From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: Re: [RFC PATCH v3 3/3] fw/pci: Allocate IGD stolen memory Date: Mon, 15 Feb 2016 10:46:35 -0700 Message-ID: <20160215104635.00814fb3@t450s.home> References: <20160213001835.18456.46422.stgit@gimli.home> <20160213002318.18456.48603.stgit@gimli.home> <20160213024904.GA31040@morn.lan> <20160213081209.6e4342ab@t450s.home> <20160213181838.GA8842@morn.lan> <20160213115151.542d5d42@t450s.home> <1455532301.7504.17.camel@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: "Kevin O'Connor" , seabios@seabios.org, allen.m.kay@intel.com, qemu-devel@nongnu.org, kvm@vger.kernel.org To: Gerd Hoffmann Return-path: Received: from mx1.redhat.com ([209.132.183.28]:34854 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751193AbcBORqh (ORCPT ); Mon, 15 Feb 2016 12:46:37 -0500 In-Reply-To: <1455532301.7504.17.camel@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Mon, 15 Feb 2016 11:31:41 +0100 Gerd Hoffmann wrote: > Hi, > > > The issue is in the VM and it occurs every time the option ROM is > > executed. Standard VGA text mode displays fine (ex. SeaBIOS version > > string and boot menu), but any sort of extended graphics mode (ex. live > > CD boot menu) tries to make use of the host memory area which > > corresponds to the stolen memory area of the physical device. > > I'm wondering whenever we can just use seavgabios (and support standard > vga modes only). The reason we need the vBIOS is to turn on the LCD panel, which in turn has this dependency on the stolen memory area. I'd be pretty surprised if a generic VGA BIOS affected the panel in any way. Maybe seavgabios could be used for desktop IGD assignment, though I don't really know how to detect an attached panel. Thanks, Alex