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That is often incorrect for Apple computers, whether x64+T2 or aarch64: https://support.apple.com/fr-tn/guide/security/seca4960c2b5/...

And it’s often incorrect on x64 PCs when IOMMU access is appropriately segmented. See also e.g. Thunderclap: https://www.ndss-symposium.org/wp-content/uploads/ndss2019_0...

It may still be true in some cases, but it shouldn’t be taken for granted that it’s always true.



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