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From: Babu Moger <babu.moger@amd.com>
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Subject: [PATCH v4 03/19] x86/resctrl: Consolidate monitoring related data from rdt_resource
Date: Fri, 24 May 2024 07:23:22 -0500
Message-ID: <8f73c9ec4c9999c262d9297d46a03209a8affe3f.1716552602.git.babu.moger@amd.com>
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Consolidate all the data related to monitoring into separate structure
for better readability.

Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
---
v4: New patch.
---
 arch/x86/kernel/cpu/resctrl/core.c     |  2 +-
 arch/x86/kernel/cpu/resctrl/monitor.c  | 16 ++++++++--------
 arch/x86/kernel/cpu/resctrl/rdtgroup.c |  8 ++++----
 include/linux/resctrl.h                | 16 ++++++++++++----
 4 files changed, 25 insertions(+), 17 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index df1b43fd9f0e..6cf3c887c693 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -535,7 +535,7 @@ static void domain_add_cpu(int cpu, struct rdt_resource *r)
 		return;
 	}
 
-	if (r->mon_capable && arch_domain_mbm_alloc(r->num_rmid, hw_dom)) {
+	if (r->mon_capable && arch_domain_mbm_alloc(r->mon.num_rmid, hw_dom)) {
 		domain_free(hw_dom);
 		return;
 	}
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index 2345e6836593..b35d04fc761b 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -254,11 +254,11 @@ void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_domain *d)
 
 	if (is_mbm_total_enabled())
 		memset(hw_dom->arch_mbm_total, 0,
-		       sizeof(*hw_dom->arch_mbm_total) * r->num_rmid);
+		       sizeof(*hw_dom->arch_mbm_total) * r->mon.num_rmid);
 
 	if (is_mbm_local_enabled())
 		memset(hw_dom->arch_mbm_local, 0,
-		       sizeof(*hw_dom->arch_mbm_local) * r->num_rmid);
+		       sizeof(*hw_dom->arch_mbm_local) * r->mon.num_rmid);
 }
 
 static u64 mbm_overflow_count(u64 prev_msr, u64 cur_msr, unsigned int width)
@@ -1004,14 +1004,14 @@ static struct mon_evt mbm_local_event = {
  */
 static void l3_mon_evt_init(struct rdt_resource *r)
 {
-	INIT_LIST_HEAD(&r->evt_list);
+	INIT_LIST_HEAD(&r->mon.evt_list);
 
 	if (is_llc_occupancy_enabled())
-		list_add_tail(&llc_occupancy_event.list, &r->evt_list);
+		list_add_tail(&llc_occupancy_event.list, &r->mon.evt_list);
 	if (is_mbm_total_enabled())
-		list_add_tail(&mbm_total_event.list, &r->evt_list);
+		list_add_tail(&mbm_total_event.list, &r->mon.evt_list);
 	if (is_mbm_local_enabled())
-		list_add_tail(&mbm_local_event.list, &r->evt_list);
+		list_add_tail(&mbm_local_event.list, &r->mon.evt_list);
 }
 
 int __init rdt_get_mon_l3_config(struct rdt_resource *r)
@@ -1023,7 +1023,7 @@ int __init rdt_get_mon_l3_config(struct rdt_resource *r)
 
 	resctrl_rmid_realloc_limit = boot_cpu_data.x86_cache_size * 1024;
 	hw_res->mon_scale = boot_cpu_data.x86_cache_occ_scale;
-	r->num_rmid = boot_cpu_data.x86_cache_max_rmid + 1;
+	r->mon.num_rmid = boot_cpu_data.x86_cache_max_rmid + 1;
 	hw_res->mbm_width = MBM_CNTR_WIDTH_BASE;
 
 	if (mbm_offset > 0 && mbm_offset <= MBM_CNTR_WIDTH_OFFSET_MAX)
@@ -1038,7 +1038,7 @@ int __init rdt_get_mon_l3_config(struct rdt_resource *r)
 	 *
 	 * For a 35MB LLC and 56 RMIDs, this is ~1.8% of the LLC.
 	 */
-	threshold = resctrl_rmid_realloc_limit / r->num_rmid;
+	threshold = resctrl_rmid_realloc_limit / r->mon.num_rmid;
 
 	/*
 	 * Because num_rmid may not be a power of two, round the value
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index 02f213f1c51c..7114d58ef1e3 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1098,7 +1098,7 @@ static int rdt_num_rmids_show(struct kernfs_open_file *of,
 {
 	struct rdt_resource *r = of->kn->parent->priv;
 
-	seq_printf(seq, "%d\n", r->num_rmid);
+	seq_printf(seq, "%d\n", r->mon.num_rmid);
 
 	return 0;
 }
@@ -1109,7 +1109,7 @@ static int rdt_mon_features_show(struct kernfs_open_file *of,
 	struct rdt_resource *r = of->kn->parent->priv;
 	struct mon_evt *mevt;
 
-	list_for_each_entry(mevt, &r->evt_list, list) {
+	list_for_each_entry(mevt, &r->mon.evt_list, list) {
 		seq_printf(seq, "%s\n", mevt->name);
 		if (mevt->configurable)
 			seq_printf(seq, "%s_config\n", mevt->name);
@@ -3042,14 +3042,14 @@ static int mkdir_mondata_subdir(struct kernfs_node *parent_kn,
 	if (ret)
 		goto out_destroy;
 
-	if (WARN_ON(list_empty(&r->evt_list))) {
+	if (WARN_ON(list_empty(&r->mon.evt_list))) {
 		ret = -EPERM;
 		goto out_destroy;
 	}
 
 	priv.u.rid = r->rid;
 	priv.u.domid = d->id;
-	list_for_each_entry(mevt, &r->evt_list, list) {
+	list_for_each_entry(mevt, &r->mon.evt_list, list) {
 		priv.u.evtid = mevt->evtid;
 		ret = mon_addfile(kn, mevt->name, priv.priv);
 		if (ret)
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index a365f67131ec..bf99eb9c6ce4 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -150,22 +150,31 @@ struct resctrl_membw {
 struct rdt_parse_data;
 struct resctrl_schema;
 
+/**
+ * struct resctrl_mon - Monitoring related data
+ * @num_rmid:		Number of RMIDs available
+ * @evt_list:		List of monitoring events
+ */
+struct resctrl_mon {
+	int			num_rmid;
+	struct list_head	evt_list;
+};
+
 /**
  * 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
  * @cache:		Cache allocation related data
  * @membw:		If the component has bandwidth controls, their properties.
+ * @mon:		Monitoring related data.
  * @domains:		RCU list of all 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.
  * @format_str:		Per resource format string to show domain value
  * @parse_ctrlval:	Per resource function pointer to parse control values
- * @evt_list:		List of monitoring events
  * @fflags:		flags to choose base and info files
  * @cdp_capable:	Is the CDP feature available on this resource
  */
@@ -173,10 +182,10 @@ struct rdt_resource {
 	int			rid;
 	bool			alloc_capable;
 	bool			mon_capable;
-	int			num_rmid;
 	int			cache_level;
 	struct resctrl_cache	cache;
 	struct resctrl_membw	membw;
+	struct resctrl_mon	mon;
 	struct list_head	domains;
 	char			*name;
 	int			data_width;
@@ -185,7 +194,6 @@ struct rdt_resource {
 	int			(*parse_ctrlval)(struct rdt_parse_data *data,
 						 struct resctrl_schema *s,
 						 struct rdt_domain *d);
-	struct list_head	evt_list;
 	unsigned long		fflags;
 	bool			cdp_capable;
 };
-- 
2.34.1