Formal virtualization requirements for the ARM architecture

  • Authors:
  • Niels Penneman;Danielius Kudinskas;Alasdair Rawsthorne;Bjorn De Sutter;Koen De Bosschere

  • Affiliations:
  • Computer Systems Lab, Ghent University, Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium and Vrije Universiteit Brussel (VUB), Dept. of Electronics and Informatics (ETRO), Pleinlaan 2, B-1050 Brus ...;School of Computer Science, The University of Manchester, Oxford Road, Manchester M13 9PL, UK;School of Computer Science, The University of Manchester, Oxford Road, Manchester M13 9PL, UK;Computer Systems Lab, Ghent University, Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium;Computer Systems Lab, Ghent University, Sint-Pietersnieuwstraat 41, B-9000 Gent, Belgium

  • Venue:
  • Journal of Systems Architecture: the EUROMICRO Journal
  • Year:
  • 2013

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Abstract

We present an analysis of the virtualizability of the ARMv7-A architecture carried out in the context of the seminal paper published by Popek and Goldberg 38years ago. Because their definitions are dated, we first extend their machine model to modern architectures with paged virtual memory, IO and interrupts. We then use our new model to show that ARMv7-A is not classically virtualizable. Insights such as binary translation enable efficient virtualization beyond the original criteria. Companies are also making their architectures virtualizable through extensions. We analyse both approaches for ARM and conclude that both have their use in future systems.