From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: [PATCH] Make new PCI device probe work with older
	hypervisors
Date: Mon, 07 Jul 2008 15:57:44 +0100
Message-ID: <C497ED78.23A3B%keir.fraser@eu.citrix.com>
References: <18546.11791.824758.9232@gargle.gargle.HOWL>
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To: Espen Skoglund <espen.skoglund@netronome.com>
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On 7/7/08 15:54, "Espen Skoglund" <espen.skoglund@netronome.com> wrote:

> For machines supporting VT-d, removing the PCI enumeration from the
> VT-d code means that older dom0 kernels will not work with the latest
> hypervisor.  Is this unacceptable or is VT-d support considered an
> experimental feature?

If old dom0 kernels will not work with new Xen on any system supporting
VT-d, even when VT-d features are not going to be used (e.g., for device
passthrough), then that's not really acceptable.

If you have to upgrade your dom0 kernel to make use of new features which
VT-d enables, that's perfectly acceptable.

 -- Keir