** Description changed:
[Impact]
- There is an issue with hypervisor host side mlx5 driver operation on
Bluefield devices in kernels <=5.16
+ There is an issue with hypervisor host side mlx5 driver operation on
+ Bluefield devices in kernels <=5.16
- Copied from patch description:
+ From patch description:
When using libvirt to passthrough VF to VM it will always set the VF vlan
to 0 even if user didn’t request it, this will cause libvirt to fail to
boot in case the PF isn't eswitch owner.
Example of such case is the DPU host PF which isn't eswitch manager, so
any attempt to passthrough VF of it using libvirt will fail.
[Fix]
* 7846665d net/mlx5e: Unblock setting vid 0 for VF in case PF isn't
- eswitch manager
+ eswitch manager
This patch can be cherry-picked into Impish and newer kernels, but it
requires some backport work on F/H due to they're missing commit
b55b3538 that split the legacy code out.
[Test]
Test kernels can be found here:
F: https://people.canonical.com/~phlin/kernel/lp-1957753-mlx5e/F/
H: https://people.canonical.com/~phlin/kernel/lp-1957753-mlx5e/H/
I: https://people.canonical.com/~phlin/kernel/lp-1957753-mlx5e/I/
J: https://people.canonical.com/~phlin/kernel/lp-1957753-mlx5e/J/
- Kernels tested by Dmitrii Shcherbakov with positive feedback.
+ Kernels tested on a SUT with this device by Dmitrii Shcherbakov, test
+ passed with positive feedback.
[Where problems could occur]
- If this patch is erroneous, it might cause issue to this mlx5 driver with
certain operations (passing vlan 0).
+ If this patch is erroneous, it might cause issue to this mlx5 driver
+ with certain operations (setting vid 0). And other programs such as
+ libvirt that depends on this return value might be affected as well.
+
[Original Bug Description]
There is an issue with hypervisor host side mlx5 driver operation on
Bluefield devices in kernels <=5.16 that was recently fixed in master with a
one-liner:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7846665d3504812acaebf920d1141851379a7f37
It would be good to have this fix in Focal+ kernels.
This is not needed in https://bugs.launchpad.net/ubuntu/+source/linux-
bluefield since it's used at the DPU side whereas the issue in question
affects the hypervisor side.
** Changed in: linux (Ubuntu Focal)
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
** Changed in: linux (Ubuntu Hirsute)
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
** Changed in: linux (Ubuntu Jammy)
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
** Changed in: linux (Ubuntu Impish)
Assignee: (unassigned) => Po-Hsu Lin (cypressyew)
** Changed in: linux (Ubuntu Focal)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu Hirsute)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu Impish)
Status: Confirmed => In Progress
** Changed in: linux (Ubuntu Jammy)
Status: Confirmed => In Progress
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https://bugs.launchpad.net/bugs/1957753
Title:
net/mlx5e: EPERM on vlan 0 programming
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