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From: Joerg Roedel <joro@8bytes.org>
To: Joerg Roedel <jroedel@suse.de>
Cc: David Woodhouse <dwmw2@infradead.org>,
	iommu@lists.linux-foundation.org, zhen-hual@hp.com,
	bhe@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/4] iommu/vt-d: Don't consider copied context entries as present
Date: Thu, 11 Jun 2015 16:51:39 +0200	[thread overview]
Message-ID: <20150611145138.GI20384@8bytes.org> (raw)
In-Reply-To: <20150611142554.GG16345@suse.de>

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


WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
To: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
	zhen-hual-VXdhtT5mjnY@public.gmane.org,
	David Woodhouse <dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
Subject: Re: [PATCH 2/4] iommu/vt-d: Don't consider copied context entries as present
Date: Thu, 11 Jun 2015 16:51:39 +0200	[thread overview]
Message-ID: <20150611145138.GI20384@8bytes.org> (raw)
In-Reply-To: <20150611142554.GG16345-l3A5Bk7waGM@public.gmane.org>

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

  parent reply	other threads:[~2015-06-11 14:51 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-11 13:47 [PATCH 0/4] More cleanups and fixes for Intel VT-d Joerg Roedel
2015-06-11 13:47 ` Joerg Roedel
2015-06-11 13:47 ` [PATCH 1/4] iommu/vt-d: Remove iommu_attach_domain_with_id() Joerg Roedel
2015-06-11 13:47   ` Joerg Roedel
2015-06-11 13:47 ` [PATCH 2/4] iommu/vt-d: Don't consider copied context entries as present Joerg Roedel
2015-06-11 13:47   ` Joerg Roedel
2015-06-11 14:07   ` David Woodhouse
2015-06-11 14:07     ` David Woodhouse
2015-06-11 14:12     ` Joerg Roedel
2015-06-11 14:12       ` Joerg Roedel
2015-06-11 14:19       ` David Woodhouse
2015-06-11 14:19         ` David Woodhouse
2015-06-11 14:25     ` Joerg Roedel
2015-06-11 14:25       ` Joerg Roedel
2015-06-11 14:44       ` David Woodhouse
2015-06-11 15:12         ` David Woodhouse
2015-06-11 14:51       ` Joerg Roedel [this message]
2015-06-11 14:51         ` Joerg Roedel
2015-06-11 13:47 ` [PATCH 3/4] iommu/vt-d: Remove unmap_device_dma() Joerg Roedel
2015-06-11 13:47   ` Joerg Roedel
2015-06-11 13:47 ` [PATCH 4/4] iommu/vt-d: Make sure si_domain is allocated for kdump kernel Joerg Roedel
2015-06-11 13:47   ` Joerg Roedel
2015-06-11 15:54 ` [PATCH 0/4] More cleanups and fixes for Intel VT-d David Woodhouse
2015-06-11 15:54   ` David Woodhouse
2015-06-12  7:31   ` Joerg Roedel
2015-06-12 20:29   ` Joerg Roedel
2015-06-12 20:29     ` Joerg Roedel

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