From patchwork Tue Oct 29 09:53:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bibo Mao X-Patchwork-Id: 13854575 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 788B0D2AB12 for ; Tue, 29 Oct 2024 09:54:55 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t5iv5-0004w6-Ij; Tue, 29 Oct 2024 05:53:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t5iv3-0004vU-RP for qemu-devel@nongnu.org; Tue, 29 Oct 2024 05:53:45 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t5iv2-0007Mh-2r for qemu-devel@nongnu.org; Tue, 29 Oct 2024 05:53:45 -0400 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8BxeeGgsCBn7ZUbAA--.57740S3; Tue, 29 Oct 2024 17:53:36 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMCxyOKfsCBnMz0mAA--.95S2; Tue, 29 Oct 2024 17:53:35 +0800 (CST) From: Bibo Mao To: Song Gao , Paolo Bonzini Cc: Jiaxun Yang , qemu-devel@nongnu.org Subject: [PATCH v2 0/4] hw/loongarch/virt: Add cpu hotplug support Date: Tue, 29 Oct 2024 17:53:31 +0800 Message-Id: <20241029095335.2219343-1-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 MIME-Version: 1.0 X-CM-TRANSID: qMiowMCxyOKfsCBnMz0mAA--.95S2 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Received-SPF: pass client-ip=114.242.206.163; envelope-from=maobibo@loongson.cn; helo=mail.loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org LoongArch cpu hotplug is based on ACPI GED device, there is a little change about ipi and extioi device, the value of num-cpu property is maximum cpu number rather than present cpu number. It can be verified with qemu command: qemu-system-loongarch64 -smp 2,maxcpus=16,sockets=4,cores=4,threads=1 and vcpu can be added or remove with hmp command: device_add la464-loongarch-cpu,socket-id=0,core-id=2,thread-id=0,id=cpu-2 device_del cpu-2 --- v1 ... v2: 1. Add new property hw-id, property hw-id is set for cold-added CPUs, and property socket-id/core-id/thread-id is set for hot-added CPUs. The two properties can be generated from each other. 2. Use general hotplug api such as hotplug_handler_pre_plug etc 3. Reorganize the patch order, split the patch set into 4 small patches. --- Bibo Mao (4): hw/loongarch/virt: Add CPU topology support hw/loongarch/virt: Implement cpu plug interface hw/loongarch/virt: Update the ACPI table for hotplug cpu hw/loongarch/virt: Enable cpu hotplug feature on virt machine docs/system/loongarch/virt.rst | 31 ++++ hw/loongarch/Kconfig | 1 + hw/loongarch/acpi-build.c | 35 +++- hw/loongarch/virt.c | 293 +++++++++++++++++++++++++++++++-- include/hw/loongarch/virt.h | 3 + target/loongarch/cpu.c | 25 +++ target/loongarch/cpu.h | 17 ++ 7 files changed, 385 insertions(+), 20 deletions(-) base-commit: e67b7aef7c7f67ecd0282e903e0daff806d5d680