From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (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 87365272E53 for ; Wed, 1 Jul 2026 13:55:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782914115; cv=none; b=TDXfPxaKNuJ0PsckgW3csnE3PUYsx2hIQ1z6L6TsdFUAbFboTULHWmtmuzmzoFUsyCu42DHtxDgQAwlup3CLMlvZhXFOY+v1FP9Es+4hgvKr/oKj8hAOFGwQ0zsvq/b4C4HrYlQkR+YP3inTJI5QvRBtisXaZXEZ6Vy6KKctoxg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782914115; c=relaxed/simple; bh=IIhQ3X/0aRBhJMHP8g3cyRi71KB0q/QJEkUNf68I1GA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WkgqLvxehJeWT6XJeRlC3EUkZk4GJz/kH4XMY+z0+pfO6TUjK70YPdLWYbellpPMuU1ynrs+7LbzvxrN3waecxqUL7yJm81XGqMEIMxBsZ3NXXAPmP4EbL82c3SHLbLdN7q+UsE5Qwowhyl4xz22id/VamqqDXwddJoRb026Vz8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=b3Usg5nU; arc=none smtp.client-ip=198.175.65.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="b3Usg5nU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1782914115; x=1814450115; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=IIhQ3X/0aRBhJMHP8g3cyRi71KB0q/QJEkUNf68I1GA=; b=b3Usg5nUVns25z007DJWLWXWDMjFpKlWD8wuHAEfkAkNRfMXSoj6tQFZ pzWXlQUi5Q1iQUhnfDwAozVv0QyDEsHT21dwHrqd3r4GBIW9GliqavEK6 3JPTLKy8Z3IrlqbBq06SjyyVtWuaoAatuBiCzGHwpbJc/3T3gO4LcfbNG lJ6BfY6xYpKvycZf/pef8+C1nvWfzxnN4oWzcXDwA/EgI+jL+6X38Zo/S MrgsW9GliWRdToGdZxcIUjcVrl7CB2oyhp0RZuGfOcBtJ9rmzv8P1yz6N FqAqfZk5q/iSmKckcapyFRO68DPVcmOTAfALy5VGd5l+hFqTAtrXyLCfL w==; X-CSE-ConnectionGUID: CvPE6tG1SJe505j/FTVnCA== X-CSE-MsgGUID: AY7LQ40LTbKIsuBScUIRKg== X-IronPort-AV: E=McAfee;i="6800,10657,11833"; a="95149640" X-IronPort-AV: E=Sophos;i="6.25,141,1779174000"; d="scan'208";a="95149640" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Jul 2026 06:55:14 -0700 X-CSE-ConnectionGUID: RvBZVj39ShGKkWOzXiyySA== X-CSE-MsgGUID: UbDQlb2mSNu4/bdiqXpjNA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.25,141,1779174000"; d="scan'208";a="246213601" Received: from chenyu-dev.sh.intel.com ([10.239.62.107]) by fmviesa009.fm.intel.com with ESMTP; 01 Jul 2026 06:55:09 -0700 From: Chen Yu To: tony.luck@intel.com, reinette.chatre@intel.com Cc: x86@kernel.org, linux-kernel@vger.kernel.org, tglx@kernel.org, bp@alien8.de, mingo@redhat.com, dave.hansen@linux.intel.com, hpa@zytor.com, fenghuay@nvidia.com, babu.moger@amd.com, anil.keshavamurthy@broadcom.com, chen.yu@linux.dev, Chen Yu , Hongyu Ning Subject: [PATCH v5 02/10] x86/topology: Export topo_lookup_cpuid() for resctrl use Date: Wed, 1 Jul 2026 21:45:15 +0800 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Make topo_lookup_cpuid() accessible outside of topology.c and add its declaration to asm/apic.h. This is needed by Enhanced RDT (ERDT) to resolve x2APIC IDs from ACPI tables to logical CPU numbers. No functional change expected. Tested-by: Hongyu Ning Signed-off-by: Chen Yu --- v4->v5: New patch. --- arch/x86/include/asm/apic.h | 1 + arch/x86/kernel/cpu/topology.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h index 9cd493d467d4..bb84651b14bd 100644 --- a/arch/x86/include/asm/apic.h +++ b/arch/x86/include/asm/apic.h @@ -54,6 +54,7 @@ static inline void x86_32_probe_apic(void) { } #endif extern u32 cpuid_to_apicid[]; +int topo_lookup_cpuid(u32 apic_id); #define CPU_ACPIID_INVALID U32_MAX diff --git a/arch/x86/kernel/cpu/topology.c b/arch/x86/kernel/cpu/topology.c index 4913b64ec592..bcee70fb9277 100644 --- a/arch/x86/kernel/cpu/topology.c +++ b/arch/x86/kernel/cpu/topology.c @@ -92,7 +92,7 @@ static inline u32 topo_apicid(u32 apicid, enum x86_topology_domains dom) return apicid & (UINT_MAX << x86_topo_system.dom_shifts[dom - 1]); } -static int topo_lookup_cpuid(u32 apic_id) +int topo_lookup_cpuid(u32 apic_id) { int i; -- 2.45.2