Messages in this thread | | | Date | Fri, 17 Jan 2020 13:05:44 +0000 | From | Will Deacon <> | Subject | Re: [PATCH 1/1] Return EINVAL when precise_ip perf events are requested on Arm |
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> On Wed, Jan 15, 2020 at 10:58:55AM +0000, James Clark wrote: > > diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c > > index df352b334ea7..4ddbdb93b3b6 100644 > > --- a/drivers/perf/arm_pmu.c > > +++ b/drivers/perf/arm_pmu.c > > @@ -102,6 +102,9 @@ armpmu_map_event(struct perf_event *event, > > u64 config = event->attr.config; > > int type = event->attr.type; > > > > + if (event->attr.precise) > > + return -EINVAL;
Also, does this field even exist? Guessing you mean 'precise_ip', but then that means this hasn't even seen a compiler :(
Will
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