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perf/x86/amd/iommu: Do not register a task ctx for uncore like PMUs

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The new sanity check introduced by:

  26657848502b ("perf/core: Verify we have a single perf_hw_context PMU")

... triggered on the AMD IOMMU driver.

IOMMUs are not per logical CPU, they cannot have per-task counters. Fix it.

Reported-by: Borislav Petkov <bp@alien8.de>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: jroedel@suse.de
Cc: suravee.suthikulpanit@amd.com
Link: http://lkml.kernel.org/r/20160423224255.GB3430@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2016-04-24 00:42:55 +02:00 committed by Ingo Molnar
parent cba1b3798e
commit 8482716b9d
1 changed files with 1 additions and 0 deletions
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arch/x86/events/amd/iommu.c
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@ -474,6 +474,7 @@ static __init int _init_perf_amd_iommu(
static struct perf_amd_iommu __perf_iommu = {
.pmu = {
.task_ctx_nr = perf_invalid_context,
.event_init = perf_iommu_event_init,
.add = perf_iommu_add,
.del = perf_iommu_del,