This machine correctly defines its default_cpu_type to cortex-m3 and report an error if the user requested another cpu_type, however it does not exit, and this can confuse users trying to use another core:
$ qemu-system-arm -M emcraft-sf2 -cpu cortex-m4 -kernel test-m4.elf qemu-system-arm: This board can only be used with CPU cortex-m3-arm-cpu [output related to M3 core ...] The CPU is indeed a M3 core: (qemu) info qom-tree /machine (emcraft-sf2-machine) /unattached (container) /device[0] (msf2-soc) /armv7m (armv7m) /cpu (cortex-m3-arm-cpu) Add the missing exit() call to return to the shell. Signed-off-by: Philippe Mathieu-Daudé <phi...@redhat.com> --- hw/arm/msf2-som.c | 1 + 1 file changed, 1 insertion(+) diff --git a/hw/arm/msf2-som.c b/hw/arm/msf2-som.c index 8c550a8bdd..2c9984bb3b 100644 --- a/hw/arm/msf2-som.c +++ b/hw/arm/msf2-som.c @@ -53,6 +53,7 @@ static void emcraft_sf2_s2s010_init(MachineState *machine) if (strcmp(machine->cpu_type, mc->default_cpu_type) != 0) { error_report("This board can only be used with CPU %s", mc->default_cpu_type); + exit(1); } memory_region_init_ram(ddr, NULL, "ddr-ram", DDR_SIZE, -- 2.20.1