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RE: [Xen-users] Simple Query on PCI passthrough I/O

To: "Mark Williamson" <mark.williamson@xxxxxxxxxxxx>, "Asim" <linkasim@xxxxxxxxx>
Subject: RE: [Xen-users] Simple Query on PCI passthrough I/O
From: "Nadolski, Ed" <Ed.Nadolski@xxxxxxx>
Date: Tue, 20 May 2008 15:27:05 -0600
Cc: "Joseph L. Casale" <JCasale@xxxxxxxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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Thread-topic: [Xen-users] Simple Query on PCI passthrough I/O
> > > * You need to be running a dom0 kernel in the guest with the PCI
> >
> > Whoa! I did not know this either. Again what are the reasons? Kindly
let > me
> > know.
> Regarding the kernel version.  You don't necessarily need to be
> running the same kernel as dom0.  But you do need to be running
> a dom0-capable kernel because domU-only kernels lack hardware support.

Hmm, I thought that meant the domU kernel had to run the pcifront driver
plus the native driver for the PCI device.  Is that right or have I
missed something?

Is there a way to tell if the domU is actually running pcifront?  My
/boot/config-2.6.18-53.el5xen shows CONFIG_XEN_PCIDEV_FRONTEND=y, but is
there a way to verify that it is actually in the running kernel?


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