On Tue, Apr 26, 2022, Varad Gautam wrote: > + printf("smp: waiting for %d APs\n", _cpu_count - 1); Oof, this breaks run_test.sh / runtime.bash. runtime.bash has a godawful hack to detect that dummy.efi ran cleanly; it looks for "enabling apic" as the last line to detect success. I'll add a patch to fix this by having dummy.c print an explicit magic string, e.g. Dummy Hello World!.