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From:   James Clark <james.clark@arm.com>
To:     linux-perf-users@vger.kernel.org, irogers@google.com,
        anshuman.khandual@arm.com, will@kernel.org
Cc:     James Clark <james.clark@arm.com>,
        Peter Zijlstra <peterz@infradead.org>,
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        Adrian Hunter <adrian.hunter@intel.com>,
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        Borislav Petkov <bp@alien8.de>,
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        Kan Liang <kan.liang@linux.intel.com>,
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Subject: [PATCH v2 2/4] perf/x86: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability
Date:   Mon, 24 Jul 2023 14:44:57 +0100
Message-Id: <20230724134500.970496-3-james.clark@arm.com>
In-Reply-To: <20230724134500.970496-1-james.clark@arm.com>
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Since commit bd2756811766 ("perf: Rewrite core context handling") the
relationship between perf_event_context and PMUs has changed so that
the error scenario that PERF_PMU_CAP_HETEROGENEOUS_CPUS originally
silenced no longer exists.

Remove the capability to avoid confusion that it actually influences
any perf core behavior. This change should be a no-op.

Acked-by: Ian Rogers <irogers@google.com>
Signed-off-by: James Clark <james.clark@arm.com>
---
 arch/x86/events/core.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 9d248703cbdd..2353aaf0b248 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -2168,7 +2168,6 @@ static int __init init_hw_perf_events(void)
 			hybrid_pmu->pmu = pmu;
 			hybrid_pmu->pmu.type = -1;
 			hybrid_pmu->pmu.attr_update = x86_pmu.attr_update;
-			hybrid_pmu->pmu.capabilities |= PERF_PMU_CAP_HETEROGENEOUS_CPUS;
 			hybrid_pmu->pmu.capabilities |= PERF_PMU_CAP_EXTENDED_HW_TYPE;
 
 			err = perf_pmu_register(&hybrid_pmu->pmu, hybrid_pmu->name,
-- 
2.34.1