From patchwork Wed May 29 13:34:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jonathan Cameron X-Patchwork-Id: 13678884 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 9447514AA0; Wed, 29 May 2024 13:38:26 +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=1716989907; cv=none; b=AIlWDXIf1+SfeDgMuk6YbW0Fv9kzl8Y9ClP9akU5pzbkCep72YyWsbbEyOOCkS7+BG/0Fg2Dcoc6fvT4UW90gWQVqco0bqhVvaBvOeERlYUpbnbcjOugFlH4v2NnoR6fIp888S5wSmPObIApV4XuwPMw7SEDwZdXSbwBkQ6aR6A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716989907; c=relaxed/simple; bh=yx6wFWgL+4ZV/IlKvfT0XGMVimYLKMlnFu30z0Q8X98=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=MC6MfVSna+9eyF+AVUM4KFWumnbS5RmzF74+UOAvaeQaqj82efdMNqx2Em5B7hKdhFqhH/lZjVTM3QUmW5JvesNd/l69jKXl/xewteb95cLnJmZr50lZpEdUUDe3cpq83GVJADBlcJvQoOKL9p7at3NRvd1DD5NFPb2m+ajx8Tk= 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 4Vq9RR0qVbz67PFb; Wed, 29 May 2024 21:37:23 +0800 (CST) Received: from lhrpeml500005.china.huawei.com (unknown [7.191.163.240]) by mail.maildlp.com (Postfix) with ESMTPS id CD609140A78; Wed, 29 May 2024 21:38:23 +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 15.1.2507.39; Wed, 29 May 2024 14:38:23 +0100 From: Jonathan Cameron To: Marc Zyngier , Will Deacon , Catalin Marinas , , , , , CC: Mark Rutland , Thomas Gleixner , Peter Zijlstra , , , Russell King , "Rafael J . Wysocki" , Miguel Luis , James Morse , Salil Mehta , Jean-Philippe Brucker , Hanjun Guo , Gavin Shan , Ingo Molnar , Borislav Petkov , Dave Hansen , , , Subject: [PATCH v10 07/19] ACPI: processor: Add acpi_get_processor_handle() helper Date: Wed, 29 May 2024 14:34:34 +0100 Message-ID: <20240529133446.28446-8-Jonathan.Cameron@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240529133446.28446-1-Jonathan.Cameron@huawei.com> References: <20240529133446.28446-1-Jonathan.Cameron@huawei.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml100001.china.huawei.com (7.191.160.183) To lhrpeml500005.china.huawei.com (7.191.163.240) If CONFIG_ACPI_PROCESSOR provide a helper to retrieve the acpi_handle for a given CPU allowing access to methods in DSDT. Tested-by: Miguel Luis Reviewed-by: Gavin Shan Acked-by: Rafael J. Wysocki Signed-off-by: Jonathan Cameron --- drivers/acpi/acpi_processor.c | 11 +++++++++++ include/linux/acpi.h | 7 +++++++ 2 files changed, 18 insertions(+) diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index 0bc0419adf6b..56592462d2fb 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -35,6 +35,17 @@ EXPORT_PER_CPU_SYMBOL(processors); struct acpi_processor_errata errata __read_mostly; EXPORT_SYMBOL_GPL(errata); +acpi_handle acpi_get_processor_handle(int cpu) +{ + struct acpi_processor *pr; + + pr = per_cpu(processors, cpu); + if (pr) + return pr->handle; + + return NULL; +} + static int acpi_processor_errata_piix4(struct pci_dev *dev) { u8 value1 = 0; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 28c3fb2bef0d..fd45bfab66b8 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -304,6 +304,8 @@ int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int acpi_unmap_cpu(int cpu); #endif /* CONFIG_ACPI_HOTPLUG_CPU */ +acpi_handle acpi_get_processor_handle(int cpu); + #ifdef CONFIG_ACPI_HOTPLUG_IOAPIC int acpi_get_ioapic_id(acpi_handle handle, u32 gsi_base, u64 *phys_addr); #endif @@ -1076,6 +1078,11 @@ static inline bool acpi_sleep_state_supported(u8 sleep_state) return false; } +static inline acpi_handle acpi_get_processor_handle(int cpu) +{ + return NULL; +} + #endif /* !CONFIG_ACPI */ extern void arch_post_acpi_subsys_init(void);