From nobody Tue Dec 2 00:46:21 2025 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.11]) (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 582D8321445 for ; Mon, 24 Nov 2025 18:54:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764010498; cv=none; b=ANWCkgqRTxBAFmfqIgbS1bLHKJru2d+Dhx/5ORQafwM+t4ZDhOzHpOUP0tTRHkPETAPMJWPfRKMWdsusInB37p/j4Hvn/2otqAPjhoD/EC4apt6PTrghdIbbhAq9jF8G+J+rHlV5NhifgiHaepTcNaps9RLJ0ubEBbbY9ohj68A= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764010498; c=relaxed/simple; bh=hyL2/X8OODb/MAa6mAq8coFobmArLr4dQvg/AGa1bOs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WpXt7qWsW88fjYK9Mtu3RN54CKc/PHdRby5j0UFskDT1ITL251ijDgwH1R4cjDk8koRBDocUZp6x7atm/KbNtFfZxCA8/rhshg3bZGbS2Lp2/Oflfy7ihp7o9jmNFvZIawjyEMGNi6RWvUwE2kAfDj9uSY57TOwHwtNc7Kd1YwA= 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=AP6b1lCw; arc=none smtp.client-ip=192.198.163.11 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="AP6b1lCw" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1764010495; x=1795546495; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=hyL2/X8OODb/MAa6mAq8coFobmArLr4dQvg/AGa1bOs=; b=AP6b1lCwIhj2dNrLDzAOmYeJqeFKeI9LSf91h8hJhJEt+nG6kWdmQ3Yz 6Eravp73Sp5xf2nyxKj4sGyuBUNT6EezOnWVTWJ2NO0MiNobKtmlqfYFg gMe10EoDej7WjjJX383ZC2Egas8uVrt5v1rACfeVAmh++P0hoYsNaL0zO k3oOsgWFjWtUt7taqtFna4TXJmd+1PKLwhtr10z3HGAk2YGbiIA0wpaho hcc6hHGKia2Y1HtNzCTTrWQiODH9rTHMNMFIr5qQGZcsLmI5XllYt+WAS gBnzBDTaLeEG7rr+yLd1GvsTImMIp51CTn6FANMmFLftW+dvZEOCSWgJz Q==; X-CSE-ConnectionGUID: pSzNwezeQueKSkeNXtoGMA== X-CSE-MsgGUID: aTddgtQuRxyDHfdERrHcgA== X-IronPort-AV: E=McAfee;i="6800,10657,11623"; a="76636654" X-IronPort-AV: E=Sophos;i="6.20,223,1758610800"; d="scan'208";a="76636654" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2025 10:54:26 -0800 X-CSE-ConnectionGUID: 9xxc5uxuRIyLkD67glSt0w== X-CSE-MsgGUID: 6tfZIdutQd6/sVtt7ri/Kw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,223,1758610800"; d="scan'208";a="192224987" Received: from rfrazer-mobl3.amr.corp.intel.com (HELO agluck-desk3.home.arpa) ([10.124.222.153]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2025 10:54:26 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Maciej Wieczor-Retman , Peter Newman , James Morse , Babu Moger , Drew Fustini , Dave Martin , Chen Yu Cc: x86@kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v14 14/32] x86,fs/resctrl: Add and initialize rdt_resource for package scope monitor Date: Mon, 24 Nov 2025 10:53:51 -0800 Message-ID: <20251124185412.24155-15-tony.luck@intel.com> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251124185412.24155-1-tony.luck@intel.com> References: <20251124185412.24155-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a new PERF_PKG resource and introduce package level scope for monitoring telemetry events so that CPU hot plug notifiers can build domains at the package granularity. Use the physical package ID available via topology_physical_package_id() to identify the monitoring domains with package level scope. This enables user space to use: /sys/devices/system/cpu/cpuX/topology/physical_package_id to identify the monitoring domain a CPU is associated with. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 2 ++ fs/resctrl/internal.h | 2 ++ arch/x86/kernel/cpu/resctrl/core.c | 10 ++++++++++ fs/resctrl/rdtgroup.c | 2 ++ 4 files changed, 16 insertions(+) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index dc148b7feb71..2a3613f27274 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -53,6 +53,7 @@ enum resctrl_res_level { RDT_RESOURCE_L2, RDT_RESOURCE_MBA, RDT_RESOURCE_SMBA, + RDT_RESOURCE_PERF_PKG, =20 /* Must be the last */ RDT_NUM_RESOURCES, @@ -270,6 +271,7 @@ enum resctrl_scope { RESCTRL_L2_CACHE =3D 2, RESCTRL_L3_CACHE =3D 3, RESCTRL_L3_NODE, + RESCTRL_PACKAGE, }; =20 /** diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h index 14e5a9ed1fbd..0110d1175398 100644 --- a/fs/resctrl/internal.h +++ b/fs/resctrl/internal.h @@ -255,6 +255,8 @@ struct rdtgroup { =20 #define RFTYPE_ASSIGN_CONFIG BIT(11) =20 +#define RFTYPE_RES_PERF_PKG BIT(12) + #define RFTYPE_CTRL_INFO (RFTYPE_INFO | RFTYPE_CTRL) =20 #define RFTYPE_MON_INFO (RFTYPE_INFO | RFTYPE_MON) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 2dd48b59ba9b..986b1303efb9 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -100,6 +100,14 @@ struct rdt_hw_resource rdt_resources_all[RDT_NUM_RESOU= RCES] =3D { .schema_fmt =3D RESCTRL_SCHEMA_RANGE, }, }, + [RDT_RESOURCE_PERF_PKG] =3D + { + .r_resctrl =3D { + .name =3D "PERF_PKG", + .mon_scope =3D RESCTRL_PACKAGE, + .mon_domains =3D mon_domain_init(RDT_RESOURCE_PERF_PKG), + }, + }, }; =20 u32 resctrl_arch_system_num_rmid_idx(void) @@ -440,6 +448,8 @@ static int get_domain_id_from_scope(int cpu, enum resct= rl_scope scope) return get_cpu_cacheinfo_id(cpu, scope); case RESCTRL_L3_NODE: return cpu_to_node(cpu); + case RESCTRL_PACKAGE: + return topology_physical_package_id(cpu); default: break; } diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index b20d104ea0c9..4952ba6b8609 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -2395,6 +2395,8 @@ static unsigned long fflags_from_resource(struct rdt_= resource *r) case RDT_RESOURCE_MBA: case RDT_RESOURCE_SMBA: return RFTYPE_RES_MB; + case RDT_RESOURCE_PERF_PKG: + return RFTYPE_RES_PERF_PKG; } =20 return WARN_ON_ONCE(1); --=20 2.51.1