdout_text
+        if output != "":
+            return True
+    else:
         return True
     return False