[Xen-devel] Usermode with Xen?

To:	"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	[Xen-devel] Usermode with Xen?
From:	Jun Koi <junkoi2004@xxxxxxxxx>
Date:	Tue, 27 Jan 2009 00:33:35 +0900
Delivery-date:	Mon, 26 Jan 2009 07:34:02 -0800
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Hi,

I found the concept of usermode in Xen is a bit confused. With Linux,
usermode means ring 3 code. In Xen, we also have function like
__copy_from_user(), which does copy data from "usermode" to Xen. But
users of Xen is guest VM, so I think usermode here means  ring 1 (for
paravirtualization) and non-root mode (for VTX/Pacifica). Is that
understanding correct?

Many thanks,
Jun

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[Xen-devel] Usermode with Xen?