Standalone verification of IOMMU with virtualization supporting

Abstract

This article presents an approach to standalone verification of I/O Memory Management Unit with virtualization supporting. We presented the base architecture of the test system. The main problems encountered during the verification of IOMMU with virtualization support are considered. One of the key problems was the formation of translation table pages. The number of translation tables depends on the mode of IOMMU operation and the type of translation. As a solution of this problem the approach to the dynamic generation of translation tables is proposed. The algorithm for formation of translation table pages in the generator is presented. The problem of validating the translation of a virtual address into a physical one using two-level translation tables is solved. The features of the reference model implementation are considered. Reference model and test system which have been used for IOMMU verification of microprocessor with the 6th generation «Elbrus» architecture are described. The main components of the test system and the methods of communication between test system and IOMMU model are presented. The results of IOMMU verification are considered.