From nobody Sun Feb 8 20:32:35 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92836EB64DC for ; Wed, 21 Jun 2023 17:40:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231138AbjFURkp (ORCPT ); Wed, 21 Jun 2023 13:40:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43676 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229653AbjFURkj (ORCPT ); Wed, 21 Jun 2023 13:40:39 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8673F1; Wed, 21 Jun 2023 10:40:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687369238; x=1718905238; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=7ao2OThthz21P6Yl50SPghVSsGnyGwhkun9NS+QMgvU=; b=ANkiNRMzouKpLxbSJrf3w+Hf1y2uTlxYAYLTRvsPEpBqXM6onco9brRD ityR/ZNjirh0xetRRrJPfpUjaM3TlRWoBdTV+8/iYOhga87REeojDYN9m YGyg51+JGRWbD2oyRM7hfZ/CO8Dalxny6Wbvv9JeIWBgbZHs3dIh/1xIg QnauBqAtpbpJabBKnWR7k3LtYYD1KBMMelbSMVZ5LmrIq5r6VzcVNLSlx y70YzCRdMx5Ys4XOJQFINMSvVsAuD8qy++7hQDQbTkVBKTiOJKN9n5A7v BfcIC8/Z5wHYKOQBYLiIiUmvajdKv3OA5Ls1Z1Vexsv9jUc4rf612okSD w==; X-IronPort-AV: E=McAfee;i="6600,9927,10748"; a="359120503" X-IronPort-AV: E=Sophos;i="6.00,261,1681196400"; d="scan'208";a="359120503" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2023 10:40:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10748"; a="779921558" X-IronPort-AV: E=Sophos;i="6.00,261,1681196400"; d="scan'208";a="779921558" Received: from agluck-desk3.sc.intel.com ([172.25.222.74]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2023 10:40:15 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v2 1/7] x86/resctrl: Refactor in preparation for node-scoped resources Date: Wed, 21 Jun 2023 10:40:00 -0700 Message-Id: <20230621174006.42533-2-tony.luck@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230621174006.42533-1-tony.luck@intel.com> References: <20230621174006.42533-1-tony.luck@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Sub-NUMA cluster systems provide monitoring resources at the NUMA node scope instead of the L3 cache scope. Rename the cache_level field in struct rdt_resource to the more generic "scope" and add symbolic names and a helper function. No functional change. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 4 ++-- arch/x86/kernel/cpu/resctrl/internal.h | 5 +++++ arch/x86/kernel/cpu/resctrl/core.c | 17 +++++++++++------ arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 2 +- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 2 +- 5 files changed, 20 insertions(+), 10 deletions(-) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 8334eeacfec5..25051daa6655 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -150,7 +150,7 @@ struct resctrl_schema; * @alloc_capable: Is allocation available on this machine * @mon_capable: Is monitor feature available on this machine * @num_rmid: Number of RMIDs available - * @cache_level: Which cache level defines scope of this resource + * @scope: Scope of this resource (cache level or NUMA node) * @cache: Cache allocation related data * @membw: If the component has bandwidth controls, their properties. * @domains: All domains for this resource @@ -168,7 +168,7 @@ struct rdt_resource { bool alloc_capable; bool mon_capable; int num_rmid; - int cache_level; + int scope; struct resctrl_cache cache; struct resctrl_membw membw; struct list_head domains; diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 85ceaf9a31ac..8275b8a74f7e 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -440,6 +440,11 @@ enum resctrl_res_level { RDT_NUM_RESOURCES, }; =20 +enum resctrl_scope { + SCOPE_L2_CACHE =3D 2, + SCOPE_L3_CACHE =3D 3 +}; + static inline struct rdt_resource *resctrl_inc(struct rdt_resource *res) { struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(res); diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 030d3b409768..6571514752f3 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -65,7 +65,7 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_L3, .name =3D "L3", - .cache_level =3D 3, + .scope =3D SCOPE_L3_CACHE, .domains =3D domain_init(RDT_RESOURCE_L3), .parse_ctrlval =3D parse_cbm, .format_str =3D "%d=3D%0*x", @@ -79,7 +79,7 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_L2, .name =3D "L2", - .cache_level =3D 2, + .scope =3D SCOPE_L2_CACHE, .domains =3D domain_init(RDT_RESOURCE_L2), .parse_ctrlval =3D parse_cbm, .format_str =3D "%d=3D%0*x", @@ -93,7 +93,7 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_MBA, .name =3D "MB", - .cache_level =3D 3, + .scope =3D SCOPE_L3_CACHE, .domains =3D domain_init(RDT_RESOURCE_MBA), .parse_ctrlval =3D parse_bw, .format_str =3D "%d=3D%*u", @@ -105,7 +105,7 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_SMBA, .name =3D "SMBA", - .cache_level =3D 3, + .scope =3D 3, .domains =3D domain_init(RDT_RESOURCE_SMBA), .parse_ctrlval =3D parse_bw, .format_str =3D "%d=3D%*u", @@ -487,6 +487,11 @@ static int arch_domain_mbm_alloc(u32 num_rmid, struct = rdt_hw_domain *hw_dom) return 0; } =20 +static int get_domain_id(int cpu, enum resctrl_scope scope) +{ + return get_cpu_cacheinfo_id(cpu, scope); +} + /* * domain_add_cpu - Add a cpu to a resource's domain list. * @@ -502,7 +507,7 @@ static int arch_domain_mbm_alloc(u32 num_rmid, struct r= dt_hw_domain *hw_dom) */ static void domain_add_cpu(int cpu, struct rdt_resource *r) { - int id =3D get_cpu_cacheinfo_id(cpu, r->cache_level); + int id =3D get_domain_id(cpu, r->scope); struct list_head *add_pos =3D NULL; struct rdt_hw_domain *hw_dom; struct rdt_domain *d; @@ -552,7 +557,7 @@ static void domain_add_cpu(int cpu, struct rdt_resource= *r) =20 static void domain_remove_cpu(int cpu, struct rdt_resource *r) { - int id =3D get_cpu_cacheinfo_id(cpu, r->cache_level); + int id =3D get_domain_id(cpu, r->scope); struct rdt_hw_domain *hw_dom; struct rdt_domain *d; =20 diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cp= u/resctrl/pseudo_lock.c index 458cb7419502..42f124ffb968 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c +++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c @@ -297,7 +297,7 @@ static int pseudo_lock_region_init(struct pseudo_lock_r= egion *plr) plr->size =3D rdtgroup_cbm_to_size(plr->s->res, plr->d, plr->cbm); =20 for (i =3D 0; i < ci->num_leaves; i++) { - if (ci->info_list[i].level =3D=3D plr->s->res->cache_level) { + if (ci->info_list[i].level =3D=3D plr->s->res->scope) { plr->line_size =3D ci->info_list[i].coherency_line_size; return 0; } diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index 725344048f85..418658f0a9ad 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1348,7 +1348,7 @@ unsigned int rdtgroup_cbm_to_size(struct rdt_resource= *r, num_b =3D bitmap_weight(&cbm, r->cache.cbm_len); ci =3D get_cpu_cacheinfo(cpumask_any(&d->cpu_mask)); for (i =3D 0; i < ci->num_leaves; i++) { - if (ci->info_list[i].level =3D=3D r->cache_level) { + if (ci->info_list[i].level =3D=3D r->scope) { size =3D ci->info_list[i].size / r->cache.cbm_len * num_b; break; } --=20 2.40.1