diff options
| -rw-r--r-- | include/hw/qdev-core.h | 24 | ||||
| -rw-r--r-- | softmmu/qdev-monitor.c | 7 |
2 files changed, 30 insertions, 1 deletions
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index bafc311bfa..762f9584dd 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -264,6 +264,7 @@ struct BusState { HotplugHandler *hotplug_handler; int max_index; bool realized; + bool full; int num_children; /* @@ -798,6 +799,29 @@ static inline bool qbus_is_hotpluggable(BusState *bus) return bus->hotplug_handler; } +/** + * qbus_mark_full: Mark this bus as full, so no more devices can be attached + * @bus: Bus to mark as full + * + * By default, QEMU will allow devices to be plugged into a bus up + * to the bus class's device count limit. Calling this function + * marks a particular bus as full, so that no more devices can be + * plugged into it. In particular this means that the bus will not + * be considered as a candidate for plugging in devices created by + * the user on the commandline or via the monitor. + * If a machine has multiple buses of a given type, such as I2C, + * where some of those buses in the real hardware are used only for + * internal devices and some are exposed via expansion ports, you + * can use this function to mark the internal-only buses as full + * after you have created all their internal devices. Then user + * created devices will appear on the expansion-port bus where + * guest software expects them. + */ +static inline void qbus_mark_full(BusState *bus) +{ + bus->full = true; +} + void device_listener_register(DeviceListener *listener); void device_listener_unregister(DeviceListener *listener); diff --git a/softmmu/qdev-monitor.c b/softmmu/qdev-monitor.c index a304754ab9..0705f00846 100644 --- a/softmmu/qdev-monitor.c +++ b/softmmu/qdev-monitor.c @@ -435,7 +435,12 @@ static DeviceState *qbus_find_dev(BusState *bus, char *elem) static inline bool qbus_is_full(BusState *bus) { - BusClass *bus_class = BUS_GET_CLASS(bus); + BusClass *bus_class; + + if (bus->full) { + return true; + } + bus_class = BUS_GET_CLASS(bus); return bus_class->max_dev && bus->num_children >= bus_class->max_dev; } |