linux-kernel - Re: [PATCH 2/4] iommu/vt-d: Don't consider copied context entries as present

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Message-ID: <20150611145138.GI20384@8bytes.org>
Date:	Thu, 11 Jun 2015 16:51:39 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	Joerg Roedel <jroedel@...e.de>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	iommu@...ts.linux-foundation.org, zhen-hual@...com, bhe@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] iommu/vt-d: Don't consider copied context entries as
 present

On Thu, Jun 11, 2015 at 04:25:54PM +0200, Joerg Roedel wrote:
> Okay, reading the VT-d spec again, the extended context-entry table seem
> to exist in parallel to the current context-entry table, right? So this
> patch should still work, even with extended entries present.

I found section 3.4.4. of the Spec, and learned that the two tables do
not exist in parallel. The extended table ist just split into two parts
because the context entry was doubled in size.


	Joerg

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