tests: Use more representative configs for ARM tests

This patch changes the CPU and cache configurations used in the ARM SE and FS
regressions to make them more representative, and also get better code
coverage by exercising different replacement policies and use an L2
prefetcher.

tests/configs/arm_generic.py

@@ -43,6 +43,25 @@ m5.util.addToPath('../configs/common')
 import FSConfig
 from Caches import *
 from base_config import *
+from O3_ARM_v7a import *
+
+class ArmSESystemUniprocessor(BaseSESystemUniprocessor):
+    """Syscall-emulation builder for ARM uniprocessor systems.
+
+    A small tweak of the syscall-emulation builder to use more
+    representative cache configurations.
+    """
+
+    def __init__(self, **kwargs):
+        BaseSESystem.__init__(self, **kwargs)
+
+    def create_caches_private(self, cpu):
+        # The atomic SE configurations do not use caches
+        if self.mem_mode == "timing":
+            # Use the more representative cache configuration
+            cpu.addTwoLevelCacheHierarchy(O3_ARM_v7a_ICache(),
+                                          O3_ARM_v7a_DCache(),
+                                          O3_ARM_v7aL2())
 
 class LinuxArmSystemBuilder(object):
     """Mix-in that implements create_system.
@@ -87,6 +106,12 @@ class LinuxArmFSSystem(LinuxArmSystemBuilder,
         BaseSystem.__init__(self, **kwargs)
         LinuxArmSystemBuilder.__init__(self, machine_type)
 
+    def create_caches_private(self, cpu):
+        # Use the more representative cache configuration
+        cpu.addTwoLevelCacheHierarchy(O3_ARM_v7a_ICache(),
+                                      O3_ARM_v7a_DCache(),
+                                      O3_ARM_v7aL2())
+
 class LinuxArmFSSystemUniprocessor(LinuxArmSystemBuilder,
                                    BaseFSSystemUniprocessor):
     """Basic ARM full system builder for uniprocessor systems.
@@ -100,7 +125,6 @@ class LinuxArmFSSystemUniprocessor(LinuxArmSystemBuilder,
         BaseFSSystemUniprocessor.__init__(self, **kwargs)
         LinuxArmSystemBuilder.__init__(self, machine_type)
 
-
 class LinuxArmFSSwitcheroo(LinuxArmSystemBuilder, BaseFSSwitcheroo):
     """Uniprocessor ARM system prepared for CPU switching"""
 

tests/configs/o3-timing.py

@@ -39,7 +39,17 @@
 # Authors: Andreas Hansson
 
 from m5.objects import *
+from m5.defines import buildEnv
 from base_config import *
+from arm_generic import *
+from O3_ARM_v7a import O3_ARM_v7a_3
 
-root = BaseSESystemUniprocessor(mem_mode='timing', mem_class=DDR3_1600_x64,
+# If we are running ARM regressions, use a more sensible CPU
-                                cpu_class=DerivO3CPU).create_root()
+# configuration. This makes the results more meaningful, and also
+# increases the coverage of the regressions.
+if buildEnv['TARGET_ISA'] == "arm":
+    root = ArmSESystemUniprocessor(mem_mode='timing', mem_class=DDR3_1600_x64,
+                                   cpu_class=O3_ARM_v7a_3).create_root()
+else:
+    root = BaseSESystemUniprocessor(mem_mode='timing', mem_class=DDR3_1600_x64,
+                                   cpu_class=DerivO3CPU).create_root()