From mboxrd@z Thu Jan  1 00:00:00 1970
From: Konrad Rzeszutek Wilk <konrad@kernel.org>
Subject: Re: domu to dom0's entry point
Date: Mon, 17 Sep 2012 10:27:36 -0400
Message-ID: <20120917142734.GA14012@phenom.dumpdata.com>
References: <CAESzvYTsHm+QYiP6TCYXUC3AWfP-LuzvxOVYN7bnd6MF=a3v6Q@mail.gmail.com>
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To: Nitin Gupta <nitin.kobain@gmail.com>
Cc: xen-devel@lists.xen.org
List-Id: xen-devel@lists.xenproject.org

On Sat, Sep 15, 2012 at 07:00:56PM +0530, Nitin Gupta wrote:
> Hi,
> 
> I have a query.
> 
> Dom0 is the administrative kernel which can access I/O devices through
> hypervisor. So if an application wants to write to an I/O device then it
> should go through Dom0. Is it right? If its so then can anyone point to the

No. It will go to the hypervisor if the DomU has been granted access
to those I/O ports/MMIO bars..

> entry and exit points in Dom0.
> 
> -- 
> Regards,
> Nitin Gupta

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