netdev - Re: [PATCH 03/15] arm64: dts: mediatek: mt7981b: Add reserved memory for TF-A

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Message-ID: <43b9b071-5da1-42bf-b74a-ccd6877a2040@collabora.com>
Date: Thu, 16 Oct 2025 13:29:08 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Sjoerd Simons <sjoerd@...labora.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>,
 Ryder Lee <ryder.lee@...iatek.com>, Jianjun Wang
 <jianjun.wang@...iatek.com>, Bjorn Helgaas <bhelgaas@...gle.com>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczyński <kwilczynski@...nel.org>,
 Manivannan Sadhasivam <mani@...nel.org>,
 Chunfeng Yun <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>,
 Kishon Vijay Abraham I <kishon@...nel.org>, Lee Jones <lee@...nel.org>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Lorenzo Bianconi <lorenzo@...nel.org>, Felix Fietkau <nbd@....name>
Cc: kernel@...labora.com, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, linux-pci@...r.kernel.org,
 linux-phy@...ts.infradead.org, netdev@...r.kernel.org,
 Daniel Golle <daniel@...rotopia.org>, Bryan Hinton <bryan@...anhinton.com>
Subject: Re: [PATCH 03/15] arm64: dts: mediatek: mt7981b: Add reserved memory
 for TF-A

Il 16/10/25 12:08, Sjoerd Simons ha scritto:
> Add memory range handled by ARM Trusted Firmware
> 
> Signed-off-by: Sjoerd Simons <sjoerd@...labora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

> ---
>   arch/arm64/boot/dts/mediatek/mt7981b.dtsi | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> index 6b024156fa7c5..b477375078ccd 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> @@ -41,6 +41,18 @@ psci {
>   		method = "smc";
>   	};
>   
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		/* 192 KiB reserved for ARM Trusted Firmware (BL31) */
> +		secmon_reserved: secmon@...00000 {
> +			reg = <0 0x43000000 0 0x30000>;
> +			no-map;
> +		};
> +	};
> +
>   	soc {
>   		compatible = "simple-bus";
>   		ranges;
>