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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 B089FC4332F for ; Fri, 10 Nov 2023 02:26:31 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=permerror header.d=wkennington-com.20230601.gappssmtp.com header.i=@wkennington-com.20230601.gappssmtp.com header.a=rsa-sha1 header.s=20230601 header.b=U/nvIUZx; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4SRN462mnqz3bV7 for ; Fri, 10 Nov 2023 13:26:30 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=wkennington-com.20230601.gappssmtp.com header.i=@wkennington-com.20230601.gappssmtp.com header.a=rsa-sha256 header.s=20230601 header.b=U/nvIUZx; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=wkennington.com (client-ip=2607:f8b0:4864:20::430; helo=mail-pf1-x430.google.com; envelope-from=william@wkennington.com; receiver=lists.ozlabs.org) Received: from mail-pf1-x430.google.com (mail-pf1-x430.google.com [IPv6:2607:f8b0:4864:20::430]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4SLflc0R8Nz3cQj for ; Thu, 2 Nov 2023 21:10:50 +1100 (AEDT) Received: by mail-pf1-x430.google.com with SMTP id d2e1a72fcca58-6be0277c05bso776311b3a.0 for ; Thu, 02 Nov 2023 03:10:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wkennington-com.20230601.gappssmtp.com; s=20230601; t=1698919847; x=1699524647; darn=lists.ozlabs.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=odwL1J6AS5nuqoPCF8FI4fUOnDzh+OWjuHaoV8Nap8E=; b=U/nvIUZxqyalZzj/UOFuB778nSumzqDZg3Gq3aGhF76jqhCsVu5aGY4cb2ls0bXVFl mV/daveZkh6RCULScnVp3DKgxHS+AJPaznhZ9LUx5ywseSOAOJ+qSO3mPaVKm/ILO54r 5L3IoLoXCGhdIJOyMQtJk0yUP7Cr5SLronTJreI2GAAaHhl0slmsvEleNIMpEOKses0Q lXuQe2Yl8sRUk6oXV2u1HuM70w8Vf5W61DrBLrtThnXMxBo7DC7W02iVeh6VVYdLlt89 U9bmEEXtF2Sc8C1jc47CeNFcToTQNUviV2nx3aNiMfNsARPeR2lkjYLvKTtx1w7eN9Oo Lu+A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698919847; x=1699524647; 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=odwL1J6AS5nuqoPCF8FI4fUOnDzh+OWjuHaoV8Nap8E=; b=pqmL21x3bDGbYoEs3WUMt4J/Ddqw/bIDCc5oqhybOIrNh9K59+RN1Tg0OvDqRlgeYc 5Y+Q6PUA0gcvDIlK/u0+liszZwe4sWXRdumLvq+n4feAefS3L+DR7BPNpcz873DK6nmW geKVPe5Ytm3NimO+4ZG2TDN5nZ/kXApIRQEFvDTBM44Hg9X5z3L9EHhjlyYt4XnaA9Wz yxVV8uoG7ckEngv2MKNkRzG/ncprAexms8hEFv26pdtcuez+4cdIMkfntxHvAlcC0VBr w+KanqdLjBYf2R9GTDV5gqRnYDBbZ7nXjk4H4323Da1s1K1j4ojXEuFJ4bVW9L2tkW2B o9+w== X-Gm-Message-State: AOJu0YwCBXH88GjyLs6+Eg7mR1o6BVBtpamMHwDum9vTmUw/9f6RFlcP j//3/fKz/Cvd8d2qsy+wpkXNSA== X-Google-Smtp-Source: AGHT+IEf7ZgC902FAtds2SgN5IYeyPxxxWqsIRQdyf4VSs9bXlV7zIMiF/oukOjY8Q/mn5suukmJWQ== X-Received: by 2002:a05:6a20:7488:b0:16b:8132:b547 with SMTP id p8-20020a056a20748800b0016b8132b547mr17207560pzd.4.1698919847221; Thu, 02 Nov 2023 03:10:47 -0700 (PDT) Received: from wak-linux.svl.corp.google.com ([2620:15c:2a3:200:4b75:12e:f4c2:92ac]) by smtp.gmail.com with ESMTPSA id fb27-20020a056a002d9b00b006bdd7cbcf98sm2552127pfb.182.2023.11.02.03.10.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Nov 2023 03:10:46 -0700 (PDT) From: "William A. Kennington III" To: tmaimon77@gmail.com, tali.perry1@gmail.com, avifishman70@gmail.com Subject: [PATCH v2] ARM: npcm: Add CPU hotplug callbacks for kexec support Date: Thu, 2 Nov 2023 03:10:09 -0700 Message-ID: <20231102101009.15104-1-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 X-Mailman-Approved-At: Fri, 10 Nov 2023 13:23:51 +1100 X-BeenThere: openbmc@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development list for OpenBMC List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "William A . Kennington III" , openbmc@lists.ozlabs.org, Brian Ma , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.