From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D1E6C5B579 for ; Sat, 29 Jun 2019 02:08:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 53306215EA for ; Sat, 29 Jun 2019 02:08:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726967AbfF2CIn (ORCPT ); Fri, 28 Jun 2019 22:08:43 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:8236 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726682AbfF2CIn (ORCPT ); Fri, 28 Jun 2019 22:08:43 -0400 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 03EA9AD12CCE9E729E1A; Sat, 29 Jun 2019 10:08:40 +0800 (CST) Received: from [127.0.0.1] (10.184.52.56) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.439.0; Sat, 29 Jun 2019 10:08:34 +0800 Subject: Re: [PATCH RFC 0/3] Support CPU hotplug for ARM64 To: , , CC: , , , , , , , References: <1561720392-45907-1-git-send-email-wangxiongfeng2@huawei.com> From: Xiongfeng Wang Message-ID: <74bda3c2-e706-aa3b-441a-fb85e2a5c778@huawei.com> Date: Sat, 29 Jun 2019 10:07:10 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <1561720392-45907-1-git-send-email-wangxiongfeng2@huawei.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.184.52.56] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sorry, the third patch can't be applied to the lastest kernel. I will send another version and attach the method to test this patchset. On 2019/6/28 19:13, Xiongfeng Wang wrote: > This patchset mark all the GICC node in MADT as possible CPUs even though it > is disabled. But only those enabled GICC node are marked as present CPUs. > So that kernel will initialize some CPU related data structure in advance before > the CPU is actually hot added into the system. This patchset also implement > 'acpi_(un)map_cpu()' and 'arch_(un)register_cpu()' for ARM64. These functions are > needed to enable CPU hotplug. > > To support CPU hotplug, we need to add all the possible GICC node in MADT > including those CPUs that are not present but may be hot added later. Those > CPUs are marked as disabled in GICC nodes. > > Xiongfeng Wang (3): > ACPI / scan: evaluate _STA for processors declared via ASL Device > statement > arm64: mark all the GICC nodes in MADT as possible cpu > arm64: Add CPU hotplug support > > arch/arm64/kernel/acpi.c | 22 ++++++++++++++++++++++ > arch/arm64/kernel/setup.c | 19 ++++++++++++++++++- > arch/arm64/kernel/smp.c | 11 +++++------ > drivers/acpi/scan.c | 12 ++++++++++++ > 4 files changed, 57 insertions(+), 7 deletions(-) >