You can generate interrupt to host system using the user interrupt interface. You need to
provide usr_irq_in_fnc, usr_irq_in_vec, and
usr_irq_in_vld interrupts and they should be held active until
usr_irq_out_ack is returned. usr_irq_in_fnc is a
function number associated with an interrupt. If it is for MSI-X interrupt
usr_irq_in_vec should be provided. If the interrupt is for legacy
interrupt, vector is not needed.
Figure 1.
Interrupt