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 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 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 188BCC4332F for ; Thu, 2 Nov 2023 10:11:26 +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:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=kbufKk+h+Xujf2fpgAwEvSIIh2lk+6ccOG0yMomyv9I=; b=gSC+j84hykJrNT Z0C00+edKT2przlLfTN/lBft9KLK6MxIOXHCzNxN2ttJMJytpdt27O8vM60Ny/B5b4nE0sZW7BYLe zZ36Y9lqcLcz98EmYfdpeVgjotWYpb1cTw/khi7egZg9b+lbiwjURZlzcZfRIZcY3FCZU4f1OxLze Ga6xAXIPfcutU/HZ0hItwUj5GZ2jJ6E/djLnihGvJdBakEUtguh6EKUes0hqEpYqj46B5e7bzxJzg 0MJBz8/viDU9Su/us3BltPQZ3dbT1uNWO1UEPXUQb3I5etkqzivI5dqd5/WSs6nl39Ej6pcfGindd ByYmOMYtK1IzjFHX83YQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qyUf6-0095xD-1F; Thu, 02 Nov 2023 10:10:52 +0000 Received: from mail-pf1-x429.google.com ([2607:f8b0:4864:20::429]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qyUf2-0095wJ-38 for linux-arm-kernel@lists.infradead.org; Thu, 02 Nov 2023 10:10:50 +0000 Received: by mail-pf1-x429.google.com with SMTP id d2e1a72fcca58-6b709048d8eso750412b3a.2 for ; Thu, 02 Nov 2023 03:10:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wkennington-com.20230601.gappssmtp.com; s=20230601; t=1698919847; x=1699524647; darn=lists.infradead.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=odwL1J6AS5nuqoPCF8FI4fUOnDzh+OWjuHaoV8Nap8E=; b=mSbzhusGmDUbxegjisVGfOcels9RKQQWS6FbEpX0K6m1GuMc6h4M9at/pcp/f3XByJ ieD2o3lBs2PXmlqqx3XDeFdbCgJhZsslHyZfEr0aNfE6OoO9yDzsL/AsBVHCQh7JRbHz ioOgDa2fYREBXw8zMH8Yg+9zdoP91GDN0kt+oLIP9K1aGEp1+WtHdsYCrCzgwrExGGQ5 2cwDF2/Eyza7VzqH2Tov6AJM+A9SPZfNUnG1YunMMo1eBW3HlEjj3ZAZZcfRZO5R3lOb kDeQV3mR8SBnT4QilY/CaCA1ESvN7kdKRqWGjlsc2pxRXAwqAUKI3tDhC4GvB2w3aJlJ +/vg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698919847; x=1699524647; 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=odwL1J6AS5nuqoPCF8FI4fUOnDzh+OWjuHaoV8Nap8E=; b=KlKzqPzPdJ7l/DQiS6VvNEM1lACQLpb38ThT5+fqkBRwpvA+vDNoVJ46vXr6X7D+kg bW/aHIKQJcSkVT03bXVGJBwtnRVZDpB12kNO6L6eu5D/R88bXfPfsy9VeJOPXcuAc+wX 5e7QjmeXpoanEMk2dW4QDOo8jBhAg/fhitFakFYx1COTtN/LQtgnsISSM1DpL4iUwQUg REGwwLWRnXSTRtlXjK2k0/ShBgBKLvz/KdUwt7hvPCmID3XTN7uHGfpSVQkf7WIqDWJ0 d6YET0BnVH9Ur46Q0KV7vQDsxf+xFQvDOOXMEBjXkUgsntkQpxqYD+A+HvNGV1UaKRao d8kg== X-Gm-Message-State: AOJu0YwObXn11bxKsL9ITG0gzrU4tXLTNcC6oTe9AY7el2JIQH1G04M1 YlC2Tarv95MhQDatA8XM3GDBJQ== X-Google-Smtp-Source: AGHT+IEf7ZgC902FAtds2SgN5IYeyPxxxWqsIRQdyf4VSs9bXlV7zIMiF/oukOjY8Q/mn5suukmJWQ== X-Received: by 2002:a05:6a20:7488:b0:16b:8132:b547 with SMTP id p8-20020a056a20748800b0016b8132b547mr17207560pzd.4.1698919847221; Thu, 02 Nov 2023 03:10:47 -0700 (PDT) Received: from wak-linux.svl.corp.google.com ([2620:15c:2a3:200:4b75:12e:f4c2:92ac]) by smtp.gmail.com with ESMTPSA id fb27-20020a056a002d9b00b006bdd7cbcf98sm2552127pfb.182.2023.11.02.03.10.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Nov 2023 03:10:46 -0700 (PDT) From: "William A. Kennington III" To: tmaimon77@gmail.com, tali.perry1@gmail.com, avifishman70@gmail.