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

The new sanity check introduced by:

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

... triggered on the AMD uncore driver.

Uncore PMUs are per node, they cannot have per-task counters. Fix it.

Reported-by: Borislav Petkov <bp@suse.de>
Reported-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@redhat.com
Cc: alexander.shishkin@linux.intel.com
Cc: eranian@google.com
Cc: jolsa@redhat.com
Cc: linux-tip-commits@vger.kernel.org
Cc: vincent.weaver@maine.edu
Link: http://lkml.kernel.org/r/20160404140208.GA3448@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index 3db9569..98ac573 100644 (file)
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -263,6 +263,7 @@ static const struct attribute_group *amd_uncore_attr_groups[] = {
 };
 
 static struct pmu amd_nb_pmu = {
+       .task_ctx_nr    = perf_invalid_context,
        .attr_groups    = amd_uncore_attr_groups,
        .name           = "amd_nb",
        .event_init     = amd_uncore_event_init,
@@ -274,6 +275,7 @@ static struct pmu amd_nb_pmu = {
 };
 
 static struct pmu amd_l2_pmu = {
+       .task_ctx_nr    = perf_invalid_context,
        .attr_groups    = amd_uncore_attr_groups,
        .name           = "amd_l2",
        .event_init     = amd_uncore_event_init,