From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lorenzo Pieralisi Subject: Re: [RFC PATCH 0/5] Add smp booting support for Qualcomm ARMv8 SoCs Date: Fri, 10 Apr 2015 12:03:28 +0100 Message-ID: <20150410110328.GC25921@red-moon> References: <1428601031-5366-1-git-send-email-galak@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1428601031-5366-1-git-send-email-galak@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org To: Kumar Gala Cc: "linux-arm-msm@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "arm@kernel.org" , "devicetree@vger.kernel.org" , Catalin Marinas , Will Deacon , "abhimany@codeaurora.org" List-Id: linux-arm-msm@vger.kernel.org On Thu, Apr 09, 2015 at 06:37:06PM +0100, Kumar Gala wrote: > This patch set adds support for SMP boot on the MSM8x16 family of Qualcomm SoCs. > > To support SMP on the MSM8x16 SoCs we need to add ARMv8/64-bit SCM interfaces to > setup the boot/release addresses for the secondary CPUs. In addition we need > a uniquie set of cpu ops. I'm aware the desired methods for booting secondary > CPUs is either via spintable or PSCI. However, these SoCs are shipping with a > firmware that does not support those methods. Why ? Do not tell me you were not aware of those standard methods, because I can't believe you. If there were additional features to add to spin-table and PSCI, you were, you are and you will always be welcome to debate them. There is no justification for this patchset, honestly. Lorenzo From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754509AbbDJLDe (ORCPT ); Fri, 10 Apr 2015 07:03:34 -0400 Received: from foss.arm.com ([217.140.101.70]:55203 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751873AbbDJLDc (ORCPT ); Fri, 10 Apr 2015 07:03:32 -0400 Date: Fri, 10 Apr 2015 12:03:28 +0100 From: Lorenzo Pieralisi To: Kumar Gala Cc: "linux-arm-msm@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "arm@kernel.org" , "devicetree@vger.kernel.org" , Catalin Marinas , Will Deacon , "abhimany@codeaurora.org" Subject: Re: [RFC PATCH 0/5] Add smp booting support for Qualcomm ARMv8 SoCs Message-ID: <20150410110328.GC25921@red-moon> References: <1428601031-5366-1-git-send-email-galak@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1428601031-5366-1-git-send-email-galak@codeaurora.org> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 09, 2015 at 06:37:06PM +0100, Kumar Gala wrote: > This patch set adds support for SMP boot on the MSM8x16 family of Qualcomm SoCs. > > To support SMP on the MSM8x16 SoCs we need to add ARMv8/64-bit SCM interfaces to > setup the boot/release addresses for the secondary CPUs. In addition we need > a uniquie set of cpu ops. I'm aware the desired methods for booting secondary > CPUs is either via spintable or PSCI. However, these SoCs are shipping with a > firmware that does not support those methods. Why ? Do not tell me you were not aware of those standard methods, because I can't believe you. If there were additional features to add to spin-table and PSCI, you were, you are and you will always be welcome to debate them. There is no justification for this patchset, honestly. Lorenzo From mboxrd@z Thu Jan 1 00:00:00 1970 From: lorenzo.pieralisi@arm.com (Lorenzo Pieralisi) Date: Fri, 10 Apr 2015 12:03:28 +0100 Subject: [RFC PATCH 0/5] Add smp booting support for Qualcomm ARMv8 SoCs In-Reply-To: <1428601031-5366-1-git-send-email-galak@codeaurora.org> References: <1428601031-5366-1-git-send-email-galak@codeaurora.org> Message-ID: <20150410110328.GC25921@red-moon> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Apr 09, 2015 at 06:37:06PM +0100, Kumar Gala wrote: > This patch set adds support for SMP boot on the MSM8x16 family of Qualcomm SoCs. > > To support SMP on the MSM8x16 SoCs we need to add ARMv8/64-bit SCM interfaces to > setup the boot/release addresses for the secondary CPUs. In addition we need > a uniquie set of cpu ops. I'm aware the desired methods for booting secondary > CPUs is either via spintable or PSCI. However, these SoCs are shipping with a > firmware that does not support those methods. Why ? Do not tell me you were not aware of those standard methods, because I can't believe you. If there were additional features to add to spin-table and PSCI, you were, you are and you will always be welcome to debate them. There is no justification for this patchset, honestly. Lorenzo