From patchwork Fri Apr 14 23:44:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 13212161 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 911F9C77B71 for ; Fri, 14 Apr 2023 23:49:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:MIME-Version:References:Subject:Cc :To:From:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: List-Owner; bh=VvzYY8Bqy0Rk5fQN/yxIAPOPaiPpGjwIq23vmaQcBb4=; b=wWnsDRRF145Gvy VcCMlS57W2eUJ3MqaGE7ACbkiEDN9mZzzhgTxKU4mg8dxK6wtDI/E8X+mEAEbgDXhRQvRpW9Ddh5x XzkQzHQO96Roz8SjLNziJ+3L388Zs3d66k48kaxHMEIWFVF25/lMZFdt6o7guowvvTahSO2BLrqPm iiWdKo3wnriXmY9zpcpxGmPs41GWEupYjV7hoQh++K0tSc64dppsKtpLyeG9ElY/BUCLCw1rhSXh0 prS5ywWCr7ArDcwI1+2GX1PHlKQC9W7ZaPahrHSr0FWLEhS7W9im6zmAeOGe7BOD7sYXpYhwRdXcl AYxJUmnJ8N8wD0PE1rxA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pnT9S-00AnRS-2A; Fri, 14 Apr 2023 23:48:22 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pnT6A-00AkY3-1B; Fri, 14 Apr 2023 23:45:03 +0000 Message-ID: <20230414232310.817955867@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1681515896; 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=ayzVJgXuvflj3xjg1mGXZolHpFmSekkZ0AyhKY70H0Q=; b=GY2K7k5oePF4smJsnVlCWc197Gnvm2xpV+H4Y4U8e+jaRt3VB8iE9Bg1axBb2bpO+/I7XE wTG8GN8vNucA/g3rxDLFU6mc1SvUhxpbP0wveuvbhDGNZd++q35ihkBqOmSICTjhquJjYJ gQ/8Bkd6FpRUM+MX/SRhgi0pwhuLuSCrUZwmZ1fPuiU+CEObkKTMFIVqx8V0B6LfZdF2Zy vTSM8z3vPt6+fF/Bmw0aE9UGx+RqDICSvY+n8F5aACJ8IZ8FOG+IfKxylVEweXpqRrNp+K c5k4vI/XDc1rGZAhq8CumldbXaaUQJlgNjb18yycd/3lTwMlhsF9uxtK+pKsOQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1681515896; 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=ayzVJgXuvflj3xjg1mGXZolHpFmSekkZ0AyhKY70H0Q=; b=K/mg+lwQlwHWac81k54xHqleQCPzjnE1varYnMwenALS/XLp9IX7NBh95fkmdnzkG0JM9N NgO+APSKFCAt65CA== 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 , Paul Walmsley , Palmer Dabbelt , linux-riscv@lists.infradead.org, David Woodhouse , 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, Mark Rutland , Sabin Rapan Subject: [patch 26/37] riscv: Switch to hotplug core state synchronization References: <20230414225551.858160935@linutronix.de> MIME-Version: 1.0 Date: Sat, 15 Apr 2023 01:44:55 +0200 (CEST) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230414_164458_590018_382A4F64 X-CRM114-Status: GOOD ( 13.85 ) 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 Switch to the CPU hotplug core state tracking and synchronization mechanim. No functional change intended. Signed-off-by: Thomas Gleixner Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: linux-riscv@lists.infradead.org Acked-by: Palmer Dabbelt --- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/smp.h | 2 +- arch/riscv/kernel/cpu-hotplug.c | 14 +++++++------- 3 files changed, 9 insertions(+), 8 deletions(-) --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -116,6 +116,7 @@ config RISCV select HAVE_RSEQ select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS + select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU select IRQ_DOMAIN select IRQ_FORCED_THREADING select MODULES_USE_ELF_RELA if MODULES --- a/arch/riscv/include/asm/smp.h +++ b/arch/riscv/include/asm/smp.h @@ -64,7 +64,7 @@ asmlinkage void smp_callin(void); #if defined CONFIG_HOTPLUG_CPU int __cpu_disable(void); -void __cpu_die(unsigned int cpu); +static inline void __cpu_die(unsigned int cpu) { } #endif /* CONFIG_HOTPLUG_CPU */ #else --- a/arch/riscv/kernel/cpu-hotplug.c +++ b/arch/riscv/kernel/cpu-hotplug.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -48,17 +49,15 @@ int __cpu_disable(void) return ret; } +#ifdef CONFIG_HOTPLUG_CPU /* - * Called on the thread which is asking for a CPU to be shutdown. + * Called on the thread which is asking for a CPU to be shutdown, if the + * CPU reported dead to the hotplug core. */ -void __cpu_die(unsigned int cpu) +void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) { int ret = 0; - if (!cpu_wait_death(cpu, 5)) { - pr_err("CPU %u: didn't die\n", cpu); - return; - } pr_notice("CPU%u: off\n", cpu); /* Verify from the firmware if the cpu is really stopped*/ @@ -75,9 +74,10 @@ void arch_cpu_idle_dead(void) { idle_task_exit(); - (void)cpu_report_death(); + cpuhp_ap_report_dead(); cpu_ops[smp_processor_id()]->cpu_stop(); /* It should never reach here */ BUG(); } +#endif