Re: [Xen-devel] Is anyone working on HVM Paravirt drivers for windows?

[Hiromichi Itou <ito@xxxxxxxx>]

Hi,

We can use HVM Paravirt driver for windows now.
It is included in XenEnterprise3.1.0b1.

Is there a plan to make this driver to open source?

---
Begi.net (http://Begi.net)
Director of Engineering Department  　
Hiromichi Ito (ito@xxxxxxxx)

On 2006/11/02, at 17:50, Pasi Kärkkäinen wrote:

> On Wed, Nov 01, 2006 at 12:08:02PM -0500, Vessey, Bruce A wrote:
> > It would be nice if somebody releases HVM paravirt drivers for  
> > Windows as open source, but I'm not holding my breath.
> > Why? Because of the Microsoft DDK license.  There's no requirement  
> > that a Windows device driver developer use the
> > Microsoft DDK, but in my experience most do.  The typical  
> > methodology for a Windows driver developer is to take
> > the sample code from the DDK as a starting point, and build the  
> > driver from there.  But the DDK has some interesting
> > licensing restrictions that, to me, don't look compatible with  
> > open source.  The Microsoft DDK license is available at
> > http://www.microsoft.com/whdc/devtools/ddk/ServerSP1DDKEULA.mspx   
> > Sections 3 & 4 look particularly problematic.
> > Maybe somebody out there is developing (or has developed) Windows  
> > drivers without any encumbrances from the Windows DDK.
> > I think that's the only way we'll see open source Windows drivers.
> Thanks for pointing this out.
>
> How about XenSource/RedHat/Novell guys.. any comments?
>
> -- Pasi
>
> >            - Bruce
> >
> > -----Original Message-----
> > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel- 
> > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Ben Thomas
> > Sent: Monday, October 30, 2006 2:07 PM
> > To: Daniel P. Berrange
> > Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Dave Cameron
> > Subject: Re: [Xen-devel] Is anyone working on HVM Paravirt drivers  
> > for windows?
> > Hi,
> >
> > Our current PV on HVM drivers are based upon work that was  
> > submitted to xen-devel back in April.  As you might recall, our  
> > focus has been concurrent support of 32 and 64 bit fully  
> > virtualized domains, and all of our work supports this.  I'm sure  
> > that the concepts of what we've done, and what was placed into the  
> > open source project starting in July, are quite similar. However,  
> > given the time frames involved, and the base work not being  
> > included back in April, I also have no doubts that the interfaces  
> > aren't identical.
> > As noted, we have these drivers running and performing extremely  
> > well at our beta customers.  We support concurrent usage for both  
> > 32 and
> > 64 bit user domains.  The Linux code was released a short while  
> > back, and is open source and available for download on our website.
> > The Windows drivers were completely developed in-house, and there  
> > are currently internal discussions about whether or not we will  
> > release them as open source.
> > -b
> >
> >
> > Daniel P. Berrange wrote:
> > > Are they compatible with the current xen-unstable or 3.0.3 releases,
> > > or do they have a dependnacy on the other hypervisor changes in the
> > > VirtualIron codepath posted a few weeks back ?
> > >
> > > Regards,
> > > Dan.
> > >
> > > On Fri, Oct 27, 2006 at 07:37:36AM -0400, Ben Thomas wrote:
> > >
> > > > Yes; we have.
> > > >
> > > > On 10/27/06, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
> > > >
> > > > > OK.
> > > > >
> > > > > How about people from XenSource, VirtualIron, Intel, IBM,  
> > > > > Fujitsu..
> > > > > are you writing windows PV drivers?
> > > > >
> > > > > -- Pasi
> > --
> > --------------------------------------------------------------------- 
> > ---
> > Ben Thomas                                         Virtual Iron  
> > Software
> > bthomas@xxxxxxxxxxxxxxx                            Tower 1, Floor 2
> > 978-849-1214                                       900 Chelmsford  
> > Street
> >                                                     Lowell, MA 01851
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