[Xen-devel] Dom0 IO handling

[maheen butt <maheen_butt26@xxxxxxxxx>]

Hi all,

I'm investigating the source code of Xenified kernel. From documentations related to

Xen told me that all guest domains run in less privilege mode ( ring 1 in case of x86).

Dom0 is also running in ring 1. But it can have direct access to IO devices. It means

Dom0 has a special bahaviour that it is running in ring1 but can directly access IO devices.

How Dom0 access IO devices directly?

how can I relate this special way of Dom0 with its source code?

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel