Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933409AbbGVJRr (ORCPT ); Wed, 22 Jul 2015 05:17:47 -0400 Received: from mx07-00178001.pphosted.com ([62.209.51.94]:51327 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932539AbbGVJRo (ORCPT ); Wed, 22 Jul 2015 05:17:44 -0400 Message-ID: <55AF5F95.20307@st.com> Date: Wed, 22 Jul 2015 11:17:09 +0200 From: Maxime Coquelin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.8.0 MIME-Version: 1.0 To: Peter Griffin , , , , , , , CC: , Subject: Re: [PATCH v2 1/3] ARM: STi: Add code to release secondary cores from holding pen. References: <1433856824-30689-1-git-send-email-peter.griffin@linaro.org> <1433856824-30689-2-git-send-email-peter.griffin@linaro.org> In-Reply-To: <1433856824-30689-2-git-send-email-peter.griffin@linaro.org> Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.251.16.48] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.14.151,1.0.33,0.0.0000 definitions=2015-07-22_03:2015-07-22,2015-07-22,1970-01-01 signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1675 Lines: 43 Hi Peter, On 06/09/2015 03:33 PM, Peter Griffin wrote: > Most upstream devs boot STi platform via JTAG which abuses the > boot process by setting the PC of secondary cores directly. As > a consquence, booting STi platforms via u-boot results in only > the primary core being brought up as the code to manage the > holding pen is not upstream. > > This patch adds the necessary code to bring the secondary cores > out of the holding pen. It uses the cpu-release-addr DT property > to get the address of the holding pen from the bootloader. > > With this patch booting upstream kernels via u-boot works > correctly: > > [ 0.045456] CPU: Testing write buffer coherency: ok > [ 0.045597] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 > [ 0.045734] Setting up static identity map for 0x40209000 - 0x40209098 > [ 0.065047] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 > [ 0.065081] Brought up 2 CPUs > [ 0.065089] SMP: Total of 2 processors activated (5983.43 BogoMIPS). > [ 0.065092] CPU: All CPU(s) started in SVC mode. > > Signed-off-by: Peter Griffin > Acked-by: Maxime Coquelin > --- > arch/arm/mach-sti/headsmp.S | 1 + > arch/arm/mach-sti/platsmp.c | 55 ++++++++++++++++++++++++++++++++++++++++++--- > arch/arm/mach-sti/smp.h | 2 ++ > 3 files changed, 55 insertions(+), 3 deletions(-) > > Applied to sti-soc-for-v4.3. Thanks! Maxime -- 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/