From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CEAAA1419A0; Fri, 12 Apr 2024 14:38:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712932733; cv=none; b=BQYfand1V40Ec6qan2vM9Np5HQjVZZF4Oi06UKIsaravEZadpwfBuOttSF/45mGV/YPh2qHG5BxWhoLeWD5qat/AMJo6mhq9jGXW3uEy9zxiJZBA3POHCtFMpJpbYWU3LrlYO7YkLy3p1iVAvGe48G4NHFfEdF5pEql3MbmmwmA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712932733; c=relaxed/simple; bh=H2o2WbtZFiKrVbuwOeSpKPIKhDSMpWMr/HAJrb5dAes=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=NpSsHnpb5zN54L9POuTDtQLnMzPYQoqDAKLXKiIcT0P0yWGXBdQFrXuSsTydc6T7u+TIxgEBLjzvWIUIJ/jTVtOBFSgM/0NxjX7GIcig+3wI/+F2WLn1cToy21Sbwfur6cvITlMGpoYMRDYNuosGRAhu64iz3XlI/MiEjLWw8DE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4VGJwR0J92z6K90N; Fri, 12 Apr 2024 22:33:59 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id 6BCF21402CD; Fri, 12 Apr 2024 22:38:49 +0800 (CST) Received: from SecurePC-101-06.china.huawei.com (10.122.247.231) by lhrpeml500005.china.huawei.com (7.191.163.240) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Fri, 12 Apr 2024 15:38:48 +0100 From: Jonathan Cameron To: , , , , , , , , Russell King , "Rafael J . Wysocki" , Miguel Luis , James Morse , Salil Mehta , Jean-Philippe Brucker , Catalin Marinas , Will Deacon CC: , , Subject: [PATCH v5 03/18] ACPI: processor: Register deferred CPUs from acpi_processor_get_info() Date: Fri, 12 Apr 2024 15:37:04 +0100 Message-ID: <20240412143719.11398-4-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240412143719.11398-1-Jonathan.Cameron@huawei.com> References: <20240412143719.11398-1-Jonathan.Cameron@huawei.com> Precedence: bulk X-Mailing-List: linux-arch@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: lhrpeml500006.china.huawei.com (7.191.161.198) To lhrpeml500005.china.huawei.com (7.191.163.240) From: James Morse The arm64 specific arch_register_cpu() call may defer CPU registration until the ACPI interpreter is available and the _STA method can be evaluated. If this occurs, then a second attempt is made in acpi_processor_get_info(). Note that the arm64 specific call has not yet been added so for now this will never be successfully called. Systems can still be booted with 'acpi=off', or not include an ACPI description at all as in these cases arch_register_cpu() will not have deferred registration when first called. This moves the CPU register logic back to a subsys_initcall(), while the memory nodes will have been registered earlier. Note this is where the call was prior to the cleanup series so there should be no side effects of moving it back again for this specific case. [PATCH 00/21] Initial cleanups for vCPU HP. https://lore.kernel.org/all/ZVyz%2FVe5pPu8AWoA@shell.armlinux.org.uk/ e.g. 5b95f94c3b9f ("x86/topology: Switch over to GENERIC_CPU_DEVICES") Signed-off-by: James Morse Reviewed-by: Gavin Shan Tested-by: Miguel Luis Tested-by: Vishnu Pajjuri Tested-by: Jianyong Wu Signed-off-by: Russell King (Oracle) Co-developed-by: Jonathan Cameron Signed-off-by: Joanthan Cameron --- v5: Update commit message to make it clear this is moving the init back to where it was until very recently. No longer change the condition in the earlier registration point as that will be handled by the arm64 registration routine deferring until called again here. --- drivers/acpi/acpi_processor.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 93e029403d05..c78398cdd060 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -317,6 +317,18 @@ static int acpi_processor_get_info(struct acpi_device *device) c = &per_cpu(cpu_devices, pr->id); ACPI_COMPANION_SET(&c->dev, device); + /* + * Register CPUs that are present. get_cpu_device() is used to skip + * duplicate CPU descriptions from firmware. + */ + if (!invalid_logical_cpuid(pr->id) && cpu_present(pr->id) && + !get_cpu_device(pr->id)) { + int ret = arch_register_cpu(pr->id); + + if (ret) + return ret; + } + /* * Extra Processor objects may be enumerated on MP systems with * less than the max # of CPUs. They should be ignored _iff -- 2.39.2