linux-kernel - Re: [PATCH 1/3] arm64: dts: meson-gx: add ATF BL32 reserved-memory region

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Message-ID: <a279c365-0615-1c7f-5596-dec9ad1c8229@lexina.in>
Date:   Wed, 26 Jan 2022 08:35:00 +0300
From:   Vyacheslav <adeep@...ina.in>
To:     Christian Hewitt <christianshewitt@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kevin Hilman <khilman@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] arm64: dts: meson-gx: add ATF BL32 reserved-memory
 region

Hi!

26.01.2022 07:49, Christian Hewitt wrote:
> Add an additional reserved memory region for the BL32 trusted firmware
> present in many devices that boot from Amlogic vendor u-boot.
> 
> Suggested-by: Mateusz Krzak <kszaquitto@...il.com>
> Signed-off-by: Christian Hewitt <christianshewitt@...il.com>
> ---
>   arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 6 ++++++
>   1 file changed, 6 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
> index 6b457b2c30a4..aa14ea017a61 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
> +++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
> @@ -49,6 +49,12 @@
>   			no-map;
>   		};
>   
> +		/* 32 MiB reserved for ARM Trusted Firmware (BL32) */
> +		secmon_reserved_bl32: secmon@...0000 {
> +			reg = <0x0 0x05300000 0x0 0x2000000>;
> +			no-map;
> +		};
> +
How do I check if we need a similar patch for axg boards?


>   		linux,cma {
>   			compatible = "shared-dma-pool";
>   			reusable;
>