linux-kernel - Re: [PATCH] arm64: dts: mediatek: mt8195-demo: fix the memory size of node secmon

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Date:   Mon, 26 Sep 2022 15:05:44 +0800
From:   Miles Chen <miles.chen@...iatek.com>
To:     <macpaul.lin@...iatek.com>
CC:     <bear.wang@...iatek.com>, <devicetree@...r.kernel.org>,
        <fparent@...libre.com>, <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <linux-usb@...r.kernel.org>,
        <macpaul@...il.com>, <matthias.bgg@...il.com>,
        <miles.chen@...iatek.com>, <pablo.sun@...iatek.com>,
        <robh+dt@...nel.org>, <stable@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: mediatek: mt8195-demo: fix the memory size of node secmon

Hi Macpaul,

> The size of device tree node secmon (bl31_secmon_reserved) was
> incorrect. It should be increased to 2MiB (0x200000).

192K should work when the patch(6147314aeedc) was accepted.
Does the trusted-firmware-a get larger now, so we need to
increase the size to 2MiB?

thanks,
Miles

> 
> The origin setting will cause some abnormal behavior due to
> trusted-firmware-a and related firmware didn't load correctly.
> The incorrect behavior may vary because of different software stacks.
> For example, it will cause build error in some Yocto project because
> it will check if there was enough memory to load trusted-firmware-a
> to the reserved memory.
> 
> Cc: stable@...r.kernel.org      # v5.19
> Fixes: 6147314aeedc ("arm64: dts: mediatek: Add device-tree for MT8195 Demo board")
> Signed-off-by: Macpaul Lin <macpaul.lin@...iatek.com>