Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

microcodeIntel: 20200520 -> 20200609 #89981

Merged
merged 2 commits into from Jun 16, 2020
Merged

Conversation

mweinelt
Copy link
Member

@mweinelt mweinelt commented Jun 9, 2020

Motivation for this change

Microcode updates for lots of generations.

https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/releases/tag/microcode-20200609

Things done
  • Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
  • Built on platform(s)
    • NixOS
    • macOS
    • other Linux distributions
  • Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
  • Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
  • Tested execution of all binary files (usually in ./result/bin/)
  • Determined the impact on package closure size (by running nix path-info -S before and after)
  • Ensured that relevant documentation is up to date
  • Fits CONTRIBUTING.md.

@andir

@grahamc
Copy link
Member

grahamc commented Jun 9, 2020

Looks like the hash needs updating.

@mweinelt
Copy link
Member Author

Adding the security label sigh.

CrossTalk/SRBDS Shows Possibility Of Leaking Information Across Physical CPU Cores

https://www.phoronix.com/scan.php?page=article&item=crosstalk-srbds-vulnerability&num=1

Ha, Intel were so proud of their high throughput RDRAND, and now it turns out they leak the values all over the other cores and the microcode patch to fix it... has a 97% performance hit. As in you get ~1/30th of the performance you used to. Whoops!

https://www.phoronix.com/scan.php?page=news_item&px=RdRand-3-Percent

https://twitter.com/marcan42/status/1270641885288165378

@andir andir merged commit 1419b35 into NixOS:master Jun 16, 2020
@mweinelt mweinelt deleted the microcode-intel branch June 16, 2020 20:43
@mweinelt mweinelt restored the microcode-intel branch November 12, 2020 19:07
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Projects
None yet
Development

Successfully merging this pull request may close these issues.

None yet

3 participants