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: 13212068 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 31E86C77B77 for ; Fri, 14 Apr 2023 23:48:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231213AbjDNXsn (ORCPT ); Fri, 14 Apr 2023 19:48:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231150AbjDNXsX (ORCPT ); Fri, 14 Apr 2023 19:48:23 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7D85C86AA; Fri, 14 Apr 2023 16:47:05 -0700 (PDT) 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) Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.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