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 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1785282 Title: arm-smmu-v3 arm-smmu-v3.1.auto: failed to allocate MSIs Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: In Progress Bug description: [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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1785282/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp