From patchwork Mon May 8 19:44:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 91242 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp2392451vqo; Mon, 8 May 2023 12:55:31 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4t+UN+2KBdroypHbVTjfGEGniZThTcU+IDOVTSpSDNyqiNxZ0NKgHQVzgeqqx8kaAt65n5 X-Received: by 2002:a05:6a20:e309:b0:ff:b162:6482 with SMTP id nb9-20020a056a20e30900b000ffb1626482mr8848345pzb.11.1683575731175; Mon, 08 May 2023 12:55:31 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1683575731; cv=none; d=google.com; s=arc-20160816; b=GtpYFXhBUafHGIoklA5dliyALEs6qYjdniRcVSK/JZBt9D1d4Cv99QruIDq9AjGik5 BpxmliUmGGG2e8xbD6lllO+YFtizapWPtCta3vNZSMzKx9wLyQNPmUBAQMhd+0WY3CC2 A/1hRR0ZK7WxW1EE6TYHW62HSR66YTkNWGWO6tj+XD/auBjyYxCCLgL0zd1e9J4Y8Rbu cCIHzgKX9rWLeVT3RWO8WCoG1c7gpZWAD/W81lBdrkCxqGEO+HFkIWEfl2yv+9xnyOoS cbo3TjtvEiF1UV/V//tZswqsxo6lOnbv0FFsCpaqLIA8ZbT4FbLiSwrFbh79JVHU+k+3 P+9Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:date:mime-version:references:subject:cc:to:from :dkim-signature:dkim-signature:message-id; bh=38nzuLvukobfje6Ccppy0BhMMd+JJk7+K0e3k3P15Wg=; b=cuMhe3KC1d+SzRSXi23Kkz7rG/v/xCIKjyI9Qbh8mVWklfjqBq+JSTRa+p4eAog0Ue NshIxSnEGJsOiLYTHrkowkebjeVwP9PACy4yQToy5MHAmnhX/GPhoLAEBrZ433hDikcM YwITjTLR9MgO85tph1kIhniCwrCUC/ILGGDvHr2FkLwLW6AbInJlcgg1RrwwltNpgA1Y DLbwl+8rdiw10Ug0lkXYH8WaDm9reCziTx38GgGjfXYEzW2eNqnCR6kGlKmtzkgKGR40 zmpSDktr7w2gtYFwwnhlkTg7z2eJ5qPY4t1ieCM/bzkDknvel4lgypqB53ukm4OiKTs3 helQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=x5uunjrf; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id x2-20020a656aa2000000b0050bfc85d989si9501092pgu.154.2023.05.08.12.55.15; Mon, 08 May 2023 12:55:31 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linutronix.de header.s=2020 header.b=x5uunjrf; dkim=neutral (no key) header.i=@linutronix.de header.s=2020e; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=linutronix.de Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233943AbjEHTpY (ORCPT + 99 others); Mon, 8 May 2023 15:45:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57870 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233846AbjEHToq (ORCPT ); Mon, 8 May 2023 15:44:46 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E31DE7D8A; Mon, 8 May 2023 12:44:07 -0700 (PDT) Message-ID: <20230508185218.413540718@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1683575041; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=38nzuLvukobfje6Ccppy0BhMMd+JJk7+K0e3k3P15Wg=; b=x5uunjrfWzFDxVEDVb12W2XtAz1xdLN26NVHk7bMNEu2wIJNaum7qGKPG0dROx5n0HhLC+ FzBIUNB9IVFoDocC8+UO+48hmJZTHkBagkRSbcBi10tPYzBz2N+KBu3+t/DwlLjK8qgbHm Zyl2slxhswI4y0jqXj5mdHQ7jfB6T53pzIasGJrkcbdNjcE/FqTbh3cIh4s2CI2dpENglT jZGblTZh1KTfeLW19FXrR8et4/tPPGpgkP+CMulFHzL902fUKU7E5w1yXi6/rZi2EGU8tO CSr4Jls1MoB22W6EUMLB/NCwWjqQzCr6exaZi0Y+dcSIy9UXOvzD4rMbjXRcvg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1683575041; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=38nzuLvukobfje6Ccppy0BhMMd+JJk7+K0e3k3P15Wg=; b=OFaURbehZY+bjBk6HdPJsuKX1EooATeyF0S/YDbEsa+/7byZljllwL7I/PloYv0yfuXe68 qGHlWRIfIq35xrAg== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, David Woodhouse , Andrew Cooper , Brian Gerst , Arjan van de Veen , Paolo Bonzini , Paul McKenney , Tom Lendacky , Sean Christopherson , Oleksandr Natalenko , Paul Menzel , "Guilherme G. Piccoli" , Piotr Gorski , Usama Arif , Juergen Gross , Boris Ostrovsky , xen-devel@lists.xenproject.org, Russell King , Arnd Bergmann , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Will Deacon , Guo Ren , linux-csky@vger.kernel.org, Thomas Bogendoerfer , linux-mips@vger.kernel.org, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, Mark Rutland , Sabin Rapan , "Michael Kelley (LINUX)" Subject: [patch v3 21/36] [patch V2 21/38] ARM: smp: Switch to hotplug core state synchronization References: <20230508181633.089804905@linutronix.de> MIME-Version: 1.0 Date: Mon, 8 May 2023 21:44:00 +0200 (CEST) X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1765357105388936419?= X-GMAIL-MSGID: =?utf-8?q?1765357105388936419?= From: Thomas Gleixner Switch to the CPU hotplug core state tracking and synchronization mechanim. No functional change intended. Signed-off-by: Thomas Gleixner Tested-by: Michael Kelley --- arch/arm/Kconfig | 1 + arch/arm/include/asm/smp.h | 2 +- arch/arm/kernel/smp.c | 18 +++++++----------- 3 files changed, 9 insertions(+), 12 deletions(-) --- --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -124,6 +124,7 @@ config ARM select HAVE_SYSCALL_TRACEPOINTS select HAVE_UID16 select HAVE_VIRT_CPU_ACCOUNTING_GEN + select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU select IRQ_FORCED_THREADING select MODULES_USE_ELF_REL select NEED_DMA_MAP_STATE --- a/arch/arm/include/asm/smp.h +++ b/arch/arm/include/asm/smp.h @@ -64,7 +64,7 @@ extern void secondary_startup_arm(void); extern int __cpu_disable(void); -extern void __cpu_die(unsigned int cpu); +static inline void __cpu_die(unsigned int cpu) { } extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -288,15 +288,11 @@ int __cpu_disable(void) } /* - * called on the thread which is asking for a CPU to be shutdown - - * waits until shutdown has completed, or it is timed out. + * called on the thread which is asking for a CPU to be shutdown after the + * shutdown completed. */ -void __cpu_die(unsigned int cpu) +void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) { - if (!cpu_wait_death(cpu, 5)) { - pr_err("CPU%u: cpu didn't die\n", cpu); - return; - } pr_debug("CPU%u: shutdown\n", cpu); clear_tasks_mm_cpumask(cpu); @@ -336,11 +332,11 @@ void __noreturn arch_cpu_idle_dead(void) flush_cache_louis(); /* - * Tell __cpu_die() that this CPU is now safe to dispose of. Once - * this returns, power and/or clocks can be removed at any point - * from this CPU and its cache by platform_cpu_kill(). + * Tell cpuhp_bp_sync_dead() that this CPU is now safe to dispose + * of. Once this returns, power and/or clocks can be removed at + * any point from this CPU and its cache by platform_cpu_kill(). */ - (void)cpu_report_death(); + cpuhp_ap_report_dead(); /* * Ensure that the cache lines associated with that completion are