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[23.128.96.18]) by mx.google.com with ESMTP id rk21si12103278ejb.212.2021.06.14.13.14.21; Mon, 14 Jun 2021 13:14:43 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=arm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235313AbhFNUMj (ORCPT + 99 others); Mon, 14 Jun 2021 16:12:39 -0400 Received: from foss.arm.com ([217.140.110.172]:45694 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235208AbhFNUMd (ORCPT ); Mon, 14 Jun 2021 16:12:33 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 212CE12FC; Mon, 14 Jun 2021 13:10:25 -0700 (PDT) Received: from merodach.members.linode.com (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 3DFA03F694; Mon, 14 Jun 2021 13:10:23 -0700 (PDT) From: James Morse To: x86@kernel.org, linux-kernel@vger.kernel.org Cc: Fenghua Yu , Reinette Chatre , Thomas Gleixner , Ingo Molnar , Borislav Petkov , H Peter Anvin , Babu Moger , James Morse , shameerali.kolothum.thodi@huawei.com, Jamie Iles , D Scott Phillips OS , lcherian@marvell.com Subject: [PATCH v4 11/24] x86/resctrl: Move the schemata names into struct resctrl_schema Date: Mon, 14 Jun 2021 20:09:28 +0000 Message-Id: <20210614200941.12383-12-james.morse@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210614200941.12383-1-james.morse@arm.com> References: <20210614200941.12383-1-james.morse@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org resctrl 'info' directories and schema parsing use the schema name. This lives in the struct rdt_resource, and is specified by the architecture code. Once the CDP resources are merged, there will only be one resource (and one name) in use by two schema. To allow the CDP CODE/DATA property to be the tyoe of configuration the schema uses, the name should also be per-schema. Add a name field to struct resctrl_schema, and use this wherever the schema name is exposed (or read from) user-space. Calculating max_name_width for padding the schemata file also moves as this is visible to user-space. As the names in struct rdt_resource already include the CDP information, schemata_list_create() copies them. Reviewed-by: Jamie Iles Signed-off-by: James Morse --- Changes since v3: * Remvoed a space, Changes since v2: * Shuffled commit message, Changes since v1: * Don't hardcode max_name_width, that leads to bugs * Move max_name_width to live with the code that will generate the name. * Fixed name/names typo --- arch/x86/kernel/cpu/resctrl/core.c | 5 ----- arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 10 +++------- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 19 +++++++++++++++---- include/linux/resctrl.h | 2 ++ 4 files changed, 20 insertions(+), 16 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c index b406cca56ed4..be974517ba0d 100644 --- a/arch/x86/kernel/cpu/resctrl/core.c +++ b/arch/x86/kernel/cpu/resctrl/core.c @@ -778,13 +778,8 @@ static int resctrl_offline_cpu(unsigned int cpu) static __init void rdt_init_padding(void) { struct rdt_resource *r; - int cl; for_each_alloc_capable_rdt_resource(r) { - cl = strlen(r->name); - if (cl > max_name_width) - max_name_width = cl; - if (r->data_width > max_data_width) max_data_width = r->data_width; } diff --git a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c index 4428ec499037..57c2b0e121d2 100644 --- a/arch/x86/kernel/cpu/resctrl/ctrlmondata.c +++ b/arch/x86/kernel/cpu/resctrl/ctrlmondata.c @@ -290,11 +290,9 @@ static int rdtgroup_parse_resource(char *resname, char *tok, struct rdtgroup *rdtgrp) { struct resctrl_schema *s; - struct rdt_resource *r; list_for_each_entry(s, &resctrl_schema_all, list) { - r = s->res; - if (!strcmp(resname, r->name) && rdtgrp->closid < s->num_closid) + if (!strcmp(resname, s->name) && rdtgrp->closid < s->num_closid) return