From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:38458) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TE5Le-0002Pk-Mb for qemu-devel@nongnu.org; Tue, 18 Sep 2012 17:28:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TE5Ld-00020F-O0 for qemu-devel@nongnu.org; Tue, 18 Sep 2012 17:28:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:4582) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TE5Ld-000205-Fl for qemu-devel@nongnu.org; Tue, 18 Sep 2012 17:28:49 -0400 Message-ID: <1348003724.28860.17.camel@bling.home> From: Alex Williamson Date: Tue, 18 Sep 2012 15:28:44 -0600 In-Reply-To: <5052DE9F.9030609@redhat.com> References: <5052DE9F.9030609@redhat.com> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 11/25] q35: Introduce q35 pc based chipset emulator List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: aliguori@us.ibm.com, mst@redhat.com, jan.kiszka@siemens.com, Jason Baron , qemu-devel@nongnu.org, agraf@suse.de, yamahata@valinux.co.jp, juzhang@redhat.com, kevin@koconnor.net, avi@redhat.com, mkletzan@redhat.com, lcapitulino@redhat.com, afaerber@suse.de, armbru@redhat.com On Fri, 2012-09-14 at 09:37 +0200, Gerd Hoffmann wrote: > On 09/13/12 22:12, Jason Baron wrote: > > + if (ram_size >= 0xe0000000) { > > + above_4g_mem_size = ram_size - 0xe0000000; > > + below_4g_mem_size = 0xe0000000; > > We should make the hole larger to get more pci i/o address space below > 4G, especially as q35 needs a good chunk of it for mmconfig. > > I think at least 0xc0000000, maybe even 0xb0000000. The later would > allow to place mmconfig @ 0xb0000000, one big 512MB pci bar @ 0xc0000000 > (think gfx card pass-through) and all the remaining little stuff above > 0xe0000000. We also seem to be missing logic in seabios to avoid assigning pci bars to the mmconfig area. I just tried to assign a graphics card and put it right over it. Thanks, Alex