OK, finally an actually-working Spectre v1 mitigation: mov %cr0,%eax or $0x40000000,%eax mov %eax,%cr0 wbinvd
-
-
Oh wait. If the cpu has HT, can you just steal a whole HT thread to constantly clobber BTBs?
-
This should be easy to test without kernel hacks. Pin task to odd-numbered core, set max realtime priority, spam insns that clobber btbs, run spectre test.
-
I'd love to hear the outcome of such a test.
End of conversation
New conversation -
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.