** Also affects: linux-nvidia (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux-nvidia (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-nvidia-6.2 (Ubuntu Noble)
Importance: Undecided
Status: New
** No longer affects: linux-nvidia-6.2 (Ubuntu Noble)
** Changed in: linux-nvidia (Ubuntu Noble)
Status: New => Fix Committed
** Changed in: linux-nvidia (Ubuntu)
Status: New => Invalid
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Packages, which is subscribed to linux-nvidia in Ubuntu.
https://bugs.launchpad.net/bugs/2031320
Title:
Pull-request to address ARM SMMU issue
Status in linux-nvidia package in Ubuntu:
Invalid
Status in linux-nvidia-6.2 package in Ubuntu:
Fix Released
Status in linux-nvidia source package in Noble:
Fix Committed
Bug description:
[Issue]
When an iommu_domain is set to IOMMU_DOMAIN_IDENTITY, the driver would
skip the allocation of a CD table and set the CONFIG field of the STE
to STRTAB_STE_0_CFG_BYPASS. This works well for devices that only have
one substream, i.e. PASID disabled.
However, there could be a use case, for a pasid capable device, that
allows bypassing the translation at the default substream while still
enabling the pasid feature, which means the driver should not skip the
allocation of a CD table nor simply bypass the CONFIG field. Instead,
the S1DSS field should be set to STRTAB_STE_1_S1DSS_BYPASS and the
SHCFG field should be set to STRTAB_STE_1_SHCFG_INCOMING.
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