linux-kernel - Re: [RFC PATCH 19/33] irqchip/gic-v3-its: Add VLPI configuration handling

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Date:   Mon, 13 Feb 2017 11:38:43 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Marc Zyngier <marc.zyngier@....com>
cc:     linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.cs.columbia.edu,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Jason Cooper <jason@...edaemon.net>,
        Eric Auger <eric.auger@...hat.com>
Subject: Re: [RFC PATCH 19/33] irqchip/gic-v3-its: Add VLPI configuration
 handling

On Tue, 17 Jan 2017, Marc Zyngier wrote:

> When a VLPI is reconfigured (enabled, disabled, change in priority),
> the full configuration byte must be written, and the caches invalidated.
> 
> Also, when using the irq_mask/irq_unmask methods, it is necessary
> to disable the doorbell for that particular interrupt (by mapping it
> to 1023) on top of clearing the Enable bit.
> 
> Signed-off-by: Marc Zyngier <marc.zyngier@....com>

Aside of the switch/case part:

Reviewed-by: Thomas Gleixner <tglx@...utronix.de>