From nobody Sat Sep 27 21:20:45 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) (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 5047931E8A4 for ; Thu, 25 Sep 2025 20:04:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758830663; cv=none; b=qTS705B+/ptxMxDeBv34EUiRLUmM8IxMtCzdrraD99uvw3X/vdaGL8yNMIaY0lgPuo0jyTSIuWYzXIEsu94LaOTS4+dhae8KYi2nV61BfP9NISP+GajGvkDHw3i+ixqjn2OQQIvaT/kymsLo/uRCydCXKAeC2S5Cu5gylK8de4g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758830663; c=relaxed/simple; bh=NYZq+e/7j/QeJaD8gSC2nHl3bHirqNZYGb8Xy8peETc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I+RMD4DWiZ+X3Mz1H7jxozfDnKLRnH39kBAeKvupicasxi9jyupC9bQUPDyMp4i0dLSesm5rn34pUmttOiBXJen4aEwGZmj8lOiaJ2uiOx65cvbsmPS2KjBDfptfg3IInUSksC6g718md00UEDFsG/Nz2lNQ8jN2mq4XZ9s+Hm0= 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=JKsgED/Y; arc=none smtp.client-ip=198.175.65.21 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="JKsgED/Y" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1758830661; x=1790366661; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=NYZq+e/7j/QeJaD8gSC2nHl3bHirqNZYGb8Xy8peETc=; b=JKsgED/Y358g7yzT6w1jqAQZnWTVWLMNudYh8tQVGQqoEg6jHzbZsKxZ E10VcYjaxl9b0JVZ1yHfjvy8kkJAZqTh0RgCnympvK9HhYETsbsSyYcLn iMhsAnzV2cf5ZMFTicOjGTivc9Mi1zGao6IKP4I+WN+tYSKOi9xRtQyyT xqO74lWHs/Bg21CXVsOA/pKMMv/Qj4J/geJQt27ISeOWJKRh5Uw7SXOGK nBuh/EnwhfEIpdHrmCrOeIfsUJgFcy17y6zAwiuZ+TW+9kMDNTzTVZUCH DJkWOBs0dOMRjjro+DzOFSZDgjDkcSKUs5L8WCwWuYAqFvhtXWukrGKh/ A==; X-CSE-ConnectionGUID: AYtUlQMtRZuRLs3gE+6sWg== X-CSE-MsgGUID: skOryL7LRXeiauROsL0ZxA== X-IronPort-AV: E=McAfee;i="6800,10657,11531"; a="61074314" X-IronPort-AV: E=Sophos;i="6.17,312,1747724400"; d="scan'208";a="61074314" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Sep 2025 13:04:12 -0700 X-CSE-ConnectionGUID: BooRzUWiRWO9uY9wfgrW8w== X-CSE-MsgGUID: UwvtG2ajSxuRbBNBL7v9/w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,293,1751266800"; d="scan'208";a="177003674" Received: from inaky-mobl1.amr.corp.intel.com (HELO agluck-desk3.intel.com) ([10.124.220.206]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Sep 2025 13:04:12 -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 v11 21/31] x86/resctrl: Handle domain creation/deletion for RDT_RESOURCE_PERF_PKG Date: Thu, 25 Sep 2025 13:03:15 -0700 Message-ID: <20250925200328.64155-22-tony.luck@intel.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250925200328.64155-1-tony.luck@intel.com> References: <20250925200328.64155-1-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 has several requirements for domains. There are per-domain structures that hold the 64-bit values of counters, and elements to keep track of the overflow and limbo threads. None of these are needed for the PERF_PKG resource. The hardware counters are wide enough that they do not wrap around for decades. Define a new rdt_perf_pkg_mon_domain structure which just consists of the standard rdt_domain_hdr to keep track of domain id and CPU mask. Support the PERF_PKG resource in the CPU online/offline handlers. Add WARN checks to code that sums domains for Sub-NUMA cluster to confirm the resource ID is RDT_RESOURCE_L3. Signed-off-by: Tony Luck --- arch/x86/kernel/cpu/resctrl/internal.h | 13 +++++++++++ arch/x86/kernel/cpu/resctrl/core.c | 15 +++++++++++++ arch/x86/kernel/cpu/resctrl/intel_aet.c | 29 +++++++++++++++++++++++++ fs/resctrl/ctrlmondata.c | 5 +++++ fs/resctrl/rdtgroup.c | 10 +++++++++ 5 files changed, 72 insertions(+) diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 97616c81682b..b920f54f8736 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -84,6 +84,14 @@ static inline struct rdt_hw_l3_mon_domain *resctrl_to_ar= ch_mon_dom(struct rdt_l3 return container_of(r, struct rdt_hw_l3_mon_domain, d_resctrl); } =20 +/** + * struct rdt_perf_pkg_mon_domain - CPUs sharing an package scoped resctrl= monitor resource + * @hdr: common header for different domain types + */ +struct rdt_perf_pkg_mon_domain { + struct rdt_domain_hdr hdr; +}; + /** * struct msr_param - set a range of MSRs from a domain * @res: The resource to use @@ -222,6 +230,8 @@ bool intel_aet_get_events(void); void __exit intel_aet_exit(void); int intel_aet_read_event(int domid, u32 rmid, enum resctrl_event_id evtid, void *arch_priv, u64 *val); +void intel_aet_mon_domain_setup(int cpu, int id, struct rdt_resource *r, + struct list_head *add_pos); #else static inline bool intel_aet_get_events(void) { return false; } static inline void __exit intel_aet_exit(void) { } @@ -230,6 +240,9 @@ static inline int intel_aet_read_event(int domid, u32 r= mid, enum