Re: [Xen-devel] [PATCH v11 09/12] xen/pvh: Piggyback on PVHVM XenBus and event channels for PVH.

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 31 Dec 2013, Konrad Rzeszutek Wilk wrote:
> > > --- a/drivers/xen/xenbus/xenbus_client.c
> > > +++ b/drivers/xen/xenbus/xenbus_client.c
> > > @@ -45,6 +45,7 @@
> > >  #include <xen/grant_table.h>
> > >  #include <xen/xenbus.h>
> > >  #include <xen/xen.h>
> > > +#include <xen/features.h>
> > >  
> > >  #include "xenbus_probe.h"
> > >  
> > > @@ -743,7 +744,7 @@ static const struct xenbus_ring_ops ring_ops_hvm = {
> > >  
> > >  void __init xenbus_ring_ops_init(void)
> > >  {
> > > - if (xen_pv_domain())
> > > + if (xen_pv_domain() && !xen_feature(XENFEAT_auto_translated_physmap))
> > 
> > Can we just change this test to
> > 
> > if (!xen_feature(XENFEAT_auto_translated_physmap))
> > 
> > ?
> 
> No. If we do then the HVM domains (which are also !auto-xlat)
> will end up using the PV version of ring_ops.

Actually HVM guests have XENFEAT_auto_translated_physmap, so in this
case they would get &ring_ops_hvm.


> > >           ring_ops = &ring_ops_pv;
> > >   else
> > >           ring_ops = &ring_ops_hvm;
> > > -- 
> > > 1.8.3.1
> > > 
> > > 
> > > _______________________________________________
> > > Xen-devel mailing list
> > > Xen-devel@xxxxxxxxxxxxx
> > > http://lists.xen.org/xen-devel
> > > 
> 

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