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

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Message-ID: <alpine.DEB.2.21.1809101544560.1292@nanos.tec.linutronix.de>
Date:   Mon, 10 Sep 2018 15:45:42 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Christoph Hellwig <hch@...radead.org>
cc:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Anup Patel <anup@...infault.org>,
        Palmer Dabbelt <palmer@...ive.com>,
        linux-kernel@...r.kernel.org, Atish Patra <atish.patra@....com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Palmer Dabbelt <palmer@...belt.com>,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 3/5] irqchip: RISC-V Local Interrupt Controller
 Driver

On Mon, 10 Sep 2018, Christoph Hellwig wrote:
> On Mon, Sep 10, 2018 at 03:37:31PM +0200, Thomas Gleixner wrote:
> > > > Just a few weeks ago you said the contrary:
> > > > 
> > > > http://lists.infradead.org/pipermail/linux-riscv/2018-August/000943.html
> > > 
> > > Sigh. Yes. Now that you remind me. 
> > 
> > Just for clarification. I had the impression that Anup was trying to wire
> > up more than just the timer interrupt, but that doesn't seem to be the
> > case.
> 
> 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?

Thanks,

	tglx