From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (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 6F65C20514E for ; Tue, 29 Oct 2024 17:28:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730222923; cv=none; b=aFMLKPuU/dKf/4NL9SeyScExq/WIuKZwVLtr7t3/eJFh7EcqFPB/7Oq9OXSDtyS+aD/avkKLBbQ/nFcgKh316PFXIRmUgTlql+vDyjGe8rV0r14zTECqwB88zXWAHEy1PJ5I3LSXXQDM0djHHtoZSbC6ogi5T2/goTF/bD3SxXA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730222923; c=relaxed/simple; bh=SHRi/W/hccHUHwXfh2MbFeVEffxuPn8jRJHIpiMoqm8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=LwVUlOgKwWNcirFm+yGuZmFN9yGdL+3jRs+r8dWtniVP1EASPu9r2b5Woa1U+xZaqmn3wUKoA3+ohtCEISTyIxT0LY00iAWICC75tcVCgVtM2gDECC61uCfBhZZNHgHfHyjayu6xOWQbreV8Yb2QiuiT9tduCZ+pmZspYJumH/g= 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=IkyaEsUq; arc=none smtp.client-ip=192.198.163.16 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="IkyaEsUq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730222921; x=1761758921; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SHRi/W/hccHUHwXfh2MbFeVEffxuPn8jRJHIpiMoqm8=; b=IkyaEsUqwmJgGyfhAIQPXBsC3FslnP2Hpj3yL976b35+hT6U5L+0rz6K 3XAwSNdY3ckuKbqN3A7/96Fr1KkXKN/a7fV6uv5LbvQ7D9jxedUB87xH2 mbn4qPOd4iLTRG+TxtqAZ1LYj0qjG253dlmHjKzTVyRFa73OQQAPzfAT1 MF+QF8RS4DKPiKuTTuARGNRFDvFacTzDhMpFf1bu7TMn2ZWpi9ix3J4B6 VANzAg+9GWXyKzJXPt4PFcv9KCoPYyZYH7NAGFrAlO9MTQLAPMM58cxzm 2a1frGbIHD6e6ZE/VCpAqONcbENtTmtYwrZm2hEqqSl/kqI32gEY2XreS Q==; X-CSE-ConnectionGUID: mynxg0XDQ6SF17RpbvzU4Q== X-CSE-MsgGUID: wmjUW+tGRsiy3V62QKWGSQ== X-IronPort-AV: E=McAfee;i="6700,10204,11240"; a="17515645" X-IronPort-AV: E=Sophos;i="6.11,241,1725346800"; d="scan'208";a="17515645" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2024 10:28:39 -0700 X-CSE-ConnectionGUID: BOFCIB5QRBKbdxtkvryHQQ== X-CSE-MsgGUID: xYAeSO2AQSKDliCw3GcSrA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,241,1725346800"; d="scan'208";a="81585597" Received: from agluck-desk3.sc.intel.com ([172.25.222.70]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2024 10:28:39 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: James Morse , Jamie Iles , Babu Moger , Randy Dunlap , "Shaopeng Tan (Fujitsu)" , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v8 1/7] x86/resctrl: Prepare for per-ctrl_mon group mba_MBps control Date: Tue, 29 Oct 2024 10:28:26 -0700 Message-ID: <20241029172832.93963-2-tony.luck@intel.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241029172832.93963-1-tony.luck@intel.com> References: <20241029172832.93963-1-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 uses local memory bandwidth event as input to the feedback loop when the mba_MBps mount option is used. This means that this mount option cannot be used on systems that only support monitoring of total bandwidth. Prepare to allow users to choose the input event independently for each ctrl_mon group. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 2 ++ arch/x86/kernel/cpu/resctrl/internal.h | 2 ++ arch/x86/kernel/cpu/resctrl/core.c | 5 +++++ arch/x86/kernel/cpu/resctrl/rdtgroup.c | 6 ++++++ 4 files changed, 15 insertions(+) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index d94abba1c716..fd05b937e2f4 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -49,6 +49,8 @@ enum resctrl_event_id { QOS_L3_MBM_LOCAL_EVENT_ID = 0x03, }; +extern enum resctrl_event_id mba_mbps_default_event; + /** * struct resctrl_staged_config - parsed configuration to be applied * @new_ctrl: new ctrl value to be loaded diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h index 955999aecfca..a6f051fb2e69 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -283,6 +283,7 @@ struct pseudo_lock_region { * monitor only or ctrl_mon group * @mon: mongroup related data * @mode: mode of resource group + * @mba_mbps_event: input event id when mba_sc mode is active * @plr: pseudo-locked region */ struct rdtgroup { @@ -295,6 +296,7 @@ struct rdtgroup { enum rdt_group_type type; struct mongroup mon; enum rdtgrp_mode mode; + enum resctrl_event_id mba_mbps_event; struct pseudo_lock_region *plr; }; diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index b681c2e07dbf..5b55a7ac7013 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -958,6 +958,11 @@ static __init bool get_rdt_mon_resources(void) if (rdt_cpu_has(X86_FEATURE_CQM_MBM_LOCAL)) rdt_mon_features |= (1 << QOS_L3_MBM_LOCAL_EVENT_ID); + if (rdt_mon_features & (1 << QOS_L3_MBM_LOCAL_EVENT_ID)) + mba_mbps_default_event = QOS_L3_MBM_LOCAL_EVENT_ID; + else if (rdt_mon_features & (1 << QOS_L3_MBM_TOTAL_EVENT_ID)) + mba_mbps_default_event = QOS_L3_MBM_TOTAL_EVENT_ID; + if (!rdt_mon_features) return false; diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index d7163b764c62..dbfb9d11f3f8 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -65,6 +65,8 @@ static void rdtgroup_destroy_root(void); struct dentry *debugfs_resctrl; +enum resctrl_event_id mba_mbps_default_event; + static bool resctrl_debug; void rdt_last_cmd_clear(void) @@ -2665,6 +2667,8 @@ static int rdt_get_tree(struct fs_context *fc) if (ret) goto out_schemata_free; + rdtgroup_default.mba_mbps_event = mba_mbps_default_event; + kernfs_activate(rdtgroup_default.kn); ret = rdtgroup_create_info_dir(rdtgroup_default.kn); @@ -3624,6 +3628,8 @@ static int rdtgroup_mkdir_ctrl_mon(struct kernfs_node *parent_kn, } } + rdtgrp->mba_mbps_event = mba_mbps_default_event; + goto out_unlock; out_del_list: -- 2.47.0