Re: [Intel-wired-lan] SRIOV on Intel x710 fail to get attached both at VM creation time and VM runtime

On 2018-03-01 19:40, Alexander Duyck wrote:

On Thu, Mar 1, 2018 at 8:12 AM,  [off-list ref] wrote:

quoted

+ intel-wired-lan@lists.osuosl.org


On 2018-03-01 21:41, poza@codeaurora.org wrote:

quoted

Hi All,

I am facing the following issue on kernel 4.14.14.

Enable SRIOV on Intel x710 card.
echo 32 > /sys/class/net/eth1/device/sriov_numvfs
start net_pool
virsh net-start intel_pool

case 1)
attach the VF while creatig VM:
virt-install --accelerate --import --disk /home/disk.img --network
network=intel_pool  --boot uefi --name poza-guest --os-type linux
--os-variant rhel7 --ram 8000 --vcpus 4

case 2)
create VM:
virt-install --accelerate --import --disk /home/disk.img --boot uefi
--name poza-guest --os-type linux --os-variant rhel7 --ram 8000
--vcpus 4
attach it:
virsh attach-interface --domain oza-guest --type network --source
intel_pool --target eth1

kernel logs:
[44287.825287] i40evf 0000:01:02.0: Unable to send opcode 2 to PF, err
I40E_ERR_QUEUE_EMPTY, aq_err OK
[44287.962640] i40e 0000:01:00.0: VF 0 still in reset. Try again.
error: Failed to attach interface
error: Cannot set interface MAC/vlanid to 52:54:00:e9:f1:b5/0 for
ifname eth1 vf 0: Resource temporarily unavailable


The same use case works with following card with the same kernel
version and rootfs.
Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

for details logs please have a look at
https://bugzilla.kernel.org/show_bug.cgi?id=198959

Regards,
Oza.

So the first question that jumps to mind is what is the firmware
version on the PF, ethtool -i should tell you. Are there any issues
bringing up the PF and getting it to pass traffic?

There's a patch on Intel-wired-lan titled "i40e: Fix attach VF to VM
issue" which should fix the problem. It's not upstream yet.

As a workaround you could unload/blacklist the i40evf driver in the
host.

  Stefan