linux-kernel - Re: [PATCH v2 1/2] dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property

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Message-ID: <169399939583.992143.8154908772821151447.robh@kernel.org>
Date:   Wed, 6 Sep 2023 06:23:16 -0500
From:   Rob Herring <robh@...nel.org>
To:     Lorenzo Pieralisi <lpieralisi@...nel.org>
Cc:     Fang Xiang <fangxiang3@...omi.com>, Marc Zyngier <maz@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCH v2 1/2] dt-bindings: interrupt-controller: arm,gic-v3:
 Add dma-noncoherent property


On Wed, 06 Sep 2023 11:41:38 +0200, Lorenzo Pieralisi wrote:
> The GIC v3 specifications allow redistributors and ITSes interconnect
> ports used to access memory to be wired up in a way that makes the
> respective initiators/memory observers non-coherent.
> 
> Add the standard dma-noncoherent property to the GICv3 bindings to
> allow firmware to describe the redistributors/ITSes components and
> interconnect ports behaviour in system designs where the redistributors
> and ITSes are not coherent with the CPU.
> 
> Signed-off-by: Lorenzo Pieralisi <lpieralisi@...nel.org>
> Cc: Rob Herring <robh@...nel.org>
> ---
>  .../bindings/interrupt-controller/arm,gic-v3.yaml    | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 

Reviewed-by: Rob Herring <robh@...nel.org>