From nobody Sat Feb 7 21:08:21 2026 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 BDB5515E5B7; Wed, 28 Feb 2024 19:37:21 +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=1709149044; cv=none; b=CYJK04rWt0kk1HAQAYbIbBb/KK7gPIJnOoS2RavBGrRH4YVXMRRw3mBYPoLvZHVycyQ+f4PHnYk3o/ojLUXdZEJo02RKFke3KrBiWMFjLrpNoYgY87xn5DHR2jiMlXHAsbnWA3DN1WCynkSDe6JAsy1SdzDMGdAdt4lu6O9n5As= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709149044; c=relaxed/simple; bh=L/pg4CiWEYz6FTclmAejqHMZJ11EFYRRFvhxmp0Hm3I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BmSvt9/yGsSs6bUkRKzmKB3g8elkDQc7g35mXandrguMQJbJoqhHgBVMg/j6SHmlnJiehyI1bQjud2q1vdp0yK6P6nLVPOia1v7JAb6Ie2staaZ5Haa6VwxUxb63igBzz4Ije7v5ngfVe4ZWlB/6j51yb9o4ehaQ37/q5Ac+qB4= 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=jCusx9/F; 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="jCusx9/F" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709149042; x=1740685042; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=L/pg4CiWEYz6FTclmAejqHMZJ11EFYRRFvhxmp0Hm3I=; b=jCusx9/Fkd27jVgEbzOA1E0w/FACDD+pLZXBIlJO87xGMcZx04zj2uUx NGbxwejnH3T6JrhjzyshdqQIDysmx6+KZGQieXqwRVfb24nXDP105h5Vb qAIw205iXelu+gd5ps3pZCd/TiY1kXDTHJy2XwMOGz8zhn8i4mRbXEBj+ l3+paCsFYnqTN7vTi85x4cZEuKhdPI37WiMOGOdzCQsP4jTREgiyZL+q/ RVwJzyqesBIrEEdkOj4PMZoWrnDQlstAcbuH6Fu5pFPctAWJDq9t7duoN DzNuZb7YELazYeDYcxVs9N5MczARPhUi5gddlKnXfH/5fkKQytI+6QJvq Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10998"; a="3495495" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="3495495" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2024 11:37:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="7485381" 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; 28 Feb 2024 11:37:18 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , Drew Fustini , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v15 1/8] x86/resctrl: Prepare for new domain scope Date: Wed, 28 Feb 2024 11:36:56 -0800 Message-ID: <20240228193717.8170-3-tony.luck@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240228112935.8087-tony.luck@intel.com> References: <20240228112215.8044-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" Resctrl resources operate on subsets of CPUs in the system with the defining attribute of each subset being an instance of a particular level of cache. E.g. all CPUs sharing an L3 cache would be part of the same domain. In preparation for features that are scoped at the NUMA node level change the code from explicit references to "cache_level" to a more generic scope. At this point the only options for this scope are groups of CPUs that share an L2 cache or L3 cache. Clean up the error handling when looking up domains. Report invalid id's before calling rdt_find_domain() in preparation for better messages when scope can be other than cache scope. This means that rdt_find_domain() will never return an error. So remove checks for error from the callsites. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 9 +++-- arch/x86/kernel/cpu/resctrl/core.c | 44 +++++++++++++++++------ arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 2 +- arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 6 +++- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 5 ++- 5 files changed, 50 insertions(+), 16 deletions(-) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index a365f67131ec..ed693bfe474d 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -150,13 +150,18 @@ struct resctrl_membw { struct rdt_parse_data; struct resctrl_schema; =20 +enum resctrl_scope { + RESCTRL_L2_CACHE =3D 2, + RESCTRL_L3_CACHE =3D 3, +}; + /** * struct rdt_resource - attributes of a resctrl resource * @rid: The index of the resource * @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: Cache allocation related data * @membw: If the component has bandwidth controls, their properties. * @domains: RCU list of all domains for this resource @@ -174,7 +179,7 @@ struct rdt_resource { bool alloc_capable; bool mon_capable; int num_rmid; - int cache_level; + enum resctrl_scope scope; struct resctrl_cache cache; struct resctrl_membw membw; struct list_head domains; diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 7751eea19fd2..13b5461c3cb0 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -68,7 +68,7 @@ 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 RESCTRL_L3_CACHE, .domains =3D domain_init(RDT_RESOURCE_L3), .parse_ctrlval =3D parse_cbm, .format_str =3D "%d=3D%0*x", @@ -82,7 +82,7 @@ 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 RESCTRL_L2_CACHE, .domains =3D domain_init(RDT_RESOURCE_L2), .parse_ctrlval =3D parse_cbm, .format_str =3D "%d=3D%0*x", @@ -96,7 +96,7 @@ 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 RESCTRL_L3_CACHE, .domains =3D domain_init(RDT_RESOURCE_MBA), .parse_ctrlval =3D parse_bw, .format_str =3D "%d=3D%*u", @@ -108,7 +108,7 @@ 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 RESCTRL_L3_CACHE, .domains =3D domain_init(RDT_RESOURCE_SMBA), .parse_ctrlval =3D parse_bw, .format_str =3D "%d=3D%*u", @@ -392,9 +392,6 @@ struct rdt_domain *rdt_find_domain(struct rdt_resource = *r, int id, struct rdt_domain *d; struct list_head *l; =20 - if (id < 0) - return ERR_PTR(-ENODEV); - list_for_each(l, &r->domains) { d =3D list_entry(l, struct rdt_domain, list); /* When id is found, return its domain. */ @@ -484,6 +481,19 @@ static int arch_domain_mbm_alloc(u32 num_rmid, struct = rdt_hw_domain *hw_dom) return 0; } =20 +static int get_domain_id_from_scope(int cpu, enum resctrl_scope scope) +{ + switch (scope) { + case RESCTRL_L2_CACHE: + case RESCTRL_L3_CACHE: + return get_cpu_cacheinfo_id(cpu, scope); + default: + break; + } + + return -EINVAL; +} + /* * domain_add_cpu - Add a cpu to a resource's domain list. * @@ -499,7 +509,7 @@ 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_from_scope(cpu, r->scope); struct list_head *add_pos =3D NULL; struct rdt_hw_domain *hw_dom; struct rdt_domain *d; @@ -507,6 +517,12 @@ static void domain_add_cpu(int cpu, struct rdt_resourc= e *r) =20 lockdep_assert_held(&domain_list_lock); =20 + if (id < 0) { + pr_warn_once("Can't find domain id for CPU:%d scope:%d for resource %s\n= ", + cpu, r->scope, r->name); + return; + } + d =3D rdt_find_domain(r, id, &add_pos); if (IS_ERR(d)) { pr_warn("Couldn't find cache id for CPU %d\n", cpu); @@ -552,15 +568,21 @@ static void domain_add_cpu(int cpu, struct rdt_resour= ce *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_from_scope(cpu, r->scope); struct rdt_hw_domain *hw_dom; struct rdt_domain *d; =20 lockdep_assert_held(&domain_list_lock); =20 + if (id < 0) { + pr_warn_once("Can't find domain id for CPU:%d scope:%d for resource %s\n= ", + cpu, r->scope, r->name); + return; + } + d =3D rdt_find_domain(r, id, NULL); - if (IS_ERR_OR_NULL(d)) { - pr_warn("Couldn't find cache id for CPU %d\n", cpu); + if (!d) { + pr_warn("Couldn't find domain with id=3D%d for CPU %d\n", id, cpu); return; } hw_dom =3D resctrl_to_arch_dom(d); diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cp= u/resctrl/ctrlmondata.c index 7471f6b747b6..4b60835f6170 100644 --- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c +++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c @@ -579,7 +579,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg) =20 r =3D &rdt_resources_all[resid].r_resctrl; d =3D rdt_find_domain(r, domid, NULL); - if (IS_ERR_OR_NULL(d)) { + if (!d) { ret =3D -ENOENT; goto out; } diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cp= u/resctrl/pseudo_lock.c index 884b88e25141..0013b1b39c17 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c +++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c @@ -292,10 +292,14 @@ static void pseudo_lock_region_clear(struct pseudo_lo= ck_region *plr) */ static int pseudo_lock_region_init(struct pseudo_lock_region *plr) { + enum resctrl_scope scope =3D plr->s->res->scope; struct cpu_cacheinfo *ci; int ret; int i; =20 + if (WARN_ON_ONCE(scope !=3D RESCTRL_L2_CACHE && scope !=3D RESCTRL_L3_CAC= HE)) + return -ENODEV; + /* Pick the first cpu we find that is associated with the cache. */ plr->cpu =3D cpumask_first(&plr->d->cpu_mask); =20 @@ -311,7 +315,7 @@ 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 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 da4f13db4161..5cdaf08a97ad 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1454,10 +1454,13 @@ unsigned int rdtgroup_cbm_to_size(struct rdt_resour= ce *r, unsigned int size =3D 0; int num_b, i; =20 + if (WARN_ON_ONCE(r->scope !=3D RESCTRL_L2_CACHE && r->scope !=3D RESCTRL_= L3_CACHE)) + return size; + 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 2.43.0 From nobody Sat Feb 7 21:08:21 2026 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 167CB15E5D1; 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a="3495511" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="3495511" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2024 11:37:19 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="7485386" 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; 28 Feb 2024 11:37:18 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , Drew Fustini , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v15 2/8] x86/resctrl: Prepare to split rdt_domain structure Date: Wed, 28 Feb 2024 11:36:57 -0800 Message-ID: <20240228193717.8170-4-tony.luck@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240228112935.8087-tony.luck@intel.com> References: <20240228112215.8044-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 rdt_domain structure is used for both control and monitor features. It is about to be split into separate structures for these two usages because the scope for control and monitoring features for a resource will be different for future resources. To allow for common code that scans a list of domains looking for a specific domain id, move all the common fields ("list", "id", "cpu_mask") into their own structure within the rdt_domain structure. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 16 ++++-- arch/x86/kernel/cpu/resctrl/core.c | 26 +++++----- arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 24 ++++----- arch/x86/kernel/cpu/resctrl/monitor.c | 12 ++--- arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 14 +++--- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 60 +++++++++++------------ 6 files changed, 80 insertions(+), 72 deletions(-) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index ed693bfe474d..f63fcf17a3bc 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -59,10 +59,20 @@ struct resctrl_staged_config { }; =20 /** - * struct rdt_domain - group of CPUs sharing a resctrl resource + * struct rdt_domain_hdr - common header for different domain types * @list: all instances of this resource * @id: unique id for this instance * @cpu_mask: which CPUs share this resource + */ +struct rdt_domain_hdr { + struct list_head list; + int id; + struct cpumask cpu_mask; +}; + +/** + * struct rdt_domain - group of CPUs sharing a resctrl resource + * @hdr: common header for different domain types * @rmid_busy_llc: bitmap of which limbo RMIDs are above threshold * @mbm_total: saved state for MBM total bandwidth * @mbm_local: saved state for MBM local bandwidth @@ -77,9 +87,7 @@ struct resctrl_staged_config { * by closid */ struct rdt_domain { - struct list_head list; - int id; - struct cpumask cpu_mask; + struct rdt_domain_hdr hdr; unsigned long *rmid_busy_llc; struct mbm_state *mbm_total; struct mbm_state *mbm_local; diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 13b5461c3cb0..e7f8ab271d86 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -355,9 +355,9 @@ struct rdt_domain *get_domain_from_cpu(int cpu, struct = rdt_resource *r) =20 lockdep_assert_cpus_held(); =20 - list_for_each_entry(d, &r->domains, list) { + list_for_each_entry(d, &r->domains, hdr.list) { /* Find the domain that contains this CPU */ - if (cpumask_test_cpu(cpu, &d->cpu_mask)) + if (cpumask_test_cpu(cpu, &d->hdr.cpu_mask)) return d; } =20 @@ -393,12 +393,12 @@ struct rdt_domain *rdt_find_domain(struct rdt_resourc= e *r, int id, struct list_head *l; =20 list_for_each(l, &r->domains) { - d =3D list_entry(l, struct rdt_domain, list); + d =3D list_entry(l, struct rdt_domain, hdr.list); /* When id is found, return its domain. */ - if (id =3D=3D d->id) + if (id =3D=3D d->hdr.id) return d; /* Stop searching when finding id's position in sorted list. */ - if (id < d->id) + if (id < d->hdr.id) break; } =20 @@ -530,7 +530,7 @@ static void domain_add_cpu(int cpu, struct rdt_resource= *r) } =20 if (d) { - cpumask_set_cpu(cpu, &d->cpu_mask); + cpumask_set_cpu(cpu, &d->hdr.cpu_mask); if (r->cache.arch_has_per_cpu_cfg) rdt_domain_reconfigure_cdp(r); return; @@ -541,8 +541,8 @@ static void domain_add_cpu(int cpu, struct rdt_resource= *r) return; =20 d =3D &hw_dom->d_resctrl; - d->id =3D id; - cpumask_set_cpu(cpu, &d->cpu_mask); + d->hdr.id =3D id; + cpumask_set_cpu(cpu, &d->hdr.cpu_mask); =20 rdt_domain_reconfigure_cdp(r); =20 @@ -556,11 +556,11 @@ static void domain_add_cpu(int cpu, struct rdt_resour= ce *r) return; } =20 - list_add_tail_rcu(&d->list, add_pos); + list_add_tail_rcu(&d->hdr.list, add_pos); =20 err =3D resctrl_online_domain(r, d); if (err) { - list_del_rcu(&d->list); + list_del_rcu(&d->hdr.list); synchronize_rcu(); domain_free(hw_dom); } @@ -587,10 +587,10 @@ static void domain_remove_cpu(int cpu, struct rdt_res= ource *r) } hw_dom =3D resctrl_to_arch_dom(d); =20 - cpumask_clear_cpu(cpu, &d->cpu_mask); - if (cpumask_empty(&d->cpu_mask)) { + cpumask_clear_cpu(cpu, &d->hdr.cpu_mask); + if (cpumask_empty(&d->hdr.cpu_mask)) { resctrl_offline_domain(r, d); - list_del_rcu(&d->list); + list_del_rcu(&d->hdr.list); synchronize_rcu(); =20 /* diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cp= u/resctrl/ctrlmondata.c index 4b60835f6170..f49a96b81346 100644 --- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c +++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c @@ -69,7 +69,7 @@ int parse_bw(struct rdt_parse_data *data, struct resctrl_= schema *s, =20 cfg =3D &d->staged_config[s->conf_type]; if (cfg->have_new_ctrl) { - rdt_last_cmd_printf("Duplicate domain %d\n", d->id); + rdt_last_cmd_printf("Duplicate domain %d\n", d->hdr.id); return -EINVAL; } =20 @@ -148,7 +148,7 @@ int parse_cbm(struct rdt_parse_data *data, struct resct= rl_schema *s, =20 cfg =3D &d->staged_config[s->conf_type]; if (cfg->have_new_ctrl) { - rdt_last_cmd_printf("Duplicate domain %d\n", d->id); + rdt_last_cmd_printf("Duplicate domain %d\n", d->hdr.id); return -EINVAL; } =20 @@ -231,8 +231,8 @@ static int parse_line(char *line, struct