Re: pv_ops reassigndev for pci passthrough

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Wed, Dec 23, 2009 at 09:37:48PM +0000, Keir Fraser wrote:
> On 23/12/2009 20:10, "Michael D Labriola" <mlabriol@gdeb.com> wrote:
> 
> >> New option is reassign_resources. Used like:
> >> guestdev=00:01.0,00:02.0 reassign_resources
> >> Where you use guestdev= instead of pciback.hide=
> > 
> > Can this be done somehow post boot?

As a hack you can eliminate the check in the Xend python code for this
and see how far you can go. Just remember that it is a hack :-)

> > 
> > Is it in Jeremy's xen/master?  It doesn't seem to be working in my pull
> > from 2 hours ago...
> 
> This is in the 2.6.18 tree. It may be that nothing like this is in the
> pv_ops tree.

I had not ported it over. My thought was to write code in the pciback code
that would do this automatically (if BARs are found to be not BAR aligned).

Thought I am unsure of why this was not explored - are there any bad technical
reasons to make BARs page-aligned after the device has been enabled (and then
disabled)?

I am taking aside the Linux kernel resources structs (request_resource
and its friends), which probabally will throw a fit.