Not to be fixed
Created: Nov 24, 2013
Updated: Apr 19, 2018
Resolved Date: Apr 17, 2018
Found In Version: 6.0
Severity: Severe
Applicable for: Wind River Linux 6
Component/s: Kernel
The PCI SR-IOV ethernet device cannot be found in the guest when the virtio device (de:ef:be:d9:8e:1a) is there.
In the KVM guest:
Wind River Linux 6.0.0.0 localhost console
localhost login: root
Password:
root@localhost:~# ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
root@localhost:~# ifconfig -a
eth0 Link encap:Ethernet HWaddr de:ef:be:d9:8e:1a
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
sit0 Link encap:UNSPEC HWaddr 00-00-00-00-30-30-30-00-00-00-00-00-00-00-00-00
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
If ONLY one SR-IOV device was assigned to the KVM, without viritio device, it can work well. For an example, to run the following command. And the SR-IOV ethernet device can be found.
/usr/bin/qemu-system-x86_64 -enable-kvm -smp 8 -m 1024 -device pci-assign,host=0e:00.0 -drive file=/boot/guest_raw.test,if=virtio -kernel /boot/guest.kernel -append 'root=/dev/vda rw console=ttyS0,115200 ' -nographic
root@localhost:~# ifconfig -a
eth0 Link encap:Ethernet HWaddr 52:54:00:12:34:56
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
sit0 Link encap:UNSPEC HWaddr 00-00-00-00-30-30-30-00-00-00-00-00-00-00-00-00
NOARP MTU:1480 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
1. Build KVM host and guest kernels and rootfs
/wrlinux-6/wrlinux/configure \
--enable-board=intel-x86-64 \
--enable-kernel=standard \
--enable-rootfs=glibc_std \
--with-template=feature/kvm \
--enable-jobs=18 \
--enable-parallel-pkgbuilds=18
make fs
/wrlinux-6/wrlinux/configure \
--enable-board=x86-64-kvm-guest \
--enable-kernel=standard \
--enable-rootfs=glibc_std \
--enable-jobs=18 \
--enable-parallel-pkgbuilds=18
make fs
2. Load kernel and rootfs to the target
There are two ethernet networking cards on the target. One is I350, the other is 82576.
3. To run the following commands and start the KVM guest with networking devices assigned.
rmmod kvm-intel
rmmod kvm
modprobe kvm allow_unsafe_assigned_interrupts=1
modprobe kvm-intel
modprobe pci_stub
modprobe igb max_vfs=7
echo "8086 1521" > /sys/bus/pci/drivers/pci-stub/new_id
echo "0000:0e:00.0" > /sys/bus/pci/devices/0000:0e:00.0/driver/unbind
echo "0000:0e:00.0" > /sys/bus/pci/drivers/pci-stub/bind
/usr/bin/qemu-system-x86_64 -enable-kvm -smp 8 -m 1024 -device pci-assign,host=0e:00.0 -net nic,macaddr=de:ef:be:d9:8e:1a,model=virtio -net tap,script=/etc/qemu-ifup.tap -drive file=/boot/guest_raw.test,if=virtio -kernel /boot/guest.kernel -append 'root=/dev/vda rw console=ttyS0,115200 ' -nographic
