sysbus: add irq_routing_notifier
Add a new connect_irq_notifier notifier in the SysBusDeviceClass. This notifier, if populated, is called after sysbus_connect_irq. This mechanism is used to setup VFIO signaling once VFIO platform devices get attached to their platform bus, on a machine init done notifier. Signed-off-by: NEric Auger <eric.auger@linaro.org> Reviewed-by: NPeter Crosthwaite <peter.crosthwaite@xilinx.com> Tested-by: NVikram Sethi <vikrams@codeaurora.org> Reviewed-by: NPeter Maydell <peter.maydell@linaro.org> Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>
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