Add support for HSA_OVERRIDE_GFX_VERSION env var

Change-Id: Iab75cbbba7da654dbf56f4206900d9c2ff5e4565

rocm_agent_enumerator

@@ -209,9 +209,28 @@ def readFromKFD():
               if search_result is not None:
                 device_id = int(search_result.group(0).split(' ')[1], 10)
                 if device_id != 0:
-                  major_ver = int((device_id / 10000) % 100)
-                  minor_ver = int((device_id / 100) % 100)
-                  stepping_ver = int(device_id % 100)
+                  gfx_override = os.environ.get("HSA_OVERRIDE_GFX_VERSION")
+                  if gfx_override is not None:
+                    try:
+                        override_tokens = gfx_override.split('.')
+                        major_ver=int(override_tokens[0])
+                        minor_ver=int(override_tokens[1])
+                        stepping_ver=int(override_tokens[2])
+                        if major_ver > 63 or minor_ver > 255 or stepping_ver > 255:
+                            print('Invalid HSA_OVERRIDE_GFX_VERSION value')
+                            major_ver=0
+                            minor_ver=0
+                            stepping_ver=0
+                    except Exception as e:
+                        print('Invalid HSA_OVERRIDE_GFX_VERSION format expected \"1.2.3\"')
+                        major_ver=0
+                        minor_ver=0
+                        stepping_ver=0
+                  else:
+                    major_ver = int((device_id / 10000) % 100)
+                    minor_ver = int((device_id / 100) % 100)
+                    stepping_ver = int(device_id % 100)
+
                   target_list.append("gfx" + format(major_ver, 'd') + format(minor_ver, 'x') + format(stepping_ver, 'x'))
               line = f.readline()