Hi ,
>"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." Yeah, I agree with you . But I test priq , It's going to be a problem. And See the PRI queue overflow section of the SMMUv3 specification (IHI0070A): " Note: On detection of overflow, ARM recommends that software processes the received PRI queue entries as quickly as possible, and follows this with a single write of SMMU_PRIQ_CONS to simultaneously move on the RD pointer and acknowledge receipt of the overflow condition by setting OVACKFLG to the value read from OVFLG." Thanks, Miao _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
