From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:45133) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TCWcB-0004wc-Av for qemu-devel@nongnu.org; Fri, 14 Sep 2012 10:11:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TCWc7-0005yf-12 for qemu-devel@nongnu.org; Fri, 14 Sep 2012 10:11:27 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33933) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TCWc6-0005yZ-Of for qemu-devel@nongnu.org; Fri, 14 Sep 2012 10:11:22 -0400 Date: Fri, 14 Sep 2012 10:11:20 -0400 From: Jason Baron Message-ID: <20120914141119.GC1821@redhat.com> References: <5052DE9F.9030609@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5052DE9F.9030609@redhat.com> 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, alex.williamson@redhat.com, mst@redhat.com, jan.kiszka@siemens.com, 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, Sep 14, 2012 at 09:37:03AM +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. > > cheers, > Gerd > > Ok, I had played with increasing the pci hole (and corresponding dsdt table changes), I can try going to a bigger size as you suggest. Thanks, -Jason