resctrl_schema= *s, return -EINVAL; } dom =3D strim(dom); - list_for_each_entry(d, &r->domains, list) { - if (d->id =3D=3D dom_id) { + list_for_each_entry(d, &r->domains, hdr.list) { + if (d->hdr.id =3D=3D dom_id) { data.buf =3D dom; data.rdtgrp =3D rdtgrp; if (r->parse_ctrlval(&data, s, d)) @@ -280,7 +280,7 @@ int resctrl_arch_update_one(struct rdt_resource *r, str= uct rdt_domain *d, u32 idx =3D get_config_index(closid, t); struct msr_param msr_param; =20 - if (!cpumask_test_cpu(smp_processor_id(), &d->cpu_mask)) + if (!cpumask_test_cpu(smp_processor_id(), &d->hdr.cpu_mask)) return -EINVAL; =20 hw_dom->ctrl_val[idx] =3D cfg_val; @@ -307,7 +307,7 @@ int resctrl_arch_update_domains(struct rdt_resource *r,= u32 closid) /* Walking r->domains, ensure it can't race with cpuhp */ lockdep_assert_cpus_held(); =20 - list_for_each_entry(d, &r->domains, list) { + list_for_each_entry(d, &r->domains, hdr.list) { hw_dom =3D resctrl_to_arch_dom(d); msr_param.res =3D NULL; msr_param.dom =3D d; @@ -320,7 +320,7 @@ int resctrl_arch_update_domains(struct rdt_resource *r,= u32 closid) if (cfg->new_ctrl =3D=3D hw_dom->ctrl_val[idx]) continue; hw_dom->ctrl_val[idx] =3D cfg->new_ctrl; - cpu =3D cpumask_any(&d->cpu_mask); + cpu =3D cpumask_any(&d->hdr.cpu_mask); =20 if (!msr_param.res) { msr_param.low =3D idx; @@ -452,7 +452,7 @@ static void show_doms(struct seq_file *s, struct resctr= l_schema *schema, int clo lockdep_assert_cpus_held(); =20 seq_printf(s, "%*s:", max_name_width, schema->name); - list_for_each_entry(dom, &r->domains, list) { + list_for_each_entry(dom, &r->domains, hdr.list) { if (sep) seq_puts(s, ";"); =20 @@ -462,7 +462,7 @@ static void show_doms(struct seq_file *s, struct resctr= l_schema *schema, int clo ctrl_val =3D resctrl_arch_get_config(r, dom, closid, schema->conf_type); =20 - seq_printf(s, r->format_str, dom->id, max_data_width, + seq_printf(s, r->format_str, dom->hdr.id, max_data_width, ctrl_val); sep =3D true; } @@ -491,7 +491,7 @@ int rdtgroup_schemata_show(struct kernfs_open_file *of, } else { seq_printf(s, "%s:%d=3D%x\n", rdtgrp->plr->s->res->name, - rdtgrp->plr->d->id, + rdtgrp->plr->d->hdr.id, rdtgrp->plr->cbm); } } else { @@ -539,7 +539,7 @@ void mon_event_read(struct rmid_read *rr, struct rdt_re= source *r, return; } =20 - cpu =3D cpumask_any_housekeeping(&d->cpu_mask, RESCTRL_PICK_ANY_CPU); + cpu =3D cpumask_any_housekeeping(&d->hdr.cpu_mask, RESCTRL_PICK_ANY_CPU); =20 /* * cpumask_any_housekeeping() prefers housekeeping CPUs, but @@ -548,7 +548,7 @@ void mon_event_read(struct rmid_read *rr, struct rdt_re= source *r, * counters on some platforms if its called in IRQ context. */ if (tick_nohz_full_cpu(cpu)) - smp_call_function_any(&d->cpu_mask, mon_event_count, rr, 1); + smp_call_function_any(&d->hdr.cpu_mask, mon_event_count, rr, 1); else smp_call_on_cpu(cpu, smp_mon_event_count, rr, false); =20 diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/re= sctrl/monitor.c index c34a35ec0f03..54f7688ee447 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -280,7 +280,7 @@ int resctrl_arch_rmid_read(struct rdt_resource *r, stru= ct rdt_domain *d, =20 resctrl_arch_rmid_read_context_check(); =20 - if (!cpumask_test_cpu(smp_processor_id(), &d->cpu_mask)) + if (!cpumask_test_cpu(smp_processor_id(), &d->hdr.cpu_mask)) return -EINVAL; =20 ret =3D __rmid_read(rmid, eventid, &msr_val); @@ -479,7 +479,7 @@ static void add_rmid_to_limbo(struct rmid_entry *entry) idx =3D resctrl_arch_rmid_idx_encode(entry->closid, entry->rmid); =20 entry->busy =3D 0; - list_for_each_entry(d, &r->domains, list) { + list_for_each_entry(d, &r->domains, hdr.list) { /* * For the first limbo RMID in the domain, * setup up the limbo worker. @@ -790,7 +790,7 @@ void cqm_handle_limbo(struct work_struct *work) __check_limbo(d, false); =20 if (has_busy_rmid(d)) { - d->cqm_work_cpu =3D cpumask_any_housekeeping(&d->cpu_mask, + d->cqm_work_cpu =3D cpumask_any_housekeeping(&d->hdr.cpu_mask, RESCTRL_PICK_ANY_CPU); schedule_delayed_work_on(d->cqm_work_cpu, &d->cqm_limbo, delay); @@ -814,7 +814,7 @@ void cqm_setup_limbo_handler(struct rdt_domain *dom, un= signed long delay_ms, unsigned long delay =3D msecs_to_jiffies(delay_ms); int cpu; =20 - cpu =3D cpumask_any_housekeeping(&dom->cpu_mask, exclude_cpu); + cpu =3D cpumask_any_housekeeping(&dom->hdr.cpu_mask, exclude_cpu); dom->cqm_work_cpu =3D cpu; =20 if (cpu < nr_cpu_ids) @@ -857,7 +857,7 @@ void mbm_handle_overflow(struct work_struct *work) * Re-check for housekeeping CPUs. This allows the overflow handler to * move off a nohz_full CPU quickly. */ - d->mbm_work_cpu =3D cpumask_any_housekeeping(&d->cpu_mask, + d->mbm_work_cpu =3D cpumask_any_housekeeping(&d->hdr.cpu_mask, RESCTRL_PICK_ANY_CPU); schedule_delayed_work_on(d->mbm_work_cpu, &d->mbm_over, delay); =20 @@ -886,7 +886,7 @@ void mbm_setup_overflow_handler(struct rdt_domain *dom,= unsigned long delay_ms, */ if (!resctrl_mounted || !resctrl_arch_mon_capable()) return; - cpu =3D cpumask_any_housekeeping(&dom->cpu_mask, exclude_cpu); + cpu =3D cpumask_any_housekeeping(&dom->hdr.cpu_mask, exclude_cpu); dom->mbm_work_cpu =3D cpu; =20 if (cpu < nr_cpu_ids) diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cp= u/resctrl/pseudo_lock.c index 0013b1b39c17..52e6935e4c55 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c +++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c @@ -221,7 +221,7 @@ static int pseudo_lock_cstates_constrain(struct pseudo_= lock_region *plr) int cpu; int ret; =20 - for_each_cpu(cpu, &plr->d->cpu_mask) { + for_each_cpu(cpu, &plr->d->hdr.cpu_mask) { pm_req =3D kzalloc(sizeof(*pm_req), GFP_KERNEL); if (!pm_req) { rdt_last_cmd_puts("Failure to allocate memory for PM QoS\n"); @@ -301,7 +301,7 @@ static int pseudo_lock_region_init(struct pseudo_lock_r= egion *plr) return -ENODEV; =20 /* Pick the first cpu we find that is associated with the cache. */ - plr->cpu =3D cpumask_first(&plr->d->cpu_mask); + plr->cpu =3D cpumask_first(&plr->d->hdr.cpu_mask); =20 if (!cpu_online(plr->cpu)) { rdt_last_cmd_printf("CPU %u associated with cache not online\n", @@ -859,10 +859,10 @@ bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_d= omain *d) * associated with them. */ for_each_alloc_capable_rdt_resource(r) { - list_for_each_entry(d_i, &r->domains, list) { + list_for_each_entry(d_i, &r->domains, hdr.list) { if (d_i->plr) cpumask_or(cpu_with_psl, cpu_with_psl, - &d_i->cpu_mask); + &d_i->hdr.cpu_mask); } } =20 @@ -870,7 +870,7 @@ bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_dom= ain *d) * Next test if new pseudo-locked region would intersect with * existing region. */ - if (cpumask_intersects(&d->cpu_mask, cpu_with_psl)) + if (cpumask_intersects(&d->hdr.cpu_mask, cpu_with_psl)) ret =3D true; =20 free_cpumask_var(cpu_with_psl); @@ -1202,7 +1202,7 @@ static int pseudo_lock_measure_cycles(struct rdtgroup= *rdtgrp, int sel) } =20 plr->thread_done =3D 0; - cpu =3D cpumask_first(&plr->d->cpu_mask); + cpu =3D cpumask_first(&plr->d->hdr.cpu_mask); if (!cpu_online(cpu)) { ret =3D -ENODEV; goto out; @@ -1532,7 +1532,7 @@ static int pseudo_lock_dev_mmap(struct file *filp, st= ruct vm_area_struct *vma) * may be scheduled elsewhere and invalidate entries in the * pseudo-locked region. */ - if (!cpumask_subset(current->cpus_ptr, &plr->d->cpu_mask)) { + if (!cpumask_subset(current->cpus_ptr, &plr->d->hdr.cpu_mask)) { mutex_unlock(&rdtgroup_mutex); return -EINVAL; } diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index 5cdaf08a97ad..ee8a028e6f97 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -98,7 +98,7 @@ void rdt_staged_configs_clear(void) lockdep_assert_held(&rdtgroup_mutex); =20 for_each_alloc_capable_rdt_resource(r) { - list_for_each_entry(dom, &r->domains, list) + list_for_each_entry(dom, &r->domains, hdr.list) memset(dom->staged_config, 0, sizeof(dom->staged_config)); } } @@ -317,7 +317,7 @@ static int rdtgroup_cpus_show(struct kernfs_open_file *= of, rdt_last_cmd_puts("Cache domain offline\n"); ret =3D -ENODEV; } else { - mask =3D &rdtgrp->plr->d->cpu_mask; + mask =3D &rdtgrp->plr->d->hdr.cpu_mask; seq_printf(s, is_cpu_list(of) ? "%*pbl\n" : "%*pb\n", cpumask_pr_args(mask)); @@ -1021,12 +1021,12 @@ static int rdt_bit_usage_show(struct kernfs_open_fi= le *of, cpus_read_lock(); mutex_lock(&rdtgroup_mutex); hw_shareable =3D r->cache.shareable_bits; - list_for_each_entry(dom, &r->domains, list) { + list_for_each_entry(dom, &r->domains, hdr.list) { if (sep) seq_putc(seq, ';'); sw_shareable =3D 0; exclusive =3D 0; - seq_printf(seq, "%d=3D", dom->id); + seq_printf(seq, "%d=3D", dom->hdr.id); for (i =3D 0; i < closids_supported(); i++) { if (!closid_allocated(i)) continue; @@ -1343,7 +1343,7 @@ static bool rdtgroup_mode_test_exclusive(struct rdtgr= oup *rdtgrp) if (r->rid =3D=3D RDT_RESOURCE_MBA || r->rid =3D=3D RDT_RESOURCE_SMBA) continue; has_cache =3D true; - list_for_each_entry(d, &r->domains, list) { + list_for_each_entry(d, &r->domains, hdr.list) { ctrl =3D resctrl_arch_get_config(r, d, closid, s->conf_type); if (rdtgroup_cbm_overlaps(s, d, ctrl, closid, false)) { @@ -1458,7 +1458,7 @@ unsigned int rdtgroup_cbm_to_size(struct rdt_resource= *r, return size; =20 num_b =3D bitmap_weight(&cbm, r->cache.cbm_len); - ci =3D get_cpu_cacheinfo(cpumask_any(&d->cpu_mask)); + ci =3D get_cpu_cacheinfo(cpumask_any(&d->hdr.cpu_mask)); for (i =3D 0; i < ci->num_leaves; i++) { if (ci->info_list[i].level =3D=3D r->scope) { size =3D ci->info_list[i].size / r->cache.cbm_len * num_b; @@ -1506,7 +1506,7 @@ static int rdtgroup_size_show(struct kernfs_open_file= *of, size =3D rdtgroup_cbm_to_size(rdtgrp->plr->s->res, rdtgrp->plr->d, rdtgrp->plr->cbm); - seq_printf(s, "%d=3D%u\n", rdtgrp->plr->d->id, size); + seq_printf(s, "%d=3D%u\n", rdtgrp->plr->d->hdr.id, size); } goto out; } @@ -1518,7 +1518,7 @@ static int rdtgroup_size_show(struct kernfs_open_file= *of, type =3D schema->conf_type; sep =3D false; seq_printf(s, "%*s:", max_name_width, schema->name); - list_for_each_entry(d, &r->domains, list) { + list_for_each_entry(d, &r->domains, hdr.list) { if (sep) seq_putc(s, ';'); if (rdtgrp->mode =3D=3D RDT_MODE_PSEUDO_LOCKSETUP) { @@ -1536,7 +1536,7 @@ static int rdtgroup_size_show(struct kernfs_open_file= *of, else size =3D rdtgroup_cbm_to_size(r, d, ctrl); } - seq_printf(s, "%d=3D%u", d->id, size); + seq_printf(s, "%d=3D%u", d->hdr.id, size); sep =3D true; } seq_putc(s, '\n'); @@ -1596,7 +1596,7 @@ static void mon_event_config_read(void *info) =20 static void mondata_config_read(struct rdt_domain *d, struct mon_config_in= fo *mon_info) { - smp_call_function_any(&d->cpu_mask, mon_event_config_read, mon_info, 1); + smp_call_function_any(&d->hdr.cpu_mask, mon_event_config_read, mon_info, = 1); } =20 static int mbm_config_show(struct seq_file *s, struct rdt_resource *r, u32= evtid) @@ -1608,7 +1608,7 @@ static int mbm_config_show(struct seq_file *s, struct= rdt_resource *r, u32 evtid cpus_read_lock(); mutex_lock(&rdtgroup_mutex); =20 - list_for_each_entry(dom, &r->domains, list) { + list_for_each_entry(dom, &r->domains, hdr.list) { if (sep) seq_puts(s, ";"); =20 @@ -1616,7 +1616,7 @@ static int mbm_config_show(struct seq_file *s, struct= rdt_resource *r, u32 evtid mon_info.evtid =3D evtid; mondata_config_read(dom, &mon_info); =20 - seq_printf(s, "%d=3D0x%02x", dom->id, mon_info.mon_config); + seq_printf(s, "%d=3D0x%02x", dom->hdr.id, mon_info.mon_config); sep =3D true; } seq_puts(s, "\n"); @@ -1682,7 +1682,7 @@ static void mbm_config_write_domain(struct rdt_resour= ce *r, * are scoped at the domain level. Writing any of these MSRs * on one CPU is observed by all the CPUs in the domain. */ - smp_call_function_any(&d->cpu_mask, mon_event_config_write, + smp_call_function_any(&d->hdr.cpu_mask, mon_event_config_write, &mon_info, 1); =20 /* @@ -1732,8 +1732,8 @@ static int mon_config_write(struct rdt_resource *r, c= har *tok, u32 evtid) return -EINVAL; } =20 - list_for_each_entry(d, &r->domains, list) { - if (d->id =3D=3D dom_id) { + list_for_each_entry(d, &r->domains, hdr.list) { + if (d->hdr.id =3D=3D dom_id) { mbm_config_write_domain(r, d, evtid, val); goto next; } @@ -2280,14 +2280,14 @@ static int set_cache_qos_cfg(int level, bool enable) return -ENOMEM; =20 r_l =3D &rdt_resources_all[level].r_resctrl; - list_for_each_entry(d, &r_l->domains, list) { + list_for_each_entry(d, &r_l->domains, hdr.list) { if (r_l->cache.arch_has_per_cpu_cfg) /* Pick all the CPUs in the domain instance */ - for_each_cpu(cpu, &d->cpu_mask) + for_each_cpu(cpu, &d->hdr.cpu_mask) cpumask_set_cpu(cpu, cpu_mask); else /* Pick one CPU from each domain instance to update MSR */ - cpumask_set_cpu(cpumask_any(&d->cpu_mask), cpu_mask); + cpumask_set_cpu(cpumask_any(&d->hdr.cpu_mask), cpu_mask); } =20 /* Update QOS_CFG MSR on all the CPUs in cpu_mask */ @@ -2316,7 +2316,7 @@ void rdt_domain_reconfigure_cdp(struct rdt_resource *= r) static int mba_sc_domain_allocate(struct rdt_resource *r, struct rdt_domai= n *d) { u32 num_closid =3D resctrl_arch_get_num_closid(r); - int cpu =3D cpumask_any(&d->cpu_mask); + int cpu =3D cpumask_any(&d->hdr.cpu_mask); int i; =20 d->mbps_val =3D kcalloc_node(num_closid, sizeof(*d->mbps_val), @@ -2365,7 +2365,7 @@ static int set_mba_sc(bool mba_sc) =20 r->membw.mba_sc =3D mba_sc; =20 - list_for_each_entry(d, &r->domains, list) { + list_for_each_entry(d, &r->domains, hdr.list) { for (i =3D 0; i < num_closid; i++) d->mbps_val[i] =3D MBA_MAX_MBPS; } @@ -2704,7 +2704,7 @@ static int rdt_get_tree(struct fs_context *fc) =20 if (is_mbm_enabled()) { r =3D &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; - list_for_each_entry(dom, &r->domains, list) + list_for_each_entry(dom, &r->domains, hdr.list) mbm_setup_overflow_handler(dom, MBM_OVERFLOW_INTERVAL, RESCTRL_PICK_ANY_CPU); } @@ -2832,9 +2832,9 @@ static int reset_all_ctrls(struct rdt_resource *r) * CBMs in all domains to the maximum mask value. Pick one CPU * from each domain to update the MSRs below. */ - list_for_each_entry(d, &r->domains, list) { + list_for_each_entry(d, &r->domains, hdr.list) { hw_dom =3D resctrl_to_arch_dom(d); - cpu =3D cpumask_any(&d->cpu_mask); + cpu =3D cpumask_any(&d->hdr.cpu_mask); =20 for (i =3D 0; i < hw_res->num_closid; i++) hw_dom->ctrl_val[i] =3D r->default_ctrl; @@ -3037,7 +3037,7 @@ static int mkdir_mondata_subdir(struct kernfs_node *p= arent_kn, char name[32]; int ret; =20 - sprintf(name, "mon_%s_%02d", r->name, d->id); + sprintf(name, "mon_%s_%02d", r->name, d->hdr.id); /* create the directory */ kn =3D kernfs_create_dir(parent_kn, name, parent_kn->mode, prgrp); if (IS_ERR(kn)) @@ -3053,7 +3053,7 @@ static int mkdir_mondata_subdir(struct kernfs_node *p= arent_kn, } =20 priv.u.rid =3D r->rid; - priv.u.domid =3D d->id; + priv.u.domid =3D d->hdr.id; list_for_each_entry(mevt, &r->evt_list, list) { priv.u.evtid =3D mevt->evtid; ret =3D mon_addfile(kn, mevt->name, priv.priv); @@ -3104,7 +3104,7 @@ static int mkdir_mondata_subdir_alldom(struct kernfs_= node *parent_kn, /* Walking r->domains, ensure it can't race with cpuhp */ lockdep_assert_cpus_held(); =20 - list_for_each_entry(dom, &r->domains, list) { + list_for_each_entry(dom, &r->domains, hdr.list) { ret =3D mkdir_mondata_subdir(parent_kn, dom, r, prgrp); if (ret) return ret; @@ -3263,7 +3263,7 @@ static int __init_one_rdt_domain(struct rdt_domain *d= , struct resctrl_schema *s, */ tmp_cbm =3D cfg->new_ctrl; if (bitmap_weight(&tmp_cbm, r->cache.cbm_len) < r->cache.min_cbm_bits) { - rdt_last_cmd_printf("No space on %s:%d\n", s->name, d->id); + rdt_last_cmd_printf("No space on %s:%d\n", s->name, d->hdr.id); return -ENOSPC; } cfg->have_new_ctrl =3D true; @@ -3286,7 +3286,7 @@ static int rdtgroup_init_cat(struct resctrl_schema *s= , u32 closid) struct rdt_domain *d; int ret; =20 - list_for_each_entry(d, &s->res->domains, list) { + list_for_each_entry(d, &s->res->domains, hdr.list) { ret =3D __init_one_rdt_domain(d, s, closid); if (ret < 0) return ret; @@ -3301,7 +3301,7 @@ static void rdtgroup_init_mba(struct rdt_resource *r,= u32 closid) struct resctrl_staged_config *cfg; struct rdt_domain *d; 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28 Feb 2024 11:37:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="7485391" 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; 28 Feb 2024 11:37:19 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , Drew Fustini , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v15 3/8] x86/resctrl: Prepare for different scope for control/monitor operations Date: Wed, 28 Feb 2024 11:36:58 -0800 Message-ID: <20240228193717.8170-5-tony.luck@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240228112935.8087-tony.luck@intel.com> References: <20240228112215.8044-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" Resctrl assumes that control and monitor operations on a resource are performed at the same scope. Prepare for systems that use different scope (specifically Intel needs to split the RDT_RESOURCE_L3 resource to use L3 scope for cache control and NODE scope for cache occupancy and memory bandwidth monitoring). Create separate domain lists for control and monitor operations. Note that errors during initialization of either control or monitor functions on a domain would previously result in that domain being excluded from both control and monitor operations. Now the domains are allocated independently it is no longer required to disable both control and monitor operations if either fail. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 25 ++- arch/x86/kernel/cpu/resctrl/internal.h | 7 +- arch/x86/kernel/cpu/resctrl/core.c | 228 ++++++++++++++++------ arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 12 +- arch/x86/kernel/cpu/resctrl/monitor.c | 4 +- arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 4 +- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 60 +++--- 7 files changed, 240 insertions(+), 100 deletions(-) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index f63fcf17a3bc..8b4def50430a 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -58,15 +58,22 @@ struct resctrl_staged_config { bool have_new_ctrl; }; =20 +enum resctrl_domain_type { + RESCTRL_CTRL_DOMAIN, + RESCTRL_MON_DOMAIN, +}; + /** * struct rdt_domain_hdr - common header for different domain types * @list: all instances of this resource * @id: unique id for this instance + * @type: type of this instance * @cpu_mask: which CPUs share this resource */ struct rdt_domain_hdr { struct list_head list; int id; + enum resctrl_domain_type type; struct cpumask cpu_mask; }; =20 @@ -169,10 +176,12 @@ enum resctrl_scope { * @alloc_capable: Is allocation available on this machine * @mon_capable: Is monitor feature available on this machine * @num_rmid: Number of RMIDs available - * @scope: Scope of this resource + * @ctrl_scope: Scope of this resource for control functions + * @mon_scope: Scope of this resource for monitor functions * @cache: Cache allocation related data * @membw: If the component has bandwidth controls, their properties. - * @domains: RCU list of all domains for this resource + * @ctrl_domains: Control domains for this resource + * @mon_domains: Monitor domains for this resource * @name: Name to use in "schemata" file. * @data_width: Character width of data when displaying * @default_ctrl: Specifies default cache cbm or memory B/W percent. @@ -187,10 +196,12 @@ struct rdt_resource { bool alloc_capable; bool mon_capable; int num_rmid; - enum resctrl_scope scope; + enum resctrl_scope ctrl_scope; + enum resctrl_scope mon_scope; struct resctrl_cache cache; struct resctrl_membw membw; - struct list_head domains; + struct list_head ctrl_domains; + struct list_head mon_domains; char *name; int data_width; u32 default_ctrl; @@ -236,8 +247,10 @@ int resctrl_arch_update_one(struct rdt_resource *r, st= ruct rdt_domain *d, =20 u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, u32 closid, enum resctrl_conf_type type); -int resctrl_online_domain(struct rdt_resource *r, struct rdt_domain *d); -void resctrl_offline_domain(struct rdt_resource *r, struct rdt_domain *d); +int resctrl_online_ctrl_domain(struct rdt_resource *r, struct rdt_domain *= d); +int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_domain *d= ); +void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_domain= *d); +void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain = *d); void resctrl_online_cpu(unsigned int cpu); void resctrl_offline_cpu(unsigned int cpu); =20 diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 8f40fb35db78..1a251cb5f20f 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -557,8 +557,8 @@ void rdtgroup_kn_unlock(struct kernfs_node *kn); int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name); int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name, umode_t mask); -struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id, - struct list_head **pos); +struct rdt_domain_hdr *rdt_find_domain(struct list_head *h, int id, + struct list_head **pos); ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of, char *buf, size_t nbytes, loff_t off); int rdtgroup_schemata_show(struct kernfs_open_file *of, @@ -577,7 +577,8 @@ int rdt_pseudo_lock_init(void); void rdt_pseudo_lock_release(void); int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp); void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp); -struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r); +struct rdt_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resource *= r); +struct rdt_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resource *r= ); int closids_supported(void); void closid_free(int closid); int alloc_rmid(u32 closid); diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index e7f8ab271d86..66a5a270d66f 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -60,7 +60,8 @@ static void mba_wrmsr_intel(struct msr_param *m); static void cat_wrmsr(struct msr_param *m); static void mba_wrmsr_amd(struct msr_param *m); =20 -#define domain_init(id) LIST_HEAD_INIT(rdt_resources_all[id].r_resctrl.dom= ains) +#define ctrl_domain_init(id) LIST_HEAD_INIT(rdt_resources_all[id].r_resctr= l.ctrl_domains) +#define mon_domain_init(id) LIST_HEAD_INIT(rdt_resources_all[id].r_resctrl= .mon_domains) =20 struct rdt_hw_resource rdt_resources_all[] =3D { [RDT_RESOURCE_L3] =3D @@ -68,8 +69,10 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_L3, .name =3D "L3", - .scope =3D RESCTRL_L3_CACHE, - .domains =3D domain_init(RDT_RESOURCE_L3), + .ctrl_scope =3D RESCTRL_L3_CACHE, + .mon_scope =3D RESCTRL_L3_CACHE, + .ctrl_domains =3D ctrl_domain_init(RDT_RESOURCE_L3), + .mon_domains =3D mon_domain_init(RDT_RESOURCE_L3), .parse_ctrlval =3D parse_cbm, .format_str =3D "%d=3D%0*x", .fflags =3D RFTYPE_RES_CACHE, @@ -82,8 +85,8 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_L2, .name =3D "L2", - .scope =3D RESCTRL_L2_CACHE, - .domains =3D domain_init(RDT_RESOURCE_L2), + .ctrl_scope =3D RESCTRL_L2_CACHE, + .ctrl_domains =3D ctrl_domain_init(RDT_RESOURCE_L2), .parse_ctrlval =3D parse_cbm, .format_str =3D "%d=3D%0*x", .fflags =3D RFTYPE_RES_CACHE, @@ -96,8 +99,8 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_MBA, .name =3D "MB", - .scope =3D RESCTRL_L3_CACHE, - .domains =3D domain_init(RDT_RESOURCE_MBA), + .ctrl_scope =3D RESCTRL_L3_CACHE, + .ctrl_domains =3D ctrl_domain_init(RDT_RESOURCE_MBA), .parse_ctrlval =3D parse_bw, .format_str =3D "%d=3D%*u", .fflags =3D RFTYPE_RES_MB, @@ -108,8 +111,8 @@ struct rdt_hw_resource rdt_resources_all[] =3D { .r_resctrl =3D { .rid =3D RDT_RESOURCE_SMBA, .name =3D "SMBA", - .scope =3D RESCTRL_L3_CACHE, - .domains =3D domain_init(RDT_RESOURCE_SMBA), + .ctrl_scope =3D RESCTRL_L3_CACHE, + .ctrl_domains =3D ctrl_domain_init(RDT_RESOURCE_SMBA), .parse_ctrlval =3D parse_bw, .format_str =3D "%d=3D%*u", .fflags =3D RFTYPE_RES_MB, @@ -349,13 +352,28 @@ static void cat_wrmsr(struct msr_param *m) wrmsrl(hw_res->msr_base + i, hw_dom->ctrl_val[i]); } =20 -struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r) +struct rdt_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resource *= r) { struct rdt_domain *d; =20 lockdep_assert_cpus_held(); =20 - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { + /* Find the domain that contains this CPU */ + if (cpumask_test_cpu(cpu, &d->hdr.cpu_mask)) + return d; + } + + return NULL; +} + +struct rdt_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resource *r) +{ + struct rdt_domain *d; + + lockdep_assert_cpus_held(); + + list_for_each_entry(d, &r->mon_domains, hdr.list) { /* Find the domain that contains this CPU */ if (cpumask_test_cpu(cpu, &d->hdr.cpu_mask)) return d; @@ -379,26 +397,26 @@ void rdt_ctrl_update(void *arg) } =20 /* - * rdt_find_domain - Find a domain in a resource that matches input resour= ce id + * rdt_find_domain - Search for a domain id in a resource domain list. * - * Search resource r's domain list to find the resource id. If the resource - * id is found in a domain, return the domain. Otherwise, if requested by - * caller, return the first domain whose id is bigger than the input id. - * The domain list is sorted by id in ascending order. + * Search the domain list to find the domain id. If the domain id is + * found, return the domain. NULL otherwise. If the domain id is not + * found (and NULL returned) then the first domain with id bigger than + * the input id can be returned to the caller via @pos. */ -struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id, - struct list_head **pos) +struct rdt_domain_hdr *rdt_find_domain(struct list_head *h, int id, + struct list_head **pos) { - struct rdt_domain *d; + struct rdt_domain_hdr *d; struct list_head *l; =20 - list_for_each(l, &r->domains) { - d =3D list_entry(l, struct rdt_domain, hdr.list); + list_for_each(l, h) { + d =3D list_entry(l, struct rdt_domain_hdr, list); /* When id is found, return its domain. */ - if (id =3D=3D d->hdr.id) + if (id =3D=3D d->id) return d; /* Stop searching when finding id's position in sorted list. */ - if (id < d->hdr.id) + if (id < d->id) break; } =20 @@ -494,42 +512,29 @@ static int get_domain_id_from_scope(int cpu, enum res= ctrl_scope scope) return -EINVAL; } =20 -/* - * domain_add_cpu - Add a cpu to a resource's domain list. - * - * If an existing domain in the resource r's domain list matches the cpu's - * resource id, add the cpu in the domain. - * - * Otherwise, a new domain is allocated and inserted into the right positi= on - * in the domain list sorted by id in ascending order. - * - * The order in the domain list is visible to users when we print entries - * in the schemata file and schemata input is validated to have the same o= rder - * as this list. - */ -static void domain_add_cpu(int cpu, struct rdt_resource *r) +static void domain_add_cpu_ctrl(int cpu, struct rdt_resource *r) { - int id =3D get_domain_id_from_scope(cpu, r->scope); + int id =3D get_domain_id_from_scope(cpu, r->ctrl_scope); struct list_head *add_pos =3D NULL; struct rdt_hw_domain *hw_dom; + struct rdt_domain_hdr *hdr; struct rdt_domain *d; int err; =20 lockdep_assert_held(&domain_list_lock); =20 if (id < 0) { - pr_warn_once("Can't find domain id for CPU:%d scope:%d for resource %s\n= ", - cpu, r->scope, r->name); + pr_warn_once("Can't find control domain id for CPU:%d scope:%d for resou= rce %s\n", + cpu, r->ctrl_scope, r->name); return; } =20 - d =3D rdt_find_domain(r, id, &add_pos); - if (IS_ERR(d)) { - pr_warn("Couldn't find cache id for CPU %d\n", cpu); - return; - } + hdr =3D rdt_find_domain(&r->ctrl_domains, id, &add_pos); + if (hdr) { + if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_CTRL_DOMAIN)) + return; + d =3D container_of(hdr, struct rdt_domain, hdr); =20 - if (d) { cpumask_set_cpu(cpu, &d->hdr.cpu_mask); if (r->cache.arch_has_per_cpu_cfg) rdt_domain_reconfigure_cdp(r); @@ -542,23 +547,70 @@ static void domain_add_cpu(int cpu, struct rdt_resour= ce *r) =20 d =3D &hw_dom->d_resctrl; d->hdr.id =3D id; + d->hdr.type =3D RESCTRL_CTRL_DOMAIN; cpumask_set_cpu(cpu, &d->hdr.cpu_mask); =20 rdt_domain_reconfigure_cdp(r); =20 - if (r->alloc_capable && domain_setup_ctrlval(r, d)) { + if (domain_setup_ctrlval(r, d)) { domain_free(hw_dom); return; } =20 - if (r->mon_capable && arch_domain_mbm_alloc(r->num_rmid, hw_dom)) { + list_add_tail_rcu(&d->hdr.list, add_pos); + + err =3D resctrl_online_ctrl_domain(r, d); + if (err) { + list_del_rcu(&d->hdr.list); + synchronize_rcu(); + domain_free(hw_dom); + } +} + +static void domain_add_cpu_mon(int cpu, struct rdt_resource *r) +{ + int id =3D get_domain_id_from_scope(cpu, r->mon_scope); + struct list_head *add_pos =3D NULL; + struct rdt_hw_domain *hw_dom; + struct rdt_domain_hdr *hdr; + struct rdt_domain *d; + int err; + + lockdep_assert_held(&domain_list_lock); + + if (id < 0) { + pr_warn_once("Can't find monitor domain id for CPU:%d scope:%d for resou= rce %s\n", + cpu, r->mon_scope, r->name); + return; + } + + hdr =3D rdt_find_domain(&r->mon_domains, id, &add_pos); + if (hdr) { + if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_MON_DOMAIN)) + return; + d =3D container_of(hdr, struct rdt_domain, hdr); + + cpumask_set_cpu(cpu, &d->hdr.cpu_mask); + return; + } + + hw_dom =3D kzalloc_node(sizeof(*hw_dom), GFP_KERNEL, cpu_to_node(cpu)); + if (!hw_dom) + return; + + d =3D &hw_dom->d_resctrl; + d->hdr.id =3D id; + d->hdr.type =3D