From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from canpmsgout05.his.huawei.com (canpmsgout05.his.huawei.com [113.46.200.220]) (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 CEF2B39E185; Wed, 1 Apr 2026 08:16:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=113.46.200.220 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775031417; cv=none; b=C1wadJXAtY0uDiZsF40n2dOZTz/imeIFTqnphw+/nDcX1dtGUFmgGgUCGSvqlF9oJ4zgNHCqTp/JSFjUuWE+AOYSo2poNAIUBcqUxbd13dLV5VedLsjpc1Tes0pJsmWauVuWum9UpV65hvmG0NhspEfj3K2PAF8MU0gvxi348B0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775031417; c=relaxed/simple; bh=fEGzW0HQ9aaEqblExMt3fAmEGfMNM+rKetFSxjUPWu8=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=UD7TorTqeNGS9rKHc1R9qCO9TN3WJVMV6tdgy+Rs3eghRJDocFnOcse3JTPXtAnh1TKCS0mA4zFtiGfcXw8bOytLA9ID8Pnn2it8Kq1CLAcuUUNivZDFQX/vQoKbyg1wedddyKESulxFz+t8rZ3nPKQPNAs9x0vyCTE3f5aNo6o= 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; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b=0iNno9Ks; arc=none smtp.client-ip=113.46.200.220 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 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com header.b="0iNno9Ks" dkim-signature: v=1; a=rsa-sha256; d=huawei.com; s=dkim; c=relaxed/relaxed; q=dns/txt; h=From; bh=BAu9Jx0jggsoB9DdjhBMDzv6GW2fgZQZhQIfabnTV1w=; b=0iNno9KssbzJIwOx46kM6OnZNBBxZqavG7rHHC5bdLxsRgIt4sx/XNjUZTTVDZXEoVFcegx0c Yif2aSgMI7B+vjuMbgqzpMuvUrJW1SQ8yRstGcNtfNLWFUMM/xjzPhZAjZffDLNoeTFLUbEByDb +8fyvzP5gn6CQVDmf4awY48= Received: from mail.maildlp.com (unknown [172.19.163.0]) by canpmsgout05.his.huawei.com (SkyGuard) with ESMTPS id 4flyPC3klwz12LG4; Wed, 1 Apr 2026 16:11:27 +0800 (CST) Received: from kwepemk500009.china.huawei.com (unknown [7.202.194.94]) by mail.maildlp.com (Postfix) with ESMTPS id CEA0F40537; Wed, 1 Apr 2026 16:16:50 +0800 (CST) Received: from localhost.localdomain (10.50.163.32) by kwepemk500009.china.huawei.com (7.202.194.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 1 Apr 2026 16:16:48 +0800 From: Chengwen Feng To: Bjorn Helgaas , Catalin Marinas , Will Deacon , "Rafael J . Wysocki" CC: Jonathan Corbet , WANG Xuerui , Thomas Gleixner , Dave Hansen , "H . Peter Anvin" , Juergen Gross , Boris Ostrovsky , Len Brown , Sunil V L , Mark Rutland , Jonathan Cameron , Kees Cook , Yanteng Si , Sean Christopherson , Kai Huang , Tom Lendacky , Thomas Huth , Thorsten Blum , Kevin Loughlin , Zheyun Shen , Peter Zijlstra , Pawan Gupta , Xin Li , "Ahmed S . Darwish" , Sohil Mehta , Ilkka Koskinen , Robin Murphy , James Clark , Besar Wicaksono , Ma Ke , Wei Huang , Andy Gospodarek , Somnath Kotur , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH RESEND v10 2/8] LoongArch: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval Date: Wed, 1 Apr 2026 16:16:34 +0800 Message-ID: <20260401081640.26875-3-fengchengwen@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20260401081640.26875-1-fengchengwen@huawei.com> References: <20260401081640.26875-1-fengchengwen@huawei.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-ClientProxiedBy: kwepems200001.china.huawei.com (7.221.188.67) To kwepemk500009.china.huawei.com (7.202.194.94) As a step towards unifying the interface for retrieving ACPI CPU UID across architectures, introduce a new function acpi_get_cpu_uid() for loongarch. While at it, add input validation to make the code more robust. Cc: stable@vger.kernel.org Signed-off-by: Chengwen Feng Reviewed-by: Jonathan Cameron --- arch/loongarch/include/asm/acpi.h | 1 + arch/loongarch/kernel/acpi.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/arch/loongarch/include/asm/acpi.h b/arch/loongarch/include/asm/acpi.h index 7376840fa9f7..8bb101b4557e 100644 --- a/arch/loongarch/include/asm/acpi.h +++ b/arch/loongarch/include/asm/acpi.h @@ -44,6 +44,7 @@ static inline u32 get_acpi_id_for_cpu(unsigned int cpu) { return acpi_core_pic[cpu_logical_map(cpu)].processor_id; } +int acpi_get_cpu_uid(unsigned int cpu, u32 *uid); #endif /* !CONFIG_ACPI */ diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c index 1367ca759468..058f0dbe8e8f 100644 --- a/arch/loongarch/kernel/acpi.c +++ b/arch/loongarch/kernel/acpi.c @@ -385,3 +385,12 @@ int acpi_unmap_cpu(int cpu) EXPORT_SYMBOL(acpi_unmap_cpu); #endif /* CONFIG_ACPI_HOTPLUG_CPU */ + +int acpi_get_cpu_uid(unsigned int cpu, u32 *uid) +{ + if (cpu >= nr_cpu_ids) + return -EINVAL; + *uid = acpi_core_pic[cpu_logical_map(cpu)].processor_id; + return 0; +} +EXPORT_SYMBOL_GPL(acpi_get_cpu_uid); -- 2.17.1