From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753287AbcHZMnr (ORCPT ); Fri, 26 Aug 2016 08:43:47 -0400 Received: from mail-ua0-f175.google.com ([209.85.217.175]:36006 "EHLO mail-ua0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751976AbcHZMnn (ORCPT ); Fri, 26 Aug 2016 08:43:43 -0400 MIME-Version: 1.0 In-Reply-To: <1472209971-32469-1-git-send-email-Anson.Huang@nxp.com> References: <1472209971-32469-1-git-send-email-Anson.Huang@nxp.com> From: Fabio Estevam Date: Fri, 26 Aug 2016 09:43:08 -0300 Message-ID: Subject: Re: [PATCH 0/3] Add SMP support for i.MX7D To: Anson Huang Cc: "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , linux-kernel , Mark Rutland , Russell King - ARM Linux , "robh+dt@kernel.org" , Sascha Hauer , Fabio Estevam , Shawn Guo Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Anson, On Fri, Aug 26, 2016 at 8:12 AM, Anson Huang wrote: > i.MX7D has 2 Cortex-A7 ARM cores, and it has a different GPC design > than i.MX6, so this patch set adds a new GPCV2 driver for i.MX7D, > and also adds runtime check in SMP code to support both Cortex-A9 > and Cortex-A7 ARM cores. > > With this patch set, i.MX7D can boot up SMP kernel with 2 CPUs. Currently mx7d can boot the 2 CPUs if you use PSCI in the bootloader. Give mainline U-Boot a try and it will boot the 2 CPUs via PSCI. There was an attempt to add gpcv2 support at: https://patchwork.kernel.org/patch/6919831/ , and Shawn suggested to go to the PSCI approach. PSCI for mx7 is still missing suspend support though. Regards, Fabio Estevam