Dynamic security domain scaling on embedded symmetric multiprocessors

  • Authors:

  • Hiroaki Inoue;Tsuyoshi Abe;Kazuhisa Ishizaka;Junji Sakai;Masato Edahiro

  • Affiliations:

  • System IP Core Research Laboratories, NEC Corporation, Kanagawa, Japan;System IP Core Research Laboratories, NEC Corporation, Kanagawa, Japan;System IP Core Research Laboratories, NEC Corporation, Kanagawa, Japan;System IP Core Research Laboratories, NEC Corporation, Kanagawa, Japan;System IP Core Research Laboratories, NEC Corporation, Kanagawa, Japan

  • Venue:
  • ACM Transactions on Design Automation of Electronic Systems (TODAES)
  • Year:
  • 2009

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Abstract

We propose a method for dynamic security-domain scaling on SMPs that offers both highly scalable performance and high security for future high-end embedded systems. Its most important feature is its highly efficient use of processor resources, accomplished by dynamically changing the number of processors within a security-domain (i.e., dynamically yielding processors to other security-domains) in response to application load requirements. Two new technologies make this scaling possible without any virtualization software: (1) self-transition management and (2) unified virtual address mapping. Evaluations show that this domain control provides highly scalable performance and incurs almost no performance overhead in security-domains. The increase in OSs in binary code size is less than 1.5%, and the time required for individual state transitions is on the order of a single millisecond. This scaling is the first in the world to make possible the dynamic changing of the number of processors within a security-domain on an ARM SMP.