Conrad Pankoff 17aef7dc99 Kernel: Detect support for no-execute (NX) CPU features ...

Previously we assumed all hosts would have support for IA32_EFER.NXE.
This is mostly true for newer hardware, but older hardware will crash
and burn if you try to use this feature.

Now we check for support via CPUID.80000001[20].

2019-12-26 10:05:51 +01:00

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