linux-kernel - Re: [PATCH] arm64: dts: exynos: correct GIC CPU interfaces address range on Exynos7

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Date:   Thu, 5 Aug 2021 09:36:47 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Alim Akhtar <alim.akhtar@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Pankaj Dubey <pankaj.dubey@...sung.com>,
        Sam Protsenko <semen.protsenko@...aro.org>,
        Marc Zyngier <maz@...nel.org>
Subject: Re: [PATCH] arm64: dts: exynos: correct GIC CPU interfaces address
 range on Exynos7

On 05/08/2021 09:21, Krzysztof Kozlowski wrote:
> The GIC-400 CPU interfaces address range is defined as 0x2000-0x3FFF (by
> ARM).
> 

I underestimated the issue - this is actually bug as there is a GICC_DIR
register at offset 0x1000. Therefore:

Fixes: b9024cbc937d ("arm64: dts: Add initial device tree support for exynos7")

> Reported-by: Sam Protsenko <semen.protsenko@...aro.org>
> Reported-by: Marc Zyngier <maz@...nel.org>
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
> ---
>  arch/arm64/boot/dts/exynos/exynos7.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/exynos/exynos7.dtsi b/arch/arm64/boot/dts/exynos/exynos7.dtsi
> index 8b06397ba6e7..c73a597ca66e 100644
> --- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
> +++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi
> @@ -137,7 +137,7 @@ gic: interrupt-controller@...01000 {
>  			#address-cells = <0>;
>  			interrupt-controller;
>  			reg =	<0x11001000 0x1000>,
> -				<0x11002000 0x1000>,
> +				<0x11002000 0x2000>,
>  				<0x11004000 0x2000>,
>  				<0x11006000 0x2000>;
>  		};
> 


Best regards,
Krzysztof