https://www.engadget.com/2018/10/18/mit-dawg-fights-spectre-attacks/
By Jon Fingas
Engadget.com
October 18, 2018
Many companies have developed patches to mitigate Meltdown- and
Spectre-like speculative memory attacks. However, they can come with
compromises: they can leave major gaps and still slow down your system.
MIT researchers may have a better way. They've developed a new method,
Dynamically Allocated Way Guard (yes, DAWG is on purpose), that promises
tight security without dragging performance through the dirt.
It boils down to isolating memory caches on processors in a way that
prevents them from seeing anything they don't need to know. MIT likens it
to putting walls in a kitchen that prevent chefs from seeing each other's
ingredients and tools. There are multiple separate cache ways with their
own domain identities, each of which is validated. New policies,
meanwhile, deal with cache "misses" that could signal an attack.
[...]
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