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From: Chris Wright <chrisw@sous-sol.org>
To: Mu Lin <mul@juniper.net>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: device passthrough
Date: Fri, 28 May 2010 12:33:01 -0700	[thread overview]
Message-ID: <20100528193301.GO8301@sequoia.sous-sol.org> (raw)
In-Reply-To: <3E6CB99C2F38864E95D6AA1B707C0C70572D1C0E62@EMBX02-HQ.jnpr.net>

* Mu Lin (mul@juniper.net) wrote:
> Is there any method to directly assign a device to Guest OS  without VT-d?

Assuming you mean a PCI device, no, there isn't.

Without an IOMMU[1] you can't directly assign a PCI device to a guest
(nor is it safe).  There have been patches floating around to allow
this, but they don't maintain secure isolation.

thanks,
-chris

[1] VT-d is an Intel chipset feature, so you could certainly do it on an
AMD platform that has an AMD IOMMU.

  reply	other threads:[~2010-05-28 19:33 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-28  7:37 device passthrough Mu Lin
2010-05-28 19:33 ` Chris Wright [this message]
2010-05-28 22:08   ` Mu Lin
2010-05-28 22:55     ` Chris Wright

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