From mboxrd@z Thu Jan 1 00:00:00 1970 From: Olaf Hering Subject: Re: fixed location of share info page in HVM guests Date: Tue, 28 Aug 2012 10:23:02 +0200 Message-ID: <20120828082302.GA27309@aepfle.de> References: <20120827215636.GA22031@aepfle.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Keir Fraser Cc: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On Tue, Aug 28, Keir Fraser wrote: > How about we guarantee that guests can use the 1MB in address range > 0xFED00000-0xFEDFFFFF for whatever mappings they like, guaranteed unused (or > at least, mapped with nothing useful) when guest kernel starts? > > This is already, and has always been, the case. But we can etch it in stone > quite easily. :) 0xFED00000UL is appearently the hpet base adress. But if there is room after that, then lets use that. However, I'm not familiar with these things. Should the area appear in the E820 map as reserverd? If so, where is the code which configures the guests E820 map? Olaf