linux-kernel - [PATCH 5.8 042/232] arm64: dts: qcom: sc7180: Drop the unused non-MSA SID

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Date:   Thu, 20 Aug 2020 11:18:13 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Douglas Anderson <dianders@...omium.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Sibi Sankar <sibis@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: [PATCH 5.8 042/232] arm64: dts: qcom: sc7180: Drop the unused non-MSA SID

From: Sibi Sankar <sibis@...eaurora.org>

commit 08257610302159e08fd4f5d33787807374ea63c7 upstream.

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.

Tested-by: Douglas Anderson <dianders@...omium.org>
Reviewed-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Reviewed-by: Douglas Anderson <dianders@...omium.org>
Fixes: bec71ba243e95 ("arm64: dts: qcom: sc7180: Update Q6V5 MSS node")
Fixes: 68aee4af5f620 ("arm64: dts: qcom: sdm845-cheza: Add iommus property")
Cc: stable@...r.kernel.org
Reported-by: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>
Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
Link: https://lore.kernel.org/r/20200630081938.8131-1-sibis@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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(-)

--- a/arch/arm64/boot/dts/qcom/sc7180-idp.dts
+++ b/arch/arm64/boot/dts/qcom/sc7180-idp.dts
@@ -312,7 +312,7 @@
 &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>;
 };
 
--- a/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-cheza.dtsi
@@ -634,7 +634,7 @@ ap_ts_i2c: &i2c14 {
 };
 
 &mss_pil {
-	iommus = <&apps_smmu 0x780 0x1>,
+	iommus = <&apps_smmu 0x781 0x0>,
 		 <&apps_smmu 0x724 0x3>;
 };