From mboxrd@z Thu Jan 1 00:00:00 1970 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 7D2AF5221E4 for ; Wed, 16 Sep 2026 23:13:47 +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=1789600430; cv=none; b=au+W9++O8un9A6Tz4xv9v1AKa4lvyhYR9lDcNPACU4E5NmeWRIEbHlcdGfL+wD17vRmVzxT2TOvcoeEvjwUcCg3tDw1CFE4wV5jqPUBWjcx/SeqquiXiLLbJuHV9ws4roYvrntgu/EdgCQ5J9fnUFCidLWNqVDA+WEkwoD0yApM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789600430; c=relaxed/simple; bh=BvIS2nxcl29o495YCUiPjDgsNeK5VhMEKlCbS6unozM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qa4yg4BbKRDXFK9k+d6saoX3xMTXO00ZPQkUYz6XS/pLX5nBB9PE5ark7XK3L609inqtLOXxSaU7v5Tz9fW7+1GnOqpl4yrsXVH9xXJ6Y8a2fnG/aYhoP/8U6Ebj6Hm6bweBh+xL0lEYTxQBNLTKDDLulNiVwEhS+kVq9P3Ta2U= 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=OVdGDs7d; 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="OVdGDs7d" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1789600428; x=1821136428; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BvIS2nxcl29o495YCUiPjDgsNeK5VhMEKlCbS6unozM=; b=OVdGDs7d806HjJEPar5JNodE8EHUlODqk8yGuj6wZrKkhv2XuMEbNUmY qukh5rEwV3J2rJeE3qdqReX/Nwi9/KDVQepdSYqrm3qt3xyeIaRWYTMdN SlG8YQgO8+XQD5T1Juj/g6+nyt6r7ixVWbRwn0/mlKT3rD0DX7KU/n1jE VZTNg6x3QcjgXLWl3PRFVey+fdN2DKLrBeeVGkkZ2Y4SUSqJX5QWHGiR8 GvtWsgrd7C016OXb2CXmExzv/FFvUuIToozaxPVyy6LbzNKJhB/N8LGs1 UODB8kp+FOaN5Uzxcm+TubiAJL94gsLdaunHpNiOi8Qd2ESCB3XesHOWB A==; X-CSE-ConnectionGUID: rZmEYGEORhC9JUoYzaZRRw== X-CSE-MsgGUID: MaXxzaxyQxK9b/0bLtqH6w== X-IronPort-AV: E=McAfee;i="6800,10657,11905"; a="93861462" X-IronPort-AV: E=Sophos;i="6.27,103,1787036400"; d="scan'208";a="93861462" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by orvoesa106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Sep 2026 16:13:37 -0700 X-CSE-ConnectionGUID: GTU2xvclQDGq9DD4+h+TIw== X-CSE-MsgGUID: Tytxpl+0QyWVfrQGT8DS8A== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,103,1787036400"; d="scan'208";a="277231480" Received: from khuang2-desk.gar.corp.intel.com (HELO agluck-desk3.home.arpa) ([10.124.223.219]) by orviesa004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Sep 2026 16:13:37 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Maciej Wieczor-Retman , Peter Newman , James Morse , Babu Moger , Drew Fustini , Dave Martin , Chen Yu , David E Box , x86@kernel.org Cc: Christoph Hellwig , linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v12 16/25] x86/resctrl: Add PMT registration API for AET enumeration callbacks Date: Wed, 16 Sep 2026 16:13:11 -0700 Message-ID: <20260916231320.14502-17-tony.luck@intel.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260916231320.14502-1-tony.luck@intel.com> References: <20260916231320.14502-1-tony.luck@intel.com> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit resctrl is always built-in; INTEL_PMT_TELEMETRY may be a module. Add, and export, register/unregister functions so the PMT module can supply/clear enumeration callback functions when loaded/unloaded. Suggested-by: Christoph Hellwig Signed-off-by: Tony Luck --- v12: No change --- include/linux/intel_vsec.h | 12 ++++++++++++ arch/x86/kernel/cpu/resctrl/intel_aet.c | 24 ++++++++++++++++++++++++ 2 files changed, 36 insertions(+) diff --git a/include/linux/intel_vsec.h b/include/linux/intel_vsec.h index 843cda8f8644..c04b1d0f3143 100644 --- a/include/linux/intel_vsec.h +++ b/include/linux/intel_vsec.h @@ -257,4 +257,16 @@ static inline void intel_pmt_put_feature_group(struct pmt_feature_group *feature_group) {} #endif +#ifdef CONFIG_X86_CPU_RESCTRL_INTEL_AET +void intel_aet_register_enumeration(struct module *module, + struct pmt_feature_group *(*get)(enum pmt_feature_id id), + void (*put)(struct pmt_feature_group *p)); +void intel_aet_unregister_enumeration(void); +#else +static inline void intel_aet_register_enumeration(struct module *module, + struct pmt_feature_group *(*get)(enum pmt_feature_id id), + void (*put)(struct pmt_feature_group *p)) { } +static inline void intel_aet_unregister_enumeration(void) { } +#endif /* CONFIG_X86_CPU_RESCTRL_INTEL_AET */ + #endif diff --git a/arch/x86/kernel/cpu/resctrl/intel_aet.c b/arch/x86/kernel/cpu/resctrl/intel_aet.c index 4ad6ad78e93e..6c4f0bf3b876 100644 --- a/arch/x86/kernel/cpu/resctrl/intel_aet.c +++ b/arch/x86/kernel/cpu/resctrl/intel_aet.c @@ -17,12 +17,14 @@ #include #include #include +#include #include #include #include #include #include #include +#include #include #include #include @@ -291,6 +293,10 @@ static enum pmt_feature_id lookup_pfid(const char *pfname) return FEATURE_INVALID; } +static struct module *pmt_module; +static struct pmt_feature_group *(*get_feature)(enum pmt_feature_id id); +static void (*put_feature)(struct pmt_feature_group *p); + /* * Request a copy of struct pmt_feature_group for each event group. If there is * one, the returned structure has an array of telemetry_region structures, @@ -325,6 +331,24 @@ bool intel_aet_get_events(void) return ret; } +void intel_aet_register_enumeration(struct module *module, + struct pmt_feature_group *(*get)(enum pmt_feature_id id), + void (*put)(struct pmt_feature_group *p)) +{ + get_feature = get; + put_feature = put; + pmt_module = module; +} +EXPORT_SYMBOL_NS_GPL(intel_aet_register_enumeration, "INTEL_PMT"); + +void intel_aet_unregister_enumeration(void) +{ + pmt_module = NULL; + get_feature = NULL; + put_feature = NULL; +} +EXPORT_SYMBOL_NS_GPL(intel_aet_unregister_enumeration, "INTEL_PMT"); + void __exit intel_aet_exit(void) { struct event_group **peg; -- 2.55.0