The Interrupts modes in the following section applies to DMA/Bridge Subsystem for PCIe in Bridge Mode only. For AXI Bridge for PCIe Gen3, go to the previous section.
Multiple interrupt modes can be configured during IP configuration, however only
one interrupt mode is used at runtime. If multiple interrupt modes are enabled by the
host after PCI bus enumeration at runtime, MSI-X interrupt takes precedence over MSI
interrupt, and MSI interrupt takes precedence over Legacy interrupt. All of these
interrupt modes are sent using the same usr_irq_*
interface and the core automatically picks the best
available interrupt mode at runtime.