On 13/08/2025 6:01 pm, Robin Murphy wrote:
[...]
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 297ff5adb667..98ffab403bb4 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -731,24 +731,11 @@ static int uncore_pmu_event_init(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int ret;
- if (event->attr.type != event->pmu->type)
- return -ENOENT;
-
pmu = uncore_event_to_pmu(event);
/* no device found for this pmu */
if (!pmu->registered)
return -ENOENT;
- /* Sampling not supported yet */
- if (hwc->sample_period)
- return -EINVAL;
-
- /*
- * Place all uncore events for a particular physical package
- * onto a single cpu
- */
- if (event->cpu < 0)
- return -EINVAL;
Oopsie, I missed that this isn't just the usual boilerplate as the
comment kind of implies, but is also necessary to prevent the
uncore_pmu_to_box() lookup going wrong (since the core code won't reject
a task-bound event until later). I'll put this back with an updated
comment for v2 (and double-check everything else again...), thanks LKP!
Robin.
box = uncore_pmu_to_box(pmu, event->cpu);
if (!box || box->cpu < 0)
return -EINVAL;
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