linux-kernel - Re: [regression, bisected] fails to boot on Dell Optiplex 760 with VT-d enabled

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Message-ID: <20090817232937.GK24885@sequoia.sous-sol.org>
Date:	Mon, 17 Aug 2009 16:29:37 -0700
From:	Chris Wright <chrisw@...s-sol.org>
To:	Faidon Liambotis <paravoid@...ian.org>
Cc:	Chris Wright <chrisw@...s-sol.org>,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	David Woodhouse <David.Woodhouse@...el.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [regression, bisected] fails to boot on Dell Optiplex 760 with
	VT-d enabled

* Faidon Liambotis (paravoid@...ian.org) wrote:
> As an observation, David's patch is checking if *both* iommu->cap and
> iommu->ecap are -1, while yours checks for either. You're also checking
> for ver. Obviously, I have no idea which of the two is more correct.

David's looks fine to me, and as a bonus it's already queued up ;-)
None of those registers should return -1.

thanks,
-chris
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