Hi, On 23/07/18 15:43, Zhongmiao wrote: > Yeah, I haven't tested smmu eventq overflow , so i'm not sure if there > is any problem with smmu eventq. However, the code shows that there is also > a problem after the smmu eventq overflows. ^_^…….
There really shouldn't be any problem with the eventq. Handling the event overflow in my patch is mostly cosmetic and can be removed. See the Event queue overflow section of the SMMUv3 specification (IHI0070B): "Note: In terms of delivering events, a queue in an unacknowledged overflow state does not behave any differently to normal queue state. If software were to consume events and free space but leave overflow unacknowledged, new events could be recorded." Thanks, Jean _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
