From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julien Grall <julien.grall@linaro.org>
Subject: Re: [PATCH 5/6] xen: arm: add some helpers for
	assessing p2m pte
Date: Tue, 10 Jun 2014 12:37:52 +0100
Message-ID: <5396EE10.8060804@linaro.org>
References: <1402394127.29980.52.camel@kazak.uk.xensource.com>
	<1402394278-9850-5-git-send-email-ian.campbell@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <1402394278-9850-5-git-send-email-ian.campbell@citrix.com>
List-Unsubscribe: <http://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <http://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Sender: xen-devel-bounces@lists.xen.org
Errors-To: xen-devel-bounces@lists.xen.org
To: Ian Campbell <ian.campbell@citrix.com>, xen-devel@lists.xen.org
Cc: tim@xen.org, stefano.stabellini@eu.citrix.com
List-Id: xen-devel@lists.xenproject.org

On 06/10/2014 10:57 AM, Ian Campbell wrote:
>      mask = SECOND_MASK;
>      second = map_domain_page(pte.p2m.base);
>      pte = second[second_table_offset(paddr)];
> -    if ( !pte.p2m.valid || !pte.p2m.table )
> +    if ( !p2m_table(pte) )
>          goto done;
>  
>      mask = THIRD_MASK;
> @@ -156,11 +161,11 @@ paddr_t p2m_lookup(struct domain *d, paddr_t paddr, p2m_type_t *t)
>      pte = third[third_table_offset(paddr)];
>  
>      /* This bit must be one in the level 3 entry */
> -    if ( !pte.p2m.table )
> +    if ( !p2m_table(pte) )
>          pte.bits = 0;
>  
>  done:
> -    if ( pte.p2m.valid )
> +    if ( p2m_valid(pte) )

Regardless the current check, I think this should be p2m_entry(pte) to
help code comprehension.

Indeed, the can only get the address if the pte is pointed to a memory
block.

Regards,

-- 
Julien Grall