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

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Message-ID: <20131231185656.GB3129@phenom.dumpdata.com>
Date:	Tue, 31 Dec 2013 13:56:56 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
	boris.ostrovsky@...cle.com, david.vrabel@...rix.com,
	mukesh.rathor@...cle.com, jbeulich@...e.com
Subject: Re: [Xen-devel] [PATCH v11 09/12] xen/pvh: Piggyback on PVHVM XenBus
 and event channels for PVH.

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