scripts/make_fit: Support a few more parallel compressors

Add support for pbzip2, xz and plzip which can compress in parallel.
This speeds up the ramdisk compression.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Nicolas Schier <nsc@kernel.org>
Link: https://patch.msgid.link/20260106162738.2605574-6-sjg@chromium.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>

scripts/make_fit.py

@@ -50,11 +50,12 @@ import libfdt
 CompTool = collections.namedtuple('CompTool', 'ext,tools')
 
 COMP_TOOLS = {
-    'bzip2': CompTool('.bz2', 'bzip2'),
+    'bzip2': CompTool('.bz2', 'pbzip2,bzip2'),
     'gzip': CompTool('.gz', 'pigz,gzip'),
     'lz4': CompTool('.lz4', 'lz4'),
-    'lzma': CompTool('.lzma', 'lzma'),
+    'lzma': CompTool('.lzma', 'plzip,lzma'),
     'lzo': CompTool('.lzo', 'lzop'),
+    'xz': CompTool('.xz', 'xz'),
     'zstd': CompTool('.zstd', 'zstd'),
 }
 
@@ -207,7 +208,12 @@ def compress_data(inf, compress):
             done = False
             for tool in comp.tools.split(','):
                 try:
-                    subprocess.call([tool, '-c'], stdin=inf, stdout=outf)
+                    # Add parallel flags for tools that support them
+                    cmd = [tool]
+                    if tool in ('zstd', 'xz'):
+                        cmd.extend(['-T0'])  # Use all available cores
+                    cmd.append('-c')
+                    subprocess.call(cmd, stdin=inf, stdout=outf)
                     done = True
                     break
                 except FileNotFoundError: