linux-kernel - Re: [RFC PATCH 00/11] Affirm SMMU coherent pagetable walker capability on RPMh SoCs

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Message-ID: <491d06a6-1a82-4199-8eb3-79909a128458@linaro.org>
Date: Fri, 20 Sep 2024 09:35:49 +0200
From: neil.armstrong@...aro.org
To: Konrad Dybcio <konradybcio@...nel.org>,
 Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, cros-qcom-dts-watchers@...omium.org
Cc: Marijn Suijten <marijn.suijten@...ainline.org>,
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, Konrad Dybcio <quic_kdybcio@...cinc.com>
Subject: Re: [RFC PATCH 00/11] Affirm SMMU coherent pagetable walker
 capability on RPMh SoCs

On 19/09/2024 00:57, Konrad Dybcio wrote:
> I only read back the SMMU config on X1E & 7280, but I have it on good
> authority that this concerns all RPMh SoCs. Sending as RFC just in case.
> 
> Lacking coherency can hurt performance, but claiming coherency where it's
> absent would lead to a kaboom.
> 
> Signed-off-by: Konrad Dybcio <quic_kdybcio@...cinc.com>
> ---
> Konrad Dybcio (11):
>        arm64: dts: qcom: qdu1000: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sc7180: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sc8180x: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sc8280xp: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sdm670: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sdm845: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sm6350: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sm8150: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sm8350: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: sm8450: Affirm IDR0.CCTW on apps_smmu
>        arm64: dts: qcom: x1e80100: Affirm IDR0.CCTW on apps_smmu
> 
>   arch/arm64/boot/dts/qcom/qdu1000.dtsi  | 1 +
>   arch/arm64/boot/dts/qcom/sc7180.dtsi   | 1 +
>   arch/arm64/boot/dts/qcom/sc8180x.dtsi  | 2 +-
>   arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 1 +
>   arch/arm64/boot/dts/qcom/sdm670.dtsi   | 1 +
>   arch/arm64/boot/dts/qcom/sdm845.dtsi   | 1 +
>   arch/arm64/boot/dts/qcom/sm6350.dtsi   | 1 +
>   arch/arm64/boot/dts/qcom/sm8150.dtsi   | 1 +
>   arch/arm64/boot/dts/qcom/sm8350.dtsi   | 1 +
>   arch/arm64/boot/dts/qcom/sm8450.dtsi   | 1 +
>   arch/arm64/boot/dts/qcom/x1e80100.dtsi | 2 ++
>   11 files changed, 12 insertions(+), 1 deletion(-)
> ---
> base-commit: 55bcd2e0d04c1171d382badef1def1fd04ef66c5
> change-id: 20240919-topic-apps_smmu_coherent-070f38a2c207
> 
> Best regards,

Ran this serie in our CI, here's the pipeline: https://git.codelinaro.org/linaro/qcomlt/ci/staging/cdba-tester/-/pipelines/104656
For some lab reasons, x1e80100 & onneplus-enchilada didn't boot, ignore them.

Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on sdm845-rb3
Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on sm8150-hdk
Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on sm8350-hdk
Tested-by: Neil Armstrong <neil.armstrong@...aro.org> # on sm8450-hdk

Neil