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Re: [Xen-devel] Re: [PATCH][v5] PV extension of HVM(hybrid) in support i

To: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH][v5] PV extension of HVM(hybrid) in support in Xen
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Fri, 5 Mar 2010 11:19:24 +0000
Cc: Tim Deegan <Tim.Deegan@xxxxxxxxxxxxx>, Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxxx>, Sheng Yang <sheng@xxxxxxxxxxxxxxx>
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On Fri, 5 Mar 2010, Ian Campbell wrote:
> On Fri, 2010-03-05 at 02:01 +0000, Sheng Yang wrote:
> > On Thursday 04 March 2010 23:04:31 Tim Deegan wrote:
> > > Hi,
> > > 
> > > Given that we now have a similar feature from Stefano I'd like to see
> > > them resolved into a single patchset.
> > 
> > I think Stefano's patch focused on pv_ops dom0? We are focused on upstream 
> > Linux as domU...
> Stefano's patches are based on the latest Xen branches which support
> dom0 but his work is focused on domU. That is because there is a lot of
> similarity between the needs of dom0 and the needs of PVonHVM event
> channels so it makes sense to leverage one for the other.
> > I think we can get dom0 approach step by step. 
> I think we'd be better served in extracting the bits of the domain0
> patchset which support/enable Stefano's patches and pushing that stuff
> upstream as a complete series. Otherwise we basically need to
> reimplement domain 0 stuff on top of / alongside your patcheset.


If you look at the fourth patch of my series you'll find that the only
thing needed is the xen_setup_pirqs mechanism, that has been recently
refactored to address the comments from the kernel community, so it
shouldn't be difficult to upstream.

Besides upstreaming something now that you know has to be changed soon
is certainly not going to help Xen or its users.

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