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{ "id": 2218434, "url": "http://patchwork.ozlabs.org/api/covers/2218434/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/cover/20260401081640.26875-1-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": "<20260401081640.26875-1-fengchengwen@huawei.com>", "list_archive_url": null, "date": "2026-04-01T08:16:32", "name": "[RESEND,v10,0/8] ACPI: Unify CPU UID interface and fix ARM64 TPH steer-tag issue", "submitter": { "id": 92756, "url": "http://patchwork.ozlabs.org/api/people/92756/?format=api", "name": "fengchengwen", "email": "fengchengwen@huawei.com" }, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/cover/20260401081640.26875-1-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/covers/2218434/comments/", "headers": { "Return-Path": "\n <linux-pci+bounces-51654-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=s0jHWYux;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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Wed, 1 Apr 2026 16:16:45 +0800" ], "ARC-Seal": "i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1775031418; cv=none;\n b=myEKSgLdi3nTLPrsYjs4fi886Fa7jnfhMpkLfn8Y7fEYQ6SPtV+UBZo0iUxAW1ypdGTtRqY9Wt1nR5F++pkSdMIS9HhmlP7Y+eyg+FuWSQV7YPPxLLzPpYUonaXeE3TxmOM8gI+36+1vy59ynCzp33m1Lx/pWrtMdfGlwbb13oc=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1775031418; c=relaxed/simple;\n\tbh=mWFuylDN3gumG6Mci9fYRAjdIJ9JzoCKwenkUyx/LSU=;\n\th=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type;\n b=lXG7giernFKSP9yspd+m7DjT7TUzSlQH/l2mOpCY6gcwsdcxoYLG/aS6rAILYWILNsuQgL4HF3xxHGEN90nGaBNpK4MJzG/QBfKdjKQofa3BAgl2MUW4qTFi46ZPC+K8dDSsGTXCRVU3tHDpmjssjUmcLxex0dsL7DRqUiWtDC8=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=quarantine dis=none) header.from=huawei.com;\n spf=pass smtp.mailfrom=huawei.com;\n dkim=pass (1024-bit key) header.d=huawei.com header.i=@huawei.com\n header.b=s0jHWYux; arc=none smtp.client-ip=113.46.200.219", "dkim-signature": "v=1; a=rsa-sha256; d=huawei.com; s=dkim;\n\tc=relaxed/relaxed; q=dns/txt;\n\th=From;\n\tbh=c9AlrYXsxBFF3IzNBDnKrFfgKSQZlOG3wlCt2foyY+Y=;\n\tb=s0jHWYuxfoxkRN+t4KseYGhpk5P2m2+oPxvld1K2wRhg/xq/KJ6rPLjiy3A+eHJcZDd4LECJR\n\thk2c9oJcG9N70ZRCYC/HPCz/7V6gQufIs9IC6ExJohMMFTan9KIJsB7lPAuY/r27HFSh7GQcO9C\n\tuY27gGt24m7NlqDK+Rfdv9c=", "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 0/8] ACPI: Unify CPU UID interface and fix ARM64\n TPH steer-tag issue", "Date": "Wed, 1 Apr 2026 16:16:32 +0800", "Message-ID": "<20260401081640.26875-1-fengchengwen@huawei.com>", "X-Mailer": "git-send-email 2.17.1", "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": "This patchset unifies ACPI Processor UID retrieval across\narm64/loongarch/riscv/x86 via acpi_get_cpu_uid() (with input validation)\nand fixes ARM64 CPU steer-tag retrieval failure in PCI/TPH:\n\n1-4: Add acpi_get_cpu_uid() for arm64/loongarch/riscv/x86 (update\n respective users)\n5: Centralize acpi_get_cpu_uid() declaration in include/linux/acpi.h\n6: Clean up perf/arm_cspmu\n7: Clean up ACPI/PPTT and remove unused get_acpi_id_for_cpu()\n8: Pass ACPI Processor UID to Cache Locality _DSM\n\nThe interface refactor ensures consistent CPU UID retrieval across\narchitectures (no functional changes for valid inputs) and provides the\nunified interface required for the ARM64 TPH fix\n\n---\nChanges in v10-resend:\n- Add Catalin's ack-by for arm64 commit\n- Add CC to x86@kernel.org\n\nChanges in v10:\n- Refine commit header&log according to Punit's and Bjorn's review\n- Split perf/arm_cspmu as a separate commit which address Punit's\n review\n\nChanges in v9:\n- Address Bjorn's review: split commits to each platform so that make\n them easy to review\n\nChanges in v8:\n- Moving arm64's get_cpu_for_acpi_id() to kernel/acpi.c which address\n Jeremy's review\n\nChengwen Feng (8):\n arm64: acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval\n LoongArch: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval\n RISC-V: ACPI: Add acpi_get_cpu_uid() for unified ACPI CPU UID\n retrieval\n x86/acpi: Add acpi_get_cpu_uid() for unified ACPI CPU UID retrieval\n ACPI: Centralize acpi_get_cpu_uid() declaration in\n include/linux/acpi.h\n perf: arm_cspmu: Switch to acpi_get_cpu_uid() from\n get_acpi_id_for_cpu()\n ACPI: PPTT: Use acpi_get_cpu_uid() and remove get_acpi_id_for_cpu()\n PCI/TPH: Pass ACPI Processor UID to Cache Locality _DSM\n\n Documentation/PCI/tph.rst | 4 +--\n arch/arm64/include/asm/acpi.h | 17 +---------\n arch/arm64/kernel/acpi.c | 30 ++++++++++++++++++\n arch/loongarch/include/asm/acpi.h | 5 ---\n arch/loongarch/kernel/acpi.c | 9 ++++++\n arch/riscv/include/asm/acpi.h | 4 ---\n arch/riscv/kernel/acpi.c | 16 ++++++++++\n arch/riscv/kernel/acpi_numa.c | 9 ++++--\n arch/x86/include/asm/cpu.h | 1 -\n arch/x86/include/asm/smp.h | 1 -\n arch/x86/kernel/acpi/boot.c | 20 ++++++++++++\n arch/x86/xen/enlighten_hvm.c | 5 +--\n drivers/acpi/pptt.c | 50 ++++++++++++++++++++++--------\n drivers/acpi/riscv/rhct.c | 7 ++++-\n drivers/pci/tph.c | 16 +++++++---\n drivers/perf/arm_cspmu/arm_cspmu.c | 6 ++--\n include/linux/acpi.h | 11 +++++++\n include/linux/pci-tph.h | 4 +--\n 18 files changed, 158 insertions(+), 57 deletions(-)" }