From: Avi Kivity <avi@redhat.com>
To: Marty Kurtz <marty.kurtz@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: 1:1 mapping
Date: Wed, 02 Dec 2009 15:06:36 +0200 [thread overview]
Message-ID: <4B16665C.5080005@redhat.com> (raw)
In-Reply-To: <9c0acdb40911161539j167e7083i1d81f149f3d4620@mail.gmail.com>
On 11/17/2009 01:39 AM, Marty Kurtz wrote:
> Hi all
>
> I work in the embedded world and am evaluating potential hypervisors
> and kvm looks suitable for what we want
> However, I see some old references to 1:1 mapping which would allow a
> guest to see a PCI device even without an IOMMU
>
> Is this currently incorporated into the qemu-0.11 and kvm-88 release?
>
>
No.
> Is dma=none equivalent to this by any chance or is it only meant for
> devices that do not use DMA?
>
> If 1:1 mapping is not in the tree, is there a reasonable chance that
> the old patch would work with the latest?
>
The interest in 1:1 has waned as more hardware now has an iommu, and
because 1:1 can only support one guest, and insecurely at that. The
patches may work, but are unlikely to make it upsteam now.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2009-12-02 13:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-16 23:39 1:1 mapping Marty Kurtz
2009-12-02 13:06 ` Avi Kivity [this message]
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