tests: Add realview64-kvm.py testing platform

Change-Id: If9952563413b4c7462a3ddf46c40358023d5bc60
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/31218
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

tests/gem5/configs/arm_generic.py

@@ -84,10 +84,31 @@ class LinuxArmSystemBuilder(object):
         self.use_ruby = kwargs.get('use_ruby', False)
         self.aarch64_kernel = aarch64_kernel
 
+    def init_kvm(self, system):
+        """Do KVM-specific system initialization.
+
+        Arguments:
+          system -- System to work on.
+        """
+        system.kvm_vm = KvmVM()
+
+        # Arm KVM regressions will use a simulated GIC. This means that in
+        # order to work we need to remove the system interface of the
+        # generic timer from the DTB and we need to inform the MuxingKvmGic
+        # class to use the gem5 GIC instead of relying on the host one
+        GenericTimer.generateDeviceTree = SimObject.generateDeviceTree
+        system.realview.gic.simulate_gic = True
+
     def create_system(self):
         if self.aarch64_kernel:
             gem5_kernel = "vmlinux.arm64"
-            disk_image = "m5_exit.squashfs.arm64"
+            try:
+                if issubclass(self.cpu_class, ArmV8KvmCPU):
+                    disk_image = "m5_exit_addr.squashfs.arm64"
+                else:
+                    disk_image = "m5_exit.squashfs.arm64"
+            except:
+                disk_image = "m5_exit.squashfs.arm64"
         else:
             gem5_kernel = "vmlinux.arm"
             disk_image = "m5_exit.squashfs.arm"

tests/gem5/configs/realview64-kvm.py

@@ -0,0 +1,42 @@
+# Copyright (c) 2020 ARM Limited
+# All rights reserved.
+#
+# The license below extends only to copyright in the software and shall
+# not be construed as granting a license to any other intellectual
+# property including but not limited to intellectual property relating
+# to a hardware implementation of the functionality of the software
+# licensed hereunder.  You may use the software subject to the license
+# terms below provided that you ensure that this notice is replicated
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+from m5.objects import *
+from arm_generic import *
+
+root = LinuxArmFSSystemUniprocessor(mem_mode='atomic_noncaching',
+                                    machine_type='VExpress_GEM5_V1',
+                                    mem_class=SimpleMemory,
+                                    cpu_class=ArmV8KvmCPU).create_root()