Public bug reported:
[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.
[Regression Potential]
None.
** Affects: linux (Ubuntu)
Importance: Critical
Status: New
** Tags: cn88xx
** 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.
+ 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.
[Regression Potential]
None.
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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.
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