From: Dapeng Mi <dapeng1.mi@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>,
Eranian Stephane <eranian@google.com>
Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Dapeng Mi <dapeng1.mi@intel.com>, Zide Chen <zide.chen@intel.com>,
Falcon Thomas <thomas.falcon@intel.com>,
Xudong Hao <xudong.hao@intel.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>,
stable@vger.kernel.org
Subject: [Patch v4 4/5] perf/x86/intel: Enable auto counter reload for DMR
Date: Thu, 30 Apr 2026 08:25:57 +0800 [thread overview]
Message-ID: <20260430002558.712334-5-dapeng1.mi@linux.intel.com> (raw)
In-Reply-To: <20260430002558.712334-1-dapeng1.mi@linux.intel.com>
Panther cove µarch starts to support auto counter reload (ACR), but the
static_call intel_pmu_enable_acr_event() is not updated for the Panther
Cove µarch used by DMR. It leads to the auto counter reload is not
really enabled on DMR.
Update static_call intel_pmu_enable_acr_event() in intel_pmu_init_pnc().
Cc: stable@vger.kernel.org
Fixes: d345b6bb8860 ("perf/x86/intel: Add core PMU support for DMR")
Signed-off-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
---
arch/x86/events/intel/core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 9e77d836b878..4d5c35f0df5c 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -7518,6 +7518,7 @@ static __always_inline void intel_pmu_init_pnc(struct pmu *pmu)
hybrid(pmu, event_constraints) = intel_pnc_event_constraints;
hybrid(pmu, pebs_constraints) = intel_pnc_pebs_event_constraints;
hybrid(pmu, extra_regs) = intel_pnc_extra_regs;
+ static_call_update(intel_pmu_enable_acr_event, intel_pmu_enable_acr);
}
static __always_inline void intel_pmu_init_skt(struct pmu *pmu)
--
2.34.1
next prev parent reply other threads:[~2026-04-30 0:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-30 0:25 [Patch v4 0/5] perf/x86/intel: Fix bugs of auto counter reload sampling Dapeng Mi
2026-04-30 0:25 ` [Patch v4 1/5] perf/x86/intel: Improve validation and configuration of ACR masks Dapeng Mi
2026-05-05 10:50 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2026-04-30 0:25 ` [Patch v4 2/5] perf/x86/intel: Always reprogram ACR events to prevent stale masks Dapeng Mi
2026-05-05 10:50 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2026-04-30 0:25 ` [Patch v4 3/5] perf/x86/intel: Disable PMI for self-reloaded ACR events Dapeng Mi
2026-05-05 10:49 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
2026-04-30 0:25 ` Dapeng Mi [this message]
2026-05-05 10:49 ` [tip: perf/core] perf/x86/intel: Enable auto counter reload for DMR tip-bot2 for Dapeng Mi
2026-04-30 0:25 ` [Patch v4 5/5] perf/x86/intel: Consolidate MSR_IA32_PERF_CFG_C tracking Dapeng Mi
2026-05-05 10:49 ` [tip: perf/core] " tip-bot2 for Dapeng Mi
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