From: David Woodhouse <dwmw2@infradead.org>
To: Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org, zhen-hual@hp.com,
bhe@redhat.com, linux-kernel@vger.kernel.org,
Joerg Roedel <jroedel@suse.de>
Subject: Re: [PATCH 2/4] iommu/vt-d: Don't consider copied context entries as present
Date: Thu, 11 Jun 2015 15:07:02 +0100 [thread overview]
Message-ID: <1434031622.3907.40.camel@infradead.org> (raw)
In-Reply-To: <1434030463-942-3-git-send-email-joro@8bytes.org>
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On Thu, 2015-06-11 at 15:47 +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@suse.de>
>
> Hide the copied context entries from the IOMMU driver by
> considering them as non-present. This is implemented by
> setting the first AVL bit (bit 67) in the context entry to
> one. If this bit is set, the context_present() function
> returns false.
>
> Signed-off-by: Joerg Roedel <jroedel@suse.de>
In the extended context entry, bit 67 is the PGE bit. There are no bits
which are available to software, to my knowledge.
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation
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next prev parent reply other threads:[~2015-06-11 14:07 UTC|newest]
Thread overview: 15+ 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 ` [PATCH 1/4] iommu/vt-d: Remove iommu_attach_domain_with_id() 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 14:07 ` David Woodhouse [this message]
2015-06-11 14:12 ` Joerg Roedel
2015-06-11 14:19 ` David Woodhouse
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
2015-06-11 13:47 ` [PATCH 3/4] iommu/vt-d: Remove unmap_device_dma() 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 15:54 ` [PATCH 0/4] More cleanups and fixes for Intel VT-d David Woodhouse
2015-06-12 7:31 ` Joerg Roedel
2015-06-12 20:29 ` Joerg Roedel
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