On 2018-02-12 19:24, Daniel Frey wrote:

> I've read online that there should be vulnerability info (Meltdown,
> Spectre) in /sys under /sys/devices/system/cpu/vulnerabilities but this
> doesn't exist on my PC.

> I've updated to gentoo-sources-4.9.76-r1, shouldn't this info be present?
> $ uname -a
> Linux zatpc 4.9.76-gentoo-r1 #1 SMP Mon Feb 12 09:20:32 PST 2018 x86_64
> Intel(R) Core(TM)2 Extreme CPU X9650 @ 3.00GHz GenuineIntel GNU/Linux

See the other threads: you need at least 4.9.79 for the /sys bits.

If you've enabled PTI at build time it's enabled, no need to do anything

Later 4.9 kernels also contain patches for spectre (PTI is not relevant

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