Delegate to Supervisor Mode Interrupts

Archive Freedom U500
1

U54 Manual written,

6.4 Supervisor Mode Interrupts
The U54-MC supports the ability to selectively direct interrupts and exceptions to supervisormode,
resulting in improved performance by eliminating the need for additional mode changes.

But actually,
real hardware interrupt is PLIC(meip) and mtime(mtip) only.
Both (real)interrutpt is send to M-mode.
So, to delegate those to S-mode, M-mode support software required.

It’s true? or the way to delegate without M-mode support software?

2

I solved by other forum’s topic.
Thanks.