linux-kernel - Re: [PATCH 2/4] arm64: dts: Foundation model: increate GICC region to allow EOImode=1

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Message-ID: <561CE00B.3070105@arm.com>
Date:	Tue, 13 Oct 2015 11:42:19 +0100
From:	Marc Zyngier <marc.zyngier@....com>
To:	Andre Przywara <andre.przywara@....com>, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk
CC:	catalin.marinas@....com, will.deacon@....com,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, galak@...eaurora.org,
	drjones@...hat.com
Subject: Re: [PATCH 2/4] arm64: dts: Foundation model: increate GICC region
 to allow EOImode=1

Hi Andre,

s/increate/increase size of/ in the subject line

On 13/10/15 10:37, Andre Przywara wrote:
> Recent commits made the GIC driver use EOImode=1 for all GICs
> that advertise the proper GICC region size.

Well, it is not so much that the kernel uses EOImode=1, but the fact
that the model has a GICv2 implementation, hence a 8kB GICC region.

> To let the model benefit from the blessings of that mode, increase
> the GICC region to its actual size of 8K.
> 
> Signed-off-by: Andre Przywara <andre.przywara@....com>
> ---
>  arch/arm64/boot/dts/arm/foundation-v8.dts | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/arm/foundation-v8.dts b/arch/arm64/boot/dts/arm/foundation-v8.dts
> index 3c5595d..57ad9fe 100644
> --- a/arch/arm64/boot/dts/arm/foundation-v8.dts
> +++ b/arch/arm64/boot/dts/arm/foundation-v8.dts
> @@ -78,7 +78,7 @@
>  		#address-cells = <2>;
>  		interrupt-controller;
>  		reg = <0x0 0x2c001000 0 0x1000>,
> -		      <0x0 0x2c002000 0 0x1000>,
> +		      <0x0 0x2c002000 0 0x2000>,
>  		      <0x0 0x2c004000 0 0x2000>,
>  		      <0x0 0x2c006000 0 0x2000>;
>  		interrupts = <1 9 0xf04>;
> 

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...
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