more or less... I'm surprised the CPU doesn't already flush caches after specula...

plorkyeran · on Jan 22, 2018

Flushing the cache after every branch misprediction would probably make branch prediction a net loss in performance.

eecc · on Jan 22, 2018

Well not all caches, just the part tagged with the mispredicted branch

singingboyo · on Jan 24, 2018

But that'd still be vulnerable.

The issue isn't that you can read whatever was in/got brought into cache, the issue is that you can tell which part of the cache got evicted and infer values based on that.