On 3/28/2023 10:50 AM, Baolu Lu wrote: > On 3/28/23 7:21 AM, Jacob Pan wrote: >> On VT-d platforms, RID_PASID is used for DMA request without PASID. We >> should not treat RID_PASID special instead let it be allocated from the >> global SVA PASID number space. > > It's same to AMD and ARM SMMUv3, right? They also need an explicit > reservation of PASID 0. Yes for AMD driver. (Requests from the I/O device without a PASID are treated as if they have PASID of 0). -Vasant
