From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@suse.com>
Subject: Re: [PATCH 1/4] x86emul: avoid speculative out of
 bounds accesses
Date: Thu, 31 Jan 2019 08:50:34 -0700
Message-ID: <5C53194A0200007800212D9A@prv1-mh.provo.novell.com>
References: <5C5301290200007800212C6B@prv1-mh.provo.novell.com>
 <5C53056B0200007800212C9B@prv1-mh.provo.novell.com>
 <bed75e46-1a6d-45b2-e945-a3bb49f8e8fe@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xenproject.org>
Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6])
 by lists.xenproject.org with esmtp (Exim 4.89)
 (envelope-from <SRS0=qOm0=QH=suse.com=jbeulich@srs-us1.protection.inumbo.net>)
 id 1gpEbt-0002jY-OR
 for xen-devel@lists.xenproject.org; Thu, 31 Jan 2019 15:50:37 +0000
In-Reply-To: <bed75e46-1a6d-45b2-e945-a3bb49f8e8fe@citrix.com>
Content-Disposition: inline
List-Unsubscribe: <https://lists.xenproject.org/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xenproject.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xenproject.org>
List-Help: <mailto:xen-devel-request@lists.xenproject.org?subject=help>
List-Subscribe: <https://lists.xenproject.org/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xenproject.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xenproject.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xenproject.org>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Juergen Gross <jgross@suse.com>, xen-devel <xen-devel@lists.xenproject.org>, Wei Liu <wei.liu2@citrix.com>, nmanthey@amazon.de, Roger Pau Monne <roger.pau@citrix.com>
List-Id: xen-devel@lists.xenproject.org
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