From mboxrd@z Thu Jan 1 00:00:00 1970 From: Maxime Coquelin Subject: Re: [PATCH 1/2] ARM: STi: Add code to release secondary cores from holding pen. Date: Tue, 9 Jun 2015 11:17:41 +0200 Message-ID: <5576AF35.1020100@st.com> References: <1433780219-1245-1-git-send-email-peter.griffin@linaro.org> <1433780219-1245-2-git-send-email-peter.griffin@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1433780219-1245-2-git-send-email-peter.griffin@linaro.org> Sender: linux-kernel-owner@vger.kernel.org To: Peter Griffin , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, patrice.chotard@st.com, srinivas.kandagatla@gmail.com Cc: lee.jones@linaro.org, devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org Hi Peter, On 06/08/2015 06:16 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 > --- > arch/arm/mach-sti/headsmp.S | 1 + > arch/arm/mach-sti/platsmp.c | 56 ++++++++++++++++++++++++++++++++++++++++++--- > arch/arm/mach-sti/smp.h | 2 ++ > 3 files changed, 56 insertions(+), 3 deletions(-) > > diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/platsmp.c > index d4b624f..6597ed8 100644 > --- a/arch/arm/mach-sti/platsmp.c > +++ b/arch/arm/mach-sti/platsmp.c > > struct smp_operations __initdata sti_smp_ops = { > @@ -114,3 +163,4 @@ struct smp_operations __initdata sti_smp_ops = { > .smp_secondary_init = sti_secondary_init, > .smp_boot_secondary = sti_boot_secondary, > }; > + Please remove trailing line. Once fixed, you can add: Acked-by: Maxime Coquelin Thanks! Maxime