cpu-o3: Make the smtFetchPolicy a Param.ScopedEnum

The smtFetchPolicy is a parameter in the o3 cpu that can have 5
different values. Previously this setting was done through a string
and a parser function would turn it into a c++ enum value. This
changeset turns the string into a python Param.ScopedEnum.

Change-Id: Iafb4b4b27587541185ea912e5ed581bce09695f5
Signed-off-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/15396
Reviewed-by: Anthony Gutierrez <anthony.gutierrez@amd.com>
Maintainer: Anthony Gutierrez <anthony.gutierrez@amd.com>

1 files changed, 2 insertions, 8 deletions

diff --git a/src/cpu/o3/deriv.cc b/src/cpu/o3/deriv.cc
index 6b2af76e0..e8ff66913 100644
--- a/src/cpu/o3/deriv.cc
+++ b/src/cpu/o3/deriv.cc
@@ -57,14 +57,8 @@ DerivO3CPUParams::create()
 
     numThreads = actual_num_threads;
 
-    // Default smtFetchPolicy to "RoundRobin", if necessary.
-    std::string round_robin_policy = "RoundRobin";
-    std::string single_thread = "SingleThread";
-
-    if (actual_num_threads > 1 && single_thread.compare(smtFetchPolicy) == 0)
-        smtFetchPolicy = round_robin_policy;
-    else
-        smtFetchPolicy = smtFetchPolicy;
+    if (actual_num_threads > 1 && smtFetchPolicy == FetchPolicy::SingleThread)
+        smtFetchPolicy = FetchPolicy::RoundRobin;
 
     return new DerivO3CPU(this);
 }