linux-kernel - Re: [PATCH 0/12] Factor VT-d KVM functions into a generic API (with multiple device assignment support)

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Message-ID: <20081203075049.GN29705@8bytes.org>
Date:	Wed, 3 Dec 2008 08:50:49 +0100
From:	Joerg Roedel <joro@...tes.org>
To:	Greg KH <gregkh@...e.de>
Cc:	Joerg Roedel <joerg.roedel@....com>, kvm@...r.kernel.org,
	Han Weidong <weidong.han@...el.com>,
	linux-kernel@...r.kernel.org, Alexander Graf <agraf@...e.de>,
	iommu@...ts.linux-foundation.org, Ingo Molnar <mingo@...hat.com>,
	Avi Kivity <avi@...hat.com>
Subject: Re: [PATCH 0/12] Factor VT-d KVM functions into a generic API (with multiple device assignment support)

On Tue, Dec 02, 2008 at 07:44:05PM -0800, Greg KH wrote:
> On Tue, Dec 02, 2008 at 02:01:11PM +0100, Joerg Roedel wrote:
> > Hi,
> > 
> > this patch series makes the current KVM device passthrough code generic
> > enough so that other IOMMU implementation can also plug into this code.
> > It works by factoring the functions Vt-d code exports to KVM into a
> > generic interface which allows different backends.
> > 
> > This is the second version of the patchset. The most important change to
> > the previous version is that this patchset was rebased to the improved
> > API from Han Weidong which supports multiple devices per IOMMU domain.
> > 
> > For completeness, this series also includes the patches from Han with
> > some cleanups. So this patchset can be applied on current avi/master
> > tree.
> 
> Have you tried porting any of the current iommu controllers to this new
> framework to see if it works properly for them?

It works currently for VT-d. I also port it to AMD IOMMU currently. With
some extensions (offset for start address, flags and size limitation) it
is also suitable for IOMMUs like GART or similar ones.

Joerg
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