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, Brian Ma , "William A . Kennington III" Subject: [PATCH v2] ARM: npcm: Add CPU hotplug callbacks for kexec support Date: Thu, 2 Nov 2023 03:10:09 -0700 Message-ID: <20231102101009.15104-1-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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231102_031049_225376_2122CDCA X-CRM114-Status: GOOD ( 11.94 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Brian Ma Add callbacks required for kexec to function. The NPCM7xx 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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 ABBF7C4332F for ; Thu, 2 Nov 2023 10:10:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345972AbjKBKKy (ORCPT ); Thu, 2 Nov 2023 06:10:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345941AbjKBKKw (ORCPT ); Thu, 2 Nov 2023 06:10:52 -0400 Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7BCE13D for ; Thu, 2 Nov 2023 03:10:47 -0700 (PDT) Received: by mail-pf1-x42c.google.com with SMTP id d2e1a72fcca58-6c32a20d5dbso444946b3a.1 for ; Thu, 02 Nov 2023 03:10:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=wkennington-com.20230601.gappssmtp.com; s=20230601; t=1698919847; x=1699524647; 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=odwL1J6AS5nuqoPCF8FI4fUOnDzh+OWjuHaoV8Nap8E=; b=jE9ABzcUs4ykxihsWPdjm5DtOVYkw9/QYvx2LskuQnri8o1sgamftAk9kEJZOxrdSq jKFQ/QmvYHIeWA1b8nR/imfhyGT73XG7+UdrCWAinX4UGxbVEeFPnII+gwFtEqbbbvYv bp2rpq/6Cq2NlfZXwXYoqKgeydFTPf3AT2PWNXQXvacjbG07IwdPaCKGCMDfX7x26jLe DzJZ8cV3ozp6zZmPSS2zQkTX5HVGvzXwQTZM2PWIg3NhCusAmzuz7PXzlNrPLGaWCtdW SInc5TWnIzjb2sap4gUo+vFFXfJoQuuyvdl/bglHf1xtZBoM/Euh2fm1b+Rv2AbcMoUA mWvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698919847; x=1699524647; 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=odwL1J6AS5nuqoPCF8FI4fUOnDzh+OWjuHaoV8Nap8E=; b=UwcO1Zwdcv7Sew1UiHOp6dI4Co/N3lkHdamnEpbgUA7iLbBDDEO/i4oCFdyQft8F5W XIhFCzqwh3Y6XSP95ATzalQgL78oM9A+41mlvNJeqP1nsR0FTPZFw8W+dX+xz4lhcwmv gnmXVWdlyIYwgwESk8EfstfTU9qXJHqQVKOmKPLH7wL8fN989y12IETPVrpxR7MAKXKR LlqWekdmmNrUcZUSDdBYAtSkKt+SGojFEh3ZLYRHfrjvF/zIJ6ec51EO/8pBvstS+9h+ QVDIWAPaRUksisufi/mr0Af5IQ5jmcFtne4uWb84+S18ggZ5zwtTv0xVjeebq7JhuyoP 7W9w== X-Gm-Message-State: AOJu0Yxadw77OCGszQNBXFCcjI3h+HBHekVFqca+inBOvv7jV7zYTx6t upaVzmf7o4s9ODdv6jF6qH5WnA== X-Google-Smtp-Source: AGHT+IEf7ZgC902FAtds2SgN5IYeyPxxxWqsIRQdyf4VSs9bXlV7zIMiF/oukOjY8Q/mn5suukmJWQ== X-Received: by 2002:a05:6a20:7488:b0:16b:8132:b547 with SMTP id p8-20020a056a20748800b0016b8132b547mr17207560pzd.4.1698919847221; Thu, 02 Nov 2023 03:10:47 -0700 (PDT) Received: from wak-linux.svl.corp.google.com ([2620:15c:2a3:200:4b75:12e:f4c2:92ac]) by smtp.gmail.com with ESMTPSA id fb27-20020a056a002d9b00b006bdd7cbcf98sm2552127pfb.182.2023.11.02.03.10.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Nov 2023 03:10:46 -0700 (PDT) From: "William A. Kennington III" To: tmaimon77@gmail.com, tali.perry1@gmail.com, avifishman70@gmail.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, Brian Ma , "William A . Kennington III" Subject: [PATCH v2] ARM: npcm: Add CPU hotplug callbacks for kexec support Date: Thu, 2 Nov 2023 03:10:09 -0700 Message-ID: <20231102101009.15104-1-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 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