From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kumar Gala Subject: Re: [RFC PATCH 0/5] Add smp booting support for Qualcomm ARMv8 SoCs Date: Fri, 10 Apr 2015 10:25:54 -0500 Message-ID: References: <1428601031-5366-1-git-send-email-galak@codeaurora.org> <20150410110328.GC25921@red-moon> Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT Return-path: In-Reply-To: <20150410110328.GC25921@red-moon> Sender: linux-kernel-owner@vger.kernel.org To: Lorenzo Pieralisi 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 Apr 10, 2015, at 6:03 AM, Lorenzo Pieralisi wrote: > 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 The justification for this patchset is support for a hardware platform that exists in the world. The kernel usual is willing to accept such things as long as the code is reasonable. - k -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756272AbbDJP0a (ORCPT ); Fri, 10 Apr 2015 11:26:30 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:50604 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755963AbbDJPZ7 convert rfc822-to-8bit (ORCPT ); Fri, 10 Apr 2015 11:25:59 -0400 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) Subject: Re: [RFC PATCH 0/5] Add smp booting support for Qualcomm ARMv8 SoCs From: Kumar Gala In-Reply-To: <20150410110328.GC25921@red-moon> Date: Fri, 10 Apr 2015 10:25:54 -0500 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" Content-Transfer-Encoding: 8BIT Message-Id: References: <1428601031-5366-1-git-send-email-galak@codeaurora.org> <20150410110328.GC25921@red-moon> To: Lorenzo Pieralisi X-Mailer: Apple Mail (2.1878.6) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Apr 10, 2015, at 6:03 AM, Lorenzo Pieralisi wrote: > 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 The justification for this patchset is support for a hardware platform that exists in the world. The kernel usual is willing to accept such things as long as the code is reasonable. - k -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project From mboxrd@z Thu Jan 1 00:00:00 1970 From: galak@codeaurora.org (Kumar Gala) Date: Fri, 10 Apr 2015 10:25:54 -0500 Subject: [RFC PATCH 0/5] Add smp booting support for Qualcomm ARMv8 SoCs In-Reply-To: <20150410110328.GC25921@red-moon> References: <1428601031-5366-1-git-send-email-galak@codeaurora.org> <20150410110328.GC25921@red-moon> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Apr 10, 2015, at 6:03 AM, Lorenzo Pieralisi wrote: > 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 The justification for this patchset is support for a hardware platform that exists in the world. The kernel usual is willing to accept such things as long as the code is reasonable. - k -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project