linux-kernel - Re: [PATCH v2 3/9] irqchip: irq-renesas-rzg2l: Skip mapping NMI interrupt as part of hierarchy domain

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Message-ID: <CA+V-a8vb-PfzMWX=ndF8nsyYVbkfYBkAQZ-UoS9zpQPndL871Q@mail.gmail.com>
Date:   Thu, 22 Dec 2022 11:52:19 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Marc Zyngier <maz@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-gpio@...r.kernel.org,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v2 3/9] irqchip: irq-renesas-rzg2l: Skip mapping NMI
 interrupt as part of hierarchy domain

Hi Marc, Geert,

On Wed, Dec 21, 2022 at 10:31 AM Marc Zyngier <maz@...nel.org> wrote:
>
> On Wed, 21 Dec 2022 00:02:36 +0000,
> Prabhakar <prabhakar.csengg@...il.com> wrote:
> >
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> >
> > NMI interrupt is not an external interrupt as compared to the IRQ0-7 and
> > TINT0-31, this means we need to install the irq handler for NMI in the
> > IRQC driver and not include it as part of IRQ domain.
> >
> > This patch skips mapping NMI interrupt as part of the IRQ domain
> > hierarchy.
>
> Does it mean nobody can connect anything to it? Where is the handler
> you're mentioning for this NMI?
>
I got this clarified internally the NMI interrupt is an external
interrupt just like the other IRQ0-7/TINT interrupts. I'll drop this
patch in the next version.

Cheers,
Prabhakar