Messages in this thread | | | Date | Mon, 17 Oct 2005 17:22:59 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC] RNG rewrite... |
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Jeff Garzik wrote: > >> MSR instructions cannot execute out of userspace, but the MSR driver >> might be possible to use. It's usually quite slow, however. > > MSRs are used for setup, not for actual data. > > Intel: magic MMIO address (readb) > AMD: magic PIO address (inl) > VIA: CPU instruction ('xstore') >
For setup, the MSR driver is fine.
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