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[2a02:8388:6584:6400:d322:7350:96d2:429d]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a90613205b8sm674839866b.188.2024.09.19.00.00.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 19 Sep 2024 00:00:47 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Thu, 19 Sep 2024 09:00:46 +0200 Message-Id: Cc: "Marijn Suijten" , , , , "Konrad Dybcio" Subject: Re: [RFC PATCH 00/11] Affirm SMMU coherent pagetable walker capability on RPMh SoCs From: "Luca Weiss" To: "Konrad Dybcio" , "Bjorn Andersson" , "Rob Herring" , "Krzysztof Kozlowski" , "Conor Dooley" , X-Mailer: aerc 0.18.2-0-ge037c095a049 References: <20240919-topic-apps_smmu_coherent-v1-0-5b3a8662403d@quicinc.com> In-Reply-To: <20240919-topic-apps_smmu_coherent-v1-0-5b3a8662403d@quicinc.com> On Thu Sep 19, 2024 at 12:57 AM CEST, 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. Hi Konrad! You want people with the affected SoCs to test this I imagine? Just boot it and see if it doesn't implode, or do you have any more elaborate test plan for this? Regards Luca > > Signed-off-by: Konrad Dybcio > --- > 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,