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Authors: Jun Nakajima
2022-09-16

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The presentation discusses the inclusion of IO devices into Trusted Execution Environments (TEE) and the software changes required to support it.
  • Current IO virtualization technologies for TEEs have limitations and incur significant performance overhead
  • Direct access to hardware IO devices in VMs requires hardware support such as MMIO and DMA remapping capability
  • Devices and VMs need to be trusted for protection and isolation
  • Intel TDX architecture supports direct assignment and establishment of trust between TDI and TDS
  • Software changes are required for Intel TDX in support of TEIO
  • High-level software flows and new functionality enable Intel TDX support in TEEs