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charset="utf-8" From: Nazim Amirul The SMMU is disabled in socfpga_agilex5.dtsi. The SoC uses a different memory-mapped base address for its peripherals, which requires the SMMU to be active so that the Secure Device Manager (SDM) can correctly access those regions through address translation. Signed-off-by: Nazim Amirul --- Changes in v3: - Fix commit header to follow subsystem naming convention - Remove commit body line that restated the subject - Clarify which file had the SMMU disabled Changes in v2: - Move SMMU enable into the base DTSI file instead of individual DTS files --- arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/bo= ot/dts/intel/socfpga_agilex5.dtsi index b06c6d5d60ee..64f3739a0c33 100644 --- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi +++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi @@ -385,7 +385,7 @@ smmu: iommu@16000000 { interrupt-names =3D "eventq", "gerror", "priq"; dma-coherent; #iommu-cells =3D <1>; - status =3D "disabled"; + status =3D "okay"; }; =20 spi0: spi@10da4000 { --=20 2.43.7 From nobody Mon Jun 8 09:49:57 2026 Received: from CH5PR02CU005.outbound.protection.outlook.com (mail-northcentralusazon11012053.outbound.protection.outlook.com [40.107.200.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 17E453A383C; 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charset="utf-8" From: Nazim Amirul The SMMU is enabled and transactions going through it are cache coherent. Add the dma-coherent property to the XGMAC nodes to prevent redundant cache flush/invalidate operations and potential stale data issues. Signed-off-by: Nazim Amirul --- Changes in v3: - Fix commit header to follow subsystem naming convention (add agilex5: pre= fix) Changes in v2: - Move dma-coherent property into the base DTSI file instead of individual = DTS files --- arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi b/arch/arm64/bo= ot/dts/intel/socfpga_agilex5.dtsi index 64f3739a0c33..bef386cb2fcc 100644 --- a/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi +++ b/arch/arm64/boot/dts/intel/socfpga_agilex5.dtsi @@ -577,6 +577,7 @@ gmac0: ethernet@10810000 { altr,sysmgr-syscon =3D <&sysmgr 0x44 0>; snps,clk-csr =3D <0>; iommus =3D <&smmu 1>; + dma-coherent; status =3D "disabled"; =20 stmmac_axi_emac0_setup: stmmac-axi-config { @@ -690,6 +691,7 @@ gmac1: ethernet@10820000 { altr,sysmgr-syscon =3D <&sysmgr 0x48 0>; snps,clk-csr =3D <0>; iommus =3D <&smmu 2>; + dma-coherent; status =3D "disabled"; =20 stmmac_axi_emac1_setup: stmmac-axi-config { @@ -803,6 +805,7 @@ gmac2: ethernet@10830000 { altr,sysmgr-syscon =3D <&sysmgr 0x4c 0>; snps,clk-csr =3D <0>; iommus =3D <&smmu 3>; + dma-coherent; status =3D "disabled"; =20 stmmac_axi_emac2_setup: stmmac-axi-config { --=20 2.43.7