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I added this: In section "3.9.1 ATS Interface" of F.b the specification says: When the SMMU returns an ATS Translation Completion for a request that had a PASID, the Global bit of the Translation Completion Data Entry must be zero. Even though it faithfully forwards the G bit through to the ATS invalidation command there is no way to create G mappings so there is never any need to send a G invalidation. Thus don't expose global in the new helpers and leave CMDQ_ATC_0_GLOBAL unused. Jason