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GET /api/patches/2218439/?format=api
{ "id": 2218439, "url": "http://patchwork.ozlabs.org/api/patches/2218439/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260401081640.26875-2-fengchengwen@huawei.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260401081640.26875-2-fengchengwen@huawei.com>", "list_archive_url": null, "date": "2026-04-01T08:16:33", "name": "[RESEND,v10,1/8] arm64: acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5ee1b980376e11efd92c9c588adf26cdd0f926f3", "submitter": { "id": 92756, "url": "http://patchwork.ozlabs.org/api/people/92756/?format=api", "name": "fengchengwen", "email": "fengchengwen@huawei.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260401081640.26875-2-fengchengwen@huawei.com/mbox/", "series": [ { "id": 498292, "url": "http://patchwork.ozlabs.org/api/series/498292/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=498292", "date": "2026-04-01T08:16:32", "name": "ACPI: Unify CPU UID interface and fix ARM64 TPH steer-tag issue", "version": 10, "mbox": "http://patchwork.ozlabs.org/series/498292/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218439/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218439/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-51659-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=huawei.com header.i=@huawei.com header.a=rsa-sha256\n header.s=dkim header.b=i+j26ict;\n\tdkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com\n header.a=rsa-sha256 header.s=dkim header.b=i+j26ict;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; 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arc=none smtp.client-ip=45.249.212.187", "dkim-signature": [ "v=1; a=rsa-sha256; d=huawei.com; s=dkim;\n\tc=relaxed/relaxed; q=dns/txt;\n\th=From;\n\tbh=cX9nX5J0dlT1awVPQ/6cRzsJrYfbjG8pE8PbO0C/Hhc=;\n\tb=i+j26ictNtsg7O/F6lBPFRPqM46wxpGQx6OUUfHHZ8jfyEiP2gCA6kxZgTIcJa4j5pbOBLJLQ\n\tc+HcxUl949mY9sPM4NfmX+Zase+tnrgONPI+R/E8bfr+487HRMp/f+b+3k2YIASwaiRxC/kJzyc\n\tytRMmF8nbgor8UF3Ii+ThkQ=", "v=1; a=rsa-sha256; d=huawei.com; s=dkim;\n\tc=relaxed/relaxed; q=dns/txt;\n\th=From;\n\tbh=cX9nX5J0dlT1awVPQ/6cRzsJrYfbjG8pE8PbO0C/Hhc=;\n\tb=i+j26ictNtsg7O/F6lBPFRPqM46wxpGQx6OUUfHHZ8jfyEiP2gCA6kxZgTIcJa4j5pbOBLJLQ\n\tc+HcxUl949mY9sPM4NfmX+Zase+tnrgONPI+R/E8bfr+487HRMp/f+b+3k2YIASwaiRxC/kJzyc\n\tytRMmF8nbgor8UF3Ii+ThkQ=" ], "From": "Chengwen Feng <fengchengwen@huawei.com>", "To": "Bjorn Helgaas <bhelgaas@google.com>, Catalin Marinas\n\t<catalin.marinas@arm.com>, Will Deacon <will@kernel.org>, \"Rafael J .\n Wysocki\" <rafael@kernel.org>", "CC": "Jonathan Corbet <corbet@lwn.net>, WANG Xuerui <kernel@xen0n.name>, Thomas\n Gleixner <tglx@kernel.org>, Dave Hansen <dave.hansen@linux.intel.com>, \"H .\n Peter Anvin\" <hpa@zytor.com>, Juergen Gross <jgross@suse.com>, Boris\n Ostrovsky <boris.ostrovsky@oracle.com>, Len Brown <lenb@kernel.org>, Sunil V\n L <sunilvl@ventanamicro.com>, Mark Rutland <mark.rutland@arm.com>, Jonathan\n Cameron <jonathan.cameron@huawei.com>, Kees Cook <kees@kernel.org>, Yanteng\n Si <si.yanteng@linux.dev>, Sean Christopherson <seanjc@google.com>, Kai Huang\n\t<kai.huang@intel.com>, Tom Lendacky <thomas.lendacky@amd.com>, Thomas Huth\n\t<thuth@redhat.com>, Thorsten Blum <thorsten.blum@linux.dev>, Kevin Loughlin\n\t<kevinloughlin@google.com>, Zheyun Shen <szy0127@sjtu.edu.cn>, Peter Zijlstra\n\t<peterz@infradead.org>, Pawan Gupta <pawan.kumar.gupta@linux.intel.com>, Xin\n Li <xin@zytor.com>, \"Ahmed S . Darwish\" <darwi@linutronix.de>, Sohil Mehta\n\t<sohil.mehta@intel.com>, Ilkka Koskinen <ilkka@os.amperecomputing.com>, Robin\n Murphy <robin.murphy@arm.com>, James Clark <james.clark@linaro.org>, Besar\n Wicaksono <bwicaksono@nvidia.com>, Ma Ke <make24@iscas.ac.cn>, Wei