tests: Don't enable EL2/EL3 in AArch32 for long regressions

This is fixing long regressions, caused by
automatically enabling EL2 and EL3 in Arm.
This is temporary: either fixing EL3 boot in AArch32 or
disabling EL3 in AArch32 should be chosen in the long term

Change-Id: If92b219ff89dcf13916a151fac9a2a3ac0e7d69b
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/59849
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests/gem5/configs/arm_generic.py

@@ -124,6 +124,12 @@ class LinuxArmSystemBuilder(object):
                                         self.machine_type, self.num_cpus,
                                         sc, ruby=self.use_ruby)
 
+        # TODO: This is removing SECURITY and VIRTUALIZATION extensions
+        # from AArch32 runs to fix long regressions. Find a fix or
+        # remove EL3/EL2 support at AArch32
+        if not self.aarch64_kernel:
+            system.release = ArmRelease(extensions=["LPAE"])
+
         # We typically want the simulator to panic if the kernel
         # panics or oopses. This prevents the simulator from running
         # an obviously failed test case until the end of time.