linux-kernel - [PATCH v2 11/16] x86/resctrl: Link known events onto RDT_RESOURCE_INTEL_AET.evt

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Message-ID: <20250321231609.57418-12-tony.luck@intel.com>
Date: Fri, 21 Mar 2025 16:16:01 -0700
From: Tony Luck <tony.luck@...el.com>
To: Fenghua Yu <fenghuay@...dia.com>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
	Peter Newman <peternewman@...gle.com>,
	James Morse <james.morse@....com>,
	Babu Moger <babu.moger@....com>,
	Drew Fustini <dfustini@...libre.com>,
	Dave Martin <Dave.Martin@....com>
Cc: linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev,
	Tony Luck <tony.luck@...el.com>
Subject: [PATCH v2 11/16] x86/resctrl: Link known events onto RDT_RESOURCE_INTEL_AET.evt_list

Core code uses this list to populate "mon_data" directories.

Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 arch/x86/kernel/cpu/resctrl/intel_aet.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/resctrl/intel_aet.c b/arch/x86/kernel/cpu/resctrl/intel_aet.c
index e2d8eab997fc..9ac912742ef1 100644
--- a/arch/x86/kernel/cpu/resctrl/intel_aet.c
+++ b/arch/x86/kernel/cpu/resctrl/intel_aet.c
@@ -13,6 +13,7 @@
 
 #include <linux/cpu.h>
 #include <linux/cleanup.h>
+#include <linux/minmax.h>
 #include <linux/slab.h>
 #include "fake_intel_aet_features.h"
 #include <linux/intel_vsec.h>
@@ -308,14 +309,34 @@ void rdt_get_intel_aet_mount(void)
 {
 	struct rdt_resource *r = &rdt_resources_all[RDT_RESOURCE_INTEL_AET].r_resctrl;
 	struct rdt_core_mon_domain *d, *tmp;
+	struct telem_entry **tentry;
 	static int do_one_time;
+	struct mon_evt *evt;
+	bool ret = false;
 
 	if (do_one_time)
 		return;
 
 	do_one_time = 1;
 
-	if (!get_events()) {
+	if (!get_events())
+		goto done;
+
+	for (tentry = telem_entry; *tentry; tentry++) {
+		if (!(*tentry)->active)
+			continue;
+		for (int i = 0; (*tentry)->evts[i].evt.name; i++) {
+			evt = &(*tentry)->evts[i].evt;
+			list_add_tail(&evt->list, &r->evt_list);
+			ret = true;
+		}
+		if (!r->num_rmid)
+			r->num_rmid = (*tentry)->num_rmids;
+		else
+			r->num_rmid = min(r->num_rmid, (*tentry)->num_rmids);
+	}
+done:
+	if (!ret) {
 		list_for_each_entry_safe(d, tmp, &r->mon_domains, hdr.list)
 			kfree(d);
 		r->mon_capable = false;
-- 
2.48.1