Re: [Xen-devel] [PATCH] xen pvhvm: do not remap pirqs onto evtchns if !xen_have_vector_callback

[Stefano Stabellini <stefano.stabellini@eu.citrix.com>]

On Wed, 1 Feb 2012, Konrad Rzeszutek Wilk wrote:
> On Tue, Jan 31, 2012 at 04:40:26PM +0000, Stefano Stabellini wrote:
> > On Tue, 31 Jan 2012, Konrad Rzeszutek Wilk wrote:
> > > On Mon, Jan 30, 2012 at 02:31:46PM +0000, Stefano Stabellini wrote:
> > > > 
> > > > Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> > > 
> > > So the xen_have_vector_callback looks to be only set by
> > > 
> > > 1398         if (xen_feature(XENFEAT_hvm_callback_vector))
> > > 1399                 xen_have_vector_callback = 1;
> > > 
> > > So could this be just done via a check for that instead?
> > > 
> > 
> > Sure, but I don't think it would be better: using
> > xen_have_vector_callback is more consistent and give us the flexibility
> > of allowing users to manually override it in the future.
> 
> ok. applied. Hm, I was thinking to put on stable@kernel.org - but how
> far back should it go? 2.6.37?

Yes, I think is 2.6.37 when we introduced using XENFEAT_hvm_pirqs.