Re: [PATCH v2 3/5] irqchip: RISC-V Local Interrupt Controller Driver

[Christoph Hellwig]

On Mon, Sep 10, 2018 at 03:45:42PM +0200, Thomas Gleixner wrote:
> > He has an irqchip that is called from the RISC-V exception handler
> > when the interrupt flag is set in scause and then dispatches to one
> > of:  IPI, timer, actual irqchip.
> 
> So the per cpu timer is the only per cpu interrupt and that thing is used
> unconditionally, right?

Yes.  external is chained and IPI is still handled explicitly.