Hi Greg,
I believe I have to pass through the PF because I need to support an MTU
of 1600 within the VM which from what I've read is impossible with
SR-IOV, is that correct? With Debian Squeeze PF pass through seems to
work (Detects card and SFPs), I assume per port PF pass through is known
to work but not officially supported?
Thanks,
Rob
-Original Message-
From: Rose, Gregory V [mailto:gregory.v.r...@intel.com]
Sent: 24 March 2011 16:31
To: Robert Dunkley; E1000-devel@lists.sourceforge.net
Cc: Linux NICS
Subject: RE: 82599EB - PCI Passthrough gives Error -5
-Original Message-
From: Robert Dunkley [mailto:rob...@saq.co.uk]
Sent: Thursday, March 24, 2011 1:22 AM
To: E1000-devel@lists.sourceforge.net
Cc: Linux NICS
Subject: [E1000-devel] 82599EB - PCI Passthrough gives Error -5
I'm trying to setup some X520-DA2s with one copper cable and one Intel
LR SFP in each for standard PF PCI device pass through. The same
systems are working OK with virtual function pass through of 82576
ports so I think the Xen configuration is fine. The 82599EB works
correctly in Dom0, appears in pci assignable devices when hidden and
is set as permissive in pciback. All messages in Dom0 seem encouraging
but the paravirt Domu just gives error -5 when using the 3.2.10 driver
or the Redhat supplied drivers. Kernel is RHEL 2.6.18-247.
Error -5 is EIO. Without more information it's hard for me to determine
what your exact problem is but Intel does not officially support pass
through (aka Direct Assignment) of PF devices to guests. Vendors who
support that feature do so at their own risk. We would suggest using
the SR-IOV feature to pass a virtual function through to a guest and
that is our only supported configuration.
Regards,
- Greg
Greg Rose
LAN Access Division
Intel Corp.
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