User-mode in ring 0
Posted Jul 25, 2005 15:50 UTC (Mon) by corbet
In reply to: OLS: Xen and UML
Parent article: OLS: Xen and UML
The point is that it's not a real ring 0, it's a virtualized one created by the hardware. It's real in that it is protected from the virtualized ring 3 where UML's user space runs, and it can do a few semi-privileged things, but it's not the same ring 0 that the host system runs in.
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