BalloonInfo *qmp_query_balloon(Error **errp) { BalloonInfo *info; if (kvm_enabled() && !kvm_has_sync_mmu()) { error_set(errp, QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon"); return NULL; } info = g_malloc0(sizeof(*info)); if (qemu_balloon_status(info) == 0) { error_set(errp, QERR_DEVICE_NOT_ACTIVE, "balloon"); qapi_free_BalloonInfo(info); return NULL; } return info; }