linux-kernel - Re: [PATCH] arm64: dts: qcom: msm8998: Extend reserved memory area

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Date:   Wed, 13 Feb 2019 10:38:05 +0100
From:   Marc Gonzalez <marc.w.gonzalez@...e.fr>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>
Cc:     Jeffrey Hugo <jhugo@...eaurora.org>,
        Evan Green <evgreen@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Lee Jones <lee.jones@...aro.org>,
        MSM <linux-arm-msm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: qcom: msm8998: Extend reserved memory area

On 12/02/2019 16:16, Marc Gonzalez wrote:

> My console locks up as soon as Linux writes to [88800000,88f00000[
> AFAIU, that memory area is reserved for trustzone.
> 
> Extend the reserved memory range, to prevent Linux from stepping on
> trustzone's feet.

s/feet/toes/

Bjorn/Andy, could you fold this vital fixup into the final patch? ^_^

> [    0.000000] early_memtest: # of tests: 17
> [    0.000000]   0x0000000080000000 - 0x0000000080080000 pattern 4c494e5558726c7a
> [    0.000000]   0x0000000080c7a000 - 0x0000000083200000 pattern 4c494e5558726c7a
> [    0.000000]   0x0000000083205b94 - 0x0000000085800000 pattern 4c494e5558726c7a
> [    0.000000]   0x0000000088f00000 - 0x00000000a1e00000 pattern 4c494e5558726c7a
> [    0.000000]   0x00000000a2000000 - 0x000000017dbc06c8 pattern 4c494e5558726c7a
> [    0.000000]   0x000000017dbc06f7 - 0x000000017dbc06f8 pattern 4c494e5558726c7a
> 
> Cc: stable@...r.kernel.org # 4.20+
> Fixes: c7833949564ec ("arm64: dts: qcom: msm8998: Add smem related nodes")
> Signed-off-by: Marc Gonzalez <marc.w.gonzalez@...e.fr>
> ---
>  arch/arm64/boot/dts/qcom/msm8998.dtsi | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> index d69401152089..f5ec83a91fe4 100644
> --- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> @@ -38,7 +38,7 @@
>  		};
>  
>  		memory@...00000 {
> -			reg = <0x0 0x86200000 0x0 0x2600000>;
> +			reg = <0x0 0x86200000 0x0 0x2d00000>;
>  			no-map;
>  		};
>