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[Xen-devel] Re: /dev/mem and /dev/kmem
| To: | "Tian, Kevin" <kevin.tian@xxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: /dev/mem and /dev/kmem |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Wed, 21 Mar 2007 10:07:54 +0000 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 21 Mar 2007 03:07:00 -0700 |
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| In-reply-to: | Your message of "Wed, 21 Mar 2007 16:15:51 +0800." <D470B4E54465E3469E2ABBC5AFAC390F9E1333@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> |
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> 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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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