QEMU Binary Translation

Ashish Kaila (akaila)

Maneet Singh (maneets)

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Virtualization Techniques

Ø Full Virtualization using Binary Translation

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Virtualization Techniques

Ø OS Assisted Virtualization or Paravirtualization

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Virtualization Techniques

Ø Hardware Assisted Virtualization

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Binary Translation

Ø VMWare Software Virtualization

Source Inst Stream (binary)

IR1IR2

.

.IRn

Translation Units (TU)

IR1IR2

.

.IRn

Target Inst Stream (binary)

Compiled Code Fragment (CCF)

Dynamic Binary Translator

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Binary Translation

Ø QEMU Binary Translation in brief

Source Inst Stream (binary)

Micro-operations

implemented in C

Object file

Target Inst Stream (binary)

dyngen

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Quick EMUlation (QEMU)

Ø Machine Emulator

Ø Virtualizer

QEMU modes:

Ø User-mode emulation – Allows a process built for one CPU to be

executed on another.

Ø System-mode emulation – Allows emulation of a full system,

including processor and assorted peripherals.7

References

• A comparison of software and hardware techniques for x86 virtualization – Keith Adams, Ole Agesen, ASPLOS’06

• Understanding Full Virtualization, Paravirtualization and Hardware Assist – VMware Whitepaper

• QEMU, a fast and portable Dynamic Translator – Fabrice Bellard

• QEMU Wiki: wiki.qemu.org

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QEMU Deep Dive

Source: wiki.qemu.org

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QEMU ARCHITECTURE

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Thank you

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