parse_line(tok, s, rdtgrp); } rdt_last_cmd_printf("Unknown or unsupported resource name '%s'\n", resname); @@ -388,7 +386,7 @@ static void show_doms(struct seq_file *s, struct resctrl_schema *schema, int clo bool sep = false; u32 ctrl_val; - seq_printf(s, "%*s:", max_name_width, r->name); + seq_printf(s, "%*s:", max_name_width, schema->name); list_for_each_entry(dom, &r->domains, list) { hw_dom = resctrl_to_arch_dom(dom); if (sep) @@ -408,7 +406,6 @@ int rdtgroup_schemata_show(struct kernfs_open_file *of, { struct resctrl_schema *schema; struct rdtgroup *rdtgrp; - struct rdt_resource *r; int ret = 0; u32 closid; @@ -416,8 +413,7 @@ int rdtgroup_schemata_show(struct kernfs_open_file *of, if (rdtgrp) { if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP) { list_for_each_entry(schema, &resctrl_schema_all, list) { - r = schema->res; - seq_printf(s, "%s:uninitialized\n", r->name); + seq_printf(s, "%s:uninitialized\n", schema->name); } } else if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKED) { if (!rdtgrp->plr->d) { diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index eaad9c8e6c04..5551331ac94e 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1439,7 +1439,7 @@ static int rdtgroup_size_show(struct kernfs_open_file *of, ret = -ENODEV; } else { seq_printf(s, "%*s:", max_name_width, - rdtgrp->plr->s->res->name); + rdtgrp->plr->s->name); size = rdtgroup_cbm_to_size(rdtgrp->plr->s->res, rdtgrp->plr->d, rdtgrp->plr->cbm); @@ -1451,7 +1451,7 @@ static int rdtgroup_size_show(struct kernfs_open_file *of, list_for_each_entry(schema, &resctrl_schema_all, list) { r = schema->res; sep = false; - seq_printf(s, "%*s:", max_name_width, r->name); + seq_printf(s, "%*s:", max_name_width, schema->name); list_for_each_entry(d, &r->domains, list) { hw_dom = resctrl_to_arch_dom(d); if (sep) @@ -1823,7 +1823,7 @@ static int rdtgroup_create_info_dir(struct kernfs_node *parent_kn) list_for_each_entry(s, &resctrl_schema_all, list) { r = s->res; fflags = r->fflags | RF_CTRL_INFO; - ret = rdtgroup_mkdir_info_resdir(s, r->name, fflags); + ret = rdtgroup_mkdir_info_resdir(s, s->name, fflags); if (ret) goto out_destroy; } @@ -2128,6 +2128,7 @@ static int schemata_list_create(void) { struct resctrl_schema *s; struct rdt_resource *r; + int ret, cl; for_each_alloc_enabled_rdt_resource(r) { s = kzalloc(sizeof(*s), GFP_KERNEL); @@ -2138,6 +2139,16 @@ static int schemata_list_create(void) s->conf_type = resctrl_to_arch_res(r)->conf_type; s->num_closid = resctrl_arch_get_num_closid(r); + ret = snprintf(s->name, sizeof(s->name), r->name); + if (ret >= sizeof(s->name)) { + kfree(s); + return -EINVAL; + } + + cl = strlen(s->name); + if (cl > max_name_width) + max_name_width = cl; + INIT_LIST_HEAD(&s->list); list_add(&s->list, &resctrl_schema_all); } @@ -2771,7 +2782,7 @@ static int __init_one_rdt_domain(struct rdt_domain *d, struct resctrl_schema *s, */ tmp_cbm = d->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", r->name, d->id); + rdt_last_cmd_printf("No space on %s:%d\n", s->name, d->id); return -ENOSPC; } d->have_new_ctrl = true; diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 6c9e9692eaba..8fa806c85cec 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -167,6 +167,7 @@ struct rdt_resource { * struct resctrl_schema - configuration abilities of a resource presented to * user-space * @list: Member of resctrl_schema_all. + * @name: The name to use in the "schemata" file. * @conf_type: Whether this schema is specific to code/data. * @res: The resource structure exported by the architecture to describe * the hardware that is configured by this schema. @@ -176,6 +177,7 @@ struct rdt_resource { */ struct resctrl_schema { struct list_head list; + char name[8]; enum resctrl_conf_type conf_type; struct rdt_resource *res; u32 num_closid; -- 2.30.2