On Wed, Feb 17, 2010 at 08:19:14AM -0800, ravi kerur wrote:
> Hi Konrad,
>
> Using PCI passthrough(I believe it is via config file changes) prevents
> other domU's accessing the NIC correct? If I use it, would the network
> transmit/receive still happen via netfront/netback drivers?
>
No. If you use PCI passthrough then the domU uses the real driver for the nic
that would also be used on baremetal or in dom0.
PCI passthrough for a NIC is only possible to one/single domU, per PCI device.
(Some multiport NICs show up as a multiple PCI devices, which allows you to
passthrough different ports to different domUs).
-- Pasi
> Thanks
> -RK
>
> On Tue, Feb 16, 2010 at 10:14 AM, Konrad Rzeszutek Wilk
> <[1]konrad.wilk@xxxxxxxxxx> wrote:
>
> On Mon, Feb 15, 2010 at 07:54:02AM -0800, ravi kerur wrote:
> > Paul,
> >
> > Registers are not in netback, they are h/w registers on NIC and the
> driver
> > supports reads/writes via ioctl calls. Driver is in dom0 and
> application
> > which reads/writes registers is run in domU.
>
> You could use PCI passthrough. This way the NIC would be visible in your
> DomU and you could fiddle with the registers.
>
> References
>
> Visible links
> 1. mailto:konrad.wilk@xxxxxxxxxx
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