I was able to pass through a PCIE virtual function NIC from the host to
the guest. No kernel panics seen in the host.
-- Host with kernel patches --
ubuntu@seuss:~$ ethtool -i enP2p1s0f1
driver: thunder-nicvf
version: 1.0
firmware-version:
expansion-rom-version:
bus-info: 0002:01:00.1
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no
ubuntu@seuss:~$ readlink /sys/bus/pci/devices/0002\:01\:00.1/driver
../../../../../../../bus/pci/drivers/thunder-nicvf
ubuntu@seuss:~$
ubuntu@seuss:~$ virsh nodedev-detach pci_0002_01_00_1
Device pci_0002_01_00_1 detached
ubuntu@seuss:~$ readlink /sys/bus/pci/devices/0002\:01\:00.1/driver
../../../../../../../bus/pci/drivers/vfio-pci
ubuntu@seuss:~$
-- Bionic Guest --
ubuntu@vm1:~$ lspci -k
00:00.0 Host bridge: Red Hat, Inc. QEMU PCIe Host bridge
Subsystem: Red Hat, Inc QEMU PCIe Host bridge
00:01.0 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
Kernel driver in use: pcieport
Kernel modules: shpchp
00:01.1 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
Kernel driver in use: pcieport
Kernel modules: shpchp
00:01.2 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
Kernel driver in use: pcieport
Kernel modules: shpchp
00:01.3 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
Kernel driver in use: pcieport
Kernel modules: shpchp
00:01.4 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
Kernel driver in use: pcieport
Kernel modules: shpchp
00:01.5 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
Kernel driver in use: pcieport
Kernel modules: shpchp
01:00.0 Ethernet controller: Red Hat, Inc Virtio network device (rev 01)
Subsystem: Red Hat, Inc Virtio network device
Kernel driver in use: virtio-pci
02:00.0 Communication controller: Red Hat, Inc Virtio console (rev 01)
Subsystem: Red Hat, Inc Virtio console
Kernel driver in use: virtio-pci
03:00.0 SCSI storage controller: Red Hat, Inc Virtio block device (rev 01)
Subsystem: Red Hat, Inc Virtio block device
Kernel driver in use: virtio-pci
04:00.0 SCSI storage controller: Red Hat, Inc Virtio block device (rev 01)
Subsystem: Red Hat, Inc Virtio block device
Kernel driver in use: virtio-pci
05:00.0 Ethernet controller: Cavium, Inc. THUNDERX Network Interface Controller
virtual function (rev 09)
Subsystem: Cavium, Inc. THUNDERX Network Interface Controller virtual
function
Kernel driver in use: thunder-nicvf
Kernel modules: nicvf
ubuntu@vm1:~$
ubuntu@vm1:~$ ethtool -i enp5s0
driver: thunder-nicvf
version: 1.0
firmware-version:
expansion-rom-version:
bus-info: 0000:05:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no
ubuntu@vm1:~$
** Description changed:
[Impact]
Using vfio-pci on a combination of cn8xxx and some PCI devices results in a
kernel panic. This is triggered by issuing a bus or a slot reset on the PCI
device.
[Fix]
The following patches checks indicate that the reset is not possible
preventing the kernel panic.
357027786f35 PCI: Avoid bus reset if bridge itself is broken
822155100e58 PCI: Mark Cavium CN8xxx to avoid bus reset
33ba90aa4d44 PCI: Avoid slot reset if bridge itself is broken
These patches are already in Bionic, we need these patches in Artful so
that xenial linux-hwe also has the fix. The platforms of interest were
certified with Xenial and linux-hwe, so we are interested in fixing this
only in Artful.
[Test]
- Artful Host with Artful/bionic guests
- Pass though PCI device (vfio-pci) from Artful to bionic and make sure its
usable.
- The device should pass through and not cause a kernel panic.
+ A test kernel is available in ppa:manjo/lp1770254
+
[Regression Potential]
None.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1770254
Title:
[SRU][Artful] using vfio-pci on a combination of cn8xxx and some PCI
devices results in a kernel panic.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1770254/+subscriptions
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