linux-kernel - [tip:perf/core] perf intel-pt: Factor out intel_pt_8b

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Message-ID: <tip-e72b52a2cfdea5cb0279b2d63a36d78b8c2134de@git.kernel.org>
Date:   Mon, 17 Jun 2019 12:41:00 -0700
From:   tip-bot for Adrian Hunter <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     acme@...hat.com, adrian.hunter@...el.com, mingo@...nel.org,
        linux-kernel@...r.kernel.org, tglx@...utronix.de, jolsa@...hat.com,
        hpa@...or.com, yao.jin@...ux.intel.com
Subject: [tip:perf/core] perf intel-pt: Factor out intel_pt_8b_tsc()

Commit-ID:  e72b52a2cfdea5cb0279b2d63a36d78b8c2134de
Gitweb:     https://git.kernel.org/tip/e72b52a2cfdea5cb0279b2d63a36d78b8c2134de
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Tue, 4 Jun 2019 16:00:03 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 10 Jun 2019 16:20:12 -0300

perf intel-pt: Factor out intel_pt_8b_tsc()

Factor out intel_pt_8b_tsc() so it can be reused.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jin Yao <yao.jin@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Link: http://lkml.kernel.org/r/20190604130017.31207-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 .../perf/util/intel-pt-decoder/intel-pt-decoder.c  | 26 ++++++++++++++--------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index 13123b195083..c06dceb774e9 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1369,6 +1369,21 @@ static int intel_pt_mode_tsx(struct intel_pt_decoder *decoder, bool *no_tip)
 	return 0;
 }
 
+static uint64_t intel_pt_8b_tsc(uint64_t timestamp, uint64_t ref_timestamp)
+{
+	timestamp |= (ref_timestamp & (0xffULL << 56));
+
+	if (timestamp < ref_timestamp) {
+		if (ref_timestamp - timestamp > (1ULL << 55))
+			timestamp += (1ULL << 56);
+	} else {
+		if (timestamp - ref_timestamp > (1ULL << 55))
+			timestamp -= (1ULL << 56);
+	}
+
+	return timestamp;
+}
+
 static void intel_pt_calc_tsc_timestamp(struct intel_pt_decoder *decoder)
 {
 	uint64_t timestamp;
@@ -1376,15 +1391,8 @@ static void intel_pt_calc_tsc_timestamp(struct intel_pt_decoder *decoder)
 	decoder->have_tma = false;
 
 	if (decoder->ref_timestamp) {
-		timestamp = decoder->packet.payload |
-			    (decoder->ref_timestamp & (0xffULL << 56));
-		if (timestamp < decoder->ref_timestamp) {
-			if (decoder->ref_timestamp - timestamp > (1ULL << 55))
-				timestamp += (1ULL << 56);
-		} else {
-			if (timestamp - decoder->ref_timestamp > (1ULL << 55))
-				timestamp -= (1ULL << 56);
-		}
+		timestamp = intel_pt_8b_tsc(decoder->packet.payload,
+					    decoder->ref_timestamp);
 		decoder->tsc_timestamp = timestamp;
 		decoder->timestamp = timestamp;
 		decoder->ref_timestamp = 0;