On Thu, Oct 27, 2022 at 03:50:38PM +0800, Jason Wang wrote: > Hi All: > > This series tries to introduce PASID support for Intel IOMMU. The work > is based on the previous scalabe mode support by implement the > ECAP_PASID. A new "x-pasid-mode" is introduced to enable this > mode. All internal vIOMMU codes were extended to support PASID instead > of the current RID2PASID method. The code is also capable of > provisiong address space with PASID. Note that no devices can issue > PASID DMA right now, this needs future work. > > This will be used for prototying PASID based device like virtio or > future vPASID support for Intel IOMMU. > > Test has been done with the Linux guest with scalalbe mode enabled and > disabled. A virtio prototype[1][2] that can issue PAISD based DMA > request were also tested, different PASID were used in TX and RX in > those testing drivers. > > Changes since V3: > > - rearrange the member for vtd_iotlb_key structure > - reorder the pasid parameter ahead of addr for vtd_lookup_iotlb() > - allow access size from 1 to 8 for vtd_mem_ir_fault_ops
Reviewed-by: Peter Xu <pet...@redhat.com> -- Peter Xu
