linux-kernel - Re: [PATCH v2 2/2] irqchip/gic-v2, v3: Prevent SW resends entirely

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Date:   Fri, 31 Jul 2020 13:11:08 +0100
From:   Valentin Schneider <valentin.schneider@....com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>
Subject: Re: [PATCH v2 2/2] irqchip/gic-v2, v3: Prevent SW resends entirely


On 31/07/20 12:27, Marc Zyngier wrote:
>> Look for anything that performs an interrupt allocation by calling
>> into the parent with a 3 cell (DT case) fwspec. There is a bunch
>> of them.
>
> For what it is worth, I have just pushed out a branch[1] containing some
> of this rework as well as your patches.
>

Brilliant, thanks for taking a shot at this! I'll try to look for stragglers.

> The only tricky part is the GICv4.1 doorbell retriggering, which just
> can't be re-injected. It shouldn't matter though. Same for vSGIs, they
> never fire on the host.
>
> Thanks,
>
>          M.
>
> [1]
> https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=irq/gic-retrigger