-----Original Message-----
From: Intel-wired-lan [mailto:intel-wired-lan-boun...@lists.osuosl.org] On
Behalf Of Alexander Duyck
Sent: Tuesday, October 20, 2015 1:28 PM
To: netdev@vger.kernel.org; intel-wired-...@lists.osuosl.org
Subject: [Intel-wired-lan] [net PATCH v2] ixgbe: Reset interface after enabling
SR-IOV
Enabling SR-IOV and then bringing the interface up was resulting in the PF MAC
addresses getting into a bad state. Specifically the MAC address was enabled
for both VF 0 and the PF. This resulted in some odd behaviors such as VF 0
receiving a copy of the PFs traffic, which in turn enables the ability for VF 0
to spoof the PF.
A workaround for this issue appears to be to bring up the interface first and
then enable SR-IOV as this way the reset is then triggered in the existing code.
In order to correct this I have added a change to ixgbe_setup_tc where if the
interface is down we still will at least call ixgbe_reset so that the MAC
addresses for the device are reset to the correct pools.
Steps to reproduce issue:
modprobe ixgbe
echo 7 > /sys/bus/pci/devices/0000\:01\:00.1/sriov_numvfs
ifconfig enp1s0f1 up
ethregs -s 1:00.1 | grep MPSAR | grep -v 00000000
Result:
MPSAR[0] 00000081
MPSAR[254] 00000001
Expected Result, behavior after patch:
MPSAR[0] 00000080
MPSAR[254] 00000080
Signed-off-by: Alexander Duyck <adu...@mirantis.com>
---
Tested-by: Darin Miller <darin.j.mil...@intel.com>
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