Do not rely on Vivado to tie off interrupt pins
Currently only the upper 4 interrupts are tied off or connected. All the following interrupts depend on the uArch interrupt signals and don't have specific tie-offs. Vivado will output a Critical Warning such as:
CRITICAL WARNING: [BD 41-759] The input pins (listed below) are either not connected or do not have a source port, and they don't have a tie-off specified. These pins are tied-off to all 0's to avoid error in Implementation flow. Please check your design and connect them as needed: /InterruptControl/interrupt_concat/In5 /InterruptControl/interrupt_concat/In6 /InterruptControl/interrupt_concat/In7
This behavior is desired right now but tie-offs should be explicitly defined to avoid problems with future tool versions.