Open Source Summit Japan

In Qemu, assigned PCI devices are go through vfio_pci now, but one of important features still is not implemented: AER error recovery, due to its complexity. When error happens, it causes a Qemu VM to stop. A single pass-through device's error leads to a whole VM failure, that is not quite reasonable.

Fujitsu team focused on this topic two years ago, but Qemu community doesn't have a mature solution for this problem until now. Fujitsu has sent a dozens of patchsets, finally got some agreement and made some
achievement.

In this presentation, Cao jin will review the two phases of development, introduce the functionality arch of the feature, the difficult problem found in development, and current status.