This enables support for hardware-assisted userspace hardirq masking. SH-4A and newer interrupt blocks all support a special shadowed page with all non-masking registers obscured when mapped in to userspace. This is primarily for use by userspace device drivers that are using special priority levels. If in doubt, say N.
This enables support for IRQ auto-distribution mode on SH-X3 SMP parts. All of the balancing and CPU wakeup decisions are taken care of automatically by hardware for distributed vectors. If in doubt, say N.
This will create a debugfs entry for showing the relationship between system IRQs and the per-controller id tables. If in doubt, say N.