RESCTRL_MON_DOMAIN; + cpumask_set_cpu(cpu, &d->hdr.cpu_mask); + + if (arch_domain_mbm_alloc(r->num_rmid, hw_dom)) { domain_free(hw_dom); return; } =20 list_add_tail_rcu(&d->hdr.list, add_pos); =20 - err =3D resctrl_online_domain(r, d); + err =3D resctrl_online_mon_domain(r, d); if (err) { list_del_rcu(&d->hdr.list); synchronize_rcu(); @@ -566,30 +618,45 @@ static void domain_add_cpu(int cpu, struct rdt_resour= ce *r) } } =20 -static void domain_remove_cpu(int cpu, struct rdt_resource *r) +static void domain_add_cpu(int cpu, struct rdt_resource *r) +{ + if (r->alloc_capable) + domain_add_cpu_ctrl(cpu, r); + if (r->mon_capable) + domain_add_cpu_mon(cpu, r); +} + +static void domain_remove_cpu_ctrl(int cpu, struct rdt_resource *r) { - int id =3D get_domain_id_from_scope(cpu, r->scope); + int id =3D get_domain_id_from_scope(cpu, r->ctrl_scope); struct rdt_hw_domain *hw_dom; + struct rdt_domain_hdr *hdr; struct rdt_domain *d; =20 lockdep_assert_held(&domain_list_lock); =20 if (id < 0) { - pr_warn_once("Can't find domain id for CPU:%d scope:%d for resource %s\n= ", - cpu, r->scope, r->name); + pr_warn_once("Can't find control domain id for CPU:%d scope:%d for resou= rce %s\n", + cpu, r->ctrl_scope, r->name); return; } =20 - d =3D rdt_find_domain(r, id, NULL); - if (!d) { - pr_warn("Couldn't find domain with id=3D%d for CPU %d\n", id, cpu); + hdr =3D rdt_find_domain(&r->ctrl_domains, id, NULL); + if (!hdr) { + pr_warn("Can't find control domain for id=3D%d for CPU %d for resource %= s\n", + id, cpu, r->name); return; } + + if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_CTRL_DOMAIN)) + return; + + d =3D container_of(hdr, struct rdt_domain, hdr); hw_dom =3D resctrl_to_arch_dom(d); =20 cpumask_clear_cpu(cpu, &d->hdr.cpu_mask); if (cpumask_empty(&d->hdr.cpu_mask)) { - resctrl_offline_domain(r, d); + resctrl_offline_ctrl_domain(r, d); list_del_rcu(&d->hdr.list); synchronize_rcu(); =20 @@ -605,6 +672,53 @@ static void domain_remove_cpu(int cpu, struct rdt_reso= urce *r) } } =20 +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_hw_domain *hw_dom; + struct rdt_domain_hdr *hdr; + struct rdt_domain *d; + + lockdep_assert_held(&domain_list_lock); + + if (id < 0) { + pr_warn_once("Can't find monitor domain id for CPU:%d scope:%d for resou= rce %s\n", + cpu, r->mon_scope, r->name); + return; + } + + hdr =3D rdt_find_domain(&r->mon_domains, id, NULL); + if (!hdr) { + pr_warn("Can't find monitor domain for id=3D%d for CPU %d for resource %= s\n", + id, cpu, r->name); + return; + } + + if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_MON_DOMAIN)) + return; + + d =3D container_of(hdr, struct rdt_domain, hdr); + hw_dom =3D resctrl_to_arch_dom(d); + + cpumask_clear_cpu(cpu, &d->hdr.cpu_mask); + if (cpumask_empty(&d->hdr.cpu_mask)) { + resctrl_offline_mon_domain(r, d); + list_del_rcu(&d->hdr.list); + synchronize_rcu(); + domain_free(hw_dom); + + return; + } +} + +static void domain_remove_cpu(int cpu, struct rdt_resource *r) +{ + if (r->alloc_capable) + domain_remove_cpu_ctrl(cpu, r); + if (r->mon_capable) + domain_remove_cpu_mon(cpu, r); +} + static void clear_closid_rmid(int cpu) { struct resctrl_pqr_state *state =3D this_cpu_ptr(&pqr_state); diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cp= u/resctrl/ctrlmondata.c index f49a96b81346..6a899e22b84e 100644 --- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c +++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c @@ -231,7 +231,7 @@ static int parse_line(char *line, struct resctrl_schema= *s, return -EINVAL; } dom =3D strim(dom); - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { if (d->hdr.id =3D=3D dom_id) { data.buf =3D dom; data.rdtgrp =3D rdtgrp; @@ -307,7 +307,7 @@ int resctrl_arch_update_domains(struct rdt_resource *r,= u32 closid) /* Walking r->domains, ensure it can't race with cpuhp */ lockdep_assert_cpus_held(); =20 - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { hw_dom =3D resctrl_to_arch_dom(d); msr_param.res =3D NULL; msr_param.dom =3D d; @@ -452,7 +452,7 @@ static void show_doms(struct seq_file *s, struct resctr= l_schema *schema, int clo lockdep_assert_cpus_held(); =20 seq_printf(s, "%*s:", max_name_width, schema->name); - list_for_each_entry(dom, &r->domains, hdr.list) { + list_for_each_entry(dom, &r->ctrl_domains, hdr.list) { if (sep) seq_puts(s, ";"); =20 @@ -558,6 +558,7 @@ void mon_event_read(struct rmid_read *rr, struct rdt_re= source *r, int rdtgroup_mondata_show(struct seq_file *m, void *arg) { struct kernfs_open_file *of =3D m->private; + struct rdt_domain_hdr *hdr; u32 resid, evtid, domid; struct rdtgroup *rdtgrp; struct rdt_resource *r; @@ -578,11 +579,12 @@ int rdtgroup_mondata_show(struct seq_file *m, void *a= rg) evtid =3D md.u.evtid; =20 r =3D &rdt_resources_all[resid].r_resctrl; - d =3D rdt_find_domain(r, domid, NULL); - if (!d) { + hdr =3D rdt_find_domain(&r->mon_domains, domid, NULL); + if (!hdr || WARN_ON_ONCE(hdr->type !=3D RESCTRL_MON_DOMAIN)) { ret =3D -ENOENT; goto out; } + d =3D container_of(hdr, struct rdt_domain, hdr); =20 mon_event_read(&rr, r, d, rdtgrp, evtid, false); =20 diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/re= sctrl/monitor.c index 54f7688ee447..b7d831712dc4 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -479,7 +479,7 @@ static void add_rmid_to_limbo(struct rmid_entry *entry) idx =3D resctrl_arch_rmid_idx_encode(entry->closid, entry->rmid); =20 entry->busy =3D 0; - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->mon_domains, hdr.list) { /* * For the first limbo RMID in the domain, * setup up the limbo worker. @@ -676,7 +676,7 @@ static void update_mba_bw(struct rdtgroup *rgrp, struct= rdt_domain *dom_mbm) idx =3D resctrl_arch_rmid_idx_encode(closid, rmid); pmbm_data =3D &dom_mbm->mbm_local[idx]; =20 - dom_mba =3D get_domain_from_cpu(smp_processor_id(), r_mba); + dom_mba =3D get_ctrl_domain_from_cpu(smp_processor_id(), r_mba); if (!dom_mba) { pr_warn_once("Failure to get domain for MBA update\n"); return; diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cp= u/resctrl/pseudo_lock.c index 52e6935e4c55..2a48eedafe3d 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c +++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c @@ -292,7 +292,7 @@ static void pseudo_lock_region_clear(struct pseudo_lock= _region *plr) */ static int pseudo_lock_region_init(struct pseudo_lock_region *plr) { - enum resctrl_scope scope =3D plr->s->res->scope; + enum resctrl_scope scope =3D plr->s->res->ctrl_scope; struct cpu_cacheinfo *ci; int ret; int i; @@ -859,7 +859,7 @@ bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_dom= ain *d) * associated with them. */ for_each_alloc_capable_rdt_resource(r) { - list_for_each_entry(d_i, &r->domains, hdr.list) { + list_for_each_entry(d_i, &r->ctrl_domains, hdr.list) { if (d_i->plr) cpumask_or(cpu_with_psl, cpu_with_psl, &d_i->hdr.cpu_mask); diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index ee8a028e6f97..01ed7bab1002 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -98,7 +98,7 @@ void rdt_staged_configs_clear(void) lockdep_assert_held(&rdtgroup_mutex); =20 for_each_alloc_capable_rdt_resource(r) { - list_for_each_entry(dom, &r->domains, hdr.list) + list_for_each_entry(dom, &r->ctrl_domains, hdr.list) memset(dom->staged_config, 0, sizeof(dom->staged_config)); } } @@ -1021,7 +1021,7 @@ static int rdt_bit_usage_show(struct kernfs_open_file= *of, cpus_read_lock(); mutex_lock(&rdtgroup_mutex); hw_shareable =3D r->cache.shareable_bits; - list_for_each_entry(dom, &r->domains, hdr.list) { + list_for_each_entry(dom, &r->ctrl_domains, hdr.list) { if (sep) seq_putc(seq, ';'); sw_shareable =3D 0; @@ -1343,7 +1343,7 @@ static bool rdtgroup_mode_test_exclusive(struct rdtgr= oup *rdtgrp) if (r->rid =3D=3D RDT_RESOURCE_MBA || r->rid =3D=3D RDT_RESOURCE_SMBA) continue; has_cache =3D true; - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { ctrl =3D resctrl_arch_get_config(r, d, closid, s->conf_type); if (rdtgroup_cbm_overlaps(s, d, ctrl, closid, false)) { @@ -1454,13 +1454,13 @@ unsigned int rdtgroup_cbm_to_size(struct rdt_resour= ce *r, unsigned int size =3D 0; int num_b, i; =20 - if (WARN_ON_ONCE(r->scope !=3D RESCTRL_L2_CACHE && r->scope !=3D RESCTRL_= L3_CACHE)) + if (WARN_ON_ONCE(r->ctrl_scope !=3D RESCTRL_L2_CACHE && r->ctrl_scope != =3D RESCTRL_L3_CACHE)) return size; =20 num_b =3D bitmap_weight(&cbm, r->cache.cbm_len); ci =3D get_cpu_cacheinfo(cpumask_any(&d->hdr.cpu_mask)); for (i =3D 0; i < ci->num_leaves; i++) { - if (ci->info_list[i].level =3D=3D r->scope) { + if (ci->info_list[i].level =3D=3D r->ctrl_scope) { size =3D ci->info_list[i].size / r->cache.cbm_len * num_b; break; } @@ -1518,7 +1518,7 @@ static int rdtgroup_size_show(struct kernfs_open_file= *of, type =3D schema->conf_type; sep =3D false; seq_printf(s, "%*s:", max_name_width, schema->name); - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { if (sep) seq_putc(s, ';'); if (rdtgrp->mode =3D=3D RDT_MODE_PSEUDO_LOCKSETUP) { @@ -1608,7 +1608,7 @@ static int mbm_config_show(struct seq_file *s, struct= rdt_resource *r, u32 evtid cpus_read_lock(); mutex_lock(&rdtgroup_mutex); =20 - list_for_each_entry(dom, &r->domains, hdr.list) { + list_for_each_entry(dom, &r->mon_domains, hdr.list) { if (sep) seq_puts(s, ";"); =20 @@ -1732,7 +1732,7 @@ static int mon_config_write(struct rdt_resource *r, c= har *tok, u32 evtid) return -EINVAL; } =20 - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->mon_domains, hdr.list) { if (d->hdr.id =3D=3D dom_id) { mbm_config_write_domain(r, d, evtid, val); goto next; @@ -2280,7 +2280,7 @@ static int set_cache_qos_cfg(int level, bool enable) return -ENOMEM; =20 r_l =3D &rdt_resources_all[level].r_resctrl; - list_for_each_entry(d, &r_l->domains, hdr.list) { + list_for_each_entry(d, &r_l->ctrl_domains, hdr.list) { if (r_l->cache.arch_has_per_cpu_cfg) /* Pick all the CPUs in the domain instance */ for_each_cpu(cpu, &d->hdr.cpu_mask) @@ -2365,7 +2365,7 @@ static int set_mba_sc(bool mba_sc) =20 r->membw.mba_sc =3D mba_sc; =20 - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { for (i =3D 0; i < num_closid; i++) d->mbps_val[i] =3D MBA_MAX_MBPS; } @@ -2704,7 +2704,7 @@ static int rdt_get_tree(struct fs_context *fc) =20 if (is_mbm_enabled()) { r =3D &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; - list_for_each_entry(dom, &r->domains, hdr.list) + list_for_each_entry(dom, &r->mon_domains, hdr.list) mbm_setup_overflow_handler(dom, MBM_OVERFLOW_INTERVAL, RESCTRL_PICK_ANY_CPU); } @@ -2829,10 +2829,10 @@ static int reset_all_ctrls(struct rdt_resource *r) =20 /* * Disable resource control for this resource by setting all - * CBMs in all domains to the maximum mask value. Pick one CPU + * CBMs in all ctrl_domains to the maximum mask value. Pick one CPU * from each domain to update the MSRs below. */ - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { hw_dom =3D resctrl_to_arch_dom(d); cpu =3D cpumask_any(&d->hdr.cpu_mask); =20 @@ -3104,7 +3104,7 @@ static int mkdir_mondata_subdir_alldom(struct kernfs_= node *parent_kn, /* Walking r->domains, ensure it can't race with cpuhp */ lockdep_assert_cpus_held(); =20 - list_for_each_entry(dom, &r->domains, hdr.list) { + list_for_each_entry(dom, &r->mon_domains, hdr.list) { ret =3D mkdir_mondata_subdir(parent_kn, dom, r, prgrp); if (ret) return ret; @@ -3286,7 +3286,7 @@ static int rdtgroup_init_cat(struct resctrl_schema *s= , u32 closid) struct rdt_domain *d; int ret; =20 - list_for_each_entry(d, &s->res->domains, hdr.list) { + list_for_each_entry(d, &s->res->ctrl_domains, hdr.list) { ret =3D __init_one_rdt_domain(d, s, closid); if (ret < 0) return ret; @@ -3301,7 +3301,7 @@ static void rdtgroup_init_mba(struct rdt_resource *r,= u32 closid) struct resctrl_staged_config *cfg; struct rdt_domain *d; =20 - list_for_each_entry(d, &r->domains, hdr.list) { + list_for_each_entry(d, &r->ctrl_domains, hdr.list) { if (is_mba_sc(r)) { d->mbps_val[closid] =3D MBA_MAX_MBPS; continue; @@ -3932,15 +3932,19 @@ static void domain_destroy_mon_state(struct rdt_dom= ain *d) kfree(d->mbm_local); } =20 -void resctrl_offline_domain(struct rdt_resource *r, struct rdt_domain *d) +void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_domain= *d) { mutex_lock(&rdtgroup_mutex); =20 if (supports_mba_mbps() && r->rid =3D=3D RDT_RESOURCE_MBA) mba_sc_domain_destroy(r, d); =20 - if (!r->mon_capable) - goto out_unlock; + mutex_unlock(&rdtgroup_mutex); +} + +void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain = *d) +{ + mutex_lock(&rdtgroup_mutex); =20 /* * If resctrl is mounted, remove all the @@ -3966,7 +3970,6 @@ void resctrl_offline_domain(struct rdt_resource *r, s= truct rdt_domain *d) =20 domain_destroy_mon_state(d); =20 -out_unlock: mutex_unlock(&rdtgroup_mutex); } =20 @@ -4001,7 +4004,7 @@ static int domain_setup_mon_state(struct rdt_resource= *r, struct rdt_domain *d) return 0; } =20 -int resctrl_online_domain(struct rdt_resource *r, struct rdt_domain *d) +int resctrl_online_ctrl_domain(struct rdt_resource *r, struct rdt_domain *= d) { int err =3D 0; =20 @@ -4010,11 +4013,18 @@ int resctrl_online_domain(struct rdt_resource *r, s= truct rdt_domain *d) if (supports_mba_mbps() && r->rid =3D=3D RDT_RESOURCE_MBA) { /* RDT_RESOURCE_MBA is never mon_capable */ err =3D mba_sc_domain_allocate(r, d); - goto out_unlock; } =20 - if (!r->mon_capable) - goto out_unlock; + mutex_unlock(&rdtgroup_mutex); + + return err; +} + +int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_domain *d) +{ + int err; + + mutex_lock(&rdtgroup_mutex); =20 err =3D domain_setup_mon_state(r, d); if (err) @@ -4079,7 +4089,7 @@ void resctrl_offline_cpu(unsigned int cpu) if (!l3->mon_capable) goto out_unlock; =20 - d =3D get_domain_from_cpu(cpu, l3); + d =3D get_mon_domain_from_cpu(cpu, l3); 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charset="utf-8" The same rdt_domain structure is used for both control and monitor functions. But this results in wasted memory as some of the fields are only used by control functions, while most are only used for monitor functions. Split into separate rdt_ctrl_domain and rdt_mon_domain structures with just the fields required for control and monitoring respectively. Similar split of the rdt_hw_domain structure into rdt_hw_ctrl_domain and rdt_hw_mon_domain. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 48 ++++++++------- arch/x86/kernel/cpu/resctrl/internal.h | 62 ++++++++++++-------- arch/x86/kernel/cpu/resctrl/core.c | 71 ++++++++++++----------- arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 28 ++++----- arch/x86/kernel/cpu/resctrl/monitor.c | 40 ++++++------- arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 6 +- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 64 ++++++++++---------- 7 files changed, 174 insertions(+), 145 deletions(-) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 8b4def50430a..1a4ac60522bb 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -78,7 +78,23 @@ struct rdt_domain_hdr { }; =20 /** - * struct rdt_domain - group of CPUs sharing a resctrl resource + * struct rdt_ctrl_domain - group of CPUs sharing a resctrl control resour= ce + * @hdr: common header for different domain types + * @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 + * specified control values for mba_sc in MBps, indexed + * by closid + */ +struct rdt_ctrl_domain { + struct rdt_domain_hdr hdr; + struct pseudo_lock_region *plr; + struct resctrl_staged_config staged_config[CDP_NUM_TYPES]; + u32 *mbps_val; +}; + +/** + * struct rdt_mon_domain - group of CPUs sharing a resctrl monitor resource * @hdr: common header for different domain types * @rmid_busy_llc: bitmap of which limbo RMIDs are above threshold * @mbm_total: saved state for MBM total bandwidth @@ -87,13 +103,8 @@ struct rdt_domain_hdr { * @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 - * @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 - * specified control values for mba_sc in MBps, indexed - * by closid */ -struct rdt_domain { +struct rdt_mon_domain { struct rdt_domain_hdr hdr; unsigned long *rmid_busy_llc; struct mbm_state *mbm_total; @@ -102,9 +113,6 @@ struct rdt_domain { struct delayed_work cqm_limbo; int mbm_work_cpu; int cqm_work_cpu; - struct pseudo_lock_region *plr; - struct resctrl_staged_config staged_config[CDP_NUM_TYPES]; - u32 *mbps_val; }; =20 /** @@ -208,7 +216,7 @@ struct rdt_resource { const char *format_str; int (*parse_ctrlval)(struct rdt_parse_data *data, struct resctrl_schema *s, - struct rdt_domain *d); + struct rdt_ctrl_domain *d); struct list_head evt_list; unsigned long fflags; bool cdp_capable; @@ -242,15 +250,15 @@ int resctrl_arch_update_domains(struct rdt_resource *= r, u32 closid); * Update the ctrl_val and apply this config right now. * Must be called on one of the domain's CPUs. */ -int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, +int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_ctrl_domain= *d, u32 closid, enum resctrl_conf_type t, u32 cfg_val); =20 -u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, +u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_ctrl_domain= *d, u32 closid, enum resctrl_conf_type type); -int resctrl_online_ctrl_domain(struct rdt_resource *r, struct rdt_domain *= d); -int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_domain *d= ); -void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_domain= *d); -void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain = *d); +int resctrl_online_ctrl_domain(struct rdt_resource *r, struct rdt_ctrl_dom= ain *d); +int resctrl_online_mon_domain(struct rdt_resource *r, struct rdt_mon_domai= n *d); +void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_ctrl_d= omain *d); +void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_mon_dom= ain *d); void resctrl_online_cpu(unsigned int cpu); void resctrl_offline_cpu(unsigned int cpu); =20 @@ -279,7 +287,7 @@ void resctrl_offline_cpu(unsigned int cpu); * Return: * 0 on success, or -EIO, -EINVAL etc on error. */ -int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain *d, +int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_mon_domain *= d, u32 closid, u32 rmid, enum resctrl_event_id eventid, u64 *val, void *arch_mon_ctx); =20 @@ -312,7 +320,7 @@ static inline void resctrl_arch_rmid_read_context_check= (void) * * This can be called from any CPU. */ -void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_domain *d, +void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_mon_domain= *d, u32 closid, u32 rmid, enum resctrl_event_id eventid); =20 @@ -325,7 +333,7 @@ void resctrl_arch_reset_rmid(struct rdt_resource *r, st= ruct rdt_domain *d, * * This can be called from any CPU. */ -void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_domain= *d); +void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_mon_do= main *d); =20 extern unsigned int resctrl_rmid_realloc_threshold; extern unsigned int resctrl_rmid_realloc_limit; diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 1a251cb5f20f..41a093feb744 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -146,7 +146,7 @@ union mon_data_bits { struct rmid_read { struct rdtgroup *rgrp; struct rdt_resource *r; - struct rdt_domain *d; + struct rdt_mon_domain *d; enum resctrl_event_id evtid; bool first; int err; @@ -231,7 +231,7 @@ struct mongroup { */ struct pseudo_lock_region { struct resctrl_schema *s; - struct rdt_domain *d; + struct rdt_ctrl_domain *d; u32 cbm; wait_queue_head_t lock_thread_wq; int thread_done; @@ -354,25 +354,41 @@ struct arch_mbm_state { }; =20 /** - * struct rdt_hw_domain - Arch private attributes of a set of CPUs that sh= are - * a resource + * struct rdt_hw_ctrl_domain - Arch private attributes of a set of CPUs th= at share + * a resource for a control function * @d_resctrl: Properties exposed to the resctrl file system * @ctrl_val: array of cache or mem ctrl values (indexed by CLOSID) + * + * Members of this structure are accessed via helpers that provide abstrac= tion. + */ +struct rdt_hw_ctrl_domain { + struct rdt_ctrl_domain d_resctrl; + u32 *ctrl_val; +}; + +/** + * struct rdt_hw_mon_domain - Arch private attributes of a set of CPUs tha= t share + * a resource for a monitor function + * @d_resctrl: Properties exposed to the resctrl file system * @arch_mbm_total: arch private state for MBM total bandwidth * @arch_mbm_local: arch private state for MBM local bandwidth * * Members of this structure are accessed via helpers that provide abstrac= tion. */ -struct rdt_hw_domain { - struct rdt_domain d_resctrl; - u32 *ctrl_val; +struct rdt_hw_mon_domain { + struct rdt_mon_domain d_resctrl; struct arch_mbm_state *arch_mbm_total; struct arch_mbm_state *arch_mbm_local; }; =20 -static inline struct rdt_hw_domain *resctrl_to_arch_dom(struct rdt_domain = *r) +static inline struct rdt_hw_ctrl_domain *resctrl_to_arch_ctrl_dom(struct r= dt_ctrl_domain *r) +{ + return container_of(r, struct rdt_hw_ctrl_domain, d_resctrl); +} + +static inline struct rdt_hw_mon_domain *resctrl_to_arch_mon_dom(struct rdt= _mon_domain *r) { - return container_of(r, struct rdt_hw_domain, d_resctrl); + return container_of(r, struct rdt_hw_mon_domain, d_resctrl); } =20 /** @@ -384,7 +400,7 @@ static inline struct rdt_hw_domain *resctrl_to_arch_dom= (struct rdt_domain *r) */ struct msr_param { struct rdt_resource *res; - struct rdt_domain *dom; + struct rdt_ctrl_domain *dom; u32 low; u32 high; }; @@ -457,9 +473,9 @@ static inline struct rdt_hw_resource *resctrl_to_arch_r= es(struct rdt_resource *r } =20 int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s, - struct rdt_domain *d); + struct rdt_ctrl_domain *d); int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s, - struct rdt_domain *d); + struct rdt_ctrl_domain *d); =20 extern struct mutex rdtgroup_mutex; =20 @@ -563,22 +579,22 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_fi= le *of, char *buf, size_t nbytes, loff_t off); int rdtgroup_schemata_show(struct kernfs_open_file *of, struct seq_file *s, void *v); -bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_domain *d, +bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_ctrl_domai= n *d, unsigned long cbm, int closid, bool exclusive); -unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_domai= n *d, +unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_ctrl_= domain *d, unsigned long cbm); enum rdtgrp_mode rdtgroup_mode_by_closid(int closid); int rdtgroup_tasks_assigned(struct rdtgroup *r); int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp); int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp); -bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned lo= ng cbm); -bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d); +bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_ctrl_domain *d, unsign= ed long cbm); +bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_ctrl_domain *d); int rdt_pseudo_lock_init(void); void rdt_pseudo_lock_release(void); int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp); void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp); -struct rdt_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resource *= r); -struct rdt_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resource *r= ); +struct rdt_ctrl_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resou= rce *r); +struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resourc= e *r); int closids_supported(void); void closid_free(int closid); int alloc_rmid(u32 closid); @@ -589,19 +605,19 @@ bool __init rdt_cpu_has(int flag); void mon_event_count(void *info); int rdtgroup_mondata_show(struct seq_file *m, void *arg); void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, - struct rdt_domain *d, struct rdtgroup *rdtgrp, + struct rdt_mon_domain *d, struct rdtgroup *rdtgrp, int evtid, int first); -void mbm_setup_overflow_handler(struct rdt_domain *dom, +void mbm_setup_overflow_handler(struct rdt_mon_domain *dom, unsigned long delay_ms, int exclude_cpu); void mbm_handle_overflow(struct work_struct *work); void __init intel_rdt_mbm_apply_quirk(void); bool is_mba_sc(struct rdt_resource *r); -void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_m= s, +void cqm_setup_limbo_handler(struct rdt_mon_domain *dom, unsigned long del= ay_ms, int exclude_cpu); void cqm_handle_limbo(struct work_struct *work); -bool has_busy_rmid(struct rdt_domain *d); -void __check_limbo(struct rdt_domain *d, bool force_free); +bool has_busy_rmid(struct rdt_mon_domain *d); +void __check_limbo(struct rdt_mon_domain *d, bool force_free); void rdt_domain_reconfigure_cdp(struct rdt_resource *r); void __init thread_throttle_mode_init(void); void __init mbm_config_rftype_init(const char *config); diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index 66a5a270d66f..cd58c9d4710f 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -309,8 +309,8 @@ static void rdt_get_cdp_l2_config(void) =20 static void mba_wrmsr_amd(struct msr_param *m) { + struct rdt_hw_ctrl_domain *hw_dom =3D resctrl_to_arch_ctrl_dom(m->dom); struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(m->res); - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(m->dom); unsigned int i; =20 for (i =3D m->low; i < m->high; i++) @@ -333,8 +333,8 @@ static u32 delay_bw_map(unsigned long bw, struct rdt_re= source *r) =20 static void mba_wrmsr_intel(struct msr_param *m) { + struct rdt_hw_ctrl_domain *hw_dom =3D resctrl_to_arch_ctrl_dom(m->dom); struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(m->res); - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(m->dom); unsigned int i; =20 /* Write the delay values for mba. */ @@ -344,17 +344,17 @@ static void mba_wrmsr_intel(struct msr_param *m) =20 static void cat_wrmsr(struct msr_param *m) { + struct rdt_hw_ctrl_domain *hw_dom =3D resctrl_to_arch_ctrl_dom(m->dom); struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(m->res); - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(m->dom); unsigned int i; =20 for (i =3D m->low; i < m->high; i++) wrmsrl(hw_res->msr_base + i, hw_dom->ctrl_val[i]); } =20 -struct rdt_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resource *= r) +struct rdt_ctrl_domain *get_ctrl_domain_from_cpu(int cpu, struct rdt_resou= rce *r) { - struct rdt_domain *d; + struct rdt_ctrl_domain *d; =20 lockdep_assert_cpus_held(); =20 @@ -367,9 +367,9 @@ struct rdt_domain *get_ctrl_domain_from_cpu(int cpu, st= ruct rdt_resource *r) return NULL; } =20 -struct rdt_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resource *r) +struct rdt_mon_domain *get_mon_domain_from_cpu(int cpu, struct rdt_resourc= e *r) { - struct rdt_domain *d; + struct rdt_mon_domain *d; =20 lockdep_assert_cpus_held(); =20 @@ -440,18 +440,23 @@ static void setup_default_ctrlval(struct rdt_resource= *r, u32 *dc) *dc =3D r->default_ctrl; } =20 -static void domain_free(struct rdt_hw_domain *hw_dom) +static void ctrl_domain_free(struct rdt_hw_ctrl_domain *hw_dom) +{ + kfree(hw_dom->ctrl_val); + kfree(hw_dom); +} + +static void mon_domain_free(struct rdt_hw_mon_domain *hw_dom) { kfree(hw_dom->arch_mbm_total); kfree(hw_dom->arch_mbm_local); - kfree(hw_dom->ctrl_val); kfree(hw_dom); } =20 -static int domain_setup_ctrlval(struct rdt_resource *r, struct rdt_domain = *d) +static int domain_setup_ctrlval(struct rdt_resource *r, struct rdt_ctrl_do= main *d) { + struct rdt_hw_ctrl_domain *hw_dom =3D resctrl_to_arch_ctrl_dom(d); struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(r); - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(d); struct msr_param m; u32 *dc; =20 @@ -476,7 +481,7 @@ static int domain_setup_ctrlval(struct rdt_resource *r,= struct rdt_domain *d) * @num_rmid: The size of the MBM counter array * @hw_dom: The domain that owns the allocated arrays */ -static int arch_domain_mbm_alloc(u32 num_rmid, struct rdt_hw_domain *hw_do= m) +static int arch_domain_mbm_alloc(u32 num_rmid, struct rdt_hw_mon_domain *h= w_dom) { size_t tsize; =20 @@ -515,10 +520,10 @@ static int get_domain_id_from_scope(int cpu, enum res= ctrl_scope scope) static void domain_add_cpu_ctrl(int cpu, struct rdt_resource *r) { int id =3D get_domain_id_from_scope(cpu, r->ctrl_scope); + struct rdt_hw_ctrl_domain *hw_dom; struct list_head *add_pos =3D NULL; - struct rdt_hw_domain *hw_dom; struct rdt_domain_hdr *hdr; - struct rdt_domain *d; + struct rdt_ctrl_domain *d; int err; =20 lockdep_assert_held(&domain_list_lock); @@ -533,7 +538,7 @@ static void domain_add_cpu_ctrl(int cpu, struct rdt_res= ource *r) if (hdr) { if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_CTRL_DOMAIN)) return; - d =3D container_of(hdr, struct rdt_domain, hdr); + d =3D container_of(hdr, struct rdt_ctrl_domain, hdr); =20 cpumask_set_cpu(cpu, &d->hdr.cpu_mask); if (r->cache.arch_has_per_cpu_cfg) @@ -553,7 +558,7 @@ static void domain_add_cpu_ctrl(int cpu, struct rdt_res= ource *r) rdt_domain_reconfigure_cdp(r); =20 if (domain_setup_ctrlval(r, d)) { - domain_free(hw_dom); + ctrl_domain_free(hw_dom); return; } =20 @@ -563,7 +568,7 @@ static void domain_add_cpu_ctrl(int cpu, struct rdt_res= ource *r) if (err) { list_del_rcu(&d->hdr.list); synchronize_rcu(); - domain_free(hw_dom); + ctrl_domain_free(hw_dom); } } =20 @@ -571,9 +576,9 @@ static void domain_add_cpu_mon(int cpu, struct rdt_reso= urce *r) { int id =3D