Read CPU flags related to Spectre and Meltdown Vulnerabilities

[ale5000-git]

Hi, is it possible to read CPU flags related to Spectre and Meltdown vulnerabilities?

These ones:

spec_ctrl
spec_ctrl_ibrs
pti
kaiser
pcid
invpcid

[workhorsy]

Maybe. It may just happen to work with the current way it reads flags:

On Linux, it is doing:

cat /proc/cpuinfo | grep flags

On OSX it is using sysctl and reading machdep.cpu.features, machdep.cpu.leaf7_features, and machdep.cpu.extfeatures fields:

sysctl machdep.cpu hw.cpufrequency

I don't think it will work on Windows, as I don't have an affected Windows machine to test it on. And I'm not sure how to read the new cpu flags. Anybody want to help with this?