From mboxrd@z Thu Jan  1 00:00:00 1970
From: Artem Mygaiev <joculator@gmail.com>
Subject: Re: [RFC] Shared coprocessor framework
Date: Tue, 1 Nov 2016 15:57:13 +0200
Message-ID: <CAJwc6Kt5Y6QRJ2=moOgq0sL1dBmW-SBfcQ+AvsJWKwaUw2YmfA@mail.gmail.com>
References: <CAC1WxdichD=u_MUrfj61Nv2voTv87HOh0E3wRVFO+nkHrVYmpA@mail.gmail.com>
 <8ffc5fdf-70b0-a1b6-1405-e9021a61df47@citrix.com>
 <CAC1Wxdgv-pF5aFa90ra+-GSr0SePsRG+LuAkUmrbFx69PHARUw@mail.gmail.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: <CAC1Wxdgv-pF5aFa90ra+-GSr0SePsRG+LuAkUmrbFx69PHARUw@mail.gmail.com>
List-Unsubscribe: <https://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: <https://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: Andrii Anisov <andrii.anisov@gmail.com>
Cc: Oleks Tysh <olekstysh@gmail.com>, Andrew Cooper <andrew.cooper3@citrix.com>, xen-devel@lists.xensource.com, embedded-pv-devel@lists.xenproject.org
List-Id: xen-devel@lists.xenproject.org
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