I have PCI passthrough working now for the Intel X540-AT2 NIC and is
seen inside debian 8 vm.

# lspci

00:00.0 Host bridge: Network Appliance Corporation Device 1275
00:04.0 SCSI storage controller: Red Hat, Inc Virtio block device
00:05.0 Ethernet controller: Red Hat, Inc Virtio network device
00:06.0 Ethernet controller: Intel Corporation Ethernet Controller
10-Gigabit X540-AT2 (rev 01)
00:1f.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]

However, on loading the module the kernel gives the error

#modprobe ixgbe

[   34.929546] ixgbe: Intel(R) 10 Gigabit PCI Express Network Driver -
version 3.19.1-k
[   34.929549] ixgbe: Copyright (c) 1999-2014 Intel Corporation.
[   34.929706] ixgbe 0000:00:06.0: can't derive routing for PCI INT A
[   34.929708] ixgbe 0000:00:06.0: PCI INT A: no GSI
[   34.930354] ixgbe 0000:00:06.0: Adapter removed
[   34.931710] ixgbe 0000:00:06.0: can't derive routing for PCI INT A
[   34.931717] ixgbe: probe of 0000:00:06.0 failed with error -5

Any idea what could be the issue?



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