Meta/run.py: Bring back SERENITY_EXTRA_QEMU_ARGS

Author: https://github.com/Hendiadyoin1
Commit: https://github.com/SerenityOS/serenity/commit/b2377f1f9c
Pull-request: https://github.com/SerenityOS/serenity/pull/24141
Reviewed-by: https://github.com/ADKaster ✅

Meta/run.py

@@ -18,6 +18,7 @@ from pathlib import Path
 from shutil import which
 from subprocess import run
 from typing import Any, Callable, Literal
+import shlex
 
 QEMU_MINIMUM_REQUIRED_MAJOR_VERSION = 6
 QEMU_MINIMUM_REQUIRED_MINOR_VERSION = 2
@@ -826,6 +827,8 @@ def assemble_arguments(config: Configuration) -> list[str | Path]:
         boch_src = Path(config.serenity_src or ".", "Meta/bochsrc")
         return [config.bochs_binary, "-q", "-f", boch_src]
 
+    passed_qemu_args = shlex.split(environ.get("SERENITY_EXTRA_QEMU_ARGS", ""))
+
     return [
         config.qemu_binary or "",
         # Deviate from standard order here:
@@ -851,6 +854,7 @@ def assemble_arguments(config: Configuration) -> list[str | Path]:
         *config.network_default_arguments,
         *config.boot_drive_arguments,
         *config.character_device_arguments,
+        *passed_qemu_args,
     ]