vfio/ccw: get irqs info and set the eventfd fd
vfio-ccw resorts to the eventfd mechanism to communicate with userspace. We fetch the irqs info via the ioctl VFIO_DEVICE_GET_IRQ_INFO, register a event notifier to get the eventfd fd which is sent to kernel via the ioctl VFIO_DEVICE_SET_IRQS, then we can implement read operation once kernel sends the signal. Reviewed-by: NEric Auger <eric.auger@redhat.com> Acked-by: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NDong Jia Shi <bjsdjshi@linux.vnet.ibm.com> Message-Id: <20170517004813.58227-10-bjsdjshi@linux.vnet.ibm.com> Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
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