Huang\n\t<wei.huang2@amd.com>, Andy Gospodarek <andrew.gospodarek@broadcom.com>,\n\tSomnath Kotur <somnath.kotur@broadcom.com>, <punit.agrawal@oss.qualcomm.com>,\n\t<guohanjun@huawei.com>, <suzuki.poulose@arm.com>, <ryan.roberts@arm.com>,\n\t<chenl311@chinatelecom.cn>, <masahiroy@kernel.org>,\n\t<wangyuquan1236@phytium.com.cn>, <anshuman.khandual@arm.com>,\n\t<heinrich.schuchardt@canonical.com>, <Eric.VanTassell@amd.com>,\n\t<wangzhou1@hisilicon.com>, <wanghuiqiang@huawei.com>,\n\t<liuyonglong@huawei.com>, <fengchengwen@huawei.com>,\n\t<linux-pci@vger.kernel.org>, <linux-doc@vger.kernel.org>,\n\t<linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>,\n\t<loongarch@lists.linux.dev>, <linux-riscv@lists.infradead.org>,\n\t<xen-devel@lists.xenproject.org>, <linux-acpi@vger.kernel.org>,\n\t<linux-perf-users@vger.kernel.org>, <stable@vger.kernel.org>,\n\t<x86@kernel.org>", "Subject": "[PATCH RESEND v10 1/8] arm64: acpi: Add acpi_get_cpu_uid() for\n unified ACPI CPU UID retrieval", "Date": "Wed, 1 Apr 2026 16:16:33 +0800", "Message-ID": "<20260401081640.26875-2-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-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Content-Type": "text/plain", "X-ClientProxiedBy": "kwepems200001.china.huawei.com (7.221.188.67) To\n kwepemk500009.china.huawei.com (7.202.194.94)" }, "content": "As a step towards unifying the interface for retrieving ACPI CPU UID\nacross architectures, introduce a new function acpi_get_cpu_uid() for\narm64. While at it, add input validation to make the code more robust.\n\nReimplement get_cpu_for_acpi_id() based on acpi_get_cpu_uid() for\nconsistency, and move its implementation next to the new function for\ncode coherence.\n\nCc: stable@vger.kernel.org\nSigned-off-by: Chengwen Feng <fengchengwen@huawei.com>\nReviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>\nAcked-by: Catalin Marinas <catalin.marinas@arm.com>\n---\n arch/arm64/include/asm/acpi.h | 14 ++------------\n arch/arm64/kernel/acpi.c | 30 ++++++++++++++++++++++++++++++\n 2 files changed, 32 insertions(+), 12 deletions(-)", "diff": "diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h\nindex c07a58b96329..2219a3301e72 100644\n--- a/arch/arm64/include/asm/acpi.h\n+++ b/arch/arm64/include/asm/acpi.h\n@@ -118,18 +118,8 @@ static inline u32 get_acpi_id_for_cpu(unsigned int cpu)\n {\n \treturn\tacpi_cpu_get_madt_gicc(cpu)->uid;\n }\n-\n-static inline int get_cpu_for_acpi_id(u32 uid)\n-{\n-\tint cpu;\n-\n-\tfor (cpu = 0; cpu < nr_cpu_ids; cpu++)\n-\t\tif (acpi_cpu_get_madt_gicc(cpu) &&\n-\t\t uid == get_acpi_id_for_cpu(cpu))\n-\t\t\treturn cpu;\n-\n-\treturn -EINVAL;\n-}\n+int acpi_get_cpu_uid(unsigned int cpu, u32 *uid);\n+int get_cpu_for_acpi_id(u32 uid);\n \n static inline void arch_fix_phys_package_id(int num, u32 slot) { }\n void __init acpi_init_cpus(void);\ndiff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c\nindex af90128cfed5..24b9d934be54 100644\n--- a/arch/arm64/kernel/acpi.c\n+++ b/arch/arm64/kernel/acpi.c\n@@ -458,3 +458,33 @@ int acpi_unmap_cpu(int cpu)\n }\n EXPORT_SYMBOL(acpi_unmap_cpu);\n #endif /* CONFIG_ACPI_HOTPLUG_CPU */\n+\n+int acpi_get_cpu_uid(unsigned int cpu, u32 *uid)\n+{\n+\tstruct acpi_madt_generic_interrupt *gicc;\n+\n+\tif (cpu >= nr_cpu_ids)\n+\t\treturn -EINVAL;\n+\n+\tgicc = acpi_cpu_get_madt_gicc(cpu);\n+\tif (!gicc)\n+\t\treturn -ENODEV;\n+\n+\t*uid = gicc->uid;\n+\treturn 0;\n+}\n+EXPORT_SYMBOL_GPL(acpi_get_cpu_uid);\n+\n+int get_cpu_for_acpi_id(u32 uid)\n+{\n+\tu32 cpu_uid;\n+\tint ret;\n+\n+\tfor (int cpu = 0; cpu < nr_cpu_ids; cpu++) {\n+\t\tret = acpi_get_cpu_uid(cpu, &cpu_uid);\n+\t\tif (ret == 0 && uid == cpu_uid)\n+\t\t\treturn cpu;\n+\t}\n+\n+\treturn -EINVAL;\n+}\n", "prefixes": [ "RESEND", "v10", "1/8" ] }