resctrl_event_i { return -EINVAL; } + +static inline void intel_aet_mon_domain_setup(int cpu, int id, struct rdt_= resource *r, + struct list_head *add_pos) { } #endif =20 #endif /* _ASM_X86_RESCTRL_INTERNAL_H */ diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 588de539a739..5dff83e763a5 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -573,6 +573,10 @@ static void domain_add_cpu_mon(int cpu, struct rdt_res= ource *r) if (!hdr) l3_mon_domain_setup(cpu, id, r, add_pos); break; + case RDT_RESOURCE_PERF_PKG: + if (!hdr) + intel_aet_mon_domain_setup(cpu, id, r, add_pos); + break; default: pr_warn_once("Unknown resource rid=3D%d\n", r->rid); break; @@ -635,6 +639,7 @@ static void domain_remove_cpu_ctrl(int cpu, struct rdt_= resource *r) static void domain_remove_cpu_mon(int cpu, struct rdt_resource *r) { int id =3D get_domain_id_from_scope(cpu, r->mon_scope); + struct rdt_perf_pkg_mon_domain *pkgd; struct rdt_hw_l3_mon_domain *hw_dom; struct rdt_l3_mon_domain *d; struct rdt_domain_hdr *hdr; @@ -670,6 +675,16 @@ static void domain_remove_cpu_mon(int cpu, struct rdt_= resource *r) synchronize_rcu(); l3_mon_domain_free(hw_dom); break; + case RDT_RESOURCE_PERF_PKG: + if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_PERF_P= KG)) + return; + + pkgd =3D container_of(hdr, struct rdt_perf_pkg_mon_domain, hdr); + resctrl_offline_mon_domain(r, hdr); + list_del_rcu(&hdr->list); + synchronize_rcu(); + kfree(pkgd); + break; default: pr_warn_once("Unknown resource rid=3D%d\n", r->rid); break; diff --git a/arch/x86/kernel/cpu/resctrl/intel_aet.c b/arch/x86/kernel/cpu/= resctrl/intel_aet.c index d53211ac6204..dc0d16af66be 100644 --- a/arch/x86/kernel/cpu/resctrl/intel_aet.c +++ b/arch/x86/kernel/cpu/resctrl/intel_aet.c @@ -17,16 +17,21 @@ #include #include #include +#include #include #include +#include #include #include #include #include #include #include +#include +#include #include #include +#include #include #include #include @@ -282,3 +287,27 @@ int intel_aet_read_event(int domid, u32 rmid, enum res= ctrl_event_id eventid, =20 return valid ? 0 : -EINVAL; } + +void intel_aet_mon_domain_setup(int cpu, int id, struct rdt_resource *r, + struct list_head *add_pos) +{ + struct rdt_perf_pkg_mon_domain *d; + int err; + + d =3D kzalloc_node(sizeof(*d), GFP_KERNEL, cpu_to_node(cpu)); + if (!d) + return; + + d->hdr.id =3D id; + d->hdr.type =3D RESCTRL_MON_DOMAIN; + d->hdr.rid =3D r->rid; + cpumask_set_cpu(cpu, &d->hdr.cpu_mask); + list_add_tail_rcu(&d->hdr.list, add_pos); + + err =3D resctrl_online_mon_domain(r, &d->hdr); + if (err) { + list_del_rcu(&d->hdr.list); + synchronize_rcu(); + kfree(d); + } +} diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c index ae43e09fa5e5..f7fbfc4d258d 100644 --- a/fs/resctrl/ctrlmondata.c +++ b/fs/resctrl/ctrlmondata.c @@ -712,6 +712,11 @@ int rdtgroup_mondata_show(struct seq_file *m, void *ar= g) if (md->sum) { struct rdt_l3_mon_domain *d; =20 + if (WARN_ON_ONCE(resid !=3D RDT_RESOURCE_L3)) { + ret =3D -EINVAL; + goto out; + } + /* * This file requires summing across all domains that share * the L3 cache id that was provided in the "domid" field of the diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index cab5cb9e6c93..fa6dfebea6b2 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -3040,6 +3040,9 @@ static struct mon_data *mon_get_kn_priv(enum resctrl_= res_level rid, int domid, =20 lockdep_assert_held(&rdtgroup_mutex); =20 + if (WARN_ON_ONCE(do_sum && rid !=3D RDT_RESOURCE_L3)) + return NULL; + list_for_each_entry(priv, &mon_data_kn_priv_list, list) { if (priv->rid =3D=3D rid && priv->domid =3D=3D domid && priv->sum =3D=3D do_sum && priv->evt =3D=3D mevt) @@ -4227,6 +4230,9 @@ void resctrl_offline_mon_domain(struct rdt_resource *= r, struct rdt_domain_hdr *h if (resctrl_mounted && resctrl_arch_mon_capable()) rmdir_mondata_subdir_allrdtgrp(r, hdr); =20 + if (r->rid !=3D RDT_RESOURCE_L3) + goto out_unlock; + if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) goto out_unlock; =20 @@ -4327,6 +4333,9 @@ int resctrl_online_mon_domain(struct rdt_resource *r,= struct rdt_domain_hdr *hdr =20 mutex_lock(&rdtgroup_mutex); =20 + if (r->rid !=3D RDT_RESOURCE_L3) + goto mkdir; + if (!domain_header_is_valid(hdr, RESCTRL_MON_DOMAIN, RDT_RESOURCE_L3)) goto out_unlock; =20 @@ -4344,6 +4353,7 @@ int resctrl_online_mon_domain(struct rdt_resource *r,= struct rdt_domain_hdr *hdr if (resctrl_is_mon_event_enabled(QOS_L3_OCCUP_EVENT_ID)) INIT_DELAYED_WORK(&d->cqm_limbo, cqm_handle_limbo); =20 +mkdir: err =3D 0; /* * If the filesystem is not mounted then only the default resource group --=20 2.51.0