Re: [Xen-devel] Intel S3420GPLX VT-d VF question

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Tue, Dec 07, 2010 at 11:52:24PM -0500, Michael A. Collins wrote:
> I have successfully booted xen on Fedora 14 x86_64 with iommu=force

Ok.. Um, what Fedora kernel are we taking about here? Do you have
the full serial log?
> on the kernel line, I can unbind a pci device and rebind to pci-stub
> and see it with xm pci-list-assignable-devices.  That's cool.  Now I
> have an Intel 82576 dual-port ET Adapter that supports SR-IOV and
> started configuring everything to enable it's virtual functions:
> added pci_pt_e820_access=on to the module line that contains the
> vmlinuz

Why? It doesn't automatically load without that parameter?
> created igb.conf under /etc/modprobe.d with options igb max_vfs=7
> added blacklist igbvf to /etc/modprobe.d/blacklist.conf

Why blacklist it?
> 
> I was under the impression that I should see some kind of message
> about MMCONFIG in xm dmesg, but there isn't anything.  I do a xm
> dmesg | grep -i pci and it finds nothing with MMCONFIG.  I guess my

Huh? Why? Do you see the 7 ethernet PCI device being created?

> next question is what do I do next?  How do I troubleshoot further?

What are you trying to troubleshoot? Did you lspci output change
after you loaded the igbvf?

> Below is the VT-d messages from xm dmesg:
> (XEN) Intel VT-d Snoop Control supported.
> (XEN) Intel VT-d DMA Passthrough not supported.
> (XEN) Intel VT-d Queued Invalidation supported.
> (XEN) Intel VT-d Interrupt Remapping not supported.
> 
> Does MMCONFIG have something to do with the fact the Interrupt
> Remapping not supported message is displayed?

No. It just means your VT-D chipset does not support interrupt
remapping.

> Mike
> 
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