configs: Added list types of replacement policy.

Replacement policy is one of the key points in CPU performance. For ease
of checking the avliable replacment types for any cpu architects,
"replacment policy list" is added in Options.py and ObjectList.py.
Just like Branch Prediction Policies, adding such list would make it efficient for compare cpu performance
regarding different replacment policies especially for Cache.

Jira Issue: https://gem5.atlassian.net/browse/GEM5-853

Change-Id: I97358617038fdcec79fa7e59baba8926284727b4
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/39195
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

configs/common/ObjectList.py

@@ -162,7 +162,7 @@ class EnumList(ObjectList):
             if not key.startswith("Num_"):
                 self._sub_classes[key] = value
 
-
+rp_list = ObjectList(getattr(m5.objects, 'BaseReplacementPolicy', None))
 bp_list = ObjectList(getattr(m5.objects, 'BranchPredictor', None))
 cpu_list = CPUList(getattr(m5.objects, 'BaseCPU', None))
 hwp_list = ObjectList(getattr(m5.objects, 'BasePrefetcher', None))

configs/common/Options.py

@@ -68,6 +68,10 @@ def _listHWPTypes(option, opt, value, parser):
     ObjectList.hwp_list.print()
     sys.exit(0)
 
+def _listRPTypes(option, opt, value, parser):
+    ObjectList.rp_list.print()
+    sys.exit(0)
+
 def _listIndirectBPTypes(option, opt, value, parser):
     ObjectList.indirect_bp_list.print()
     sys.exit(0)
@@ -186,6 +190,11 @@ def addCommonOptions(parser):
     parser.add_option("--indirect-bp-type", type="choice", default=None,
                       choices=ObjectList.indirect_bp_list.get_names(),
                       help = "type of indirect branch predictor to run with")
+
+    parser.add_option("--list-rp-types",
+                      action="callback", callback=_listRPTypes,
+                      help="List available replacement policy types")
+
     parser.add_option("--list-hwp-types",
                       action="callback", callback=_listHWPTypes,
                       help="List available hardware prefetcher types")