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[Xen-devel] VT-d on Intel S3420GPLX

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Subject: [Xen-devel] VT-d on Intel S3420GPLX
From: "Michael A. Collins" <mike@xxxxxxxxxxx>
Date: Wed, 08 Dec 2010 11:34:36 -0500
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I have successfully booted xen on Fedora 14 x86_64 with iommu=force 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
created igb.conf under /etc/modprobe.d with options igb max_vfs=7
added blacklist igbvf to /etc/modprobe.d/blacklist.conf

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


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