linux-kernel - Re: [PATCH] irqchip: Skip contexts other supervisor in plic

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Date:   Wed, 23 Oct 2019 18:30:19 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Palmer Dabbelt <palmer@...ive.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>, alan.mikhak@...ive.com,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        tglx@...utronix.de, jason@...edaemon.net, maz@...nel.org,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH] irqchip: Skip contexts other supervisor in plic_init()

On Wed, Oct 23, 2019 at 03:07:10PM -0700, Palmer Dabbelt wrote:
> > > +		/* skip contexts other than supervisor external interrupt */
> > > +		if (parent.args[0] != IRQ_S_EXT)
> > >  			continue;
> > 
> > Will this need to change for RISC-V M-mode Linux support?
> > 
> > https://lore.kernel.org/linux-riscv/20191017173743.5430-1-hch@lst.de/
> 
> Yes.

For M-mode we'll want to check IRQ_M_EXT above.  So we should just
merge this patch ASAP and then for my rebased M-mode series I'll
fix the check to do that for the M-Mode case, which is much cleaner
than my hack.