This patch set has been sitting around for a while, but it got a bit lost in the shuffle. In RISC-V land we currently couple do_IRQ (the C entry point for interrupt handling) to our first-level interrupt controller. While this isn't completely crazy (as the first-level interrupt controller is specified by the ISA), it is a bit awkward.
This patch set decouples our trap handler from our first-level IRQ chip driver by copying what a handful of other architectures are doing. This does add an additional load to the interrupt handling path, but there's a handful of performance problems in there that I've been meaning to look at so I don't mind adding another one for now. The advantage is that our irqchip driver is decoupled from our arch port, at least at compile time.
