linux-kernel - Re: WARNING: at drivers/iommu/dmar.c:484 warn_invalid

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Message-ID: <20130711190054.GC24833@sequoia2.sous-sol.org>
Date:	Thu, 11 Jul 2013 12:00:54 -0700
From:	Chris Wright <chrisw@...s-sol.org>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Chris Wright <chrisw@...s-sol.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	David Woodhouse <dwmw2@...radead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"open list:INTEL IOMMU (VT-d)" <iommu@...ts.linux-foundation.org>
Subject: Re: WARNING: at drivers/iommu/dmar.c:484 warn_invalid_dmar with
 Intel Motherboard

* Guenter Roeck (linux@...ck-us.net) wrote:
> On Tue, Jul 09, 2013 at 04:22:52PM -0700, Chris Wright wrote:
> > One thing I've seen is the BIOS zeroing the base register address when
> > VT-d is disabled in BIOS.  So, Guenter, a "fix" may be simply enabling
> > VT-d in the BIOS.
> > 
> Ah, yes, I think I may have that disabled. I'll check it tonight.

Did you find out if BIOS change fixed this?

thanks,
-chris
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