From patchwork Thu May 4 19:02:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 13231565 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8791EC7EE2E for ; Thu, 4 May 2023 19:04:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230120AbjEDTEC (ORCPT ); Thu, 4 May 2023 15:04:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229746AbjEDTD1 (ORCPT ); Thu, 4 May 2023 15:03:27 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E1BB102; Thu, 4 May 2023 12:02:43 -0700 (PDT) Message-ID: <20230504185937.700483457@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1683226959; 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=o04fXgOhQs8+8CE7g0ZkhrpkLD4QHZg/LLM7Otp+9z8=; b=p4kcKoUjBHHJo7zBT76SAr4kx217XWJeqQlJZM4VxHPykLQrWLTEC/uzx8rVhbv5iqkHWl eKFtH9Dh+4qwsJ89ZP4rLm01HMJyfuh1U+U+HK5bkx7PCIfmaji3wiKDM0hoVurLEfzD81 Wt5Ubm2jEjitMnzdFcIqEG1m9GNIikM3c5w8xOJBg2D9IGfl3i1Bdd22uIIaFwPx6R+oIN 02fFHC7cYoeNHnd0KZn/7sG2vBaI1ZwTr6vd36gfFqo6mvp2OfPm/JhGUYVjsHiJsALYHO f8H4F6s4Sw0iVizvLScdCi66AVg3wSgMwKU7em9hN7nVzpd/ip3L0uFyKgVW2A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1683226959; 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=o04fXgOhQs8+8CE7g0ZkhrpkLD4QHZg/LLM7Otp+9z8=; b=ZnZlGAwTWV21lQJdfFlOE3KOrdxbCyckyIQwnUuLhsAipHYSOksGllyP3kynqMPIKSFyh4 3HRt8jQRFFxBADCA== 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 V2 25/38] parisc: Switch to hotplug core state synchronization References: <20230504185733.126511787@linutronix.de> MIME-Version: 1.0 Date: Thu, 4 May 2023 21:02:38 +0200 (CEST) Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org From: Thomas Gleixner Switch to the CPU hotplug core state tracking and synchronization mechanim. No functional change intended. Signed-off-by: Thomas Gleixner Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: linux-parisc@vger.kernel.org --- arch/parisc/Kconfig | 1 + arch/parisc/kernel/process.c | 4 ++-- arch/parisc/kernel/smp.c | 7 +++---- 3 files changed, 6 insertions(+), 6 deletions(-) --- --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -57,6 +57,7 @@ config PARISC select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_REGS_AND_STACK_ACCESS_API + select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU select GENERIC_SCHED_CLOCK select GENERIC_IRQ_MIGRATION if SMP select HAVE_UNSTABLE_SCHED_CLOCK if SMP --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -166,8 +166,8 @@ void __noreturn arch_cpu_idle_dead(void) local_irq_disable(); - /* Tell __cpu_die() that this CPU is now safe to dispose of. */ - (void)cpu_report_death(); + /* Tell the core that this CPU is now safe to dispose of. */ + cpuhp_ap_report_dead(); /* Ensure that the cache lines are written out. */ flush_cache_all_local(); --- a/arch/parisc/kernel/smp.c +++ b/arch/parisc/kernel/smp.c @@ -500,11 +500,10 @@ int __cpu_disable(void) void __cpu_die(unsigned int cpu) { pdc_cpu_rendezvous_lock(); +} - if (!cpu_wait_death(cpu, 5)) { - pr_crit("CPU%u: cpu didn't die\n", cpu); - return; - } +void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) +{ pr_info("CPU%u: is shutting down\n", cpu); /* set task's state to interruptible sleep */