** Also affects: ubuntu-release-notes
Importance: Undecided
Status: New
** Tags added: regression-release
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https://bugs.launchpad.net/bugs/1988806
Title:
Add support for mdev_set_iommu_device() kABI in Ubuntu 22.10 kernel
Status in Release Notes for Ubuntu:
New
Status in linux package in Ubuntu:
Triaged
Status in linux-hwe-5.19 package in Ubuntu:
Invalid
Status in linux source package in Jammy:
Invalid
Status in linux-hwe-5.19 source package in Jammy:
Fix Released
Status in linux source package in Kinetic:
Fix Released
Status in linux-hwe-5.19 source package in Kinetic:
Invalid
Status in linux source package in Lunar:
Triaged
Status in linux-hwe-5.19 source package in Lunar:
Invalid
Bug description:
With below commit in 5.16 upstream kernel, support for
mdev_set_iommu_device() kABI was removed from kernel as there were no
in-tree drivers making use of the kABI.
fda49d97f2c4 ("vfio: remove the unused mdev iommu hook")
This kABI is used by SRIOV based Nvidia vGPU on Ubuntu 22.04. Ampere+
(SRIOV based) Nvidia vGPU use kernel's mdev framework and use this
kABI to pin all guest memory during VM boot.
As HWE kernel (for Ubuntu 22.04) will switch to 5.19 upstream kernel,
it will not include this kABI and as a result will break SRIOV based
Nvidia vGPU. So, filing this bug to request to have a custom patch in
HWE kernel which doesn't remove the support for
mdev_set_iommu_device() kABI.
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