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Message-ID: <20081201154603.GB12816@amd.com>
Date: Mon, 1 Dec 2008 16:46:03 +0100
From: Joerg Roedel <joerg.roedel@....com>
To: Avi Kivity <avi@...hat.com>
CC: Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
weidong.han@...el.com, linux-kernel@...r.kernel.org,
iommu@...ts.linux-foundation.org, mingo@...hat.com,
amit.shah@...hat.com
Subject: Re: [PATCH 3/9] add frontend implementation for the IOMMU API
On Mon, Dec 01, 2008 at 04:33:11PM +0200, Avi Kivity wrote:
> Joerg Roedel wrote:
> > Hmm, is there any hardware IOMMU with which we can't emulate domains by
> > partitioning the IO address space? This concept works for GART and
> > Calgary.
> >
> >
>
> Is partitioning secure? Domain X's user could program its hardware to
> dma to domain Y's addresses, zapping away Domain Y's user's memory.
No its not secure. But this problem exists with pv-dma without iommu
too.
Joerg
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