configs: Add simple check for valid GPU MMIO trace

This file is a required input to the simulator for GPUFS. There seems to
be confusion from several users who are not providing this input. This
usually results in the amdgpu driver failing to load, leading to the
application under test exiting along with it.

This changeset adds a simple md5 hashsum check to compare against the
known good MMIO trace located in the gem5-resources repository.

Change-Id: I59819fc795a6bc4bc6badbd4d120db1246498987
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/69978
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>

configs/example/gpufs/runfs.py

@@ -30,6 +30,7 @@
 # System includes
 import argparse
 import math
+import hashlib
 
 # gem5 related
 import m5
@@ -145,6 +146,11 @@ def runGpuFSSystem(args):
         math.ceil(float(n_cu) / args.cu_per_scalar_cache)
     )
 
+    # Verify MMIO trace is valid
+    mmio_md5 = hashlib.md5(open(args.gpu_mmio_trace, "rb").read()).hexdigest()
+    if mmio_md5 != "c4ff3326ae8a036e329b8b595c83bd6d":
+        m5.util.panic("MMIO file does not match gem5 resources")
+
     system = makeGpuFSSystem(args)
 
     root = Root(