linux-kernel - Re: [PATCH v12 16/18] xen/pvh: Piggyback on PVHVM XenBus.

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Message-ID: <alpine.DEB.2.02.1401031721380.8667@kaball.uk.xensource.com>
Date:	Fri, 3 Jan 2014 17:22:04 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	<linux-kernel@...r.kernel.org>, <xen-devel@...ts.xenproject.org>,
	<boris.ostrovsky@...cle.com>, <david.vrabel@...rix.com>,
	<stefano.stabellini@...citrix.com>, <mukesh.rathor@...cle.com>
Subject: Re: [PATCH v12 16/18] xen/pvh: Piggyback on PVHVM XenBus.

On Tue, 31 Dec 2013, Konrad Rzeszutek Wilk wrote:
> From: Mukesh Rathor <mukesh.rathor@...cle.com>
> 
> PVH is a PV guest with a twist - there are certain things
> that work in it like HVM and some like PV. For the XenBus
> mechanism we want to use the PVHVM mechanism.
> 
> Signed-off-by: Mukesh Rathor <mukesh.rathor@...cle.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> ---
>  drivers/xen/xenbus/xenbus_client.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
> index ec097d6..7f7c454 100644
> --- 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))

As I wrote in the other email, this should be

if (!xen_feature(XENFEAT_auto_translated_physmap))


>  		ring_ops = &ring_ops_pv;
>  	else
>  		ring_ops = &ring_ops_hvm;
> -- 
> 1.8.3.1
> 
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