Firstly, this was a great post by Christian Reis in 2018:
However, since back then newer forms have been reported.
https://www.theregister.co.uk/2019/10/29/intel_disable_hyper_threading_linux_kernel_maintainer/
https://zombieloadattack.com/
And so I was wondering if Christian’s post can be updated to reflect the new info. It’s a very nice one stop resource for novices like me.
In the post can the following also be included:
- I’d also like to know whether hyper-threading is turned off by default (as recommended by GKH in The Register article mentioned above) on Ubuntu or not, and if not how to do so.
- How to identify what mitigations are turned on currently. How should I interpret the output of grep . /sys/devices/system/cpu/vulnerabilities/*
Apologies in advance if this is not the correct place to ask these questions and feel free to take down the post if necessary.