Re: [Xen-users] Dom0 Device Driver Access

[jim burns <jim_burn@xxxxxxxxxxxxx>]

On Tuesday June 17 2008 01:00:25 pm Artur Baruchi wrote:
> Does Dom0 access device driver using Ring Structures (like DomU does)
> or it has direct access to Device Driver (like Native Linux)?

Yes and no. Things like memory management and paging are done by xen.gz. 
Device access is (usually) done by dom0. xen.gz runs in ring 0; dom0 runs in 
ring 1 (not sure about the domus); and userland runs in ring 3. A quick 
search of xen.org couldn't provide a url to back this up.

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