fs/resctrl: Split L3 dependent parts out of __mon_event_count()

Carve out the L3 resource specific event reading code into a separate helper
to support reading event data from a new monitoring resource.

Suggested-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com

diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c
index 572a9925bd6ca073f499db3721b10277c56e3b61..b5e0db38c8bfdcccfbe92bb12d22a9b280010ce2 100644 (file)
--- a/fs/resctrl/monitor.c
+++ b/fs/resctrl/monitor.c
@@ -413,7 +413,7 @@ static void mbm_cntr_free(struct rdt_mon_domain *d, int cntr_id)
        memset(&d->cntr_cfg[cntr_id], 0, sizeof(*d->cntr_cfg));
 }
 
-static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
+static int __l3_mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
 {
        int cpu = smp_processor_id();
        u32 closid = rdtgrp->closid;
@@ -494,6 +494,17 @@ static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
        return ret;
 }
 
+static int __mon_event_count(struct rdtgroup *rdtgrp, struct rmid_read *rr)
+{
+       switch (rr->r->rid) {
+       case RDT_RESOURCE_L3:
+               return __l3_mon_event_count(rdtgrp, rr);
+       default:
+               rr->err = -EINVAL;
+               return -EINVAL;
+       }
+}
+
 /*
  * mbm_bw_count() - Update bw count from values previously read by
  *                 __mon_event_count().