From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTP id 11684DDEFB for ; Thu, 21 Jun 2007 22:37:58 +1000 (EST) Subject: Re: [RFC/PATCH] powerpc: MPC7450 L2 HW cache flush feature utilization From: Benjamin Herrenschmidt To: "Mark A. Greer" In-Reply-To: <20070615212016.GB18055@mag.az.mvista.com> References: <1181729973.25586.31.camel@dolphin.spb.rtsoft.ru> <467176EB.7060404@ru.mvista.com> <6c416bf9f79a648fc82f64619aca86de@kernel.crashing.org> <20070615212016.GB18055@mag.az.mvista.com> Content-Type: text/plain Date: Thu, 21 Jun 2007 22:37:22 +1000 Message-Id: <1182429443.24740.8.camel@localhost.localdomain> Mime-Version: 1.0 Cc: linuxppc-dev list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2007-06-15 at 14:20 -0700, Mark A. Greer wrote: > On Fri, Jun 15, 2007 at 10:14:24AM +0200, Segher Boessenkool wrote: > > > > I've double checked this. All processors considered 7450 in the kernel > > > are covered by MPC7450 RISC Microprocessor Family Reference Manual > > > where hardware cache flushing procedure is described. > > > > Nice. Now all that remains to be done is for the patch to > > be tested on actual hardware for at least a few of those > > other CPUs. Any volunteers? > > I just booted & played around on a prpmc2800e (7447A, 512MB) with > this patch and it seemed to work fine. > > I *may* have some old sandpoint 745x modules that still work but > I'll have to get the sandpoint working in arch/powerpc again. > I'll try to get to that in a week or so. The thing that needs torture is the powerbook sleep/wakeup code. That's where all the cache flushing issues have been biting in the past. Ben.