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[Xen-devel] Re: /dev/mem and /dev/kmem

> Based on different interfaces used by /dev/mem and /dev/kmem 
> (direct_remap_pfn_range for former, and remap_pfn_range for the 
> latter), could I think that /dev/mem is the interface for dom0 to map 
> machine memory directly, while /dev/kmem is still geared to dom0's 
> own memory? If yes, then I may understand how Xserver can map 
> VGABIOS and why DOMID_IO is used for /dev/mem... :-)

Yes, that's about right.

 -- Keir

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