diff options
| -rw-r--r-- | hw/acpi/vmgenid.c | 8 | ||||
| -rw-r--r-- | include/hw/acpi/vmgenid.h | 1 |
2 files changed, 9 insertions, 0 deletions
diff --git a/hw/acpi/vmgenid.c b/hw/acpi/vmgenid.c index c3ddcc8..a32b847 100644 --- a/hw/acpi/vmgenid.c +++ b/hw/acpi/vmgenid.c @@ -221,6 +221,14 @@ static void vmgenid_realize(DeviceState *dev, Error **errp) return; } + /* Given that this function is executing, there is at least one VMGENID + * device. Check if there are several. + */ + if (!find_vmgenid_dev()) { + error_setg(errp, "at most one %s device is permitted", VMGENID_DEVICE); + return; + } + qemu_register_reset(vmgenid_handle_reset, vms); } diff --git a/include/hw/acpi/vmgenid.h b/include/hw/acpi/vmgenid.h index 8578476..7beb959 100644 --- a/include/hw/acpi/vmgenid.h +++ b/include/hw/acpi/vmgenid.h @@ -24,6 +24,7 @@ typedef struct VmGenIdState { bool write_pointer_available; } VmGenIdState; +/* returns NULL unless there is exactly one device */ static inline Object *find_vmgenid_dev(void) { return object_resolve_path_type("", VMGENID_DEVICE, NULL); |