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The hardware-recommended software workaround is to >> issue every CFGI/TLBI command (each followed by CMD_SYNC) twice. >> The second issue must execute only after the first issue's CMD_SYNC >> has completed, giving the sequence: >> >> [...] > Applied to iommu (arm/smmu/updates), thanks! > But please check the comments from Sashiko if you get a chance: > > https://sashiko.dev/#/patchset/20260726081904.1408859-1-amhetre@nvidia.com Both comments from Sashiko can be ignored. Regarding comment on 2/4, it's false positive as at that point batches won't have mix commands. Regarding comment on 3/4, the erratum is exposed via hw_info. So, it need to apply the WAR by checking the new flag else it's a bug in VMM. > [1/4] iommu/arm-smmu-v3: Factor out CMDQ batch force-sync conditions > https://git.kernel.org/iommu/c/097bf4a02f2d > [2/4] iommu/arm-smmu-v3: Add CFGI/TLBI-repeat workaround > https://git.kernel.org/iommu/c/95ed2da20283 > [3/4] iommu/arm-smmu-v3-iommufd: Report CFGI/TLBI-repeat erratum > https://git.kernel.org/iommu/c/d501d66815ee > [4/4] iommu/arm-smmu-v3: Enable CFGI/TLBI-repeat workaround on Tegra264 > https://git.kernel.org/iommu/c/06b15ddcfbc0 > > Cheers, > -- > Will > > https://fixes.arm64.dev > https://next.arm64.dev > https://will.arm64.dev