linux-kernel - [PATCH 21/31] perf, x86: Add Haswell specific transaction flag reporting

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Date:	Tue,  2 Oct 2012 16:48:41 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	acme@...hat.com, x86@...r.kernel.org, eranian@...gle.com,
	jolsa@...hat.com, a.p.zijlstra@...llo.nl,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 21/31] perf, x86: Add Haswell specific transaction flag reporting

From: Andi Kleen <ak@...ux.intel.com>

In the PEBS handler report the transaction flags using the new
generic transaction flags facility. Most of them come from
the "tsx_tuning" field in PEBSv2, but the abort code is derived
from the RAX register reported in the PEBS record.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 arch/x86/kernel/cpu/perf_event_intel_ds.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event_intel_ds.c b/arch/x86/kernel/cpu/perf_event_intel_ds.c
index 6066740..44394d4 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_ds.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_ds.c
@@ -684,6 +684,15 @@ static void __intel_pmu_pebs_event(struct perf_event *event,
 			data.weight = ((struct pebs_record_v2 *)pebs)->nhm.lat;
 	}
 
+	if ((event->attr.sample_type & PERF_SAMPLE_TRANSACTION) &&
+	    x86_pmu.intel_cap.pebs_format >= 2) {
+		data.transaction =
+		     ((struct pebs_record_v2 *)pebs)->tsx_tuning >> 32;
+		if ((data.transaction & PERF_SAMPLE_TXN_TRANSACTION) &&
+		    (pebs->ax & 1))
+			data.transaction |= pebs->ax & 0xff000000;
+	}
+
 	if (has_branch_stack(event))
 		data.br_stack = &cpuc->lbr_stack;
 
-- 
1.7.7.6

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