From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: Re: [PATCH 3/8] acpi-cpufreq: merge acpi functionality of cpufreq drivers Date: Mon, 7 Aug 2006 12:55:28 -0400 Message-ID: <20060807165528.GO13393@redhat.com> References: <44CE4F8A.5060600@linux.intel.com> <20060802092733.GI17014@poupinou.org> <44D0F292.8090403@linux.intel.com> <20060803161130.GL17014@poupinou.org> <20060803162024.GA22448@redhat.com> <20060804092212.GO17014@poupinou.org> <20060804170338.GK7265@redhat.com> <20060807084849.GP17014@poupinou.org> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <20060807084849.GP17014@poupinou.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: cpufreq-bounces@lists.linux.org.uk Errors-To: cpufreq-bounces+glkc-cpufreq=m.gmane.org+glkc-cpufreq=m.gmane.org@lists.linux.org.uk Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Bruno Ducrot Cc: cpufreq@lists.linux.org.uk On Mon, Aug 07, 2006 at 10:48:49AM +0200, Bruno Ducrot wrote: > On Fri, Aug 04, 2006 at 01:03:38PM -0400, Dave Jones wrote: > > On Fri, Aug 04, 2006 at 11:22:12AM +0200, Bruno Ducrot wrote: > > > > > > Newer VIA CPUs rely on this driver rather than longhaul for example. > > > > > > Ah I see. In fact we could add them already to > > > speedstep-centrino.c easily. > > > > We could, though they need to rely on the ACPI tables rather than > > hardcoded tables (as we've no way to distinguish regular from ULV > > parts afaics), at which point it doesn't really buy us anything > > over just using acpi-cpufreq which works without any modifications. > > I don't get it. speedstep-centrino does support both hardcoded tables > and ACPI tables (but I agree it would be better to add this support > to acpi-cpufreq instead of speedstep-centrino). > > FYI FreeBSD support VIA C7-M processors with hardcoded tables. They > use MSR_IA32_PERF_STATUS, bit 31 to 64, in order to distinguish various > variants of those processors (and Intel processors as well btw). > See /sys/i386/cpufreq/est.c > http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/src/sys/i386/cpufreq/est.c?rev=1.11&content-type=text/plain Hmm, I notice they mention a much newer rev of the BIOS writers guide than what I had, maybe mine missed something important (or perhaps I need to go read it again). Dave -- http://www.codemonkey.org.uk