get_domain_id_from_scope(cpu, r->mon_scope); struct list_head *add_pos =3D NULL; - struct rdt_hw_domain *hw_dom; + struct rdt_hw_mon_domain *hw_dom; struct rdt_domain_hdr *hdr; - struct rdt_domain *d; + struct rdt_mon_domain *d; int err; =20 lockdep_assert_held(&domain_list_lock); @@ -588,7 +593,7 @@ static void domain_add_cpu_mon(int cpu, struct rdt_reso= urce *r) if (hdr) { if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_MON_DOMAIN)) return; - d =3D container_of(hdr, struct rdt_domain, hdr); + d =3D container_of(hdr, struct rdt_mon_domain, hdr); =20 cpumask_set_cpu(cpu, &d->hdr.cpu_mask); return; @@ -604,7 +609,7 @@ static void domain_add_cpu_mon(int cpu, struct rdt_reso= urce *r) cpumask_set_cpu(cpu, &d->hdr.cpu_mask); =20 if (arch_domain_mbm_alloc(r->num_rmid, hw_dom)) { - domain_free(hw_dom); + mon_domain_free(hw_dom); return; } =20 @@ -614,7 +619,7 @@ static void domain_add_cpu_mon(int cpu, struct rdt_reso= urce *r) if (err) { list_del_rcu(&d->hdr.list); synchronize_rcu(); - domain_free(hw_dom); + mon_domain_free(hw_dom); } } =20 @@ -629,9 +634,9 @@ static void domain_add_cpu(int cpu, struct rdt_resource= *r) static void domain_remove_cpu_ctrl(int cpu, struct rdt_resource *r) { int id =3D get_domain_id_from_scope(cpu, r->ctrl_scope); - struct rdt_hw_domain *hw_dom; + struct rdt_hw_ctrl_domain *hw_dom; struct rdt_domain_hdr *hdr; - struct rdt_domain *d; + struct rdt_ctrl_domain *d; =20 lockdep_assert_held(&domain_list_lock); =20 @@ -651,8 +656,8 @@ static void domain_remove_cpu_ctrl(int cpu, struct rdt_= resource *r) if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_CTRL_DOMAIN)) return; =20 - d =3D container_of(hdr, struct rdt_domain, hdr); - hw_dom =3D resctrl_to_arch_dom(d); + d =3D container_of(hdr, struct rdt_ctrl_domain, hdr); + hw_dom =3D resctrl_to_arch_ctrl_dom(d); =20 cpumask_clear_cpu(cpu, &d->hdr.cpu_mask); if (cpumask_empty(&d->hdr.cpu_mask)) { @@ -661,12 +666,12 @@ static void domain_remove_cpu_ctrl(int cpu, struct rd= t_resource *r) synchronize_rcu(); =20 /* - * rdt_domain "d" is going to be freed below, so clear + * rdt_ctrl_domain "d" is going to be freed below, so clear * its pointer from pseudo_lock_region struct. */ if (d->plr) d->plr->d =3D NULL; - domain_free(hw_dom); + ctrl_domain_free(hw_dom); =20 return; } @@ -675,9 +680,9 @@ 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_hw_domain *hw_dom; + struct rdt_hw_mon_domain *hw_dom; struct rdt_domain_hdr *hdr; - struct rdt_domain *d; + struct rdt_mon_domain *d; =20 lockdep_assert_held(&domain_list_lock); =20 @@ -697,15 +702,15 @@ static void domain_remove_cpu_mon(int cpu, struct rdt= _resource *r) if (WARN_ON_ONCE(hdr->type !=3D RESCTRL_MON_DOMAIN)) return; =20 - d =3D container_of(hdr, struct rdt_domain, hdr); - hw_dom =3D resctrl_to_arch_dom(d); + d =3D container_of(hdr, struct rdt_mon_domain, hdr); + hw_dom =3D resctrl_to_arch_mon_dom(d); =20 cpumask_clear_cpu(cpu, &d->hdr.cpu_mask); if (cpumask_empty(&d->hdr.cpu_mask)) { resctrl_offline_mon_domain(r, d); list_del_rcu(&d->hdr.list); synchronize_rcu(); - domain_free(hw_dom); + mon_domain_free(hw_dom); =20 return; } diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cp= u/resctrl/ctrlmondata.c index 6a899e22b84e..d6bf88c1ebe2 100644 --- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c +++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c @@ -60,7 +60,7 @@ static bool bw_validate(char *buf, unsigned long *data, s= truct rdt_resource *r) } =20 int parse_bw(struct rdt_parse_data *data, struct resctrl_schema *s, - struct rdt_domain *d) + struct rdt_ctrl_domain *d) { struct resctrl_staged_config *cfg; u32 closid =3D data->rdtgrp->closid; @@ -139,7 +139,7 @@ static bool cbm_validate(char *buf, u32 *data, struct r= dt_resource *r) * resource type. */ int parse_cbm(struct rdt_parse_data *data, struct resctrl_schema *s, - struct rdt_domain *d) + struct rdt_ctrl_domain *d) { struct rdtgroup *rdtgrp =3D data->rdtgrp; struct resctrl_staged_config *cfg; @@ -208,8 +208,8 @@ static int parse_line(char *line, struct resctrl_schema= *s, struct resctrl_staged_config *cfg; struct rdt_resource *r =3D s->res; struct rdt_parse_data data; + struct rdt_ctrl_domain *d; char *dom =3D NULL, *id; - struct rdt_domain *d; unsigned long dom_id; =20 /* Walking r->domains, ensure it can't race with cpuhp */ @@ -272,11 +272,11 @@ static u32 get_config_index(u32 closid, enum resctrl_= conf_type type) } } =20 -int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_domain *d, +int resctrl_arch_update_one(struct rdt_resource *r, struct rdt_ctrl_domain= *d, u32 closid, enum resctrl_conf_type t, u32 cfg_val) { + struct rdt_hw_ctrl_domain *hw_dom =3D resctrl_to_arch_ctrl_dom(d); struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(r); - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(d); u32 idx =3D get_config_index(closid, t); struct msr_param msr_param; =20 @@ -297,10 +297,10 @@ int resctrl_arch_update_one(struct rdt_resource *r, s= truct rdt_domain *d, int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid) { struct resctrl_staged_config *cfg; - struct rdt_hw_domain *hw_dom; + struct rdt_hw_ctrl_domain *hw_dom; struct msr_param msr_param; + struct rdt_ctrl_domain *d; enum resctrl_conf_type t; - struct rdt_domain *d; int cpu; u32 idx; =20 @@ -308,7 +308,7 @@ int resctrl_arch_update_domains(struct rdt_resource *r,= u32 closid) lockdep_assert_cpus_held(); =20 list_for_each_entry(d, &r->ctrl_domains, hdr.list) { - hw_dom =3D resctrl_to_arch_dom(d); + hw_dom =3D resctrl_to_arch_ctrl_dom(d); msr_param.res =3D NULL; msr_param.dom =3D d; for (t =3D 0; t < CDP_NUM_TYPES; t++) { @@ -432,10 +432,10 @@ ssize_t rdtgroup_schemata_write(struct kernfs_open_fi= le *of, return ret ?: nbytes; } =20 -u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_domain *d, +u32 resctrl_arch_get_config(struct rdt_resource *r, struct rdt_ctrl_domain= *d, u32 closid, enum resctrl_conf_type type) { - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(d); + struct rdt_hw_ctrl_domain *hw_dom =3D resctrl_to_arch_ctrl_dom(d); u32 idx =3D get_config_index(closid, type); =20 return hw_dom->ctrl_val[idx]; @@ -444,7 +444,7 @@ u32 resctrl_arch_get_config(struct rdt_resource *r, str= uct rdt_domain *d, static void show_doms(struct seq_file *s, struct resctrl_schema *schema, i= nt closid) { struct rdt_resource *r =3D schema->res; - struct rdt_domain *dom; + struct rdt_ctrl_domain *dom; bool sep =3D false; u32 ctrl_val; =20 @@ -516,7 +516,7 @@ static int smp_mon_event_count(void *arg) } =20 void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, - struct rdt_domain *d, struct rdtgroup *rdtgrp, + struct rdt_mon_domain *d, struct rdtgroup *rdtgrp, int evtid, int first) { int cpu; @@ -559,11 +559,11 @@ int rdtgroup_mondata_show(struct seq_file *m, void *a= rg) { struct kernfs_open_file *of =3D m->private; struct rdt_domain_hdr *hdr; + struct rdt_mon_domain *d; u32 resid, evtid, domid; struct rdtgroup *rdtgrp; struct rdt_resource *r; union mon_data_bits md; - struct rdt_domain *d; struct rmid_read rr; int ret =3D 0; =20 @@ -584,7 +584,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg) ret =3D -ENOENT; goto out; } - d =3D container_of(hdr, struct rdt_domain, hdr); + d =3D container_of(hdr, struct rdt_mon_domain, hdr); =20 mon_event_read(&rr, r, d, rdtgrp, evtid, false); =20 diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/re= sctrl/monitor.c index b7d831712dc4..08d53ce61d01 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -208,7 +208,7 @@ static int __rmid_read(u32 rmid, enum resctrl_event_id = eventid, u64 *val) return 0; } =20 -static struct arch_mbm_state *get_arch_mbm_state(struct rdt_hw_domain *hw_= dom, +static struct arch_mbm_state *get_arch_mbm_state(struct rdt_hw_mon_domain = *hw_dom, u32 rmid, enum resctrl_event_id eventid) { @@ -227,11 +227,11 @@ static struct arch_mbm_state *get_arch_mbm_state(stru= ct rdt_hw_domain *hw_dom, return NULL; } =20 -void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_domain *d, +void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_mon_domain= *d, u32 unused, u32 rmid, enum resctrl_event_id eventid) { - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(d); + struct rdt_hw_mon_domain *hw_dom =3D resctrl_to_arch_mon_dom(d); struct arch_mbm_state *am; =20 am =3D get_arch_mbm_state(hw_dom, rmid, eventid); @@ -247,9 +247,9 @@ void resctrl_arch_reset_rmid(struct rdt_resource *r, st= ruct rdt_domain *d, * Assumes that hardware counters are also reset and thus that there is * no need to record initial non-zero counts. */ -void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_domain= *d) +void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_mon_do= main *d) { - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(d); + struct rdt_hw_mon_domain *hw_dom =3D resctrl_to_arch_mon_dom(d); =20 if (is_mbm_total_enabled()) memset(hw_dom->arch_mbm_total, 0, @@ -268,12 +268,12 @@ static u64 mbm_overflow_count(u64 prev_msr, u64 cur_m= sr, unsigned int width) return chunks >> shift; } =20 -int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain *d, +int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_mon_domain *= d, u32 unused, u32 rmid, enum resctrl_event_id eventid, u64 *val, void *ignored) { + struct rdt_hw_mon_domain *hw_dom =3D resctrl_to_arch_mon_dom(d); struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(r); - struct rdt_hw_domain *hw_dom =3D resctrl_to_arch_dom(d); struct arch_mbm_state *am; u64 msr_val, chunks; int ret; @@ -319,7 +319,7 @@ static void limbo_release_entry(struct rmid_entry *entr= y) * decrement the count. If the busy count gets to zero on an RMID, we * free the RMID */ -void __check_limbo(struct rdt_domain *d, bool force_free) +void __check_limbo(struct rdt_mon_domain *d, bool force_free) { struct rdt_resource *r =3D &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; u32 idx_limit =3D resctrl_arch_system_num_rmid_idx(); @@ -367,7 +367,7 @@ void __check_limbo(struct rdt_domain *d, bool force_fre= e) resctrl_arch_mon_ctx_free(r, QOS_L3_OCCUP_EVENT_ID, arch_mon_ctx); } =20 -bool has_busy_rmid(struct rdt_domain *d) +bool has_busy_rmid(struct rdt_mon_domain *d) { u32 idx_limit =3D resctrl_arch_system_num_rmid_idx(); =20 @@ -468,7 +468,7 @@ int alloc_rmid(u32 closid) static void add_rmid_to_limbo(struct rmid_entry *entry) { struct rdt_resource *r =3D &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; - struct rdt_domain *d; + struct rdt_mon_domain *d; u32 idx; =20 lockdep_assert_held(&rdtgroup_mutex); @@ -520,7 +520,7 @@ void free_rmid(u32 closid, u32 rmid) list_add_tail(&entry->list, &rmid_free_lru); } =20 -static struct mbm_state *get_mbm_state(struct rdt_domain *d, u32 closid, +static struct mbm_state *get_mbm_state(struct rdt_mon_domain *d, u32 closi= d, u32 rmid, enum resctrl_event_id evtid) { u32 idx =3D resctrl_arch_rmid_idx_encode(closid, rmid); @@ -656,12 +656,12 @@ void mon_event_count(void *info) * throttle MSRs already have low percentage values. To avoid * unnecessarily restricting such rdtgroups, we also increase the bandwidt= h. */ -static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_domain *dom_mb= m) +static void update_mba_bw(struct rdtgroup *rgrp, struct rdt_mon_domain *do= m_mbm) { u32 closid, rmid, cur_msr_val, new_msr_val; struct mbm_state *pmbm_data, *cmbm_data; + struct rdt_ctrl_domain *dom_mba; struct rdt_resource *r_mba; - struct rdt_domain *dom_mba; u32 cur_bw, user_bw, idx; struct list_head *head; struct rdtgroup *entry; @@ -722,7 +722,7 @@ static void update_mba_bw(struct rdtgroup *rgrp, struct= rdt_domain *dom_mbm) resctrl_arch_update_one(r_mba, dom_mba, closid, CDP_NONE, new_msr_val); } =20 -static void mbm_update(struct rdt_resource *r, struct rdt_domain *d, +static void mbm_update(struct rdt_resource *r, struct rdt_mon_domain *d, u32 closid, u32 rmid) { struct rmid_read rr; @@ -780,12 +780,12 @@ static void mbm_update(struct rdt_resource *r, struct= rdt_domain *d, void cqm_handle_limbo(struct work_struct *work) { unsigned long delay =3D msecs_to_jiffies(CQM_LIMBOCHECK_INTERVAL); - struct rdt_domain *d; + struct rdt_mon_domain *d; =20 cpus_read_lock(); mutex_lock(&rdtgroup_mutex); =20 - d =3D container_of(work, struct rdt_domain, cqm_limbo.work); + d =3D container_of(work, struct rdt_mon_domain, cqm_limbo.work); =20 __check_limbo(d, false); =20 @@ -808,7 +808,7 @@ void cqm_handle_limbo(struct work_struct *work) * @exclude_cpu: Which CPU the handler should not run on, * RESCTRL_PICK_ANY_CPU to pick any CPU. */ -void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_m= s, +void cqm_setup_limbo_handler(struct rdt_mon_domain *dom, unsigned long del= ay_ms, int exclude_cpu) { unsigned long delay =3D msecs_to_jiffies(delay_ms); @@ -825,9 +825,9 @@ void mbm_handle_overflow(struct work_struct *work) { unsigned long delay =3D msecs_to_jiffies(MBM_OVERFLOW_INTERVAL); struct rdtgroup *prgrp, *crgrp; + struct rdt_mon_domain *d; struct list_head *head; struct rdt_resource *r; - struct rdt_domain *d; =20 cpus_read_lock(); mutex_lock(&rdtgroup_mutex); @@ -840,7 +840,7 @@ void mbm_handle_overflow(struct work_struct *work) goto out_unlock; =20 r =3D &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; - d =3D container_of(work, struct rdt_domain, mbm_over.work); + d =3D container_of(work, struct rdt_mon_domain, mbm_over.work); =20 list_for_each_entry(prgrp, &rdt_all_groups, rdtgroup_list) { mbm_update(r, d, prgrp->closid, prgrp->mon.rmid); @@ -874,7 +874,7 @@ void mbm_handle_overflow(struct work_struct *work) * @exclude_cpu: Which CPU the handler should not run on, * RESCTRL_PICK_ANY_CPU to pick any CPU. */ -void mbm_setup_overflow_handler(struct rdt_domain *dom, unsigned long dela= y_ms, +void mbm_setup_overflow_handler(struct rdt_mon_domain *dom, unsigned long = delay_ms, int exclude_cpu) { unsigned long delay =3D msecs_to_jiffies(delay_ms); diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cp= u/resctrl/pseudo_lock.c index 2a48eedafe3d..e6e3ad2f8a2e 100644 --- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c +++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c @@ -814,7 +814,7 @@ int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp) * Return: true if @cbm overlaps with pseudo-locked region on @d, false * otherwise. */ -bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned lo= ng cbm) +bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_ctrl_domain *d, unsign= ed long cbm) { unsigned int cbm_len; unsigned long cbm_b; @@ -841,11 +841,11 @@ bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_d= omain *d, unsigned long cbm * if it is not possible to test due to memory allocation issue, * false