Re:Tor at the Heart: Firefox
by drvdevd on Tuesday January 03, 2017 @10:32AM
(#13309751)
Interesting. I wonder to what extent one could trap vectorization instructions in e.g. KVM. Presumably they are unprivileged instructions on x86?
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> Presumably they are unprivileged instructions on x86?
They're all unprivileged; having to go to the kernel would defeat the purpose most of the time.
Also, trapping them wouldn't make a difference. Fixing the CPUID fields on the other hand (so that these code paths are not taken in the first place)...