Support running games on Asahi Linux

In Asahi Linux, since the host operates with 16K pages, x86_64
software needs to run in a 4K page microVM managed by muvm [1].

In practice, this means faugus-launcher can normally on the host,
but faugus-run needs to run through muvm to ensure it operates in
within the context of the microVM.

This can be easily achieved by having faugus-run to re-exec itself
under muvm when running under Asahi Linux. This doesn't have an
impact on non-Asahi systems, other than the cost of checking the
DT to identify the machine type which should be unnoticiable.

[1] https://docs.fedoraproject.org/en-US/fedora-asahi-remix/x86-support/

Signed-off-by: Sergio Lopez <slp@sinrega.org>

faugus_run.py

@@ -10,6 +10,7 @@ import time
 import shlex
 import gettext
 import signal
+import shutil
 
 gi.require_version("Gtk", "3.0")
 
@@ -798,7 +799,31 @@ def update_games_and_config():
     if changed:
         config_path.write_text("\n".join(new_lines) + "\n", encoding="utf-8")
 
+def is_apple_silicon():
+    path = "/proc/device-tree/compatible"
+
+    if not os.path.exists(path):
+        return False
+
+    try:
+        with open(path, "rb") as f:
+            dtcompat = f.read().decode('utf-8', errors='ignore')
+
+            if "apple,arm-platform" in dtcompat:
+                return True
+            else:
+                return False
+    except:
+        return False
+
 def main():
+    if is_apple_silicon() and 'FAUGUS_MUVM' not in os.environ:
+        muvm_path = shutil.which('muvm')
+        if muvm_path:
+            env = os.environ.copy()
+            args = [muvm_path, "-i", "-e", "FAUGUS_MUVM=1", sys.executable, os.path.abspath(__file__)]
+            os.execvpe(muvm_path, args + sys.argv[1:], env)
+
     apply_dark_theme()
     update_games_and_config()