RE: [Xen-devel] Xen support for PCI-SIG I/O Virtualization

["Woller, Thomas" <thomas.woller@xxxxxxx>]

> Let me know if you want to know more.
Curious if your patches have any multi-root logic.. Or if only SR.

Do you have specific smart NICs that you recommend that work with your
patches/Xen?

thanks,
Tom

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Greg Law
> Sent: Wednesday, January 16, 2008 11:56 AM
> To: Masroor Vettuparambil
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Xen support for PCI-SIG I/O Virtualization
> 
> Masroor Vettuparambil wrote:
> > Hi,
> >  
> > what is the current support of Xen for PCI-SIG IOV SR/MR spec?
> > I have a PCIe device which supports multiple virtual functions(VF), 
> > and want to enable direct assignment of each of these VFs 
> to different domUs.
> > So is it possible to assign a PCIe virtual channel/function to domU 
> > directly?
> 
> Have you seen the work we did recently to allow smart NIC's 
> to be accessed directly from the guest?  Essentially your 
> "accelerated" driver is a plugin to netfront (which knows how 
> to send/receive packets with safe direct access hardware to 
> the NIC), and a plugin for netback which deals with the 
> privileged part of programming the NIC (e.g. creating virtual 
> devices and handing them out to the guests as appropriate). 
> Among other things, this architecture means you can support 
> migrating to machines with no smart hardware, or a different 
> smart NIC.
> 
> Let me know if you want to know more.
> 
> As far as programming the IOMMU goes, I've seen various 
> patches flying around so I know work has been done here, but 
> I don't know any more than that.
> 
> Cheers,
> 
> Greg
> -- 
> Greg Law                                              +44 1223 518 040
> 
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> 
> 



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