Greetings,

Patches to support Single Root I/O Virtualization (SR-IOV) capability are 
available for the Linux 2.6 development tree.

KVM and Xen supports will come soon!

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Single Root I/O Virtualization (SR-IOV) capability defined by PCI-SIG is 
intended to enable multiple system software to share PCI hardware resources. 
PCI device that supports this capability can be extended to one Physical 
Functions plus multiple Virtual Functions. Physical Function, which could be 
considered as the "real" PCI device, reflects the hardware instance and manages 
all physical resources. Virtual Functions are associated with a Physical 
Function and shares physical resources with the Physical Function. Software can 
control allocation of Virtual Functions via registers encapsulated in the 
capability.

Following patches add SR-IOV capability support to the Linux kernel. With these 
patches, people can turn a PCI device with the capability into multiple ones 
from software perspective.

[PATCH 1/4] PCI: export pci_read_base and add pci_update_base
[PATCH 2/4] PCI: support ARI capability
[PATCH 3/4] PCI: support SR-IOV capability
[PATCH 4/4] PCI: document SR-IOV

SR-IOV specification can be found at 
http://www.pcisig.com/members/downloads/specifications/iov/sr-iov1.0_11Sep07.pdf
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