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SubjectRe: [PATCH] arm64: dts: qcom: sc7180: Drop the unused non-MSA SID
On 2020-06-30 13:49, Sibi Sankar wrote:
> Having a non-MSA (Modem Self-Authentication) SID bypassed breaks modem
> sandboxing i.e if a transaction were to originate from it, the hardware
> memory protections units (XPUs) would fail to flag them (any
> transaction
> originating from modem are historically termed as an MSA transaction).
> Drop the unused non-MSA modem SID on SC7180 SoCs and cheza so that SMMU
> continues to block them.
>
> Fixes: bec71ba243e95 ("arm64: dts: qcom: sc7180: Update Q6V5 MSS node")
> Fixes: 68aee4af5f620 ("arm64: dts: qcom: sdm845-cheza: Add iommus
> property")
> Cc: stable@vger.kernel.org
> Reported-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
> arch/arm64/boot/dts/qcom/sc7180-idp.dts | 2 +-
> arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> index 39dbfc89689e8..141de49a1b7d6 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
> @@ -312,7 +312,7 @@ &qupv3_id_1 {
> &remoteproc_mpss {
> status = "okay";
> compatible = "qcom,sc7180-mss-pil";
> - iommus = <&apps_smmu 0x460 0x1>, <&apps_smmu 0x444 0x3>;
> + iommus = <&apps_smmu 0x461 0x0>, <&apps_smmu 0x444 0x3>;
> memory-region = <&mba_mem &mpss_mem>;
> };
>
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> index 70466cc4b4055..64fc1bfd66fad 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
> @@ -634,7 +634,7 @@ &mdss_mdp {
> };
>
> &mss_pil {
> - iommus = <&apps_smmu 0x780 0x1>,
> + iommus = <&apps_smmu 0x781 0x0>,
> <&apps_smmu 0x724 0x3>;
> };

Reviewed-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>

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