Bicycle User Manual

Extending Intel Virtualization

Technology

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support for I/O device virtualization

–

direct I/O virtualization to the chipset(“VT-d”).

Currently, I/O devices aren’t aware of virtualization

and must go through the VMM before being

assigned to a virtual machine.

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software emulation slow

–

Performance

I/O requests must traverse two I/O stacks (guest and host)

–

Functionality

Guest OSes “see” only restricted sets of legacy devices

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Reliability

Drivers are potentially undependable if they run as part of privileged

software