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Kennington III" , openbmc@lists.ozlabs.org, Brian Ma , linux-arm-kernel@lists.ifradead.org, linux-kernel@vger.kernel.org Errors-To: openbmc-bounces+openbmc=archiver.kernel.org@lists.ozlabs.org Sender: "openbmc" From: Brian Ma Add callbacks required for kexec to function. The NPCM7xx/NPCN8xx does not expose controls for powering down CPU cores, so just wait in idle loop. Signed-off-by: Brian Ma Signed-off-by: William A. Kennington III --- arch/arm/mach-npcm/platsmp.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm/mach-npcm/platsmp.c b/arch/arm/mach-npcm/platsmp.c index 41891d3aa124..6cc7b5894f08 100644 --- a/arch/arm/mach-npcm/platsmp.c +++ b/arch/arm/mach-npcm/platsmp.c @@ -69,10 +69,27 @@ static void __init npcm7xx_smp_prepare_cpus(unsigned int max_cpus) iounmap(scu_base); } +#ifdef CONFIG_HOTPLUG_CPU +static void npcm7xx_cpu_die(unsigned int cpu) +{ + while (1) + cpu_do_idle(); +} + +static int npcm7xx_cpu_kill(unsigned int l_cpu) +{ + return 1; +} +#endif + static struct smp_operations npcm7xx_smp_ops __initdata = { .smp_prepare_cpus = npcm7xx_smp_prepare_cpus, .smp_boot_secondary = npcm7xx_smp_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = npcm7xx_cpu_die, + .cpu_kill = npcm7xx_cpu_kill, +#endif }; CPU_METHOD_OF_DECLARE(npcm7xx_smp, "nuvoton,npcm750-smp", &npcm7xx_smp_ops); -- 2.42.0.820.g83a721a137-goog 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64289C4167D for ; Thu, 2 Nov 2023 00:52:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234783AbjKBAwn (ORCPT ); Wed, 1 Nov 2023 20:52:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230395AbjKBAwm (ORCPT ); Wed, 1 Nov 2023 20:52:42 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E9CD4E8 for ; Wed, 1 Nov 2023 17:52:39 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1cc5fa0e4d5so3403625ad.0 for ; Wed, 01 Nov 2023 17:52:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wkennington-com.20230601.gappssmtp.com; s=20230601; t=1698886359; x=1699491159; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=xEH7jgDGNi0IK8LdwBqEJDaZ1nOxkEDv/a4hPy0Cfvs=; b=SMaoJNPFXJIwsGMPPtrBxSj0JH0dRdOa2GBKQnKWzfVRg5PcVZI0HHlU2hIM4AIY2h Wg0InEuQJV3XQe1PnsjtCUdPDB/sY81bMzC/aQfARYe/KiSspahLe8wPq8gT2bXkAItu FChPi8CpZ9FczryOZyiKHh/1Qxg2nPG3IC/fHr4EzTuNsmNY8+J9G/WicZt9r1OS57rZ lDWkvvfFCm5szxjntr6Rrc82OM5m2Lx9kIyLizxxvQdLG2EefotD3tnJxBo8dqeHhzJZ ail1kFd+d8l/HiEoBBIqbwMTTwhhd7bLuJdQUB9XMZPOrsFe/UguSamXSp2Cv+8CTonT 21TA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698886359; x=1699491159; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=xEH7jgDGNi0IK8LdwBqEJDaZ1nOxkEDv/a4hPy0Cfvs=; b=rFVVqOTUElcBK6P1kvbLKEOOJMjtEpdMtaUUvnaQTwLYR5uhx8bA9TviNiJUOPTppZ jWBbaVvcmyJRv16T1w9ZIwfzzilUJK7/vFtU+Wy5+3JtpIS6EqZEUHh/k1ou6vUAgAam 6oQSnaQkMglva1W9vdaHwNjcK98iP3Me1t9Pjh2i7UayyTYwUXQUEJRz+5SwM4tvCS39 DrzjlvFf1sI21xSjWttq9nFT70bOtWsHih6pZhfh39XFOYfnVvdkGw9noVUtYUGbXkgX a5PzZF1EQSN5rODlT7O88eWvM9fyaRhZM/OTpeiWP4junRoEHh04x+Xyx4bTQzwH3BM2 KSzw== X-Gm-Message-State: AOJu0YzLbTi2XJ3J4TG3f1v1j6pPkBrCOA2c7V/q9x658XB1HqxJV/8K J0hGSxom//u1WC4zsE+pwr0mtA== X-Google-Smtp-Source: AGHT+IE+ZdLb3Aw+UkjefJkw08x3IgjX/CtA8o+83Guh4gaPv8UBFUr6Jry4WwmCNb1WOSCraNSQ3g== X-Received: by 2002:a17:902:f688:b0:1cc:53db:f53a with SMTP id l8-20020a170902f68800b001cc53dbf53amr11579358plg.8.1698886359474; Wed, 01 Nov 2023 17:52:39 -0700 (PDT) Received: from wak-linux.svl.corp.google.com ([2620:15c:2a3:200:8eb3:7c85:29f7:efa1]) by smtp.gmail.com with ESMTPSA id ij13-20020a170902ab4d00b001cc29ffcd96sm1888663plb.192.2023.11.01.17.52.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 01 Nov 2023 17:52:38 -0700 (PDT) From: william@wkennington.com To: tmaimon77@gmail.com, tali.perry1@gmail.com, avifishman70@gmail.com Cc: linux-arm-kernel@lists.ifradead.org, linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, Brian Ma , "William A . Kennington III" Subject: [PATCH RESEND] ARM: npcm: Add CPU hotplug callbacks for kexec support Date: Wed, 1 Nov 2023 17:52:27 -0700 Message-ID: <20231102005227.1303733-1-william@wkennington.com> X-Mailer: git-send-email 2.42.0.820.g83a721a137-goog In-Reply-To: <20231102002453.1299195-1-william@wkennington.com> References: <20231102002453.1299195-1-william@wkennington.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Brian Ma Add callbacks required for kexec to function. The NPCM7xx/NPCN8xx does not expose controls for powering down CPU cores, so just wait in idle loop. Signed-off-by: Brian Ma Signed-off-by: William A. Kennington III --- arch/arm/mach-npcm/platsmp.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm/mach-npcm/platsmp.c b/arch/arm/mach-npcm/platsmp.c index 41891d3aa124..6cc7b5894f08 100644 --- a/arch/arm/mach-npcm/platsmp.c +++ b/arch/arm/mach-npcm/platsmp.c @@ -69,10 +69,27 @@ static void __init npcm7xx_smp_prepare_cpus(unsigned int max_cpus) iounmap(scu_base); } +#ifdef CONFIG_HOTPLUG_CPU +static void npcm7xx_cpu_die(unsigned int cpu) +{ + while (1) + cpu_do_idle(); +} + +static int npcm7xx_cpu_kill(unsigned int l_cpu) +{ + return 1; +} +#endif + static struct smp_operations npcm7xx_smp_ops __initdata = { .smp_prepare_cpus = npcm7xx_smp_prepare_cpus, .smp_boot_secondary = npcm7xx_smp_boot_secondary, +#ifdef CONFIG_HOTPLUG_CPU + .cpu_die = npcm7xx_cpu_die, + .cpu_kill = npcm7xx_cpu_kill, +#endif }; CPU_METHOD_OF_DECLARE(npcm7xx_smp, "nuvoton,npcm750-smp", &npcm7xx_smp_ops); -- 2.42.0.820.g83a721a137-goog