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path: root/fs/resctrl/ctrlmondata.c
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Diffstat (limited to 'fs/resctrl/ctrlmondata.c')
-rw-r--r--fs/resctrl/ctrlmondata.c26
1 files changed, 19 insertions, 7 deletions
diff --git a/fs/resctrl/ctrlmondata.c b/fs/resctrl/ctrlmondata.c
index 3c39cfacb251..0d0ef54fc4de 100644
--- a/fs/resctrl/ctrlmondata.c
+++ b/fs/resctrl/ctrlmondata.c
@@ -473,12 +473,12 @@ ssize_t rdtgroup_mba_mbps_event_write(struct kernfs_open_file *of,
rdt_last_cmd_clear();
if (!strcmp(buf, "mbm_local_bytes")) {
- if (resctrl_arch_is_mbm_local_enabled())
+ if (resctrl_is_mon_event_enabled(QOS_L3_MBM_LOCAL_EVENT_ID))
rdtgrp->mba_mbps_event = QOS_L3_MBM_LOCAL_EVENT_ID;
else
ret = -EINVAL;
} else if (!strcmp(buf, "mbm_total_bytes")) {
- if (resctrl_arch_is_mbm_total_enabled())
+ if (resctrl_is_mon_event_enabled(QOS_L3_MBM_TOTAL_EVENT_ID))
rdtgrp->mba_mbps_event = QOS_L3_MBM_TOTAL_EVENT_ID;
else
ret = -EINVAL;
@@ -563,10 +563,15 @@ void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
rr->r = r;
rr->d = d;
rr->first = first;
- rr->arch_mon_ctx = resctrl_arch_mon_ctx_alloc(r, evtid);
- if (IS_ERR(rr->arch_mon_ctx)) {
- rr->err = -EINVAL;
- return;
+ if (resctrl_arch_mbm_cntr_assign_enabled(r) &&
+ resctrl_is_mbm_event(evtid)) {
+ rr->is_mbm_cntr = true;
+ } else {
+ rr->arch_mon_ctx = resctrl_arch_mon_ctx_alloc(r, evtid);
+ if (IS_ERR(rr->arch_mon_ctx)) {
+ rr->err = -EINVAL;
+ return;
+ }
}
cpu = cpumask_any_housekeeping(cpumask, RESCTRL_PICK_ANY_CPU);
@@ -582,7 +587,8 @@ void mon_event_read(struct rmid_read *rr, struct rdt_resource *r,
else
smp_call_on_cpu(cpu, smp_mon_event_count, rr, false);
- resctrl_arch_mon_ctx_free(r, evtid, rr->arch_mon_ctx);
+ if (rr->arch_mon_ctx)
+ resctrl_arch_mon_ctx_free(r, evtid, rr->arch_mon_ctx);
}
int rdtgroup_mondata_show(struct seq_file *m, void *arg)
@@ -653,10 +659,16 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg)
checkresult:
+ /*
+ * -ENOENT is a special case, set only when "mbm_event" counter assignment
+ * mode is enabled and no counter has been assigned.
+ */
if (rr.err == -EIO)
seq_puts(m, "Error\n");
else if (rr.err == -EINVAL)
seq_puts(m, "Unavailable\n");
+ else if (rr.err == -ENOENT)
+ seq_puts(m, "Unassigned\n");
else
seq_printf(m, "%llu\n", rr.val);