Re: [Xen-devel] [PATCH] Make new PCI device probe work with older hypervisors

[Espen Skoglund <espen.skoglund@xxxxxxxxxxxxx>]

[Keir Fraser]
> On 7/7/08 15:54, "Espen Skoglund" <espen.skoglund@xxxxxxxxxxxxx> 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.

Ok.  In that case you'd better revert 17975:a3e4840b1584 and make sure
that the PCI device enumration is never taken out of Xen.

        eSk







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