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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 B3AD9C43458 for ; Thu, 9 Jul 2026 11:42:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Cc:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=jCsAiNzXLnSt8Exj9eyYpp9m+fWK6alrT5RLyck+wvA=; b=NQABtRd+/1ltAU32M8Rvn1Gl19 ZC5WuJORycTuXy/JdcEpCYAvj8PDgtQE7F3uc79W9fmv0+JWunllPyqra9502lVlkSXdkCPHfiy9M lh/tXgFA73xp6zON1n5ko1NhpkASr+IMDbSo/wBNKZQ41mSXkHbAEDTHR0it5w0heZYZGFfna8/sY d6aWN+z64sGPPxgPsRJa5GlqafdtxnmUKMy/j2RLItdwaLZlWV6BYtauO7fqtrTVm8DJklJu4T6K8 E4lIbPaXP6XxEvq5Wpzst7ppcaphtdxNDlw1gNkCJlrhqdkuXYPIH6CdnXskrAl0wgEUWGBsnPY9L e6Z0YEgA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1whmo6-000000028gU-0rIL; Thu, 09 Jul 2026 11:20:42 +0000 Received: from canpmsgout05.his.huawei.com ([113.46.200.220]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1whmo3-000000028bd-0YuC for linux-arm-kernel@lists.infradead.org; Thu, 09 Jul 2026 11:20:41 +0000 dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=jCsAiNzXLnSt8Exj9eyYpp9m+fWK6alrT5RLyck+wvA=; b=ylJoG4UFdghbxtYEvPIt/SfSw8mGuBQcMTt4Tlqb2OfSuD9eHH/TgZRibMa9NB7vu4msTQOzF J8BzA7tS2QoiFwlshvQd8dkJoP9SMNEuD9jc8X7CEJcxs/NSdYPK4Yb28fRY1Zd2pz5qWoW7Sof 8k/JP/FTKSSGsiHQqdJPWkY= Received: from mail.maildlp.com (unknown [172.19.162.140]) by canpmsgout05.his.huawei.com (SkyGuard) with ESMTPS id 4gwsjd64CNz12LDl; Thu, 9 Jul 2026 19:11:49 +0800 (CST) Received: from dggpemf500011.china.huawei.com (unknown [7.185.36.131]) by mail.maildlp.com (Postfix) with ESMTPS id 7030D2012A; Thu, 9 Jul 2026 19:20:28 +0800 (CST) Received: from [10.67.109.254] (10.67.109.254) by dggpemf500011.china.huawei.com (7.185.36.131) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Thu, 9 Jul 2026 19:20:25 +0800 Message-ID: <1350371d-db50-4c3d-adae-6657e2c0e3fc@huawei.com> Date: Thu, 9 Jul 2026 19:20:24 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 00/12] arm64: Add HOTPLUG_PARALLEL support for secondary CPUs To: Shrikanth Hegde , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , References: <20260624092537.2916971-1-ruanjinjie@huawei.com> From: Jinjie Ruan In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.67.109.254] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To dggpemf500011.china.huawei.com (7.185.36.131) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260709_042039_643581_BAD73520 X-CRM114-Status: UNSURE ( 9.41 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 6/29/2026 12:04 PM, Shrikanth Hegde wrote: > > > On 6/24/26 2:55 PM, Jinjie Ruan wrote: >> Support for parallel secondary CPU bringup is already utilized by x86, >> MIPS, and RISC-V. This patch brings this capability to the arm64 >> architecture. >> >> Introduce CONFIG_HOTPLUG_PARALLEL_SMT to avoid primary SMT threads >> to boot first constraint. >> >> And add a 'cpu' parameter to update_cpu_boot_status() to allow updating >> the boot status at a per-CPU granularity during parallel bringup. >> >> Rework the global `secondary_data` and `__early_cpu_boot_status` accessed >> during early boot into per-CPU arrays to allow secondary CPUs to boot >> in parallel. >> > > Shouldn't this be called CONFIG_BRINGUP_PARALLEL instead? > Hotplug usually means disable/enable CPU at runtime. According to my understanding, the parallelism here includes CPU bringup and hotplug.