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arm64: dts: qcom: Remove "iommus" property from PCIe nodes
Currently, most of the Qualcomm SoCs specify both "iommus" and "iommu-map" properties for the PCIe nodes. First one passes the SMR mask to the iommu driver and the latter specifies the SID for each PCIe device. But with "iommus" property, the PCIe controller will be added to the iommu group along with the devices. This makes no sense because the controller will not initiate any DMA transaction on its own. And moreover, it is not strictly required to pass the SMR mask to the iommu driver. If the "iommus" property is not present, then the default mask of "0" would be used which should work for all PCIe devices. On the other side, if the SMR mask specified doesn't match the one expected by the hypervisor, then all the PCIe transactions will end up triggering "Unidentified Stream Fault" by the SMMU. So to get rid of these hassles and also prohibit PCIe controllers from adding to the iommu group, let's remove the "iommus" property from PCIe nodes. Reported-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/linux-arm-msm/20230227195535.GA749409-robh@kernel.org Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Bjorn Andersson <andersson@kernel.org> Signed-off-by: Bjorn Andersson <andersson@kernel.org> Link: https://lore.kernel.org/r/20230308075648.134119-1-manivannan.sadhasivam@linaro.org
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7 changed files with 0 additions and 15 deletions
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@ -2140,8 +2140,6 @@ pcie1: pci@1c08000 {
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dma-coherent;
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iommus = <&apps_smmu 0x1c80 0x1>;
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iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,
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<0x100 &apps_smmu 0x1c81 0x1>;
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@ -2329,7 +2329,6 @@ pcie0: pci@1c00000 {
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"slave_q2a",
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"tbu";
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iommus = <&apps_smmu 0x1c10 0xf>;
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iommu-map = <0x0 &apps_smmu 0x1c10 0x1>,
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<0x100 &apps_smmu 0x1c11 0x1>,
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<0x200 &apps_smmu 0x1c12 0x1>,
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@ -2440,7 +2439,6 @@ pcie1: pci@1c08000 {
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assigned-clocks = <&gcc GCC_PCIE_1_AUX_CLK>;
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assigned-clock-rates = <19200000>;
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iommus = <&apps_smmu 0x1c00 0xf>;
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iommu-map = <0x0 &apps_smmu 0x1c00 0x1>,
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<0x100 &apps_smmu 0x1c01 0x1>,
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<0x200 &apps_smmu 0x1c02 0x1>,
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@ -1848,7 +1848,6 @@ pcie0: pci@1c00000 {
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"slave_q2a",
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"tbu";
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iommus = <&apps_smmu 0x1d80 0x3f>;
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iommu-map = <0x0 &apps_smmu 0x1d80 0x1>,
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<0x100 &apps_smmu 0x1d81 0x1>;
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@ -1947,7 +1946,6 @@ pcie1: pci@1c08000 {
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assigned-clocks = <&gcc GCC_PCIE_1_AUX_CLK>;
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assigned-clock-rates = <19200000>;
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iommus = <&apps_smmu 0x1e00 0x3f>;
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iommu-map = <0x0 &apps_smmu 0x1e00 0x1>,
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<0x100 &apps_smmu 0x1e01 0x1>;
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@ -1877,7 +1877,6 @@ pcie0: pci@1c00000 {
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"tbu",
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"ddrss_sf_tbu";
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iommus = <&apps_smmu 0x1c00 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1c00 0x1>,
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<0x100 &apps_smmu 0x1c01 0x1>;
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@ -1984,7 +1983,6 @@ pcie1: pci@1c08000 {
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assigned-clocks = <&gcc GCC_PCIE_1_AUX_CLK>;
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assigned-clock-rates = <19200000>;
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iommus = <&apps_smmu 0x1c80 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,
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<0x100 &apps_smmu 0x1c81 0x1>;
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@ -2093,7 +2091,6 @@ pcie2: pci@1c10000 {
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assigned-clocks = <&gcc GCC_PCIE_2_AUX_CLK>;
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assigned-clock-rates = <19200000>;
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iommus = <&apps_smmu 0x1d00 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1d00 0x1>,
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<0x100 &apps_smmu 0x1d01 0x1>;
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@ -1532,7 +1532,6 @@ pcie0: pci@1c00000 {
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"aggre1",
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"aggre0";
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iommus = <&apps_smmu 0x1c00 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1c00 0x1>,
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<0x100 &apps_smmu 0x1c01 0x1>;
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@ -1616,7 +1615,6 @@ pcie1: pci@1c08000 {
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"ddrss_sf_tbu",
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"aggre1";
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iommus = <&apps_smmu 0x1c80 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,
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<0x100 &apps_smmu 0x1c81 0x1>;
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@ -1786,7 +1786,6 @@ pcie0: pci@1c00000 {
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"aggre0",
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"aggre1";
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iommus = <&apps_smmu 0x1c00 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1c00 0x1>,
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<0x100 &apps_smmu 0x1c01 0x1>;
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@ -1899,7 +1898,6 @@ pcie1: pci@1c08000 {
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"ddrss_sf_tbu",
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"aggre1";
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iommus = <&apps_smmu 0x1c80 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1c80 0x1>,
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<0x100 &apps_smmu 0x1c81 0x1>;
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@ -1698,7 +1698,6 @@ pcie0: pci@1c00000 {
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<&gem_noc MASTER_APPSS_PROC 0 &cnoc_main SLAVE_PCIE_0 0>;
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interconnect-names = "pcie-mem", "cpu-pcie";
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iommus = <&apps_smmu 0x1400 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1400 0x1>,
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<0x100 &apps_smmu 0x1401 0x1>;
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@ -1795,7 +1794,6 @@ pcie1: pci@1c08000 {
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<&gem_noc MASTER_APPSS_PROC 0 &cnoc_main SLAVE_PCIE_1 0>;
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interconnect-names = "pcie-mem", "cpu-pcie";
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iommus = <&apps_smmu 0x1480 0x7f>;
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iommu-map = <0x0 &apps_smmu 0x1480 0x1>,
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<0x100 &apps_smmu 0x1481 0x1>;
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