manual backport of upstream commit
https://gitlab.freedesktop.org/drm/igt-gpu-tools/-/commit/201da47cb57b8fadd9bc45be16b82617b32a2c01

--- a/docs/reference/igt-gpu-tools/generate_description_xml.py
+++ b/docs/reference/igt-gpu-tools/generate_description_xml.py
@@ -4,7 +4,7 @@ import re
 import sys
 import os.path
 import subprocess
-import xml.etree.cElementTree as ET
+import xml.etree.ElementTree as ET
 
 from collections import namedtuple
 
--- a/lib/i915/perf-configs/perf-codegen.py
+++ b/lib/i915/perf-configs/perf-codegen.py
@@ -26,7 +26,7 @@ import os
 import sys
 import textwrap
 
-import xml.etree.cElementTree as et
+import xml.etree.ElementTree as et
 
 import codegen