From nobody Fri Oct 3 14:45:03 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.14]) (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 2FD682522B4 for ; Fri, 29 Aug 2025 19:34:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.14 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756496045; cv=none; b=ajkeZBDM3xSqSWS6NIb58rAv3MsfAQGrb1SSXqJDLCt2wJUBLdPyFgCKLLb1dWWvhKakXPQ/eMgZ1PlRGMXK8T7xjCJqalm8ToDmUawsMFwNCA2AHWGKhFZ3z7pVWO2XyqM2V9pDgmm0H0Lt7PQxGgDITfcstcCTpz8moEzLIao= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756496045; c=relaxed/simple; bh=wFjdFdpytoM9LAz3ca8ApVJW42pX80e23R/C9rIkZpE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UvNJHoHeMnaIJgmCumq0+zSjeSPjQLJkRiVhIUikSJqkfYEMyucCWBVdufLg6+9BBiHAdXiPaShRYIlOqHwTqkXOof8oew1boHtyZ2C/TEossXy8/7yba8vywVQBgTkURUS8Fflvjq0xDsL1JidXcZwDrRRkw5jM09pO2TfqTNQ= 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=Lgc7IKlR; arc=none smtp.client-ip=198.175.65.14 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="Lgc7IKlR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1756496043; x=1788032043; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=wFjdFdpytoM9LAz3ca8ApVJW42pX80e23R/C9rIkZpE=; b=Lgc7IKlRTETeY+TRr91LxjOn2/S/KyFQUHFHNbWy64wMmAvuI5kKvOMZ P+SlJ/6qadVO6KsNQbZhnoZjRLPKs/Ozu4gWrarVnqSgxnQTHqqXN56rC uRX5X8FwOUjcCcv5wpbly/HGl+lbYGGQkbmi/4JIcZYYN34/263a9Tii+ fTD/KjbzDBzylLsKi1bVUYSLkIAI8S4fm21v2mDAtGSKXdwNZWCFmyamx FLwcWHXAd3qxtTFeRrbkim9PBI/VYwmzKR3t5l0ycYwX/avQSo1mR6ZG/ Hu3Z8uJRoNomLNSIG6I9yCYZZ4bzWGKl2LmLZa+x6edeDva5TqoxJwBQC A==; X-CSE-ConnectionGUID: syvBP/cVQhmMSUyQEa4uGQ== X-CSE-MsgGUID: 9xoVUo/cSgume8rvfFTctw== X-IronPort-AV: E=McAfee;i="6800,10657,11531"; a="62625267" X-IronPort-AV: E=Sophos;i="6.17,312,1747724400"; d="scan'208";a="62625267" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Aug 2025 12:33:55 -0700 X-CSE-ConnectionGUID: kXZKCMZoSpWj9Qi4C35PLA== X-CSE-MsgGUID: q0ej7aHqQqaSMxdTg3dvhw== X-ExtLoop1: 1 Received: from ldmartin-desk2.corp.intel.com (HELO agluck-desk3.intel.com) ([10.124.220.202]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Aug 2025 12:33:55 -0700 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 v9 16/31] x86,fs/resctrl: Add and initialize rdt_resource for package scope monitor Date: Fri, 29 Aug 2025 12:33:28 -0700 Message-ID: <20250829193346.31565-17-tony.luck@intel.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250829193346.31565-1-tony.luck@intel.com> References: <20250829193346.31565-1-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 Reviewed-by: Reinette Chatre --- 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 f29a602d1b71..efe4e887c5c9 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, @@ -252,6 +253,7 @@ 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 17ab320b17f1..a7eaf22ecdea 100644 --- a/fs/resctrl/internal.h +++ b/fs/resctrl/internal.h @@ -243,6 +243,8 @@ struct rdtgroup { =20 #define RFTYPE_DEBUG BIT(10) =20 +#define RFTYPE_RES_PERF_PKG BIT(11) + #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 5ff0db08e132..566530c6dbc3 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) @@ -433,6 +441,8 @@ 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 abefdda245dd..1832840ad11c 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -2195,6 +2195,8 @@ 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 2.50.1