[#59790] ARMv8: Add regression test for checking EL and SS

tests/platforms/ARMv8A.robot

diff --git a/tests/platforms/ARMv8A.robot b/tests/platforms/ARMv8A.robot
index d2dfc73..201afa1 100644
--- a/tests/platforms/ARMv8A.robot
+++ b/tests/platforms/ARMv8A.robot
@@ -55,6 +55,17 @@
     Wait For Log Entry            Read from ${timer_register_name}
 
 *** Test Cases ***
+Should Get Correct EL and SS on CPU Creation
+    # This platform uses `Cortex-A53` CPU - ARMv8A
+    # We only check if EL and SS are reflected correctly on C# side, for their usage in peripherals
+    Create Machine
+
+    ${ss}=                             Execute Command  sysbus.cpu SecurityState
+    ${el}=                             Execute Command  sysbus.cpu ExceptionLevel
+
+    Should Be Equal As Strings         ${ss.split()[0].strip()}  Secure
+    Should Be Equal As Strings         ${el.split()[0].strip()}  EL3_MonitorMode
+
 Test Accessing ARM Generic Timer Registers Through AArch64 System Registers
     Create Machine
     Create Log Tester             0

tests/platforms/ARMv8R.robot

diff --git a/tests/platforms/ARMv8R.robot b/tests/platforms/ARMv8R.robot
index 5be458a..13fc1a2 100644
--- a/tests/platforms/ARMv8R.robot
+++ b/tests/platforms/ARMv8R.robot
@@ -704,6 +704,17 @@
 
 ### Prerequisites
 
+Should Get Correct EL and SS on CPU Creation
+    # This platform uses `Cortex-R52` CPU - ARMv8R in AArch32 configuration
+    # We only check if EL and SS are reflected correctly on C# side, for their usage in peripherals
+    Initialize Emulation
+
+    ${ss}=                             Execute Command  sysbus.cpu SecurityState
+    ${el}=                             Execute Command  sysbus.cpu ExceptionLevel
+
+    Should Be Equal As Strings         ${ss.split()[0].strip()}  NonSecure
+    Should Be Equal As Strings         ${el.split()[0].strip()}  EL2_HypervisorMode
+
 Check Changing Privilege Level From Monitor
     [Template]                         Check Changing Privilege Level From Monitor Template
     [Tags]                             Prerequisite