Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935474AbXEICXm (ORCPT ); Tue, 8 May 2007 22:23:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S967626AbXEICXe (ORCPT ); Tue, 8 May 2007 22:23:34 -0400 Received: from terminus.zytor.com ([192.83.249.54]:51155 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967548AbXEICXe (ORCPT ); Tue, 8 May 2007 22:23:34 -0400 Message-ID: <46413087.2020505@zytor.com> Date: Tue, 08 May 2007 19:23:03 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.0 (X11/20070419) MIME-Version: 1.0 To: "Eric W. Biederman" CC: yhlu , Jeremy Fitzhardinge , vgoyal@in.ibm.com, Gerd Hoffmann , Jeff Garzik , patches@x86-64.org, linux-kernel@vger.kernel.org, virtualization , Rusty Russell , Andi Kleen , Ingo Molnar Subject: Re: [patches] [PATCH] [21/22] x86_64: Extend bzImage protocol for relocatable bzImage References: <4634483E.9030307@goop.org> <86802c440705080941y69ddd5d6lab170c5f3967f148@mail.gmail.com> <86802c440705081033s19365843i5b955ae175de73eb@mail.gmail.com> <86802c440705081151r6bfd82e4o50c6a34b2b2a833f@mail.gmail.com> <86802c440705081500x682ee098y7d51f7bb98dbcff6@mail.gmail.com> <4640F4B3.30408@goop.org> <4640FB2C.2060300@zytor.com> <86802c440705081541v7d0773cek2c5fae1854b68bbc@mail.gmail.com> <46410403.4050802@zytor.com> In-Reply-To: X-Enigmail-Version: 0.95.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 867 Lines: 21 Eric W. Biederman wrote: > > I expect I can find a few more examples where we specify > video_cols and video_lines but we use video_mode == 0. > > Going farther mode 0x00 is a BIOS 40x25 mode. So the patch below is > not always safe even if we boot the bzImage. It is just highly > unlikely anyone would start the kernel in 40x25 text mode. > Mode 0x00 is, at least theoretically, BIOS 40x25 *grayscale*; this mode (and mode 0x02 which is the same thing in 80x25) were as far as I know only ever used with composite monitors off CGA cards, i.e. functionally never. Actual monochrome monitors used mode 0x07. -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/