From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: PCI Passthrough ARM Design : Draft1 Date: Fri, 26 Jun 2015 09:52:48 -0400 Message-ID: <20150626135248.GD2341@l.oracle.com> References: <1435234888.32500.80.camel@citrix.com> <20150625172647.GB2470@x230.dumpdata.com> <558CB3DE.7000004@caviumnetworks.com> <1435303946.17598.41.camel@citrix.com> <558D123D.50205@caviumnetworks.com> <1435309787.32500.151.camel@citrix.com> <558D3E1C.8000304@caviumnetworks.com> <1435322468.32500.184.camel@citrix.com> <20150626132842.GA2106@l.oracle.com> <1435326458.32500.185.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1435326458.32500.185.camel@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Ian Campbell Cc: Vijay Kilari , Stefano Stabellini , Prasun Kapoor , "Kumar, Vijaya" , Manish Jaggi , "xen-devel@lists.xen.org" , Julien Grall , Stefano Stabellini , "Kulkarni, Ganapatrao" , Roger Pau =?iso-8859-1?Q?Monn=E9?= List-Id: xen-devel@lists.xenproject.org On Fri, Jun 26, 2015 at 02:47:38PM +0100, Ian Campbell wrote: > On Fri, 2015-06-26 at 09:28 -0400, Konrad Rzeszutek Wilk wrote: > > I would advocate a more dynamic idea of GUEST_MMIO_* so that the toolstack > > can allocate those with headroom. Perhaps stash it at the far far end > > of the guest accessible memory? But that would require an 64-bit capable > > OS which might not work for all use-cases (where you want a 32-bit OS). > > I'd be incline to define two areas, one under 4GB but limited in size > and the other above and to decide which to used based on $factors-tbd +1