From nobody Sun Feb 8 17:36:27 2026 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 1B8251534F1 for ; Wed, 27 Mar 2024 20:04:06 +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=1711569847; cv=none; b=kdlUwpVukUjF1zQobnBjgiJaulJbEp6bpM2O6k+FM7DDO66VEQK1ww1Z9dV1WJMpuW6sPZupdrB1urpCX4crx8f0h9e0DgeXJAld9Zz7qwciEg6/XZYo5S6MJtNWCggP0QhUb/V2jNNyb9S+9CMPO2r6agys2W46nWBT9AqzR5k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711569847; c=relaxed/simple; bh=DQfB7ziQiSVsGqVtUGTeoCLbXrf9m9tIM71X5OZ5E0M=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=D0HfrkyIagEMTi7CjW3rr47/WDRakLs2N8om5eocbOWlKUvWzNu9dbI/I2cNE296MV+sgZ6uWjauFRqJH7amPPK6/Z+2KdYe7UAffwJZGB3UF7DPxXjdyjtjj96DCkig429oYCa4tI/UD65GnECTbU0LvXb4YjRC6MJXtjpC4NQ= 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=nRTmx5BT; 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="nRTmx5BT" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1711569846; x=1743105846; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DQfB7ziQiSVsGqVtUGTeoCLbXrf9m9tIM71X5OZ5E0M=; b=nRTmx5BTrUAquSAxDnQ+oIDYDUDGCHEWzCU0swnjlqGwrnsOAuiFxJaQ ce4pRdcPqHtAopdQ1t9DATw71dbb2FBABXg8Mhgd5JO8KxxaX11/NqUSq qTlejnbf6i1JjrFCzSDHRIvWfhKm3fKX6QsZyhGY9izFt97UK0jL/jXKC BHkgrkNBDdnWpmFuhheUJyOdx0OExTTDtcJ8eYGb+0X1JIA+djfT21EnL e9/7iT8NnpIjrcUxaBlzY+ZN/QgCSFw6wFmBV27WrUYVV3OYr6ZmRkvwP eKDYjQVEgLg50kX5yAky617INoM8WfSryA5jI8l5ynl9CZ6wU9SCLagdq A==; X-CSE-ConnectionGUID: g3syR+rmQr69dzODuOCJzw== X-CSE-MsgGUID: OFBPDUEtSWi0bMwRg8kLrw== X-IronPort-AV: E=McAfee;i="6600,9927,11026"; a="18132991" X-IronPort-AV: E=Sophos;i="6.07,159,1708416000"; d="scan'208";a="18132991" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2024 13:04:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,159,1708416000"; d="scan'208";a="16246122" Received: from agluck-desk3.sc.intel.com ([172.25.222.105]) by orviesa010-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2024 13:04:02 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Maciej Wieczor-Retman , Peter Newman , James Morse , Babu Moger , Drew Fustini Cc: x86@kernel.org, linux-kernel@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH 05/10] x86/resctrl: Add parent/child information to rdt_resource and rdt_domain Date: Wed, 27 Mar 2024 13:03:47 -0700 Message-ID: <20240327200352.236835-6-tony.luck@intel.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240327200352.236835-1-tony.luck@intel.com> References: <20240327200352.236835-1-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" The L3 resource is a "parent" to the SUBL3 resource in that each of the domains in L3 is subdivided into two or more SUBL3 domains. Add parent/child pointers to the rdt_resource structure and a parent domain id number to the rdt_domain structure. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 6 ++++++ arch/x86/kernel/cpu/resctrl/core.c | 12 ++++++++++++ arch/x86/kernel/cpu/resctrl/rdtgroup.c | 4 +++- 3 files changed, 21 insertions(+), 1 deletion(-) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index dea79f6a8122..b7ade7627e08 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -70,6 +70,7 @@ struct resctrl_staged_config { * @cqm_limbo: worker to periodically read CQM h/w counters * @mbm_work_cpu: worker CPU for MBM h/w counters * @cqm_work_cpu: worker CPU for CQM h/w counters + * @parent: parent domain number in parent resource * @plr: pseudo-locked region (if any) associated with domain * @staged_config: parsed configuration to be applied * @mbps_val: When mba_sc is enabled, this holds the array of user @@ -87,6 +88,7 @@ struct rdt_domain { struct delayed_work cqm_limbo; int mbm_work_cpu; int cqm_work_cpu; + int parent; struct pseudo_lock_region *plr; struct resctrl_staged_config staged_config[CDP_NUM_TYPES]; u32 *mbps_val; @@ -173,6 +175,8 @@ enum resctrl_scope { * @format_str: Per resource format string to show domain value * @parse_ctrlval: Per resource function pointer to parse control values * @evt_list: List of monitoring events + * @parent: Parent of this resource + * @child: Child of this resource * @fflags: flags to choose base and info files * @cdp_capable: Is the CDP feature available on this resource */ @@ -194,6 +198,8 @@ struct rdt_resource { struct resctrl_schema *s, struct rdt_domain *d); struct list_head evt_list; + struct rdt_resource *parent; + struct rdt_resource *child; unsigned long fflags; bool cdp_capable; }; diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 2fa04375da8c..1f5d7ee0096e 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -552,6 +552,18 @@ static void domain_add_cpu(int cpu, struct rdt_resourc= e *r) d->id =3D id; cpumask_set_cpu(cpu, &d->cpu_mask); =20 + if (r->parent) { + struct rdt_domain *pd; + + list_for_each_entry(pd, &r->parent->domains, list) + if (cpumask_test_cpu(cpu, &pd->cpu_mask)) + goto found; + WARN_ON_ONCE(1); + return; +found: + d->parent =3D pd->id; + } + rdt_domain_reconfigure_cdp(r); =20 if (r->alloc_capable && domain_setup_ctrlval(r, d)) { diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index a2ebd7e051bb..f2af58a791a4 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1107,9 +1107,11 @@ static int rdt_mon_features_show(struct kernfs_open_= file *of, struct seq_file *seq, void *v) { struct rdt_resource *r =3D of->kn->parent->priv; + struct list_head *evt_list; struct mon_evt *mevt; =20 - list_for_each_entry(mevt, &r->evt_list, list) { + evt_list =3D r->child ? &r->child->evt_list : &r->evt_list; + list_for_each_entry(mevt, evt_list, list) { seq_printf(seq, "%s\n", mevt->name); if (mevt->configurable) seq_printf(seq, "%s_config\n", mevt->name); --=20 2.44.0