From patchwork Sat Jun 29 02:42:34 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiongfeng Wang X-Patchwork-Id: 11023677 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C264C138D for ; Sat, 29 Jun 2019 02:45:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C7B732883D for ; Sat, 29 Jun 2019 02:45:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B9D1528889; Sat, 29 Jun 2019 02:45:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 578072883D for ; Sat, 29 Jun 2019 02:45:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726795AbfF2Cox (ORCPT ); Fri, 28 Jun 2019 22:44:53 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:8240 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726702AbfF2Cox (ORCPT ); Fri, 28 Jun 2019 22:44:53 -0400 Received: from DGGEMS410-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 298FF9071D527054F3DD; Sat, 29 Jun 2019 10:44:51 +0800 (CST) Received: from linux-ibm.site (10.175.102.37) by DGGEMS410-HUB.china.huawei.com (10.3.19.210) with Microsoft SMTP Server id 14.3.439.0; Sat, 29 Jun 2019 10:44:43 +0800 From: Xiongfeng Wang To: , , CC: , , , , , , , , Subject: [RFC PATCH v2 2/3] arm64: mark all the GICC nodes in MADT as possible cpu Date: Sat, 29 Jun 2019 10:42:34 +0800 Message-ID: <1561776155-38975-3-git-send-email-wangxiongfeng2@huawei.com> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1561776155-38975-1-git-send-email-wangxiongfeng2@huawei.com> References: <1561776155-38975-1-git-send-email-wangxiongfeng2@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We set 'cpu_possible_mask' based on the enabled GICC node in MADT. If the GICC node is disabled, we will skip initializing the kernel data structure for that CPU. To support CPU hotplug, we need to initialize some CPU related data structure in advance. This patch mark all the GICC nodes as possible CPU and only these enabled GICC nodes as present CPU. Signed-off-by: Xiongfeng Wang --- arch/arm64/kernel/setup.c | 2 +- arch/arm64/kernel/smp.c | 11 +++++------ 2 files changed, 6 insertions(+), 7 deletions(-) diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 7e541f9..7f4d12a 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -359,7 +359,7 @@ static int __init topology_init(void) for_each_online_node(i) register_one_node(i); - for_each_possible_cpu(i) { + for_each_online_cpu(i) { struct cpu *cpu = &per_cpu(cpu_data.cpu, i); cpu->hotpluggable = 1; register_cpu(cpu, i); diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c index 6dcf960..6d9983c 100644 --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -525,16 +525,14 @@ struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu) { u64 hwid = processor->arm_mpidr; - if (!(processor->flags & ACPI_MADT_ENABLED)) { - pr_debug("skipping disabled CPU entry with 0x%llx MPIDR\n", hwid); - return; - } - if (hwid & ~MPIDR_HWID_BITMASK || hwid == INVALID_HWID) { pr_err("skipping CPU entry with invalid MPIDR 0x%llx\n", hwid); return; } + if (!(processor->flags & ACPI_MADT_ENABLED)) + pr_debug("disabled CPU entry with 0x%llx MPIDR\n", hwid); + if (is_mpidr_duplicate(cpu_count, hwid)) { pr_err("duplicate CPU MPIDR 0x%llx in MADT\n", hwid); return; @@ -755,7 +753,8 @@ void __init smp_prepare_cpus(unsigned int max_cpus) if (err) continue; - set_cpu_present(cpu, true); + if ((cpu_madt_gicc[cpu].flags & ACPI_MADT_ENABLED)) + set_cpu_present(cpu, true); numa_store_cpu_info(cpu); } }