Public bug reported:
[Impact]
ARM systems w/ an SMMUv3 that uses MSI control interrupts fail to initialize
them, which can e.g. prevent detected device errors from being reported.
[Test Case]
dmesg | grep "failed to allocate MSIs"
grep arm-smmu-v3 /proc/interrupts
[Fix]
Upstream fixes that add support for the SMMUv3 device ID mapping index - which
is required for MSI support - need to be included.
[Regression Risk]
By enabling these interrupts, we're allowing code to run that previously
didn't, which could potentially do bad things. However, the interrupt handlers
look pretty simple/straightforward, and I haven't seen any problems on a system
that uses them w/ the fixes applied.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: Fix Released
** Affects: linux (Ubuntu Bionic)
Importance: Undecided
Assignee: dann frazier (dannf)
Status: In Progress
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Status: New => In Progress
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => dann frazier (dannf)
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1785282
Title:
arm-smmu-v3 arm-smmu-v3.1.auto: failed to allocate MSIs
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