Hi,
You told me " you need to set up Xen so that the driver is allowed to restore
the HCA and PCI bridge config space."
But how can I set up xen to allow the driver to restore the HCA and pci config
space?
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> Subject: Re: [ofa-general] Infiniband with Xen
> Date: Thu, 21 May 2009 15:33:19 -0700
>
> > I have tried to also to passthrough the pci bridge but It doesn't work, I
> got that with de dmesg on my Dom0 :
> >
> > 1297.293367] pciback: vpci: 0000:04:00.0: assign to virtual slot 0 (
> this is HCA)
> > [ 1297.295538] pciback: vpci: 0000:03:07.1: assign to virtual slot 1 (
> This is eth1)
> > [ 1297.298346] pciback: vpci: 0000:03:08.0: assign to virtual slot 2 (
> this is the HCA bridge)
> > [ 1298.655743] pciback 0000:03:08.0: Driver tried to write to a read-only
> configuration space field at offset 0x3e, size 2. This may be harmless, but
> if you have problems with your device:
> > [ 1298.655747] 1) see permissive attribute in sysfs
> > [ 1298.655749] 2) report problems to the xen-devel mailing list along with
> details of your device obtained from lspci.
>
> Yes, the driver does set the PCI bridge back up after resetting the HCA
> (to restore all the configuration values that are lost during reset).
> So you need to set up Xen so that the driver is allowed to restore the
> HCA and PCI bridge config space.
>
> Also it's not clear to me from these messages whether the HCA is put
> into the domU PCI topology as being under the PCI bridge -- that is
> probably required for the driver to work.
>
> - R.
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