linux-kernel - [tip:perf/core] perf intel-pt: Add reserved byte to CBR packet payload

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Message-ID: <tip-26fb2fb19c28ec692d6604bb01cbb4f03a4ee009@git.kernel.org>
Date:   Wed, 21 Jun 2017 11:27:03 -0700
From:   tip-bot for Adrian Hunter <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, hpa@...or.com, ak@...ux.intel.com,
        adrian.hunter@...el.com, mingo@...nel.org, tglx@...utronix.de,
        acme@...hat.com
Subject: [tip:perf/core] perf intel-pt: Add reserved byte to CBR packet
 payload

Commit-ID:  26fb2fb19c28ec692d6604bb01cbb4f03a4ee009
Gitweb:     http://git.kernel.org/tip/26fb2fb19c28ec692d6604bb01cbb4f03a4ee009
Author:     Adrian Hunter <adrian.hunter@...el.com>
AuthorDate: Fri, 26 May 2017 11:17:15 +0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 21 Jun 2017 11:35:50 -0300

perf intel-pt: Add reserved byte to CBR packet payload

Future proof CBR packet decoding by passing through also the undefined
'reserved' byte in the packet payload.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-15-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/intel-pt-decoder/intel-pt-decoder.c     | 2 +-
 tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c | 2 +-
 2 files changed, 2 insertions(+), 2 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 e42804d..96bf8d8 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1444,7 +1444,7 @@ static void intel_pt_calc_mtc_timestamp(struct intel_pt_decoder *decoder)
 
 static void intel_pt_calc_cbr(struct intel_pt_decoder *decoder)
 {
-	unsigned int cbr = decoder->packet.payload;
+	unsigned int cbr = decoder->packet.payload & 0xff;
 
 	if (decoder->cbr == cbr)
 		return;
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
index accdb64..ba4c9dd 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
@@ -130,7 +130,7 @@ static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
 	if (len < 4)
 		return INTEL_PT_NEED_MORE_BYTES;
 	packet->type = INTEL_PT_CBR;
-	packet->payload = buf[2];
+	packet->payload = le16_to_cpu(*(uint16_t *)(buf + 2));
 	return 4;
 }