haaber:
> Just a small comprehension question to the microkerel update shipped in
> the last xen update: are these microkernels "flashed" into some cpu
> memory, or are they re-run / setup at each boot again? Cheers, Bernhard
> 
I think you mean microcode. From what I know, the CPU starts with burned
in microcode. Firmware/BIOS will then patch it if it has a more current
version. The OS will then patch it again if a more current version.

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