VGA passthrough in Xen Author: Y. Schaeffer Supervisor: M. Mobach - - PowerPoint PPT Presentation

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Sep 11, 2023 255 likes •355 views

VGA passthrough in Xen Author: Y. Schaeffer Supervisor: M. Mobach Concept Only host OS has direct hardware access Guest OS has virtualized hardware Xen has no notion of devices Hardware accelerated guest PCI passthrough

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VGA passthrough in Xen

Author: Y. Schaeffer Supervisor: M. Mobach

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Concept

 Only host OS has direct hardware access  Guest OS has virtualized hardware  Xen has no notion of devices  Hardware accelerated guest

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PCI passthrough

 Normal situation  Virtualized situation  Hardware support  Does not work for VGA :-)

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Xen patch

 Existing patch J. Guyader, may 2008  Not in open source tree  Analyse  Not (very well) documented

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VGA passthrough

 VGA has long history  VGA is expected to work  Adapter has own BIOS

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Problems

 Ridged design  Xen assumes no VGA available  Re execute BIOS

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Conclusion

 Promising  Only Intel  Multiple adapters  Vmware's alternative  Lack of documentation

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