Hi Reinette,

On 7/30/25 15:11, Reinette Chatre wrote:

Hi Babu,

On 7/25/25 11:29 AM, Babu Moger wrote:

quoted

diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c
index 1aeac350774d..68ba08e95a54 100644
--- a/fs/resctrl/rdtgroup.c
+++ b/fs/resctrl/rdtgroup.c

@@ -1865,6 +1865,75 @@ static int resctrl_mbm_assign_mode_show(struct kernfs_open_file *of,
 	return 0;
 }
 
+static ssize_t resctrl_mbm_assign_mode_write(struct kernfs_open_file *of,
+					     char *buf, size_t nbytes, loff_t off)

Please move to monitor.c

Sure.

quoted

+{
+	struct rdt_resource *r = rdt_kn_parent_priv(of->kn);
+	struct rdt_mon_domain *d;
+	int ret = 0;
+	bool enable;
+
+	/* Valid input requires a trailing newline */
+	if (nbytes == 0 || buf[nbytes - 1] != '\n')
+		return -EINVAL;
+
+	buf[nbytes - 1] = '\0';
+
+	cpus_read_lock();
+	mutex_lock(&rdtgroup_mutex);
+
+	rdt_last_cmd_clear();
+
+	if (!strcmp(buf, "default")) {
+		enable = 0;
+	} else if (!strcmp(buf, "mbm_event")) {
+		if (r->mon.mbm_cntr_assignable) {
+			enable = 1;
+		} else {
+			ret = -EINVAL;
+			rdt_last_cmd_puts("mbm_event mode is not supported\n");
+			goto out_unlock;
+		}
+	} else {
+		ret = -EINVAL;
+		rdt_last_cmd_puts("Unsupported assign mode\n");
+		goto out_unlock;
+	}
+
+	if (enable != resctrl_arch_mbm_cntr_assign_enabled(r)) {
+		ret = resctrl_arch_mbm_cntr_assign_set(r, enable);
+		if (ret)
+			goto out_unlock;
+
+		/* Update the visibility of BMEC related files */
+		resctrl_bmec_files_show(r, NULL, !enable);
+
+		/*
+		 * Initialize the default memory transaction values for
+		 * total and local events.
+		 */
+		if (resctrl_is_mon_event_enabled(QOS_L3_MBM_TOTAL_EVENT_ID))
+			mon_event_all[QOS_L3_MBM_TOTAL_EVENT_ID].evt_cfg = MAX_EVT_CONFIG_BITS;
+		if (resctrl_is_mon_event_enabled(QOS_L3_MBM_LOCAL_EVENT_ID))
+			mon_event_all[QOS_L3_MBM_LOCAL_EVENT_ID].evt_cfg = READS_TO_LOCAL_MEM |
+									   READS_TO_LOCAL_S_MEM |
+									   NON_TEMP_WRITE_TO_LOCAL_MEM;

This needs to take into account the configurations that
hardware supports.

Yes. Sure.

-- 
Thanks
Babu Moger