Intel has released several updates already, but not all of them AFAIK. These microcode updates are of little impact until the kernel changes to activate the new MSRs are deployed. But they do mess with conditional jumps and LFENCE.
Anyway, uploading a partial, unofficial set of updates to unstable to close the bug. Several processors are still missing. I expect an official release from Intel soon, hopefully with updates for everything. Everyone should look for firmware updates, the usual good vendors already have them out, or will have them out by the end of the next week. -- Henrique Holschuh
