From: kan.liang@linux.intel.com
To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
namhyung@kernel.org, irogers@google.com, adrian.hunter@intel.com,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org
Cc: ak@linux.intel.com, eranian@google.com,
dapeng1.mi@linux.intel.com, Kan Liang <kan.liang@linux.intel.com>,
stable@vger.kernel.org
Subject: [PATCH V7 1/3] perf/x86/intel/ds: Add PEBS format 6
Date: Fri, 20 Dec 2024 06:38:53 -0800 [thread overview]
Message-ID: <20241220143855.1082718-1-kan.liang@linux.intel.com> (raw)
From: Kan Liang <kan.liang@linux.intel.com>
The only difference between 5 and 6 is the new counters snapshotting
group, without the following counters snapshotting enabling patches,
it's impossible to utilize the feature in a PEBS record. It's safe to
share the same code path with format 5.
Add format 6, so the end user can at least utilize the legacy PEBS
features.
Fixes: a932aa0e868f ("perf/x86: Add Lunar Lake and Arrow Lake support")
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Cc: stable@vger.kernel.org
---
No changes since V6
arch/x86/events/intel/ds.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/events/intel/ds.c b/arch/x86/events/intel/ds.c
index 8dcf90f6fb59..ba74e1198328 100644
--- a/arch/x86/events/intel/ds.c
+++ b/arch/x86/events/intel/ds.c
@@ -2551,6 +2551,7 @@ void __init intel_ds_init(void)
x86_pmu.large_pebs_flags |= PERF_SAMPLE_TIME;
break;
+ case 6:
case 5:
x86_pmu.pebs_ept = 1;
fallthrough;
--
2.38.1
next reply other threads:[~2024-12-20 14:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-20 14:38 kan.liang [this message]
2024-12-20 14:38 ` [PATCH V7 2/3] perf: Avoid the read if the count is already updated kan.liang
2024-12-20 14:38 ` [PATCH V7 3/3] perf/x86/intel: Support PEBS counters snapshotting kan.liang
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