Re: [PATCH v7 2/3] iommu/arm-smmu-v3: Introduce CFGI/TLBI-repeat workaround infrastructure

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 Fri, Jul 17, 2026 at 02:16:53PM -0700, Nicolin Chen wrote:
> Given the use cases on Tegra264, instead of patching the iommufd
> path as this patch does, perhaps we should simply spit a WARN in
> arm_vsmmu_init():

Nope, in this case you need to make the errata discoverable through
the viommu info so the VMM can validate the right DT is used, or apply
the WAR itself before submitting commands to the kernel.

Some kind of new flag in the viommu struct I guess

Jason
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