From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 549991A007E for ; Tue, 20 May 2014 08:37:42 +1000 (EST) Message-ID: <1400539049.3986.71.camel@pasglop> Subject: Re: [PATCH 2/8] powerpc/eeh: Info to trace passed devices From: Benjamin Herrenschmidt To: Alexander Graf Date: Tue, 20 May 2014 08:37:29 +1000 In-Reply-To: <5379FD19.2020100@suse.de> References: <1400040722-29608-1-git-send-email-gwshan@linux.vnet.ibm.com> <1400040722-29608-3-git-send-email-gwshan@linux.vnet.ibm.com> <5379FD19.2020100@suse.de> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Cc: aik@ozlabs.ru, Gavin Shan , kvm-ppc@vger.kernel.org, alex.williamson@redhat.com, qiudayu@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Mon, 2014-05-19 at 14:46 +0200, Alexander Graf wrote: > I don't see the point of VFIO knowing about guest addresses. They are > not unique across a system and the whole idea that a VFIO device has to > be owned by a guest is also pretty dubious. > > I suppose what you really care about here is just a token for a specific > device? But why do you need one where we don't have tokens yet? I think this is going to be needed when doing in-kernel acceleration of some of the RTAS calls, but yes, Gavin, why do we need that now ? Cheers, Ben.