configs: Add option for mem type for GPUFS

The user will likely want to be able to specify a different type of
memory for the GPU rather than using the same default for the CPU. Add
the option to do that.

Change-Id: I62c22f6283335c3ca3df355f8ecc4bbffa751a73
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/58390
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/example/gpufs/runfs.py

@@ -82,7 +82,9 @@ def addRunFSOptions(parser):
                         "  size")
     parser.add_argument("--dgpu-num-dirs", type=int, default=1, help="Set "
                         "the number of dGPU directories (memory controllers")
-
+    parser.add_argument("--dgpu-mem-type", default="HBM_1000_4H_1x128",
+                        choices=ObjectList.mem_list.get_names(),
+                        help="type of memory to use")
 
 def runGpuFSSystem(args):
     '''

configs/ruby/GPU_VIPER.py

@@ -518,7 +518,7 @@ def construct_gpudirs(options, system, ruby_system, network):
         dir_cntrl.responseFromMemory = MessageBuffer()
 
         # Create memory controllers too
-        mem_type = ObjectList.mem_list.get(options.mem_type)
+        mem_type = ObjectList.mem_list.get(options.dgpu_mem_type)
         dram_intf = MemConfig.create_mem_intf(mem_type, gpu_mem_range, i,
             int(math.log(options.dgpu_num_dirs, 2)), options.cacheline_size,
             xor_low_bit)