Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759935Ab3EWXPm (ORCPT ); Thu, 23 May 2013 19:15:42 -0400 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:56446 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759888Ab3EWXPl (ORCPT ); Thu, 23 May 2013 19:15:41 -0400 Date: Fri, 24 May 2013 00:15:31 +0100 From: Russell King - ARM Linux To: Stephen Boyd Cc: Brian Swetland , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] ARM: avoid mis-detecting some V7 cores in the decompressor Message-ID: <20130523231531.GT18614@n2100.arm.linux.org.uk> References: <1368049671-22879-1-git-send-email-sboyd@codeaurora.org> <5193E424.9090605@codeaurora.org> <519E57D2.3050000@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <519E57D2.3050000@codeaurora.org> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1278 Lines: 31 On Thu, May 23, 2013 at 10:54:26AM -0700, Stephen Boyd wrote: > On 05/15/13 12:38, Stephen Boyd wrote: > > On 05/08/13 14:47, Stephen Boyd wrote: > >> From: Brian Swetland > >> > >> Currently v7 CPUs with an MIDR that has no bits set in the range > >> [16:12] will be detected as old ARM CPUs with no caches and so > >> the cache will never be turned on during decompression. ARM's > >> Cortex chips have an 0xC in the range [16:12] so they never match > >> this entry, but Qualcomm's Scorpion and Krait processors never > >> set these bits to anything besides 0 so they always match. > >> > >> Skip this entry if we've compiled in support for v7 CPUs. This > >> allows kernel decompression to happen nearly instantly instead of > >> taking over 20 seconds. > >> > >> Signed-off-by: Brian Swetland > >> [sboyd: Clarified and extended commit text] > >> Signed-off-by: Stephen Boyd > >> --- > > Ping? > > Russell, shall I add this to the patch tracker? Yes please. -- 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/