Re: [Xen-devel] Paravitrualization drivers query

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Fri, Jul 21, 2017 at 12:42:04PM +0530, shishir tiwari wrote:
> > Hi
> >
> > I am trying understand Xen Pv drivers and i writing my own pv fronend and
> > backend driver.
> >
> > 1. For driver internal communication how do i create/write node in backend
> > driver and how to read in fronted drivers.
> > 2.how do i create one shared page in backend driver to write/read data in
> > frontend driver.
> >
> 
> >Depending on where your driver lives >(kernel or userspace), the APIs are
> >going to be different.
> 
> 
> My driver will be in kernel space. I want to create some Node and shared
> page or queue. So I can transfer data for domu to dom0.
> 
> 
> > I gone-through kernel code and but its tittle bit confusing to me.
> 
> >>Which bits do you find confusing?
> 
> 
> I am not able to understand who first create Node and shared memory by xen
> or domO or may be by frontend drivers

The nodes are first created by the toolstack, then filled in by backend
and frontend.

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