diff options
| -rw-r--r-- | hw/display/vga-isa.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/hw/display/vga-isa.c b/hw/display/vga-isa.c index 90851e730b..8cea84f2be 100644 --- a/hw/display/vga-isa.c +++ b/hw/display/vga-isa.c @@ -33,6 +33,7 @@ #include "hw/loader.h" #include "hw/qdev-properties.h" #include "qom/object.h" +#include "qapi/error.h" #define TYPE_ISA_VGA "isa-vga" OBJECT_DECLARE_SIMPLE_TYPE(ISAVGAState, ISA_VGA) @@ -61,6 +62,15 @@ static void vga_isa_realizefn(DeviceState *dev, Error **errp) MemoryRegion *vga_io_memory; const MemoryRegionPortio *vga_ports, *vbe_ports; + /* + * make sure this device is not being added twice, if so + * exit without crashing qemu + */ + if (object_resolve_path_type("", TYPE_ISA_VGA, NULL)) { + error_setg(errp, "at most one %s device is permitted", TYPE_ISA_VGA); + return; + } + s->global_vmstate = true; vga_common_init(s, OBJECT(dev)); s->legacy_address_space = isa_address_space(isadev); |