otherwise. */ -bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d) +bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_ctrl_domain *d) { + struct rdt_ctrl_domain *d_i; cpumask_var_t cpu_with_psl; struct rdt_resource *r; - struct rdt_domain *d_i; bool ret =3D false; =20 /* Walking r->domains, ensure it can't race with cpuhp */ diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index 01ed7bab1002..821c32876cc1 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -92,8 +92,8 @@ void rdt_last_cmd_printf(const char *fmt, ...) =20 void rdt_staged_configs_clear(void) { + struct rdt_ctrl_domain *dom; struct rdt_resource *r; - struct rdt_domain *dom; =20 lockdep_assert_held(&rdtgroup_mutex); =20 @@ -1012,7 +1012,7 @@ static int rdt_bit_usage_show(struct kernfs_open_file= *of, unsigned long sw_shareable =3D 0, hw_shareable =3D 0; unsigned long exclusive =3D 0, pseudo_locked =3D 0; struct rdt_resource *r =3D s->res; - struct rdt_domain *dom; + struct rdt_ctrl_domain *dom; int i, hwb, swb, excl, psl; enum rdtgrp_mode mode; bool sep =3D false; @@ -1243,7 +1243,7 @@ static int rdt_has_sparse_bitmasks_show(struct kernfs= _open_file *of, * * Return: false if CBM does not overlap, true if it does. */ -static bool __rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_dom= ain *d, +static bool __rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_ctr= l_domain *d, unsigned long cbm, int closid, enum resctrl_conf_type type, bool exclusive) { @@ -1298,7 +1298,7 @@ static bool __rdtgroup_cbm_overlaps(struct rdt_resour= ce *r, struct rdt_domain *d * * Return: true if CBM overlap detected, false if there is no overlap */ -bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_domain *d, +bool rdtgroup_cbm_overlaps(struct resctrl_schema *s, struct rdt_ctrl_domai= n *d, unsigned long cbm, int closid, bool exclusive) { enum resctrl_conf_type peer_type =3D resctrl_peer_type(s->conf_type); @@ -1329,10 +1329,10 @@ bool rdtgroup_cbm_overlaps(struct resctrl_schema *s= , struct rdt_domain *d, static bool rdtgroup_mode_test_exclusive(struct rdtgroup *rdtgrp) { int closid =3D rdtgrp->closid; + struct rdt_ctrl_domain *d; struct resctrl_schema *s; struct rdt_resource *r; bool has_cache =3D false; - struct rdt_domain *d; u32 ctrl; =20 /* Walking r->domains, ensure it can't race with cpuhp */ @@ -1448,7 +1448,7 @@ static ssize_t rdtgroup_mode_write(struct kernfs_open= _file *of, * bitmap functions work correctly. */ unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, - struct rdt_domain *d, unsigned long cbm) + struct rdt_ctrl_domain *d, unsigned long cbm) { struct cpu_cacheinfo *ci; unsigned int size =3D 0; @@ -1480,9 +1480,9 @@ static int rdtgroup_size_show(struct kernfs_open_file= *of, { struct resctrl_schema *schema; enum resctrl_conf_type type; + struct rdt_ctrl_domain *d; struct rdtgroup *rdtgrp; struct rdt_resource *r; - struct rdt_domain *d; unsigned int size; int ret =3D 0; u32 closid; @@ -1594,7 +1594,7 @@ static void mon_event_config_read(void *info) mon_info->mon_config =3D msrval & MAX_EVT_CONFIG_BITS; } =20 -static void mondata_config_read(struct rdt_domain *d, struct mon_config_in= fo *mon_info) +static void mondata_config_read(struct rdt_mon_domain *d, struct mon_confi= g_info *mon_info) { smp_call_function_any(&d->hdr.cpu_mask, mon_event_config_read, mon_info, = 1); } @@ -1602,7 +1602,7 @@ static void mondata_config_read(struct rdt_domain *d,= struct mon_config_info *mo static int mbm_config_show(struct seq_file *s, struct rdt_resource *r, u32= evtid) { struct mon_config_info mon_info =3D {0}; - struct rdt_domain *dom; + struct rdt_mon_domain *dom; bool sep =3D false; =20 cpus_read_lock(); @@ -1661,7 +1661,7 @@ static void mon_event_config_write(void *info) } =20 static void mbm_config_write_domain(struct rdt_resource *r, - struct rdt_domain *d, u32 evtid, u32 val) + struct rdt_mon_domain *d, u32 evtid, u32 val) { struct mon_config_info mon_info =3D {0}; =20 @@ -1702,7 +1702,7 @@ static int mon_config_write(struct rdt_resource *r, c= har *tok, u32 evtid) struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(r); char *dom_str =3D NULL, *id_str; unsigned long dom_id, val; - struct rdt_domain *d; + struct rdt_mon_domain *d; =20 /* Walking r->domains, ensure it can't race with cpuhp */ lockdep_assert_cpus_held(); @@ -2261,9 +2261,9 @@ static inline bool is_mba_linear(void) static int set_cache_qos_cfg(int level, bool enable) { void (*update)(void *arg); + struct rdt_ctrl_domain *d; struct rdt_resource *r_l; cpumask_var_t cpu_mask; - struct rdt_domain *d; int cpu; =20 /* Walking r->domains, ensure it can't race with cpuhp */ @@ -2313,7 +2313,7 @@ void rdt_domain_reconfigure_cdp(struct rdt_resource *= r) l3_qos_cfg_update(&hw_res->cdp_enabled); } =20 -static int mba_sc_domain_allocate(struct rdt_resource *r, struct rdt_domai= n *d) +static int mba_sc_domain_allocate(struct rdt_resource *r, struct rdt_ctrl_= domain *d) { u32 num_closid =3D resctrl_arch_get_num_closid(r); int cpu =3D cpumask_any(&d->hdr.cpu_mask); @@ -2331,7 +2331,7 @@ static int mba_sc_domain_allocate(struct rdt_resource= *r, struct rdt_domain *d) } =20 static void mba_sc_domain_destroy(struct rdt_resource *r, - struct rdt_domain *d) + struct rdt_ctrl_domain *d) { kfree(d->mbps_val); d->mbps_val =3D NULL; @@ -2357,7 +2357,7 @@ static int set_mba_sc(bool mba_sc) { struct rdt_resource *r =3D &rdt_resources_all[RDT_RESOURCE_MBA].r_resctrl; u32 num_closid =3D resctrl_arch_get_num_closid(r); - struct rdt_domain *d; + struct rdt_ctrl_domain *d; int i; =20 if (!supports_mba_mbps() || mba_sc =3D=3D is_mba_sc(r)) @@ -2629,7 +2629,7 @@ static int rdt_get_tree(struct fs_context *fc) { struct rdt_fs_context *ctx =3D rdt_fc2context(fc); unsigned long flags =3D RFTYPE_CTRL_BASE; - struct rdt_domain *dom; + struct rdt_mon_domain *dom; struct rdt_resource *r; int ret; =20 @@ -2814,9 +2814,9 @@ static int rdt_init_fs_context(struct fs_context *fc) static int reset_all_ctrls(struct rdt_resource *r) { struct rdt_hw_resource *hw_res =3D resctrl_to_arch_res(r); - struct rdt_hw_domain *hw_dom; + struct rdt_hw_ctrl_domain *hw_dom; struct msr_param msr_param; - struct rdt_domain *d; + struct rdt_ctrl_domain *d; int cpu; int i; =20 @@ -2833,7 +2833,7 @@ static int reset_all_ctrls(struct rdt_resource *r) * from each domain to update the MSRs below. */ list_for_each_entry(d, &r->ctrl_domains, hdr.list) { - hw_dom =3D resctrl_to_arch_dom(d); + hw_dom =3D resctrl_to_arch_ctrl_dom(d); cpu =3D cpumask_any(&d->hdr.cpu_mask); =20 for (i =3D 0; i < hw_res->num_closid; i++) @@ -3027,7 +3027,7 @@ static void rmdir_mondata_subdir_allrdtgrp(struct rdt= _resource *r, } =20 static int mkdir_mondata_subdir(struct kernfs_node *parent_kn, - struct rdt_domain *d, + struct rdt_mon_domain *d, struct rdt_resource *r, struct rdtgroup *prgrp) { union mon_data_bits priv; @@ -3076,7 +3076,7 @@ static int mkdir_mondata_subdir(struct kernfs_node *p= arent_kn, * and "monitor" groups with given domain id. */ static void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r, - struct rdt_domain *d) + struct rdt_mon_domain *d) { struct kernfs_node *parent_kn; struct rdtgroup *prgrp, *crgrp; @@ -3098,7 +3098,7 @@ static int mkdir_mondata_subdir_alldom(struct kernfs_= node *parent_kn, struct rdt_resource *r, struct rdtgroup *prgrp) { - struct rdt_domain *dom; + struct rdt_mon_domain *dom; int ret; =20 /* Walking r->domains, ensure it can't race with cpuhp */ @@ -3203,7 +3203,7 @@ static u32 cbm_ensure_valid(u32 _val, struct rdt_reso= urce *r) * Set the RDT domain up to start off with all usable allocations. That is, * all shareable and unused bits. All-zero CBM is invalid. */ -static int __init_one_rdt_domain(struct rdt_domain *d, struct resctrl_sche= ma *s, +static int __init_one_rdt_domain(struct rdt_ctrl_domain *d, struct resctrl= _schema *s, u32 closid) { enum resctrl_conf_type peer_type =3D resctrl_peer_type(s->conf_type); @@ -3283,7 +3283,7 @@ static int __init_one_rdt_domain(struct rdt_domain *d= , struct resctrl_schema *s, */ static int rdtgroup_init_cat(struct resctrl_schema *s, u32 closid) { - struct rdt_domain *d; + struct rdt_ctrl_domain *d; int ret; =20 list_for_each_entry(d, &s->res->ctrl_domains, hdr.list) { @@ -3299,7 +3299,7 @@ static int rdtgroup_init_cat(struct resctrl_schema *s= , u32 closid) static void rdtgroup_init_mba(struct rdt_resource *r, u32 closid) { struct resctrl_staged_config *cfg; - struct rdt_domain *d; + struct rdt_ctrl_domain *d; =20 list_for_each_entry(d, &r->ctrl_domains, hdr.list) { if (is_mba_sc(r)) { @@ -3925,14 +3925,14 @@ static void __init rdtgroup_setup_default(void) mutex_unlock(&rdtgroup_mutex); } =20 -static void domain_destroy_mon_state(struct rdt_domain *d) +static void domain_destroy_mon_state(struct rdt_mon_domain *d) { bitmap_free(d->rmid_busy_llc); kfree(d->mbm_total); kfree(d->mbm_local); } =20 -void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_domain= *d) +void resctrl_offline_ctrl_domain(struct rdt_resource *r, struct rdt_ctrl_d= omain *d) { mutex_lock(&rdtgroup_mutex); =20 @@ -3942,7 +3942,7 @@ void resctrl_offline_ctrl_domain(struct rdt_resource = *r, struct rdt_domain *d) mutex_unlock(&rdtgroup_mutex); } =20 -void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_domain = *d) +void resctrl_offline_mon_domain(struct rdt_resource *r, struct rdt_mon_dom= ain *d) { mutex_lock(&rdtgroup_mutex); =20 @@ -3973,7 +3973,7 @@ void resctrl_offline_mon_domain(struct rdt_resource *= r, struct rdt_domain *d) mutex_unlock(&rdtgroup_mutex); } =20 -static int domain_setup_mon_state(struct rdt_resource *r, struct rdt_domai= n *d) +static int domain_setup_mon_state(struct rdt_resource *r, struct rdt_mon_d= omain *d) { u32 idx_limit =3D resctrl_arch_system_num_rmid_idx(); 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a="3495553" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="3495553" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2024 11:37:20 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="7485398" 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; 28 Feb 2024 11:37:20 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , Drew Fustini , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v15 5/8] x86/resctrl: Add node-scope to the options for feature scope Date: Wed, 28 Feb 2024 11:37:00 -0800 Message-ID: <20240228193717.8170-7-tony.luck@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240228112935.8087-tony.luck@intel.com> References: <20240228112215.8044-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" Currently supported resctrl features are all domain scoped the same as the scope of the L2 or L3 caches. Add RESCTRL_NODE as a new option for features that are scoped at the same granularity as NUMA nodes. This is needed for Intel's Sub-NUMA Cluster (SNC) feature where monitoring features are node scoped. Signed-off-by: Tony Luck --- include/linux/resctrl.h | 1 + arch/x86/kernel/cpu/resctrl/core.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 1a4ac60522bb..87b360e87215 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -176,6 +176,7 @@ struct resctrl_schema; enum resctrl_scope { RESCTRL_L2_CACHE =3D 2, RESCTRL_L3_CACHE =3D 3, + RESCTRL_NODE, }; =20 /** diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index cd58c9d4710f..c34ce367c456 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -510,6 +510,8 @@ static int get_domain_id_from_scope(int cpu, enum resct= rl_scope scope) case RESCTRL_L2_CACHE: case RESCTRL_L3_CACHE: return get_cpu_cacheinfo_id(cpu, scope); + case RESCTRL_NODE: + return cpu_to_node(cpu); default: break; } --=20 2.43.0 From nobody Sat Feb 7 21:08:21 2026 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 433FE1649BE; Wed, 28 Feb 2024 19:37:25 +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=1709149047; cv=none; b=tsWmXR4DhCcuq6QqV+u3yd+MSGwqDb3797C+KKDb4ElEeL/u9Bod5zZcYxmqzz0uI3zOfnJbCssoTi2X0SUkvPxvPRi7WXGYGTup6m2oMnhbufUOXQdAwuGd1cQIURQR/wQQYBjb+OLRBMHFVUhjfjJOY/ZxvKwGaj03dO48DIo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709149047; c=relaxed/simple; bh=GZ6Fxz5NTAguSBgG4QB2OlKuE6tlPVQE9QuNQQhOdSs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SjEB/DemExJmykHKVfG6BzIpZ1WmcWgJVlUuF8Mse8eEcW5GDQrtL7OXfjoSAqTun1X+JEWyzFe3+BHm4FHYcb0eZvqv809Gd5ACTPJskEu+xHLXKM8p/Sk3al+lNmVaghKVbnJKa/mqMqRI/BjcyR0hGsjZ7Yb6TIXWKdx91rc= 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=ZI9QMy5c; 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="ZI9QMy5c" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1709149046; x=1740685046; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GZ6Fxz5NTAguSBgG4QB2OlKuE6tlPVQE9QuNQQhOdSs=; b=ZI9QMy5cT+3gTuHSn4LfZll8lQ44//k4XIcWNwyo8n74C15IbuzJKW/p HQXf6d6gbrIudNf51D23jG7NozvWnBYLYhUkfDq5KwakC3udLVONUGXRL ut7y5tNUcrOjIULdL6CPVeyjw+t0l0RdjQe3t/pycAuZiLoYgxfw+uRwN Ep6rHGznxARwuKYBO8QALCoS2lzKHaE0bXaewPc3+YYD7PcXtQw+PDQA8 hS1ABxZ1SjagvucwFmQmQJJ1HQkehULEG0a5hcYhoMN/tWUVotQwxZCO/ 4NtKG1e3KnJWGh7+AEB+b2wqwXt6Lj/laCOaXEIhEB9GR4iwLoCmdT1r+ Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10998"; a="3495561" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="3495561" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2024 11:37:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="7485401" 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; 28 Feb 2024 11:37:20 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , Drew Fustini , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v15 6/8] x86/resctrl: Introduce snc_nodes_per_l3_cache Date: Wed, 28 Feb 2024 11:37:01 -0800 Message-ID: <20240228193717.8170-8-tony.luck@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240228112935.8087-tony.luck@intel.com> References: <20240228112215.8044-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" Intel Sub-NUMA Cluster (SNC) is a feature that subdivides the CPU cores and memory controllers on a socket into two or more groups. These are presented to the operating system as NUMA nodes. This may enable some workloads to have slightly lower latency to memory as the memory controller(s) in an SNC node are electrically closer to the CPU cores on that SNC node. This cost may be offset by lower bandwidth since the memory accesses for each core can only be interleaved between the memory controllers on the same SNC node. Resctrl monitoring on an Intel system depends upon attaching RMIDs to tasks to track L3 cache occupancy and memory bandwidth. There is an MSR that controls how the RMIDs are shared between SNC nodes. The default mode divides them numerically. E.g. when there are two SNC nodes on a socket the lower number half of the RMIDs are given to the first node, the remainder to the second node. This would be difficult to use with the Linux resctrl interface as specific RMID values assigned to resctrl groups are not visible to users. The other mode divides the RMIDs and renumbers the ones on the second SNC node to start from zero. Even with this renumbering SNC mode requires several changes in resctrl behavior for correct operation. Add a global integer "snc_nodes_per_l3_cache" that shows how many SNC nodes share each L3 cache. When "snc_nodes_per_l3_cache" is "1", SNC mode is either not implemented, or not enabled. Update all places to take appropriate action when SNC mode is enabled: 1) The number of logical RMIDs per L3 cache available for use is the number of physical RMIDs divided by the number of SNC nodes. 