Linux virtualization and PCI passthrough
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Platform virtualization is about sharing a platform among two or more operating systems for more efficient use of resources. But platform implies more than just a processor: it also includes the other important elements that make up a platform, including storage, networking, and other hardware resources. Some hardware resources can easily be virtualized, such as the processor or storage, but other hardware resources cannot, such as a video adapter or a serial port. Peripheral Component Interconnect (PCI) passthrough provides the means to use those resources efficiently, when sharing is not possible or useful. This article explores the concept of passthrough, discusses its implementation in hypervisors, and details the hypervisors that support this recent innovation.
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Processors have evolved to improve performance for virtualized environments, but what about I/O aspects? Discover one such I/O performance enhancement called device (or PCI) passthrough. This innovation improves performance of PCI devices using hardware support from Intel (VT-d) or AMD (IOMMU). Full Story |
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