Re: [PATCH v7 3/3] iommu/arm-smmu-v3: Enable CFGI/TLBI-repeat workaround on Tegra264
Jason Gunthorpe <[email protected]>
| Newsgroups | org.kernel.vger.linux-tegra,dev.linux.lists.iommu,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
On Tue, Jul 14, 2026 at 10:42:02AM +0000, Ashish Mhetre wrote:
> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> @@ -5357,8 +5357,10 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev,
> if (of_dma_is_coherent(dev->of_node))
> smmu->features |= ARM_SMMU_FEAT_COHERENCY;
>
> - if (of_device_is_compatible(dev->of_node, "nvidia,tegra264-smmu"))
> + if (of_device_is_compatible(dev->of_node, "nvidia,tegra264-smmu")) {
> tegra_cmdqv_dt_probe(dev->of_node, smmu);
> + static_branch_enable(&arm_smmu_erratum_repeat_tlbi_cfgi_key);
> + }
It is a bit of a big hammer to not have the per-instance FEAT but it
probably doesn't matter
Reviewed-by: Jason Gunthorpe <[email protected]>
Jason