Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759123AbXLQS44 (ORCPT ); Mon, 17 Dec 2007 13:56:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753937AbXLQS4s (ORCPT ); Mon, 17 Dec 2007 13:56:48 -0500 Received: from ug-out-1314.google.com ([66.249.92.169]:34178 "EHLO ug-out-1314.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753354AbXLQS4r (ORCPT ); Mon, 17 Dec 2007 13:56:47 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding:from; b=s5GysvweLGsF3p6tknfpt7/JK2K76a82d7XPyAENuJwfPi7nhk9LOqbG8viEn4Ykvd8ktPBA+m8iTY+B6QN/KqSs9xPtuRbibdiW58zm2SoLNmJAfce7S240CUx3JPs23Hqevi5DezPWyyIz6OUx4mVdnYkgsoUVz02Al8DGlXI= Message-ID: <4766C602.5050409@keyaccess.nl> Date: Mon, 17 Dec 2007 19:54:58 +0100 User-Agent: Thunderbird 2.0.0.9 (X11/20071031) MIME-Version: 1.0 To: "linux-os (Dick Johnson)" CC: "David P. Reed" , Avi Kivity , Thomas Gleixner , Linux kernel , Ingo Molnar , "H. Peter Anvin" , Pavel Machek , kvm-devel Subject: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc. References: <466F0941.9060201@reed.com> <1181682498.8176.224.camel@chaos> <469578CD.3080609@reed.com> <1184216528.12353.203.camel@chaos> <1184218962.12353.209.camel@chaos> <46964352.7040301@reed.com> <1184253339.12353.223.camel@chaos> <469697C6.50903@reed.com> <1184274754.12353.254.camel@chaos> <4761F193.7090400@reed.com> <4762AA68.9030507@qumranet.com> <4763385E.9040106@reed.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit From: Rene Herman Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 669 Lines: 15 On 17-12-07 19:14, linux-os (Dick Johnson) wrote: > Attached is a patch that changes the outs to ins on port 0x80. No, that isn't useful. Only a write is "guaranteed" to make ISA/LPC meaning the timing for a read varies wildly. See the in/out cycles results posted earlier. Was also reading the Intel PIIX(3) chiset datasheet today which specifically mentions that only writes flow through to ISA, reads do not. Rene. -- 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/