From mboxrd@z Thu Jan  1 00:00:00 1970
From: Julien Grall <julien.grall@citrix.com>
Subject: Re: [PATCH 04/19] xen: arm: provide and use a
	handle_raz_wi helper
Date: Thu, 2 Apr 2015 16:14:08 +0100
Message-ID: <551D5CC0.9030709@citrix.com>
References: <1427796446.2115.34.camel@citrix.com>
	<1427796462-24376-4-git-send-email-ian.campbell@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <1427796462-24376-4-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: julien.grall@linaro.org, tim@xen.org, stefano.stabellini@eu.citrix.com
List-Id: xen-devel@lists.xenproject.org

Hi Ian,

On 31/03/2015 11:07, Ian Campbell wrote:
> Reduces the use of goto in the trap handlers to none.
>
> Some explcitily 32-bit types become register_t here, but that's OK, on

s/explcitily/explicitly/

> 32-bit they are 32-bit already and on 64-bit it is fine/harmless to
> set the larger register, a 32-bit guest won't see the top half in any
> case.

What about 32-bit userspace on 64-bit kernel? Are we sure that a guest 
kernel won't only save the bottom half of the register?

Regards,

-- 
Julien Grall