From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <segher@kernel.crashing.org>
Received: from mail-in-08.arcor-online.net (mail-in-08.arcor-online.net
	[151.189.21.48])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(Client CN "mx.arcor.de",
	Issuer "Thawte Premium Server CA" (verified OK))
	by ozlabs.org (Postfix) with ESMTP id 25F4BDDE36
	for <linuxppc-dev@ozlabs.org>; Sun, 24 Jun 2007 01:46:11 +1000 (EST)
In-Reply-To: <467BE91F.1030003@ru.mvista.com>
References: <1181729973.25586.31.camel@dolphin.spb.rtsoft.ru>	<db0d38e5b5e1a9a3a7fe35d25ebd357a@kernel.crashing.org>	<467176EB.7060404@ru.mvista.com>	<6c416bf9f79a648fc82f64619aca86de@kernel.crashing.org>	<20070615212016.GB18055@mag.az.mvista.com>
	<1182429443.24740.8.camel@localhost.localdomain>
	<467BE91F.1030003@ru.mvista.com>
Mime-Version: 1.0 (Apple Message framework v623)
Content-Type: text/plain; charset=US-ASCII; format=flowed
Message-Id: <3372b921591ca9731d2703f04e6c35f1@kernel.crashing.org>
From: Segher Boessenkool <segher@kernel.crashing.org>
Subject: Re: [RFC/PATCH] powerpc: MPC7450 L2 HW cache flush feature utilization
Date: Sat, 23 Jun 2007 17:46:01 +0200
To: Vladislav Buzov <vbuzov@ru.mvista.com>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.ozlabs.org>
List-Unsubscribe: <https://ozlabs.org/mailman/listinfo/linuxppc-dev>,
	<mailto:linuxppc-dev-request@ozlabs.org?subject=unsubscribe>
List-Archive: <http://ozlabs.org/pipermail/linuxppc-dev>
List-Post: <mailto:linuxppc-dev@ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@ozlabs.org?subject=help>
List-Subscribe: <https://ozlabs.org/mailman/listinfo/linuxppc-dev>,
	<mailto:linuxppc-dev-request@ozlabs.org?subject=subscribe>

> Note that 745x processors have L3 cache installed and may have the same
> problem requiring similar code modifications to use L3 hardware 
> flushing
> mechanism.

What does the erratum say?

The L3 is a very different beast from the L2, IIRC it is
a pure victim cache so it cannot have this problem at all?


Segher