From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thierry Laurion <thierry.laurion@gmail.com>
Subject: Re: pre Sandy bridge IOMMU support (gm45)
Date: Tue, 26 Jan 2016 23:39:00 +0000
Message-ID: <CAAzJznx82jCy_u_n4s11H_eeZuyVpzHyuuUObOBgf=Y1Ux+wPQ@mail.gmail.com>
References: <CAAzJznzyDqyuSBZOJowGnFKDBKYSTrhLge18wggG0uycYHPaRQ@mail.gmail.com>
	<56A63F9502000078000CAAD1@prv-mh.provo.novell.com>
	<CAAzJznyZ+8RbmL4+EK7rZUPJApkSywhKkk_=rO9jyzoMw4JQvQ@mail.gmail.com>
	<56A75DF402000078000CAFAF@prv-mh.provo.novell.com>
	<CAAzJznxr4CT8J0fnx1kkWfQ+56J0PH+QBjgjH=6phtzbDd4dyw@mail.gmail.com>
	<56A7687102000078000CB035@prv-mh.provo.novell.com>
	<CAAzJznw26NpcC_6adp6eT16RReXqaaWidsS07_RERvPPUZeQCQ@mail.gmail.com>
	<56A7744A02000078000CB0AF@prv-mh.provo.novell.com>
	<AADFC41AFE54684AB9EE6CBC0274A5D15F78ECE7@SHSMSX101.ccr.corp.intel.com>
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="===============2932860261701959689=="
Return-path: <xen-devel-bounces@lists.xen.org>
Received: from mail6.bemta4.messagelabs.com ([85.158.143.247])
	by lists.xen.org with esmtp (Exim 4.72)
	(envelope-from <thierry.laurion@gmail.com>) id 1aODCd-0004BX-HG
	for xen-devel@lists.xenproject.org; Tue, 26 Jan 2016 23:39:15 +0000
Received: by mail-ig0-f172.google.com with SMTP id h5so884457igh.0
	for <xen-devel@lists.xenproject.org>;
	Tue, 26 Jan 2016 15:39:11 -0800 (PST)
In-Reply-To: <AADFC41AFE54684AB9EE6CBC0274A5D15F78ECE7@SHSMSX101.ccr.corp.intel.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: "Tian, Kevin" <kevin.tian@intel.com>, Jan Beulich <JBeulich@suse.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>
List-Id: xen-devel@lists.xenproject.org

--===============2932860261701959689==
Content-Type: multipart/alternative; boundary=047d7b1117b73a4b81052a453147

--047d7b1117b73a4b81052a453147
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

It seems that IGD iommu is not completely deactivated, yes, since memory
corruption happens (graphic glitches and then system hang)

General iommu is still reported as being active by xen, as desired.

Thierry

Le mar. 26 janv. 2016 17:21, Tian, Kevin <kevin.tian@intel.com> a =C3=A9cri=
t :

> > From: Jan Beulich
> > Sent: Tuesday, January 26, 2016 8:28 PM
> >
> > >>> On 26.01.16 at 12:57, <thierry.laurion@gmail.com> wrote:
> > > Only dom0 talks directly to the i915 driver, other appvm being pv,
> which is
> > > why I put in question the complete deactivation of IGD by
> iommu=3Dno-igfx.
> > >
> > > Is there anything I can provide to troubleshoot?
> >
> > Hard to tell. The VT-d maintainers may be able to give you better
> > guidance.
> >
> > Jan
> >
>
> I'm a bit confused what's being exactly asked here. Did you mean
> that IOMMU is not actually disabled when you set iommu=3Dno-gfx?
>
> Thanks
> Kevin
>

--047d7b1117b73a4b81052a453147
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

It seems that IGD iommu is not completely deactivated, yes, since memory co=
rruption happens (graphic glitches and then system hang)<div><br></div><div=
>General iommu is still reported as being active by xen, as desired.</div><=
div><br></div><div>Thierry<br><br><div class=3D"gmail_quote"><div dir=3D"lt=
r">Le=C2=A0mar. 26 janv. 2016 17:21,=C2=A0Tian, Kevin &lt;<a href=3D"mailto=
:kevin.tian@intel.com">kevin.tian@intel.com</a>&gt; a =C3=A9crit=C2=A0:<br>=
</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-l=
eft:1px #ccc solid;padding-left:1ex">&gt; From: Jan Beulich<br>
&gt; Sent: Tuesday, January 26, 2016 8:28 PM<br>
&gt;<br>
&gt; &gt;&gt;&gt; On 26.01.16 at 12:57, &lt;<a href=3D"mailto:thierry.lauri=
on@gmail.com" target=3D"_blank">thierry.laurion@gmail.com</a>&gt; wrote:<br=
>
&gt; &gt; Only dom0 talks directly to the i915 driver, other appvm being pv=
, which is<br>
&gt; &gt; why I put in question the complete deactivation of IGD by iommu=
=3Dno-igfx.<br>
&gt; &gt;<br>
&gt; &gt; Is there anything I can provide to troubleshoot?<br>
&gt;<br>
&gt; Hard to tell. The VT-d maintainers may be able to give you better<br>
&gt; guidance.<br>
&gt;<br>
&gt; Jan<br>
&gt;<br>
<br>
I&#39;m a bit confused what&#39;s being exactly asked here. Did you mean<br=
>
that IOMMU is not actually disabled when you set iommu=3Dno-gfx?<br>
<br>
Thanks<br>
Kevin<br>
</blockquote></div></div>

--047d7b1117b73a4b81052a453147--


--===============2932860261701959689==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

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

--===============2932860261701959689==--