2) Likewise the "mon_scale" value must be divided by the number of SNC nodes. 3) The RMID renumbering operates when using the value from the IA32_PQR_ASSOC MSR to count accesses by a task. When reading an RMID counter, adjust from the logical RMID to the physical RMID value for the SNC node that it wishes to read and load the adjusted value into the IA32_QM_EVTSEL MSR. 4) Divide the L3 cache between the SNC nodes. Divide the value reported in the resctrl "size" file by the number of SNC nodes because the effective amount of cache that can be allocated is reduced by that factor. 5) Disable the "-o mba_MBps" mount option in SNC mode because the monitoring is being done per SNC node, while the bandwidth allocation is still done at the L3 cache scope. Trying to use this feedback loop might result in contradictory changes to the throttling level coming from each of the SNC node bandwidth measurements. Signed-off-by: Tony Luck --- arch/x86/kernel/cpu/resctrl/internal.h | 2 ++ arch/x86/kernel/cpu/resctrl/core.c | 6 ++++++ arch/x86/kernel/cpu/resctrl/monitor.c | 16 +++++++++++++--- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 5 +++-- 4 files changed, 24 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/r= esctrl/internal.h index 41a093feb744..786035eff7fb 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -483,6 +483,8 @@ extern struct rdt_hw_resource rdt_resources_all[]; extern struct rdtgroup rdtgroup_default; extern struct dentry *debugfs_resctrl; =20 +extern unsigned int snc_nodes_per_l3_cache; + enum resctrl_res_level { RDT_RESOURCE_L3, RDT_RESOURCE_L2, diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index c34ce367c456..cb181796f73b 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -331,6 +331,12 @@ static u32 delay_bw_map(unsigned long bw, struct rdt_r= esource *r) return r->default_ctrl; } =20 +/* + * Number of SNC nodes that share each L3 cache. Default is 1 for + * systems that do not support SNC, or have SNC disabled. + */ +unsigned int snc_nodes_per_l3_cache =3D 1; + static void mba_wrmsr_intel(struct msr_param *m) { struct rdt_hw_ctrl_domain *hw_dom =3D resctrl_to_arch_ctrl_dom(m->dom); diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/re= sctrl/monitor.c index 08d53ce61d01..87badcec2834 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -186,8 +186,18 @@ static inline struct rmid_entry *__rmid_entry(u32 idx) =20 static int __rmid_read(u32 rmid, enum resctrl_event_id eventid, u64 *val) { + struct rdt_resource *r =3D &rdt_resources_all[RDT_RESOURCE_L3].r_resctrl; + int cpu =3D smp_processor_id(); + int rmid_offset =3D 0; u64 msr_val; =20 + /* + * When SNC mode is on, need to compute the offset to read the + * physical RMID counter for the node to which this CPU belongs. + */ + if (snc_nodes_per_l3_cache > 1) + rmid_offset =3D (cpu_to_node(cpu) % snc_nodes_per_l3_cache) * r->num_rmi= d; + /* * As per the SDM, when IA32_QM_EVTSEL.EvtID (bits 7:0) is configured * with a valid event code for supported resource type and the bits @@ -196,7 +206,7 @@ static int __rmid_read(u32 rmid, enum resctrl_event_id = eventid, u64 *val) * IA32_QM_CTR.Error (bit 63) and IA32_QM_CTR.Unavailable (bit 62) * are error bits. */ - wrmsr(MSR_IA32_QM_EVTSEL, eventid, rmid); + wrmsr(MSR_IA32_QM_EVTSEL, eventid, rmid + rmid_offset); rdmsrl(MSR_IA32_QM_CTR, msr_val); =20 if (msr_val & RMID_VAL_ERROR) @@ -1011,8 +1021,8 @@ int __init rdt_get_mon_l3_config(struct rdt_resource = *r) int ret; =20 resctrl_rmid_realloc_limit =3D boot_cpu_data.x86_cache_size * 1024; - hw_res->mon_scale =3D boot_cpu_data.x86_cache_occ_scale; - r->num_rmid =3D boot_cpu_data.x86_cache_max_rmid + 1; + hw_res->mon_scale =3D boot_cpu_data.x86_cache_occ_scale / snc_nodes_per_l= 3_cache; + r->num_rmid =3D (boot_cpu_data.x86_cache_max_rmid + 1) / snc_nodes_per_l3= _cache; hw_res->mbm_width =3D MBM_CNTR_WIDTH_BASE; =20 if (mbm_offset > 0 && mbm_offset <=3D MBM_CNTR_WIDTH_OFFSET_MAX) diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/r= esctrl/rdtgroup.c index 821c32876cc1..1afc64bf46fa 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1466,7 +1466,7 @@ unsigned int rdtgroup_cbm_to_size(struct rdt_resource= *r, } } =20 - return size; 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28 Feb 2024 11:37:20 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , Drew Fustini , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v15 7/8] x86/resctrl: Sub NUMA Cluster detection and enable Date: Wed, 28 Feb 2024 11:37:02 -0800 Message-ID: <20240228193717.8170-9-tony.luck@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240228112935.8087-tony.luck@intel.com> References: <20240228112215.8044-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" There isn't a simple hardware bit that indicates whether a CPU is running in Sub NUMA Cluster (SNC) mode. Infer the state by comparing the ratio of NUMA nodes to L3 cache instances. When SNC mode is detected, reconfigure the RMID counters by updating the MSR_RMID_SNC_CONFIG MSR on each socket as CPUs are seen. Clearing bit zero of the MSR divides the RMIDs and renumbers the ones on the second SNC node to start from zero. Signed-off-by: Tony Luck --- arch/x86/include/asm/msr-index.h | 1 + arch/x86/kernel/cpu/resctrl/core.c | 119 +++++++++++++++++++++++++++++ 2 files changed, 120 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-in= dex.h index f1bd7b91b3c6..f6ba7d0397b8 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -1119,6 +1119,7 @@ #define MSR_IA32_QM_CTR 0xc8e #define MSR_IA32_PQR_ASSOC 0xc8f #define MSR_IA32_L3_CBM_BASE 0xc90 +#define MSR_RMID_SNC_CONFIG 0xca0 #define MSR_IA32_L2_CBM_BASE 0xd10 #define MSR_IA32_MBA_THRTL_BASE 0xd50 =20 diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resct= rl/core.c index cb181796f73b..65cec8c45047 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -21,7 +21,9 @@ #include #include #include +#include =20 +#include #include #include #include "internal.h" @@ -744,11 +746,42 @@ static void clear_closid_rmid(int cpu) RESCTRL_RESERVED_CLOSID); } =20 +/* + * The power-on reset value of MSR_RMID_SNC_CONFIG is 0x1 + * which indicates that RMIDs are configured in legacy mode. + * This mode is incompatible with Linux resctrl semantics + * as RMIDs are partitioned between SNC nodes, which requires + * a user to know which RMID is allocated to a task. + * Clearing bit 0 reconfigures the RMID counters for use + * in Sub NUMA Cluster mode. This mode is better for Linux. + * The RMID space is divided between all SNC nodes with the + * RMIDs renumbered to start from zero in each node when + * couning operations from tasks. Code to read the counters + * must adjust RMID counter numbers based on SNC node. See + * __rmid_read() for code that does this. + */ +static void snc_remap_rmids(int cpu) +{ + u64 val; + + /* Only need to enable once per package. */ + if (cpumask_first(topology_core_cpumask(cpu)) !=3D cpu) + return; + + rdmsrl(MSR_RMID_SNC_CONFIG, val); + val &=3D ~BIT_ULL(0); + wrmsrl(MSR_RMID_SNC_CONFIG, val); +} + static int resctrl_arch_online_cpu(unsigned int cpu) { struct rdt_resource *r; =20 mutex_lock(&domain_list_lock); + + if (snc_nodes_per_l3_cache > 1) + snc_remap_rmids(cpu); + for_each_capable_rdt_resource(r) domain_add_cpu(cpu, r); mutex_unlock(&domain_list_lock); @@ -988,11 +1021,97 @@ static __init bool get_rdt_resources(void) return (rdt_mon_capable || rdt_alloc_capable); } =20 +/* CPU models that support MSR_RMID_SNC_CONFIG */ +static const struct x86_cpu_id snc_cpu_ids[] __initconst =3D { + X86_MATCH_INTEL_FAM6_MODEL(ICELAKE_X, 0), + X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X, 0), + X86_MATCH_INTEL_FAM6_MODEL(EMERALDRAPIDS_X, 0), + X86_MATCH_INTEL_FAM6_MODEL(GRANITERAPIDS_X, 0), + X86_MATCH_INTEL_FAM6_MODEL(ATOM_CRESTMONT_X, 0), + {} +}; + +/* + * There isn't a simple hardware bit that indicates whether a CPU is runni= ng + * in Sub NUMA Cluster (SNC) mode. Infer the state by comparing the + * ratio of NUMA nodes to L3 cache instances. + * It is not possible to accurately determine SNC state if the system is + * booted with a maxcpus=3DN parameter. That distorts the ratio of SNC nod= es + * to L3 caches. It will be OK if system is booted with hyperthreading + * disabled (since this doesn't affect the ratio). + */ +static __init int snc_get_config(void) +{ + unsigned long *node_caches; + int mem_only_nodes =3D 0; + int cpu, node, ret; + int num_l3_caches; + int cache_id; + + if (!x86_match_cpu(snc_cpu_ids)) + return 1; + + node_caches =3D bitmap_zalloc(num_possible_cpus(), GFP_KERNEL); + if (!node_caches) + return 1; + + cpus_read_lock(); + + if (num_online_cpus() !=3D num_present_cpus()) + pr_warn("Some CPUs offline, SNC detection may be incorrect\n"); + + for_each_node(node) { + cpu =3D cpumask_first(cpumask_of_node(node)); + if (cpu < nr_cpu_ids) { + cache_id =3D get_cpu_cacheinfo_id(cpu, 3); + if (cache_id !=3D -1) + set_bit(cache_id, node_caches); + } else { + mem_only_nodes++; + } + } + cpus_read_unlock(); + + num_l3_caches =3D bitmap_weight(node_caches, num_possible_cpus()); + kfree(node_caches); + + if (!num_l3_caches) + goto insane; + + /* sanity check #1: Number of CPU nodes must be multiple of num_l3_caches= */ + if ((nr_node_ids - mem_only_nodes) % num_l3_caches) + goto insane; + + ret =3D (nr_node_ids - mem_only_nodes) / num_l3_caches; + + /* sanity check #2: Only valid results are 1, 2, 3, 4 */ + switch (ret) { + case 1: + break; + case 2: + case 3: + case 4: + pr_info("Sub-NUMA cluster detected with %d nodes per L3 cache\n", ret); + rdt_resources_all[RDT_RESOURCE_L3].r_resctrl.mon_scope =3D RESCTRL_NODE; + break; + default: + goto insane; + } + + return ret; +insane: + pr_warn("SNC insanity: CPU nodes =3D %d num_l3_caches =3D %d\n", + (nr_node_ids - mem_only_nodes), num_l3_caches); + return 1; +} + static __init void rdt_init_res_defs_intel(void) { struct rdt_hw_resource *hw_res; struct rdt_resource *r; =20 + snc_nodes_per_l3_cache =3D snc_get_config(); + for_each_rdt_resource(r) { hw_res =3D resctrl_to_arch_res(r); =20 --=20 2.43.0 From nobody Sat Feb 7 21:08:21 2026 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 909F06FD00; 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a="3495589" X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="3495589" Received: from orviesa010.jf.intel.com ([10.64.159.150]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 28 Feb 2024 11:37:21 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.06,191,1705392000"; d="scan'208";a="7485407" 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; 28 Feb 2024 11:37:21 -0800 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , Drew Fustini , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v15 8/8] x86/resctrl: Update documentation with Sub-NUMA cluster changes Date: Wed, 28 Feb 2024 11:37:03 -0800 Message-ID: <20240228193717.8170-10-tony.luck@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240228112935.8087-tony.luck@intel.com> References: <20240228112215.8044-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" With Sub-NUMA Cluster mode enabled the scope of monitoring resources is per-NODE instead of per-L3 cache. Suffixes of directories with "L3" in their name refer to Sub-NUMA nodes instead of L3 cache ids. Users should be aware that SNC mode also affects the amount of L3 cache available for allocation within each SNC node. Signed-off-by: Tony Luck --- Documentation/arch/x86/resctrl.rst | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/Documentation/arch/x86/resctrl.rst b/Documentation/arch/x86/re= sctrl.rst index a6279df64a9d..15f1cff6ee76 100644 --- a/Documentation/arch/x86/resctrl.rst +++ b/Documentation/arch/x86/resctrl.rst @@ -366,10 +366,10 @@ When control is enabled all CTRL_MON groups will also= contain: When monitoring is enabled all MON groups will also contain: =20 "mon_data": - This contains a set of files organized by L3 domain and by - RDT event. E.g. on a system with two L3 domains there will - be subdirectories "mon_L3_00" and "mon_L3_01". Each of these - directories have one file per event (e.g. "llc_occupancy", + This contains a set of files organized by L3 domain or by NUMA + node (depending on whether Sub-NUMA Cluster (SNC) mode is disabled + or enabled respectively) and by RDT event. Each of these + directories has one file per event (e.g. "llc_occupancy", "mbm_total_bytes", and "mbm_local_bytes"). In a MON group these files provide a read out of the current value of the event for all tasks in the group. In CTRL_MON groups these files provide @@ -478,6 +478,23 @@ if non-contiguous 1s value is supported. On a system w= ith a 20-bit mask each bit represents 5% of the capacity of the cache. You could partition the cache into four equal parts with masks: 0x1f, 0x3e0, 0x7c00, 0xf8000. =20 +Notes on Sub-NUMA Cluster mode +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D +When SNC mode is enabled, Linux may load balance tasks between Sub-NUMA +nodes much more readily than between regular NUMA nodes since the CPUs +on Sub-NUMA nodes share the same L3 cache and the system may report +the NUMA distance between Sub-NUMA nodes with a lower value than used +for regular NUMA nodes. Users who do not bind tasks to the CPUs of a +specific Sub-NUMA node must read the "llc_occupancy", "mbm_total_bytes", +and "mbm_local_bytes" for all Sub-NUMA nodes where the tasks may execute +to get the full view of traffic for which the tasks were the source. + +The cache allocation feature still provides the same number of +bits in a mask to control allocation into the L3 cache, but each +of those ways has its capacity reduced because the cache is divided +between the SNC nodes. The values reported in the resctrl +"size" files are adjusted accordingly. + Memory bandwidth Allocation and monitoring =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 --=20 2.43.0