From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH V4] vm_event: Allow subscribing to write
 events for specific MSR-s
Date: Fri, 22 Apr 2016 19:07:15 +0100
Message-ID: <571A6853.7060306@citrix.com>
References: <1460920542-23873-1-git-send-email-rcojocaru@bitdefender.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <1460920542-23873-1-git-send-email-rcojocaru@bitdefender.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>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: Razvan Cojocaru <rcojocaru@bitdefender.com>, xen-devel@lists.xen.org
Cc: kevin.tian@intel.com, tamas@tklengyel.com, wei.liu2@citrix.com, jbeulich@suse.com, ian.jackson@eu.citrix.com, jun.nakajima@intel.com, keir@xen.org
List-Id: xen-devel@lists.xenproject.org
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