Thunderclap TL;DR: someone finally tried on PCs (over Thunderbolt) what we did on the PS4 (over PCIe) years ago. As I said at the time, IOMMUs are useless if the drivers are not written assuming the device is evil. *Nobody* writes PCIe drivers assuming the device is evil.
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I am a believer in coarse grained security. There are indefensible boundaries. Imagine if JavaScript on web pages tried to be more granular than same origin.
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Anything remotely plug and play should be moderately safe to do so by design.
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What about evil displays, (e)SATA, SIM etc ? *NOT* thinking about evil onboard or RAM chips ... Any idea how to not get paranoid ?
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