From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rene Herman Subject: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc. Date: Mon, 17 Dec 2007 19:54:58 +0100 Message-ID: <4766C602.5050409@keyaccess.nl> 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> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel , Linux kernel , Avi Kivity , "David P. Reed" , Ingo Molnar , Pavel Machek , "H. Peter Anvin" To: "linux-os (Dick Johnson)" Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org 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. ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace