KVM devices assignment; PCIe AER?

etmartin101
2010-10-26T16:42:48Z

Chris, Michael et al.

Part of the project I'm working on, we are looking at extending the
device assignment capabilities to provide support for PCIe AER.
Ideally, the host would register for AER (for every assigned devices) and
pass them up to Qemu.

As of now, one of the problem is that KVM is not a driver for the
assigned devices. I've seen Chris's slides from KVM conf 2010 but I
haven't seen any patches or discussion on that topic...

On another front, I've seen the work from Michael around 'uio_pci_generic'
and some of his comments:
" It's expected that more features of interest to virtualization will be
added to this driver in the future. Possibilities are: mmap for device
resources, MSI/MSI-X, eventfd (to interface with kvm), iommu."

I think that extending 'uio_pci_generic' to support AER is relatively
straight forward (assuming eventfd support from UIO).

Any thought?

thanks,
-Etienne