Messages in this thread | | | From | (Alan Cox) | Subject | Re: 2.2.0p7: fix to ioperm() ranges also needed | Date | Tue, 12 Jan 1999 14:15:11 +0000 (GMT) |
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> Chris Evans wrote: > > P.S. Offtopic. Can someome clarify for me the differences between iopl(1), > > iopl(2) and iopl(3)? Thank you! > > I don't know if iopl(1) and iopl(2) will cause any different behaviour > in Linux as I believe it's just rings 0 and 3 that are used. However, > you can interpret the iopl level as the maximum ring number that can use > io.
A good reference is the intel pentium II documentation set - which you can grab in pdf from intel.com
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