How to separate the interrupts between different worlds

[cnan123]

For example, there are 2 worlds run on supervisor mode, if currently run world0, then a interrupt belong to world occur, how to handler it, and also how to assign the interrupt to different world ?

[gagachang]

@cnan123 I think you can refer Smsdia extension defined in riscv-smmtt repo.

[yloisel]

On products that support Smmtt, linking WIDs with SDIDs and using Smsdia can be a way to address this concern.
On products that don't support Smmtt, several options:

• all interrupts are managed in M-mode and then redirected to S-mode
• current S-mode domain interrupts are delegated to S-mode while other S-mode domains' interrupts are handled in S-mode and at domain switch, this is reconfigured