linux-kernel - Re: [Xen-devel] [PATCH WIP 3/6] xen/arm: get privilege status

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Message-ID: <alpine.DEB.2.02.1207121840230.23783@kaball.uk.xensource.com>
Date:	Thu, 12 Jul 2012 18:43:43 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"Tim (Xen.org)" <tim@....org>,
	Ian Campbell <Ian.Campbell@...rix.com>
Subject: Re: [Xen-devel] [PATCH WIP 3/6] xen/arm: get privilege status

On Mon, 9 Jul 2012, Konrad Rzeszutek Wilk wrote:
> On Fri, Jun 22, 2012 at 05:14:42PM +0100, Stefano Stabellini wrote:
> > Use Xen features to figure out if we are privileged.
> 
> Is there a corresponding Xen c/s for the XNEFEAT_dom0?

Yes, that would be 23735
(http://xenbits.xensource.com/hg/xen-unstable.hg/rev/537918f518ee).

> Why can't the existing SIF_PRIVILIGED call work? Isn't that
> somethign that the hypervisor sets for the guest?

SIF_PRIVILIGED is in the start_info page that ARM guests don't have.
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