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.

Another place is in /proc/cpuinfo, no info on meltdown/spectre in there

Yet another place is in dmesg, (grep 'page tables isolation') nothing
there either.

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

$ zgrep PAGE_TABLE_ISO /proc/config.gz

Or does the page table isolation need to be explicitly turned on?


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