Public bug reported:
Starting with the following commit, upstream kernel is enabling Intel
IOMMU related options by default:
792fb43ce2c9 ("iommu/vt-d: Enable Intel IOMMU scalable mode by
default")
We should follow upstream direction enabling
CONFIG_INTEL_IOMMU_DEFAULT_ON and
CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON.
A downside is that this change may introduce boot regressions on old
systems (especially those with buggy firmware).
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: Incomplete
** Tags: jammy
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1951440
Title:
Enable CONFIG_INTEL_IOMMU_DEFAULT_ON and
CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON on jammy 5.15
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